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 <asm/system.h>
34 #include <linux/videodev2.h>
35 #include <media/tuner.h>
36 #include <media/v4l2-common.h>
37
38 #include "go7007-priv.h"
39 #include "wis-i2c.h"
40
41 /*
42 * Wait for an interrupt to be delivered from the GO7007SB and return
43 * the associated value and data.
44 *
45 * Must be called with the hw_lock held.
46 */
go7007_read_interrupt(struct go7007 * go,u16 * value,u16 * data)47 int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
48 {
49 go->interrupt_available = 0;
50 go->hpi_ops->read_interrupt(go);
51 if (wait_event_timeout(go->interrupt_waitq,
52 go->interrupt_available, 5*HZ) < 0) {
53 v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
54 return -1;
55 }
56 if (!go->interrupt_available)
57 return -1;
58 go->interrupt_available = 0;
59 *value = go->interrupt_value & 0xfffe;
60 *data = go->interrupt_data;
61 return 0;
62 }
63 EXPORT_SYMBOL(go7007_read_interrupt);
64
65 /*
66 * Read a register/address on the GO7007SB.
67 *
68 * Must be called with the hw_lock held.
69 */
go7007_read_addr(struct go7007 * go,u16 addr,u16 * data)70 int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
71 {
72 int count = 100;
73 u16 value;
74
75 if (go7007_write_interrupt(go, 0x0010, addr) < 0)
76 return -EIO;
77 while (count-- > 0) {
78 if (go7007_read_interrupt(go, &value, data) == 0 &&
79 value == 0xa000)
80 return 0;
81 }
82 return -EIO;
83 }
84 EXPORT_SYMBOL(go7007_read_addr);
85
86 /*
87 * Send the boot firmware to the encoder, which just wakes it up and lets
88 * us talk to the GPIO pins and on-board I2C adapter.
89 *
90 * Must be called with the hw_lock held.
91 */
go7007_load_encoder(struct go7007 * go)92 static int go7007_load_encoder(struct go7007 *go)
93 {
94 const struct firmware *fw_entry;
95 char fw_name[] = "go7007fw.bin";
96 void *bounce;
97 int fw_len, rv = 0;
98 u16 intr_val, intr_data;
99
100 if (request_firmware(&fw_entry, fw_name, go->dev)) {
101 v4l2_err(go, "unable to load firmware from file "
102 "\"%s\"\n", fw_name);
103 return -1;
104 }
105 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
106 v4l2_err(go, "file \"%s\" does not appear to be "
107 "go7007 firmware\n", fw_name);
108 release_firmware(fw_entry);
109 return -1;
110 }
111 fw_len = fw_entry->size - 16;
112 bounce = kmalloc(fw_len, GFP_KERNEL);
113 if (bounce == NULL) {
114 v4l2_err(go, "unable to allocate %d bytes for "
115 "firmware transfer\n", fw_len);
116 release_firmware(fw_entry);
117 return -1;
118 }
119 memcpy(bounce, fw_entry->data + 16, fw_len);
120 release_firmware(fw_entry);
121 if (go7007_interface_reset(go) < 0 ||
122 go7007_send_firmware(go, bounce, fw_len) < 0 ||
123 go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
124 (intr_val & ~0x1) != 0x5a5a) {
125 v4l2_err(go, "error transferring firmware\n");
126 rv = -1;
127 }
128 kfree(bounce);
129 return rv;
130 }
131
132 MODULE_FIRMWARE("go7007fw.bin");
133
134 /*
135 * Boot the encoder and register the I2C adapter if requested. Do the
136 * minimum initialization necessary, since the board-specific code may
137 * still need to probe the board ID.
138 *
139 * Must NOT be called with the hw_lock held.
140 */
go7007_boot_encoder(struct go7007 * go,int init_i2c)141 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
142 {
143 int ret;
144
145 mutex_lock(&go->hw_lock);
146 ret = go7007_load_encoder(go);
147 mutex_unlock(&go->hw_lock);
148 if (ret < 0)
149 return -1;
150 if (!init_i2c)
151 return 0;
152 if (go7007_i2c_init(go) < 0)
153 return -1;
154 go->i2c_adapter_online = 1;
155 return 0;
156 }
157 EXPORT_SYMBOL(go7007_boot_encoder);
158
159 /*
160 * Configure any hardware-related registers in the GO7007, such as GPIO
161 * pins and bus parameters, which are board-specific. This assumes
162 * the boot firmware has already been downloaded.
