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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 AM |
371 | dev_err(ir->l.dev, "i2c_master_send failed with %d\n", |
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]; | |
be4aa815 AM |
415 | dev_dbg(ir->l.dev, "key (0x%02x/0x%02x)\n", |
416 | rx->b[0], rx->b[1]); | |
69b1214c JW |
417 | } |
418 | ||
419 | /* key pressed ? */ | |
06da95a3 | 420 | if (rx->hdpvr_data_fmt) { |
5bd6b046 AW |
421 | if (got_data && (keybuf[0] == 0x80)) { |
422 | ret = 0; | |
423 | break; | |
424 | } else if (got_data && (keybuf[0] == 0x00)) { | |
425 | ret = -ENODATA; | |
426 | break; | |
427 | } | |
428 | } else if ((rx->b[0] & 0x80) == 0) { | |
429 | ret = got_data ? 0 : -ENODATA; | |
430 | break; | |
431 | } | |
69b1214c JW |
432 | |
433 | /* look what we have */ | |
06da95a3 | 434 | code = (((__u16)rx->b[0] & 0x7f) << 6) | (rx->b[1] >> 2); |
69b1214c JW |
435 | |
436 | codes[0] = (code >> 8) & 0xff; | |
437 | codes[1] = code & 0xff; | |
438 | ||
439 | /* return it */ | |
bcbd1655 | 440 | lirc_buffer_write(rbuf, codes); |
69b1214c | 441 | ++got_data; |
5bd6b046 | 442 | ret = 0; |
bcbd1655 | 443 | } while (!lirc_buffer_full(rbuf)); |
69b1214c | 444 | |
d6dbd939 | 445 | mutex_unlock(&rx->client_lock); |
5bd6b046 AW |
446 | if (tx != NULL) |
447 | put_ir_tx(tx, false); | |
448 | put_ir_rx(rx, false); | |
449 | return ret; | |
69b1214c JW |
450 | } |
451 | ||
452 | /* | |
453 | * Main function of the polling thread -- from lirc_dev. | |
454 | * We don't fit the LIRC model at all anymore. This is horrible, but | |
455 | * basically we have a single RX/TX device with a nasty failure mode | |
456 | * that needs to be accounted for across the pair. lirc lets us provide | |
457 | * fops, but prevents us from using the internal polling, etc. if we do | |
458 | * so. Hence the replication. Might be neater to extend the LIRC model | |
459 | * to account for this but I'd think it's a very special case of seriously | |
460 | * messed up hardware. | |
461 | */ | |
462 | static int lirc_thread(void *arg) | |
463 | { | |
464 | struct IR *ir = arg; | |
bcbd1655 | 465 | struct lirc_buffer *rbuf = ir->l.rbuf; |
69b1214c | 466 | |
be4aa815 | 467 | dev_dbg(ir->l.dev, "poll thread started\n"); |
69b1214c | 468 | |
b757730b | 469 | while (!kthread_should_stop()) { |
6a8c97ac JW |
470 | set_current_state(TASK_INTERRUPTIBLE); |
471 | ||
b757730b | 472 | /* if device not opened, we can sleep half a second */ |
a3064855 | 473 | if (atomic_read(&ir->open_count) == 0) { |
69b1214c | 474 | schedule_timeout(HZ/2); |
b757730b | 475 | continue; |
69b1214c | 476 | } |
69b1214c | 477 | |
b757730b AW |
478 | /* |
479 | * This is ~113*2 + 24 + jitter (2*repeat gap + code length). | |
480 | * We use this interval as the chip resets every time you poll | |
481 | * it (bad!). This is therefore just sufficient to catch all | |
482 | * of the button presses. It makes the remote much more | |
483 | * responsive. You can see the difference by running irw and | |
484 | * holding down a button. With 100ms, the old polling | |
485 | * interval, you'll notice breaks in the repeat sequence | |
486 | * corresponding to lost keypresses. | |
487 | */ | |
488 | schedule_timeout((260 * HZ) / 1000); | |
489 | if (kthread_should_stop()) | |
490 | break; | |
491 | if (!add_to_buf(ir)) | |
bcbd1655 | 492 | wake_up_interruptible(&rbuf->wait_poll); |
b757730b | 493 | } |
69b1214c | 494 | |
be4aa815 | 495 | dev_dbg(ir->l.dev, "poll thread ended\n"); |
69b1214c JW |
496 | return 0; |
497 | } | |
498 | ||
499 | static int set_use_inc(void *data) | |
500 | { | |
69b1214c JW |
501 | return 0; |
502 | } | |
503 | ||
504 | static void set_use_dec(void *data) | |
505 | { | |
69b1214c JW |
506 | } |
507 | ||
508 | /* safe read of a uint32 (always network byte order) */ | |
509 | static int read_uint32(unsigned char **data, | |
510 | unsigned char *endp, unsigned int *val) | |
511 | { | |
512 | if (*data + 4 > endp) | |
513 | return 0; | |
514 | *val = ((*data)[0] << 24) | ((*data)[1] << 16) | | |
515 | ((*data)[2] << 8) | (*data)[3]; | |
516 | *data += 4; | |
517 | return 1; | |
518 | } | |
519 | ||
520 | /* safe read of a uint8 */ | |
521 | static int read_uint8(unsigned char **data, | |
522 | unsigned char *endp, unsigned char *val) | |
523 | { | |
524 | if (*data + 1 > endp) | |
525 | return 0; | |
526 | *val = *((*data)++); | |
527 | return 1; | |
528 | } | |
529 | ||
530 | /* safe skipping of N bytes */ | |
531 | static int skip(unsigned char **data, | |
532 | unsigned char *endp, unsigned int distance) | |
533 | { | |
534 | if (*data + distance > endp) | |
535 | return 0; | |
536 | *data += distance; | |
537 | return 1; | |
538 | } | |
539 | ||
540 | /* decompress key data into the given buffer */ | |
541 | static int get_key_data(unsigned char *buf, | |
542 | unsigned int codeset, unsigned int key) | |
543 | { | |
544 | unsigned char *data, *endp, *diffs, *key_block; | |
545 | unsigned char keys, ndiffs, id; | |
546 | unsigned int base, lim, pos, i; | |
547 | ||
548 | /* Binary search for the codeset */ | |
549 | for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) { | |
550 | pos = base + (lim >> 1); | |
551 | data = tx_data->code_sets[pos]; | |
552 | ||
553 | if (!read_uint32(&data, tx_data->endp, &i)) | |
554 | goto corrupt; | |
555 | ||
556 | if (i == codeset) | |
557 | break; | |
558 | else if (codeset > i) { | |
559 | base = pos + 1; | |
560 | --lim; | |
561 | } | |
562 | } | |
563 | /* Not found? */ | |
564 | if (!lim) | |
565 | return -EPROTO; | |
566 | ||
567 | /* Set end of data block */ | |
568 | endp = pos < tx_data->num_code_sets - 1 ? | |
569 | tx_data->code_sets[pos + 1] : tx_data->endp; | |
570 | ||
571 | /* Read the block header */ | |
572 | if (!read_uint8(&data, endp, &keys) || | |
573 | !read_uint8(&data, endp, &ndiffs) || | |
