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>
31 #include <drm/drm_edid.h>
35 static void cec_fill_msg_report_features(struct cec_adapter *adap,
40 * 400 ms is the time it takes for one 16 byte message to be
41 * transferred and 5 is the maximum number of retries. Add
42 * another 100 ms as a margin. So if the transmit doesn't
43 * finish before that time something is really wrong and we
46 * This is a sign that something it really wrong and a warning
49 #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
51 #define call_op(adap, op, arg...) \
52 (adap->ops->op ? adap->ops->op(adap, ## arg) : 0)
54 #define call_void_op(adap, op, arg...) \
57 adap->ops->op(adap, ## arg); \
60 static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr)
64 for (i = 0; i < adap->log_addrs.num_log_addrs; i++)
65 if (adap->log_addrs.log_addr[i] == log_addr)
70 static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr)
72 int i = cec_log_addr2idx(adap, log_addr);
74 return adap->log_addrs.primary_device_type[i < 0 ? 0 : i];
78 * Queue a new event for this filehandle. If ts == 0, then set it
79 * to the current time.
81 * We keep a queue of at most max_event events where max_event differs
82 * per event. If the queue becomes full, then drop the oldest event and
83 * keep track of how many events we've dropped.
85 void cec_queue_event_fh(struct cec_fh *fh,
86 const struct cec_event *new_ev, u64 ts)
88 static const u8 max_events[CEC_NUM_EVENTS] = {
91 struct cec_event_entry *entry;
92 unsigned int ev_idx = new_ev->event - 1;
94 if (WARN_ON(ev_idx >= ARRAY_SIZE(fh->events)))
100 mutex_lock(&fh->lock);
101 if (ev_idx < CEC_NUM_CORE_EVENTS)
102 entry = &fh->core_events[ev_idx];
104 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
106 if (new_ev->event == CEC_EVENT_LOST_MSGS &&
107 fh->queued_events[ev_idx]) {
108 entry->ev.lost_msgs.lost_msgs +=
109 new_ev->lost_msgs.lost_msgs;
115 if (fh->queued_events[ev_idx] < max_events[ev_idx]) {
116 /* Add new msg at the end of the queue */
117 list_add_tail(&entry->list, &fh->events[ev_idx]);
118 fh->queued_events[ev_idx]++;
119 fh->total_queued_events++;
123 if (ev_idx >= CEC_NUM_CORE_EVENTS) {
124 list_add_tail(&entry->list, &fh->events[ev_idx]);
125 /* drop the oldest event */
126 entry = list_first_entry(&fh->events[ev_idx],
127 struct cec_event_entry, list);
128 list_del(&entry->list);
132 /* Mark that events were lost */
133 entry = list_first_entry_or_null(&fh->events[ev_idx],
134 struct cec_event_entry, list);
136 entry->ev.flags |= CEC_EVENT_FL_DROPPED_EVENTS;
139 mutex_unlock(&fh->lock);
140 wake_up_interruptible(&fh->wait);
143 /* Queue a new event for all open filehandles. */
144 static void cec_queue_event(struct cec_adapter *adap,
145 const struct cec_event *ev)
147 u64 ts = ktime_get_ns();
150 mutex_lock(&adap->devnode.lock);
151 list_for_each_entry(fh, &adap->devnode.fhs, list)
152 cec_queue_event_fh(fh, ev, ts);
153 mutex_unlock(&adap->devnode.lock);
156 /* Notify userspace that the CEC pin changed state at the given time. */
157 void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
159 struct cec_event ev = {
160 .event = is_high ? CEC_EVENT_PIN_CEC_HIGH :
161 CEC_EVENT_PIN_CEC_LOW,
165 mutex_lock(&adap->devnode.lock);
166 list_for_each_entry(fh, &adap->devnode.fhs, list)
167 if (fh->mode_follower == CEC_MODE_MONITOR_PIN)
168 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
169 mutex_unlock(&adap->devnode.lock);
171 EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event);
174 * Queue a new message for this filehandle.
176 * We keep a queue of at most CEC_MAX_MSG_RX_QUEUE_SZ messages. If the
177 * queue becomes full, then drop the oldest message and keep track
178 * of how many messages we've dropped.
180 static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
182 static const struct cec_event ev_lost_msgs = {
183 .event = CEC_EVENT_LOST_MSGS,
189 struct cec_msg_entry *entry;
191 mutex_lock(&fh->lock);
192 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
195 /* Add new msg at the end of the queue */
196 list_add_tail(&entry->list, &fh->msgs);
198 if (fh->queued_msgs < CEC_MAX_MSG_RX_QUEUE_SZ) {
199 /* All is fine if there is enough room */
201 mutex_unlock(&fh->lock);
202 wake_up_interruptible(&fh->wait);
207 * if the message queue is full, then drop the oldest one and
208 * send a lost message event.
210 entry = list_first_entry(&fh->msgs, struct cec_msg_entry, list);
211 list_del(&entry->list);
214 mutex_unlock(&fh->lock);
217 * We lost a message, either because kmalloc failed or the queue
220 cec_queue_event_fh(fh, &ev_lost_msgs, ktime_get_ns());
224 * Queue the message for those filehandles that are in monitor mode.
225 * If valid_la is true (this message is for us or was sent by us),
226 * then pass it on to any monitoring filehandle. If this message
227 * isn't for us or from us, then only give it to filehandles that
228 * are in MONITOR_ALL mode.
230 * This can only happen if the CEC_CAP_MONITOR_ALL capability is
231 * set and the CEC adapter was placed in 'monitor all' mode.
233 static void cec_queue_msg_monitor(struct cec_adapter *adap,
234 const struct cec_msg *msg,
238 u32 monitor_mode = valid_la ? CEC_MODE_MONITOR :
239 CEC_MODE_MONITOR_ALL;
241 mutex_lock(&adap->devnode.lock);
242 list_for_each_entry(fh, &adap->devnode.fhs, list) {
243 if (fh->mode_follower >= monitor_mode)
244 cec_queue_msg_fh(fh, msg);
246 mutex_unlock(&adap->devnode.lock);
250 * Queue the message for follower filehandles.
252 static void cec_queue_msg_followers(struct cec_adapter *adap,
253 const struct cec_msg *msg)
257 mutex_lock(&adap->devnode.lock);
258 list_for_each_entry(fh, &adap->devnode.fhs, list) {
259 if (fh->mode_follower == CEC_MODE_FOLLOWER)
260 cec_queue_msg_fh(fh, msg);
262 mutex_unlock(&adap->devnode.lock);
265 /* Notify userspace of an adapter state change. */
266 static void cec_post_state_event(struct cec_adapter *adap)
268 struct cec_event ev = {
269 .event = CEC_EVENT_STATE_CHANGE,
272 ev.state_change.phys_addr = adap->phys_addr;
273 ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
274 cec_queue_event(adap, &ev);
278 * A CEC transmit (and a possible wait for reply) completed.
279 * If this was in blocking mode, then complete it, otherwise
280 * queue the message for userspace to dequeue later.
282 * This function is called with adap->lock held.
284 static void cec_data_completed(struct cec_data *data)
287 * Delete this transmit from the filehandle's xfer_list since
288 * we're done with it.
290 * Note that if the filehandle is closed before this transmit
291 * finished, then the release() function will set data->fh to NULL.
292 * Without that we would be referring to a closed filehandle.
295 list_del(&data->xfer_list);
297 if (data->blocking) {
299 * Someone is blocking so mark the message as completed
302 data->completed = true;
306 * No blocking, so just queue the message if needed and
310 cec_queue_msg_fh(data->fh, &data->msg);
316 * A pending CEC transmit needs to be cancelled, either because the CEC
317 * adapter is disabled or the transmit takes an impossibly long time to
320 * This function is called with adap->lock held.
322 static void cec_data_cancel(struct cec_data *data)
325 * It's either the current transmit, or it is a pending
326 * transmit. Take the appropriate action to clear it.
328 if (data->adap->transmitting == data) {
329 data->adap->transmitting = NULL;
331 list_del_init(&data->list);
332 if (!(data->msg.tx_status & CEC_TX_STATUS_OK))
333 if (!WARN_ON(!data->adap->transmit_queue_sz))
334 data->adap->transmit_queue_sz--;
337 /* Mark it as an error */
338 data->msg.tx_ts = ktime_get_ns();
339 data->msg.tx_status |= CEC_TX_STATUS_ERROR |
340 CEC_TX_STATUS_MAX_RETRIES;
341 data->msg.tx_error_cnt++;
343 /* Queue transmitted message for monitoring purposes */
344 cec_queue_msg_monitor(data->adap, &data->msg, 1);
346 cec_data_completed(data);
350 * Flush all pending transmits and cancel any pending timeout work.
