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Commit | Line | Data |
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69b1214c JW |
1 | /* |
2 | * i2c IR lirc driver for devices with zilog IR processors | |
3 | * | |
4 | * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de> | |
5 | * modified for PixelView (BT878P+W/FM) by | |
6 | * Michal Kochanowicz <mkochano@pld.org.pl> | |
7 | * Christoph Bartelmus <lirc@bartelmus.de> | |
8 | * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by | |
9 | * Ulrich Mueller <ulrich.mueller42@web.de> | |
10 | * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by | |
11 | * Stefan Jahn <stefan@lkcc.org> | |
12 | * modified for inclusion into kernel sources by | |
13 | * Jerome Brock <jbrock@users.sourceforge.net> | |
14 | * modified for Leadtek Winfast PVR2000 by | |
15 | * Thomas Reitmayr (treitmayr@yahoo.com) | |
16 | * modified for Hauppauge PVR-150 IR TX device by | |
17 | * Mark Weaver <mark@npsl.co.uk> | |
18 | * changed name from lirc_pvr150 to lirc_zilog, works on more than pvr-150 | |
19 | * Jarod Wilson <jarod@redhat.com> | |
20 | * | |
21 | * parts are cut&pasted from the lirc_i2c.c driver | |
22 | * | |
c2790c71 AW |
23 | * Numerous changes updating lirc_zilog.c in kernel 2.6.38 and later are |
24 | * Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net> | |
25 | * | |
69b1214c JW |
26 | * This program is free software; you can redistribute it and/or modify |
27 | * it under the terms of the GNU General Public License as published by | |
28 | * the Free Software Foundation; either version 2 of the License, or | |
29 | * (at your option) any later version. | |
30 | * | |
31 | * This program is distributed in the hope that it will be useful, | |
32 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
33 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
34 | * GNU General Public License for more details. | |
35 | * | |
36 | * You should have received a copy of the GNU General Public License | |
37 | * along with this program; if not, write to the Free Software | |
38 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
39 | * | |
40 | */ | |
41 | ||
69b1214c JW |
42 | #include <linux/module.h> |
43 | #include <linux/kmod.h> | |
44 | #include <linux/kernel.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/fs.h> | |
47 | #include <linux/poll.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/completion.h> | |
52 | #include <linux/errno.h> | |
53 | #include <linux/slab.h> | |
54 | #include <linux/i2c.h> | |
55 | #include <linux/firmware.h> | |
56 | #include <linux/vmalloc.h> | |
57 | ||
58 | #include <linux/mutex.h> | |
59 | #include <linux/kthread.h> | |
60 | ||
61 | #include <media/lirc_dev.h> | |
62 | #include <media/lirc.h> | |
63 | ||
ac5b4b6b MCC |
64 | /* Max transfer size done by I2C transfer functions */ |
65 | #define MAX_XFER_SIZE 64 | |
66 | ||
5bd6b046 AW |
67 | struct IR; |
68 | ||
06da95a3 | 69 | struct IR_rx { |
5bd6b046 AW |
70 | struct kref ref; |
71 | struct IR *ir; | |
72 | ||
69b1214c | 73 | /* RX device */ |
d6dbd939 | 74 | struct mutex client_lock; |
e9b351f6 | 75 | struct i2c_client *c; |
69b1214c | 76 | |
69b1214c | 77 | /* RX polling thread data */ |
69b1214c JW |
78 | struct task_struct *task; |
79 | ||
80 | /* RX read data */ | |
81 | unsigned char b[3]; | |
06da95a3 AW |
82 | bool hdpvr_data_fmt; |
83 | }; | |
69b1214c | 84 | |
06da95a3 | 85 | struct IR_tx { |
5bd6b046 AW |
86 | struct kref ref; |
87 | struct IR *ir; | |
88 | ||
69b1214c | 89 | /* TX device */ |
d6dbd939 | 90 | struct mutex client_lock; |
e9b351f6 | 91 | struct i2c_client *c; |
06da95a3 AW |
92 | |
93 | /* TX additional actions needed */ | |
69b1214c | 94 | int need_boot; |
06da95a3 AW |
95 | bool post_tx_ready_poll; |
96 | }; | |
97 | ||
98 | struct IR { | |
5bd6b046 | 99 | struct kref ref; |
5c07134f AW |
100 | struct list_head list; |
101 | ||
5bd6b046 | 102 | /* FIXME spinlock access to l.features */ |
06da95a3 | 103 | struct lirc_driver l; |
bcbd1655 | 104 | struct lirc_buffer rbuf; |
06da95a3 AW |
105 | |
106 | struct mutex ir_lock; | |
a3064855 | 107 | atomic_t open_count; |
06da95a3 | 108 | |
a68a9b73 | 109 | struct i2c_adapter *adapter; |
5bd6b046 AW |
110 | |
111 | spinlock_t rx_ref_lock; /* struct IR_rx kref get()/put() */ | |
06da95a3 | 112 | struct IR_rx *rx; |
5bd6b046 AW |
113 | |
114 | spinlock_t tx_ref_lock; /* struct IR_tx kref get()/put() */ | |
06da95a3 | 115 | struct IR_tx *tx; |
69b1214c JW |
116 | }; |
117 | ||
5c07134f | 118 | /* IR transceiver instance object list */ |
5bd6b046 AW |
119 | /* |
120 | * This lock is used for the following: | |
121 | * a. ir_devices_list access, insertions, deletions | |
122 | * b. struct IR kref get()s and put()s | |
123 | * c. serialization of ir_probe() for the two i2c_clients for a Z8 | |
124 | */ | |
5c07134f AW |
125 | static DEFINE_MUTEX(ir_devices_lock); |
126 | static LIST_HEAD(ir_devices_list); | |
69b1214c JW |
127 | |
128 | /* Block size for IR transmitter */ | |
129 | #define TX_BLOCK_SIZE 99 | |
130 | ||
131 | /* Hauppauge IR transmitter data */ | |
132 | struct tx_data_struct { | |
133 | /* Boot block */ | |
134 | unsigned char *boot_data; | |
135 | ||
136 | /* Start of binary data block */ | |
137 | unsigned char *datap; | |
138 | ||
139 | /* End of binary data block */ | |
140 | unsigned char *endp; | |
141 | ||
142 | /* Number of installed codesets */ | |
143 | unsigned int num_code_sets; | |
144 | ||
145 | /* Pointers to codesets */ | |
146 | unsigned char **code_sets; | |
147 | ||
148 | /* Global fixed data template */ | |
149 | int fixed[TX_BLOCK_SIZE]; | |
150 | }; | |
151 | ||
152 | static struct tx_data_struct *tx_data; | |
153 | static struct mutex tx_data_lock; | |
154 | ||
69b1214c | 155 | |
69b1214c | 156 | /* module parameters */ |
90ab5ee9 RR |
157 | static bool debug; /* debug output */ |
158 | static bool tx_only; /* only handle the IR Tx function */ | |
69b1214c JW |
159 | static int minor = -1; /* minor number */ |
160 | ||
5bd6b046 AW |
161 | |
162 | /* struct IR reference counting */ | |
163 | static struct IR *get_ir_device(struct IR *ir, bool ir_devices_lock_held) | |
164 | { | |
165 | if (ir_devices_lock_held) { | |
166 | kref_get(&ir->ref); | |
167 | } else { | |
168 | mutex_lock(&ir_devices_lock); | |
169 | kref_get(&ir->ref); | |
170 | mutex_unlock(&ir_devices_lock); | |
171 | } | |
172 | return ir; | |
173 | } | |
174 | ||
175 | static void release_ir_device(struct kref *ref) | |
176 | { | |
177 | struct IR *ir = container_of(ref, struct IR, ref); | |
178 | ||
179 | /* | |
180 | * Things should be in this state by now: | |
181 | * ir->rx set to NULL and deallocated - happens before ir->rx->ir put() | |
182 | * ir->rx->task kthread stopped - happens before ir->rx->ir put() | |
183 | * ir->tx set to NULL and deallocated - happens before ir->tx->ir put() | |
184 | * ir->open_count == 0 - happens on final close() | |
185 | * ir_lock, tx_ref_lock, rx_ref_lock, all released | |
186 | */ | |
187 | if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) { | |
188 | lirc_unregister_driver(ir->l.minor); | |
189 | ir->l.minor = MAX_IRCTL_DEVICES; | |
190 | } | |
77d381af | 191 | if (kfifo_initialized(&ir->rbuf.fifo)) |
5bd6b046 AW |
192 | lirc_buffer_free(&ir->rbuf); |
193 | list_del(&ir->list); | |
194 | kfree(ir); | |
195 | } | |
196 | ||
197 | static int put_ir_device(struct IR *ir, bool ir_devices_lock_held) | |
198 | { | |
199 | int released; | |
200 | ||
201 | if (ir_devices_lock_held) | |
202 | return kref_put(&ir->ref, release_ir_device); | |
203 | ||
204 | mutex_lock(&ir_devices_lock); | |
205 | released = kref_put(&ir->ref, release_ir_device); | |