574 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
575 | goto corrupt; | |
576 | ||
577 | /* Save diffs & skip */ | |
578 | diffs = data; | |
579 | if (!skip(&data, endp, ndiffs)) | |
580 | goto corrupt; | |
581 | ||
582 | /* Read the id of the first key */ | |
583 | if (!read_uint8(&data, endp, &id)) | |
584 | goto corrupt; | |
585 | ||
586 | /* Unpack the first key's data */ | |
587 | for (i = 0; i < TX_BLOCK_SIZE; ++i) { | |
588 | if (tx_data->fixed[i] == -1) { | |
589 | if (!read_uint8(&data, endp, &buf[i])) | |
590 | goto corrupt; | |
591 | } else { | |
592 | buf[i] = (unsigned char)tx_data->fixed[i]; | |
593 | } | |
594 | } | |
595 | ||
596 | /* Early out key found/not found */ | |
597 | if (key == id) | |
598 | return 0; | |
599 | if (keys == 1) | |
600 | return -EPROTO; | |
601 | ||
602 | /* Sanity check */ | |
603 | key_block = data; | |
604 | if (!skip(&data, endp, (keys - 1) * (ndiffs + 1))) | |
605 | goto corrupt; | |
606 | ||
607 | /* Binary search for the key */ | |
608 | for (base = 0, lim = keys - 1; lim; lim >>= 1) { | |
609 | /* Seek to block */ | |
610 | unsigned char *key_data; | |
fd8392f3 | 611 | |
69b1214c JW |
612 | pos = base + (lim >> 1); |
613 | key_data = key_block + (ndiffs + 1) * pos; | |
614 | ||
615 | if (*key_data == key) { | |
616 | /* skip key id */ | |
617 | ++key_data; | |
618 | ||
619 | /* found, so unpack the diffs */ | |
620 | for (i = 0; i < ndiffs; ++i) { | |
621 | unsigned char val; | |
fd8392f3 | 622 | |
69b1214c JW |
623 | if (!read_uint8(&key_data, endp, &val) || |
624 | diffs[i] >= TX_BLOCK_SIZE) | |
625 | goto corrupt; | |
626 | buf[diffs[i]] = val; | |
627 | } | |
628 | ||
629 | return 0; | |
630 | } else if (key > *key_data) { | |
631 | base = pos + 1; | |
632 | --lim; | |
633 | } | |
634 | } | |
635 | /* Key not found */ | |
636 | return -EPROTO; | |
637 | ||
638 | corrupt: | |
be4aa815 | 639 | pr_err("firmware is corrupt\n"); |
69b1214c JW |
640 | return -EFAULT; |
641 | } | |
642 | ||
643 | /* send a block of data to the IR TX device */ | |
06da95a3 | 644 | static int send_data_block(struct IR_tx *tx, unsigned char *data_block) |
69b1214c JW |
645 | { |
646 | int i, j, ret; | |
647 | unsigned char buf[5]; | |
648 | ||
649 | for (i = 0; i < TX_BLOCK_SIZE;) { | |
650 | int tosend = TX_BLOCK_SIZE - i; | |
fd8392f3 | 651 | |
69b1214c JW |
652 | if (tosend > 4) |
653 | tosend = 4; | |
654 | buf[0] = (unsigned char)(i + 1); | |
655 | for (j = 0; j < tosend; ++j) | |
656 | buf[1 + j] = data_block[i + j]; | |
be4aa815 | 657 | dev_dbg(tx->ir->l.dev, "%*ph", 5, buf); |
e9b351f6 | 658 | ret = i2c_master_send(tx->c, buf, tosend + 1); |
69b1214c | 659 | if (ret != tosend + 1) { |
be4aa815 AM |
660 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", |
661 | ret); | |
69b1214c JW |
662 | return ret < 0 ? ret : -EFAULT; |
663 | } | |
664 | i += tosend; | |
665 | } | |
666 | return 0; | |
667 | } | |
668 | ||
669 | /* send boot data to the IR TX device */ | |
06da95a3 | 670 | static int send_boot_data(struct IR_tx *tx) |
69b1214c | 671 | { |
5766d204 | 672 | int ret, i; |
69b1214c JW |
673 | unsigned char buf[4]; |
674 | ||
675 | /* send the boot block */ | |
06da95a3 | 676 | ret = send_data_block(tx, tx_data->boot_data); |
69b1214c JW |
677 | if (ret != 0) |
678 | return ret; | |
679 | ||
5766d204 | 680 | /* Hit the go button to activate the new boot data */ |
69b1214c JW |
681 | buf[0] = 0x00; |
682 | buf[1] = 0x20; | |
e9b351f6 | 683 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 684 | if (ret != 2) { |
be4aa815 | 685 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
686 | return ret < 0 ? ret : -EFAULT; |
687 | } | |
5766d204 JW |
688 | |
689 | /* | |
690 | * Wait for zilog to settle after hitting go post boot block upload. | |
691 | * Without this delay, the HD-PVR and HVR-1950 both return an -EIO | |
692 | * upon attempting to get firmware revision, and tx probe thus fails. | |
693 | */ | |
694 | for (i = 0; i < 10; i++) { | |
695 | ret = i2c_master_send(tx->c, buf, 1); | |
696 | if (ret == 1) | |
697 | break; | |
698 | udelay(100); | |
699 | } | |
700 | ||
69b1214c | 701 | if (ret != 1) { |
be4aa815 | 702 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
703 | return ret < 0 ? ret : -EFAULT; |
704 | } | |
705 | ||
706 | /* Here comes the firmware version... (hopefully) */ | |
e9b351f6 | 707 | ret = i2c_master_recv(tx->c, buf, 4); |
69b1214c | 708 | if (ret != 4) { |
be4aa815 | 709 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
710 | return 0; |
711 | } | |
5766d204 | 712 | if ((buf[0] != 0x80) && (buf[0] != 0xa0)) { |
be4aa815 AM |
713 | dev_err(tx->ir->l.dev, "unexpected IR TX init response: %02x\n", |
714 | buf[0]); | |
69b1214c JW |
715 | return 0; |
716 | } | |
221ca912 LB |
717 | dev_notice(tx->ir->l.dev, |
718 | "Zilog/Hauppauge IR blaster firmware version %d.%d.%d loaded\n", | |
719 | buf[1], buf[2], buf[3]); | |
69b1214c JW |
720 | |
721 | return 0; | |
722 | } | |
723 | ||
724 | /* unload "firmware", lock held */ | |
725 | static void fw_unload_locked(void) | |
726 | { | |
727 | if (tx_data) { | |
e8379ecf | 728 | vfree(tx_data->code_sets); |
69b1214c | 729 | |
e8379ecf | 730 | vfree(tx_data->datap); |
69b1214c JW |
731 | |
732 | vfree(tx_data); | |
733 | tx_data = NULL; | |
be4aa815 | 734 | pr_debug("successfully unloaded IR blaster firmware\n"); |
69b1214c JW |
735 | } |
736 | } | |
737 | ||
738 | /* unload "firmware" for the IR TX device */ | |
739 | static void fw_unload(void) | |
740 | { | |
741 | mutex_lock(&tx_data_lock); | |
742 | fw_unload_locked(); | |
743 | mutex_unlock(&tx_data_lock); | |
744 | } | |
745 | ||
746 | /* load "firmware" for the IR TX device */ | |
06da95a3 | 747 | static int fw_load(struct IR_tx *tx) |
69b1214c JW |
748 | { |
749 | int ret; | |
750 | unsigned int i; | |
751 | unsigned char *data, version, num_global_fixed; | |
