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9881fe0c HV |
1 | /* |
2 | * cec-adap.c - HDMI Consumer Electronics Control framework - CEC adapter | |
3 | * | |
4 | * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved. | |
5 | * | |
6 | * This program is free software; you may redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
9 | * | |
10 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
11 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
12 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
13 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
14 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
15 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
16 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
17 | * SOFTWARE. | |
18 | */ | |
19 | ||
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/kmod.h> | |
25 | #include <linux/ktime.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/types.h> | |
30 | ||
31 | #include "cec-priv.h" | |
32 | ||
33 | static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx); | |
34 | static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx); | |
35 | ||
36 | /* | |
37 | * 400 ms is the time it takes for one 16 byte message to be | |
38 | * transferred and 5 is the maximum number of retries. Add | |
39 | * another 100 ms as a margin. So if the transmit doesn't | |
40 | * finish before that time something is really wrong and we | |
41 | * have to time out. | |
42 | * | |
43 | * This is a sign that something it really wrong and a warning | |
44 | * will be issued. | |
45 | */ | |
46 | #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100) | |
47 | ||
48 | #define call_op(adap, op, arg...) \ | |
49 | (adap->ops->op ? adap->ops->op(adap, ## arg) : 0) | |
50 | ||
51 | #define call_void_op(adap, op, arg...) \ | |
52 | do { \ | |
53 | if (adap->ops->op) \ | |
54 | adap->ops->op(adap, ## arg); \ | |
55 | } while (0) | |
56 | ||
57 | static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr) | |
58 | { | |
59 | int i; | |
60 | ||
61 | for (i = 0; i < adap->log_addrs.num_log_addrs; i++) | |
62 | if (adap->log_addrs.log_addr[i] == log_addr) | |
63 | return i; | |
64 | return -1; | |
65 | } | |
66 | ||
67 | static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr) | |
68 | { | |
69 | int i = cec_log_addr2idx(adap, log_addr); | |
70 | ||
71 | return adap->log_addrs.primary_device_type[i < 0 ? 0 : i]; | |
72 | } | |
73 | ||
74 | /* | |
75 | * Queue a new event for this filehandle. If ts == 0, then set it | |
76 | * to the current time. | |
77 | * | |
78 | * The two events that are currently defined do not need to keep track | |
79 | * of intermediate events, so no actual queue of events is needed, | |
80 | * instead just store the latest state and the total number of lost | |
81 | * messages. | |
82 | * | |
83 | * Should new events be added in the future that require intermediate | |
84 | * results to be queued as well, then a proper queue data structure is | |
85 | * required. But until then, just keep it simple. | |
86 | */ | |
87 | void cec_queue_event_fh(struct cec_fh *fh, | |
88 | const struct cec_event *new_ev, u64 ts) | |
89 | { | |
90 | struct cec_event *ev = &fh->events[new_ev->event - 1]; | |
91 | ||
92 | if (ts == 0) | |
93 | ts = ktime_get_ns(); | |
94 | ||
95 | mutex_lock(&fh->lock); | |
96 | if (new_ev->event == CEC_EVENT_LOST_MSGS && | |
97 | fh->pending_events & (1 << new_ev->event)) { | |
98 | /* | |
99 | * If there is already a lost_msgs event, then just | |
100 | * update the lost_msgs count. This effectively | |
101 | * merges the old and new events into one. | |
102 | */ | |
103 | ev->lost_msgs.lost_msgs += new_ev->lost_msgs.lost_msgs; | |
104 | goto unlock; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Intermediate states are not interesting, so just | |
109 | * overwrite any older event. | |
110 | */ | |
111 | *ev = *new_ev; | |
112 | ev->ts = ts; | |
113 | fh->pending_events |= 1 << new_ev->event; | |
114 | ||
115 | unlock: | |
116 | mutex_unlock(&fh->lock); | |
117 | wake_up_interruptible(&fh->wait); | |
118 | } | |
119 | ||
120 | /* Queue a new event for all open filehandles. */ | |
121 | static void cec_queue_event(struct cec_adapter *adap, | |
122 | const struct cec_event *ev) | |
123 | { | |
124 | u64 ts = ktime_get_ns(); | |
125 | struct cec_fh *fh; | |
126 | ||
62148f09 | 127 | mutex_lock(&adap->devnode.lock); |
9881fe0c HV |
128 | list_for_each_entry(fh, &adap->devnode.fhs, list) |
129 | cec_queue_event_fh(fh, ev, ts); | |
62148f09 | 130 | mutex_unlock(&adap->devnode.lock); |
9881fe0c HV |
131 | } |
132 | ||
133 | /* | |
134 | * Queue a new message for this filehandle. If there is no more room | |
135 | * in the queue, then send the LOST_MSGS event instead. | |
136 | */ | |
137 | static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg) | |
138 | { | |
139 | static const struct cec_event ev_lost_msg = { | |
6a91d60a | 140 | .ts = 0, |
9881fe0c | 141 | .event = CEC_EVENT_LOST_MSGS, |
6a91d60a AM |
142 | .flags = 0, |
143 | { | |
144 | .lost_msgs.lost_msgs = 1, | |
145 | }, | |
9881fe0c HV |
146 | }; |
147 | struct cec_msg_entry *entry; | |
148 | ||
149 | mutex_lock(&fh->lock); | |
150 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
151 | if (!entry) | |
152 | goto lost_msgs; | |
153 | ||
154 | entry->msg = *msg; | |
155 | /* Add new msg at the end of the queue */ | |
156 | list_add_tail(&entry->list, &fh->msgs); | |
157 | ||
158 | /* | |
11065f85 | 159 | * if the queue now has more than CEC_MAX_MSG_RX_QUEUE_SZ |
9881fe0c HV |
160 | * messages, drop the oldest one and send a lost message event. |
161 | */ | |
11065f85 | 162 | if (fh->queued_msgs == CEC_MAX_MSG_RX_QUEUE_SZ) { |
9881fe0c HV |
163 | list_del(&entry->list); |
164 | goto lost_msgs; | |
165 | } | |
166 | fh->queued_msgs++; | |
167 | mutex_unlock(&fh->lock); | |
168 | wake_up_interruptible(&fh->wait); | |
169 | return; | |
170 | ||
171 | lost_msgs: | |
172 | mutex_unlock(&fh->lock); | |
173 | cec_queue_event_fh(fh, &ev_lost_msg, 0); | |
174 | } | |
175 | ||
176 | /* | |
177 | * Queue the message for those filehandles that are in monitor mode. | |
178 | * If valid_la is true (this message is for us or was sent by us), | |
179 | * then pass it on to any monitoring filehandle. If this message | |
180 | * isn't for us or from us, then only give it to filehandles that | |
181 | * are in MONITOR_ALL mode. | |
182 | * | |
183 | * This can only happen if the CEC_CAP_MONITOR_ALL capability is | |
184 | * set and the CEC adapter was placed in 'monitor all' mode. | |
185 | */ | |
186 | static void cec_queue_msg_monitor(struct cec_adapter *adap, | |
187 | const struct cec_msg *msg, | |
188 | bool valid_la) | |
189 | { | |
190 | struct cec_fh *fh; | |
191 | u32 monitor_mode = valid_la ? CEC_MODE_MONITOR : | |
192 | CEC_MODE_MONITOR_ALL; | |
193 | ||
62148f09 | 194 | mutex_lock(&adap->devnode.lock); |
9881fe0c HV |
195 | list_for_each_entry(fh, &adap->devnode.fhs, list) { |
196 | if (fh->mode_follower >= monitor_mode) | |
197 | cec_queue_msg_fh(fh, msg); | |
198 | } | |
62148f09 | 199 | mutex_unlock(&adap->devnode.lock); |
9881fe0c HV |
200 | } |
201 | ||
202 | /* | |
203 | * Queue the message for follower filehandles. | |
204 | */ | |
205 | static void cec_queue_msg_followers(struct cec_adapter *adap, | |
206 | const struct cec_msg *msg) | |
207 | { | |
208 | struct cec_fh *fh; | |
209 | ||
62148f09 | 210 | mutex_lock(&adap->devnode.lock); |
9881fe0c HV |
211 | list_for_each_entry(fh, &adap->devnode.fhs, list) { |
212 | if (fh->mode_follower == CEC_MODE_FOLLOWER) | |
213 | cec_queue_msg_fh(fh, msg); | |
214 | } | |
62148f09 | 215 | mutex_unlock(&adap->devnode.lock); |
9881fe0c HV |
216 | } |
217 | ||
