?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
powerpc/mm/4k: don't allocate larger pmd page table for 4k
[linux/fpc-iii.git] / drivers / media / usb / pulse8-cec / pulse8-cec.c
blob7c18daeb0adeb6050a0276313fcd6fd2a59c2b5e
1 /*
2 * Pulse Eight HDMI CEC driver
3 *
4 * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version of 2 of the License, or (at your
9 * option) any later version. See the file COPYING in the main directory of
10 * this archive for more details.
11 */
12
13 /*
14 * Notes:
15 *
16 * - Devices with firmware version < 2 do not store their configuration in
17 * EEPROM.
18 *
19 * - In autonomous mode, only messages from a TV will be acknowledged, even
20 * polling messages. Upon receiving a message from a TV, the dongle will
21 * respond to messages from any logical address.
22 *
23 * - In autonomous mode, the dongle will by default reply Feature Abort
24 * [Unrecognized Opcode] when it receives Give Device Vendor ID. It will
25 * however observe vendor ID's reported by other devices and possibly
26 * alter this behavior. When TV's (and TV's only) report that their vendor ID
27 * is LG (0x00e091), the dongle will itself reply that it has the same vendor
28 * ID, and it will respond to at least one vendor specific command.
29 *
30 * - In autonomous mode, the dongle is known to attempt wakeup if it receives
31 * <User Control Pressed> ["Power On"], ["Power] or ["Power Toggle"], or if it
32 * receives <Set Stream Path> with its own physical address. It also does this
33 * if it receives <Vendor Specific Command> [0x03 0x00] from an LG TV.
34 */
35
36 #include <linux/completion.h>
37 #include <linux/init.h>
38 #include <linux/interrupt.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/workqueue.h>
42 #include <linux/serio.h>
43 #include <linux/slab.h>
44 #include <linux/time.h>
45 #include <linux/delay.h>
46
47 #include <media/cec.h>
48
49 MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
50 MODULE_DESCRIPTION("Pulse Eight HDMI CEC driver");
51 MODULE_LICENSE("GPL");
52
53 static int debug;
54 static int persistent_config = 1;
55 module_param(debug, int, 0644);
56 module_param(persistent_config, int, 0644);
57 MODULE_PARM_DESC(debug, "debug level (0-1)");
58 MODULE_PARM_DESC(persistent_config, "read config from persistent memory (0-1)");
59
60 enum pulse8_msgcodes {
61 MSGCODE_NOTHING = 0,
62 MSGCODE_PING,
63 MSGCODE_TIMEOUT_ERROR,
64 MSGCODE_HIGH_ERROR,
65 MSGCODE_LOW_ERROR,
66 MSGCODE_FRAME_START,
67 MSGCODE_FRAME_DATA,
68 MSGCODE_RECEIVE_FAILED,
69 MSGCODE_COMMAND_ACCEPTED, /* 0x08 */
70 MSGCODE_COMMAND_REJECTED,
71 MSGCODE_SET_ACK_MASK,
72 MSGCODE_TRANSMIT,
73 MSGCODE_TRANSMIT_EOM,
74 MSGCODE_TRANSMIT_IDLETIME,
75 MSGCODE_TRANSMIT_ACK_POLARITY,
76 MSGCODE_TRANSMIT_LINE_TIMEOUT,
77 MSGCODE_TRANSMIT_SUCCEEDED, /* 0x10 */
78 MSGCODE_TRANSMIT_FAILED_LINE,
79 MSGCODE_TRANSMIT_FAILED_ACK,
80 MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA,
81 MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE,
82 MSGCODE_FIRMWARE_VERSION,
83 MSGCODE_START_BOOTLOADER,
84 MSGCODE_GET_BUILDDATE,
85 MSGCODE_SET_CONTROLLED, /* 0x18 */
86 MSGCODE_GET_AUTO_ENABLED,
87 MSGCODE_SET_AUTO_ENABLED,
