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initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / staging / media / go7007 / go7007-driver.c
blobece2dd146487b5051bb22e82560b2b871750fe8d
1 /*
2 * Copyright (C) 2005-2006 Micronas USA Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License (Version 2) as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
16 */
17
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/delay.h>
21 #include <linux/sched.h>
22 #include <linux/spinlock.h>
23 #include <linux/unistd.h>
24 #include <linux/time.h>
25 #include <linux/mm.h>
26 #include <linux/vmalloc.h>
27 #include <linux/device.h>
28 #include <linux/i2c.h>
29 #include <linux/firmware.h>
30 #include <linux/mutex.h>
31 #include <linux/uaccess.h>
32 #include <linux/slab.h>
33 #include <linux/videodev2.h>
34 #include <media/tuner.h>
35 #include <media/v4l2-common.h>
36
37 #include "go7007-priv.h"
38 #include "wis-i2c.h"
39
40 /*
41 * Wait for an interrupt to be delivered from the GO7007SB and return
42 * the associated value and data.
43 *
44 * Must be called with the hw_lock held.
45 */
46 int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
47 {
48 go->interrupt_available = 0;
49 go->hpi_ops->read_interrupt(go);
50 if (wait_event_timeout(go->interrupt_waitq,
51 go->interrupt_available, 5*HZ) < 0) {
52 v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
53 return -1;
54 }
55 if (!go->interrupt_available)
56 return -1;
57 go->interrupt_available = 0;
58 *value = go->interrupt_value & 0xfffe;
59 *data = go->interrupt_data;
60 return 0;
61 }
62 EXPORT_SYMBOL(go7007_read_interrupt);
63
64 /*
65 * Read a register/address on the GO7007SB.
66 *
67 * Must be called with the hw_lock held.
68 */
69 int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
70 {
71 int count = 100;
72 u16 value;
73
74 if (go7007_write_interrupt(go, 0x0010, addr) < 0)
75 return -EIO;
76 while (count-- > 0) {
77 if (go7007_read_interrupt(go, &value, data) == 0 &&
78 value == 0xa000)
79 return 0;
80 }
81 return -EIO;
82 }
83 EXPORT_SYMBOL(go7007_read_addr);
84
85 /*
86 * Send the boot firmware to the encoder, which just wakes it up and lets
87 * us talk to the GPIO pins and on-board I2C adapter.
88 *
89 * Must be called with the hw_lock held.
90 */
91 static int go7007_load_encoder(struct go7007 *go)
92 {
93 const struct firmware *fw_entry;
94 char fw_name[] = "go7007fw.bin";
95 void *bounce;
96 int fw_len, rv = 0;
97 u16 intr_val, intr_data;
98
99 if (request_firmware(&fw_entry, fw_name, go->dev)) {
100 v4l2_err(go, "unable to load firmware from file "
101 "\"%s\"\n", fw_name);
102 return -1;
103 }
104 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
105 v4l2_err(go, "file \"%s\" does not appear to be "
106 "go7007 firmware\n", fw_name);
107 release_firmware(fw_entry);
108 return -1;
109 }
110 fw_len = fw_entry->size - 16;
111 bounce = kmalloc(fw_len, GFP_KERNEL);
112 if (bounce == NULL) {
113 v4l2_err(go, "unable to allocate %d bytes for "
114 "firmware transfer\n", fw_len);
115 release_firmware(fw_entry);
116 return -1;
117 }
118 memcpy(bounce, fw_entry->data + 16, fw_len);
119 release_firmware(fw_entry);
120 if (go7007_interface_reset(go) < 0 ||
121 go7007_send_firmware(go, bounce, fw_len) < 0 ||
122 go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
123 (intr_val & ~0x1) != 0x5a5a) {
124 v4l2_err(go, "error transferring firmware\n");
125 rv = -1;
126 }
127 kfree(bounce);
128 return rv;
129 }
130
131 MODULE_FIRMWARE("go7007fw.bin");
132
133 /*
134 * Boot the encoder and register the I2C adapter if requested. Do the
135 * minimum initialization necessary, since the board-specific code may
136 * still need to probe the board ID.
137 *
138 * Must NOT be called with the hw_lock held.
