231 lines
6.4 KiB
C
231 lines
6.4 KiB
C
/*
|
|
* vivid-cec.c - A Virtual Video Test Driver, cec emulation
|
|
*
|
|
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
|
|
*
|
|
* This program is free software; you may redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <media/cec.h>
|
|
|
|
#include "vivid-core.h"
|
|
#include "vivid-cec.h"
|
|
|
|
void vivid_cec_bus_free_work(struct vivid_dev *dev)
|
|
{
|
|
spin_lock(&dev->cec_slock);
|
|
while (!list_empty(&dev->cec_work_list)) {
|
|
struct vivid_cec_work *cw =
|
|
list_first_entry(&dev->cec_work_list,
|
|
struct vivid_cec_work, list);
|
|
|
|
spin_unlock(&dev->cec_slock);
|
|
cancel_delayed_work_sync(&cw->work);
|
|
spin_lock(&dev->cec_slock);
|
|
list_del(&cw->list);
|
|
cec_transmit_done(cw->adap, CEC_TX_STATUS_LOW_DRIVE, 0, 0, 1, 0);
|
|
kfree(cw);
|
|
}
|
|
spin_unlock(&dev->cec_slock);
|
|
}
|
|
|
|
static bool vivid_cec_find_dest_adap(struct vivid_dev *dev,
|
|
struct cec_adapter *adap, u8 dest)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (dest >= 0xf)
|
|
return false;
|
|
|
|
if (adap != dev->cec_rx_adap && dev->cec_rx_adap &&
|
|
dev->cec_rx_adap->is_configured &&
|
|
cec_has_log_addr(dev->cec_rx_adap, dest))
|
|
return true;
|
|
|
|
for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++) {
|
|
if (adap == dev->cec_tx_adap[i])
|
|
continue;
|
|
if (!dev->cec_tx_adap[i]->is_configured)
|
|
continue;
|
|
if (cec_has_log_addr(dev->cec_tx_adap[i], dest))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void vivid_cec_xfer_done_worker(struct work_struct *work)
|
|
{
|
|
struct vivid_cec_work *cw =
|
|
container_of(work, struct vivid_cec_work, work.work);
|
|
struct vivid_dev *dev = cw->dev;
|
|
struct cec_adapter *adap = cw->adap;
|
|
u8 dest = cec_msg_destination(&cw->msg);
|
|
bool valid_dest;
|
|
unsigned int i;
|
|
|
|
valid_dest = cec_msg_is_broadcast(&cw->msg);
|
|
if (!valid_dest)
|
|
valid_dest = vivid_cec_find_dest_adap(dev, adap, dest);
|
|
|
|
cw->tx_status = valid_dest ? CEC_TX_STATUS_OK : CEC_TX_STATUS_NACK;
|
|
spin_lock(&dev->cec_slock);
|
|
dev->cec_xfer_time_jiffies = 0;
|
|
dev->cec_xfer_start_jiffies = 0;
|
|
list_del(&cw->list);
|
|
spin_unlock(&dev->cec_slock);
|
|
cec_transmit_done(cw->adap, cw->tx_status, 0, valid_dest ? 0 : 1, 0, 0);
|
|
|
|
/* Broadcast message */
|
|
if (adap != dev->cec_rx_adap)
|
|
cec_received_msg(dev->cec_rx_adap, &cw->msg);
|
|
for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++)
|
|
if (adap != dev->cec_tx_adap[i])
|
|
cec_received_msg(dev->cec_tx_adap[i], &cw->msg);
|
|
kfree(cw);
|
|
}
|
|
|
|
static void vivid_cec_xfer_try_worker(struct work_struct *work)
|
|
{
|
|
struct vivid_cec_work *cw =
|
|
container_of(work, struct vivid_cec_work, work.work);
|
|
struct vivid_dev *dev = cw->dev;
|
|
|
|
spin_lock(&dev->cec_slock);
|
|
if (dev->cec_xfer_time_jiffies) {
|
|
list_del(&cw->list);
|
|
spin_unlock(&dev->cec_slock);
|
|
cec_transmit_done(cw->adap, CEC_TX_STATUS_ARB_LOST, 1, 0, 0, 0);
|
|
kfree(cw);
|
|
} else {
|
|
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
|
|
dev->cec_xfer_start_jiffies = jiffies;
|
|
dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
|
|
spin_unlock(&dev->cec_slock);
|
|
schedule_delayed_work(&cw->work, dev->cec_xfer_time_jiffies);
|
|
}
|
|
}
|
|
|
|
static int vivid_cec_adap_enable(struct cec_adapter *adap, bool enable)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int vivid_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* One data bit takes 2400 us, each byte needs 10 bits so that's 24000 us
|
|
* per byte.