163 *
164 * Must be called with the hw_lock held.
165 */
go7007_init_encoder(struct go7007 * go)166 static int go7007_init_encoder(struct go7007 *go)
167 {
168 if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
169 go7007_write_addr(go, 0x1000, 0x0811);
170 go7007_write_addr(go, 0x1000, 0x0c11);
171 }
172 if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
173 /* Set GPIO pin 0 to be an output (audio clock control) */
174 go7007_write_addr(go, 0x3c82, 0x0001);
175 go7007_write_addr(go, 0x3c80, 0x00fe);
176 }
177 return 0;
178 }
179
180 /*
181 * Send the boot firmware to the GO7007 and configure the registers. This
182 * is the only way to stop the encoder once it has started streaming video.
183 *
184 * Must be called with the hw_lock held.
185 */
go7007_reset_encoder(struct go7007 * go)186 int go7007_reset_encoder(struct go7007 *go)
187 {
188 if (go7007_load_encoder(go) < 0)
189 return -1;
190 return go7007_init_encoder(go);
191 }
192
193 /*
194 * Attempt to instantiate an I2C client by ID, probably loading a module.
195 */
init_i2c_module(struct i2c_adapter * adapter,const char * type,int addr)196 static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
197 int addr)
198 {
199 struct go7007 *go = i2c_get_adapdata(adapter);
200 struct v4l2_device *v4l2_dev = &go->v4l2_dev;
201
202 if (v4l2_i2c_new_subdev(v4l2_dev, adapter, type, addr, NULL))
203 return 0;
204
205 printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", type);
206 return -1;
207 }
208
209 /*
210 * Finalize the GO7007 hardware setup, register the on-board I2C adapter
211 * (if used on this board), load the I2C client driver for the sensor
212 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
213 * interfaces.
214 *
215 * Must NOT be called with the hw_lock held.
216 */
go7007_register_encoder(struct go7007 * go)217 int go7007_register_encoder(struct go7007 *go)
218 {
219 int i, ret;
220
221 printk(KERN_INFO "go7007: registering new %s\n", go->name);
222
223 mutex_lock(&go->hw_lock);
224 ret = go7007_init_encoder(go);
225 mutex_unlock(&go->hw_lock);
226 if (ret < 0)
227 return -1;
228
229 /* v4l2 init must happen before i2c subdevs */
230 ret = go7007_v4l2_init(go);
231 if (ret < 0)
232 return ret;
233
234 if (!go->i2c_adapter_online &&
235 go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
236 if (go7007_i2c_init(go) < 0)
237 return -1;
238 go->i2c_adapter_online = 1;
239 }
240 if (go->i2c_adapter_online) {
241 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
242 init_i2c_module(&go->i2c_adapter,
243 go->board_info->i2c_devs[i].type,
244 go->board_info->i2c_devs[i].addr);
245 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
246 i2c_clients_command(&go->i2c_adapter,
247 DECODER_SET_CHANNEL, &go->channel_number);
248 }
249 if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
250 go->audio_enabled = 1;
251 go7007_snd_init(go);
252 }
253 return 0;
254 }
255 EXPORT_SYMBOL(go7007_register_encoder);
256
257 /*
258 * Send the encode firmware to the encoder, which will cause it
259 * to immediately start delivering the video and audio streams.
260 *
261 * Must be called with the hw_lock held.