139 */
140 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
141 {
142 int ret;
143
144 mutex_lock(&go->hw_lock);
145 ret = go7007_load_encoder(go);
146 mutex_unlock(&go->hw_lock);
147 if (ret < 0)
148 return -1;
149 if (!init_i2c)
150 return 0;
151 if (go7007_i2c_init(go) < 0)
152 return -1;
153 go->i2c_adapter_online = 1;
154 return 0;
155 }
156 EXPORT_SYMBOL(go7007_boot_encoder);
157
158 /*
159 * Configure any hardware-related registers in the GO7007, such as GPIO
160 * pins and bus parameters, which are board-specific. This assumes
161 * the boot firmware has already been downloaded.
162 *
163 * Must be called with the hw_lock held.
164 */
165 static int go7007_init_encoder(struct go7007 *go)
166 {
167 if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
168 go7007_write_addr(go, 0x1000, 0x0811);
169 go7007_write_addr(go, 0x1000, 0x0c11);
170 }
171 if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
172 /* Set GPIO pin 0 to be an output (audio clock control) */
173 go7007_write_addr(go, 0x3c82, 0x0001);
174 go7007_write_addr(go, 0x3c80, 0x00fe);
175 }
176 return 0;
177 }
178
179 /*
180 * Send the boot firmware to the GO7007 and configure the registers. This
181 * is the only way to stop the encoder once it has started streaming video.
182 *
183 * Must be called with the hw_lock held.
184 */
185 int go7007_reset_encoder(struct go7007 *go)
186 {
187 if (go7007_load_encoder(go) < 0)
188 return -1;
189 return go7007_init_encoder(go);
190 }
191
192 /*
193 * Attempt to instantiate an I2C client by ID, probably loading a module.
194 */
195 static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
196 int addr)
197 {
198 struct go7007 *go = i2c_get_adapdata(adapter);
199 struct v4l2_device *v4l2_dev = &go->v4l2_dev;
200
201 if (v4l2_i2c_new_subdev(v4l2_dev, adapter, type, addr, NULL))
202 return 0;
203
204 printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", type);
205 return -1;
206 }
207
208 /*
209 * Finalize the GO7007 hardware setup, register the on-board I2C adapter
210 * (if used on this board), load the I2C client driver for the sensor
211 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
212 * interfaces.
213 *
214 * Must NOT be called with the hw_lock held.
215 */
216 int go7007_register_encoder(struct go7007 *go)
217 {
218 int i, ret;
219
220 printk(KERN_INFO "go7007: registering new %s\n", go->name);
221
222 mutex_lock(&go->hw_lock);
223 ret = go7007_init_encoder(go);
224 mutex_unlock(&go->hw_lock);
225 if (ret < 0)
226 return -1;
227
228 /* v4l2 init must happen before i2c subdevs */
229 ret = go7007_v4l2_init(go);
230 if (ret < 0)
231 return ret;
232
233 if (!go->i2c_adapter_online &&
234 go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
235 if (go7007_i2c_init(go) < 0)
236 return -1;
237 go->i2c_adapter_online = 1;
238 }
239 if (go->i2c_adapter_online) {
240 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
241 init_i2c_module(&go->i2c_adapter,
242 go->board_info->i2c_devs[i].type,
243 go->board_info->i2c_devs[i].addr);
244 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
245 i2c_clients_command(&go->i2c_adapter,
246 DECODER_SET_CHANNEL, &go->channel_number);
247 }
248 if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
249 go->audio_enabled = 1;
250 go7007_snd_init(go);
251 }
252 return 0;
253 }
254 EXPORT_SYMBOL(go7007_register_encoder);
255
256 /*
257 * Send the encode firmware to the encoder, which will cause it
258 * to immediately start delivering the video and audio streams.
259 *
260 * Must be called with the hw_lock held.