88 MSGCODE_GET_DEFAULT_LOGICAL_ADDRESS,
89 MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS,
90 MSGCODE_GET_LOGICAL_ADDRESS_MASK,
91 MSGCODE_SET_LOGICAL_ADDRESS_MASK,
92 MSGCODE_GET_PHYSICAL_ADDRESS,
93 MSGCODE_SET_PHYSICAL_ADDRESS, /* 0x20 */
94 MSGCODE_GET_DEVICE_TYPE,
95 MSGCODE_SET_DEVICE_TYPE,
96 MSGCODE_GET_HDMI_VERSION,
97 MSGCODE_SET_HDMI_VERSION,
98 MSGCODE_GET_OSD_NAME,
99 MSGCODE_SET_OSD_NAME,
100 MSGCODE_WRITE_EEPROM,
101 MSGCODE_GET_ADAPTER_TYPE, /* 0x28 */
102 MSGCODE_SET_ACTIVE_SOURCE,
103
104 MSGCODE_FRAME_EOM = 0x80,
105 MSGCODE_FRAME_ACK = 0x40,
106 };
107
108 #define MSGSTART 0xff
109 #define MSGEND 0xfe
110 #define MSGESC 0xfd
111 #define MSGOFFSET 3
112
113 #define DATA_SIZE 256
114
115 #define PING_PERIOD (15 * HZ)
116
117 struct pulse8 {
118 struct device *dev;
119 struct serio *serio;
120 struct cec_adapter *adap;
121 unsigned int vers;
122 struct completion cmd_done;
123 struct work_struct work;
124 struct delayed_work ping_eeprom_work;
125 struct cec_msg rx_msg;
126 u8 data[DATA_SIZE];
127 unsigned int len;
128 u8 buf[DATA_SIZE];
129 unsigned int idx;
130 bool escape;
131 bool started;
132 struct mutex config_lock;
133 struct mutex write_lock;
134 bool config_pending;
135 bool restoring_config;
136 bool autonomous;
137 };
138
139 static void pulse8_ping_eeprom_work_handler(struct work_struct *work);
140
141 static void pulse8_irq_work_handler(struct work_struct *work)
142 {
143 struct pulse8 *pulse8 =
144 container_of(work, struct pulse8, work);
145
146 switch (pulse8->data[0] & 0x3f) {
147 case MSGCODE_FRAME_DATA:
148 cec_received_msg(pulse8->adap, &pulse8->rx_msg);
149 break;
150 case MSGCODE_TRANSMIT_SUCCEEDED:
151 cec_transmit_done(pulse8->adap, CEC_TX_STATUS_OK,
152 0, 0, 0, 0);
153 break;
154 case MSGCODE_TRANSMIT_FAILED_ACK:
155 cec_transmit_done(pulse8->adap, CEC_TX_STATUS_NACK,
156 0, 1, 0, 0);
157 break;
158 case MSGCODE_TRANSMIT_FAILED_LINE:
159 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
160 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
161 cec_transmit_done(pulse8->adap, CEC_TX_STATUS_ERROR,
162 0, 0, 0, 1);
163 break;
164 }
165 }
166
167 static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data,
168 unsigned int flags)
169 {
170 struct pulse8 *pulse8 = serio_get_drvdata(serio);
171
172 if (!pulse8->started && data != MSGSTART)
173 return IRQ_HANDLED;
174 if (data == MSGESC) {
175 pulse8->escape = true;
176 return IRQ_HANDLED;
177 }
178 if (pulse8->escape) {
179 data += MSGOFFSET;
180 pulse8->escape = false;
181 } else if (data == MSGEND) {
182 struct cec_msg *msg = &pulse8->rx_msg;
183
184 if (debug)
185 dev_info(pulse8->dev, "received: %*ph\n",
186 pulse8->idx, pulse8->buf);
187 pulse8->data[0] = pulse8->buf[0];
188 switch (pulse8->buf[0] & 0x3f) {
189 case MSGCODE_FRAME_START:
190 msg->len = 1;
191 msg->msg[0] = pulse8->buf[1];
192 break;
193 case MSGCODE_FRAME_DATA:
194 if (msg->len == CEC_MAX_MSG_SIZE)
195 break;
196 msg->msg[msg->len++] = pulse8->buf[1];
197 if (pulse8->buf[0] & MSGCODE_FRAME_EOM)
198 schedule_work(&pulse8->work);
199 break;
200 case MSGCODE_TRANSMIT_SUCCEEDED:
201 case MSGCODE_TRANSMIT_FAILED_LINE:
