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drivers/staging/usbip/userspace/libsrc/vhci_driver.c: test the just-initialized value
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / lirc / lirc_sir.c
blob0d3864594b12abf28545f4b52cc511ae5ce17378
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 #include <linux/module.h>
37 #include <linux/sched.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
40 #include <linux/fs.h>
41 #include <linux/interrupt.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/serial_reg.h>
45 #include <linux/time.h>
46 #include <linux/string.h>
47 #include <linux/types.h>
48 #include <linux/wait.h>
49 #include <linux/mm.h>
50 #include <linux/delay.h>
51 #include <linux/poll.h>
52 #include <asm/system.h>
53 #include <linux/io.h>
54 #include <asm/irq.h>
55 #include <linux/fcntl.h>
56 #ifdef LIRC_ON_SA1100
57 #include <asm/hardware.h>
58 #ifdef CONFIG_SA1100_COLLIE
59 #include <asm/arch/tc35143.h>
60 #include <asm/ucb1200.h>
61 #endif
62 #endif
63
64 #include <linux/timer.h>
65
66 #include <media/lirc.h>
67 #include <media/lirc_dev.h>
68
69 /* SECTION: Definitions */
70
71 /*** Tekram dongle ***/
72 #ifdef LIRC_SIR_TEKRAM
73 /* stolen from kernel source */
74 /* definitions for Tekram dongle */
75 #define TEKRAM_115200 0x00
76 #define TEKRAM_57600 0x01
77 #define TEKRAM_38400 0x02
78 #define TEKRAM_19200 0x03
79 #define TEKRAM_9600 0x04
80 #define TEKRAM_2400 0x08
81
82 #define TEKRAM_PW 0x10 /* Pulse select bit */
83
84 /* 10bit * 1s/115200bit in milliseconds = 87ms*/
85 #define TIME_CONST (10000000ul/115200ul)
86
87 #endif
88
89 #ifdef LIRC_SIR_ACTISYS_ACT200L
90 static void init_act200(void);
91 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
92 static void init_act220(void);
93 #endif
94
95 /*** SA1100 ***/
96 #ifdef LIRC_ON_SA1100
97 struct sa1100_ser2_registers {
98 /* HSSP control register */
99 unsigned char hscr0;
100 /* UART registers */
101 unsigned char utcr0;
102 unsigned char utcr1;
103 unsigned char utcr2;
104 unsigned char utcr3;
105 unsigned char utcr4;
106 unsigned char utdr;
107 unsigned char utsr0;
108 unsigned char utsr1;
109 } sr;
110
111 static int irq = IRQ_Ser2ICP;
112
113 #define LIRC_ON_SA1100_TRANSMITTER_LATENCY 0
114
115 /* pulse/space ratio of 50/50 */
116 static unsigned long pulse_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
117 /* 1000000/freq-pulse_width */
118 static unsigned long space_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
119 static unsigned int freq = 38000; /* modulation frequency */
120 static unsigned int duty_cycle = 50; /* duty cycle of 50% */
121
122 #endif
123
124 #define RBUF_LEN 1024
125 #define WBUF_LEN 1024
126
127 #define LIRC_DRIVER_NAME "lirc_sir"
128
129 #define PULSE '['
130
131 #ifndef LIRC_SIR_TEKRAM
132 /* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
133 #define TIME_CONST (9000000ul/115200ul)
134 #endif
135
136
137 /* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
138 #define SIR_TIMEOUT (HZ*5/100)
139
140 #ifndef LIRC_ON_SA1100
141 #ifndef LIRC_IRQ
142 #define LIRC_IRQ 4
143 #endif
144 #ifndef LIRC_PORT
145 /* for external dongles, default to com1 */
146 #if defined(LIRC_SIR_ACTISYS_ACT200L) || \
147 defined(LIRC_SIR_ACTISYS_ACT220L) || \
148 defined(LIRC_SIR_TEKRAM)
149 #define LIRC_PORT 0x3f8
150 #else
151 /* onboard sir ports are typically com3 */
152 #define LIRC_PORT 0x3e8
153 #endif
154 #endif
155
156 static int io = LIRC_PORT;
157 static int irq = LIRC_IRQ;
158 static int threshold = 3;
159 #endif
160
161 static DEFINE_SPINLOCK(timer_lock);
162 static struct timer_list timerlist;
163 /* time of last signal change detected */
164 static struct timeval last_tv = {0, 0};
165 /* time of last UART data ready interrupt */
166 static struct timeval last_intr_tv = {0, 0};
167 static int last_value;
168
169 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
170
171 static DEFINE_SPINLOCK(hardware_lock);
172
173 static int rx_buf[RBUF_LEN];
174 static unsigned int rx_tail, rx_head;
175
176 static int debug;
177 #define dprintk(fmt, args...) \
178 do { \
179 if (debug) \
180 printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
181 fmt, ## args); \
182 } while (0)
183
184 /* SECTION: Prototypes */
185
186 /* Communication with user-space */
187 static unsigned int lirc_poll(struct file *file, poll_table *wait);
