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
,
184 .lost_msgs
.lost_msgs
= 1,
186 struct cec_msg_entry
*entry
;
188 mutex_lock(&fh
->lock
);
189 entry
= kmalloc(sizeof(*entry
), GFP_KERNEL
);
192 /* Add new msg at the end of the queue */
193 list_add_tail(&entry
->list
, &fh
->msgs
);
195 if (fh
->queued_msgs
< CEC_MAX_MSG_RX_QUEUE_SZ
) {
196 /* All is fine if there is enough room */
198 mutex_unlock(&fh
->lock
);
199 wake_up_interruptible(&fh
->wait
);
204 * if the message queue is full, then drop the oldest one and
205 * send a lost message event.
207 entry
= list_first_entry(&fh
->msgs
, struct cec_msg_entry
, list
);
208 list_del(&entry
->list
);
211 mutex_unlock(&fh
->lock
);
214 * We lost a message, either because kmalloc failed or the queue
217 cec_queue_event_fh(fh
, &ev_lost_msgs
, ktime_get_ns());
221 * Queue the message for those filehandles that are in monitor mode.
222 * If valid_la is true (this message is for us or was sent by us),
223 * then pass it on to any monitoring filehandle. If this message
224 * isn't for us or from us, then only give it to filehandles that
225 * are in MONITOR_ALL mode.
227 * This can only happen if the CEC_CAP_MONITOR_ALL capability is
228 * set and the CEC adapter was placed in 'monitor all' mode.
230 static void cec_queue_msg_monitor(struct cec_adapter
*adap
,
231 const struct cec_msg
*msg
,
235 u32 monitor_mode
= valid_la
? CEC_MODE_MONITOR
:
236 CEC_MODE_MONITOR_ALL
;
238 mutex_lock(&adap
->devnode
.lock
);
239 list_for_each_entry(fh
, &adap
->devnode
.fhs
, list
) {
240 if (fh
->mode_follower
>= monitor_mode
)
241 cec_queue_msg_fh(fh
, msg
);
243 mutex_unlock(&adap
->devnode
.lock
);
247 * Queue the message for follower filehandles.
249 static void cec_queue_msg_followers(struct cec_adapter
*adap
,
250 const struct cec_msg
*msg
)
254 mutex_lock(&adap
->devnode
.lock
);
255 list_for_each_entry(fh
, &adap
->devnode
.fhs
, list
) {
256 if (fh
->mode_follower
== CEC_MODE_FOLLOWER
)
257 cec_queue_msg_fh(fh
, msg
);
259 mutex_unlock(&adap
->devnode
.lock
);
262 /* Notify userspace of an adapter state change. */
263 static void cec_post_state_event(struct cec_adapter
*adap
)
265 struct cec_event ev
= {
266 .event
= CEC_EVENT_STATE_CHANGE
,
269 ev
.state_change
.phys_addr
= adap
->phys_addr
;
270 ev
.state_change
.log_addr_mask
= adap
->log_addrs
.log_addr_mask
;
271 cec_queue_event(adap
, &ev
);
275 * A CEC transmit (and a possible wait for reply) completed.
276 * If this was in blocking mode, then complete it, otherwise
277 * queue the message for userspace to dequeue later.
279 * This function is called with adap->lock held.
281 static void cec_data_completed(struct cec_data
*data
)
284 * Delete this transmit from the filehandle's xfer_list since
285 * we're done with it.
287 * Note that if the filehandle is closed before this transmit
288 * finished, then the release() function will set data->fh to NULL.
289 * Without that we would be referring to a closed filehandle.
292 list_del(&data
->xfer_list
);
294 if (data
->blocking
) {
296 * Someone is blocking so mark the message as completed
299 data
->completed
= true;
303 * No blocking, so just queue the message if needed and
307 cec_queue_msg_fh(data
->fh
, &data
->msg
);
313 * A pending CEC transmit needs to be cancelled, either because the CEC
314 * adapter is disabled or the transmit takes an impossibly long time to
317 * This function is called with adap->lock held.
319 static void cec_data_cancel(struct cec_data
*data
)
322 * It's either the current transmit, or it is a pending
323 * transmit. Take the appropriate action to clear it.
325 if (data
->adap
->transmitting
== data
) {
326 data
->adap
->transmitting
= NULL
;
328 list_del_init(&data
->list
);
329 if (!(data
->msg
.tx_status
& CEC_TX_STATUS_OK
))
330 data
->adap
->transmit_queue_sz
--;
333 /* Mark it as an error */
334 data
->msg
.tx_ts
= ktime_get_ns();
335 data
->msg
.tx_status
|= CEC_TX_STATUS_ERROR
|
336 CEC_TX_STATUS_MAX_RETRIES
;
337 data
->msg
.tx_error_cnt
++;
339 /* Queue transmitted message for monitoring purposes */
340 cec_queue_msg_monitor(data
->adap
, &data
->msg
, 1);
342 cec_data_completed(data
);
346 * Flush all pending transmits and cancel any pending timeout work.
348 * This function is called with adap->lock held.
350 static void cec_flush(struct cec_adapter
*adap
)
352 struct cec_data
*data
, *n
;
355 * If the adapter is disabled, or we're asked to stop,
356 * then cancel any pending transmits.
358 while (!list_empty(&adap
->transmit_queue
)) {
359 data
= list_first_entry(&adap
->transmit_queue
,
360 struct cec_data
, list
);
361 cec_data_cancel(data
);
363 if (adap
->transmitting
)
364 cec_data_cancel(adap
->transmitting
);
366 /* Cancel the pending timeout work. */
367 list_for_each_entry_safe(data
, n
, &adap
->wait_queue
, list
) {
368 if (cancel_delayed_work(&data
->work
))
369 cec_data_cancel(data
);
371 * If cancel_delayed_work returned false, then
372 * the cec_wait_timeout function is running,
373 * which will call cec_data_completed. So no
374 * need to do anything special in that case.
380 * Main CEC state machine
382 * Wait until the thread should be stopped, or we are not transmitting and
383 * a new transmit message is queued up, in which case we start transmitting
384 * that message. When the adapter finished transmitting the message it will
385 * call cec_transmit_done().
387 * If the adapter is disabled, then remove all queued messages instead.
389 * If the current transmit times out, then cancel that transmit.
391 int cec_thread_func(void *_adap
)
393 struct cec_adapter
*adap
= _adap
;
396 unsigned int signal_free_time
;
397 struct cec_data
*data
;
398 bool timeout
= false;
401 if (adap
->transmitting
) {
405 * We are transmitting a message, so add a timeout
406 * to prevent the state machine to get stuck waiting
407 * for this message to finalize and add a check to
408 * see if the adapter is disabled in which case the
409 * transmit should be canceled.
411 err
= wait_event_interruptible_timeout(adap
->kthread_waitq
,
413 (!adap
->is_configured
&& !adap
->is_configuring
)) ||
414 kthread_should_stop() ||
415 (!adap
->transmitting
&&
416 !list_empty(&adap
->transmit_queue
)),
417 msecs_to_jiffies(CEC_XFER_TIMEOUT_MS
));
420 /* Otherwise we just wait for something to happen. */
421 wait_event_interruptible(adap
->kthread_waitq
,
422 kthread_should_stop() ||
423 (!adap
->transmitting
&&
424 !list_empty(&adap
->transmit_queue
)));
427 mutex_lock(&adap
->lock
);
429 if ((adap
->needs_hpd
&&
430 (!adap
->is_configured
&& !adap
->is_configuring
)) ||
431 kthread_should_stop()) {
436 if (adap
->transmitting
&& timeout
) {
438 * If we timeout, then log that. Normally this does
439 * not happen and it is an indication of a faulty CEC
440 * adapter driver, or the CEC bus is in some weird
441 * state. On rare occasions it can happen if there is
442 * so much traffic on the bus that the adapter was
443 * unable to transmit for CEC_XFER_TIMEOUT_MS (2.1s).
445 dprintk(1, "%s: message %*ph timed out\n", __func__
,
446 adap
->transmitting
->msg
.len
,
447 adap
->transmitting
->msg
.msg
);
449 /* Just give up on this. */
450 cec_data_cancel(adap
->transmitting
);
455 * If we are still transmitting, or there is nothing new to
456 * transmit, then just continue waiting.
458 if (adap
->transmitting
|| list_empty(&adap
->transmit_queue
))
461 /* Get a new message to transmit */
462 data
= list_first_entry(&adap
->transmit_queue
,
463 struct cec_data
, list
);
464 list_del_init(&data
->list
);
465 adap
->transmit_queue_sz
--;
467 /* Make this the current transmitting message */
468 adap
->transmitting
= data
;
471 * Suggested number of attempts as per the CEC 2.0 spec:
472 * 4 attempts is the default, except for 'secondary poll
473 * messages', i.e. poll messages not sent during the adapter
474 * configuration phase when it allocates logical addresses.