202 case MSGCODE_TRANSMIT_FAILED_ACK:
203 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
204 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
205 schedule_work(&pulse8->work);
206 break;
207 case MSGCODE_HIGH_ERROR:
208 case MSGCODE_LOW_ERROR:
209 case MSGCODE_RECEIVE_FAILED:
210 case MSGCODE_TIMEOUT_ERROR:
211 break;
212 case MSGCODE_COMMAND_ACCEPTED:
213 case MSGCODE_COMMAND_REJECTED:
214 default:
215 if (pulse8->idx == 0)
216 break;
217 memcpy(pulse8->data, pulse8->buf, pulse8->idx);
218 pulse8->len = pulse8->idx;
219 complete(&pulse8->cmd_done);
220 break;
221 }
222 pulse8->idx = 0;
223 pulse8->started = false;
224 return IRQ_HANDLED;
225 } else if (data == MSGSTART) {
226 pulse8->idx = 0;
227 pulse8->started = true;
228 return IRQ_HANDLED;
229 }
230
231 if (pulse8->idx >= DATA_SIZE) {
232 dev_dbg(pulse8->dev,
233 "throwing away %d bytes of garbage\n", pulse8->idx);
234 pulse8->idx = 0;
235 }
236 pulse8->buf[pulse8->idx++] = data;
237 return IRQ_HANDLED;
238 }
239
240 static void pulse8_disconnect(struct serio *serio)
241 {
242 struct pulse8 *pulse8 = serio_get_drvdata(serio);
243
244 cec_unregister_adapter(pulse8->adap);
245 cancel_delayed_work_sync(&pulse8->ping_eeprom_work);
246 dev_info(&serio->dev, "disconnected\n");
247 serio_close(serio);
248 serio_set_drvdata(serio, NULL);
249 kfree(pulse8);
250 }
251
252 static int pulse8_send(struct serio *serio, const u8 *command, u8 cmd_len)
253 {
254 int err = 0;
255
256 err = serio_write(serio, MSGSTART);
257 if (err)
258 return err;
259 for (; !err && cmd_len; command++, cmd_len--) {
260 if (*command >= MSGESC) {
261 err = serio_write(serio, MSGESC);
262 if (!err)
263 err = serio_write(serio, *command - MSGOFFSET);
264 } else {
265 err = serio_write(serio, *command);
266 }
267 }
268 if (!err)
269 err = serio_write(serio, MSGEND);
270
271 return err;
272 }
273
274 static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
275 const u8 *cmd, u8 cmd_len,
276 u8 response, u8 size)
277 {
278 int err;
279
280 /*dev_info(pulse8->dev, "transmit: %*ph\n", cmd_len, cmd);*/
281 init_completion(&pulse8->cmd_done);
282
283 err = pulse8_send(pulse8->serio, cmd, cmd_len);
284 if (err)
285 return err;
286
287 if (!wait_for_completion_timeout(&pulse8->cmd_done, HZ))
288 return -ETIMEDOUT;
289 if ((pulse8->data[0] & 0x3f) == MSGCODE_COMMAND_REJECTED &&
290 cmd[0] != MSGCODE_SET_CONTROLLED &&
291 cmd[0] != MSGCODE_SET_AUTO_ENABLED &&
292 cmd[0] != MSGCODE_GET_BUILDDATE)
293 return -ENOTTY;
294 if (response &&
295 ((pulse8->data[0] & 0x3f) != response || pulse8->len < size + 1)) {
296 dev_info(pulse8->dev, "transmit: failed %02x\n",
297 pulse8->data[0] & 0x3f);
298 return -EIO;
299 }
300 return 0;
301 }
302
303 static int pulse8_send_and_wait(struct pulse8 *pulse8,
304 const u8 *cmd, u8 cmd_len, u8 response, u8 size)
305 {
306 u8 cmd_sc[2];
307 int err;
308
309 mutex_lock(&pulse8->write_lock);
310 err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, response, size);
311
312 if (err == -ENOTTY) {
313 cmd_sc[0] = MSGCODE_SET_CONTROLLED;
314 cmd_sc[1] = 1;
315 err = pulse8_send_and_wait_once(pulse8, cmd_sc, 2,
316 MSGCODE_COMMAND_ACCEPTED, 1);
317 if (err)
