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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * serial_ir.c4 *5 * serial_ir - Device driver that records pulse- and pause-lengths6 * (space-lengths) between DDCD event on a serial port.7 *8 * Copyright (C) 1996,97 Ralph Metzler <rjkm@thp.uni-koeln.de>9 * Copyright (C) 1998 Trent Piepho <xyzzy@u.washington.edu>10 * Copyright (C) 1998 Ben Pfaff <blp@gnu.org>11 * Copyright (C) 1999 Christoph Bartelmus <lirc@bartelmus.de>12 * Copyright (C) 2007 Andrei Tanas <andrei@tanas.ca> (suspend/resume support)13 * Copyright (C) 2016 Sean Young <sean@mess.org> (port to rc-core)14 */15 16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt17 18#include <linux/module.h>19#include <linux/errno.h>20#include <linux/interrupt.h>21#include <linux/io.h>22#include <linux/kernel.h>23#include <linux/serial_reg.h>24#include <linux/types.h>25#include <linux/delay.h>26#include <linux/platform_device.h>27#include <linux/spinlock.h>28#include <media/rc-core.h>29 30struct serial_ir_hw {31 int signal_pin;32 int signal_pin_change;33 u8 on;34 u8 off;35 unsigned set_send_carrier:1;36 unsigned set_duty_cycle:1;37 void (*send_pulse)(unsigned int length, ktime_t edge);38 void (*send_space)(void);39 spinlock_t lock;40};41 42#define IR_HOMEBREW 043#define IR_IRDEO 144#define IR_IRDEO_REMOTE 245#define IR_ANIMAX 346#define IR_IGOR 447 48/* module parameters */49static int type;50static int io;51static int irq;52static ulong iommap;53static int ioshift;54static bool softcarrier = true;55static bool share_irq;56static int sense = -1; /* -1 = auto, 0 = active high, 1 = active low */57static bool txsense; /* 0 = active high, 1 = active low */58 59/* forward declarations */60static void send_pulse_irdeo(unsigned int length, ktime_t edge);61static void send_space_irdeo(void);62#ifdef CONFIG_IR_SERIAL_TRANSMITTER63static void send_pulse_homebrew(unsigned int length, ktime_t edge);64static void send_space_homebrew(void);65#endif66 67static struct serial_ir_hw hardware[] = {68 [IR_HOMEBREW] = {69 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_HOMEBREW].lock),70 .signal_pin = UART_MSR_DCD,71 .signal_pin_change = UART_MSR_DDCD,72 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),73 .off = (UART_MCR_RTS | UART_MCR_OUT2),74#ifdef CONFIG_IR_SERIAL_TRANSMITTER75 .send_pulse = send_pulse_homebrew,76 .send_space = send_space_homebrew,77 .set_send_carrier = true,78 .set_duty_cycle = true,79#endif80 },81 82 [IR_IRDEO] = {83 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO].lock),84 .signal_pin = UART_MSR_DSR,85 .signal_pin_change = UART_MSR_DDSR,86 .on = UART_MCR_OUT2,87 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),88 .send_pulse = send_pulse_irdeo,89 .send_space = send_space_irdeo,90 .set_duty_cycle = true,91 },92 93 [IR_IRDEO_REMOTE] = {94 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO_REMOTE].lock),95 .signal_pin = UART_MSR_DSR,96 .signal_pin_change = UART_MSR_DDSR,97 .on = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),98 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),99 .send_pulse = send_pulse_irdeo,100 .send_space = send_space_irdeo,101 .set_duty_cycle = true,102 },103 104 [IR_ANIMAX] = {105 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_ANIMAX].lock),106 .signal_pin = UART_MSR_DCD,107 .signal_pin_change = UART_MSR_DDCD,108 .on = 0,109 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),110 },111 112 [IR_IGOR] = {113 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IGOR].lock),114 .signal_pin = UART_MSR_DSR,115 .signal_pin_change = UART_MSR_DDSR,116 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),117 .off = (UART_MCR_RTS | UART_MCR_OUT2),118#ifdef CONFIG_IR_SERIAL_TRANSMITTER119 .send_pulse = send_pulse_homebrew,120 .send_space = send_space_homebrew,121 .set_send_carrier = true,122 .set_duty_cycle = true,123#endif124 },125};126 127#define RS_ISR_PASS_LIMIT 256128 129struct serial_ir {130 ktime_t lastkt;131 struct rc_dev *rcdev;132 struct platform_device *pdev;133 struct timer_list timeout_timer;134 135 unsigned int carrier;136 unsigned int duty_cycle;137};138 139static struct serial_ir serial_ir;140 141/* fetch serial input packet (1 byte) from register offset */142static u8 sinp(int offset)143{144 if (iommap)145 /* the register is memory-mapped */146 offset <<= ioshift;147 148 return inb(io + offset);149}150 151/* write serial output packet (1 byte) of value to register offset */152static void soutp(int offset, u8 value)153{154 if (iommap)155 /* the register is memory-mapped */156 offset <<= ioshift;157 158 outb(value, io + offset);159}160 161static void on(void)162{163 if (txsense)164 soutp(UART_MCR, hardware[type].off);165 else166 soutp(UART_MCR, hardware[type].on);167}168 169static void off(void)170{171 if (txsense)172 soutp(UART_MCR, hardware[type].on);173 else174 soutp(UART_MCR, hardware[type].off);175}176 177static void send_pulse_irdeo(unsigned int length, ktime_t target)178{179 long rawbits;180 int i;181 unsigned char output;182 unsigned char chunk, shifted;183 184 /* how many bits have to be sent ? */185 rawbits = length * 1152 / 10000;186 if (serial_ir.duty_cycle > 50)187 chunk = 3;188 else189 chunk = 1;190 for (i = 0, output = 0x7f; rawbits > 0; rawbits -= 3) {191 shifted = chunk << (i * 3);192 shifted >>= 1;193 output &= (~shifted);194 i++;195 if (i == 3) {196 soutp(UART_TX, output);197 while (!(sinp(UART_LSR) & UART_LSR_THRE))198 ;199 output = 0x7f;200 i = 0;201 }202 }203 if (i != 0) {204 soutp(UART_TX, output);205 while (!(sinp(UART_LSR) & UART_LSR_TEMT))206 ;207 }208}209 210static void send_space_irdeo(void)211{212}213 214#ifdef CONFIG_IR_SERIAL_TRANSMITTER215static void send_pulse_homebrew_softcarrier(unsigned int length, ktime_t edge)216{217 ktime_t now, target = ktime_add_us(edge, length);218 /*219 * delta should never exceed 4 seconds and on m68k220 * ndelay(s64) does not compile; so use s32 rather than s64.221 */222 s32 delta;223 unsigned int pulse, space;224 225 /* Ensure the dividend fits into 32 bit */226 pulse = DIV_ROUND_CLOSEST(serial_ir.duty_cycle * (NSEC_PER_SEC / 100),227 serial_ir.carrier);228 space = DIV_ROUND_CLOSEST((100 - serial_ir.duty_cycle) *229 (NSEC_PER_SEC / 100), serial_ir.carrier);230 231 for (;;) {232 now = ktime_get();233 if (ktime_compare(now, target) >= 0)234 break;235 on();236 edge = ktime_add_ns(edge, pulse);237 delta = ktime_to_ns(ktime_sub(edge, now));238 if (delta > 0)239 ndelay(delta);240 now = ktime_get();241 off();242 if (ktime_compare(now, target) >= 0)243 break;244 edge = ktime_add_ns(edge, space);245 delta = ktime_to_ns(ktime_sub(edge, now));246 if (delta > 0)247 ndelay(delta);248 }249}250 251static void send_pulse_homebrew(unsigned int length, ktime_t edge)252{253 if (softcarrier)254 send_pulse_homebrew_softcarrier(length, edge);255 else256 on();257}258 259static void send_space_homebrew(void)260{261 off();262}263#endif264 265static void frbwrite(unsigned int l, bool is_pulse)266{267 /* simple noise filter */268 static unsigned int ptr, pulse, space;269 struct ir_raw_event ev = {};270 271 if (ptr > 0 && is_pulse) {272 pulse += l;273 if (pulse > 250) {274 ev.duration = space;275 ev.pulse = false;276 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);277 ev.duration = pulse;278 ev.pulse = true;279 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);280 