diff options
Diffstat (limited to 'drivers/media/rc/serial_ir.c')
| -rw-r--r-- | drivers/media/rc/serial_ir.c | 844 |
1 files changed, 844 insertions, 0 deletions
diff --git a/drivers/media/rc/serial_ir.c b/drivers/media/rc/serial_ir.c new file mode 100644 index 0000000000..96ae0294ac --- /dev/null +++ b/drivers/media/rc/serial_ir.c @@ -0,0 +1,844 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * serial_ir.c + * + * serial_ir - Device driver that records pulse- and pause-lengths + * (space-lengths) between DDCD event on a serial port. + * + * Copyright (C) 1996,97 Ralph Metzler <rjkm@thp.uni-koeln.de> + * Copyright (C) 1998 Trent Piepho <xyzzy@u.washington.edu> + * Copyright (C) 1998 Ben Pfaff <blp@gnu.org> + * Copyright (C) 1999 Christoph Bartelmus <lirc@bartelmus.de> + * Copyright (C) 2007 Andrei Tanas <andrei@tanas.ca> (suspend/resume support) + * Copyright (C) 2016 Sean Young <sean@mess.org> (port to rc-core) + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/serial_reg.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <media/rc-core.h> + +struct serial_ir_hw { + int signal_pin; + int signal_pin_change; + u8 on; + u8 off; + unsigned set_send_carrier:1; + unsigned set_duty_cycle:1; + void (*send_pulse)(unsigned int length, ktime_t edge); + void (*send_space)(void); + spinlock_t lock; +}; + +#define IR_HOMEBREW 0 +#define IR_IRDEO 1 +#define IR_IRDEO_REMOTE 2 +#define IR_ANIMAX 3 +#define IR_IGOR 4 + +/* module parameters */ +static int type; +static int io; +static int irq; +static ulong iommap; +static int ioshift; +static bool softcarrier = true; +static bool share_irq; +static int sense = -1; /* -1 = auto, 0 = active high, 1 = active low */ +static bool txsense; /* 0 = active high, 1 = active low */ + +/* forward declarations */ +static void send_pulse_irdeo(unsigned int length, ktime_t edge); +static void send_space_irdeo(void); +#ifdef CONFIG_IR_SERIAL_TRANSMITTER +static void send_pulse_homebrew(unsigned int length, ktime_t edge); +static void send_space_homebrew(void); +#endif + +static struct serial_ir_hw hardware[] = { + [IR_HOMEBREW] = { + .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_HOMEBREW].lock), + .signal_pin = UART_MSR_DCD, + .signal_pin_change = UART_MSR_DDCD, + .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR), + .off = (UART_MCR_RTS | UART_MCR_OUT2), +#ifdef CONFIG_IR_SERIAL_TRANSMITTER + .send_pulse = send_pulse_homebrew, + .send_space = send_space_homebrew, + .set_send_carrier = true, + .set_duty_cycle = true, +#endif + }, + + [IR_IRDEO] = { + .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO].lock), + .signal_pin = UART_MSR_DSR, + .signal_pin_change = UART_MSR_DDSR, + .on = UART_MCR_OUT2, + .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), + .send_pulse = send_pulse_irdeo, + .send_space = send_space_irdeo, + .set_duty_cycle = true, + }, + + [IR_IRDEO_REMOTE] = { + .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO_REMOTE].lock), + .signal_pin = UART_MSR_DSR, + .signal_pin_change = UART_MSR_DDSR, + .on = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), + .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), + .send_pulse = send_pulse_irdeo, + .send_space = send_space_irdeo, + .set_duty_cycle = true, + }, + + [IR_ANIMAX] = { + .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_ANIMAX].lock), + .signal_pin = UART_MSR_DCD, + .signal_pin_change = UART_MSR_DDCD, + .on = 0, + .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), + }, + + [IR_IGOR] = { + .