218 | /* Notify userspace of an adapter state change. */ | |
219 | static void cec_post_state_event(struct cec_adapter *adap) | |
220 | { | |
221 | struct cec_event ev = { | |
222 | .event = CEC_EVENT_STATE_CHANGE, | |
223 | }; | |
224 | ||
225 | ev.state_change.phys_addr = adap->phys_addr; | |
226 | ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask; | |
227 | cec_queue_event(adap, &ev); | |
228 | } | |
229 | ||
230 | /* | |
231 | * A CEC transmit (and a possible wait for reply) completed. | |
232 | * If this was in blocking mode, then complete it, otherwise | |
233 | * queue the message for userspace to dequeue later. | |
234 | * | |
235 | * This function is called with adap->lock held. | |
236 | */ | |
237 | static void cec_data_completed(struct cec_data *data) | |
238 | { | |
239 | /* | |
240 | * Delete this transmit from the filehandle's xfer_list since | |
241 | * we're done with it. | |
242 | * | |
243 | * Note that if the filehandle is closed before this transmit | |
244 | * finished, then the release() function will set data->fh to NULL. | |
245 | * Without that we would be referring to a closed filehandle. | |
246 | */ | |
247 | if (data->fh) | |
248 | list_del(&data->xfer_list); | |
249 | ||
250 | if (data->blocking) { | |
251 | /* | |
252 | * Someone is blocking so mark the message as completed | |
253 | * and call complete. | |
254 | */ | |
255 | data->completed = true; | |
256 | complete(&data->c); | |
257 | } else { | |
258 | /* | |
259 | * No blocking, so just queue the message if needed and | |
260 | * free the memory. | |
261 | */ | |
262 | if (data->fh) | |
263 | cec_queue_msg_fh(data->fh, &data->msg); | |
264 | kfree(data); | |
265 | } | |
266 | } | |
267 | ||
268 | /* | |
269 | * A pending CEC transmit needs to be cancelled, either because the CEC | |
270 | * adapter is disabled or the transmit takes an impossibly long time to | |
271 | * finish. | |
272 | * | |
273 | * This function is called with adap->lock held. | |
274 | */ | |
275 | static void cec_data_cancel(struct cec_data *data) | |
276 | { | |
277 | /* | |
278 | * It's either the current transmit, or it is a pending | |
279 | * transmit. Take the appropriate action to clear it. | |
280 | */ | |
11065f85 | 281 | if (data->adap->transmitting == data) { |
9881fe0c | 282 | data->adap->transmitting = NULL; |
11065f85 | 283 | } else { |
9881fe0c | 284 | list_del_init(&data->list); |
11065f85 HV |
285 | if (!(data->msg.tx_status & CEC_TX_STATUS_OK)) |
286 | data->adap->transmit_queue_sz--; | |
287 | } | |
9881fe0c HV |
288 | |
289 | /* Mark it as an error */ | |
980e0b36 | 290 | data->msg.tx_ts = ktime_get_ns(); |
9881fe0c HV |
291 | data->msg.tx_status = CEC_TX_STATUS_ERROR | |
292 | CEC_TX_STATUS_MAX_RETRIES; | |
293 | data->attempts = 0; | |
294 | data->msg.tx_error_cnt = 1; | |
9881fe0c HV |
295 | /* Queue transmitted message for monitoring purposes */ |
296 | cec_queue_msg_monitor(data->adap, &data->msg, 1); | |
297 | ||
298 | cec_data_completed(data); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Main CEC state machine | |
303 | * | |
304 | * Wait until the thread should be stopped, or we are not transmitting and | |
305 | * a new transmit message is queued up, in which case we start transmitting | |
306 | * that message. When the adapter finished transmitting the message it will | |
307 | * call cec_transmit_done(). | |
308 | * | |
309 | * If the adapter is disabled, then remove all queued messages instead. | |
310 | * | |
311 | * If the current transmit times out, then cancel that transmit. | |
312 | */ | |
313 | int cec_thread_func(void *_adap) | |
314 | { | |
315 | struct cec_adapter *adap = _adap; | |
316 | ||
317 | for (;;) { | |
318 | unsigned int signal_free_time; | |
319 | struct cec_data *data; | |
320 | bool timeout = false; | |
321 | u8 attempts; | |
322 | ||
323 | if (adap->transmitting) { | |
324 | int err; | |
325 | ||
326 | /* | |
327 | * We are transmitting a message, so add a timeout | |
328 | * to prevent the state machine to get stuck waiting | |
329 | * for this message to finalize and add a check to | |
330 | * see if the adapter is disabled in which case the | |
331 | * transmit should be canceled. | |
332 | */ | |
333 | err = wait_event_interruptible_timeout(adap->kthread_waitq, | |
334 | kthread_should_stop() || | |
58ecc29b | 335 | (!adap->is_configured && !adap->is_configuring) || |
9881fe0c HV |
336 | (!adap->transmitting && |
337 | !list_empty(&adap->transmit_queue)), | |
338 | msecs_to_jiffies(CEC_XFER_TIMEOUT_MS)); | |
339 | timeout = err == 0; | |
340 | } else { | |
341 | /* Otherwise we just wait for something to happen. */ | |
342 | wait_event_interruptible(adap->kthread_waitq, | |
343 | kthread_should_stop() || | |
344 | (!adap->transmitting && | |
345 | !list_empty(&adap->transmit_queue))); | |
346 | } | |
347 | ||
348 | mutex_lock(&adap->lock); | |
349 | ||
58ecc29b | 350 | if ((!adap->is_configured && !adap->is_configuring) || |
9881fe0c HV |
351 | kthread_should_stop()) { |
352 | /* | |
353 | * If the adapter is disabled, or we're asked to stop, | |
354 | * then cancel any pending transmits. | |
355 | */ | |
356 | while (!list_empty(&adap->transmit_queue)) { | |
357 | data = list_first_entry(&adap->transmit_queue, | |
358 | struct cec_data, list); | |
359 | cec_data_cancel(data); | |
360 | } | |
361 | if (adap->transmitting) | |
362 | cec_data_cancel(adap->transmitting); | |
363 | ||
364 | /* | |
365 | * Cancel the pending timeout work. We have to unlock | |
366 | * the mutex when flushing the work since | |
367 | * cec_wait_timeout() will take it. This is OK since | |
368 | * no new entries can be added to wait_queue as long | |
369 | * as adap->transmitting is NULL, which it is due to | |
370 | * the cec_data_cancel() above. | |
371 | */ | |
372 | while (!list_empty(&adap->wait_queue)) { | |
373 | data = list_first_entry(&adap->wait_queue, | |
374 | struct cec_data, list); | |
375 | ||
376 | if (!cancel_delayed_work(&data->work)) { | |
377 | mutex_unlock(&adap->lock); | |
378 | flush_scheduled_work(); | |
379 | mutex_lock(&adap->lock); | |
380 | } | |
381 | cec_data_cancel(data); | |
382 | } | |
383 | goto unlock; | |
384 | } | |
385 | ||
386 | if (adap->transmitting && timeout) { | |
387 | /* | |
388 | * If we timeout, then log that. This really shouldn't | |
389 | * happen and is an indication of a faulty CEC adapter | |
390 | * driver, or the CEC bus is in some weird state. | |
391 | */ | |
392 | dprintk(0, "message %*ph timed out!\n", | |
393 | adap->transmitting->msg.len, | |
394 | adap->transmitting->msg.msg); | |
395 | /* Just give up on this. */ | |
396 | cec_data_cancel(adap->transmitting); | |
397 | goto unlock; | |
398 | } | |
399 | ||
400 | /* | |
401 | * If we are still transmitting, or there is nothing new to | |
402 | * transmit, then just continue waiting. | |
403 | */ | |
404 | if (adap->transmitting || list_empty(&adap->transmit_queue)) | |
405 | goto unlock; | |
406 | ||
407 | /* Get a new message to transmit */ | |
408 | data = list_first_entry(&adap->transmit_queue, | |
409 | struct cec_data, list); | |
410 | list_del_init(&data->list); | |
11065f85 | 411 | adap->transmit_queue_sz--; |
9881fe0c HV |
412 | /* Make this the current transmitting message */ |
413 | adap->transmitting = data; | |
414 | ||
415 | /* | |
416 | * Suggested number of attempts as per the CEC 2.0 spec: | |
417 | * 4 attempts is the default, except for 'secondary poll | |
418 | * messages', i.e. poll messages not sent during the adapter | |
419 | * configuration phase when it allocates logical addresses. | |
420 | */ | |
421 | if (data->msg.len == 1 && adap->is_configured) | |
422 | attempts = 2; | |
423 | else | |
424 | attempts = 4; | |
425 | ||
426 | /* Set the suggested signal free time */ | |