206 | mutex_unlock(&ir_devices_lock); | |
207 | ||
208 | return released; | |
209 | } | |
210 | ||
211 | /* struct IR_rx reference counting */ | |
212 | static struct IR_rx *get_ir_rx(struct IR *ir) | |
213 | { | |
214 | struct IR_rx *rx; | |
215 | ||
216 | spin_lock(&ir->rx_ref_lock); | |
217 | rx = ir->rx; | |
218 | if (rx != NULL) | |
219 | kref_get(&rx->ref); | |
220 | spin_unlock(&ir->rx_ref_lock); | |
221 | return rx; | |
222 | } | |
223 | ||
224 | static void destroy_rx_kthread(struct IR_rx *rx, bool ir_devices_lock_held) | |
225 | { | |
226 | /* end up polling thread */ | |
227 | if (!IS_ERR_OR_NULL(rx->task)) { | |
228 | kthread_stop(rx->task); | |
229 | rx->task = NULL; | |
230 | /* Put the ir ptr that ir_probe() gave to the rx poll thread */ | |
231 | put_ir_device(rx->ir, ir_devices_lock_held); | |
232 | } | |
233 | } | |
234 | ||
235 | static void release_ir_rx(struct kref *ref) | |
236 | { | |
237 | struct IR_rx *rx = container_of(ref, struct IR_rx, ref); | |
238 | struct IR *ir = rx->ir; | |
239 | ||
240 | /* | |
241 | * This release function can't do all the work, as we want | |
242 | * to keep the rx_ref_lock a spinlock, and killing the poll thread | |
243 | * and releasing the ir reference can cause a sleep. That work is | |
244 | * performed by put_ir_rx() | |
245 | */ | |
246 | ir->l.features &= ~LIRC_CAN_REC_LIRCCODE; | |
247 | /* Don't put_ir_device(rx->ir) here; lock can't be freed yet */ | |
248 | ir->rx = NULL; | |
249 | /* Don't do the kfree(rx) here; we still need to kill the poll thread */ | |
5bd6b046 AW |
250 | } |
251 | ||
252 | static int put_ir_rx(struct IR_rx *rx, bool ir_devices_lock_held) | |
253 | { | |
254 | int released; | |
255 | struct IR *ir = rx->ir; | |
256 | ||
257 | spin_lock(&ir->rx_ref_lock); | |
258 | released = kref_put(&rx->ref, release_ir_rx); | |
259 | spin_unlock(&ir->rx_ref_lock); | |
260 | /* Destroy the rx kthread while not holding the spinlock */ | |
261 | if (released) { | |
262 | destroy_rx_kthread(rx, ir_devices_lock_held); | |
263 | kfree(rx); | |
264 | /* Make sure we're not still in a poll_table somewhere */ | |
265 | wake_up_interruptible(&ir->rbuf.wait_poll); | |
266 | } | |
267 | /* Do a reference put() for the rx->ir reference, if we released rx */ | |
268 | if (released) | |
269 | put_ir_device(ir, ir_devices_lock_held); | |
270 | return released; | |
271 | } | |
272 | ||
273 | /* struct IR_tx reference counting */ | |
274 | static struct IR_tx *get_ir_tx(struct IR *ir) | |
275 | { | |
276 | struct IR_tx *tx; | |
277 | ||
278 | spin_lock(&ir->tx_ref_lock); | |
279 | tx = ir->tx; | |
280 | if (tx != NULL) | |
281 | kref_get(&tx->ref); | |
282 | spin_unlock(&ir->tx_ref_lock); | |
283 | return tx; | |
284 | } | |
285 | ||
286 | static void release_ir_tx(struct kref *ref) | |
287 | { | |
288 | struct IR_tx *tx = container_of(ref, struct IR_tx, ref); | |
289 | struct IR *ir = tx->ir; | |
290 | ||
291 | ir->l.features &= ~LIRC_CAN_SEND_PULSE; | |
292 | /* Don't put_ir_device(tx->ir) here, so our lock doesn't get freed */ | |
293 | ir->tx = NULL; | |
294 | kfree(tx); | |
295 | } | |
296 | ||
297 | static int put_ir_tx(struct IR_tx *tx, bool ir_devices_lock_held) | |
298 | { | |
299 | int released; | |
300 | struct IR *ir = tx->ir; | |
301 | ||
302 | spin_lock(&ir->tx_ref_lock); | |
303 | released = kref_put(&tx->ref, release_ir_tx); | |
304 | spin_unlock(&ir->tx_ref_lock); | |
305 | /* Do a reference put() for the tx->ir reference, if we released tx */ | |
306 | if (released) | |
307 | put_ir_device(ir, ir_devices_lock_held); | |
308 | return released; | |
309 | } | |
310 | ||
69b1214c JW |
311 | static int add_to_buf(struct IR *ir) |
312 | { | |
313 | __u16 code; | |
314 | unsigned char codes[2]; | |
315 | unsigned char keybuf[6]; | |
316 | int got_data = 0; | |
317 | int ret; | |
318 | int failures = 0; | |
319 | unsigned char sendbuf[1] = { 0 }; | |
bcbd1655 | 320 | struct lirc_buffer *rbuf = ir->l.rbuf; |
5bd6b046 AW |
321 | struct IR_rx *rx; |
322 | struct IR_tx *tx; | |
69b1214c | 323 | |
bcbd1655 | 324 | if (lirc_buffer_full(rbuf)) { |
be4aa815 | 325 | dev_dbg(ir->l.dev, "buffer overflow\n"); |
69b1214c JW |
326 | return -EOVERFLOW; |
327 | } | |
328 | ||
5bd6b046 AW |
329 | rx = get_ir_rx(ir); |
330 | if (rx == NULL) | |
331 | return -ENXIO; | |
332 | ||
d6dbd939 AW |
333 | /* Ensure our rx->c i2c_client remains valid for the duration */ |
334 | mutex_lock(&rx->client_lock); | |
335 | if (rx->c == NULL) { | |
336 | mutex_unlock(&rx->client_lock); | |
337 | put_ir_rx(rx, false); | |
338 | return -ENXIO; | |
339 | } | |
340 | ||
5bd6b046 AW |
341 | tx = get_ir_tx(ir); |
342 | ||
69b1214c JW |
343 | /* |
344 | * service the device as long as it is returning | |
345 | * data and we have space | |
346 | */ | |
347 | do { | |
5bd6b046 AW |
348 | if (kthread_should_stop()) { |
349 | ret = -ENODATA; | |
350 | break; | |
351 | } | |
b757730b | 352 | |
69b1214c JW |
353 | /* |
354 | * Lock i2c bus for the duration. RX/TX chips interfere so | |
355 | * this is worth it | |
356 | */ | |
357 | mutex_lock(&ir->ir_lock); | |
358 | ||
b757730b AW |
359 | if (kthread_should_stop()) { |
360 | mutex_unlock(&ir->ir_lock); | |
5bd6b046 AW |
361 | ret = -ENODATA; |
362 | break; | |
b757730b AW |
363 | } |
364 | ||
69b1214c JW |
365 | /* |
366 | * Send random "poll command" (?) Windows driver does this | |
367 | * and it is a good point to detect chip failure. | |
368 | */ | |
e9b351f6 | 369 | ret = i2c_master_send(rx->c, sendbuf, 1); |
69b1214c | 370 | if (ret != 1) { |
be4aa815 | 371 | dev_err(ir->l.dev, "i2c_master_send failed with %d\n", |
2ecd4240 | 372 | ret); |
69b1214c JW |
373 | if (failures >= 3) { |
374 | mutex_unlock(&ir->ir_lock); | |
221ca912 LB |
375 | dev_err(ir->l.dev, |
376 | "unable to read from the IR chip after 3 resets, giving up\n"); | |
5bd6b046 | 377 | break; |
69b1214c JW |
378 | } |
379 | ||
380 | /* Looks like the chip crashed, reset it */ | |
221ca912 LB |
381 | dev_err(ir->l.dev, |
382 | "polling the IR receiver chip failed, trying reset\n"); | |
69b1214c JW |
383 | |
384 | set_current_state(TASK_UNINTERRUPTIBLE); | |
b757730b AW |
385 | if (kthread_should_stop()) { |
386 | mutex_unlock(&ir->ir_lock); | |
5bd6b046 AW |
387 | ret = -ENODATA; |
388 | break; | |
b757730b | 389 | } |
69b1214c | 390 | schedule_timeout((100 * HZ + 999) / 1000); |
5bd6b046 AW |
391 | if (tx != NULL) |
392 | tx->need_boot = 1; | |
69b1214c JW |
393 | |
394 | ++failures; | |
395 | mutex_unlock(&ir->ir_lock); | |
5bd6b046 | 396 | ret = 0; |
69b1214c JW |
397 | continue; |
398 | } | |
399 | ||
b757730b AW |
400 | if (kthread_should_stop()) { |
401 | mutex_unlock(&ir->ir_lock); | |
5bd6b046 AW |
402 | ret = -ENODATA; |
403 | break; | |
b757730b | 404 | } |
e9b351f6 | 405 | ret = i2c_master_recv(rx->c, keybuf, sizeof(keybuf)); |
69b1214c JW |
406 | mutex_unlock(&ir->ir_lock); |
407 | if (ret != sizeof(keybuf)) { | |
221ca912 LB |
408 | dev_err(ir->l.dev, |
409 | "i2c_master_recv failed with %d -- keeping last read buffer\n", | |
410 | ret); | |
69b1214c | 411 | } else { |
06da95a3 AW |
412 | rx->b[0] = keybuf[3]; |
413 | rx->b[1] = keybuf[4]; | |
414 | rx->b[2] = keybuf[5]; | |
2ecd4240 LB |
415 | dev_dbg(ir->l.dev, |
416 | "key (0x%02x/0x%02x)\n", | |
417 | rx->b[0], rx->b[1]); | |
69b1214c JW |
418 | } |
419 | ||
420 | /* key pressed ? */ | |
06da95a3 | 421 | if (rx->hdpvr_data_fmt) { |
5bd6b046 AW |
422 | if (got_data && (keybuf[0] == 0x80)) { |
423 | ret = 0; | |
424 | break; | |
425 | } else if (got_data && (keybuf[0] == 0x00)) { | |
426 | ret = -ENODATA; | |
427 | break; | |
428 | } | |
429 | } else if ((rx->b[0] & 0x80) == 0) { | |
430 | ret = got_data ? 0 : -ENODATA; | |
431 | break; | |