352 * This function is called with adap->lock held.
354 static void cec_flush(struct cec_adapter *adap)
356 struct cec_data *data, *n;
359 * If the adapter is disabled, or we're asked to stop,
360 * then cancel any pending transmits.
362 while (!list_empty(&adap->transmit_queue)) {
363 data = list_first_entry(&adap->transmit_queue,
364 struct cec_data, list);
365 cec_data_cancel(data);
367 if (adap->transmitting)
368 cec_data_cancel(adap->transmitting);
370 /* Cancel the pending timeout work. */
371 list_for_each_entry_safe(data, n, &adap->wait_queue, list) {
372 if (cancel_delayed_work(&data->work))
373 cec_data_cancel(data);
375 * If cancel_delayed_work returned false, then
376 * the cec_wait_timeout function is running,
377 * which will call cec_data_completed. So no
378 * need to do anything special in that case.
382 * If something went wrong and this counter isn't what it should
383 * be, then this will reset it back to 0. Warn if it is not 0,
384 * since it indicates a bug, either in this framework or in a
387 if (WARN_ON(adap->transmit_queue_sz))
388 adap->transmit_queue_sz = 0;
392 * Main CEC state machine
394 * Wait until the thread should be stopped, or we are not transmitting and
395 * a new transmit message is queued up, in which case we start transmitting
396 * that message. When the adapter finished transmitting the message it will
397 * call cec_transmit_done().
399 * If the adapter is disabled, then remove all queued messages instead.
401 * If the current transmit times out, then cancel that transmit.
403 int cec_thread_func(void *_adap)
405 struct cec_adapter *adap = _adap;
408 unsigned int signal_free_time;
409 struct cec_data *data;
410 bool timeout = false;
413 if (adap->transmitting) {
417 * We are transmitting a message, so add a timeout
418 * to prevent the state machine to get stuck waiting
419 * for this message to finalize and add a check to
420 * see if the adapter is disabled in which case the
421 * transmit should be canceled.
423 err = wait_event_interruptible_timeout(adap->kthread_waitq,
425 (!adap->is_configured && !adap->is_configuring)) ||
426 kthread_should_stop() ||
427 (!adap->transmitting &&
428 !list_empty(&adap->transmit_queue)),
429 msecs_to_jiffies(CEC_XFER_TIMEOUT_MS));
432 /* Otherwise we just wait for something to happen. */
433 wait_event_interruptible(adap->kthread_waitq,
434 kthread_should_stop() ||
435 (!adap->transmitting &&
436 !list_empty(&adap->transmit_queue)));
439 mutex_lock(&adap->lock);
441 if ((adap->needs_hpd &&
442 (!adap->is_configured && !adap->is_configuring)) ||
443 kthread_should_stop()) {
448 if (adap->transmitting && timeout) {
450 * If we timeout, then log that. Normally this does
451 * not happen and it is an indication of a faulty CEC
452 * adapter driver, or the CEC bus is in some weird
453 * state. On rare occasions it can happen if there is
454 * so much traffic on the bus that the adapter was
455 * unable to transmit for CEC_XFER_TIMEOUT_MS (2.1s).
457 dprintk(1, "%s: message %*ph timed out\n", __func__,
458 adap->transmitting->msg.len,
459 adap->transmitting->msg.msg);
461 /* Just give up on this. */
462 cec_data_cancel(adap->transmitting);
467 * If we are still transmitting, or there is nothing new to
468 * transmit, then just continue waiting.
470 if (adap->transmitting || list_empty(&adap->transmit_queue))
473 /* Get a new message to transmit */
474 data = list_first_entry(&adap->transmit_queue,
475 struct cec_data, list);
476 list_del_init(&data->list);
477 if (!WARN_ON(!data->adap->transmit_queue_sz))
478 adap->transmit_queue_sz--;
480 /* Make this the current transmitting message */
481 adap->transmitting = data;
484 * Suggested number of attempts as per the CEC 2.0 spec:
485 * 4 attempts is the default, except for 'secondary poll
486 * messages', i.e. poll messages not sent during the adapter
487 * configuration phase when it allocates logical addresses.
489 if (data->msg.len == 1 && adap->is_configured)
494 /* Set the suggested signal free time */
495 if (data->attempts) {
496 /* should be >= 3 data bit periods for a retry */
497 signal_free_time = CEC_SIGNAL_FREE_TIME_RETRY;
498 } else if (data->new_initiator) {
499 /* should be >= 5 data bit periods for new initiator */
500 signal_free_time = CEC_SIGNAL_FREE_TIME_NEW_INITIATOR;
503 * should be >= 7 data bit periods for sending another
504 * frame immediately after another.
506 signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER;
508 if (data->attempts == 0)
509 data->attempts = attempts;
511 /* Tell the adapter to transmit, cancel on error */
512 if (adap->ops->adap_transmit(adap, data->attempts,
513 signal_free_time, &data->msg))
514 cec_data_cancel(data);
517 mutex_unlock(&adap->lock);
519 if (kthread_should_stop())
526 * Called by the CEC adapter if a transmit finished.
528 void cec_transmit_done_ts(struct cec_adapter *adap, u8 status,
529 u8 arb_lost_cnt, u8 nack_cnt, u8 low_drive_cnt,
530 u8 error_cnt, ktime_t ts)
532 struct cec_data *data;
534 unsigned int attempts_made = arb_lost_cnt + nack_cnt +
535 low_drive_cnt + error_cnt;
537 dprintk(2, "%s: status %02x\n", __func__, status);
538 if (attempts_made < 1)
541 mutex_lock(&adap->lock);
542 data = adap->transmitting;
545 * This can happen if a transmit was issued and the cable is
546 * unplugged while the transmit is ongoing. Ignore this
547 * transmit in that case.
549 dprintk(1, "%s was called without an ongoing transmit!\n",
556 /* Drivers must fill in the status! */
557 WARN_ON(status == 0);
558 msg->tx_ts = ktime_to_ns(ts);
559 msg->tx_status |= status;
560 msg->tx_arb_lost_cnt += arb_lost_cnt;
561 msg->tx_nack_cnt += nack_cnt;
562 msg->tx_low_drive_cnt += low_drive_cnt;
563 msg->tx_error_cnt += error_cnt;
565 /* Mark that we're done with this transmit */
566 adap->transmitting = NULL;
569 * If there are still retry attempts left and there was an error and
570 * the hardware didn't signal that it retried itself (by setting
571 * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves.
573 if (data->attempts > attempts_made &&
574 !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {
575 /* Retry this message */
576 data->attempts -= attempts_made;
578 dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
579 msg->len, msg->msg, data->attempts, msg->reply);
581 dprintk(2, "retransmit: %*ph (attempts: %d)\n",
582 msg->len, msg->msg, data->attempts);
583 /* Add the message in front of the transmit queue */
584 list_add(&data->list, &adap->transmit_queue);
585 adap->transmit_queue_sz++;
591 /* Always set CEC_TX_STATUS_MAX_RETRIES on error */
592 if (!(status & CEC_TX_STATUS_OK))
593 msg->tx_status |= CEC_TX_STATUS_MAX_RETRIES;
595 /* Queue transmitted message for monitoring purposes */
596 cec_queue_msg_monitor(adap, msg, 1);
598 if ((status & CEC_TX_STATUS_OK) && adap->is_configured &&
601 * Queue the message into the wait queue if we want to wait
604 list_add_tail(&data->list, &adap->wait_queue);
605 schedule_delayed_work(&data->work,
606 msecs_to_jiffies(msg->timeout));
608 /* Otherwise we're done */
609 cec_data_completed(data);
614 * Wake up the main thread to see if another message is ready
615 * for transmitting or to retry the current message.
617 wake_up_interruptible(&adap->kthread_waitq);
619 mutex_unlock(&adap->lock);
621 EXPORT_SYMBOL_GPL(cec_transmit_done_ts);
623 void cec_transmit_attempt_done_ts(struct cec_adapter *adap,
624 u8 status, ktime_t ts)
626 switch (status & ~CEC_TX_STATUS_MAX_RETRIES) {
627 case CEC_TX_STATUS_OK:
628 cec_transmit_done_ts(adap, status, 0, 0, 0, 0, ts);
630 case CEC_TX_STATUS_ARB_LOST:
631 cec_transmit_done_ts(adap, status, 1, 0, 0, 0, ts);
633 case CEC_TX_STATUS_NACK:
634 cec_transmit_done_ts(adap, status, 0, 1, 0, 0, ts);
636 case CEC_TX_STATUS_LOW_DRIVE:
637 cec_transmit_done_ts(adap, status, 0, 0, 1, 0, ts);
639 case CEC_TX_STATUS_ERROR:
640 cec_transmit_done_ts(adap, status, 0, 0, 0, 1, ts);
643 /* Should never happen */
644 WARN(1, "cec-%s: invalid status 0x%02x\n", adap->name, status);
648 EXPORT_SYMBOL_GPL(cec_transmit_attempt_done_ts);
651 * Called when waiting for a reply times out.