ptr = 0;281 pulse = 0;282 }283 return;284 }285 if (!is_pulse) {286 if (ptr == 0) {287 if (l > 20000) {288 space = l;289 ptr++;290 return;291 }292 } else {293 if (l > 20000) {294 space += pulse;295 if (space > IR_MAX_DURATION)296 space = IR_MAX_DURATION;297 space += l;298 if (space > IR_MAX_DURATION)299 space = IR_MAX_DURATION;300 pulse = 0;301 return;302 }303 304 ev.duration = space;305 ev.pulse = false;306 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);307 ev.duration = pulse;308 ev.pulse = true;309 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);310 ptr = 0;311 pulse = 0;312 }313 }314 315 ev.duration = l;316 ev.pulse = is_pulse;317 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);318}319 320static irqreturn_t serial_ir_irq_handler(int i, void *blah)321{322 ktime_t kt;323 int counter, dcd;324 u8 status;325 ktime_t delkt;326 unsigned int data;327 static int last_dcd = -1;328 329 if ((sinp(UART_IIR) & UART_IIR_NO_INT)) {330 /* not our interrupt */331 return IRQ_NONE;332 }333 334 counter = 0;335 do {336 counter++;337 status = sinp(UART_MSR);338 if (counter > RS_ISR_PASS_LIMIT) {339 dev_err(&serial_ir.pdev->dev, "Trapped in interrupt");340 break;341 }342 if ((status & hardware[type].signal_pin_change) &&343 sense != -1) {344 /* get current time */345 kt = ktime_get();346 347 /*348 * The driver needs to know if your receiver is349 * active high or active low, or the space/pulse350 * sense could be inverted.351 */352 353 /* calc time since last interrupt in nanoseconds */354 dcd = (status & hardware[type].signal_pin) ? 1 : 0;355 356 if (dcd == last_dcd) {357 dev_dbg(&serial_ir.pdev->dev,358 "ignoring spike: %d %d %lldns %lldns\n",359 dcd, sense, ktime_to_ns(kt),360 ktime_to_ns(serial_ir.lastkt));361 continue;362 }363 364 delkt = ktime_sub(kt, serial_ir.lastkt);365 if (ktime_compare(delkt, ktime_set(15, 0)) > 0) {366 data = IR_MAX_DURATION; /* really long time */367 if (!(dcd ^ sense)) {368 /* sanity check */369 dev_err(&serial_ir.pdev->dev,370 "dcd unexpected: %d %d %lldns %lldns\n",371 dcd, sense, ktime_to_ns(kt),372 ktime_to_ns(serial_ir.lastkt));373 /*374 * detecting pulse while this375 * MUST be a space!376 */377 sense = sense ? 0 : 1;378 }379 } else {380 data = ktime_to_us(delkt);381 }382 frbwrite(data, !(dcd ^ sense));383 serial_ir.lastkt = kt;384 last_dcd = dcd;385 }386 } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */387 388 mod_timer(&serial_ir.timeout_timer,389 jiffies + usecs_to_jiffies(serial_ir.rcdev->timeout));390 391 ir_raw_event_handle(serial_ir.rcdev);392 393 return IRQ_HANDLED;394}395 396static int hardware_init_port(void)397{398 u8 scratch, scratch2, scratch3;399 400 /*401 * This is a simple port existence test, borrowed from the autoconfig402 * function in drivers/tty/serial/8250/8250_port.c403 */404 scratch = sinp(UART_IER);405 soutp(UART_IER, 0);406#ifdef __i386__407 outb(0xff, 0x080);408#endif409 scratch2 = sinp(UART_IER) & 0x0f;410 soutp(UART_IER, 0x0f);411#ifdef __i386__412 outb(0x00, 0x080);413#endif414 scratch3 = sinp(UART_IER) & 0x0f;415 soutp(UART_IER, scratch);416 if (scratch2 != 0 || scratch3 != 0x0f) {417 /* we fail, there's nothing here */418 pr_err("port existence test failed, cannot continue\n");419 return -ENODEV;420 }421 422 /* Set DLAB 0. */423 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));424 425 /* First of all, disable all interrupts */426 soutp(UART_IER, sinp(UART_IER) &427 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));428 429 /* Clear registers. */430 sinp(UART_LSR);431 sinp(UART_RX);432 sinp(UART_IIR);433 sinp(UART_MSR);434 435 /* Set line for power source */436 off();437 438 /* Clear registers again to be sure. */439 sinp(UART_LSR);440 sinp(UART_RX);441 sinp(UART_IIR);442 sinp(UART_MSR);443 444 switch (type) {445 case IR_IRDEO:446 case IR_IRDEO_REMOTE:447 /* setup port to 7N1 @ 115200 Baud */448 /* 7N1+start = 9 bits at 115200 ~ 3 bits at 38kHz */449 450 /* Set DLAB 1. */451 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);452 /* Set divisor to 1 => 115200 Baud */453 soutp(UART_DLM, 0);454 soutp(UART_DLL, 1);455 /* Set DLAB 0 + 7N1 */456 soutp(UART_LCR, UART_LCR_WLEN7);457 /* THR interrupt already disabled at this point */458 break;459 default:460 break;461 }462 463 return 0;464}465 466static void serial_ir_timeout(struct timer_list *unused)467{468 struct ir_raw_event ev = {469 .timeout = true,470 .duration = serial_ir.rcdev->timeout471 };472 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);473 ir_raw_event_handle(serial_ir.rcdev);474}475 476/* Needed by serial_ir_probe() */477static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,478 unsigned int count);479static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle);480static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier);481static int serial_ir_open(struct rc_dev *rcdev);482static void serial_ir_close(struct rc_dev *rcdev);483 484static int serial_ir_probe(struct platform_device *dev)485{486 struct rc_dev *rcdev;487 int i, nlow, nhigh, result;488 489 rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW);490 if (!rcdev)491 return -ENOMEM;492 493 if (hardware[type].send_pulse && hardware[type].send_space)494 rcdev->tx_ir = serial_ir_tx;495 if (hardware[type].set_send_carrier)496 rcdev->s_tx_carrier = serial_ir_tx_carrier;497 if (hardware[type].set_duty_cycle)498 rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle;499 500 switch (type) {501 case IR_HOMEBREW:502 rcdev->device_name = "Serial IR type home-brew";503 break;504 case IR_IRDEO:505 rcdev->device_name = "Serial IR type IRdeo";506 break;507 case IR_IRDEO_REMOTE:508 rcdev->device_name = "Serial IR type IRdeo remote";509 break;510 case IR_ANIMAX:511 rcdev->device_name = "Serial IR type AnimaX";512 break;513 case IR_IGOR:514 rcdev->device_name = "Serial IR type IgorPlug";515 break;516 }517 518 rcdev->input_phys = KBUILD_MODNAME "/input0";519 rcdev->input_id.bustype = BUS_HOST;520 rcdev->input_id.vendor = 0x0001;521 rcdev->input_id.product = 0x0001;522 rcdev->input_id.version = 0x0100;523 rcdev->open = serial_ir_open;524 rcdev->close = serial_ir_close;525 rcdev->dev.parent = &serial_ir.pdev->dev;526 rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;527 rcdev->driver_name = KBUILD_MODNAME;528 rcdev->map_name = RC_MAP_RC6_MCE;529 rcdev->min_timeout = 1;530 rcdev->timeout = IR_DEFAULT_TIMEOUT;531 rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;532 rcdev->rx_resolution = 250;533 534 serial_ir.rcdev = rcdev;535 536 timer_setup(&serial_ir.timeout_timer, serial_ir_timeout, 0);537 538 result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler,539 share_irq ? IRQF_SHARED : 0,540 KBUILD_MODNAME, &hardware);541 if (result < 0) {542 if (result == -EBUSY)543 dev_err(&dev->dev, "IRQ %d busy\n", irq);544 else if (result == -EINVAL)545 dev_err(&dev->dev, "Bad irq number or handler\n");546 return result;547 }548 549 /* Reserve io region. */550 if ((iommap &&551 (devm_request_mem_region(&dev->dev, iommap, 8UL << ioshift,552 KBUILD_MODNAME) == NULL)) ||553 (!iommap && (devm_request_region(&dev->dev, io, 8,554 KBUILD_MODNAME) == NULL))) {555 dev_err(&dev->dev, "port %04x already in use\n", io);556 dev_warn(&dev->dev, "use 'setserial /dev/ttySX uart none'\n");557 dev_warn(&dev->dev,558 "or compile the serial port driver as