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20#include <media/cec.h>
21
22#include "vivid-core.h"
23#include "vivid-cec.h"
24
25void vivid_cec_bus_free_work(struct vivid_dev *dev)
26{
27 spin_lock(&dev->cec_slock);
28 while (!list_empty(&dev->cec_work_list)) {
29 struct vivid_cec_work *cw =
30 list_first_entry(&dev->cec_work_list,
31 struct vivid_cec_work, list);
32
33 spin_unlock(&dev->cec_slock);
34 cancel_delayed_work_sync(&cw->work);
35 spin_lock(&dev->cec_slock);
36 list_del(&cw->list);
37 cec_transmit_attempt_done(cw->adap, CEC_TX_STATUS_LOW_DRIVE);
38 kfree(cw);
39 }
40 spin_unlock(&dev->cec_slock);
41}
42
43static bool vivid_cec_find_dest_adap(struct vivid_dev *dev,
44 struct cec_adapter *adap, u8 dest)
45{
46 unsigned int i;
47
48 if (dest >= 0xf)
49 return false;
50
51 if (adap != dev->cec_rx_adap && dev->cec_rx_adap &&
52 dev->cec_rx_adap->is_configured &&
53 cec_has_log_addr(dev->cec_rx_adap, dest))
54 return true;
55
56 for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++) {
57 if (adap == dev->cec_tx_adap[i])
58 continue;
59 if (!dev->cec_tx_adap[i]->is_configured)
60 continue;
61 if (cec_has_log_addr(dev->cec_tx_adap[i], dest))
62 return true;
63 }
64 return false;
65}
66
67static void vivid_cec_xfer_done_worker(struct work_struct *work)
68{
69 struct vivid_cec_work *cw =
70 container_of(work, struct vivid_cec_work, work.work);
71 struct vivid_dev *dev = cw->dev;
72 struct cec_adapter *adap = cw->adap;
73 u8 dest = cec_msg_destination(&cw->msg);
74 bool valid_dest;
75 unsigned int i;
76
77 valid_dest = cec_msg_is_broadcast(&cw->msg);
78 if (!valid_dest)
79 valid_dest = vivid_cec_find_dest_adap(dev, adap, dest);
80
81 cw->tx_status = valid_dest ? CEC_TX_STATUS_OK : CEC_TX_STATUS_NACK;
82 spin_lock(&dev->cec_slock);
83 dev->cec_xfer_time_jiffies = 0;
84 dev->cec_xfer_start_jiffies = 0;
85 list_del(&cw->list);
86 spin_unlock(&dev->cec_slock);
87 cec_transmit_attempt_done(cw->adap, cw->tx_status);
88
89
90 if (adap != dev->cec_rx_adap)
91 cec_received_msg(dev->cec_rx_adap, &cw->msg);
92 for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++)
93 if (adap != dev->cec_tx_adap[i])
94 cec_received_msg(dev->cec_tx_adap[i], &cw->msg);
95 kfree(cw);
96}
97
98static void vivid_cec_xfer_try_worker(struct work_struct *work)
99{
100 struct vivid_cec_work *cw =
101 container_of(work, struct vivid_cec_work, work.work);
102 struct vivid_dev *dev = cw->dev;
103
104 spin_lock(&dev->cec_slock);
105 if (dev->cec_xfer_time_jiffies) {
106 list_del(&cw->list);
107 spin_unlock(&dev->cec_slock);
108 cec_transmit_attempt_done(cw->adap, CEC_TX_STATUS_ARB_LOST);
109 kfree(cw);
110 } else {
111 INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
112 dev->cec_xfer_start_jiffies = jiffies;
113 dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
114 spin_unlock(&dev->cec_slock);
115 schedule_delayed_work(&cw->work, dev->cec_xfer_time_jiffies);
116 }
117}
118
119static int vivid_cec_adap_enable(struct cec_adapter *adap, bool enable)
120{
121 return 0;
122}
123