476 if (data
->msg
.len
== 1 && adap
->is_configured
)
481 /* Set the suggested signal free time */
482 if (data
->attempts
) {
483 /* should be >= 3 data bit periods for a retry */
484 signal_free_time
= CEC_SIGNAL_FREE_TIME_RETRY
;
485 } else if (data
->new_initiator
) {
486 /* should be >= 5 data bit periods for new initiator */
487 signal_free_time
= CEC_SIGNAL_FREE_TIME_NEW_INITIATOR
;
490 * should be >= 7 data bit periods for sending another
491 * frame immediately after another.
493 signal_free_time
= CEC_SIGNAL_FREE_TIME_NEXT_XFER
;
495 if (data
->attempts
== 0)
496 data
->attempts
= attempts
;
498 /* Tell the adapter to transmit, cancel on error */
499 if (adap
->ops
->adap_transmit(adap
, data
->attempts
,
500 signal_free_time
, &data
->msg
))
501 cec_data_cancel(data
);
504 mutex_unlock(&adap
->lock
);
506 if (kthread_should_stop())
513 * Called by the CEC adapter if a transmit finished.
515 void cec_transmit_done_ts(struct cec_adapter
*adap
, u8 status
,
516 u8 arb_lost_cnt
, u8 nack_cnt
, u8 low_drive_cnt
,
517 u8 error_cnt
, ktime_t ts
)
519 struct cec_data
*data
;
521 unsigned int attempts_made
= arb_lost_cnt
+ nack_cnt
+
522 low_drive_cnt
+ error_cnt
;
524 dprintk(2, "%s: status %02x\n", __func__
, status
);
525 if (attempts_made
< 1)
528 mutex_lock(&adap
->lock
);
529 data
= adap
->transmitting
;
532 * This can happen if a transmit was issued and the cable is
533 * unplugged while the transmit is ongoing. Ignore this
534 * transmit in that case.
536 dprintk(1, "%s was called without an ongoing transmit!\n",
543 /* Drivers must fill in the status! */
544 WARN_ON(status
== 0);
545 msg
->tx_ts
= ktime_to_ns(ts
);
546 msg
->tx_status
|= status
;
547 msg
->tx_arb_lost_cnt
+= arb_lost_cnt
;
548 msg
->tx_nack_cnt
+= nack_cnt
;
549 msg
->tx_low_drive_cnt
+= low_drive_cnt
;
550 msg
->tx_error_cnt
+= error_cnt
;
552 /* Mark that we're done with this transmit */
553 adap
->transmitting
= NULL
;
556 * If there are still retry attempts left and there was an error and
557 * the hardware didn't signal that it retried itself (by setting
558 * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves.
560 if (data
->attempts
> attempts_made
&&
561 !(status
& (CEC_TX_STATUS_MAX_RETRIES
| CEC_TX_STATUS_OK
))) {
562 /* Retry this message */
563 data
->attempts
-= attempts_made
;
565 dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
566 msg
->len
, msg
->msg
, data
->attempts
, msg
->reply
);
568 dprintk(2, "retransmit: %*ph (attempts: %d)\n",
569 msg
->len
, msg
->msg
, data
->attempts
);
570 /* Add the message in front of the transmit queue */
571 list_add(&data
->list
, &adap
->transmit_queue
);
572 adap
->transmit_queue_sz
++;
578 /* Always set CEC_TX_STATUS_MAX_RETRIES on error */
579 if (!(status
& CEC_TX_STATUS_OK
))
580 msg
->tx_status
|= CEC_TX_STATUS_MAX_RETRIES
;
582 /* Queue transmitted message for monitoring purposes */
583 cec_queue_msg_monitor(adap
, msg
, 1);
585 if ((status
& CEC_TX_STATUS_OK
) && adap
->is_configured
&&
588 * Queue the message into the wait queue if we want to wait
591 list_add_tail(&data
->list
, &adap
->wait_queue
);
592 schedule_delayed_work(&data
->work
,
593 msecs_to_jiffies(msg
->timeout
));
595 /* Otherwise we're done */
596 cec_data_completed(data
);
601 * Wake up the main thread to see if another message is ready
602 * for transmitting or to retry the current message.
604 wake_up_interruptible(&adap
->kthread_waitq
);
606 mutex_unlock(&adap
->lock
);
608 EXPORT_SYMBOL_GPL(cec_transmit_done_ts
);
610 void cec_transmit_attempt_done_ts(struct cec_adapter
*adap
,
611 u8 status
, ktime_t ts
)
613 switch (status
& ~CEC_TX_STATUS_MAX_RETRIES
) {
614 case CEC_TX_STATUS_OK
:
615 cec_transmit_done_ts(adap
, status
, 0, 0, 0, 0, ts
);
617 case CEC_TX_STATUS_ARB_LOST
:
618 cec_transmit_done_ts(adap
, status
, 1, 0, 0, 0, ts
);
620 case CEC_TX_STATUS_NACK
:
621 cec_transmit_done_ts(adap
, status
, 0, 1, 0, 0, ts
);
623 case CEC_TX_STATUS_LOW_DRIVE
:
624 cec_transmit_done_ts(adap
, status
, 0, 0, 1, 0, ts
);
626 case CEC_TX_STATUS_ERROR
:
627 cec_transmit_done_ts(adap
, status
, 0, 0, 0, 1, ts
);
630 /* Should never happen */
631 WARN(1, "cec-%s: invalid status 0x%02x\n", adap
->name
, status
);
635 EXPORT_SYMBOL_GPL(cec_transmit_attempt_done_ts
);
638 * Called when waiting for a reply times out.
640 static void cec_wait_timeout(struct work_struct
*work
)
642 struct cec_data
*data
= container_of(work
, struct cec_data
, work
.work
);
643 struct cec_adapter
*adap
= data
->adap
;
645 mutex_lock(&adap
->lock
);
647 * Sanity check in case the timeout and the arrival of the message
648 * happened at the same time.
650 if (list_empty(&data
->list
))
653 /* Mark the message as timed out */
654 list_del_init(&data
->list
);
655 data
->msg
.rx_ts
= ktime_get_ns();
656 data
->msg
.rx_status
= CEC_RX_STATUS_TIMEOUT
;
657 cec_data_completed(data
);
659 mutex_unlock(&adap
->lock
);
663 * Transmit a message. The fh argument may be NULL if the transmit is not
664 * associated with a specific filehandle.
666 * This function is called with adap->lock held.
668 int cec_transmit_msg_fh(struct cec_adapter
*adap
, struct cec_msg
*msg
,
669 struct cec_fh
*fh
, bool block
)
671 struct cec_data
*data
;
672 u8 last_initiator
= 0xff;
673 unsigned int timeout
;
680 msg
->tx_arb_lost_cnt
= 0;
681 msg
->tx_nack_cnt
= 0;
682 msg
->tx_low_drive_cnt
= 0;
683 msg
->tx_error_cnt
= 0;
686 if (msg
->reply
&& msg
->timeout
== 0) {
687 /* Make sure the timeout isn't 0. */
691 msg
->flags
&= CEC_MSG_FL_REPLY_TO_FOLLOWERS
;
696 if (msg
->len
== 0 || msg
->len
> CEC_MAX_MSG_SIZE
) {
697 dprintk(1, "%s: invalid length %d\n", __func__
, msg
->len
);
700 if (msg
->timeout
&& msg
->len
== 1) {
701 dprintk(1, "%s: can't reply for poll msg\n", __func__
);
704 memset(msg
->msg
+ msg
->len
, 0, sizeof(msg
->msg
) - msg
->len
);
706 if (cec_msg_destination(msg
) == 0xf) {
707 dprintk(1, "%s: invalid poll message\n", __func__
);
710 if (cec_has_log_addr(adap
, cec_msg_destination(msg
))) {
712 * If the destination is a logical address our adapter
713 * has already claimed, then just NACK this.
714 * It depends on the hardware what it will do with a
715 * POLL to itself (some OK this), so it is just as
716 * easy to handle it here so the behavior will be
719 msg
->tx_ts
= ktime_get_ns();
720 msg
->tx_status
= CEC_TX_STATUS_NACK
|
721 CEC_TX_STATUS_MAX_RETRIES
;
722 msg
->tx_nack_cnt
= 1;
723 msg
->sequence
= ++adap
->sequence
;
725 msg
->sequence
= ++adap
->sequence
;
729 if (msg
->len
> 1 && !cec_msg_is_broadcast(msg
) &&
730 cec_has_log_addr(adap
, cec_msg_destination(msg
))) {
731 dprintk(1, "%s: destination is the adapter itself\n", __func__
);
734 if (msg
->len
> 1 && adap
->is_configured
&&
735 !cec_has_log_addr(adap
, cec_msg_initiator(msg
))) {
736 dprintk(1, "%s: initiator has unknown logical address %d\n",
737 __func__
, cec_msg_initiator(msg
));
740 if (!adap
->is_configured
&& !adap
->is_configuring
) {
741 if (adap
->needs_hpd
|| msg
->msg
[0] != 0xf0) {
742 dprintk(1, "%s: adapter is unconfigured\n", __func__
);
746 dprintk(1, "%s: invalid msg->reply\n", __func__
);
751 if (adap
->transmit_queue_sz
>= CEC_MAX_MSG_TX_QUEUE_SZ
) {
752 dprintk(1, "%s: transmit queue full\n", __func__
);
756 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
760 msg
->sequence
= ++adap
->sequence
;
762 msg
->sequence
= ++adap
->sequence
;
764 if (msg
->len
> 1 && msg
->msg
[1] == CEC_MSG_CDC_MESSAGE
) {
765 msg
->msg
[2] = adap
->phys_addr
>> 8;
766 msg
->msg
[3] = adap
->phys_addr
& 0xff;
770 dprintk(2, "%s: %*ph (wait for 0x%02x%s)\n",
771 __func__
, msg
->len
, msg
->msg
, msg
->reply
,
772 !block
? ", nb" : "");
774 dprintk(2, "%s: %*ph%s\n",
775 __func__
, msg
->len
, msg
->msg
, !block
? " (nb)" : "");
780 data
->blocking
= block
;
783 * Determine if this message follows a message from the same
784 * initiator. Needed to determine the free signal time later on.