188 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
189 loff_t *ppos);
190 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
191 loff_t *pos);
192 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
193 static void add_read_queue(int flag, unsigned long val);
194 static int init_chrdev(void);
195 static void drop_chrdev(void);
196 /* Hardware */
197 static irqreturn_t sir_interrupt(int irq, void *dev_id);
198 static void send_space(unsigned long len);
199 static void send_pulse(unsigned long len);
200 static int init_hardware(void);
201 static void drop_hardware(void);
202 /* Initialisation */
203 static int init_port(void);
204 static void drop_port(void);
205
206 #ifdef LIRC_ON_SA1100
207 static void on(void)
208 {
209 PPSR |= PPC_TXD2;
210 }
211
212 static void off(void)
213 {
214 PPSR &= ~PPC_TXD2;
215 }
216 #else
217 static inline unsigned int sinp(int offset)
218 {
219 return inb(io + offset);
220 }
221
222 static inline void soutp(int offset, int value)
223 {
224 outb(value, io + offset);
225 }
226 #endif
227
228 #ifndef MAX_UDELAY_MS
229 #define MAX_UDELAY_US 5000
230 #else
231 #define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
232 #endif
233
234 static void safe_udelay(unsigned long usecs)
235 {
236 while (usecs > MAX_UDELAY_US) {
237 udelay(MAX_UDELAY_US);
238 usecs -= MAX_UDELAY_US;
239 }
240 udelay(usecs);
241 }
242
243 /* SECTION: Communication with user-space */
244
245 static unsigned int lirc_poll(struct file *file, poll_table *wait)
246 {
247 poll_wait(file, &lirc_read_queue, wait);
248 if (rx_head != rx_tail)
249 return POLLIN | POLLRDNORM;
250 return 0;
251 }
252
253 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
254 loff_t *ppos)
255 {
256 int n = 0;
257 int retval = 0;
258 DECLARE_WAITQUEUE(wait, current);
259
260 if (count % sizeof(int))
261 return -EINVAL;
262
263 add_wait_queue(&lirc_read_queue, &wait);
264 set_current_state(TASK_INTERRUPTIBLE);
265 while (n < count) {
266 if (rx_head != rx_tail) {
267 if (copy_to_user((void *) buf + n,
268 (void *) (rx_buf + rx_head),
269 sizeof(int))) {
270 retval = -EFAULT;
271 break;
272 }
273 rx_head = (rx_head + 1) & (RBUF_LEN - 1);
274 n += sizeof(int);
275 } else {
276 if (file->f_flags & O_NONBLOCK) {
277 retval = -EAGAIN;
278 break;
279 }
280 if (signal_pending(current)) {
281 retval = -ERESTARTSYS;
282 break;
283 }
284 schedule();
285 set_current_state(TASK_INTERRUPTIBLE);
286 }
287 }
288 remove_wait_queue(&lirc_read_queue, &wait);
289 set_current_state(TASK_RUNNING);
290 return n ? n : retval;
291 }
292 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
293 loff_t *pos)
294 {
295 unsigned long flags;
296 int i, count;
297 int *tx_buf;
298
299 count = n / sizeof(int);
300 if (n % sizeof(int) || count % 2 == 0)
301 return -EINVAL;
302 tx_buf = memdup_user(buf, n);
303 if (IS_ERR(tx_buf))
304 return PTR_ERR(tx_buf);
305 i = 0;
306 #ifdef LIRC_ON_SA1100
307 /* disable receiver */
308 Ser2UTCR3 = 0;
309 #endif
310 local_irq_save(flags);
311 while (1) {
312 if (i >= count)
313 break;
314 if (tx_buf[i])
315 send_pulse(tx_buf[i]);
316 i++;
317 if (i >= count)
318 break;
319 if (tx_buf[i])
320 send_space(tx_buf[i]);
321 i++;
322 }
323 local_irq_restore(flags);
324 #ifdef LIRC_ON_SA1100
325 off();
326 udelay(1000); /* wait 1ms for IR diode to recover */
327 Ser2UTCR3 = 0;
328 /* clear status register to prevent unwanted interrupts */
329 Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
330 /* enable receiver */
331 Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
332 #endif
333 kfree(tx_buf);
334 return count;
335 }
336
337 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
338 {
339 int retval = 0;
340 __u32 value = 0;
341 #ifdef LIRC_ON_SA1100
342
343 if (cmd == LIRC_GET_FEATURES)
344 value = LIRC_CAN_SEND_PULSE |
345 LIRC_CAN_SET_SEND_DUTY_CYCLE |
346 LIRC_CAN_SET_SEND_CARRIER |
347 LIRC_CAN_REC_MODE2;
348 else if (cmd == LIRC_GET_SEND_MODE)
349 value = LIRC_MODE_PULSE;
350 else if (cmd == LIRC_GET_REC_MODE)
351 value = LIRC_MODE_MODE2;
352 #else
353 if (cmd == LIRC_GET_FEATURES)
354 value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
355 else if (cmd == LIRC_GET_SEND_MODE)
356 value = LIRC_MODE_PULSE;
357 else if (cmd == LIRC_GET_REC_MODE)
358 value = LIRC_MODE_MODE2;
359 #endif
360
361 switch (cmd) {
