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[mirror_ubuntu-artful-kernel.git] / drivers / staging / media / lirc / lirc_sir.c
1 /*
2 * LIRC SIR driver, (C) 2000 Milan Pikula <www@fornax.sk>
3 *
4 * lirc_sir - Device driver for use with SIR (serial infra red)
5 * mode of IrDA on many notebooks.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 *
22 * 2000/09/16 Frank Przybylski <mail@frankprzybylski.de> :
23 * added timeout and relaxed pulse detection, removed gap bug
24 *
25 * 2000/12/15 Christoph Bartelmus <lirc@bartelmus.de> :
26 * added support for Tekram Irmate 210 (sending does not work yet,
27 * kind of disappointing that nobody was able to implement that
28 * before),
29 * major clean-up
30 *
31 * 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
32 * added support for StrongARM SA1100 embedded microprocessor
33 * parts cut'n'pasted from sa1100_ir.c (C) 2000 Russell King
34 */
35
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
37
38 #include <linux/module.h>
39 #include <linux/sched.h>
40 #include <linux/errno.h>
41 #include <linux/signal.h>
42 #include <linux/fs.h>
43 #include <linux/interrupt.h>
44 #include <linux/ioport.h>
45 #include <linux/kernel.h>
46 #include <linux/serial_reg.h>
47 #include <linux/ktime.h>
48 #include <linux/string.h>
49 #include <linux/types.h>
50 #include <linux/wait.h>
51 #include <linux/mm.h>
52 #include <linux/delay.h>
53 #include <linux/poll.h>
54 #include <linux/io.h>
55 #include <asm/irq.h>
56 #include <linux/fcntl.h>
57 #include <linux/platform_device.h>
58
59 #include <linux/timer.h>
60
61 #include <media/lirc.h>
62 #include <media/lirc_dev.h>
63
64 /* SECTION: Definitions */
65
66 /*** Tekram dongle ***/
67 #ifdef LIRC_SIR_TEKRAM
68 /* stolen from kernel source */
69 /* definitions for Tekram dongle */
70 #define TEKRAM_115200 0x00
71 #define TEKRAM_57600 0x01
72 #define TEKRAM_38400 0x02
73 #define TEKRAM_19200 0x03
74 #define TEKRAM_9600 0x04
75 #define TEKRAM_2400 0x08
76
77 #define TEKRAM_PW 0x10 /* Pulse select bit */
78
79 /* 10bit * 1s/115200bit in milliseconds = 87ms*/
80 #define TIME_CONST (10000000ul/115200ul)
81
82 #endif
83
84 #ifdef LIRC_SIR_ACTISYS_ACT200L
85 static void init_act200(void);
86 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
87 static void init_act220(void);
88 #endif
89
90 #define RBUF_LEN 1024
91 #define WBUF_LEN 1024
92
93 #define LIRC_DRIVER_NAME "lirc_sir"
94
95 #define PULSE '['
96
97 #ifndef LIRC_SIR_TEKRAM
98 /* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
99 #define TIME_CONST (9000000ul/115200ul)
100 #endif
101
102
103 /* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
104 #define SIR_TIMEOUT (HZ*5/100)
105
106 #ifndef LIRC_ON_SA1100
107 #ifndef LIRC_IRQ
108 #define LIRC_IRQ 4
109 #endif
110 #ifndef LIRC_PORT
111 /* for external dongles, default to com1 */
112 #if defined(LIRC_SIR_ACTISYS_ACT200L) || \
113 defined(LIRC_SIR_ACTISYS_ACT220L) || \
114 defined(LIRC_SIR_TEKRAM)
115 #define LIRC_PORT 0x3f8
116 #else
117 /* onboard sir ports are typically com3 */
118 #define LIRC_PORT 0x3e8
119 #endif
120 #endif
121
122 static int io = LIRC_PORT;
123 static int irq = LIRC_IRQ;
124 static int threshold = 3;
125 #endif
126
127 static DEFINE_SPINLOCK(timer_lock);
128 static struct timer_list timerlist;
129 /* time of last signal change detected */
130 static ktime_t last;
131 /* time of last UART data ready interrupt */