787 if (!(list_empty(&adap
->transmit_queue
))) {
788 const struct cec_data
*last
;
790 last
= list_last_entry(&adap
->transmit_queue
,
791 const struct cec_data
, list
);
792 last_initiator
= cec_msg_initiator(&last
->msg
);
793 } else if (adap
->transmitting
) {
795 cec_msg_initiator(&adap
->transmitting
->msg
);
798 data
->new_initiator
= last_initiator
!= cec_msg_initiator(msg
);
799 init_completion(&data
->c
);
800 INIT_DELAYED_WORK(&data
->work
, cec_wait_timeout
);
803 list_add_tail(&data
->xfer_list
, &fh
->xfer_list
);
805 list_add_tail(&data
->list
, &adap
->transmit_queue
);
806 adap
->transmit_queue_sz
++;
807 if (!adap
->transmitting
)
808 wake_up_interruptible(&adap
->kthread_waitq
);
810 /* All done if we don't need to block waiting for completion */
815 * If we don't get a completion before this time something is really
816 * wrong and we time out.
818 timeout
= CEC_XFER_TIMEOUT_MS
;
819 /* Add the requested timeout if we have to wait for a reply as well */
821 timeout
+= msg
->timeout
;
824 * Release the lock and wait, retake the lock afterwards.
826 mutex_unlock(&adap
->lock
);
827 res
= wait_for_completion_killable_timeout(&data
->c
,
828 msecs_to_jiffies(timeout
));
829 mutex_lock(&adap
->lock
);
831 if (data
->completed
) {
832 /* The transmit completed (possibly with an error) */
838 * The wait for completion timed out or was interrupted, so mark this
839 * as non-blocking and disconnect from the filehandle since it is
840 * still 'in flight'. When it finally completes it will just drop the
843 data
->blocking
= false;
845 list_del(&data
->xfer_list
);
848 if (res
== 0) { /* timed out */
849 /* Check if the reply or the transmit failed */
850 if (msg
->timeout
&& (msg
->tx_status
& CEC_TX_STATUS_OK
))
851 msg
->rx_status
= CEC_RX_STATUS_TIMEOUT
;
853 msg
->tx_status
= CEC_TX_STATUS_MAX_RETRIES
;
855 return res
> 0 ? 0 : res
;
858 /* Helper function to be used by drivers and this framework. */
859 int cec_transmit_msg(struct cec_adapter
*adap
, struct cec_msg
*msg
,
864 mutex_lock(&adap
->lock
);
865 ret
= cec_transmit_msg_fh(adap
, msg
, NULL
, block
);
866 mutex_unlock(&adap
->lock
);
869 EXPORT_SYMBOL_GPL(cec_transmit_msg
);
872 * I don't like forward references but without this the low-level
873 * cec_received_msg() function would come after a bunch of high-level
874 * CEC protocol handling functions. That was very confusing.
876 static int cec_receive_notify(struct cec_adapter
*adap
, struct cec_msg
*msg
,
879 #define DIRECTED 0x80
880 #define BCAST1_4 0x40
881 #define BCAST2_0 0x20 /* broadcast only allowed for >= 2.0 */
882 #define BCAST (BCAST1_4 | BCAST2_0)
883 #define BOTH (BCAST | DIRECTED)
886 * Specify minimum length and whether the message is directed, broadcast
887 * or both. Messages that do not match the criteria are ignored as per
888 * the CEC specification.
890 static const u8 cec_msg_size
[256] = {
891 [CEC_MSG_ACTIVE_SOURCE
] = 4 | BCAST
,
892 [CEC_MSG_IMAGE_VIEW_ON
] = 2 | DIRECTED
,
893 [CEC_MSG_TEXT_VIEW_ON
] = 2 | DIRECTED
,
894 [CEC_MSG_INACTIVE_SOURCE
] = 4 | DIRECTED
,
895 [CEC_MSG_REQUEST_ACTIVE_SOURCE
] = 2 | BCAST
,
896 [CEC_MSG_ROUTING_CHANGE
] = 6 | BCAST
,
897 [CEC_MSG_ROUTING_INFORMATION
] = 4 | BCAST
,
898 [CEC_MSG_SET_STREAM_PATH
] = 4 | BCAST
,
899 [CEC_MSG_STANDBY
] = 2 | BOTH
,
900 [CEC_MSG_RECORD_OFF
] = 2 | DIRECTED
,
901 [CEC_MSG_RECORD_ON
] = 3 | DIRECTED
,
902 [CEC_MSG_RECORD_STATUS
] = 3 | DIRECTED
,
903 [CEC_MSG_RECORD_TV_SCREEN
] = 2 | DIRECTED
,
904 [CEC_MSG_CLEAR_ANALOGUE_TIMER
] = 13 | DIRECTED
,
905 [CEC_MSG_CLEAR_DIGITAL_TIMER
] = 16 | DIRECTED
,
906 [CEC_MSG_CLEAR_EXT_TIMER
] = 13 | DIRECTED
,
907 [CEC_MSG_SET_ANALOGUE_TIMER
] = 13 | DIRECTED
,
908 [CEC_MSG_SET_DIGITAL_TIMER
] = 16 | DIRECTED
,
909 [CEC_MSG_SET_EXT_TIMER
] = 13 | DIRECTED
,
910 [CEC_MSG_SET_TIMER_PROGRAM_TITLE
] = 2 | DIRECTED
,
911 [CEC_MSG_TIMER_CLEARED_STATUS
] = 3 | DIRECTED
,
912 [CEC_MSG_TIMER_STATUS
] = 3 | DIRECTED
,
913 [CEC_MSG_CEC_VERSION
] = 3 | DIRECTED
,
914 [CEC_MSG_GET_CEC_VERSION
] = 2 | DIRECTED
,
915 [CEC_MSG_GIVE_PHYSICAL_ADDR
] = 2 | DIRECTED
,
916 [CEC_MSG_GET_MENU_LANGUAGE
] = 2 | DIRECTED
,
917 [CEC_MSG_REPORT_PHYSICAL_ADDR
] = 5 | BCAST
,
918 [CEC_MSG_SET_MENU_LANGUAGE
] = 5 | BCAST
,
919 [CEC_MSG_REPORT_FEATURES
] = 6 | BCAST
,
920 [CEC_MSG_GIVE_FEATURES
] = 2 | DIRECTED
,
921 [CEC_MSG_DECK_CONTROL
] = 3 | DIRECTED
,
922 [CEC_MSG_DECK_STATUS
] = 3 | DIRECTED
,
923 [CEC_MSG_GIVE_DECK_STATUS
] = 3 | DIRECTED
,
924 [CEC_MSG_PLAY
] = 3 | DIRECTED
,
925 [CEC_MSG_GIVE_TUNER_DEVICE_STATUS
] = 3 | DIRECTED
,
926 [CEC_MSG_SELECT_ANALOGUE_SERVICE
] = 6 | DIRECTED
,
927 [CEC_MSG_SELECT_DIGITAL_SERVICE
] = 9 | DIRECTED
,
928 [CEC_MSG_TUNER_DEVICE_STATUS
] = 7 | DIRECTED
,
929 [CEC_MSG_TUNER_STEP_DECREMENT
] = 2 | DIRECTED
,
930 [CEC_MSG_TUNER_STEP_INCREMENT
] = 2 | DIRECTED
,
931 [CEC_MSG_DEVICE_VENDOR_ID
] = 5 | BCAST
,
932 [CEC_MSG_GIVE_DEVICE_VENDOR_ID
] = 2 | DIRECTED
,
933 [CEC_MSG_VENDOR_COMMAND
] = 2 | DIRECTED
,
934 [CEC_MSG_VENDOR_COMMAND_WITH_ID
] = 5 | BOTH
,
935 [CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN
] = 2 | BOTH
,
936 [CEC_MSG_VENDOR_REMOTE_BUTTON_UP
] = 2 | BOTH
,
937 [CEC_MSG_SET_OSD_STRING
] = 3 | DIRECTED
,
938 [CEC_MSG_GIVE_OSD_NAME
] = 2 | DIRECTED
,
939 [CEC_MSG_SET_OSD_NAME
] = 2 | DIRECTED
,
940 [CEC_MSG_MENU_REQUEST
] = 3 | DIRECTED
,
941 [CEC_MSG_MENU_STATUS
] = 3 | DIRECTED
,
942 [CEC_MSG_USER_CONTROL_PRESSED
] = 3 | DIRECTED
,
943 [CEC_MSG_USER_CONTROL_RELEASED
] = 2 | DIRECTED
,
944 [CEC_MSG_GIVE_DEVICE_POWER_STATUS
] = 2 | DIRECTED
,
945 [CEC_MSG_REPORT_POWER_STATUS
] = 3 | DIRECTED
| BCAST2_0
,
946 [CEC_MSG_FEATURE_ABORT
] = 4 | DIRECTED
,
947 [CEC_MSG_ABORT
] = 2 | DIRECTED
,
948 [CEC_MSG_GIVE_AUDIO_STATUS
] = 2 | DIRECTED
,
949 [CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS
] = 2 | DIRECTED
,
950 [CEC_MSG_REPORT_AUDIO_STATUS
] = 3 | DIRECTED
,
951 [CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR
] = 2 | DIRECTED
,
