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Diffstat (limited to '')
38 files changed, 14986 insertions, 0 deletions
diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig new file mode 100644 index 000000000..f39b7b3f7 --- /dev/null +++ b/drivers/input/serio/Kconfig @@ -0,0 +1,321 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Input core configuration +# +config SERIO + tristate "Serial I/O support" + default y + help + Say Yes here if you have any input device that uses serial I/O to + communicate with the system. This includes the + * standard AT keyboard and PS/2 mouse * + as well as serial mice, Sun keyboards, some joysticks and 6dof + devices and more. + + If unsure, say Y. + + To compile this driver as a module, choose M here: the + module will be called serio. + +config ARCH_MIGHT_HAVE_PC_SERIO + bool + help + Select this config option from the architecture Kconfig if + the architecture might use a PC serio device (i8042) to + communicate with keyboard, mouse, etc. + +if SERIO + +config SERIO_I8042 + tristate "i8042 PC Keyboard controller" + default y + depends on ARCH_MIGHT_HAVE_PC_SERIO + help + i8042 is the chip over which the standard AT keyboard and PS/2 + mouse are connected to the computer. If you use these devices, + you'll need to say Y here. + + If unsure, say Y. + + To compile this driver as a module, choose M here: the + module will be called i8042. + +config SERIO_SERPORT + tristate "Serial port line discipline" + default y + depends on TTY + help + Say Y here if you plan to use an input device (mouse, joystick, + tablet, 6dof) that communicates over the RS232 serial (COM) port. + + More information is available: <file:Documentation/input/input.rst> + + If unsure, say Y. + + To compile this driver as a module, choose M here: the + module will be called serport. + +config SERIO_CT82C710 + tristate "ct82c710 Aux port controller" + depends on X86 + help + Say Y here if you have a Texas Instruments TravelMate notebook + equipped with the ct82c710 chip and want to use a mouse connected + to the "QuickPort". + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called ct82c710. + +config SERIO_Q40KBD + tristate "Q40 keyboard controller" + depends on Q40 + +config SERIO_PARKBD + tristate "Parallel port keyboard adapter" + depends on PARPORT + help + Say Y here if you built a simple parallel port adapter to attach + an additional AT keyboard, XT keyboard or PS/2 mouse. + + More information is available: <file:Documentation/input/input.rst> + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called parkbd. + +config SERIO_RPCKBD + tristate "Acorn RiscPC keyboard controller" + depends on ARCH_ACORN + default y + help + Say Y here if you have the Acorn RiscPC and want to use an AT + keyboard connected to its keyboard controller. + + To compile this driver as a module, choose M here: the + module will be called rpckbd. + +config SERIO_AMBAKMI + tristate "AMBA KMI keyboard controller" + depends on ARM_AMBA + +config SERIO_SA1111 + tristate "Intel SA1111 keyboard controller" + depends on SA1111 + +config SERIO_GSCPS2 + tristate "HP GSC PS/2 keyboard and PS/2 mouse controller" + depends on GSC + default y + help + This driver provides support for the PS/2 ports on PA-RISC machines + over which HP PS/2 keyboards and PS/2 mice may be connected. + If you use these devices, you'll need to say Y here. + + It's safe to enable this driver, so if unsure, say Y. + + To compile this driver as a module, choose M here: the + module will be called gscps2. + +config HP_SDC + tristate "HP System Device Controller i8042 Support" + depends on (GSC || HP300) && SERIO + default y + help + This option enables support for the "System Device + Controller", an i8042 carrying microcode to manage a + few miscellaneous devices on some Hewlett Packard systems. + The SDC itself contains a 10ms resolution timer/clock capable + of delivering interrupts on a periodic and one-shot basis. + The SDC may also be connected to a battery-backed real-time + clock, a basic audio waveform generator, and an HP-HIL Master + Link Controller serving up to seven input devices. + + By itself this option is rather useless, but enabling it will + enable selection of drivers for the abovementioned devices. + It is, however, incompatible with the old, reliable HIL keyboard + driver, and the new HIL driver is experimental, so if you plan + to use a HIL keyboard as your primary keyboard, you may wish + to keep using that driver until the new HIL drivers have had + more testing. + +config HIL_MLC + tristate "HIL MLC Support (needed for HIL input devices)" + depends on HP_SDC + +config SERIO_PCIPS2 + tristate "PCI PS/2 keyboard and PS/2 mouse controller" + depends on PCI + help + Say Y here if you have a Mobility Docking station with PS/2 + keyboard and mice ports. + + To compile this driver as a module, choose M here: the + module will be called pcips2. + +config SERIO_MACEPS2 + tristate "SGI O2 MACE PS/2 controller" + depends on SGI_IP32 + help + Say Y here if you have SGI O2 workstation and want to use its + PS/2 ports. + + To compile this driver as a module, choose M here: the + module will be called maceps2. + +config SERIO_SGI_IOC3 + tristate "SGI IOC3 PS/2 controller" + depends on SGI_MFD_IOC3 + help + Say Y here if you have an SGI Onyx2, SGI Octane or IOC3 PCI card + and you want to attach and use a keyboard, mouse, or both. + + To compile this driver as a module, choose M here: the + module will be called ioc3kbd. + +config SERIO_LIBPS2 + tristate "PS/2 driver library" + depends on SERIO_I8042 || SERIO_I8042=n + help + Say Y here if you are using a driver for device connected + to a PS/2 port, such as PS/2 mouse or standard AT keyboard. + + To compile this driver as a module, choose M here: the + module will be called libps2. + +config SERIO_RAW + tristate "Raw access to serio ports" + help + Say Y here if you want to have raw access to serio ports, such as + AUX ports on i8042 keyboard controller. Each serio port that is + bound to this driver will be accessible via a char device with + major 10 and dynamically allocated minor. The driver will try + allocating minor 1 (that historically corresponds to /dev/psaux) + first. To bind this driver to a serio port use sysfs interface: + + echo -n "serio_raw" > /sys/bus/serio/devices/serioX/drvctl + + To compile this driver as a module, choose M here: the + module will be called serio_raw. + +config SERIO_XILINX_XPS_PS2 + tristate "Xilinx XPS PS/2 Controller Support" + depends on PPC || MICROBLAZE + help + This driver supports XPS PS/2 IP from the Xilinx EDK on + PowerPC platform. + + To compile this driver as a module, choose M here: the + module will be called xilinx_ps2. + +config SERIO_ALTERA_PS2 + tristate "Altera UP PS/2 controller" + depends on HAS_IOMEM + help + Say Y here if you have Altera University Program PS/2 ports. + + To compile this driver as a module, choose M here: the + module will be called altera_ps2. + +config SERIO_AMS_DELTA + tristate "Amstrad Delta (E3) mailboard support" + depends on MACH_AMS_DELTA + default y + help + Say Y here if you have an E3 and want to use its mailboard, + or any standard AT keyboard connected to the mailboard port. + + When used for the E3 mailboard, a non-standard key table + must be loaded from userspace, possibly using udev extras + provided keymap helper utility. + + To compile this driver as a module, choose M here; + the module will be called ams_delta_serio. + +config SERIO_PS2MULT + tristate "TQC PS/2 multiplexer" + help + Say Y here if you have the PS/2 line multiplexer like the one + present on TQC boards. + + To compile this driver as a module, choose M here: the + module will be called ps2mult. + +config SERIO_ARC_PS2 + tristate "ARC PS/2 support" + depends on HAS_IOMEM + help + Say Y here if you have an ARC FPGA platform with a PS/2 + controller in it. + + To compile this driver as a module, choose M here; the module + will be called arc_ps2. + +config SERIO_APBPS2 + tristate "GRLIB APBPS2 PS/2 keyboard/mouse controller" + depends on OF && HAS_IOMEM + help + Say Y here if you want support for GRLIB APBPS2 peripherals used + to connect to PS/2 keyboard and/or mouse. + + To compile this driver as a module, choose M here: the module will + be called apbps2. + +config SERIO_OLPC_APSP + tristate "OLPC AP-SP input support" + depends on ARCH_MMP || COMPILE_TEST + help + Say Y here if you want support for the keyboard and touchpad included + in the OLPC XO-1.75 and XO-4 laptops. + + To compile this driver as a module, choose M here: the module will + be called olpc_apsp. + +config HYPERV_KEYBOARD + tristate "Microsoft Synthetic Keyboard driver" + depends on HYPERV + default HYPERV + help + Select this option to enable the Hyper-V Keyboard driver. + + To compile this driver as a module, choose M here: the module will + be called hyperv_keyboard. + +config SERIO_SUN4I_PS2 + tristate "Allwinner A10 PS/2 controller support" + depends on ARCH_SUNXI || COMPILE_TEST + help + This selects support for the PS/2 Host Controller on + Allwinner A10. + + To compile this driver as a module, choose M here: the + module will be called sun4i-ps2. + +config SERIO_GPIO_PS2 + tristate "GPIO PS/2 bit banging driver" + depends on GPIOLIB + help + Say Y here if you want PS/2 bit banging support via GPIO. + + To compile this driver as a module, choose M here: the + module will be called ps2-gpio. + + If you are unsure, say N. + +config USERIO + tristate "User space serio port driver support" + help + Say Y here if you want to support user level drivers for serio + subsystem accessible under char device 10:240 - /dev/userio. Using + this facility userspace programs can implement serio ports that + will be used by the standard in-kernel serio consumer drivers, + such as psmouse and atkbd. + + To compile this driver as a module, choose M here: the module will be + called userio. + + If you are unsure, say N. + +endif diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile new file mode 100644 index 000000000..6d97bad7b --- /dev/null +++ b/drivers/input/serio/Makefile @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the input core drivers. +# + +# Each configuration option enables a list of files. + +obj-$(CONFIG_SERIO) += serio.o +obj-$(CONFIG_SERIO_I8042) += i8042.o +obj-$(CONFIG_SERIO_PARKBD) += parkbd.o +obj-$(CONFIG_SERIO_SERPORT) += serport.o +obj-$(CONFIG_SERIO_CT82C710) += ct82c710.o +obj-$(CONFIG_SERIO_RPCKBD) += rpckbd.o +obj-$(CONFIG_SERIO_SA1111) += sa1111ps2.o +obj-$(CONFIG_SERIO_AMBAKMI) += ambakmi.o +obj-$(CONFIG_SERIO_Q40KBD) += q40kbd.o +obj-$(CONFIG_SERIO_GSCPS2) += gscps2.o +obj-$(CONFIG_HP_SDC) += hp_sdc.o +obj-$(CONFIG_HIL_MLC) += hp_sdc_mlc.o hil_mlc.o +obj-$(CONFIG_SERIO_PCIPS2) += pcips2.o +obj-$(CONFIG_SERIO_PS2MULT) += ps2mult.o +obj-$(CONFIG_SERIO_MACEPS2) += maceps2.o +obj-$(CONFIG_SERIO_SGI_IOC3) += ioc3kbd.o +obj-$(CONFIG_SERIO_LIBPS2) += libps2.o +obj-$(CONFIG_SERIO_RAW) += serio_raw.o +obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o +obj-$(CONFIG_SERIO_XILINX_XPS_PS2) += xilinx_ps2.o +obj-$(CONFIG_SERIO_ALTERA_PS2) += altera_ps2.o +obj-$(CONFIG_SERIO_ARC_PS2) += arc_ps2.o +obj-$(CONFIG_SERIO_APBPS2) += apbps2.o +obj-$(CONFIG_SERIO_OLPC_APSP) += olpc_apsp.o +obj-$(CONFIG_HYPERV_KEYBOARD) += hyperv-keyboard.o +obj-$(CONFIG_SERIO_SUN4I_PS2) += sun4i-ps2.o +obj-$(CONFIG_SERIO_GPIO_PS2) += ps2-gpio.o +obj-$(CONFIG_USERIO) += userio.o diff --git a/drivers/input/serio/altera_ps2.c b/drivers/input/serio/altera_ps2.c new file mode 100644 index 000000000..3a92304f6 --- /dev/null +++ b/drivers/input/serio/altera_ps2.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Altera University Program PS2 controller driver + * + * Copyright (C) 2008 Thomas Chou <thomas@wytron.com.tw> + * + * Based on sa1111ps2.c, which is: + * Copyright (C) 2002 Russell King + */ + +#include <linux/module.h> +#include <linux/input.h> +#include <linux/serio.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/of.h> + +#define DRV_NAME "altera_ps2" + +struct ps2if { + struct serio *io; + void __iomem *base; +}; + +/* + * Read all bytes waiting in the PS2 port. There should be + * at the most one, but we loop for safety. + */ +static irqreturn_t altera_ps2_rxint(int irq, void *dev_id) +{ + struct ps2if *ps2if = dev_id; + unsigned int status; + irqreturn_t handled = IRQ_NONE; + + while ((status = readl(ps2if->base)) & 0xffff0000) { + serio_interrupt(ps2if->io, status & 0xff, 0); + handled = IRQ_HANDLED; + } + + return handled; +} + +/* + * Write a byte to the PS2 port. + */ +static int altera_ps2_write(struct serio *io, unsigned char val) +{ + struct ps2if *ps2if = io->port_data; + + writel(val, ps2if->base); + return 0; +} + +static int altera_ps2_open(struct serio *io) +{ + struct ps2if *ps2if = io->port_data; + + /* clear fifo */ + while (readl(ps2if->base) & 0xffff0000) + /* empty */; + + writel(1, ps2if->base + 4); /* enable rx irq */ + return 0; +} + +static void altera_ps2_close(struct serio *io) +{ + struct ps2if *ps2if = io->port_data; + + writel(0, ps2if->base + 4); /* disable rx irq */ +} + +/* + * Add one device to this driver. + */ +static int altera_ps2_probe(struct platform_device *pdev) +{ + struct ps2if *ps2if; + struct resource *res; + struct serio *serio; + int error, irq; + + ps2if = devm_kzalloc(&pdev->dev, sizeof(struct ps2if), GFP_KERNEL); + if (!ps2if) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ps2if->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ps2if->base)) + return PTR_ERR(ps2if->base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENXIO; + + error = devm_request_irq(&pdev->dev, irq, altera_ps2_rxint, 0, + pdev->name, ps2if); + if (error) { + dev_err(&pdev->dev, "could not request IRQ %d\n", irq); + return error; + } + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + serio->id.type = SERIO_8042; + serio->write = altera_ps2_write; + serio->open = altera_ps2_open; + serio->close = altera_ps2_close; + strscpy(serio->name, dev_name(&pdev->dev), sizeof(serio->name)); + strscpy(serio->phys, dev_name(&pdev->dev), sizeof(serio->phys)); + serio->port_data = ps2if; + serio->dev.parent = &pdev->dev; + ps2if->io = serio; + + dev_info(&pdev->dev, "base %p, irq %d\n", ps2if->base, irq); + + serio_register_port(ps2if->io); + platform_set_drvdata(pdev, ps2if); + + return 0; +} + +/* + * Remove one device from this driver. + */ +static int altera_ps2_remove(struct platform_device *pdev) +{ + struct ps2if *ps2if = platform_get_drvdata(pdev); + + serio_unregister_port(ps2if->io); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id altera_ps2_match[] = { + { .compatible = "ALTR,ps2-1.0", }, + { .compatible = "altr,ps2-1.0", }, + {}, +}; +MODULE_DEVICE_TABLE(of, altera_ps2_match); +#endif /* CONFIG_OF */ + +/* + * Our device driver structure + */ +static struct platform_driver altera_ps2_driver = { + .probe = altera_ps2_probe, + .remove = altera_ps2_remove, + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(altera_ps2_match), + }, +}; +module_platform_driver(altera_ps2_driver); + +MODULE_DESCRIPTION("Altera University Program PS2 controller driver"); +MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c new file mode 100644 index 000000000..c391700fc --- /dev/null +++ b/drivers/input/serio/ambakmi.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * linux/drivers/input/serio/ambakmi.c + * + * Copyright (C) 2000-2003 Deep Blue Solutions Ltd. + * Copyright (C) 2002 Russell King. + */ +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/amba/bus.h> +#include <linux/amba/kmi.h> +#include <linux/clk.h> + +#include <asm/io.h> +#include <asm/irq.h> + +#define KMI_BASE (kmi->base) + +struct amba_kmi_port { + struct serio *io; + struct clk *clk; + void __iomem *base; + unsigned int irq; + unsigned int divisor; + unsigned int open; +}; + +static irqreturn_t amba_kmi_int(int irq, void *dev_id) +{ + struct amba_kmi_port *kmi = dev_id; + unsigned int status = readb(KMIIR); + int handled = IRQ_NONE; + + while (status & KMIIR_RXINTR) { + serio_interrupt(kmi->io, readb(KMIDATA), 0); + status = readb(KMIIR); + handled = IRQ_HANDLED; + } + + return handled; +} + +static int amba_kmi_write(struct serio *io, unsigned char val) +{ + struct amba_kmi_port *kmi = io->port_data; + unsigned int timeleft = 10000; /* timeout in 100ms */ + + while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && --timeleft) + udelay(10); + + if (timeleft) + writeb(val, KMIDATA); + + return timeleft ? 0 : SERIO_TIMEOUT; +} + +static int amba_kmi_open(struct serio *io) +{ + struct amba_kmi_port *kmi = io->port_data; + unsigned int divisor; + int ret; + + ret = clk_prepare_enable(kmi->clk); + if (ret) + goto out; + + divisor = clk_get_rate(kmi->clk) / 8000000 - 1; + writeb(divisor, KMICLKDIV); + writeb(KMICR_EN, KMICR); + + ret = request_irq(kmi->irq, amba_kmi_int, IRQF_SHARED, "kmi-pl050", + kmi); + if (ret) { + printk(KERN_ERR "kmi: failed to claim IRQ%d\n", kmi->irq); + writeb(0, KMICR); + goto clk_disable; + } + + writeb(KMICR_EN | KMICR_RXINTREN, KMICR); + + return 0; + + clk_disable: + clk_disable_unprepare(kmi->clk); + out: + return ret; +} + +static void amba_kmi_close(struct serio *io) +{ + struct amba_kmi_port *kmi = io->port_data; + + writeb(0, KMICR); + + free_irq(kmi->irq, kmi); + clk_disable_unprepare(kmi->clk); +} + +static int amba_kmi_probe(struct amba_device *dev, + const struct amba_id *id) +{ + struct amba_kmi_port *kmi; + struct serio *io; + int ret; + + ret = amba_request_regions(dev, NULL); + if (ret) + return ret; + + kmi = kzalloc(sizeof(struct amba_kmi_port), GFP_KERNEL); + io = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!kmi || !io) { + ret = -ENOMEM; + goto out; + } + + + io->id.type = SERIO_8042; + io->write = amba_kmi_write; + io->open = amba_kmi_open; + io->close = amba_kmi_close; + strscpy(io->name, dev_name(&dev->dev), sizeof(io->name)); + strscpy(io->phys, dev_name(&dev->dev), sizeof(io->phys)); + io->port_data = kmi; + io->dev.parent = &dev->dev; + + kmi->io = io; + kmi->base = ioremap(dev->res.start, resource_size(&dev->res)); + if (!kmi->base) { + ret = -ENOMEM; + goto out; + } + + kmi->clk = clk_get(&dev->dev, "KMIREFCLK"); + if (IS_ERR(kmi->clk)) { + ret = PTR_ERR(kmi->clk); + goto unmap; + } + + kmi->irq = dev->irq[0]; + amba_set_drvdata(dev, kmi); + + serio_register_port(kmi->io); + return 0; + + unmap: + iounmap(kmi->base); + out: + kfree(kmi); + kfree(io); + amba_release_regions(dev); + return ret; +} + +static void amba_kmi_remove(struct amba_device *dev) +{ + struct amba_kmi_port *kmi = amba_get_drvdata(dev); + + serio_unregister_port(kmi->io); + clk_put(kmi->clk); + iounmap(kmi->base); + kfree(kmi); + amba_release_regions(dev); +} + +static int __maybe_unused amba_kmi_resume(struct device *dev) +{ + struct amba_kmi_port *kmi = dev_get_drvdata(dev); + + /* kick the serio layer to rescan this port */ + serio_reconnect(kmi->io); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(amba_kmi_dev_pm_ops, NULL, amba_kmi_resume); + +static const struct amba_id amba_kmi_idtable[] = { + { + .id = 0x00041050, + .mask = 0x000fffff, + }, + { 0, 0 } +}; + +MODULE_DEVICE_TABLE(amba, amba_kmi_idtable); + +static struct amba_driver ambakmi_driver = { + .drv = { + .name = "kmi-pl050", + .owner = THIS_MODULE, + .pm = &amba_kmi_dev_pm_ops, + }, + .id_table = amba_kmi_idtable, + .probe = amba_kmi_probe, + .remove = amba_kmi_remove, +}; + +module_amba_driver(ambakmi_driver); + +MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); +MODULE_DESCRIPTION("AMBA KMI controller driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/serio/ams_delta_serio.c b/drivers/input/serio/ams_delta_serio.c new file mode 100644 index 000000000..ec93cb457 --- /dev/null +++ b/drivers/input/serio/ams_delta_serio.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Amstrad E3 (Delta) keyboard port driver + * + * Copyright (c) 2006 Matt Callow + * Copyright (c) 2010 Janusz Krzysztofik + * + * Thanks to Cliff Lawson for his help + * + * The Amstrad Delta keyboard (aka mailboard) uses normal PC-AT style serial + * transmission. The keyboard port is formed of two GPIO lines, for clock + * and data. Due to strict timing requirements of the interface, + * the serial data stream is read and processed by a FIQ handler. + * The resulting words are fetched by this driver from a circular buffer. + * + * Standard AT keyboard driver (atkbd) is used for handling the keyboard data. + * However, when used with the E3 mailboard that producecs non-standard + * scancodes, a custom key table must be prepared and loaded from userspace. + */ +#include <linux/irq.h> +#include <linux/platform_data/ams-delta-fiq.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/serio.h> +#include <linux/slab.h> +#include <linux/module.h> + +#define DRIVER_NAME "ams-delta-serio" + +MODULE_AUTHOR("Matt Callow"); +MODULE_DESCRIPTION("AMS Delta (E3) keyboard port driver"); +MODULE_LICENSE("GPL"); + +struct ams_delta_serio { + struct serio *serio; + struct regulator *vcc; + unsigned int *fiq_buffer; +}; + +static int check_data(struct serio *serio, int data) +{ + int i, parity = 0; + + /* check valid stop bit */ + if (!(data & 0x400)) { + dev_warn(&serio->dev, "invalid stop bit, data=0x%X\n", data); + return SERIO_FRAME; + } + /* calculate the parity */ + for (i = 1; i < 10; i++) { + if (data & (1 << i)) + parity++; + } + /* it should be odd */ + if (!(parity & 0x01)) { + dev_warn(&serio->dev, + "parity check failed, data=0x%X parity=0x%X\n", data, + parity); + return SERIO_PARITY; + } + return 0; +} + +static irqreturn_t ams_delta_serio_interrupt(int irq, void *dev_id) +{ + struct ams_delta_serio *priv = dev_id; + int *circ_buff = &priv->fiq_buffer[FIQ_CIRC_BUFF]; + int data, dfl; + u8 scancode; + + priv->fiq_buffer[FIQ_IRQ_PEND] = 0; + + /* + * Read data from the circular buffer, check it + * and then pass it on the serio + */ + while (priv->fiq_buffer[FIQ_KEYS_CNT] > 0) { + + data = circ_buff[priv->fiq_buffer[FIQ_HEAD_OFFSET]++]; + priv->fiq_buffer[FIQ_KEYS_CNT]--; + if (priv->fiq_buffer[FIQ_HEAD_OFFSET] == + priv->fiq_buffer[FIQ_BUF_LEN]) + priv->fiq_buffer[FIQ_HEAD_OFFSET] = 0; + + dfl = check_data(priv->serio, data); + scancode = (u8) (data >> 1) & 0xFF; + serio_interrupt(priv->serio, scancode, dfl); + } + return IRQ_HANDLED; +} + +static int ams_delta_serio_open(struct serio *serio) +{ + struct ams_delta_serio *priv = serio->port_data; + + /* enable keyboard */ + return regulator_enable(priv->vcc); +} + +static void ams_delta_serio_close(struct serio *serio) +{ + struct ams_delta_serio *priv = serio->port_data; + + /* disable keyboard */ + regulator_disable(priv->vcc); +} + +static int ams_delta_serio_init(struct platform_device *pdev) +{ + struct ams_delta_serio *priv; + struct serio *serio; + int irq, err; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->fiq_buffer = pdev->dev.platform_data; + if (!priv->fiq_buffer) + return -EINVAL; + + priv->vcc = devm_regulator_get(&pdev->dev, "vcc"); + if (IS_ERR(priv->vcc)) { + err = PTR_ERR(priv->vcc); + dev_err(&pdev->dev, "regulator request failed (%d)\n", err); + /* + * When running on a non-dt platform and requested regulator + * is not available, devm_regulator_get() never returns + * -EPROBE_DEFER as it is not able to justify if the regulator + * may still appear later. On the other hand, the board can + * still set full constriants flag at late_initcall in order + * to instruct devm_regulator_get() to returnn a dummy one + * if sufficient. Hence, if we get -ENODEV here, let's convert + * it to -EPROBE_DEFER and wait for the board to decide or + * let Deferred Probe infrastructure handle this error. + */ + if (err == -ENODEV) + err = -EPROBE_DEFER; + return err; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENXIO; + + err = devm_request_irq(&pdev->dev, irq, ams_delta_serio_interrupt, + IRQ_TYPE_EDGE_RISING, DRIVER_NAME, priv); + if (err < 0) { + dev_err(&pdev->dev, "IRQ request failed (%d)\n", err); + return err; + } + + serio = kzalloc(sizeof(*serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + priv->serio = serio; + + serio->id.type = SERIO_8042; + serio->open = ams_delta_serio_open; + serio->close = ams_delta_serio_close; + strscpy(serio->name, "AMS DELTA keyboard adapter", sizeof(serio->name)); + strscpy(serio->phys, dev_name(&pdev->dev), sizeof(serio->phys)); + serio->dev.parent = &pdev->dev; + serio->port_data = priv; + + serio_register_port(serio); + + platform_set_drvdata(pdev, priv); + + dev_info(&serio->dev, "%s\n", serio->name); + + return 0; +} + +static int ams_delta_serio_exit(struct platform_device *pdev) +{ + struct ams_delta_serio *priv = platform_get_drvdata(pdev); + + serio_unregister_port(priv->serio); + + return 0; +} + +static struct platform_driver ams_delta_serio_driver = { + .probe = ams_delta_serio_init, + .remove = ams_delta_serio_exit, + .driver = { + .name = DRIVER_NAME + }, +}; +module_platform_driver(ams_delta_serio_driver); diff --git a/drivers/input/serio/apbps2.c b/drivers/input/serio/apbps2.c new file mode 100644 index 000000000..9c9ce097f --- /dev/null +++ b/drivers/input/serio/apbps2.c @@ -0,0 +1,222 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Aeroflex Gaisler + * + * This driver supports the APBPS2 PS/2 core available in the GRLIB + * VHDL IP core library. + * + * Full documentation of the APBPS2 core can be found here: + * http://www.gaisler.com/products/grlib/grip.pdf + * + * See "Documentation/devicetree/bindings/input/ps2keyb-mouse-apbps2.txt" for + * information on open firmware properties. + * + * Contributors: Daniel Hellstrom <daniel@gaisler.com> + */ +#include <linux/platform_device.h> +#include <linux/of_device.h> +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/of_irq.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/io.h> + +struct apbps2_regs { + u32 __iomem data; /* 0x00 */ + u32 __iomem status; /* 0x04 */ + u32 __iomem ctrl; /* 0x08 */ + u32 __iomem reload; /* 0x0c */ +}; + +#define APBPS2_STATUS_DR (1<<0) +#define APBPS2_STATUS_PE (1<<1) +#define APBPS2_STATUS_FE (1<<2) +#define APBPS2_STATUS_KI (1<<3) +#define APBPS2_STATUS_RF (1<<4) +#define APBPS2_STATUS_TF (1<<5) +#define APBPS2_STATUS_TCNT (0x1f<<22) +#define APBPS2_STATUS_RCNT (0x1f<<27) + +#define APBPS2_CTRL_RE (1<<0) +#define APBPS2_CTRL_TE (1<<1) +#define APBPS2_CTRL_RI (1<<2) +#define APBPS2_CTRL_TI (1<<3) + +struct apbps2_priv { + struct serio *io; + struct apbps2_regs __iomem *regs; +}; + +static int apbps2_idx; + +static irqreturn_t apbps2_isr(int irq, void *dev_id) +{ + struct apbps2_priv *priv = dev_id; + unsigned long status, data, rxflags; + irqreturn_t ret = IRQ_NONE; + + while ((status = ioread32be(&priv->regs->status)) & APBPS2_STATUS_DR) { + data = ioread32be(&priv->regs->data); + rxflags = (status & APBPS2_STATUS_PE) ? SERIO_PARITY : 0; + rxflags |= (status & APBPS2_STATUS_FE) ? SERIO_FRAME : 0; + + /* clear error bits? */ + if (rxflags) + iowrite32be(0, &priv->regs->status); + + serio_interrupt(priv->io, data, rxflags); + + ret = IRQ_HANDLED; + } + + return ret; +} + +static int apbps2_write(struct serio *io, unsigned char val) +{ + struct apbps2_priv *priv = io->port_data; + unsigned int tleft = 10000; /* timeout in 100ms */ + + /* delay until PS/2 controller has room for more chars */ + while ((ioread32be(&priv->regs->status) & APBPS2_STATUS_TF) && tleft--) + udelay(10); + + if ((ioread32be(&priv->regs->status) & APBPS2_STATUS_TF) == 0) { + iowrite32be(val, &priv->regs->data); + + iowrite32be(APBPS2_CTRL_RE | APBPS2_CTRL_RI | APBPS2_CTRL_TE, + &priv->regs->ctrl); + return 0; + } + + return -ETIMEDOUT; +} + +static int apbps2_open(struct serio *io) +{ + struct apbps2_priv *priv = io->port_data; + int limit; + + /* clear error flags */ + iowrite32be(0, &priv->regs->status); + + /* Clear old data if available (unlikely) */ + limit = 1024; + while ((ioread32be(&priv->regs->status) & APBPS2_STATUS_DR) && --limit) + ioread32be(&priv->regs->data); + + /* Enable reciever and it's interrupt */ + iowrite32be(APBPS2_CTRL_RE | APBPS2_CTRL_RI, &priv->regs->ctrl); + + return 0; +} + +static void apbps2_close(struct serio *io) +{ + struct apbps2_priv *priv = io->port_data; + + /* stop interrupts at PS/2 HW level */ + iowrite32be(0, &priv->regs->ctrl); +} + +/* Initialize one APBPS2 PS/2 core */ +static int apbps2_of_probe(struct platform_device *ofdev) +{ + struct apbps2_priv *priv; + int irq, err; + u32 freq_hz; + struct resource *res; + + priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + dev_err(&ofdev->dev, "memory allocation failed\n"); + return -ENOMEM; + } + + /* Find Device Address */ + res = platform_get_resource(ofdev, IORESOURCE_MEM, 0); + priv->regs = devm_ioremap_resource(&ofdev->dev, res); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + /* Reset hardware, disable interrupt */ + iowrite32be(0, &priv->regs->ctrl); + + /* IRQ */ + irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); + err = devm_request_irq(&ofdev->dev, irq, apbps2_isr, + IRQF_SHARED, "apbps2", priv); + if (err) { + dev_err(&ofdev->dev, "request IRQ%d failed\n", irq); + return err; + } + + /* Get core frequency */ + if (of_property_read_u32(ofdev->dev.of_node, "freq", &freq_hz)) { + dev_err(&ofdev->dev, "unable to get core frequency\n"); + return -EINVAL; + } + + /* Set reload register to core freq in kHz/10 */ + iowrite32be(freq_hz / 10000, &priv->regs->reload); + + priv->io = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!priv->io) + return -ENOMEM; + + priv->io->id.type = SERIO_8042; + priv->io->open = apbps2_open; + priv->io->close = apbps2_close; + priv->io->write = apbps2_write; + priv->io->port_data = priv; + strscpy(priv->io->name, "APBPS2 PS/2", sizeof(priv->io->name)); + snprintf(priv->io->phys, sizeof(priv->io->phys), + "apbps2_%d", apbps2_idx++); + + dev_info(&ofdev->dev, "irq = %d, base = 0x%p\n", irq, priv->regs); + + serio_register_port(priv->io); + + platform_set_drvdata(ofdev, priv); + + return 0; +} + +static int apbps2_of_remove(struct platform_device *of_dev) +{ + struct apbps2_priv *priv = platform_get_drvdata(of_dev); + + serio_unregister_port(priv->io); + + return 0; +} + +static const struct of_device_id apbps2_of_match[] = { + { .name = "GAISLER_APBPS2", }, + { .name = "01_060", }, + {} +}; + +MODULE_DEVICE_TABLE(of, apbps2_of_match); + +static struct platform_driver apbps2_of_driver = { + .driver = { + .name = "grlib-apbps2", + .of_match_table = apbps2_of_match, + }, + .probe = apbps2_of_probe, + .remove = apbps2_of_remove, +}; + +module_platform_driver(apbps2_of_driver); + +MODULE_AUTHOR("Aeroflex Gaisler AB."); +MODULE_DESCRIPTION("GRLIB APBPS2 PS/2 serial I/O"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/serio/arc_ps2.c b/drivers/input/serio/arc_ps2.c new file mode 100644 index 000000000..0af9fba5d --- /dev/null +++ b/drivers/input/serio/arc_ps2.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * Driver is originally developed by Pavel Sokolov <psokolov@synopsys.com> + */ + +#include <linux/err.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/serio.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/slab.h> + +#define ARC_PS2_PORTS 2 + +#define ARC_ARC_PS2_ID 0x0001f609 + +#define STAT_TIMEOUT 128 + +#define PS2_STAT_RX_FRM_ERR (1) +#define PS2_STAT_RX_BUF_OVER (1 << 1) +#define PS2_STAT_RX_INT_EN (1 << 2) +#define PS2_STAT_RX_VAL (1 << 3) +#define PS2_STAT_TX_ISNOT_FUL (1 << 4) +#define PS2_STAT_TX_INT_EN (1 << 5) + +struct arc_ps2_port { + void __iomem *data_addr; + void __iomem *status_addr; + struct serio *io; +}; + +struct arc_ps2_data { + struct arc_ps2_port port[ARC_PS2_PORTS]; + void __iomem *addr; + unsigned int frame_error; + unsigned int buf_overflow; + unsigned int total_int; +}; + +static void arc_ps2_check_rx(struct arc_ps2_data *arc_ps2, + struct arc_ps2_port *port) +{ + unsigned int timeout = 1000; + unsigned int flag, status; + unsigned char data; + + do { + status = ioread32(port->status_addr); + if (!(status & PS2_STAT_RX_VAL)) + return; + + data = ioread32(port->data_addr) & 0xff; + + flag = 0; + arc_ps2->total_int++; + if (status & PS2_STAT_RX_FRM_ERR) { + arc_ps2->frame_error++; + flag |= SERIO_PARITY; + } else if (status & PS2_STAT_RX_BUF_OVER) { + arc_ps2->buf_overflow++; + flag |= SERIO_FRAME; + } + + serio_interrupt(port->io, data, flag); + } while (--timeout); + + dev_err(&port->io->dev, "PS/2 hardware stuck\n"); +} + +static irqreturn_t arc_ps2_interrupt(int irq, void *dev) +{ + struct arc_ps2_data *arc_ps2 = dev; + int i; + + for (i = 0; i < ARC_PS2_PORTS; i++) + arc_ps2_check_rx(arc_ps2, &arc_ps2->port[i]); + + return IRQ_HANDLED; +} + +static int arc_ps2_write(struct serio *io, unsigned char val) +{ + unsigned status; + struct arc_ps2_port *port = io->port_data; + int timeout = STAT_TIMEOUT; + + do { + status = ioread32(port->status_addr); + cpu_relax(); + + if (status & PS2_STAT_TX_ISNOT_FUL) { + iowrite32(val & 0xff, port->data_addr); + return 0; + } + + } while (--timeout); + + dev_err(&io->dev, "write timeout\n"); + return -ETIMEDOUT; +} + +static int arc_ps2_open(struct serio *io) +{ + struct arc_ps2_port *port = io->port_data; + + iowrite32(PS2_STAT_RX_INT_EN, port->status_addr); + + return 0; +} + +static void arc_ps2_close(struct serio *io) +{ + struct arc_ps2_port *port = io->port_data; + + iowrite32(ioread32(port->status_addr) & ~PS2_STAT_RX_INT_EN, + port->status_addr); +} + +static void __iomem *arc_ps2_calc_addr(struct arc_ps2_data *arc_ps2, + int index, bool status) +{ + void __iomem *addr; + + addr = arc_ps2->addr + 4 + 4 * index; + if (status) + addr += ARC_PS2_PORTS * 4; + + return addr; +} + +static void arc_ps2_inhibit_ports(struct arc_ps2_data *arc_ps2) +{ + void __iomem *addr; + u32 val; + int i; + + for (i = 0; i < ARC_PS2_PORTS; i++) { + addr = arc_ps2_calc_addr(arc_ps2, i, true); + val = ioread32(addr); + val &= ~(PS2_STAT_RX_INT_EN | PS2_STAT_TX_INT_EN); + iowrite32(val, addr); + } +} + +static int arc_ps2_create_port(struct platform_device *pdev, + struct arc_ps2_data *arc_ps2, + int index) +{ + struct arc_ps2_port *port = &arc_ps2->port[index]; + struct serio *io; + + io = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!io) + return -ENOMEM; + + io->id.type = SERIO_8042; + io->write = arc_ps2_write; + io->open = arc_ps2_open; + io->close = arc_ps2_close; + snprintf(io->name, sizeof(io->name), "ARC PS/2 port%d", index); + snprintf(io->phys, sizeof(io->phys), "arc/serio%d", index); + io->port_data = port; + + port->io = io; + + port->data_addr = arc_ps2_calc_addr(arc_ps2, index, false); + port->status_addr = arc_ps2_calc_addr(arc_ps2, index, true); + + dev_dbg(&pdev->dev, "port%d is allocated (data = 0x%p, status = 0x%p)\n", + index, port->data_addr, port->status_addr); + + serio_register_port(port->io); + return 0; +} + +static int arc_ps2_probe(struct platform_device *pdev) +{ + struct arc_ps2_data *arc_ps2; + struct resource *res; + int irq; + int error, id, i; + + irq = platform_get_irq_byname(pdev, "arc_ps2_irq"); + if (irq < 0) + return -EINVAL; + + arc_ps2 = devm_kzalloc(&pdev->dev, sizeof(struct arc_ps2_data), + GFP_KERNEL); + if (!arc_ps2) { + dev_err(&pdev->dev, "out of memory\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + arc_ps2->addr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(arc_ps2->addr)) + return PTR_ERR(arc_ps2->addr); + + dev_info(&pdev->dev, "irq = %d, address = 0x%p, ports = %i\n", + irq, arc_ps2->addr, ARC_PS2_PORTS); + + id = ioread32(arc_ps2->addr); + if (id != ARC_ARC_PS2_ID) { + dev_err(&pdev->dev, "device id does not match\n"); + return -ENXIO; + } + + arc_ps2_inhibit_ports(arc_ps2); + + error = devm_request_irq(&pdev->dev, irq, arc_ps2_interrupt, + 0, "arc_ps2", arc_ps2); + if (error) { + dev_err(&pdev->dev, "Could not allocate IRQ\n"); + return error; + } + + for (i = 0; i < ARC_PS2_PORTS; i++) { + error = arc_ps2_create_port(pdev, arc_ps2, i); + if (error) { + while (--i >= 0) + serio_unregister_port(arc_ps2->port[i].io); + return error; + } + } + + platform_set_drvdata(pdev, arc_ps2); + + return 0; +} + +static int arc_ps2_remove(struct platform_device *pdev) +{ + struct arc_ps2_data *arc_ps2 = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < ARC_PS2_PORTS; i++) + serio_unregister_port(arc_ps2->port[i].io); + + dev_dbg(&pdev->dev, "interrupt count = %i\n", arc_ps2->total_int); + dev_dbg(&pdev->dev, "frame error count = %i\n", arc_ps2->frame_error); + dev_dbg(&pdev->dev, "buffer overflow count = %i\n", + arc_ps2->buf_overflow); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id arc_ps2_match[] = { + { .compatible = "snps,arc_ps2" }, + { }, +}; +MODULE_DEVICE_TABLE(of, arc_ps2_match); +#endif + +static struct platform_driver arc_ps2_driver = { + .driver = { + .name = "arc_ps2", + .of_match_table = of_match_ptr(arc_ps2_match), + }, + .probe = arc_ps2_probe, + .remove = arc_ps2_remove, +}; + +module_platform_driver(arc_ps2_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Pavel Sokolov <psokolov@synopsys.com>"); +MODULE_DESCRIPTION("ARC PS/2 Driver"); diff --git a/drivers/input/serio/ct82c710.c b/drivers/input/serio/ct82c710.c new file mode 100644 index 000000000..3da751f4a --- /dev/null +++ b/drivers/input/serio/ct82c710.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 1999-2001 Vojtech Pavlik + */ + +/* + * 82C710 C&T mouse port chip driver for Linux + */ + +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <asm/io.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("82C710 C&T mouse port chip driver"); +MODULE_LICENSE("GPL"); + +/* + * ct82c710 interface + */ + +#define CT82C710_DEV_IDLE 0x01 /* Device Idle */ +#define CT82C710_RX_FULL 0x02 /* Device Char received */ +#define CT82C710_TX_IDLE 0x04 /* Device XMIT Idle */ +#define CT82C710_RESET 0x08 /* Device Reset */ +#define CT82C710_INTS_ON 0x10 /* Device Interrupt On */ +#define CT82C710_ERROR_FLAG 0x20 /* Device Error */ +#define CT82C710_CLEAR 0x40 /* Device Clear */ +#define CT82C710_ENABLE 0x80 /* Device Enable */ + +#define CT82C710_IRQ 12 + +#define CT82C710_DATA ct82c710_iores.start +#define CT82C710_STATUS (ct82c710_iores.start + 1) + +static struct serio *ct82c710_port; +static struct platform_device *ct82c710_device; +static struct resource ct82c710_iores; + +/* + * Interrupt handler for the 82C710 mouse port. A character + * is waiting in the 82C710. + */ + +static irqreturn_t ct82c710_interrupt(int cpl, void *dev_id) +{ + return serio_interrupt(ct82c710_port, inb(CT82C710_DATA), 0); +} + +/* + * Wait for device to send output char and flush any input char. + */ + +static int ct82c170_wait(void) +{ + int timeout = 60000; + + while ((inb(CT82C710_STATUS) & (CT82C710_RX_FULL | CT82C710_TX_IDLE | CT82C710_DEV_IDLE)) + != (CT82C710_DEV_IDLE | CT82C710_TX_IDLE) && timeout) { + + if (inb_p(CT82C710_STATUS) & CT82C710_RX_FULL) inb_p(CT82C710_DATA); + + udelay(1); + timeout--; + } + + return !timeout; +} + +static void ct82c710_close(struct serio *serio) +{ + if (ct82c170_wait()) + printk(KERN_WARNING "ct82c710.c: Device busy in close()\n"); + + outb_p(inb_p(CT82C710_STATUS) & ~(CT82C710_ENABLE | CT82C710_INTS_ON), CT82C710_STATUS); + + if (ct82c170_wait()) + printk(KERN_WARNING "ct82c710.c: Device busy in close()\n"); + + free_irq(CT82C710_IRQ, NULL); +} + +static int ct82c710_open(struct serio *serio) +{ + unsigned char status; + int err; + + err = request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL); + if (err) + return err; + + status = inb_p(CT82C710_STATUS); + + status |= (CT82C710_ENABLE | CT82C710_RESET); + outb_p(status, CT82C710_STATUS); + + status &= ~(CT82C710_RESET); + outb_p(status, CT82C710_STATUS); + + status |= CT82C710_INTS_ON; + outb_p(status, CT82C710_STATUS); /* Enable interrupts */ + + while (ct82c170_wait()) { + printk(KERN_ERR "ct82c710: Device busy in open()\n"); + status &= ~(CT82C710_ENABLE | CT82C710_INTS_ON); + outb_p(status, CT82C710_STATUS); + free_irq(CT82C710_IRQ, NULL); + return -EBUSY; + } + + return 0; +} + +/* + * Write to the 82C710 mouse device. + */ + +static int ct82c710_write(struct serio *port, unsigned char c) +{ + if (ct82c170_wait()) return -1; + outb_p(c, CT82C710_DATA); + return 0; +} + +/* + * See if we can find a 82C710 device. Read mouse address. + */ + +static int __init ct82c710_detect(void) +{ + outb_p(0x55, 0x2fa); /* Any value except 9, ff or 36 */ + outb_p(0xaa, 0x3fa); /* Inverse of 55 */ + outb_p(0x36, 0x3fa); /* Address the chip */ + outb_p(0xe4, 0x3fa); /* 390/4; 390 = config address */ + outb_p(0x1b, 0x2fa); /* Inverse of e4 */ + outb_p(0x0f, 0x390); /* Write index */ + if (inb_p(0x391) != 0xe4) /* Config address found? */ + return -ENODEV; /* No: no 82C710 here */ + + outb_p(0x0d, 0x390); /* Write index */ + ct82c710_iores.start = inb_p(0x391) << 2; /* Get mouse I/O address */ + ct82c710_iores.end = ct82c710_iores.start + 1; + ct82c710_iores.flags = IORESOURCE_IO; + outb_p(0x0f, 0x390); + outb_p(0x0f, 0x391); /* Close config mode */ + + return 0; +} + +static int ct82c710_probe(struct platform_device *dev) +{ + ct82c710_port = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!ct82c710_port) + return -ENOMEM; + + ct82c710_port->id.type = SERIO_8042; + ct82c710_port->dev.parent = &dev->dev; + ct82c710_port->open = ct82c710_open; + ct82c710_port->close = ct82c710_close; + ct82c710_port->write = ct82c710_write; + strscpy(ct82c710_port->name, "C&T 82c710 mouse port", + sizeof(ct82c710_port->name)); + snprintf(ct82c710_port->phys, sizeof(ct82c710_port->phys), + "isa%16llx/serio0", (unsigned long long)CT82C710_DATA); + + serio_register_port(ct82c710_port); + + printk(KERN_INFO "serio: C&T 82c710 mouse port at %#llx irq %d\n", + (unsigned long long)CT82C710_DATA, CT82C710_IRQ); + + return 0; +} + +static int ct82c710_remove(struct platform_device *dev) +{ + serio_unregister_port(ct82c710_port); + + return 0; +} + +static struct platform_driver ct82c710_driver = { + .driver = { + .name = "ct82c710", + }, + .probe = ct82c710_probe, + .remove = ct82c710_remove, +}; + + +static int __init ct82c710_init(void) +{ + int error; + + error = ct82c710_detect(); + if (error) + return error; + + error = platform_driver_register(&ct82c710_driver); + if (error) + return error; + + ct82c710_device = platform_device_alloc("ct82c710", -1); + if (!ct82c710_device) { + error = -ENOMEM; + goto err_unregister_driver; + } + + error = platform_device_add_resources(ct82c710_device, &ct82c710_iores, 1); + if (error) + goto err_free_device; + + error = platform_device_add(ct82c710_device); + if (error) + goto err_free_device; + + return 0; + + err_free_device: + platform_device_put(ct82c710_device); + err_unregister_driver: + platform_driver_unregister(&ct82c710_driver); + return error; +} + +static void __exit ct82c710_exit(void) +{ + platform_device_unregister(ct82c710_device); + platform_driver_unregister(&ct82c710_driver); +} + +module_init(ct82c710_init); +module_exit(ct82c710_exit); diff --git a/drivers/input/serio/gscps2.c b/drivers/input/serio/gscps2.c new file mode 100644 index 000000000..633c7de49 --- /dev/null +++ b/drivers/input/serio/gscps2.c @@ -0,0 +1,465 @@ +/* + * drivers/input/serio/gscps2.c + * + * Copyright (c) 2004-2006 Helge Deller <deller@gmx.de> + * Copyright (c) 2002 Laurent Canet <canetl@esiee.fr> + * Copyright (c) 2002 Thibaut Varene <varenet@parisc-linux.org> + * + * Pieces of code based on linux-2.4's hp_mouse.c & hp_keyb.c + * Copyright (c) 1999 Alex deVries <alex@onefishtwo.ca> + * Copyright (c) 1999-2000 Philipp Rumpf <prumpf@tux.org> + * Copyright (c) 2000 Xavier Debacker <debackex@esiee.fr> + * Copyright (c) 2000-2001 Thomas Marteau <marteaut@esiee.fr> + * + * HP GSC PS/2 port driver, found in PA/RISC Workstations + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * TODO: + * - Dino testing (did HP ever shipped a machine on which this port + * was usable/enabled ?) + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/serio.