132 static ktime_t last_intr_time;
133 static int last_value;
134
135 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
136
137 static DEFINE_SPINLOCK(hardware_lock);
138
139 static int rx_buf[RBUF_LEN];
140 static unsigned int rx_tail, rx_head;
141
142 static bool debug;
143
144 /* SECTION: Prototypes */
145
146 /* Communication with user-space */
147 static unsigned int lirc_poll(struct file *file, poll_table *wait);
148 static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
149 loff_t *ppos);
150 static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
151 loff_t *pos);
152 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
153 static void add_read_queue(int flag, unsigned long val);
154 static int init_chrdev(void);
155 static void drop_chrdev(void);
156 /* Hardware */
157 static irqreturn_t sir_interrupt(int irq, void *dev_id);
158 static void send_space(unsigned long len);
159 static void send_pulse(unsigned long len);
160 static int init_hardware(void);
161 static void drop_hardware(void);
162 /* Initialisation */
163 static int init_port(void);
164 static void drop_port(void);
165
166 static inline unsigned int sinp(int offset)
167 {
168 return inb(io + offset);
169 }
170
171 static inline void soutp(int offset, int value)
172 {
173 outb(value, io + offset);
174 }
175
176 #ifndef MAX_UDELAY_MS
177 #define MAX_UDELAY_US 5000
178 #else
179 #define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
180 #endif
181
182 static void safe_udelay(unsigned long usecs)
183 {
184 while (usecs > MAX_UDELAY_US) {
185 udelay(MAX_UDELAY_US);
186 usecs -= MAX_UDELAY_US;
187 }
188 udelay(usecs);
189 }
190
191 /* SECTION: Communication with user-space */
192
193 static unsigned int lirc_poll(struct file *file, poll_table *wait)
194 {
195 poll_wait(file, &lirc_read_queue, wait);
196 if (rx_head != rx_tail)
197 return POLLIN | POLLRDNORM;
198 return 0;
199 }
200
201 static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
202 loff_t *ppos)
203 {
204 int n = 0;
205 int retval = 0;
206 DECLARE_WAITQUEUE(wait, current);
207
208 if (count % sizeof(int))
209 return -EINVAL;
210
211 add_wait_queue(&lirc_read_queue, &wait);
212 set_current_state(TASK_INTERRUPTIBLE);
213 while (n < count) {
214 if (rx_head != rx_tail) {
215 if (copy_to_user(buf + n,
216 rx_buf + rx_head,
217 sizeof(int))) {
218 retval = -EFAULT;
219 break;
220 }
221 rx_head = (rx_head + 1) & (RBUF_LEN - 1);
222 n += sizeof(int);
223 } else {
224 if (file->f_flags & O_NONBLOCK) {
225 retval = -EAGAIN;
226 break;
227 }
228 if (signal_pending(current)) {
229 retval = -ERESTARTSYS;
230 break;
231 }
232 schedule();
233 set_current_state(TASK_INTERRUPTIBLE);
234 }
235 }
236 remove_wait_queue(&lirc_read_queue, &wait);
237 set_current_state(TASK_RUNNING);
238 return n ? n : retval;
239 }
240 static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
241 loff_t *pos)
242 {
243 unsigned long flags;
244 int i, count;
245 int *tx_buf;
246
247 count = n / sizeof(int);
248 if (n % sizeof(int) || count % 2 == 0)
249 return -EINVAL;
250 tx_buf = memdup_user(buf, n);
251 if (IS_ERR(tx_buf))
252 return PTR_ERR(tx_buf);
253 i = 0;
254 local_irq_save(flags);
255 while (1) {
256 if (i >= count)
257 break;
258 if (tx_buf[i])
259 send_pulse(tx_buf[i]);
260 i++;
261 if (i >= count)
262 break;
263 if (tx_buf[i])
264 send_space(tx_buf[i]);
265 i++;
266 }
