2 * cec-adap.c - HDMI Consumer Electronics Control framework - CEC adapter
4 * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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.
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
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>
28 #include <linux/string.h>
29 #include <linux/types.h>
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);
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
43 * This is a sign that something it really wrong and a warning
46 #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
48 #define call_op(adap, op, arg...) \
49 (adap->ops->op ? adap->ops->op(adap, ## arg) : 0)
51 #define call_void_op(adap, op, arg...) \
54 adap->ops->op(adap, ## arg); \
57 static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr)
61 for (i = 0; i < adap->log_addrs.num_log_addrs; i++)
62 if (adap->log_addrs.log_addr[i] == log_addr)
67 static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr)
69 int i = cec_log_addr2idx(adap, log_addr);
71 return adap->log_addrs.primary_device_type[i < 0 ? 0 : i];
75 * Queue a new event for this filehandle. If ts == 0, then set it
76 * to the current time.
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
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.
87 void cec_queue_event_fh(struct cec_fh *fh,
88 const struct cec_event *new_ev, u64 ts)
90 struct cec_event *ev = &fh->events[new_ev->event - 1];
95 mutex_lock(&fh->lock);
96 if (new_ev->event == CEC_EVENT_LOST_MSGS &&
97 fh->pending_events & (1 << new_ev->event)) {
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.
103 ev->lost_msgs.lost_msgs += new_ev->lost_msgs.lost_msgs;
108 * Intermediate states are not interesting, so just
109 * overwrite any older event.
113 fh->pending_events |= 1 << new_ev->event;
116 mutex_unlock(&fh->lock);
117 wake_up_interruptible(&fh->wait);
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)
124 u64 ts = ktime_get_ns();
127 mutex_lock(&adap->devnode.lock);
128 list_for_each_entry(fh, &adap->devnode.fhs, list)
129 cec_queue_event_fh(fh, ev, ts);
130 mutex_unlock(&adap->devnode.lock);
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.
137 static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
139 static const struct cec_event ev_lost_msg = {
141 .event = CEC_EVENT_LOST_MSGS,
144 .lost_msgs.lost_msgs = 1,
147 struct cec_msg_entry *entry;
149 mutex_lock(&fh->lock);
150 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
155 /* Add new msg at the end of the queue */
156 list_add_tail(&entry->list, &fh->msgs);
159 * if the queue now has more than CEC_MAX_MSG_RX_QUEUE_SZ
160 * messages, drop the oldest one and send a lost message event.
162 if (fh->queued_msgs == CEC_MAX_MSG_RX_QUEUE_SZ) {
163 list_del(&entry->list);
167 mutex_unlock(&fh->lock);
168 wake_up_interruptible(&fh->wait);
172 mutex_unlock(&fh->lock);
173 cec_queue_event_fh(fh, &ev_lost_msg, 0);
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.
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.
186 static void cec_queue_msg_monitor(struct cec_adapter *adap,
187 const struct cec_msg *msg,
191 u32 monitor_mode = valid_la ? CEC_MODE_MONITOR :
192 CEC_MODE_MONITOR_ALL;
194 mutex_lock(&adap->devnode.lock);
195 list_for_each_entry(fh, &adap->devnode.fhs, list) {
196 if (fh->mode_follower >= monitor_mode)
197 cec_queue_msg_fh(fh, msg);
199 mutex_unlock(&adap->devnode.lock);
203 * Queue the message for follower filehandles.
205 static void cec_queue_msg_followers(struct cec_adapter *adap,
206 const struct cec_msg *msg)
210 mutex_lock(&adap->devnode.lock);
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);
215 mutex_unlock(&adap->devnode.lock);
218 /* Notify userspace of an adapter state change. */
219 static void cec_post_state_event(struct cec_adapter *adap)
221 struct cec_event ev = {
222 .event = CEC_EVENT_STATE_CHANGE,
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);
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.
235 * This function is called with adap->lock held.
237 static void cec_data_completed(struct cec_data *data)
240 * Delete this transmit from the filehandle's xfer_list since
241 * we're done with it.
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.