261 */
262 int go7007_start_encoder(struct go7007 *go)
263 {
264 u8 *fw;
265 int fw_len, rv = 0, i;
266 u16 intr_val, intr_data;
267
268 go->modet_enable = 0;
269 if (!go->dvd_mode)
270 for (i = 0; i < 4; ++i) {
271 if (go->modet[i].enable) {
272 go->modet_enable = 1;
273 continue;
274 }
275 go->modet[i].pixel_threshold = 32767;
276 go->modet[i].motion_threshold = 32767;
277 go->modet[i].mb_threshold = 32767;
278 }
279
280 if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
281 return -1;
282
283 if (go7007_send_firmware(go, fw, fw_len) < 0 ||
284 go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
285 v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
286 rv = -1;
287 goto start_error;
288 }
289
290 go->state = STATE_DATA;
291 go->parse_length = 0;
292 go->seen_frame = 0;
293 if (go7007_stream_start(go) < 0) {
294 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
295 rv = -1;
296 goto start_error;
297 }
298
299 start_error:
300 kfree(fw);
301 return rv;
302 }
303
304 /*
305 * Store a byte in the current video buffer, if there is one.
306 */
307 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
308 {
309 if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
310 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
311 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
312
313 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
314 ++gobuf->offset;
315 ++gobuf->bytesused;
316 }
317 }
318
319 /*
320 * Deliver the last video buffer and get a new one to start writing to.
321 */
322 static void frame_boundary(struct go7007 *go)
323 {
324 struct go7007_buffer *gobuf;
325 int i;
326
327 if (go->active_buf) {
328 if (go->active_buf->modet_active) {
329 if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
330 for (i = 0; i < 216; ++i)
331 store_byte(go->active_buf,
332 go->active_map[i]);
333 go->active_buf->bytesused -= 216;
334 } else
335 go->active_buf->modet_active = 0;
336 }
337 go->active_buf->state = BUF_STATE_DONE;
338 wake_up_interruptible(&go->frame_waitq);
339 go->active_buf = NULL;
340 }
341 list_for_each_entry(gobuf, &go->stream, stream)
342 if (gobuf->state == BUF_STATE_QUEUED) {
343 gobuf->seq = go->next_seq;
344 do_gettimeofday(&gobuf->timestamp);
345 go->active_buf = gobuf;
346 break;
347 }
348 ++go->next_seq;
349 }
350
351 static void write_bitmap_word(struct go7007 *go)
352 {
353 int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
354
355 for (i = 0; i < 16; ++i) {
356 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
357 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
358 if (stride * y + (x >> 3) < sizeof(go->active_map))
359 go->active_map[stride * y + (x >> 3)] |=
360 (go->modet_word & 1) << (x & 0x7);
361 go->modet_word >>= 1;
362 }
363 }
364
365 /*
366 * Parse a chunk of the video stream into frames. The frames are not
367 * delimited by the hardware, so we have to parse the frame boundaries
368 * based on the type of video stream we're receiving.
369 */
370 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
371 {
372 int i, seq_start_code = -1, frame_start_code = -1;
373
374 spin_lock(&go->spinlock);
375
376 switch (go->format) {
377 case GO7007_FORMAT_MPEG4:
378 seq_start_code = 0xB0;
379 frame_start_code = 0xB6;
380 break;
381 case GO7007_FORMAT_MPEG1:
382 case GO7007_FORMAT_MPEG2:
383 seq_start_code = 0xB3;
384 frame_start_code = 0x00;
385 break;
386 }
387
388 for (i = 0; i < length; ++i) {
389 if (go->active_buf != NULL &&
390 go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
391 v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
392 go->active_buf->offset -= go->active_buf->bytesused;
393 go->active_buf->bytesused = 0;
394 go->active_buf->modet_active = 0;
395 go->active_buf = NULL;
396 }
397
398 switch (go->state) {
399 case STATE_DATA:
400 switch (buf[i]) {
401 case 0x00:
402 go->state = STATE_00;
403 break;
404 case 0xFF:
405 go->state = STATE_FF;
406 break;
407 default:
408 store_byte(go->active_buf, buf[i]);
409 break;
410 }
411 break;
412 case STATE_00:
413 switch (buf[i]) {