267 local_irq_restore(flags);
268 kfree(tx_buf);
269 return count;
270 }
271
272 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
273 {
274 u32 __user *uptr = (u32 __user *)arg;
275 int retval = 0;
276 u32 value = 0;
277
278 if (cmd == LIRC_GET_FEATURES)
279 value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
280 else if (cmd == LIRC_GET_SEND_MODE)
281 value = LIRC_MODE_PULSE;
282 else if (cmd == LIRC_GET_REC_MODE)
283 value = LIRC_MODE_MODE2;
284
285 switch (cmd) {
286 case LIRC_GET_FEATURES:
287 case LIRC_GET_SEND_MODE:
288 case LIRC_GET_REC_MODE:
289 retval = put_user(value, uptr);
290 break;
291
292 case LIRC_SET_SEND_MODE:
293 case LIRC_SET_REC_MODE:
294 retval = get_user(value, uptr);
295 break;
296 default:
297 retval = -ENOIOCTLCMD;
298
299 }
300
301 if (retval)
302 return retval;
303 if (cmd == LIRC_SET_REC_MODE) {
304 if (value != LIRC_MODE_MODE2)
305 retval = -ENOSYS;
306 } else if (cmd == LIRC_SET_SEND_MODE) {
307 if (value != LIRC_MODE_PULSE)
308 retval = -ENOSYS;
309 }
310
311 return retval;
312 }
313
314 static void add_read_queue(int flag, unsigned long val)
315 {
316 unsigned int new_rx_tail;
317 int newval;
318
319 pr_debug("add flag %d with val %lu\n", flag, val);
320
321 newval = val & PULSE_MASK;
322
323 /*
324 * statistically, pulses are ~TIME_CONST/2 too long. we could
325 * maybe make this more exact, but this is good enough
326 */
327 if (flag) {
328 /* pulse */
329 if (newval > TIME_CONST/2)
330 newval -= TIME_CONST/2;
331 else /* should not ever happen */
332 newval = 1;
333 newval |= PULSE_BIT;
334 } else {
335 newval += TIME_CONST/2;
336 }
337 new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
338 if (new_rx_tail == rx_head) {
339 pr_debug("Buffer overrun.\n");
340 return;
341 }
342 rx_buf[rx_tail] = newval;
343 rx_tail = new_rx_tail;
344 wake_up_interruptible(&lirc_read_queue);
345 }
346
347 static const struct file_operations lirc_fops = {
348 .owner = THIS_MODULE,
349 .read = lirc_read,
350 .write = lirc_write,
351 .poll = lirc_poll,
352 .unlocked_ioctl = lirc_ioctl,
353 #ifdef CONFIG_COMPAT
354 .compat_ioctl = lirc_ioctl,
355 #endif
356 .open = lirc_dev_fop_open,
357 .release = lirc_dev_fop_close,
358 .llseek = no_llseek,
359 };
360
361 static int set_use_inc(void *data)
362 {
363 return 0;
364 }
365
366 static void set_use_dec(void *data)
367 {
368 }
369
370 static struct lirc_driver driver = {
371 .name = LIRC_DRIVER_NAME,
372 .minor = -1,
373 .code_length = 1,
374 .sample_rate = 0,
375 .data = NULL,
376 .add_to_buf = NULL,
377 .set_use_inc = set_use_inc,
378 .set_use_dec = set_use_dec,
379 .fops = &lirc_fops,
380 .dev = NULL,
381 .owner = THIS_MODULE,
382 };
383
384 static struct platform_device *lirc_sir_dev;
385
386 static int init_chrdev(void)
387 {
388 driver.dev = &lirc_sir_dev->dev;
389 driver.minor = lirc_register_driver(&driver);
390 if (driver.minor < 0) {
391 pr_err("init_chrdev() failed.\n");
392 return -EIO;
393 }
394 return 0;
395 }
396
397 static void drop_chrdev(void)
398 {
399 lirc_unregister_driver(driver.minor);
400 }
401
402 /* SECTION: Hardware */
403 static void sir_timeout(unsigned long data)
404 {
405 /*
406 * if last received signal was a pulse, but receiving stopped
407 * within the 9 bit frame, we need to finish this pulse and
408 * simulate a signal change to from pulse to space. Otherwise
409 * upper layers will receive two sequences next time.