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IGOR].lock), + .signal_pin = UART_MSR_DSR, + .signal_pin_change = UART_MSR_DDSR, + .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR), + .off = (UART_MCR_RTS | UART_MCR_OUT2), +#ifdef CONFIG_IR_SERIAL_TRANSMITTER + .send_pulse = send_pulse_homebrew, + .send_space = send_space_homebrew, + .set_send_carrier = true, + .set_duty_cycle = true, +#endif + }, +}; + +#define RS_ISR_PASS_LIMIT 256 + +struct serial_ir { + ktime_t lastkt; + struct rc_dev *rcdev; + struct platform_device *pdev; + struct timer_list timeout_timer; + + unsigned int carrier; + unsigned int duty_cycle; +}; + +static struct serial_ir serial_ir; + +/* fetch serial input packet (1 byte) from register offset */ +static u8 sinp(int offset) +{ + if (iommap) + /* the register is memory-mapped */ + offset <<= ioshift; + + return inb(io + offset); +} + +/* write serial output packet (1 byte) of value to register offset */ +static void soutp(int offset, u8 value) +{ + if (iommap) + /* the register is memory-mapped */ + offset <<= ioshift; + + outb(value, io + offset); +} + +static void on(void) +{ + if (txsense) + soutp(UART_MCR, hardware[type].off); + else + soutp(UART_MCR, hardware[type].on); +} + +static void off(void) +{ + if (txsense) + soutp(UART_MCR, hardware[type].on); + else + soutp(UART_MCR, hardware[type].off); +} + +static void send_pulse_irdeo(unsigned int length, ktime_t target) +{ + long rawbits; + int i; + unsigned char output; + unsigned char chunk, shifted; + + /* how many bits have to be sent ? */ + rawbits = length * 1152 / 10000; + if (serial_ir.duty_cycle > 50) + chunk = 3; + else + chunk = 1; + for (i = 0, output = 0x7f; rawbits > 0; rawbits -= 3) { + shifted = chunk << (i * 3); + shifted >>= 1; + output &= (~shifted); + i++; + if (i == 3) { + soutp(UART_TX, output); + while (!(sinp(UART_LSR) & UART_LSR_THRE)) + ; + output = 0x7f; + i = 0; + } + } + if (i != 0) { + soutp(UART_TX, output); + while (!(sinp(UART_LSR) & UART_LSR_TEMT)) + ; + } +} + +static void send_space_irdeo(void) +{ +} + +#ifdef CONFIG_IR_SERIAL_TRANSMITTER +static void send_pulse_homebrew_softcarrier(unsigned int length, ktime_t edge) +{ + ktime_t now, target = ktime_add_us(edge, length); + /* + * delta should never exceed 4 seconds and on m68k + * ndelay(s64) does not compile; so use s32 rather than s64. + */ + s32 delta; + unsigned int pulse, space; + + /* Ensure the dividend fits into 32 bit */ + pulse = DIV_ROUND_CLOSEST(serial_ir.duty_cycle * (NSEC_PER_SEC / 100), + serial_ir.carrier); + space = DIV_ROUND_CLOSEST((100 - serial_ir.duty_cycle) * + (NSEC_PER_SEC / 100), serial_ir.carrier); + + for (;;) { + now = ktime_get(); + if (ktime_compare(now, target) >= 0) + break; + on(); + edge = ktime_add_ns(edge, pulse); + delta = ktime_to_ns(ktime_sub(edge, now)); + if (delta > 0) + ndelay(delta); + now = ktime_get(); + off(); + if (ktime_compare(now, target) >= 0) + break; + edge = ktime_add_ns(edge, space); + delta = ktime_to_ns(ktime_sub(edge, now)); + if (delta > 0) + ndelay(delta); + } +} + +static void send_pulse_homebrew(unsigned int length, ktime_t edge) +{ + if (softcarrier) + send_pulse_homebrew_softcarrier(length, edge); + else + on(); +} + +static void send_space_homebrew(void) +{ + off(); +} +#endif + +static void frbwrite(unsigned int l, bool is_pulse) +{ + /* simple noise filter */ + static unsigned int ptr, pulse, space; + struct ir_raw_event ev = {}; + + if (ptr > 0 && is_pulse) { + pulse += l; + if (pulse > 250) { + ev.duration = space; + ev.pulse = false; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); + ev.duration = pulse; + ev.pulse = true; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); + ptr = 0; + pulse = 0; + } + return; + } + if (!is_pulse) { + if (ptr == 0) { + if (l > 20000) { + space = l; + ptr++; + return; + } + } else { + if (l > 20000) { + space += pulse; + if (space > IR_MAX_DURATION) + space = IR_MAX_DURATION; + space += l; + if (space > IR_MAX_DURATION) + space = IR_MAX_DURATION; + pulse = 0; + return; + } + + ev.duration = space; + ev.pulse = false; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); + ev.duration = pulse; + ev.pulse = true; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); + ptr = 0; + pulse = 0; + } + } + + ev.duration = l; + ev.pulse = is_pulse; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); +} + +static irqreturn_t serial_ir_irq_handler(int i, void *blah) +{ + ktime_t kt; + int counter, dcd; + u8 status; + ktime_t delkt; + unsigned int data; + static int last_dcd = -1; + + if ((sinp(UART_IIR) & UART_IIR_NO_INT)) { + /* not our interrupt */ + return IRQ_NONE; + } + + counter = 0; + do { + counter++; + status = sinp(UART_MSR); + if (counter > RS_ISR_PASS_LIMIT) { + dev_err(&serial_ir.pdev->dev, "Trapped in interrupt"); + break; + } + if ((status & hardware[type].signal_pin_change) && + sense != -1) { + /* get current time */ + kt = ktime_get(); + + /* + * The driver needs to know if your receiver is + * active high or active low, or the space/pulse + * sense could be inverted. + */ + + /* calc time since last interrupt in nanoseconds */ + dcd = (status & hardware[type].signal_pin) ? 1 : 0; + + if (dcd == last_dcd) { + dev_dbg(&serial_ir.pdev->dev, + "ignoring spike: %d %d %lldns %lldns\n", + dcd, sense, ktime_to_ns(kt), + ktime_to_ns(serial_ir.lastkt)); + continue; + } + + delkt = ktime_sub(kt, serial_ir.lastkt); + if (ktime_compare(delkt, ktime_set(15, 0)) > 0) { + data = IR_MAX_DURATION; /* really long time */ + if (!(dcd ^ sense)) { + /* sanity check */ + dev_err(&serial_ir.pdev->dev, + "dcd unexpected: %d %d %lldns %lldns\n", + dcd, sense, ktime_to_ns(kt), + ktime_to_ns(serial_ir.lastkt)); + /* + * detecting pulse while this + * MUST be a space! + */ + sense = sense ? 0 : 1; + } + } else { + data = ktime_to_us(delkt); + } + frbwrite(data, !(dcd ^ sense)); + serial_ir.lastkt = kt; + last_dcd = dcd; + } + } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */ + + mod_timer(&serial_ir.timeout_timer, + jiffies + usecs_to_jiffies(serial_ir.rcdev->timeout)); + + ir_raw_event_handle(serial_ir.rcdev); + + return IRQ_HANDLED; +} + +static int hardware_init_port(void) +{ + u8 scratch, scratch2, scratch3; + + /* + * This is a simple port existence test, borrowed from the autoconfig + * function in drivers/tty/serial/8250/8250_port.c + */ + scratch = sinp(UART_IER); + soutp(UART_IER, 0); +#ifdef __i386__ + outb(0xff, 0x080); +#endif + scratch2 = sinp(UART_IER) & 0x0f; + soutp(UART_IER, 0x0f); +#ifdef __i386__ + outb(0x00, 0x080); +#endif + scratch3 = sinp(UART_IER) & 0x0f; + soutp(UART_IER, scratch); + if (scratch2 != 0 || scratch3 != 0x0f) { + /* we fail, there's nothing here */ + pr_err("port existence test failed, cannot continue\n"); + return -ENODEV; + } + + /* Set DLAB 0. */ + soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); + + /* First of all, disable all interrupts */ + soutp(UART_IER, sinp(UART_IER) & + (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); + + /* Clear registers. */ + sinp(UART_LSR); + sinp(UART_RX); + sinp(UART_IIR); + sinp(UART_MSR); + + /* Set