952 [CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR
] = 2 | DIRECTED
,
953 [CEC_MSG_SET_SYSTEM_AUDIO_MODE
] = 3 | BOTH
,
954 [CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST
] = 2 | DIRECTED
,
955 [CEC_MSG_SYSTEM_AUDIO_MODE_STATUS
] = 3 | DIRECTED
,
956 [CEC_MSG_SET_AUDIO_RATE
] = 3 | DIRECTED
,
957 [CEC_MSG_INITIATE_ARC
] = 2 | DIRECTED
,
958 [CEC_MSG_REPORT_ARC_INITIATED
] = 2 | DIRECTED
,
959 [CEC_MSG_REPORT_ARC_TERMINATED
] = 2 | DIRECTED
,
960 [CEC_MSG_REQUEST_ARC_INITIATION
] = 2 | DIRECTED
,
961 [CEC_MSG_REQUEST_ARC_TERMINATION
] = 2 | DIRECTED
,
962 [CEC_MSG_TERMINATE_ARC
] = 2 | DIRECTED
,
963 [CEC_MSG_REQUEST_CURRENT_LATENCY
] = 4 | BCAST
,
964 [CEC_MSG_REPORT_CURRENT_LATENCY
] = 6 | BCAST
,
965 [CEC_MSG_CDC_MESSAGE
] = 2 | BCAST
,
968 /* Called by the CEC adapter if a message is received */
969 void cec_received_msg_ts(struct cec_adapter
*adap
,
970 struct cec_msg
*msg
, ktime_t ts
)
972 struct cec_data
*data
;
973 u8 msg_init
= cec_msg_initiator(msg
);
974 u8 msg_dest
= cec_msg_destination(msg
);
975 u8 cmd
= msg
->msg
[1];
976 bool is_reply
= false;
977 bool valid_la
= true;
980 if (WARN_ON(!msg
->len
|| msg
->len
> CEC_MAX_MSG_SIZE
))
984 * Some CEC adapters will receive the messages that they transmitted.
985 * This test filters out those messages by checking if we are the
986 * initiator, and just returning in that case.
988 * Note that this won't work if this is an Unregistered device.
990 * It is bad practice if the hardware receives the message that it
991 * transmitted and luckily most CEC adapters behave correctly in this
994 if (msg_init
!= CEC_LOG_ADDR_UNREGISTERED
&&
995 cec_has_log_addr(adap
, msg_init
))
998 msg
->rx_ts
= ktime_to_ns(ts
);
999 msg
->rx_status
= CEC_RX_STATUS_OK
;
1000 msg
->sequence
= msg
->reply
= msg
->timeout
= 0;
1003 msg
->tx_arb_lost_cnt
= 0;
1004 msg
->tx_nack_cnt
= 0;
1005 msg
->tx_low_drive_cnt
= 0;
1006 msg
->tx_error_cnt
= 0;
1008 memset(msg
->msg
+ msg
->len
, 0, sizeof(msg
->msg
) - msg
->len
);
1010 mutex_lock(&adap
->lock
);
1011 dprintk(2, "%s: %*ph\n", __func__
, msg
->len
, msg
->msg
);
1013 /* Check if this message was for us (directed or broadcast). */
1014 if (!cec_msg_is_broadcast(msg
))
1015 valid_la
= cec_has_log_addr(adap
, msg_dest
);
1018 * Check if the length is not too short or if the message is a
1019 * broadcast message where a directed message was expected or
1020 * vice versa. If so, then the message has to be ignored (according
1021 * to section CEC 7.3 and CEC 12.2).
1023 if (valid_la
&& msg
->len
> 1 && cec_msg_size
[cmd
]) {
1024 u8 dir_fl
= cec_msg_size
[cmd
] & BOTH
;
1026 min_len
= cec_msg_size
[cmd
] & 0x1f;
1027 if (msg
->len
< min_len
)
1029 else if (!cec_msg_is_broadcast(msg
) && !(dir_fl
& DIRECTED
))
1031 else if (cec_msg_is_broadcast(msg
) && !(dir_fl
& BCAST1_4
))
1033 else if (cec_msg_is_broadcast(msg
) &&
1034 adap
->log_addrs
.cec_version
>= CEC_OP_CEC_VERSION_2_0
&&
1035 !(dir_fl
& BCAST2_0
))
1038 if (valid_la
&& min_len
) {
1039 /* These messages have special length requirements */
1041 case CEC_MSG_TIMER_STATUS
:
1042 if (msg
->msg
[2] & 0x10) {
1043 switch (msg
->msg
[2] & 0xf) {
1044 case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE
:
1045 case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE
:
1050 } else if ((msg
->msg
[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE
) {
1055 case CEC_MSG_RECORD_ON
:
1056 switch (msg
->msg
[2]) {
1057 case CEC_OP_RECORD_SRC_OWN
:
1059 case CEC_OP_RECORD_SRC_DIGITAL
:
1063 case CEC_OP_RECORD_SRC_ANALOG
:
1067 case CEC_OP_RECORD_SRC_EXT_PLUG
:
1071 case CEC_OP_RECORD_SRC_EXT_PHYS_ADDR
:
1080 /* It's a valid message and not a poll or CDC message */
1081 if (valid_la
&& msg
->len
> 1 && cmd
!= CEC_MSG_CDC_MESSAGE
) {
1082 bool abort
= cmd
== CEC_MSG_FEATURE_ABORT
;
1084 /* The aborted command is in msg[2] */
1089 * Walk over all transmitted messages that are waiting for a
1092 list_for_each_entry(data
, &adap
->wait_queue
, list
) {
1093 struct cec_msg
*dst
= &data
->msg
;
1096 * The *only* CEC message that has two possible replies
1097 * is CEC_MSG_INITIATE_ARC.
1098 * In this case allow either of the two replies.
1100 if (!abort
&& dst
->msg
[1] == CEC_MSG_INITIATE_ARC
&&
1101 (cmd
== CEC_MSG_REPORT_ARC_INITIATED
||
1102 cmd
== CEC_MSG_REPORT_ARC_TERMINATED
) &&
1103 (dst
->reply
== CEC_MSG_REPORT_ARC_INITIATED
||
1104 dst
->reply
== CEC_MSG_REPORT_ARC_TERMINATED
))
1107 /* Does the command match? */
1108 if ((abort
&& cmd
!= dst
->msg
[1]) ||
1109 (!abort
&& cmd
!= dst
->reply
))
1112 /* Does the addressing match? */
1113 if (msg_init
!= cec_msg_destination(dst
) &&
1114 !cec_msg_is_broadcast(dst
))
1117 /* We got a reply */
1118 memcpy(dst
->msg
, msg
->msg
, msg
->len
);
1119 dst
->len
= msg
->len
;
1120 dst
->rx_ts
= msg
->rx_ts
;
1121 dst
->rx_status
= msg
->rx_status
;
1123 dst
->rx_status
|= CEC_RX_STATUS_FEATURE_ABORT
;
1124 msg
->flags
= dst
->flags
;
1125 /* Remove it from the wait_queue */
1126 list_del_init(&data
->list
);
1128 /* Cancel the pending timeout work */
1129 if (!cancel_delayed_work(&data
->work
)) {
1130 mutex_unlock(&adap
->lock
);
1131 flush_scheduled_work();
1132 mutex_lock(&adap
->lock
);
1135 * Mark this as a reply, provided someone is still
1136 * waiting for the answer.
1140 cec_data_completed(data
);
1144 mutex_unlock(&adap
->lock
);
1146 /* Pass the message on to any monitoring filehandles */
1147 cec_queue_msg_monitor(adap
, msg
, valid_la
);
1149 /* We're done if it is not for us or a poll message */
1150 if (!valid_la
|| msg
->len
<= 1)
1153 if (adap
->log_addrs
.log_addr_mask
== 0)
1157 * Process the message on the protocol level. If is_reply is true,
1158 * then cec_receive_notify() won't pass on the reply to the listener(s)
1159 * since that was already done by cec_data_completed() above.
1161 cec_receive_notify(adap
, msg
, is_reply
);
1163 EXPORT_SYMBOL_GPL(cec_received_msg_ts
);
1165 /* Logical Address Handling */
1168 * Attempt to claim a specific logical address.