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <linux/ioport.h> + +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/parisc-device.h> + +MODULE_AUTHOR("Laurent Canet <canetl@esiee.fr>, Thibaut Varene <varenet@parisc-linux.org>, Helge Deller <deller@gmx.de>"); +MODULE_DESCRIPTION("HP GSC PS2 port driver"); +MODULE_LICENSE("GPL"); + +#define PFX "gscps2.c: " + +/* + * Driver constants + */ + +/* various constants */ +#define ENABLE 1 +#define DISABLE 0 + +#define GSC_DINO_OFFSET 0x0800 /* offset for DINO controller versus LASI one */ + +/* PS/2 IO port offsets */ +#define GSC_ID 0x00 /* device ID offset (see: GSC_ID_XXX) */ +#define GSC_RESET 0x00 /* reset port offset */ +#define GSC_RCVDATA 0x04 /* receive port offset */ +#define GSC_XMTDATA 0x04 /* transmit port offset */ +#define GSC_CONTROL 0x08 /* see: Control register bits */ +#define GSC_STATUS 0x0C /* see: Status register bits */ + +/* Control register bits */ +#define GSC_CTRL_ENBL 0x01 /* enable interface */ +#define GSC_CTRL_LPBXR 0x02 /* loopback operation */ +#define GSC_CTRL_DIAG 0x20 /* directly control clock/data line */ +#define GSC_CTRL_DATDIR 0x40 /* data line direct control */ +#define GSC_CTRL_CLKDIR 0x80 /* clock line direct control */ + +/* Status register bits */ +#define GSC_STAT_RBNE 0x01 /* Receive Buffer Not Empty */ +#define GSC_STAT_TBNE 0x02 /* Transmit Buffer Not Empty */ +#define GSC_STAT_TERR 0x04 /* Timeout Error */ +#define GSC_STAT_PERR 0x08 /* Parity Error */ +#define GSC_STAT_CMPINTR 0x10 /* Composite Interrupt = irq on any port */ +#define GSC_STAT_DATSHD 0x40 /* Data Line Shadow */ +#define GSC_STAT_CLKSHD 0x80 /* Clock Line Shadow */ + +/* IDs returned by GSC_ID port register */ +#define GSC_ID_KEYBOARD 0 /* device ID values */ +#define GSC_ID_MOUSE 1 + + +static irqreturn_t gscps2_interrupt(int irq, void *dev); + +#define BUFFER_SIZE 0x0f + +/* GSC PS/2 port device struct */ +struct gscps2port { + struct list_head node; + struct parisc_device *padev; + struct serio *port; + spinlock_t lock; + char __iomem *addr; + u8 act, append; /* position in buffer[] */ + struct { + u8 data; + u8 str; + } buffer[BUFFER_SIZE+1]; + int id; +}; + +/* + * Various HW level routines + */ + +#define gscps2_readb_input(x) readb((x)+GSC_RCVDATA) +#define gscps2_readb_control(x) readb((x)+GSC_CONTROL) +#define gscps2_readb_status(x) readb((x)+GSC_STATUS) +#define gscps2_writeb_control(x, y) writeb((x), (y)+GSC_CONTROL) + + +/* + * wait_TBE() - wait for Transmit Buffer Empty + */ + +static int wait_TBE(char __iomem *addr) +{ + int timeout = 25000; /* device is expected to react within 250 msec */ + while (gscps2_readb_status(addr) & GSC_STAT_TBNE) { + if (!--timeout) + return 0; /* This should not happen */ + udelay(10); + } + return 1; +} + + +/* + * gscps2_flush() - flush the receive buffer + */ + +static void gscps2_flush(struct gscps2port *ps2port) +{ + while (gscps2_readb_status(ps2port->addr) & GSC_STAT_RBNE) + gscps2_readb_input(ps2port->addr); + ps2port->act = ps2port->append = 0; +} + +/* + * gscps2_writeb_output() - write a byte to the port + * + * returns 1 on success, 0 on error + */ + +static inline int gscps2_writeb_output(struct gscps2port *ps2port, u8 data) +{ + unsigned long flags; + char __iomem *addr = ps2port->addr; + + if (!wait_TBE(addr)) { + printk(KERN_DEBUG PFX "timeout - could not write byte %#x\n", data); + return 0; + } + + while (gscps2_readb_status(addr) & GSC_STAT_RBNE) + /* wait */; + + spin_lock_irqsave(&ps2port->lock, flags); + writeb(data, addr+GSC_XMTDATA); + spin_unlock_irqrestore(&ps2port->lock, flags); + + /* this is ugly, but due to timing of the port it seems to be necessary. */ + mdelay(6); + + /* make sure any received data is returned as fast as possible */ + /* this is important e.g. when we set the LEDs on the keyboard */ + gscps2_interrupt(0, NULL); + + return 1; +} + + +/* + * gscps2_enable() - enables or disables the port + */ + +static void gscps2_enable(struct gscps2port *ps2port, int enable) +{ + unsigned long flags; + u8 data; + + /* now enable/disable the port */ + spin_lock_irqsave(&ps2port->lock, flags); + gscps2_flush(ps2port); + data = gscps2_readb_control(ps2port->addr); + if (enable) + data |= GSC_CTRL_ENBL; + else + data &= ~GSC_CTRL_ENBL; + gscps2_writeb_control(data, ps2port->addr); + spin_unlock_irqrestore(&ps2port->lock, flags); + wait_TBE(ps2port->addr); + gscps2_flush(ps2port); +} + +/* + * gscps2_reset() - resets the PS/2 port + */ + +static void gscps2_reset(struct gscps2port *ps2port) +{ + unsigned long flags; + + /* reset the interface */ + spin_lock_irqsave(&ps2port->lock, flags); + gscps2_flush(ps2port); + writeb(0xff, ps2port->addr + GSC_RESET); + gscps2_flush(ps2port); + spin_unlock_irqrestore(&ps2port->lock, flags); +} + +static LIST_HEAD(ps2port_list); + +/** + * gscps2_interrupt() - Interruption service routine + * + * This function reads received PS/2 bytes and processes them on + * all interfaces. + * The problematic part here is, that the keyboard and mouse PS/2 port + * share the same interrupt and it's not possible to send data if any + * one of them holds input data. To solve this problem we try to receive + * the data as fast as possible and handle the reporting to the upper layer + * later. + */ + +static irqreturn_t gscps2_interrupt(int irq, void *dev) +{ + struct gscps2port *ps2port; + + list_for_each_entry(ps2port, &ps2port_list, node) { + + unsigned long flags; + spin_lock_irqsave(&ps2port->lock, flags); + + while ( (ps2port->buffer[ps2port->append].str = + gscps2_readb_status(ps2port->addr)) & GSC_STAT_RBNE ) { + ps2port->buffer[ps2port->append].data = + gscps2_readb_input(ps2port->addr); + ps2port->append = ((ps2port->append+1) & BUFFER_SIZE); + } + + spin_unlock_irqrestore(&ps2port->lock, flags); + + } /* list_for_each_entry */ + + /* all data was read from the ports - now report the data to upper layer */ + + list_for_each_entry(ps2port, &ps2port_list, node) { + + while (ps2port->act != ps2port->append) { + + unsigned int rxflags; + u8 data, status; + + /* Did new data arrived while we read existing data ? + If yes, exit now and let the new irq handler start over again */ + if (gscps2_readb_status(ps2port->addr) & GSC_STAT_CMPINTR) + return IRQ_HANDLED; + + status = ps2port->buffer[ps2port->act].str; + data = ps2port->buffer[ps2port->act].data; + + ps2port->act = ((ps2port->act+1) & BUFFER_SIZE); + rxflags = ((status & GSC_STAT_TERR) ? SERIO_TIMEOUT : 0 ) | + ((status & GSC_STAT_PERR) ? SERIO_PARITY : 0 ); + + serio_interrupt(ps2port->port, data, rxflags); + + } /* while() */ + + } /* list_for_each_entry */ + + return IRQ_HANDLED; +} + + +/* + * gscps2_write() - send a byte out through the aux interface. + */ + +static int gscps2_write(struct serio *port, unsigned char data) +{ + struct gscps2port *ps2port = port->port_data; + + if (!gscps2_writeb_output(ps2port, data)) { + printk(KERN_DEBUG PFX "sending byte %#x failed.\n", data); + return -1; + } + return 0; +} + +/* + * gscps2_open() is called when a port is opened by the higher layer. + * It resets and enables the port. + */ + +static int gscps2_open(struct serio *port) +{ + struct gscps2port *ps2port = port->port_data; + + gscps2_reset(ps2port); + + /* enable it */ + gscps2_enable(ps2port, ENABLE); + + gscps2_interrupt(0, NULL); + + return 0; +} + +/* + * gscps2_close() disables the port + */ + +static void gscps2_close(struct serio *port) +{ + struct gscps2port *ps2port = port->port_data; + gscps2_enable(ps2port, DISABLE); +} + +/** + * gscps2_probe() - Probes PS2 devices + * @return: success/error report + */ + +static int __init gscps2_probe(struct parisc_device *dev) +{ + struct gscps2port *ps2port; + struct serio *serio; + unsigned long hpa = dev->hpa.start; + int ret; + + if (!dev->irq) + return -ENODEV; + + /* Offset for DINO PS/2. Works with LASI even */ + if (dev->id.sversion == 0x96) + hpa += GSC_DINO_OFFSET; + + ps2port = kzalloc(sizeof(struct gscps2port), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!ps2port || !serio) { + ret = -ENOMEM; + goto fail_nomem; + } + + dev_set_drvdata(&dev->dev, ps2port); + + ps2port->port = serio; + ps2port->padev = dev; + ps2port->addr = ioremap(hpa, GSC_STATUS + 4); + if (!ps2port->addr) { + ret = -ENOMEM; + goto fail_nomem; + } + spin_lock_init(&ps2port->lock); + + gscps2_reset(ps2port); + ps2port->id = readb(ps2port->addr + GSC_ID) & 0x0f; + + snprintf(serio->name, sizeof(serio->name), "gsc-ps2-%s", + (ps2port->id == GSC_ID_KEYBOARD) ? "keyboard" : "mouse"); + strscpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys)); + serio->id.type = SERIO_8042; + serio->write = gscps2_write; + serio->open = gscps2_open; + serio->close = gscps2_close; + serio->port_data = ps2port; + serio->dev.parent = &dev->dev; + + ret = -EBUSY; + if (request_irq(dev->irq, gscps2_interrupt, IRQF_SHARED, ps2port->port->name, ps2port)) + goto fail_miserably; + + if (ps2port->id != GSC_ID_KEYBOARD && ps2port->id != GSC_ID_MOUSE) { + printk(KERN_WARNING PFX "Unsupported PS/2 port at 0x%08lx (id=%d) ignored\n", + hpa, ps2port->id); + ret = -ENODEV; + goto fail; + } + +#if 0 + if (!request_mem_region(hpa, GSC_STATUS + 4, ps2port->port.name)) + goto fail; +#endif + + pr_info("serio: %s port at 0x%08lx irq %d @ %s\n", + ps2port->port->name, + hpa, + ps2port->padev->irq, + ps2port->port->phys); + + serio_register_port(ps2port->port); + + list_add_tail(&ps2port->node, &ps2port_list); + + return 0; + +fail: + free_irq(dev->irq, ps2port); + +fail_miserably: + iounmap(ps2port->addr); + release_mem_region(dev->hpa.start, GSC_STATUS + 4); + +fail_nomem: + kfree(ps2port); + kfree(serio); + return ret; +} + +/** + * gscps2_remove() - Removes PS2 devices + * @return: success/error report + */ + +static void __exit gscps2_remove(struct parisc_device *dev) +{ + struct gscps2port *ps2port = dev_get_drvdata(&dev->dev); + + serio_unregister_port(ps2port->port); + free_irq(dev->irq, ps2port); + gscps2_flush(ps2port); + list_del(&ps2port->node); + iounmap(ps2port->addr); +#if 0 + release_mem_region(dev->hpa, GSC_STATUS + 4); +#endif + dev_set_drvdata(&dev->dev, NULL); + kfree(ps2port); +} + + +static const struct parisc_device_id gscps2_device_tbl[] __initconst = { + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00084 }, /* LASI PS/2 */ +#ifdef DINO_TESTED + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00096 }, /* DINO PS/2 */ +#endif + { 0, } /* 0 terminated list */ +}; +MODULE_DEVICE_TABLE(parisc, gscps2_device_tbl); + +static struct parisc_driver parisc_ps2_driver __refdata = { + .name = "gsc_ps2", + .id_table = gscps2_device_tbl, + .probe = gscps2_probe, + .remove = __exit_p(gscps2_remove), +}; + +static int __init gscps2_init(void) +{ + register_parisc_driver(&parisc_ps2_driver); + return 0; +} + +static void __exit gscps2_exit(void) +{ + unregister_parisc_driver(&parisc_ps2_driver); +} + + +module_init(gscps2_init); +module_exit(gscps2_exit); + diff --git a/drivers/input/serio/hil_mlc.c b/drivers/input/serio/hil_mlc.c new file mode 100644 index 000000000..d36e89d6f --- /dev/null +++ b/drivers/input/serio/hil_mlc.c @@ -0,0 +1,1025 @@ +/* + * HIL MLC state machine and serio interface driver + * + * Copyright (c) 2001 Brian S. Julin + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * + * References: + * HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A + * + * + * Driver theory of operation: + * + * Some access methods and an ISR is defined by the sub-driver + * (e.g. hp_sdc_mlc.c). These methods are expected to provide a + * few bits of logic in addition to raw access to the HIL MLC, + * specifically, the ISR, which is entirely registered by the + * sub-driver and invoked directly, must check for record + * termination or packet match, at which point a semaphore must + * be cleared and then the hil_mlcs_tasklet must be scheduled. + * + * The hil_mlcs_tasklet processes the state machine for all MLCs + * each time it runs, checking each MLC's progress at the current + * node in the state machine, and moving the MLC to subsequent nodes + * in the state machine when appropriate. It will reschedule + * itself if output is pending. (This rescheduling should be replaced + * at some point with a sub-driver-specific mechanism.) + * + * A timer task prods the tasklet once per second to prevent + * hangups when attached devices do not return expected data + * and to initiate probes of the loop for new devices. + */ + +#include <linux/hil_mlc.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/timer.h> +#include <linux/list.h> + +MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); +MODULE_DESCRIPTION("HIL MLC serio"); +MODULE_LICENSE("Dual BSD/GPL"); + +EXPORT_SYMBOL(hil_mlc_register); +EXPORT_SYMBOL(hil_mlc_unregister); + +#define PREFIX "HIL MLC: " + +static LIST_HEAD(hil_mlcs); +static DEFINE_RWLOCK(hil_mlcs_lock); +static struct timer_list hil_mlcs_kicker; +static int hil_mlcs_probe, hil_mlc_stop; + +static void hil_mlcs_process(unsigned long unused); +static DECLARE_TASKLET_DISABLED_OLD(hil_mlcs_tasklet, hil_mlcs_process); + + +/* #define HIL_MLC_DEBUG */ + +/********************** Device info/instance management **********************/ + +static void hil_mlc_clear_di_map(hil_mlc *mlc, int val) +{ + int j; + + for (j = val; j < 7 ; j++) + mlc->di_map[j] = -1; +} + +static void hil_mlc_clear_di_scratch(hil_mlc *mlc) +{ + memset(&mlc->di_scratch, 0, sizeof(mlc->di_scratch)); +} + +static void hil_mlc_copy_di_scratch(hil_mlc *mlc, int idx) +{ + memcpy(&mlc->di[idx], &mlc->di_scratch, sizeof(mlc->di_scratch)); +} + +static int hil_mlc_match_di_scratch(hil_mlc *mlc) +{ + int idx; + + for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) { + int j, found = 0; + + /* In-use slots are not eligible. */ + for (j = 0; j < 7 ; j++) + if (mlc->di_map[j] == idx) + found++; + + if (found) + continue; + + if (!memcmp(mlc->di + idx, &mlc->di_scratch, + sizeof(mlc->di_scratch))) + break; + } + return idx >= HIL_MLC_DEVMEM ? -1 : idx; +} + +static int hil_mlc_find_free_di(hil_mlc *mlc) +{ + int idx; + + /* TODO: Pick all-zero slots first, failing that, + * randomize the slot picked among those eligible. + */ + for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) { + int j, found = 0; + + for (j = 0; j < 7 ; j++) + if (mlc->di_map[j] == idx) + found++; + + if (!found) + break; + } + + return idx; /* Note: It is guaranteed at least one above will match */ +} + +static inline void hil_mlc_clean_serio_map(hil_mlc *mlc) +{ + int idx; + + for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) { + int j, found = 0; + + for (j = 0; j < 7 ; j++) + if (mlc->di_map[j] == idx) + found++; + + if (!found) + mlc->serio_map[idx].di_revmap = -1; + } +} + +static void hil_mlc_send_polls(hil_mlc *mlc) +{ + int did, i, cnt; + struct serio *serio; + struct serio_driver *drv; + + i = cnt = 0; + did = (mlc->ipacket[0] & HIL_PKT_ADDR_MASK) >> 8; + serio = did ? mlc->serio[mlc->di_map[did - 1]] : NULL; + drv = (serio != NULL) ? serio->drv : NULL; + + while (mlc->icount < 15 - i) { + hil_packet p; + + p = mlc->ipacket[i]; + if (did != (p & HIL_PKT_ADDR_MASK) >> 8) { + if (drv && drv->interrupt) { + drv->interrupt(serio, 0, 0); + drv->interrupt(serio, HIL_ERR_INT >> 16, 0); + drv->interrupt(serio, HIL_PKT_CMD >> 8, 0); + drv->interrupt(serio, HIL_CMD_POL + cnt, 0); + } + + did = (p & HIL_PKT_ADDR_MASK) >> 8; + serio = did ? mlc->serio[mlc->di_map[did-1]] : NULL; + drv = (serio != NULL) ? serio->drv : NULL; + cnt = 0; + } + + cnt++; + i++; + + if (drv && drv->interrupt) { + drv->interrupt(serio, (p >> 24), 0); + drv->interrupt(serio, (p >> 16) & 0xff, 0); + drv->interrupt(serio, (p >> 8) & ~HIL_PKT_ADDR_MASK, 0); + drv->interrupt(serio, p & 0xff, 0); + } + } +} + +/*************************** State engine *********************************/ + +#define HILSEN_SCHED 0x000100 /* Schedule the tasklet */ +#define HILSEN_BREAK 0x000200 /* Wait until next pass */ +#define HILSEN_UP 0x000400 /* relative node#, decrement */ +#define HILSEN_DOWN 0x000800 /* relative node#, increment */ +#define HILSEN_FOLLOW 0x001000 /* use retval as next node# */ + +#define HILSEN_MASK 0x0000ff +#define HILSEN_START 0 +#define HILSEN_RESTART 1 +#define HILSEN_DHR 9 +#define HILSEN_DHR2 10 +#define HILSEN_IFC 14 +#define HILSEN_HEAL0 16 +#define HILSEN_HEAL 18 +#define HILSEN_ACF 21 +#define HILSEN_ACF2 22 +#define HILSEN_DISC0 25 +#define HILSEN_DISC 27 +#define HILSEN_MATCH 40 +#define HILSEN_OPERATE 41 +#define HILSEN_PROBE 44 +#define HILSEN_DSR 52 +#define HILSEN_REPOLL 55 +#define HILSEN_IFCACF 58 +#define HILSEN_END 60 + +#define HILSEN_NEXT (HILSEN_DOWN | 1) +#define HILSEN_SAME (HILSEN_DOWN | 0) +#define HILSEN_LAST (HILSEN_UP | 1) + +#define HILSEN_DOZE (HILSEN_SAME | HILSEN_SCHED | HILSEN_BREAK) +#define HILSEN_SLEEP (HILSEN_SAME | HILSEN_BREAK) + +static int hilse_match(hil_mlc *mlc, int unused) +{ + int rc; + + rc = hil_mlc_match_di_scratch(mlc); + if (rc == -1) { + rc = hil_mlc_find_free_di(mlc); + if (rc == -1) + goto err; + +#ifdef HIL_MLC_DEBUG + printk(KERN_DEBUG PREFIX "new in slot %i\n", rc); +#endif + hil_mlc_copy_di_scratch(mlc, rc); + mlc->di_map[mlc->ddi] = rc; + mlc->serio_map[rc].di_revmap = mlc->ddi; + hil_mlc_clean_serio_map(mlc); + serio_rescan(mlc->serio[rc]); + return -1; + } + + mlc->di_map[mlc->ddi] = rc; +#ifdef HIL_MLC_DEBUG + printk(KERN_DEBUG PREFIX "same in slot %i\n", rc); +#endif + mlc->serio_map[rc].di_revmap = mlc->ddi; + hil_mlc_clean_serio_map(mlc); + return 0; + + err: + printk(KERN_ERR PREFIX "Residual device slots exhausted, close some serios!\n"); + return 1; +} + +/* An LCV used to prevent runaway loops, forces 5 second sleep when reset. */ +static int hilse_init_lcv(hil_mlc *mlc, int unused) +{ + time64_t now = ktime_get_seconds(); + + if (mlc->lcv && (now - mlc->lcv_time) < 5) + return -1; + + mlc->lcv_time = now; + mlc->lcv = 0; + + return 0; +} + +static int hilse_inc_lcv(hil_mlc *mlc, int lim) +{ + return mlc->lcv++ >= lim ? -1 : 0; +} + +#if 0 +static int hilse_set_lcv(hil_mlc *mlc, int val) +{ + mlc->lcv = val; + + return 0; +} +#endif + +/* Management of the discovered device index (zero based, -1 means no devs) */ +static int hilse_set_ddi(hil_mlc *mlc, int val) +{ + mlc->ddi = val; + hil_mlc_clear_di_map(mlc, val + 1); + + return 0; +} + +static int hilse_dec_ddi(hil_mlc *mlc, int unused) +{ + mlc->ddi--; + if (mlc->ddi <= -1) { + mlc->ddi = -1; + hil_mlc_clear_di_map(mlc, 0); + return -1; + } + hil_mlc_clear_di_map(mlc, mlc->ddi + 1); + + return 0; +} + +static int hilse_inc_ddi(hil_mlc *mlc, int unused) +{ + BUG_ON(mlc->ddi >= 6); + mlc->ddi++; + + return 0; +} + +static int hilse_take_idd(hil_mlc *mlc, int unused) +{ + int i; + + /* Help the state engine: + * Is this a real IDD response or just an echo? + * + * Real IDD response does not start with a command. + */ + if (mlc->ipacket[0] & HIL_PKT_CMD) + goto bail; + + /* Should have the command echoed further down. */ + for (i = 1; i < 16; i++) { + if (((mlc->ipacket[i] & HIL_PKT_ADDR_MASK) == + (mlc->ipacket[0] & HIL_PKT_ADDR_MASK)) && + (mlc->ipacket[i] & HIL_PKT_CMD) && + ((mlc->ipacket[i] & HIL_PKT_DATA_MASK) == HIL_CMD_IDD)) + break; + } + if (i > 15) + goto bail; + + /* And the rest of the packets should still be clear. */ + while (++i < 16) + if (mlc->ipacket[i]) + break; + + if (i < 16) + goto bail; + + for (i = 0; i < 16; i++) + mlc->di_scratch.idd[i] = + mlc->ipacket[i] & HIL_PKT_DATA_MASK; + + /* Next step is to see if RSC supported */ + if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_RSC) + return HILSEN_NEXT; + + if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD) + return HILSEN_DOWN | 4; + + return 0; + + bail: + mlc->ddi--; + + return -1; /* This should send us off to ACF */ +} + +static int hilse_take_rsc(hil_mlc *mlc, int unused) +{ + int i; + + for (i = 0; i < 16; i++) + mlc->di_scratch.rsc[i] = + mlc->ipacket[i] & HIL_PKT_DATA_MASK; + + /* Next step is to see if EXD supported (IDD has already been read) */ + if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD) + return HILSEN_NEXT; + + return 0; +} + +static int hilse_take_exd(hil_mlc *mlc, int unused) +{ + int i; + + for (i = 0; i < 16; i++) + mlc->di_scratch.exd[i] = + mlc->ipacket[i] & HIL_PKT_DATA_MASK; + + /* Next step is to see if RNM supported. */ + if (mlc->di_scratch.exd[0] & HIL_EXD_HEADER_RNM) + return HILSEN_NEXT; + + return 0; +} + +static int hilse_take_rnm(hil_mlc *mlc, int unused) +{ + int i; + + for (i = 0; i < 16; i++) + mlc->di_scratch.rnm[i] = + mlc->ipacket[i] & HIL_PKT_DATA_MASK; + + printk(KERN_INFO PREFIX "Device name gotten: %16s\n", + mlc->di_scratch.rnm); + + return 0; +} + +static int hilse_operate(hil_mlc *mlc, int repoll) +{ + + if (mlc->opercnt == 0) + hil_mlcs_probe = 0; + mlc->opercnt = 1; + + hil_mlc_send_polls(mlc); + + if (!hil_mlcs_probe) + return 0; + hil_mlcs_probe = 0; + mlc->opercnt = 0; + return 1; +} + +#define FUNC(funct, funct_arg, zero_rc, neg_rc, pos_rc) \ +{ HILSE_FUNC, { .func = funct }, funct_arg, zero_rc, neg_rc, pos_rc }, +#define OUT(pack) \ +{ HILSE_OUT, { .packet = pack }, 0, HILSEN_NEXT, HILSEN_DOZE, 0 }, +#define CTS \ +{ HILSE_CTS, { .packet = 0 }, 0, HILSEN_NEXT | HILSEN_SCHED | HILSEN_BREAK, HILSEN_DOZE, 0 }, +#define EXPECT(comp, to, got, got_wrong, timed_out) \ +{ HILSE_EXPECT, { .packet = comp }, to, got, got_wrong, timed_out }, +#define EXPECT_LAST(comp, to, got, got_wrong, timed_out) \ +{ HILSE_EXPECT_LAST, { .packet = comp }, to, got, got_wrong, timed_out }, +#define EXPECT_DISC(comp, to, got, got_wrong, timed_out) \ +{ HILSE_EXPECT_DISC, { .packet = comp }, to, got, got_wrong, timed_out }, +#define IN(to, got, got_error, timed_out) \ +{ HILSE_IN, { .packet = 0 }, to, got, got_error, timed_out }, +#define OUT_DISC(pack) \ +{ HILSE_OUT_DISC, { .packet = pack }, 0, 0, 0, 0 }, +#define OUT_LAST(pack) \ +{ HILSE_OUT_LAST, { .packet = pack }, 0, 0, 0, 0 }, + +static const struct hilse_node hil_mlc_se[HILSEN_END] = { + + /* 0 HILSEN_START */ + FUNC(hilse_init_lcv, 0, HILSEN_NEXT, HILSEN_SLEEP, 0) + + /* 1 HILSEN_RESTART */ + FUNC(hilse_inc_lcv, 10, HILSEN_NEXT, HILSEN_START, 0) + OUT(HIL_CTRL_ONLY) /* Disable APE */ + CTS + +#define TEST_PACKET(x) \ +(HIL_PKT_CMD | (x << HIL_PKT_ADDR_SHIFT) | x << 4 | x) + + OUT(HIL_DO_ALTER_CTRL | HIL_CTRL_TEST | TEST_PACKET(0x5)) + EXPECT(HIL_ERR_INT | TEST_PACKET(0x5), + 2000, HILSEN_NEXT, HILSEN_RESTART, HILSEN_RESTART) + OUT(HIL_DO_ALTER_CTRL | HIL_CTRL_TEST | TEST_PACKET(0xa)) + EXPECT(HIL_ERR_INT | TEST_PACKET(0xa), + 2000, HILSEN_NEXT, HILSEN_RESTART, HILSEN_RESTART) + OUT(HIL_CTRL_ONLY | 0) /* Disable test mode */ + + /* 9 HILSEN_DHR */ + FUNC(hilse_init_lcv, 0, HILSEN_NEXT, HILSEN_SLEEP, 0) + + /* 10 HILSEN_DHR2 */ + FUNC(hilse_inc_lcv, 10, HILSEN_NEXT, HILSEN_START, 0) + FUNC(hilse_set_ddi, -1, HILSEN_NEXT, 0, 0) + OUT(HIL_PKT_CMD | HIL_CMD_DHR) + IN(300000, HILSEN_DHR2, HILSEN_DHR2, HILSEN_NEXT) + + /* 14 HILSEN_IFC */ + OUT(HIL_PKT_CMD | HIL_CMD_IFC) + EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT, + 20000, HILSEN_DISC, HILSEN_DHR2, HILSEN_NEXT ) + + /* If devices are there, they weren't in PUP or other loopback mode. + * We're more concerned at this point with restoring operation + * to devices than discovering new ones, so we try to salvage + * the loop configuration by closing off the loop. + */ + + /* 16 HILSEN_HEAL0 */ + FUNC(hilse_dec_ddi, 0, HILSEN_NEXT, HILSEN_ACF, 0) + FUNC(hilse_inc_ddi, 0, HILSEN_NEXT, 0, 0) + + /* 18 HILSEN_HEAL */ + OUT_LAST(HIL_CMD_ELB) + EXPECT_LAST(HIL_CMD_ELB | HIL_ERR_INT, + 20000, HILSEN_REPOLL, HILSEN_DSR, HILSEN_NEXT) + FUNC(hilse_dec_ddi, 0, HILSEN_HEAL, HILSEN_NEXT, 0) + + /* 21 HILSEN_ACF */ + FUNC(hilse_init_lcv, 0, HILSEN_NEXT, HILSEN_DOZE, 0) + + /* 22 HILSEN_ACF2 */ + FUNC(hilse_inc_lcv, 10, HILSEN_NEXT, HILSEN_START, 0) + OUT(HIL_PKT_CMD | HIL_CMD_ACF | 1) + IN(20000, HILSEN_NEXT, HILSEN_DSR, HILSEN_NEXT) + + /* 25 HILSEN_DISC0 */ + OUT_DISC(HIL_PKT_CMD | HIL_CMD_ELB) + EXPECT_DISC(HIL_PKT_CMD | HIL_CMD_ELB | HIL_ERR_INT, + 20000, HILSEN_NEXT, HILSEN_DSR, HILSEN_DSR) + + /* Only enter here if response just received */ + /* 27 HILSEN_DISC */ + OUT_DISC(HIL_PKT_CMD | HIL_CMD_IDD) + EXPECT_DISC(HIL_PKT_CMD | HIL_CMD_IDD | HIL_ERR_INT, + 20000, HILSEN_NEXT, HILSEN_DSR, HILSEN_START) + FUNC(hilse_inc_ddi, 0, HILSEN_NEXT, HILSEN_START, 0) + FUNC(hilse_take_idd, 0, HILSEN_MATCH, HILSEN_IFCACF, HILSEN_FOLLOW) + OUT_LAST(HIL_PKT_CMD | HIL_CMD_RSC) + EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_RSC | HIL_ERR_INT, + 30000, HILSEN_NEXT, HILSEN_DSR, HILSEN_DSR) + FUNC(hilse_take_rsc, 0, HILSEN_MATCH, 0, HILSEN_FOLLOW) + OUT_LAST(HIL_PKT_CMD | HIL_CMD_EXD) + EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_EXD | HIL_ERR_INT, + 30000, HILSEN_NEXT, HILSEN_DSR, HILSEN_DSR) + FUNC(hilse_take_exd, 0, HILSEN_MATCH, 0, HILSEN_FOLLOW) + OUT_LAST(HIL_PKT_CMD | HIL_CMD_RNM) + EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_RNM | HIL_ERR_INT, + 30000, HILSEN_NEXT, HILSEN_DSR, HILSEN_DSR) + FUNC(hilse_take_rnm, 0, HILSEN_MATCH, 0, 0) + + /* 40 HILSEN_MATCH */ + FUNC(hilse_match, 0, HILSEN_NEXT, HILSEN_NEXT, /* TODO */ 0) + + /* 41 HILSEN_OPERATE */ + OUT(HIL_PKT_CMD | HIL_CMD_POL) + EXPECT(HIL_PKT_CMD | HIL_CMD_POL | HIL_ERR_INT, + 20000, HILSEN_NEXT, HILSEN_DSR, HILSEN_NEXT) + FUNC(hilse_operate, 0, HILSEN_OPERATE, HILSEN_IFC, HILSEN_NEXT) + + /* 44 HILSEN_PROBE */ + OUT_LAST(HIL_PKT_CMD | HIL_CMD_EPT) + IN(10000, HILSEN_DISC, HILSEN_DSR, HILSEN_NEXT) + OUT_DISC(HIL_PKT_CMD | HIL_CMD_ELB) + IN(10000, HILSEN_DISC, HILSEN_DSR, HILSEN_NEXT) + OUT(HIL_PKT_CMD | HIL_CMD_ACF | 1) + IN(10000, HILSEN_DISC0, HILSEN_DSR, HILSEN_NEXT) + OUT_LAST(HIL_PKT_CMD | HIL_CMD_ELB) + IN(10000, HILSEN_OPERATE, HILSEN_DSR, HILSEN_DSR) + + /* 52 HILSEN_DSR */ + FUNC(hilse_set_ddi, -1, HILSEN_NEXT, 0, 0) + OUT(HIL_PKT_CMD | HIL_CMD_DSR) + IN(20000, HILSEN_DHR, HILSEN_DHR, HILSEN_IFC) + + /* 55 HILSEN_REPOLL */ + OUT(HIL_PKT_CMD | HIL_CMD_RPL) + EXPECT(HIL_PKT_CMD | HIL_CMD_RPL | HIL_ERR_INT, + 20000, HILSEN_NEXT, HILSEN_DSR, HILSEN_NEXT) + FUNC(hilse_operate, 1, HILSEN_OPERATE, HILSEN_IFC, HILSEN_PROBE) + + /* 58 HILSEN_IFCACF */ + OUT(HIL_PKT_CMD | HIL_CMD_IFC) + EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT, + 20000, HILSEN_ACF2, HILSEN_DHR2, HILSEN_HEAL) + + /* 60 HILSEN_END */ +}; + +static inline void hilse_setup_input(hil_mlc *mlc, const struct hilse_node *node) +{ + + switch (node->act) { + case HILSE_EXPECT_DISC: + mlc->imatch = node->object.packet; + mlc->imatch |= ((mlc->ddi + 2) << HIL_PKT_ADDR_SHIFT); + break; + case HILSE_EXPECT_LAST: + mlc->imatch = node->object.packet; + mlc->imatch |= ((mlc->ddi + 1) << HIL_PKT_ADDR_SHIFT); + break; + case HILSE_EXPECT: + mlc->imatch = node->object.packet; + break; + case HILSE_IN: + mlc->imatch = 0; + break; + default: + BUG(); + } + mlc->istarted = 1; + mlc->intimeout = usecs_to_jiffies(node->arg); + mlc->instart = jiffies; + mlc->icount = 15; + memset(mlc->ipacket, 0, 16 * sizeof(hil_packet)); + BUG_ON(down_trylock(&mlc->isem)); +} + +#ifdef HIL_MLC_DEBUG +static int doze; +static int seidx; /* For debug */ +#endif + +static int hilse_donode(hil_mlc *mlc) +{ + const struct hilse_node *node; + int nextidx = 0; + int sched_long = 0; + unsigned long flags; + +#ifdef HIL_MLC_DEBUG + if (mlc->seidx && mlc->seidx != seidx && + mlc->seidx != 41 && mlc->seidx != 42 && mlc->seidx != 43) { + printk(KERN_DEBUG PREFIX "z%i \n {%i}", doze, mlc->seidx); + doze = 0; + } + + seidx = mlc->seidx; +#endif + node = hil_mlc_se + mlc->seidx; + + switch (node->act) { + int rc; + hil_packet pack; + + case HILSE_FUNC: + BUG_ON(node->object.func == NULL); + rc = node->object.func(mlc, node->arg); + nextidx = (rc > 0) ? node->ugly : + ((rc < 0) ? node->bad : node->good); + if (nextidx == HILSEN_FOLLOW) + nextidx = rc; + break; + + case HILSE_EXPECT_LAST: + case HILSE_EXPECT_DISC: + case HILSE_EXPECT: + case HILSE_IN: + /* Already set up from previous HILSE_OUT_* */ + write_lock_irqsave(&mlc->lock, flags); + rc = mlc->in(mlc, node->arg); + if (rc == 2) { + nextidx = HILSEN_DOZE; + sched_long = 1; + write_unlock_irqrestore(&mlc->lock, flags); + break; + } + if (rc == 1) + nextidx = node->ugly; + else if (rc == 0) + nextidx = node->good; + else + nextidx = node->bad; + mlc->istarted = 0; + write_unlock_irqrestore(&mlc->lock, flags); + break; + + case HILSE_OUT_LAST: + write_lock_irqsave(&mlc->lock, flags); + pack = node->object.packet; + pack |= ((mlc->ddi + 1) << HIL_PKT_ADDR_SHIFT); + goto out; + + case HILSE_OUT_DISC: + write_lock_irqsave(&mlc->lock, flags); + pack = node->object.packet; + pack |= ((mlc->ddi + 2) << HIL_PKT_ADDR_SHIFT); + goto out; + + case HILSE_OUT: + write_lock_irqsave(&mlc->lock, flags); + pack = node->object.packet; + out: + if (!mlc->istarted) { + /* Prepare to receive input */ + if ((node + 1)->act & HILSE_IN) + hilse_setup_input(mlc, node + 1); + } + + write_unlock_irqrestore(&mlc->lock, flags); + + if (down_trylock(&mlc->osem)) { + nextidx = HILSEN_DOZE; + break; + } + up(&mlc->osem); + + write_lock_irqsave(&mlc->lock, flags); + if (!mlc->ostarted) { + mlc->ostarted = 1; + mlc->opacket = pack; + rc = mlc->out(mlc); + nextidx = HILSEN_DOZE; + write_unlock_irqrestore(&mlc->lock, flags); + if (rc) { + hil_mlc_stop = 1; + return 1; + } + break; + } + mlc->ostarted = 0; + mlc->instart = jiffies; + write_unlock_irqrestore(&mlc->lock, flags); + nextidx = HILSEN_NEXT; + break; + + case HILSE_CTS: + write_lock_irqsave(&mlc->lock, flags); + rc = mlc->cts(mlc); + nextidx = rc ? node->bad : node->good; + write_unlock_irqrestore(&mlc->lock, flags); + if (rc) { + hil_mlc_stop = 1; + return 1; + } + break; + + default: + BUG(); + } + +#ifdef HIL_MLC_DEBUG + if (nextidx == HILSEN_DOZE) + doze++; +#endif + + while (nextidx & HILSEN_SCHED) { + unsigned long now = jiffies; + + if (!sched_long) + goto sched; + + if (time_after(now, mlc->instart + mlc->intimeout)) + goto sched; + mod_timer(&hil_mlcs_kicker, mlc->instart + mlc->intimeout); + break; + sched: + tasklet_schedule(&hil_mlcs_tasklet); + break; + } + + if (nextidx & HILSEN_DOWN) + mlc->seidx += nextidx & HILSEN_MASK; + else if (nextidx & HILSEN_UP) + mlc->seidx -= nextidx & HILSEN_MASK; + else + mlc->seidx = nextidx & HILSEN_MASK; + + if (nextidx & HILSEN_BREAK) + return 1; + + return 0; +} + +/******************** tasklet context functions **************************/ +static void hil_mlcs_process(unsigned long unused) +{ + struct list_head *tmp; + + read_lock(&hil_mlcs_lock); + list_for_each(tmp, &hil_mlcs) { + struct hil_mlc *mlc = list_entry(tmp, hil_mlc, list); + while (hilse_donode(mlc) == 0) { +#ifdef HIL_MLC_DEBUG + if (mlc->seidx != 41 && + mlc->seidx != 42 && + mlc->seidx != 43) + printk(KERN_DEBUG PREFIX " + "); +#endif + } + } + read_unlock(&hil_mlcs_lock); +} + +/************************* Keepalive timer task *********************/ + +static void hil_mlcs_timer(struct timer_list *unused) +{ + if (hil_mlc_stop) { + /* could not send packet - stop immediately. */ + pr_warn(PREFIX "HIL seems stuck - Disabling HIL MLC.\n"); + return; + } + + hil_mlcs_probe = 1; + tasklet_schedule(&hil_mlcs_tasklet); + /* Re-insert the periodic task. */ + if (!timer_pending(&hil_mlcs_kicker)) + mod_timer(&hil_mlcs_kicker, jiffies + HZ); +} + +/******************** user/kernel context functions **********************/ + +static int hil_mlc_serio_write(struct serio *serio, unsigned char c) +{ + struct hil_mlc_serio_map *map; + struct hil_mlc *mlc; + struct serio_driver *drv; + uint8_t *idx, *last; + + map = serio->port_data; + BUG_ON(map == NULL); + + mlc = map->mlc; + BUG_ON(mlc == NULL); + + mlc->serio_opacket[map->didx] |= + ((hil_packet)c) << (8 * (3 - mlc->serio_oidx[map->didx])); + + if (mlc->serio_oidx[map->didx] >= 3) { + /* for now only commands */ + if (!(mlc->serio_opacket[map->didx] & HIL_PKT_CMD)) + return -EIO; + switch (mlc->serio_opacket[map->didx] & HIL_PKT_DATA_MASK) { + case HIL_CMD_IDD: + idx = mlc->di[map->didx].idd; + goto emu; + case HIL_CMD_RSC: + idx = mlc->di[map->didx].rsc; + goto emu; + case HIL_CMD_EXD: + idx = mlc->di[map->didx].exd; + goto emu; + case HIL_CMD_RNM: + idx = mlc->di[map->didx].rnm; + goto emu; + default: + break; + } + mlc->serio_oidx[map->didx] = 0; + mlc->serio_opacket[map->didx] = 0; + } + + mlc->serio_oidx[map->didx]++; + return -EIO; + emu: + drv = serio->drv; + BUG_ON(drv == NULL); + + last = idx + 15; + while ((last != idx) && (*last == 0)) + last--; + + while (idx != last) { + drv->interrupt(serio, 0, 0); + drv->interrupt(serio, HIL_ERR_INT >> 16, 0); + drv->interrupt(serio, 0, 0); + drv->interrupt(serio, *idx, 0); + idx++; + } + drv->interrupt(serio, 0, 0); + drv->interrupt(serio, HIL_ERR_INT >> 16, 0); + drv->interrupt(serio, HIL_PKT_CMD >> 8, 0); + drv->interrupt(serio, *idx, 0); + + mlc->serio_oidx[map->didx] = 0; + mlc->serio_opacket[map->didx] = 0; + + return 0; +} + +static int hil_mlc_serio_open(struct serio *serio) +{ + struct hil_mlc_serio_map *map; + struct hil_mlc *mlc; + + if (serio_get_drvdata(serio) != NULL) + return -EBUSY; + + map = serio->port_data; + BUG_ON(map == NULL); + + mlc = map->mlc; + BUG_ON(mlc == NULL); + + return 0; +} + +static void hil_mlc_serio_close(struct serio *serio) +{ + struct hil_mlc_serio_map *map; + struct hil_mlc *mlc; + + map = serio->port_data; + BUG_ON(map == NULL); + + mlc = map->mlc; + BUG_ON(mlc == NULL); + + serio_set_drvdata(serio, NULL); + serio->drv = NULL; + /* TODO wake up interruptable */ +} + +static const struct serio_device_id hil_mlc_serio_id = { + .type = SERIO_HIL_MLC, + .proto = SERIO_HIL, + .extra = SERIO_ANY, + .id = SERIO_ANY, +}; + +int hil_mlc_register(hil_mlc *mlc) +{ + int i; + unsigned long flags; + + BUG_ON(mlc == NULL); + + mlc->istarted = 0; + mlc->ostarted = 0; + + rwlock_init(&mlc->lock); + sema_init(&mlc->osem, 1); + + sema_init(&mlc->isem, 1); + mlc->icount = -1; + mlc->imatch = 0; + + mlc->opercnt = 0; + + sema_init(&(mlc->csem), 0); + + hil_mlc_clear_di_scratch(mlc); + hil_mlc_clear_di_map(mlc, 0); + for (i = 0; i < HIL_MLC_DEVMEM; i++) { + struct serio *mlc_serio; + hil_mlc_copy_di_scratch(mlc, i); + mlc_serio = kzalloc(sizeof(*mlc_serio), GFP_KERNEL); + mlc->serio[i] = mlc_serio; + if (!mlc->serio[i]) { + for (; i >= 0; i--) + kfree(mlc->serio[i]); + return -ENOMEM; + } + snprintf(mlc_serio->name, sizeof(mlc_serio->name)-1, "HIL_SERIO%d", i); + snprintf(mlc_serio->phys, sizeof(mlc_serio->phys)-1, "HIL%d", i); + mlc_serio->id = hil_mlc_serio_id; + mlc_serio->id.id = i; /* HIL port no. */ + mlc_serio->write = hil_mlc_serio_write; + mlc_serio->open = hil_mlc_serio_open; + mlc_serio->close = hil_mlc_serio_close; + mlc_serio->port_data = &(mlc->serio_map[i]); + mlc->serio_map[i].mlc = mlc; + mlc->serio_map[i].didx = i; + mlc->serio_map[i].di_revmap = -1; + mlc->serio_opacket[i] = 0; + mlc->serio_oidx[i] = 0; + serio_register_port(mlc_serio); + } + + mlc->tasklet = &hil_mlcs_tasklet; + + write_lock_irqsave(&hil_mlcs_lock, flags); + list_add_tail(&mlc->list, &hil_mlcs); + mlc->seidx = HILSEN_START; + write_unlock_irqrestore(&hil_mlcs_lock, flags); + + tasklet_schedule(&hil_mlcs_tasklet); + return 0; +} + +int hil_mlc_unregister(hil_mlc *mlc) +{ + struct list_head *tmp; + unsigned long flags; + int i; + + BUG_ON(mlc == NULL); + + write_lock_irqsave(&hil_mlcs_lock, flags); + list_for_each(tmp, &hil_mlcs) + if (list_entry(tmp, hil_mlc, list) == mlc) + goto found; + + /* not found in list */ + write_unlock_irqrestore(&hil_mlcs_lock, flags); + tasklet_schedule(&hil_mlcs_tasklet); + return -ENODEV; + + found: + list_del(tmp); + write_unlock_irqrestore(&hil_mlcs_lock, flags); + + for (i = 0; i < HIL_MLC_DEVMEM; i++) { + serio_unregister_port(mlc->serio[i]); + mlc->serio[i] = NULL; + } + + tasklet_schedule(&hil_mlcs_tasklet); + return 0; +} + +/**************************** Module interface *************************/ + +static int __init hil_mlc_init(void) +{ + timer_setup(&hil_mlcs_kicker, &hil_mlcs_timer, 0); + mod_timer(&hil_mlcs_kicker, jiffies + HZ); + + tasklet_enable(&hil_mlcs_tasklet); + + return 0; +} + +static void __exit hil_mlc_exit(void) +{ + del_timer_sync(&hil_mlcs_kicker); + tasklet_kill(&hil_mlcs_tasklet); +} + +module_init(hil_mlc_init); +module_exit(hil_mlc_exit); diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c new file mode 100644 index 000000000..13eacf6ab --- /dev/null +++ b/drivers/input/serio/hp_sdc.c @@ -0,0 +1,1127 @@ +/* + * HP i8042-based System Device Controller driver. + * + * Copyright (c) 2001 Brian S. Julin + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * + * References: + * System Device Controller Microprocessor Firmware Theory of Operation + * for Part Number 1820-4784 Revision B. Dwg No. A-1820-4784-2 + * Helge Deller's original hilkbd.c port for PA-RISC. + * + * + * Driver theory of operation: + * + * hp_sdc_put does all writing to the SDC. ISR can run on a different + * CPU than hp_sdc_put, but only one CPU runs hp_sdc_put at a time + * (it cannot really benefit from SMP anyway.) A tasket fit this perfectly. + * + * All data coming back from the SDC is sent via interrupt and can be read + * fully in the ISR, so there are no latency/throughput problems there. + * The problem is with output, due to the slow clock speed of the SDC + * compared to the CPU. This should not be too horrible most of the time, + * but if used with HIL devices that support the multibyte transfer command, + * keeping outbound throughput flowing at the 6500KBps that the HIL is + * capable of is more than can be done at HZ=100. + * + * Busy polling for IBF clear wastes CPU cycles and bus cycles. hp_sdc.ibf + * is set to 0 when the IBF flag in the status register has cleared. ISR + * may do this, and may also access the parts of queued transactions related + * to reading data back from the SDC, but otherwise will not touch the + * hp_sdc state. Whenever a register is written hp_sdc.ibf is set to 1. + * + * The i8042 write index and the values in the 4-byte input buffer + * starting at 0x70 are kept track of in hp_sdc.wi, and .r7[], respectively, + * to minimize the amount of IO needed to the SDC. However these values + * do not need to be locked since they are only ever accessed by hp_sdc_put. + * + * A timer task schedules the tasklet once per second just to make + * sure it doesn't freeze up and to allow for bad reads to time out. + */ + +#include <linux/hp_sdc.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/time.h> +#include <linux/semaphore.h> +#include <linux/slab.h> +#include <linux/hil.h> +#include <asm/io.h> + +/* Machine-specific abstraction */ + +#if defined(__hppa__) +# include <asm/parisc-device.h> +# define sdc_readb(p) gsc_readb(p) +# define sdc_writeb(v,p) gsc_writeb((v),(p)) +#elif defined(__mc68000__) +#include <linux/uaccess.h> +# define sdc_readb(p) in_8(p) +# define sdc_writeb(v,p) out_8((p),(v)) +#else +# error "HIL is not supported on this platform" +#endif + +#define PREFIX "HP SDC: " + +MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); +MODULE_DESCRIPTION("HP i8042-based SDC Driver"); +MODULE_LICENSE("Dual BSD/GPL"); + +EXPORT_SYMBOL(hp_sdc_request_timer_irq); +EXPORT_SYMBOL(hp_sdc_request_hil_irq); +EXPORT_SYMBOL(hp_sdc_request_cooked_irq); + +EXPORT_SYMBOL(hp_sdc_release_timer_irq); +EXPORT_SYMBOL(hp_sdc_release_hil_irq); +EXPORT_SYMBOL(hp_sdc_release_cooked_irq); + +EXPORT_SYMBOL(__hp_sdc_enqueue_transaction); +EXPORT_SYMBOL(hp_sdc_enqueue_transaction); +EXPORT_SYMBOL(hp_sdc_dequeue_transaction); + +static bool hp_sdc_disabled; +module_param_named(no_hpsdc, hp_sdc_disabled, bool, 0); +MODULE_PARM_DESC(no_hpsdc, "Do not enable HP SDC driver."); + +static hp_i8042_sdc hp_sdc; /* All driver state is kept in here. */ + +/*************** primitives for use in any context *********************/ +static inline uint8_t hp_sdc_status_in8(void) +{ + uint8_t status; + unsigned long flags; + + write_lock_irqsave(&hp_sdc.ibf_lock, flags); + status = sdc_readb(hp_sdc.status_io); + if (!(status & HP_SDC_STATUS_IBF)) + hp_sdc.ibf = 0; + write_unlock_irqrestore(&hp_sdc.ibf_lock, flags); + + return status; +} + +static inline uint8_t hp_sdc_data_in8(void) +{ + return sdc_readb(hp_sdc.data_io); +} + +static inline void hp_sdc_status_out8(uint8_t val) +{ + unsigned long flags; + + write_lock_irqsave(&hp_sdc.ibf_lock, flags); + hp_sdc.ibf = 1; + if ((val & 0xf0) == 0xe0) + hp_sdc.wi = 0xff; + sdc_writeb(val, hp_sdc.status_io); + write_unlock_irqrestore(&hp_sdc.ibf_lock, flags); +} + +static inline void hp_sdc_data_out8(uint8_t val) +{ + unsigned long flags; + + write_lock_irqsave(&hp_sdc.ibf_lock, flags); + hp_sdc.ibf = 1; + sdc_writeb(val, hp_sdc.data_io); + write_unlock_irqrestore(&hp_sdc.ibf_lock, flags); +} + +/* Care must be taken to only invoke hp_sdc_spin_ibf when + * absolutely needed, or in rarely invoked subroutines. + * Not only does it waste CPU cycles, it also wastes bus cycles. + */ +static inline void hp_sdc_spin_ibf(void) +{ + unsigned long flags; + rwlock_t *lock; + + lock = &hp_sdc.ibf_lock; + + read_lock_irqsave(lock, flags); + if (!hp_sdc.ibf) { + read_unlock_irqrestore(lock, flags); + return; + } + read_unlock(lock); + write_lock(lock); + while (sdc_readb(hp_sdc.status_io) & HP_SDC_STATUS_IBF) + { } + hp_sdc.ibf = 0; + write_unlock_irqrestore(lock, flags); +} + + +/************************ Interrupt context functions ************************/ +static void hp_sdc_take(int irq, void *dev_id, uint8_t status, uint8_t data) +{ + hp_sdc_transaction *curr; + + read_lock(&hp_sdc.rtq_lock); + if (hp_sdc.rcurr < 0) { + read_unlock(&hp_sdc.rtq_lock); + return; + } + curr = hp_sdc.tq[hp_sdc.rcurr]; + read_unlock(&hp_sdc.rtq_lock); + + curr->seq[curr->idx++] = status; + curr->seq[curr->idx++] = data; + hp_sdc.rqty -= 2; + hp_sdc.rtime = ktime_get(); + + if (hp_sdc.rqty <= 0) { + /* All data has been gathered. */ + if (curr->seq[curr->actidx] & HP_SDC_ACT_SEMAPHORE) + if (curr->act.semaphore) + up(curr->act.semaphore); + + if (curr->seq[curr->actidx] & HP_SDC_ACT_CALLBACK) + if (curr->act.irqhook) + curr->act.irqhook(irq, dev_id, status, data); + + curr->actidx = curr->idx; + curr->idx++; + /* Return control of this transaction */ + write_lock(&hp_sdc.rtq_lock); + hp_sdc.rcurr = -1; + hp_sdc.rqty = 0; + write_unlock(&hp_sdc.rtq_lock); + tasklet_schedule(&hp_sdc.task); + } +} + +static irqreturn_t hp_sdc_isr(int irq, void *dev_id) +{ + uint8_t status, data; + + status = hp_sdc_status_in8(); + /* Read data unconditionally to advance i8042. */ + data = hp_sdc_data_in8(); + + /* For now we are ignoring these until we get the SDC to behave. */ + if (((status & 0xf1) == 0x51) && data == 0x82) + return IRQ_HANDLED; + + switch (status & HP_SDC_STATUS_IRQMASK) { + case 0: /* This case is not documented. */ + break; + + case HP_SDC_STATUS_USERTIMER: + case HP_SDC_STATUS_PERIODIC: + case HP_SDC_STATUS_TIMER: + read_lock(&hp_sdc.hook_lock); + if (hp_sdc.timer != NULL) + hp_sdc.timer(irq, dev_id, status, data); + read_unlock(&hp_sdc.hook_lock); + break; + + case HP_SDC_STATUS_REG: + hp_sdc_take(irq, dev_id, status, data); + break; + + case HP_SDC_STATUS_HILCMD: + case HP_SDC_STATUS_HILDATA: + read_lock(&hp_sdc.hook_lock); + if (hp_sdc.hil != NULL) + hp_sdc.hil(irq, dev_id, status, data); + read_unlock(&hp_sdc.hook_lock); + break; + + case HP_SDC_STATUS_PUP: + read_lock(&hp_sdc.hook_lock); + if (hp_sdc.pup != NULL) + hp_sdc.pup(irq, dev_id, status, data); + else + printk(KERN_INFO PREFIX "HP SDC reports successful PUP.\n"); + read_unlock(&hp_sdc.hook_lock); + break; + + default: + read_lock(&hp_sdc.hook_lock); + if (hp_sdc.cooked != NULL) + hp_sdc.cooked(irq, dev_id, status, data); + read_unlock(&hp_sdc.hook_lock); + break; + } + + return IRQ_HANDLED; +} + + +static irqreturn_t hp_sdc_nmisr(int irq, void *dev_id) +{ + int status; + + status = hp_sdc_status_in8(); + printk(KERN_WARNING PREFIX "NMI !\n"); + +#if 0 + if (status & HP_SDC_NMISTATUS_FHS) { + read_lock(&hp_sdc.hook_lock); + if (hp_sdc.timer != NULL) + hp_sdc.timer(irq, dev_id, status, 0); + read_unlock(&hp_sdc.hook_lock); + } else { + /* TODO: pass this on to the HIL handler, or do SAK here? */ + printk(KERN_WARNING PREFIX "HIL NMI\n"); + } +#endif + + return IRQ_HANDLED; +} + + +/***************** Kernel (tasklet) context functions ****************/ + +unsigned long hp_sdc_put(void); + +static void hp_sdc_tasklet(unsigned long foo) +{ + write_lock_irq(&hp_sdc.rtq_lock); + + if (hp_sdc.rcurr >= 0) { + ktime_t now = ktime_get(); + + if (ktime_after(now, ktime_add_us(hp_sdc.rtime, + HP_SDC_MAX_REG_DELAY))) { + hp_sdc_transaction *curr; + uint8_t tmp; + + curr = hp_sdc.tq[hp_sdc.rcurr]; + /* If this turns out to be a normal failure mode + * we'll need to figure out a way to communicate + * it back to the application. and be less verbose. + */ + printk(KERN_WARNING PREFIX "read timeout (%lldus)!