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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / rc / serial_ir.c
blob436bd58b5f05f252098ec433ac7305feb033034e
1 /*
2 * serial_ir.c
3 *
4 * serial_ir - Device driver that records pulse- and pause-lengths
5 * (space-lengths) between DDCD event on a serial port.
6 *
7 * Copyright (C) 1996,97 Ralph Metzler <rjkm@thp.uni-koeln.de>
8 * Copyright (C) 1998 Trent Piepho <xyzzy@u.washington.edu>
9 * Copyright (C) 1998 Ben Pfaff <blp@gnu.org>
10 * Copyright (C) 1999 Christoph Bartelmus <lirc@bartelmus.de>
11 * Copyright (C) 2007 Andrei Tanas <andrei@tanas.ca> (suspend/resume support)
12 * Copyright (C) 2016 Sean Young <sean@mess.org> (port to rc-core)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 */
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #include <linux/module.h>
27 #include <linux/errno.h>
28 #include <linux/interrupt.h>
29 #include <linux/kernel.h>
30 #include <linux/serial_reg.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/platform_device.h>
34 #include <linux/spinlock.h>
35 #include <media/rc-core.h>
36
37 struct serial_ir_hw {
38 int signal_pin;
39 int signal_pin_change;
40 u8 on;
41 u8 off;
42 unsigned set_send_carrier:1;
43 unsigned set_duty_cycle:1;
44 void (*send_pulse)(unsigned int length, ktime_t edge);
45 void (*send_space)(void);
46 spinlock_t lock;
47 };
48
49 #define IR_HOMEBREW 0
50 #define IR_IRDEO 1
51 #define IR_IRDEO_REMOTE 2
52 #define IR_ANIMAX 3
53 #define IR_IGOR 4
54
55 /* module parameters */
56 static int type;
57 static int io;
58 static int irq;
59 static bool iommap;
60 static int ioshift;
61 static bool softcarrier = true;
62 static bool share_irq;
63 static int sense = -1; /* -1 = auto, 0 = active high, 1 = active low */
64 static bool txsense; /* 0 = active high, 1 = active low */
65
66 /* forward declarations */
67 static void send_pulse_irdeo(unsigned int length, ktime_t edge);
68 static void send_space_irdeo(void);
69 #ifdef CONFIG_IR_SERIAL_TRANSMITTER
70 static void send_pulse_homebrew(unsigned int length, ktime_t edge);
71 static void send_space_homebrew(void);
72 #endif
73
74 static struct serial_ir_hw hardware[] = {
75 [IR_HOMEBREW] = {
76 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_HOMEBREW].lock),
77 .signal_pin = UART_MSR_DCD,
78 .signal_pin_change = UART_MSR_DDCD,
79 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),
80 .off = (UART_MCR_RTS | UART_MCR_OUT2),
81 #ifdef CONFIG_IR_SERIAL_TRANSMITTER
82 .send_pulse = send_pulse_homebrew,
83 .send_space = send_space_homebrew,
84 .set_send_carrier = true,
85 .set_duty_cycle = true,
86 #endif
87 },
88
89 [IR_IRDEO] = {
90 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO].lock),
91 .signal_pin = UART_MSR_DSR,
92 .signal_pin_change = UART_MSR_DDSR,
93 .on = UART_MCR_OUT2,
94 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
95 .send_pulse = send_pulse_irdeo,
96 .send_space = send_space_irdeo,
97 .set_duty_cycle = true,
98 },
99
100 [IR_IRDEO_REMOTE] = {
101 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO_REMOTE].lock),
102 .signal_pin = UART_MSR_DSR,
103 .signal_pin_change = UART_MSR_DDSR,
104 .on = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
105 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
106 .send_pulse = send_pulse_irdeo,
107 .send_space = send_space_irdeo,