414 case 0x00:
415 go->state = STATE_00_00;
416 break;
417 case 0xFF:
418 store_byte(go->active_buf, 0x00);
419 go->state = STATE_FF;
420 break;
421 default:
422 store_byte(go->active_buf, 0x00);
423 store_byte(go->active_buf, buf[i]);
424 go->state = STATE_DATA;
425 break;
426 }
427 break;
428 case STATE_00_00:
429 switch (buf[i]) {
430 case 0x00:
431 store_byte(go->active_buf, 0x00);
432 /* go->state remains STATE_00_00 */
433 break;
434 case 0x01:
435 go->state = STATE_00_00_01;
436 break;
437 case 0xFF:
438 store_byte(go->active_buf, 0x00);
439 store_byte(go->active_buf, 0x00);
440 go->state = STATE_FF;
441 break;
442 default:
443 store_byte(go->active_buf, 0x00);
444 store_byte(go->active_buf, 0x00);
445 store_byte(go->active_buf, buf[i]);
446 go->state = STATE_DATA;
447 break;
448 }
449 break;
450 case STATE_00_00_01:
451 if (buf[i] == 0xF8 && go->modet_enable == 0) {
452 /* MODET start code, but MODET not enabled */
453 store_byte(go->active_buf, 0x00);
454 store_byte(go->active_buf, 0x00);
455 store_byte(go->active_buf, 0x01);
456 store_byte(go->active_buf, 0xF8);
457 go->state = STATE_DATA;
458 break;
459 }
460 /* If this is the start of a new MPEG frame,
461 * get a new buffer */
462 if ((go->format == GO7007_FORMAT_MPEG1 ||
463 go->format == GO7007_FORMAT_MPEG2 ||
464 go->format == GO7007_FORMAT_MPEG4) &&
465 (buf[i] == seq_start_code ||
466 buf[i] == 0xB8 || /* GOP code */
467 buf[i] == frame_start_code)) {
468 if (go->active_buf == NULL || go->seen_frame)
469 frame_boundary(go);
470 if (buf[i] == frame_start_code) {
471 if (go->active_buf != NULL)
472 go->active_buf->frame_offset =
473 go->active_buf->offset;
474 go->seen_frame = 1;
475 } else {
476 go->seen_frame = 0;
477 }
478 }
479 /* Handle any special chunk types, or just write the
480 * start code to the (potentially new) buffer */
481 switch (buf[i]) {
482 case 0xF5: /* timestamp */
483 go->parse_length = 12;
484 go->state = STATE_UNPARSED;
485 break;
486 case 0xF6: /* vbi */
487 go->state = STATE_VBI_LEN_A;
488 break;
489 case 0xF8: /* MD map */
490 go->parse_length = 0;
491 memset(go->active_map, 0,
492 sizeof(go->active_map));
493 go->state = STATE_MODET_MAP;
494 break;
495 case 0xFF: /* Potential JPEG start code */
496 store_byte(go->active_buf, 0x00);
497 store_byte(go->active_buf, 0x00);
498 store_byte(go->active_buf, 0x01);
499 go->state = STATE_FF;
500 break;
501 default:
502 store_byte(go->active_buf, 0x00);
503 store_byte(go->active_buf, 0x00);
504 store_byte(go->active_buf, 0x01);
505 store_byte(go->active_buf, buf[i]);
506 go->state = STATE_DATA;
507 break;
508 }
509 break;
510 case STATE_FF:
511 switch (buf[i]) {
512 case 0x00:
513 store_byte(go->active_buf, 0xFF);
514 go->state = STATE_00;
515 break;
516 case 0xFF:
517 store_byte(go->active_buf, 0xFF);
518 /* go->state remains STATE_FF */
519 break;
520 case 0xD8:
521 if (go->format == GO7007_FORMAT_MJPEG)
522 frame_boundary(go);
523 /* fall through */
524 default:
525 store_byte(go->active_buf, 0xFF);
526 store_byte(go->active_buf, buf[i]);
527 go->state = STATE_DATA;
528 break;
529 }
530 break;
531 case STATE_VBI_LEN_A:
532 go->parse_length = buf[i] << 8;
533 go->state = STATE_VBI_LEN_B;
534 break;
535 case STATE_VBI_LEN_B:
536 go->parse_length |= buf[i];
537 if (go->parse_length > 0)
538 go->state = STATE_UNPARSED;
539 else
540 go->state = STATE_DATA;
541 break;
542 case STATE_MODET_MAP:
543 if (go->parse_length < 204) {
544 if (go->parse_length & 1) {
545 go->modet_word |= buf[i];
546 write_bitmap_word(go);
547 } else
548 go->modet_word = buf[i] << 8;
549 } else if (go->parse_length == 207 && go->active_buf) {
550 go->active_buf->modet_active = buf[i];
551 }
552 if (++go->parse_length == 208)
553 go->state = STATE_DATA;
554 break;
555 case STATE_UNPARSED:
556 if (--go->parse_length == 0)
557 go->state = STATE_DATA;
558 break;
559 }
560 }
561
562 spin_unlock(&go->spinlock);
563 }
564 EXPORT_SYMBOL(go7007_parse_video_stream);
565
566 /*
567 * Allocate a new go7007 struct. Used by the hardware-specific probe.