362 case LIRC_GET_FEATURES:
363 case LIRC_GET_SEND_MODE:
364 case LIRC_GET_REC_MODE:
365 retval = put_user(value, (__u32 *) arg);
366 break;
367
368 case LIRC_SET_SEND_MODE:
369 case LIRC_SET_REC_MODE:
370 retval = get_user(value, (__u32 *) arg);
371 break;
372 #ifdef LIRC_ON_SA1100
373 case LIRC_SET_SEND_DUTY_CYCLE:
374 retval = get_user(value, (__u32 *) arg);
375 if (retval)
376 return retval;
377 if (value <= 0 || value > 100)
378 return -EINVAL;
379 /* (value/100)*(1000000/freq) */
380 duty_cycle = value;
381 pulse_width = (unsigned long) duty_cycle*10000/freq;
382 space_width = (unsigned long) 1000000L/freq-pulse_width;
383 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
384 pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
385 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
386 space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
387 break;
388 case LIRC_SET_SEND_CARRIER:
389 retval = get_user(value, (__u32 *) arg);
390 if (retval)
391 return retval;
392 if (value > 500000 || value < 20000)
393 return -EINVAL;
394 freq = value;
395 pulse_width = (unsigned long) duty_cycle*10000/freq;
396 space_width = (unsigned long) 1000000L/freq-pulse_width;
397 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
398 pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
399 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
400 space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
401 break;
402 #endif
403 default:
404 retval = -ENOIOCTLCMD;
405
406 }
407
408 if (retval)
409 return retval;
410 if (cmd == LIRC_SET_REC_MODE) {
411 if (value != LIRC_MODE_MODE2)
412 retval = -ENOSYS;
413 } else if (cmd == LIRC_SET_SEND_MODE) {
414 if (value != LIRC_MODE_PULSE)
415 retval = -ENOSYS;
416 }
417
418 return retval;
419 }
420
421 static void add_read_queue(int flag, unsigned long val)
422 {
423 unsigned int new_rx_tail;
424 int newval;
425
426 dprintk("add flag %d with val %lu\n", flag, val);
427
428 newval = val & PULSE_MASK;
429
430 /*
431 * statistically, pulses are ~TIME_CONST/2 too long. we could
432 * maybe make this more exact, but this is good enough
433 */
434 if (flag) {
435 /* pulse */
436 if (newval > TIME_CONST/2)
437 newval -= TIME_CONST/2;
438 else /* should not ever happen */
439 newval = 1;
440 newval |= PULSE_BIT;
441 } else {
442 newval += TIME_CONST/2;
443 }
444 new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
445 if (new_rx_tail == rx_head) {
446 dprintk("Buffer overrun.\n");
447 return;
448 }
449 rx_buf[rx_tail] = newval;
450 rx_tail = new_rx_tail;
451 wake_up_interruptible(&lirc_read_queue);
452 }
453
454 static const struct file_operations lirc_fops = {
455 .owner = THIS_MODULE,
456 .read = lirc_read,
457 .write = lirc_write,
458 .poll = lirc_poll,
459 .unlocked_ioctl = lirc_ioctl,
460 #ifdef CONFIG_COMPAT
461 .compat_ioctl = lirc_ioctl,
462 #endif
463 .open = lirc_dev_fop_open,
464 .release = lirc_dev_fop_close,
465 .llseek = no_llseek,
466 };
467
468 static int set_use_inc(void *data)
469 {
470 return 0;
471 }
472
473 static void set_use_dec(void *data)
474 {
475 }
476
477 static struct lirc_driver driver = {
478 .name = LIRC_DRIVER_NAME,
479 .minor = -1,
480 .code_length = 1,
481 .sample_rate = 0,
482 .data = NULL,
483 .add_to_buf = NULL,
484 .set_use_inc = set_use_inc,
485 .set_use_dec = set_use_dec,
486 .fops = &lirc_fops,
487 .dev = NULL,
488 .owner = THIS_MODULE,
489 };
490
491
492 static int init_chrdev(void)
493 {
494 driver.minor = lirc_register_driver(&driver);
495 if (driver.minor < 0) {
496 printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n");
497 return -EIO;
498 }
499 return 0;
500 }
501
502 static void drop_chrdev(void)
503 {
504 lirc_unregister_driver(driver.minor);
505 }
506
507 /* SECTION: Hardware */
508 static long delta(struct timeval *tv1, struct timeval *tv2)
509 {
510 unsigned long deltv;
511
512 deltv = tv2->tv_sec - tv1->tv_sec;
513 if (deltv > 15)
514 deltv = 0xFFFFFF;
515 else
516 deltv = deltv*1000000 +
517 tv2->tv_usec -
518 tv1->tv_usec;
519 return deltv;
520 }
521
522 static void sir_timeout(unsigned long data)
523 {
524 /*
525 * if last received signal was a pulse, but receiving stopped
526 * within the 9 bit frame, we need to finish this pulse and
527 * simulate a signal change to from pulse to space. Otherwise
528 * upper layers will receive two sequences next time.