1170 * This function is called with adap->lock held.
1172 static int cec_config_log_addr(struct cec_adapter
*adap
,
1174 unsigned int log_addr
)
1176 struct cec_log_addrs
*las
= &adap
->log_addrs
;
1177 struct cec_msg msg
= { };
1180 if (cec_has_log_addr(adap
, log_addr
))
1183 /* Send poll message */
1185 msg
.msg
[0] = (log_addr
<< 4) | log_addr
;
1186 err
= cec_transmit_msg_fh(adap
, &msg
, NULL
, true);
1189 * While trying to poll the physical address was reset
1190 * and the adapter was unconfigured, so bail out.
1192 if (!adap
->is_configuring
)
1198 if (msg
.tx_status
& CEC_TX_STATUS_OK
)
1202 * Message not acknowledged, so this logical
1203 * address is free to use.
1205 err
= adap
->ops
->adap_log_addr(adap
, log_addr
);
1209 las
->log_addr
[idx
] = log_addr
;
1210 las
->log_addr_mask
|= 1 << log_addr
;
1211 adap
->phys_addrs
[log_addr
] = adap
->phys_addr
;
1216 * Unconfigure the adapter: clear all logical addresses and send
1217 * the state changed event.
1219 * This function is called with adap->lock held.
1221 static void cec_adap_unconfigure(struct cec_adapter
*adap
)
1223 if (!adap
->needs_hpd
||
1224 adap
->phys_addr
!= CEC_PHYS_ADDR_INVALID
)
1225 WARN_ON(adap
->ops
->adap_log_addr(adap
, CEC_LOG_ADDR_INVALID
));
1226 adap
->log_addrs
.log_addr_mask
= 0;
1227 adap
->is_configuring
= false;
1228 adap
->is_configured
= false;
1229 memset(adap
->phys_addrs
, 0xff, sizeof(adap
->phys_addrs
));
1231 wake_up_interruptible(&adap
->kthread_waitq
);
1232 cec_post_state_event(adap
);
1236 * Attempt to claim the required logical addresses.
1238 static int cec_config_thread_func(void *arg
)
1240 /* The various LAs for each type of device */
1241 static const u8 tv_log_addrs
[] = {
1242 CEC_LOG_ADDR_TV
, CEC_LOG_ADDR_SPECIFIC
,
1243 CEC_LOG_ADDR_INVALID
1245 static const u8 record_log_addrs
[] = {
1246 CEC_LOG_ADDR_RECORD_1
, CEC_LOG_ADDR_RECORD_2
,
1247 CEC_LOG_ADDR_RECORD_3
,
1248 CEC_LOG_ADDR_BACKUP_1
, CEC_LOG_ADDR_BACKUP_2
,
1249 CEC_LOG_ADDR_INVALID
1251 static const u8 tuner_log_addrs
[] = {
1252 CEC_LOG_ADDR_TUNER_1
, CEC_LOG_ADDR_TUNER_2
,
1253 CEC_LOG_ADDR_TUNER_3
, CEC_LOG_ADDR_TUNER_4
,
1254 CEC_LOG_ADDR_BACKUP_1
, CEC_LOG_ADDR_BACKUP_2
,
1255 CEC_LOG_ADDR_INVALID
1257 static const u8 playback_log_addrs
[] = {
1258 CEC_LOG_ADDR_PLAYBACK_1
, CEC_LOG_ADDR_PLAYBACK_2
,
1259 CEC_LOG_ADDR_PLAYBACK_3
,
1260 CEC_LOG_ADDR_BACKUP_1
, CEC_LOG_ADDR_BACKUP_2
,
1261 CEC_LOG_ADDR_INVALID
1263 static const u8 audiosystem_log_addrs
[] = {
1264 CEC_LOG_ADDR_AUDIOSYSTEM
,
1265 CEC_LOG_ADDR_INVALID
1267 static const u8 specific_use_log_addrs
[] = {
1268 CEC_LOG_ADDR_SPECIFIC
,
1269 CEC_LOG_ADDR_BACKUP_1
, CEC_LOG_ADDR_BACKUP_2
,
1270 CEC_LOG_ADDR_INVALID
1272 static const u8
*type2addrs
[6] = {
1273 [CEC_LOG_ADDR_TYPE_TV
] = tv_log_addrs
,
1274 [CEC_LOG_ADDR_TYPE_RECORD
] = record_log_addrs
,
1275 [CEC_LOG_ADDR_TYPE_TUNER
] = tuner_log_addrs
,
1276 [CEC_LOG_ADDR_TYPE_PLAYBACK
] = playback_log_addrs
,
1277 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM
] = audiosystem_log_addrs
,
1278 [CEC_LOG_ADDR_TYPE_SPECIFIC
] = specific_use_log_addrs
,
1280 static const u16 type2mask
[] = {
1281 [CEC_LOG_ADDR_TYPE_TV
] = CEC_LOG_ADDR_MASK_TV
,
1282 [CEC_LOG_ADDR_TYPE_RECORD
] = CEC_LOG_ADDR_MASK_RECORD
,
1283 [CEC_LOG_ADDR_TYPE_TUNER
] = CEC_LOG_ADDR_MASK_TUNER
,
1284 [CEC_LOG_ADDR_TYPE_PLAYBACK
] = CEC_LOG_ADDR_MASK_PLAYBACK
,
1285 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM
] = CEC_LOG_ADDR_MASK_AUDIOSYSTEM
,
1286 [CEC_LOG_ADDR_TYPE_SPECIFIC
] = CEC_LOG_ADDR_MASK_SPECIFIC
,
1288 struct cec_adapter
*adap
= arg
;
1289 struct cec_log_addrs
*las
= &adap
->log_addrs
;
1293 mutex_lock(&adap
->lock
);
1294 dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n",
1295 cec_phys_addr_exp(adap
->phys_addr
), las
->num_log_addrs
);
1296 las
->log_addr_mask
= 0;
1298 if (las
->log_addr_type
[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED
)
1301 for (i
= 0; i
< las
->num_log_addrs
; i
++) {
1302 unsigned int type
= las
->log_addr_type
[i
];
1307 * The TV functionality can only map to physical address 0.
1308 * For any other address, try the Specific functionality
1309 * instead as per the spec.
1311 if (adap
->phys_addr
&& type
== CEC_LOG_ADDR_TYPE_TV
)
1312 type
= CEC_LOG_ADDR_TYPE_SPECIFIC
;
1314 la_list
= type2addrs
[type
];
1315 last_la
= las
->log_addr
[i
];
1316 las
->log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1317 if (last_la
== CEC_LOG_ADDR_INVALID
||
1318 last_la
== CEC_LOG_ADDR_UNREGISTERED
||
1319 !((1 << last_la
) & type2mask
[type
]))
1320 last_la
= la_list
[0];
1322 err
= cec_config_log_addr(adap
, i
, last_la
);
1323 if (err
> 0) /* Reused last LA */
1329 for (j
= 0; la_list
[j
] != CEC_LOG_ADDR_INVALID
; j
++) {
1330 /* Tried this one already, skip it */
1331 if (la_list
[j
] == last_la
)
1333 /* The backup addresses are CEC 2.0 specific */
1334 if ((la_list
[j
] == CEC_LOG_ADDR_BACKUP_1
||
1335 la_list
[j
] == CEC_LOG_ADDR_BACKUP_2
) &&
1336 las
->cec_version
< CEC_OP_CEC_VERSION_2_0
)
1339 err
= cec_config_log_addr(adap
, i
, la_list
[j
]);
1340 if (err
== 0) /* LA is in use */
1344 /* Done, claimed an LA */
1348 if (la_list
[j
] == CEC_LOG_ADDR_INVALID
)
1349 dprintk(1, "could not claim LA %d\n", i
);
1352 if (adap
->log_addrs
.log_addr_mask
== 0 &&
1353 !(las
->flags
& CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK
))
1357 if (adap
->log_addrs
.log_addr_mask
== 0) {
1358 /* Fall back to unregistered */
1359 las
->log_addr
[0] = CEC_LOG_ADDR_UNREGISTERED
;
1360 las
->log_addr_mask
= 1 << las
->log_addr
[0];
1361 for (i
= 1; i
< las
->num_log_addrs
; i
++)
1362 las
->log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1364 for (i
= las
->num_log_addrs
; i
< CEC_MAX_LOG_ADDRS
; i
++)
1365 las
->log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1366 adap
->is_configured
= true;
1367 adap
->is_configuring
= false;
1368 cec_post_state_event(adap
);
1371 * Now post the Report Features and Report Physical Address broadcast
1372 * messages. Note that these are non-blocking transmits, meaning that
1373 * they are just queued up and once adap->lock is unlocked the main
1374 * thread will kick in and start transmitting these.
1376 * If after this function is done (but before one or more of these
1377 * messages are actually transmitted) the CEC adapter is unconfigured,
1378 * then any remaining messages will be dropped by the main thread.