653 static void cec_wait_timeout(struct work_struct *work)
655 struct cec_data *data = container_of(work, struct cec_data, work.work);
656 struct cec_adapter *adap = data->adap;
658 mutex_lock(&adap->lock);
660 * Sanity check in case the timeout and the arrival of the message
661 * happened at the same time.
663 if (list_empty(&data->list))
666 /* Mark the message as timed out */
667 list_del_init(&data->list);
668 data->msg.rx_ts = ktime_get_ns();
669 data->msg.rx_status = CEC_RX_STATUS_TIMEOUT;
670 cec_data_completed(data);
672 mutex_unlock(&adap->lock);
676 * Transmit a message. The fh argument may be NULL if the transmit is not
677 * associated with a specific filehandle.
679 * This function is called with adap->lock held.
681 int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
682 struct cec_fh *fh, bool block)
684 struct cec_data *data;
685 u8 last_initiator = 0xff;
686 unsigned int timeout;
693 msg->tx_arb_lost_cnt = 0;
694 msg->tx_nack_cnt = 0;
695 msg->tx_low_drive_cnt = 0;
696 msg->tx_error_cnt = 0;
699 if (msg->reply && msg->timeout == 0) {
700 /* Make sure the timeout isn't 0. */
704 msg->flags &= CEC_MSG_FL_REPLY_TO_FOLLOWERS;
709 if (msg->len == 0 || msg->len > CEC_MAX_MSG_SIZE) {
710 dprintk(1, "%s: invalid length %d\n", __func__, msg->len);
713 if (msg->timeout && msg->len == 1) {
714 dprintk(1, "%s: can't reply for poll msg\n", __func__);
717 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
719 if (cec_msg_destination(msg) == 0xf) {
720 dprintk(1, "%s: invalid poll message\n", __func__);
723 if (cec_has_log_addr(adap, cec_msg_destination(msg))) {
725 * If the destination is a logical address our adapter
726 * has already claimed, then just NACK this.
727 * It depends on the hardware what it will do with a
728 * POLL to itself (some OK this), so it is just as
729 * easy to handle it here so the behavior will be
732 msg->tx_ts = ktime_get_ns();
733 msg->tx_status = CEC_TX_STATUS_NACK |
734 CEC_TX_STATUS_MAX_RETRIES;
735 msg->tx_nack_cnt = 1;
736 msg->sequence = ++adap->sequence;
738 msg->sequence = ++adap->sequence;
742 if (msg->len > 1 && !cec_msg_is_broadcast(msg) &&
743 cec_has_log_addr(adap, cec_msg_destination(msg))) {
744 dprintk(1, "%s: destination is the adapter itself\n", __func__);
747 if (msg->len > 1 && adap->is_configured &&
748 !cec_has_log_addr(adap, cec_msg_initiator(msg))) {
749 dprintk(1, "%s: initiator has unknown logical address %d\n",
750 __func__, cec_msg_initiator(msg));
753 if (!adap->is_configured && !adap->is_configuring) {
754 if (adap->needs_hpd || msg->msg[0] != 0xf0) {
755 dprintk(1, "%s: adapter is unconfigured\n", __func__);
759 dprintk(1, "%s: invalid msg->reply\n", __func__);
764 if (adap->transmit_queue_sz >= CEC_MAX_MSG_TX_QUEUE_SZ) {
765 dprintk(1, "%s: transmit queue full\n", __func__);
769 data = kzalloc(sizeof(*data), GFP_KERNEL);
773 msg->sequence = ++adap->sequence;
775 msg->sequence = ++adap->sequence;
777 if (msg->len > 1 && msg->msg[1] == CEC_MSG_CDC_MESSAGE) {
778 msg->msg[2] = adap->phys_addr >> 8;
779 msg->msg[3] = adap->phys_addr & 0xff;
783 dprintk(2, "%s: %*ph (wait for 0x%02x%s)\n",
784 __func__, msg->len, msg->msg, msg->reply,
785 !block ? ", nb" : "");
787 dprintk(2, "%s: %*ph%s\n",
788 __func__, msg->len, msg->msg, !block ? " (nb)" : "");
793 data->blocking = block;
796 * Determine if this message follows a message from the same
797 * initiator. Needed to determine the free signal time later on.
800 if (!(list_empty(&adap->transmit_queue))) {
801 const struct cec_data *last;
803 last = list_last_entry(&adap->transmit_queue,
804 const struct cec_data, list);
805 last_initiator = cec_msg_initiator(&last->msg);
806 } else if (adap->transmitting) {
808 cec_msg_initiator(&adap->transmitting->msg);
811 data->new_initiator = last_initiator != cec_msg_initiator(msg);
812 init_completion(&data->c);
813 INIT_DELAYED_WORK(&data->work, cec_wait_timeout);
816 list_add_tail(&data->xfer_list, &fh->xfer_list);
818 list_add_tail(&data->list, &adap->transmit_queue);
819 adap->transmit_queue_sz++;
820 if (!adap->transmitting)
821 wake_up_interruptible(&adap->kthread_waitq);
823 /* All done if we don't need to block waiting for completion */
828 * If we don't get a completion before this time something is really
829 * wrong and we time out.
831 timeout = CEC_XFER_TIMEOUT_MS;
832 /* Add the requested timeout if we have to wait for a reply as well */
834 timeout += msg->timeout;
837 * Release the lock and wait, retake the lock afterwards.
839 mutex_unlock(&adap->lock);
840 res = wait_for_completion_killable_timeout(&data->c,
841 msecs_to_jiffies(timeout));
842 mutex_lock(&adap->lock);
844 if (data->completed) {
845 /* The transmit completed (possibly with an error) */
851 * The wait for completion timed out or was interrupted, so mark this
852 * as non-blocking and disconnect from the filehandle since it is
853 * still 'in flight'. When it finally completes it will just drop the
856 data->blocking = false;
858 list_del(&data->xfer_list);
861 if (res == 0) { /* timed out */
862 /* Check if the reply or the transmit failed */
863 if (msg->timeout && (msg->tx_status & CEC_TX_STATUS_OK))
864 msg->rx_status = CEC_RX_STATUS_TIMEOUT;
866 msg->tx_status = CEC_TX_STATUS_MAX_RETRIES;
868 return res > 0 ? 0 : res;
871 /* Helper function to be used by drivers and this framework. */
872 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
877 mutex_lock(&adap->lock);
878 ret = cec_transmit_msg_fh(adap, msg, NULL, block);
879 mutex_unlock(&adap->lock);
882 EXPORT_SYMBOL_GPL(cec_transmit_msg);
885 * I don't like forward references but without this the low-level
886 * cec_received_msg() function would come after a bunch of high-level
887 * CEC protocol handling functions. That was very confusing.
889 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
892 #define DIRECTED 0x80
893 #define BCAST1_4 0x40
894 #define BCAST2_0 0x20 /* broadcast only allowed for >= 2.0 */
895 #define BCAST (BCAST1_4 | BCAST2_0)
896 #define BOTH (BCAST | DIRECTED)
899 * Specify minimum length and whether the message is directed, broadcast
900 * or both. Messages that do not match the criteria are ignored as per
901 * the CEC specification.