432 | } | |
69b1214c JW |
433 | |
434 | /* look what we have */ | |
06da95a3 | 435 | code = (((__u16)rx->b[0] & 0x7f) << 6) | (rx->b[1] >> 2); |
69b1214c JW |
436 | |
437 | codes[0] = (code >> 8) & 0xff; | |
438 | codes[1] = code & 0xff; | |
439 | ||
440 | /* return it */ | |
bcbd1655 | 441 | lirc_buffer_write(rbuf, codes); |
69b1214c | 442 | ++got_data; |
5bd6b046 | 443 | ret = 0; |
bcbd1655 | 444 | } while (!lirc_buffer_full(rbuf)); |
69b1214c | 445 | |
d6dbd939 | 446 | mutex_unlock(&rx->client_lock); |
5bd6b046 AW |
447 | if (tx != NULL) |
448 | put_ir_tx(tx, false); | |
449 | put_ir_rx(rx, false); | |
450 | return ret; | |
69b1214c JW |
451 | } |
452 | ||
453 | /* | |
454 | * Main function of the polling thread -- from lirc_dev. | |
455 | * We don't fit the LIRC model at all anymore. This is horrible, but | |
456 | * basically we have a single RX/TX device with a nasty failure mode | |
457 | * that needs to be accounted for across the pair. lirc lets us provide | |
458 | * fops, but prevents us from using the internal polling, etc. if we do | |
459 | * so. Hence the replication. Might be neater to extend the LIRC model | |
460 | * to account for this but I'd think it's a very special case of seriously | |
461 | * messed up hardware. | |
462 | */ | |
463 | static int lirc_thread(void *arg) | |
464 | { | |
465 | struct IR *ir = arg; | |
bcbd1655 | 466 | struct lirc_buffer *rbuf = ir->l.rbuf; |
69b1214c | 467 | |
be4aa815 | 468 | dev_dbg(ir->l.dev, "poll thread started\n"); |
69b1214c | 469 | |
b757730b | 470 | while (!kthread_should_stop()) { |
6a8c97ac JW |
471 | set_current_state(TASK_INTERRUPTIBLE); |
472 | ||
b757730b | 473 | /* if device not opened, we can sleep half a second */ |
a3064855 | 474 | if (atomic_read(&ir->open_count) == 0) { |
69b1214c | 475 | schedule_timeout(HZ/2); |
b757730b | 476 | continue; |
69b1214c | 477 | } |
69b1214c | 478 | |
b757730b AW |
479 | /* |
480 | * This is ~113*2 + 24 + jitter (2*repeat gap + code length). | |
481 | * We use this interval as the chip resets every time you poll | |
482 | * it (bad!). This is therefore just sufficient to catch all | |
483 | * of the button presses. It makes the remote much more | |
484 | * responsive. You can see the difference by running irw and | |
485 | * holding down a button. With 100ms, the old polling | |
486 | * interval, you'll notice breaks in the repeat sequence | |
487 | * corresponding to lost keypresses. | |
488 | */ | |
489 | schedule_timeout((260 * HZ) / 1000); | |
490 | if (kthread_should_stop()) | |
491 | break; | |
492 | if (!add_to_buf(ir)) | |
bcbd1655 | 493 | wake_up_interruptible(&rbuf->wait_poll); |
b757730b | 494 | } |
69b1214c | 495 | |
be4aa815 | 496 | dev_dbg(ir->l.dev, "poll thread ended\n"); |
69b1214c JW |
497 | return 0; |
498 | } | |
499 | ||
500 | static int set_use_inc(void *data) | |
501 | { | |
69b1214c JW |
502 | return 0; |
503 | } | |
504 | ||
505 | static void set_use_dec(void *data) | |
506 | { | |
69b1214c JW |
507 | } |
508 | ||
509 | /* safe read of a uint32 (always network byte order) */ | |
510 | static int read_uint32(unsigned char **data, | |
511 | unsigned char *endp, unsigned int *val) | |
512 | { | |
513 | if (*data + 4 > endp) | |
514 | return 0; | |
515 | *val = ((*data)[0] << 24) | ((*data)[1] << 16) | | |
516 | ((*data)[2] << 8) | (*data)[3]; | |
517 | *data += 4; | |
518 | return 1; | |
519 | } | |
520 | ||
521 | /* safe read of a uint8 */ | |
522 | static int read_uint8(unsigned char **data, | |
523 | unsigned char *endp, unsigned char *val) | |
524 | { | |
525 | if (*data + 1 > endp) | |
526 | return 0; | |
527 | *val = *((*data)++); | |
528 | return 1; | |
529 | } | |
530 | ||
531 | /* safe skipping of N bytes */ | |
532 | static int skip(unsigned char **data, | |
533 | unsigned char *endp, unsigned int distance) | |
534 | { | |
535 | if (*data + distance > endp) | |
536 | return 0; | |
537 | *data += distance; | |
538 | return 1; | |
539 | } | |
540 | ||
541 | /* decompress key data into the given buffer */ | |
542 | static int get_key_data(unsigned char *buf, | |
543 | unsigned int codeset, unsigned int key) | |
544 | { | |
545 | unsigned char *data, *endp, *diffs, *key_block; | |
546 | unsigned char keys, ndiffs, id; | |
547 | unsigned int base, lim, pos, i; | |
548 | ||
549 | /* Binary search for the codeset */ | |
550 | for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) { | |
551 | pos = base + (lim >> 1); | |
552 | data = tx_data->code_sets[pos]; | |
553 | ||
554 | if (!read_uint32(&data, tx_data->endp, &i)) | |
555 | goto corrupt; | |
556 | ||
557 | if (i == codeset) | |
558 | break; | |
559 | else if (codeset > i) { | |
560 | base = pos + 1; | |
561 | --lim; | |
562 | } | |
563 | } | |
564 | /* Not found? */ | |
565 | if (!lim) | |
566 | return -EPROTO; | |
567 | ||
568 | /* Set end of data block */ | |
569 | endp = pos < tx_data->num_code_sets - 1 ? | |
570 | tx_data->code_sets[pos + 1] : tx_data->endp; | |
571 | ||
572 | /* Read the block header */ | |
573 | if (!read_uint8(&data, endp, &keys) || | |
574 | !read_uint8(&data, endp, &ndiffs) || | |
575 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
576 | goto corrupt; | |
577 | ||
578 | /* Save diffs & skip */ | |
579 | diffs = data; | |
580 | if (!skip(&data, endp, ndiffs)) | |
581 | goto corrupt; | |
582 | ||
583 | /* Read the id of the first key */ | |
584 | if (!read_uint8(&data, endp, &id)) | |
585 | goto corrupt; | |
586 | ||
587 | /* Unpack the first key's data */ | |
588 | for (i = 0; i < TX_BLOCK_SIZE; ++i) { | |
589 | if (tx_data->fixed[i] == -1) { | |
590 | if (!read_uint8(&data, endp, &buf[i])) | |
591 | goto corrupt; | |
592 | } else { | |
593 | buf[i] = (unsigned char)tx_data->fixed[i]; | |
594 | } | |
595 | } | |
596 | ||
597 | /* Early out key found/not found */ | |
598 | if (key == id) | |
599 | return 0; | |
600 | if (keys == 1) | |
601 | return -EPROTO; | |
602 | ||
603 | /* Sanity check */ | |
604 | key_block = data; | |
605 | if (!skip(&data, endp, (keys - 1) * (ndiffs + 1))) | |
606 | goto corrupt; | |
607 | ||
608 | /* Binary search for the key */ | |
609 | for (base = 0, lim = keys - 1; lim; lim >>= 1) { | |
610 | /* Seek to block */ | |
611 | unsigned char *key_data; | |
fd8392f3 | 612 | |
69b1214c JW |
613 | pos = base + (lim >> 1); |
614 | key_data = key_block + (ndiffs + 1) * pos; | |
615 | ||
616 | if (*key_data == key) { | |
617 | /* skip key id */ | |
618 | ++key_data; | |
619 | ||
620 | /* found, so unpack the diffs */ | |
621 | for (i = 0; i < ndiffs; ++i) { | |
622 | unsigned char val; | |
fd8392f3 | 623 | |
69b1214c JW |
624 | if (!read_uint8(&key_data, endp, &val) || |
625 | diffs[i] >= TX_BLOCK_SIZE) | |
626 | goto corrupt; | |
627 | buf[diffs[i]] = val; | |
628 | } | |
629 | ||
630 | return 0; | |
631 | } else if (key > *key_data) { | |
632 | base = pos + 1; | |
633 | --lim; | |
634 | } | |
635 | } | |
636 | /* Key not found */ | |
637 | return -EPROTO; | |
638 | ||
639 | corrupt: | |
be4aa815 | 640 | pr_err("firmware is corrupt\n"); |
69b1214c JW |
641 | return -EFAULT; |
642 | } | |
643 | ||
644 | /* send a block of data to the IR TX device */ | |
06da95a3 | 645 | static int send_data_block(struct IR_tx *tx, unsigned char *data_block) |
69b1214c JW |
646 | { |
647 | int i, j, ret; | |
648 | unsigned char buf[5]; | |
649 | ||
650 | for (i = 0; i < TX_BLOCK_SIZE;) { | |
651 | int tosend = TX_BLOCK_SIZE - i; | |
fd8392f3 | 652 | |
69b1214c JW |
653 | if (tosend > 4) |
654 | tosend = 4; | |
655 | buf[0] = (unsigned char)(i + 1); | |
656 | for (j = 0; j < tosend; ++j) | |
657 | buf[1 + j] = data_block[i + j]; | |
be4aa815 | 658 | dev_dbg(tx->ir->l.dev, "%*ph", 5, buf); |