248 list_del(&data->xfer_list);
250 if (data->blocking) {
252 * Someone is blocking so mark the message as completed
255 data->completed = true;
259 * No blocking, so just queue the message if needed and
263 cec_queue_msg_fh(data->fh, &data->msg);
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
273 * This function is called with adap->lock held.
275 static void cec_data_cancel(struct cec_data *data)
278 * It's either the current transmit, or it is a pending
279 * transmit. Take the appropriate action to clear it.
281 if (data->adap->transmitting == data) {
282 data->adap->transmitting = NULL;
284 list_del_init(&data->list);
285 if (!(data->msg.tx_status & CEC_TX_STATUS_OK))
286 data->adap->transmit_queue_sz--;
289 /* Mark it as an error */
290 data->msg.tx_ts = ktime_get_ns();
291 data->msg.tx_status = CEC_TX_STATUS_ERROR |
292 CEC_TX_STATUS_MAX_RETRIES;
294 data->msg.tx_error_cnt = 1;
295 /* Queue transmitted message for monitoring purposes */
296 cec_queue_msg_monitor(data->adap, &data->msg, 1);
298 cec_data_completed(data);
302 * Main CEC state machine
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().
309 * If the adapter is disabled, then remove all queued messages instead.
311 * If the current transmit times out, then cancel that transmit.
313 int cec_thread_func(void *_adap)
315 struct cec_adapter *adap = _adap;
318 unsigned int signal_free_time;
319 struct cec_data *data;
320 bool timeout = false;
323 if (adap->transmitting) {
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.
333 err = wait_event_interruptible_timeout(adap->kthread_waitq,
334 kthread_should_stop() ||
335 (!adap->is_configured && !adap->is_configuring) ||
336 (!adap->transmitting &&
337 !list_empty(&adap->transmit_queue)),
338 msecs_to_jiffies(CEC_XFER_TIMEOUT_MS));
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)));
348 mutex_lock(&adap->lock);
350 if ((!adap->is_configured && !adap->is_configuring) ||
351 kthread_should_stop()) {
353 * If the adapter is disabled, or we're asked to stop,
354 * then cancel any pending transmits.
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);
361 if (adap->transmitting)
362 cec_data_cancel(adap->transmitting);
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.
372 while (!list_empty(&adap->wait_queue)) {
373 data = list_first_entry(&adap->wait_queue,
374 struct cec_data, list);
376 if (!cancel_delayed_work(&data->work)) {
377 mutex_unlock(&adap->lock);
378 flush_scheduled_work();
379 mutex_lock(&adap->lock);
381 cec_data_cancel(data);
386 if (adap->transmitting && timeout) {
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.
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);
401 * If we are still transmitting, or there is nothing new to
402 * transmit, then just continue waiting.
404 if (adap->transmitting || list_empty(&adap->transmit_queue))
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);
411 adap->transmit_queue_sz--;
412 /* Make this the current transmitting message */
413 adap->transmitting = data;
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.
421 if (data->msg.len == 1 && adap->is_configured)
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;
435 * should be >= 7 data bit periods for sending another
436 * frame immediately after another.
438 signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER;
440 if (data->attempts == 0)
441 data->attempts = attempts;
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);
449 mutex_unlock(&adap->lock);
451 if (kthread_should_stop())
458 * Called by the CEC adapter if a transmit finished.
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)
463 struct cec_data *data;
465 u64 ts = ktime_get_ns();
467 dprintk(2, "cec_transmit_done %02x\n", status);
468 mutex_lock(&adap->lock);
469 data = adap->transmitting;
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.
476 dprintk(1, "cec_transmit_done without an ongoing transmit!\n");
482 /* Drivers must fill in the status! */
483 WARN_ON(status == 0);
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;
491 /* Mark that we're done with this transmit */
492 adap->transmitting = NULL;
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.