|
|
*/
|
|
#define USECS_PER_BYTE 24000
|
|
|
|
static int vivid_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
|
|
u32 signal_free_time, struct cec_msg *msg)
|
|
{
|
|
struct vivid_dev *dev = adap->priv;
|
|
struct vivid_cec_work *cw = kzalloc(sizeof(*cw), GFP_KERNEL);
|
|
long delta_jiffies = 0;
|
|
|
|
if (cw == NULL)
|
|
return -ENOMEM;
|
|
cw->dev = dev;
|
|
cw->adap = adap;
|
|
cw->usecs = CEC_FREE_TIME_TO_USEC(signal_free_time) +
|
|
msg->len * USECS_PER_BYTE;
|
|
cw->msg = *msg;
|
|
|
|
spin_lock(&dev->cec_slock);
|
|
list_add(&cw->list, &dev->cec_work_list);
|
|
if (dev->cec_xfer_time_jiffies == 0) {
|
|
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
|
|
dev->cec_xfer_start_jiffies = jiffies;
|
|
dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
|
|
delta_jiffies = dev->cec_xfer_time_jiffies;
|
|
} else {
|
|
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_try_worker);
|
|
delta_jiffies = dev->cec_xfer_start_jiffies +
|
|
dev->cec_xfer_time_jiffies - jiffies;
|
|
}
|
|
spin_unlock(&dev->cec_slock);
|
|
schedule_delayed_work(&cw->work, delta_jiffies < 0 ? 0 : delta_jiffies);
|
|
return 0;
|
|
}
|
|
|
|
static int vivid_received(struct cec_adapter *adap, struct cec_msg *msg)
|
|
{
|
|
struct vivid_dev *dev = adap->priv;
|
|
struct cec_msg reply;
|
|
u8 dest = cec_msg_destination(msg);
|
|
u8 disp_ctl;
|
|
char osd[14];
|
|
|
|
if (cec_msg_is_broadcast(msg))
|
|
dest = adap->log_addrs.log_addr[0];
|
|
cec_msg_init(&reply, dest, cec_msg_initiator(msg));
|
|
|
|
switch (cec_msg_opcode(msg)) {
|
|
case CEC_MSG_SET_OSD_STRING:
|
|
if (!cec_is_sink(adap))
|
|
return -ENOMSG;
|
|
cec_ops_set_osd_string(msg, &disp_ctl, osd);
|
|
switch (disp_ctl) {
|
|
case CEC_OP_DISP_CTL_DEFAULT:
|
|
strcpy(dev->osd, osd);
|
|
dev->osd_jiffies = jiffies;
|
|
break;
|
|
case CEC_OP_DISP_CTL_UNTIL_CLEARED:
|
|
strcpy(dev->osd, osd);
|
|
dev->osd_jiffies = 0;
|
|
break;
|
|
case CEC_OP_DISP_CTL_CLEAR:
|
|
dev->osd[0] = 0;
|
|
dev->osd_jiffies = 0;
|
|
break;
|
|
default:
|
|
cec_msg_feature_abort(&reply, cec_msg_opcode(msg),
|
|
CEC_OP_ABORT_INVALID_OP);
|
|
cec_transmit_msg(adap, &reply, false);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
return -ENOMSG;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct cec_adap_ops vivid_cec_adap_ops = {
|
|
.adap_enable = vivid_cec_adap_enable,
|
|
.adap_log_addr = vivid_cec_adap_log_addr,
|
|
.adap_transmit = vivid_cec_adap_transmit,
|
|
.received = vivid_received,
|
|
};
|
|
|
|
struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev,
|
|
unsigned int idx,
|
|
bool is_source)
|
|
{
|
|
char name[sizeof(dev->vid_out_dev.name) + 2];
|
|
u32 caps = CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
|
|
CEC_CAP_PASSTHROUGH | CEC_CAP_RC | CEC_CAP_MONITOR_ALL;
|
|
|
|
snprintf(name, sizeof(name), "%s%d",
|
|
is_source ? dev->vid_out_dev.name : dev->vid_cap_dev.name,
|
|
idx);
|
|
return cec_allocate_adapter(&vivid_cec_adap_ops, dev,
|
|
name, caps, 1);
|
|
}
|