529 */
530
531 unsigned long flags;
532 unsigned long pulse_end;
533
534 /* avoid interference with interrupt */
535 spin_lock_irqsave(&timer_lock, flags);
536 if (last_value) {
537 #ifndef LIRC_ON_SA1100
538 /* clear unread bits in UART and restart */
539 outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
540 #endif
541 /* determine 'virtual' pulse end: */
542 pulse_end = delta(&last_tv, &last_intr_tv);
543 dprintk("timeout add %d for %lu usec\n", last_value, pulse_end);
544 add_read_queue(last_value, pulse_end);
545 last_value = 0;
546 last_tv = last_intr_tv;
547 }
548 spin_unlock_irqrestore(&timer_lock, flags);
549 }
550
551 static irqreturn_t sir_interrupt(int irq, void *dev_id)
552 {
553 unsigned char data;
554 struct timeval curr_tv;
555 static unsigned long deltv;
556 #ifdef LIRC_ON_SA1100
557 int status;
558 static int n;
559
560 status = Ser2UTSR0;
561 /*
562 * Deal with any receive errors first. The bytes in error may be
563 * the only bytes in the receive FIFO, so we do this first.
564 */
565 while (status & UTSR0_EIF) {
566 int bstat;
567
568 if (debug) {
569 dprintk("EIF\n");
570 bstat = Ser2UTSR1;
571
572 if (bstat & UTSR1_FRE)
573 dprintk("frame error\n");
574 if (bstat & UTSR1_ROR)
575 dprintk("receive fifo overrun\n");
576 if (bstat & UTSR1_PRE)
577 dprintk("parity error\n");
578 }
579
580 bstat = Ser2UTDR;
581 n++;
582 status = Ser2UTSR0;
583 }
584
585 if (status & (UTSR0_RFS | UTSR0_RID)) {
586 do_gettimeofday(&curr_tv);
587 deltv = delta(&last_tv, &curr_tv);
588 do {
589 data = Ser2UTDR;
590 dprintk("%d data: %u\n", n, (unsigned int) data);
591 n++;
592 } while (status & UTSR0_RID && /* do not empty fifo in order to
593 * get UTSR0_RID in any case */
594 Ser2UTSR1 & UTSR1_RNE); /* data ready */
595
596 if (status&UTSR0_RID) {
597 add_read_queue(0 , deltv - n * TIME_CONST); /*space*/
598 add_read_queue(1, n * TIME_CONST); /*pulse*/
599 n = 0;
600 last_tv = curr_tv;
601 }
602 }
603
604 if (status & UTSR0_TFS)
605 printk(KERN_ERR "transmit fifo not full, shouldn't happen\n");
606
607 /* We must clear certain bits. */
608 status &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
609 if (status)
610 Ser2UTSR0 = status;
611 #else
612 unsigned long deltintrtv;
613 unsigned long flags;
614 int iir, lsr;
615
616 while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
617 switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
618 case UART_IIR_MSI:
619 (void) inb(io + UART_MSR);
620 break;
621 case UART_IIR_RLSI:
622 (void) inb(io + UART_LSR);
623 break;
624 case UART_IIR_THRI:
625 #if 0
626 if (lsr & UART_LSR_THRE) /* FIFO is empty */
627 outb(data, io + UART_TX)
628 #endif
629 break;
630 case UART_IIR_RDI:
631 /* avoid interference with timer */
632 spin_lock_irqsave(&timer_lock, flags);
633 do {
634 del_timer(&timerlist);
635 data = inb(io + UART_RX);
636 do_gettimeofday(&curr_tv);
637 deltv = delta(&last_tv, &curr_tv);
638 deltintrtv = delta(&last_intr_tv, &curr_tv);
639 dprintk("t %lu, d %d\n", deltintrtv, (int)data);
640 /*
641 * if nothing came in last X cycles,
642 * it was gap
643 */
644 if (deltintrtv > TIME_CONST * threshold) {
645 if (last_value) {
646 dprintk("GAP\n");
647 /* simulate signal change */
648 add_read_queue(last_value,
649 deltv -
650 deltintrtv);
651 last_value = 0;
652 last_tv.tv_sec =
653 last_intr_tv.tv_sec;
654 last_tv.tv_usec =
655 last_intr_tv.tv_usec;
656 deltv = deltintrtv;
657 }
658 }
659 data = 1;
660 if (data ^ last_value) {
661 /*
662 * deltintrtv > 2*TIME_CONST, remember?