499 if (data->attempts > 1 &&
500 !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {
501 /* Retry this message */
503 /* Add the message in front of the transmit queue */
504 list_add(&data->list, &adap->transmit_queue);
505 adap->transmit_queue_sz++;
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;
515 /* Queue transmitted message for monitoring purposes */
516 cec_queue_msg_monitor(adap, msg, 1);
518 if ((status & CEC_TX_STATUS_OK) && adap->is_configured &&
521 * Queue the message into the wait queue if we want to wait
524 list_add_tail(&data->list, &adap->wait_queue);
525 schedule_delayed_work(&data->work,
526 msecs_to_jiffies(msg->timeout));
528 /* Otherwise we're done */
529 cec_data_completed(data);
534 * Wake up the main thread to see if another message is ready
535 * for transmitting or to retry the current message.
537 wake_up_interruptible(&adap->kthread_waitq);
539 mutex_unlock(&adap->lock);
541 EXPORT_SYMBOL_GPL(cec_transmit_done);
544 * Called when waiting for a reply times out.
546 static void cec_wait_timeout(struct work_struct *work)
548 struct cec_data *data = container_of(work, struct cec_data, work.work);
549 struct cec_adapter *adap = data->adap;
551 mutex_lock(&adap->lock);
553 * Sanity check in case the timeout and the arrival of the message
554 * happened at the same time.
556 if (list_empty(&data->list))
559 /* Mark the message as timed out */
560 list_del_init(&data->list);
561 data->msg.rx_ts = ktime_get_ns();
562 data->msg.rx_status = CEC_RX_STATUS_TIMEOUT;
563 cec_data_completed(data);
565 mutex_unlock(&adap->lock);
569 * Transmit a message. The fh argument may be NULL if the transmit is not
570 * associated with a specific filehandle.
572 * This function is called with adap->lock held.
574 int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
575 struct cec_fh *fh, bool block)
577 struct cec_data *data;
578 u8 last_initiator = 0xff;
579 unsigned int timeout;
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;
591 msg->sequence = ++adap->sequence;
593 msg->sequence = ++adap->sequence;
595 if (msg->reply && msg->timeout == 0) {
596 /* Make sure the timeout isn't 0. */
601 if (msg->len == 0 || msg->len > CEC_MAX_MSG_SIZE) {
602 dprintk(1, "cec_transmit_msg: invalid length %d\n", msg->len);
605 if (msg->timeout && msg->len == 1) {
606 dprintk(1, "cec_transmit_msg: can't reply for poll msg\n");
609 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
611 if (cec_msg_initiator(msg) != 0xf ||
612 cec_msg_destination(msg) == 0xf) {
613 dprintk(1, "cec_transmit_msg: invalid poll message\n");
616 if (cec_has_log_addr(adap, cec_msg_destination(msg))) {
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
625 msg->tx_ts = ktime_get_ns();
626 msg->tx_status = CEC_TX_STATUS_NACK |
627 CEC_TX_STATUS_MAX_RETRIES;
628 msg->tx_nack_cnt = 1;
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");
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));
643 if (!adap->is_configured && !adap->is_configuring)
646 if (adap->transmit_queue_sz >= CEC_MAX_MSG_TX_QUEUE_SZ)
649 data = kzalloc(sizeof(*data), GFP_KERNEL);
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;
659 dprintk(2, "cec_transmit_msg: %*ph (wait for 0x%02x%s)\n",
660 msg->len, msg->msg, msg->reply, !block ? ", nb" : "");
662 dprintk(2, "cec_transmit_msg: %*ph%s\n",
663 msg->len, msg->msg, !block ? " (nb)" : "");
668 data->blocking = block;
671 * Determine if this message follows a message from the same
672 * initiator. Needed to determine the free signal time later on.
675 if (!(list_empty(&adap->transmit_queue))) {
676 const struct cec_data *last;
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) {
683 cec_msg_initiator(&adap->transmitting->msg);
686 data->new_initiator = last_initiator != cec_msg_initiator(msg);
687 init_completion(&data->c);
688 INIT_DELAYED_WORK(&data->work, cec_wait_timeout);
691 list_add_tail(&data->xfer_list, &fh->xfer_list);
692 list_add_tail(&data->list, &adap->transmit_queue);
693 adap->transmit_queue_sz++;
694 if (!adap->transmitting)
695 wake_up_interruptible(&adap->kthread_waitq);
697 /* All done if we don't need to block waiting for completion */
702 * If we don't get a completion before this time something is really
703 * wrong and we time out.