318 goto unlock;
319 err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len,
320 response, size);
321 }
322
323 unlock:
324 mutex_unlock(&pulse8->write_lock);
325 return err == -ENOTTY ? -EIO : err;
326 }
327
328 static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
329 struct cec_log_addrs *log_addrs, u16 *pa)
330 {
331 u8 *data = pulse8->data + 1;
332 u8 cmd[2];
333 int err;
334 struct tm tm;
335 time_t date;
336
337 pulse8->vers = 0;
338
339 cmd[0] = MSGCODE_FIRMWARE_VERSION;
340 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
341 if (err)
342 return err;
343 pulse8->vers = (data[0] << 8) | data[1];
344 dev_info(pulse8->dev, "Firmware version %04x\n", pulse8->vers);
345 if (pulse8->vers < 2) {
346 *pa = CEC_PHYS_ADDR_INVALID;
347 return 0;
348 }
349
350 cmd[0] = MSGCODE_GET_BUILDDATE;
351 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 4);
352 if (err)
353 return err;
354 date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
355 time_to_tm(date, 0, &tm);
356 dev_info(pulse8->dev, "Firmware build date %04ld.%02d.%02d %02d:%02d:%02d\n",
357 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
358 tm.tm_hour, tm.tm_min, tm.tm_sec);
359
360 dev_dbg(pulse8->dev, "Persistent config:\n");
361 cmd[0] = MSGCODE_GET_AUTO_ENABLED;
362 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
363 if (err)
364 return err;
365 pulse8->autonomous = data[0];
366 dev_dbg(pulse8->dev, "Autonomous mode: %s",
367 data[0] ? "on" : "off");
368
369 cmd[0] = MSGCODE_GET_DEVICE_TYPE;
370 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
371 if (err)
372 return err;
373 log_addrs->primary_device_type[0] = data[0];
374 dev_dbg(pulse8->dev, "Primary device type: %d\n", data[0]);
375 switch (log_addrs->primary_device_type[0]) {
376 case CEC_OP_PRIM_DEVTYPE_TV:
377 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TV;
378 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TV;
379 break;
380 case CEC_OP_PRIM_DEVTYPE_RECORD:
381 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_RECORD;
382 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_RECORD;
383 break;
384 case CEC_OP_PRIM_DEVTYPE_TUNER:
385 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TUNER;
386 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TUNER;
387 break;
388 case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
389 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
390 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_PLAYBACK;
391 break;
392 case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
393 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
394 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM;
395 break;
396 case CEC_OP_PRIM_DEVTYPE_SWITCH:
397 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
398 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
399 break;
400 case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
401 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_SPECIFIC;
402 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
403 break;
404 default:
405 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
406 log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