903 static const u8 cec_msg_size[256] = {
904 [CEC_MSG_ACTIVE_SOURCE] = 4 | BCAST,
905 [CEC_MSG_IMAGE_VIEW_ON] = 2 | DIRECTED,
906 [CEC_MSG_TEXT_VIEW_ON] = 2 | DIRECTED,
907 [CEC_MSG_INACTIVE_SOURCE] = 4 | DIRECTED,
908 [CEC_MSG_REQUEST_ACTIVE_SOURCE] = 2 | BCAST,
909 [CEC_MSG_ROUTING_CHANGE] = 6 | BCAST,
910 [CEC_MSG_ROUTING_INFORMATION] = 4 | BCAST,
911 [CEC_MSG_SET_STREAM_PATH] = 4 | BCAST,
912 [CEC_MSG_STANDBY] = 2 | BOTH,
913 [CEC_MSG_RECORD_OFF] = 2 | DIRECTED,
914 [CEC_MSG_RECORD_ON] = 3 | DIRECTED,
915 [CEC_MSG_RECORD_STATUS] = 3 | DIRECTED,
916 [CEC_MSG_RECORD_TV_SCREEN] = 2 | DIRECTED,
917 [CEC_MSG_CLEAR_ANALOGUE_TIMER] = 13 | DIRECTED,
918 [CEC_MSG_CLEAR_DIGITAL_TIMER] = 16 | DIRECTED,
919 [CEC_MSG_CLEAR_EXT_TIMER] = 13 | DIRECTED,
920 [CEC_MSG_SET_ANALOGUE_TIMER] = 13 | DIRECTED,
921 [CEC_MSG_SET_DIGITAL_TIMER] = 16 | DIRECTED,
922 [CEC_MSG_SET_EXT_TIMER] = 13 | DIRECTED,
923 [CEC_MSG_SET_TIMER_PROGRAM_TITLE] = 2 | DIRECTED,
924 [CEC_MSG_TIMER_CLEARED_STATUS] = 3 | DIRECTED,
925 [CEC_MSG_TIMER_STATUS] = 3 | DIRECTED,
926 [CEC_MSG_CEC_VERSION] = 3 | DIRECTED,
927 [CEC_MSG_GET_CEC_VERSION] = 2 | DIRECTED,
928 [CEC_MSG_GIVE_PHYSICAL_ADDR] = 2 | DIRECTED,
929 [CEC_MSG_GET_MENU_LANGUAGE] = 2 | DIRECTED,
930 [CEC_MSG_REPORT_PHYSICAL_ADDR] = 5 | BCAST,
931 [CEC_MSG_SET_MENU_LANGUAGE] = 5 | BCAST,
932 [CEC_MSG_REPORT_FEATURES] = 6 | BCAST,
933 [CEC_MSG_GIVE_FEATURES] = 2 | DIRECTED,
934 [CEC_MSG_DECK_CONTROL] = 3 | DIRECTED,
935 [CEC_MSG_DECK_STATUS] = 3 | DIRECTED,
936 [CEC_MSG_GIVE_DECK_STATUS] = 3 | DIRECTED,
937 [CEC_MSG_PLAY] = 3 | DIRECTED,
938 [CEC_MSG_GIVE_TUNER_DEVICE_STATUS] = 3 | DIRECTED,
939 [CEC_MSG_SELECT_ANALOGUE_SERVICE] = 6 | DIRECTED,
940 [CEC_MSG_SELECT_DIGITAL_SERVICE] = 9 | DIRECTED,
941 [CEC_MSG_TUNER_DEVICE_STATUS] = 7 | DIRECTED,
942 [CEC_MSG_TUNER_STEP_DECREMENT] = 2 | DIRECTED,
943 [CEC_MSG_TUNER_STEP_INCREMENT] = 2 | DIRECTED,
944 [CEC_MSG_DEVICE_VENDOR_ID] = 5 | BCAST,
945 [CEC_MSG_GIVE_DEVICE_VENDOR_ID] = 2 | DIRECTED,
946 [CEC_MSG_VENDOR_COMMAND] = 2 | DIRECTED,
947 [CEC_MSG_VENDOR_COMMAND_WITH_ID] = 5 | BOTH,
948 [CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN] = 2 | BOTH,
949 [CEC_MSG_VENDOR_REMOTE_BUTTON_UP] = 2 | BOTH,
950 [CEC_MSG_SET_OSD_STRING] = 3 | DIRECTED,
951 [CEC_MSG_GIVE_OSD_NAME] = 2 | DIRECTED,
952 [CEC_MSG_SET_OSD_NAME] = 2 | DIRECTED,
953 [CEC_MSG_MENU_REQUEST] = 3 | DIRECTED,
954 [CEC_MSG_MENU_STATUS] = 3 | DIRECTED,
955 [CEC_MSG_USER_CONTROL_PRESSED] = 3 | DIRECTED,
956 [CEC_MSG_USER_CONTROL_RELEASED] = 2 | DIRECTED,
957 [CEC_MSG_GIVE_DEVICE_POWER_STATUS] = 2 | DIRECTED,
958 [CEC_MSG_REPORT_POWER_STATUS] = 3 | DIRECTED | BCAST2_0,
959 [CEC_MSG_FEATURE_ABORT] = 4 | DIRECTED,
960 [CEC_MSG_ABORT] = 2 | DIRECTED,
961 [CEC_MSG_GIVE_AUDIO_STATUS] = 2 | DIRECTED,
962 [CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS] = 2 | DIRECTED,
963 [CEC_MSG_REPORT_AUDIO_STATUS] = 3 | DIRECTED,
964 [CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
965 [CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
966 [CEC_MSG_SET_SYSTEM_AUDIO_MODE] = 3 | BOTH,
967 [CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST] = 2 | DIRECTED,
968 [CEC_MSG_SYSTEM_AUDIO_MODE_STATUS] = 3 | DIRECTED,
969 [CEC_MSG_SET_AUDIO_RATE] = 3 | DIRECTED,
970 [CEC_MSG_INITIATE_ARC] = 2 | DIRECTED,
971 [CEC_MSG_REPORT_ARC_INITIATED] = 2 | DIRECTED,
972 [CEC_MSG_REPORT_ARC_TERMINATED] = 2 | DIRECTED,
973 [CEC_MSG_REQUEST_ARC_INITIATION] = 2 | DIRECTED,
974 [CEC_MSG_REQUEST_ARC_TERMINATION] = 2 | DIRECTED,
975 [CEC_MSG_TERMINATE_ARC] = 2 | DIRECTED,
976 [CEC_MSG_REQUEST_CURRENT_LATENCY] = 4 | BCAST,
977 [CEC_MSG_REPORT_CURRENT_LATENCY] = 6 | BCAST,
978 [CEC_MSG_CDC_MESSAGE] = 2 | BCAST,
981 /* Called by the CEC adapter if a message is received */
982 void cec_received_msg_ts(struct cec_adapter *adap,
983 struct cec_msg *msg, ktime_t ts)
985 struct cec_data *data;
986 u8 msg_init = cec_msg_initiator(msg);
987 u8 msg_dest = cec_msg_destination(msg);
988 u8 cmd = msg->msg[1];
989 bool is_reply = false;
990 bool valid_la = true;
993 if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE))
997 * Some CEC adapters will receive the messages that they transmitted.
998 * This test filters out those messages by checking if we are the
999 * initiator, and just returning in that case.
1001 * Note that this won't work if this is an Unregistered device.
1003 * It is bad practice if the hardware receives the message that it
1004 * transmitted and luckily most CEC adapters behave correctly in this
1007 if (msg_init != CEC_LOG_ADDR_UNREGISTERED &&
1008 cec_has_log_addr(adap, msg_init))
1011 msg->rx_ts = ktime_to_ns(ts);
1012 msg->rx_status = CEC_RX_STATUS_OK;
1013 msg->sequence = msg->reply = msg->timeout = 0;
1016 msg->tx_arb_lost_cnt = 0;
1017 msg->tx_nack_cnt = 0;
1018 msg->tx_low_drive_cnt = 0;
1019 msg->tx_error_cnt = 0;
1021 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
1023 mutex_lock(&adap->lock);
1024 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1026 /* Check if this message was for us (directed or broadcast). */
1027 if (!cec_msg_is_broadcast(msg))
1028 valid_la = cec_has_log_addr(adap, msg_dest);
1031 * Check if the length is not too short or if the message is a
1032 * broadcast message where a directed message was expected or
1033 * vice versa. If so, then the message has to be ignored (according
1034 * to section CEC 7.3 and CEC 12.2).
1036 if (valid_la && msg->len > 1 && cec_msg_size[cmd]) {
1037 u8 dir_fl = cec_msg_size[cmd] & BOTH;
1039 min_len = cec_msg_size[cmd] & 0x1f;
1040 if (msg->len < min_len)
1042 else if (!cec_msg_is_broadcast(msg) && !(dir_fl & DIRECTED))
1044 else if (cec_msg_is_broadcast(msg) && !(dir_fl & BCAST))
1046 else if (cec_msg_is_broadcast(msg) &&
1047 adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0 &&
1048 !(dir_fl & BCAST1_4))
1051 if (valid_la && min_len) {
1052 /* These messages have special length requirements */
1054 case CEC_MSG_TIMER_STATUS:
1055 if (msg->msg[2] & 0x10) {
1056 switch (msg->msg[2] & 0xf) {
1057 case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE:
1058 case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE:
1063 } else if ((msg->msg[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE) {
1068 case CEC_MSG_RECORD_ON:
1069 switch (msg->msg[2]) {
1070 case CEC_OP_RECORD_SRC_OWN:
1072 case CEC_OP_RECORD_SRC_DIGITAL:
1076 case CEC_OP_RECORD_SRC_ANALOG:
1080 case CEC_OP_RECORD_SRC_EXT_PLUG:
1084 case CEC_OP_RECORD_SRC_EXT_PHYS_ADDR:
1093 /* It's a valid message and not a poll or CDC message */
1094 if (valid_la && msg->len > 1 && cmd != CEC_MSG_CDC_MESSAGE) {
1095 bool abort = cmd == CEC_MSG_FEATURE_ABORT;
1097 /* The aborted command is in msg[2] */
1102 * Walk over all transmitted messages that are waiting for a
1105 list_for_each_entry(data, &adap->wait_queue, list) {
1106 struct cec_msg *dst = &data->msg;
1109 * The *only* CEC message that has two possible replies
1110 * is CEC_MSG_INITIATE_ARC.