410 */
411
412 unsigned long flags;
413 unsigned long pulse_end;
414
415 /* avoid interference with interrupt */
416 spin_lock_irqsave(&timer_lock, flags);
417 if (last_value) {
418 /* clear unread bits in UART and restart */
419 outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
420 /* determine 'virtual' pulse end: */
421 pulse_end = min_t(unsigned long,
422 ktime_us_delta(last, last_intr_time),
423 PULSE_MASK);
424 dev_dbg(driver.dev, "timeout add %d for %lu usec\n",
425 last_value, pulse_end);
426 add_read_queue(last_value, pulse_end);
427 last_value = 0;
428 last = last_intr_time;
429 }
430 spin_unlock_irqrestore(&timer_lock, flags);
431 }
432
433 static irqreturn_t sir_interrupt(int irq, void *dev_id)
434 {
435 unsigned char data;
436 ktime_t curr_time;
437 static unsigned long delt;
438 unsigned long deltintr;
439 unsigned long flags;
440 int iir, lsr;
441
442 while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
443 switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
444 case UART_IIR_MSI:
445 (void) inb(io + UART_MSR);
446 break;
447 case UART_IIR_RLSI:
448 (void) inb(io + UART_LSR);
449 break;
450 case UART_IIR_THRI:
451 #if 0
452 if (lsr & UART_LSR_THRE) /* FIFO is empty */
453 outb(data, io + UART_TX)
454 #endif
455 break;
456 case UART_IIR_RDI:
457 /* avoid interference with timer */
458 spin_lock_irqsave(&timer_lock, flags);
459 do {
460 del_timer(&timerlist);
461 data = inb(io + UART_RX);
462 curr_time = ktime_get();
463 delt = min_t(unsigned long,
464 ktime_us_delta(last, curr_time),
465 PULSE_MASK);
466 deltintr = min_t(unsigned long,
467 ktime_us_delta(last_intr_time,
468 curr_time),
469 PULSE_MASK);
470 dev_dbg(driver.dev, "t %lu, d %d\n",
471 deltintr, (int)data);
472 /*
473 * if nothing came in last X cycles,
474 * it was gap
475 */
476 if (deltintr > TIME_CONST * threshold) {
477 if (last_value) {
478 dev_dbg(driver.dev, "GAP\n");
479 /* simulate signal change */
480 add_read_queue(last_value,
481 delt -
482 deltintr);
483 last_value = 0;
484 last = last_intr_time;
485 delt = deltintr;
486 }
487 }
488 data = 1;
489 if (data ^ last_value) {
490 /*
491 * deltintr > 2*TIME_CONST, remember?
492 * the other case is timeout
493 */
494 add_read_queue(last_value,
495 delt-TIME_CONST);
496 last_value = data;
497 last = curr_time;
498 last = ktime_sub_us(last,
499 TIME_CONST);
500 }
501 last_intr_time = curr_time;
502 if (data) {
503 /*
504 * start timer for end of
505 * sequence detection
506 */
507 timerlist.expires = jiffies +
508 SIR_TIMEOUT;
509 add_timer(&timerlist);
510 }
511
512 lsr = inb(io + UART_LSR);
513 } while (lsr & UART_LSR_DR); /* data ready */
514 spin_unlock_irqrestore(&timer_lock, flags);
515 break;
516 default:
517 break;
518 }
519 }
520 return IRQ_RETVAL(IRQ_HANDLED);
521 }
522
523 static void send_space(unsigned long len)
524 {
525 safe_udelay(len);
526 }
527
528 static void send_pulse(unsigned long len)
529 {
530 long bytes_out = len / TIME_CONST;
531
532 if (bytes_out == 0)
533 bytes_out++;
534
535 while (bytes_out--) {
536 outb(PULSE, io + UART_TX);
537 /* FIXME treba seriozne cakanie z char/serial.c */
538 while (!(inb(io + UART_LSR) & UART_LSR_THRE))
539 ;
540 }
541 }
542
543 static int init_hardware(void)
544 {
545 unsigned long flags;
546
547 spin_lock_irqsave(&hardware_lock, flags);
548 /* reset UART */
549 #if defined(LIRC_SIR_TEKRAM)
550 /* disable FIFO */
551 soutp(UART_FCR,
552 UART_FCR_CLEAR_RCVR|
553 UART_FCR_CLEAR_XMIT|
554 UART_FCR_TRIGGER_1);
555
556 /* Set DLAB 0. */
557 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
558
559 /* First of all, disable all interrupts */
560 soutp(UART_IER, sinp(UART_IER) &
561 (~(UART_IER_MSI|UART_IER_RLSI|UART_IER_THRI|UART_IER_RDI)));
562
563 /* Set DLAB 1. */
564 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
565
566 /* Set divisor to 12 => 9600 Baud */
567 soutp(UART_DLM, 0);
568 soutp(UART_DLL, 12);
569
570 /* Set DLAB 0. */
571 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
572
573 /* power supply */