407 dev_info(pulse8->dev, "Unknown Primary Device Type: %d\n",
408 log_addrs->primary_device_type[0]);
409 break;
410 }
411
412 cmd[0] = MSGCODE_GET_LOGICAL_ADDRESS_MASK;
413 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
414 if (err)
415 return err;
416 log_addrs->log_addr_mask = (data[0] << 8) | data[1];
417 dev_dbg(pulse8->dev, "Logical address ACK mask: %x\n",
418 log_addrs->log_addr_mask);
419 if (log_addrs->log_addr_mask)
420 log_addrs->num_log_addrs = 1;
421
422 cmd[0] = MSGCODE_GET_PHYSICAL_ADDRESS;
423 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
424 if (err)
425 return err;
426 *pa = (data[0] << 8) | data[1];
427 dev_dbg(pulse8->dev, "Physical address: %x.%x.%x.%x\n",
428 cec_phys_addr_exp(*pa));
429
430 cmd[0] = MSGCODE_GET_HDMI_VERSION;
431 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
432 if (err)
433 return err;
434 log_addrs->cec_version = data[0];
435 dev_dbg(pulse8->dev, "CEC version: %d\n", log_addrs->cec_version);
436
437 cmd[0] = MSGCODE_GET_OSD_NAME;
438 err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 0);
439 if (err)
440 return err;
441 strncpy(log_addrs->osd_name, data, 13);
442 dev_dbg(pulse8->dev, "OSD name: %s\n", log_addrs->osd_name);
443
444 return 0;
445 }
446
447 static int pulse8_apply_persistent_config(struct pulse8 *pulse8,
448 struct cec_log_addrs *log_addrs,
449 u16 pa)
450 {
451 int err;
452
453 err = cec_s_log_addrs(pulse8->adap, log_addrs, false);
454 if (err)
455 return err;
456
457 cec_s_phys_addr(pulse8->adap, pa, false);
458
459 return 0;
460 }
461
462 static int pulse8_cec_adap_enable(struct cec_adapter *adap, bool enable)
463 {
464 struct pulse8 *pulse8 = adap->priv;
465 u8 cmd[16];
466 int err;
467
468 cmd[0] = MSGCODE_SET_CONTROLLED;
469 cmd[1] = enable;
470 err = pulse8_send_and_wait(pulse8, cmd, 2,
471 MSGCODE_COMMAND_ACCEPTED, 1);
472 return enable ? err : 0;
473 }
474
475 static int pulse8_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
476 {
477 struct pulse8 *pulse8 = adap->priv;
478 u16 mask = 0;
479 u16 pa = adap->phys_addr;
480 u8 cmd[16];
481 int err = 0;
482
483 mutex_lock(&pulse8->config_lock);
484 if (log_addr != CEC_LOG_ADDR_INVALID)
485 mask = 1 << log_addr;
486 cmd[0] = MSGCODE_SET_ACK_MASK;
487 cmd[1] = mask >> 8;
488 cmd[2] = mask & 0xff;
489 err = pulse8_send_and_wait(pulse8, cmd, 3,
490 MSGCODE_COMMAND_ACCEPTED, 0);
491 if ((err && mask != 0) || pulse8->restoring_config)
492 goto unlock;
493
494 cmd[0] = MSGCODE_SET_AUTO_ENABLED;
495 cmd[1] = log_addr == CEC_LOG_ADDR_INVALID ? 0 : 1;
496 err = pulse8_send_and_wait(pulse8, cmd, 2,
497 MSGCODE_COMMAND_ACCEPTED, 0);
498 if (err)
499 goto unlock;
500 pulse8->autonomous = cmd[1];
501 if (log_addr == CEC_LOG_ADDR_INVALID)
502 goto unlock;
503
504 cmd[0] = MSGCODE_SET_DEVICE_TYPE;
505 cmd[1] = adap->log_addrs.primary_device_type[0];
506 err = pulse8_send_and_wait(pulse8, cmd, 2,
507 MSGCODE_COMMAND_ACCEPTED, 0);
508 if (err)
509 goto unlock;
510
511 switch (adap->log_addrs.primary_device_type[0]) {
512 case CEC_OP_PRIM_DEVTYPE_TV:
513 mask = CEC_LOG_ADDR_MASK_TV;
514 break;
515 case CEC_OP_PRIM_DEVTYPE_RECORD:
516 mask = CEC_LOG_ADDR_MASK_RECORD;