705 timeout = CEC_XFER_TIMEOUT_MS;
706 /* Add the requested timeout if we have to wait for a reply as well */
708 timeout += msg->timeout;
711 * Release the lock and wait, retake the lock afterwards.
713 mutex_unlock(&adap->lock);
714 res = wait_for_completion_killable_timeout(&data->c,
715 msecs_to_jiffies(timeout));
716 mutex_lock(&adap->lock);
718 if (data->completed) {
719 /* The transmit completed (possibly with an error) */
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
730 data->blocking = false;
732 list_del(&data->xfer_list);
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;
740 msg->tx_status = CEC_TX_STATUS_MAX_RETRIES;
742 return res > 0 ? 0 : res;
745 /* Helper function to be used by drivers and this framework. */
746 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
751 mutex_lock(&adap->lock);
752 ret = cec_transmit_msg_fh(adap, msg, NULL, block);
753 mutex_unlock(&adap->lock);
756 EXPORT_SYMBOL_GPL(cec_transmit_msg);
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.
763 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
766 /* Called by the CEC adapter if a message is received */
767 void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg)
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;
775 if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE))
778 msg->rx_ts = ktime_get_ns();
779 msg->rx_status = CEC_RX_STATUS_OK;
780 msg->sequence = msg->reply = msg->timeout = 0;
784 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
786 mutex_lock(&adap->lock);
787 dprintk(2, "cec_received_msg: %*ph\n", msg->len, msg->msg);
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);
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;
798 /* The aborted command is in msg[2] */
803 * Walk over all transmitted messages that are waiting for a
806 list_for_each_entry(data, &adap->wait_queue, list) {
807 struct cec_msg *dst = &data->msg;
809 /* Does the command match? */
810 if ((abort && cmd != dst->msg[1]) ||
811 (!abort && cmd != dst->reply))
814 /* Does the addressing match? */
815 if (msg_init != cec_msg_destination(dst) &&
816 !cec_msg_is_broadcast(dst))
820 memcpy(dst->msg, msg->msg, msg->len);
822 dst->rx_ts = msg->rx_ts;
823 dst->rx_status = msg->rx_status;
825 dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT;
826 /* Remove it from the wait_queue */
827 list_del_init(&data->list);
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);
836 * Mark this as a reply, provided someone is still
837 * waiting for the answer.
841 cec_data_completed(data);
845 mutex_unlock(&adap->lock);
847 /* Pass the message on to any monitoring filehandles */
848 cec_queue_msg_monitor(adap, msg, valid_la);
850 /* We're done if it is not for us or a poll message */
851 if (!valid_la || msg->len <= 1)
854 if (adap->log_addrs.log_addr_mask == 0)
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.
862 cec_receive_notify(adap, msg, is_reply);
864 EXPORT_SYMBOL_GPL(cec_received_msg);
866 /* Logical Address Handling */
869 * Attempt to claim a specific logical address.
871 * This function is called with adap->lock held.
873 static int cec_config_log_addr(struct cec_adapter *adap,
875 unsigned int log_addr)
877 struct cec_log_addrs *las = &adap->log_addrs;
878 struct cec_msg msg = { };
881 if (cec_has_log_addr(adap, log_addr))
884 /* Send poll message */
886 msg.msg[0] = 0xf0 | log_addr;
887 err = cec_transmit_msg_fh(adap, &msg, NULL, true);
890 * While trying to poll the physical address was reset
891 * and the adapter was unconfigured, so bail out.
893 if (!adap->is_configuring)
899 if (msg.tx_status & CEC_TX_STATUS_OK)
903 * Message not acknowledged, so this logical
904 * address is free to use.
906 err = adap->ops->adap_log_addr(adap, log_addr);
910 las->log_addr[idx] = log_addr;
911 las->log_addr_mask |= 1 << log_addr;
912 adap->phys_addrs[log_addr] = adap->phys_addr;
914 dprintk(2, "claimed addr %d (%d)\n", log_addr,
915 las->primary_device_type[idx]);
920 * Unconfigure the adapter: clear all logical addresses and send
921 * the state changed event.
923 * This function is called with adap->lock held.