1111 * In this case allow either of the two replies.
1113 if (!abort && dst->msg[1] == CEC_MSG_INITIATE_ARC &&
1114 (cmd == CEC_MSG_REPORT_ARC_INITIATED ||
1115 cmd == CEC_MSG_REPORT_ARC_TERMINATED) &&
1116 (dst->reply == CEC_MSG_REPORT_ARC_INITIATED ||
1117 dst->reply == CEC_MSG_REPORT_ARC_TERMINATED))
1120 /* Does the command match? */
1121 if ((abort && cmd != dst->msg[1]) ||
1122 (!abort && cmd != dst->reply))
1125 /* Does the addressing match? */
1126 if (msg_init != cec_msg_destination(dst) &&
1127 !cec_msg_is_broadcast(dst))
1130 /* We got a reply */
1131 memcpy(dst->msg, msg->msg, msg->len);
1132 dst->len = msg->len;
1133 dst->rx_ts = msg->rx_ts;
1134 dst->rx_status = msg->rx_status;
1136 dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT;
1137 msg->flags = dst->flags;
1138 msg->sequence = dst->sequence;
1139 /* Remove it from the wait_queue */
1140 list_del_init(&data->list);
1142 /* Cancel the pending timeout work */
1143 if (!cancel_delayed_work(&data->work)) {
1144 mutex_unlock(&adap->lock);
1145 flush_scheduled_work();
1146 mutex_lock(&adap->lock);
1149 * Mark this as a reply, provided someone is still
1150 * waiting for the answer.
1154 cec_data_completed(data);
1158 mutex_unlock(&adap->lock);
1160 /* Pass the message on to any monitoring filehandles */
1161 cec_queue_msg_monitor(adap, msg, valid_la);
1163 /* We're done if it is not for us or a poll message */
1164 if (!valid_la || msg->len <= 1)
1167 if (adap->log_addrs.log_addr_mask == 0)
1171 * Process the message on the protocol level. If is_reply is true,
1172 * then cec_receive_notify() won't pass on the reply to the listener(s)
1173 * since that was already done by cec_data_completed() above.
1175 cec_receive_notify(adap, msg, is_reply);
1177 EXPORT_SYMBOL_GPL(cec_received_msg_ts);
1179 /* Logical Address Handling */
1182 * Attempt to claim a specific logical address.
1184 * This function is called with adap->lock held.
1186 static int cec_config_log_addr(struct cec_adapter *adap,
1188 unsigned int log_addr)
1190 struct cec_log_addrs *las = &adap->log_addrs;
1191 struct cec_msg msg = { };
1194 if (cec_has_log_addr(adap, log_addr))
1197 /* Send poll message */
1199 msg.msg[0] = (log_addr << 4) | log_addr;
1200 err = cec_transmit_msg_fh(adap, &msg, NULL, true);
1203 * While trying to poll the physical address was reset
1204 * and the adapter was unconfigured, so bail out.
1206 if (!adap->is_configuring)
1212 if (msg.tx_status & CEC_TX_STATUS_OK)
1216 * Message not acknowledged, so this logical
1217 * address is free to use.
1219 err = adap->ops->adap_log_addr(adap, log_addr);
1223 las->log_addr[idx] = log_addr;
1224 las->log_addr_mask |= 1 << log_addr;
1225 adap->phys_addrs[log_addr] = adap->phys_addr;
1230 * Unconfigure the adapter: clear all logical addresses and send
1231 * the state changed event.
1233 * This function is called with adap->lock held.
1235 static void cec_adap_unconfigure(struct cec_adapter *adap)
1237 if (!adap->needs_hpd ||
1238 adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1239 WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID));
1240 adap->log_addrs.log_addr_mask = 0;
1241 adap->is_configuring = false;
1242 adap->is_configured = false;
1243 memset(adap->phys_addrs, 0xff, sizeof(adap->phys_addrs));
1245 wake_up_interruptible(&adap->kthread_waitq);
1246 cec_post_state_event(adap);
1250 * Attempt to claim the required logical addresses.
1252 static int cec_config_thread_func(void *arg)
1254 /* The various LAs for each type of device */
1255 static const u8 tv_log_addrs[] = {
1256 CEC_LOG_ADDR_TV, CEC_LOG_ADDR_SPECIFIC,
1257 CEC_LOG_ADDR_INVALID
1259 static const u8 record_log_addrs[] = {
1260 CEC_LOG_ADDR_RECORD_1, CEC_LOG_ADDR_RECORD_2,
1261 CEC_LOG_ADDR_RECORD_3,
1262 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1263 CEC_LOG_ADDR_INVALID
1265 static const u8 tuner_log_addrs[] = {
1266 CEC_LOG_ADDR_TUNER_1, CEC_LOG_ADDR_TUNER_2,
1267 CEC_LOG_ADDR_TUNER_3, CEC_LOG_ADDR_TUNER_4,
1268 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1269 CEC_LOG_ADDR_INVALID
1271 static const u8 playback_log_addrs[] = {
1272 CEC_LOG_ADDR_PLAYBACK_1, CEC_LOG_ADDR_PLAYBACK_2,
1273 CEC_LOG_ADDR_PLAYBACK_3,
1274 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1275 CEC_LOG_ADDR_INVALID
1277 static const u8 audiosystem_log_addrs[] = {
1278 CEC_LOG_ADDR_AUDIOSYSTEM,
1279 CEC_LOG_ADDR_INVALID
1281 static const u8 specific_use_log_addrs[] = {
1282 CEC_LOG_ADDR_SPECIFIC,
1283 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1284 CEC_LOG_ADDR_INVALID
1286 static const u8 *type2addrs[6] = {
1287 [CEC_LOG_ADDR_TYPE_TV] = tv_log_addrs,
1288 [CEC_LOG_ADDR_TYPE_RECORD] = record_log_addrs,
1289 [CEC_LOG_ADDR_TYPE_TUNER] = tuner_log_addrs,
1290 [CEC_LOG_ADDR_TYPE_PLAYBACK] = playback_log_addrs,
1291 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = audiosystem_log_addrs,
1292 [CEC_LOG_ADDR_TYPE_SPECIFIC] = specific_use_log_addrs,
1294 static const u16 type2mask[] = {
1295 [CEC_LOG_ADDR_TYPE_TV] = CEC_LOG_ADDR_MASK_TV,
1296 [CEC_LOG_ADDR_TYPE_RECORD] = CEC_LOG_ADDR_MASK_RECORD,
1297 [CEC_LOG_ADDR_TYPE_TUNER] = CEC_LOG_ADDR_MASK_TUNER,
1298 [CEC_LOG_ADDR_TYPE_PLAYBACK] = CEC_LOG_ADDR_MASK_PLAYBACK,
1299 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
1300 [CEC_LOG_ADDR_TYPE_SPECIFIC] = CEC_LOG_ADDR_MASK_SPECIFIC,
1302 struct cec_adapter *adap = arg;
1303 struct cec_log_addrs *las = &adap->log_addrs;
1307 mutex_lock(&adap->lock);
1308 dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n",
1309 cec_phys_addr_exp(adap->phys_addr), las->num_log_addrs);
1310 las->log_addr_mask = 0;
1312 if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED)
1315 for (i = 0; i < las->num_log_addrs; i++) {
1316 unsigned int type = las->log_addr_type[i];
1321 * The TV functionality can only map to physical address 0.
1322 * For any other address, try the Specific functionality
1323 * instead as per the spec.