752 | const struct firmware *fw_entry; | |
753 | ||
754 | /* Already loaded? */ | |
755 | mutex_lock(&tx_data_lock); | |
756 | if (tx_data) { | |
757 | ret = 0; | |
758 | goto out; | |
759 | } | |
760 | ||
761 | /* Request codeset data file */ | |
5bd6b046 | 762 | ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", tx->ir->l.dev); |
69b1214c | 763 | if (ret != 0) { |
be4aa815 | 764 | dev_err(tx->ir->l.dev, "firmware haup-ir-blaster.bin not available (%d)\n", |
70a51d28 | 765 | ret); |
69b1214c JW |
766 | ret = ret < 0 ? ret : -EFAULT; |
767 | goto out; | |
768 | } | |
be4aa815 | 769 | dev_dbg(tx->ir->l.dev, "firmware of size %zu loaded\n", fw_entry->size); |
69b1214c JW |
770 | |
771 | /* Parse the file */ | |
772 | tx_data = vmalloc(sizeof(*tx_data)); | |
773 | if (tx_data == NULL) { | |
69b1214c JW |
774 | release_firmware(fw_entry); |
775 | ret = -ENOMEM; | |
776 | goto out; | |
777 | } | |
778 | tx_data->code_sets = NULL; | |
779 | ||
780 | /* Copy the data so hotplug doesn't get confused and timeout */ | |
781 | tx_data->datap = vmalloc(fw_entry->size); | |
782 | if (tx_data->datap == NULL) { | |
69b1214c JW |
783 | release_firmware(fw_entry); |
784 | vfree(tx_data); | |
785 | ret = -ENOMEM; | |
786 | goto out; | |
787 | } | |
788 | memcpy(tx_data->datap, fw_entry->data, fw_entry->size); | |
789 | tx_data->endp = tx_data->datap + fw_entry->size; | |
790 | release_firmware(fw_entry); fw_entry = NULL; | |
791 | ||
792 | /* Check version */ | |
793 | data = tx_data->datap; | |
794 | if (!read_uint8(&data, tx_data->endp, &version)) | |
795 | goto corrupt; | |
796 | if (version != 1) { | |
221ca912 LB |
797 | dev_err(tx->ir->l.dev, |
798 | "unsupported code set file version (%u, expected 1) -- please upgrade to a newer driver", | |
799 | version); | |
69b1214c JW |
800 | fw_unload_locked(); |
801 | ret = -EFAULT; | |
802 | goto out; | |
803 | } | |
804 | ||
805 | /* Save boot block for later */ | |
806 | tx_data->boot_data = data; | |
807 | if (!skip(&data, tx_data->endp, TX_BLOCK_SIZE)) | |
808 | goto corrupt; | |
809 | ||
810 | if (!read_uint32(&data, tx_data->endp, | |
811 | &tx_data->num_code_sets)) | |
812 | goto corrupt; | |
813 | ||
be4aa815 AM |
814 | dev_dbg(tx->ir->l.dev, "%u IR blaster codesets loaded\n", |
815 | tx_data->num_code_sets); | |
69b1214c JW |
816 | |
817 | tx_data->code_sets = vmalloc( | |
818 | tx_data->num_code_sets * sizeof(char *)); | |
819 | if (tx_data->code_sets == NULL) { | |
820 | fw_unload_locked(); | |
821 | ret = -ENOMEM; | |
822 | goto out; | |
823 | } | |
824 | ||
825 | for (i = 0; i < TX_BLOCK_SIZE; ++i) | |
826 | tx_data->fixed[i] = -1; | |
827 | ||
828 | /* Read global fixed data template */ | |
829 | if (!read_uint8(&data, tx_data->endp, &num_global_fixed) || | |
830 | num_global_fixed > TX_BLOCK_SIZE) | |
831 | goto corrupt; | |
832 | for (i = 0; i < num_global_fixed; ++i) { | |
833 | unsigned char pos, val; | |
fd8392f3 | 834 | |
69b1214c JW |
835 | if (!read_uint8(&data, tx_data->endp, &pos) || |
836 | !read_uint8(&data, tx_data->endp, &val) || | |
837 | pos >= TX_BLOCK_SIZE) | |
838 | goto corrupt; | |
839 | tx_data->fixed[pos] = (int)val; | |
840 | } | |
841 | ||
842 | /* Filch out the position of each code set */ | |
843 | for (i = 0; i < tx_data->num_code_sets; ++i) { | |
844 | unsigned int id; | |
845 | unsigned char keys; | |
846 | unsigned char ndiffs; | |
847 | ||
848 | /* Save the codeset position */ | |
849 | tx_data->code_sets[i] = data; | |
850 | ||
851 | /* Read header */ | |
852 | if (!read_uint32(&data, tx_data->endp, &id) || | |
853 | !read_uint8(&data, tx_data->endp, &keys) || | |
854 | !read_uint8(&data, tx_data->endp, &ndiffs) || | |
855 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
856 | goto corrupt; | |
857 | ||
858 | /* skip diff positions */ | |
859 | if (!skip(&data, tx_data->endp, ndiffs)) | |
860 | goto corrupt; | |
861 | ||
862 | /* | |
863 | * After the diffs we have the first key id + data - | |
864 | * global fixed | |
865 | */ | |
866 | if (!skip(&data, tx_data->endp, | |
867 | 1 + TX_BLOCK_SIZE - num_global_fixed)) | |
868 | goto corrupt; | |
869 | ||
870 | /* Then we have keys-1 blocks of key id+diffs */ | |
871 | if (!skip(&data, tx_data->endp, | |
872 | (ndiffs + 1) * (keys - 1))) | |
873 | goto corrupt; | |
874 | } | |
875 | ret = 0; | |
876 | goto out; | |
877 | ||
878 | corrupt: | |
be4aa815 | 879 | dev_err(tx->ir->l.dev, "firmware is corrupt\n"); |
69b1214c JW |
880 | fw_unload_locked(); |
881 | ret = -EFAULT; | |
882 | ||
883 | out: | |
884 | mutex_unlock(&tx_data_lock); | |
885 | return ret; | |
886 | } | |
887 | ||
69b1214c | 888 | /* copied from lirc_dev */ |
12a72083 TT |
889 | static ssize_t read(struct file *filep, char __user *outbuf, size_t n, |
890 | loff_t *ppos) | |
69b1214c | 891 | { |
e0ac7da0 | 892 | struct IR *ir = filep->private_data; |
5bd6b046 | 893 | struct IR_rx *rx; |
bcbd1655 | 894 | struct lirc_buffer *rbuf = ir->l.rbuf; |
cc664ae0 | 895 | int ret = 0, written = 0, retries = 0; |
8152b760 | 896 | unsigned int m; |
69b1214c JW |
897 | DECLARE_WAITQUEUE(wait, current); |
898 | ||
be4aa815 | 899 | dev_dbg(ir->l.dev, "read called\n"); |
bcbd1655 | 900 | if (n % rbuf->chunk_size) { |
be4aa815 | 901 | dev_dbg(ir->l.dev, "read result = -EINVAL\n"); |
69b1214c JW |
902 | return -EINVAL; |
903 | } | |
904 | ||
5bd6b046 AW |
905 | rx = get_ir_rx(ir); |
906 | if (rx == NULL) | |
907 | return -ENXIO; | |
908 | ||
69b1214c JW |
909 | /* |
910 | * we add ourselves to the task queue before buffer check | |
911 | * to avoid losing scan code (in case when queue is awaken somewhere | |
912 | * between while condition checking and scheduling) | |
913 | */ | |
bcbd1655 | 914 | add_wait_queue(&rbuf->wait_poll, &wait); |
69b1214c JW |
915 | set_current_state(TASK_INTERRUPTIBLE); |
916 | ||
917 | /* | |