925 static void cec_adap_unconfigure(struct cec_adapter *adap)
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);
937 * Attempt to claim the required logical addresses.
939 static int cec_config_thread_func(void *arg)
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,
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,
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,
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,
964 static const u8 audiosystem_log_addrs[] = {
965 CEC_LOG_ADDR_AUDIOSYSTEM,
968 static const u8 specific_use_log_addrs[] = {
969 CEC_LOG_ADDR_SPECIFIC,
970 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
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,
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,
989 struct cec_adapter *adap = arg;
990 struct cec_log_addrs *las = &adap->log_addrs;
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;
999 if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED)
1002 for (i = 0; i < las->num_log_addrs; i++) {
1003 unsigned int type = las->log_addr_type[i];
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.
1012 if (adap->phys_addr && type == CEC_LOG_ADDR_TYPE_TV)
1013 type = CEC_LOG_ADDR_TYPE_SPECIFIC;
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];
1023 err = cec_config_log_addr(adap, i, last_la);
1024 if (err > 0) /* Reused last LA */
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)
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)
1040 err = cec_config_log_addr(adap, i, la_list[j]);
1041 if (err == 0) /* LA is in use */
1045 /* Done, claimed an LA */
1049 if (la_list[j] == CEC_LOG_ADDR_INVALID)
1050 dprintk(1, "could not claim LA %d\n", i);
1053 if (adap->log_addrs.log_addr_mask == 0 &&
1054 !(las->flags & CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK))
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];
1062 for (i = 1; i < las->num_log_addrs; i++)
1063 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1065 adap->is_configured = true;
1066 adap->is_configuring = false;
1067 cec_post_state_event(adap);
1068 mutex_unlock(&adap->lock);
1070 for (i = 0; i < las->num_log_addrs; i++) {
1071 if (las->log_addr[i] == CEC_LOG_ADDR_INVALID)
1075 * Report Features must come first according
1078 if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED)
1079 cec_report_features(adap, i);
1080 cec_report_phys_addr(adap, i);
1082 for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
1083 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1084 mutex_lock(&adap->lock);
1085 adap->kthread_config = NULL;
1086 mutex_unlock(&adap->lock);
1087 complete(&adap->config_completion);
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);
1101 * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the
1102 * logical addresses.
1104 * This function is called with adap->lock held.
1106 static void cec_claim_log_addrs(struct cec_adapter *adap, bool block)
1108 if (WARN_ON(adap->is_configuring || adap->is_configured))
1111 init_completion(&adap->config_completion);
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;
1120 mutex_unlock(&adap->lock);
1121 wait_for_completion(&adap->config_completion);
1122 mutex_lock(&adap->lock);
1126 /* Set a new physical address and send an event notifying userspace of this.
1128 * This function is called with adap->lock held.
1130 void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1132 if (phys_addr == adap->phys_addr || adap->devnode.unregistered)
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)
1148 if (adap->ops->adap_enable(adap, true))
1151 if (adap->monitor_all_cnt &&
1152 call_op(adap, adap_monitor_all_enable, true)) {
1153 WARN_ON(adap->ops->adap_enable(adap, false));
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);
1162 void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1164 if (IS_ERR_OR_NULL(adap))
1167 mutex_lock(&adap->lock);
1168 __cec_s_phys_addr(adap, phys_addr, block);
1169 mutex_unlock(&adap->lock);
1171 EXPORT_SYMBOL_GPL(cec_s_phys_addr);
1174 * Called from either the ioctl or a driver to set the logical addresses.
1176 * This function is called with adap->lock held.
1178 int __cec_s_log_addrs(struct cec_adapter *adap,
1179 struct cec_log_addrs *log_addrs, bool block)
1184 if (adap->devnode.unregistered)
1187 if (!log_addrs || log_addrs->num_log_addrs == 0) {
1188 adap->log_addrs.num_log_addrs = 0;
1189 cec_adap_unconfigure(adap);
1193 /* Ensure the osd name is 0-terminated */
1194 log_addrs->osd_name[sizeof(log_addrs->osd_name) - 1] = '\0';
1197 if (log_addrs->num_log_addrs > adap->available_log_addrs) {
1198 dprintk(1, "num_log_addrs > %d\n", adap->available_log_addrs);
1203 * Vendor ID is a 24 bit number, so check if the value is
1204 * within the correct range.