1325 if (adap->phys_addr && type == CEC_LOG_ADDR_TYPE_TV)
1326 type = CEC_LOG_ADDR_TYPE_SPECIFIC;
1328 la_list = type2addrs[type];
1329 last_la = las->log_addr[i];
1330 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1331 if (last_la == CEC_LOG_ADDR_INVALID ||
1332 last_la == CEC_LOG_ADDR_UNREGISTERED ||
1333 !((1 << last_la) & type2mask[type]))
1334 last_la = la_list[0];
1336 err = cec_config_log_addr(adap, i, last_la);
1337 if (err > 0) /* Reused last LA */
1343 for (j = 0; la_list[j] != CEC_LOG_ADDR_INVALID; j++) {
1344 /* Tried this one already, skip it */
1345 if (la_list[j] == last_la)
1347 /* The backup addresses are CEC 2.0 specific */
1348 if ((la_list[j] == CEC_LOG_ADDR_BACKUP_1 ||
1349 la_list[j] == CEC_LOG_ADDR_BACKUP_2) &&
1350 las->cec_version < CEC_OP_CEC_VERSION_2_0)
1353 err = cec_config_log_addr(adap, i, la_list[j]);
1354 if (err == 0) /* LA is in use */
1358 /* Done, claimed an LA */
1362 if (la_list[j] == CEC_LOG_ADDR_INVALID)
1363 dprintk(1, "could not claim LA %d\n", i);
1366 if (adap->log_addrs.log_addr_mask == 0 &&
1367 !(las->flags & CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK))
1371 if (adap->log_addrs.log_addr_mask == 0) {
1372 /* Fall back to unregistered */
1373 las->log_addr[0] = CEC_LOG_ADDR_UNREGISTERED;
1374 las->log_addr_mask = 1 << las->log_addr[0];
1375 for (i = 1; i < las->num_log_addrs; i++)
1376 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1378 for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
1379 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1380 adap->is_configured = true;
1381 adap->is_configuring = false;
1382 cec_post_state_event(adap);
1385 * Now post the Report Features and Report Physical Address broadcast
1386 * messages. Note that these are non-blocking transmits, meaning that
1387 * they are just queued up and once adap->lock is unlocked the main
1388 * thread will kick in and start transmitting these.
1390 * If after this function is done (but before one or more of these
1391 * messages are actually transmitted) the CEC adapter is unconfigured,
1392 * then any remaining messages will be dropped by the main thread.
1394 for (i = 0; i < las->num_log_addrs; i++) {
1395 struct cec_msg msg = {};
1397 if (las->log_addr[i] == CEC_LOG_ADDR_INVALID ||
1398 (las->flags & CEC_LOG_ADDRS_FL_CDC_ONLY))
1401 msg.msg[0] = (las->log_addr[i] << 4) | 0x0f;
1403 /* Report Features must come first according to CEC 2.0 */
1404 if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED &&
1405 adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0) {
1406 cec_fill_msg_report_features(adap, &msg, i);
1407 cec_transmit_msg_fh(adap, &msg, NULL, false);
1410 /* Report Physical Address */
1411 cec_msg_report_physical_addr(&msg, adap->phys_addr,
1412 las->primary_device_type[i]);
1413 dprintk(1, "config: la %d pa %x.%x.%x.%x\n",
1415 cec_phys_addr_exp(adap->phys_addr));
1416 cec_transmit_msg_fh(adap, &msg, NULL, false);
1418 /* Report Vendor ID */
1419 if (adap->log_addrs.vendor_id != CEC_VENDOR_ID_NONE) {
1420 cec_msg_device_vendor_id(&msg,
1421 adap->log_addrs.vendor_id);
1422 cec_transmit_msg_fh(adap, &msg, NULL, false);
1425 adap->kthread_config = NULL;
1426 complete(&adap->config_completion);
1427 mutex_unlock(&adap->lock);
1431 for (i = 0; i < las->num_log_addrs; i++)
1432 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1433 cec_adap_unconfigure(adap);
1434 adap->kthread_config = NULL;
1435 mutex_unlock(&adap->lock);
1436 complete(&adap->config_completion);
1441 * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the
1442 * logical addresses.
1444 * This function is called with adap->lock held.
1446 static void cec_claim_log_addrs(struct cec_adapter *adap, bool block)
1448 if (WARN_ON(adap->is_configuring || adap->is_configured))
1451 init_completion(&adap->config_completion);
1453 /* Ready to kick off the thread */
1454 adap->is_configuring = true;
1455 adap->kthread_config = kthread_run(cec_config_thread_func, adap,
1456 "ceccfg-%s", adap->name);
1457 if (IS_ERR(adap->kthread_config)) {
1458 adap->kthread_config = NULL;
1460 mutex_unlock(&adap->lock);
1461 wait_for_completion(&adap->config_completion);
1462 mutex_lock(&adap->lock);
1466 /* Set a new physical address and send an event notifying userspace of this.
1468 * This function is called with adap->lock held.
1470 void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1472 if (phys_addr == adap->phys_addr)
1474 if (phys_addr != CEC_PHYS_ADDR_INVALID && adap->devnode.unregistered)
1477 dprintk(1, "new physical address %x.%x.%x.%x\n",
1478 cec_phys_addr_exp(phys_addr));
1479 if (phys_addr == CEC_PHYS_ADDR_INVALID ||
1480 adap->phys_addr != CEC_PHYS_ADDR_INVALID) {
1481 adap->phys_addr = CEC_PHYS_ADDR_INVALID;
1482 cec_post_state_event(adap);
1483 cec_adap_unconfigure(adap);
1484 /* Disabling monitor all mode should always succeed */
1485 if (adap->monitor_all_cnt)
1486 WARN_ON(call_op(adap, adap_monitor_all_enable, false));
1487 mutex_lock(&adap->devnode.lock);
1488 if (adap->needs_hpd || list_empty(&adap->devnode.fhs))
1489 WARN_ON(adap->ops->adap_enable(adap, false));
1490 mutex_unlock(&adap->devnode.lock);
1491 if (phys_addr == CEC_PHYS_ADDR_INVALID)
1495 mutex_lock(&adap->devnode.lock);
1496 if ((adap->needs_hpd || list_empty(&adap->devnode.fhs)) &&
1497 adap->ops->adap_enable(adap, true)) {
1498 mutex_unlock(&adap->devnode.lock);
1502 if (adap->monitor_all_cnt &&
1503 call_op(adap, adap_monitor_all_enable, true)) {
1504 if (adap->needs_hpd || list_empty(&adap->devnode.fhs))
1505 WARN_ON(adap->ops->adap_enable(adap, false));
1506 mutex_unlock(&adap->devnode.lock);
1509 mutex_unlock(&adap->devnode.lock);
1511 adap->phys_addr = phys_addr;
1512 cec_post_state_event(adap);
1513 if (adap->log_addrs.num_log_addrs)
1514 cec_claim_log_addrs(adap, block);
1517 void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1519 if (IS_ERR_OR_NULL(adap))
1522 mutex_lock(&adap->lock);
1523 __cec_s_phys_addr(adap, phys_addr, block);
1524 mutex_unlock(&adap->lock);
1526 EXPORT_SYMBOL_GPL(cec_s_phys_addr);
1528 void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
1529 const struct edid *edid)
1531 u16 pa = CEC_PHYS_ADDR_INVALID;
1533 if (edid && edid->extensions)
1534 pa = cec_get_edid_phys_addr((const u8 *)edid,
1535 EDID_LENGTH * (edid->extensions + 1), NULL);
1536 cec_s_phys_addr(adap, pa, false);
1538 EXPORT_SYMBOL_GPL(cec_s_phys_addr_from_edid);
1541 * Called from either the ioctl or a driver to set the logical addresses.
1543 * This function is called with adap->lock held.
1545 int __cec_s_log_addrs(struct cec_adapter *adap,
1546 struct cec_log_addrs *log_addrs, bool block)
1551 if (adap->devnode.unregistered)
1554 if (!log_addrs || log_addrs->num_log_addrs == 0) {
1555 cec_adap_unconfigure(adap);
1556 adap->log_addrs.num_log_addrs = 0;
1557 for (i = 0; i < CEC_MAX_LOG_ADDRS; i++)
1558 adap->log_addrs.log_addr[i] = CEC_LOG_ADDR_INVALID;
1559 adap->log_addrs.osd_name[0] = '\0';
1560 adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
1561 adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
1565 if (log_addrs->flags & CEC_LOG_ADDRS_FL_CDC_ONLY) {
1567 * Sanitize log_addrs fields if a CDC-Only device is
1570 log_addrs->num_log_addrs = 1;
1571 log_addrs->osd_name[0] = '\0';
1572 log_addrs->vendor_id = CEC_VENDOR_ID_NONE;
1573 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
1575 * This is just an internal convention since a CDC-Only device
1576 * doesn't have to be a switch. But switches already use
1577 * unregistered, so it makes some kind of sense to pick this
1578 * as the primary device. Since a CDC-Only device never sends
1579 * any 'normal' CEC messages this primary device type is never
1580 * sent over the CEC bus.