e9b351f6 | 659 | ret = i2c_master_send(tx->c, buf, tosend + 1); |
69b1214c | 660 | if (ret != tosend + 1) { |
2ecd4240 LB |
661 | dev_err(tx->ir->l.dev, |
662 | "i2c_master_send failed with %d\n", ret); | |
69b1214c JW |
663 | return ret < 0 ? ret : -EFAULT; |
664 | } | |
665 | i += tosend; | |
666 | } | |
667 | return 0; | |
668 | } | |
669 | ||
670 | /* send boot data to the IR TX device */ | |
06da95a3 | 671 | static int send_boot_data(struct IR_tx *tx) |
69b1214c | 672 | { |
5766d204 | 673 | int ret, i; |
69b1214c JW |
674 | unsigned char buf[4]; |
675 | ||
676 | /* send the boot block */ | |
06da95a3 | 677 | ret = send_data_block(tx, tx_data->boot_data); |
69b1214c JW |
678 | if (ret != 0) |
679 | return ret; | |
680 | ||
5766d204 | 681 | /* Hit the go button to activate the new boot data */ |
69b1214c JW |
682 | buf[0] = 0x00; |
683 | buf[1] = 0x20; | |
e9b351f6 | 684 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 685 | if (ret != 2) { |
be4aa815 | 686 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
687 | return ret < 0 ? ret : -EFAULT; |
688 | } | |
5766d204 JW |
689 | |
690 | /* | |
691 | * Wait for zilog to settle after hitting go post boot block upload. | |
692 | * Without this delay, the HD-PVR and HVR-1950 both return an -EIO | |
693 | * upon attempting to get firmware revision, and tx probe thus fails. | |
694 | */ | |
695 | for (i = 0; i < 10; i++) { | |
696 | ret = i2c_master_send(tx->c, buf, 1); | |
697 | if (ret == 1) | |
698 | break; | |
699 | udelay(100); | |
700 | } | |
701 | ||
69b1214c | 702 | if (ret != 1) { |
be4aa815 | 703 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
704 | return ret < 0 ? ret : -EFAULT; |
705 | } | |
706 | ||
707 | /* Here comes the firmware version... (hopefully) */ | |
e9b351f6 | 708 | ret = i2c_master_recv(tx->c, buf, 4); |
69b1214c | 709 | if (ret != 4) { |
be4aa815 | 710 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
711 | return 0; |
712 | } | |
5766d204 | 713 | if ((buf[0] != 0x80) && (buf[0] != 0xa0)) { |
be4aa815 | 714 | dev_err(tx->ir->l.dev, "unexpected IR TX init response: %02x\n", |
2ecd4240 | 715 | buf[0]); |
69b1214c JW |
716 | return 0; |
717 | } | |
221ca912 LB |
718 | dev_notice(tx->ir->l.dev, |
719 | "Zilog/Hauppauge IR blaster firmware version %d.%d.%d loaded\n", | |
720 | buf[1], buf[2], buf[3]); | |
69b1214c JW |
721 | |
722 | return 0; | |
723 | } | |
724 | ||
725 | /* unload "firmware", lock held */ | |
726 | static void fw_unload_locked(void) | |
727 | { | |
728 | if (tx_data) { | |
e8379ecf | 729 | vfree(tx_data->code_sets); |
69b1214c | 730 | |
e8379ecf | 731 | vfree(tx_data->datap); |
69b1214c JW |
732 | |
733 | vfree(tx_data); | |
734 | tx_data = NULL; | |
be4aa815 | 735 | pr_debug("successfully unloaded IR blaster firmware\n"); |
69b1214c JW |
736 | } |
737 | } | |
738 | ||
739 | /* unload "firmware" for the IR TX device */ | |
740 | static void fw_unload(void) | |
741 | { | |
742 | mutex_lock(&tx_data_lock); | |
743 | fw_unload_locked(); | |
744 | mutex_unlock(&tx_data_lock); | |
745 | } | |
746 | ||
747 | /* load "firmware" for the IR TX device */ | |
06da95a3 | 748 | static int fw_load(struct IR_tx *tx) |
69b1214c JW |
749 | { |
750 | int ret; | |
751 | unsigned int i; | |
752 | unsigned char *data, version, num_global_fixed; | |
753 | const struct firmware *fw_entry; | |
754 | ||
755 | /* Already loaded? */ | |
756 | mutex_lock(&tx_data_lock); | |
757 | if (tx_data) { | |
758 | ret = 0; | |
759 | goto out; | |
760 | } | |
761 | ||
762 | /* Request codeset data file */ | |
5bd6b046 | 763 | ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", tx->ir->l.dev); |
69b1214c | 764 | if (ret != 0) { |
2ecd4240 LB |
765 | dev_err(tx->ir->l.dev, |
766 | "firmware haup-ir-blaster.bin not available (%d)\n", | |
767 | ret); | |
69b1214c JW |
768 | ret = ret < 0 ? ret : -EFAULT; |
769 | goto out; | |
770 | } | |
be4aa815 | 771 | dev_dbg(tx->ir->l.dev, "firmware of size %zu loaded\n", fw_entry->size); |
69b1214c JW |
772 | |
773 | /* Parse the file */ | |
774 | tx_data = vmalloc(sizeof(*tx_data)); | |
775 | if (tx_data == NULL) { | |
69b1214c JW |
776 | release_firmware(fw_entry); |
777 | ret = -ENOMEM; | |
778 | goto out; | |
779 | } | |
780 | tx_data->code_sets = NULL; | |
781 | ||
782 | /* Copy the data so hotplug doesn't get confused and timeout */ | |
783 | tx_data->datap = vmalloc(fw_entry->size); | |
784 | if (tx_data->datap == NULL) { | |
69b1214c JW |
785 | release_firmware(fw_entry); |
786 | vfree(tx_data); | |
787 | ret = -ENOMEM; | |
788 | goto out; | |
789 | } | |
790 | memcpy(tx_data->datap, fw_entry->data, fw_entry->size); | |
791 | tx_data->endp = tx_data->datap + fw_entry->size; | |
792 | release_firmware(fw_entry); fw_entry = NULL; | |
793 | ||
794 | /* Check version */ | |
795 | data = tx_data->datap; | |
796 | if (!read_uint8(&data, tx_data->endp, &version)) | |
797 | goto corrupt; | |
798 | if (version != 1) { | |
221ca912 | 799 | dev_err(tx->ir->l.dev, |
40b8a5a6 | 800 | "unsupported code set file version (%u, expected 1) -- please upgrade to a newer driver\n", |
221ca912 | 801 | version); |
69b1214c JW |
802 | fw_unload_locked(); |
803 | ret = -EFAULT; | |
804 | goto out; | |
805 | } | |
806 | ||
807 | /* Save boot block for later */ | |
808 | tx_data->boot_data = data; | |
809 | if (!skip(&data, tx_data->endp, TX_BLOCK_SIZE)) | |
810 | goto corrupt; | |
811 | ||
812 | if (!read_uint32(&data, tx_data->endp, | |
813 | &tx_data->num_code_sets)) | |
814 | goto corrupt; | |
815 | ||
be4aa815 | 816 | dev_dbg(tx->ir->l.dev, "%u IR blaster codesets loaded\n", |
2ecd4240 | 817 | tx_data->num_code_sets); |
69b1214c JW |
818 | |
819 | tx_data->code_sets = vmalloc( | |
820 | tx_data->num_code_sets * sizeof(char *)); | |
821 | if (tx_data->code_sets == NULL) { | |
822 | fw_unload_locked(); | |
823 | ret = -ENOMEM; | |
824 | goto out; | |
825 | } | |
826 | ||
827 | for (i = 0; i < TX_BLOCK_SIZE; ++i) | |
828 | tx_data->fixed[i] = -1; | |
829 | ||
830 | /* Read global fixed data template */ | |
831 | if (!read_uint8(&data, tx_data->endp, &num_global_fixed) || | |
832 | num_global_fixed > TX_BLOCK_SIZE) | |
833 | goto corrupt; | |
834 | for (i = 0; i < num_global_fixed; ++i) { | |
835 | unsigned char pos, val; | |
fd8392f3 | 836 | |
69b1214c JW |
837 | if (!read_uint8(&data, tx_data->endp, &pos) || |
838 | !read_uint8(&data, tx_data->endp, &val) || | |
839 | pos >= TX_BLOCK_SIZE) | |
840 | goto corrupt; | |
841 | tx_data->fixed[pos] = (int)val; | |
842 | } | |
843 | ||
844 | /* Filch out the position of each code set */ | |
845 | for (i = 0; i < tx_data->num_code_sets; ++i) { | |
846 | unsigned int id; | |
847 | unsigned char keys; | |
848 | unsigned char ndiffs; | |
849 | ||
850 | /* Save the codeset position */ | |
851 | tx_data->code_sets[i] = data; | |
852 | ||
853 | /* Read header */ | |
854 | if (!read_uint32(&data, tx_data->endp, &id) || | |
855 | !read_uint8(&data, tx_data->endp, &keys) || | |
856 | !read_uint8(&data, tx_data->endp, &ndiffs) || | |
857 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
858 | goto corrupt; | |
859 | ||
860 | /* skip diff positions */ | |
861 | if (!skip(&data, tx_data->endp, ndiffs)) | |
862 | goto corrupt; | |
863 | ||
864 | /* | |
865 | * After the diffs we have the first key id + data - | |
866 | * global fixed | |
867 | */ | |
868 | if (!skip(&data, tx_data->endp, | |
869 | 1 + TX_BLOCK_SIZE - num_global_fixed)) | |
870 | goto corrupt; | |
871 | ||
872 | /* Then we have keys-1 blocks of key id+diffs */ | |
873 | if (!skip(&data, tx_data->endp, | |
874 | (ndiffs + 1) * (keys - 1))) | |
875 | goto corrupt; | |
876 | } | |
877 | ret = 0; | |
878 | goto out; | |
879 | ||
880 | corrupt: | |