918 | * while we didn't provide 'length' bytes, device is opened in blocking | |
919 | * mode and 'copy_to_user' is happy, wait for data. | |
920 | */ | |
921 | while (written < n && ret == 0) { | |
bcbd1655 | 922 | if (lirc_buffer_empty(rbuf)) { |
69b1214c JW |
923 | /* |
924 | * According to the read(2) man page, 'written' can be | |
925 | * returned as less than 'n', instead of blocking | |
926 | * again, returning -EWOULDBLOCK, or returning | |
927 | * -ERESTARTSYS | |
928 | */ | |
929 | if (written) | |
930 | break; | |
931 | if (filep->f_flags & O_NONBLOCK) { | |
932 | ret = -EWOULDBLOCK; | |
933 | break; | |
934 | } | |
935 | if (signal_pending(current)) { | |
936 | ret = -ERESTARTSYS; | |
937 | break; | |
938 | } | |
939 | schedule(); | |
940 | set_current_state(TASK_INTERRUPTIBLE); | |
941 | } else { | |
ac5b4b6b MCC |
942 | unsigned char buf[MAX_XFER_SIZE]; |
943 | ||
944 | if (rbuf->chunk_size > sizeof(buf)) { | |
be4aa815 | 945 | dev_err(ir->l.dev, "chunk_size is too big (%d)!\n", |
ac5b4b6b MCC |
946 | rbuf->chunk_size); |
947 | ret = -EINVAL; | |
948 | break; | |
949 | } | |
bcbd1655 AW |
950 | m = lirc_buffer_read(rbuf, buf); |
951 | if (m == rbuf->chunk_size) { | |
12a72083 | 952 | ret = copy_to_user(outbuf + written, buf, |
bcbd1655 AW |
953 | rbuf->chunk_size); |
954 | written += rbuf->chunk_size; | |
cc664ae0 JW |
955 | } else { |
956 | retries++; | |
957 | } | |
958 | if (retries >= 5) { | |
be4aa815 | 959 | dev_err(ir->l.dev, "Buffer read failed!\n"); |
cc664ae0 | 960 | ret = -EIO; |
8152b760 | 961 | } |
69b1214c JW |
962 | } |
963 | } | |
964 | ||
bcbd1655 | 965 | remove_wait_queue(&rbuf->wait_poll, &wait); |
5bd6b046 | 966 | put_ir_rx(rx, false); |
69b1214c | 967 | set_current_state(TASK_RUNNING); |
69b1214c | 968 | |
be4aa815 AM |
969 | dev_dbg(ir->l.dev, "read result = %d (%s)\n", |
970 | ret, ret ? "Error" : "OK"); | |
69b1214c JW |
971 | |
972 | return ret ? ret : written; | |
973 | } | |
974 | ||
975 | /* send a keypress to the IR TX device */ | |
06da95a3 | 976 | static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key) |
69b1214c JW |
977 | { |
978 | unsigned char data_block[TX_BLOCK_SIZE]; | |
979 | unsigned char buf[2]; | |
980 | int i, ret; | |
981 | ||
982 | /* Get data for the codeset/key */ | |
983 | ret = get_key_data(data_block, code, key); | |
984 | ||
985 | if (ret == -EPROTO) { | |
221ca912 LB |
986 | dev_err(tx->ir->l.dev, |
987 | "failed to get data for code %u, key %u -- check lircd.conf entries\n", | |
988 | code, key); | |
69b1214c JW |
989 | return ret; |
990 | } else if (ret != 0) | |
991 | return ret; | |
992 | ||
993 | /* Send the data block */ | |
06da95a3 | 994 | ret = send_data_block(tx, data_block); |
69b1214c JW |
995 | if (ret != 0) |
996 | return ret; | |
997 | ||
998 | /* Send data block length? */ | |
999 | buf[0] = 0x00; | |
1000 | buf[1] = 0x40; | |
e9b351f6 | 1001 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 1002 | if (ret != 2) { |
be4aa815 | 1003 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1004 | return ret < 0 ? ret : -EFAULT; |
1005 | } | |
5766d204 JW |
1006 | |
1007 | /* Give the z8 a moment to process data block */ | |
1008 | for (i = 0; i < 10; i++) { | |
1009 | ret = i2c_master_send(tx->c, buf, 1); | |
1010 | if (ret == 1) | |
1011 | break; | |
1012 | udelay(100); | |
1013 | } | |
1014 | ||
69b1214c | 1015 | if (ret != 1) { |
be4aa815 | 1016 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1017 | return ret < 0 ? ret : -EFAULT; |
1018 | } | |
1019 | ||
1020 | /* Send finished download? */ | |
e9b351f6 | 1021 | ret = i2c_master_recv(tx->c, buf, 1); |
69b1214c | 1022 | if (ret != 1) { |
be4aa815 | 1023 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
1024 | return ret < 0 ? ret : -EFAULT; |
1025 | } | |
1026 | if (buf[0] != 0xA0) { | |
be4aa815 | 1027 | dev_err(tx->ir->l.dev, "unexpected IR TX response #1: %02x\n", |
69b1214c JW |
1028 | buf[0]); |
1029 | return -EFAULT; | |
1030 | } | |
1031 | ||
1032 | /* Send prepare command? */ | |
1033 | buf[0] = 0x00; | |
1034 | buf[1] = 0x80; | |
e9b351f6 | 1035 | ret = i2c_master_send(tx->c, buf, 2); |
69b1214c | 1036 | if (ret != 2) { |
be4aa815 | 1037 | dev_err(tx->ir->l.dev, "i2c_master_send failed with %d\n", ret); |
69b1214c JW |
1038 | return ret < 0 ? ret : -EFAULT; |
1039 | } | |
1040 | ||
69b1214c JW |
1041 | /* |
1042 | * The sleep bits aren't necessary on the HD PVR, and in fact, the | |
1043 | * last i2c_master_recv always fails with a -5, so for now, we're | |
1044 | * going to skip this whole mess and say we're done on the HD PVR | |
1045 | */ | |
06da95a3 | 1046 | if (!tx->post_tx_ready_poll) { |
be4aa815 | 1047 | dev_dbg(tx->ir->l.dev, "sent code %u, key %u\n", code, key); |
d7c72356 AW |
1048 | return 0; |
1049 | } | |
69b1214c JW |
1050 | |
1051 | /* | |
1052 | * This bit NAKs until the device is ready, so we retry it | |
1053 | * sleeping a bit each time. This seems to be what the windows | |
1054 | * driver does, approximately. | |
1055 | * Try for up to 1s. | |
1056 | */ | |
1057 | for (i = 0; i < 20; ++i) { | |
1058 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1059 | schedule_timeout((50 * HZ + 999) / 1000); | |
e9b351f6 | 1060 | ret = i2c_master_send(tx->c, buf, 1); |
69b1214c JW |
1061 | if (ret == 1) |
1062 | break; | |
221ca912 LB |
1063 | dev_dbg(tx->ir->l.dev, |
1064 | "NAK expected: i2c_master_send failed with %d (try %d)\n", | |
1065 | ret, i+1); | |
69b1214c JW |
1066 | } |
1067 | if (ret != 1) { | |
221ca912 LB |
1068 | dev_err(tx->ir->l.dev, |
1069 | "IR TX chip never got ready: last i2c_master_send failed with %d\n", | |
1070 | ret); | |
69b1214c JW |
1071 | return ret < 0 ? ret : -EFAULT; |
1072 | } | |
1073 | ||
1074 | /* Seems to be an 'ok' response */ | |
e9b351f6 | 1075 | i = i2c_master_recv(tx->c, buf, 1); |
69b1214c | 1076 | if (i != 1) { |