line for power source */ + off(); + + /* Clear registers again to be sure. */ + sinp(UART_LSR); + sinp(UART_RX); + sinp(UART_IIR); + sinp(UART_MSR); + + switch (type) { + case IR_IRDEO: + case IR_IRDEO_REMOTE: + /* setup port to 7N1 @ 115200 Baud */ + /* 7N1+start = 9 bits at 115200 ~ 3 bits at 38kHz */ + + /* Set DLAB 1. */ + soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB); + /* Set divisor to 1 => 115200 Baud */ + soutp(UART_DLM, 0); + soutp(UART_DLL, 1); + /* Set DLAB 0 + 7N1 */ + soutp(UART_LCR, UART_LCR_WLEN7); + /* THR interrupt already disabled at this point */ + break; + default: + break; + } + + return 0; +} + +static void serial_ir_timeout(struct timer_list *unused) +{ + struct ir_raw_event ev = { + .timeout = true, + .duration = serial_ir.rcdev->timeout + }; + ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); + ir_raw_event_handle(serial_ir.rcdev); +} + +/* Needed by serial_ir_probe() */ +static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf, + unsigned int count); +static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle); +static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier); +static int serial_ir_open(struct rc_dev *rcdev); +static void serial_ir_close(struct rc_dev *rcdev); + +static int serial_ir_probe(struct platform_device *dev) +{ + struct rc_dev *rcdev; + int i, nlow, nhigh, result; + + rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW); + if (!rcdev) + return -ENOMEM; + + if (hardware[type].send_pulse && hardware[type].send_space) + rcdev->tx_ir = serial_ir_tx; + if (hardware[type].set_send_carrier) + rcdev->s_tx_carrier = serial_ir_tx_carrier; + if (hardware[type].set_duty_cycle) + rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle; + + switch (type) { + case IR_HOMEBREW: + rcdev->device_name = "Serial IR type home-brew"; + break; + case IR_IRDEO: + rcdev->device_name = "Serial IR type IRdeo"; + break; + case IR_IRDEO_REMOTE: + rcdev->device_name = "Serial IR type IRdeo remote"; + break; + case IR_ANIMAX: + rcdev->device_name = "Serial IR type AnimaX"; + break; + case IR_IGOR: + rcdev->device_name = "Serial IR type IgorPlug"; + break; + } + + rcdev->input_phys = KBUILD_MODNAME "/input0"; + rcdev->input_id.bustype = BUS_HOST; + rcdev->input_id.vendor = 0x0001; + rcdev->input_id.product = 0x0001; + rcdev->input_id.version = 0x0100; + rcdev->open = serial_ir_open; + rcdev->close = serial_ir_close; + rcdev->dev.parent = &serial_ir.pdev->dev; + rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; + rcdev->driver_name = KBUILD_MODNAME; + rcdev->map_name = RC_MAP_RC6_MCE; + rcdev->min_timeout = 1; + rcdev->timeout = IR_DEFAULT_TIMEOUT; + rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT; + rcdev->rx_resolution = 250; + + serial_ir.rcdev = rcdev; + + timer_setup(&serial_ir.timeout_timer, serial_ir_timeout, 0); + + result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler, + share_irq ? IRQF_SHARED : 0, + KBUILD_MODNAME, &hardware); + if (result < 0) { + if (result == -EBUSY) + dev_err(&dev->dev, "IRQ %d busy\n", irq); + else if (result == -EINVAL) + dev_err(&dev->dev, "Bad irq number or handler\n"); + return result; + } + + /* Reserve io region. */ + if ((iommap && + (devm_request_mem_region(&dev->dev, iommap, 8UL << ioshift, + KBUILD_MODNAME) == NULL)) || + (!iommap && (devm_request_region(&dev->dev, io, 8, + KBUILD_MODNAME) == NULL))) { + dev_err(&dev->dev, "port %04x already in use\n", io); + dev_warn(&dev->dev, "use 'setserial /dev/ttySX