be4aa815 | 881 | dev_err(tx->ir->l.dev, "firmware is corrupt\n"); |
69b1214c JW |
882 | fw_unload_locked(); |
883 | ret = -EFAULT; | |
884 | ||
885 | out: | |
886 | mutex_unlock(&tx_data_lock); | |
887 | return ret; | |
888 | } | |
889 | ||
69b1214c | 890 | /* copied from lirc_dev */ |
12a72083 TT |
891 | static ssize_t read(struct file *filep, char __user *outbuf, size_t n, |
892 | loff_t *ppos) | |
69b1214c | 893 | { |
e0ac7da0 | 894 | struct IR *ir = filep->private_data; |
5bd6b046 | 895 | struct IR_rx *rx; |
bcbd1655 | 896 | struct lirc_buffer *rbuf = ir->l.rbuf; |
cc664ae0 | 897 | int ret = 0, written = 0, retries = 0; |
8152b760 | 898 | unsigned int m; |
69b1214c JW |
899 | DECLARE_WAITQUEUE(wait, current); |
900 | ||
be4aa815 | 901 | dev_dbg(ir->l.dev, "read called\n"); |
bcbd1655 | 902 | if (n % rbuf->chunk_size) { |
be4aa815 | 903 | dev_dbg(ir->l.dev, "read result = -EINVAL\n"); |
69b1214c JW |
904 | return -EINVAL; |
905 | } | |
906 | ||
5bd6b046 AW |
907 | rx = get_ir_rx(ir); |
908 | if (rx == NULL) | |
909 | return -ENXIO; | |
910 | ||
69b1214c JW |
911 | /* |
912 | * we add ourselves to the task queue before buffer check | |
913 | * to avoid losing scan code (in case when queue is awaken somewhere | |
914 | * between while condition checking and scheduling) | |
915 | */ | |
bcbd1655 | 916 | add_wait_queue(&rbuf->wait_poll, &wait); |
69b1214c JW |
917 | set_current_state(TASK_INTERRUPTIBLE); |
918 | ||
919 | /* | |
920 | * while we didn't provide 'length' bytes, device is opened in blocking | |
921 | * mode and 'copy_to_user' is happy, wait for data. | |
922 | */ | |
923 | while (written < n && ret == 0) { | |
bcbd1655 | 924 | if (lirc_buffer_empty(rbuf)) { |
69b1214c JW |
925 | /* |
926 | * According to the read(2) man page, 'written' can be | |
927 | * returned as less than 'n', instead of blocking | |
928 | * again, returning -EWOULDBLOCK, or returning | |
929 | * -ERESTARTSYS | |
930 | */ | |
931 | if (written) | |
932 | break; | |
933 | if (filep->f_flags & O_NONBLOCK) { | |
934 | ret = -EWOULDBLOCK; | |
935 | break; | |
936 | } | |
937 | if (signal_pending(current)) { | |
938 | ret = -ERESTARTSYS; | |
939 | break; | |
940 | } | |
941 | schedule(); | |
942 | set_current_state(TASK_INTERRUPTIBLE); | |
943 | } else { | |
ac5b4b6b MCC |
944 | unsigned char buf[MAX_XFER_SIZE]; |
945 | ||
946 | if (rbuf->chunk_size > sizeof(buf)) { | |
2ecd4240 LB |
947 | dev_err(ir->l.dev, |
948 | "chunk_size is too big (%d)!\n", | |
949 | rbuf->chunk_size); | |
ac5b4b6b MCC |
950 | ret = -EINVAL; |
951 | break; | |
952 | } | |
bcbd1655 AW |
953 | m = lirc_buffer_read(rbuf, buf); |
954 | if (m == rbuf->chunk_size) { | |
12a72083 | 955 | ret = copy_to_user(outbuf + written, buf, |
bcbd1655 AW |
956 | rbuf->chunk_size); |
957 | written += rbuf->chunk_size; | |
cc664ae0 JW |
958 | } else { |
959 | retries++; | |
960 | } | |
961 | if (retries >= 5) { | |
be4aa815 | 962 | dev_err(ir->l.dev, "Buffer read failed!\n"); |
cc664ae0 | 963 | ret = -EIO; |
8152b760 | 964 | } |
69b1214c JW |
965 | } |
966 | } | |
967 | ||
bcbd1655 | 968 | remove_wait_queue(&rbuf->wait_poll, &wait); |
5bd6b046 | 969 | put_ir_rx(rx, false); |
69b1214c | 970 | set_current_state(TASK_RUNNING); |
69b1214c | 971 | |
2ecd4240 LB |
972 | dev_dbg(ir->l.dev, "read result = %d (%s)\n", ret, |
973 | ret ? "Error" : "OK"); | |
69b1214c JW |
974 | |
975 | return ret ? ret : written; | |
976 | } | |
977 | ||
978 | /* send a keypress to the IR TX device */ | |
06da95a3 | 979 | static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key) |
69b1214c JW |
980 | { |
981 | unsigned char data_block[TX_BLOCK_SIZE]; | |
982 | unsigned char buf[2]; | |
983 | int i, ret; | |
984 | ||
985 | /* Get data for the codeset/key */ | |
986 | ret = get_key_data(data_block, code, key); | |
987 | ||
988 | if (ret == -EPROTO) { | |
221ca912 LB |
989 | dev_err(tx->ir->l.dev, |
990 | "failed to get data for code %u, key %u -- check lircd.conf entries\n", | |
991 | code, key); | |
69b1214c JW |
992 | return ret; |
993 | } else if (ret != 0) | |
994 | return ret; | |
995 | ||
996 | /* Send the data block */ | |
06da95a3 | 997 | ret = send_data_block(tx, data_block); |
69b1214c JW |
998 | if (ret != 0) |
999 | return ret; | |
1000 | ||
1001 | /* Send data block length? */ | |
1002 | buf[0] = 0x00; | |
1003 | buf[1] = 0x40; | |
e9b351f6 | 1004 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 1005 | if (ret != 2) { |
be4aa815 | 1006 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1007 | return ret < 0 ? ret : -EFAULT; |
1008 | } | |
5766d204 JW |
1009 | |
1010 | /* Give the z8 a moment to process data block */ | |
1011 | for (i = 0; i < 10; i++) { | |
1012 | ret = i2c_master_send(tx->c, buf, 1); | |
1013 | if (ret == 1) | |
1014 | break; | |
1015 | udelay(100); | |
1016 | } | |
1017 | ||
69b1214c | 1018 | if (ret != 1) { |
be4aa815 | 1019 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1020 | return ret < 0 ? ret : -EFAULT; |
1021 | } | |
1022 | ||
1023 | /* Send finished download? */ | |
e9b351f6 | 1024 | ret = i2c_master_recv(tx->c, buf, 1); |
69b1214c | 1025 | if (ret != 1) { |
be4aa815 | 1026 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
1027 | return ret < 0 ? ret : -EFAULT; |
1028 | } | |
1029 | if (buf[0] != 0xA0) { | |
be4aa815 | 1030 | dev_err(tx->ir->l.dev, "unexpected IR TX response #1: %02x\n", |
69b1214c JW |
1031 | buf[0]); |
1032 | return -EFAULT; | |
1033 | } | |
1034 | ||
1035 | /* Send prepare command? */ | |
1036 | buf[0] = 0x00; | |
1037 | buf[1] = 0x80; | |
e9b351f6 | 1038 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 1039 | if (ret != 2) { |
be4aa815 | 1040 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1041 | return ret < 0 ? ret : -EFAULT; |
1042 | } | |
1043 | ||
69b1214c JW |
1044 | /* |
1045 | * The sleep bits aren't necessary on the HD PVR, and in fact, the | |
1046 | * last i2c_master_recv always fails with a -5, so for now, we're | |
1047 | * going to skip this whole mess and say we're done on the HD PVR | |
1048 | */ | |
06da95a3 | 1049 | if (!tx->post_tx_ready_poll) { |
be4aa815 | 1050 | dev_dbg(tx->ir->l.dev, "sent code %u, key %u\n", code, key); |
d7c72356 AW |
1051 | return 0; |
1052 | } | |
69b1214c JW |
1053 | |
1054 | /* | |
1055 | * This bit NAKs until the device is ready, so we retry it | |
1056 | * sleeping a bit each time. This seems to be what the windows | |
1057 | * driver does, approximately. | |
1058 | * Try for up to 1s. | |
1059 | */ | |
1060 | for (i = 0; i < 20; ++i) { | |
1061 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1062 | schedule_timeout((50 * HZ + 999) / 1000); | |
e9b351f6 | 1063 | ret = i2c_master_send(tx->c, buf, 1); |
69b1214c JW |
1064 | if (ret == 1) |
1065 | break; | |
221ca912 LB |
1066 | dev_dbg(tx->ir->l.dev, |
1067 | "NAK expected: i2c_master_send failed with %d (try %d)\n", | |
1068 | ret, i+1); | |
69b1214c JW |
1069 | } |
1070 | if (ret != 1) { | |
221ca912 LB |
1071 | dev_err(tx->ir->l.dev, |
1072 | "IR TX chip never got ready: last i2c_master_send failed with %d\n", | |
1073 | ret); | |
69b1214c JW |
1074 | return ret < 0 ? ret : -EFAULT; |
1075 | } | |
1076 | ||
1077 | /* Seems to be an 'ok' response */ | |
e9b351f6 | 1078 | i = i2c_master_recv(tx->c, buf, 1); |
69b1214c | 1079 | if (i != 1) { |
be4aa815 | 1080 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
1081 | return -EFAULT; |
1082 | } | |
1083 | if (buf[0] != 0x80) { | |
be4aa815 | 1084 | dev_err(tx->ir->l.dev, "unexpected IR TX response #2: %02x\n", |
2ecd4240 | 1085 | buf[0]); |
69b1214c JW |
1086 | return -EFAULT; |
1087 | } | |
1088 | ||
69b1214c | 1089 | /* Oh good, it worked */ |
be4aa815 | 1090 | dev_dbg(tx->ir->l.dev, "sent code %u, key %u\n", code, key); |