1380 for (i
= 0; i
< las
->num_log_addrs
; i
++) {
1381 struct cec_msg msg
= {};
1383 if (las
->log_addr
[i
] == CEC_LOG_ADDR_INVALID
||
1384 (las
->flags
& CEC_LOG_ADDRS_FL_CDC_ONLY
))
1387 msg
.msg
[0] = (las
->log_addr
[i
] << 4) | 0x0f;
1389 /* Report Features must come first according to CEC 2.0 */
1390 if (las
->log_addr
[i
] != CEC_LOG_ADDR_UNREGISTERED
&&
1391 adap
->log_addrs
.cec_version
>= CEC_OP_CEC_VERSION_2_0
) {
1392 cec_fill_msg_report_features(adap
, &msg
, i
);
1393 cec_transmit_msg_fh(adap
, &msg
, NULL
, false);
1396 /* Report Physical Address */
1397 cec_msg_report_physical_addr(&msg
, adap
->phys_addr
,
1398 las
->primary_device_type
[i
]);
1399 dprintk(1, "config: la %d pa %x.%x.%x.%x\n",
1401 cec_phys_addr_exp(adap
->phys_addr
));
1402 cec_transmit_msg_fh(adap
, &msg
, NULL
, false);
1404 adap
->kthread_config
= NULL
;
1405 complete(&adap
->config_completion
);
1406 mutex_unlock(&adap
->lock
);
1410 for (i
= 0; i
< las
->num_log_addrs
; i
++)
1411 las
->log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1412 cec_adap_unconfigure(adap
);
1413 adap
->kthread_config
= NULL
;
1414 mutex_unlock(&adap
->lock
);
1415 complete(&adap
->config_completion
);
1420 * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the
1421 * logical addresses.
1423 * This function is called with adap->lock held.
1425 static void cec_claim_log_addrs(struct cec_adapter
*adap
, bool block
)
1427 if (WARN_ON(adap
->is_configuring
|| adap
->is_configured
))
1430 init_completion(&adap
->config_completion
);
1432 /* Ready to kick off the thread */
1433 adap
->is_configuring
= true;
1434 adap
->kthread_config
= kthread_run(cec_config_thread_func
, adap
,
1435 "ceccfg-%s", adap
->name
);
1436 if (IS_ERR(adap
->kthread_config
)) {
1437 adap
->kthread_config
= NULL
;
1439 mutex_unlock(&adap
->lock
);
1440 wait_for_completion(&adap
->config_completion
);
1441 mutex_lock(&adap
->lock
);
1445 /* Set a new physical address and send an event notifying userspace of this.
1447 * This function is called with adap->lock held.
1449 void __cec_s_phys_addr(struct cec_adapter
*adap
, u16 phys_addr
, bool block
)
1451 if (phys_addr
== adap
->phys_addr
)
1453 if (phys_addr
!= CEC_PHYS_ADDR_INVALID
&& adap
->devnode
.unregistered
)
1456 dprintk(1, "new physical address %x.%x.%x.%x\n",
1457 cec_phys_addr_exp(phys_addr
));
1458 if (phys_addr
== CEC_PHYS_ADDR_INVALID
||
1459 adap
->phys_addr
!= CEC_PHYS_ADDR_INVALID
) {
1460 adap
->phys_addr
= CEC_PHYS_ADDR_INVALID
;
1461 cec_post_state_event(adap
);
1462 cec_adap_unconfigure(adap
);
1463 /* Disabling monitor all mode should always succeed */
1464 if (adap
->monitor_all_cnt
)
1465 WARN_ON(call_op(adap
, adap_monitor_all_enable
, false));
1466 mutex_lock(&adap
->devnode
.lock
);
1467 if (adap
->needs_hpd
|| list_empty(&adap
->devnode
.fhs
))
1468 WARN_ON(adap
->ops
->adap_enable(adap
, false));
1469 mutex_unlock(&adap
->devnode
.lock
);
1470 if (phys_addr
== CEC_PHYS_ADDR_INVALID
)
1474 mutex_lock(&adap
->devnode
.lock
);
1475 if ((adap
->needs_hpd
|| list_empty(&adap
->devnode
.fhs
)) &&
1476 adap
->ops
->adap_enable(adap
, true)) {
1477 mutex_unlock(&adap
->devnode
.lock
);
1481 if (adap
->monitor_all_cnt
&&
1482 call_op(adap
, adap_monitor_all_enable
, true)) {
1483 if (adap
->needs_hpd
|| list_empty(&adap
->devnode
.fhs
))
1484 WARN_ON(adap
->ops
->adap_enable(adap
, false));
1485 mutex_unlock(&adap
->devnode
.lock
);
1488 mutex_unlock(&adap
->devnode
.lock
);
1490 adap
->phys_addr
= phys_addr
;
1491 cec_post_state_event(adap
);
1492 if (adap
->log_addrs
.num_log_addrs
)
1493 cec_claim_log_addrs(adap
, block
);
1496 void cec_s_phys_addr(struct cec_adapter
*adap
, u16 phys_addr
, bool block
)
1498 if (IS_ERR_OR_NULL(adap
))
1501 mutex_lock(&adap
->lock
);
1502 __cec_s_phys_addr(adap
, phys_addr
, block
);
1503 mutex_unlock(&adap
->lock
);
1505 EXPORT_SYMBOL_GPL(cec_s_phys_addr
);
1507 void cec_s_phys_addr_from_edid(struct cec_adapter
*adap
,
1508 const struct edid
*edid
)
1510 u16 pa
= CEC_PHYS_ADDR_INVALID
;
1512 if (edid
&& edid
->extensions
)
1513 pa
= cec_get_edid_phys_addr((const u8
*)edid
,
1514 EDID_LENGTH
* (edid
->extensions
+ 1), NULL
);
1515 cec_s_phys_addr(adap
, pa
, false);
1517 EXPORT_SYMBOL_GPL(cec_s_phys_addr_from_edid
);
1520 * Called from either the ioctl or a driver to set the logical addresses.
1522 * This function is called with adap->lock held.
1524 int __cec_s_log_addrs(struct cec_adapter
*adap
,
1525 struct cec_log_addrs
*log_addrs
, bool block
)
1530 if (adap
->devnode
.unregistered
)
1533 if (!log_addrs
|| log_addrs
->num_log_addrs
== 0) {
1534 cec_adap_unconfigure(adap
);
1535 adap
->log_addrs
.num_log_addrs
= 0;
1536 for (i
= 0; i
< CEC_MAX_LOG_ADDRS
; i
++)
1537 adap
->log_addrs
.log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1538 adap
->log_addrs
.osd_name
[0] = '\0';
1539 adap
->log_addrs
.vendor_id
= CEC_VENDOR_ID_NONE
;
1540 adap
->log_addrs
.cec_version
= CEC_OP_CEC_VERSION_2_0
;
1544 if (log_addrs
->flags
& CEC_LOG_ADDRS_FL_CDC_ONLY
) {
1546 * Sanitize log_addrs fields if a CDC-Only device is
1549 log_addrs
->num_log_addrs
= 1;
1550 log_addrs
->osd_name
[0] = '\0';
1551 log_addrs
->vendor_id
= CEC_VENDOR_ID_NONE
;
1552 log_addrs
->log_addr_type
[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED
;
1554 * This is just an internal convention since a CDC-Only device
1555 * doesn't have to be a switch. But switches already use
1556 * unregistered, so it makes some kind of sense to pick this
1557 * as the primary device. Since a CDC-Only device never sends
1558 * any 'normal' CEC messages this primary device type is never
1559 * sent over the CEC bus.
1561 log_addrs
->primary_device_type
[0] = CEC_OP_PRIM_DEVTYPE_SWITCH
;
1562 log_addrs
->all_device_types
[0] = 0;
1563 log_addrs
->features
[0][0] = 0;
1564 log_addrs
->features
[0][1] = 0;
1567 /* Ensure the osd name is 0-terminated */
1568 log_addrs
->osd_name
[sizeof(log_addrs
->osd_name
) - 1] = '\0';
1571 if (log_addrs
->num_log_addrs
> adap
->available_log_addrs
) {
1572 dprintk(1, "num_log_addrs > %d\n", adap
->available_log_addrs
);
1577 * Vendor ID is a 24 bit number, so check if the value is
1578 * within the correct range.