262 */
go7007_start_encoder(struct go7007 * go)263 int go7007_start_encoder(struct go7007 *go)
264 {
265 u8 *fw;
266 int fw_len, rv = 0, i;
267 u16 intr_val, intr_data;
268
269 go->modet_enable = 0;
270 if (!go->dvd_mode)
271 for (i = 0; i < 4; ++i) {
272 if (go->modet[i].enable) {
273 go->modet_enable = 1;
274 continue;
275 }
276 go->modet[i].pixel_threshold = 32767;
277 go->modet[i].motion_threshold = 32767;
278 go->modet[i].mb_threshold = 32767;
279 }
280
281 if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
282 return -1;
283
284 if (go7007_send_firmware(go, fw, fw_len) < 0 ||
285 go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
286 v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
287 rv = -1;
288 goto start_error;
289 }
290
291 go->state = STATE_DATA;
292 go->parse_length = 0;
293 go->seen_frame = 0;
294 if (go7007_stream_start(go) < 0) {
295 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
296 rv = -1;
297 goto start_error;
298 }
299
300 start_error:
301 kfree(fw);
302 return rv;
303 }
304
305 /*
306 * Store a byte in the current video buffer, if there is one.
307 */
store_byte(struct go7007_buffer * gobuf,u8 byte)308 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
309 {
310 if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
311 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
312 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
313
314 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
315 ++gobuf->offset;
316 ++gobuf->bytesused;
317 }
318 }
319
320 /*
321 * Deliver the last video buffer and get a new one to start writing to.
322 */
frame_boundary(struct go7007 * go)323 static void frame_boundary(struct go7007 *go)
324 {
325 struct go7007_buffer *gobuf;
326 int i;
327
328 if (go->active_buf) {
329 if (go->active_buf->modet_active) {
330 if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
331 for (i = 0; i < 216; ++i)
332 store_byte(go->active_buf,
333 go->active_map[i]);
334 go->active_buf->bytesused -= 216;
335 } else
336 go->active_buf->modet_active = 0;
337 }
338 go->active_buf->state = BUF_STATE_DONE;
339 wake_up_interruptible(&go->frame_waitq);
340 go->active_buf = NULL;
341 }
342 list_for_each_entry(gobuf, &go->stream, stream)
343 if (gobuf->state == BUF_STATE_QUEUED) {
344 gobuf->seq = go->next_seq;
345 do_gettimeofday(&gobuf->timestamp);
346 go->active_buf = gobuf;
347 break;
348 }
349 ++go->next_seq;
350 }
351
write_bitmap_word(struct go7007 * go)352 static void write_bitmap_word(struct go7007 *go)
353 {
354 int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
355
356 for (i = 0; i < 16; ++i) {
357 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
358 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
359 if (stride * y + (x >> 3) < sizeof(go->active_map))
360 go->active_map[stride * y + (x >> 3)] |=
361 (go->modet_word & 1) << (x & 0x7);
362 go->modet_word >>= 1;
363 }
364 }
365
366 /*
367 * Parse a chunk of the video stream into frames. The frames are not
368 * delimited by the hardware, so we have to parse the frame boundaries
369 * based on the type of video stream we're receiving.
370 */
go7007_parse_video_stream(struct go7007 * go,u8 * buf,int length)371 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
372 {
373 int i, seq_start_code = -1, frame_start_code = -1;
374
375 spin_lock(&go->spinlock);
376
377 switch (go->format) {
378 case GO7007_FORMAT_MPEG4:
379 seq_start_code = 0xB0;
380 frame_start_code = 0xB6;
381 break;
382 case GO7007_FORMAT_MPEG1:
383 case GO7007_FORMAT_MPEG2:
384 seq_start_code = 0xB3;
385 frame_start_code = 0x00;
386 break;
387 }
388
389 for (i = 0; i < length; ++i) {
390 if (go->active_buf != NULL &&
391 go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
392 v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
393 go->active_buf->offset -= go->active_buf->bytesused;
394 go->active_buf->bytesused = 0;
395 go->active_buf->modet_active = 0;
396 go->active_buf = NULL;
397 }
398
399 switch (go->state) {
400 case STATE_DATA:
401 switch (buf[i]) {
402 case 0x00:
403 go->state = STATE_00;
404 break;
405 case 0xFF:
406 go->state = STATE_FF;
407 break;