574 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
575 safe_udelay(50*1000);
576
577 /* -DTR low -> reset PIC */
578 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
579 udelay(1*1000);
580
581 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
582 udelay(100);
583
584
585 /* -RTS low -> send control byte */
586 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
587 udelay(7);
588 soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
589
590 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
591 udelay(1500);
592
593 /* back to normal operation */
594 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
595 udelay(50);
596
597 udelay(1500);
598
599 /* read previous control byte */
600 pr_info("0x%02x\n", sinp(UART_RX));
601
602 /* Set DLAB 1. */
603 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
604
605 /* Set divisor to 1 => 115200 Baud */
606 soutp(UART_DLM, 0);
607 soutp(UART_DLL, 1);
608
609 /* Set DLAB 0, 8 Bit */
610 soutp(UART_LCR, UART_LCR_WLEN8);
611 /* enable interrupts */
612 soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
613 #else
614 outb(0, io + UART_MCR);
615 outb(0, io + UART_IER);
616 /* init UART */
617 /* set DLAB, speed = 115200 */
618 outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
619 outb(1, io + UART_DLL); outb(0, io + UART_DLM);
620 /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
621 outb(UART_LCR_WLEN7, io + UART_LCR);
622 /* FIFO operation */
623 outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
624 /* interrupts */
625 /* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
626 outb(UART_IER_RDI, io + UART_IER);
627 /* turn on UART */
628 outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
629 #ifdef LIRC_SIR_ACTISYS_ACT200L
630 init_act200();
631 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
632 init_act220();
633 #endif
634 #endif
635 spin_unlock_irqrestore(&hardware_lock, flags);
636 return 0;
637 }
638
639 static void drop_hardware(void)
640 {
641 unsigned long flags;
642
643 spin_lock_irqsave(&hardware_lock, flags);
644
645 /* turn off interrupts */
646 outb(0, io + UART_IER);
647
648 spin_unlock_irqrestore(&hardware_lock, flags);
649 }
650
651 /* SECTION: Initialisation */
652
653 static int init_port(void)
654 {
655 int retval;
656
657 /* get I/O port access and IRQ line */
658 if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
659 pr_err("i/o port 0x%.4x already in use.\n", io);
660 return -EBUSY;
661 }
662 retval = request_irq(irq, sir_interrupt, 0,
663 LIRC_DRIVER_NAME, NULL);
664 if (retval < 0) {
665 release_region(io, 8);
666 pr_err("IRQ %d already in use.\n", irq);
667 return retval;
668 }
669 pr_info("I/O port 0x%.4x, IRQ %d.\n", io, irq);
670
671 setup_timer(&timerlist, sir_timeout, 0);
672
673 return 0;
674 }
675
676 static void drop_port(void)
677 {
678 free_irq(irq, NULL);
679 del_timer_sync(&timerlist);
680 release_region(io, 8);
681 }
682
683 #ifdef LIRC_SIR_ACTISYS_ACT200L
684 /* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
685 /* some code borrowed from Linux IRDA driver */
686
687 /* Register 0: Control register #1 */
688 #define ACT200L_REG0 0x00
689 #define ACT200L_TXEN 0x01 /* Enable transmitter */
690 #define ACT200L_RXEN 0x02 /* Enable receiver */
691 #define ACT200L_ECHO 0x08 /* Echo control chars */
692
693 /* Register 1: Control register #2 */
694 #define ACT200L_REG1 0x10
695 #define ACT200L_LODB 0x01 /* Load new baud rate count value */
696 #define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
697
698 /* Register 3: Transmit mode register #2 */
699 #define ACT200L_REG3 0x30
700 #define ACT200L_B0 0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
701 #define ACT200L_B1 0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
702 #define ACT200L_CHSY 0x04 /* StartBit Synced 0=bittime, 1=startbit */
703
704 /* Register 4: Output Power register */
705 #define ACT200L_REG4 0x40
706 #define ACT200L_OP0 0x01 /* Enable LED1C output */
707 #define ACT200L_OP1 0x02 /* Enable LED2C output */
708 #define ACT200L_BLKR 0x04