module and\n");559 dev_warn(&dev->dev, "make sure this module is loaded first\n");560 return -EBUSY;561 }562 563 result = hardware_init_port();564 if (result < 0)565 return result;566 567 /* Initialize pulse/space widths */568 serial_ir.duty_cycle = 50;569 serial_ir.carrier = 38000;570 571 /* If pin is high, then this must be an active low receiver. */572 if (sense == -1) {573 /* wait 1/2 sec for the power supply */574 msleep(500);575 576 /*577 * probe 9 times every 0.04s, collect "votes" for578 * active high/low579 */580 nlow = 0;581 nhigh = 0;582 for (i = 0; i < 9; i++) {583 if (sinp(UART_MSR) & hardware[type].signal_pin)584 nlow++;585 else586 nhigh++;587 msleep(40);588 }589 sense = nlow >= nhigh ? 1 : 0;590 dev_info(&dev->dev, "auto-detected active %s receiver\n",591 sense ? "low" : "high");592 } else593 dev_info(&dev->dev, "Manually using active %s receiver\n",594 sense ? "low" : "high");595 596 dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io);597 598 return devm_rc_register_device(&dev->dev, rcdev);599}600 601static int serial_ir_open(struct rc_dev *rcdev)602{603 unsigned long flags;604 605 /* initialize timestamp */606 serial_ir.lastkt = ktime_get();607 608 spin_lock_irqsave(&hardware[type].lock, flags);609 610 /* Set DLAB 0. */611 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));612 613 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);614 615 spin_unlock_irqrestore(&hardware[type].lock, flags);616 617 return 0;618}619 620static void serial_ir_close(struct rc_dev *rcdev)621{622 unsigned long flags;623 624 spin_lock_irqsave(&hardware[type].lock, flags);625 626 /* Set DLAB 0. */627 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));628 629 /* First of all, disable all interrupts */630 soutp(UART_IER, sinp(UART_IER) &631 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));632 spin_unlock_irqrestore(&hardware[type].lock, flags);633}634 635static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,636 unsigned int count)637{638 unsigned long flags;639 ktime_t edge;640 s64 delta;641 int i;642 643 spin_lock_irqsave(&hardware[type].lock, flags);644 if (type == IR_IRDEO) {645 /* DTR, RTS down */646 on();647 }648 649 edge = ktime_get();650 for (i = 0; i < count; i++) {651 if (i % 2)652 hardware[type].send_space();653 else654 hardware[type].send_pulse(txbuf[i], edge);655 656 edge = ktime_add_us(edge, txbuf[i]);657 delta = ktime_us_delta(edge, ktime_get());658 if (delta > 25) {659 spin_unlock_irqrestore(&hardware[type].lock, flags);660 usleep_range(delta - 25, delta + 25);661 spin_lock_irqsave(&hardware[type].lock, flags);662 } else if (delta > 0) {663 udelay(delta);664 }665 }666 off();667 spin_unlock_irqrestore(&hardware[type].lock, flags);668 return count;669}670 671static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle)672{673 serial_ir.duty_cycle = cycle;674 return 0;675}676 677static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier)678{679 if (carrier > 500000 || carrier < 20000)680 return -EINVAL;681 682 serial_ir.carrier = carrier;683 return 0;684}685 686static int serial_ir_suspend(struct platform_device *dev,687 pm_message_t state)688{689 /* Set DLAB 0. */690 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));691 692 /* Disable all interrupts */693 soutp(UART_IER, sinp(UART_IER) &694 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));695 696 /* Clear registers. */697 sinp(UART_LSR);698 sinp(UART_RX);699 sinp(UART_IIR);700 sinp(UART_MSR);701 702 return 0;703}704 705static int serial_ir_resume(struct platform_device *dev)706{707 unsigned long flags;708 int result;709 710 result = hardware_init_port();711 if (result < 0)712 return