408 default:
409 store_byte(go->active_buf, buf[i]);
410 break;
411 }
412 break;
413 case STATE_00:
414 switch (buf[i]) {
415 case 0x00:
416 go->state = STATE_00_00;
417 break;
418 case 0xFF:
419 store_byte(go->active_buf, 0x00);
420 go->state = STATE_FF;
421 break;
422 default:
423 store_byte(go->active_buf, 0x00);
424 store_byte(go->active_buf, buf[i]);
425 go->state = STATE_DATA;
426 break;
427 }
428 break;
429 case STATE_00_00:
430 switch (buf[i]) {
431 case 0x00:
432 store_byte(go->active_buf, 0x00);
433 /* go->state remains STATE_00_00 */
434 break;
435 case 0x01:
436 go->state = STATE_00_00_01;
437 break;
438 case 0xFF:
439 store_byte(go->active_buf, 0x00);
440 store_byte(go->active_buf, 0x00);
441 go->state = STATE_FF;
442 break;
443 default:
444 store_byte(go->active_buf, 0x00);
445 store_byte(go->active_buf, 0x00);
446 store_byte(go->active_buf, buf[i]);
447 go->state = STATE_DATA;
448 break;
449 }
450 break;
451 case STATE_00_00_01:
452 if (buf[i] == 0xF8 && go->modet_enable == 0) {
453 /* MODET start code, but MODET not enabled */
454 store_byte(go->active_buf, 0x00);
455 store_byte(go->active_buf, 0x00);
456 store_byte(go->active_buf, 0x01);
457 store_byte(go->active_buf, 0xF8);
458 go->state = STATE_DATA;
459 break;
460 }
461 /* If this is the start of a new MPEG frame,
462 * get a new buffer */
463 if ((go->format == GO7007_FORMAT_MPEG1 ||
464 go->format == GO7007_FORMAT_MPEG2 ||
465 go->format == GO7007_FORMAT_MPEG4) &&
466 (buf[i] == seq_start_code ||
467 buf[i] == 0xB8 || /* GOP code */
468 buf[i] == frame_start_code)) {
469 if (go->active_buf == NULL || go->seen_frame)
470 frame_boundary(go);
471 if (buf[i] == frame_start_code) {
472 if (go->active_buf != NULL)
473 go->active_buf->frame_offset =
474 go->active_buf->offset;
475 go->seen_frame = 1;
476 } else {
477 go->seen_frame = 0;
478 }
479 }
480 /* Handle any special chunk types, or just write the
481 * start code to the (potentially new) buffer */
482 switch (buf[i]) {
483 case 0xF5: /* timestamp */
484 go->parse_length = 12;
485 go->state = STATE_UNPARSED;
486 break;
487 case 0xF6: /* vbi */
488 go->state = STATE_VBI_LEN_A;
489 break;
490 case 0xF8: /* MD map */
491 go->parse_length = 0;
492 memset(go->active_map, 0,
493 sizeof(go->active_map));
494 go->state = STATE_MODET_MAP;
495 break;
496 case 0xFF: /* Potential JPEG start code */
497 store_byte(go->active_buf, 0x00);
498 store_byte(go->active_buf, 0x00);
499 store_byte(go->active_buf, 0x01);
500 go->state = STATE_FF;
501 break;
502 default:
503 store_byte(go->active_buf, 0x00);
504 store_byte(go->active_buf, 0x00);
505 store_byte(go->active_buf, 0x01);
506 store_byte(go->active_buf, buf[i]);
507 go->state = STATE_DATA;
508 break;
509 }
510 break;
511 case STATE_FF:
512 switch (buf[i]) {
513 case 0x00:
514 store_byte(go->active_buf, 0xFF);
515 go->state = STATE_00;
516 break;
517 case 0xFF:
518 store_byte(go->active_buf, 0xFF);
519 /* go->state remains STATE_FF */
520 break;
521 case 0xD8:
522 if (go->format == GO7007_FORMAT_MJPEG)
523 frame_boundary(go);
524 /* fall through */
525 default:
526 store_byte(go->active_buf, 0xFF);
527 store_byte(go->active_buf, buf[i]);
528 go->state = STATE_DATA;
529 break;
530 }
531 break;
532 case STATE_VBI_LEN_A:
533 go->parse_length = buf[i] << 8;
534 go->state = STATE_VBI_LEN_B;
535 break;
536 case STATE_VBI_LEN_B:
537 go->parse_length |= buf[i];
538 if (go->parse_length > 0)
539 go->state = STATE_UNPARSED;
540 else
541 go->state = STATE_DATA;
542 break;
543 case STATE_MODET_MAP:
544 if (go->parse_length < 204) {
545 if (go->parse_length & 1) {
546 go->modet_word |= buf[i];
547 write_bitmap_word(go);
548 } else
549 go->modet_word = buf[i] << 8;
550 } else if (go->parse_length == 207 && go->active_buf) {
551 go->active_buf->modet_active = buf[i];
552 }
553 if (++go->parse_length == 208)
554 go->state = STATE_DATA;
555 break;
556 case STATE_UNPARSED:
557 if (--go->parse_length == 0)
558 go->state = STATE_DATA;
559 break;
560 }
561 }
562
563 spin_unlock(&go->spinlock);
564 }
565 EXPORT_SYMBOL(go7007_parse_video_stream);
566
567 /*
568 * Allocate a new go7007 struct. Used by the hardware-specific probe.