69b1214c JW |
1091 | return 0; |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Write a code to the device. We take in a 32-bit number (an int) and then | |
1096 | * decode this to a codeset/key index. The key data is then decompressed and | |
1097 | * sent to the device. We have a spin lock as per i2c documentation to prevent | |
1098 | * multiple concurrent sends which would probably cause the device to explode. | |
1099 | */ | |
12a72083 TT |
1100 | static ssize_t write(struct file *filep, const char __user *buf, size_t n, |
1101 | loff_t *ppos) | |
69b1214c | 1102 | { |
e0ac7da0 | 1103 | struct IR *ir = filep->private_data; |
5bd6b046 | 1104 | struct IR_tx *tx; |
69b1214c JW |
1105 | size_t i; |
1106 | int failures = 0; | |
1107 | ||
69b1214c JW |
1108 | /* Validate user parameters */ |
1109 | if (n % sizeof(int)) | |
1110 | return -EINVAL; | |
1111 | ||
5bd6b046 AW |
1112 | /* Get a struct IR_tx reference */ |
1113 | tx = get_ir_tx(ir); | |
1114 | if (tx == NULL) | |
1115 | return -ENXIO; | |
1116 | ||
d6dbd939 AW |
1117 | /* Ensure our tx->c i2c_client remains valid for the duration */ |
1118 | mutex_lock(&tx->client_lock); | |
1119 | if (tx->c == NULL) { | |
1120 | mutex_unlock(&tx->client_lock); | |
1121 | put_ir_tx(tx, false); | |
1122 | return -ENXIO; | |
1123 | } | |
1124 | ||
69b1214c JW |
1125 | /* Lock i2c bus for the duration */ |
1126 | mutex_lock(&ir->ir_lock); | |
1127 | ||
1128 | /* Send each keypress */ | |
1129 | for (i = 0; i < n;) { | |
1130 | int ret = 0; | |
1131 | int command; | |
1132 | ||
1133 | if (copy_from_user(&command, buf + i, sizeof(command))) { | |
1134 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1135 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1136 | put_ir_tx(tx, false); |
69b1214c JW |
1137 | return -EFAULT; |
1138 | } | |
1139 | ||
1140 | /* Send boot data first if required */ | |
06da95a3 | 1141 | if (tx->need_boot == 1) { |
5bd6b046 AW |
1142 | /* Make sure we have the 'firmware' loaded, first */ |
1143 | ret = fw_load(tx); | |
1144 | if (ret != 0) { | |
1145 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1146 | mutex_unlock(&tx->client_lock); |
5bd6b046 AW |
1147 | put_ir_tx(tx, false); |
1148 | if (ret != -ENOMEM) | |
1149 | ret = -EIO; | |
1150 | return ret; | |
1151 | } | |
1152 | /* Prep the chip for transmitting codes */ | |
06da95a3 | 1153 | ret = send_boot_data(tx); |
69b1214c | 1154 | if (ret == 0) |
06da95a3 | 1155 | tx->need_boot = 0; |
69b1214c JW |
1156 | } |
1157 | ||
1158 | /* Send the code */ | |
1159 | if (ret == 0) { | |
06da95a3 | 1160 | ret = send_code(tx, (unsigned)command >> 16, |
69b1214c JW |
1161 | (unsigned)command & 0xFFFF); |
1162 | if (ret == -EPROTO) { | |
1163 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1164 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1165 | put_ir_tx(tx, false); |
69b1214c JW |
1166 | return ret; |
1167 | } | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Hmm, a failure. If we've had a few then give up, otherwise | |
1172 | * try a reset | |
1173 | */ | |
1174 | if (ret != 0) { | |
1175 | /* Looks like the chip crashed, reset it */ | |
221ca912 LB |
1176 | dev_err(tx->ir->l.dev, |
1177 | "sending to the IR transmitter chip failed, trying reset\n"); | |
69b1214c JW |
1178 | |
1179 | if (failures >= 3) { | |
221ca912 LB |
1180 | dev_err(tx->ir->l.dev, |
1181 | "unable to send to the IR chip after 3 resets, giving up\n"); | |
69b1214c | 1182 | mutex_unlock(&ir->ir_lock); |
d6dbd939 | 1183 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1184 | put_ir_tx(tx, false); |
69b1214c JW |
1185 | return ret; |
1186 | } | |
1187 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1188 | schedule_timeout((100 * HZ + 999) / 1000); | |
06da95a3 | 1189 | tx->need_boot = 1; |
69b1214c JW |
1190 | ++failures; |
1191 | } else | |
1192 | i += sizeof(int); | |
1193 | } | |
1194 | ||
1195 | /* Release i2c bus */ | |
1196 | mutex_unlock(&ir->ir_lock); | |
1197 | ||
d6dbd939 AW |
1198 | mutex_unlock(&tx->client_lock); |
1199 | ||
5bd6b046 AW |
1200 | /* Give back our struct IR_tx reference */ |
1201 | put_ir_tx(tx, false); | |
1202 | ||
69b1214c JW |
1203 | /* All looks good */ |
1204 | return n; | |
1205 | } | |
1206 | ||
1207 | /* copied from lirc_dev */ | |
1208 | static unsigned int poll(struct file *filep, poll_table *wait) | |
1209 | { | |
e0ac7da0 | 1210 | struct IR *ir = filep->private_data; |
5bd6b046 | 1211 | struct IR_rx *rx; |
bcbd1655 | 1212 | struct lirc_buffer *rbuf = ir->l.rbuf; |
69b1214c JW |
1213 | unsigned int ret; |
1214 | ||
be4aa815 | 1215 | dev_dbg(ir->l.dev, "poll called\n"); |
69b1214c | 1216 | |
5bd6b046 | 1217 | rx = get_ir_rx(ir); |
915e5473 AW |
1218 | if (rx == NULL) { |
1219 | /* | |
1220 | * Revisit this, if our poll function ever reports writeable | |
1221 | * status for Tx | |
1222 | */ | |
be4aa815 | 1223 | dev_dbg(ir->l.dev, "poll result = POLLERR\n"); |
915e5473 AW |
1224 | return POLLERR; |
1225 | } | |
69b1214c | 1226 | |
915e5473 AW |
1227 | /* |
1228 | * Add our lirc_buffer's wait_queue to the poll_table. A wake up on | |
1229 | * that buffer's wait queue indicates we may have a new poll status. | |
1230 | */ | |
bcbd1655 | 1231 | poll_wait(filep, &rbuf->wait_poll, wait); |
69b1214c | 1232 | |
915e5473 | 1233 | /* Indicate what ops could happen immediately without blocking */ |
bcbd1655 | 1234 | ret = lirc_buffer_empty(rbuf) ? 0 : (POLLIN|POLLRDNORM); |
69b1214c | 1235 | |
be4aa815 | 1236 | dev_dbg(ir->l.dev, "poll result = %s\n", |
2ecd4240 | 1237 | ret ? "POLLIN|POLLRDNORM" : "none"); |
69b1214c JW |
1238 | return ret; |
1239 | } | |
1240 | ||
1241 | static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) | |
1242 | { | |
e0ac7da0 | 1243 | struct IR *ir = filep->private_data; |
12a72083 | 1244 | unsigned long __user *uptr = (unsigned long __user *)arg; |
69b1214c | 1245 | int result; |
5bd6b046 | 1246 | unsigned long mode, features; |
69b1214c | 1247 | |
5bd6b046 | 1248 | features = ir->l.features; |
69b1214c JW |
1249 | |
1250 | switch (cmd) { | |
1251 | case LIRC_GET_LENGTH: | |
12a72083 | 1252 | result = put_user(13UL, uptr); |
69b1214c JW |
1253 | break; |
1254 | case LIRC_GET_FEATURES: | |
12a72083 | 1255 | result = put_user(features, uptr); |
69b1214c JW |
1256 | break; |
1257 | case LIRC_GET_REC_MODE: | |
1258 | if (!(features&LIRC_CAN_REC_MASK)) | |
1259 | return -ENOSYS; | |
1260 | ||
1261 | result = put_user(LIRC_REC2MODE | |
1262 | (features&LIRC_CAN_REC_MASK), | |
12a72083 | 1263 | uptr); |
69b1214c JW |
1264 | break; |
1265 | case LIRC_SET_REC_MODE: | |
1266 | if (!(features&LIRC_CAN_REC_MASK)) | |
1267 | return -ENOSYS; | |
1268 | ||
12a72083 | 1269 | result = get_user(mode, uptr); |
69b1214c JW |
1270 | if (!result && !(LIRC_MODE2REC(mode) & features)) |
1271 | result = -EINVAL; | |
1272 | break; | |
1273 | case LIRC_GET_SEND_MODE: | |
12d896e1 AW |
1274 | if (!(features&LIRC_CAN_SEND_MASK)) |
1275 | return -ENOSYS; | |
1276 | ||
12a72083 | 1277 | result = put_user(LIRC_MODE_PULSE, uptr); |
69b1214c JW |
1278 | break; |
1279 | case LIRC_SET_SEND_MODE: | |
12d896e1 AW |
1280 | if (!(features&LIRC_CAN_SEND_MASK)) |
1281 | return -ENOSYS; | |
1282 | ||
12a72083 | 1283 | result = get_user(mode, uptr); |
69b1214c JW |
1284 | if (!result && mode != LIRC_MODE_PULSE) |
1285 | return -EINVAL; | |
1286 | break; | |
1287 | default: | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | return result; | |
1291 | } | |
1292 | ||
5bd6b046 | 1293 | static struct IR *get_ir_device_by_minor(unsigned int minor) |
a68a9b73 | 1294 | { |
5c07134f | 1295 | struct IR *ir; |
5bd6b046 | 1296 | struct IR *ret = NULL; |
5c07134f | 1297 | |