1580 if (log_addrs
->vendor_id
!= CEC_VENDOR_ID_NONE
&&
1581 (log_addrs
->vendor_id
& 0xff000000) != 0) {
1582 dprintk(1, "invalid vendor ID\n");
1586 if (log_addrs
->cec_version
!= CEC_OP_CEC_VERSION_1_4
&&
1587 log_addrs
->cec_version
!= CEC_OP_CEC_VERSION_2_0
) {
1588 dprintk(1, "invalid CEC version\n");
1592 if (log_addrs
->num_log_addrs
> 1)
1593 for (i
= 0; i
< log_addrs
->num_log_addrs
; i
++)
1594 if (log_addrs
->log_addr_type
[i
] ==
1595 CEC_LOG_ADDR_TYPE_UNREGISTERED
) {
1596 dprintk(1, "num_log_addrs > 1 can't be combined with unregistered LA\n");
1600 for (i
= 0; i
< log_addrs
->num_log_addrs
; i
++) {
1601 const u8 feature_sz
= ARRAY_SIZE(log_addrs
->features
[0]);
1602 u8
*features
= log_addrs
->features
[i
];
1603 bool op_is_dev_features
= false;
1606 log_addrs
->log_addr
[i
] = CEC_LOG_ADDR_INVALID
;
1607 if (type_mask
& (1 << log_addrs
->log_addr_type
[i
])) {
1608 dprintk(1, "duplicate logical address type\n");
1611 type_mask
|= 1 << log_addrs
->log_addr_type
[i
];
1612 if ((type_mask
& (1 << CEC_LOG_ADDR_TYPE_RECORD
)) &&
1613 (type_mask
& (1 << CEC_LOG_ADDR_TYPE_PLAYBACK
))) {
1614 /* Record already contains the playback functionality */
1615 dprintk(1, "invalid record + playback combination\n");
1618 if (log_addrs
->primary_device_type
[i
] >
1619 CEC_OP_PRIM_DEVTYPE_PROCESSOR
) {
1620 dprintk(1, "unknown primary device type\n");
1623 if (log_addrs
->primary_device_type
[i
] == 2) {
1624 dprintk(1, "invalid primary device type\n");
1627 if (log_addrs
->log_addr_type
[i
] > CEC_LOG_ADDR_TYPE_UNREGISTERED
) {
1628 dprintk(1, "unknown logical address type\n");
1631 for (j
= 0; j
< feature_sz
; j
++) {
1632 if ((features
[j
] & 0x80) == 0) {
1633 if (op_is_dev_features
)
1635 op_is_dev_features
= true;
1638 if (!op_is_dev_features
|| j
== feature_sz
) {
1639 dprintk(1, "malformed features\n");
1642 /* Zero unused part of the feature array */
1643 memset(features
+ j
+ 1, 0, feature_sz
- j
- 1);
1646 if (log_addrs
->cec_version
>= CEC_OP_CEC_VERSION_2_0
) {
1647 if (log_addrs
->num_log_addrs
> 2) {
1648 dprintk(1, "CEC 2.0 allows no more than 2 logical addresses\n");
1651 if (log_addrs
->num_log_addrs
== 2) {
1652 if (!(type_mask
& ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM
) |
1653 (1 << CEC_LOG_ADDR_TYPE_TV
)))) {
1654 dprintk(1, "two LAs is only allowed for audiosystem and TV\n");
1657 if (!(type_mask
& ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK
) |
1658 (1 << CEC_LOG_ADDR_TYPE_RECORD
)))) {
1659 dprintk(1, "an audiosystem/TV can only be combined with record or playback\n");
1665 /* Zero unused LAs */
1666 for (i
= log_addrs
->num_log_addrs
; i
< CEC_MAX_LOG_ADDRS
; i
++) {
1667 log_addrs
->primary_device_type
[i
] = 0;
1668 log_addrs
->log_addr_type
[i
] = 0;
1669 log_addrs
->all_device_types
[i
] = 0;
1670 memset(log_addrs
->features
[i
], 0,
1671 sizeof(log_addrs
->features
[i
]));
1674 log_addrs
->log_addr_mask
= adap
->log_addrs
.log_addr_mask
;
1675 adap
->log_addrs
= *log_addrs
;
1676 if (adap
->phys_addr
!= CEC_PHYS_ADDR_INVALID
)
1677 cec_claim_log_addrs(adap
, block
);
1681 int cec_s_log_addrs(struct cec_adapter
*adap
,
1682 struct cec_log_addrs
*log_addrs
, bool block
)
1686 mutex_lock(&adap
->lock
);
1687 err
= __cec_s_log_addrs(adap
, log_addrs
, block
);
1688 mutex_unlock(&adap
->lock
);
1691 EXPORT_SYMBOL_GPL(cec_s_log_addrs
);
1693 /* High-level core CEC message handling */
1695 /* Fill in the Report Features message */
1696 static void cec_fill_msg_report_features(struct cec_adapter
*adap
,
1697 struct cec_msg
*msg
,
1698 unsigned int la_idx
)
1700 const struct cec_log_addrs
*las
= &adap
->log_addrs
;
1701 const u8
*features
= las
->features
[la_idx
];
1702 bool op_is_dev_features
= false;
1705 /* Report Features */
1706 msg
->msg
[0] = (las
->log_addr
[la_idx
] << 4) | 0x0f;
1708 msg
->msg
[1] = CEC_MSG_REPORT_FEATURES
;
1709 msg
->msg
[2] = adap
->log_addrs
.cec_version
;
1710 msg
->msg
[3] = las
->all_device_types
[la_idx
];
1712 /* Write RC Profiles first, then Device Features */
1713 for (idx
= 0; idx
< ARRAY_SIZE(las
->features
[0]); idx
++) {
1714 msg
->msg
[msg
->len
++] = features
[idx
];
1715 if ((features
[idx
] & CEC_OP_FEAT_EXT
) == 0) {
1716 if (op_is_dev_features
)
1718 op_is_dev_features
= true;
1723 /* Transmit the Feature Abort message */
1724 static int cec_feature_abort_reason(struct cec_adapter
*adap
,
1725 struct cec_msg
*msg
, u8 reason
)
1727 struct cec_msg tx_msg
= { };
1730 * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT
1733 if (msg
->msg
[1] == CEC_MSG_FEATURE_ABORT
)
1735 /* Don't Feature Abort messages from 'Unregistered' */
1736 if (cec_msg_initiator(msg
) == CEC_LOG_ADDR_UNREGISTERED
)
1738 cec_msg_set_reply_to(&tx_msg
, msg
);
1739 cec_msg_feature_abort(&tx_msg
, msg
->msg
[1], reason
);
1740 return cec_transmit_msg(adap
, &tx_msg
, false);
1743 static int cec_feature_abort(struct cec_adapter
*adap
, struct cec_msg
*msg
)
1745 return cec_feature_abort_reason(adap
, msg
,
1746 CEC_OP_ABORT_UNRECOGNIZED_OP
);
1749 static int cec_feature_refused(struct cec_adapter
*adap
, struct cec_msg
*msg
)
1751 return cec_feature_abort_reason(adap
, msg
,
1752 CEC_OP_ABORT_REFUSED
);
1756 * Called when a CEC message is received. This function will do any
1757 * necessary core processing. The is_reply bool is true if this message
1758 * is a reply to an earlier transmit.
1760 * The message is either a broadcast message or a valid directed message.
1762 static int cec_receive_notify(struct cec_adapter
*adap
, struct cec_msg
*msg
,
1765 bool is_broadcast
= cec_msg_is_broadcast(msg
);
1766 u8 dest_laddr
= cec_msg_destination(msg
);
1767 u8 init_laddr
= cec_msg_initiator(msg
);
1768 u8 devtype
= cec_log_addr2dev(adap
, dest_laddr
);
1769 int la_idx
= cec_log_addr2idx(adap
, dest_laddr
);
1770 bool from_unregistered
= init_laddr
== 0xf;
1771 struct cec_msg tx_cec_msg
= { };
1772 #ifdef CONFIG_MEDIA_CEC_RC
1776 dprintk(2, "%s: %*ph\n", __func__
, msg
->len
, msg
->msg
);
1778 /* If this is a CDC-Only device, then ignore any non-CDC messages */
1779 if (cec_is_cdc_only(&adap
->log_addrs
) &&
1780 msg
->msg
[1] != CEC_MSG_CDC_MESSAGE
)
1783 if (adap
->ops
->received
) {
1784 /* Allow drivers to process the message first */
1785 if (adap
->ops
->received(adap
, msg
) != -ENOMSG
)
1790 * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and
1791 * CEC_MSG_USER_CONTROL_RELEASED messages always have to be
1792 * handled by the CEC core, even if the passthrough mode is on.
1793 * The others are just ignored if passthrough mode is on.
1795 switch (msg
->msg
[1]) {
1796 case CEC_MSG_GET_CEC_VERSION
:
1797 case CEC_MSG_GIVE_DEVICE_VENDOR_ID
:
1799 case CEC_MSG_GIVE_DEVICE_POWER_STATUS
:
1800 case CEC_MSG_GIVE_PHYSICAL_ADDR
:
1801 case CEC_MSG_GIVE_OSD_NAME
:
1802 case CEC_MSG_GIVE_FEATURES
:
1804 * Skip processing these messages if the passthrough mode
1807 if (adap
->passthrough
)
1808 goto skip_processing
;
1809 /* Ignore if addressing is wrong */
1810 if (is_broadcast
|| from_unregistered
)
1814 case CEC_MSG_USER_CONTROL_PRESSED
:
1815 case CEC_MSG_USER_CONTROL_RELEASED
:
1816 /* Wrong addressing mode: don't process */
1817 if (is_broadcast
|| from_unregistered
)
1818 goto skip_processing
;
1821 case CEC_MSG_REPORT_PHYSICAL_ADDR
:
1823 * This message is always processed, regardless of the
1824 * passthrough setting.
1826 * Exception: don't process if wrong addressing mode.