663 * the other case is timeout
664 */
665 add_read_queue(last_value,
666 deltv-TIME_CONST);
667 last_value = data;
668 last_tv = curr_tv;
669 if (last_tv.tv_usec >= TIME_CONST) {
670 last_tv.tv_usec -= TIME_CONST;
671 } else {
672 last_tv.tv_sec--;
673 last_tv.tv_usec += 1000000 -
674 TIME_CONST;
675 }
676 }
677 last_intr_tv = curr_tv;
678 if (data) {
679 /*
680 * start timer for end of
681 * sequence detection
682 */
683 timerlist.expires = jiffies +
684 SIR_TIMEOUT;
685 add_timer(&timerlist);
686 }
687
688 lsr = inb(io + UART_LSR);
689 } while (lsr & UART_LSR_DR); /* data ready */
690 spin_unlock_irqrestore(&timer_lock, flags);
691 break;
692 default:
693 break;
694 }
695 }
696 #endif
697 return IRQ_RETVAL(IRQ_HANDLED);
698 }
699
700 #ifdef LIRC_ON_SA1100
701 static void send_pulse(unsigned long length)
702 {
703 unsigned long k, delay;
704 int flag;
705
706 if (length == 0)
707 return;
708 /*
709 * this won't give us the carrier frequency we really want
710 * due to integer arithmetic, but we can accept this inaccuracy
711 */
712
713 for (k = flag = 0; k < length; k += delay, flag = !flag) {
714 if (flag) {
715 off();
716 delay = space_width;
717 } else {
718 on();
719 delay = pulse_width;
720 }
721 safe_udelay(delay);
722 }
723 off();
724 }
725
726 static void send_space(unsigned long length)
727 {
728 if (length == 0)
729 return;
730 off();
731 safe_udelay(length);
732 }
733 #else
734 static void send_space(unsigned long len)
735 {
736 safe_udelay(len);
737 }
738
739 static void send_pulse(unsigned long len)
740 {
741 long bytes_out = len / TIME_CONST;
742
743 if (bytes_out == 0)
744 bytes_out++;
745
746 while (bytes_out--) {
747 outb(PULSE, io + UART_TX);
748 /* FIXME treba seriozne cakanie z char/serial.c */
749 while (!(inb(io + UART_LSR) & UART_LSR_THRE))
750 ;
751 }
752 }
753 #endif
754
755 #ifdef CONFIG_SA1100_COLLIE
756 static int sa1100_irda_set_power_collie(int state)
757 {
758 if (state) {
759 /*
760 * 0 - off
761 * 1 - short range, lowest power
762 * 2 - medium range, medium power
763 * 3 - maximum range, high power
764 */
765 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
766 TC35143_IODIR_OUTPUT);
767 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_LOW);
768 udelay(100);
769 } else {
770 /* OFF */
771 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
772 TC35143_IODIR_OUTPUT);
773 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_HIGH);
774 }
775 return 0;
776 }
777 #endif
778
779 static int init_hardware(void)
780 {
781 unsigned long flags;
782
783 spin_lock_irqsave(&hardware_lock, flags);
784 /* reset UART */
785 #ifdef LIRC_ON_SA1100
786 #ifdef CONFIG_SA1100_BITSY
787 if (machine_is_bitsy()) {
788 printk(KERN_INFO "Power on IR module\n");
789 set_bitsy_egpio(EGPIO_BITSY_IR_ON);
790 }
791 #endif
792 #ifdef CONFIG_SA1100_COLLIE
793 sa1100_irda_set_power_collie(3); /* power on */
794 #endif
795 sr.hscr0 = Ser2HSCR0;
796
797 sr.utcr0 = Ser2UTCR0;
798 sr.utcr1 = Ser2UTCR1;
799 sr.utcr2 = Ser2UTCR2;
800 sr.utcr3 = Ser2UTCR3;
801 sr.utcr4 = Ser2UTCR4;
802
803 sr.utdr = Ser2UTDR;
804 sr.utsr0 = Ser2UTSR0;
805 sr.utsr1 = Ser2UTSR1;
806
807 /* configure GPIO */
808 /* output */
809 PPDR |= PPC_TXD2;
810 PSDR |= PPC_TXD2;
811 /* set output to 0 */
812 off();
813
814 /* Enable HP-SIR modulation, and ensure that the port is disabled. */
815 Ser2UTCR3 = 0;
816 Ser2HSCR0 = sr.hscr0 & (~HSCR0_HSSP);
817
818 /* clear status register to prevent unwanted interrupts */
819 Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
820
821 /* 7N1 */
822 Ser2UTCR0 = UTCR0_1StpBit|UTCR0_7BitData;
823 /* 115200 */
824 Ser2UTCR1 = 0;
825 Ser2UTCR2 = 1;
826 /* use HPSIR, 1.6 usec pulses */
827 Ser2UTCR4 = UTCR4_HPSIR|UTCR4_Z1_6us;
828
829 /* enable receiver, receive fifo interrupt */
830 Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
831
832 /* clear status register to prevent unwanted interrupts */
833 Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
834
835 #elif defined(LIRC_SIR_TEKRAM)
836 /* disable FIFO */
837 soutp(UART_FCR,
838 UART_FCR_CLEAR_RCVR|
839 UART_FCR_CLEAR_XMIT|
840 UART_FCR_TRIGGER_1);
841
842 /* Set DLAB 0. */
843 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
844
845 /* First of all, disable all interrupts */