5bd6b046 | 1298 | mutex_lock(&ir_devices_lock); |
a68a9b73 | 1299 | |
5bd6b046 AW |
1300 | if (!list_empty(&ir_devices_list)) { |
1301 | list_for_each_entry(ir, &ir_devices_list, list) { | |
1302 | if (ir->l.minor == minor) { | |
1303 | ret = get_ir_device(ir, true); | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | } | |
5c07134f | 1308 | |
5bd6b046 AW |
1309 | mutex_unlock(&ir_devices_lock); |
1310 | return ret; | |
a68a9b73 AW |
1311 | } |
1312 | ||
69b1214c JW |
1313 | /* |
1314 | * Open the IR device. Get hold of our IR structure and | |
1315 | * stash it in private_data for the file | |
1316 | */ | |
1317 | static int open(struct inode *node, struct file *filep) | |
1318 | { | |
1319 | struct IR *ir; | |
a68a9b73 | 1320 | unsigned int minor = MINOR(node->i_rdev); |
69b1214c JW |
1321 | |
1322 | /* find our IR struct */ | |
5bd6b046 | 1323 | ir = get_ir_device_by_minor(minor); |
a68a9b73 AW |
1324 | |
1325 | if (ir == NULL) | |
69b1214c | 1326 | return -ENODEV; |
69b1214c | 1327 | |
a3064855 | 1328 | atomic_inc(&ir->open_count); |
69b1214c JW |
1329 | |
1330 | /* stash our IR struct */ | |
1331 | filep->private_data = ir; | |
1332 | ||
9a55a2b3 | 1333 | nonseekable_open(node, filep); |
69b1214c JW |
1334 | return 0; |
1335 | } | |
1336 | ||
1337 | /* Close the IR device */ | |
1338 | static int close(struct inode *node, struct file *filep) | |
1339 | { | |
1340 | /* find our IR struct */ | |
e0ac7da0 | 1341 | struct IR *ir = filep->private_data; |
fd8392f3 | 1342 | |
69b1214c | 1343 | if (ir == NULL) { |
14f63eee | 1344 | pr_err("ir: close: no private_data attached to the file!\n"); |
69b1214c JW |
1345 | return -ENODEV; |
1346 | } | |
1347 | ||
a3064855 | 1348 | atomic_dec(&ir->open_count); |
69b1214c | 1349 | |
5bd6b046 | 1350 | put_ir_device(ir, false); |
69b1214c JW |
1351 | return 0; |
1352 | } | |
1353 | ||
69b1214c JW |
1354 | static int ir_remove(struct i2c_client *client); |
1355 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id); | |
69b1214c | 1356 | |
d7c72356 AW |
1357 | #define ID_FLAG_TX 0x01 |
1358 | #define ID_FLAG_HDPVR 0x02 | |
1359 | ||
69b1214c | 1360 | static const struct i2c_device_id ir_transceiver_id[] = { |
d7c72356 AW |
1361 | { "ir_tx_z8f0811_haup", ID_FLAG_TX }, |
1362 | { "ir_rx_z8f0811_haup", 0 }, | |
1363 | { "ir_tx_z8f0811_hdpvr", ID_FLAG_HDPVR | ID_FLAG_TX }, | |
1364 | { "ir_rx_z8f0811_hdpvr", ID_FLAG_HDPVR }, | |
69b1214c JW |
1365 | { } |
1366 | }; | |
1367 | ||
1368 | static struct i2c_driver driver = { | |
1369 | .driver = { | |
1370 | .owner = THIS_MODULE, | |
1371 | .name = "Zilog/Hauppauge i2c IR", | |
1372 | }, | |
1373 | .probe = ir_probe, | |
1374 | .remove = ir_remove, | |
69b1214c JW |
1375 | .id_table = ir_transceiver_id, |
1376 | }; | |
1377 | ||
0f9313ad | 1378 | static const struct file_operations lirc_fops = { |
69b1214c | 1379 | .owner = THIS_MODULE, |
9a55a2b3 | 1380 | .llseek = no_llseek, |
69b1214c JW |
1381 | .read = read, |
1382 | .write = write, | |
1383 | .poll = poll, | |
1384 | .unlocked_ioctl = ioctl, | |
8be292cc JW |
1385 | #ifdef CONFIG_COMPAT |
1386 | .compat_ioctl = ioctl, | |
1387 | #endif | |
69b1214c JW |
1388 | .open = open, |
1389 | .release = close | |
1390 | }; | |
1391 | ||
534c1eab AW |
1392 | static struct lirc_driver lirc_template = { |
1393 | .name = "lirc_zilog", | |
1394 | .minor = -1, | |
1395 | .code_length = 13, | |
1396 | .buffer_size = BUFLEN / 2, | |
1397 | .sample_rate = 0, /* tell lirc_dev to not start its own kthread */ | |
1398 | .chunk_size = 2, | |
1399 | .set_use_inc = set_use_inc, | |
1400 | .set_use_dec = set_use_dec, | |
1401 | .fops = &lirc_fops, | |
1402 | .owner = THIS_MODULE, | |
1403 | }; | |
1404 | ||
a68a9b73 AW |
1405 | static int ir_remove(struct i2c_client *client) |
1406 | { | |
5bd6b046 AW |
1407 | if (strncmp("ir_tx_z8", client->name, 8) == 0) { |
1408 | struct IR_tx *tx = i2c_get_clientdata(client); | |
fd8392f3 | 1409 | |
d6dbd939 AW |
1410 | if (tx != NULL) { |
1411 | mutex_lock(&tx->client_lock); | |
1412 | tx->c = NULL; | |
1413 | mutex_unlock(&tx->client_lock); | |
5bd6b046 | 1414 | put_ir_tx(tx, false); |
d6dbd939 | 1415 | } |
5bd6b046 AW |
1416 | } else if (strncmp("ir_rx_z8", client->name, 8) == 0) { |
1417 | struct IR_rx *rx = i2c_get_clientdata(client); | |
fd8392f3 | 1418 | |
d6dbd939 AW |
1419 | if (rx != NULL) { |
1420 | mutex_lock(&rx->client_lock); | |
1421 | rx->c = NULL; | |
1422 | mutex_unlock(&rx->client_lock); | |
5bd6b046 | 1423 | put_ir_rx(rx, false); |
d6dbd939 | 1424 | } |
69b1214c | 1425 | } |
69b1214c JW |
1426 | return 0; |
1427 | } | |
1428 | ||
a68a9b73 AW |
1429 | |
1430 | /* ir_devices_lock must be held */ | |
5bd6b046 | 1431 | static struct IR *get_ir_device_by_adapter(struct i2c_adapter *adapter) |
69b1214c | 1432 | { |
5c07134f | 1433 | struct IR *ir; |
a68a9b73 | 1434 | |
5c07134f AW |
1435 | if (list_empty(&ir_devices_list)) |
1436 | return NULL; | |
1437 | ||
1438 | list_for_each_entry(ir, &ir_devices_list, list) | |
5bd6b046 AW |
1439 | if (ir->adapter == adapter) { |
1440 | get_ir_device(ir, true); | |
5c07134f | 1441 | return ir; |
5bd6b046 | 1442 | } |
a68a9b73 | 1443 | |
5c07134f | 1444 | return NULL; |
a68a9b73 AW |
1445 | } |
1446 | ||
1447 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
1448 | { | |
1449 | struct IR *ir; | |
5bd6b046 AW |
1450 | struct IR_tx *tx; |
1451 | struct IR_rx *rx; | |
69b1214c | 1452 | struct i2c_adapter *adap = client->adapter; |
69b1214c | 1453 | int ret; |
a68a9b73 | 1454 | bool tx_probe = false; |
69b1214c | 1455 | |
f80bdc28 | 1456 | dev_dbg(&client->dev, "%s: %s on i2c-%d (%s), client addr=0x%02x\n", |
86e52428 | 1457 | __func__, id->name, adap->nr, adap->name, client->addr); |
69b1214c | 1458 | |
d7c72356 | 1459 | /* |
a68a9b73 AW |
1460 | * The IR receiver is at i2c address 0x71. |
1461 | * The IR transmitter is at i2c address 0x70. | |
69b1214c | 1462 | */ |
69b1214c | 1463 | |
a68a9b73 AW |
1464 | if (id->driver_data & ID_FLAG_TX) |
1465 | tx_probe = true; | |
1466 | else if (tx_only) /* module option */ | |
e9b351f6 | 1467 | return -ENXIO; |
69b1214c | 1468 | |
be4aa815 | 1469 | pr_info("probing IR %s on %s (i2c-%d)\n", |
b757730b | 1470 | tx_probe ? "Tx" : "Rx", adap->name, adap->nr); |
69b1214c | 1471 | |
a68a9b73 | 1472 | mutex_lock(&ir_devices_lock); |
69b1214c | 1473 | |
a68a9b73 | 1474 | /* Use a single struct IR instance for both the Rx and Tx functions */ |
5bd6b046 | 1475 | ir = get_ir_device_by_adapter(adap); |
a68a9b73 AW |
1476 | if (ir == NULL) { |
1477 | ir = kzalloc(sizeof(struct IR), GFP_KERNEL); | |
1478 | if (ir == NULL) { | |
1479 | ret = -ENOMEM; | |
1480 | goto out_no_ir; | |
06da95a3 | 1481 | } |
5bd6b046 AW |
1482 | kref_init(&ir->ref); |
1483 | ||
a68a9b73 | 1484 | /* store for use in ir_probe() again, and open() later on */ |
5c07134f | 1485 | INIT_LIST_HEAD(&ir->list); |
5bd6b046 | 1486 | list_add_tail(&ir->list, &ir_devices_list); |
a68a9b73 AW |
1487 | |
1488 | ir->adapter = adap; | |
1489 | mutex_init(&ir->ir_lock); | |
a3064855 | 1490 | atomic_set(&ir->open_count, 0); |
5bd6b046 AW |
1491 | spin_lock_init(&ir->tx_ref_lock); |
1492 | spin_lock_init(&ir->rx_ref_lock); | |
a68a9b73 AW |
1493 | |
1494 | /* set lirc_dev stuff */ | |
1495 | memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); | |
5bd6b046 AW |
1496 | /* |
1497 | * FIXME this is a pointer reference to us, but no refcount. | |
1498 | * | |
1499 | * This OK for now, since lirc_dev currently won't touch this | |
1500 | * buffer as we provide our own lirc_fops. | |
1501 | * | |
1502 | * Currently our own lirc_fops rely on this ir->l.rbuf pointer | |
1503 | */ | |
1504 | ir->l.rbuf = &ir->rbuf; | |
1505 | ir->l.dev = &adap->dev; | |