427 | if (data->attempts) { | |
428 | /* should be >= 3 data bit periods for a retry */ | |
429 | signal_free_time = CEC_SIGNAL_FREE_TIME_RETRY; | |
430 | } else if (data->new_initiator) { | |
431 | /* should be >= 5 data bit periods for new initiator */ | |
432 | signal_free_time = CEC_SIGNAL_FREE_TIME_NEW_INITIATOR; | |
433 | } else { | |
434 | /* | |
435 | * should be >= 7 data bit periods for sending another | |
436 | * frame immediately after another. | |
437 | */ | |
438 | signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER; | |
439 | } | |
440 | if (data->attempts == 0) | |
441 | data->attempts = attempts; | |
442 | ||
443 | /* Tell the adapter to transmit, cancel on error */ | |
444 | if (adap->ops->adap_transmit(adap, data->attempts, | |
445 | signal_free_time, &data->msg)) | |
446 | cec_data_cancel(data); | |
447 | ||
448 | unlock: | |
449 | mutex_unlock(&adap->lock); | |
450 | ||
451 | if (kthread_should_stop()) | |
452 | break; | |
453 | } | |
454 | return 0; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Called by the CEC adapter if a transmit finished. | |
459 | */ | |
460 | void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt, | |
461 | u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt) | |
462 | { | |
463 | struct cec_data *data; | |
464 | struct cec_msg *msg; | |
980e0b36 | 465 | u64 ts = ktime_get_ns(); |
9881fe0c HV |
466 | |
467 | dprintk(2, "cec_transmit_done %02x\n", status); | |
468 | mutex_lock(&adap->lock); | |
469 | data = adap->transmitting; | |
470 | if (!data) { | |
471 | /* | |
472 | * This can happen if a transmit was issued and the cable is | |
473 | * unplugged while the transmit is ongoing. Ignore this | |
474 | * transmit in that case. | |
475 | */ | |
476 | dprintk(1, "cec_transmit_done without an ongoing transmit!\n"); | |
477 | goto unlock; | |
478 | } | |
479 | ||
480 | msg = &data->msg; | |
481 | ||
482 | /* Drivers must fill in the status! */ | |
483 | WARN_ON(status == 0); | |
980e0b36 | 484 | msg->tx_ts = ts; |
9881fe0c HV |
485 | msg->tx_status |= status; |
486 | msg->tx_arb_lost_cnt += arb_lost_cnt; | |
487 | msg->tx_nack_cnt += nack_cnt; | |
488 | msg->tx_low_drive_cnt += low_drive_cnt; | |
489 | msg->tx_error_cnt += error_cnt; | |
490 | ||
491 | /* Mark that we're done with this transmit */ | |
492 | adap->transmitting = NULL; | |
493 | ||
494 | /* | |
495 | * If there are still retry attempts left and there was an error and | |
496 | * the hardware didn't signal that it retried itself (by setting | |
497 | * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves. | |
498 | */ | |
499 | if (data->attempts > 1 && | |
500 | !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) { | |
501 | /* Retry this message */ | |
502 | data->attempts--; | |
503 | /* Add the message in front of the transmit queue */ | |
504 | list_add(&data->list, &adap->transmit_queue); | |
11065f85 | 505 | adap->transmit_queue_sz++; |
9881fe0c HV |
506 | goto wake_thread; |
507 | } | |
508 | ||
509 | data->attempts = 0; | |
510 | ||
511 | /* Always set CEC_TX_STATUS_MAX_RETRIES on error */ | |
512 | if (!(status & CEC_TX_STATUS_OK)) | |
513 | msg->tx_status |= CEC_TX_STATUS_MAX_RETRIES; | |
514 | ||
515 | /* Queue transmitted message for monitoring purposes */ | |
516 | cec_queue_msg_monitor(adap, msg, 1); | |
517 | ||
86e3577f HV |
518 | if ((status & CEC_TX_STATUS_OK) && adap->is_configured && |
519 | msg->timeout) { | |
9881fe0c HV |
520 | /* |
521 | * Queue the message into the wait queue if we want to wait | |
522 | * for a reply. | |
523 | */ | |
524 | list_add_tail(&data->list, &adap->wait_queue); | |
525 | schedule_delayed_work(&data->work, | |
526 | msecs_to_jiffies(msg->timeout)); | |
527 | } else { | |
528 | /* Otherwise we're done */ | |
529 | cec_data_completed(data); | |
530 | } | |
531 | ||
532 | wake_thread: | |
533 | /* | |
534 | * Wake up the main thread to see if another message is ready | |
535 | * for transmitting or to retry the current message. | |
536 | */ | |
537 | wake_up_interruptible(&adap->kthread_waitq); | |
538 | unlock: | |
539 | mutex_unlock(&adap->lock); | |
540 | } | |
541 | EXPORT_SYMBOL_GPL(cec_transmit_done); | |
542 | ||
543 | /* | |
544 | * Called when waiting for a reply times out. | |
545 | */ | |
546 | static void cec_wait_timeout(struct work_struct *work) | |
547 | { | |
548 | struct cec_data *data = container_of(work, struct cec_data, work.work); | |
549 | struct cec_adapter *adap = data->adap; | |
550 | ||
551 | mutex_lock(&adap->lock); | |
552 | /* | |
553 | * Sanity check in case the timeout and the arrival of the message | |
554 | * happened at the same time. | |
555 | */ | |
556 | if (list_empty(&data->list)) | |
557 | goto unlock; | |
558 | ||
559 | /* Mark the message as timed out */ | |
560 | list_del_init(&data->list); | |
980e0b36 | 561 | data->msg.rx_ts = ktime_get_ns(); |
9881fe0c HV |
562 | data->msg.rx_status = CEC_RX_STATUS_TIMEOUT; |
563 | cec_data_completed(data); | |
564 | unlock: | |
565 | mutex_unlock(&adap->lock); | |
566 | } | |
567 | ||
568 | /* | |
569 | * Transmit a message. The fh argument may be NULL if the transmit is not | |
570 | * associated with a specific filehandle. | |
571 | * | |
572 | * This function is called with adap->lock held. | |
573 | */ | |
574 | int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg, | |
575 | struct cec_fh *fh, bool block) | |
576 | { | |
577 | struct cec_data *data; | |
578 | u8 last_initiator = 0xff; | |
579 | unsigned int timeout; | |
580 | int res = 0; | |
581 | ||
40df3a7e HV |
582 | msg->rx_ts = 0; |
583 | msg->tx_ts = 0; | |
584 | msg->rx_status = 0; | |
585 | msg->tx_status = 0; | |
586 | msg->tx_arb_lost_cnt = 0; | |
587 | msg->tx_nack_cnt = 0; | |
588 | msg->tx_low_drive_cnt = 0; | |
589 | msg->tx_error_cnt = 0; | |
590 | msg->flags = 0; | |
591 | msg->sequence = ++adap->sequence; | |
592 | if (!msg->sequence) | |
593 | msg->sequence = ++adap->sequence; | |
594 | ||
9881fe0c HV |
595 | if (msg->reply && msg->timeout == 0) { |
596 | /* Make sure the timeout isn't 0. */ | |
597 | msg->timeout = 1000; | |
598 | } | |
599 | ||
600 | /* Sanity checks */ | |
601 | if (msg->len == 0 || msg->len > CEC_MAX_MSG_SIZE) { | |
602 | dprintk(1, "cec_transmit_msg: invalid length %d\n", msg->len); | |
603 | return -EINVAL; | |
604 | } | |
605 | if (msg->timeout && msg->len == 1) { | |
606 | dprintk(1, "cec_transmit_msg: can't reply for poll msg\n"); | |
607 | return -EINVAL; | |
608 | } | |
045344c3 | 609 | memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len); |
9881fe0c HV |
610 | if (msg->len == 1) { |
611 | if (cec_msg_initiator(msg) != 0xf || | |
612 | cec_msg_destination(msg) == 0xf) { | |
613 | dprintk(1, "cec_transmit_msg: invalid poll message\n"); | |
614 | return -EINVAL; | |
615 | } | |
616 | if (cec_has_log_addr(adap, cec_msg_destination(msg))) { | |
617 | /* | |
618 | * If the destination is a logical address our adapter | |
619 | * has already claimed, then just NACK this. | |
620 | * It depends on the hardware what it will do with a | |
621 | * POLL to itself (some OK this), so it is just as | |
622 | * easy to handle it here so the behavior will be | |
623 | * consistent. | |
624 | */ | |
9a3f14ea | 625 | msg->tx_ts = ktime_get_ns(); |
9881fe0c HV |
626 | msg->tx_status = CEC_TX_STATUS_NACK | |
627 | CEC_TX_STATUS_MAX_RETRIES; | |
628 | msg->tx_nack_cnt = 1; | |
629 | return 0; | |
630 | } | |
631 | } | |
632 | if (msg->len > 1 && !cec_msg_is_broadcast(msg) && | |
633 | cec_has_log_addr(adap, cec_msg_destination(msg))) { | |
634 | dprintk(1, "cec_transmit_msg: destination is the adapter itself\n"); | |
635 | return -EINVAL; | |
636 | } | |
637 | if (cec_msg_initiator(msg) != 0xf && | |
638 | !cec_has_log_addr(adap, cec_msg_initiator(msg))) { | |