846 soutp(UART_IER, sinp(UART_IER) &
847 (~(UART_IER_MSI|UART_IER_RLSI|UART_IER_THRI|UART_IER_RDI)));
848
849 /* Set DLAB 1. */
850 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
851
852 /* Set divisor to 12 => 9600 Baud */
853 soutp(UART_DLM, 0);
854 soutp(UART_DLL, 12);
855
856 /* Set DLAB 0. */
857 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
858
859 /* power supply */
860 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
861 safe_udelay(50*1000);
862
863 /* -DTR low -> reset PIC */
864 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
865 udelay(1*1000);
866
867 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
868 udelay(100);
869
870
871 /* -RTS low -> send control byte */
872 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
873 udelay(7);
874 soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
875
876 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
877 udelay(1500);
878
879 /* back to normal operation */
880 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
881 udelay(50);
882
883 udelay(1500);
884
885 /* read previous control byte */
886 printk(KERN_INFO LIRC_DRIVER_NAME
887 ": 0x%02x\n", sinp(UART_RX));
888
889 /* Set DLAB 1. */
890 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
891
892 /* Set divisor to 1 => 115200 Baud */
893 soutp(UART_DLM, 0);
894 soutp(UART_DLL, 1);
895
896 /* Set DLAB 0, 8 Bit */
897 soutp(UART_LCR, UART_LCR_WLEN8);
898 /* enable interrupts */
899 soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
900 #else
901 outb(0, io + UART_MCR);
902 outb(0, io + UART_IER);
903 /* init UART */
904 /* set DLAB, speed = 115200 */
905 outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
906 outb(1, io + UART_DLL); outb(0, io + UART_DLM);
907 /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
908 outb(UART_LCR_WLEN7, io + UART_LCR);
909 /* FIFO operation */
910 outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
911 /* interrupts */
912 /* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
913 outb(UART_IER_RDI, io + UART_IER);
914 /* turn on UART */
915 outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
916 #ifdef LIRC_SIR_ACTISYS_ACT200L
917 init_act200();
918 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
919 init_act220();
920 #endif
921 #endif
922 spin_unlock_irqrestore(&hardware_lock, flags);
923 return 0;
924 }
925
926 static void drop_hardware(void)
927 {
928 unsigned long flags;
929
930 spin_lock_irqsave(&hardware_lock, flags);
931
932 #ifdef LIRC_ON_SA1100
933 Ser2UTCR3 = 0;
934
935 Ser2UTCR0 = sr.utcr0;
936 Ser2UTCR1 = sr.utcr1;
937 Ser2UTCR2 = sr.utcr2;
938 Ser2UTCR4 = sr.utcr4;
939 Ser2UTCR3 = sr.utcr3;
940
941 Ser2HSCR0 = sr.hscr0;
942 #ifdef CONFIG_SA1100_BITSY
943 if (machine_is_bitsy())
944 clr_bitsy_egpio(EGPIO_BITSY_IR_ON);
945 #endif
946 #ifdef CONFIG_SA1100_COLLIE
947 sa1100_irda_set_power_collie(0); /* power off */
948 #endif
949 #else
950 /* turn off interrupts */
951 outb(0, io + UART_IER);
952 #endif
953 spin_unlock_irqrestore(&hardware_lock, flags);
954 }
955
956 /* SECTION: Initialisation */
957
958 static int init_port(void)
959 {
960 int retval;
961
962 /* get I/O port access and IRQ line */
963 #ifndef LIRC_ON_SA1100
964 if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
965 printk(KERN_ERR LIRC_DRIVER_NAME
966 ": i/o port 0x%.4x already in use.\n", io);
967 return -EBUSY;
968 }
969 #endif
970 retval = request_irq(irq, sir_interrupt, IRQF_DISABLED,
971 LIRC_DRIVER_NAME, NULL);
972 if (retval < 0) {
973 # ifndef LIRC_ON_SA1100
974 release_region(io, 8);
975 # endif
976 printk(KERN_ERR LIRC_DRIVER_NAME
977 ": IRQ %d already in use.\n",
978 irq);
979 return retval;
980 }
981 #ifndef LIRC_ON_SA1100
982 printk(KERN_INFO LIRC_DRIVER_NAME
983 ": I/O port 0x%.4x, IRQ %d.\n",
984 io, irq);
985 #endif
986
987 init_timer(&timerlist);
988 timerlist.function = sir_timeout;
989 timerlist.data = 0xabadcafe;
990
991 return 0;
992 }
993
994 static void drop_port(void)
995 {
996 free_irq(irq, NULL);
997 del_timer_sync(&timerlist);
998 #ifndef LIRC_ON_SA1100
999 release_region(io, 8);
1000 #endif
1001 }
1002
1003 #ifdef LIRC_SIR_ACTISYS_ACT200L
1004 /* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
1005 /* some code borrowed from Linux IRDA driver */