\n", + ktime_us_delta(now, hp_sdc.rtime)); + curr->idx += hp_sdc.rqty; + hp_sdc.rqty = 0; + tmp = curr->seq[curr->actidx]; + curr->seq[curr->actidx] |= HP_SDC_ACT_DEAD; + if (tmp & HP_SDC_ACT_SEMAPHORE) + if (curr->act.semaphore) + up(curr->act.semaphore); + + if (tmp & HP_SDC_ACT_CALLBACK) { + /* Note this means that irqhooks may be called + * in tasklet/bh context. + */ + if (curr->act.irqhook) + curr->act.irqhook(0, NULL, 0, 0); + } + + curr->actidx = curr->idx; + curr->idx++; + hp_sdc.rcurr = -1; + } + } + write_unlock_irq(&hp_sdc.rtq_lock); + hp_sdc_put(); +} + +unsigned long hp_sdc_put(void) +{ + hp_sdc_transaction *curr; + uint8_t act; + int idx, curridx; + + int limit = 0; + + write_lock(&hp_sdc.lock); + + /* If i8042 buffers are full, we cannot do anything that + requires output, so we skip to the administrativa. */ + if (hp_sdc.ibf) { + hp_sdc_status_in8(); + if (hp_sdc.ibf) + goto finish; + } + + anew: + /* See if we are in the middle of a sequence. */ + if (hp_sdc.wcurr < 0) + hp_sdc.wcurr = 0; + read_lock_irq(&hp_sdc.rtq_lock); + if (hp_sdc.rcurr == hp_sdc.wcurr) + hp_sdc.wcurr++; + read_unlock_irq(&hp_sdc.rtq_lock); + if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) + hp_sdc.wcurr = 0; + curridx = hp_sdc.wcurr; + + if (hp_sdc.tq[curridx] != NULL) + goto start; + + while (++curridx != hp_sdc.wcurr) { + if (curridx >= HP_SDC_QUEUE_LEN) { + curridx = -1; /* Wrap to top */ + continue; + } + read_lock_irq(&hp_sdc.rtq_lock); + if (hp_sdc.rcurr == curridx) { + read_unlock_irq(&hp_sdc.rtq_lock); + continue; + } + read_unlock_irq(&hp_sdc.rtq_lock); + if (hp_sdc.tq[curridx] != NULL) + break; /* Found one. */ + } + if (curridx == hp_sdc.wcurr) { /* There's nothing queued to do. */ + curridx = -1; + } + hp_sdc.wcurr = curridx; + + start: + + /* Check to see if the interrupt mask needs to be set. */ + if (hp_sdc.set_im) { + hp_sdc_status_out8(hp_sdc.im | HP_SDC_CMD_SET_IM); + hp_sdc.set_im = 0; + goto finish; + } + + if (hp_sdc.wcurr == -1) + goto done; + + curr = hp_sdc.tq[curridx]; + idx = curr->actidx; + + if (curr->actidx >= curr->endidx) { + hp_sdc.tq[curridx] = NULL; + /* Interleave outbound data between the transactions. */ + hp_sdc.wcurr++; + if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) + hp_sdc.wcurr = 0; + goto finish; + } + + act = curr->seq[idx]; + idx++; + + if (curr->idx >= curr->endidx) { + if (act & HP_SDC_ACT_DEALLOC) + kfree(curr); + hp_sdc.tq[curridx] = NULL; + /* Interleave outbound data between the transactions. */ + hp_sdc.wcurr++; + if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) + hp_sdc.wcurr = 0; + goto finish; + } + + while (act & HP_SDC_ACT_PRECMD) { + if (curr->idx != idx) { + idx++; + act &= ~HP_SDC_ACT_PRECMD; + break; + } + hp_sdc_status_out8(curr->seq[idx]); + curr->idx++; + /* act finished? */ + if ((act & HP_SDC_ACT_DURING) == HP_SDC_ACT_PRECMD) + goto actdone; + /* skip quantity field if data-out sequence follows. */ + if (act & HP_SDC_ACT_DATAOUT) + curr->idx++; + goto finish; + } + if (act & HP_SDC_ACT_DATAOUT) { + int qty; + + qty = curr->seq[idx]; + idx++; + if (curr->idx - idx < qty) { + hp_sdc_data_out8(curr->seq[curr->idx]); + curr->idx++; + /* act finished? */ + if (curr->idx - idx >= qty && + (act & HP_SDC_ACT_DURING) == HP_SDC_ACT_DATAOUT) + goto actdone; + goto finish; + } + idx += qty; + act &= ~HP_SDC_ACT_DATAOUT; + } else + while (act & HP_SDC_ACT_DATAREG) { + int mask; + uint8_t w7[4]; + + mask = curr->seq[idx]; + if (idx != curr->idx) { + idx++; + idx += !!(mask & 1); + idx += !!(mask & 2); + idx += !!(mask & 4); + idx += !!(mask & 8); + act &= ~HP_SDC_ACT_DATAREG; + break; + } + + w7[0] = (mask & 1) ? curr->seq[++idx] : hp_sdc.r7[0]; + w7[1] = (mask & 2) ? curr->seq[++idx] : hp_sdc.r7[1]; + w7[2] = (mask & 4) ? curr->seq[++idx] : hp_sdc.r7[2]; + w7[3] = (mask & 8) ? curr->seq[++idx] : hp_sdc.r7[3]; + + if (hp_sdc.wi > 0x73 || hp_sdc.wi < 0x70 || + w7[hp_sdc.wi - 0x70] == hp_sdc.r7[hp_sdc.wi - 0x70]) { + int i = 0; + + /* Need to point the write index register */ + while (i < 4 && w7[i] == hp_sdc.r7[i]) + i++; + + if (i < 4) { + hp_sdc_status_out8(HP_SDC_CMD_SET_D0 + i); + hp_sdc.wi = 0x70 + i; + goto finish; + } + + idx++; + if ((act & HP_SDC_ACT_DURING) == HP_SDC_ACT_DATAREG) + goto actdone; + + curr->idx = idx; + act &= ~HP_SDC_ACT_DATAREG; + break; + } + + hp_sdc_data_out8(w7[hp_sdc.wi - 0x70]); + hp_sdc.r7[hp_sdc.wi - 0x70] = w7[hp_sdc.wi - 0x70]; + hp_sdc.wi++; /* write index register autoincrements */ + { + int i = 0; + + while ((i < 4) && w7[i] == hp_sdc.r7[i]) + i++; + if (i >= 4) { + curr->idx = idx + 1; + if ((act & HP_SDC_ACT_DURING) == + HP_SDC_ACT_DATAREG) + goto actdone; + } + } + goto finish; + } + /* We don't go any further in the command if there is a pending read, + because we don't want interleaved results. */ + read_lock_irq(&hp_sdc.rtq_lock); + if (hp_sdc.rcurr >= 0) { + read_unlock_irq(&hp_sdc.rtq_lock); + goto finish; + } + read_unlock_irq(&hp_sdc.rtq_lock); + + + if (act & HP_SDC_ACT_POSTCMD) { + uint8_t postcmd; + + /* curr->idx should == idx at this point. */ + postcmd = curr->seq[idx]; + curr->idx++; + if (act & HP_SDC_ACT_DATAIN) { + + /* Start a new read */ + hp_sdc.rqty = curr->seq[curr->idx]; + hp_sdc.rtime = ktime_get(); + curr->idx++; + /* Still need to lock here in case of spurious irq. */ + write_lock_irq(&hp_sdc.rtq_lock); + hp_sdc.rcurr = curridx; + write_unlock_irq(&hp_sdc.rtq_lock); + hp_sdc_status_out8(postcmd); + goto finish; + } + hp_sdc_status_out8(postcmd); + goto actdone; + } + + actdone: + if (act & HP_SDC_ACT_SEMAPHORE) + up(curr->act.semaphore); + else if (act & HP_SDC_ACT_CALLBACK) + curr->act.irqhook(0,NULL,0,0); + + if (curr->idx >= curr->endidx) { /* This transaction is over. */ + if (act & HP_SDC_ACT_DEALLOC) + kfree(curr); + hp_sdc.tq[curridx] = NULL; + } else { + curr->actidx = idx + 1; + curr->idx = idx + 2; + } + /* Interleave outbound data between the transactions. */ + hp_sdc.wcurr++; + if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) + hp_sdc.wcurr = 0; + + finish: + /* If by some quirk IBF has cleared and our ISR has run to + see that that has happened, do it all again. */ + if (!hp_sdc.ibf && limit++ < 20) + goto anew; + + done: + if (hp_sdc.wcurr >= 0) + tasklet_schedule(&hp_sdc.task); + write_unlock(&hp_sdc.lock); + + return 0; +} + +/******* Functions called in either user or kernel context ****/ +int __hp_sdc_enqueue_transaction(hp_sdc_transaction *this) +{ + int i; + + if (this == NULL) { + BUG(); + return -EINVAL; + } + + /* Can't have same transaction on queue twice */ + for (i = 0; i < HP_SDC_QUEUE_LEN; i++) + if (hp_sdc.tq[i] == this) + goto fail; + + this->actidx = 0; + this->idx = 1; + + /* Search for empty slot */ + for (i = 0; i < HP_SDC_QUEUE_LEN; i++) + if (hp_sdc.tq[i] == NULL) { + hp_sdc.tq[i] = this; + tasklet_schedule(&hp_sdc.task); + return 0; + } + + printk(KERN_WARNING PREFIX "No free slot to add transaction.\n"); + return -EBUSY; + + fail: + printk(KERN_WARNING PREFIX "Transaction add failed: transaction already queued?\n"); + return -EINVAL; +} + +int hp_sdc_enqueue_transaction(hp_sdc_transaction *this) { + unsigned long flags; + int ret; + + write_lock_irqsave(&hp_sdc.lock, flags); + ret = __hp_sdc_enqueue_transaction(this); + write_unlock_irqrestore(&hp_sdc.lock,flags); + + return ret; +} + +int hp_sdc_dequeue_transaction(hp_sdc_transaction *this) +{ + unsigned long flags; + int i; + + write_lock_irqsave(&hp_sdc.lock, flags); + + /* TODO: don't remove it if it's not done. */ + + for (i = 0; i < HP_SDC_QUEUE_LEN; i++) + if (hp_sdc.tq[i] == this) + hp_sdc.tq[i] = NULL; + + write_unlock_irqrestore(&hp_sdc.lock, flags); + return 0; +} + + + +/********************** User context functions **************************/ +int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback) +{ + if (callback == NULL || hp_sdc.dev == NULL) + return -EINVAL; + + write_lock_irq(&hp_sdc.hook_lock); + if (hp_sdc.timer != NULL) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EBUSY; + } + + hp_sdc.timer = callback; + /* Enable interrupts from the timers */ + hp_sdc.im &= ~HP_SDC_IM_FH; + hp_sdc.im &= ~HP_SDC_IM_PT; + hp_sdc.im &= ~HP_SDC_IM_TIMERS; + hp_sdc.set_im = 1; + write_unlock_irq(&hp_sdc.hook_lock); + + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback) +{ + if (callback == NULL || hp_sdc.dev == NULL) + return -EINVAL; + + write_lock_irq(&hp_sdc.hook_lock); + if (hp_sdc.hil != NULL) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EBUSY; + } + + hp_sdc.hil = callback; + hp_sdc.im &= ~(HP_SDC_IM_HIL | HP_SDC_IM_RESET); + hp_sdc.set_im = 1; + write_unlock_irq(&hp_sdc.hook_lock); + + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback) +{ + if (callback == NULL || hp_sdc.dev == NULL) + return -EINVAL; + + write_lock_irq(&hp_sdc.hook_lock); + if (hp_sdc.cooked != NULL) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EBUSY; + } + + /* Enable interrupts from the HIL MLC */ + hp_sdc.cooked = callback; + hp_sdc.im &= ~(HP_SDC_IM_HIL | HP_SDC_IM_RESET); + hp_sdc.set_im = 1; + write_unlock_irq(&hp_sdc.hook_lock); + + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback) +{ + write_lock_irq(&hp_sdc.hook_lock); + if ((callback != hp_sdc.timer) || + (hp_sdc.timer == NULL)) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EINVAL; + } + + /* Disable interrupts from the timers */ + hp_sdc.timer = NULL; + hp_sdc.im |= HP_SDC_IM_TIMERS; + hp_sdc.im |= HP_SDC_IM_FH; + hp_sdc.im |= HP_SDC_IM_PT; + hp_sdc.set_im = 1; + write_unlock_irq(&hp_sdc.hook_lock); + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback) +{ + write_lock_irq(&hp_sdc.hook_lock); + if ((callback != hp_sdc.hil) || + (hp_sdc.hil == NULL)) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EINVAL; + } + + hp_sdc.hil = NULL; + /* Disable interrupts from HIL only if there is no cooked driver. */ + if(hp_sdc.cooked == NULL) { + hp_sdc.im |= (HP_SDC_IM_HIL | HP_SDC_IM_RESET); + hp_sdc.set_im = 1; + } + write_unlock_irq(&hp_sdc.hook_lock); + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback) +{ + write_lock_irq(&hp_sdc.hook_lock); + if ((callback != hp_sdc.cooked) || + (hp_sdc.cooked == NULL)) { + write_unlock_irq(&hp_sdc.hook_lock); + return -EINVAL; + } + + hp_sdc.cooked = NULL; + /* Disable interrupts from HIL only if there is no raw HIL driver. */ + if(hp_sdc.hil == NULL) { + hp_sdc.im |= (HP_SDC_IM_HIL | HP_SDC_IM_RESET); + hp_sdc.set_im = 1; + } + write_unlock_irq(&hp_sdc.hook_lock); + tasklet_schedule(&hp_sdc.task); + + return 0; +} + +/************************* Keepalive timer task *********************/ + +static void hp_sdc_kicker(struct timer_list *unused) +{ + tasklet_schedule(&hp_sdc.task); + /* Re-insert the periodic task. */ + mod_timer(&hp_sdc.kicker, jiffies + HZ); +} + +/************************** Module Initialization ***************************/ + +#if defined(__hppa__) + +static const struct parisc_device_id hp_sdc_tbl[] __initconst = { + { + .hw_type = HPHW_FIO, + .hversion_rev = HVERSION_REV_ANY_ID, + .hversion = HVERSION_ANY_ID, + .sversion = 0x73, + }, + { 0, } +}; + +MODULE_DEVICE_TABLE(parisc, hp_sdc_tbl); + +static int __init hp_sdc_init_hppa(struct parisc_device *d); +static struct delayed_work moduleloader_work; + +static struct parisc_driver hp_sdc_driver __refdata = { + .name = "hp_sdc", + .id_table = hp_sdc_tbl, + .probe = hp_sdc_init_hppa, +}; + +#endif /* __hppa__ */ + +static int __init hp_sdc_init(void) +{ + char *errstr; + hp_sdc_transaction t_sync; + uint8_t ts_sync[6]; + struct semaphore s_sync; + + rwlock_init(&hp_sdc.lock); + rwlock_init(&hp_sdc.ibf_lock); + rwlock_init(&hp_sdc.rtq_lock); + rwlock_init(&hp_sdc.hook_lock); + + hp_sdc.timer = NULL; + hp_sdc.hil = NULL; + hp_sdc.pup = NULL; + hp_sdc.cooked = NULL; + hp_sdc.im = HP_SDC_IM_MASK; /* Mask maskable irqs */ + hp_sdc.set_im = 1; + hp_sdc.wi = 0xff; + hp_sdc.r7[0] = 0xff; + hp_sdc.r7[1] = 0xff; + hp_sdc.r7[2] = 0xff; + hp_sdc.r7[3] = 0xff; + hp_sdc.ibf = 1; + + memset(&hp_sdc.tq, 0, sizeof(hp_sdc.tq)); + + hp_sdc.wcurr = -1; + hp_sdc.rcurr = -1; + hp_sdc.rqty = 0; + + hp_sdc.dev_err = -ENODEV; + + errstr = "IO not found for"; + if (!hp_sdc.base_io) + goto err0; + + errstr = "IRQ not found for"; + if (!hp_sdc.irq) + goto err0; + + hp_sdc.dev_err = -EBUSY; + +#if defined(__hppa__) + errstr = "IO not available for"; + if (request_region(hp_sdc.data_io, 2, hp_sdc_driver.name)) + goto err0; +#endif + + errstr = "IRQ not available for"; + if (request_irq(hp_sdc.irq, &hp_sdc_isr, IRQF_SHARED, + "HP SDC", &hp_sdc)) + goto err1; + + errstr = "NMI not available for"; + if (request_irq(hp_sdc.nmi, &hp_sdc_nmisr, IRQF_SHARED, + "HP SDC NMI", &hp_sdc)) + goto err2; + + pr_info(PREFIX "HP SDC at 0x%08lx, IRQ %d (NMI IRQ %d)\n", + hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi); + + hp_sdc_status_in8(); + hp_sdc_data_in8(); + + tasklet_init(&hp_sdc.task, hp_sdc_tasklet, 0); + + /* Sync the output buffer registers, thus scheduling hp_sdc_tasklet. */ + t_sync.actidx = 0; + t_sync.idx = 1; + t_sync.endidx = 6; + t_sync.seq = ts_sync; + ts_sync[0] = HP_SDC_ACT_DATAREG | HP_SDC_ACT_SEMAPHORE; + ts_sync[1] = 0x0f; + ts_sync[2] = ts_sync[3] = ts_sync[4] = ts_sync[5] = 0; + t_sync.act.semaphore = &s_sync; + sema_init(&s_sync, 0); + hp_sdc_enqueue_transaction(&t_sync); + down(&s_sync); /* Wait for t_sync to complete */ + + /* Create the keepalive task */ + timer_setup(&hp_sdc.kicker, hp_sdc_kicker, 0); + hp_sdc.kicker.expires = jiffies + HZ; + add_timer(&hp_sdc.kicker); + + hp_sdc.dev_err = 0; + return 0; + err2: + free_irq(hp_sdc.irq, &hp_sdc); + err1: + release_region(hp_sdc.data_io, 2); + err0: + printk(KERN_WARNING PREFIX ": %s SDC IO=0x%p IRQ=0x%x NMI=0x%x\n", + errstr, (void *)hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi); + hp_sdc.dev = NULL; + + return hp_sdc.dev_err; +} + +#if defined(__hppa__) + +static void request_module_delayed(struct work_struct *work) +{ + request_module("hp_sdc_mlc"); +} + +static int __init hp_sdc_init_hppa(struct parisc_device *d) +{ + int ret; + + if (!d) + return 1; + if (hp_sdc.dev != NULL) + return 1; /* We only expect one SDC */ + + hp_sdc.dev = d; + hp_sdc.irq = d->irq; + hp_sdc.nmi = d->aux_irq; + hp_sdc.base_io = d->hpa.start; + hp_sdc.data_io = d->hpa.start + 0x800; + hp_sdc.status_io = d->hpa.start + 0x801; + + INIT_DELAYED_WORK(&moduleloader_work, request_module_delayed); + + ret = hp_sdc_init(); + /* after successful initialization give SDC some time to settle + * and then load the hp_sdc_mlc upper layer driver */ + if (!ret) + schedule_delayed_work(&moduleloader_work, + msecs_to_jiffies(2000)); + + return ret; +} + +#endif /* __hppa__ */ + +static void hp_sdc_exit(void) +{ + /* do nothing if we don't have a SDC */ + if (!hp_sdc.dev) + return; + + write_lock_irq(&hp_sdc.lock); + + /* Turn off all maskable "sub-function" irq's. */ + hp_sdc_spin_ibf(); + sdc_writeb(HP_SDC_CMD_SET_IM | HP_SDC_IM_MASK, hp_sdc.status_io); + + /* Wait until we know this has been processed by the i8042 */ + hp_sdc_spin_ibf(); + + free_irq(hp_sdc.nmi, &hp_sdc); + free_irq(hp_sdc.irq, &hp_sdc); + write_unlock_irq(&hp_sdc.lock); + + del_timer_sync(&hp_sdc.kicker); + + tasklet_kill(&hp_sdc.task); + +#if defined(__hppa__) + cancel_delayed_work_sync(&moduleloader_work); + if (unregister_parisc_driver(&hp_sdc_driver)) + printk(KERN_WARNING PREFIX "Error unregistering HP SDC"); +#endif +} + +static int __init hp_sdc_register(void) +{ + hp_sdc_transaction tq_init; + uint8_t tq_init_seq[5]; + struct semaphore tq_init_sem; +#if defined(__mc68000__) + unsigned char i; +#endif + + if (hp_sdc_disabled) { + printk(KERN_WARNING PREFIX "HP SDC driver disabled by no_hpsdc=1.\n"); + return -ENODEV; + } + + hp_sdc.dev = NULL; + hp_sdc.dev_err = 0; +#if defined(__hppa__) + if (register_parisc_driver(&hp_sdc_driver)) { + printk(KERN_WARNING PREFIX "Error registering SDC with system bus tree.\n"); + return -ENODEV; + } +#elif defined(__mc68000__) + if (!MACH_IS_HP300) + return -ENODEV; + + hp_sdc.irq = 1; + hp_sdc.nmi = 7; + hp_sdc.base_io = (unsigned long) 0xf0428000; + hp_sdc.data_io = (unsigned long) hp_sdc.base_io + 1; + hp_sdc.status_io = (unsigned long) hp_sdc.base_io + 3; + if (!copy_from_kernel_nofault(&i, (unsigned char *)hp_sdc.data_io, 1)) + hp_sdc.dev = (void *)1; + hp_sdc.dev_err = hp_sdc_init(); +#endif + if (hp_sdc.dev == NULL) { + printk(KERN_WARNING PREFIX "No SDC found.\n"); + return hp_sdc.dev_err; + } + + sema_init(&tq_init_sem, 0); + + tq_init.actidx = 0; + tq_init.idx = 1; + tq_init.endidx = 5; + tq_init.seq = tq_init_seq; + tq_init.act.semaphore = &tq_init_sem; + + tq_init_seq[0] = + HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE; + tq_init_seq[1] = HP_SDC_CMD_READ_KCC; + tq_init_seq[2] = 1; + tq_init_seq[3] = 0; + tq_init_seq[4] = 0; + + hp_sdc_enqueue_transaction(&tq_init); + + down(&tq_init_sem); + up(&tq_init_sem); + + if ((tq_init_seq[0] & HP_SDC_ACT_DEAD) == HP_SDC_ACT_DEAD) { + printk(KERN_WARNING PREFIX "Error reading config byte.\n"); + hp_sdc_exit(); + return -ENODEV; + } + hp_sdc.r11 = tq_init_seq[4]; + if (hp_sdc.r11 & HP_SDC_CFG_NEW) { + const char *str; + printk(KERN_INFO PREFIX "New style SDC\n"); + tq_init_seq[1] = HP_SDC_CMD_READ_XTD; + tq_init.actidx = 0; + tq_init.idx = 1; + down(&tq_init_sem); + hp_sdc_enqueue_transaction(&tq_init); + down(&tq_init_sem); + up(&tq_init_sem); + if ((tq_init_seq[0] & HP_SDC_ACT_DEAD) == HP_SDC_ACT_DEAD) { + printk(KERN_WARNING PREFIX "Error reading extended config byte.\n"); + return -ENODEV; + } + hp_sdc.r7e = tq_init_seq[4]; + HP_SDC_XTD_REV_STRINGS(hp_sdc.r7e & HP_SDC_XTD_REV, str) + printk(KERN_INFO PREFIX "Revision: %s\n", str); + if (hp_sdc.r7e & HP_SDC_XTD_BEEPER) + printk(KERN_INFO PREFIX "TI SN76494 beeper present\n"); + if (hp_sdc.r7e & HP_SDC_XTD_BBRTC) + printk(KERN_INFO PREFIX "OKI MSM-58321 BBRTC present\n"); + printk(KERN_INFO PREFIX "Spunking the self test register to force PUP " + "on next firmware reset.\n"); + tq_init_seq[0] = HP_SDC_ACT_PRECMD | + HP_SDC_ACT_DATAOUT | HP_SDC_ACT_SEMAPHORE; + tq_init_seq[1] = HP_SDC_CMD_SET_STR; + tq_init_seq[2] = 1; + tq_init_seq[3] = 0; + tq_init.actidx = 0; + tq_init.idx = 1; + tq_init.endidx = 4; + down(&tq_init_sem); + hp_sdc_enqueue_transaction(&tq_init); + down(&tq_init_sem); + up(&tq_init_sem); + } else + printk(KERN_INFO PREFIX "Old style SDC (1820-%s).\n", + (hp_sdc.r11 & HP_SDC_CFG_REV) ? "3300" : "2564/3087"); + + return 0; +} + +module_init(hp_sdc_register); +module_exit(hp_sdc_exit); + +/* Timing notes: These measurements taken on my 64MHz 7100-LC (715/64) + * cycles cycles-adj time + * between two consecutive mfctl(16)'s: 4 n/a 63ns + * hp_sdc_spin_ibf when idle: 119 115 1.7us + * gsc_writeb status register: 83 79 1.2us + * IBF to clear after sending SET_IM: 6204 6006 93us + * IBF to clear after sending LOAD_RT: 4467 4352 68us + * IBF to clear after sending two LOAD_RTs: 18974 18859 295us + * READ_T1, read status/data, IRQ, call handler: 35564 n/a 556us + * cmd to ~IBF READ_T1 2nd time right after: 5158403 n/a 81ms + * between IRQ received and ~IBF for above: 2578877 n/a 40ms + * + * Performance stats after a run of this module configuring HIL and + * receiving a few mouse events: + * + * status in8 282508 cycles 7128 calls + * status out8 8404 cycles 341 calls + * data out8 1734 cycles 78 calls + * isr 174324 cycles 617 calls (includes take) + * take 1241 cycles 2 calls + * put 1411504 cycles 6937 calls + * task 1655209 cycles 6937 calls (includes put) + * + */ diff --git a/drivers/input/serio/hp_sdc_mlc.c b/drivers/input/serio/hp_sdc_mlc.c new file mode 100644 index 000000000..3e85e9039 --- /dev/null +++ b/drivers/input/serio/hp_sdc_mlc.c @@ -0,0 +1,355 @@ +/* + * Access to HP-HIL MLC through HP System Device Controller. + * + * Copyright (c) 2001 Brian S. Julin + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * + * References: + * HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A + * System Device Controller Microprocessor Firmware Theory of Operation + * for Part Number 1820-4784 Revision B. Dwg No. A-1820-4784-2 + * + */ + +#include <linux/hil_mlc.h> +#include <linux/hp_sdc.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/semaphore.h> + +#define PREFIX "HP SDC MLC: " + +static hil_mlc hp_sdc_mlc; + +MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>"); +MODULE_DESCRIPTION("Glue for onboard HIL MLC in HP-PARISC machines"); +MODULE_LICENSE("Dual BSD/GPL"); + +static struct hp_sdc_mlc_priv_s { + int emtestmode; + hp_sdc_transaction trans; + u8 tseq[16]; + int got5x; +} hp_sdc_mlc_priv; + +/************************* Interrupt context ******************************/ +static void hp_sdc_mlc_isr (int irq, void *dev_id, + uint8_t status, uint8_t data) +{ + int idx; + hil_mlc *mlc = &hp_sdc_mlc; + + write_lock(&mlc->lock); + if (mlc->icount < 0) { + printk(KERN_WARNING PREFIX "HIL Overflow!\n"); + up(&mlc->isem); + goto out; + } + idx = 15 - mlc->icount; + if ((status & HP_SDC_STATUS_IRQMASK) == HP_SDC_STATUS_HILDATA) { + mlc->ipacket[idx] |= data | HIL_ERR_INT; + mlc->icount--; + if (hp_sdc_mlc_priv.got5x || !idx) + goto check; + if ((mlc->ipacket[idx - 1] & HIL_PKT_ADDR_MASK) != + (mlc->ipacket[idx] & HIL_PKT_ADDR_MASK)) { + mlc->ipacket[idx] &= ~HIL_PKT_ADDR_MASK; + mlc->ipacket[idx] |= (mlc->ipacket[idx - 1] + & HIL_PKT_ADDR_MASK); + } + goto check; + } + /* We know status is 5X */ + if (data & HP_SDC_HIL_ISERR) + goto err; + mlc->ipacket[idx] = + (data & HP_SDC_HIL_R1MASK) << HIL_PKT_ADDR_SHIFT; + hp_sdc_mlc_priv.got5x = 1; + goto out; + + check: + hp_sdc_mlc_priv.got5x = 0; + if (mlc->imatch == 0) + goto done; + if ((mlc->imatch == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) + && (mlc->ipacket[idx] == (mlc->imatch | idx))) + goto done; + if (mlc->ipacket[idx] == mlc->imatch) + goto done; + goto out; + + err: + printk(KERN_DEBUG PREFIX "err code %x\n", data); + + switch (data) { + case HP_SDC_HIL_RC_DONE: + printk(KERN_WARNING PREFIX "Bastard SDC reconfigured loop!\n"); + break; + + case HP_SDC_HIL_ERR: + mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_PERR | + HIL_ERR_FERR | HIL_ERR_FOF; + break; + + case HP_SDC_HIL_TO: + mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_LERR; + break; + + case HP_SDC_HIL_RC: + printk(KERN_WARNING PREFIX "Bastard SDC decided to reconfigure loop!\n"); + break; + + default: + printk(KERN_WARNING PREFIX "Unknown HIL Error status (%x)!\n", data); + break; + } + + /* No more data will be coming due to an error. */ + done: + tasklet_schedule(mlc->tasklet); + up(&mlc->isem); + out: + write_unlock(&mlc->lock); +} + + +/******************** Tasklet or userspace context functions ****************/ + +static int hp_sdc_mlc_in(hil_mlc *mlc, suseconds_t timeout) +{ + struct hp_sdc_mlc_priv_s *priv; + int rc = 2; + + priv = mlc->priv; + + /* Try to down the semaphore */ + if (down_trylock(&mlc->isem)) { + if (priv->emtestmode) { + mlc->ipacket[0] = + HIL_ERR_INT | (mlc->opacket & + (HIL_PKT_CMD | + HIL_PKT_ADDR_MASK | + HIL_PKT_DATA_MASK)); + mlc->icount = 14; + /* printk(KERN_DEBUG PREFIX ">[%x]\n", mlc->ipacket[0]); */ + goto wasup; + } + if (time_after(jiffies, mlc->instart + mlc->intimeout)) { + /* printk("!%i %i", + tv.tv_usec - mlc->instart.tv_usec, + mlc->intimeout); + */ + rc = 1; + up(&mlc->isem); + } + goto done; + } + wasup: + up(&mlc->isem); + rc = 0; + done: + return rc; +} + +static int hp_sdc_mlc_cts(hil_mlc *mlc) +{ + struct hp_sdc_mlc_priv_s *priv; + + priv = mlc->priv; + + /* Try to down the semaphores -- they should be up. */ + BUG_ON(down_trylock(&mlc->isem)); + BUG_ON(down_trylock(&mlc->osem)); + + up(&mlc->isem); + up(&mlc->osem); + + if (down_trylock(&mlc->csem)) { + if (priv->trans.act.semaphore != &mlc->csem) + goto poll; + else + goto busy; + } + + if (!(priv->tseq[4] & HP_SDC_USE_LOOP)) + goto done; + + poll: + priv->trans.act.semaphore = &mlc->csem; + priv->trans.actidx = 0; + priv->trans.idx = 1; + priv->trans.endidx = 5; + priv->tseq[0] = + HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE; + priv->tseq[1] = HP_SDC_CMD_READ_USE; + priv->tseq[2] = 1; + priv->tseq[3] = 0; + priv->tseq[4] = 0; + return __hp_sdc_enqueue_transaction(&priv->trans); + busy: + return 1; + done: + priv->trans.act.semaphore = &mlc->osem; + up(&mlc->csem); + return 0; +} + +static int hp_sdc_mlc_out(hil_mlc *mlc) +{ + struct hp_sdc_mlc_priv_s *priv; + + priv = mlc->priv; + + /* Try to down the semaphore -- it should be up. */ + BUG_ON(down_trylock(&mlc->osem)); + + if (mlc->opacket & HIL_DO_ALTER_CTRL) + goto do_control; + + do_data: + if (priv->emtestmode) { + up(&mlc->osem); + return 0; + } + /* Shouldn't be sending commands when loop may be busy */ + BUG_ON(down_trylock(&mlc->csem)); + up(&mlc->csem); + + priv->trans.actidx = 0; + priv->trans.idx = 1; + priv->trans.act.semaphore = &mlc->osem; + priv->trans.endidx = 6; + priv->tseq[0] = + HP_SDC_ACT_DATAREG | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_SEMAPHORE; + priv->tseq[1] = 0x7; + priv->tseq[2] = + (mlc->opacket & + (HIL_PKT_ADDR_MASK | HIL_PKT_CMD)) + >> HIL_PKT_ADDR_SHIFT; + priv->tseq[3] = + (mlc->opacket & HIL_PKT_DATA_MASK) + >> HIL_PKT_DATA_SHIFT; + priv->tseq[4] = 0; /* No timeout */ + if (priv->tseq[3] == HIL_CMD_DHR) + priv->tseq[4] = 1; + priv->tseq[5] = HP_SDC_CMD_DO_HIL; + goto enqueue; + + do_control: + priv->emtestmode = mlc->opacket & HIL_CTRL_TEST; + + /* we cannot emulate this, it should not be used. */ + BUG_ON((mlc->opacket & (HIL_CTRL_APE | HIL_CTRL_IPF)) == HIL_CTRL_APE); + + if ((mlc->opacket & HIL_CTRL_ONLY) == HIL_CTRL_ONLY) + goto control_only; + + /* Should not send command/data after engaging APE */ + BUG_ON(mlc->opacket & HIL_CTRL_APE); + + /* Disengaging APE this way would not be valid either since + * the loop must be allowed to idle. + * + * So, it works out that we really never actually send control + * and data when using SDC, we just send the data. + */ + goto do_data; + + control_only: + priv->trans.actidx = 0; + priv->trans.idx = 1; + priv->trans.act.semaphore = &mlc->osem; + priv->trans.endidx = 4; + priv->tseq[0] = + HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT | HP_SDC_ACT_SEMAPHORE; + priv->tseq[1] = HP_SDC_CMD_SET_LPC; + priv->tseq[2] = 1; + /* priv->tseq[3] = (mlc->ddc + 1) | HP_SDC_LPS_ACSUCC; */ + priv->tseq[3] = 0; + if (mlc->opacket & HIL_CTRL_APE) { + priv->tseq[3] |= HP_SDC_LPC_APE_IPF; + BUG_ON(down_trylock(&mlc->csem)); + } + enqueue: + return hp_sdc_enqueue_transaction(&priv->trans); +} + +static int __init hp_sdc_mlc_init(void) +{ + hil_mlc *mlc = &hp_sdc_mlc; + int err; + +#ifdef __mc68000__ + if (!MACH_IS_HP300) + return -ENODEV; +#endif + + printk(KERN_INFO PREFIX "Registering the System Domain Controller's HIL MLC.\n"); + + hp_sdc_mlc_priv.emtestmode = 0; + hp_sdc_mlc_priv.trans.seq = hp_sdc_mlc_priv.tseq; + hp_sdc_mlc_priv.trans.act.semaphore = &mlc->osem; + hp_sdc_mlc_priv.got5x = 0; + + mlc->cts = &hp_sdc_mlc_cts; + mlc->in = &hp_sdc_mlc_in; + mlc->out = &hp_sdc_mlc_out; + mlc->priv = &hp_sdc_mlc_priv; + + err = hil_mlc_register(mlc); + if (err) { + printk(KERN_WARNING PREFIX "Failed to register MLC structure with hil_mlc\n"); + return err; + } + + if (hp_sdc_request_hil_irq(&hp_sdc_mlc_isr)) { + printk(KERN_WARNING PREFIX "Request for raw HIL ISR hook denied\n"); + if (hil_mlc_unregister(mlc)) + printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n" + "This is bad. Could cause an oops.\n"); + return -EBUSY; + } + + return 0; +} + +static void __exit hp_sdc_mlc_exit(void) +{ + hil_mlc *mlc = &hp_sdc_mlc; + + if (hp_sdc_release_hil_irq(&hp_sdc_mlc_isr)) + printk(KERN_ERR PREFIX "Failed to release the raw HIL ISR hook.\n" + "This is bad. Could cause an oops.\n"); + + if (hil_mlc_unregister(mlc)) + printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n" + "This is bad. Could cause an oops.\n"); +} + +module_init(hp_sdc_mlc_init); +module_exit(hp_sdc_mlc_exit); diff --git a/drivers/input/serio/hyperv-keyboard.c b/drivers/input/serio/hyperv-keyboard.c new file mode 100644 index 000000000..d62aefb2e --- /dev/null +++ b/drivers/input/serio/hyperv-keyboard.c @@ -0,0 +1,442 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2013, Microsoft Corporation. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/completion.h> +#include <linux/hyperv.h> +#include <linux/serio.h> +#include <linux/slab.h> + +/* + * Current version 1.0 + * + */ +#define SYNTH_KBD_VERSION_MAJOR 1 +#define SYNTH_KBD_VERSION_MINOR 0 +#define SYNTH_KBD_VERSION (SYNTH_KBD_VERSION_MINOR | \ + (SYNTH_KBD_VERSION_MAJOR << 16)) + + +/* + * Message types in the synthetic input protocol + */ +enum synth_kbd_msg_type { + SYNTH_KBD_PROTOCOL_REQUEST = 1, + SYNTH_KBD_PROTOCOL_RESPONSE = 2, + SYNTH_KBD_EVENT = 3, + SYNTH_KBD_LED_INDICATORS = 4, +}; + +/* + * Basic message structures. + */ +struct synth_kbd_msg_hdr { + __le32 type; +}; + +struct synth_kbd_msg { + struct synth_kbd_msg_hdr header; + char data[]; /* Enclosed message */ +}; + +union synth_kbd_version { + __le32 version; +}; + +/* + * Protocol messages + */ +struct synth_kbd_protocol_request { + struct synth_kbd_msg_hdr header; + union synth_kbd_version version_requested; +}; + +#define PROTOCOL_ACCEPTED BIT(0) +struct synth_kbd_protocol_response { + struct synth_kbd_msg_hdr header; + __le32 proto_status; +}; + +#define IS_UNICODE BIT(0) +#define IS_BREAK BIT(1) +#define IS_E0 BIT(2) +#define IS_E1 BIT(3) +struct synth_kbd_keystroke { + struct synth_kbd_msg_hdr header; + __le16 make_code; + __le16 reserved0; + __le32 info; /* Additional information */ +}; + + +#define HK_MAXIMUM_MESSAGE_SIZE 256 + +#define KBD_VSC_SEND_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024) +#define KBD_VSC_RECV_RING_BUFFER_SIZE VMBUS_RING_SIZE(36 * 1024) + +#define XTKBD_EMUL0 0xe0 +#define XTKBD_EMUL1 0xe1 +#define XTKBD_RELEASE 0x80 + + +/* + * Represents a keyboard device + */ +struct hv_kbd_dev { + struct hv_device *hv_dev; + struct serio *hv_serio; + struct synth_kbd_protocol_request protocol_req; + struct synth_kbd_protocol_response protocol_resp; + /* Synchronize the request/response if needed */ + struct completion wait_event; + spinlock_t lock; /* protects 'started' field */ + bool started; +}; + +static void hv_kbd_on_receive(struct hv_device *hv_dev, + struct synth_kbd_msg *msg, u32 msg_length) +{ + struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev); + struct synth_kbd_keystroke *ks_msg; + unsigned long flags; + u32 msg_type = __le32_to_cpu(msg->header.type); + u32 info; + u16 scan_code; + + switch (msg_type) { + case SYNTH_KBD_PROTOCOL_RESPONSE: + /* + * Validate the information provided by the host. + * If the host is giving us a bogus packet, + * drop the packet (hoping the problem + * goes away). + */ + if (msg_length < sizeof(struct synth_kbd_protocol_response)) { + dev_err(&hv_dev->device, + "Illegal protocol response packet (len: %d)\n", + msg_length); + break; + } + + memcpy(&kbd_dev->protocol_resp, msg, + sizeof(struct synth_kbd_protocol_response)); + complete(&kbd_dev->wait_event); + break; + + case SYNTH_KBD_EVENT: + /* + * Validate the information provided by the host. + * If the host is giving us a bogus packet, + * drop the packet (hoping the problem + * goes away). + */ + if (msg_length < sizeof(struct synth_kbd_keystroke)) { + dev_err(&hv_dev->device, + "Illegal keyboard event packet (len: %d)\n", + msg_length); + break; + } + + ks_msg = (struct synth_kbd_keystroke *)msg; + info = __le32_to_cpu(ks_msg->info); + + /* + * Inject the information through the serio interrupt. + */ + spin_lock_irqsave(&kbd_dev->lock, flags); + if (kbd_dev->started) { + if (info & IS_E0) + serio_interrupt(kbd_dev->hv_serio, + XTKBD_EMUL0, 0); + if (info & IS_E1) + serio_interrupt(kbd_dev->hv_serio, + XTKBD_EMUL1, 0); + scan_code = __le16_to_cpu(ks_msg->make_code); + if (info & IS_BREAK) + scan_code |= XTKBD_RELEASE; + + serio_interrupt(kbd_dev->hv_serio, scan_code, 0); + } + spin_unlock_irqrestore(&kbd_dev->lock, flags); + + /* + * Only trigger a wakeup on key down, otherwise + * "echo freeze > /sys/power/state" can't really enter the + * state because the Enter-UP can trigger a wakeup at once. + */ + if (!(info & IS_BREAK)) + pm_wakeup_hard_event(&hv_dev->device); + + break; + + default: + dev_err(&hv_dev->device, + "unhandled message type %d\n", msg_type); + } +} + +static void hv_kbd_handle_received_packet(struct hv_device *hv_dev, + struct vmpacket_descriptor *desc, + u32 bytes_recvd, + u64 req_id) +{ + struct synth_kbd_msg *msg; + u32 msg_sz; + + switch (desc->type) { + case VM_PKT_COMP: + break; + + case VM_PKT_DATA_INBAND: + /* + * We have a packet that has "inband" data. The API used + * for retrieving the packet guarantees that the complete + * packet is read. So, minimally, we should be able to + * parse the payload header safely (assuming that the host + * can be trusted. Trusting the host seems to be a + * reasonable assumption because in a virtualized + * environment there is not whole lot you can do if you + * don't trust the host. + * + * Nonetheless, let us validate if the host can be trusted + * (in a trivial way). The interesting aspect of this + * validation is how do you recover if we discover that the + * host is not to be trusted? Simply dropping the packet, I + * don't think is an appropriate recovery. In the interest + * of failing fast, it may be better to crash the guest. + * For now, I will just drop the packet! + */ + + msg_sz = bytes_recvd - (desc->offset8 << 3); + if (msg_sz <= sizeof(struct synth_kbd_msg_hdr)) { + /* + * Drop the packet and hope + * the problem magically goes away. + */ + dev_err(&hv_dev->device, + "Illegal packet (type: %d, tid: %llx, size: %d)\n", + desc->type, req_id, msg_sz); + break; + } + + msg = (void *)desc + (desc->offset8 << 3); + hv_kbd_on_receive(hv_dev, msg, msg_sz); + break; + + default: + dev_err(&hv_dev->device, + "unhandled packet type %d, tid %llx len %d\n", + desc->type, req_id, bytes_recvd); + break; + } +} + +static void hv_kbd_on_channel_callback(void *context) +{ + struct vmpacket_descriptor *desc; + struct hv_device *hv_dev = context; + u32 bytes_recvd; + u64 req_id; + + foreach_vmbus_pkt(desc, hv_dev->channel) { + bytes_recvd = desc->len8 * 8; + req_id = desc->trans_id; + + hv_kbd_handle_received_packet(hv_dev, desc, bytes_recvd, + req_id); + } +} + +static int hv_kbd_connect_to_vsp(struct hv_device *hv_dev) +{ + struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev); + struct synth_kbd_protocol_request *request; + struct synth_kbd_protocol_response *response; + u32 proto_status; + int error; + + reinit_completion(&kbd_dev->wait_event); + + request = &kbd_dev->protocol_req; + memset(request, 0, sizeof(struct synth_kbd_protocol_request)); + request->header.type = __cpu_to_le32(SYNTH_KBD_PROTOCOL_REQUEST); + request->version_requested.version = __cpu_to_le32(SYNTH_KBD_VERSION); + + error = vmbus_sendpacket(hv_dev->channel, request, + sizeof(struct synth_kbd_protocol_request), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + if (error) + return error; + + if (!wait_for_completion_timeout(&kbd_dev->wait_event, 10 * HZ)) + return -ETIMEDOUT; + + response = &kbd_dev->protocol_resp; + proto_status = __le32_to_cpu(response->proto_status); + if (!(proto_status & PROTOCOL_ACCEPTED)) { + dev_err(&hv_dev->device, + "synth_kbd protocol request failed (version %d)\n", + SYNTH_KBD_VERSION); + return -ENODEV; + } + + return 0; +} + +static int hv_kbd_start(struct serio *serio) +{ + struct hv_kbd_dev *kbd_dev = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&kbd_dev->lock, flags); + kbd_dev->started = true; + spin_unlock_irqrestore(&kbd_dev->lock, flags); + + return 0; +} + +static void hv_kbd_stop(struct serio *serio) +{ + struct hv_kbd_dev *kbd_dev = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&kbd_dev->lock, flags); + kbd_dev->started = false; + spin_unlock_irqrestore(&kbd_dev->lock, flags); +} + +static int hv_kbd_probe(struct hv_device *hv_dev, + const struct hv_vmbus_device_id *dev_id) +{ + struct hv_kbd_dev *kbd_dev; + struct serio *hv_serio; + int error; + + kbd_dev = kzalloc(sizeof(struct hv_kbd_dev), GFP_KERNEL); + hv_serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!kbd_dev || !hv_serio) { + error = -ENOMEM; + goto err_free_mem; + } + + kbd_dev->hv_dev = hv_dev; + kbd_dev->hv_serio = hv_serio; + spin_lock_init(&kbd_dev->lock); + init_completion(&kbd_dev->wait_event); + hv_set_drvdata(hv_dev, kbd_dev); + + hv_serio->dev.parent = &hv_dev->device; + hv_serio->id.type = SERIO_8042_XL; + hv_serio->port_data = kbd_dev; + strscpy(hv_serio->name, dev_name(&hv_dev->device), + sizeof(hv_serio->name)); + strscpy(hv_serio->phys, dev_name(&hv_dev->device), + sizeof(hv_serio->phys)); + + hv_serio->start = hv_kbd_start; + hv_serio->stop = hv_kbd_stop; + + error = vmbus_open(hv_dev->channel, + KBD_VSC_SEND_RING_BUFFER_SIZE, + KBD_VSC_RECV_RING_BUFFER_SIZE, + NULL, 0, + hv_kbd_on_channel_callback, + hv_dev); + if (error) + goto err_free_mem; + + error = hv_kbd_connect_to_vsp(hv_dev); + if (error) + goto err_close_vmbus; + + serio_register_port(kbd_dev->hv_serio); + + device_init_wakeup(&hv_dev->device, true); + + return 0; + +err_close_vmbus: + vmbus_close(hv_dev->channel); +err_free_mem: + kfree(hv_serio); + kfree(kbd_dev); + return error; +} + +static int hv_kbd_remove(struct hv_device *hv_dev) +{ + struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev); + + serio_unregister_port(kbd_dev->hv_serio); + vmbus_close(hv_dev->channel); + kfree(kbd_dev); + + hv_set_drvdata(hv_dev, NULL); + + return 0; +} + +static int hv_kbd_suspend(struct hv_device *hv_dev) +{ + vmbus_close(hv_dev->channel); + + return 0; +} + +static int hv_kbd_resume(struct hv_device *hv_dev) +{ + int ret; + + ret = vmbus_open(hv_dev->channel, + KBD_VSC_SEND_RING_BUFFER_SIZE, + KBD_VSC_RECV_RING_BUFFER_SIZE, + NULL, 0, + hv_kbd_on_channel_callback, + hv_dev); + if (ret == 0) + ret = hv_kbd_connect_to_vsp(hv_dev); + + return ret; +} + +static const struct hv_vmbus_device_id id_table[] = { + /* Keyboard guid */ + { HV_KBD_GUID, }, + { }, +}; + +MODULE_DEVICE_TABLE(vmbus, id_table); + +static struct hv_driver hv_kbd_drv = { + .name = KBUILD_MODNAME, + .id_table = id_table, + .probe = hv_kbd_probe, + .remove = hv_kbd_remove, + .suspend = hv_kbd_suspend, + .resume = hv_kbd_resume, + .driver = { + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; + +static int __init hv_kbd_init(void) +{ + return vmbus_driver_register(&hv_kbd_drv); +} + +static void __exit hv_kbd_exit(void) +{ + vmbus_driver_unregister(&hv_kbd_drv); +} + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Keyboard Driver"); + +module_init(hv_kbd_init); +module_exit(hv_kbd_exit); diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h new file mode 100644 index 000000000..b585b1dab --- /dev/null +++ b/drivers/input/serio/i8042-acpipnpio.h @@ -0,0 +1,1740 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_ACPIPNPIO_H +#define _I8042_ACPIPNPIO_H + +#include <linux/acpi.h> + +#ifdef CONFIG_X86 +#include <asm/x86_init.h> +#endif + +/* + * Names. + */ + +#define I8042_KBD_PHYS_DESC "isa0060/serio0" +#define I8042_AUX_PHYS_DESC "isa0060/serio1" +#define I8042_MUX_PHYS_DESC "isa0060/serio%d" + +/* + * IRQs. + */ + +#if defined(__ia64__) +# define I8042_MAP_IRQ(x) isa_irq_to_vector((x)) +#else +# define I8042_MAP_IRQ(x) (x) +#endif + +#define I8042_KBD_IRQ i8042_kbd_irq +#define I8042_AUX_IRQ i8042_aux_irq + +static int i8042_kbd_irq; +static int i8042_aux_irq; + +/* + * Register numbers. + */ + +#define I8042_COMMAND_REG i8042_command_reg +#define I8042_STATUS_REG i8042_command_reg +#define I8042_DATA_REG i8042_data_reg + +static int i8042_command_reg = 0x64; +static int i8042_data_reg = 0x60; + + +static inline int i8042_read_data(void) +{ + return inb(I8042_DATA_REG); +} + +static inline int i8042_read_status(void) +{ + return inb(I8042_STATUS_REG); +} + +static inline void i8042_write_data(int val) +{ + outb(val, I8042_DATA_REG); +} + +static inline void i8042_write_command(int val) +{ + outb(val, I8042_COMMAND_REG); +} + +#ifdef CONFIG_X86 + +#include <linux/dmi.h> + +#define SERIO_QUIRK_NOKBD BIT(0) +#define SERIO_QUIRK_NOAUX BIT(1) +#define SERIO_QUIRK_NOMUX BIT(2) +#define SERIO_QUIRK_FORCEMUX BIT(3) +#define SERIO_QUIRK_UNLOCK BIT(4) +#define SERIO_QUIRK_PROBE_DEFER BIT(5) +#define SERIO_QUIRK_RESET_ALWAYS BIT(6) +#define SERIO_QUIRK_RESET_NEVER BIT(7) +#define SERIO_QUIRK_DIECT BIT(8) +#define SERIO_QUIRK_DUMBKBD BIT(9) +#define SERIO_QUIRK_NOLOOP BIT(10) +#define SERIO_QUIRK_NOTIMEOUT BIT(11) +#define SERIO_QUIRK_KBDRESET BIT(12) +#define SERIO_QUIRK_DRITEK BIT(13) +#define SERIO_QUIRK_NOPNP BIT(14) + +/* Quirk table for different mainboards. Options similar or identical to i8042 + * module parameters. + * ORDERING IS IMPORTANT! The first match will be apllied and the rest ignored. + * This allows entries to overwrite vendor wide quirks on a per device basis. + * Where this is irrelevant, entries are sorted case sensitive by DMI_SYS_VENDOR + * and/or DMI_BOARD_VENDOR to make it easier to avoid dublicate entries. + */ +static const struct dmi_system_id i8042_dmi_quirk_table[] __initconst = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ALIENWARE"), + DMI_MATCH(DMI_PRODUCT_NAME, "Sentia"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X750LN"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Asus X450LCP */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "X450LCP"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_NEVER) + }, + { + /* ASUS ZenBook UX425UA/QA */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX425"), + }, + .driver_data = (void *)(SERIO_QUIRK_PROBE_DEFER | SERIO_QUIRK_RESET_NEVER) + }, + { + /* ASUS ZenBook UM325UA/QA */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325"), + }, + .driver_data = (void *)(SERIO_QUIRK_PROBE_DEFER | SERIO_QUIRK_RESET_NEVER) + }, + /* + * On some Asus laptops, just running self tests cause problems. + */ + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */ + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_NEVER) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_CHASSIS_TYPE, "31"), /* Convertible Notebook */ + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_NEVER) + }, + { + /* ASUS P65UP5 - AUX LOOP command does not raise AUX IRQ */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), + DMI_MATCH(DMI_BOARD_NAME, "P/I-P65UP5"), + DMI_MATCH(DMI_BOARD_VERSION, "REV 2.X"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* ASUS G1S */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_BOARD_NAME, "G1S"), + DMI_MATCH(DMI_BOARD_VERSION, "1.0"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Acer Aspire 5710 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Acer Aspire 7738 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7738"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Acer Aspire 5536 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5536"), + DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * Acer Aspire 5738z + * Touchpad stops working in mux mode when dis- + re-enabled + * with the touchpad enable/disable toggle hotkey + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Acer Aspire One 150 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Acer Aspire One 532h */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "AO532h"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A114-31"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A314-31"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A315-31"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire ES1-132"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire ES1-332"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire ES1-432"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate Spin B118-RN"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + /* + * Some Wistron based laptops need us to explicitly enable the 'Dritek + * keyboard extension' to make their extra keys start generating scancodes. + * Originally, this was just confined to older laptops, but a few Acer laptops + * have turned up in 2007 that also need this again. + */ + { + /* Acer Aspire 5100 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 5610 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 5630 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 5650 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 5680 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 5720 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer Aspire 9110 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer TravelMate 660 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer TravelMate 2490 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer TravelMate 4280 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4280"), + }, + .driver_data = (void *)(SERIO_QUIRK_DRITEK) + }, + { + /* Acer TravelMate P459-G2-M */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate P459-G2-M"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Amoi M636/A737 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Amoi Electronics CO.,LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "M636/A737 platform"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ByteSpeed LLC"), + DMI_MATCH(DMI_PRODUCT_NAME, "ByteSpeed Laptop C15B"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Compal HEL80I */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "COMPAL"), + DMI_MATCH(DMI_PRODUCT_NAME, "HEL80I"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), + DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant"), + DMI_MATCH(DMI_PRODUCT_VERSION, "8500"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), + DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant"), + DMI_MATCH(DMI_PRODUCT_VERSION, "DL760"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Advent 4211 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "DIXONSXP"), + DMI_MATCH(DMI_PRODUCT_NAME, "Advent 4211"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Dell Embedded Box PC 3000 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Embedded Box PC 3000"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Dell XPS M1530 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "XPS M1530"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Dell Vostro 1510 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro1510"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Dell Vostro V13 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V13"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Dell Vostro 1320 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 1320"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Dell Vostro 1520 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 1520"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Dell Vostro 1720 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 1720"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Entroware Proteus */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Entroware"), + DMI_MATCH(DMI_PRODUCT_NAME, "Proteus"), + DMI_MATCH(DMI_PRODUCT_VERSION, "EL07R4"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS) + }, + /* + * Some Fujitsu notebooks are having trouble with touchpads if + * active multiplexing mode is activated. Luckily they don't have + * external PS/2 ports so we can safely disable it. + * ... apparently some Toshibas don't like MUX mode either and + * die horrible death on reboot. + */ + { + /* Fujitsu Lifebook P7010/P7010D */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "P7010"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook P5020D */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P Series"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook S2000 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook S Series"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook S6230 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook S6230"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook T725 laptop */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK T725"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Fujitsu Lifebook U745 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu T70H */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "FMVLT70H"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu A544 laptop */ + /* https://bugzilla.redhat.com/show_bug.cgi?id=1111138 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK A544"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Fujitsu AH544 laptop */ + /* https://bugzilla.kernel.org/show_bug.cgi?id=69731 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK AH544"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Fujitsu U574 laptop */ + /* https://bugzilla.kernel.org/show_bug.cgi?id=69731 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U574"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Fujitsu UH554 laptop */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK UH544"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOTIMEOUT) + }, + { + /* Fujitsu Lifebook P7010 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "0000000000"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu-Siemens Lifebook T3010 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK T3010"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu-Siemens Lifebook E4010 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E4010"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu-Siemens Amilo Pro 2010 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2010"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu-Siemens Amilo Pro 2030 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook A574/H */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), + DMI_MATCH(DMI_PRODUCT_NAME, "FMVA0501PZ"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Fujitsu Lifebook E5411 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU CLIENT COMPUTING LIMITED"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E5411"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOAUX) + }, + { + /* Gigabyte M912 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "M912"), + DMI_MATCH(DMI_PRODUCT_VERSION, "01"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Gigabyte Spring Peak - defines wrong chassis type */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "Spring Peak"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Gigabyte T1005 - defines wrong chassis type ("Other") */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "T1005"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Gigabyte T1005M/P - defines wrong chassis type ("Other") */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "T1005M/P"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + /* + * Some laptops need keyboard reset before probing for the trackpad to get + * it detected, initialised & finally work. + */ + { + /* Gigabyte P35 v2 - Elantech touchpad */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "P35V2"), + }, + .driver_data = (void *)(SERIO_QUIRK_KBDRESET) + }, + { + /* Aorus branded Gigabyte X3 Plus - Elantech touchpad */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "X3"), + }, + .driver_data = (void *)(SERIO_QUIRK_KBDRESET) + }, + { + /* Gigabyte P34 - Elantech touchpad */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "P34"), + }, + .driver_data = (void *)(SERIO_QUIRK_KBDRESET) + }, + { + /* Gigabyte P57 - Elantech touchpad */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), + DMI_MATCH(DMI_PRODUCT_NAME, "P57"), + }, + .driver_data = (void *)(SERIO_QUIRK_KBDRESET) + }, + { + /* Gericom Bellagio */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Gericom"), + DMI_MATCH(DMI_PRODUCT_NAME, "N34AS6"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Gigabyte M1022M netbook */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co.,Ltd."), + DMI_MATCH(DMI_BOARD_NAME, "M1022E"), + DMI_MATCH(DMI_BOARD_VERSION, "1.02"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv9700"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Rev 1"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* + * HP Pavilion DV4017EA - + * errors on MUX ports are reported without raising AUXDATA + * causing "spurious NAK" messages. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "Pavilion dv4000 (EA032EA#ABF)"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * HP Pavilion ZT1000 - + * like DV4017EA does not raise AUXERR for errors on MUX ports. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion Notebook PC"), + DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook ZT1000"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * HP Pavilion DV4270ca - + * like DV4017EA does not raise AUXERR for errors on MUX ports. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "Pavilion dv4000 (EH476UA#ABL)"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Newer HP Pavilion dv4 models */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv4 Notebook PC"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_NOTIMEOUT) + }, + { + /* IBM 2656 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "IBM"), + DMI_MATCH(DMI_PRODUCT_NAME, "2656"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Avatar AVIU-145A6 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel"), + DMI_MATCH(DMI_PRODUCT_NAME, "IC4I"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Intel MBO Desktop D845PESV */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"), + DMI_MATCH(DMI_BOARD_NAME, "D845PESV"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOPNP) + }, + { + /* + * Intel NUC D54250WYK - does not have i8042 controller but + * declares PS/2 devices in DSDT. + */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"), + DMI_MATCH(DMI_BOARD_NAME, "D54250WYK"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOPNP) + }, + { + /* Lenovo 3000 n100 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "076804U"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Lenovo XiaoXin Air 12 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "80UN"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Lenovo LaVie Z */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo LaVie Z"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Lenovo Ideapad U455 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "20046"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Lenovo ThinkPad L460 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L460"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Lenovo ThinkPad Twist S230u */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "33474HU"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* LG Electronics X110 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LG Electronics Inc."), + DMI_MATCH(DMI_BOARD_NAME, "X110"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Medion Akoya Mini E1210 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E1210"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* Medion Akoya E1222 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), + DMI_MATCH(DMI_PRODUCT_NAME, "E122X"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + { + /* MSI Wind U-100 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"), + DMI_MATCH(DMI_BOARD_NAME, "U-100"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS | SERIO_QUIRK_NOPNP) + }, + { + /* + * No data is coming from the touchscreen unless KBC + * is in legacy mode. + */ + /* Panasonic CF-29 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Matsushita"), + DMI_MATCH(DMI_PRODUCT_NAME, "CF-29"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Medion Akoya E7225 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Medion"), + DMI_MATCH(DMI_PRODUCT_NAME, "Akoya E7225"), + DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Microsoft Virtual Machine */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), + DMI_MATCH(DMI_PRODUCT_VERSION, "VS2005R2"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Medion MAM 2070 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_PRODUCT_NAME, "MAM 2070"), + DMI_MATCH(DMI_PRODUCT_VERSION, "5a"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* TUXEDO BU1406 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_PRODUCT_NAME, "N24_25BU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* OQO Model 01 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "OQO"), + DMI_MATCH(DMI_PRODUCT_NAME, "ZEPTO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "00"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "PEGATRON CORPORATION"), + DMI_MATCH(DMI_PRODUCT_NAME, "C15B"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Acer Aspire 5 A515 */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "PK"), + DMI_MATCH(DMI_BOARD_NAME, "Grumpy_PK"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOPNP) + }, + { + /* ULI EV4873 - AUX LOOP does not work properly */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ULI"), + DMI_MATCH(DMI_PRODUCT_NAME, "EV4873"), + DMI_MATCH(DMI_PRODUCT_VERSION, "5a"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* + * Arima-Rioworks HDAMB - + * AUX LOOP command does not raise AUX IRQ + */ + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "RIOWORKS"), + DMI_MATCH(DMI_BOARD_NAME, "HDAMB"), + DMI_MATCH(DMI_BOARD_VERSION, "Rev E"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + { + /* Sharp Actius MM20 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SHARP"), + DMI_MATCH(DMI_PRODUCT_NAME, "PC-MM20 Series"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * Sony Vaio FZ-240E - + * reset and GET ID commands issued via KBD port are + * sometimes being delivered to AUX3. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FZ240E"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * Most (all?) VAIOs do not have external PS/2 ports nor + * they implement active multiplexing properly, and + * MUX discovery usually messes up keyboard/touchpad. + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_BOARD_NAME, "VAIO"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* Sony Vaio FS-115b */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FS115B"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + /* + * Sony Vaio VGN-CS series require MUX or the touch sensor + * buttons will disturb touchpad operation + */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), + DMI_MATCH(DMI_PRODUCT_NAME, "VGN-CS"), + }, + .driver_data = (void *)(SERIO_QUIRK_FORCEMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P10"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "EQUIUM A110"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE C850D"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + /* + * A lot of modern Clevo barebones have touchpad and/or keyboard issues + * after suspend fixable with nomux + reset + noloop + nopnp. Luckily, + * none of them have an external PS/2 port so this can safely be set for + * all of them. These two are based on a Clevo design, but have the + * board_name changed. + */ + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "AURA1501"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* Mivvy M310 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "VIOOO"), + DMI_MATCH(DMI_PRODUCT_NAME, "N10"), + }, + .driver_data = (void *)(SERIO_QUIRK_RESET_ALWAYS) + }, + /* + * Some laptops need keyboard reset before probing for the trackpad to get + * it detected, initialised & finally work. + */ + { + /* Schenker XMG C504 - Elantech touchpad */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "XMG"), + DMI_MATCH(DMI_PRODUCT_NAME, "C504"), + }, + .driver_data = (void *)(SERIO_QUIRK_KBDRESET) + }, + { + /* Blue FB5601 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "blue"), + DMI_MATCH(DMI_PRODUCT_NAME, "FB5601"), + DMI_MATCH(DMI_PRODUCT_VERSION, "M606"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOLOOP) + }, + /* + * A lot of modern Clevo barebones have touchpad and/or keyboard issues + * after suspend fixable with nomux + reset + noloop + nopnp. Luckily, + * none of them have an external PS/2 port so this can safely be set for + * all of them. + * Clevo barebones come with board_vendor and/or system_vendor set to + * either the very generic string "Notebook" and/or a different value + * for each individual reseller. The only somewhat universal way to + * identify them is by board_name. + */ + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "LAPQC71A"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "LAPQC71B"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "N140CU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "N141CU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * Setting SERIO_QUIRK_NOMUX or SERIO_QUIRK_RESET_ALWAYS makes + * the keyboard very laggy for ~5 seconds after boot and + * sometimes also after resume. + * However both are required for the keyboard to not fail + * completely sometimes after boot or resume. + */ + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "N150CU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NH5xAx"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * Setting SERIO_QUIRK_NOMUX or SERIO_QUIRK_RESET_ALWAYS makes + * the keyboard very laggy for ~5 seconds after boot and + * sometimes also after resume. + * However both are required for the keyboard to not fail + * completely sometimes after boot or resume. + */ + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NHxxRZQ"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + /* + * At least one modern Clevo barebone has the touchpad connected both + * via PS/2 and i2c interface. This causes a race condition between the + * psmouse and i2c-hid driver. Since the full capability of the touchpad + * is available via the i2c interface and the device has no external + * PS/2 port, it is safe to just ignore all ps2 mouses here to avoid + * this issue. The known affected device is the + * TUXEDO InfinityBook S17 Gen6 / Clevo NS70MU which comes with one of + * the two different dmi strings below. NS50MU is not a typo! + */ + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NS50MU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOAUX | SERIO_QUIRK_NOMUX | + SERIO_QUIRK_RESET_ALWAYS | SERIO_QUIRK_NOLOOP | + SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NS50_70MU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOAUX | SERIO_QUIRK_NOMUX | + SERIO_QUIRK_RESET_ALWAYS | SERIO_QUIRK_NOLOOP | + SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "NJ50_70CU"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * This is only a partial board_name and might be followed by + * another letter or number. DMI_MATCH however does do partial + * matching. + */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P65xH"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* Clevo P650RS, 650RP6, Sager NP8152-S, and others */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P65xRP"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * This is only a partial board_name and might be followed by + * another letter or number. DMI_MATCH however does do partial + * matching. + */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P65_P67H"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * This is only a partial board_name and might be followed by + * another letter or number. DMI_MATCH however does do partial + * matching. + */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P65_67RP"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * This is only a partial board_name and might be followed by + * another letter or number. DMI_MATCH however does do partial + * matching. + */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P65_67RS"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + /* + * This is only a partial board_name and might be followed by + * another letter or number. DMI_MATCH however does do partial + * matching. + */ + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "P67xRP"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PB50_70DFx,DDx"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PCX0DX"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + /* See comment on TUXEDO InfinityBook S17 Gen6 / Clevo NS70MU above */ + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PD5x_7xPNP_PNR_PNN_PNT"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOAUX) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "X170SM"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "X170KM-G"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX | SERIO_QUIRK_RESET_ALWAYS | + SERIO_QUIRK_NOLOOP | SERIO_QUIRK_NOPNP) + }, + { } +}; + +#ifdef CONFIG_PNP +static const struct dmi_system_id i8042_dmi_laptop_table[] __initconst = { + { + .matches = { + DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */ + }, + }, + { + .matches = { + DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */ + }, + }, + { + .matches = { + DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */ + }, + }, + { + .matches = { + DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */ + }, + }, + { } +}; +#endif + +#endif /* CONFIG_X86 */ + +#ifdef CONFIG_PNP +#include <linux/pnp.h> + +static bool i8042_pnp_kbd_registered; +static unsigned int i8042_pnp_kbd_devices; +static bool i8042_pnp_aux_registered; +static unsigned int i8042_pnp_aux_devices; + +static int i8042_pnp_command_reg; +static int i8042_pnp_data_reg; +static int i8042_pnp_kbd_irq; +static int i8042_pnp_aux_irq; + +static char i8042_pnp_kbd_name[32]; +static char i8042_pnp_aux_name[32]; + +static void i8042_pnp_id_to_string(struct pnp_id *id, char *dst, int dst_size) +{ + strscpy(dst, "PNP:", dst_size); + + while (id) { + strlcat(dst, " ", dst_size); + strlcat(dst, id->id, dst_size); + id = id->next; + } +} + +static int i8042_pnp_kbd_probe(struct pnp_dev *dev, const struct pnp_device_id *did) +{ + if (pnp_port_valid(dev, 0) && pnp_port_len(dev, 0) == 1) + i8042_pnp_data_reg = pnp_port_start(dev,0); + + if (pnp_port_valid(dev, 1) && pnp_port_len(dev, 1) == 1) + i8042_pnp_command_reg = pnp_port_start(dev, 1); + + if (pnp_irq_valid(dev,0)) + i8042_pnp_kbd_irq = pnp_irq(dev, 0); + + strscpy(i8042_pnp_kbd_name, did->id, sizeof(i8042_pnp_kbd_name)); + if (strlen(pnp_dev_name(dev))) { + strlcat(i8042_pnp_kbd_name, ":", sizeof(i8042_pnp_kbd_name)); + strlcat(i8042_pnp_kbd_name, pnp_dev_name(dev), sizeof(i8042_pnp_kbd_name)); + } + i8042_pnp_id_to_string(dev->id, i8042_kbd_firmware_id, + sizeof(i8042_kbd_firmware_id)); + i8042_kbd_fwnode = dev_fwnode(&dev->dev); + + /* Keyboard ports are always supposed to be wakeup-enabled */ + device_set_wakeup_enable(&dev->dev, true); + + i8042_pnp_kbd_devices++; + return 0; +} + +static int i8042_pnp_aux_probe(struct pnp_dev *dev, const struct pnp_device_id *did) +{ + if (pnp_port_valid(dev, 0) && pnp_port_len(dev, 0) == 1) + i8042_pnp_data_reg = pnp_port_start(dev,0); + + if (pnp_port_valid(dev, 1) && pnp_port_len(dev, 1) == 1) + i8042_pnp_command_reg = pnp_port_start(dev, 1); + + if (pnp_irq_valid(dev, 0)) + i8042_pnp_aux_irq = pnp_irq(dev, 0); + + strscpy(i8042_pnp_aux_name, did->id, sizeof(i8042_pnp_aux_name)); + if (strlen(pnp_dev_name(dev))) { + strlcat(i8042_pnp_aux_name, ":", sizeof(i8042_pnp_aux_name)); + strlcat(i8042_pnp_aux_name, pnp_dev_name(dev), sizeof(i8042_pnp_aux_name)); + } + i8042_pnp_id_to_string(dev->id, i8042_aux_firmware_id, + sizeof(i8042_aux_firmware_id)); + + i8042_pnp_aux_devices++; + return 0; +} + +static const struct pnp_device_id pnp_kbd_devids[] = { + { .id = "PNP0300", .driver_data = 0 }, + { .id = "PNP0301", .driver_data = 0 }, + { .id = "PNP0302", .driver_data = 0 }, + { .id = "PNP0303", .driver_data = 0 }, + { .id = "PNP0304", .driver_data = 0 }, + { .id = "PNP0305", .driver_data = 0 }, + { .id = "PNP0306", .driver_data = 0 }, + { .id = "PNP0309", .driver_data = 0 }, + { .id = "PNP030a", .driver_data = 0 }, + { .id = "PNP030b", .driver_data = 0 }, + { .id = "PNP0320", .driver_data = 0 }, + { .id = "PNP0343", .driver_data = 0 }, + { .id = "PNP0344", .driver_data = 0 }, + { .id = "PNP0345", .driver_data = 0 }, + { .id = "CPQA0D7", .driver_data = 0 }, + { .id = "", }, +}; +MODULE_DEVICE_TABLE(pnp, pnp_kbd_devids); + +static struct pnp_driver i8042_pnp_kbd_driver = { + .name = "i8042 kbd", + .id_table = pnp_kbd_devids, + .probe = i8042_pnp_kbd_probe, + .driver = { + .probe_type = PROBE_FORCE_SYNCHRONOUS, + .suppress_bind_attrs = true, + }, +}; + +static const struct pnp_device_id pnp_aux_devids[] = { + { .id = "AUI0200", .driver_data = 0 }, + { .id = "FJC6000", .driver_data = 0 }, + { .id = "FJC6001", .driver_data = 0 }, + { .id = "PNP0f03", .driver_data = 0 }, + { .id = "PNP0f0b", .driver_data = 0 }, + { .id = "PNP0f0e", .driver_data = 0 }, + { .id = "PNP0f12", .driver_data = 0 }, + { .id = "PNP0f13", .driver_data = 0 }, + { .id = "PNP0f19", .driver_data = 0 }, + { .id = "PNP0f1c", .driver_data = 0 }, + { .id = "SYN0801", .driver_data = 0 }, + { .id = "", }, +}; +MODULE_DEVICE_TABLE(pnp, pnp_aux_devids); + +static struct pnp_driver i8042_pnp_aux_driver = { + .name = "i8042 aux", + .id_table = pnp_aux_devids, + .probe = i8042_pnp_aux_probe, + .driver = { + .probe_type = PROBE_FORCE_SYNCHRONOUS, + .suppress_bind_attrs = true, + }, +}; + +static void i8042_pnp_exit(void) +{ + if (i8042_pnp_kbd_registered) { + i8042_pnp_kbd_registered = false; + pnp_unregister_driver(&i8042_pnp_kbd_driver); + } + + if (i8042_pnp_aux_registered) { + i8042_pnp_aux_registered = false; + pnp_unregister_driver(&i8042_pnp_aux_driver); + } +} + +static int __init i8042_pnp_init(void) +{ + char kbd_irq_str[4] = { 0 }, aux_irq_str[4] = { 0 }; + bool pnp_data_busted = false; + int err; + + if (i8042_nopnp) { + pr_info("PNP detection disabled\n"); + return 0; + } + + err = pnp_register_driver(&i8042_pnp_kbd_driver); + if (!err) + i8042_pnp_kbd_registered = true; + + err = pnp_register_driver(&i8042_pnp_aux_driver); + if (!err) + i8042_pnp_aux_registered = true; + + if (!i8042_pnp_kbd_devices && !i8042_pnp_aux_devices) { + i8042_pnp_exit(); +#if defined(__ia64__) + return -ENODEV; +#else + pr_info("PNP: No PS/2 controller found.\n"); +#if defined(__loongarch__) + if (acpi_disabled == 0) + return -ENODEV; +#else + if (x86_platform.legacy.i8042 != + X86_LEGACY_I8042_EXPECTED_PRESENT) + return -ENODEV; +#endif + pr_info("Probing ports directly.\n"); + return 0; +#endif + } + + if (i8042_pnp_kbd_devices) + snprintf(kbd_irq_str, sizeof(kbd_irq_str), + "%d", i8042_pnp_kbd_irq); + if (i8042_pnp_aux_devices) + snprintf(aux_irq_str, sizeof(aux_irq_str), + "%d", i8042_pnp_aux_irq); + + pr_info("PNP: PS/2 Controller [%s%s%s] at %#x,%#x irq %s%s%s\n", + i8042_pnp_kbd_name, (i8042_pnp_kbd_devices && i8042_pnp_aux_devices) ? "," : "", + i8042_pnp_aux_name, + i8042_pnp_data_reg, i8042_pnp_command_reg, + kbd_irq_str, (i8042_pnp_kbd_devices && i8042_pnp_aux_devices) ? "," : "", + aux_irq_str); + +#if defined(__ia64__) + if (!i8042_pnp_kbd_devices) + i8042_nokbd = true; + if (!i8042_pnp_aux_devices) + i8042_noaux = true; +#endif + + if (((i8042_pnp_data_reg & ~0xf) == (i8042_data_reg & ~0xf) && + i8042_pnp_data_reg != i8042_data_reg) || + !i8042_pnp_data_reg) { + pr_warn("PNP: PS/2 controller has invalid data port %#x; using default %#x\n", + i8042_pnp_data_reg, i8042_data_reg); + i8042_pnp_data_reg = i8042_data_reg; + pnp_data_busted = true; + } + + if (((i8042_pnp_command_reg & ~0xf) == (i8042_command_reg & ~0xf) && + i8042_pnp_command_reg != i8042_command_reg) || + !i8042_pnp_command_reg) { + pr_warn("PNP: PS/2 controller has invalid command port %#x; using default %#x\n", + i8042_pnp_command_reg, i8042_command_reg); + i8042_pnp_command_reg = i8042_command_reg; + pnp_data_busted = true; + } + + if (!i8042_nokbd && !i8042_pnp_kbd_irq) { + pr_warn("PNP: PS/2 controller doesn't have KBD irq; using default %d\n", + i8042_kbd_irq); + i8042_pnp_kbd_irq = i8042_kbd_irq; + pnp_data_busted = true; + } + + if (!i8042_noaux && !i8042_pnp_aux_irq) { + if (!pnp_data_busted && i8042_pnp_kbd_irq) { + pr_warn("PNP: PS/2 appears to have AUX port disabled, " + "if this is incorrect please boot with i8042.nopnp\n"); + i8042_noaux = true; + } else { + pr_warn("PNP: PS/2 controller doesn't have AUX irq; using default %d\n", + i8042_aux_irq); + i8042_pnp_aux_irq = i8042_aux_irq; + } + } + + i8042_data_reg = i8042_pnp_data_reg; + i8042_command_reg = i8042_pnp_command_reg; + i8042_kbd_irq = i8042_pnp_kbd_irq; + i8042_aux_irq = i8042_pnp_aux_irq; + +#ifdef CONFIG_X86 + i8042_bypass_aux_irq_test = !pnp_data_busted && + dmi_check_system(i8042_dmi_laptop_table); +#endif + + return 0; +} + +#else /* !CONFIG_PNP */ +static inline int i8042_pnp_init(void) { return 0; } +static inline void i8042_pnp_exit(void) { } +#endif /* CONFIG_PNP */ + + +#ifdef CONFIG_X86 +static void __init i8042_check_quirks(void) +{ + const struct dmi_system_id *device_quirk_info; + uintptr_t quirks; + + device_quirk_info = dmi_first_match(i8042_dmi_quirk_table); + if (!device_quirk_info) + return; + + quirks = (uintptr_t)device_quirk_info->driver_data; + + if (quirks & SERIO_QUIRK_NOKBD) + i8042_nokbd = true; + if (quirks & SERIO_QUIRK_NOAUX) + i8042_noaux = true; + if (quirks & SERIO_QUIRK_NOMUX) + i8042_nomux = true; + if (quirks & SERIO_QUIRK_FORCEMUX) + i8042_nomux = false; + if (quirks & SERIO_QUIRK_UNLOCK) + i8042_unlock = true; + if (quirks & SERIO_QUIRK_PROBE_DEFER) + i8042_probe_defer = true; + /* Honor module parameter when value is not default */ + if (i8042_reset == I8042_RESET_DEFAULT) { + if (quirks & SERIO_QUIRK_RESET_ALWAYS) + i8042_reset = I8042_RESET_ALWAYS; + if (quirks & SERIO_QUIRK_RESET_NEVER) + i8042_reset = I8042_RESET_NEVER; + } + if (quirks & SERIO_QUIRK_DIECT) + i8042_direct = true; + if (quirks & SERIO_QUIRK_DUMBKBD) + i8042_dumbkbd = true; + if (quirks & SERIO_QUIRK_NOLOOP) + i8042_noloop = true; + if (quirks & SERIO_QUIRK_NOTIMEOUT) + i8042_notimeout = true; + if (quirks & SERIO_QUIRK_KBDRESET) + i8042_kbdreset = true; + if (quirks & SERIO_QUIRK_DRITEK) + i8042_dritek = true; +#ifdef CONFIG_PNP + if (quirks & SERIO_QUIRK_NOPNP) + i8042_nopnp = true; +#endif +} +#else +static inline void i8042_check_quirks(void) {} +#endif + +static int __init i8042_platform_init(void) +{ + int retval; + +#ifdef CONFIG_X86 + u8 a20_on = 0xdf; + /* Just return if platform does not have i8042 controller */ + if (x86_platform.legacy.i8042 == X86_LEGACY_I8042_PLATFORM_ABSENT) + return -ENODEV; +#endif + +/* + * On ix86 platforms touching the i8042 data register region can do really + * bad things. Because of this the region is always reserved on ix86 boxes. + * + * if (!request_region(I8042_DATA_REG, 16, "i8042")) + * return -EBUSY; + */ + + i8042_kbd_irq = I8042_MAP_IRQ(1); + i8042_aux_irq = I8042_MAP_IRQ(12); + +#if defined(__ia64__) + i8042_reset = I8042_RESET_ALWAYS; +#endif + + i8042_check_quirks(); + + pr_debug("Active quirks (empty means none):%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + i8042_nokbd ? " nokbd" : "", + i8042_noaux ? " noaux" : "", + i8042_nomux ? " nomux" : "", + i8042_unlock ? " unlock" : "", + i8042_probe_defer ? "probe_defer" : "", + i8042_reset == I8042_RESET_DEFAULT ? + "" : i8042_reset == I8042_RESET_ALWAYS ? + " reset_always" : " reset_never", + i8042_direct ? " direct" : "", + i8042_dumbkbd ? " dumbkbd" : "", + i8042_noloop ? " noloop" : "", + i8042_notimeout ? " notimeout" : "", + i8042_kbdreset ? " kbdreset" : "", +#ifdef CONFIG_X86 + i8042_dritek ? " dritek" : "", +#else + "", +#endif +#ifdef CONFIG_PNP + i8042_nopnp ? " nopnp" : ""); +#else + ""); +#endif + + retval = i8042_pnp_init(); + if (retval) + return retval; + +#ifdef CONFIG_X86 + /* + * A20 was already enabled during early kernel init. But some buggy + * BIOSes (in MSI Laptops) require A20 to be enabled using 8042 to + * resume from S3. So we do it here and hope that nothing breaks. + */ + i8042_command(&a20_on, 0x10d1); + i8042_command(NULL, 0x00ff); /* Null command for SMM firmware */ +#endif /* CONFIG_X86 */ + + return retval; +} + +static inline void i8042_platform_exit(void) +{ + i8042_pnp_exit(); +} + +#endif /* _I8042_ACPIPNPIO_H */ diff --git a/drivers/input/serio/i8042-io.h b/drivers/input/serio/i8042-io.h new file mode 100644 index 000000000..64590b86e --- /dev/null +++ b/drivers/input/serio/i8042-io.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_IO_H +#define _I8042_IO_H + + +/* + * Names. + */ + +#define I8042_KBD_PHYS_DESC "isa0060/serio0" +#define I8042_AUX_PHYS_DESC "isa0060/serio1" +#define I8042_MUX_PHYS_DESC "isa0060/serio%d" + +/* + * IRQs. + */ + +#ifdef __alpha__ +# define I8042_KBD_IRQ 1 +# define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ +#elif defined(__arm__) +/* defined in include/asm-arm/arch-xxx/irqs.h */ +#include <asm/irq.h> +#elif defined(CONFIG_PPC) +extern int of_i8042_kbd_irq; +extern int of_i8042_aux_irq; +# define I8042_KBD_IRQ of_i8042_kbd_irq +# define I8042_AUX_IRQ of_i8042_aux_irq +#else +# define I8042_KBD_IRQ 1 +# define I8042_AUX_IRQ 12 +#endif + + +/* + * Register numbers. + */ + +#define I8042_COMMAND_REG 0x64 +#define I8042_STATUS_REG 0x64 +#define I8042_DATA_REG 0x60 + +static inline int i8042_read_data(void) +{ + return inb(I8042_DATA_REG); +} + +static inline int i8042_read_status(void) +{ + return inb(I8042_STATUS_REG); +} + +static inline void i8042_write_data(int val) +{ + outb(val, I8042_DATA_REG); +} + +static inline void i8042_write_command(int val) +{ + outb(val, I8042_COMMAND_REG); +} + +static inline int i8042_platform_init(void) +{ +/* + * On some platforms touching the i8042 data register region can do really + * bad things. Because of this the region is always reserved on such boxes. + */ +#if defined(CONFIG_PPC) + if (check_legacy_ioport(I8042_DATA_REG)) + return -ENODEV; +#endif +#if !defined(__sh__) && !defined(__alpha__) + if (!request_region(I8042_DATA_REG, 16, "i8042")) + return -EBUSY; +#endif + + i8042_reset = I8042_RESET_ALWAYS; + return 0; +} + +static inline void i8042_platform_exit(void) +{ +#if !defined(__sh__) && !defined(__alpha__) + release_region(I8042_DATA_REG, 16); +#endif +} + +#endif /* _I8042_IO_H */ diff --git a/drivers/input/serio/i8042-ip22io.h b/drivers/input/serio/i8042-ip22io.h new file mode 100644 index 000000000..6c7efa017 --- /dev/null +++ b/drivers/input/serio/i8042-ip22io.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_IP22_H +#define _I8042_IP22_H + +#include <asm/sgi/ioc.h> +#include <asm/sgi/ip22.h> + + +/* + * Names. + */ + +#define I8042_KBD_PHYS_DESC "hpc3ps2/serio0" +#define I8042_AUX_PHYS_DESC "hpc3ps2/serio1" +#define I8042_MUX_PHYS_DESC "hpc3ps2/serio%d" + +/* + * IRQs. + */ + +#define I8042_KBD_IRQ SGI_KEYBD_IRQ +#define I8042_AUX_IRQ SGI_KEYBD_IRQ + +/* + * Register numbers. + */ + +#define I8042_COMMAND_REG ((unsigned long)&sgioc->kbdmouse.command) +#define I8042_STATUS_REG ((unsigned long)&sgioc->kbdmouse.command) +#define I8042_DATA_REG ((unsigned long)&sgioc->kbdmouse.data) + +static inline int i8042_read_data(void) +{ + return sgioc->kbdmouse.data; +} + +static inline int i8042_read_status(void) +{ + return sgioc->kbdmouse.command; +} + +static inline void i8042_write_data(int val) +{ + sgioc->kbdmouse.data = val; +} + +static inline void i8042_write_command(int val) +{ + sgioc->kbdmouse.command = val; +} + +static inline int i8042_platform_init(void) +{ +#if 0 + /* XXX sgi_kh is a virtual address */ + if (!request_mem_region(sgi_kh, sizeof(struct hpc_keyb), "i8042")) + return -EBUSY; +#endif + + i8042_reset = I8042_RESET_ALWAYS; + + return 0; +} + +static inline void i8042_platform_exit(void) +{ +#if 0 + release_mem_region(JAZZ_KEYBOARD_ADDRESS, sizeof(struct hpc_keyb)); +#endif +} + +#endif /* _I8042_IP22_H */ diff --git a/drivers/input/serio/i8042-jazzio.h b/drivers/input/serio/i8042-jazzio.h new file mode 100644 index 000000000..4c2a96f91 --- /dev/null +++ b/drivers/input/serio/i8042-jazzio.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_JAZZ_H +#define _I8042_JAZZ_H + +#include <asm/jazz.h> + + +/* + * Names. + */ + +#define I8042_KBD_PHYS_DESC "R4030/serio0" +#define I8042_AUX_PHYS_DESC "R4030/serio1" +#define I8042_MUX_PHYS_DESC "R4030/serio%d" + +/* + * IRQs. + */ + +#define I8042_KBD_IRQ JAZZ_KEYBOARD_IRQ +#define I8042_AUX_IRQ JAZZ_MOUSE_IRQ + +#define I8042_COMMAND_REG ((unsigned long)&jazz_kh->command) +#define I8042_STATUS_REG ((unsigned long)&jazz_kh->command) +#define I8042_DATA_REG ((unsigned long)&jazz_kh->data) + +static inline int i8042_read_data(void) +{ + return jazz_kh->data; +} + +static inline int i8042_read_status(void) +{ + return jazz_kh->command; +} + +static inline void i8042_write_data(int val) +{ + jazz_kh->data = val; +} + +static inline void i8042_write_command(int val) +{ + jazz_kh->command = val; +} + +static inline int i8042_platform_init(void) +{ +#if 0 + /* XXX JAZZ_KEYBOARD_ADDRESS is a virtual address */ + if (!request_mem_region(JAZZ_KEYBOARD_ADDRESS, 2, "i8042")) + return -EBUSY; +#endif + + return 0; +} + +static inline void i8042_platform_exit(void) +{ +#if 0 + release_mem_region(JAZZ_KEYBOARD_ADDRESS, 2); +#endif +} + +#endif /* _I8042_JAZZ_H */ diff --git a/drivers/input/serio/i8042-snirm.h b/drivers/input/serio/i8042-snirm.h new file mode 100644 index 000000000..4b7136704 --- /dev/null +++ b/drivers/input/serio/i8042-snirm.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_SNIRM_H +#define _I8042_SNIRM_H + +#include <asm/sni.h> + + +/* + * Names. + */ + +#define I8042_KBD_PHYS_DESC "onboard/serio0" +#define I8042_AUX_PHYS_DESC "onboard/serio1" +#define I8042_MUX_PHYS_DESC "onboard/serio%d" + +/* + * IRQs. + */ +static int i8042_kbd_irq; +static int i8042_aux_irq; +#define I8042_KBD_IRQ i8042_kbd_irq +#define I8042_AUX_IRQ i8042_aux_irq + +static void __iomem *kbd_iobase; + +#define I8042_COMMAND_REG (kbd_iobase + 0x64UL) +#define I8042_DATA_REG (kbd_iobase + 0x60UL) + +static inline int i8042_read_data(void) +{ + return readb(kbd_iobase + 0x60UL); +} + +static inline int i8042_read_status(void) +{ + return readb(kbd_iobase + 0x64UL); +} + +static inline void i8042_write_data(int val) +{ + writeb(val, kbd_iobase + 0x60UL); +} + +static inline void i8042_write_command(int val) +{ + writeb(val, kbd_iobase + 0x64UL); +} +static inline int i8042_platform_init(void) +{ + /* RM200 is strange ... */ + if (sni_brd_type == SNI_BRD_RM200) { + kbd_iobase = ioremap(0x16000000, 4); + i8042_kbd_irq = 33; + i8042_aux_irq = 44; + } else { + kbd_iobase = ioremap(0x14000000, 4); + i8042_kbd_irq = 1; + i8042_aux_irq = 12; + } + if (!kbd_iobase) + return -ENOMEM; + + return 0; +} + +static inline void i8042_platform_exit(void) +{ + +} + +#endif /* _I8042_SNIRM_H */ diff --git a/drivers/input/serio/i8042-sparcio.h b/drivers/input/serio/i8042-sparcio.h new file mode 100644 index 000000000..c712c1fe0 --- /dev/null +++ b/drivers/input/serio/i8042-sparcio.h @@ -0,0 +1,168 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _I8042_SPARCIO_H +#define _I8042_SPARCIO_H + +#include <linux/of_device.h> +#include <linux/types.h> + +#include <asm/io.h> +#include <asm/oplib.h> +#include <asm/prom.h> + +static int i8042_kbd_irq = -1; +static int i8042_aux_irq = -1; +#define I8042_KBD_IRQ i8042_kbd_irq +#define I8042_AUX_IRQ i8042_aux_irq + +#define I8042_KBD_PHYS_DESC "sparcps2/serio0" +#define I8042_AUX_PHYS_DESC "sparcps2/serio1" +#define I8042_MUX_PHYS_DESC "sparcps2/serio%d" + +static void __iomem *kbd_iobase; + +#define I8042_COMMAND_REG (kbd_iobase + 0x64UL) +#define I8042_DATA_REG (kbd_iobase + 0x60UL) + +static inline int i8042_read_data(void) +{ + return readb(kbd_iobase + 0x60UL); +} + +static inline int i8042_read_status(void) +{ + return readb(kbd_iobase + 0x64UL); +} + +static inline void i8042_write_data(int val) +{ + writeb(val, kbd_iobase + 0x60UL); +} + +static inline void i8042_write_command(int val) +{ + writeb(val, kbd_iobase + 0x64UL); +} + +#ifdef CONFIG_PCI + +static struct resource *kbd_res; + +#define OBP_PS2KBD_NAME1 "kb_ps2" +#define OBP_PS2KBD_NAME2 "keyboard" +#define OBP_PS2MS_NAME1 "kdmouse" +#define OBP_PS2MS_NAME2 "mouse" + +static int sparc_i8042_probe(struct platform_device *op) +{ + struct device_node *dp; + + for_each_child_of_node(op->dev.of_node, dp) { + if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) || + of_node_name_eq(dp, OBP_PS2KBD_NAME2)) { + struct platform_device *kbd = of_find_device_by_node(dp); + unsigned int irq = kbd->archdata.irqs[0]; + if (irq == 0xffffffff) + irq = op->archdata.irqs[0]; + i8042_kbd_irq = irq; + kbd_iobase = of_ioremap(&kbd->resource[0], + 0, 8, "kbd"); + kbd_res = &kbd->resource[0]; + } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) || + of_node_name_eq(dp, OBP_PS2MS_NAME2)) { + struct platform_device *ms = of_find_device_by_node(dp); + unsigned int irq = ms->archdata.irqs[0]; + if (irq == 0xffffffff) + irq = op->archdata.irqs[0]; + i8042_aux_irq = irq; + } + } + + return 0; +} + +static int sparc_i8042_remove(struct platform_device *op) +{ + of_iounmap(kbd_res, kbd_iobase, 8); + + return 0; +} + +static const struct of_device_id sparc_i8042_match[] = { + { + .name = "8042", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, sparc_i8042_match); + +static struct platform_driver sparc_i8042_driver = { + .driver = { + .name = "i8042", + .of_match_table = sparc_i8042_match, + }, + .probe = sparc_i8042_probe, + .remove = sparc_i8042_remove, +}; + +static bool i8042_is_mr_coffee(void) +{ + struct device_node *root; + const char *name; + bool is_mr_coffee; + + root = of_find_node_by_path("/"); + + name = of_get_property(root, "name", NULL); + is_mr_coffee = name && !strcmp(name, "SUNW,JavaStation-1"); + + of_node_put(root); + + return is_mr_coffee; +} + +static int __init i8042_platform_init(void) +{ + if (i8042_is_mr_coffee()) { + /* Hardcoded values for MrCoffee. */ + i8042_kbd_irq = i8042_aux_irq = 13 | 0x20; + kbd_iobase = ioremap(0x71300060, 8); + if (!kbd_iobase) + return -ENODEV; + } else { + int err = platform_driver_register(&sparc_i8042_driver); + if (err) + return err; + + if (i8042_kbd_irq == -1 || + i8042_aux_irq == -1) { + if (kbd_iobase) { + of_iounmap(kbd_res, kbd_iobase, 8); + kbd_iobase = (void __iomem *) NULL; + } + return -ENODEV; + } + } + + i8042_reset = I8042_RESET_ALWAYS; + + return 0; +} + +static inline void i8042_platform_exit(void) +{ + if (!i8042_is_mr_coffee()) + platform_driver_unregister(&sparc_i8042_driver); +} + +#else /* !CONFIG_PCI */ +static int __init i8042_platform_init(void) +{ + return -ENODEV; +} + +static inline void i8042_platform_exit(void) +{ +} +#endif /* !CONFIG_PCI */ + +#endif /* _I8042_SPARCIO_H */ diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c new file mode 100644 index 000000000..6dac7c185 --- /dev/null +++ b/drivers/input/serio/i8042.c @@ -0,0 +1,1671 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * i8042 keyboard and mouse controller driver for Linux + * + * Copyright (c) 1999-2004 Vojtech Pavlik + */ + + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/serio.h> +#include <linux/err.h> +#include <linux/rcupdate.h> +#include <linux/platform_device.h> +#include <linux/i8042.h> +#include <linux/slab.h> +#include <linux/suspend.h> +#include <linux/property.h> + +#include <asm/io.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); +MODULE_DESCRIPTION("i8042 keyboard and mouse controller driver"); +MODULE_LICENSE("GPL"); + +static bool i8042_nokbd; +module_param_named(nokbd, i8042_nokbd, bool, 0); +MODULE_PARM_DESC(nokbd, "Do not probe or use KBD port."); + +static bool i8042_noaux; +module_param_named(noaux, i8042_noaux, bool, 0); +MODULE_PARM_DESC(noaux, "Do not probe or use AUX (mouse) port."); + +static bool i8042_nomux; +module_param_named(nomux, i8042_nomux, bool, 0); +MODULE_PARM_DESC(nomux, "Do not check whether an active multiplexing controller is present."); + +static bool i8042_unlock; +module_param_named(unlock, i8042_unlock, bool, 0); +MODULE_PARM_DESC(unlock, "Ignore keyboard lock."); + +static bool i8042_probe_defer; +module_param_named(probe_defer, i8042_probe_defer, bool, 0); +MODULE_PARM_DESC(probe_defer, "Allow deferred probing."); + +enum i8042_controller_reset_mode { + I8042_RESET_NEVER, + I8042_RESET_ALWAYS, + I8042_RESET_ON_S2RAM, +#define I8042_RESET_DEFAULT I8042_RESET_ON_S2RAM +}; +static enum i8042_controller_reset_mode i8042_reset = I8042_RESET_DEFAULT; +static int i8042_set_reset(const char *val, const struct kernel_param *kp) +{ + enum i8042_controller_reset_mode *arg = kp->arg; + int error; + bool reset; + + if (val) { + error = kstrtobool(val, &reset); + if (error) + return error; + } else { + reset = true; + } + + *arg = reset ? I8042_RESET_ALWAYS : I8042_RESET_NEVER; + return 0; +} + +static const struct kernel_param_ops param_ops_reset_param = { + .flags = KERNEL_PARAM_OPS_FL_NOARG, + .set = i8042_set_reset, +}; +#define param_check_reset_param(name, p) \ + __param_check(name, p, enum i8042_controller_reset_mode) +module_param_named(reset, i8042_reset, reset_param, 0); +MODULE_PARM_DESC(reset, "Reset controller on resume, cleanup or both"); + +static bool i8042_direct; +module_param_named(direct, i8042_direct, bool, 0); +MODULE_PARM_DESC(direct, "Put keyboard port into non-translated mode."); + +static bool i8042_dumbkbd; +module_param_named(dumbkbd, i8042_dumbkbd, bool, 0); +MODULE_PARM_DESC(dumbkbd, "Pretend that controller can only read data from keyboard"); + +static bool i8042_noloop; +module_param_named(noloop, i8042_noloop, bool, 0); +MODULE_PARM_DESC(noloop, "Disable the AUX Loopback command while probing for the AUX port"); + +static bool i8042_notimeout; +module_param_named(notimeout, i8042_notimeout, bool, 0); +MODULE_PARM_DESC(notimeout, "Ignore timeouts signalled by i8042"); + +static bool i8042_kbdreset; +module_param_named(kbdreset, i8042_kbdreset, bool, 0); +MODULE_PARM_DESC(kbdreset, "Reset device connected to KBD port"); + +#ifdef CONFIG_X86 +static bool i8042_dritek; +module_param_named(dritek, i8042_dritek, bool, 0); +MODULE_PARM_DESC(dritek, "Force enable the Dritek keyboard extension"); +#endif + +#ifdef CONFIG_PNP +static bool i8042_nopnp; +module_param_named(nopnp, i8042_nopnp, bool, 0); +MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings"); +#endif + +#define DEBUG +#ifdef DEBUG +static bool i8042_debug; +module_param_named(debug, i8042_debug, bool, 0600); +MODULE_PARM_DESC(debug, "Turn i8042 debugging mode on and off"); + +static bool i8042_unmask_kbd_data; +module_param_named(unmask_kbd_data, i8042_unmask_kbd_data, bool, 0600); +MODULE_PARM_DESC(unmask_kbd_data, "Unconditional enable (may reveal sensitive data) of normally sanitize-filtered kbd data traffic debug log [pre-condition: i8042.debug=1 enabled]"); +#endif + +static bool i8042_present; +static bool i8042_bypass_aux_irq_test; +static char i8042_kbd_firmware_id[128]; +static char i8042_aux_firmware_id[128]; +static struct fwnode_handle *i8042_kbd_fwnode; + +#include "i8042.h" + +/* + * i8042_lock protects serialization between i8042_command and + * the interrupt handler. + */ +static DEFINE_SPINLOCK(i8042_lock); + +/* + * Writers to AUX and KBD ports as well as users issuing i8042_command + * directly should acquire i8042_mutex (by means of calling + * i8042_lock_chip() and i8042_unlock_chip() helpers) to ensure that + * they do not disturb each other (unfortunately in many i8042 + * implementations write to one of the ports will immediately abort + * command that is being processed by another port). + */ +static DEFINE_MUTEX(i8042_mutex); + +struct i8042_port { + struct serio *serio; + int irq; + bool exists; + bool driver_bound; + signed char mux; +}; + +#define I8042_KBD_PORT_NO 0 +#define I8042_AUX_PORT_NO 1 +#define I8042_MUX_PORT_NO 2 +#define I8042_NUM_PORTS (I8042_NUM_MUX_PORTS + 2) + +static struct i8042_port i8042_ports[I8042_NUM_PORTS]; + +static unsigned char i8042_initial_ctr; +static unsigned char i8042_ctr; +static bool i8042_mux_present; +static bool i8042_kbd_irq_registered; +static bool i8042_aux_irq_registered; +static unsigned char i8042_suppress_kbd_ack; +static struct platform_device *i8042_platform_device; +static struct notifier_block i8042_kbd_bind_notifier_block; + +static irqreturn_t i8042_interrupt(int irq, void *dev_id); +static bool (*i8042_platform_filter)(unsigned char data, unsigned char str, + struct serio *serio); + +void i8042_lock_chip(void) +{ + mutex_lock(&i8042_mutex); +} +EXPORT_SYMBOL(i8042_lock_chip); + +void i8042_unlock_chip(void) +{ + mutex_unlock(&i8042_mutex); +} +EXPORT_SYMBOL(i8042_unlock_chip); + +int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str, + struct serio *serio)) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&i8042_lock, flags); + + if (i8042_platform_filter) { + ret = -EBUSY; + goto out; + } + + i8042_platform_filter = filter; + +out: + spin_unlock_irqrestore(&i8042_lock, flags); + return ret; +} +EXPORT_SYMBOL(i8042_install_filter); + +int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str, + struct serio *port)) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&i8042_lock, flags); + + if (i8042_platform_filter != filter) { + ret = -EINVAL; + goto out; + } + + i8042_platform_filter = NULL; + +out: + spin_unlock_irqrestore(&i8042_lock, flags); + return ret; +} +EXPORT_SYMBOL(i8042_remove_filter); + +/* + * The i8042_wait_read() and i8042_wait_write functions wait for the i8042 to + * be ready for reading values from it / writing values to it. + * Called always with i8042_lock held. + */ + +static int i8042_wait_read(void) +{ + int i = 0; + + while ((~i8042_read_status() & I8042_STR_OBF) && (i < I8042_CTL_TIMEOUT)) { + udelay(50); + i++; + } + return -(i == I8042_CTL_TIMEOUT); +} + +static int i8042_wait_write(void) +{ + int i = 0; + + while ((i8042_read_status() & I8042_STR_IBF) && (i < I8042_CTL_TIMEOUT)) { + udelay(50); + i++; + } + return -(i == I8042_CTL_TIMEOUT); +} + +/* + * i8042_flush() flushes all data that may be in the keyboard and mouse buffers + * of the i8042 down the toilet. + */ + +static int i8042_flush(void) +{ + unsigned long flags; + unsigned char data, str; + int count = 0; + int retval = 0; + + spin_lock_irqsave(&i8042_lock, flags); + + while ((str = i8042_read_status()) & I8042_STR_OBF) { + if (count++ < I8042_BUFFER_SIZE) { + udelay(50); + data = i8042_read_data(); + dbg("%02x <- i8042 (flush, %s)\n", + data, str & I8042_STR_AUXDATA ? "aux" : "kbd"); + } else { + retval = -EIO; + break; + } + } + + spin_unlock_irqrestore(&i8042_lock, flags); + + return retval; +} + +/* + * i8042_command() executes a command on the i8042. It also sends the input + * parameter(s) of the commands to it, and receives the output value(s). The + * parameters are to be stored in the param array, and the output is placed + * into the same array. The number of the parameters and output values is + * encoded in bits 8-11 of the command number. + */ + +static int __i8042_command(unsigned char *param, int command) +{ + int i, error; + + if (i8042_noloop && command == I8042_CMD_AUX_LOOP) + return -1; + + error = i8042_wait_write(); + if (error) + return error; + + dbg("%02x -> i8042 (command)\n", command & 0xff); + i8042_write_command(command & 0xff); + + for (i = 0; i < ((command >> 12) & 0xf); i++) { + error = i8042_wait_write(); + if (error) { + dbg(" -- i8042 (wait write timeout)\n"); + return error; + } + dbg("%02x -> i8042 (parameter)\n", param[i]); + i8042_write_data(param[i]); + } + + for (i = 0; i < ((command >> 8) & 0xf); i++) { + error = i8042_wait_read(); + if (error) { + dbg(" -- i8042 (wait read timeout)\n"); + return error; + } + + if (command == I8042_CMD_AUX_LOOP && + !