1206 if (log_addrs->vendor_id != CEC_VENDOR_ID_NONE &&
1207 (log_addrs->vendor_id & 0xff000000) != 0)
1210 if (log_addrs->cec_version != CEC_OP_CEC_VERSION_1_4 &&
1211 log_addrs->cec_version != CEC_OP_CEC_VERSION_2_0)
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");
1222 for (i = 0; i < log_addrs->num_log_addrs; i++) {
1223 const u8 feature_sz = ARRAY_SIZE(log_addrs->features[0]);
1224 u8 *features = log_addrs->features[i];
1225 bool op_is_dev_features = false;
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");
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");
1239 if (log_addrs->primary_device_type[i] >
1240 CEC_OP_PRIM_DEVTYPE_PROCESSOR) {
1241 dprintk(1, "unknown primary device type\n");
1244 if (log_addrs->primary_device_type[i] == 2) {
1245 dprintk(1, "invalid primary device type\n");
1248 if (log_addrs->log_addr_type[i] > CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1249 dprintk(1, "unknown logical address type\n");
1252 for (i = 0; i < feature_sz; i++) {
1253 if ((features[i] & 0x80) == 0) {
1254 if (op_is_dev_features)
1256 op_is_dev_features = true;
1259 if (!op_is_dev_features || i == feature_sz) {
1260 dprintk(1, "malformed features\n");
1263 /* Zero unused part of the feature array */
1264 memset(features + i + 1, 0, feature_sz - i - 1);
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");
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");
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");
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]));
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);
1302 int cec_s_log_addrs(struct cec_adapter *adap,
1303 struct cec_log_addrs *log_addrs, bool block)
1307 mutex_lock(&adap->lock);
1308 err = __cec_s_log_addrs(adap, log_addrs, block);
1309 mutex_unlock(&adap->lock);
1312 EXPORT_SYMBOL_GPL(cec_s_log_addrs);
1314 /* High-level core CEC message handling */
1316 /* Transmit the Report Features message */
1317 static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx)
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;
1325 /* This is 2.0 and up only */
1326 if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
1329 /* Report Features */
1330 msg.msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
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];
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)
1342 op_is_dev_features = true;
1345 return cec_transmit_msg(adap, &msg, false);
1348 /* Transmit the Report Physical Address message */
1349 static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx)
1351 const struct cec_log_addrs *las = &adap->log_addrs;
1352 struct cec_msg msg = { };
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);
1364 /* Transmit the Feature Abort message */
1365 static int cec_feature_abort_reason(struct cec_adapter *adap,
1366 struct cec_msg *msg, u8 reason)
1368 struct cec_msg tx_msg = { };
1371 * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT
1374 if (msg->msg[1] == CEC_MSG_FEATURE_ABORT)
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);
1381 static int cec_feature_abort(struct cec_adapter *adap, struct cec_msg *msg)
1383 return cec_feature_abort_reason(adap, msg,
1384 CEC_OP_ABORT_UNRECOGNIZED_OP);
1387 static int cec_feature_refused(struct cec_adapter *adap, struct cec_msg *msg)
1389 return cec_feature_abort_reason(adap, msg,
1390 CEC_OP_ABORT_REFUSED);
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.
1398 * The message is either a broadcast message or a valid directed message.
1400 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
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);
1408 bool from_unregistered = init_laddr == 0xf;
1409 struct cec_msg tx_cec_msg = { };
1411 dprintk(1, "cec_receive_notify: %*ph\n", msg->len, msg->msg);
1413 if (adap->ops->received) {
1414 /* Allow drivers to process the message first */
1415 if (adap->ops->received(adap, msg) != -ENOMSG)
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.
1425 switch (msg->msg[1]) {
1426 case CEC_MSG_GET_CEC_VERSION:
1427 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
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:
1434 * Skip processing these messages if the passthrough mode
1437 if (adap->passthrough)
1438 goto skip_processing;
1439 /* Ignore if addressing is wrong */
1440 if (is_broadcast || from_unregistered)
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;
1451 case CEC_MSG_REPORT_PHYSICAL_ADDR:
1453 * This message is always processed, regardless of the
1454 * passthrough setting.