639 | dprintk(1, "cec_transmit_msg: initiator has unknown logical address %d\n", | |
640 | cec_msg_initiator(msg)); | |
641 | return -EINVAL; | |
642 | } | |
643 | if (!adap->is_configured && !adap->is_configuring) | |
644 | return -ENONET; | |
645 | ||
11065f85 HV |
646 | if (adap->transmit_queue_sz >= CEC_MAX_MSG_TX_QUEUE_SZ) |
647 | return -EBUSY; | |
648 | ||
9881fe0c HV |
649 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
650 | if (!data) | |
651 | return -ENOMEM; | |
652 | ||
653 | if (msg->len > 1 && msg->msg[1] == CEC_MSG_CDC_MESSAGE) { | |
654 | msg->msg[2] = adap->phys_addr >> 8; | |
655 | msg->msg[3] = adap->phys_addr & 0xff; | |
656 | } | |
657 | ||
658 | if (msg->timeout) | |
659 | dprintk(2, "cec_transmit_msg: %*ph (wait for 0x%02x%s)\n", | |
660 | msg->len, msg->msg, msg->reply, !block ? ", nb" : ""); | |
661 | else | |
662 | dprintk(2, "cec_transmit_msg: %*ph%s\n", | |
663 | msg->len, msg->msg, !block ? " (nb)" : ""); | |
664 | ||
9881fe0c HV |
665 | data->msg = *msg; |
666 | data->fh = fh; | |
667 | data->adap = adap; | |
668 | data->blocking = block; | |
669 | ||
670 | /* | |
671 | * Determine if this message follows a message from the same | |
672 | * initiator. Needed to determine the free signal time later on. | |
673 | */ | |
674 | if (msg->len > 1) { | |
675 | if (!(list_empty(&adap->transmit_queue))) { | |
676 | const struct cec_data *last; | |
677 | ||
678 | last = list_last_entry(&adap->transmit_queue, | |
679 | const struct cec_data, list); | |
680 | last_initiator = cec_msg_initiator(&last->msg); | |
681 | } else if (adap->transmitting) { | |
682 | last_initiator = | |
683 | cec_msg_initiator(&adap->transmitting->msg); | |
684 | } | |
685 | } | |
686 | data->new_initiator = last_initiator != cec_msg_initiator(msg); | |
687 | init_completion(&data->c); | |
688 | INIT_DELAYED_WORK(&data->work, cec_wait_timeout); | |
689 | ||
9881fe0c HV |
690 | if (fh) |
691 | list_add_tail(&data->xfer_list, &fh->xfer_list); | |
692 | list_add_tail(&data->list, &adap->transmit_queue); | |
11065f85 | 693 | adap->transmit_queue_sz++; |
9881fe0c HV |
694 | if (!adap->transmitting) |
695 | wake_up_interruptible(&adap->kthread_waitq); | |
696 | ||
697 | /* All done if we don't need to block waiting for completion */ | |
698 | if (!block) | |
699 | return 0; | |
700 | ||
701 | /* | |
702 | * If we don't get a completion before this time something is really | |
703 | * wrong and we time out. | |
704 | */ | |
705 | timeout = CEC_XFER_TIMEOUT_MS; | |
706 | /* Add the requested timeout if we have to wait for a reply as well */ | |
707 | if (msg->timeout) | |
708 | timeout += msg->timeout; | |
709 | ||
710 | /* | |
711 | * Release the lock and wait, retake the lock afterwards. | |
712 | */ | |
713 | mutex_unlock(&adap->lock); | |
714 | res = wait_for_completion_killable_timeout(&data->c, | |
715 | msecs_to_jiffies(timeout)); | |
716 | mutex_lock(&adap->lock); | |
717 | ||
718 | if (data->completed) { | |
719 | /* The transmit completed (possibly with an error) */ | |
720 | *msg = data->msg; | |
721 | kfree(data); | |
722 | return 0; | |
723 | } | |
724 | /* | |
725 | * The wait for completion timed out or was interrupted, so mark this | |
726 | * as non-blocking and disconnect from the filehandle since it is | |
727 | * still 'in flight'. When it finally completes it will just drop the | |
728 | * result silently. | |
729 | */ | |
730 | data->blocking = false; | |
731 | if (data->fh) | |
732 | list_del(&data->xfer_list); | |
733 | data->fh = NULL; | |
734 | ||
735 | if (res == 0) { /* timed out */ | |
736 | /* Check if the reply or the transmit failed */ | |
737 | if (msg->timeout && (msg->tx_status & CEC_TX_STATUS_OK)) | |
738 | msg->rx_status = CEC_RX_STATUS_TIMEOUT; | |
739 | else | |
740 | msg->tx_status = CEC_TX_STATUS_MAX_RETRIES; | |
741 | } | |
742 | return res > 0 ? 0 : res; | |
743 | } | |
744 | ||
745 | /* Helper function to be used by drivers and this framework. */ | |
746 | int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg, | |
747 | bool block) | |
748 | { | |
749 | int ret; | |
750 | ||
751 | mutex_lock(&adap->lock); | |
752 | ret = cec_transmit_msg_fh(adap, msg, NULL, block); | |
753 | mutex_unlock(&adap->lock); | |
754 | return ret; | |
755 | } | |
756 | EXPORT_SYMBOL_GPL(cec_transmit_msg); | |
757 | ||
758 | /* | |
759 | * I don't like forward references but without this the low-level | |
760 | * cec_received_msg() function would come after a bunch of high-level | |
761 | * CEC protocol handling functions. That was very confusing. | |
762 | */ | |
763 | static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg, | |
764 | bool is_reply); | |
765 | ||
766 | /* Called by the CEC adapter if a message is received */ | |
767 | void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg) | |
768 | { | |
769 | struct cec_data *data; | |
770 | u8 msg_init = cec_msg_initiator(msg); | |
771 | u8 msg_dest = cec_msg_destination(msg); | |
772 | bool is_reply = false; | |
773 | bool valid_la = true; | |
774 | ||
52d802d6 HV |
775 | if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE)) |
776 | return; | |
777 | ||
980e0b36 | 778 | msg->rx_ts = ktime_get_ns(); |
9881fe0c | 779 | msg->rx_status = CEC_RX_STATUS_OK; |
9881fe0c | 780 | msg->sequence = msg->reply = msg->timeout = 0; |
980e0b36 HV |
781 | msg->tx_status = 0; |
782 | msg->tx_ts = 0; | |
9881fe0c | 783 | msg->flags = 0; |
045344c3 | 784 | memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len); |
9881fe0c | 785 | |
980e0b36 | 786 | mutex_lock(&adap->lock); |
9881fe0c HV |
787 | dprintk(2, "cec_received_msg: %*ph\n", msg->len, msg->msg); |
788 | ||
789 | /* Check if this message was for us (directed or broadcast). */ | |
790 | if (!cec_msg_is_broadcast(msg)) | |
791 | valid_la = cec_has_log_addr(adap, msg_dest); | |
792 | ||
793 | /* It's a valid message and not a poll or CDC message */ | |
794 | if (valid_la && msg->len > 1 && msg->msg[1] != CEC_MSG_CDC_MESSAGE) { | |
795 | u8 cmd = msg->msg[1]; | |
796 | bool abort = cmd == CEC_MSG_FEATURE_ABORT; | |
797 | ||
798 | /* The aborted command is in msg[2] */ | |
799 | if (abort) | |
800 | cmd = msg->msg[2]; | |
801 | ||
802 | /* | |
803 | * Walk over all transmitted messages that are waiting for a | |
804 | * reply. | |
805 | */ | |
806 | list_for_each_entry(data, &adap->wait_queue, list) { | |
807 | struct cec_msg *dst = &data->msg; | |
9881fe0c HV |
808 | |
809 | /* Does the command match? */ | |
810 | if ((abort && cmd != dst->msg[1]) || | |
811 | (!abort && cmd != dst->reply)) | |
812 | continue; | |
813 | ||
814 | /* Does the addressing match? */ | |
815 | if (msg_init != cec_msg_destination(dst) && | |
816 | !cec_msg_is_broadcast(dst)) | |
817 | continue; | |
818 | ||
819 | /* We got a reply */ | |
980e0b36 HV |
820 | memcpy(dst->msg, msg->msg, msg->len); |
821 | dst->len = msg->len; | |
822 | dst->rx_ts = msg->rx_ts; | |
823 | dst->rx_status = msg->rx_status; | |
86e3577f | 824 | if (abort) |
9881fe0c | 825 | dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT; |
9881fe0c HV |
826 | /* Remove it from the wait_queue */ |
827 | list_del_init(&data->list); | |
828 | ||
829 | /* Cancel the pending timeout work */ | |
830 | if (!cancel_delayed_work(&data->work)) { | |
831 | mutex_unlock(&adap->lock); | |
832 | flush_scheduled_work(); | |
833 | mutex_lock(&adap->lock); | |
834 | } | |
835 | /* | |
836 | * Mark this as a reply, provided someone is still | |
837 | * waiting for the answer. | |
838 | */ | |
839 | if (data->fh) | |
840 | is_reply = true; | |
841 | cec_data_completed(data); | |
842 | break; | |
843 | } | |
844 | } | |
845 | mutex_unlock(&adap->lock); | |
846 | ||
847 | /* Pass the message on to any monitoring filehandles */ | |