108 .set_duty_cycle = true,
109 },
110
111 [IR_ANIMAX] = {
112 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_ANIMAX].lock),
113 .signal_pin = UART_MSR_DCD,
114 .signal_pin_change = UART_MSR_DDCD,
115 .on = 0,
116 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2),
117 },
118
119 [IR_IGOR] = {
120 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IGOR].lock),
121 .signal_pin = UART_MSR_DSR,
122 .signal_pin_change = UART_MSR_DDSR,
123 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR),
124 .off = (UART_MCR_RTS | UART_MCR_OUT2),
125 #ifdef CONFIG_IR_SERIAL_TRANSMITTER
126 .send_pulse = send_pulse_homebrew,
127 .send_space = send_space_homebrew,
128 .set_send_carrier = true,
129 .set_duty_cycle = true,
130 #endif
131 },
132 };
133
134 #define RS_ISR_PASS_LIMIT 256
135
136 struct serial_ir {
137 ktime_t lastkt;
138 struct rc_dev *rcdev;
139 struct platform_device *pdev;
140
141 unsigned int freq;
142 unsigned int duty_cycle;
143
144 unsigned int pulse_width, space_width;
145 };
146
147 static struct serial_ir serial_ir;
148
149 /* fetch serial input packet (1 byte) from register offset */
150 static u8 sinp(int offset)
151 {
152 if (iommap)
153 /* the register is memory-mapped */
154 offset <<= ioshift;
155
156 return inb(io + offset);
157 }
158
159 /* write serial output packet (1 byte) of value to register offset */
160 static void soutp(int offset, u8 value)
161 {
162 if (iommap)
163 /* the register is memory-mapped */
164 offset <<= ioshift;
165
166 outb(value, io + offset);
167 }
168
169 static void on(void)
170 {
171 if (txsense)
172 soutp(UART_MCR, hardware[type].off);
173 else
174 soutp(UART_MCR, hardware[type].on);
175 }
176
177 static void off(void)
178 {
179 if (txsense)
180 soutp(UART_MCR, hardware[type].on);
181 else
182 soutp(UART_MCR, hardware[type].off);
183 }
184
185 static void init_timing_params(unsigned int new_duty_cycle,
186 unsigned int new_freq)
187 {
188 serial_ir.duty_cycle = new_duty_cycle;
189 serial_ir.freq = new_freq;
190
191 serial_ir.pulse_width = DIV_ROUND_CLOSEST(
192 new_duty_cycle * NSEC_PER_SEC, new_freq * 100l);
193 serial_ir.space_width = DIV_ROUND_CLOSEST(
194 (100l - new_duty_cycle) * NSEC_PER_SEC, new_freq * 100l);
195 }
196
197 static void send_pulse_irdeo(unsigned int length, ktime_t target)
198 {
199 long rawbits;
200 int i;
201 unsigned char output;
202 unsigned char chunk, shifted;
203
204 /* how many bits have to be sent ? */
205 rawbits = length * 1152 / 10000;
206 if (serial_ir.duty_cycle > 50)
207 chunk = 3;
208 else
209 chunk = 1;
210 for (i = 0, output = 0x7f; rawbits > 0; rawbits -= 3) {
211 shifted = chunk << (i * 3);
212 shifted >>= 1;
213 output &= (~shifted);
214 i++;
215 if (i == 3) {
216 soutp(UART_TX, output);
217 while (!(sinp(UART_LSR) & UART_LSR_THRE))
218 ;
219 output = 0x7f;
220 i = 0;
221 }
222 }
223 if (i != 0) {
224 soutp(UART_TX, output);
225 while (!(sinp(UART_LSR) & UART_LSR_TEMT))
226 ;
227 }
228 }
229
230 static void send_space_irdeo(void)
231 {
232 }
233
234 #ifdef CONFIG_IR_SERIAL_TRANSMITTER
235 static void send_pulse_homebrew_softcarrier(unsigned int length, ktime_t edge)
236 {
237 ktime_t now, target = ktime_add_us(edge, length);
238 /*
239 * delta should never exceed 4 seconds and on m68k
240 * ndelay(s64) does not compile; so use s32 rather than s64.