1582 log_addrs->primary_device_type[0] = CEC_OP_PRIM_DEVTYPE_SWITCH;
1583 log_addrs->all_device_types[0] = 0;
1584 log_addrs->features[0][0] = 0;
1585 log_addrs->features[0][1] = 0;
1588 /* Ensure the osd name is 0-terminated */
1589 log_addrs->osd_name[sizeof(log_addrs->osd_name) - 1] = '\0';
1592 if (log_addrs->num_log_addrs > adap->available_log_addrs) {
1593 dprintk(1, "num_log_addrs > %d\n", adap->available_log_addrs);
1598 * Vendor ID is a 24 bit number, so check if the value is
1599 * within the correct range.
1601 if (log_addrs->vendor_id != CEC_VENDOR_ID_NONE &&
1602 (log_addrs->vendor_id & 0xff000000) != 0) {
1603 dprintk(1, "invalid vendor ID\n");
1607 if (log_addrs->cec_version != CEC_OP_CEC_VERSION_1_4 &&
1608 log_addrs->cec_version != CEC_OP_CEC_VERSION_2_0) {
1609 dprintk(1, "invalid CEC version\n");
1613 if (log_addrs->num_log_addrs > 1)
1614 for (i = 0; i < log_addrs->num_log_addrs; i++)
1615 if (log_addrs->log_addr_type[i] ==
1616 CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1617 dprintk(1, "num_log_addrs > 1 can't be combined with unregistered LA\n");
1621 for (i = 0; i < log_addrs->num_log_addrs; i++) {
1622 const u8 feature_sz = ARRAY_SIZE(log_addrs->features[0]);
1623 u8 *features = log_addrs->features[i];
1624 bool op_is_dev_features = false;
1627 log_addrs->log_addr[i] = CEC_LOG_ADDR_INVALID;
1628 if (log_addrs->log_addr_type[i] > CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1629 dprintk(1, "unknown logical address type\n");
1632 if (type_mask & (1 << log_addrs->log_addr_type[i])) {
1633 dprintk(1, "duplicate logical address type\n");
1636 type_mask |= 1 << log_addrs->log_addr_type[i];
1637 if ((type_mask & (1 << CEC_LOG_ADDR_TYPE_RECORD)) &&
1638 (type_mask & (1 << CEC_LOG_ADDR_TYPE_PLAYBACK))) {
1639 /* Record already contains the playback functionality */
1640 dprintk(1, "invalid record + playback combination\n");
1643 if (log_addrs->primary_device_type[i] >
1644 CEC_OP_PRIM_DEVTYPE_PROCESSOR) {
1645 dprintk(1, "unknown primary device type\n");
1648 if (log_addrs->primary_device_type[i] == 2) {
1649 dprintk(1, "invalid primary device type\n");
1652 for (j = 0; j < feature_sz; j++) {
1653 if ((features[j] & 0x80) == 0) {
1654 if (op_is_dev_features)
1656 op_is_dev_features = true;
1659 if (!op_is_dev_features || j == feature_sz) {
1660 dprintk(1, "malformed features\n");
1663 /* Zero unused part of the feature array */
1664 memset(features + j + 1, 0, feature_sz - j - 1);
1667 if (log_addrs->cec_version >= CEC_OP_CEC_VERSION_2_0) {
1668 if (log_addrs->num_log_addrs > 2) {
1669 dprintk(1, "CEC 2.0 allows no more than 2 logical addresses\n");
1672 if (log_addrs->num_log_addrs == 2) {
1673 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM) |
1674 (1 << CEC_LOG_ADDR_TYPE_TV)))) {
1675 dprintk(1, "two LAs is only allowed for audiosystem and TV\n");
1678 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK) |
1679 (1 << CEC_LOG_ADDR_TYPE_RECORD)))) {
1680 dprintk(1, "an audiosystem/TV can only be combined with record or playback\n");
1686 /* Zero unused LAs */
1687 for (i = log_addrs->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++) {
1688 log_addrs->primary_device_type[i] = 0;
1689 log_addrs->log_addr_type[i] = 0;
1690 log_addrs->all_device_types[i] = 0;
1691 memset(log_addrs->features[i], 0,
1692 sizeof(log_addrs->features[i]));
1695 log_addrs->log_addr_mask = adap->log_addrs.log_addr_mask;
1696 adap->log_addrs = *log_addrs;
1697 if (adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1698 cec_claim_log_addrs(adap, block);
1702 int cec_s_log_addrs(struct cec_adapter *adap,
1703 struct cec_log_addrs *log_addrs, bool block)
1707 mutex_lock(&adap->lock);
1708 err = __cec_s_log_addrs(adap, log_addrs, block);
1709 mutex_unlock(&adap->lock);
1712 EXPORT_SYMBOL_GPL(cec_s_log_addrs);
1714 /* High-level core CEC message handling */
1716 /* Fill in the Report Features message */
1717 static void cec_fill_msg_report_features(struct cec_adapter *adap,
1718 struct cec_msg *msg,
1719 unsigned int la_idx)
1721 const struct cec_log_addrs *las = &adap->log_addrs;
1722 const u8 *features = las->features[la_idx];
1723 bool op_is_dev_features = false;
1726 /* Report Features */
1727 msg->msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
1729 msg->msg[1] = CEC_MSG_REPORT_FEATURES;
1730 msg->msg[2] = adap->log_addrs.cec_version;
1731 msg->msg[3] = las->all_device_types[la_idx];
1733 /* Write RC Profiles first, then Device Features */
1734 for (idx = 0; idx < ARRAY_SIZE(las->features[0]); idx++) {
1735 msg->msg[msg->len++] = features[idx];
1736 if ((features[idx] & CEC_OP_FEAT_EXT) == 0) {
1737 if (op_is_dev_features)
1739 op_is_dev_features = true;
1744 /* Transmit the Feature Abort message */
1745 static int cec_feature_abort_reason(struct cec_adapter *adap,
1746 struct cec_msg *msg, u8 reason)
1748 struct cec_msg tx_msg = { };
1751 * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT
1754 if (msg->msg[1] == CEC_MSG_FEATURE_ABORT)
1756 /* Don't Feature Abort messages from 'Unregistered' */
1757 if (cec_msg_initiator(msg) == CEC_LOG_ADDR_UNREGISTERED)
1759 cec_msg_set_reply_to(&tx_msg, msg);
1760 cec_msg_feature_abort(&tx_msg, msg->msg[1], reason);
1761 return cec_transmit_msg(adap, &tx_msg, false);
1764 static int cec_feature_abort(struct cec_adapter *adap, struct cec_msg *msg)
1766 return cec_feature_abort_reason(adap, msg,
1767 CEC_OP_ABORT_UNRECOGNIZED_OP);
1770 static int cec_feature_refused(struct cec_adapter *adap, struct cec_msg *msg)
1772 return cec_feature_abort_reason(adap, msg,
1773 CEC_OP_ABORT_REFUSED);
1777 * Called when a CEC message is received. This function will do any
1778 * necessary core processing. The is_reply bool is true if this message
1779 * is a reply to an earlier transmit.
1781 * The message is either a broadcast message or a valid directed message.
1783 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
1786 bool is_broadcast = cec_msg_is_broadcast(msg);
1787 u8 dest_laddr = cec_msg_destination(msg);
1788 u8 init_laddr = cec_msg_initiator(msg);
1789 u8 devtype = cec_log_addr2dev(adap, dest_laddr);
1790 int la_idx = cec_log_addr2idx(adap, dest_laddr);
1791 bool from_unregistered = init_laddr == 0xf;
1792 struct cec_msg tx_cec_msg = { };
1793 #ifdef CONFIG_MEDIA_CEC_RC
1797 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1799 /* If this is a CDC-Only device, then ignore any non-CDC messages */
1800 if (cec_is_cdc_only(&adap->log_addrs) &&
1801 msg->msg[1] != CEC_MSG_CDC_MESSAGE)
1804 if (adap->ops->received) {
1805 /* Allow drivers to process the message first */
1806 if (adap->ops->received(adap, msg) != -ENOMSG)
1811 * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and
1812 * CEC_MSG_USER_CONTROL_RELEASED messages always have to be
1813 * handled by the CEC core, even if the passthrough mode is on.
1814 * The others are just ignored if passthrough mode is on.
1816 switch (msg->msg[1]) {
1817 case CEC_MSG_GET_CEC_VERSION:
1819 case CEC_MSG_GIVE_DEVICE_POWER_STATUS:
1820 case CEC_MSG_GIVE_OSD_NAME:
1822 * These messages reply with a directed message, so ignore if
1823 * the initiator is Unregistered.