568 */
569 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
570 {
571 struct go7007 *go;
572 int i;
573
574 go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
575 if (go == NULL)
576 return NULL;
577 go->dev = dev;
578 go->board_info = board;
579 go->board_id = 0;
580 go->tuner_type = -1;
581 go->channel_number = 0;
582 go->name[0] = 0;
583 mutex_init(&go->hw_lock);
584 init_waitqueue_head(&go->frame_waitq);
585 spin_lock_init(&go->spinlock);
586 go->video_dev = NULL;
587 go->ref_count = 0;
588 go->status = STATUS_INIT;
589 memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
590 go->i2c_adapter_online = 0;
591 go->interrupt_available = 0;
592 init_waitqueue_head(&go->interrupt_waitq);
593 go->in_use = 0;
594 go->input = 0;
595 if (board->sensor_flags & GO7007_SENSOR_TV) {
596 go->standard = GO7007_STD_NTSC;
597 go->width = 720;
598 go->height = 480;
599 go->sensor_framerate = 30000;
600 } else {
601 go->standard = GO7007_STD_OTHER;
602 go->width = board->sensor_width;
603 go->height = board->sensor_height;
604 go->sensor_framerate = board->sensor_framerate;
605 }
606 go->encoder_v_offset = board->sensor_v_offset;
607 go->encoder_h_offset = board->sensor_h_offset;
608 go->encoder_h_halve = 0;
609 go->encoder_v_halve = 0;
610 go->encoder_subsample = 0;
611 go->streaming = 0;
612 go->format = GO7007_FORMAT_MJPEG;
613 go->bitrate = 1500000;
614 go->fps_scale = 1;
615 go->pali = 0;
616 go->aspect_ratio = GO7007_RATIO_1_1;
617 go->gop_size = 0;
618 go->ipb = 0;
619 go->closed_gop = 0;
620 go->repeat_seqhead = 0;
621 go->seq_header_enable = 0;
622 go->gop_header_enable = 0;
623 go->dvd_mode = 0;
624 go->interlace_coding = 0;
625 for (i = 0; i < 4; ++i)
626 go->modet[i].enable = 0;
627 for (i = 0; i < 1624; ++i)
628 go->modet_map[i] = 0;
629 go->audio_deliver = NULL;
630 go->audio_enabled = 0;
631 INIT_LIST_HEAD(&go->stream);
632
633 return go;
634 }
635 EXPORT_SYMBOL(go7007_alloc);
636
637 /*
638 * Detach and unregister the encoder. The go7007 struct won't be freed
639 * until v4l2 finishes releasing its resources and all associated fds are
640 * closed by applications.
641 */
642 void go7007_remove(struct go7007 *go)
643 {
644 if (go->i2c_adapter_online) {
645 if (i2c_del_adapter(&go->i2c_adapter) == 0)
646 go->i2c_adapter_online = 0;
647 else
648 v4l2_err(&go->v4l2_dev,
649 "error removing I2C adapter!\n");
650 }
651
652 if (go->audio_enabled)
653 go7007_snd_remove(go);
654 go7007_v4l2_remove(go);
655 }
656 EXPORT_SYMBOL(go7007_remove);
657
658 MODULE_LICENSE("GPL v2");
Linux ARM platform port for MOXA ART SoC