be4aa815 | 1077 | dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret); |
69b1214c JW |
1078 | return -EFAULT; |
1079 | } | |
1080 | if (buf[0] != 0x80) { | |
be4aa815 AM |
1081 | dev_err(tx->ir->l.dev, "unexpected IR TX response #2: %02x\n", |
1082 | buf[0]); | |
69b1214c JW |
1083 | return -EFAULT; |
1084 | } | |
1085 | ||
69b1214c | 1086 | /* Oh good, it worked */ |
be4aa815 | 1087 | dev_dbg(tx->ir->l.dev, "sent code %u, key %u\n", code, key); |
69b1214c JW |
1088 | return 0; |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Write a code to the device. We take in a 32-bit number (an int) and then | |
1093 | * decode this to a codeset/key index. The key data is then decompressed and | |
1094 | * sent to the device. We have a spin lock as per i2c documentation to prevent | |
1095 | * multiple concurrent sends which would probably cause the device to explode. | |
1096 | */ | |
12a72083 TT |
1097 | static ssize_t write(struct file *filep, const char __user *buf, size_t n, |
1098 | loff_t *ppos) | |
69b1214c | 1099 | { |
e0ac7da0 | 1100 | struct IR *ir = filep->private_data; |
5bd6b046 | 1101 | struct IR_tx *tx; |
69b1214c JW |
1102 | size_t i; |
1103 | int failures = 0; | |
1104 | ||
69b1214c JW |
1105 | /* Validate user parameters */ |
1106 | if (n % sizeof(int)) | |
1107 | return -EINVAL; | |
1108 | ||
5bd6b046 AW |
1109 | /* Get a struct IR_tx reference */ |
1110 | tx = get_ir_tx(ir); | |
1111 | if (tx == NULL) | |
1112 | return -ENXIO; | |
1113 | ||
d6dbd939 AW |
1114 | /* Ensure our tx->c i2c_client remains valid for the duration */ |
1115 | mutex_lock(&tx->client_lock); | |
1116 | if (tx->c == NULL) { | |
1117 | mutex_unlock(&tx->client_lock); | |
1118 | put_ir_tx(tx, false); | |
1119 | return -ENXIO; | |
1120 | } | |
1121 | ||
69b1214c JW |
1122 | /* Lock i2c bus for the duration */ |
1123 | mutex_lock(&ir->ir_lock); | |
1124 | ||
1125 | /* Send each keypress */ | |
1126 | for (i = 0; i < n;) { | |
1127 | int ret = 0; | |
1128 | int command; | |
1129 | ||
1130 | if (copy_from_user(&command, buf + i, sizeof(command))) { | |
1131 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1132 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1133 | put_ir_tx(tx, false); |
69b1214c JW |
1134 | return -EFAULT; |
1135 | } | |
1136 | ||
1137 | /* Send boot data first if required */ | |
06da95a3 | 1138 | if (tx->need_boot == 1) { |
5bd6b046 AW |
1139 | /* Make sure we have the 'firmware' loaded, first */ |
1140 | ret = fw_load(tx); | |
1141 | if (ret != 0) { | |
1142 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1143 | mutex_unlock(&tx->client_lock); |
5bd6b046 AW |
1144 | put_ir_tx(tx, false); |
1145 | if (ret != -ENOMEM) | |
1146 | ret = -EIO; | |
1147 | return ret; | |
1148 | } | |
1149 | /* Prep the chip for transmitting codes */ | |
06da95a3 | 1150 | ret = send_boot_data(tx); |
69b1214c | 1151 | if (ret == 0) |
06da95a3 | 1152 | tx->need_boot = 0; |
69b1214c JW |
1153 | } |
1154 | ||
1155 | /* Send the code */ | |
1156 | if (ret == 0) { | |
06da95a3 | 1157 | ret = send_code(tx, (unsigned)command >> 16, |
69b1214c JW |
1158 | (unsigned)command & 0xFFFF); |
1159 | if (ret == -EPROTO) { | |
1160 | mutex_unlock(&ir->ir_lock); | |
d6dbd939 | 1161 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1162 | put_ir_tx(tx, false); |
69b1214c JW |
1163 | return ret; |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Hmm, a failure. If we've had a few then give up, otherwise | |
1169 | * try a reset | |
1170 | */ | |
1171 | if (ret != 0) { | |
1172 | /* Looks like the chip crashed, reset it */ | |
221ca912 LB |
1173 | dev_err(tx->ir->l.dev, |
1174 | "sending to the IR transmitter chip failed, trying reset\n"); | |
69b1214c JW |
1175 | |
1176 | if (failures >= 3) { | |
221ca912 LB |
1177 | dev_err(tx->ir->l.dev, |
1178 | "unable to send to the IR chip after 3 resets, giving up\n"); | |
69b1214c | 1179 | mutex_unlock(&ir->ir_lock); |
d6dbd939 | 1180 | mutex_unlock(&tx->client_lock); |
5bd6b046 | 1181 | put_ir_tx(tx, false); |
69b1214c JW |
1182 | return ret; |
1183 | } | |
1184 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1185 | schedule_timeout((100 * HZ + 999) / 1000); | |
06da95a3 | 1186 | tx->need_boot = 1; |
69b1214c JW |
1187 | ++failures; |
1188 | } else | |
1189 | i += sizeof(int); | |
1190 | } | |
1191 | ||
1192 | /* Release i2c bus */ | |
1193 | mutex_unlock(&ir->ir_lock); | |
1194 | ||
d6dbd939 AW |
1195 | mutex_unlock(&tx->client_lock); |
1196 | ||
5bd6b046 AW |
1197 | /* Give back our struct IR_tx reference */ |
1198 | put_ir_tx(tx, false); | |
1199 | ||
69b1214c JW |
1200 | /* All looks good */ |
1201 | return n; | |
1202 | } | |
1203 | ||
1204 | /* copied from lirc_dev */ | |
1205 | static unsigned int poll(struct file *filep, poll_table *wait) | |
1206 | { | |
e0ac7da0 | 1207 | struct IR *ir = filep->private_data; |
5bd6b046 | 1208 | struct IR_rx *rx; |
bcbd1655 | 1209 | struct lirc_buffer *rbuf = ir->l.rbuf; |
69b1214c JW |
1210 | unsigned int ret; |
1211 | ||
be4aa815 | 1212 | dev_dbg(ir->l.dev, "poll called\n"); |
69b1214c | 1213 | |
5bd6b046 | 1214 | rx = get_ir_rx(ir); |
915e5473 AW |
1215 | if (rx == NULL) { |
1216 | /* | |
1217 | * Revisit this, if our poll function ever reports writeable | |
1218 | * status for Tx | |
1219 | */ | |
be4aa815 | 1220 | dev_dbg(ir->l.dev, "poll result = POLLERR\n"); |
915e5473 AW |
1221 | return POLLERR; |
1222 | } | |
69b1214c | 1223 | |
915e5473 AW |
1224 | /* |
1225 | * Add our lirc_buffer's wait_queue to the poll_table. A wake up on | |
1226 | * that buffer's wait queue indicates we may have a new poll status. | |
1227 | */ | |
bcbd1655 | 1228 | poll_wait(filep, &rbuf->wait_poll, wait); |
69b1214c | 1229 | |
915e5473 | 1230 | /* Indicate what ops could happen immediately without blocking */ |
bcbd1655 | 1231 | ret = lirc_buffer_empty(rbuf) ? 0 : (POLLIN|POLLRDNORM); |
69b1214c | 1232 | |
be4aa815 AM |