result;713 714 spin_lock_irqsave(&hardware[type].lock, flags);715 /* Enable Interrupt */716 serial_ir.lastkt = ktime_get();717 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);718 off();719 720 spin_unlock_irqrestore(&hardware[type].lock, flags);721 722 return 0;723}724 725static struct platform_driver serial_ir_driver = {726 .probe = serial_ir_probe,727 .suspend = serial_ir_suspend,728 .resume = serial_ir_resume,729 .driver = {730 .name = "serial_ir",731 },732};733 734static int __init serial_ir_init(void)735{736 int result;737 738 result = platform_driver_register(&serial_ir_driver);739 if (result)740 return result;741 742 serial_ir.pdev = platform_device_alloc("serial_ir", 0);743 if (!serial_ir.pdev) {744 result = -ENOMEM;745 goto exit_driver_unregister;746 }747 748 result = platform_device_add(serial_ir.pdev);749 if (result)750 goto exit_device_put;751 752 return 0;753 754exit_device_put:755 platform_device_put(serial_ir.pdev);756exit_driver_unregister:757 platform_driver_unregister(&serial_ir_driver);758 return result;759}760 761static void serial_ir_exit(void)762{763 platform_device_unregister(serial_ir.pdev);764 platform_driver_unregister(&serial_ir_driver);765}766 767static int __init serial_ir_init_module(void)768{769 switch (type) {770 case IR_HOMEBREW:771 case IR_IRDEO:772 case IR_IRDEO_REMOTE:773 case IR_ANIMAX:774 case IR_IGOR:775 /* if nothing specified, use ttyS0/com1 and irq 4 */776 io = io ? io : 0x3f8;777 irq = irq ? irq : 4;778 break;779 default:780 return -EINVAL;781 }782 if (!softcarrier) {783 switch (type) {784 case IR_HOMEBREW:785 case IR_IGOR:786 hardware[type].set_send_carrier = false;787 hardware[type].set_duty_cycle = false;788 break;789 }790 }791 792 /* make sure sense is either -1, 0, or 1 */793 if (sense != -1)794 sense = !!sense;795 796 return serial_ir_init();797}798 799static void __exit serial_ir_exit_module(void)800{801 del_timer_sync(&serial_ir.timeout_timer);802 serial_ir_exit();803}804 805module_init(serial_ir_init_module);806module_exit(serial_ir_exit_module);807 808MODULE_DESCRIPTION("Infra-red receiver driver for serial ports.");809MODULE_AUTHOR("Ralph Metzler, Trent Piepho, Ben Pfaff, Christoph Bartelmus, Andrei Tanas");810MODULE_LICENSE("GPL");811 812module_param(type, int, 0444);813MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo, 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug");814 815module_param_hw(io, int, ioport, 0444);816MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");817 818/* some architectures (e.g. intel xscale) have memory mapped registers */819module_param_hw(iommap, ulong, other, 0444);820MODULE_PARM_DESC(iommap, "physical base for memory mapped I/O (0 = no memory mapped io)");821 822/*823 * some architectures (e.g. intel xscale) align the 8bit serial registers824 * on 32bit word boundaries.825 * See linux-kernel/drivers/tty/serial/8250/8250.c serial_in()/out()826 */827module_param_hw(ioshift, int, other, 0444);828MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)");829 830module_param_hw(irq, int, irq, 0444);831MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");832 833module_param_hw(share_irq, bool, other, 0444);834MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)");835 836module_param(sense, int, 0444);837MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit (0 = active high, 1 = active low )");838 839#ifdef CONFIG_IR_SERIAL_TRANSMITTER840module_param(txsense, bool, 0444);841MODULE_PARM_DESC(txsense, "Sense of transmitter circuit (0 = active high, 1 = active low )");842#endif843 844module_param(softcarrier, bool, 0444);845MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");846