709
710 /* Register 5: Receive Mode register */
711 #define ACT200L_REG5 0x50
712 #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
713 /*.. other various IRDA bit modes, and TV remote modes..*/
714
715 /* Register 6: Receive Sensitivity register #1 */
716 #define ACT200L_REG6 0x60
717 #define ACT200L_RS0 0x01 /* receive threshold bit 0 */
718 #define ACT200L_RS1 0x02 /* receive threshold bit 1 */
719
720 /* Register 7: Receive Sensitivity register #2 */
721 #define ACT200L_REG7 0x70
722 #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
723
724 /* Register 8,9: Baud Rate Divider register #1,#2 */
725 #define ACT200L_REG8 0x80
726 #define ACT200L_REG9 0x90
727
728 #define ACT200L_2400 0x5f
729 #define ACT200L_9600 0x17
730 #define ACT200L_19200 0x0b
731 #define ACT200L_38400 0x05
732 #define ACT200L_57600 0x03
733 #define ACT200L_115200 0x01
734
735 /* Register 13: Control register #3 */
736 #define ACT200L_REG13 0xd0
737 #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
738
739 /* Register 15: Status register */
740 #define ACT200L_REG15 0xf0
741
742 /* Register 21: Control register #4 */
743 #define ACT200L_REG21 0x50
744 #define ACT200L_EXCK 0x02 /* Disable clock output driver */
745 #define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
746
747 static void init_act200(void)
748 {
749 int i;
750 __u8 control[] = {
751 ACT200L_REG15,
752 ACT200L_REG13 | ACT200L_SHDW,
753 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
754 ACT200L_REG13,
755 ACT200L_REG7 | ACT200L_ENPOS,
756 ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
757 ACT200L_REG5 | ACT200L_RWIDL,
758 ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
759 ACT200L_REG3 | ACT200L_B0,
760 ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN,
761 ACT200L_REG8 | (ACT200L_115200 & 0x0f),
762 ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
763 ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
764 };
765
766 /* Set DLAB 1. */
767 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
768
769 /* Set divisor to 12 => 9600 Baud */
770 soutp(UART_DLM, 0);
771 soutp(UART_DLL, 12);
772
773 /* Set DLAB 0. */
774 soutp(UART_LCR, UART_LCR_WLEN8);
775 /* Set divisor to 12 => 9600 Baud */
776
777 /* power supply */
778 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
779 for (i = 0; i < 50; i++)
780 safe_udelay(1000);
781
782 /* Reset the dongle : set RTS low for 25 ms */
783 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
784 for (i = 0; i < 25; i++)
785 udelay(1000);
786
787 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
788 udelay(100);
789
790 /* Clear DTR and set RTS to enter command mode */
791 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
792 udelay(7);
793
794 /* send out the control register settings for 115K 7N1 SIR operation */
795 for (i = 0; i < sizeof(control); i++) {
796 soutp(UART_TX, control[i]);
797 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
798 udelay(1500);
799 }
800
801 /* back to normal operation */
802 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
803 udelay(50);
804
805 udelay(1500);
806 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
807
808 /* Set DLAB 1. */
809 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
810
811 /* Set divisor to 1 => 115200 Baud */
812 soutp(UART_DLM, 0);
813 soutp(UART_DLL, 1);
814
815 /* Set DLAB 0. */
816 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
817
818 /* Set DLAB 0, 7 Bit */
819 soutp(UART_LCR, UART_LCR_WLEN7);
820
821 /* enable interrupts */
822 soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
823 }
824 #endif
825
826 #ifdef LIRC_SIR_ACTISYS_ACT220L
827 /*
828 * Derived from linux IrDA driver (net/irda/actisys.c)
829 * Drop me a mail for any kind of comment: maxx@spaceboyz.net
830 */
831
832 void init_act220(void)
833 {
834 int i;
835
836 /* DLAB 1 */
837 soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
838
839 /* 9600 baud */
840 soutp(UART_DLM, 0);
841 soutp(UART_DLL, 12);
842
843 /* DLAB 0 */