569 */
go7007_alloc(struct go7007_board_info * board,struct device * dev)570 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
571 {
572 struct go7007 *go;
573 int i;
574
575 go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
576 if (go == NULL)
577 return NULL;
578 go->dev = dev;
579 go->board_info = board;
580 go->board_id = 0;
581 go->tuner_type = -1;
582 go->channel_number = 0;
583 go->name[0] = 0;
584 mutex_init(&go->hw_lock);
585 init_waitqueue_head(&go->frame_waitq);
586 spin_lock_init(&go->spinlock);
587 go->video_dev = NULL;
588 go->ref_count = 0;
589 go->status = STATUS_INIT;
590 memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
591 go->i2c_adapter_online = 0;
592 go->interrupt_available = 0;
593 init_waitqueue_head(&go->interrupt_waitq);
594 go->in_use = 0;
595 go->input = 0;
596 if (board->sensor_flags & GO7007_SENSOR_TV) {
597 go->standard = GO7007_STD_NTSC;
598 go->width = 720;
599 go->height = 480;
600 go->sensor_framerate = 30000;
601 } else {
602 go->standard = GO7007_STD_OTHER;
603 go->width = board->sensor_width;
604 go->height = board->sensor_height;
605 go->sensor_framerate = board->sensor_framerate;
606 }
607 go->encoder_v_offset = board->sensor_v_offset;
608 go->encoder_h_offset = board->sensor_h_offset;
609 go->encoder_h_halve = 0;
610 go->encoder_v_halve = 0;
611 go->encoder_subsample = 0;
612 go->streaming = 0;
613 go->format = GO7007_FORMAT_MJPEG;
614 go->bitrate = 1500000;
615 go->fps_scale = 1;
616 go->pali = 0;
617 go->aspect_ratio = GO7007_RATIO_1_1;
618 go->gop_size = 0;
619 go->ipb = 0;
620 go->closed_gop = 0;
621 go->repeat_seqhead = 0;
622 go->seq_header_enable = 0;
623 go->gop_header_enable = 0;
624 go->dvd_mode = 0;
625 go->interlace_coding = 0;
626 for (i = 0; i < 4; ++i)
627 go->modet[i].enable = 0;
628 for (i = 0; i < 1624; ++i)
629 go->modet_map[i] = 0;
630 go->audio_deliver = NULL;
631 go->audio_enabled = 0;
632 INIT_LIST_HEAD(&go->stream);
633
634 return go;
635 }
636 EXPORT_SYMBOL(go7007_alloc);
637
638 /*
639 * Detach and unregister the encoder. The go7007 struct won't be freed
640 * until v4l2 finishes releasing its resources and all associated fds are
641 * closed by applications.
642 */
go7007_remove(struct go7007 * go)643 void go7007_remove(struct go7007 *go)
644 {
645 if (go->i2c_adapter_online) {
646 if (i2c_del_adapter(&go->i2c_adapter) == 0)
647 go->i2c_adapter_online = 0;
648 else
649 v4l2_err(&go->v4l2_dev,
650 "error removing I2C adapter!\n");
651 }
652
653 if (go->audio_enabled)
654 go7007_snd_remove(go);
655 go7007_v4l2_remove(go);
656 }
657 EXPORT_SYMBOL(go7007_remove);
658
659 MODULE_LICENSE("GPL v2");
660