517 break;
518 case CEC_OP_PRIM_DEVTYPE_TUNER:
519 mask = CEC_LOG_ADDR_MASK_TUNER;
520 break;
521 case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
522 mask = CEC_LOG_ADDR_MASK_PLAYBACK;
523 break;
524 case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
525 mask = CEC_LOG_ADDR_MASK_AUDIOSYSTEM;
526 break;
527 case CEC_OP_PRIM_DEVTYPE_SWITCH:
528 mask = CEC_LOG_ADDR_MASK_UNREGISTERED;
529 break;
530 case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
531 mask = CEC_LOG_ADDR_MASK_SPECIFIC;
532 break;
533 default:
534 mask = 0;
535 break;
536 }
537 cmd[0] = MSGCODE_SET_LOGICAL_ADDRESS_MASK;
538 cmd[1] = mask >> 8;
539 cmd[2] = mask & 0xff;
540 err = pulse8_send_and_wait(pulse8, cmd, 3,
541 MSGCODE_COMMAND_ACCEPTED, 0);
542 if (err)
543 goto unlock;
544
545 cmd[0] = MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS;
546 cmd[1] = log_addr;
547 err = pulse8_send_and_wait(pulse8, cmd, 2,
548 MSGCODE_COMMAND_ACCEPTED, 0);
549 if (err)
550 goto unlock;
551
552 cmd[0] = MSGCODE_SET_PHYSICAL_ADDRESS;
553 cmd[1] = pa >> 8;
554 cmd[2] = pa & 0xff;
555 err = pulse8_send_and_wait(pulse8, cmd, 3,
556 MSGCODE_COMMAND_ACCEPTED, 0);
557 if (err)
558 goto unlock;
559
560 cmd[0] = MSGCODE_SET_HDMI_VERSION;
561 cmd[1] = adap->log_addrs.cec_version;
562 err = pulse8_send_and_wait(pulse8, cmd, 2,
563 MSGCODE_COMMAND_ACCEPTED, 0);
564 if (err)
565 goto unlock;
566
567 if (adap->log_addrs.osd_name[0]) {
568 size_t osd_len = strlen(adap->log_addrs.osd_name);
569 char *osd_str = cmd + 1;
570
571 cmd[0] = MSGCODE_SET_OSD_NAME;
572 strncpy(cmd + 1, adap->log_addrs.osd_name, 13);
573 if (osd_len < 4) {
574 memset(osd_str + osd_len, ' ', 4 - osd_len);
575 osd_len = 4;
576 osd_str[osd_len] = '\0';
577 strcpy(adap->log_addrs.osd_name, osd_str);
578 }
579 err = pulse8_send_and_wait(pulse8, cmd, 1 + osd_len,
580 MSGCODE_COMMAND_ACCEPTED, 0);
581 if (err)
582 goto unlock;
583 }
584
585 unlock:
586 if (pulse8->restoring_config)
587 pulse8->restoring_config = false;
588 else
589 pulse8->config_pending = true;
590 mutex_unlock(&pulse8->config_lock);
591 return err;
592 }
593
594 static int pulse8_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
595 u32 signal_free_time, struct cec_msg *msg)
596 {
597 struct pulse8 *pulse8 = adap->priv;
598 u8 cmd[2];
599 unsigned int i;
600 int err;
601
602 cmd[0] = MSGCODE_TRANSMIT_IDLETIME;
603 cmd[1] = signal_free_time;
604 err = pulse8_send_and_wait(pulse8, cmd, 2,
605 MSGCODE_COMMAND_ACCEPTED, 1);
606 cmd[0] = MSGCODE_TRANSMIT_ACK_POLARITY;
607 cmd[1] = cec_msg_is_broadcast(msg);
608 if (!err)
609 err = pulse8_send_and_wait(pulse8, cmd, 2,
610 MSGCODE_COMMAND_ACCEPTED, 1);
611 cmd[0] = msg->len == 1 ? MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
612 cmd[1] = msg->msg[0];
613 if (!err)
614 err = pulse8_send_and_wait(pulse8, cmd, 2,
615 MSGCODE_COMMAND_ACCEPTED, 1);
616 if (!err && msg->len > 1) {
617 cmd[0] = msg->len == 2 ? MSGCODE_TRANSMIT_EOM :
618 MSGCODE_TRANSMIT;
619 cmd[1] = msg->msg[1];
620 err = pulse8_send_and_wait(pulse8, cmd, 2,
621 MSGCODE_COMMAND_ACCEPTED, 1);
622 for (i = 0; !err && i + 2 < msg->len; i++) {
623 cmd[0] = (i + 2 == msg->len - 1) ?