848 | cec_queue_msg_monitor(adap, msg, valid_la); | |
849 | ||
850 | /* We're done if it is not for us or a poll message */ | |
851 | if (!valid_la || msg->len <= 1) | |
852 | return; | |
853 | ||
3e92d8b2 HV |
854 | if (adap->log_addrs.log_addr_mask == 0) |
855 | return; | |
856 | ||
9881fe0c HV |
857 | /* |
858 | * Process the message on the protocol level. If is_reply is true, | |
859 | * then cec_receive_notify() won't pass on the reply to the listener(s) | |
860 | * since that was already done by cec_data_completed() above. | |
861 | */ | |
862 | cec_receive_notify(adap, msg, is_reply); | |
863 | } | |
864 | EXPORT_SYMBOL_GPL(cec_received_msg); | |
865 | ||
866 | /* Logical Address Handling */ | |
867 | ||
868 | /* | |
869 | * Attempt to claim a specific logical address. | |
870 | * | |
871 | * This function is called with adap->lock held. | |
872 | */ | |
873 | static int cec_config_log_addr(struct cec_adapter *adap, | |
874 | unsigned int idx, | |
875 | unsigned int log_addr) | |
876 | { | |
877 | struct cec_log_addrs *las = &adap->log_addrs; | |
878 | struct cec_msg msg = { }; | |
879 | int err; | |
880 | ||
881 | if (cec_has_log_addr(adap, log_addr)) | |
882 | return 0; | |
883 | ||
884 | /* Send poll message */ | |
885 | msg.len = 1; | |
886 | msg.msg[0] = 0xf0 | log_addr; | |
887 | err = cec_transmit_msg_fh(adap, &msg, NULL, true); | |
888 | ||
889 | /* | |
890 | * While trying to poll the physical address was reset | |
891 | * and the adapter was unconfigured, so bail out. | |
892 | */ | |
893 | if (!adap->is_configuring) | |
894 | return -EINTR; | |
895 | ||
896 | if (err) | |
897 | return err; | |
898 | ||
899 | if (msg.tx_status & CEC_TX_STATUS_OK) | |
900 | return 0; | |
901 | ||
902 | /* | |
903 | * Message not acknowledged, so this logical | |
904 | * address is free to use. | |
905 | */ | |
906 | err = adap->ops->adap_log_addr(adap, log_addr); | |
907 | if (err) | |
908 | return err; | |
909 | ||
910 | las->log_addr[idx] = log_addr; | |
911 | las->log_addr_mask |= 1 << log_addr; | |
912 | adap->phys_addrs[log_addr] = adap->phys_addr; | |
913 | ||
914 | dprintk(2, "claimed addr %d (%d)\n", log_addr, | |
915 | las->primary_device_type[idx]); | |
916 | return 1; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Unconfigure the adapter: clear all logical addresses and send | |
921 | * the state changed event. | |
922 | * | |
923 | * This function is called with adap->lock held. | |
924 | */ | |
925 | static void cec_adap_unconfigure(struct cec_adapter *adap) | |
926 | { | |
927 | WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID)); | |
928 | adap->log_addrs.log_addr_mask = 0; | |
929 | adap->is_configuring = false; | |
930 | adap->is_configured = false; | |
931 | memset(adap->phys_addrs, 0xff, sizeof(adap->phys_addrs)); | |
932 | wake_up_interruptible(&adap->kthread_waitq); | |
933 | cec_post_state_event(adap); | |
934 | } | |
935 | ||
936 | /* | |
937 | * Attempt to claim the required logical addresses. | |
938 | */ | |
939 | static int cec_config_thread_func(void *arg) | |
940 | { | |
941 | /* The various LAs for each type of device */ | |
942 | static const u8 tv_log_addrs[] = { | |
943 | CEC_LOG_ADDR_TV, CEC_LOG_ADDR_SPECIFIC, | |
944 | CEC_LOG_ADDR_INVALID | |
945 | }; | |
946 | static const u8 record_log_addrs[] = { | |
947 | CEC_LOG_ADDR_RECORD_1, CEC_LOG_ADDR_RECORD_2, | |
948 | CEC_LOG_ADDR_RECORD_3, | |
949 | CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2, | |
950 | CEC_LOG_ADDR_INVALID | |
951 | }; | |
952 | static const u8 tuner_log_addrs[] = { | |
953 | CEC_LOG_ADDR_TUNER_1, CEC_LOG_ADDR_TUNER_2, | |
954 | CEC_LOG_ADDR_TUNER_3, CEC_LOG_ADDR_TUNER_4, | |
955 | CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2, | |
956 | CEC_LOG_ADDR_INVALID | |
957 | }; | |
958 | static const u8 playback_log_addrs[] = { | |
959 | CEC_LOG_ADDR_PLAYBACK_1, CEC_LOG_ADDR_PLAYBACK_2, | |
960 | CEC_LOG_ADDR_PLAYBACK_3, | |
961 | CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2, | |
962 | CEC_LOG_ADDR_INVALID | |
963 | }; | |
964 | static const u8 audiosystem_log_addrs[] = { | |
965 | CEC_LOG_ADDR_AUDIOSYSTEM, | |
966 | CEC_LOG_ADDR_INVALID | |
967 | }; | |
968 | static const u8 specific_use_log_addrs[] = { | |
969 | CEC_LOG_ADDR_SPECIFIC, | |
970 | CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2, | |
971 | CEC_LOG_ADDR_INVALID | |
972 | }; | |
973 | static const u8 *type2addrs[6] = { | |
974 | [CEC_LOG_ADDR_TYPE_TV] = tv_log_addrs, | |
975 | [CEC_LOG_ADDR_TYPE_RECORD] = record_log_addrs, | |
976 | [CEC_LOG_ADDR_TYPE_TUNER] = tuner_log_addrs, | |
977 | [CEC_LOG_ADDR_TYPE_PLAYBACK] = playback_log_addrs, | |
978 | [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = audiosystem_log_addrs, | |
979 | [CEC_LOG_ADDR_TYPE_SPECIFIC] = specific_use_log_addrs, | |
980 | }; | |
981 | static const u16 type2mask[] = { | |
982 | [CEC_LOG_ADDR_TYPE_TV] = CEC_LOG_ADDR_MASK_TV, | |
983 | [CEC_LOG_ADDR_TYPE_RECORD] = CEC_LOG_ADDR_MASK_RECORD, | |
984 | [CEC_LOG_ADDR_TYPE_TUNER] = CEC_LOG_ADDR_MASK_TUNER, | |
985 | [CEC_LOG_ADDR_TYPE_PLAYBACK] = CEC_LOG_ADDR_MASK_PLAYBACK, | |
986 | [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = CEC_LOG_ADDR_MASK_AUDIOSYSTEM, | |
987 | [CEC_LOG_ADDR_TYPE_SPECIFIC] = CEC_LOG_ADDR_MASK_SPECIFIC, | |
988 | }; | |
989 | struct cec_adapter *adap = arg; | |
990 | struct cec_log_addrs *las = &adap->log_addrs; | |
991 | int err; | |
992 | int i, j; | |
993 | ||
994 | mutex_lock(&adap->lock); | |
995 | dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n", | |
996 | cec_phys_addr_exp(adap->phys_addr), las->num_log_addrs); | |
997 | las->log_addr_mask = 0; | |
998 | ||
999 | if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED) | |
1000 | goto configured; | |
1001 | ||
1002 | for (i = 0; i < las->num_log_addrs; i++) { | |
1003 | unsigned int type = las->log_addr_type[i]; | |
1004 | const u8 *la_list; | |
1005 | u8 last_la; | |
1006 | ||
1007 | /* | |
1008 | * The TV functionality can only map to physical address 0. | |
1009 | * For any other address, try the Specific functionality | |
1010 | * instead as per the spec. | |
1011 | */ | |
1012 | if (adap->phys_addr && type == CEC_LOG_ADDR_TYPE_TV) | |
1013 | type = CEC_LOG_ADDR_TYPE_SPECIFIC; | |
1014 | ||
1015 | la_list = type2addrs[type]; | |
1016 | last_la = las->log_addr[i]; | |
1017 | las->log_addr[i] = CEC_LOG_ADDR_INVALID; | |
1018 | if (last_la == CEC_LOG_ADDR_INVALID || | |
1019 | last_la == CEC_LOG_ADDR_UNREGISTERED || | |
1020 | !(last_la & type2mask[type])) | |
1021 | last_la = la_list[0]; | |
1022 | ||
1023 | err = cec_config_log_addr(adap, i, last_la); | |
1024 | if (err > 0) /* Reused last LA */ | |
1025 | continue; | |
1026 | ||
1027 | if (err < 0) | |
1028 | goto unconfigure; | |
1029 | ||
1030 | for (j = 0; la_list[j] != CEC_LOG_ADDR_INVALID; j++) { | |
1031 | /* Tried this one already, skip it */ | |
1032 | if (la_list[j] == last_la) | |
1033 | continue; | |
1034 | /* The backup addresses are CEC 2.0 specific */ | |
1035 | if ((la_list[j] == CEC_LOG_ADDR_BACKUP_1 || | |
1036 | la_list[j] == CEC_LOG_ADDR_BACKUP_2) && | |
1037 | las->cec_version < CEC_OP_CEC_VERSION_2_0) | |
1038 | continue; | |
1039 | ||
1040 | err = cec_config_log_addr(adap, i, la_list[j]); | |
1041 | if (err == 0) /* LA is in use */ | |
1042 | continue; | |
1043 | if (err < 0) | |
1044 | goto unconfigure; | |
1045 | /* Done, claimed an LA */ | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | if (la_list[j] == CEC_LOG_ADDR_INVALID) | |
1050 | dprintk(1, "could not claim LA %d\n", i); | |
1051 | } | |
1052 | ||
dcceb1ea HV |
1053 | if (adap->log_addrs.log_addr_mask == 0 && |
1054 | !(las->flags & CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK)) | |
1055 | goto unconfigure; | |
1056 | ||
9881fe0c HV |
1057 | configured: |
