diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/parisc/lasi.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/parisc/lasi.c b/drivers/parisc/lasi.c new file mode 100644 index 000000000..6ef621adb --- /dev/null +++ b/drivers/parisc/lasi.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LASI Device Driver + * + * (c) Copyright 1999 Red Hat Software + * Portions (c) Copyright 1999 The Puffin Group Inc. + * Portions (c) Copyright 1999 Hewlett-Packard + * + * by Alan Cox <alan@redhat.com> and + * Alex deVries <alex@onefishtwo.ca> + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/pm.h> +#include <linux/types.h> + +#include <asm/io.h> +#include <asm/hardware.h> +#include <asm/led.h> + +#include "gsc.h" + + +#define LASI_VER 0xC008 /* LASI Version */ + +#define LASI_IO_CONF 0x7FFFE /* LASI primary configuration register */ +#define LASI_IO_CONF2 0x7FFFF /* LASI secondary configuration register */ + +static void lasi_choose_irq(struct parisc_device *dev, void *ctrl) +{ + int irq; + + switch (dev->id.sversion) { + case 0x74: irq = 7; break; /* Centronics */ + case 0x7B: irq = 13; break; /* Audio */ + case 0x81: irq = 14; break; /* Lasi itself */ + case 0x82: irq = 9; break; /* SCSI */ + case 0x83: irq = 20; break; /* Floppy */ + case 0x84: irq = 26; break; /* PS/2 Keyboard */ + case 0x87: irq = 18; break; /* ISDN */ + case 0x8A: irq = 8; break; /* LAN */ + case 0x8C: irq = 5; break; /* RS232 */ + case 0x8D: irq = (dev->hw_path == 13) ? 16 : 17; break; + /* Telephone */ + default: return; /* unknown */ + } + + gsc_asic_assign_irq(ctrl, irq, &dev->irq); +} + +static void __init +lasi_init_irq(struct gsc_asic *this_lasi) +{ + unsigned long lasi_base = this_lasi->hpa; + + /* Stop LASI barking for a bit */ + gsc_writel(0x00000000, lasi_base+OFFSET_IMR); + + /* clear pending interrupts */ + gsc_readl(lasi_base+OFFSET_IRR); + + /* We're not really convinced we want to reset the onboard + * devices. Firmware does it for us... + */ + + /* Resets */ + /* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/ /* Parallel */ + if(pdc_add_valid(lasi_base+0x4004) == PDC_OK) + gsc_writel(0xFFFFFFFF, lasi_base+0x4004); /* Audio */ + /* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/ /* Serial */ + /* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/ /* SCSI */ + gsc_writel(0xFFFFFFFF, lasi_base+0x7000); /* LAN */ + gsc_writel(0xFFFFFFFF, lasi_base+0x8000); /* Keyboard */ + gsc_writel(0xFFFFFFFF, lasi_base+0xA000); /* FDC */ + + /* Ok we hit it on the head with a hammer, our Dog is now + ** comatose and muzzled. Devices will now unmask LASI + ** interrupts as they are registered as irq's in the LASI range. + */ + /* XXX: I thought it was `awks that got `it on the `ead with an + * `ammer. -- willy + */ +} + + +/* + ** lasi_led_init() + ** + ** lasi_led_init() initializes the LED controller on the LASI. + ** + ** Since Mirage and Electra machines use a different LED + ** address register, we need to check for these machines + ** explicitly. + */ + +#ifndef CONFIG_CHASSIS_LCD_LED + +#define lasi_led_init(x) /* nothing */ + +#else + +static void __init lasi_led_init(unsigned long lasi_hpa) +{ + unsigned long datareg; + + switch (CPU_HVERSION) { + /* Gecko machines have only one single LED, which can be permanently + turned on by writing a zero into the power control register. */ + case 0x600: /* Gecko (712/60) */ + case 0x601: /* Gecko (712/80) */ + case 0x602: /* Gecko (712/100) */ + case 0x603: /* Anole 64 (743/64) */ + case 0x604: /* Anole 100 (743/100) */ + case 0x605: /* Gecko (712/120) */ + datareg = lasi_hpa + 0x0000C000; + gsc_writeb(0, datareg); + return; /* no need to register the LED interrupt-function */ + + /* Mirage and Electra machines need special offsets */ + case 0x60A: /* Mirage Jr (715/64) */ + case 0x60B: /* Mirage 100 */ + case 0x60C: /* Mirage 100+ */ + case 0x60D: /* Electra 100 */ + case 0x60E: /* Electra 120 */ + datareg = lasi_hpa - 0x00020000; + break; + + default: + datareg = lasi_hpa + 0x0000C000; + break; + } + + register_led_driver(DISPLAY_MODEL_LASI, LED_CMD_REG_NONE, datareg); +} +#endif + +/* + * lasi_power_off + * + * Function for lasi to turn off the power. This is accomplished by setting a + * 1 to PWR_ON_L in the Power Control Register + * + */ + +static unsigned long lasi_power_off_hpa __read_mostly; + +static void lasi_power_off(void) +{ + unsigned long datareg; + + /* calculate addr of the Power Control Register */ + datareg = lasi_power_off_hpa + 0x0000C000; + + /* Power down the machine */ + gsc_writel(0x02, datareg); +} + +static int __init lasi_init_chip(struct parisc_device *dev) +{ + extern void (*chassis_power_off)(void); + struct gsc_asic *lasi; + int ret; + + lasi = kzalloc(sizeof(*lasi), GFP_KERNEL); + if (!lasi) + return -ENOMEM; + + lasi->name = "Lasi"; + lasi->hpa = dev->hpa.start; + + /* Check the 4-bit (yes, only 4) version register */ + lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf; + printk(KERN_INFO "%s version %d at 0x%lx found.\n", + lasi->name, lasi->version, lasi->hpa); + + /* initialize the chassis LEDs really early */ + lasi_led_init(lasi->hpa); + + /* Stop LASI barking for a bit */ + lasi_init_irq(lasi); + + /* the IRQ lasi should use */ + dev->irq = gsc_alloc_irq(&lasi->gsc_irq); + if (dev->irq < 0) { + printk(KERN_ERR "%s(): cannot get GSC irq\n", + __func__); + kfree(lasi); + return -EBUSY; + } + + lasi->eim = ((u32) lasi->gsc_irq.txn_addr) | lasi->gsc_irq.txn_data; + + ret = request_irq(lasi->gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi); + if (ret < 0) { + kfree(lasi); + return ret; + } + + /* enable IRQ's for devices below LASI */ + gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR); + + /* Done init'ing, register this driver */ + ret = gsc_common_setup(dev, lasi); + if (ret) { + kfree(lasi); + return ret; + } + + gsc_fixup_irqs(dev, lasi, lasi_choose_irq); + + /* initialize the power off function */ + /* FIXME: Record the LASI HPA for the power off function. This should + * ensure that only the first LASI (the one controlling the power off) + * should set the HPA here */ + lasi_power_off_hpa = lasi->hpa; + chassis_power_off = lasi_power_off; + + return ret; +} + +static struct parisc_device_id lasi_tbl[] __initdata = { + { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 }, + { 0, } +}; + +struct parisc_driver lasi_driver __refdata = { + .name = "lasi", + .id_table = lasi_tbl, + .probe = lasi_init_chip, +}; |