1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* 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_attempt_done(cw->adap, CEC_TX_STATUS_LOW_DRIVE);
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_attempt_done(cw->adap, cw->tx_status);
/* 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_attempt_done(cw->adap, CEC_TX_STATUS_ARB_LOST);
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 = cec_get_drvdata(adap);
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 = cec_get_drvdata(adap);
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_DEFAULTS | 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);
}
|