241 */
242 s32 delta;
243
244 for (;;) {
245 now = ktime_get();
246 if (ktime_compare(now, target) >= 0)
247 break;
248 on();
249 edge = ktime_add_ns(edge, serial_ir.pulse_width);
250 delta = ktime_to_ns(ktime_sub(edge, now));
251 if (delta > 0)
252 ndelay(delta);
253 now = ktime_get();
254 off();
255 if (ktime_compare(now, target) >= 0)
256 break;
257 edge = ktime_add_ns(edge, serial_ir.space_width);
258 delta = ktime_to_ns(ktime_sub(edge, now));
259 if (delta > 0)
260 ndelay(delta);
261 }
262 }
263
264 static void send_pulse_homebrew(unsigned int length, ktime_t edge)
265 {
266 if (softcarrier)
267 send_pulse_homebrew_softcarrier(length, edge);
268 else
269 on();
270 }
271
272 static void send_space_homebrew(void)
273 {
274 off();
275 }
276 #endif
277
278 static void frbwrite(unsigned int l, bool is_pulse)
279 {
280 /* simple noise filter */
281 static unsigned int ptr, pulse, space;
282 DEFINE_IR_RAW_EVENT(ev);
283
284 if (ptr > 0 && is_pulse) {
285 pulse += l;
286 if (pulse > 250000) {
287 ev.duration = space;
288 ev.pulse = false;
289 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
290 ev.duration = pulse;
291 ev.pulse = true;
292 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
293 ptr = 0;
294 pulse = 0;
295 }
296 return;
297 }
298 if (!is_pulse) {
299 if (ptr == 0) {
300 if (l > 20000000) {
301 space = l;
302 ptr++;
303 return;
304 }
305 } else {
306 if (l > 20000000) {
307 space += pulse;
308 if (space > IR_MAX_DURATION)
309 space = IR_MAX_DURATION;
310 space += l;
311 if (space > IR_MAX_DURATION)
312 space = IR_MAX_DURATION;
313 pulse = 0;
314 return;
315 }
316
317 ev.duration = space;
318 ev.pulse = false;
319 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
320 ev.duration = pulse;
321 ev.pulse = true;
322 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
323 ptr = 0;
324 pulse = 0;
325 }
326 }
327
328 ev.duration = l;
329 ev.pulse = is_pulse;
330 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev);
331 }
332
333 static irqreturn_t serial_ir_irq_handler(int i, void *blah)
334 {
335 ktime_t kt;
336 int counter, dcd;
337 u8 status;
338 ktime_t delkt;
339 unsigned int data;
340 static int last_dcd = -1;
341
342 if ((sinp(UART_IIR) & UART_IIR_NO_INT)) {
343 /* not our interrupt */
344 return IRQ_NONE;
345 }
346
347 counter = 0;
348 do {
349 counter++;
350 status = sinp(UART_MSR);
351 if (counter > RS_ISR_PASS_LIMIT) {
352 dev_err(&serial_ir.pdev->dev, "Trapped in interrupt");
353 break;
354 }
355 if ((status & hardware[type].signal_pin_change) &&
356 sense != -1) {
357 /* get current time */
358 kt = ktime_get();
359
360 /*
361 * The driver needs to know if your receiver is
362 * active high or active low, or the space/pulse
363 * sense could be inverted.
364 */
365
366 /* calc time since last interrupt in nanoseconds */
367 dcd = (status & hardware[type].signal_pin) ? 1 : 0;
368
369 if (dcd == last_dcd) {
370 dev_err(&serial_ir.pdev->dev,
371 "ignoring spike: %d %d %lldns %lldns\n",
372 dcd, sense, ktime_to_ns(kt),
373 ktime_to_ns(serial_ir.lastkt));
374 continue;
375 }
376
377 delkt = ktime_sub(kt, serial_ir.lastkt);
378 if (ktime_compare(delkt, ktime_set(15, 0)) > 0) {
379 data = IR_MAX_DURATION; /* really long time */
380 if (!(dcd ^ sense)) {
381 /* sanity check */
382 dev_err(&serial_ir.pdev->dev,
383 "dcd unexpected: %d %d %lldns %lldns\n",
384 dcd, sense, ktime_to_ns(kt),
385 ktime_to_ns(serial_ir.lastkt));
386 /*
387 * detecting pulse while this
388 * MUST be a space!