(i8042_read_status() & I8042_STR_AUXDATA)) { + dbg(" -- i8042 (auxerr)\n"); + return -1; + } + + param[i] = i8042_read_data(); + dbg("%02x <- i8042 (return)\n", param[i]); + } + + return 0; +} + +int i8042_command(unsigned char *param, int command) +{ + unsigned long flags; + int retval; + + if (!i8042_present) + return -1; + + spin_lock_irqsave(&i8042_lock, flags); + retval = __i8042_command(param, command); + spin_unlock_irqrestore(&i8042_lock, flags); + + return retval; +} +EXPORT_SYMBOL(i8042_command); + +/* + * i8042_kbd_write() sends a byte out through the keyboard interface. + */ + +static int i8042_kbd_write(struct serio *port, unsigned char c) +{ + unsigned long flags; + int retval = 0; + + spin_lock_irqsave(&i8042_lock, flags); + + if (!(retval = i8042_wait_write())) { + dbg("%02x -> i8042 (kbd-data)\n", c); + i8042_write_data(c); + } + + spin_unlock_irqrestore(&i8042_lock, flags); + + return retval; +} + +/* + * i8042_aux_write() sends a byte out through the aux interface. + */ + +static int i8042_aux_write(struct serio *serio, unsigned char c) +{ + struct i8042_port *port = serio->port_data; + + return i8042_command(&c, port->mux == -1 ? + I8042_CMD_AUX_SEND : + I8042_CMD_MUX_SEND + port->mux); +} + + +/* + * i8042_port_close attempts to clear AUX or KBD port state by disabling + * and then re-enabling it. + */ + +static void i8042_port_close(struct serio *serio) +{ + int irq_bit; + int disable_bit; + const char *port_name; + + if (serio == i8042_ports[I8042_AUX_PORT_NO].serio) { + irq_bit = I8042_CTR_AUXINT; + disable_bit = I8042_CTR_AUXDIS; + port_name = "AUX"; + } else { + irq_bit = I8042_CTR_KBDINT; + disable_bit = I8042_CTR_KBDDIS; + port_name = "KBD"; + } + + i8042_ctr &= ~irq_bit; + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) + pr_warn("Can't write CTR while closing %s port\n", port_name); + + udelay(50); + + i8042_ctr &= ~disable_bit; + i8042_ctr |= irq_bit; + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) + pr_err("Can't reactivate %s port\n", port_name); + + /* + * See if there is any data appeared while we were messing with + * port state. + */ + i8042_interrupt(0, NULL); +} + +/* + * i8042_start() is called by serio core when port is about to finish + * registering. It will mark port as existing so i8042_interrupt can + * start sending data through it. + */ +static int i8042_start(struct serio *serio) +{ + struct i8042_port *port = serio->port_data; + + device_set_wakeup_capable(&serio->dev, true); + + /* + * On platforms using suspend-to-idle, allow the keyboard to + * wake up the system from sleep by enabling keyboard wakeups + * by default. This is consistent with keyboard wakeup + * behavior on many platforms using suspend-to-RAM (ACPI S3) + * by default. + */ + if (pm_suspend_default_s2idle() && + serio == i8042_ports[I8042_KBD_PORT_NO].serio) { + device_set_wakeup_enable(&serio->dev, true); + } + + spin_lock_irq(&i8042_lock); + port->exists = true; + spin_unlock_irq(&i8042_lock); + + return 0; +} + +/* + * i8042_stop() marks serio port as non-existing so i8042_interrupt + * will not try to send data to the port that is about to go away. + * The function is called by serio core as part of unregister procedure. + */ +static void i8042_stop(struct serio *serio) +{ + struct i8042_port *port = serio->port_data; + + spin_lock_irq(&i8042_lock); + port->exists = false; + port->serio = NULL; + spin_unlock_irq(&i8042_lock); + + /* + * We need to make sure that interrupt handler finishes using + * our serio port before we return from this function. + * We synchronize with both AUX and KBD IRQs because there is + * a (very unlikely) chance that AUX IRQ is raised for KBD port + * and vice versa. + */ + synchronize_irq(I8042_AUX_IRQ); + synchronize_irq(I8042_KBD_IRQ); +} + +/* + * i8042_filter() filters out unwanted bytes from the input data stream. + * It is called from i8042_interrupt and thus is running with interrupts + * off and i8042_lock held. + */ +static bool i8042_filter(unsigned char data, unsigned char str, + struct serio *serio) +{ + if (unlikely(i8042_suppress_kbd_ack)) { + if ((~str & I8042_STR_AUXDATA) && + (data == 0xfa || data == 0xfe)) { + i8042_suppress_kbd_ack--; + dbg("Extra keyboard ACK - filtered out\n"); + return true; + } + } + + if (i8042_platform_filter && i8042_platform_filter(data, str, serio)) { + dbg("Filtered out by platform filter\n"); + return true; + } + + return false; +} + +/* + * i8042_interrupt() is the most important function in this driver - + * it handles the interrupts from the i8042, and sends incoming bytes + * to the upper layers. + */ + +static irqreturn_t i8042_interrupt(int irq, void *dev_id) +{ + struct i8042_port *port; + struct serio *serio; + unsigned long flags; + unsigned char str, data; + unsigned int dfl; + unsigned int port_no; + bool filtered; + int ret = 1; + + spin_lock_irqsave(&i8042_lock, flags); + + str = i8042_read_status(); + if (unlikely(~str & I8042_STR_OBF)) { + spin_unlock_irqrestore(&i8042_lock, flags); + if (irq) + dbg("Interrupt %d, without any data\n", irq); + ret = 0; + goto out; + } + + data = i8042_read_data(); + + if (i8042_mux_present && (str & I8042_STR_AUXDATA)) { + static unsigned long last_transmit; + static unsigned char last_str; + + dfl = 0; + if (str & I8042_STR_MUXERR) { + dbg("MUX error, status is %02x, data is %02x\n", + str, data); +/* + * When MUXERR condition is signalled the data register can only contain + * 0xfd, 0xfe or 0xff if implementation follows the spec. Unfortunately + * it is not always the case. Some KBCs also report 0xfc when there is + * nothing connected to the port while others sometimes get confused which + * port the data came from and signal error leaving the data intact. They + * _do not_ revert to legacy mode (actually I've never seen KBC reverting + * to legacy mode yet, when we see one we'll add proper handling). + * Anyway, we process 0xfc, 0xfd, 0xfe and 0xff as timeouts, and for the + * rest assume that the data came from the same serio last byte + * was transmitted (if transmission happened not too long ago). + */ + + switch (data) { + default: + if (time_before(jiffies, last_transmit + HZ/10)) { + str = last_str; + break; + } + fallthrough; /* report timeout */ + case 0xfc: + case 0xfd: + case 0xfe: dfl = SERIO_TIMEOUT; data = 0xfe; break; + case 0xff: dfl = SERIO_PARITY; data = 0xfe; break; + } + } + + port_no = I8042_MUX_PORT_NO + ((str >> 6) & 3); + last_str = str; + last_transmit = jiffies; + } else { + + dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) | + ((str & I8042_STR_TIMEOUT && !i8042_notimeout) ? SERIO_TIMEOUT : 0); + + port_no = (str & I8042_STR_AUXDATA) ? + I8042_AUX_PORT_NO : I8042_KBD_PORT_NO; + } + + port = &i8042_ports[port_no]; + serio = port->exists ? port->serio : NULL; + + filter_dbg(port->driver_bound, data, "<- i8042 (interrupt, %d, %d%s%s)\n", + port_no, irq, + dfl & SERIO_PARITY ? ", bad parity" : "", + dfl & SERIO_TIMEOUT ? ", timeout" : ""); + + filtered = i8042_filter(data, str, serio); + + spin_unlock_irqrestore(&i8042_lock, flags); + + if (likely(serio && !filtered)) + serio_interrupt(serio, data, dfl); + + out: + return IRQ_RETVAL(ret); +} + +/* + * i8042_enable_kbd_port enables keyboard port on chip + */ + +static int i8042_enable_kbd_port(void) +{ + i8042_ctr &= ~I8042_CTR_KBDDIS; + i8042_ctr |= I8042_CTR_KBDINT; + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + i8042_ctr &= ~I8042_CTR_KBDINT; + i8042_ctr |= I8042_CTR_KBDDIS; + pr_err("Failed to enable KBD port\n"); + return -EIO; + } + + return 0; +} + +/* + * i8042_enable_aux_port enables AUX (mouse) port on chip + */ + +static int i8042_enable_aux_port(void) +{ + i8042_ctr &= ~I8042_CTR_AUXDIS; + i8042_ctr |= I8042_CTR_AUXINT; + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + i8042_ctr &= ~I8042_CTR_AUXINT; + i8042_ctr |= I8042_CTR_AUXDIS; + pr_err("Failed to enable AUX port\n"); + return -EIO; + } + + return 0; +} + +/* + * i8042_enable_mux_ports enables 4 individual AUX ports after + * the controller has been switched into Multiplexed mode + */ + +static int i8042_enable_mux_ports(void) +{ + unsigned char param; + int i; + + for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { + i8042_command(¶m, I8042_CMD_MUX_PFX + i); + i8042_command(¶m, I8042_CMD_AUX_ENABLE); + } + + return i8042_enable_aux_port(); +} + +/* + * i8042_set_mux_mode checks whether the controller has an + * active multiplexor and puts the chip into Multiplexed (true) + * or Legacy (false) mode. + */ + +static int i8042_set_mux_mode(bool multiplex, unsigned char *mux_version) +{ + + unsigned char param, val; +/* + * Get rid of bytes in the queue. + */ + + i8042_flush(); + +/* + * Internal loopback test - send three bytes, they should come back from the + * mouse interface, the last should be version. + */ + + param = val = 0xf0; + if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != val) + return -1; + param = val = multiplex ? 0x56 : 0xf6; + if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != val) + return -1; + param = val = multiplex ? 0xa4 : 0xa5; + if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param == val) + return -1; + +/* + * Workaround for interference with USB Legacy emulation + * that causes a v10.12 MUX to be found. + */ + if (param == 0xac) + return -1; + + if (mux_version) + *mux_version = param; + + return 0; +} + +/* + * i8042_check_mux() checks whether the controller supports the PS/2 Active + * Multiplexing specification by Synaptics, Phoenix, Insyde and + * LCS/Telegraphics. + */ + +static int i8042_check_mux(void) +{ + unsigned char mux_version; + + if (i8042_set_mux_mode(true, &mux_version)) + return -1; + + pr_info("Detected active multiplexing controller, rev %d.%d\n", + (mux_version >> 4) & 0xf, mux_version & 0xf); + +/* + * Disable all muxed ports by disabling AUX. + */ + i8042_ctr |= I8042_CTR_AUXDIS; + i8042_ctr &= ~I8042_CTR_AUXINT; + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + pr_err("Failed to disable AUX port, can't use MUX\n"); + return -EIO; + } + + i8042_mux_present = true; + + return 0; +} + +/* + * The following is used to test AUX IRQ delivery. + */ +static struct completion i8042_aux_irq_delivered; +static bool i8042_irq_being_tested; + +static irqreturn_t i8042_aux_test_irq(int irq, void *dev_id) +{ + unsigned long flags; + unsigned char str, data; + int ret = 0; + + spin_lock_irqsave(&i8042_lock, flags); + str = i8042_read_status(); + if (str & I8042_STR_OBF) { + data = i8042_read_data(); + dbg("%02x <- i8042 (aux_test_irq, %s)\n", + data, str & I8042_STR_AUXDATA ? "aux" : "kbd"); + if (i8042_irq_being_tested && + data == 0xa5 && (str & I8042_STR_AUXDATA)) + complete(&i8042_aux_irq_delivered); + ret = 1; + } + spin_unlock_irqrestore(&i8042_lock, flags); + + return IRQ_RETVAL(ret); +} + +/* + * i8042_toggle_aux - enables or disables AUX port on i8042 via command and + * verifies success by readinng CTR. Used when testing for presence of AUX + * port. + */ +static int i8042_toggle_aux(bool on) +{ + unsigned char param; + int i; + + if (i8042_command(¶m, + on ? I8042_CMD_AUX_ENABLE : I8042_CMD_AUX_DISABLE)) + return -1; + + /* some chips need some time to set the I8042_CTR_AUXDIS bit */ + for (i = 0; i < 100; i++) { + udelay(50); + + if (i8042_command(¶m, I8042_CMD_CTL_RCTR)) + return -1; + + if (!(param & I8042_CTR_AUXDIS) == on) + return 0; + } + + return -1; +} + +/* + * i8042_check_aux() applies as much paranoia as it can at detecting + * the presence of an AUX interface. + */ + +static int i8042_check_aux(void) +{ + int retval = -1; + bool irq_registered = false; + bool aux_loop_broken = false; + unsigned long flags; + unsigned char param; + +/* + * Get rid of bytes in the queue. + */ + + i8042_flush(); + +/* + * Internal loopback test - filters out AT-type i8042's. Unfortunately + * SiS screwed up and their 5597 doesn't support the LOOP command even + * though it has an AUX port. + */ + + param = 0x5a; + retval = i8042_command(¶m, I8042_CMD_AUX_LOOP); + if (retval || param != 0x5a) { + +/* + * External connection test - filters out AT-soldered PS/2 i8042's + * 0x00 - no error, 0x01-0x03 - clock/data stuck, 0xff - general error + * 0xfa - no error on some notebooks which ignore the spec + * Because it's common for chipsets to return error on perfectly functioning + * AUX ports, we test for this only when the LOOP command failed. + */ + + if (i8042_command(¶m, I8042_CMD_AUX_TEST) || + (param && param != 0xfa && param != 0xff)) + return -1; + +/* + * If AUX_LOOP completed without error but returned unexpected data + * mark it as broken + */ + if (!retval) + aux_loop_broken = true; + } + +/* + * Bit assignment test - filters out PS/2 i8042's in AT mode + */ + + if (i8042_toggle_aux(false)) { + pr_warn("Failed to disable AUX port, but continuing anyway... Is this a SiS?\n"); + pr_warn("If AUX port is really absent please use the 'i8042.noaux' option\n"); + } + + if (i8042_toggle_aux(true)) + return -1; + +/* + * Reset keyboard (needed on some laptops to successfully detect + * touchpad, e.g., some Gigabyte laptop models with Elantech + * touchpads). + */ + if (i8042_kbdreset) { + pr_warn("Attempting to reset device connected to KBD port\n"); + i8042_kbd_write(NULL, (unsigned char) 0xff); + } + +/* + * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and + * used it for a PCI card or somethig else. + */ + + if (i8042_noloop || i8042_bypass_aux_irq_test || aux_loop_broken) { +/* + * Without LOOP command we can't test AUX IRQ delivery. Assume the port + * is working and hope we are right. + */ + retval = 0; + goto out; + } + + if (request_irq(I8042_AUX_IRQ, i8042_aux_test_irq, IRQF_SHARED, + "i8042", i8042_platform_device)) + goto out; + + irq_registered = true; + + if (i8042_enable_aux_port()) + goto out; + + spin_lock_irqsave(&i8042_lock, flags); + + init_completion(&i8042_aux_irq_delivered); + i8042_irq_being_tested = true; + + param = 0xa5; + retval = __i8042_command(¶m, I8042_CMD_AUX_LOOP & 0xf0ff); + + spin_unlock_irqrestore(&i8042_lock, flags); + + if (retval) + goto out; + + if (wait_for_completion_timeout(&i8042_aux_irq_delivered, + msecs_to_jiffies(250)) == 0) { +/* + * AUX IRQ was never delivered so we need to flush the controller to + * get rid of the byte we put there; otherwise keyboard may not work. + */ + dbg(" -- i8042 (aux irq test timeout)\n"); + i8042_flush(); + retval = -1; + } + + out: + +/* + * Disable the interface. + */ + + i8042_ctr |= I8042_CTR_AUXDIS; + i8042_ctr &= ~I8042_CTR_AUXINT; + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) + retval = -1; + + if (irq_registered) + free_irq(I8042_AUX_IRQ, i8042_platform_device); + + return retval; +} + +static int i8042_controller_check(void) +{ + if (i8042_flush()) { + pr_info("No controller found\n"); + return -ENODEV; + } + + return 0; +} + +static int i8042_controller_selftest(void) +{ + unsigned char param; + int i = 0; + + /* + * We try this 5 times; on some really fragile systems this does not + * take the first time... + */ + do { + + if (i8042_command(¶m, I8042_CMD_CTL_TEST)) { + pr_err("i8042 controller selftest timeout\n"); + return -ENODEV; + } + + if (param == I8042_RET_CTL_TEST) + return 0; + + dbg("i8042 controller selftest: %#x != %#x\n", + param, I8042_RET_CTL_TEST); + msleep(50); + } while (i++ < 5); + +#ifdef CONFIG_X86 + /* + * On x86, we don't fail entire i8042 initialization if controller + * reset fails in hopes that keyboard port will still be functional + * and user will still get a working keyboard. This is especially + * important on netbooks. On other arches we trust hardware more. + */ + pr_info("giving up on controller selftest, continuing anyway...\n"); + return 0; +#else + pr_err("i8042 controller selftest failed\n"); + return -EIO; +#endif +} + +/* + * i8042_controller_init initializes the i8042 controller, and, + * most importantly, sets it into non-xlated mode if that's + * desired. + */ + +static int i8042_controller_init(void) +{ + unsigned long flags; + int n = 0; + unsigned char ctr[2]; + +/* + * Save the CTR for restore on unload / reboot. + */ + + do { + if (n >= 10) { + pr_err("Unable to get stable CTR read\n"); + return -EIO; + } + + if (n != 0) + udelay(50); + + if (i8042_command(&ctr[n++ % 2], I8042_CMD_CTL_RCTR)) { + pr_err("Can't read CTR while initializing i8042\n"); + return i8042_probe_defer ? -EPROBE_DEFER : -EIO; + } + + } while (n < 2 || ctr[0] != ctr[1]); + + i8042_initial_ctr = i8042_ctr = ctr[0]; + +/* + * Disable the keyboard interface and interrupt. + */ + + i8042_ctr |= I8042_CTR_KBDDIS; + i8042_ctr &= ~I8042_CTR_KBDINT; + +/* + * Handle keylock. + */ + + spin_lock_irqsave(&i8042_lock, flags); + if (~i8042_read_status() & I8042_STR_KEYLOCK) { + if (i8042_unlock) + i8042_ctr |= I8042_CTR_IGNKEYLOCK; + else + pr_warn("Warning: Keylock active\n"); + } + spin_unlock_irqrestore(&i8042_lock, flags); + +/* + * If the chip is configured into nontranslated mode by the BIOS, don't + * bother enabling translating and be happy. + */ + + if (~i8042_ctr & I8042_CTR_XLATE) + i8042_direct = true; + +/* + * Set nontranslated mode for the kbd interface if requested by an option. + * After this the kbd interface becomes a simple serial in/out, like the aux + * interface is. We don't do this by default, since it can confuse notebook + * BIOSes. + */ + + if (i8042_direct) + i8042_ctr &= ~I8042_CTR_XLATE; + +/* + * Write CTR back. + */ + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + pr_err("Can't write CTR while initializing i8042\n"); + return -EIO; + } + +/* + * Flush whatever accumulated while we were disabling keyboard port. + */ + + i8042_flush(); + + return 0; +} + + +/* + * Reset the controller and reset CRT to the original value set by BIOS. + */ + +static void i8042_controller_reset(bool s2r_wants_reset) +{ + i8042_flush(); + +/* + * Disable both KBD and AUX interfaces so they don't get in the way + */ + + i8042_ctr |= I8042_CTR_KBDDIS | I8042_CTR_AUXDIS; + i8042_ctr &= ~(I8042_CTR_KBDINT | I8042_CTR_AUXINT); + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) + pr_warn("Can't write CTR while resetting\n"); + +/* + * Disable MUX mode if present. + */ + + if (i8042_mux_present) + i8042_set_mux_mode(false, NULL); + +/* + * Reset the controller if requested. + */ + + if (i8042_reset == I8042_RESET_ALWAYS || + (i8042_reset == I8042_RESET_ON_S2RAM && s2r_wants_reset)) { + i8042_controller_selftest(); + } + +/* + * Restore the original control register setting. + */ + + if (i8042_command(&i8042_initial_ctr, I8042_CMD_CTL_WCTR)) + pr_warn("Can't restore CTR\n"); +} + + +/* + * i8042_panic_blink() will turn the keyboard LEDs on or off and is called + * when kernel panics. Flashing LEDs is useful for users running X who may + * not see the console and will help distinguishing panics from "real" + * lockups. + * + * Note that DELAY has a limit of 10ms so we will not get stuck here + * waiting for KBC to free up even if KBD interrupt is off + */ + +#define DELAY do { mdelay(1); if (++delay > 10) return delay; } while(0) + +static long i8042_panic_blink(int state) +{ + long delay = 0; + char led; + + led = (state) ? 0x01 | 0x04 : 0; + while (i8042_read_status() & I8042_STR_IBF) + DELAY; + dbg("%02x -> i8042 (panic blink)\n", 0xed); + i8042_suppress_kbd_ack = 2; + i8042_write_data(0xed); /* set leds */ + DELAY; + while (i8042_read_status() & I8042_STR_IBF) + DELAY; + DELAY; + dbg("%02x -> i8042 (panic blink)\n", led); + i8042_write_data(led); + DELAY; + return delay; +} + +#undef DELAY + +#ifdef CONFIG_X86 +static void i8042_dritek_enable(void) +{ + unsigned char param = 0x90; + int error; + + error = i8042_command(¶m, 0x1059); + if (error) + pr_warn("Failed to enable DRITEK extension: %d\n", error); +} +#endif + +#ifdef CONFIG_PM + +/* + * Here we try to reset everything back to a state we had + * before suspending. + */ + +static int i8042_controller_resume(bool s2r_wants_reset) +{ + int error; + + error = i8042_controller_check(); + if (error) + return error; + + if (i8042_reset == I8042_RESET_ALWAYS || + (i8042_reset == I8042_RESET_ON_S2RAM && s2r_wants_reset)) { + error = i8042_controller_selftest(); + if (error) + return error; + } + +/* + * Restore original CTR value and disable all ports + */ + + i8042_ctr = i8042_initial_ctr; + if (i8042_direct) + i8042_ctr &= ~I8042_CTR_XLATE; + i8042_ctr |= I8042_CTR_AUXDIS | I8042_CTR_KBDDIS; + i8042_ctr &= ~(I8042_CTR_AUXINT | I8042_CTR_KBDINT); + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + pr_warn("Can't write CTR to resume, retrying...\n"); + msleep(50); + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + pr_err("CTR write retry failed\n"); + return -EIO; + } + } + + +#ifdef CONFIG_X86 + if (i8042_dritek) + i8042_dritek_enable(); +#endif + + if (i8042_mux_present) { + if (i8042_set_mux_mode(true, NULL) || i8042_enable_mux_ports()) + pr_warn("failed to resume active multiplexor, mouse won't work\n"); + } else if (i8042_ports[I8042_AUX_PORT_NO].serio) + i8042_enable_aux_port(); + + if (i8042_ports[I8042_KBD_PORT_NO].serio) + i8042_enable_kbd_port(); + + i8042_interrupt(0, NULL); + + return 0; +} + +/* + * Here we try to restore the original BIOS settings to avoid + * upsetting it. + */ + +static int i8042_pm_suspend(struct device *dev) +{ + int i; + + if (pm_suspend_via_firmware()) + i8042_controller_reset(true); + + /* Set up serio interrupts for system wakeup. */ + for (i = 0; i < I8042_NUM_PORTS; i++) { + struct serio *serio = i8042_ports[i].serio; + + if (serio && device_may_wakeup(&serio->dev)) + enable_irq_wake(i8042_ports[i].irq); + } + + return 0; +} + +static int i8042_pm_resume_noirq(struct device *dev) +{ + if (!pm_resume_via_firmware()) + i8042_interrupt(0, NULL); + + return 0; +} + +static int i8042_pm_resume(struct device *dev) +{ + bool want_reset; + int i; + + for (i = 0; i < I8042_NUM_PORTS; i++) { + struct serio *serio = i8042_ports[i].serio; + + if (serio && device_may_wakeup(&serio->dev)) + disable_irq_wake(i8042_ports[i].irq); + } + + /* + * If platform firmware was not going to be involved in suspend, we did + * not restore the controller state to whatever it had been at boot + * time, so we do not need to do anything. + */ + if (!pm_suspend_via_firmware()) + return 0; + + /* + * We only need to reset the controller if we are resuming after handing + * off control to the platform firmware, otherwise we can simply restore + * the mode. + */ + want_reset = pm_resume_via_firmware(); + + return i8042_controller_resume(want_reset); +} + +static int i8042_pm_thaw(struct device *dev) +{ + i8042_interrupt(0, NULL); + + return 0; +} + +static int i8042_pm_reset(struct device *dev) +{ + i8042_controller_reset(false); + + return 0; +} + +static int i8042_pm_restore(struct device *dev) +{ + return i8042_controller_resume(false); +} + +static const struct dev_pm_ops i8042_pm_ops = { + .suspend = i8042_pm_suspend, + .resume_noirq = i8042_pm_resume_noirq, + .resume = i8042_pm_resume, + .thaw = i8042_pm_thaw, + .poweroff = i8042_pm_reset, + .restore = i8042_pm_restore, +}; + +#endif /* CONFIG_PM */ + +/* + * We need to reset the 8042 back to original mode on system shutdown, + * because otherwise BIOSes will be confused. + */ + +static void i8042_shutdown(struct platform_device *dev) +{ + i8042_controller_reset(false); +} + +static int i8042_create_kbd_port(void) +{ + struct serio *serio; + struct i8042_port *port = &i8042_ports[I8042_KBD_PORT_NO]; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + serio->id.type = i8042_direct ? SERIO_8042 : SERIO_8042_XL; + serio->write = i8042_dumbkbd ? NULL : i8042_kbd_write; + serio->start = i8042_start; + serio->stop = i8042_stop; + serio->close = i8042_port_close; + serio->ps2_cmd_mutex = &i8042_mutex; + serio->port_data = port; + serio->dev.parent = &i8042_platform_device->dev; + strscpy(serio->name, "i8042 KBD port", sizeof(serio->name)); + strscpy(serio->phys, I8042_KBD_PHYS_DESC, sizeof(serio->phys)); + strscpy(serio->firmware_id, i8042_kbd_firmware_id, + sizeof(serio->firmware_id)); + set_primary_fwnode(&serio->dev, i8042_kbd_fwnode); + + port->serio = serio; + port->irq = I8042_KBD_IRQ; + + return 0; +} + +static int i8042_create_aux_port(int idx) +{ + struct serio *serio; + int port_no = idx < 0 ? I8042_AUX_PORT_NO : I8042_MUX_PORT_NO + idx; + struct i8042_port *port = &i8042_ports[port_no]; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + serio->id.type = SERIO_8042; + serio->write = i8042_aux_write; + serio->start = i8042_start; + serio->stop = i8042_stop; + serio->ps2_cmd_mutex = &i8042_mutex; + serio->port_data = port; + serio->dev.parent = &i8042_platform_device->dev; + if (idx < 0) { + strscpy(serio->name, "i8042 AUX port", sizeof(serio->name)); + strscpy(serio->phys, I8042_AUX_PHYS_DESC, sizeof(serio->phys)); + strscpy(serio->firmware_id, i8042_aux_firmware_id, + sizeof(serio->firmware_id)); + serio->close = i8042_port_close; + } else { + snprintf(serio->name, sizeof(serio->name), "i8042 AUX%d port", idx); + snprintf(serio->phys, sizeof(serio->phys), I8042_MUX_PHYS_DESC, idx + 1); + strscpy(serio->firmware_id, i8042_aux_firmware_id, + sizeof(serio->firmware_id)); + } + + port->serio = serio; + port->mux = idx; + port->irq = I8042_AUX_IRQ; + + return 0; +} + +static void i8042_free_kbd_port(void) +{ + kfree(i8042_ports[I8042_KBD_PORT_NO].serio); + i8042_ports[I8042_KBD_PORT_NO].serio = NULL; +} + +static void i8042_free_aux_ports(void) +{ + int i; + + for (i = I8042_AUX_PORT_NO; i < I8042_NUM_PORTS; i++) { + kfree(i8042_ports[i].serio); + i8042_ports[i].serio = NULL; + } +} + +static void i8042_register_ports(void) +{ + int i; + + for (i = 0; i < I8042_NUM_PORTS; i++) { + struct serio *serio = i8042_ports[i].serio; + + if (!serio) + continue; + + printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n", + serio->name, + (unsigned long) I8042_DATA_REG, + (unsigned long) I8042_COMMAND_REG, + i8042_ports[i].irq); + serio_register_port(serio); + } +} + +static void i8042_unregister_ports(void) +{ + int i; + + for (i = 0; i < I8042_NUM_PORTS; i++) { + if (i8042_ports[i].serio) { + serio_unregister_port(i8042_ports[i].serio); + i8042_ports[i].serio = NULL; + } + } +} + +static void i8042_free_irqs(void) +{ + if (i8042_aux_irq_registered) + free_irq(I8042_AUX_IRQ, i8042_platform_device); + if (i8042_kbd_irq_registered) + free_irq(I8042_KBD_IRQ, i8042_platform_device); + + i8042_aux_irq_registered = i8042_kbd_irq_registered = false; +} + +static int i8042_setup_aux(void) +{ + int (*aux_enable)(void); + int error; + int i; + + if (i8042_check_aux()) + return -ENODEV; + + if (i8042_nomux || i8042_check_mux()) { + error = i8042_create_aux_port(-1); + if (error) + goto err_free_ports; + aux_enable = i8042_enable_aux_port; + } else { + for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { + error = i8042_create_aux_port(i); + if (error) + goto err_free_ports; + } + aux_enable = i8042_enable_mux_ports; + } + + error = request_irq(I8042_AUX_IRQ, i8042_interrupt, IRQF_SHARED, + "i8042", i8042_platform_device); + if (error) + goto err_free_ports; + + error = aux_enable(); + if (error) + goto err_free_irq; + + i8042_aux_irq_registered = true; + return 0; + + err_free_irq: + free_irq(I8042_AUX_IRQ, i8042_platform_device); + err_free_ports: + i8042_free_aux_ports(); + return error; +} + +static int i8042_setup_kbd(void) +{ + int error; + + error = i8042_create_kbd_port(); + if (error) + return error; + + error = request_irq(I8042_KBD_IRQ, i8042_interrupt, IRQF_SHARED, + "i8042", i8042_platform_device); + if (error) + goto err_free_port; + + error = i8042_enable_kbd_port(); + if (error) + goto err_free_irq; + + i8042_kbd_irq_registered = true; + return 0; + + err_free_irq: + free_irq(I8042_KBD_IRQ, i8042_platform_device); + err_free_port: + i8042_free_kbd_port(); + return error; +} + +static int i8042_kbd_bind_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct serio *serio = to_serio_port(dev); + struct i8042_port *port = serio->port_data; + + if (serio != i8042_ports[I8042_KBD_PORT_NO].serio) + return 0; + + switch (action) { + case BUS_NOTIFY_BOUND_DRIVER: + port->driver_bound = true; + break; + + case BUS_NOTIFY_UNBIND_DRIVER: + port->driver_bound = false; + break; + } + + return 0; +} + +static int i8042_probe(struct platform_device *dev) +{ + int error; + + if (i8042_reset == I8042_RESET_ALWAYS) { + error = i8042_controller_selftest(); + if (error) + return error; + } + + error = i8042_controller_init(); + if (error) + return error; + +#ifdef CONFIG_X86 + if (i8042_dritek) + i8042_dritek_enable(); +#endif + + if (!i8042_noaux) { + error = i8042_setup_aux(); + if (error && error != -ENODEV && error != -EBUSY) + goto out_fail; + } + + if (!i8042_nokbd) { + error = i8042_setup_kbd(); + if (error) + goto out_fail; + } +/* + * Ok, everything is ready, let's register all serio ports + */ + i8042_register_ports(); + + return 0; + + out_fail: + i8042_free_aux_ports(); /* in case KBD failed but AUX not */ + i8042_free_irqs(); + i8042_controller_reset(false); + + return error; +} + +static int i8042_remove(struct platform_device *dev) +{ + i8042_unregister_ports(); + i8042_free_irqs(); + i8042_controller_reset(false); + + return 0; +} + +static struct platform_driver i8042_driver = { + .driver = { + .name = "i8042", +#ifdef CONFIG_PM + .pm = &i8042_pm_ops, +#endif + }, + .probe = i8042_probe, + .remove = i8042_remove, + .shutdown = i8042_shutdown, +}; + +static struct notifier_block i8042_kbd_bind_notifier_block = { + .notifier_call = i8042_kbd_bind_notifier, +}; + +static int __init i8042_init(void) +{ + int err; + + dbg_init(); + + err = i8042_platform_init(); + if (err) + return (err == -ENODEV) ? 0 : err; + + err = i8042_controller_check(); + if (err) + goto err_platform_exit; + + /* Set this before creating the dev to allow i8042_command to work right away */ + i8042_present = true; + + err = platform_driver_register(&i8042_driver); + if (err) + goto err_platform_exit; + + i8042_platform_device = platform_device_alloc("i8042", -1); + if (!i8042_platform_device) { + err = -ENOMEM; + goto err_unregister_driver; + } + + err = platform_device_add(i8042_platform_device); + if (err) + goto err_free_device; + + bus_register_notifier(&serio_bus, &i8042_kbd_bind_notifier_block); + panic_blink = i8042_panic_blink; + + return 0; + +err_free_device: + platform_device_put(i8042_platform_device); +err_unregister_driver: + platform_driver_unregister(&i8042_driver); + err_platform_exit: + i8042_platform_exit(); + return err; +} + +static void __exit i8042_exit(void) +{ + if (!i8042_present) + return; + + platform_device_unregister(i8042_platform_device); + platform_driver_unregister(&i8042_driver); + i8042_platform_exit(); + + bus_unregister_notifier(&serio_bus, &i8042_kbd_bind_notifier_block); + panic_blink = NULL; +} + +module_init(i8042_init); +module_exit(i8042_exit); diff --git a/drivers/input/serio/i8042.h b/drivers/input/serio/i8042.h new file mode 100644 index 000000000..adb517337 --- /dev/null +++ b/drivers/input/serio/i8042.h @@ -0,0 +1,91 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _I8042_H +#define _I8042_H + + +/* + * Copyright (c) 1999-2002 Vojtech Pavlik + */ + +/* + * Arch-dependent inline functions and defines. + */ + +#if defined(CONFIG_MACH_JAZZ) +#include "i8042-jazzio.h" +#elif defined(CONFIG_SGI_HAS_I8042) +#include "i8042-ip22io.h" +#elif defined(CONFIG_SNI_RM) +#include "i8042-snirm.h" +#elif defined(CONFIG_SPARC) +#include "i8042-sparcio.h" +#elif defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_LOONGARCH) +#include "i8042-acpipnpio.h" +#else +#include "i8042-io.h" +#endif + +/* + * This is in 50us units, the time we wait for the i8042 to react. This + * has to be long enough for the i8042 itself to timeout on sending a byte + * to a non-existent mouse. + */ + +#define I8042_CTL_TIMEOUT 10000 + +/* + * Return codes. + */ + +#define I8042_RET_CTL_TEST 0x55 + +/* + * Expected maximum internal i8042 buffer size. This is used for flushing + * the i8042 buffers. + */ + +#define I8042_BUFFER_SIZE 16 + +/* + * Number of AUX ports on controllers supporting active multiplexing + * specification + */ + +#define I8042_NUM_MUX_PORTS 4 + +/* + * Debug. + */ + +#ifdef DEBUG +static unsigned long i8042_start_time; +#define dbg_init() do { i8042_start_time = jiffies; } while (0) +#define dbg(format, arg...) \ + do { \ + if (i8042_debug) \ + printk(KERN_DEBUG KBUILD_MODNAME ": [%d] " format, \ + (int) (jiffies - i8042_start_time), ##arg); \ + } while (0) + +#define filter_dbg(filter, data, format, args...) \ + do { \ + if (!i8042_debug) \ + break; \ + \ + if (!filter || i8042_unmask_kbd_data) \ + dbg("%02x " format, data, ##args); \ + else \ + dbg("** " format, ##args); \ + } while (0) +#else +#define dbg_init() do { } while (0) +#define dbg(format, arg...) \ + do { \ + if (0) \ + printk(KERN_DEBUG pr_fmt(format), ##arg); \ + } while (0) + +#define filter_dbg(filter, data, format, args...) do { } while (0) +#endif + +#endif /* _I8042_H */ diff --git a/drivers/input/serio/ioc3kbd.c b/drivers/input/serio/ioc3kbd.c new file mode 100644 index 000000000..d51bfe912 --- /dev/null +++ b/drivers/input/serio/ioc3kbd.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SGI IOC3 PS/2 controller driver for linux + * + * Copyright (C) 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de> + * + * Based on code Copyright (C) 2005 Stanislaw Skowronek <skylark@unaligned.org> + * Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de> + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/serio.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <asm/sn/ioc3.h> + +struct ioc3kbd_data { + struct ioc3_serioregs __iomem *regs; + struct serio *kbd, *aux; + bool kbd_exists, aux_exists; + int irq; +}; + +static int ioc3kbd_wait(struct ioc3_serioregs __iomem *regs, u32 mask) +{ + unsigned long timeout = 0; + + while ((readl(®s->km_csr) & mask) && (timeout < 250)) { + udelay(50); + timeout++; + } + return (timeout >= 250) ? -ETIMEDOUT : 0; +} + +static int ioc3kbd_write(struct serio *dev, u8 val) +{ + struct ioc3kbd_data *d = dev->port_data; + int ret; + + ret = ioc3kbd_wait(d->regs, KM_CSR_K_WRT_PEND); + if (ret) + return ret; + + writel(val, &d->regs->k_wd); + + return 0; +} + +static int ioc3kbd_start(struct serio *dev) +{ + struct ioc3kbd_data *d = dev->port_data; + + d->kbd_exists = true; + return 0; +} + +static void ioc3kbd_stop(struct serio *dev) +{ + struct ioc3kbd_data *d = dev->port_data; + + d->kbd_exists = false; +} + +static int ioc3aux_write(struct serio *dev, u8 val) +{ + struct ioc3kbd_data *d = dev->port_data; + int ret; + + ret = ioc3kbd_wait(d->regs, KM_CSR_M_WRT_PEND); + if (ret) + return ret; + + writel(val, &d->regs->m_wd); + + return 0; +} + +static int ioc3aux_start(struct serio *dev) +{ + struct ioc3kbd_data *d = dev->port_data; + + d->aux_exists = true; + return 0; +} + +static void ioc3aux_stop(struct serio *dev) +{ + struct ioc3kbd_data *d = dev->port_data; + + d->aux_exists = false; +} + +static void ioc3kbd_process_data(struct serio *dev, u32 data) +{ + if (data & KM_RD_VALID_0) + serio_interrupt(dev, (data >> KM_RD_DATA_0_SHIFT) & 0xff, 0); + if (data & KM_RD_VALID_1) + serio_interrupt(dev, (data >> KM_RD_DATA_1_SHIFT) & 0xff, 0); + if (data & KM_RD_VALID_2) + serio_interrupt(dev, (data >> KM_RD_DATA_2_SHIFT) & 0xff, 0); +} + +static irqreturn_t ioc3kbd_intr(int itq, void *dev_id) +{ + struct ioc3kbd_data *d = dev_id; + u32 data_k, data_m; + + data_k = readl(&d->regs->k_rd); + if (d->kbd_exists) + ioc3kbd_process_data(d->kbd, data_k); + + data_m = readl(&d->regs->m_rd); + if (d->aux_exists) + ioc3kbd_process_data(d->aux, data_m); + + return IRQ_HANDLED; +} + +static int ioc3kbd_probe(struct platform_device *pdev) +{ + struct ioc3_serioregs __iomem *regs; + struct device *dev = &pdev->dev; + struct ioc3kbd_data *d; + struct serio *sk, *sa; + int irq, ret; + + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENXIO; + + d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); + if (!d) + return -ENOMEM; + + sk = kzalloc(sizeof(*sk), GFP_KERNEL); + if (!sk) + return -ENOMEM; + + sa = kzalloc(sizeof(*sa), GFP_KERNEL); + if (!sa) { + kfree(sk); + return -ENOMEM; + } + + sk->id.type = SERIO_8042; + sk->write = ioc3kbd_write; + sk->start = ioc3kbd_start; + sk->stop = ioc3kbd_stop; + snprintf(sk->name, sizeof(sk->name), "IOC3 keyboard %d", pdev->id); + snprintf(sk->phys, sizeof(sk->phys), "ioc3/serio%dkbd", pdev->id); + sk->port_data = d; + sk->dev.parent = dev; + + sa->id.type = SERIO_8042; + sa->write = ioc3aux_write; + sa->start = ioc3aux_start; + sa->stop = ioc3aux_stop; + snprintf(sa->name, sizeof(sa->name), "IOC3 auxiliary %d", pdev->id); + snprintf(sa->phys, sizeof(sa->phys), "ioc3/serio%daux", pdev->id); + sa->port_data = d; + sa->dev.parent = dev; + + d->regs = regs; + d->kbd = sk; + d->aux = sa; + d->irq = irq; + + platform_set_drvdata(pdev, d); + serio_register_port(d->kbd); + serio_register_port(d->aux); + + ret = request_irq(irq, ioc3kbd_intr, IRQF_SHARED, "ioc3-kbd", d); + if (ret) { + dev_err(dev, "could not request IRQ %d\n", irq); + serio_unregister_port(d->kbd); + serio_unregister_port(d->aux); + return ret; + } + + /* enable ports */ + writel(KM_CSR_K_CLAMP_3 | KM_CSR_M_CLAMP_3, ®s->km_csr); + + return 0; +} + +static int ioc3kbd_remove(struct platform_device *pdev) +{ + struct ioc3kbd_data *d = platform_get_drvdata(pdev); + + free_irq(d->irq, d); + + serio_unregister_port(d->kbd); + serio_unregister_port(d->aux); + + return 0; +} + +static struct platform_driver ioc3kbd_driver = { + .probe = ioc3kbd_probe, + .remove = ioc3kbd_remove, + .driver = { + .name = "ioc3-kbd", + }, +}; +module_platform_driver(ioc3kbd_driver); + +MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>"); +MODULE_DESCRIPTION("SGI IOC3 serio driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c new file mode 100644 index 000000000..3e19344ed --- /dev/null +++ b/drivers/input/serio/libps2.c @@ -0,0 +1,494 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PS/2 driver library + * + * Copyright (c) 1999-2002 Vojtech Pavlik + * Copyright (c) 2004 Dmitry Torokhov + */ + + +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/input.h> +#include <linux/kmsan-checks.h> +#include <linux/serio.h> +#include <linux/i8042.h> +#include <linux/libps2.h> + +#define DRIVER_DESC "PS/2 driver library" + +MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>"); +MODULE_DESCRIPTION("PS/2 driver library"); +MODULE_LICENSE("GPL"); + +static int ps2_do_sendbyte(struct ps2dev *ps2dev, u8 byte, + unsigned int timeout, unsigned int max_attempts) + __releases(&ps2dev->serio->lock) __acquires(&ps2dev->serio->lock) +{ + int attempt = 0; + int error; + + lockdep_assert_held(&ps2dev->serio->lock); + + do { + ps2dev->nak = 1; + ps2dev->flags |= PS2_FLAG_ACK; + + serio_continue_rx(ps2dev->serio); + + error = serio_write(ps2dev->serio, byte); + if (error) + dev_dbg(&ps2dev->serio->dev, + "failed to write %#02x: %d\n", byte, error); + else + wait_event_timeout(ps2dev->wait, + !(ps2dev->flags & PS2_FLAG_ACK), + msecs_to_jiffies(timeout)); + + serio_pause_rx(ps2dev->serio); + } while (ps2dev->nak == PS2_RET_NAK && ++attempt < max_attempts); + + ps2dev->flags &= ~PS2_FLAG_ACK; + + if (!error) { + switch (ps2dev->nak) { + case 0: + break; + case PS2_RET_NAK: + error = -EAGAIN; + break; + case PS2_RET_ERR: + error = -EPROTO; + break; + default: + error = -EIO; + break; + } + } + + if (error || attempt > 1) + dev_dbg(&ps2dev->serio->dev, + "%02x - %d (%x), attempt %d\n", + byte, error, ps2dev->nak, attempt); + + return error; +} + +/* + * ps2_sendbyte() sends a byte to the device and waits for acknowledge. + * It doesn't handle retransmission, the caller is expected to handle + * it when needed. + * + * ps2_sendbyte() can only be called from a process context. + */ + +int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout) +{ + int retval; + + serio_pause_rx(ps2dev->serio); + + retval = ps2_do_sendbyte(ps2dev, byte, timeout, 1); + dev_dbg(&ps2dev->serio->dev, "%02x - %x\n", byte, ps2dev->nak); + + serio_continue_rx(ps2dev->serio); + + return retval; +} +EXPORT_SYMBOL(ps2_sendbyte); + +void ps2_begin_command(struct ps2dev *ps2dev) +{ + struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex; + + mutex_lock(m); +} +EXPORT_SYMBOL(ps2_begin_command); + +void ps2_end_command(struct ps2dev *ps2dev) +{ + struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex; + + mutex_unlock(m); +} +EXPORT_SYMBOL(ps2_end_command); + +/* + * ps2_drain() waits for device to transmit requested number of bytes + * and discards them. + */ + +void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout) +{ + if (maxbytes > sizeof(ps2dev->cmdbuf)) { + WARN_ON(1); + maxbytes = sizeof(ps2dev->cmdbuf); + } + + ps2_begin_command(ps2dev); + + serio_pause_rx(ps2dev->serio); + ps2dev->flags = PS2_FLAG_CMD; + ps2dev->cmdcnt = maxbytes; + serio_continue_rx(ps2dev->serio); + + wait_event_timeout(ps2dev->wait, + !