1829 goto skip_processing
;
1836 cec_msg_set_reply_to(&tx_cec_msg
, msg
);
1838 switch (msg
->msg
[1]) {
1839 /* The following messages are processed but still passed through */
1840 case CEC_MSG_REPORT_PHYSICAL_ADDR
: {
1841 u16 pa
= (msg
->msg
[2] << 8) | msg
->msg
[3];
1843 if (!from_unregistered
)
1844 adap
->phys_addrs
[init_laddr
] = pa
;
1845 dprintk(1, "reported physical address %x.%x.%x.%x for logical address %d\n",
1846 cec_phys_addr_exp(pa
), init_laddr
);
1850 case CEC_MSG_USER_CONTROL_PRESSED
:
1851 if (!(adap
->capabilities
& CEC_CAP_RC
) ||
1852 !(adap
->log_addrs
.flags
& CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU
))
1855 #ifdef CONFIG_MEDIA_CEC_RC
1856 switch (msg
->msg
[2]) {
1858 * Play function, this message can have variable length
1859 * depending on the specific play function that is used.
1863 scancode
= msg
->msg
[2];
1865 scancode
= msg
->msg
[2] << 8 | msg
->msg
[3];
1868 * Other function messages that are not handled.
1869 * Currently the RC framework does not allow to supply an
1870 * additional parameter to a keypress. These "keys" contain
1871 * other information such as channel number, an input number
1873 * For the time being these messages are not processed by the
1874 * framework and are simply forwarded to the user space.
1876 case 0x56: case 0x57:
1877 case 0x67: case 0x68: case 0x69: case 0x6a:
1881 scancode
= msg
->msg
[2];
1885 /* Was repeating, but keypress timed out */
1886 if (adap
->rc_repeating
&& !adap
->rc
->keypressed
) {
1887 adap
->rc_repeating
= false;
1888 adap
->rc_last_scancode
= -1;
1890 /* Different keypress from last time, ends repeat mode */
1891 if (adap
->rc_last_scancode
!= scancode
) {
1893 adap
->rc_repeating
= false;
1895 /* We can't handle this scancode */
1897 adap
->rc_last_scancode
= scancode
;
1901 /* Send key press */
1902 rc_keydown(adap
->rc
, RC_PROTO_CEC
, scancode
, 0);
1904 /* When in repeating mode, we're done */
1905 if (adap
->rc_repeating
)
1909 * We are not repeating, but the new scancode is
1910 * the same as the last one, and this second key press is
1911 * within 550 ms (the 'Follower Safety Timeout') from the
1912 * previous key press, so we now enable the repeating mode.
1914 if (adap
->rc_last_scancode
== scancode
&&
1915 msg
->rx_ts
- adap
->rc_last_keypress
< 550 * NSEC_PER_MSEC
) {
1916 adap
->rc_repeating
= true;
1920 * Not in repeating mode, so avoid triggering repeat mode
1924 adap
->rc_last_scancode
= scancode
;
1925 adap
->rc_last_keypress
= msg
->rx_ts
;
1929 case CEC_MSG_USER_CONTROL_RELEASED
:
1930 if (!(adap
->capabilities
& CEC_CAP_RC
) ||
1931 !(adap
->log_addrs
.flags
& CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU
))
1933 #ifdef CONFIG_MEDIA_CEC_RC
1935 adap
->rc_repeating
= false;
1936 adap
->rc_last_scancode
= -1;
1941 * The remaining messages are only processed if the passthrough mode
1944 case CEC_MSG_GET_CEC_VERSION
:
1945 cec_msg_cec_version(&tx_cec_msg
, adap
->log_addrs
.cec_version
);
1946 return cec_transmit_msg(adap
, &tx_cec_msg
, false);
1948 case CEC_MSG_GIVE_PHYSICAL_ADDR
:
1949 /* Do nothing for CEC switches using addr 15 */
1950 if (devtype
== CEC_OP_PRIM_DEVTYPE_SWITCH
&& dest_laddr
== 15)
1952 cec_msg_report_physical_addr(&tx_cec_msg
, adap
->phys_addr
, devtype
);
1953 return cec_transmit_msg(adap
, &tx_cec_msg
, false);
1955 case CEC_MSG_GIVE_DEVICE_VENDOR_ID
:
1956 if (adap
->log_addrs
.vendor_id
== CEC_VENDOR_ID_NONE
)
1957 return cec_feature_abort(adap
, msg
);
1958 cec_msg_device_vendor_id(&tx_cec_msg
, adap
->log_addrs
.vendor_id
);
1959 return cec_transmit_msg(adap
, &tx_cec_msg
, false);
1962 /* Do nothing for CEC switches */
1963 if (devtype
== CEC_OP_PRIM_DEVTYPE_SWITCH
)
1965 return cec_feature_refused(adap
, msg
);
1967 case CEC_MSG_GIVE_OSD_NAME
: {
1968 if (adap
->log_addrs
.osd_name
[0] == 0)
1969 return cec_feature_abort(adap
, msg
);
1970 cec_msg_set_osd_name(&tx_cec_msg
, adap
->log_addrs
.osd_name
);
1971 return cec_transmit_msg(adap
, &tx_cec_msg
, false);
1974 case CEC_MSG_GIVE_FEATURES
:
1975 if (adap
->log_addrs
.cec_version
< CEC_OP_CEC_VERSION_2_0
)
1976 return cec_feature_abort(adap
, msg
);
1977 cec_fill_msg_report_features(adap
, &tx_cec_msg
, la_idx
);
1978 return cec_transmit_msg(adap
, &tx_cec_msg
, false);
1982 * Unprocessed messages are aborted if userspace isn't doing
1983 * any processing either.
1985 if (!is_broadcast
&& !is_reply
&& !adap
->follower_cnt
&&
1986 !adap
->cec_follower
&& msg
->msg
[1] != CEC_MSG_FEATURE_ABORT
)
1987 return cec_feature_abort(adap
, msg
);
1992 /* If this was a reply, then we're done, unless otherwise specified */
1993 if (is_reply
&& !(msg
->flags
& CEC_MSG_FL_REPLY_TO_FOLLOWERS
))
1997 * Send to the exclusive follower if there is one, otherwise send
2000 if (adap
->cec_follower
)
2001 cec_queue_msg_fh(adap
->cec_follower
, msg
);
2003 cec_queue_msg_followers(adap
, msg
);
2008 * Helper functions to keep track of the 'monitor all' use count.
2010 * These functions are called with adap->lock held.
2012 int cec_monitor_all_cnt_inc(struct cec_adapter
*adap
)
2016 if (adap
->monitor_all_cnt
== 0)
2017 ret
= call_op(adap
, adap_monitor_all_enable
, 1);
2019 adap
->monitor_all_cnt
++;
2023 void cec_monitor_all_cnt_dec(struct cec_adapter
*adap
)
2025 adap
->monitor_all_cnt
--;
2026 if (adap
->monitor_all_cnt
== 0)
2027 WARN_ON(call_op(adap
, adap_monitor_all_enable
, 0));
2030 #ifdef CONFIG_DEBUG_FS
2032 * Log the current state of the CEC adapter.
2033 * Very useful for debugging.
2035 int cec_adap_status(struct seq_file
*file
, void *priv
)
2037 struct cec_adapter
*adap
= dev_get_drvdata(file
->private);
2038 struct cec_data
*data
;
2040 mutex_lock(&adap
->lock
);
2041 seq_printf(file
, "configured: %d\n", adap
->is_configured
);
2042 seq_printf(file
, "configuring: %d\n", adap
->is_configuring
);
2043 seq_printf(file
, "phys_addr: %x.%x.%x.%x\n",
2044 cec_phys_addr_exp(adap
->phys_addr
));
2045 seq_printf(file
, "number of LAs: %d\n", adap
->log_addrs
.num_log_addrs
);
2046 seq_printf(file
, "LA mask: 0x%04x\n", adap
->log_addrs
.log_addr_mask
);
2047 if (adap
->cec_follower
)
2048 seq_printf(file
, "has CEC follower%s\n",
2049 adap
->passthrough
? " (in passthrough mode)" : "");
2050 if (adap
->cec_initiator
)
2051 seq_puts(file
, "has CEC initiator\n");
2052 if (adap
->monitor_all_cnt
)
2053 seq_printf(file
, "file handles in Monitor All mode: %u\n",
2054 adap
->monitor_all_cnt
);
2055 if (adap
->tx_timeouts
) {
2056 seq_printf(file
, "transmit timeouts: %u\n",
2058 adap
->tx_timeouts
= 0;
2060 data
= adap
->transmitting
;
2062 seq_printf(file
, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
2063 data
->msg
.len
, data
->msg
.msg
, data
->msg
.reply
,
2065 seq_printf(file
, "pending transmits: %u\n", adap
->transmit_queue_sz
);
2066 list_for_each_entry(data
, &adap
->transmit_queue
, list
) {
2067 seq_printf(file
, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
2068 data
->msg
.len
, data
->msg
.msg
, data
->msg
.reply
,
2071 list_for_each_entry(data
, &adap
->wait_queue
, list
) {
2072 seq_printf(file
, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
2073 data
->msg
.len
, data
->msg
.msg
, data
->msg
.reply
,
2077 call_void_op(adap
, adap_status
, file
);
2078 mutex_unlock(&adap
->lock
);