1006
1007 /* Register 0: Control register #1 */
1008 #define ACT200L_REG0 0x00
1009 #define ACT200L_TXEN 0x01 /* Enable transmitter */
1010 #define ACT200L_RXEN 0x02 /* Enable receiver */
1011 #define ACT200L_ECHO 0x08 /* Echo control chars */
1012
1013 /* Register 1: Control register #2 */
1014 #define ACT200L_REG1 0x10
1015 #define ACT200L_LODB 0x01 /* Load new baud rate count value */
1016 #define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
1017
1018 /* Register 3: Transmit mode register #2 */
1019 #define ACT200L_REG3 0x30
1020 #define ACT200L_B0 0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
1021 #define ACT200L_B1 0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
1022 #define ACT200L_CHSY 0x04 /* StartBit Synced 0=bittime, 1=startbit */
1023
1024 /* Register 4: Output Power register */
1025 #define ACT200L_REG4 0x40
1026 #define ACT200L_OP0 0x01 /* Enable LED1C output */
1027 #define ACT200L_OP1 0x02 /* Enable LED2C output */
1028 #define ACT200L_BLKR 0x04
1029
1030 /* Register 5: Receive Mode register */
1031 #define ACT200L_REG5 0x50
1032 #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
1033 /*.. other various IRDA bit modes, and TV remote modes..*/
1034
1035 /* Register 6: Receive Sensitivity register #1 */
1036 #define ACT200L_REG6 0x60
1037 #define ACT200L_RS0 0x01 /* receive threshold bit 0 */
1038 #define ACT200L_RS1 0x02 /* receive threshold bit 1 */
1039
1040 /* Register 7: Receive Sensitivity register #2 */
1041 #define ACT200L_REG7 0x70
1042 #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
1043
1044 /* Register 8,9: Baud Rate Divider register #1,#2 */
1045 #define ACT200L_REG8 0x80
1046 #define ACT200L_REG9 0x90
1047
1048 #define ACT200L_2400 0x5f
1049 #define ACT200L_9600 0x17
1050 #define ACT200L_19200 0x0b
1051 #define ACT200L_38400 0x05
1052 #define ACT200L_57600 0x03
1053 #define ACT200L_115200 0x01
1054
1055 /* Register 13: Control register #3 */
1056 #define ACT200L_REG13 0xd0
1057 #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
1058
1059 /* Register 15: Status register */
1060 #define ACT200L_REG15 0xf0
1061
1062 /* Register 21: Control register #4 */
1063 #define ACT200L_REG21 0x50
1064 #define ACT200L_EXCK 0x02 /* Disable clock output driver */
1065 #define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
1066
1067 static void init_act200(void)
1068 {
1069 int i;
1070 __u8 control[] = {
1071 ACT200L_REG15,
1072 ACT200L_REG13 | ACT200L_SHDW,
1073 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
1074 ACT200L_REG13,
1075 ACT200L_REG7 | ACT200L_ENPOS,
1076 ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
1077 ACT200L_REG5 | ACT200L_RWIDL,
1078 ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
1079 ACT200L_REG3 | ACT200L_B0,
1080 ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN,
1081 ACT200L_REG8 | (ACT200L_115200 & 0x0f),
1082 ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
1083 ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
1084 };
1085
1086 /* Set DLAB 1. */
1087 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
1088
1089 /* Set divisor to 12 => 9600 Baud */
1090 soutp(UART_DLM, 0);
1091 soutp(UART_DLL, 12);
1092
1093 /* Set DLAB 0. */
1094 soutp(UART_LCR, UART_LCR_WLEN8);
1095 /* Set divisor to 12 => 9600 Baud */
1096
1097 /* power supply */
1098 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1099 for (i = 0; i < 50; i++)
1100 safe_udelay(1000);
1101
1102 /* Reset the dongle : set RTS low for 25 ms */
1103 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1104 for (i = 0; i < 25; i++)
1105 udelay(1000);
1106
1107 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1108 udelay(100);
1109
1110 /* Clear DTR and set RTS to enter command mode */
1111 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1112 udelay(7);
1113
1114 /* send out the control register settings for 115K 7N1 SIR operation */
1115 for (i = 0; i < sizeof(control); i++) {
1116 soutp(UART_TX, control[i]);
1117 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
1118 udelay(1500);
1119 }
1120
1121 /* back to normal operation */
1122 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1123 udelay(50);
1124
1125 udelay(1500);
1126 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