(ps2dev->flags & PS2_FLAG_CMD), + msecs_to_jiffies(timeout)); + + ps2_end_command(ps2dev); +} +EXPORT_SYMBOL(ps2_drain); + +/* + * ps2_is_keyboard_id() checks received ID byte against the list of + * known keyboard IDs. + */ + +bool ps2_is_keyboard_id(u8 id_byte) +{ + static const u8 keyboard_ids[] = { + 0xab, /* Regular keyboards */ + 0xac, /* NCD Sun keyboard */ + 0x2b, /* Trust keyboard, translated */ + 0x5d, /* Trust keyboard */ + 0x60, /* NMB SGI keyboard, translated */ + 0x47, /* NMB SGI keyboard */ + }; + + return memchr(keyboard_ids, id_byte, sizeof(keyboard_ids)) != NULL; +} +EXPORT_SYMBOL(ps2_is_keyboard_id); + +/* + * ps2_adjust_timeout() is called after receiving 1st byte of command + * response and tries to reduce remaining timeout to speed up command + * completion. + */ + +static int ps2_adjust_timeout(struct ps2dev *ps2dev, + unsigned int command, unsigned int timeout) +{ + switch (command) { + case PS2_CMD_RESET_BAT: + /* + * Device has sent the first response byte after + * reset command, reset is thus done, so we can + * shorten the timeout. + * The next byte will come soon (keyboard) or not + * at all (mouse). + */ + if (timeout > msecs_to_jiffies(100)) + timeout = msecs_to_jiffies(100); + break; + + case PS2_CMD_GETID: + /* + * Microsoft Natural Elite keyboard responds to + * the GET ID command as it were a mouse, with + * a single byte. Fail the command so atkbd will + * use alternative probe to detect it. + */ + if (ps2dev->cmdbuf[1] == 0xaa) { + serio_pause_rx(ps2dev->serio); + ps2dev->flags = 0; + serio_continue_rx(ps2dev->serio); + timeout = 0; + } + + /* + * If device behind the port is not a keyboard there + * won't be 2nd byte of ID response. + */ + if (!ps2_is_keyboard_id(ps2dev->cmdbuf[1])) { + serio_pause_rx(ps2dev->serio); + ps2dev->flags = ps2dev->cmdcnt = 0; + serio_continue_rx(ps2dev->serio); + timeout = 0; + } + break; + + default: + break; + } + + return timeout; +} + +/* + * ps2_command() sends a command and its parameters to the mouse, + * then waits for the response and puts it in the param array. + * + * ps2_command() can only be called from a process context + */ + +int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command) +{ + unsigned int timeout; + unsigned int send = (command >> 12) & 0xf; + unsigned int receive = (command >> 8) & 0xf; + int rc; + int i; + u8 send_param[16]; + + if (receive > sizeof(ps2dev->cmdbuf)) { + WARN_ON(1); + return -EINVAL; + } + + if (send && !param) { + WARN_ON(1); + return -EINVAL; + } + + memcpy(send_param, param, send); + + serio_pause_rx(ps2dev->serio); + + ps2dev->flags = command == PS2_CMD_GETID ? PS2_FLAG_WAITID : 0; + ps2dev->cmdcnt = receive; + if (receive && param) + for (i = 0; i < receive; i++) + ps2dev->cmdbuf[(receive - 1) - i] = param[i]; + + /* Signal that we are sending the command byte */ + ps2dev->flags |= PS2_FLAG_ACK_CMD; + + /* + * Some devices (Synaptics) peform the reset before + * ACKing the reset command, and so it can take a long + * time before the ACK arrives. + */ + timeout = command == PS2_CMD_RESET_BAT ? 1000 : 200; + + rc = ps2_do_sendbyte(ps2dev, command & 0xff, timeout, 2); + if (rc) + goto out_reset_flags; + + /* Now we are sending command parameters, if any */ + ps2dev->flags &= ~PS2_FLAG_ACK_CMD; + + for (i = 0; i < send; i++) { + rc = ps2_do_sendbyte(ps2dev, param[i], 200, 2); + if (rc) + goto out_reset_flags; + } + + serio_continue_rx(ps2dev->serio); + + /* + * The reset command takes a long time to execute. + */ + timeout = msecs_to_jiffies(command == PS2_CMD_RESET_BAT ? 4000 : 500); + + timeout = wait_event_timeout(ps2dev->wait, + !(ps2dev->flags & PS2_FLAG_CMD1), timeout); + + if (ps2dev->cmdcnt && !(ps2dev->flags & PS2_FLAG_CMD1)) { + + timeout = ps2_adjust_timeout(ps2dev, command, timeout); + wait_event_timeout(ps2dev->wait, + !(ps2dev->flags & PS2_FLAG_CMD), timeout); + } + + serio_pause_rx(ps2dev->serio); + + if (param) { + for (i = 0; i < receive; i++) + param[i] = ps2dev->cmdbuf[(receive - 1) - i]; + kmsan_unpoison_memory(param, receive); + } + + if (ps2dev->cmdcnt && + (command != PS2_CMD_RESET_BAT || ps2dev->cmdcnt != 1)) { + rc = -EPROTO; + goto out_reset_flags; + } + + rc = 0; + + out_reset_flags: + ps2dev->flags = 0; + serio_continue_rx(ps2dev->serio); + + dev_dbg(&ps2dev->serio->dev, + "%02x [%*ph] - %x/%08lx [%*ph]\n", + command & 0xff, send, send_param, + ps2dev->nak, ps2dev->flags, + receive, param ?: send_param); + + /* + * ps_command() handles resends itself, so do not leak -EAGAIN + * to the callers. + */ + return rc != -EAGAIN ? rc : -EPROTO; +} +EXPORT_SYMBOL(__ps2_command); + +int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command) +{ + int rc; + + ps2_begin_command(ps2dev); + rc = __ps2_command(ps2dev, param, command); + ps2_end_command(ps2dev); + + return rc; +} +EXPORT_SYMBOL(ps2_command); + +/* + * ps2_sliced_command() sends an extended PS/2 command to the mouse + * using sliced syntax, understood by advanced devices, such as Logitech + * or Synaptics touchpads. The command is encoded as: + * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu + * is the command. + */ + +int ps2_sliced_command(struct ps2dev *ps2dev, u8 command) +{ + int i; + int retval; + + ps2_begin_command(ps2dev); + + retval = __ps2_command(ps2dev, NULL, PS2_CMD_SETSCALE11); + if (retval) + goto out; + + for (i = 6; i >= 0; i -= 2) { + u8 d = (command >> i) & 3; + retval = __ps2_command(ps2dev, &d, PS2_CMD_SETRES); + if (retval) + break; + } + +out: + dev_dbg(&ps2dev->serio->dev, "%02x - %d\n", command, retval); + ps2_end_command(ps2dev); + return retval; +} +EXPORT_SYMBOL(ps2_sliced_command); + +/* + * ps2_init() initializes ps2dev structure + */ + +void ps2_init(struct ps2dev *ps2dev, struct serio *serio) +{ + mutex_init(&ps2dev->cmd_mutex); + lockdep_set_subclass(&ps2dev->cmd_mutex, serio->depth); + init_waitqueue_head(&ps2dev->wait); + ps2dev->serio = serio; +} +EXPORT_SYMBOL(ps2_init); + +/* + * ps2_handle_ack() is supposed to be used in interrupt handler + * to properly process ACK/NAK of a command from a PS/2 device. + */ + +bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data) +{ + switch (data) { + case PS2_RET_ACK: + ps2dev->nak = 0; + break; + + case PS2_RET_NAK: + ps2dev->flags |= PS2_FLAG_NAK; + ps2dev->nak = PS2_RET_NAK; + break; + + case PS2_RET_ERR: + if (ps2dev->flags & PS2_FLAG_NAK) { + ps2dev->flags &= ~PS2_FLAG_NAK; + ps2dev->nak = PS2_RET_ERR; + break; + } + fallthrough; + + /* + * Workaround for mice which don't ACK the Get ID command. + * These are valid mouse IDs that we recognize. + */ + case 0x00: + case 0x03: + case 0x04: + if (ps2dev->flags & PS2_FLAG_WAITID) { + ps2dev->nak = 0; + break; + } + fallthrough; + default: + /* + * Do not signal errors if we get unexpected reply while + * waiting for an ACK to the initial (first) command byte: + * the device might not be quiesced yet and continue + * delivering data. + * Note that we reset PS2_FLAG_WAITID flag, so the workaround + * for mice not acknowledging the Get ID command only triggers + * on the 1st byte; if device spews data we really want to see + * a real ACK from it. + */ + dev_dbg(&ps2dev->serio->dev, "unexpected %#02x\n", data); + ps2dev->flags &= ~PS2_FLAG_WAITID; + return ps2dev->flags & PS2_FLAG_ACK_CMD; + } + + if (!ps2dev->nak) { + ps2dev->flags &= ~PS2_FLAG_NAK; + if (ps2dev->cmdcnt) + ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1; + } + + ps2dev->flags &= ~PS2_FLAG_ACK; + wake_up(&ps2dev->wait); + + if (data != PS2_RET_ACK) + ps2_handle_response(ps2dev, data); + + return true; +} +EXPORT_SYMBOL(ps2_handle_ack); + +/* + * ps2_handle_response() is supposed to be used in interrupt handler + * to properly store device's response to a command and notify process + * waiting for completion of the command. + */ + +bool ps2_handle_response(struct ps2dev *ps2dev, u8 data) +{ + if (ps2dev->cmdcnt) + ps2dev->cmdbuf[--ps2dev->cmdcnt] = data; + + if (ps2dev->flags & PS2_FLAG_CMD1) { + ps2dev->flags &= ~PS2_FLAG_CMD1; + if (ps2dev->cmdcnt) + wake_up(&ps2dev->wait); + } + + if (!ps2dev->cmdcnt) { + ps2dev->flags &= ~PS2_FLAG_CMD; + wake_up(&ps2dev->wait); + } + + return true; +} +EXPORT_SYMBOL(ps2_handle_response); + +void ps2_cmd_aborted(struct ps2dev *ps2dev) +{ + if (ps2dev->flags & PS2_FLAG_ACK) + ps2dev->nak = 1; + + if (ps2dev->flags & (PS2_FLAG_ACK | PS2_FLAG_CMD)) + wake_up(&ps2dev->wait); + + /* reset all flags except last nack */ + ps2dev->flags &= PS2_FLAG_NAK; +} +EXPORT_SYMBOL(ps2_cmd_aborted); diff --git a/drivers/input/serio/maceps2.c b/drivers/input/serio/maceps2.c new file mode 100644 index 000000000..629e15089 --- /dev/null +++ b/drivers/input/serio/maceps2.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SGI O2 MACE PS2 controller driver for linux + * + * Copyright (C) 2002 Vivien Chappelier + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/err.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/ip32/mace.h> +#include <asm/ip32/ip32_ints.h> + +MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org"); +MODULE_DESCRIPTION("SGI O2 MACE PS2 controller driver"); +MODULE_LICENSE("GPL"); + +#define MACE_PS2_TIMEOUT 10000 /* in 50us unit */ + +#define PS2_STATUS_CLOCK_SIGNAL BIT(0) /* external clock signal */ +#define PS2_STATUS_CLOCK_INHIBIT BIT(1) /* clken output signal */ +#define PS2_STATUS_TX_INPROGRESS BIT(2) /* transmission in progress */ +#define PS2_STATUS_TX_EMPTY BIT(3) /* empty transmit buffer */ +#define PS2_STATUS_RX_FULL BIT(4) /* full receive buffer */ +#define PS2_STATUS_RX_INPROGRESS BIT(5) /* reception in progress */ +#define PS2_STATUS_ERROR_PARITY BIT(6) /* parity error */ +#define PS2_STATUS_ERROR_FRAMING BIT(7) /* framing error */ + +#define PS2_CONTROL_TX_CLOCK_DISABLE BIT(0) /* inhibit clock signal after TX */ +#define PS2_CONTROL_TX_ENABLE BIT(1) /* transmit enable */ +#define PS2_CONTROL_TX_INT_ENABLE BIT(2) /* enable transmit interrupt */ +#define PS2_CONTROL_RX_INT_ENABLE BIT(3) /* enable receive interrupt */ +#define PS2_CONTROL_RX_CLOCK_ENABLE BIT(4) /* pause reception if set to 0 */ +#define PS2_CONTROL_RESET BIT(5) /* reset */ + +struct maceps2_data { + struct mace_ps2port *port; + int irq; +}; + +static struct maceps2_data port_data[2]; +static struct serio *maceps2_port[2]; +static struct platform_device *maceps2_device; + +static int maceps2_write(struct serio *dev, unsigned char val) +{ + struct mace_ps2port *port = ((struct maceps2_data *)dev->port_data)->port; + unsigned int timeout = MACE_PS2_TIMEOUT; + + do { + if (port->status & PS2_STATUS_TX_EMPTY) { + port->tx = val; + return 0; + } + udelay(50); + } while (timeout--); + + return -1; +} + +static irqreturn_t maceps2_interrupt(int irq, void *dev_id) +{ + struct serio *dev = dev_id; + struct mace_ps2port *port = ((struct maceps2_data *)dev->port_data)->port; + unsigned long byte; + + if (port->status & PS2_STATUS_RX_FULL) { + byte = port->rx; + serio_interrupt(dev, byte & 0xff, 0); + } + + return IRQ_HANDLED; +} + +static int maceps2_open(struct serio *dev) +{ + struct maceps2_data *data = (struct maceps2_data *)dev->port_data; + + if (request_irq(data->irq, maceps2_interrupt, 0, "PS2 port", dev)) { + printk(KERN_ERR "Could not allocate PS/2 IRQ\n"); + return -EBUSY; + } + + /* Reset port */ + data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE | PS2_CONTROL_RESET; + udelay(100); + + /* Enable interrupts */ + data->port->control = PS2_CONTROL_RX_CLOCK_ENABLE | + PS2_CONTROL_TX_ENABLE | + PS2_CONTROL_RX_INT_ENABLE; + + return 0; +} + +static void maceps2_close(struct serio *dev) +{ + struct maceps2_data *data = (struct maceps2_data *)dev->port_data; + + data->port->control = PS2_CONTROL_TX_CLOCK_DISABLE | PS2_CONTROL_RESET; + udelay(100); + free_irq(data->irq, dev); +} + + +static struct serio *maceps2_allocate_port(int idx) +{ + struct serio *serio; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (serio) { + serio->id.type = SERIO_8042; + serio->write = maceps2_write; + serio->open = maceps2_open; + serio->close = maceps2_close; + snprintf(serio->name, sizeof(serio->name), "MACE PS/2 port%d", idx); + snprintf(serio->phys, sizeof(serio->phys), "mace/serio%d", idx); + serio->port_data = &port_data[idx]; + serio->dev.parent = &maceps2_device->dev; + } + + return serio; +} + +static int maceps2_probe(struct platform_device *dev) +{ + maceps2_port[0] = maceps2_allocate_port(0); + maceps2_port[1] = maceps2_allocate_port(1); + if (!maceps2_port[0] || !maceps2_port[1]) { + kfree(maceps2_port[0]); + kfree(maceps2_port[1]); + return -ENOMEM; + } + + serio_register_port(maceps2_port[0]); + serio_register_port(maceps2_port[1]); + + return 0; +} + +static int maceps2_remove(struct platform_device *dev) +{ + serio_unregister_port(maceps2_port[0]); + serio_unregister_port(maceps2_port[1]); + + return 0; +} + +static struct platform_driver maceps2_driver = { + .driver = { + .name = "maceps2", + }, + .probe = maceps2_probe, + .remove = maceps2_remove, +}; + +static int __init maceps2_init(void) +{ + int error; + + error = platform_driver_register(&maceps2_driver); + if (error) + return error; + + maceps2_device = platform_device_alloc("maceps2", -1); + if (!maceps2_device) { + error = -ENOMEM; + goto err_unregister_driver; + } + + port_data[0].port = &mace->perif.ps2.keyb; + port_data[0].irq = MACEISA_KEYB_IRQ; + port_data[1].port = &mace->perif.ps2.mouse; + port_data[1].irq = MACEISA_MOUSE_IRQ; + + error = platform_device_add(maceps2_device); + if (error) + goto err_free_device; + + return 0; + + err_free_device: + platform_device_put(maceps2_device); + err_unregister_driver: + platform_driver_unregister(&maceps2_driver); + return error; +} + +static void __exit maceps2_exit(void) +{ + platform_device_unregister(maceps2_device); + platform_driver_unregister(&maceps2_driver); +} + +module_init(maceps2_init); +module_exit(maceps2_exit); diff --git a/drivers/input/serio/olpc_apsp.c b/drivers/input/serio/olpc_apsp.c new file mode 100644 index 000000000..04d2db982 --- /dev/null +++ b/drivers/input/serio/olpc_apsp.c @@ -0,0 +1,272 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * OLPC serio driver for multiplexed input from Marvell MMP security processor + * + * Copyright (C) 2011-2013 One Laptop Per Child + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/serio.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/delay.h> + +/* + * The OLPC XO-1.75 and XO-4 laptops do not have a hardware PS/2 controller. + * Instead, the OLPC firmware runs a bit-banging PS/2 implementation on an + * otherwise-unused slow processor which is included in the Marvell MMP2/MMP3 + * SoC, known as the "Security Processor" (SP) or "Wireless Trusted Module" + * (WTM). This firmware then reports its results via the WTM registers, + * which we read from the Application Processor (AP, i.e. main CPU) in this + * driver. + * + * On the hardware side we have a PS/2 mouse and an AT keyboard, the data + * is multiplexed through this system. We create a serio port for each one, + * and demultiplex the data accordingly. + */ + +/* WTM register offsets */ +#define SECURE_PROCESSOR_COMMAND 0x40 +#define COMMAND_RETURN_STATUS 0x80 +#define COMMAND_FIFO_STATUS 0xc4 +#define PJ_RST_INTERRUPT 0xc8 +#define PJ_INTERRUPT_MASK 0xcc + +/* + * The upper byte of SECURE_PROCESSOR_COMMAND and COMMAND_RETURN_STATUS is + * used to identify which port (device) is being talked to. The lower byte + * is the data being sent/received. + */ +#define PORT_MASK 0xff00 +#define DATA_MASK 0x00ff +#define PORT_SHIFT 8 +#define KEYBOARD_PORT 0 +#define TOUCHPAD_PORT 1 + +/* COMMAND_FIFO_STATUS */ +#define CMD_CNTR_MASK 0x7 /* Number of pending/unprocessed commands */ +#define MAX_PENDING_CMDS 4 /* from device specs */ + +/* PJ_RST_INTERRUPT */ +#define SP_COMMAND_COMPLETE_RESET 0x1 + +/* PJ_INTERRUPT_MASK */ +#define INT_0 (1 << 0) + +/* COMMAND_FIFO_STATUS */ +#define CMD_STS_MASK 0x100 + +struct olpc_apsp { + struct device *dev; + struct serio *kbio; + struct serio *padio; + void __iomem *base; + int open_count; + int irq; +}; + +static int olpc_apsp_write(struct serio *port, unsigned char val) +{ + struct olpc_apsp *priv = port->port_data; + unsigned int i; + u32 which = 0; + + if (port == priv->padio) + which = TOUCHPAD_PORT << PORT_SHIFT; + else + which = KEYBOARD_PORT << PORT_SHIFT; + + dev_dbg(priv->dev, "olpc_apsp_write which=%x val=%x\n", which, val); + for (i = 0; i < 50; i++) { + u32 sts = readl(priv->base + COMMAND_FIFO_STATUS); + if ((sts & CMD_CNTR_MASK) < MAX_PENDING_CMDS) { + writel(which | val, + priv->base + SECURE_PROCESSOR_COMMAND); + return 0; + } + /* SP busy. This has not been seen in practice. */ + mdelay(1); + } + + dev_dbg(priv->dev, "olpc_apsp_write timeout, status=%x\n", + readl(priv->base + COMMAND_FIFO_STATUS)); + + return -ETIMEDOUT; +} + +static irqreturn_t olpc_apsp_rx(int irq, void *dev_id) +{ + struct olpc_apsp *priv = dev_id; + unsigned int w, tmp; + struct serio *serio; + + /* + * Write 1 to PJ_RST_INTERRUPT to acknowledge and clear the interrupt + * Write 0xff00 to SECURE_PROCESSOR_COMMAND. + */ + tmp = readl(priv->base + PJ_RST_INTERRUPT); + if (!(tmp & SP_COMMAND_COMPLETE_RESET)) { + dev_warn(priv->dev, "spurious interrupt?\n"); + return IRQ_NONE; + } + + w = readl(priv->base + COMMAND_RETURN_STATUS); + dev_dbg(priv->dev, "olpc_apsp_rx %x\n", w); + + if (w >> PORT_SHIFT == KEYBOARD_PORT) + serio = priv->kbio; + else + serio = priv->padio; + + serio_interrupt(serio, w & DATA_MASK, 0); + + /* Ack and clear interrupt */ + writel(tmp | SP_COMMAND_COMPLETE_RESET, priv->base + PJ_RST_INTERRUPT); + writel(PORT_MASK, priv->base + SECURE_PROCESSOR_COMMAND); + + pm_wakeup_event(priv->dev, 1000); + return IRQ_HANDLED; +} + +static int olpc_apsp_open(struct serio *port) +{ + struct olpc_apsp *priv = port->port_data; + unsigned int tmp; + unsigned long l; + + if (priv->open_count++ == 0) { + l = readl(priv->base + COMMAND_FIFO_STATUS); + if (!(l & CMD_STS_MASK)) { + dev_err(priv->dev, "SP cannot accept commands.\n"); + return -EIO; + } + + /* Enable interrupt 0 by clearing its bit */ + tmp = readl(priv->base + PJ_INTERRUPT_MASK); + writel(tmp & ~INT_0, priv->base + PJ_INTERRUPT_MASK); + } + + return 0; +} + +static void olpc_apsp_close(struct serio *port) +{ + struct olpc_apsp *priv = port->port_data; + unsigned int tmp; + + if (--priv->open_count == 0) { + /* Disable interrupt 0 */ + tmp = readl(priv->base + PJ_INTERRUPT_MASK); + writel(tmp | INT_0, priv->base + PJ_INTERRUPT_MASK); + } +} + +static int olpc_apsp_probe(struct platform_device *pdev) +{ + struct serio *kb_serio, *pad_serio; + struct olpc_apsp *priv; + struct resource *res; + int error; + + priv = devm_kzalloc(&pdev->dev, sizeof(struct olpc_apsp), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->base)) { + dev_err(&pdev->dev, "Failed to map WTM registers\n"); + return PTR_ERR(priv->base); + } + + priv->irq = platform_get_irq(pdev, 0); + if (priv->irq < 0) + return priv->irq; + + /* KEYBOARD */ + kb_serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!kb_serio) + return -ENOMEM; + kb_serio->id.type = SERIO_8042_XL; + kb_serio->write = olpc_apsp_write; + kb_serio->open = olpc_apsp_open; + kb_serio->close = olpc_apsp_close; + kb_serio->port_data = priv; + kb_serio->dev.parent = &pdev->dev; + strscpy(kb_serio->name, "sp keyboard", sizeof(kb_serio->name)); + strscpy(kb_serio->phys, "sp/serio0", sizeof(kb_serio->phys)); + priv->kbio = kb_serio; + serio_register_port(kb_serio); + + /* TOUCHPAD */ + pad_serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!pad_serio) { + error = -ENOMEM; + goto err_pad; + } + pad_serio->id.type = SERIO_8042; + pad_serio->write = olpc_apsp_write; + pad_serio->open = olpc_apsp_open; + pad_serio->close = olpc_apsp_close; + pad_serio->port_data = priv; + pad_serio->dev.parent = &pdev->dev; + strscpy(pad_serio->name, "sp touchpad", sizeof(pad_serio->name)); + strscpy(pad_serio->phys, "sp/serio1", sizeof(pad_serio->phys)); + priv->padio = pad_serio; + serio_register_port(pad_serio); + + error = request_irq(priv->irq, olpc_apsp_rx, 0, "olpc-apsp", priv); + if (error) { + dev_err(&pdev->dev, "Failed to request IRQ\n"); + goto err_irq; + } + + device_init_wakeup(priv->dev, 1); + platform_set_drvdata(pdev, priv); + + dev_dbg(&pdev->dev, "probed successfully.\n"); + return 0; + +err_irq: + serio_unregister_port(pad_serio); +err_pad: + serio_unregister_port(kb_serio); + return error; +} + +static int olpc_apsp_remove(struct platform_device *pdev) +{ + struct olpc_apsp *priv = platform_get_drvdata(pdev); + + free_irq(priv->irq, priv); + + serio_unregister_port(priv->kbio); + serio_unregister_port(priv->padio); + + return 0; +} + +static const struct of_device_id olpc_apsp_dt_ids[] = { + { .compatible = "olpc,ap-sp", }, + {} +}; +MODULE_DEVICE_TABLE(of, olpc_apsp_dt_ids); + +static struct platform_driver olpc_apsp_driver = { + .probe = olpc_apsp_probe, + .remove = olpc_apsp_remove, + .driver = { + .name = "olpc-apsp", + .of_match_table = olpc_apsp_dt_ids, + }, +}; + +MODULE_DESCRIPTION("OLPC AP-SP serio driver"); +MODULE_LICENSE("GPL"); +module_platform_driver(olpc_apsp_driver); diff --git a/drivers/input/serio/parkbd.c b/drivers/input/serio/parkbd.c new file mode 100644 index 000000000..0d5489542 --- /dev/null +++ b/drivers/input/serio/parkbd.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Parallel port to Keyboard port adapter driver for Linux + * + * Copyright (c) 1999-2004 Vojtech Pavlik + */ + + +/* + * To connect an AT or XT keyboard to the parallel port, a fairly simple adapter + * can be made: + * + * Parallel port Keyboard port + * + * +5V --------------------- +5V (4) + * + * ______ + * +5V -------|______|--. + * | + * ACK (10) ------------| + * |--- KBD CLOCK (5) + * STROBE (1) ---|<|----' + * + * ______ + * +5V -------|______|--. + * | + * BUSY (11) -----------| + * |--- KBD DATA (1) + * AUTOFD (14) --|<|----' + * + * GND (18-25) ------------- GND (3) + * + * The diodes can be fairly any type, and the resistors should be somewhere + * around 5 kOhm, but the adapter will likely work without the resistors, + * too. + * + * The +5V source can be taken either from USB, from mouse or keyboard ports, + * or from a joystick port. Unfortunately, the parallel port of a PC doesn't + * have a +5V pin, and feeding the keyboard from signal pins is out of question + * with 300 mA power reqirement of a typical AT keyboard. + */ + +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/serio.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("Parallel port to Keyboard port adapter driver"); +MODULE_LICENSE("GPL"); + +static unsigned int parkbd_pp_no; +module_param_named(port, parkbd_pp_no, int, 0); +MODULE_PARM_DESC(port, "Parallel port the adapter is connected to (default is 0)"); + +static unsigned int parkbd_mode = SERIO_8042; +module_param_named(mode, parkbd_mode, uint, 0); +MODULE_PARM_DESC(mode, "Mode of operation: XT = 0/AT = 1 (default)"); + +#define PARKBD_CLOCK 0x01 /* Strobe & Ack */ +#define PARKBD_DATA 0x02 /* AutoFd & Busy */ + +static int parkbd_buffer; +static int parkbd_counter; +static unsigned long parkbd_last; +static int parkbd_writing; +static unsigned long parkbd_start; + +static struct pardevice *parkbd_dev; +static struct serio *parkbd_port; + +static int parkbd_readlines(void) +{ + return (parport_read_status(parkbd_dev->port) >> 6) ^ 2; +} + +static void parkbd_writelines(int data) +{ + parport_write_control(parkbd_dev->port, (~data & 3) | 0x10); +} + +static int parkbd_write(struct serio *port, unsigned char c) +{ + unsigned char p; + + if (!parkbd_mode) return -1; + + p = c ^ (c >> 4); + p = p ^ (p >> 2); + p = p ^ (p >> 1); + + parkbd_counter = 0; + parkbd_writing = 1; + parkbd_buffer = c | (((int) (~p & 1)) << 8) | 0x600; + + parkbd_writelines(2); + + return 0; +} + +static void parkbd_interrupt(void *dev_id) +{ + + if (parkbd_writing) { + + if (parkbd_counter && ((parkbd_counter == 11) || time_after(jiffies, parkbd_last + HZ/100))) { + parkbd_counter = 0; + parkbd_buffer = 0; + parkbd_writing = 0; + parkbd_writelines(3); + return; + } + + parkbd_writelines(((parkbd_buffer >> parkbd_counter++) & 1) | 2); + + if (parkbd_counter == 11) { + parkbd_counter = 0; + parkbd_buffer = 0; + parkbd_writing = 0; + parkbd_writelines(3); + } + + } else { + + if ((parkbd_counter == parkbd_mode + 10) || time_after(jiffies, parkbd_last + HZ/100)) { + parkbd_counter = 0; + parkbd_buffer = 0; + } + + parkbd_buffer |= (parkbd_readlines() >> 1) << parkbd_counter++; + + if (parkbd_counter == parkbd_mode + 10) + serio_interrupt(parkbd_port, (parkbd_buffer >> (2 - parkbd_mode)) & 0xff, 0); + } + + parkbd_last = jiffies; +} + +static int parkbd_getport(struct parport *pp) +{ + struct pardev_cb parkbd_parport_cb; + + memset(&parkbd_parport_cb, 0, sizeof(parkbd_parport_cb)); + parkbd_parport_cb.irq_func = parkbd_interrupt; + parkbd_parport_cb.flags = PARPORT_FLAG_EXCL; + + parkbd_dev = parport_register_dev_model(pp, "parkbd", + &parkbd_parport_cb, 0); + + if (!parkbd_dev) + return -ENODEV; + + if (parport_claim(parkbd_dev)) { + parport_unregister_device(parkbd_dev); + return -EBUSY; + } + + parkbd_start = jiffies; + + return 0; +} + +static struct serio *parkbd_allocate_serio(void) +{ + struct serio *serio; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (serio) { + serio->id.type = parkbd_mode; + serio->write = parkbd_write; + strscpy(serio->name, "PARKBD AT/XT keyboard adapter", sizeof(serio->name)); + snprintf(serio->phys, sizeof(serio->phys), "%s/serio0", parkbd_dev->port->name); + } + + return serio; +} + +static void parkbd_attach(struct parport *pp) +{ + if (pp->number != parkbd_pp_no) { + pr_debug("Not using parport%d.\n", pp->number); + return; + } + + if (parkbd_getport(pp)) + return; + + parkbd_port = parkbd_allocate_serio(); + if (!parkbd_port) { + parport_release(parkbd_dev); + parport_unregister_device(parkbd_dev); + return; + } + + parkbd_writelines(3); + + serio_register_port(parkbd_port); + + printk(KERN_INFO "serio: PARKBD %s adapter on %s\n", + parkbd_mode ? "AT" : "XT", parkbd_dev->port->name); + + return; +} + +static void parkbd_detach(struct parport *port) +{ + if (!parkbd_port || port->number != parkbd_pp_no) + return; + + parport_release(parkbd_dev); + serio_unregister_port(parkbd_port); + parport_unregister_device(parkbd_dev); + parkbd_port = NULL; +} + +static struct parport_driver parkbd_parport_driver = { + .name = "parkbd", + .match_port = parkbd_attach, + .detach = parkbd_detach, + .devmodel = true, +}; +module_parport_driver(parkbd_parport_driver); diff --git a/drivers/input/serio/pcips2.c b/drivers/input/serio/pcips2.c new file mode 100644 index 000000000..05878750f --- /dev/null +++ b/drivers/input/serio/pcips2.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/input/serio/pcips2.c + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * + * I'm not sure if this is a generic PS/2 PCI interface or specific to + * the Mobility Electronics docking station. + */ +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/input.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/serio.h> +#include <linux/delay.h> +#include <asm/io.h> + +#define PS2_CTRL (0) +#define PS2_STATUS (1) +#define PS2_DATA (2) + +#define PS2_CTRL_CLK (1<<0) +#define PS2_CTRL_DAT (1<<1) +#define PS2_CTRL_TXIRQ (1<<2) +#define PS2_CTRL_ENABLE (1<<3) +#define PS2_CTRL_RXIRQ (1<<4) + +#define PS2_STAT_CLK (1<<0) +#define PS2_STAT_DAT (1<<1) +#define PS2_STAT_PARITY (1<<2) +#define PS2_STAT_RXFULL (1<<5) +#define PS2_STAT_TXBUSY (1<<6) +#define PS2_STAT_TXEMPTY (1<<7) + +struct pcips2_data { + struct serio *io; + unsigned int base; + struct pci_dev *dev; +}; + +static int pcips2_write(struct serio *io, unsigned char val) +{ + struct pcips2_data *ps2if = io->port_data; + unsigned int stat; + + do { + stat = inb(ps2if->base + PS2_STATUS); + cpu_relax(); + } while (!(stat & PS2_STAT_TXEMPTY)); + + outb(val, ps2if->base + PS2_DATA); + + return 0; +} + +static irqreturn_t pcips2_interrupt(int irq, void *devid) +{ + struct pcips2_data *ps2if = devid; + unsigned char status, scancode; + int handled = 0; + + do { + unsigned int flag; + + status = inb(ps2if->base + PS2_STATUS); + if (!(status & PS2_STAT_RXFULL)) + break; + handled = 1; + scancode = inb(ps2if->base + PS2_DATA); + if (status == 0xff && scancode == 0xff) + break; + + flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY; + + if (hweight8(scancode) & 1) + flag ^= SERIO_PARITY; + + serio_interrupt(ps2if->io, scancode, flag); + } while (1); + return IRQ_RETVAL(handled); +} + +static void pcips2_flush_input(struct pcips2_data *ps2if) +{ + unsigned char status, scancode; + + do { + status = inb(ps2if->base + PS2_STATUS); + if (!(status & PS2_STAT_RXFULL)) + break; + scancode = inb(ps2if->base + PS2_DATA); + if (status == 0xff && scancode == 0xff) + break; + } while (1); +} + +static int pcips2_open(struct serio *io) +{ + struct pcips2_data *ps2if = io->port_data; + int ret, val = 0; + + outb(PS2_CTRL_ENABLE, ps2if->base); + pcips2_flush_input(ps2if); + + ret = request_irq(ps2if->dev->irq, pcips2_interrupt, IRQF_SHARED, + "pcips2", ps2if); + if (ret == 0) + val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ; + + outb(val, ps2if->base); + + return ret; +} + +static void pcips2_close(struct serio *io) +{ + struct pcips2_data *ps2if = io->port_data; + + outb(0, ps2if->base); + + free_irq(ps2if->dev->irq, ps2if); +} + +static int pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct pcips2_data *ps2if; + struct serio *serio; + int ret; + + ret = pci_enable_device(dev); + if (ret) + goto out; + + ret = pci_request_regions(dev, "pcips2"); + if (ret) + goto disable; + + ps2if = kzalloc(sizeof(struct pcips2_data), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!ps2if || !serio) { + ret = -ENOMEM; + goto release; + } + + + serio->id.type = SERIO_8042; + serio->write = pcips2_write; + serio->open = pcips2_open; + serio->close = pcips2_close; + strscpy(serio->name, pci_name(dev), sizeof(serio->name)); + strscpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys)); + serio->port_data = ps2if; + serio->dev.parent = &dev->dev; + ps2if->io = serio; + ps2if->dev = dev; + ps2if->base = pci_resource_start(dev, 0); + + pci_set_drvdata(dev, ps2if); + + serio_register_port(ps2if->io); + return 0; + + release: + kfree(ps2if); + kfree(serio); + pci_release_regions(dev); + disable: + pci_disable_device(dev); + out: + return ret; +} + +static void pcips2_remove(struct pci_dev *dev) +{ + struct pcips2_data *ps2if = pci_get_drvdata(dev); + + serio_unregister_port(ps2if->io); + kfree(ps2if); + pci_release_regions(dev); + pci_disable_device(dev); +} + +static const struct pci_device_id pcips2_ids[] = { + { + .vendor = 0x14f2, /* MOBILITY */ + .device = 0x0123, /* Keyboard */ + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .class = PCI_CLASS_INPUT_KEYBOARD << 8, + .class_mask = 0xffff00, + }, + { + .vendor = 0x14f2, /* MOBILITY */ + .device = 0x0124, /* Mouse */ + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .class = PCI_CLASS_INPUT_MOUSE << 8, + .class_mask = 0xffff00, + }, + { 0, } +}; +MODULE_DEVICE_TABLE(pci, pcips2_ids); + +static struct pci_driver pcips2_driver = { + .name = "pcips2", + .id_table = pcips2_ids, + .probe = pcips2_probe, + .remove = pcips2_remove, +}; + +module_pci_driver(pcips2_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); +MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver"); diff --git a/drivers/input/serio/ps2-gpio.c b/drivers/input/serio/ps2-gpio.c new file mode 100644 index 000000000..bc1dc4843 --- /dev/null +++ b/drivers/input/serio/ps2-gpio.c @@ -0,0 +1,507 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * GPIO based serio bus driver for bit banging the PS/2 protocol + * + * Author: Danilo Krummrich <danilokrummrich@dk-develop.de> + */ + +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> +#include <linux/completion.h> +#include <linux/mutex.h> +#include <linux/preempt.h> +#include <linux/property.h> +#include <linux/of.h> +#include <linux/jiffies.h> +#include <linux/delay.h> +#include <linux/timekeeping.h> + +#define DRIVER_NAME "ps2-gpio" + +#define PS2_MODE_RX 0 +#define PS2_MODE_TX 1 + +#define PS2_START_BIT 0 +#define PS2_DATA_BIT0 1 +#define PS2_DATA_BIT1 2 +#define PS2_DATA_BIT2 3 +#define PS2_DATA_BIT3 4 +#define PS2_DATA_BIT4 5 +#define PS2_DATA_BIT5 6 +#define PS2_DATA_BIT6 7 +#define PS2_DATA_BIT7 8 +#define PS2_PARITY_BIT 9 +#define PS2_STOP_BIT 10 +#define PS2_ACK_BIT 11 + +#define PS2_DEV_RET_ACK 0xfa +#define PS2_DEV_RET_NACK 0xfe + +#define PS2_CMD_RESEND 0xfe + +/* + * The PS2 protocol specifies a clock frequency between 10kHz and 16.7kHz, + * therefore the maximal interrupt interval should be 100us and the minimum + * interrupt interval should be ~60us. Let's allow +/- 20us for frequency + * deviations and interrupt latency. + * + * The data line must be samples after ~30us to 50us after the falling edge, + * since the device updates the data line at the rising edge. + * + * ___ ______ ______ ______ ___ + * \ / \ / \ / \ / + * \ / \ / \ / \ / + * \______/ \______/ \______/ \______/ + * + * |-----------------| |--------| + * 60us/100us 30us/50us + */ +#define PS2_CLK_FREQ_MIN_HZ 10000 +#define PS2_CLK_FREQ_MAX_HZ 16700 +#define PS2_CLK_MIN_INTERVAL_US ((1000 * 1000) / PS2_CLK_FREQ_MAX_HZ) +#define PS2_CLK_MAX_INTERVAL_US ((1000 * 1000) / PS2_CLK_FREQ_MIN_HZ) +#define PS2_IRQ_MIN_INTERVAL_US (PS2_CLK_MIN_INTERVAL_US - 20) +#define PS2_IRQ_MAX_INTERVAL_US (PS2_CLK_MAX_INTERVAL_US + 20) + +struct ps2_gpio_data { + struct device *dev; + struct serio *serio; + unsigned char mode; + struct gpio_desc *gpio_clk; + struct gpio_desc *gpio_data; + bool write_enable; + int irq; + ktime_t t_irq_now; + ktime_t t_irq_last; + struct { + unsigned char cnt; + unsigned char byte; + } rx; + struct { + unsigned char cnt; + unsigned char byte; + ktime_t t_xfer_start; + ktime_t t_xfer_end; + struct completion complete; + struct mutex mutex; + struct delayed_work work; + } tx; +}; + +static int ps2_gpio_open(struct serio *serio) +{ + struct ps2_gpio_data *drvdata = serio->port_data; + + drvdata->t_irq_last = 0; + drvdata->tx.t_xfer_end = 0; + + enable_irq(drvdata->irq); + return 0; +} + +static void ps2_gpio_close(struct serio *serio) +{ + struct ps2_gpio_data *drvdata = serio->port_data; + + flush_delayed_work(&drvdata->tx.work); + disable_irq(drvdata->irq); +} + +static int __ps2_gpio_write(struct serio *serio, unsigned char val) +{ + struct ps2_gpio_data *drvdata = serio->port_data; + + disable_irq_nosync(drvdata->irq); + gpiod_direction_output(drvdata->gpio_clk, 0); + + drvdata->mode = PS2_MODE_TX; + drvdata->tx.byte = val; + + schedule_delayed_work(&drvdata->tx.work, usecs_to_jiffies(200)); + + return 0; +} + +static int ps2_gpio_write(struct serio *serio, unsigned char val) +{ + struct ps2_gpio_data *drvdata = serio->port_data; + int ret = 0; + + if (in_task()) { + mutex_lock(&drvdata->tx.mutex); + __ps2_gpio_write(serio, val); + if (!wait_for_completion_timeout(&drvdata->tx.complete, + msecs_to_jiffies(10000))) + ret = SERIO_TIMEOUT; + mutex_unlock(&drvdata->tx.mutex); + } else { + __ps2_gpio_write(serio, val); + } + + return ret; +} + +static void ps2_gpio_tx_work_fn(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct ps2_gpio_data *drvdata = container_of(dwork, + struct ps2_gpio_data, + tx.work); + + drvdata->tx.t_xfer_start = ktime_get(); + enable_irq(drvdata->irq); + gpiod_direction_output(drvdata->gpio_data, 0); + gpiod_direction_input(drvdata->gpio_clk); +} + +static irqreturn_t ps2_gpio_irq_rx(struct ps2_gpio_data *drvdata) +{ + unsigned char byte, cnt; + int data; + int rxflags = 0; + s64 us_delta; + + byte = drvdata->rx.byte; + cnt = drvdata->rx.cnt; + + drvdata->t_irq_now = ktime_get(); + + /* + * We need to consider spurious interrupts happening right after + * a TX xfer finished. + */ + us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->tx.t_xfer_end); + if (unlikely(us_delta < PS2_IRQ_MIN_INTERVAL_US)) + goto end; + + us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->t_irq_last); + if (us_delta > PS2_IRQ_MAX_INTERVAL_US && cnt) { + dev_err(drvdata->dev, + "RX: timeout, probably we missed an interrupt\n"); + goto err; + } else if (unlikely(us_delta < PS2_IRQ_MIN_INTERVAL_US)) { + /* Ignore spurious IRQs. */ + goto end; + } + drvdata->t_irq_last = drvdata->t_irq_now; + + data = gpiod_get_value(drvdata->gpio_data); + if (unlikely(data < 0)) { + dev_err(drvdata->dev, "RX: failed to get data gpio val: %d\n", + data); + goto err; + } + + switch (cnt) { + case PS2_START_BIT: + /* start bit should be low */ + if (unlikely(data)) { + dev_err(drvdata->dev, "RX: start bit should be low\n"); + goto err; + } + break; + case PS2_DATA_BIT0: + case PS2_DATA_BIT1: + case PS2_DATA_BIT2: + case PS2_DATA_BIT3: + case PS2_DATA_BIT4: + case PS2_DATA_BIT5: + case PS2_DATA_BIT6: + case PS2_DATA_BIT7: + /* processing data bits */ + if (data) + byte |= (data << (cnt - 1)); + break; + case PS2_PARITY_BIT: + /* check odd parity */ + if (!((hweight8(byte) & 1) ^ data)) { + rxflags |= SERIO_PARITY; + dev_warn(drvdata->dev, "RX: parity error\n"); + if (!drvdata->write_enable) + goto err; + } + break; + case PS2_STOP_BIT: + /* stop bit should be high */ + if (unlikely(!data)) { + dev_err(drvdata->dev, "RX: stop bit should be high\n"); + goto err; + } + + /* + * Do not send spurious ACK's and NACK's when write fn is + * not provided. + */ + if (!drvdata->write_enable) { + if (byte == PS2_DEV_RET_NACK) + goto err; + else if (byte == PS2_DEV_RET_ACK) + break; + } + + serio_interrupt(drvdata->serio, byte, rxflags); + dev_dbg(drvdata->dev, "RX: sending byte 0x%x\n", byte); + + cnt = byte = 0; + + goto end; /* success */ + default: + dev_err(drvdata->dev, "RX: got out of sync with the device\n"); + goto err; + } + + cnt++; + goto end; /* success */ + +err: + cnt = byte = 0; + __ps2_gpio_write(drvdata->serio, PS2_CMD_RESEND); +end: + drvdata->rx.cnt = cnt; + drvdata->rx.byte = byte; + return IRQ_HANDLED; +} + +static irqreturn_t ps2_gpio_irq_tx(struct ps2_gpio_data *drvdata) +{ + unsigned char byte, cnt; + int data; + s64 us_delta; + + cnt = drvdata->tx.cnt; + byte = drvdata->tx.byte; + + drvdata->t_irq_now = ktime_get(); + + /* + * There might be pending IRQs since we disabled IRQs in + * __ps2_gpio_write(). We can expect at least one clock period until + * the device generates the first falling edge after releasing the + * clock line. + */ + us_delta = ktime_us_delta(drvdata->t_irq_now, + drvdata->tx.t_xfer_start); + if (unlikely(us_delta < PS2_CLK_MIN_INTERVAL_US)) + goto end; + + us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->t_irq_last); + if (us_delta > PS2_IRQ_MAX_INTERVAL_US && cnt > 1) { + dev_err(drvdata->dev, + "TX: timeout, probably we missed an interrupt\n"); + goto err; + } else if (unlikely(us_delta < PS2_IRQ_MIN_INTERVAL_US)) { + /* Ignore spurious IRQs. */ + goto end; + } + drvdata->t_irq_last = drvdata->t_irq_now; + + switch (cnt) { + case PS2_START_BIT: + /* should never happen */ + dev_err(drvdata->dev, + "TX: start bit should have been sent already\n"); + goto err; + case PS2_DATA_BIT0: + case PS2_DATA_BIT1: + case PS2_DATA_BIT2: + case PS2_DATA_BIT3: + case PS2_DATA_BIT4: + case PS2_DATA_BIT5: + case PS2_DATA_BIT6: + case PS2_DATA_BIT7: + data = byte & BIT(cnt - 1); + gpiod_set_value(drvdata->gpio_data, data); + break; + case PS2_PARITY_BIT: + /* do odd parity */ + data = !(hweight8(byte) & 1); + gpiod_set_value(drvdata->gpio_data, data); + break; + case PS2_STOP_BIT: + /* release data line to generate stop bit */ + gpiod_direction_input(drvdata->gpio_data); + break; + case PS2_ACK_BIT: + data = gpiod_get_value(drvdata->gpio_data); + if (data) { + dev_warn(drvdata->dev, "TX: received NACK, retry\n"); + goto err; + } + + drvdata->tx.t_xfer_end = ktime_get(); + drvdata->mode = PS2_MODE_RX; + complete(&drvdata->tx.complete); + + cnt = 1; + goto end; /* success */ + default: + /* + * Probably we missed the stop bit. Therefore we release data + * line and try again. + */ + gpiod_direction_input(drvdata->gpio_data); + dev_err(drvdata->dev, "TX: got out of sync with the device\n"); + goto err; + } + + cnt++; + goto end; /* success */ + +err: + cnt = 1; + gpiod_direction_input(drvdata->gpio_data); + __ps2_gpio_write(drvdata->serio, drvdata->tx.byte); +end: + drvdata->tx.cnt = cnt; + return IRQ_HANDLED; +} + +static irqreturn_t ps2_gpio_irq(int irq, void *dev_id) +{ + struct ps2_gpio_data *drvdata = dev_id; + + return drvdata->mode ? ps2_gpio_irq_tx(drvdata) : + ps2_gpio_irq_rx(drvdata); +} + +static int ps2_gpio_get_props(struct device *dev, + struct ps2_gpio_data *drvdata) +{ + enum gpiod_flags gflags; + + /* Enforce open drain, since this is required by the PS/2 bus. */ + gflags = GPIOD_IN | GPIOD_FLAGS_BIT_OPEN_DRAIN; + + drvdata->gpio_data = devm_gpiod_get(dev, "data", gflags); + if (IS_ERR(drvdata->gpio_data)) { + dev_err(dev, "failed to request data gpio: %ld", + PTR_ERR(drvdata->gpio_data)); + return PTR_ERR(drvdata->gpio_data); + } + + drvdata->gpio_clk = devm_gpiod_get(dev, "clk", gflags); + if (IS_ERR(drvdata->gpio_clk)) { + dev_err(dev, "failed to request clock gpio: %ld", + PTR_ERR(drvdata->gpio_clk)); + return PTR_ERR(drvdata->gpio_clk); + } + + drvdata->write_enable = device_property_read_bool(dev, + "write-enable"); + + return 0; +} + +static int ps2_gpio_probe(struct platform_device *pdev) +{ + struct ps2_gpio_data *drvdata; + struct serio *serio; + struct device *dev = &pdev->dev; + int error; + + drvdata = devm_kzalloc(dev, sizeof(struct ps2_gpio_data), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!drvdata || !serio) { + error = -ENOMEM; + goto err_free_serio; + } + + error = ps2_gpio_get_props(dev, drvdata); + if (error) + goto err_free_serio; + + if (gpiod_cansleep(drvdata->gpio_data) || + gpiod_cansleep(drvdata->gpio_clk)) { + dev_err(dev, "GPIO data or clk are connected via slow bus\n"); + error = -EINVAL; + goto err_free_serio; + } + + drvdata->irq = platform_get_irq(pdev, 0); + if (drvdata->irq < 0) { + error = drvdata->irq; + goto err_free_serio; + } + + error = devm_request_irq(dev, drvdata->irq, ps2_gpio_irq, + IRQF_NO_THREAD, DRIVER_NAME, drvdata); + if (error) { + dev_err(dev, "failed to request irq %d: %d\n", + drvdata->irq, error); + goto err_free_serio; + } + + /* Keep irq disabled until serio->open is called. */ + disable_irq(drvdata->irq); + + serio->id.type = SERIO_8042; + serio->open = ps2_gpio_open; + serio->close = ps2_gpio_close; + /* + * Write can be enabled in platform/dt data, but possibly it will not + * work because of the tough timings. + */ + serio->write = drvdata->write_enable ? ps2_gpio_write : NULL; + serio->port_data = drvdata; + serio->dev.parent = dev; + strscpy(serio->name, dev_name(dev), sizeof(serio->name)); + strscpy(serio->phys, dev_name(dev), sizeof(serio->phys)); + + drvdata->serio = serio; + drvdata->dev = dev; + drvdata->mode = PS2_MODE_RX; + + /* + * Tx count always starts at 1, as the start bit is sent implicitly by + * host-to-device communication initialization. + */ + drvdata->tx.cnt = 1; + + INIT_DELAYED_WORK(&drvdata->tx.work, ps2_gpio_tx_work_fn); + init_completion(&drvdata->tx.complete); + mutex_init(&drvdata->tx.mutex); + + serio_register_port(serio); + platform_set_drvdata(pdev, drvdata); + + return 0; /* success */ + +err_free_serio: + kfree(serio); + return error; +} + +static int ps2_gpio_remove(struct platform_device *pdev) +{ + struct ps2_gpio_data *drvdata = platform_get_drvdata(pdev); + + serio_unregister_port(drvdata->serio); + return 0; +} + +#if defined(CONFIG_OF) +static const struct of_device_id ps2_gpio_match[] = { + { .compatible = "ps2-gpio", }, + { }, +}; +MODULE_DEVICE_TABLE(of, ps2_gpio_match); +#endif + +static struct platform_driver ps2_gpio_driver = { + .probe = ps2_gpio_probe, + .remove = ps2_gpio_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = of_match_ptr(ps2_gpio_match), + }, +}; +module_platform_driver(ps2_gpio_driver); + +MODULE_AUTHOR("Danilo Krummrich <danilokrummrich@dk-develop.de>"); +MODULE_DESCRIPTION("GPIO PS2 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/input/serio/ps2mult.c b/drivers/input/serio/ps2mult.c new file mode 100644 index 000000000..902e81826 --- /dev/null +++ b/drivers/input/serio/ps2mult.