uart none'\n"); + dev_warn(&dev->dev, + "or compile the serial port driver as module and\n"); + dev_warn(&dev->dev, "make sure this module is loaded first\n"); + return -EBUSY; + } + + result = hardware_init_port(); + if (result < 0) + return result; + + /* Initialize pulse/space widths */ + serial_ir.duty_cycle = 50; + serial_ir.carrier = 38000; + + /* If pin is high, then this must be an active low receiver. */ + if (sense == -1) { + /* wait 1/2 sec for the power supply */ + msleep(500); + + /* + * probe 9 times every 0.04s, collect "votes" for + * active high/low + */ + nlow = 0; + nhigh = 0; + for (i = 0; i < 9; i++) { + if (sinp(UART_MSR) & hardware[type].signal_pin) + nlow++; + else + nhigh++; + msleep(40); + } + sense = nlow >= nhigh ? 1 : 0; + dev_info(&dev->dev, "auto-detected active %s receiver\n", + sense ? "low" : "high"); + } else + dev_info(&dev->dev, "Manually using active %s receiver\n", + sense ? "low" : "high"); + + dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io); + + return devm_rc_register_device(&dev->dev, rcdev); +} + +static int serial_ir_open(struct rc_dev *rcdev) +{ + unsigned long flags; + + /* initialize timestamp */ + serial_ir.lastkt = ktime_get(); + + spin_lock_irqsave(&hardware[type].lock, flags); + + /* Set DLAB 0. */ + soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); + + soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI); + + spin_unlock_irqrestore(&hardware[type].lock, flags); + + return 0; +} + +static void serial_ir_close(struct rc_dev *rcdev) +{ + unsigned long flags; + + spin_lock_irqsave(&hardware[type].lock, flags); + + /* Set DLAB 0. */ + soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); + + /* First of all, disable all interrupts */ + soutp(UART_IER, sinp(UART_IER) & + (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); + spin_unlock_irqrestore(&hardware[type].lock, flags); +} + +static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf, + unsigned int count) +{ + unsigned long flags; + ktime_t edge; + s64 delta; + int i; + + spin_lock_irqsave(&hardware[type].lock, flags); + if (type == IR_IRDEO) { + /* DTR, RTS down */ + on(); + } + + edge = ktime_get(); + for (i = 0; i < count; i++) { + if (i % 2) + hardware[type].send_space(); + else + hardware[type].send_pulse(txbuf[i], edge); + + edge = ktime_add_us(edge, txbuf[i]); + delta = ktime_us_delta(edge, ktime_get()); + if (delta > 25) { + spin_unlock_irqrestore(&hardware[type].lock, flags); + usleep_range(delta - 25, delta + 25); + spin_lock_irqsave(&hardware[type].lock, flags); + } else if (delta > 0) { + udelay(delta); + } + } + off(); + spin_unlock_irqrestore(&hardware[type].lock, flags); + return count; +} + +static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle) +{ + serial_ir.duty_cycle = cycle; + return 0; +} + +static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier) +{ + if (carrier > 500000 || carrier < 20000) + return -EINVAL; + + serial_ir.carrier = carrier; + return 0; +} + +static int serial_ir_suspend(struct platform_device *dev, + pm_message_t state) +{ + /* Set DLAB 0. */ + soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); + + /* Disable all interrupts */ + soutp(UART_IER, sinp(UART_IER) & + (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); + + /* Clear registers. */ + sinp(UART_LSR); + sinp(UART_RX); + sinp(UART_IIR); + sinp(UART_MSR); + + return 0; +} + +static int serial_ir_resume(struct platform_device *dev) +{ + unsigned long flags; + int result; + + result = hardware_init_port(); + if (result < 0) + return result; + + spin_lock_irqsave(&hardware[type].lock, flags); + /* Enable Interrupt */ + serial_ir.lastkt = ktime_get(); + soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI); + off(); + + spin_unlock_irqrestore(&hardware[type].lock, flags); + + return 0; +} + +static struct platform_driver serial_ir_driver = { + .probe = serial_ir_probe, + .suspend = serial_ir_suspend, + .resume = serial_ir_resume, + .driver = { + .name = "serial_ir", + }, +}; + +static int __init serial_ir_init(void) +{ + int result; + + result = platform_driver_register(&serial_ir_driver); + if (result) + return result; + + serial_ir.pdev = platform_device_alloc("serial_ir", 0); + if (!serial_ir.pdev) { + result = -ENOMEM; + goto exit_driver_unregister; + } + + result = platform_device_add(serial_ir.pdev); + if (result) + goto exit_device_put; + + return 0; + +exit_device_put: + platform_device_put(serial_ir.pdev); +exit_driver_unregister: + platform_driver_unregister(&serial_ir_driver); + return result; +} + +static void serial_ir_exit(void) +{ + platform_device_unregister(serial_ir.pdev); + platform_driver_unregister(&serial_ir_driver); +} + +static int __init serial_ir_init_module(void) +{ + switch (type) { + case IR_HOMEBREW: + case IR_IRDEO: + case IR_IRDEO_REMOTE: + case IR_ANIMAX: + case IR_IGOR: + /* if nothing specified, use ttyS0/com1 and irq 4 */ + io = io ? io : 0x3f8; + irq = irq ? irq : 4; + break; + default: + return -EINVAL; + } + if (!softcarrier) { + switch (type) { + case IR_HOMEBREW: + case IR_IGOR: + hardware[type].set_send_carrier = false; + hardware[type].set_duty_cycle = false; + break; + } + } + + /* make sure sense is either -1, 0, or 1 */ + if (sense != -1) + sense = !!sense; + + return serial_ir_init(); +} + +static void __exit serial_ir_exit_module(void) +{ + del_timer_sync(&serial_ir.timeout_timer); + serial_ir_exit(); +} + +module_init(serial_ir_init_module); +module_exit(serial_ir_exit_module); + +MODULE_DESCRIPTION("Infra-red receiver driver for serial ports."); +MODULE_AUTHOR("Ralph Metzler, Trent Piepho, Ben Pfaff, Christoph Bartelmus, Andrei Tanas"); +MODULE_LICENSE("GPL"); + +module_param(type, int, 0444); +MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo, 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug"); + +module_param_hw(io, int, ioport, 0444); +MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)"); + +/* some architectures (e.g. intel xscale) have memory mapped registers */ +module_param_hw(iommap, ulong, other, 0444); +MODULE_PARM_DESC(iommap, "physical base for memory mapped I/O (0 = no memory mapped io)"); + +/* + * some architectures (e.g. intel xscale) align the 8bit serial registers + * on 32bit word boundaries. + * See linux-kernel/drivers/tty/serial/8250/8250.c serial_in()/out() + */ +module_param_hw(ioshift, int, other, 0444); +MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)"); + +module_param_hw(irq, int, irq, 0444); +MODULE_PARM_DESC(irq, "Interrupt (4 or 3)"); + +module_param_hw(share_irq, bool, other, 0444); +MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)"); + +module_param(sense, int, 0444); +MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit (0 = active high, 1 = active low )"); + +#ifdef CONFIG_IR_SERIAL_TRANSMITTER +module_param(txsense, bool, 0444); +MODULE_PARM_DESC(txsense, "Sense of transmitter circuit (0 = active high, 1 = active low )"); +#endif + +module_param(softcarrier, bool, 0444); +MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)"); |