389 */
390 sense = sense ? 0 : 1;
391 }
392 } else {
393 data = ktime_to_ns(delkt);
394 }
395 frbwrite(data, !(dcd ^ sense));
396 serial_ir.lastkt = kt;
397 last_dcd = dcd;
398 ir_raw_event_handle(serial_ir.rcdev);
399 }
400 } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */
401 return IRQ_HANDLED;
402 }
403
404 static int hardware_init_port(void)
405 {
406 u8 scratch, scratch2, scratch3;
407
408 /*
409 * This is a simple port existence test, borrowed from the autoconfig
410 * function in drivers/tty/serial/8250/8250_port.c
411 */
412 scratch = sinp(UART_IER);
413 soutp(UART_IER, 0);
414 #ifdef __i386__
415 outb(0xff, 0x080);
416 #endif
417 scratch2 = sinp(UART_IER) & 0x0f;
418 soutp(UART_IER, 0x0f);
419 #ifdef __i386__
420 outb(0x00, 0x080);
421 #endif
422 scratch3 = sinp(UART_IER) & 0x0f;
423 soutp(UART_IER, scratch);
424 if (scratch2 != 0 || scratch3 != 0x0f) {
425 /* we fail, there's nothing here */
426 pr_err("port existence test failed, cannot continue\n");
427 return -ENODEV;
428 }
429
430 /* Set DLAB 0. */
431 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
432
433 /* First of all, disable all interrupts */
434 soutp(UART_IER, sinp(UART_IER) &
435 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
436
437 /* Clear registers. */
438 sinp(UART_LSR);
439 sinp(UART_RX);
440 sinp(UART_IIR);
441 sinp(UART_MSR);
442
443 /* Set line for power source */
444 off();
445
446 /* Clear registers again to be sure. */
447 sinp(UART_LSR);
448 sinp(UART_RX);
449 sinp(UART_IIR);
450 sinp(UART_MSR);
451
452 switch (type) {
453 case IR_IRDEO:
454 case IR_IRDEO_REMOTE:
455 /* setup port to 7N1 @ 115200 Baud */
456 /* 7N1+start = 9 bits at 115200 ~ 3 bits at 38kHz */
457
458 /* Set DLAB 1. */
459 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
460 /* Set divisor to 1 => 115200 Baud */
461 soutp(UART_DLM, 0);
462 soutp(UART_DLL, 1);
463 /* Set DLAB 0 + 7N1 */
464 soutp(UART_LCR, UART_LCR_WLEN7);
465 /* THR interrupt already disabled at this point */
466 break;
467 default:
468 break;
469 }
470
471 return 0;
472 }
473
474 static int serial_ir_probe(struct platform_device *dev)
475 {
476 int i, nlow, nhigh, result;
477
478 result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler,
479 share_irq ? IRQF_SHARED : 0,
480 KBUILD_MODNAME, &hardware);
481 if (result < 0) {
482 if (result == -EBUSY)
483 dev_err(&dev->dev, "IRQ %d busy\n", irq);
484 else if (result == -EINVAL)
485 dev_err(&dev->dev, "Bad irq number or handler\n");
486 return result;
487 }
488
489 /* Reserve io region. */
490 if ((iommap &&
491 (devm_request_mem_region(&dev->dev, iommap, 8 << ioshift,
492 KBUILD_MODNAME) == NULL)) ||
493 (!iommap && (devm_request_region(&dev->dev, io, 8,
494 KBUILD_MODNAME) == NULL))) {
495 dev_err(&dev->dev, "port %04x already in use\n", io);
496 dev_warn(&dev->dev, "use 'setserial /dev/ttySX uart none'\n");
497 dev_warn(&dev->dev,
498 "or compile the serial port driver as module and\n");
499 dev_warn(&dev->dev, "make sure this module is loaded first\n");
500 return -EBUSY;
501 }
502
503 result = hardware_init_port();
504 if (result < 0)
505 return result;
506
507 /* Initialize pulse/space widths */
508 init_timing_params(50, 38000);
509
510 /* If pin is high, then this must be an active low receiver. */
511 if (sense == -1) {
512 /* wait 1/2 sec for the power supply */
513 msleep(500);
514
515 /*
516 * probe 9 times every 0.04s, collect "votes" for
517 * active high/low
518 */
519 nlow = 0;
520 nhigh = 0;
521 for (i = 0; i < 9; i++) {
522 if (sinp(UART_MSR) & hardware[type].signal_pin)
523 nlow++;
524 else
525 nhigh++;
526 msleep(40);
527 }
528 sense = nlow >= nhigh ? 1 : 0;
529 dev_info(&dev->dev, "auto-detected active %s receiver\n",
530 sense ? "low" : "high");
531 } else
532 dev_info(&dev->dev, "Manually using active %s receiver\n",
533 sense ? "low" : "high");
534
535 dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io);
536 return 0;
537 }
538
539 static int serial_ir_open(struct rc_dev *rcdev)
540 {
541 unsigned long flags;
542
543 /* initialize timestamp */