1233 | dev_dbg(ir->l.dev, "poll result = %s\n", |
1234 | ret ? "POLLIN|POLLRDNORM" : "none"); | |
69b1214c JW |
1235 | return ret; |
1236 | } | |
1237 | ||
1238 | static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) | |
1239 | { | |
e0ac7da0 | 1240 | struct IR *ir = filep->private_data; |
12a72083 | 1241 | unsigned long __user *uptr = (unsigned long __user *)arg; |
69b1214c | 1242 | int result; |
5bd6b046 | 1243 | unsigned long mode, features; |
69b1214c | 1244 | |
5bd6b046 | 1245 | features = ir->l.features; |
69b1214c JW |
1246 | |
1247 | switch (cmd) { | |
1248 | case LIRC_GET_LENGTH: | |
12a72083 | 1249 | result = put_user(13UL, uptr); |
69b1214c JW |
1250 | break; |
1251 | case LIRC_GET_FEATURES: | |
12a72083 | 1252 | result = put_user(features, uptr); |
69b1214c JW |
1253 | break; |
1254 | case LIRC_GET_REC_MODE: | |
1255 | if (!(features&LIRC_CAN_REC_MASK)) | |
1256 | return -ENOSYS; | |
1257 | ||
1258 | result = put_user(LIRC_REC2MODE | |
1259 | (features&LIRC_CAN_REC_MASK), | |
12a72083 | 1260 | uptr); |
69b1214c JW |
1261 | break; |
1262 | case LIRC_SET_REC_MODE: | |
1263 | if (!(features&LIRC_CAN_REC_MASK)) | |
1264 | return -ENOSYS; | |
1265 | ||
12a72083 | 1266 | result = get_user(mode, uptr); |
69b1214c JW |
1267 | if (!result && !(LIRC_MODE2REC(mode) & features)) |
1268 | result = -EINVAL; | |
1269 | break; | |
1270 | case LIRC_GET_SEND_MODE: | |
12d896e1 AW |
1271 | if (!(features&LIRC_CAN_SEND_MASK)) |
1272 | return -ENOSYS; | |
1273 | ||
12a72083 | 1274 | result = put_user(LIRC_MODE_PULSE, uptr); |
69b1214c JW |
1275 | break; |
1276 | case LIRC_SET_SEND_MODE: | |
12d896e1 AW |
1277 | if (!(features&LIRC_CAN_SEND_MASK)) |
1278 | return -ENOSYS; | |
1279 | ||
12a72083 | 1280 | result = get_user(mode, uptr); |
69b1214c JW |
1281 | if (!result && mode != LIRC_MODE_PULSE) |
1282 | return -EINVAL; | |
1283 | break; | |
1284 | default: | |
1285 | return -EINVAL; | |
1286 | } | |
1287 | return result; | |
1288 | } | |
1289 | ||
5bd6b046 | 1290 | static struct IR *get_ir_device_by_minor(unsigned int minor) |
a68a9b73 | 1291 | { |
5c07134f | 1292 | struct IR *ir; |
5bd6b046 | 1293 | struct IR *ret = NULL; |
5c07134f | 1294 | |
5bd6b046 | 1295 | mutex_lock(&ir_devices_lock); |
a68a9b73 | 1296 | |
5bd6b046 AW |
1297 | if (!list_empty(&ir_devices_list)) { |
1298 | list_for_each_entry(ir, &ir_devices_list, list) { | |
1299 | if (ir->l.minor == minor) { | |
1300 | ret = get_ir_device(ir, true); | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | } | |
5c07134f | 1305 | |
5bd6b046 AW |
1306 | mutex_unlock(&ir_devices_lock); |
1307 | return ret; | |
a68a9b73 AW |
1308 | } |
1309 | ||
69b1214c JW |
1310 | /* |
1311 | * Open the IR device. Get hold of our IR structure and | |
1312 | * stash it in private_data for the file | |
1313 | */ | |
1314 | static int open(struct inode *node, struct file *filep) | |
1315 | { | |
1316 | struct IR *ir; | |
a68a9b73 | 1317 | unsigned int minor = MINOR(node->i_rdev); |
69b1214c JW |
1318 | |
1319 | /* find our IR struct */ | |
5bd6b046 | 1320 | ir = get_ir_device_by_minor(minor); |
a68a9b73 AW |
1321 | |
1322 | if (ir == NULL) | |
69b1214c | 1323 | return -ENODEV; |
69b1214c | 1324 | |
a3064855 | 1325 | atomic_inc(&ir->open_count); |
69b1214c JW |
1326 | |
1327 | /* stash our IR struct */ | |
1328 | filep->private_data = ir; | |
1329 | ||
9a55a2b3 | 1330 | nonseekable_open(node, filep); |
69b1214c JW |
1331 | return 0; |
1332 | } | |
1333 | ||
1334 | /* Close the IR device */ | |
1335 | static int close(struct inode *node, struct file *filep) | |
1336 | { | |
1337 | /* find our IR struct */ | |
e0ac7da0 | 1338 | struct IR *ir = filep->private_data; |
fd8392f3 | 1339 | |
69b1214c | 1340 | if (ir == NULL) { |
be4aa815 | 1341 | dev_err(ir->l.dev, "close: no private_data attached to the file!\n"); |
69b1214c JW |
1342 | return -ENODEV; |
1343 | } | |
1344 | ||
a3064855 | 1345 | atomic_dec(&ir->open_count); |
69b1214c | 1346 | |
5bd6b046 | 1347 | put_ir_device(ir, false); |
69b1214c JW |
1348 | return 0; |
1349 | } | |
1350 | ||
69b1214c JW |
1351 | static int ir_remove(struct i2c_client *client); |
1352 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id); | |
69b1214c | 1353 | |
d7c72356 AW |
1354 | #define ID_FLAG_TX 0x01 |
1355 | #define ID_FLAG_HDPVR 0x02 | |
1356 | ||
69b1214c | 1357 | static const struct i2c_device_id ir_transceiver_id[] = { |
d7c72356 AW |
1358 | { "ir_tx_z8f0811_haup", ID_FLAG_TX }, |
1359 | { "ir_rx_z8f0811_haup", 0 }, | |
1360 | { "ir_tx_z8f0811_hdpvr", ID_FLAG_HDPVR | ID_FLAG_TX }, | |
1361 | { "ir_rx_z8f0811_hdpvr", ID_FLAG_HDPVR }, | |
69b1214c JW |
1362 | { } |
1363 | }; | |
1364 | ||
1365 | static struct i2c_driver driver = { | |
1366 | .driver = { | |
1367 | .owner = THIS_MODULE, | |
1368 | .name = "Zilog/Hauppauge i2c IR", | |
1369 | }, | |
1370 | .probe = ir_probe, | |
1371 | .remove = ir_remove, | |
69b1214c JW |
1372 | .id_table = ir_transceiver_id, |
1373 | }; | |
1374 | ||
0f9313ad | 1375 | static const struct file_operations lirc_fops = { |
69b1214c | 1376 | .owner = THIS_MODULE, |
9a55a2b3 | 1377 | .llseek = no_llseek, |
69b1214c JW |
1378 | .read = read, |
1379 | .write = write, | |
1380 | .poll = poll, | |
1381 | .unlocked_ioctl = ioctl, | |
8be292cc JW |
1382 | #ifdef CONFIG_COMPAT |
1383 | .compat_ioctl = ioctl, | |
1384 | #endif | |
69b1214c JW |
1385 | .open = open, |
1386 | .release = close | |
1387 | }; | |
1388 | ||
534c1eab AW |
1389 | static struct lirc_driver lirc_template = { |
1390 | .name = "lirc_zilog", | |
1391 | .minor = -1, | |
1392 | .code_length = 13, | |
1393 | .buffer_size = BUFLEN / 2, | |
1394 | .sample_rate = 0, /* tell lirc_dev to not start its own kthread */ | |
1395 | .chunk_size = 2, | |
1396 | .set_use_inc = set_use_inc, | |
1397 | .set_use_dec = set_use_dec, | |
1398 | .fops = &lirc_fops, | |
1399 | .owner = THIS_MODULE, | |