844 soutp(UART_LCR, UART_LCR_WLEN7);
845
846 /* reset the dongle, set DTR low for 10us */
847 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
848 udelay(10);
849
850 /* back to normal (still 9600) */
851 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
852
853 /*
854 * send RTS pulses until we reach 115200
855 * i hope this is really the same for act220l/act220l+
856 */
857 for (i = 0; i < 3; i++) {
858 udelay(10);
859 /* set RTS low for 10 us */
860 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
861 udelay(10);
862 /* set RTS high for 10 us */
863 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
864 }
865
866 /* back to normal operation */
867 udelay(1500); /* better safe than sorry ;) */
868
869 /* Set DLAB 1. */
870 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
871
872 /* Set divisor to 1 => 115200 Baud */
873 soutp(UART_DLM, 0);
874 soutp(UART_DLL, 1);
875
876 /* Set DLAB 0, 7 Bit */
877 /* The dongle doesn't seem to have any problems with operation at 7N1 */
878 soutp(UART_LCR, UART_LCR_WLEN7);
879
880 /* enable interrupts */
881 soutp(UART_IER, UART_IER_RDI);
882 }
883 #endif
884
885 static int init_lirc_sir(void)
886 {
887 int retval;
888
889 init_waitqueue_head(&lirc_read_queue);
890 retval = init_port();
891 if (retval < 0)
892 return retval;
893 init_hardware();
894 pr_info("Installed.\n");
895 return 0;
896 }
897
898 static int lirc_sir_probe(struct platform_device *dev)
899 {
900 return 0;
901 }
902
903 static int lirc_sir_remove(struct platform_device *dev)
904 {
905 return 0;
906 }
907
908 static struct platform_driver lirc_sir_driver = {
909 .probe = lirc_sir_probe,
910 .remove = lirc_sir_remove,
911 .driver = {
912 .name = "lirc_sir",
913 },
914 };
915
916 static int __init lirc_sir_init(void)
917 {
918 int retval;
919
920 retval = platform_driver_register(&lirc_sir_driver);
921 if (retval) {
922 pr_err("Platform driver register failed!\n");
923 return -ENODEV;
924 }
925
926 lirc_sir_dev = platform_device_alloc("lirc_dev", 0);
927 if (!lirc_sir_dev) {
928 pr_err("Platform device alloc failed!\n");
929 retval = -ENOMEM;
930 goto pdev_alloc_fail;
931 }
932
933 retval = platform_device_add(lirc_sir_dev);
934 if (retval) {
935 pr_err("Platform device add failed!\n");
936 retval = -ENODEV;
937 goto pdev_add_fail;
938 }
939
940 retval = init_chrdev();
941 if (retval < 0)
942 goto fail;
943
944 retval = init_lirc_sir();
945 if (retval) {
946 drop_chrdev();
947 goto fail;
948 }
949
950 return 0;
951
952 fail:
953 platform_device_del(lirc_sir_dev);
954 pdev_add_fail:
955 platform_device_put(lirc_sir_dev);
956 pdev_alloc_fail:
957 platform_driver_unregister(&lirc_sir_driver);
958 return retval;
959 }
960
961 static void __exit lirc_sir_exit(void)
962 {
963 drop_hardware();
964 drop_chrdev();
965 drop_port();
966 platform_device_unregister(lirc_sir_dev);
967 platform_driver_unregister(&lirc_sir_driver);
968 pr_info("Uninstalled.\n");
969 }
970
971 module_init(lirc_sir_init);
972 module_exit(lirc_sir_exit);
973
974 #ifdef LIRC_SIR_TEKRAM
975 MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
976 MODULE_AUTHOR("Christoph Bartelmus");
977 #elif defined(LIRC_SIR_ACTISYS_ACT200L)
978 MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
979 MODULE_AUTHOR("Karl Bongers");
980 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
981 MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
982 MODULE_AUTHOR("Jan Roemisch");
983 #else
984 MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
985 MODULE_AUTHOR("Milan Pikula");
986 #endif
987 MODULE_LICENSE("GPL");
988
989 module_param(io, int, S_IRUGO);
990 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
991
992 module_param(irq, int, S_IRUGO);
993 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
994
995 module_param(threshold, int, S_IRUGO);
996 MODULE_PARM_DESC(threshold, "space detection threshold (3)");
997
998 module_param(debug, bool, S_IRUGO | S_IWUSR);
999 MODULE_PARM_DESC(debug, "Enable debugging messages");
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