544 serial_ir.lastkt = ktime_get();
545
546 spin_lock_irqsave(&hardware[type].lock, flags);
547
548 /* Set DLAB 0. */
549 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
550
551 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);
552
553 spin_unlock_irqrestore(&hardware[type].lock, flags);
554
555 return 0;
556 }
557
558 static void serial_ir_close(struct rc_dev *rcdev)
559 {
560 unsigned long flags;
561
562 spin_lock_irqsave(&hardware[type].lock, flags);
563
564 /* Set DLAB 0. */
565 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
566
567 /* First of all, disable all interrupts */
568 soutp(UART_IER, sinp(UART_IER) &
569 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
570 spin_unlock_irqrestore(&hardware[type].lock, flags);
571 }
572
573 static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
574 unsigned int count)
575 {
576 unsigned long flags;
577 ktime_t edge;
578 s64 delta;
579 int i;
580
581 spin_lock_irqsave(&hardware[type].lock, flags);
582 if (type == IR_IRDEO) {
583 /* DTR, RTS down */
584 on();
585 }
586
587 edge = ktime_get();
588 for (i = 0; i < count; i++) {
589 if (i % 2)
590 hardware[type].send_space();
591 else
592 hardware[type].send_pulse(txbuf[i], edge);
593
594 edge = ktime_add_us(edge, txbuf[i]);
595 delta = ktime_us_delta(edge, ktime_get());
596 if (delta > 25) {
597 spin_unlock_irqrestore(&hardware[type].lock, flags);
598 usleep_range(delta - 25, delta + 25);
599 spin_lock_irqsave(&hardware[type].lock, flags);
600 } else if (delta > 0) {
601 udelay(delta);
602 }
603 }
604 off();
605 spin_unlock_irqrestore(&hardware[type].lock, flags);
606 return count;
607 }
608
609 static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle)
610 {
611 init_timing_params(cycle, serial_ir.freq);
612 return 0;
613 }
614
615 static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier)
616 {
617 if (carrier > 500000 || carrier < 20000)
618 return -EINVAL;
619
620 init_timing_params(serial_ir.duty_cycle, carrier);
621 return 0;
622 }
623
624 static int serial_ir_suspend(struct platform_device *dev,
625 pm_message_t state)
626 {
627 /* Set DLAB 0. */
628 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
629
630 /* Disable all interrupts */
631 soutp(UART_IER, sinp(UART_IER) &
632 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI)));
633
634 /* Clear registers. */
635 sinp(UART_LSR);
636 sinp(UART_RX);
637 sinp(UART_IIR);
638 sinp(UART_MSR);
639
640 return 0;
641 }
642
643 static int serial_ir_resume(struct platform_device *dev)
644 {
645 unsigned long flags;
646 int result;
647
648 result = hardware_init_port();
649 if (result < 0)
650 return result;
651
652 spin_lock_irqsave(&hardware[type].lock, flags);
653 /* Enable Interrupt */
654 serial_ir.lastkt = ktime_get();
655 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI);
656 off();
657
658 spin_unlock_irqrestore(&hardware[type].lock, flags);
659
660 return 0;
661 }
662
663 static struct platform_driver serial_ir_driver = {
664 .probe = serial_ir_probe,
665 .suspend = serial_ir_suspend,
666 .resume = serial_ir_resume,
667 .driver = {
668 .name = "serial_ir",
669 },
670 };
671
672 static int __init serial_ir_init(void)
673 {
674 int result;
675
676 result = platform_driver_register(&serial_ir_driver);
677 if (result)
678 return result;
679
680 serial_ir.pdev = platform_device_alloc("serial_ir", 0);
681 if (!serial_ir.pdev) {
682 result = -ENOMEM;
683 goto exit_driver_unregister;
684 }
685
686 result = platform_device_add(serial_ir.pdev);
687 if (result)
688 goto exit_device_put;
689
690 return 0;
691
692 exit_device_put:
693 platform_device_put(serial_ir.pdev);
694 exit_driver_unregister:
695 platform_driver_unregister(&serial_ir_driver);
696 return result;
697 }
698
699 static void serial_ir_exit(void)
700 {
701 platform_device_unregister(serial_ir.pdev);
702 platform_driver_unregister(&serial_ir_driver);
703 }
704
705 static int __init serial_ir_init_module(void)
706 {
707 struct rc_dev *rcdev;
708 int result;
709
710 switch (type) {
711 case IR_HOMEBREW:
712 case IR_IRDEO:
713 case IR_IRDEO_REMOTE:
714 case IR_ANIMAX:
715 case IR_IGOR:
716 /* if nothing specified, use ttyS0/com1 and irq 4 */
717 io = io ? io : 0x3f8;
718 irq = irq ? irq : 4;
719 break;
720 default:
721 return -EINVAL;
722 }
723 if (!softcarrier) {
724 switch (type) {
725 case IR_HOMEBREW:
726 case IR_IGOR:
727 hardware[type].set_send_carrier = false;
728 hardware[type].set_duty_cycle = false;
729 break;
730 }
731 }
732
733 /* make sure sense is either -1, 0, or 1 */
734 if (sense != -1)
735 sense = !!sense;
736
737 result = serial_ir_init();
738 if (result)
739 return result;
740
741 rcdev = devm_rc_allocate_device(&serial_ir.pdev->dev);
742 if (!rcdev) {
743 result = -ENOMEM;
744 goto serial_cleanup;
745 }
746
747 if (hardware[type].send_pulse && hardware[type].send_space)
748 rcdev->tx_ir = serial_ir_tx;
749 if (hardware[type].set_send_carrier)
750 rcdev->s_tx_carrier = serial_ir_tx_carrier;
751 if (hardware[type].set_duty_cycle)
752 rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle;
753
754 switch (type) {
755 case IR_HOMEBREW:
756 rcdev->input_name = "Serial IR type home-brew";
757 break;
758 case IR_IRDEO:
759 rcdev->input_name = "Serial IR type IRdeo";
760 break;
761 case IR_IRDEO_REMOTE:
762 rcdev->input_name = "Serial IR type IRdeo remote";
763 break;
764 case IR_ANIMAX:
765 rcdev->input_name = "Serial IR type AnimaX";
766 break;
767 case IR_IGOR:
768 rcdev->input_name = "Serial IR type IgorPlug";
769 break;
770 }
771
772 rcdev->input_phys = KBUILD_MODNAME "/input0";
773 rcdev->input_id.bustype = BUS_HOST;
774 rcdev->input_id.vendor = 0x0001;
775 rcdev->input_id.product = 0x0001;
776 rcdev->input_id.version = 0x0100;
777 rcdev->open = serial_ir_open;
778 rcdev->close = serial_ir_close;
779 rcdev->dev.parent = &serial_ir.pdev->dev;
780 rcdev->driver_type = RC_DRIVER_IR_RAW;
781 rcdev->allowed_protocols = RC_BIT_ALL;
782 rcdev->driver_name = KBUILD_MODNAME;
783 rcdev->map_name = RC_MAP_RC6_MCE;
784 rcdev->timeout = IR_DEFAULT_TIMEOUT;
785 rcdev->rx_resolution = 250000;
786
787 serial_ir.rcdev = rcdev;
788
789 result = rc_register_device(rcdev);
790
791 if (!result)
792 return 0;
793 serial_cleanup:
794 serial_ir_exit();
795 return result;
796 }
797
798 static void __exit serial_ir_exit_module(void)
799 {
800 rc_unregister_device(serial_ir.rcdev);
801 serial_ir_exit();
802 }
803
804 module_init(serial_ir_init_module);
805 module_exit(serial_ir_exit_module);
806
807 MODULE_DESCRIPTION("Infra-red receiver driver for serial ports.");
808 MODULE_AUTHOR("Ralph Metzler, Trent Piepho, Ben Pfaff, Christoph Bartelmus, Andrei Tanas");
809 MODULE_LICENSE("GPL");
810
811 module_param(type, int, 0444);
812 MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo, 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug");
813
814 module_param(io, int, 0444);
815 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
816
817 /* some architectures (e.g. intel xscale) have memory mapped registers */
818 module_param(iommap, bool, 0444);
819 MODULE_PARM_DESC(iommap, "physical base for memory mapped I/O (0 = no memory mapped io)");
820
821 /*
822 * some architectures (e.g. intel xscale) align the 8bit serial registers
823 * on 32bit word boundaries.
824 * See linux-kernel/drivers/tty/serial/8250/8250.c serial_in()/out()
825 */
826 module_param(ioshift, int, 0444);
827 MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)");
828
829 module_param(irq, int, 0444);
830 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
831
832 module_param(share_irq, bool, 0444);
833 MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)");
834
835 module_param(sense, int, 0444);
836 MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit (0 = active high, 1 = active low )");
837
838 #ifdef CONFIG_IR_SERIAL_TRANSMITTER
839 module_param(txsense, bool, 0444);
840 MODULE_PARM_DESC(txsense, "Sense of transmitter circuit (0 = active high, 1 = active low )");
841 #endif
842
843 module_param(softcarrier, bool, 0444);
844 MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
Linux with added FPC-III support