1058 | if (adap->log_addrs.log_addr_mask == 0) { | |
1059 | /* Fall back to unregistered */ | |
1060 | las->log_addr[0] = CEC_LOG_ADDR_UNREGISTERED; | |
1061 | las->log_addr_mask = 1 << las->log_addr[0]; | |
0c1d61b0 HV |
1062 | for (i = 1; i < las->num_log_addrs; i++) |
1063 | las->log_addr[i] = CEC_LOG_ADDR_INVALID; | |
9881fe0c HV |
1064 | } |
1065 | adap->is_configured = true; | |
1066 | adap->is_configuring = false; | |
1067 | cec_post_state_event(adap); | |
1068 | mutex_unlock(&adap->lock); | |
1069 | ||
1070 | for (i = 0; i < las->num_log_addrs; i++) { | |
1071 | if (las->log_addr[i] == CEC_LOG_ADDR_INVALID) | |
1072 | continue; | |
1073 | ||
1074 | /* | |
1075 | * Report Features must come first according | |
1076 | * to CEC 2.0 | |
1077 | */ | |
1078 | if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED) | |
1079 | cec_report_features(adap, i); | |
1080 | cec_report_phys_addr(adap, i); | |
1081 | } | |
0c1d61b0 HV |
1082 | for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++) |
1083 | las->log_addr[i] = CEC_LOG_ADDR_INVALID; | |
9881fe0c HV |
1084 | mutex_lock(&adap->lock); |
1085 | adap->kthread_config = NULL; | |
1086 | mutex_unlock(&adap->lock); | |
1087 | complete(&adap->config_completion); | |
1088 | return 0; | |
1089 | ||
1090 | unconfigure: | |
1091 | for (i = 0; i < las->num_log_addrs; i++) | |
1092 | las->log_addr[i] = CEC_LOG_ADDR_INVALID; | |
1093 | cec_adap_unconfigure(adap); | |
1094 | adap->kthread_config = NULL; | |
1095 | mutex_unlock(&adap->lock); | |
1096 | complete(&adap->config_completion); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the | |
1102 | * logical addresses. | |
1103 | * | |
1104 | * This function is called with adap->lock held. | |
1105 | */ | |
1106 | static void cec_claim_log_addrs(struct cec_adapter *adap, bool block) | |
1107 | { | |
1108 | if (WARN_ON(adap->is_configuring || adap->is_configured)) | |
1109 | return; | |
1110 | ||
1111 | init_completion(&adap->config_completion); | |
1112 | ||
1113 | /* Ready to kick off the thread */ | |
1114 | adap->is_configuring = true; | |
1115 | adap->kthread_config = kthread_run(cec_config_thread_func, adap, | |
1116 | "ceccfg-%s", adap->name); | |
1117 | if (IS_ERR(adap->kthread_config)) { | |
1118 | adap->kthread_config = NULL; | |
1119 | } else if (block) { | |
1120 | mutex_unlock(&adap->lock); | |
1121 | wait_for_completion(&adap->config_completion); | |
1122 | mutex_lock(&adap->lock); | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | /* Set a new physical address and send an event notifying userspace of this. | |
1127 | * | |
1128 | * This function is called with adap->lock held. | |
1129 | */ | |
1130 | void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block) | |
1131 | { | |
c000e5da | 1132 | if (phys_addr == adap->phys_addr || adap->devnode.unregistered) |
9881fe0c HV |
1133 | return; |
1134 | ||
1135 | if (phys_addr == CEC_PHYS_ADDR_INVALID || | |
1136 | adap->phys_addr != CEC_PHYS_ADDR_INVALID) { | |
1137 | adap->phys_addr = CEC_PHYS_ADDR_INVALID; | |
1138 | cec_post_state_event(adap); | |
1139 | cec_adap_unconfigure(adap); | |
1140 | /* Disabling monitor all mode should always succeed */ | |
1141 | if (adap->monitor_all_cnt) | |
1142 | WARN_ON(call_op(adap, adap_monitor_all_enable, false)); | |
1143 | WARN_ON(adap->ops->adap_enable(adap, false)); | |
1144 | if (phys_addr == CEC_PHYS_ADDR_INVALID) | |
1145 | return; | |
1146 | } | |
1147 | ||
1148 | if (adap->ops->adap_enable(adap, true)) | |
1149 | return; | |
1150 | ||
1151 | if (adap->monitor_all_cnt && | |
1152 | call_op(adap, adap_monitor_all_enable, true)) { | |
1153 | WARN_ON(adap->ops->adap_enable(adap, false)); | |
1154 | return; | |
1155 | } | |
1156 | adap->phys_addr = phys_addr; | |
1157 | cec_post_state_event(adap); | |
1158 | if (adap->log_addrs.num_log_addrs) | |
1159 | cec_claim_log_addrs(adap, block); | |
1160 | } | |
1161 | ||
1162 | void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block) | |
1163 | { | |
1164 | if (IS_ERR_OR_NULL(adap)) | |
1165 | return; | |
1166 | ||
9881fe0c HV |
1167 | mutex_lock(&adap->lock); |
1168 | __cec_s_phys_addr(adap, phys_addr, block); | |
1169 | mutex_unlock(&adap->lock); | |
1170 | } | |
1171 | EXPORT_SYMBOL_GPL(cec_s_phys_addr); | |
1172 | ||
1173 | /* | |
1174 | * Called from either the ioctl or a driver to set the logical addresses. | |
1175 | * | |
1176 | * This function is called with adap->lock held. | |
1177 | */ | |
1178 | int __cec_s_log_addrs(struct cec_adapter *adap, | |
1179 | struct cec_log_addrs *log_addrs, bool block) | |
1180 | { | |
1181 | u16 type_mask = 0; | |
1182 | int i; | |
1183 | ||
c000e5da HV |
1184 | if (adap->devnode.unregistered) |
1185 | return -ENODEV; | |
1186 | ||
9881fe0c HV |
1187 | if (!log_addrs || log_addrs->num_log_addrs == 0) { |
1188 | adap->log_addrs.num_log_addrs = 0; | |
1189 | cec_adap_unconfigure(adap); | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | /* Ensure the osd name is 0-terminated */ | |
1194 | log_addrs->osd_name[sizeof(log_addrs->osd_name) - 1] = '\0'; | |
1195 | ||
1196 | /* Sanity checks */ | |
1197 | if (log_addrs->num_log_addrs > adap->available_log_addrs) { | |
1198 | dprintk(1, "num_log_addrs > %d\n", adap->available_log_addrs); | |
1199 | return -EINVAL; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Vendor ID is a 24 bit number, so check if the value is | |
1204 | * within the correct range. | |
1205 | */ | |
1206 | if (log_addrs->vendor_id != CEC_VENDOR_ID_NONE && | |
1207 | (log_addrs->vendor_id & 0xff000000) != 0) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | if (log_addrs->cec_version != CEC_OP_CEC_VERSION_1_4 && | |
1211 | log_addrs->cec_version != CEC_OP_CEC_VERSION_2_0) | |
1212 | return -EINVAL; | |
1213 | ||
1214 | if (log_addrs->num_log_addrs > 1) | |
1215 | for (i = 0; i < log_addrs->num_log_addrs; i++) | |
1216 | if (log_addrs->log_addr_type[i] == | |
1217 | CEC_LOG_ADDR_TYPE_UNREGISTERED) { | |
1218 | dprintk(1, "num_log_addrs > 1 can't be combined with unregistered LA\n"); | |
1219 | return -EINVAL; | |
1220 | } | |
1221 | ||
9881fe0c | 1222 | for (i = 0; i < log_addrs->num_log_addrs; i++) { |
009a6208 | 1223 | const u8 feature_sz = ARRAY_SIZE(log_addrs->features[0]); |
9881fe0c HV |
1224 | u8 *features = log_addrs->features[i]; |
1225 | bool op_is_dev_features = false; | |
1226 | ||
1227 | log_addrs->log_addr[i] = CEC_LOG_ADDR_INVALID; | |
1228 | if (type_mask & (1 << log_addrs->log_addr_type[i])) { | |
1229 | dprintk(1, "duplicate logical address type\n"); | |
1230 | return -EINVAL; | |
1231 | } | |
1232 | type_mask |= 1 << log_addrs->log_addr_type[i]; | |
1233 | if ((type_mask & (1 << CEC_LOG_ADDR_TYPE_RECORD)) && | |
1234 | (type_mask & (1 << CEC_LOG_ADDR_TYPE_PLAYBACK))) { | |
1235 | /* Record already contains the playback functionality */ | |
1236 | dprintk(1, "invalid record + playback combination\n"); | |
1237 | return -EINVAL; | |
1238 | } | |
1239 | if (log_addrs->primary_device_type[i] > | |
1240 | CEC_OP_PRIM_DEVTYPE_PROCESSOR) { | |
1241 | dprintk(1, "unknown primary device type\n"); | |
1242 | return -EINVAL; | |
1243 | } | |
1244 | if (log_addrs->primary_device_type[i] == 2) { | |
1245 | dprintk(1, "invalid primary device type\n"); | |
1246 | return -EINVAL; | |
1247 | } | |
1248 | if (log_addrs->log_addr_type[i] > CEC_LOG_ADDR_TYPE_UNREGISTERED) { | |
1249 | dprintk(1, "unknown logical address type\n"); | |
1250 | return -EINVAL; | |
1251 | } | |
009a6208 | 1252 | for (i = 0; i < feature_sz; i++) { |
9881fe0c HV |
1253 | if ((features[i] & 0x80) == 0) { |
1254 | if (op_is_dev_features) | |
1255 | break; | |
1256 | op_is_dev_features = true; | |
1257 | } | |
1258 | } | |
009a6208 | 1259 | if (!op_is_dev_features || i == feature_sz) { |
9881fe0c HV |