1400 | }; | |
1401 | ||
a68a9b73 AW |
1402 | static int ir_remove(struct i2c_client *client) |
1403 | { | |
5bd6b046 AW |
1404 | if (strncmp("ir_tx_z8", client->name, 8) == 0) { |
1405 | struct IR_tx *tx = i2c_get_clientdata(client); | |
fd8392f3 | 1406 | |
d6dbd939 AW |
1407 | if (tx != NULL) { |
1408 | mutex_lock(&tx->client_lock); | |
1409 | tx->c = NULL; | |
1410 | mutex_unlock(&tx->client_lock); | |
5bd6b046 | 1411 | put_ir_tx(tx, false); |
d6dbd939 | 1412 | } |
5bd6b046 AW |
1413 | } else if (strncmp("ir_rx_z8", client->name, 8) == 0) { |
1414 | struct IR_rx *rx = i2c_get_clientdata(client); | |
fd8392f3 | 1415 | |
d6dbd939 AW |
1416 | if (rx != NULL) { |
1417 | mutex_lock(&rx->client_lock); | |
1418 | rx->c = NULL; | |
1419 | mutex_unlock(&rx->client_lock); | |
5bd6b046 | 1420 | put_ir_rx(rx, false); |
d6dbd939 | 1421 | } |
69b1214c | 1422 | } |
69b1214c JW |
1423 | return 0; |
1424 | } | |
1425 | ||
a68a9b73 AW |
1426 | |
1427 | /* ir_devices_lock must be held */ | |
5bd6b046 | 1428 | static struct IR *get_ir_device_by_adapter(struct i2c_adapter *adapter) |
69b1214c | 1429 | { |
5c07134f | 1430 | struct IR *ir; |
a68a9b73 | 1431 | |
5c07134f AW |
1432 | if (list_empty(&ir_devices_list)) |
1433 | return NULL; | |
1434 | ||
1435 | list_for_each_entry(ir, &ir_devices_list, list) | |
5bd6b046 AW |
1436 | if (ir->adapter == adapter) { |
1437 | get_ir_device(ir, true); | |
5c07134f | 1438 | return ir; |
5bd6b046 | 1439 | } |
a68a9b73 | 1440 | |
5c07134f | 1441 | return NULL; |
a68a9b73 AW |
1442 | } |
1443 | ||
1444 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
1445 | { | |
1446 | struct IR *ir; | |
5bd6b046 AW |
1447 | struct IR_tx *tx; |
1448 | struct IR_rx *rx; | |
69b1214c | 1449 | struct i2c_adapter *adap = client->adapter; |
69b1214c | 1450 | int ret; |
a68a9b73 | 1451 | bool tx_probe = false; |
69b1214c | 1452 | |
f80bdc28 | 1453 | dev_dbg(&client->dev, "%s: %s on i2c-%d (%s), client addr=0x%02x\n", |
86e52428 | 1454 | __func__, id->name, adap->nr, adap->name, client->addr); |
69b1214c | 1455 | |
d7c72356 | 1456 | /* |
a68a9b73 AW |
1457 | * The IR receiver is at i2c address 0x71. |
1458 | * The IR transmitter is at i2c address 0x70. | |
69b1214c | 1459 | */ |
69b1214c | 1460 | |
a68a9b73 AW |
1461 | if (id->driver_data & ID_FLAG_TX) |
1462 | tx_probe = true; | |
1463 | else if (tx_only) /* module option */ | |
e9b351f6 | 1464 | return -ENXIO; |
69b1214c | 1465 | |
be4aa815 | 1466 | pr_info("probing IR %s on %s (i2c-%d)\n", |
b757730b | 1467 | tx_probe ? "Tx" : "Rx", adap->name, adap->nr); |
69b1214c | 1468 | |
a68a9b73 | 1469 | mutex_lock(&ir_devices_lock); |
69b1214c | 1470 | |
a68a9b73 | 1471 | /* Use a single struct IR instance for both the Rx and Tx functions */ |
5bd6b046 | 1472 | ir = get_ir_device_by_adapter(adap); |
a68a9b73 AW |
1473 | if (ir == NULL) { |
1474 | ir = kzalloc(sizeof(struct IR), GFP_KERNEL); | |
1475 | if (ir == NULL) { | |
1476 | ret = -ENOMEM; | |
1477 | goto out_no_ir; | |
06da95a3 | 1478 | } |
5bd6b046 AW |
1479 | kref_init(&ir->ref); |
1480 | ||
a68a9b73 | 1481 | /* store for use in ir_probe() again, and open() later on */ |
5c07134f | 1482 | INIT_LIST_HEAD(&ir->list); |
5bd6b046 | 1483 | list_add_tail(&ir->list, &ir_devices_list); |
a68a9b73 AW |
1484 | |
1485 | ir->adapter = adap; | |
1486 | mutex_init(&ir->ir_lock); | |
a3064855 | 1487 | atomic_set(&ir->open_count, 0); |
5bd6b046 AW |
1488 | spin_lock_init(&ir->tx_ref_lock); |
1489 | spin_lock_init(&ir->rx_ref_lock); | |
a68a9b73 AW |
1490 | |
1491 | /* set lirc_dev stuff */ | |
1492 | memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); | |
5bd6b046 AW |
1493 | /* |
1494 | * FIXME this is a pointer reference to us, but no refcount. | |
1495 | * | |
1496 | * This OK for now, since lirc_dev currently won't touch this | |
1497 | * buffer as we provide our own lirc_fops. | |
1498 | * | |
1499 | * Currently our own lirc_fops rely on this ir->l.rbuf pointer | |
1500 | */ | |
1501 | ir->l.rbuf = &ir->rbuf; | |
1502 | ir->l.dev = &adap->dev; | |
bcbd1655 AW |
1503 | ret = lirc_buffer_init(ir->l.rbuf, |
1504 | ir->l.chunk_size, ir->l.buffer_size); | |
1505 | if (ret) | |
5bd6b046 | 1506 | goto out_put_ir; |
06da95a3 AW |
1507 | } |
1508 | ||
a68a9b73 | 1509 | if (tx_probe) { |
5bd6b046 AW |
1510 | /* Get the IR_rx instance for later, if already allocated */ |
1511 | rx = get_ir_rx(ir); | |
1512 | ||
a68a9b73 | 1513 | /* Set up a struct IR_tx instance */ |
5bd6b046 AW |
1514 | tx = kzalloc(sizeof(struct IR_tx), GFP_KERNEL); |
1515 | if (tx == NULL) { | |
a68a9b73 | 1516 | ret = -ENOMEM; |
5bd6b046 | 1517 | goto out_put_xx; |
a68a9b73 | 1518 | } |
5bd6b046 AW |
1519 | kref_init(&tx->ref); |
1520 | ir->tx = tx; | |
06da95a3 | 1521 | |
534c1eab | 1522 | ir->l.features |= LIRC_CAN_SEND_PULSE; |
d6dbd939 | 1523 | mutex_init(&tx->client_lock); |
5bd6b046 AW |
1524 | tx->c = client; |
1525 | tx->need_boot = 1; | |
1526 | tx->post_tx_ready_poll = | |
a68a9b73 | 1527 | (id->driver_data & ID_FLAG_HDPVR) ? false : true; |
5bd6b046 AW |
1528 | |
1529 | /* An ir ref goes to the struct IR_tx instance */ | |
1530 | tx->ir = get_ir_device(ir, true); | |
1531 | ||
1532 | /* A tx ref goes to the i2c_client */ | |
1533 | i2c_set_clientdata(client, get_ir_tx(ir)); | |
1534 | ||
1535 | /* | |
1536 | * Load the 'firmware'. We do this before registering with | |
1537 | * lirc_dev, so the first firmware load attempt does not happen | |
1538 | * after a open() or write() call on the device. | |
1539 | * | |
1540 | * Failure here is not deemed catastrophic, so the receiver will | |
1541 | * still be usable. Firmware load will be retried in write(), | |
1542 | * if it is needed. | |
1543 | */ | |
1544 | fw_load(tx); | |
1545 | ||
1546 | /* Proceed only if the Rx client is also ready or not needed */ | |
1547 | if (rx == NULL && !tx_only) { | |
221ca912 LB |