1127
1128 /* Set DLAB 1. */
1129 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1130
1131 /* Set divisor to 1 => 115200 Baud */
1132 soutp(UART_DLM, 0);
1133 soutp(UART_DLL, 1);
1134
1135 /* Set DLAB 0. */
1136 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
1137
1138 /* Set DLAB 0, 7 Bit */
1139 soutp(UART_LCR, UART_LCR_WLEN7);
1140
1141 /* enable interrupts */
1142 soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
1143 }
1144 #endif
1145
1146 #ifdef LIRC_SIR_ACTISYS_ACT220L
1147 /*
1148 * Derived from linux IrDA driver (net/irda/actisys.c)
1149 * Drop me a mail for any kind of comment: maxx@spaceboyz.net
1150 */
1151
1152 void init_act220(void)
1153 {
1154 int i;
1155
1156 /* DLAB 1 */
1157 soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
1158
1159 /* 9600 baud */
1160 soutp(UART_DLM, 0);
1161 soutp(UART_DLL, 12);
1162
1163 /* DLAB 0 */
1164 soutp(UART_LCR, UART_LCR_WLEN7);
1165
1166 /* reset the dongle, set DTR low for 10us */
1167 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1168 udelay(10);
1169
1170 /* back to normal (still 9600) */
1171 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
1172
1173 /*
1174 * send RTS pulses until we reach 115200
1175 * i hope this is really the same for act220l/act220l+
1176 */
1177 for (i = 0; i < 3; i++) {
1178 udelay(10);
1179 /* set RTS low for 10 us */
1180 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1181 udelay(10);
1182 /* set RTS high for 10 us */
1183 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1184 }
1185
1186 /* back to normal operation */
1187 udelay(1500); /* better safe than sorry ;) */
1188
1189 /* Set DLAB 1. */
1190 soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1191
1192 /* Set divisor to 1 => 115200 Baud */
1193 soutp(UART_DLM, 0);
1194 soutp(UART_DLL, 1);
1195
1196 /* Set DLAB 0, 7 Bit */
1197 /* The dongle doesn't seem to have any problems with operation at 7N1 */
1198 soutp(UART_LCR, UART_LCR_WLEN7);
1199
1200 /* enable interrupts */
1201 soutp(UART_IER, UART_IER_RDI);
1202 }
1203 #endif
1204
1205 static int init_lirc_sir(void)
1206 {
1207 int retval;
1208
1209 init_waitqueue_head(&lirc_read_queue);
1210 retval = init_port();
1211 if (retval < 0)
1212 return retval;
1213 init_hardware();
1214 printk(KERN_INFO LIRC_DRIVER_NAME
1215 ": Installed.\n");
1216 return 0;
1217 }
1218
1219
1220 static int __init lirc_sir_init(void)
1221 {
1222 int retval;
1223
1224 retval = init_chrdev();
1225 if (retval < 0)
1226 return retval;
1227 retval = init_lirc_sir();
1228 if (retval) {
1229 drop_chrdev();
1230 return retval;
1231 }
1232 return 0;
1233 }
1234
1235 static void __exit lirc_sir_exit(void)
1236 {
1237 drop_hardware();
1238 drop_chrdev();
1239 drop_port();
1240 printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n");
1241 }
1242
1243 module_init(lirc_sir_init);
1244 module_exit(lirc_sir_exit);
1245
1246 #ifdef LIRC_SIR_TEKRAM
1247 MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
1248 MODULE_AUTHOR("Christoph Bartelmus");
1249 #elif defined(LIRC_ON_SA1100)
1250 MODULE_DESCRIPTION("LIRC driver for StrongARM SA1100 embedded microprocessor");
1251 MODULE_AUTHOR("Christoph Bartelmus");
1252 #elif defined(LIRC_SIR_ACTISYS_ACT200L)
1253 MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
1254 MODULE_AUTHOR("Karl Bongers");
1255 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
1256 MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
1257 MODULE_AUTHOR("Jan Roemisch");
1258 #else
1259 MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
1260 MODULE_AUTHOR("Milan Pikula");
1261 #endif
1262 MODULE_LICENSE("GPL");
1263
1264 #ifdef LIRC_ON_SA1100
1265 module_param(irq, int, S_IRUGO);
1266 MODULE_PARM_DESC(irq, "Interrupt (16)");
1267 #else
1268 module_param(io, int, S_IRUGO);
1269 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
1270
1271 module_param(irq, int, S_IRUGO);
1272 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
1273
1274 module_param(threshold, int, S_IRUGO);
1275 MODULE_PARM_DESC(threshold, "space detection threshold (3)");
1276 #endif
1277
1278 module_param(debug, bool, S_IRUGO | S_IWUSR);
1279 MODULE_PARM_DESC(debug, "Enable debugging messages");
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