1456 * Exception: don't process if wrong addressing mode.
1459 goto skip_processing;
1466 cec_msg_set_reply_to(&tx_cec_msg, msg);
1468 switch (msg->msg[1]) {
1469 /* The following messages are processed but still passed through */
1470 case CEC_MSG_REPORT_PHYSICAL_ADDR: {
1471 u16 pa = (msg->msg[2] << 8) | msg->msg[3];
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);
1480 case CEC_MSG_USER_CONTROL_PRESSED:
1481 if (!(adap->capabilities & CEC_CAP_RC))
1484 #if IS_REACHABLE(CONFIG_RC_CORE)
1485 switch (msg->msg[2]) {
1487 * Play function, this message can have variable length
1488 * depending on the specific play function that is used.
1492 rc_keydown(adap->rc, RC_TYPE_CEC,
1495 rc_keydown(adap->rc, RC_TYPE_CEC,
1496 msg->msg[2] << 8 | msg->msg[3], 0);
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
1504 * For the time being these messages are not processed by the
1505 * framework and are simply forwarded to the user space.
1507 case 0x56: case 0x57:
1508 case 0x67: case 0x68: case 0x69: case 0x6a:
1511 rc_keydown(adap->rc, RC_TYPE_CEC, msg->msg[2], 0);
1517 case CEC_MSG_USER_CONTROL_RELEASED:
1518 if (!(adap->capabilities & CEC_CAP_RC))
1520 #if IS_REACHABLE(CONFIG_RC_CORE)
1526 * The remaining messages are only processed if the passthrough mode
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);
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)
1537 cec_msg_report_physical_addr(&tx_cec_msg, adap->phys_addr, devtype);
1538 return cec_transmit_msg(adap, &tx_cec_msg, false);
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);
1547 /* Do nothing for CEC switches */
1548 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH)
1550 return cec_feature_refused(adap, msg);
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);
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);
1566 * Unprocessed messages are aborted if userspace isn't doing
1567 * any processing either.
1569 if (!is_broadcast && !is_reply && !adap->follower_cnt &&
1570 !adap->cec_follower && msg->msg[1] != CEC_MSG_FEATURE_ABORT)
1571 return cec_feature_abort(adap, msg);
1576 /* If this was a reply, then we're done */
1581 * Send to the exclusive follower if there is one, otherwise send
1584 if (adap->cec_follower)
1585 cec_queue_msg_fh(adap->cec_follower, msg);
1587 cec_queue_msg_followers(adap, msg);
1592 * Helper functions to keep track of the 'monitor all' use count.
1594 * These functions are called with adap->lock held.
1596 int cec_monitor_all_cnt_inc(struct cec_adapter *adap)
1600 if (adap->monitor_all_cnt == 0)
1601 ret = call_op(adap, adap_monitor_all_enable, 1);
1603 adap->monitor_all_cnt++;
1607 void cec_monitor_all_cnt_dec(struct cec_adapter *adap)
1609 adap->monitor_all_cnt--;
1610 if (adap->monitor_all_cnt == 0)
1611 WARN_ON(call_op(adap, adap_monitor_all_enable, 0));
1614 #ifdef CONFIG_MEDIA_CEC_DEBUG
1616 * Log the current state of the CEC adapter.
1617 * Very useful for debugging.
1619 int cec_adap_status(struct seq_file *file, void *priv)
1621 struct cec_adapter *adap = dev_get_drvdata(file->private);
1622 struct cec_data *data;
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;
1641 seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
1642 data->msg.len, data->msg.msg, data->msg.reply,
1644 seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz);
1645 list_for_each_entry(data, &adap->transmit_queue, list) {
1646 seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
1647 data->msg.len, data->msg.msg, data->msg.reply,
1650 list_for_each_entry(data, &adap->wait_queue, list) {
1651 seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
1652 data->msg.len, data->msg.msg, data->msg.reply,
1656 call_void_op(adap, adap_status, file);
1657 mutex_unlock(&adap->lock);