1260 | dprintk(1, "malformed features\n"); |
1261 | return -EINVAL; | |
1262 | } | |
009a6208 | 1263 | /* Zero unused part of the feature array */ |
292eaf50 | 1264 | memset(features + i + 1, 0, feature_sz - i - 1); |
9881fe0c HV |
1265 | } |
1266 | ||
1267 | if (log_addrs->cec_version >= CEC_OP_CEC_VERSION_2_0) { | |
1268 | if (log_addrs->num_log_addrs > 2) { | |
1269 | dprintk(1, "CEC 2.0 allows no more than 2 logical addresses\n"); | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | if (log_addrs->num_log_addrs == 2) { | |
1273 | if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM) | | |
1274 | (1 << CEC_LOG_ADDR_TYPE_TV)))) { | |
1275 | dprintk(1, "Two LAs is only allowed for audiosystem and TV\n"); | |
1276 | return -EINVAL; | |
1277 | } | |
1278 | if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK) | | |
1279 | (1 << CEC_LOG_ADDR_TYPE_RECORD)))) { | |
1280 | dprintk(1, "An audiosystem/TV can only be combined with record or playback\n"); | |
1281 | return -EINVAL; | |
1282 | } | |
1283 | } | |
1284 | } | |
1285 | ||
009a6208 HV |
1286 | /* Zero unused LAs */ |
1287 | for (i = log_addrs->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++) { | |
1288 | log_addrs->primary_device_type[i] = 0; | |
1289 | log_addrs->log_addr_type[i] = 0; | |
1290 | log_addrs->all_device_types[i] = 0; | |
1291 | memset(log_addrs->features[i], 0, | |
1292 | sizeof(log_addrs->features[i])); | |
1293 | } | |
1294 | ||
9881fe0c HV |
1295 | log_addrs->log_addr_mask = adap->log_addrs.log_addr_mask; |
1296 | adap->log_addrs = *log_addrs; | |
1297 | if (adap->phys_addr != CEC_PHYS_ADDR_INVALID) | |
1298 | cec_claim_log_addrs(adap, block); | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | int cec_s_log_addrs(struct cec_adapter *adap, | |
1303 | struct cec_log_addrs *log_addrs, bool block) | |
1304 | { | |
1305 | int err; | |
1306 | ||
9881fe0c HV |
1307 | mutex_lock(&adap->lock); |
1308 | err = __cec_s_log_addrs(adap, log_addrs, block); | |
1309 | mutex_unlock(&adap->lock); | |
1310 | return err; | |
1311 | } | |
1312 | EXPORT_SYMBOL_GPL(cec_s_log_addrs); | |
1313 | ||
1314 | /* High-level core CEC message handling */ | |
1315 | ||
1316 | /* Transmit the Report Features message */ | |
1317 | static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx) | |
1318 | { | |
1319 | struct cec_msg msg = { }; | |
1320 | const struct cec_log_addrs *las = &adap->log_addrs; | |
1321 | const u8 *features = las->features[la_idx]; | |
1322 | bool op_is_dev_features = false; | |
1323 | unsigned int idx; | |
1324 | ||
1325 | /* This is 2.0 and up only */ | |
1326 | if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0) | |
1327 | return 0; | |
1328 | ||
1329 | /* Report Features */ | |
1330 | msg.msg[0] = (las->log_addr[la_idx] << 4) | 0x0f; | |
1331 | msg.len = 4; | |
1332 | msg.msg[1] = CEC_MSG_REPORT_FEATURES; | |
1333 | msg.msg[2] = adap->log_addrs.cec_version; | |
1334 | msg.msg[3] = las->all_device_types[la_idx]; | |
1335 | ||
1336 | /* Write RC Profiles first, then Device Features */ | |
1337 | for (idx = 0; idx < ARRAY_SIZE(las->features[0]); idx++) { | |
1338 | msg.msg[msg.len++] = features[idx]; | |
1339 | if ((features[idx] & CEC_OP_FEAT_EXT) == 0) { | |
1340 | if (op_is_dev_features) | |
1341 | break; | |
1342 | op_is_dev_features = true; | |
1343 | } | |
1344 | } | |
1345 | return cec_transmit_msg(adap, &msg, false); | |
1346 | } | |
1347 | ||
1348 | /* Transmit the Report Physical Address message */ | |
1349 | static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx) | |
1350 | { | |
1351 | const struct cec_log_addrs *las = &adap->log_addrs; | |
1352 | struct cec_msg msg = { }; | |
1353 | ||
1354 | /* Report Physical Address */ | |
1355 | msg.msg[0] = (las->log_addr[la_idx] << 4) | 0x0f; | |
1356 | cec_msg_report_physical_addr(&msg, adap->phys_addr, | |
1357 | las->primary_device_type[la_idx]); | |
1358 | dprintk(2, "config: la %d pa %x.%x.%x.%x\n", | |
1359 | las->log_addr[la_idx], | |
1360 | cec_phys_addr_exp(adap->phys_addr)); | |
1361 | return cec_transmit_msg(adap, &msg, false); | |
1362 | } | |
1363 | ||
1364 | /* Transmit the Feature Abort message */ | |
1365 | static int cec_feature_abort_reason(struct cec_adapter *adap, | |
1366 | struct cec_msg *msg, u8 reason) | |
1367 | { | |
1368 | struct cec_msg tx_msg = { }; | |
1369 | ||
1370 | /* | |
1371 | * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT | |
1372 | * message! | |
1373 | */ | |
1374 | if (msg->msg[1] == CEC_MSG_FEATURE_ABORT) | |
1375 | return 0; | |
1376 | cec_msg_set_reply_to(&tx_msg, msg); | |
1377 | cec_msg_feature_abort(&tx_msg, msg->msg[1], reason); | |
1378 | return cec_transmit_msg(adap, &tx_msg, false); | |
1379 | } | |
1380 | ||
1381 | static int cec_feature_abort(struct cec_adapter *adap, struct cec_msg *msg) | |
1382 | { | |
1383 | return cec_feature_abort_reason(adap, msg, | |
1384 | CEC_OP_ABORT_UNRECOGNIZED_OP); | |
1385 | } | |
1386 | ||
1387 | static int cec_feature_refused(struct cec_adapter *adap, struct cec_msg *msg) | |
1388 | { | |
1389 | return cec_feature_abort_reason(adap, msg, | |
1390 | CEC_OP_ABORT_REFUSED); | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Called when a CEC message is received. This function will do any | |
1395 | * necessary core processing. The is_reply bool is true if this message | |
1396 | * is a reply to an earlier transmit. | |
1397 | * | |
1398 | * The message is either a broadcast message or a valid directed message. | |
1399 | */ | |
1400 | static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg, | |
1401 | bool is_reply) | |
1402 | { | |
1403 | bool is_broadcast = cec_msg_is_broadcast(msg); | |
1404 | u8 dest_laddr = cec_msg_destination(msg); | |
1405 | u8 init_laddr = cec_msg_initiator(msg); | |
1406 | u8 devtype = cec_log_addr2dev(adap, dest_laddr); | |
1407 | int la_idx = cec_log_addr2idx(adap, dest_laddr); | |
9881fe0c HV |
1408 | bool from_unregistered = init_laddr == 0xf; |
1409 | struct cec_msg tx_cec_msg = { }; | |
1410 | ||
1411 | dprintk(1, "cec_receive_notify: %*ph\n", msg->len, msg->msg); | |
1412 | ||
1413 | if (adap->ops->received) { | |
1414 | /* Allow drivers to process the message first */ | |
1415 | if (adap->ops->received(adap, msg) != -ENOMSG) | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and | |
1421 | * CEC_MSG_USER_CONTROL_RELEASED messages always have to be | |
1422 | * handled by the CEC core, even if the passthrough mode is on. | |
1423 | * The others are just ignored if passthrough mode is on. | |
1424 | */ | |
1425 | switch (msg->msg[1]) { | |
1426 | case CEC_MSG_GET_CEC_VERSION: | |
1427 | case CEC_MSG_GIVE_DEVICE_VENDOR_ID: | |
1428 | case CEC_MSG_ABORT: | |
1429 | case CEC_MSG_GIVE_DEVICE_POWER_STATUS: | |
1430 | case CEC_MSG_GIVE_PHYSICAL_ADDR: | |
1431 | case CEC_MSG_GIVE_OSD_NAME: | |
1432 | case CEC_MSG_GIVE_FEATURES: | |
1433 | /* | |
1434 | * Skip processing these messages if the passthrough mode | |
1435 | * is on. | |
1436 | */ | |
1437 | if (adap->passthrough) | |
1438 | goto skip_processing; | |
1439 | /* Ignore if addressing is wrong */ | |
1440 | if (is_broadcast || from_unregistered) | |
1441 | return 0; | |
1442 | break; | |
1443 | ||
1444 | case CEC_MSG_USER_CONTROL_PRESSED: | |
1445 | case CEC_MSG_USER_CONTROL_RELEASED: | |
1446 | /* Wrong addressing mode: don't process */ | |
1447 | if (is_broadcast || from_unregistered) | |
1448 | goto skip_processing; | |
1449 | break; | |
1450 | ||
1451 | case CEC_MSG_REPORT_PHYSICAL_ADDR: | |
1452 | /* | |
1453 | * This message is always processed, regardless of the | |
1454 | * passthrough setting. | |
1455 | * | |
1456 | * Exception: don't process if wrong addressing mode. | |
1457 | */ | |
1458 | if (!is_broadcast) | |
1459 | goto skip_processing; | |
1460 | break; | |