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TQC PS/2 Multiplexer driver + * + * Copyright (C) 2010 Dmitry Eremin-Solenikov + */ + + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/serio.h> + +MODULE_AUTHOR("Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>"); +MODULE_DESCRIPTION("TQC PS/2 Multiplexer driver"); +MODULE_LICENSE("GPL"); + +#define PS2MULT_KB_SELECTOR 0xA0 +#define PS2MULT_MS_SELECTOR 0xA1 +#define PS2MULT_ESCAPE 0x7D +#define PS2MULT_BSYNC 0x7E +#define PS2MULT_SESSION_START 0x55 +#define PS2MULT_SESSION_END 0x56 + +struct ps2mult_port { + struct serio *serio; + unsigned char sel; + bool registered; +}; + +#define PS2MULT_NUM_PORTS 2 +#define PS2MULT_KBD_PORT 0 +#define PS2MULT_MOUSE_PORT 1 + +struct ps2mult { + struct serio *mx_serio; + struct ps2mult_port ports[PS2MULT_NUM_PORTS]; + + spinlock_t lock; + struct ps2mult_port *in_port; + struct ps2mult_port *out_port; + bool escape; +}; + +/* First MUST come PS2MULT_NUM_PORTS selectors */ +static const unsigned char ps2mult_controls[] = { + PS2MULT_KB_SELECTOR, PS2MULT_MS_SELECTOR, + PS2MULT_ESCAPE, PS2MULT_BSYNC, + PS2MULT_SESSION_START, PS2MULT_SESSION_END, +}; + +static const struct serio_device_id ps2mult_serio_ids[] = { + { + .type = SERIO_RS232, + .proto = SERIO_PS2MULT, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(serio, ps2mult_serio_ids); + +static void ps2mult_select_port(struct ps2mult *psm, struct ps2mult_port *port) +{ + struct serio *mx_serio = psm->mx_serio; + + serio_write(mx_serio, port->sel); + psm->out_port = port; + dev_dbg(&mx_serio->dev, "switched to sel %02x\n", port->sel); +} + +static int ps2mult_serio_write(struct serio *serio, unsigned char data) +{ + struct serio *mx_port = serio->parent; + struct ps2mult *psm = serio_get_drvdata(mx_port); + struct ps2mult_port *port = serio->port_data; + bool need_escape; + unsigned long flags; + + spin_lock_irqsave(&psm->lock, flags); + + if (psm->out_port != port) + ps2mult_select_port(psm, port); + + need_escape = memchr(ps2mult_controls, data, sizeof(ps2mult_controls)); + + dev_dbg(&serio->dev, + "write: %s%02x\n", need_escape ? "ESC " : "", data); + + if (need_escape) + serio_write(mx_port, PS2MULT_ESCAPE); + + serio_write(mx_port, data); + + spin_unlock_irqrestore(&psm->lock, flags); + + return 0; +} + +static int ps2mult_serio_start(struct serio *serio) +{ + struct ps2mult *psm = serio_get_drvdata(serio->parent); + struct ps2mult_port *port = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&psm->lock, flags); + port->registered = true; + spin_unlock_irqrestore(&psm->lock, flags); + + return 0; +} + +static void ps2mult_serio_stop(struct serio *serio) +{ + struct ps2mult *psm = serio_get_drvdata(serio->parent); + struct ps2mult_port *port = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&psm->lock, flags); + port->registered = false; + spin_unlock_irqrestore(&psm->lock, flags); +} + +static int ps2mult_create_port(struct ps2mult *psm, int i) +{ + struct serio *mx_serio = psm->mx_serio; + struct serio *serio; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + strscpy(serio->name, "TQC PS/2 Multiplexer", sizeof(serio->name)); + snprintf(serio->phys, sizeof(serio->phys), + "%s/port%d", mx_serio->phys, i); + serio->id.type = SERIO_8042; + serio->write = ps2mult_serio_write; + serio->start = ps2mult_serio_start; + serio->stop = ps2mult_serio_stop; + serio->parent = psm->mx_serio; + serio->port_data = &psm->ports[i]; + + psm->ports[i].serio = serio; + + return 0; +} + +static void ps2mult_reset(struct ps2mult *psm) +{ + unsigned long flags; + + spin_lock_irqsave(&psm->lock, flags); + + serio_write(psm->mx_serio, PS2MULT_SESSION_END); + serio_write(psm->mx_serio, PS2MULT_SESSION_START); + + ps2mult_select_port(psm, &psm->ports[PS2MULT_KBD_PORT]); + + spin_unlock_irqrestore(&psm->lock, flags); +} + +static int ps2mult_connect(struct serio *serio, struct serio_driver *drv) +{ + struct ps2mult *psm; + int i; + int error; + + if (!serio->write) + return -EINVAL; + + psm = kzalloc(sizeof(*psm), GFP_KERNEL); + if (!psm) + return -ENOMEM; + + spin_lock_init(&psm->lock); + psm->mx_serio = serio; + + for (i = 0; i < PS2MULT_NUM_PORTS; i++) { + psm->ports[i].sel = ps2mult_controls[i]; + error = ps2mult_create_port(psm, i); + if (error) + goto err_out; + } + + psm->in_port = psm->out_port = &psm->ports[PS2MULT_KBD_PORT]; + + serio_set_drvdata(serio, psm); + error = serio_open(serio, drv); + if (error) + goto err_out; + + ps2mult_reset(psm); + + for (i = 0; i < PS2MULT_NUM_PORTS; i++) { + struct serio *s = psm->ports[i].serio; + + dev_info(&serio->dev, "%s port at %s\n", s->name, serio->phys); + serio_register_port(s); + } + + return 0; + +err_out: + while (--i >= 0) + kfree(psm->ports[i].serio); + kfree(psm); + return error; +} + +static void ps2mult_disconnect(struct serio *serio) +{ + struct ps2mult *psm = serio_get_drvdata(serio); + + /* Note that serio core already take care of children ports */ + serio_write(serio, PS2MULT_SESSION_END); + serio_close(serio); + kfree(psm); + + serio_set_drvdata(serio, NULL); +} + +static int ps2mult_reconnect(struct serio *serio) +{ + struct ps2mult *psm = serio_get_drvdata(serio); + + ps2mult_reset(psm); + + return 0; +} + +static irqreturn_t ps2mult_interrupt(struct serio *serio, + unsigned char data, unsigned int dfl) +{ + struct ps2mult *psm = serio_get_drvdata(serio); + struct ps2mult_port *in_port; + unsigned long flags; + + dev_dbg(&serio->dev, "Received %02x flags %02x\n", data, dfl); + + spin_lock_irqsave(&psm->lock, flags); + + if (psm->escape) { + psm->escape = false; + in_port = psm->in_port; + if (in_port->registered) + serio_interrupt(in_port->serio, data, dfl); + goto out; + } + + switch (data) { + case PS2MULT_ESCAPE: + dev_dbg(&serio->dev, "ESCAPE\n"); + psm->escape = true; + break; + + case PS2MULT_BSYNC: + dev_dbg(&serio->dev, "BSYNC\n"); + psm->in_port = psm->out_port; + break; + + case PS2MULT_SESSION_START: + dev_dbg(&serio->dev, "SS\n"); + break; + + case PS2MULT_SESSION_END: + dev_dbg(&serio->dev, "SE\n"); + break; + + case PS2MULT_KB_SELECTOR: + dev_dbg(&serio->dev, "KB\n"); + psm->in_port = &psm->ports[PS2MULT_KBD_PORT]; + break; + + case PS2MULT_MS_SELECTOR: + dev_dbg(&serio->dev, "MS\n"); + psm->in_port = &psm->ports[PS2MULT_MOUSE_PORT]; + break; + + default: + in_port = psm->in_port; + if (in_port->registered) + serio_interrupt(in_port->serio, data, dfl); + break; + } + + out: + spin_unlock_irqrestore(&psm->lock, flags); + return IRQ_HANDLED; +} + +static struct serio_driver ps2mult_drv = { + .driver = { + .name = "ps2mult", + }, + .description = "TQC PS/2 Multiplexer driver", + .id_table = ps2mult_serio_ids, + .interrupt = ps2mult_interrupt, + .connect = ps2mult_connect, + .disconnect = ps2mult_disconnect, + .reconnect = ps2mult_reconnect, +}; + +module_serio_driver(ps2mult_drv); diff --git a/drivers/input/serio/q40kbd.c b/drivers/input/serio/q40kbd.c new file mode 100644 index 000000000..ba04058fc --- /dev/null +++ b/drivers/input/serio/q40kbd.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2000-2001 Vojtech Pavlik + * + * Based on the work of: + * Richard Zidlicky <Richard.Zidlicky@stud.informatik.uni-erlangen.de> + */ + +/* + * Q40 PS/2 keyboard controller driver for Linux/m68k + */ + +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/bitops.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <asm/io.h> +#include <linux/uaccess.h> +#include <asm/q40_master.h> +#include <asm/irq.h> +#include <asm/q40ints.h> + +#define DRV_NAME "q40kbd" + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); + +struct q40kbd { + struct serio *port; + spinlock_t lock; +}; + +static irqreturn_t q40kbd_interrupt(int irq, void *dev_id) +{ + struct q40kbd *q40kbd = dev_id; + unsigned long flags; + + spin_lock_irqsave(&q40kbd->lock, flags); + + if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)) + serio_interrupt(q40kbd->port, master_inb(KEYCODE_REG), 0); + + master_outb(-1, KEYBOARD_UNLOCK_REG); + + spin_unlock_irqrestore(&q40kbd->lock, flags); + + return IRQ_HANDLED; +} + +/* + * q40kbd_flush() flushes all data that may be in the keyboard buffers + */ + +static void q40kbd_flush(struct q40kbd *q40kbd) +{ + int maxread = 100; + unsigned long flags; + + spin_lock_irqsave(&q40kbd->lock, flags); + + while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))) + master_inb(KEYCODE_REG); + + spin_unlock_irqrestore(&q40kbd->lock, flags); +} + +static void q40kbd_stop(void) +{ + master_outb(0, KEY_IRQ_ENABLE_REG); + master_outb(-1, KEYBOARD_UNLOCK_REG); +} + +/* + * q40kbd_open() is called when a port is open by the higher layer. + * It allocates the interrupt and enables in in the chip. + */ + +static int q40kbd_open(struct serio *port) +{ + struct q40kbd *q40kbd = port->port_data; + + q40kbd_flush(q40kbd); + + /* off we go */ + master_outb(-1, KEYBOARD_UNLOCK_REG); + master_outb(1, KEY_IRQ_ENABLE_REG); + + return 0; +} + +static void q40kbd_close(struct serio *port) +{ + struct q40kbd *q40kbd = port->port_data; + + q40kbd_stop(); + q40kbd_flush(q40kbd); +} + +static int q40kbd_probe(struct platform_device *pdev) +{ + struct q40kbd *q40kbd; + struct serio *port; + int error; + + q40kbd = kzalloc(sizeof(struct q40kbd), GFP_KERNEL); + port = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!q40kbd || !port) { + error = -ENOMEM; + goto err_free_mem; + } + + q40kbd->port = port; + spin_lock_init(&q40kbd->lock); + + port->id.type = SERIO_8042; + port->open = q40kbd_open; + port->close = q40kbd_close; + port->port_data = q40kbd; + port->dev.parent = &pdev->dev; + strscpy(port->name, "Q40 Kbd Port", sizeof(port->name)); + strscpy(port->phys, "Q40", sizeof(port->phys)); + + q40kbd_stop(); + + error = request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, + DRV_NAME, q40kbd); + if (error) { + dev_err(&pdev->dev, "Can't get irq %d.\n", Q40_IRQ_KEYBOARD); + goto err_free_mem; + } + + serio_register_port(q40kbd->port); + + platform_set_drvdata(pdev, q40kbd); + printk(KERN_INFO "serio: Q40 kbd registered\n"); + + return 0; + +err_free_mem: + kfree(port); + kfree(q40kbd); + return error; +} + +static int q40kbd_remove(struct platform_device *pdev) +{ + struct q40kbd *q40kbd = platform_get_drvdata(pdev); + + /* + * q40kbd_close() will be called as part of unregistering + * and will ensure that IRQ is turned off, so it is safe + * to unregister port first and free IRQ later. + */ + serio_unregister_port(q40kbd->port); + free_irq(Q40_IRQ_KEYBOARD, q40kbd); + kfree(q40kbd); + + return 0; +} + +static struct platform_driver q40kbd_driver = { + .driver = { + .name = "q40kbd", + }, + .remove = q40kbd_remove, +}; + +module_platform_driver_probe(q40kbd_driver, q40kbd_probe); diff --git a/drivers/input/serio/rpckbd.c b/drivers/input/serio/rpckbd.c new file mode 100644 index 000000000..ce420eb1f --- /dev/null +++ b/drivers/input/serio/rpckbd.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2000-2001 Vojtech Pavlik + * Copyright (c) 2002 Russell King + */ + +/* + * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/serio.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> + +#include <mach/hardware.h> +#include <asm/hardware/iomd.h> + +MODULE_AUTHOR("Vojtech Pavlik, Russell King"); +MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:kart"); + +struct rpckbd_data { + int tx_irq; + int rx_irq; +}; + +static int rpckbd_write(struct serio *port, unsigned char val) +{ + while (!(iomd_readb(IOMD_KCTRL) & (1 << 7))) + cpu_relax(); + + iomd_writeb(val, IOMD_KARTTX); + + return 0; +} + +static irqreturn_t rpckbd_rx(int irq, void *dev_id) +{ + struct serio *port = dev_id; + unsigned int byte; + int handled = IRQ_NONE; + + while (iomd_readb(IOMD_KCTRL) & (1 << 5)) { + byte = iomd_readb(IOMD_KARTRX); + + serio_interrupt(port, byte, 0); + handled = IRQ_HANDLED; + } + return handled; +} + +static irqreturn_t rpckbd_tx(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + +static int rpckbd_open(struct serio *port) +{ + struct rpckbd_data *rpckbd = port->port_data; + + /* Reset the keyboard state machine. */ + iomd_writeb(0, IOMD_KCTRL); + iomd_writeb(8, IOMD_KCTRL); + iomd_readb(IOMD_KARTRX); + + if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) { + printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n"); + return -EBUSY; + } + + if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) { + printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n"); + free_irq(rpckbd->rx_irq, port); + return -EBUSY; + } + + return 0; +} + +static void rpckbd_close(struct serio *port) +{ + struct rpckbd_data *rpckbd = port->port_data; + + free_irq(rpckbd->rx_irq, port); + free_irq(rpckbd->tx_irq, port); +} + +/* + * Allocate and initialize serio structure for subsequent registration + * with serio core. + */ +static int rpckbd_probe(struct platform_device *dev) +{ + struct rpckbd_data *rpckbd; + struct serio *serio; + int tx_irq, rx_irq; + + rx_irq = platform_get_irq(dev, 0); + if (rx_irq <= 0) + return rx_irq < 0 ? rx_irq : -ENXIO; + + tx_irq = platform_get_irq(dev, 1); + if (tx_irq <= 0) + return tx_irq < 0 ? tx_irq : -ENXIO; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL); + if (!serio || !rpckbd) { + kfree(rpckbd); + kfree(serio); + return -ENOMEM; + } + + rpckbd->rx_irq = rx_irq; + rpckbd->tx_irq = tx_irq; + + serio->id.type = SERIO_8042; + serio->write = rpckbd_write; + serio->open = rpckbd_open; + serio->close = rpckbd_close; + serio->dev.parent = &dev->dev; + serio->port_data = rpckbd; + strscpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name)); + strscpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys)); + + platform_set_drvdata(dev, serio); + serio_register_port(serio); + return 0; +} + +static int rpckbd_remove(struct platform_device *dev) +{ + struct serio *serio = platform_get_drvdata(dev); + struct rpckbd_data *rpckbd = serio->port_data; + + serio_unregister_port(serio); + kfree(rpckbd); + + return 0; +} + +static struct platform_driver rpckbd_driver = { + .probe = rpckbd_probe, + .remove = rpckbd_remove, + .driver = { + .name = "kart", + }, +}; +module_platform_driver(rpckbd_driver); diff --git a/drivers/input/serio/sa1111ps2.c b/drivers/input/serio/sa1111ps2.c new file mode 100644 index 000000000..2724c3aa5 --- /dev/null +++ b/drivers/input/serio/sa1111ps2.c @@ -0,0 +1,386 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/input/serio/sa1111ps2.c + * + * Copyright (C) 2002 Russell King + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <asm/io.h> + +#include <asm/hardware/sa1111.h> + +#define PS2CR 0x0000 +#define PS2STAT 0x0004 +#define PS2DATA 0x0008 +#define PS2CLKDIV 0x000c +#define PS2PRECNT 0x0010 + +#define PS2CR_ENA 0x08 +#define PS2CR_FKD 0x02 +#define PS2CR_FKC 0x01 + +#define PS2STAT_STP 0x0100 +#define PS2STAT_TXE 0x0080 +#define PS2STAT_TXB 0x0040 +#define PS2STAT_RXF 0x0020 +#define PS2STAT_RXB 0x0010 +#define PS2STAT_ENA 0x0008 +#define PS2STAT_RXP 0x0004 +#define PS2STAT_KBD 0x0002 +#define PS2STAT_KBC 0x0001 + +struct ps2if { + struct serio *io; + struct sa1111_dev *dev; + void __iomem *base; + int rx_irq; + int tx_irq; + unsigned int open; + spinlock_t lock; + unsigned int head; + unsigned int tail; + unsigned char buf[4]; +}; + +/* + * Read all bytes waiting in the PS2 port. There should be + * at the most one, but we loop for safety. If there was a + * framing error, we have to manually clear the status. + */ +static irqreturn_t ps2_rxint(int irq, void *dev_id) +{ + struct ps2if *ps2if = dev_id; + unsigned int scancode, flag, status; + + status = readl_relaxed(ps2if->base + PS2STAT); + while (status & PS2STAT_RXF) { + if (status & PS2STAT_STP) + writel_relaxed(PS2STAT_STP, ps2if->base + PS2STAT); + + flag = (status & PS2STAT_STP ? SERIO_FRAME : 0) | + (status & PS2STAT_RXP ? 0 : SERIO_PARITY); + + scancode = readl_relaxed(ps2if->base + PS2DATA) & 0xff; + + if (hweight8(scancode) & 1) + flag ^= SERIO_PARITY; + + serio_interrupt(ps2if->io, scancode, flag); + + status = readl_relaxed(ps2if->base + PS2STAT); + } + + return IRQ_HANDLED; +} + +/* + * Completion of ps2 write + */ +static irqreturn_t ps2_txint(int irq, void *dev_id) +{ + struct ps2if *ps2if = dev_id; + unsigned int status; + + spin_lock(&ps2if->lock); + status = readl_relaxed(ps2if->base + PS2STAT); + if (ps2if->head == ps2if->tail) { + disable_irq_nosync(irq); + /* done */ + } else if (status & PS2STAT_TXE) { + writel_relaxed(ps2if->buf[ps2if->tail], ps2if->base + PS2DATA); + ps2if->tail = (ps2if->tail + 1) & (sizeof(ps2if->buf) - 1); + } + spin_unlock(&ps2if->lock); + + return IRQ_HANDLED; +} + +/* + * Write a byte to the PS2 port. We have to wait for the + * port to indicate that the transmitter is empty. + */ +static int ps2_write(struct serio *io, unsigned char val) +{ + struct ps2if *ps2if = io->port_data; + unsigned long flags; + unsigned int head; + + spin_lock_irqsave(&ps2if->lock, flags); + + /* + * If the TX register is empty, we can go straight out. + */ + if (readl_relaxed(ps2if->base + PS2STAT) & PS2STAT_TXE) { + writel_relaxed(val, ps2if->base + PS2DATA); + } else { + if (ps2if->head == ps2if->tail) + enable_irq(ps2if->tx_irq); + head = (ps2if->head + 1) & (sizeof(ps2if->buf) - 1); + if (head != ps2if->tail) { + ps2if->buf[ps2if->head] = val; + ps2if->head = head; + } + } + + spin_unlock_irqrestore(&ps2if->lock, flags); + return 0; +} + +static int ps2_open(struct serio *io) +{ + struct ps2if *ps2if = io->port_data; + int ret; + + ret = sa1111_enable_device(ps2if->dev); + if (ret) + return ret; + + ret = request_irq(ps2if->rx_irq, ps2_rxint, 0, + SA1111_DRIVER_NAME(ps2if->dev), ps2if); + if (ret) { + printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n", + ps2if->rx_irq, ret); + sa1111_disable_device(ps2if->dev); + return ret; + } + + ret = request_irq(ps2if->tx_irq, ps2_txint, 0, + SA1111_DRIVER_NAME(ps2if->dev), ps2if); + if (ret) { + printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n", + ps2if->tx_irq, ret); + free_irq(ps2if->rx_irq, ps2if); + sa1111_disable_device(ps2if->dev); + return ret; + } + + ps2if->open = 1; + + enable_irq_wake(ps2if->rx_irq); + + writel_relaxed(PS2CR_ENA, ps2if->base + PS2CR); + return 0; +} + +static void ps2_close(struct serio *io) +{ + struct ps2if *ps2if = io->port_data; + + writel_relaxed(0, ps2if->base + PS2CR); + + disable_irq_wake(ps2if->rx_irq); + + ps2if->open = 0; + + free_irq(ps2if->tx_irq, ps2if); + free_irq(ps2if->rx_irq, ps2if); + + sa1111_disable_device(ps2if->dev); +} + +/* + * Clear the input buffer. + */ +static void ps2_clear_input(struct ps2if *ps2if) +{ + int maxread = 100; + + while (maxread--) { + if ((readl_relaxed(ps2if->base + PS2DATA) & 0xff) == 0xff) + break; + } +} + +static unsigned int ps2_test_one(struct ps2if *ps2if, + unsigned int mask) +{ + unsigned int val; + + writel_relaxed(PS2CR_ENA | mask, ps2if->base + PS2CR); + + udelay(10); + + val = readl_relaxed(ps2if->base + PS2STAT); + return val & (PS2STAT_KBC | PS2STAT_KBD); +} + +/* + * Test the keyboard interface. We basically check to make sure that + * we can drive each line to the keyboard independently of each other. + */ +static int ps2_test(struct ps2if *ps2if) +{ + unsigned int stat; + int ret = 0; + + stat = ps2_test_one(ps2if, PS2CR_FKC); + if (stat != PS2STAT_KBD) { + printk("PS/2 interface test failed[1]: %02x\n", stat); + ret = -ENODEV; + } + + stat = ps2_test_one(ps2if, 0); + if (stat != (PS2STAT_KBC | PS2STAT_KBD)) { + printk("PS/2 interface test failed[2]: %02x\n", stat); + ret = -ENODEV; + } + + stat = ps2_test_one(ps2if, PS2CR_FKD); + if (stat != PS2STAT_KBC) { + printk("PS/2 interface test failed[3]: %02x\n", stat); + ret = -ENODEV; + } + + writel_relaxed(0, ps2if->base + PS2CR); + + return ret; +} + +/* + * Add one device to this driver. + */ +static int ps2_probe(struct sa1111_dev *dev) +{ + struct ps2if *ps2if; + struct serio *serio; + int ret; + + ps2if = kzalloc(sizeof(struct ps2if), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!ps2if || !serio) { + ret = -ENOMEM; + goto free; + } + + serio->id.type = SERIO_8042; + serio->write = ps2_write; + serio->open = ps2_open; + serio->close = ps2_close; + strscpy(serio->name, dev_name(&dev->dev), sizeof(serio->name)); + strscpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys)); + serio->port_data = ps2if; + serio->dev.parent = &dev->dev; + ps2if->io = serio; + ps2if->dev = dev; + sa1111_set_drvdata(dev, ps2if); + + spin_lock_init(&ps2if->lock); + + ps2if->rx_irq = sa1111_get_irq(dev, 0); + if (ps2if->rx_irq <= 0) { + ret = ps2if->rx_irq ? : -ENXIO; + goto free; + } + + ps2if->tx_irq = sa1111_get_irq(dev, 1); + if (ps2if->tx_irq <= 0) { + ret = ps2if->tx_irq ? : -ENXIO; + goto free; + } + + /* + * Request the physical region for this PS2 port. + */ + if (!request_mem_region(dev->res.start, + dev->res.end - dev->res.start + 1, + SA1111_DRIVER_NAME(dev))) { + ret = -EBUSY; + goto free; + } + + /* + * Our parent device has already mapped the region. + */ + ps2if->base = dev->mapbase; + + sa1111_enable_device(ps2if->dev); + + /* Incoming clock is 8MHz */ + writel_relaxed(0, ps2if->base + PS2CLKDIV); + writel_relaxed(127, ps2if->base + PS2PRECNT); + + /* + * Flush any pending input. + */ + ps2_clear_input(ps2if); + + /* + * Test the keyboard interface. + */ + ret = ps2_test(ps2if); + if (ret) + goto out; + + /* + * Flush any pending input. + */ + ps2_clear_input(ps2if); + + sa1111_disable_device(ps2if->dev); + serio_register_port(ps2if->io); + return 0; + + out: + sa1111_disable_device(ps2if->dev); + release_mem_region(dev->res.start, resource_size(&dev->res)); + free: + sa1111_set_drvdata(dev, NULL); + kfree(ps2if); + kfree(serio); + return ret; +} + +/* + * Remove one device from this driver. + */ +static void ps2_remove(struct sa1111_dev *dev) +{ + struct ps2if *ps2if = sa1111_get_drvdata(dev); + + serio_unregister_port(ps2if->io); + release_mem_region(dev->res.start, resource_size(&dev->res)); + sa1111_set_drvdata(dev, NULL); + + kfree(ps2if); +} + +/* + * Our device driver structure + */ +static struct sa1111_driver ps2_driver = { + .drv = { + .name = "sa1111-ps2", + .owner = THIS_MODULE, + }, + .devid = SA1111_DEVID_PS2, + .probe = ps2_probe, + .remove = ps2_remove, +}; + +static int __init ps2_init(void) +{ + return sa1111_driver_register(&ps2_driver); +} + +static void __exit ps2_exit(void) +{ + sa1111_driver_unregister(&ps2_driver); +} + +module_init(ps2_init); +module_exit(ps2_exit); + +MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); +MODULE_DESCRIPTION("SA1111 PS2 controller driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c new file mode 100644 index 000000000..15ce32023 --- /dev/null +++ b/drivers/input/serio/serio.c @@ -0,0 +1,1049 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * The Serio abstraction module + * + * Copyright (c) 1999-2004 Vojtech Pavlik + * Copyright (c) 2004 Dmitry Torokhov + * Copyright (c) 2003 Daniele Bellucci + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/stddef.h> +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/mutex.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("Serio abstraction core"); +MODULE_LICENSE("GPL"); + +/* + * serio_mutex protects entire serio subsystem and is taken every time + * serio port or driver registered or unregistered. + */ +static DEFINE_MUTEX(serio_mutex); + +static LIST_HEAD(serio_list); + +static void serio_add_port(struct serio *serio); +static int serio_reconnect_port(struct serio *serio); +static void serio_disconnect_port(struct serio *serio); +static void serio_reconnect_subtree(struct serio *serio); +static void serio_attach_driver(struct serio_driver *drv); + +static int serio_connect_driver(struct serio *serio, struct serio_driver *drv) +{ + int retval; + + mutex_lock(&serio->drv_mutex); + retval = drv->connect(serio, drv); + mutex_unlock(&serio->drv_mutex); + + return retval; +} + +static int serio_reconnect_driver(struct serio *serio) +{ + int retval = -1; + + mutex_lock(&serio->drv_mutex); + if (serio->drv && serio->drv->reconnect) + retval = serio->drv->reconnect(serio); + mutex_unlock(&serio->drv_mutex); + + return retval; +} + +static void serio_disconnect_driver(struct serio *serio) +{ + mutex_lock(&serio->drv_mutex); + if (serio->drv) + serio->drv->disconnect(serio); + mutex_unlock(&serio->drv_mutex); +} + +static int serio_match_port(const struct serio_device_id *ids, struct serio *serio) +{ + while (ids->type || ids->proto) { + if ((ids->type == SERIO_ANY || ids->type == serio->id.type) && + (ids->proto == SERIO_ANY || ids->proto == serio->id.proto) && + (ids->extra == SERIO_ANY || ids->extra == serio->id.extra) && + (ids->id == SERIO_ANY || ids->id == serio->id.id)) + return 1; + ids++; + } + return 0; +} + +/* + * Basic serio -> driver core mappings + */ + +static int serio_bind_driver(struct serio *serio, struct serio_driver *drv) +{ + int error; + + if (serio_match_port(drv->id_table, serio)) { + + serio->dev.driver = &drv->driver; + if (serio_connect_driver(serio, drv)) { + serio->dev.driver = NULL; + return -ENODEV; + } + + error = device_bind_driver(&serio->dev); + if (error) { + dev_warn(&serio->dev, + "device_bind_driver() failed for %s (%s) and %s, error: %d\n", + serio->phys, serio->name, + drv->description, error); + serio_disconnect_driver(serio); + serio->dev.driver = NULL; + return error; + } + } + return 0; +} + +static void serio_find_driver(struct serio *serio) +{ + int error; + + error = device_attach(&serio->dev); + if (error < 0 && error != -EPROBE_DEFER) + dev_warn(&serio->dev, + "device_attach() failed for %s (%s), error: %d\n", + serio->phys, serio->name, error); +} + + +/* + * Serio event processing. + */ + +enum serio_event_type { + SERIO_RESCAN_PORT, + SERIO_RECONNECT_PORT, + SERIO_RECONNECT_SUBTREE, + SERIO_REGISTER_PORT, + SERIO_ATTACH_DRIVER, +}; + +struct serio_event { + enum serio_event_type type; + void *object; + struct module *owner; + struct list_head node; +}; + +static DEFINE_SPINLOCK(serio_event_lock); /* protects serio_event_list */ +static LIST_HEAD(serio_event_list); + +static struct serio_event *serio_get_event(void) +{ + struct serio_event *event = NULL; + unsigned long flags; + + spin_lock_irqsave(&serio_event_lock, flags); + + if (!list_empty(&serio_event_list)) { + event = list_first_entry(&serio_event_list, + struct serio_event, node); + list_del_init(&event->node); + } + + spin_unlock_irqrestore(&serio_event_lock, flags); + return event; +} + +static void serio_free_event(struct serio_event *event) +{ + module_put(event->owner); + kfree(event); +} + +static void serio_remove_duplicate_events(void *object, + enum serio_event_type type) +{ + struct serio_event *e, *next; + unsigned long flags; + + spin_lock_irqsave(&serio_event_lock, flags); + + list_for_each_entry_safe(e, next, &serio_event_list, node) { + if (object == e->object) { + /* + * If this event is of different type we should not + * look further - we only suppress duplicate events + * that were sent back-to-back. + */ + if (type != e->type) + break; + + list_del_init(&e->node); + serio_free_event(e); + } + } + + spin_unlock_irqrestore(&serio_event_lock, flags); +} + +static void serio_handle_event(struct work_struct *work) +{ + struct serio_event *event; + + mutex_lock(&serio_mutex); + + while ((event = serio_get_event())) { + + switch (event->type) { + + case SERIO_REGISTER_PORT: + serio_add_port(event->object); + break; + + case SERIO_RECONNECT_PORT: + serio_reconnect_port(event->object); + break; + + case SERIO_RESCAN_PORT: + serio_disconnect_port(event->object); + serio_find_driver(event->object); + break; + + case SERIO_RECONNECT_SUBTREE: + serio_reconnect_subtree(event->object); + break; + + case SERIO_ATTACH_DRIVER: + serio_attach_driver(event->object); + break; + } + + serio_remove_duplicate_events(event->object, event->type); + serio_free_event(event); + } + + mutex_unlock(&serio_mutex); +} + +static DECLARE_WORK(serio_event_work, serio_handle_event); + +static int serio_queue_event(void *object, struct module *owner, + enum serio_event_type event_type) +{ + unsigned long flags; + struct serio_event *event; + int retval = 0; + + spin_lock_irqsave(&serio_event_lock, flags); + + /* + * Scan event list for the other events for the same serio port, + * starting with the most recent one. If event is the same we + * do not need add new one. If event is of different type we + * need to add this event and should not look further because + * we need to preseve sequence of distinct events. + */ + list_for_each_entry_reverse(event, &serio_event_list, node) { + if (event->object == object) { + if (event->type == event_type) + goto out; + break; + } + } + + event = kmalloc(sizeof(struct serio_event), GFP_ATOMIC); + if (!event) { + pr_err("Not enough memory to queue event %d\n", event_type); + retval = -ENOMEM; + goto out; + } + + if (!try_module_get(owner)) { + pr_warn("Can't get module reference, dropping event %d\n", + event_type); + kfree(event); + retval = -EINVAL; + goto out; + } + + event->type = event_type; + event->object = object; + event->owner = owner; + + list_add_tail(&event->node, &serio_event_list); + queue_work(system_long_wq, &serio_event_work); + +out: + spin_unlock_irqrestore(&serio_event_lock, flags); + return retval; +} + +/* + * Remove all events that have been submitted for a given + * object, be it serio port or driver. + */ +static void serio_remove_pending_events(void *object) +{ + struct serio_event *event, *next; + unsigned long flags; + + spin_lock_irqsave(&serio_event_lock, flags); + + list_for_each_entry_safe(event, next, &serio_event_list, node) { + if (event->object == object) { + list_del_init(&event->node); + serio_free_event(event); + } + } + + spin_unlock_irqrestore(&serio_event_lock, flags); +} + +/* + * Locate child serio port (if any) that has not been fully registered yet. + * + * Children are registered by driver's connect() handler so there can't be a + * grandchild pending registration together with a child. + */ +static struct serio *serio_get_pending_child(struct serio *parent) +{ + struct serio_event *event; + struct serio *serio, *child = NULL; + unsigned long flags; + + spin_lock_irqsave(&serio_event_lock, flags); + + list_for_each_entry(event, &serio_event_list, node) { + if (event->type == SERIO_REGISTER_PORT) { + serio = event->object; + if (serio->parent == parent) { + child = serio; + break; + } + } + } + + spin_unlock_irqrestore(&serio_event_lock, flags); + return child; +} + +/* + * Serio port operations + */ + +static ssize_t serio_show_description(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%s\n", serio->name); +} + +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + + return sprintf(buf, "serio:ty%02Xpr%02Xid%02Xex%02X\n", + serio->id.type, serio->id.proto, serio->id.id, serio->id.extra); +} + +static ssize_t type_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%02x\n", serio->id.type); +} + +static ssize_t proto_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%02x\n", serio->id.proto); +} + +static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%02x\n", serio->id.id); +} + +static ssize_t extra_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%02x\n", serio->id.extra); +} + +static ssize_t drvctl_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) +{ + struct serio *serio = to_serio_port(dev); + struct device_driver *drv; + int error; + + error = mutex_lock_interruptible(&serio_mutex); + if (error) + return error; + + if (!strncmp(buf, "none", count)) { + serio_disconnect_port(serio); + } else if (!strncmp(buf, "reconnect", count)) { + serio_reconnect_subtree(serio); + } else if (!strncmp(buf, "rescan", count)) { + serio_disconnect_port(serio); + serio_find_driver(serio); + serio_remove_duplicate_events(serio, SERIO_RESCAN_PORT); + } else if ((drv = driver_find(buf, &serio_bus)) != NULL) { + serio_disconnect_port(serio); + error = serio_bind_driver(serio, to_serio_driver(drv)); + serio_remove_duplicate_events(serio, SERIO_RESCAN_PORT); + } else { + error = -EINVAL; + } + + mutex_unlock(&serio_mutex); + + return error ? error : count; +} + +static ssize_t serio_show_bind_mode(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + return sprintf(buf, "%s\n", serio->manual_bind ? "manual" : "auto"); +} + +static ssize_t serio_set_bind_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) +{ + struct serio *serio = to_serio_port(dev); + int retval; + + retval = count; + if (!strncmp(buf, "manual", count)) { + serio->manual_bind = true; + } else if (!strncmp(buf, "auto", count)) { + serio->manual_bind = false; + } else { + retval = -EINVAL; + } + + return retval; +} + +static ssize_t firmware_id_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct serio *serio = to_serio_port(dev); + + return sprintf(buf, "%s\n", serio->firmware_id); +} + +static DEVICE_ATTR_RO(type); +static DEVICE_ATTR_RO(proto); +static DEVICE_ATTR_RO(id); +static DEVICE_ATTR_RO(extra); + +static struct attribute *serio_device_id_attrs[] = { + &dev_attr_type.attr, + &dev_attr_proto.attr, + &dev_attr_id.attr, + &dev_attr_extra.attr, + NULL +}; + +static const struct attribute_group serio_id_attr_group = { + .name = "id", + .attrs = serio_device_id_attrs, +}; + +static DEVICE_ATTR_RO(modalias); +static DEVICE_ATTR_WO(drvctl); +static DEVICE_ATTR(description, S_IRUGO, serio_show_description, NULL); +static DEVICE_ATTR(bind_mode, S_IWUSR | S_IRUGO, serio_show_bind_mode, serio_set_bind_mode); +static DEVICE_ATTR_RO(firmware_id); + +static struct attribute *serio_device_attrs[] = { + &dev_attr_modalias.attr, + &dev_attr_description.attr, + &dev_attr_drvctl.attr, + &dev_attr_bind_mode.attr, + &dev_attr_firmware_id.attr, + NULL +}; + +static const struct attribute_group serio_device_attr_group = { + .attrs = serio_device_attrs, +}; + +static const struct attribute_group *serio_device_attr_groups[] = { + &serio_id_attr_group, + &serio_device_attr_group, + NULL +}; + +static void serio_release_port(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + + kfree(serio); + module_put(THIS_MODULE); +} + +/* + * Prepare serio port for registration. + */ +static void serio_init_port(struct serio *serio) +{ + static atomic_t serio_no = ATOMIC_INIT(-1); + + __module_get(THIS_MODULE); + + INIT_LIST_HEAD(&serio->node); + INIT_LIST_HEAD(&serio->child_node); + INIT_LIST_HEAD(&serio->children); + spin_lock_init(&serio->lock); + mutex_init(&serio->drv_mutex); + device_initialize(&serio->dev); + dev_set_name(&serio->dev, "serio%lu", + (unsigned long)atomic_inc_return(&serio_no)); + serio->dev.bus = &serio_bus; + serio->dev.release = serio_release_port; + serio->dev.groups = serio_device_attr_groups; + if (serio->parent) { + serio->dev.parent = &serio->parent->dev; + serio->depth = serio->parent->depth + 1; + } else + serio->depth = 0; + lockdep_set_subclass(&serio->lock, serio->depth); +} + +/* + * Complete serio port registration. + * Driver core will attempt to find appropriate driver for the port. + */ +static void serio_add_port(struct serio *serio) +{ + struct serio *parent = serio->parent; + int error; + + if (parent) { + serio_pause_rx(parent); + list_add_tail(&serio->child_node, &parent->children); + serio_continue_rx(parent); + } + + list_add_tail(&serio->node, &serio_list); + + if (serio->start) + serio->start(serio); + + error = device_add(&serio->dev); + if (error) + dev_err(&serio->dev, + "device_add() failed for %s (%s), error: %d\n", + serio->phys, serio->name, error); +} + +/* + * serio_destroy_port() completes unregistration process and removes + * port from the system + */ +static void serio_destroy_port(struct serio *serio) +{ + struct serio *child; + + while ((child = serio_get_pending_child(serio)) != NULL) { + serio_remove_pending_events(child); + put_device(&child->dev); + } + + if (serio->stop) + serio->stop(serio); + + if (serio->parent) { + serio_pause_rx(serio->parent); + list_del_init(&serio->child_node); + serio_continue_rx(serio->parent); + serio->parent = NULL; + } + + if (device_is_registered(&serio->dev)) + device_del(&serio->dev); + + list_del_init(&serio->node); + serio_remove_pending_events(serio); + put_device(&serio->dev); +} + +/* + * Reconnect serio port (re-initialize attached device). + * If reconnect fails (old device is no longer attached or + * there was no device to begin with) we do full rescan in + * hope of finding a driver for the port. + */ +static int serio_reconnect_port(struct serio *serio) +{ + int error = serio_reconnect_driver(serio); + + if (error) { + serio_disconnect_port(serio); + serio_find_driver(serio); + } + + return error; +} + +/* + * Reconnect serio port and all its children (re-initialize attached + * devices). + */ +static void serio_reconnect_subtree(struct serio *root) +{ + struct serio *s = root; + int error; + + do { + error = serio_reconnect_port(s); + if (!error) { + /* + * Reconnect was successful, move on to do the + * first child. + */ + if (!list_empty(&s->children)) { + s = list_first_entry(&s->children, + struct serio, child_node); + continue; + } + } + + /* + * Either it was a leaf node or reconnect failed and it + * became a leaf node. Continue reconnecting starting with + * the next sibling of the parent node. + */ + while (s != root) { + struct serio *parent = s->parent; + + if (!list_is_last(&s->child_node, &parent->children)) { + s = list_entry(s->child_node.next, + struct serio, child_node); + break; + } + + s = parent; + } + } while (s != root); +} + +/* + * serio_disconnect_port() unbinds a port from its driver. As a side effect + * all children ports are unbound and destroyed. + */ +static void serio_disconnect_port(struct serio *serio) +{ + struct serio *s = serio; + + /* + * Children ports should be disconnected and destroyed + * first; we travel the tree in depth-first order. + */ + while (!list_empty(&serio->children)) { + + /* Locate a leaf */ + while (!list_empty(&s->children)) + s = list_first_entry(&s->children, + struct serio, child_node); + + /* + * Prune this leaf node unless it is the one we + * started with. + */ + if (s != serio) { + struct serio *parent = s->parent; + + device_release_driver(&s->dev); + serio_destroy_port(s); + + s = parent; + } + } + + /* + * OK, no children left, now disconnect this port. + */ + device_release_driver(&serio->dev); +} + +void serio_rescan(struct serio *serio) +{ + serio_queue_event(serio, NULL, SERIO_RESCAN_PORT); +} +EXPORT_SYMBOL(serio_rescan); + +void serio_reconnect(struct serio *serio) +{ + serio_queue_event(serio, NULL, SERIO_RECONNECT_SUBTREE); +} +EXPORT_SYMBOL(serio_reconnect); + +/* + * Submits register request to kseriod for subsequent execution. + * Note that port registration is always asynchronous. + */ +void __serio_register_port(struct serio *serio, struct module *owner) +{ + serio_init_port(serio); + serio_queue_event(serio, owner, SERIO_REGISTER_PORT); +} +EXPORT_SYMBOL(__serio_register_port); + +/* + * Synchronously unregisters serio port. + */ +void serio_unregister_port(struct serio *serio) +{ + mutex_lock(&serio_mutex); + serio_disconnect_port(serio); + serio_destroy_port(serio); + mutex_unlock(&serio_mutex); +} +EXPORT_SYMBOL(serio_unregister_port); + +/* + * Safely unregisters children ports if they are present. + */ +void serio_unregister_child_port(struct serio *serio) +{ + struct serio *s, *next; + + mutex_lock(&serio_mutex); + list_for_each_entry_safe(s, next, &serio->children, child_node) { + serio_disconnect_port(s); + serio_destroy_port(s); + } + mutex_unlock(&serio_mutex); +} +EXPORT_SYMBOL(serio_unregister_child_port); + + +/* + * Serio driver operations + */ + +static ssize_t description_show(struct device_driver *drv, char *buf) +{ + struct serio_driver *driver = to_serio_driver(drv); + return sprintf(buf, "%s\n", driver->description ? driver->description : "(none)"); +} +static DRIVER_ATTR_RO(description); + +static ssize_t bind_mode_show(struct device_driver *drv, char *buf) +{ + struct serio_driver *serio_drv = to_serio_driver(drv); + return sprintf(buf, "%s\n", serio_drv->manual_bind ? "manual" : "auto"); +} + +static ssize_t bind_mode_store(struct device_driver *drv, const char *buf, size_t count) +{ + struct serio_driver *serio_drv = to_serio_driver(drv); + int retval; + + retval = count; + if (!strncmp(buf, "manual", count)) { + serio_drv->manual_bind = true; + } else if (!strncmp(buf, "auto", count)) { + serio_drv->manual_bind = false; + } else { + retval = -EINVAL; + } + + return retval; +} +static DRIVER_ATTR_RW(bind_mode); + +static struct attribute *serio_driver_attrs[] = { + &driver_attr_description.attr, + &driver_attr_bind_mode.attr, + NULL, +}; +ATTRIBUTE_GROUPS(serio_driver); + +static int serio_driver_probe(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + struct serio_driver *drv = to_serio_driver(dev->driver); + + return serio_connect_driver(serio, drv); +} + +static void serio_driver_remove(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + + serio_disconnect_driver(serio); +} + +static void serio_cleanup(struct serio *serio) +{ + mutex_lock(&serio->drv_mutex); + if (serio->drv && serio->drv->cleanup) + serio->drv->cleanup(serio); + mutex_unlock(&serio->drv_mutex); +} + +static void serio_shutdown(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + + serio_cleanup(serio); +} + +static void serio_attach_driver(struct serio_driver *drv) +{ + int error; + + error = driver_attach(&drv->driver); + if (error) + pr_warn("driver_attach() failed for %s with error %d\n", + drv->driver.name, error); +} + +int __serio_register_driver(struct serio_driver *drv, struct module *owner, const char *mod_name) +{ + bool manual_bind = drv->manual_bind; + int error; + + drv->driver.bus = &serio_bus; + drv->driver.owner = owner; + drv->driver.mod_name = mod_name; + + /* + * Temporarily disable automatic binding because probing + * takes long time and we are better off doing it in kseriod + */ + drv->manual_bind = true; + + error = driver_register(&drv->driver); + if (error) { + pr_err("driver_register() failed for %s, error: %d\n", + drv->driver.name, error); + return error; + } + + /* + * Restore original bind mode and let kseriod bind the + * driver to free ports + */ + if (!manual_bind) { + drv->manual_bind = false; + error = serio_queue_event(drv, NULL, SERIO_ATTACH_DRIVER); + if (error) { + driver_unregister(&drv->driver); + return error; + } + } + + return 0; +} +EXPORT_SYMBOL(__serio_register_driver); + +void serio_unregister_driver(struct serio_driver *drv) +{ + struct serio *serio; + + mutex_lock(&serio_mutex); + + drv->manual_bind = true; /* so serio_find_driver ignores it */ + serio_remove_pending_events(drv); + +start_over: + list_for_each_entry(serio, &serio_list, node) { + if (serio->drv == drv) { + serio_disconnect_port(serio); + serio_find_driver(serio); + /* we could've deleted some ports, restart */ + goto start_over; + } + } + + driver_unregister(&drv->driver); + mutex_unlock(&serio_mutex); +} +EXPORT_SYMBOL(serio_unregister_driver); + +static void serio_set_drv(struct serio *serio, struct serio_driver *drv) +{ + serio_pause_rx(serio); + serio->drv = drv; + serio_continue_rx(serio); +} + +static int serio_bus_match(struct device *dev, struct device_driver *drv) +{ + struct serio *serio = to_serio_port(dev); + struct serio_driver *serio_drv = to_serio_driver(drv); + + if (serio->manual_bind || serio_drv->manual_bind) + return 0; + + return serio_match_port(serio_drv->id_table, serio); +} + +#define SERIO_ADD_UEVENT_VAR(fmt, val...) \ + do { \ + int err = add_uevent_var(env, fmt, val); \ + if (err) \ + return err; \ + } while (0) + +static int serio_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct serio *serio; + + if (!dev) + return -ENODEV; + + serio = to_serio_port(dev); + + SERIO_ADD_UEVENT_VAR("SERIO_TYPE=%02x", serio->id.type); + SERIO_ADD_UEVENT_VAR("SERIO_PROTO=%02x", serio->id.proto); + SERIO_ADD_UEVENT_VAR("SERIO_ID=%02x", serio->id.id); + SERIO_ADD_UEVENT_VAR("SERIO_EXTRA=%02x", serio->id.extra); + + SERIO_ADD_UEVENT_VAR("MODALIAS=serio:ty%02Xpr%02Xid%02Xex%02X", + serio->id.type, serio->id.proto, serio->id.id, serio->id.extra); + + if (serio->firmware_id[0]) + SERIO_ADD_UEVENT_VAR("SERIO_FIRMWARE_ID=%s", + serio->firmware_id); + + return 0; +} +#undef SERIO_ADD_UEVENT_VAR + +#ifdef CONFIG_PM +static int serio_suspend(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + + serio_cleanup(serio); + + return 0; +} + +static int serio_resume(struct device *dev) +{ + struct serio *serio = to_serio_port(dev); + int error = -ENOENT; + + mutex_lock(&serio->drv_mutex); + if (serio->drv && serio->drv->fast_reconnect) { + error = serio->drv->fast_reconnect(serio); + if (error && error != -ENOENT) + dev_warn(dev, "fast reconnect failed with error %d\n", + error); + } + mutex_unlock(&serio->drv_mutex); + + if (error) { + /* + * Driver reconnect can take a while, so better let + * kseriod deal with it. + */ + serio_queue_event(serio, NULL, SERIO_RECONNECT_PORT); + } + + return 0; +} + +static const struct dev_pm_ops serio_pm_ops = { + .suspend = serio_suspend, + .resume = serio_resume, + .poweroff = serio_suspend, + .restore = serio_resume, +}; +#endif /* CONFIG_PM */ + +/* called from serio_driver->connect/disconnect methods under serio_mutex */ +int serio_open(struct serio *serio, struct serio_driver *drv) +{ + serio_set_drv(serio, drv); + + if (serio->open && serio->open(serio)) { + serio_set_drv(serio, NULL); + return -1; + } + return 0; +} +EXPORT_SYMBOL(serio_open); + +/* called from serio_driver->connect/disconnect methods under serio_mutex */ +void serio_close(struct serio *serio) +{ + if (serio->close) + serio->close(serio); + + serio_set_drv(serio, NULL); +} +EXPORT_SYMBOL(serio_close); + +irqreturn_t serio_interrupt(struct serio *serio, + unsigned char data, unsigned int dfl) +{ + unsigned long flags; + irqreturn_t ret = IRQ_NONE; + + spin_lock_irqsave(&serio->lock, flags); + + if (likely(serio->drv)) { + ret = serio->drv->interrupt(serio, data, dfl); + } else if (!dfl && device_is_registered(&serio->dev)) { + serio_rescan(serio); + ret = IRQ_HANDLED; + } + + spin_unlock_irqrestore(&serio->lock, flags); + + return ret; +} +EXPORT_SYMBOL(serio_interrupt); + +struct bus_type serio_bus = { + .name = "serio", + .drv_groups = serio_driver_groups, + .match = serio_bus_match, + .uevent = serio_uevent, + .probe = serio_driver_probe, + .remove = serio_driver_remove, + .shutdown = serio_shutdown, +#ifdef CONFIG_PM + .pm = &serio_pm_ops, +#endif +}; +EXPORT_SYMBOL(serio_bus); + +static int __init serio_init(void) +{ + int error; + + error = bus_register(&serio_bus); + if (error) { + pr_err("Failed to register serio bus, error: %d\n", error); + return error; + } + + return 0; +} + +static void __exit serio_exit(void) +{ + bus_unregister(&serio_bus); + + /* + * There should not be any outstanding events but work may + * still be scheduled so simply cancel it. + */ + cancel_work_sync(&serio_event_work); +} + +subsys_initcall(serio_init); +module_exit(serio_exit); diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c new file mode 100644 index 000000000..1e4770094 --- /dev/null +++ b/drivers/input/serio/serio_raw.c @@ -0,0 +1,441 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Raw serio device providing access to a raw byte stream from underlying + * serio port. Closely emulates behavior of pre-2.6 /dev/psaux device + * + * Copyright (c) 2004 Dmitry Torokhov + */ + +#include <linux/kref.