124static int vivid_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
125{
126 return 0;
127}
128
129
130
131
132
133#define USECS_PER_BYTE 24000
134
135static int vivid_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
136 u32 signal_free_time, struct cec_msg *msg)
137{
138 struct vivid_dev *dev = cec_get_drvdata(adap);
139 struct vivid_cec_work *cw = kzalloc(sizeof(*cw), GFP_KERNEL);
140 long delta_jiffies = 0;
141
142 if (cw == NULL)
143 return -ENOMEM;
144 cw->dev = dev;
145 cw->adap = adap;
146 cw->usecs = CEC_FREE_TIME_TO_USEC(signal_free_time) +
147 msg->len * USECS_PER_BYTE;
148 cw->msg = *msg;
149
150 spin_lock(&dev->cec_slock);
151 list_add(&cw->list, &dev->cec_work_list);
152 if (dev->cec_xfer_time_jiffies == 0) {
153 INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
154 dev->cec_xfer_start_jiffies = jiffies;
155 dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
156 delta_jiffies = dev->cec_xfer_time_jiffies;
157 } else {
158 INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_try_worker);
159 delta_jiffies = dev->cec_xfer_start_jiffies +
160 dev->cec_xfer_time_jiffies - jiffies;
161 }
162 spin_unlock(&dev->cec_slock);
163 schedule_delayed_work(&cw->work, delta_jiffies < 0 ? 0 : delta_jiffies);
164 return 0;
165}
166
167static int vivid_received(struct cec_adapter *adap, struct cec_msg *msg)
168{
169 struct vivid_dev *dev = cec_get_drvdata(adap);
170 struct cec_msg reply;
171 u8 dest = cec_msg_destination(msg);
172 u8 disp_ctl;
173 char osd[14];
174
175 if (cec_msg_is_broadcast(msg))
176 dest = adap->log_addrs.log_addr[0];
177 cec_msg_init(&reply, dest, cec_msg_initiator(msg));
178
179 switch (cec_msg_opcode(msg)) {
180 case CEC_MSG_SET_OSD_STRING:
181 if (!cec_is_sink(adap))
182 return -ENOMSG;
183 cec_ops_set_osd_string(msg, &disp_ctl, osd);
184 switch (disp_ctl) {
185 case CEC_OP_DISP_CTL_DEFAULT:
186 strcpy(dev->osd, osd);
187 dev->osd_jiffies = jiffies;
188 break;
189 case CEC_OP_DISP_CTL_UNTIL_CLEARED:
190 strcpy(dev->osd, osd);
191 dev->osd_jiffies = 0;
192 break;
193 case CEC_OP_DISP_CTL_CLEAR:
194 dev->osd[0] = 0;
195 dev->osd_jiffies = 0;
196 break;
197 default:
198 cec_msg_feature_abort(&reply, cec_msg_opcode(msg),
199 CEC_OP_ABORT_INVALID_OP);
200 cec_transmit_msg(adap, &reply, false);
201 break;
202 }
203 break;
204 default:
205 return -ENOMSG;
206 }
207 return 0;
208}
209
210static const struct cec_adap_ops vivid_cec_adap_ops = {
211 .adap_enable = vivid_cec_adap_enable,
212 .adap_log_addr = vivid_cec_adap_log_addr,
213 .adap_transmit = vivid_cec_adap_transmit,
214 .received = vivid_received,
215};
216
217struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev,
218 unsigned int idx,
219 bool is_source)
220{
221 char name[sizeof(dev->vid_out_dev.name) + 2];
222 u32 caps = CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
223 CEC_CAP_PASSTHROUGH | CEC_CAP_RC | CEC_CAP_MONITOR_ALL;
224
225 snprintf(name, sizeof(name), "%s%d",
226 is_source ? dev->vid_out_dev.name : dev->vid_cap_dev.name,
227 idx);
228 return cec_allocate_adapter(&vivid_cec_adap_ops, dev,
229 name, caps, 1);
230}
231