624 MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
625 cmd[1] = msg->msg[i + 2];
626 err = pulse8_send_and_wait(pulse8, cmd, 2,
627 MSGCODE_COMMAND_ACCEPTED, 1);
628 }
629 }
630
631 return err;
632 }
633
634 static int pulse8_received(struct cec_adapter *adap, struct cec_msg *msg)
635 {
636 return -ENOMSG;
637 }
638
639 static const struct cec_adap_ops pulse8_cec_adap_ops = {
640 .adap_enable = pulse8_cec_adap_enable,
641 .adap_log_addr = pulse8_cec_adap_log_addr,
642 .adap_transmit = pulse8_cec_adap_transmit,
643 .received = pulse8_received,
644 };
645
646 static int pulse8_connect(struct serio *serio, struct serio_driver *drv)
647 {
648 u32 caps = CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | CEC_CAP_PHYS_ADDR |
649 CEC_CAP_PASSTHROUGH | CEC_CAP_RC | CEC_CAP_MONITOR_ALL;
650 struct pulse8 *pulse8;
651 int err = -ENOMEM;
652 struct cec_log_addrs log_addrs = {};
653 u16 pa = CEC_PHYS_ADDR_INVALID;
654
655 pulse8 = kzalloc(sizeof(*pulse8), GFP_KERNEL);
656
657 if (!pulse8)
658 return -ENOMEM;
659
660 pulse8->serio = serio;
661 pulse8->adap = cec_allocate_adapter(&pulse8_cec_adap_ops, pulse8,
662 "HDMI CEC", caps, 1);
663 err = PTR_ERR_OR_ZERO(pulse8->adap);
664 if (err < 0)
665 goto free_device;
666
667 pulse8->dev = &serio->dev;
668 serio_set_drvdata(serio, pulse8);
669 INIT_WORK(&pulse8->work, pulse8_irq_work_handler);
670 mutex_init(&pulse8->write_lock);
671 mutex_init(&pulse8->config_lock);
672 pulse8->config_pending = false;
673
674 err = serio_open(serio, drv);
675 if (err)
676 goto delete_adap;
677
678 err = pulse8_setup(pulse8, serio, &log_addrs, &pa);
679 if (err)
680 goto close_serio;
681
682 err = cec_register_adapter(pulse8->adap, &serio->dev);
683 if (err < 0)
684 goto close_serio;
685
686 pulse8->dev = &pulse8->adap->devnode.dev;
687
688 if (persistent_config && pulse8->autonomous) {
689 err = pulse8_apply_persistent_config(pulse8, &log_addrs, pa);
690 if (err)
691 goto close_serio;
692 pulse8->restoring_config = true;
693 }
694
695 INIT_DELAYED_WORK(&pulse8->ping_eeprom_work,
696 pulse8_ping_eeprom_work_handler);
697 schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
698
699 return 0;
700
701 close_serio:
702 serio_close(serio);
703 delete_adap:
704 cec_delete_adapter(pulse8->adap);
705 serio_set_drvdata(serio, NULL);
706 free_device:
707 kfree(pulse8);
708 return err;
709 }
710
711 static void pulse8_ping_eeprom_work_handler(struct work_struct *work)
712 {
713 struct pulse8 *pulse8 =
714 container_of(work, struct pulse8, ping_eeprom_work.work);
715 u8 cmd;
716
717 schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
718 cmd = MSGCODE_PING;
719 pulse8_send_and_wait(pulse8, &cmd, 1,
720 MSGCODE_COMMAND_ACCEPTED, 0);
721
722 if (pulse8->vers < 2)
723 return;
724
725 mutex_lock(&pulse8->config_lock);
726 if (pulse8->config_pending && persistent_config) {
727 dev_dbg(pulse8->dev, "writing pending config to EEPROM\n");
728 cmd = MSGCODE_WRITE_EEPROM;
729 if (pulse8_send_and_wait(pulse8, &cmd, 1,
730 MSGCODE_COMMAND_ACCEPTED, 0))
731 dev_info(pulse8->dev, "failed to write pending config to EEPROM\n");
732 else
733 pulse8->config_pending = false;
734 }
735 mutex_unlock(&pulse8->config_lock);
736 }
737
738 static struct serio_device_id pulse8_serio_ids[] = {
739 {
740 .type = SERIO_RS232,
741 .proto = SERIO_PULSE8_CEC,
742 .id = SERIO_ANY,
743 .extra = SERIO_ANY,
744 },
745 { 0 }
746 };
747
748 MODULE_DEVICE_TABLE(serio, pulse8_serio_ids);
749
750 static struct serio_driver pulse8_drv = {
751 .driver = {
752 .name = "pulse8-cec",
753 },
754 .description = "Pulse Eight HDMI CEC driver",
755 .id_table = pulse8_serio_ids,
756 .interrupt = pulse8_interrupt,
757 .connect = pulse8_connect,
758 .disconnect = pulse8_disconnect,
759 };
760
761 module_serio_driver(pulse8_drv);
Linux with added FPC-III support