1825 if (!adap->passthrough && from_unregistered)
1828 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
1829 case CEC_MSG_GIVE_FEATURES:
1830 case CEC_MSG_GIVE_PHYSICAL_ADDR:
1832 * Skip processing these messages if the passthrough mode
1835 if (adap->passthrough)
1836 goto skip_processing;
1837 /* Ignore if addressing is wrong */
1842 case CEC_MSG_USER_CONTROL_PRESSED:
1843 case CEC_MSG_USER_CONTROL_RELEASED:
1844 /* Wrong addressing mode: don't process */
1845 if (is_broadcast || from_unregistered)
1846 goto skip_processing;
1849 case CEC_MSG_REPORT_PHYSICAL_ADDR:
1851 * This message is always processed, regardless of the
1852 * passthrough setting.
1854 * Exception: don't process if wrong addressing mode.
1857 goto skip_processing;
1864 cec_msg_set_reply_to(&tx_cec_msg, msg);
1866 switch (msg->msg[1]) {
1867 /* The following messages are processed but still passed through */
1868 case CEC_MSG_REPORT_PHYSICAL_ADDR: {
1869 u16 pa = (msg->msg[2] << 8) | msg->msg[3];
1871 if (!from_unregistered)
1872 adap->phys_addrs[init_laddr] = pa;
1873 dprintk(1, "reported physical address %x.%x.%x.%x for logical address %d\n",
1874 cec_phys_addr_exp(pa), init_laddr);
1878 case CEC_MSG_USER_CONTROL_PRESSED:
1879 if (!(adap->capabilities & CEC_CAP_RC) ||
1880 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
1883 #ifdef CONFIG_MEDIA_CEC_RC
1884 switch (msg->msg[2]) {
1886 * Play function, this message can have variable length
1887 * depending on the specific play function that is used.
1891 scancode = msg->msg[2];
1893 scancode = msg->msg[2] << 8 | msg->msg[3];
1896 * Other function messages that are not handled.
1897 * Currently the RC framework does not allow to supply an
1898 * additional parameter to a keypress. These "keys" contain
1899 * other information such as channel number, an input number
1901 * For the time being these messages are not processed by the
1902 * framework and are simply forwarded to the user space.
1904 case 0x56: case 0x57:
1905 case 0x67: case 0x68: case 0x69: case 0x6a:
1909 scancode = msg->msg[2];
1913 /* Was repeating, but keypress timed out */
1914 if (adap->rc_repeating && !adap->rc->keypressed) {
1915 adap->rc_repeating = false;
1916 adap->rc_last_scancode = -1;
1918 /* Different keypress from last time, ends repeat mode */
1919 if (adap->rc_last_scancode != scancode) {
1921 adap->rc_repeating = false;
1923 /* We can't handle this scancode */
1925 adap->rc_last_scancode = scancode;
1929 /* Send key press */
1930 rc_keydown(adap->rc, RC_PROTO_CEC, scancode, 0);
1932 /* When in repeating mode, we're done */
1933 if (adap->rc_repeating)
1937 * We are not repeating, but the new scancode is
1938 * the same as the last one, and this second key press is
1939 * within 550 ms (the 'Follower Safety Timeout') from the
1940 * previous key press, so we now enable the repeating mode.
1942 if (adap->rc_last_scancode == scancode &&
1943 msg->rx_ts - adap->rc_last_keypress < 550 * NSEC_PER_MSEC) {
1944 adap->rc_repeating = true;
1948 * Not in repeating mode, so avoid triggering repeat mode
1952 adap->rc_last_scancode = scancode;
1953 adap->rc_last_keypress = msg->rx_ts;
1957 case CEC_MSG_USER_CONTROL_RELEASED:
1958 if (!(adap->capabilities & CEC_CAP_RC) ||
1959 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
1961 #ifdef CONFIG_MEDIA_CEC_RC
1963 adap->rc_repeating = false;
1964 adap->rc_last_scancode = -1;
1969 * The remaining messages are only processed if the passthrough mode
1972 case CEC_MSG_GET_CEC_VERSION:
1973 cec_msg_cec_version(&tx_cec_msg, adap->log_addrs.cec_version);
1974 return cec_transmit_msg(adap, &tx_cec_msg, false);
1976 case CEC_MSG_GIVE_PHYSICAL_ADDR:
1977 /* Do nothing for CEC switches using addr 15 */
1978 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH && dest_laddr == 15)
1980 cec_msg_report_physical_addr(&tx_cec_msg, adap->phys_addr, devtype);
1981 return cec_transmit_msg(adap, &tx_cec_msg, false);
1983 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
1984 if (adap->log_addrs.vendor_id == CEC_VENDOR_ID_NONE)
1985 return cec_feature_abort(adap, msg);
1986 cec_msg_device_vendor_id(&tx_cec_msg, adap->log_addrs.vendor_id);
1987 return cec_transmit_msg(adap, &tx_cec_msg, false);
1990 /* Do nothing for CEC switches */
1991 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH)
1993 return cec_feature_refused(adap, msg);
1995 case CEC_MSG_GIVE_OSD_NAME: {
1996 if (adap->log_addrs.osd_name[0] == 0)
1997 return cec_feature_abort(adap, msg);
1998 cec_msg_set_osd_name(&tx_cec_msg, adap->log_addrs.osd_name);
1999 return cec_transmit_msg(adap, &tx_cec_msg, false);
2002 case CEC_MSG_GIVE_FEATURES:
2003 if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
2004 return cec_feature_abort(adap, msg);
2005 cec_fill_msg_report_features(adap, &tx_cec_msg, la_idx);
2006 return cec_transmit_msg(adap, &tx_cec_msg, false);
2010 * Unprocessed messages are aborted if userspace isn't doing
2011 * any processing either.
2013 if (!is_broadcast && !is_reply && !adap->follower_cnt &&
2014 !adap->cec_follower && msg->msg[1] != CEC_MSG_FEATURE_ABORT)
2015 return cec_feature_abort(adap, msg);
2020 /* If this was a reply, then we're done, unless otherwise specified */
2021 if (is_reply && !(msg->flags & CEC_MSG_FL_REPLY_TO_FOLLOWERS))
2025 * Send to the exclusive follower if there is one, otherwise send
2028 if (adap->cec_follower)
2029 cec_queue_msg_fh(adap->cec_follower, msg);
2031 cec_queue_msg_followers(adap, msg);
2036 * Helper functions to keep track of the 'monitor all' use count.
2038 * These functions are called with adap->lock held.
2040 int cec_monitor_all_cnt_inc(struct cec_adapter *adap)
2044 if (adap->monitor_all_cnt == 0)
2045 ret = call_op(adap, adap_monitor_all_enable, 1);
2047 adap->monitor_all_cnt++;
2051 void cec_monitor_all_cnt_dec(struct cec_adapter *adap)
2053 adap->monitor_all_cnt--;
2054 if (adap->monitor_all_cnt == 0)
2055 WARN_ON(call_op(adap, adap_monitor_all_enable, 0));
2058 #ifdef CONFIG_DEBUG_FS
2060 * Log the current state of the CEC adapter.
2061 * Very useful for debugging.
2063 int cec_adap_status(struct seq_file *file, void *priv)
2065 struct cec_adapter *adap = dev_get_drvdata(file->private);
2066 struct cec_data *data;
2068 mutex_lock(&adap->lock);
2069 seq_printf(file, "configured: %d\n", adap->is_configured);
2070 seq_printf(file, "configuring: %d\n", adap->is_configuring);
2071 seq_printf(file, "phys_addr: %x.%x.%x.%x\n",
2072 cec_phys_addr_exp(adap->phys_addr));
2073 seq_printf(file, "number of LAs: %d\n", adap->log_addrs.num_log_addrs);
2074 seq_printf(file, "LA mask: 0x%04x\n", adap->log_addrs.log_addr_mask);
2075 if (adap->cec_follower)
2076 seq_printf(file, "has CEC follower%s\n",
2077 adap->passthrough ? " (in passthrough mode)" : "");
2078 if (adap->cec_initiator)
2079 seq_puts(file, "has CEC initiator\n");
2080 if (adap->monitor_all_cnt)
2081 seq_printf(file, "file handles in Monitor All mode: %u\n",
2082 adap->monitor_all_cnt);
2083 if (adap->tx_timeouts) {
2084 seq_printf(file, "transmit timeouts: %u\n",
2086 adap->tx_timeouts = 0;
2088 data = adap->transmitting;
2090 seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
2091 data->msg.len, data->msg.msg, data->msg.reply,
2093 seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz);
2094 list_for_each_entry(data, &adap->transmit_queue, list) {
2095 seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
2096 data->msg.len, data->msg.msg, data->msg.reply,
2099 list_for_each_entry(data, &adap->wait_queue, list) {
2100 seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
2101 data->msg.len, data->msg.msg, data->msg.reply,
2105 call_void_op(adap, adap_status, file);
2106 mutex_unlock(&adap->lock);