bcbd1655 AW |
1506 | ret = lirc_buffer_init(ir->l.rbuf, |
1507 | ir->l.chunk_size, ir->l.buffer_size); | |
1508 | if (ret) | |
5bd6b046 | 1509 | goto out_put_ir; |
06da95a3 AW |
1510 | } |
1511 | ||
a68a9b73 | 1512 | if (tx_probe) { |
5bd6b046 AW |
1513 | /* Get the IR_rx instance for later, if already allocated */ |
1514 | rx = get_ir_rx(ir); | |
1515 | ||
a68a9b73 | 1516 | /* Set up a struct IR_tx instance */ |
5bd6b046 AW |
1517 | tx = kzalloc(sizeof(struct IR_tx), GFP_KERNEL); |
1518 | if (tx == NULL) { | |
a68a9b73 | 1519 | ret = -ENOMEM; |
5bd6b046 | 1520 | goto out_put_xx; |
a68a9b73 | 1521 | } |
5bd6b046 AW |
1522 | kref_init(&tx->ref); |
1523 | ir->tx = tx; | |
06da95a3 | 1524 | |
534c1eab | 1525 | ir->l.features |= LIRC_CAN_SEND_PULSE; |
d6dbd939 | 1526 | mutex_init(&tx->client_lock); |
5bd6b046 AW |
1527 | tx->c = client; |
1528 | tx->need_boot = 1; | |
1529 | tx->post_tx_ready_poll = | |
a68a9b73 | 1530 | (id->driver_data & ID_FLAG_HDPVR) ? false : true; |
5bd6b046 AW |
1531 | |
1532 | /* An ir ref goes to the struct IR_tx instance */ | |
1533 | tx->ir = get_ir_device(ir, true); | |
1534 | ||
1535 | /* A tx ref goes to the i2c_client */ | |
1536 | i2c_set_clientdata(client, get_ir_tx(ir)); | |
1537 | ||
1538 | /* | |
1539 | * Load the 'firmware'. We do this before registering with | |
1540 | * lirc_dev, so the first firmware load attempt does not happen | |
1541 | * after a open() or write() call on the device. | |
1542 | * | |
1543 | * Failure here is not deemed catastrophic, so the receiver will | |
1544 | * still be usable. Firmware load will be retried in write(), | |
1545 | * if it is needed. | |
1546 | */ | |
1547 | fw_load(tx); | |
1548 | ||
1549 | /* Proceed only if the Rx client is also ready or not needed */ | |
1550 | if (rx == NULL && !tx_only) { | |
221ca912 LB |
1551 | dev_info(tx->ir->l.dev, |
1552 | "probe of IR Tx on %s (i2c-%d) done. Waiting on IR Rx.\n", | |
1553 | adap->name, adap->nr); | |
5bd6b046 AW |
1554 | goto out_ok; |
1555 | } | |
a68a9b73 | 1556 | } else { |
5bd6b046 AW |
1557 | /* Get the IR_tx instance for later, if already allocated */ |
1558 | tx = get_ir_tx(ir); | |
1559 | ||
a68a9b73 | 1560 | /* Set up a struct IR_rx instance */ |
5bd6b046 AW |
1561 | rx = kzalloc(sizeof(struct IR_rx), GFP_KERNEL); |
1562 | if (rx == NULL) { | |
06da95a3 | 1563 | ret = -ENOMEM; |
5bd6b046 | 1564 | goto out_put_xx; |
06da95a3 | 1565 | } |
5bd6b046 AW |
1566 | kref_init(&rx->ref); |
1567 | ir->rx = rx; | |
06da95a3 | 1568 | |
534c1eab | 1569 | ir->l.features |= LIRC_CAN_REC_LIRCCODE; |
d6dbd939 | 1570 | mutex_init(&rx->client_lock); |
5bd6b046 AW |
1571 | rx->c = client; |
1572 | rx->hdpvr_data_fmt = | |
a68a9b73 | 1573 | (id->driver_data & ID_FLAG_HDPVR) ? true : false; |
69b1214c | 1574 | |
5bd6b046 AW |
1575 | /* An ir ref goes to the struct IR_rx instance */ |
1576 | rx->ir = get_ir_device(ir, true); | |
69b1214c | 1577 | |
5bd6b046 AW |
1578 | /* An rx ref goes to the i2c_client */ |
1579 | i2c_set_clientdata(client, get_ir_rx(ir)); | |
a68a9b73 | 1580 | |
5bd6b046 AW |
1581 | /* |
1582 | * Start the polling thread. | |
1583 | * It will only perform an empty loop around schedule_timeout() | |
1584 | * until we register with lirc_dev and the first user open() | |
1585 | */ | |
1586 | /* An ir ref goes to the new rx polling kthread */ | |
1587 | rx->task = kthread_run(lirc_thread, get_ir_device(ir, true), | |
1588 | "zilog-rx-i2c-%d", adap->nr); | |
1589 | if (IS_ERR(rx->task)) { | |
1590 | ret = PTR_ERR(rx->task); | |
221ca912 LB |
1591 | dev_err(tx->ir->l.dev, |
1592 | "%s: could not start IR Rx polling thread\n", | |
1593 | __func__); | |
5bd6b046 AW |
1594 | /* Failed kthread, so put back the ir ref */ |
1595 | put_ir_device(ir, true); | |
1596 | /* Failure exit, so put back rx ref from i2c_client */ | |
1597 | i2c_set_clientdata(client, NULL); | |
1598 | put_ir_rx(rx, true); | |
1599 | ir->l.features &= ~LIRC_CAN_REC_LIRCCODE; | |
1600 | goto out_put_xx; | |
1601 | } | |
1602 | ||
1603 | /* Proceed only if the Tx client is also ready */ | |
1604 | if (tx == NULL) { | |
221ca912 LB |
1605 | pr_info("probe of IR Rx on %s (i2c-%d) done. Waiting on IR Tx.\n", |
1606 | adap->name, adap->nr); | |
5bd6b046 | 1607 | goto out_ok; |
69b1214c | 1608 | } |
69b1214c JW |
1609 | } |
1610 | ||
69b1214c | 1611 | /* register with lirc */ |
5bd6b046 | 1612 | ir->l.minor = minor; /* module option: user requested minor number */ |
69b1214c JW |
1613 | ir->l.minor = lirc_register_driver(&ir->l); |
1614 | if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) { | |
2ecd4240 LB |
1615 | dev_err(tx->ir->l.dev, |
1616 | "%s: \"minor\" must be between 0 and %d (%d)!\n", | |
1617 | __func__, MAX_IRCTL_DEVICES-1, ir->l.minor); | |
69b1214c | 1618 | ret = -EBADRQC; |
5bd6b046 | 1619 | goto out_put_xx; |
12d896e1 | 1620 | } |
2ecd4240 LB |
1621 | dev_info(ir->l.dev, |
1622 | "IR unit on %s (i2c-%d) registered as lirc%d and ready\n", | |
1623 | adap->name, adap->nr, ir->l.minor); | |
69b1214c | 1624 | |
5bd6b046 AW |
1625 | out_ok: |
1626 | if (rx != NULL) | |
1627 | put_ir_rx(rx, true); | |
1628 | if (tx != NULL) | |
1629 | put_ir_tx(tx, true); | |
1630 | put_ir_device(ir, true); | |
2ecd4240 LB |
1631 | dev_info(ir->l.dev, |
1632 | "probe of IR %s on %s (i2c-%d) done\n", | |
1633 | tx_probe ? "Tx" : "Rx", adap->name, adap->nr); | |
a68a9b73 | 1634 | mutex_unlock(&ir_devices_lock); |
69b1214c JW |
1635 | return 0; |
1636 | ||
5bd6b046 AW |
1637 | out_put_xx: |
1638 | if (rx != NULL) | |
1639 | put_ir_rx(rx, true); | |
1640 | if (tx != NULL) | |
1641 | put_ir_tx(tx, true); | |
1642 | out_put_ir: | |
1643 | put_ir_device(ir, true); | |
a68a9b73 | 1644 | out_no_ir: |
2ecd4240 LB |
1645 | dev_err(&client->dev, |
1646 | "%s: probing IR %s on %s (i2c-%d) failed with %d\n", | |
1647 | __func__, tx_probe ? "Tx" : "Rx", adap->name, adap->nr, ret); | |
a68a9b73 AW |
1648 | mutex_unlock(&ir_devices_lock); |
1649 | return ret; | |
69b1214c JW |
1650 | } |
1651 | ||
69b1214c JW |
1652 | static int __init zilog_init(void) |
1653 | { | |
1654 | int ret; | |
1655 | ||
be4aa815 | 1656 | pr_notice("Zilog/Hauppauge IR driver initializing\n"); |
69b1214c JW |
1657 | |
1658 | mutex_init(&tx_data_lock); | |
1659 | ||
1660 | request_module("firmware_class"); | |
1661 | ||
1662 | ret = i2c_add_driver(&driver); | |
1663 | if (ret) | |
be4aa815 | 1664 | pr_err("initialization failed\n"); |
69b1214c | 1665 | else |
be4aa815 | 1666 | pr_notice("initialization complete\n"); |
69b1214c JW |
1667 | |
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | static void __exit zilog_exit(void) | |
1672 | { | |
1673 | i2c_del_driver(&driver); | |
1674 | /* if loaded */ | |
1675 | fw_unload(); | |
be4aa815 | 1676 | pr_notice("Zilog/Hauppauge IR driver unloaded\n"); |
69b1214c JW |
1677 | } |
1678 | ||
1679 | module_init(zilog_init); | |
1680 | module_exit(zilog_exit); | |
1681 | ||
1682 | MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)"); | |
1683 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " | |
c2790c71 AW |
1684 | "Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver, " |
1685 | "Andy Walls"); | |
69b1214c JW |
1686 | MODULE_LICENSE("GPL"); |
1687 | /* for compat with old name, which isn't all that accurate anymore */ | |
1688 | MODULE_ALIAS("lirc_pvr150"); | |
1689 | ||
1690 | module_param(minor, int, 0444); | |
1691 | MODULE_PARM_DESC(minor, "Preferred minor device number"); | |
1692 | ||
1693 | module_param(debug, bool, 0644); | |
1694 | MODULE_PARM_DESC(debug, "Enable debugging messages"); | |
1695 | ||
a68a9b73 AW |
1696 | module_param(tx_only, bool, 0644); |
1697 | MODULE_PARM_DESC(tx_only, "Only handle the IR transmit function"); |