1461 | ||
1462 | default: | |
1463 | break; | |
1464 | } | |
1465 | ||
1466 | cec_msg_set_reply_to(&tx_cec_msg, msg); | |
1467 | ||
1468 | switch (msg->msg[1]) { | |
1469 | /* The following messages are processed but still passed through */ | |
f8db65fe HV |
1470 | case CEC_MSG_REPORT_PHYSICAL_ADDR: { |
1471 | u16 pa = (msg->msg[2] << 8) | msg->msg[3]; | |
1472 | ||
1473 | if (!from_unregistered) | |
1474 | adap->phys_addrs[init_laddr] = pa; | |
1475 | dprintk(1, "Reported physical address %x.%x.%x.%x for logical address %d\n", | |
1476 | cec_phys_addr_exp(pa), init_laddr); | |
9881fe0c | 1477 | break; |
f8db65fe | 1478 | } |
9881fe0c HV |
1479 | |
1480 | case CEC_MSG_USER_CONTROL_PRESSED: | |
1481 | if (!(adap->capabilities & CEC_CAP_RC)) | |
1482 | break; | |
1483 | ||
5bb2399a | 1484 | #if IS_REACHABLE(CONFIG_RC_CORE) |
9881fe0c HV |
1485 | switch (msg->msg[2]) { |
1486 | /* | |
1487 | * Play function, this message can have variable length | |
1488 | * depending on the specific play function that is used. | |
1489 | */ | |
1490 | case 0x60: | |
1491 | if (msg->len == 2) | |
1492 | rc_keydown(adap->rc, RC_TYPE_CEC, | |
1493 | msg->msg[2], 0); | |
1494 | else | |
1495 | rc_keydown(adap->rc, RC_TYPE_CEC, | |
1496 | msg->msg[2] << 8 | msg->msg[3], 0); | |
1497 | break; | |
1498 | /* | |
1499 | * Other function messages that are not handled. | |
1500 | * Currently the RC framework does not allow to supply an | |
1501 | * additional parameter to a keypress. These "keys" contain | |
1502 | * other information such as channel number, an input number | |
1503 | * etc. | |
1504 | * For the time being these messages are not processed by the | |
1505 | * framework and are simply forwarded to the user space. | |
1506 | */ | |
1507 | case 0x56: case 0x57: | |
1508 | case 0x67: case 0x68: case 0x69: case 0x6a: | |
1509 | break; | |
1510 | default: | |
1511 | rc_keydown(adap->rc, RC_TYPE_CEC, msg->msg[2], 0); | |
1512 | break; | |
1513 | } | |
1514 | #endif | |
1515 | break; | |
1516 | ||
1517 | case CEC_MSG_USER_CONTROL_RELEASED: | |
1518 | if (!(adap->capabilities & CEC_CAP_RC)) | |
1519 | break; | |
5bb2399a | 1520 | #if IS_REACHABLE(CONFIG_RC_CORE) |
9881fe0c HV |
1521 | rc_keyup(adap->rc); |
1522 | #endif | |
1523 | break; | |
1524 | ||
1525 | /* | |
1526 | * The remaining messages are only processed if the passthrough mode | |
1527 | * is off. | |
1528 | */ | |
1529 | case CEC_MSG_GET_CEC_VERSION: | |
1530 | cec_msg_cec_version(&tx_cec_msg, adap->log_addrs.cec_version); | |
1531 | return cec_transmit_msg(adap, &tx_cec_msg, false); | |
1532 | ||
1533 | case CEC_MSG_GIVE_PHYSICAL_ADDR: | |
1534 | /* Do nothing for CEC switches using addr 15 */ | |
1535 | if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH && dest_laddr == 15) | |
1536 | return 0; | |
1537 | cec_msg_report_physical_addr(&tx_cec_msg, adap->phys_addr, devtype); | |
1538 | return cec_transmit_msg(adap, &tx_cec_msg, false); | |
1539 | ||
1540 | case CEC_MSG_GIVE_DEVICE_VENDOR_ID: | |
1541 | if (adap->log_addrs.vendor_id == CEC_VENDOR_ID_NONE) | |
1542 | return cec_feature_abort(adap, msg); | |
1543 | cec_msg_device_vendor_id(&tx_cec_msg, adap->log_addrs.vendor_id); | |
1544 | return cec_transmit_msg(adap, &tx_cec_msg, false); | |
1545 | ||
1546 | case CEC_MSG_ABORT: | |
1547 | /* Do nothing for CEC switches */ | |
1548 | if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH) | |
1549 | return 0; | |
1550 | return cec_feature_refused(adap, msg); | |
1551 | ||
1552 | case CEC_MSG_GIVE_OSD_NAME: { | |
1553 | if (adap->log_addrs.osd_name[0] == 0) | |
1554 | return cec_feature_abort(adap, msg); | |
1555 | cec_msg_set_osd_name(&tx_cec_msg, adap->log_addrs.osd_name); | |
1556 | return cec_transmit_msg(adap, &tx_cec_msg, false); | |
1557 | } | |
1558 | ||
1559 | case CEC_MSG_GIVE_FEATURES: | |
1560 | if (adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0) | |
1561 | return cec_report_features(adap, la_idx); | |
1562 | return 0; | |
1563 | ||
1564 | default: | |
1565 | /* | |
1566 | * Unprocessed messages are aborted if userspace isn't doing | |
1567 | * any processing either. | |
1568 | */ | |
a179b693 | 1569 | if (!is_broadcast && !is_reply && !adap->follower_cnt && |
9881fe0c HV |
1570 | !adap->cec_follower && msg->msg[1] != CEC_MSG_FEATURE_ABORT) |
1571 | return cec_feature_abort(adap, msg); | |
1572 | break; | |
1573 | } | |
1574 | ||
1575 | skip_processing: | |
1576 | /* If this was a reply, then we're done */ | |
1577 | if (is_reply) | |
1578 | return 0; | |
1579 | ||
1580 | /* | |
1581 | * Send to the exclusive follower if there is one, otherwise send | |
1582 | * to all followers. | |
1583 | */ | |
1584 | if (adap->cec_follower) | |
1585 | cec_queue_msg_fh(adap->cec_follower, msg); | |
1586 | else | |
1587 | cec_queue_msg_followers(adap, msg); | |
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Helper functions to keep track of the 'monitor all' use count. | |
1593 | * | |
1594 | * These functions are called with adap->lock held. | |
1595 | */ | |
1596 | int cec_monitor_all_cnt_inc(struct cec_adapter *adap) | |
1597 | { | |
1598 | int ret = 0; | |
1599 | ||
1600 | if (adap->monitor_all_cnt == 0) | |
1601 | ret = call_op(adap, adap_monitor_all_enable, 1); | |
1602 | if (ret == 0) | |
1603 | adap->monitor_all_cnt++; | |
1604 | return ret; | |
1605 | } | |
1606 | ||
1607 | void cec_monitor_all_cnt_dec(struct cec_adapter *adap) | |
1608 | { | |
1609 | adap->monitor_all_cnt--; | |
1610 | if (adap->monitor_all_cnt == 0) | |
1611 | WARN_ON(call_op(adap, adap_monitor_all_enable, 0)); | |
1612 | } | |
1613 | ||
1614 | #ifdef CONFIG_MEDIA_CEC_DEBUG | |
1615 | /* | |
1616 | * Log the current state of the CEC adapter. | |
1617 | * Very useful for debugging. | |
1618 | */ | |
1619 | int cec_adap_status(struct seq_file *file, void *priv) | |
1620 | { | |
1621 | struct cec_adapter *adap = dev_get_drvdata(file->private); | |
1622 | struct cec_data *data; | |
1623 | ||
1624 | mutex_lock(&adap->lock); | |
1625 | seq_printf(file, "configured: %d\n", adap->is_configured); | |
1626 | seq_printf(file, "configuring: %d\n", adap->is_configuring); | |
1627 | seq_printf(file, "phys_addr: %x.%x.%x.%x\n", | |
1628 | cec_phys_addr_exp(adap->phys_addr)); | |
1629 | seq_printf(file, "number of LAs: %d\n", adap->log_addrs.num_log_addrs); | |
1630 | seq_printf(file, "LA mask: 0x%04x\n", adap->log_addrs.log_addr_mask); | |
1631 | if (adap->cec_follower) | |
1632 | seq_printf(file, "has CEC follower%s\n", | |
1633 | adap->passthrough ? " (in passthrough mode)" : ""); | |
1634 | if (adap->cec_initiator) | |
1635 | seq_puts(file, "has CEC initiator\n"); | |
1636 | if (adap->monitor_all_cnt) | |
1637 | seq_printf(file, "file handles in Monitor All mode: %u\n", | |
1638 | adap->monitor_all_cnt); | |
1639 | data = adap->transmitting; | |
1640 | if (data) | |
11065f85 HV |
1641 | seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n", |
1642 | data->msg.len, data->msg.msg, data->msg.reply, | |
1643 | data->msg.timeout); | |
1644 | seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz); | |
9881fe0c | 1645 | list_for_each_entry(data, &adap->transmit_queue, list) { |
11065f85 HV |
1646 | seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n", |
1647 | data->msg.len, data->msg.msg, data->msg.reply, | |
1648 | data->msg.timeout); | |
9881fe0c HV |
1649 | } |
1650 | list_for_each_entry(data, &adap->wait_queue, list) { | |
11065f85 HV |
1651 | seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n", |
1652 | data->msg.len, data->msg.msg, data->msg.reply, | |
1653 | data->msg.timeout); | |
9881fe0c HV |
1654 | } |
1655 | ||
1656 | call_void_op(adap, adap_status, file); | |
1657 | mutex_unlock(&adap->lock); | |
1658 | return 0; | |
1659 | } | |
1660 | #endif |