1548 | dev_info(tx->ir->l.dev, |
1549 | "probe of IR Tx on %s (i2c-%d) done. Waiting on IR Rx.\n", | |
1550 | adap->name, adap->nr); | |
5bd6b046 AW |
1551 | goto out_ok; |
1552 | } | |
a68a9b73 | 1553 | } else { |
5bd6b046 AW |
1554 | /* Get the IR_tx instance for later, if already allocated */ |
1555 | tx = get_ir_tx(ir); | |
1556 | ||
a68a9b73 | 1557 | /* Set up a struct IR_rx instance */ |
5bd6b046 AW |
1558 | rx = kzalloc(sizeof(struct IR_rx), GFP_KERNEL); |
1559 | if (rx == NULL) { | |
06da95a3 | 1560 | ret = -ENOMEM; |
5bd6b046 | 1561 | goto out_put_xx; |
06da95a3 | 1562 | } |
5bd6b046 AW |
1563 | kref_init(&rx->ref); |
1564 | ir->rx = rx; | |
06da95a3 | 1565 | |
534c1eab | 1566 | ir->l.features |= LIRC_CAN_REC_LIRCCODE; |
d6dbd939 | 1567 | mutex_init(&rx->client_lock); |
5bd6b046 AW |
1568 | rx->c = client; |
1569 | rx->hdpvr_data_fmt = | |
a68a9b73 | 1570 | (id->driver_data & ID_FLAG_HDPVR) ? true : false; |
69b1214c | 1571 | |
5bd6b046 AW |
1572 | /* An ir ref goes to the struct IR_rx instance */ |
1573 | rx->ir = get_ir_device(ir, true); | |
69b1214c | 1574 | |
5bd6b046 AW |
1575 | /* An rx ref goes to the i2c_client */ |
1576 | i2c_set_clientdata(client, get_ir_rx(ir)); | |
a68a9b73 | 1577 | |
5bd6b046 AW |
1578 | /* |
1579 | * Start the polling thread. | |
1580 | * It will only perform an empty loop around schedule_timeout() | |
1581 | * until we register with lirc_dev and the first user open() | |
1582 | */ | |
1583 | /* An ir ref goes to the new rx polling kthread */ | |
1584 | rx->task = kthread_run(lirc_thread, get_ir_device(ir, true), | |
1585 | "zilog-rx-i2c-%d", adap->nr); | |
1586 | if (IS_ERR(rx->task)) { | |
1587 | ret = PTR_ERR(rx->task); | |
221ca912 LB |
1588 | dev_err(tx->ir->l.dev, |
1589 | "%s: could not start IR Rx polling thread\n", | |
1590 | __func__); | |
5bd6b046 AW |
1591 | /* Failed kthread, so put back the ir ref */ |
1592 | put_ir_device(ir, true); | |
1593 | /* Failure exit, so put back rx ref from i2c_client */ | |
1594 | i2c_set_clientdata(client, NULL); | |
1595 | put_ir_rx(rx, true); | |
1596 | ir->l.features &= ~LIRC_CAN_REC_LIRCCODE; | |
1597 | goto out_put_xx; | |
1598 | } | |
1599 | ||
1600 | /* Proceed only if the Tx client is also ready */ | |
1601 | if (tx == NULL) { | |
221ca912 LB |
1602 | pr_info("probe of IR Rx on %s (i2c-%d) done. Waiting on IR Tx.\n", |
1603 | adap->name, adap->nr); | |
5bd6b046 | 1604 | goto out_ok; |
69b1214c | 1605 | } |
69b1214c JW |
1606 | } |
1607 | ||
69b1214c | 1608 | /* register with lirc */ |
5bd6b046 | 1609 | ir->l.minor = minor; /* module option: user requested minor number */ |
69b1214c JW |
1610 | ir->l.minor = lirc_register_driver(&ir->l); |
1611 | if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) { | |
be4aa815 | 1612 | dev_err(tx->ir->l.dev, "%s: \"minor\" must be between 0 and %d (%d)!\n", |
a68a9b73 | 1613 | __func__, MAX_IRCTL_DEVICES-1, ir->l.minor); |
69b1214c | 1614 | ret = -EBADRQC; |
5bd6b046 | 1615 | goto out_put_xx; |
12d896e1 | 1616 | } |
be4aa815 | 1617 | dev_info(ir->l.dev, "IR unit on %s (i2c-%d) registered as lirc%d and ready\n", |
4933fc9d | 1618 | adap->name, adap->nr, ir->l.minor); |
69b1214c | 1619 | |
5bd6b046 AW |
1620 | out_ok: |
1621 | if (rx != NULL) | |
1622 | put_ir_rx(rx, true); | |
1623 | if (tx != NULL) | |
1624 | put_ir_tx(tx, true); | |
1625 | put_ir_device(ir, true); | |
be4aa815 | 1626 | dev_info(ir->l.dev, "probe of IR %s on %s (i2c-%d) done\n", |
b757730b | 1627 | tx_probe ? "Tx" : "Rx", adap->name, adap->nr); |
a68a9b73 | 1628 | mutex_unlock(&ir_devices_lock); |
69b1214c JW |
1629 | return 0; |
1630 | ||
5bd6b046 AW |
1631 | out_put_xx: |
1632 | if (rx != NULL) | |
1633 | put_ir_rx(rx, true); | |
1634 | if (tx != NULL) | |
1635 | put_ir_tx(tx, true); | |
1636 | out_put_ir: | |
1637 | put_ir_device(ir, true); | |
a68a9b73 | 1638 | out_no_ir: |
f80bdc28 | 1639 | dev_err(&client->dev, "%s: probing IR %s on %s (i2c-%d) failed with %d\n", |
a68a9b73 AW |
1640 | __func__, tx_probe ? "Tx" : "Rx", adap->name, adap->nr, |
1641 | ret); | |
1642 | mutex_unlock(&ir_devices_lock); | |
1643 | return ret; | |
69b1214c JW |
1644 | } |
1645 | ||
69b1214c JW |
1646 | static int __init zilog_init(void) |
1647 | { | |
1648 | int ret; | |
1649 | ||
be4aa815 | 1650 | pr_notice("Zilog/Hauppauge IR driver initializing\n"); |
69b1214c JW |
1651 | |
1652 | mutex_init(&tx_data_lock); | |
1653 | ||
1654 | request_module("firmware_class"); | |
1655 | ||
1656 | ret = i2c_add_driver(&driver); | |
1657 | if (ret) | |
be4aa815 | 1658 | pr_err("initialization failed\n"); |
69b1214c | 1659 | else |
be4aa815 | 1660 | pr_notice("initialization complete\n"); |
69b1214c JW |
1661 | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | static void __exit zilog_exit(void) | |
1666 | { | |
1667 | i2c_del_driver(&driver); | |
1668 | /* if loaded */ | |
1669 | fw_unload(); | |
be4aa815 | 1670 | pr_notice("Zilog/Hauppauge IR driver unloaded\n"); |
69b1214c JW |
1671 | } |
1672 | ||
1673 | module_init(zilog_init); | |
1674 | module_exit(zilog_exit); | |
1675 | ||
1676 | MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)"); | |
1677 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " | |
c2790c71 AW |
1678 | "Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver, " |
1679 | "Andy Walls"); | |
69b1214c JW |
1680 | MODULE_LICENSE("GPL"); |
1681 | /* for compat with old name, which isn't all that accurate anymore */ | |
1682 | MODULE_ALIAS("lirc_pvr150"); | |
1683 | ||
1684 | module_param(minor, int, 0444); | |
1685 | MODULE_PARM_DESC(minor, "Preferred minor device number"); | |
1686 | ||
1687 | module_param(debug, bool, 0644); | |
1688 | MODULE_PARM_DESC(debug, "Enable debugging messages"); | |
1689 | ||
a68a9b73 AW |
1690 | module_param(tx_only, bool, 0644); |
1691 | MODULE_PARM_DESC(tx_only, "Only handle the IR transmit function"); |