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/poll.h> +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/major.h> +#include <linux/device.h> +#include <linux/miscdevice.h> +#include <linux/wait.h> +#include <linux/mutex.h> + +#define DRIVER_DESC "Raw serio driver" + +MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +#define SERIO_RAW_QUEUE_LEN 64 +struct serio_raw { + unsigned char queue[SERIO_RAW_QUEUE_LEN]; + unsigned int tail, head; + + char name[16]; + struct kref kref; + struct serio *serio; + struct miscdevice dev; + wait_queue_head_t wait; + struct list_head client_list; + struct list_head node; + bool dead; +}; + +struct serio_raw_client { + struct fasync_struct *fasync; + struct serio_raw *serio_raw; + struct list_head node; +}; + +static DEFINE_MUTEX(serio_raw_mutex); +static LIST_HEAD(serio_raw_list); + +/********************************************************************* + * Interface with userspace (file operations) * + *********************************************************************/ + +static int serio_raw_fasync(int fd, struct file *file, int on) +{ + struct serio_raw_client *client = file->private_data; + + return fasync_helper(fd, file, on, &client->fasync); +} + +static struct serio_raw *serio_raw_locate(int minor) +{ + struct serio_raw *serio_raw; + + list_for_each_entry(serio_raw, &serio_raw_list, node) { + if (serio_raw->dev.minor == minor) + return serio_raw; + } + + return NULL; +} + +static int serio_raw_open(struct inode *inode, struct file *file) +{ + struct serio_raw *serio_raw; + struct serio_raw_client *client; + int retval; + + retval = mutex_lock_interruptible(&serio_raw_mutex); + if (retval) + return retval; + + serio_raw = serio_raw_locate(iminor(inode)); + if (!serio_raw) { + retval = -ENODEV; + goto out; + } + + if (serio_raw->dead) { + retval = -ENODEV; + goto out; + } + + client = kzalloc(sizeof(struct serio_raw_client), GFP_KERNEL); + if (!client) { + retval = -ENOMEM; + goto out; + } + + client->serio_raw = serio_raw; + file->private_data = client; + + kref_get(&serio_raw->kref); + + serio_pause_rx(serio_raw->serio); + list_add_tail(&client->node, &serio_raw->client_list); + serio_continue_rx(serio_raw->serio); + +out: + mutex_unlock(&serio_raw_mutex); + return retval; +} + +static void serio_raw_free(struct kref *kref) +{ + struct serio_raw *serio_raw = + container_of(kref, struct serio_raw, kref); + + put_device(&serio_raw->serio->dev); + kfree(serio_raw); +} + +static int serio_raw_release(struct inode *inode, struct file *file) +{ + struct serio_raw_client *client = file->private_data; + struct serio_raw *serio_raw = client->serio_raw; + + serio_pause_rx(serio_raw->serio); + list_del(&client->node); + serio_continue_rx(serio_raw->serio); + + kfree(client); + + kref_put(&serio_raw->kref, serio_raw_free); + + return 0; +} + +static bool serio_raw_fetch_byte(struct serio_raw *serio_raw, char *c) +{ + bool empty; + + serio_pause_rx(serio_raw->serio); + + empty = serio_raw->head == serio_raw->tail; + if (!empty) { + *c = serio_raw->queue[serio_raw->tail]; + serio_raw->tail = (serio_raw->tail + 1) % SERIO_RAW_QUEUE_LEN; + } + + serio_continue_rx(serio_raw->serio); + + return !empty; +} + +static ssize_t serio_raw_read(struct file *file, char __user *buffer, + size_t count, loff_t *ppos) +{ + struct serio_raw_client *client = file->private_data; + struct serio_raw *serio_raw = client->serio_raw; + char c; + ssize_t read = 0; + int error; + + for (;;) { + if (serio_raw->dead) + return -ENODEV; + + if (serio_raw->head == serio_raw->tail && + (file->f_flags & O_NONBLOCK)) + return -EAGAIN; + + if (count == 0) + break; + + while (read < count && serio_raw_fetch_byte(serio_raw, &c)) { + if (put_user(c, buffer++)) + return -EFAULT; + read++; + } + + if (read) + break; + + if (!(file->f_flags & O_NONBLOCK)) { + error = wait_event_interruptible(serio_raw->wait, + serio_raw->head != serio_raw->tail || + serio_raw->dead); + if (error) + return error; + } + } + + return read; +} + +static ssize_t serio_raw_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos) +{ + struct serio_raw_client *client = file->private_data; + struct serio_raw *serio_raw = client->serio_raw; + int retval = 0; + unsigned char c; + + retval = mutex_lock_interruptible(&serio_raw_mutex); + if (retval) + return retval; + + if (serio_raw->dead) { + retval = -ENODEV; + goto out; + } + + if (count > 32) + count = 32; + + while (count--) { + if (get_user(c, buffer++)) { + retval = -EFAULT; + goto out; + } + + if (serio_write(serio_raw->serio, c)) { + /* Either signal error or partial write */ + if (retval == 0) + retval = -EIO; + goto out; + } + + retval++; + } + +out: + mutex_unlock(&serio_raw_mutex); + return retval; +} + +static __poll_t serio_raw_poll(struct file *file, poll_table *wait) +{ + struct serio_raw_client *client = file->private_data; + struct serio_raw *serio_raw = client->serio_raw; + __poll_t mask; + + poll_wait(file, &serio_raw->wait, wait); + + mask = serio_raw->dead ? EPOLLHUP | EPOLLERR : EPOLLOUT | EPOLLWRNORM; + if (serio_raw->head != serio_raw->tail) + mask |= EPOLLIN | EPOLLRDNORM; + + return mask; +} + +static const struct file_operations serio_raw_fops = { + .owner = THIS_MODULE, + .open = serio_raw_open, + .release = serio_raw_release, + .read = serio_raw_read, + .write = serio_raw_write, + .poll = serio_raw_poll, + .fasync = serio_raw_fasync, + .llseek = noop_llseek, +}; + + +/********************************************************************* + * Interface with serio port * + *********************************************************************/ + +static irqreturn_t serio_raw_interrupt(struct serio *serio, unsigned char data, + unsigned int dfl) +{ + struct serio_raw *serio_raw = serio_get_drvdata(serio); + struct serio_raw_client *client; + unsigned int head = serio_raw->head; + + /* we are holding serio->lock here so we are protected */ + serio_raw->queue[head] = data; + head = (head + 1) % SERIO_RAW_QUEUE_LEN; + if (likely(head != serio_raw->tail)) { + serio_raw->head = head; + list_for_each_entry(client, &serio_raw->client_list, node) + kill_fasync(&client->fasync, SIGIO, POLL_IN); + wake_up_interruptible(&serio_raw->wait); + } + + return IRQ_HANDLED; +} + +static int serio_raw_connect(struct serio *serio, struct serio_driver *drv) +{ + static atomic_t serio_raw_no = ATOMIC_INIT(-1); + struct serio_raw *serio_raw; + int err; + + serio_raw = kzalloc(sizeof(struct serio_raw), GFP_KERNEL); + if (!serio_raw) { + dev_dbg(&serio->dev, "can't allocate memory for a device\n"); + return -ENOMEM; + } + + snprintf(serio_raw->name, sizeof(serio_raw->name), + "serio_raw%ld", (long)atomic_inc_return(&serio_raw_no)); + kref_init(&serio_raw->kref); + INIT_LIST_HEAD(&serio_raw->client_list); + init_waitqueue_head(&serio_raw->wait); + + serio_raw->serio = serio; + get_device(&serio->dev); + + serio_set_drvdata(serio, serio_raw); + + err = serio_open(serio, drv); + if (err) + goto err_free; + + err = mutex_lock_killable(&serio_raw_mutex); + if (err) + goto err_close; + + list_add_tail(&serio_raw->node, &serio_raw_list); + mutex_unlock(&serio_raw_mutex); + + serio_raw->dev.minor = PSMOUSE_MINOR; + serio_raw->dev.name = serio_raw->name; + serio_raw->dev.parent = &serio->dev; + serio_raw->dev.fops = &serio_raw_fops; + + err = misc_register(&serio_raw->dev); + if (err) { + serio_raw->dev.minor = MISC_DYNAMIC_MINOR; + err = misc_register(&serio_raw->dev); + } + + if (err) { + dev_err(&serio->dev, + "failed to register raw access device for %s\n", + serio->phys); + goto err_unlink; + } + + dev_info(&serio->dev, "raw access enabled on %s (%s, minor %d)\n", + serio->phys, serio_raw->name, serio_raw->dev.minor); + return 0; + +err_unlink: + list_del_init(&serio_raw->node); +err_close: + serio_close(serio); +err_free: + serio_set_drvdata(serio, NULL); + kref_put(&serio_raw->kref, serio_raw_free); + return err; +} + +static int serio_raw_reconnect(struct serio *serio) +{ + struct serio_raw *serio_raw = serio_get_drvdata(serio); + struct serio_driver *drv = serio->drv; + + if (!drv || !serio_raw) { + dev_dbg(&serio->dev, + "reconnect request, but serio is disconnected, ignoring...\n"); + return -1; + } + + /* + * Nothing needs to be done here, we just need this method to + * keep the same device. + */ + return 0; +} + +/* + * Wake up users waiting for IO so they can disconnect from + * dead device. + */ +static void serio_raw_hangup(struct serio_raw *serio_raw) +{ + struct serio_raw_client *client; + + serio_pause_rx(serio_raw->serio); + list_for_each_entry(client, &serio_raw->client_list, node) + kill_fasync(&client->fasync, SIGIO, POLL_HUP); + serio_continue_rx(serio_raw->serio); + + wake_up_interruptible(&serio_raw->wait); +} + + +static void serio_raw_disconnect(struct serio *serio) +{ + struct serio_raw *serio_raw = serio_get_drvdata(serio); + + misc_deregister(&serio_raw->dev); + + mutex_lock(&serio_raw_mutex); + serio_raw->dead = true; + list_del_init(&serio_raw->node); + mutex_unlock(&serio_raw_mutex); + + serio_raw_hangup(serio_raw); + + serio_close(serio); + kref_put(&serio_raw->kref, serio_raw_free); + + serio_set_drvdata(serio, NULL); +} + +static const struct serio_device_id serio_raw_serio_ids[] = { + { + .type = SERIO_8042, + .proto = SERIO_ANY, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { + .type = SERIO_8042_XL, + .proto = SERIO_ANY, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(serio, serio_raw_serio_ids); + +static struct serio_driver serio_raw_drv = { + .driver = { + .name = "serio_raw", + }, + .description = DRIVER_DESC, + .id_table = serio_raw_serio_ids, + .interrupt = serio_raw_interrupt, + .connect = serio_raw_connect, + .reconnect = serio_raw_reconnect, + .disconnect = serio_raw_disconnect, + .manual_bind = true, +}; + +module_serio_driver(serio_raw_drv); diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c new file mode 100644 index 000000000..7f7ef0e3a --- /dev/null +++ b/drivers/input/serio/serport.c @@ -0,0 +1,309 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Input device TTY line discipline + * + * Copyright (c) 1999-2002 Vojtech Pavlik + * + * This is a module that converts a tty line into a much simpler + * 'serial io port' abstraction that the input device drivers use. + */ + + +#include <linux/uaccess.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/serio.h> +#include <linux/tty.h> +#include <linux/compat.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("Input device TTY line discipline"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_LDISC(N_MOUSE); + +#define SERPORT_BUSY 1 +#define SERPORT_ACTIVE 2 +#define SERPORT_DEAD 3 + +struct serport { + struct tty_struct *tty; + wait_queue_head_t wait; + struct serio *serio; + struct serio_device_id id; + spinlock_t lock; + unsigned long flags; +}; + +/* + * Callback functions from the serio code. + */ + +static int serport_serio_write(struct serio *serio, unsigned char data) +{ + struct serport *serport = serio->port_data; + return -(serport->tty->ops->write(serport->tty, &data, 1) != 1); +} + +static int serport_serio_open(struct serio *serio) +{ + struct serport *serport = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&serport->lock, flags); + set_bit(SERPORT_ACTIVE, &serport->flags); + spin_unlock_irqrestore(&serport->lock, flags); + + return 0; +} + + +static void serport_serio_close(struct serio *serio) +{ + struct serport *serport = serio->port_data; + unsigned long flags; + + spin_lock_irqsave(&serport->lock, flags); + clear_bit(SERPORT_ACTIVE, &serport->flags); + spin_unlock_irqrestore(&serport->lock, flags); +} + +/* + * serport_ldisc_open() is the routine that is called upon setting our line + * discipline on a tty. It prepares the serio struct. + */ + +static int serport_ldisc_open(struct tty_struct *tty) +{ + struct serport *serport; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + serport = kzalloc(sizeof(struct serport), GFP_KERNEL); + if (!serport) + return -ENOMEM; + + serport->tty = tty; + spin_lock_init(&serport->lock); + init_waitqueue_head(&serport->wait); + + tty->disc_data = serport; + tty->receive_room = 256; + set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + + return 0; +} + +/* + * serport_ldisc_close() is the opposite of serport_ldisc_open() + */ + +static void serport_ldisc_close(struct tty_struct *tty) +{ + struct serport *serport = (struct serport *) tty->disc_data; + + kfree(serport); +} + +/* + * serport_ldisc_receive() is called by the low level tty driver when characters + * are ready for us. We forward the characters and flags, one by one to the + * 'interrupt' routine. + */ + +static void serport_ldisc_receive(struct tty_struct *tty, + const unsigned char *cp, const char *fp, int count) +{ + struct serport *serport = (struct serport*) tty->disc_data; + unsigned long flags; + unsigned int ch_flags = 0; + int i; + + spin_lock_irqsave(&serport->lock, flags); + + if (!test_bit(SERPORT_ACTIVE, &serport->flags)) + goto out; + + for (i = 0; i < count; i++) { + if (fp) { + switch (fp[i]) { + case TTY_FRAME: + ch_flags = SERIO_FRAME; + break; + + case TTY_PARITY: + ch_flags = SERIO_PARITY; + break; + + default: + ch_flags = 0; + break; + } + } + + serio_interrupt(serport->serio, cp[i], ch_flags); + } + +out: + spin_unlock_irqrestore(&serport->lock, flags); +} + +/* + * serport_ldisc_read() just waits indefinitely if everything goes well. + * However, when the serio driver closes the serio port, it finishes, + * returning 0 characters. + */ + +static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file, + unsigned char *kbuf, size_t nr, + void **cookie, unsigned long offset) +{ + struct serport *serport = (struct serport*) tty->disc_data; + struct serio *serio; + + if (test_and_set_bit(SERPORT_BUSY, &serport->flags)) + return -EBUSY; + + serport->serio = serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + strscpy(serio->name, "Serial port", sizeof(serio->name)); + snprintf(serio->phys, sizeof(serio->phys), "%s/serio0", tty_name(tty)); + serio->id = serport->id; + serio->id.type = SERIO_RS232; + serio->write = serport_serio_write; + serio->open = serport_serio_open; + serio->close = serport_serio_close; + serio->port_data = serport; + serio->dev.parent = tty->dev; + + serio_register_port(serport->serio); + printk(KERN_INFO "serio: Serial port %s\n", tty_name(tty)); + + wait_event_interruptible(serport->wait, test_bit(SERPORT_DEAD, &serport->flags)); + serio_unregister_port(serport->serio); + serport->serio = NULL; + + clear_bit(SERPORT_DEAD, &serport->flags); + clear_bit(SERPORT_BUSY, &serport->flags); + + return 0; +} + +static void serport_set_type(struct tty_struct *tty, unsigned long type) +{ + struct serport *serport = tty->disc_data; + + serport->id.proto = type & 0x000000ff; + serport->id.id = (type & 0x0000ff00) >> 8; + serport->id.extra = (type & 0x00ff0000) >> 16; +} + +/* + * serport_ldisc_ioctl() allows to set the port protocol, and device ID + */ + +static int serport_ldisc_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg) +{ + if (cmd == SPIOCSTYPE) { + unsigned long type; + + if (get_user(type, (unsigned long __user *) arg)) + return -EFAULT; + + serport_set_type(tty, type); + return 0; + } + + return -EINVAL; +} + +#ifdef CONFIG_COMPAT +#define COMPAT_SPIOCSTYPE _IOW('q', 0x01, compat_ulong_t) +static int serport_ldisc_compat_ioctl(struct tty_struct *tty, + unsigned int cmd, unsigned long arg) +{ + if (cmd == COMPAT_SPIOCSTYPE) { + void __user *uarg = compat_ptr(arg); + compat_ulong_t compat_type; + + if (get_user(compat_type, (compat_ulong_t __user *)uarg)) + return -EFAULT; + + serport_set_type(tty, compat_type); + return 0; + } + + return -EINVAL; +} +#endif + +static void serport_ldisc_hangup(struct tty_struct *tty) +{ + struct serport *serport = (struct serport *) tty->disc_data; + unsigned long flags; + + spin_lock_irqsave(&serport->lock, flags); + set_bit(SERPORT_DEAD, &serport->flags); + spin_unlock_irqrestore(&serport->lock, flags); + + wake_up_interruptible(&serport->wait); +} + +static void serport_ldisc_write_wakeup(struct tty_struct * tty) +{ + struct serport *serport = (struct serport *) tty->disc_data; + unsigned long flags; + + spin_lock_irqsave(&serport->lock, flags); + if (test_bit(SERPORT_ACTIVE, &serport->flags)) + serio_drv_write_wakeup(serport->serio); + spin_unlock_irqrestore(&serport->lock, flags); +} + +/* + * The line discipline structure. + */ + +static struct tty_ldisc_ops serport_ldisc = { + .owner = THIS_MODULE, + .num = N_MOUSE, + .name = "input", + .open = serport_ldisc_open, + .close = serport_ldisc_close, + .read = serport_ldisc_read, + .ioctl = serport_ldisc_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = serport_ldisc_compat_ioctl, +#endif + .receive_buf = serport_ldisc_receive, + .hangup = serport_ldisc_hangup, + .write_wakeup = serport_ldisc_write_wakeup +}; + +/* + * The functions for insering/removing us as a module. + */ + +static int __init serport_init(void) +{ + int retval; + retval = tty_register_ldisc(&serport_ldisc); + if (retval) + printk(KERN_ERR "serport.c: Error registering line discipline.\n"); + + return retval; +} + +static void __exit serport_exit(void) +{ + tty_unregister_ldisc(&serport_ldisc); +} + +module_init(serport_init); +module_exit(serport_exit); diff --git a/drivers/input/serio/sun4i-ps2.c b/drivers/input/serio/sun4i-ps2.c new file mode 100644 index 000000000..eb2626401 --- /dev/null +++ b/drivers/input/serio/sun4i-ps2.c @@ -0,0 +1,338 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for Allwinner A10 PS2 host controller + * + * Author: Vishnu Patekar <vishnupatekar0510@gmail.com> + * Aaron.maoye <leafy.myeh@newbietech.com> + */ + +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> + +#define DRIVER_NAME "sun4i-ps2" + +/* register offset definitions */ +#define PS2_REG_GCTL 0x00 /* PS2 Module Global Control Reg */ +#define PS2_REG_DATA 0x04 /* PS2 Module Data Reg */ +#define PS2_REG_LCTL 0x08 /* PS2 Module Line Control Reg */ +#define PS2_REG_LSTS 0x0C /* PS2 Module Line Status Reg */ +#define PS2_REG_FCTL 0x10 /* PS2 Module FIFO Control Reg */ +#define PS2_REG_FSTS 0x14 /* PS2 Module FIFO Status Reg */ +#define PS2_REG_CLKDR 0x18 /* PS2 Module Clock Divider Reg*/ + +/* PS2 GLOBAL CONTROL REGISTER PS2_GCTL */ +#define PS2_GCTL_INTFLAG BIT(4) +#define PS2_GCTL_INTEN BIT(3) +#define PS2_GCTL_RESET BIT(2) +#define PS2_GCTL_MASTER BIT(1) +#define PS2_GCTL_BUSEN BIT(0) + +/* PS2 LINE CONTROL REGISTER */ +#define PS2_LCTL_NOACK BIT(18) +#define PS2_LCTL_TXDTOEN BIT(8) +#define PS2_LCTL_STOPERREN BIT(3) +#define PS2_LCTL_ACKERREN BIT(2) +#define PS2_LCTL_PARERREN BIT(1) +#define PS2_LCTL_RXDTOEN BIT(0) + +/* PS2 LINE STATUS REGISTER */ +#define PS2_LSTS_TXTDO BIT(8) +#define PS2_LSTS_STOPERR BIT(3) +#define PS2_LSTS_ACKERR BIT(2) +#define PS2_LSTS_PARERR BIT(1) +#define PS2_LSTS_RXTDO BIT(0) + +#define PS2_LINE_ERROR_BIT \ + (PS2_LSTS_TXTDO | PS2_LSTS_STOPERR | PS2_LSTS_ACKERR | \ + PS2_LSTS_PARERR | PS2_LSTS_RXTDO) + +/* PS2 FIFO CONTROL REGISTER */ +#define PS2_FCTL_TXRST BIT(17) +#define PS2_FCTL_RXRST BIT(16) +#define PS2_FCTL_TXUFIEN BIT(10) +#define PS2_FCTL_TXOFIEN BIT(9) +#define PS2_FCTL_TXRDYIEN BIT(8) +#define PS2_FCTL_RXUFIEN BIT(2) +#define PS2_FCTL_RXOFIEN BIT(1) +#define PS2_FCTL_RXRDYIEN BIT(0) + +/* PS2 FIFO STATUS REGISTER */ +#define PS2_FSTS_TXUF BIT(10) +#define PS2_FSTS_TXOF BIT(9) +#define PS2_FSTS_TXRDY BIT(8) +#define PS2_FSTS_RXUF BIT(2) +#define PS2_FSTS_RXOF BIT(1) +#define PS2_FSTS_RXRDY BIT(0) + +#define PS2_FIFO_ERROR_BIT \ + (PS2_FSTS_TXUF | PS2_FSTS_TXOF | PS2_FSTS_RXUF | PS2_FSTS_RXOF) + +#define PS2_SAMPLE_CLK 1000000 +#define PS2_SCLK 125000 + +struct sun4i_ps2data { + struct serio *serio; + struct device *dev; + + /* IO mapping base */ + void __iomem *reg_base; + + /* clock management */ + struct clk *clk; + + /* irq */ + spinlock_t lock; + int irq; +}; + +static irqreturn_t sun4i_ps2_interrupt(int irq, void *dev_id) +{ + struct sun4i_ps2data *drvdata = dev_id; + u32 intr_status; + u32 fifo_status; + unsigned char byte; + unsigned int rxflags = 0; + u32 rval; + + spin_lock(&drvdata->lock); + + /* Get the PS/2 interrupts and clear them */ + intr_status = readl(drvdata->reg_base + PS2_REG_LSTS); + fifo_status = readl(drvdata->reg_base + PS2_REG_FSTS); + + /* Check line status register */ + if (intr_status & PS2_LINE_ERROR_BIT) { + rxflags = (intr_status & PS2_LINE_ERROR_BIT) ? SERIO_FRAME : 0; + rxflags |= (intr_status & PS2_LSTS_PARERR) ? SERIO_PARITY : 0; + rxflags |= (intr_status & PS2_LSTS_PARERR) ? SERIO_TIMEOUT : 0; + + rval = PS2_LSTS_TXTDO | PS2_LSTS_STOPERR | PS2_LSTS_ACKERR | + PS2_LSTS_PARERR | PS2_LSTS_RXTDO; + writel(rval, drvdata->reg_base + PS2_REG_LSTS); + } + + /* Check FIFO status register */ + if (fifo_status & PS2_FIFO_ERROR_BIT) { + rval = PS2_FSTS_TXUF | PS2_FSTS_TXOF | PS2_FSTS_TXRDY | + PS2_FSTS_RXUF | PS2_FSTS_RXOF | PS2_FSTS_RXRDY; + writel(rval, drvdata->reg_base + PS2_REG_FSTS); + } + + rval = (fifo_status >> 16) & 0x3; + while (rval--) { + byte = readl(drvdata->reg_base + PS2_REG_DATA) & 0xff; + serio_interrupt(drvdata->serio, byte, rxflags); + } + + writel(intr_status, drvdata->reg_base + PS2_REG_LSTS); + writel(fifo_status, drvdata->reg_base + PS2_REG_FSTS); + + spin_unlock(&drvdata->lock); + + return IRQ_HANDLED; +} + +static int sun4i_ps2_open(struct serio *serio) +{ + struct sun4i_ps2data *drvdata = serio->port_data; + u32 src_clk = 0; + u32 clk_scdf; + u32 clk_pcdf; + u32 rval; + unsigned long flags; + + /* Set line control and enable interrupt */ + rval = PS2_LCTL_STOPERREN | PS2_LCTL_ACKERREN + | PS2_LCTL_PARERREN | PS2_LCTL_RXDTOEN; + writel(rval, drvdata->reg_base + PS2_REG_LCTL); + + /* Reset FIFO */ + rval = PS2_FCTL_TXRST | PS2_FCTL_RXRST | PS2_FCTL_TXUFIEN + | PS2_FCTL_TXOFIEN | PS2_FCTL_RXUFIEN + | PS2_FCTL_RXOFIEN | PS2_FCTL_RXRDYIEN; + + writel(rval, drvdata->reg_base + PS2_REG_FCTL); + + src_clk = clk_get_rate(drvdata->clk); + /* Set clock divider register */ + clk_scdf = src_clk / PS2_SAMPLE_CLK - 1; + clk_pcdf = PS2_SAMPLE_CLK / PS2_SCLK - 1; + rval = (clk_scdf << 8) | clk_pcdf; + writel(rval, drvdata->reg_base + PS2_REG_CLKDR); + + /* Set global control register */ + rval = PS2_GCTL_RESET | PS2_GCTL_INTEN | PS2_GCTL_MASTER + | PS2_GCTL_BUSEN; + + spin_lock_irqsave(&drvdata->lock, flags); + writel(rval, drvdata->reg_base + PS2_REG_GCTL); + spin_unlock_irqrestore(&drvdata->lock, flags); + + return 0; +} + +static void sun4i_ps2_close(struct serio *serio) +{ + struct sun4i_ps2data *drvdata = serio->port_data; + u32 rval; + + /* Shut off the interrupt */ + rval = readl(drvdata->reg_base + PS2_REG_GCTL); + writel(rval & ~(PS2_GCTL_INTEN), drvdata->reg_base + PS2_REG_GCTL); + + synchronize_irq(drvdata->irq); +} + +static int sun4i_ps2_write(struct serio *serio, unsigned char val) +{ + unsigned long expire = jiffies + msecs_to_jiffies(10000); + struct sun4i_ps2data *drvdata = serio->port_data; + + do { + if (readl(drvdata->reg_base + PS2_REG_FSTS) & PS2_FSTS_TXRDY) { + writel(val, drvdata->reg_base + PS2_REG_DATA); + return 0; + } + } while (time_before(jiffies, expire)); + + return SERIO_TIMEOUT; +} + +static int sun4i_ps2_probe(struct platform_device *pdev) +{ + struct resource *res; /* IO mem resources */ + struct sun4i_ps2data *drvdata; + struct serio *serio; + struct device *dev = &pdev->dev; + int error; + + drvdata = kzalloc(sizeof(struct sun4i_ps2data), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!drvdata || !serio) { + error = -ENOMEM; + goto err_free_mem; + } + + spin_lock_init(&drvdata->lock); + + /* IO */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "failed to locate registers\n"); + error = -ENXIO; + goto err_free_mem; + } + + drvdata->reg_base = ioremap(res->start, resource_size(res)); + if (!drvdata->reg_base) { + dev_err(dev, "failed to map registers\n"); + error = -ENOMEM; + goto err_free_mem; + } + + drvdata->clk = clk_get(dev, NULL); + if (IS_ERR(drvdata->clk)) { + error = PTR_ERR(drvdata->clk); + dev_err(dev, "couldn't get clock %d\n", error); + goto err_ioremap; + } + + error = clk_prepare_enable(drvdata->clk); + if (error) { + dev_err(dev, "failed to enable clock %d\n", error); + goto err_clk; + } + + serio->id.type = SERIO_8042; + serio->write = sun4i_ps2_write; + serio->open = sun4i_ps2_open; + serio->close = sun4i_ps2_close; + serio->port_data = drvdata; + serio->dev.parent = dev; + strscpy(serio->name, dev_name(dev), sizeof(serio->name)); + strscpy(serio->phys, dev_name(dev), sizeof(serio->phys)); + + /* shutoff interrupt */ + writel(0, drvdata->reg_base + PS2_REG_GCTL); + + /* Get IRQ for the device */ + drvdata->irq = platform_get_irq(pdev, 0); + if (drvdata->irq < 0) { + error = drvdata->irq; + goto err_disable_clk; + } + + drvdata->serio = serio; + drvdata->dev = dev; + + error = request_irq(drvdata->irq, sun4i_ps2_interrupt, 0, + DRIVER_NAME, drvdata); + if (error) { + dev_err(drvdata->dev, "failed to allocate interrupt %d: %d\n", + drvdata->irq, error); + goto err_disable_clk; + } + + serio_register_port(serio); + platform_set_drvdata(pdev, drvdata); + + return 0; /* success */ + +err_disable_clk: + clk_disable_unprepare(drvdata->clk); +err_clk: + clk_put(drvdata->clk); +err_ioremap: + iounmap(drvdata->reg_base); +err_free_mem: + kfree(serio); + kfree(drvdata); + return error; +} + +static int sun4i_ps2_remove(struct platform_device *pdev) +{ + struct sun4i_ps2data *drvdata = platform_get_drvdata(pdev); + + serio_unregister_port(drvdata->serio); + + free_irq(drvdata->irq, drvdata); + + clk_disable_unprepare(drvdata->clk); + clk_put(drvdata->clk); + + iounmap(drvdata->reg_base); + + kfree(drvdata); + + return 0; +} + +static const struct of_device_id sun4i_ps2_match[] = { + { .compatible = "allwinner,sun4i-a10-ps2", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, sun4i_ps2_match); + +static struct platform_driver sun4i_ps2_driver = { + .probe = sun4i_ps2_probe, + .remove = sun4i_ps2_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = sun4i_ps2_match, + }, +}; +module_platform_driver(sun4i_ps2_driver); + +MODULE_AUTHOR("Vishnu Patekar <vishnupatekar0510@gmail.com>"); +MODULE_AUTHOR("Aaron.maoye <leafy.myeh@newbietech.com>"); +MODULE_DESCRIPTION("Allwinner A10/Sun4i PS/2 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/input/serio/userio.c b/drivers/input/serio/userio.c new file mode 100644 index 000000000..9ab5c45c3 --- /dev/null +++ b/drivers/input/serio/userio.c @@ -0,0 +1,285 @@ +/* + * userio kernel serio device emulation module + * Copyright (C) 2015 Red Hat + * Copyright (C) 2015 Stephen Chandler Paul <thatslyude@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser + * General Public License for more details. + */ + +#include <linux/circ_buf.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/serio.h> +#include <linux/slab.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> +#include <linux/sched.h> +#include <linux/poll.h> +#include <uapi/linux/userio.h> + +#define USERIO_NAME "userio" +#define USERIO_BUFSIZE 16 + +static struct miscdevice userio_misc; + +struct userio_device { + struct serio *serio; + struct mutex mutex; + + bool running; + + u8 head; + u8 tail; + + spinlock_t buf_lock; + unsigned char buf[USERIO_BUFSIZE]; + + wait_queue_head_t waitq; +}; + +/** + * userio_device_write - Write data from serio to a userio device in userspace + * @id: The serio port for the userio device + * @val: The data to write to the device + */ +static int userio_device_write(struct serio *id, unsigned char val) +{ + struct userio_device *userio = id->port_data; + unsigned long flags; + + spin_lock_irqsave(&userio->buf_lock, flags); + + userio->buf[userio->head] = val; + userio->head = (userio->head + 1) % USERIO_BUFSIZE; + + if (userio->head == userio->tail) + dev_warn(userio_misc.this_device, + "Buffer overflowed, userio client isn't keeping up"); + + spin_unlock_irqrestore(&userio->buf_lock, flags); + + wake_up_interruptible(&userio->waitq); + + return 0; +} + +static int userio_char_open(struct inode *inode, struct file *file) +{ + struct userio_device *userio; + + userio = kzalloc(sizeof(struct userio_device), GFP_KERNEL); + if (!userio) + return -ENOMEM; + + mutex_init(&userio->mutex); + spin_lock_init(&userio->buf_lock); + init_waitqueue_head(&userio->waitq); + + userio->serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!userio->serio) { + kfree(userio); + return -ENOMEM; + } + + userio->serio->write = userio_device_write; + userio->serio->port_data = userio; + + file->private_data = userio; + + return 0; +} + +static int userio_char_release(struct inode *inode, struct file *file) +{ + struct userio_device *userio = file->private_data; + + if (userio->running) { + /* + * Don't free the serio port here, serio_unregister_port() + * does it for us. + */ + serio_unregister_port(userio->serio); + } else { + kfree(userio->serio); + } + + kfree(userio); + + return 0; +} + +static ssize_t userio_char_read(struct file *file, char __user *user_buffer, + size_t count, loff_t *ppos) +{ + struct userio_device *userio = file->private_data; + int error; + size_t nonwrap_len, copylen; + unsigned char buf[USERIO_BUFSIZE]; + unsigned long flags; + + /* + * By the time we get here, the data that was waiting might have + * been taken by another thread. Grab the buffer lock and check if + * there's still any data waiting, otherwise repeat this process + * until we have data (unless the file descriptor is non-blocking + * of course). + */ + for (;;) { + spin_lock_irqsave(&userio->buf_lock, flags); + + nonwrap_len = CIRC_CNT_TO_END(userio->head, + userio->tail, + USERIO_BUFSIZE); + copylen = min(nonwrap_len, count); + if (copylen) { + memcpy(buf, &userio->buf[userio->tail], copylen); + userio->tail = (userio->tail + copylen) % + USERIO_BUFSIZE; + } + + spin_unlock_irqrestore(&userio->buf_lock, flags); + + if (nonwrap_len) + break; + + /* buffer was/is empty */ + if (file->f_flags & O_NONBLOCK) + return -EAGAIN; + + /* + * count == 0 is special - no IO is done but we check + * for error conditions (see above). + */ + if (count == 0) + return 0; + + error = wait_event_interruptible(userio->waitq, + userio->head != userio->tail); + if (error) + return error; + } + + if (copylen) + if (copy_to_user(user_buffer, buf, copylen)) + return -EFAULT; + + return copylen; +} + +static ssize_t userio_char_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos) +{ + struct userio_device *userio = file->private_data; + struct userio_cmd cmd; + int error; + + if (count != sizeof(cmd)) { + dev_warn(userio_misc.this_device, "Invalid payload size\n"); + return -EINVAL; + } + + if (copy_from_user(&cmd, buffer, sizeof(cmd))) + return -EFAULT; + + error = mutex_lock_interruptible(&userio->mutex); + if (error) + return error; + + switch (cmd.type) { + case USERIO_CMD_REGISTER: + if (!userio->serio->id.type) { + dev_warn(userio_misc.this_device, + "No port type given on /dev/userio\n"); + + error = -EINVAL; + goto out; + } + + if (userio->running) { + dev_warn(userio_misc.this_device, + "Begin command sent, but we're already running\n"); + error = -EBUSY; + goto out; + } + + userio->running = true; + serio_register_port(userio->serio); + break; + + case USERIO_CMD_SET_PORT_TYPE: + if (userio->running) { + dev_warn(userio_misc.this_device, + "Can't change port type on an already running userio instance\n"); + error = -EBUSY; + goto out; + } + + userio->serio->id.type = cmd.data; + break; + + case USERIO_CMD_SEND_INTERRUPT: + if (!userio->running) { + dev_warn(userio_misc.this_device, + "The device must be registered before sending interrupts\n"); + error = -ENODEV; + goto out; + } + + serio_interrupt(userio->serio, cmd.data, 0); + break; + + default: + error = -EOPNOTSUPP; + goto out; + } + +out: + mutex_unlock(&userio->mutex); + return error ?: count; +} + +static __poll_t userio_char_poll(struct file *file, poll_table *wait) +{ + struct userio_device *userio = file->private_data; + + poll_wait(file, &userio->waitq, wait); + + if (userio->head != userio->tail) + return EPOLLIN | EPOLLRDNORM; + + return 0; +} + +static const struct file_operations userio_fops = { + .owner = THIS_MODULE, + .open = userio_char_open, + .release = userio_char_release, + .read = userio_char_read, + .write = userio_char_write, + .poll = userio_char_poll, + .llseek = no_llseek, +}; + +static struct miscdevice userio_misc = { + .fops = &userio_fops, + .minor = USERIO_MINOR, + .name = USERIO_NAME, +}; +module_driver(userio_misc, misc_register, misc_deregister); + +MODULE_ALIAS_MISCDEV(USERIO_MINOR); +MODULE_ALIAS("devname:" USERIO_NAME); + +MODULE_AUTHOR("Stephen Chandler Paul <thatslyude@gmail.com>"); +MODULE_DESCRIPTION("Virtual Serio Device Support"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/serio/xilinx_ps2.c b/drivers/input/serio/xilinx_ps2.c new file mode 100644 index 000000000..960d7601f --- /dev/null +++ b/drivers/input/serio/xilinx_ps2.c @@ -0,0 +1,371 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Xilinx XPS PS/2 device driver + * + * (c) 2005 MontaVista Software, Inc. + * (c) 2008 Xilinx, Inc. + */ + + +#include <linux/module.h> +#include <linux/serio.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> + +#define DRIVER_NAME "xilinx_ps2" + +/* Register offsets for the xps2 device */ +#define XPS2_SRST_OFFSET 0x00000000 /* Software Reset register */ +#define XPS2_STATUS_OFFSET 0x00000004 /* Status register */ +#define XPS2_RX_DATA_OFFSET 0x00000008 /* Receive Data register */ +#define XPS2_TX_DATA_OFFSET 0x0000000C /* Transmit Data register */ +#define XPS2_GIER_OFFSET 0x0000002C /* Global Interrupt Enable reg */ +#define XPS2_IPISR_OFFSET 0x00000030 /* Interrupt Status register */ +#define XPS2_IPIER_OFFSET 0x00000038 /* Interrupt Enable register */ + +/* Reset Register Bit Definitions */ +#define XPS2_SRST_RESET 0x0000000A /* Software Reset */ + +/* Status Register Bit Positions */ +#define XPS2_STATUS_RX_FULL 0x00000001 /* Receive Full */ +#define XPS2_STATUS_TX_FULL 0x00000002 /* Transmit Full */ + +/* + * Bit definitions for ISR/IER registers. Both the registers have the same bit + * definitions and are only defined once. + */ +#define XPS2_IPIXR_WDT_TOUT 0x00000001 /* Watchdog Timeout Interrupt */ +#define XPS2_IPIXR_TX_NOACK 0x00000002 /* Transmit No ACK Interrupt */ +#define XPS2_IPIXR_TX_ACK 0x00000004 /* Transmit ACK (Data) Interrupt */ +#define XPS2_IPIXR_RX_OVF 0x00000008 /* Receive Overflow Interrupt */ +#define XPS2_IPIXR_RX_ERR 0x00000010 /* Receive Error Interrupt */ +#define XPS2_IPIXR_RX_FULL 0x00000020 /* Receive Data Interrupt */ + +/* Mask for all the Transmit Interrupts */ +#define XPS2_IPIXR_TX_ALL (XPS2_IPIXR_TX_NOACK | XPS2_IPIXR_TX_ACK) + +/* Mask for all the Receive Interrupts */ +#define XPS2_IPIXR_RX_ALL (XPS2_IPIXR_RX_OVF | XPS2_IPIXR_RX_ERR | \ + XPS2_IPIXR_RX_FULL) + +/* Mask for all the Interrupts */ +#define XPS2_IPIXR_ALL (XPS2_IPIXR_TX_ALL | XPS2_IPIXR_RX_ALL | \ + XPS2_IPIXR_WDT_TOUT) + +/* Global Interrupt Enable mask */ +#define XPS2_GIER_GIE_MASK 0x80000000 + +struct xps2data { + int irq; + spinlock_t lock; + void __iomem *base_address; /* virt. address of control registers */ + unsigned int flags; + struct serio *serio; /* serio */ + struct device *dev; +}; + +/************************************/ +/* XPS PS/2 data transmission calls */ +/************************************/ + +/** + * xps2_recv() - attempts to receive a byte from the PS/2 port. + * @drvdata: pointer to ps2 device private data structure + * @byte: address where the read data will be copied + * + * If there is any data available in the PS/2 receiver, this functions reads + * the data, otherwise it returns error. + */ +static int xps2_recv(struct xps2data *drvdata, u8 *byte) +{ + u32 sr; + int status = -1; + + /* If there is data available in the PS/2 receiver, read it */ + sr = in_be32(drvdata->base_address + XPS2_STATUS_OFFSET); + if (sr & XPS2_STATUS_RX_FULL) { + *byte = in_be32(drvdata->base_address + XPS2_RX_DATA_OFFSET); + status = 0; + } + + return status; +} + +/*********************/ +/* Interrupt handler */ +/*********************/ +static irqreturn_t xps2_interrupt(int irq, void *dev_id) +{ + struct xps2data *drvdata = dev_id; + u32 intr_sr; + u8 c; + int status; + + /* Get the PS/2 interrupts and clear them */ + intr_sr = in_be32(drvdata->base_address + XPS2_IPISR_OFFSET); + out_be32(drvdata->base_address + XPS2_IPISR_OFFSET, intr_sr); + + /* Check which interrupt is active */ + if (intr_sr & XPS2_IPIXR_RX_OVF) + dev_warn(drvdata->dev, "receive overrun error\n"); + + if (intr_sr & XPS2_IPIXR_RX_ERR) + drvdata->flags |= SERIO_PARITY; + + if (intr_sr & (XPS2_IPIXR_TX_NOACK | XPS2_IPIXR_WDT_TOUT)) + drvdata->flags |= SERIO_TIMEOUT; + + if (intr_sr & XPS2_IPIXR_RX_FULL) { + status = xps2_recv(drvdata, &c); + + /* Error, if a byte is not received */ + if (status) { + dev_err(drvdata->dev, + "wrong rcvd byte count (%d)\n", status); + } else { + serio_interrupt(drvdata->serio, c, drvdata->flags); + drvdata->flags = 0; + } + } + + return IRQ_HANDLED; +} + +/*******************/ +/* serio callbacks */ +/*******************/ + +/** + * sxps2_write() - sends a byte out through the PS/2 port. + * @pserio: pointer to the serio structure of the PS/2 port + * @c: data that needs to be written to the PS/2 port + * + * This function checks if the PS/2 transmitter is empty and sends a byte. + * Otherwise it returns error. Transmission fails only when nothing is connected + * to the PS/2 port. Thats why, we do not try to resend the data in case of a + * failure. + */ +static int sxps2_write(struct serio *pserio, unsigned char c) +{ + struct xps2data *drvdata = pserio->port_data; + unsigned long flags; + u32 sr; + int status = -1; + + spin_lock_irqsave(&drvdata->lock, flags); + + /* If the PS/2 transmitter is empty send a byte of data */ + sr = in_be32(drvdata->base_address + XPS2_STATUS_OFFSET); + if (!(sr & XPS2_STATUS_TX_FULL)) { + out_be32(drvdata->base_address + XPS2_TX_DATA_OFFSET, c); + status = 0; + } + + spin_unlock_irqrestore(&drvdata->lock, flags); + + return status; +} + +/** + * sxps2_open() - called when a port is opened by the higher layer. + * @pserio: pointer to the serio structure of the PS/2 device + * + * This function requests irq and enables interrupts for the PS/2 device. + */ +static int sxps2_open(struct serio *pserio) +{ + struct xps2data *drvdata = pserio->port_data; + int error; + u8 c; + + error = request_irq(drvdata->irq, &xps2_interrupt, 0, + DRIVER_NAME, drvdata); + if (error) { + dev_err(drvdata->dev, + "Couldn't allocate interrupt %d\n", drvdata->irq); + return error; + } + + /* start reception by enabling the interrupts */ + out_be32(drvdata->base_address + XPS2_GIER_OFFSET, XPS2_GIER_GIE_MASK); + out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, XPS2_IPIXR_RX_ALL); + (void)xps2_recv(drvdata, &c); + + return 0; /* success */ +} + +/** + * sxps2_close() - frees the interrupt. + * @pserio: pointer to the serio structure of the PS/2 device + * + * This function frees the irq and disables interrupts for the PS/2 device. + */ +static void sxps2_close(struct serio *pserio) +{ + struct xps2data *drvdata = pserio->port_data; + + /* Disable the PS2 interrupts */ + out_be32(drvdata->base_address + XPS2_GIER_OFFSET, 0x00); + out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, 0x00); + free_irq(drvdata->irq, drvdata); +} + +/** + * xps2_of_probe - probe method for the PS/2 device. + * @of_dev: pointer to OF device structure + * @match: pointer to the structure used for matching a device + * + * This function probes the PS/2 device in the device tree. + * It initializes the driver data structure and the hardware. + * It returns 0, if the driver is bound to the PS/2 device, or a negative + * value if there is an error. + */ +static int xps2_of_probe(struct platform_device *ofdev) +{ + struct resource r_mem; /* IO mem resources */ + struct xps2data *drvdata; + struct serio *serio; + struct device *dev = &ofdev->dev; + resource_size_t remap_size, phys_addr; + unsigned int irq; + int error; + + dev_info(dev, "Device Tree Probing \'%pOFn\'\n", dev->of_node); + + /* Get iospace for the device */ + error = of_address_to_resource(dev->of_node, 0, &r_mem); + if (error) { + dev_err(dev, "invalid address\n"); + return error; + } + + /* Get IRQ for the device */ + irq = irq_of_parse_and_map(dev->of_node, 0); + if (!irq) { + dev_err(dev, "no IRQ found\n"); + return -ENODEV; + } + + drvdata = kzalloc(sizeof(struct xps2data), GFP_KERNEL); + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!drvdata || !serio) { + error = -ENOMEM; + goto failed1; + } + + spin_lock_init(&drvdata->lock); + drvdata->irq = irq; + drvdata->serio = serio; + drvdata->dev = dev; + + phys_addr = r_mem.start; + remap_size = resource_size(&r_mem); + if (!request_mem_region(phys_addr, remap_size, DRIVER_NAME)) { + dev_err(dev, "Couldn't lock memory region at 0x%08llX\n", + (unsigned long long)phys_addr); + error = -EBUSY; + goto failed1; + } + + /* Fill in configuration data and add them to the list */ + drvdata->base_address = ioremap(phys_addr, remap_size); + if (drvdata->base_address == NULL) { + dev_err(dev, "Couldn't ioremap memory at 0x%08llX\n", + (unsigned long long)phys_addr); + error = -EFAULT; + goto failed2; + } + + /* Disable all the interrupts, just in case */ + out_be32(drvdata->base_address + XPS2_IPIER_OFFSET, 0); + + /* + * Reset the PS2 device and abort any current transaction, + * to make sure we have the PS2 in a good state. + */ + out_be32(drvdata->base_address + XPS2_SRST_OFFSET, XPS2_SRST_RESET); + + dev_info(dev, "Xilinx PS2 at 0x%08llX mapped to 0x%p, irq=%d\n", + (unsigned long long)phys_addr, drvdata->base_address, + drvdata->irq); + + serio->id.type = SERIO_8042; + serio->write = sxps2_write; + serio->open = sxps2_open; + serio->close = sxps2_close; + serio->port_data = drvdata; + serio->dev.parent = dev; + snprintf(serio->name, sizeof(serio->name), + "Xilinx XPS PS/2 at %08llX", (unsigned long long)phys_addr); + snprintf(serio->phys, sizeof(serio->phys), + "xilinxps2/serio at %08llX", (unsigned long long)phys_addr); + + serio_register_port(serio); + + platform_set_drvdata(ofdev, drvdata); + return 0; /* success */ + +failed2: + release_mem_region(phys_addr, remap_size); +failed1: + kfree(serio); + kfree(drvdata); + + return error; +} + +/** + * xps2_of_remove - unbinds the driver from the PS/2 device. + * @of_dev: pointer to OF device structure + * + * This function is called if a device is physically removed from the system or + * if the driver module is being unloaded. It frees any resources allocated to + * the device. + */ +static int xps2_of_remove(struct platform_device *of_dev) +{ + struct xps2data *drvdata = platform_get_drvdata(of_dev); + struct resource r_mem; /* IO mem resources */ + + serio_unregister_port(drvdata->serio); + iounmap(drvdata->base_address); + + /* Get iospace of the device */ + if (of_address_to_resource(of_dev->dev.of_node, 0, &r_mem)) + dev_err(drvdata->dev, "invalid address\n"); + else + release_mem_region(r_mem.start, resource_size(&r_mem)); + + kfree(drvdata); + + return 0; +} + +/* Match table for of_platform binding */ +static const struct of_device_id xps2_of_match[] = { + { .compatible = "xlnx,xps-ps2-1.00.a", }, + { /* end of list */ }, +}; +MODULE_DEVICE_TABLE(of, xps2_of_match); + +static struct platform_driver xps2_of_driver = { + .driver = { + .name = DRIVER_NAME, + .of_match_table = xps2_of_match, + }, + .probe = xps2_of_probe, + .remove = xps2_of_remove, +}; +module_platform_driver(xps2_of_driver); + +MODULE_AUTHOR("Xilinx, Inc."); +MODULE_DESCRIPTION("Xilinx XPS PS/2 driver"); +MODULE_LICENSE("GPL"); + |