aboutsummaryrefslogtreecommitdiff
path: root/drivers/staging/go7007/go7007-driver.c
blob: b3f42f37a31381f3bc17d1e5f3bdf1c55ec94c95 (plain)
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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/unistd.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/firmware.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <asm/system.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>

#include "go7007-priv.h"
#include "wis-i2c.h"

/*
 * Wait for an interrupt to be delivered from the GO7007SB and return
 * the associated value and data.
 *
 * Must be called with the hw_lock held.
 */
int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
{
	go->interrupt_available = 0;
	go->hpi_ops->read_interrupt(go);
	if (wait_event_timeout(go->interrupt_waitq,
				go->interrupt_available, 5*HZ) < 0) {
		v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
		return -1;
	}
	if (!go->interrupt_available)
		return -1;
	go->interrupt_available = 0;
	*value = go->interrupt_value & 0xfffe;
	*data = go->interrupt_data;
	return 0;
}
EXPORT_SYMBOL(go7007_read_interrupt);

/*
 * Read a register/address on the GO7007SB.
 *
 * Must be called with the hw_lock held.
 */
int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
{
	int count = 100;
	u16 value;

	if (go7007_write_interrupt(go, 0x0010, addr) < 0)
		return -EIO;
	while (count-- > 0) {
		if (go7007_read_interrupt(go, &value, data) == 0 &&
				value == 0xa000)
			return 0;
	}
	return -EIO;
}
EXPORT_SYMBOL(go7007_read_addr);

/*
 * Send the boot firmware to the encoder, which just wakes it up and lets
 * us talk to the GPIO pins and on-board I2C adapter.
 *
 * Must be called with the hw_lock held.
 */
static int go7007_load_encoder(struct go7007 *go)
{
	const struct firmware *fw_entry;
	char fw_name[] = "go7007fw.bin";
	void *bounce;
	int fw_len, rv = 0;
	u16 intr_val, intr_data;

	if (request_firmware(&fw_entry, fw_name, go->dev)) {
		v4l2_err(go, "unable to load firmware from file "
			"\"%s\"\n", fw_name);
		return -1;
	}
	if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
		v4l2_err(go, "file \"%s\" does not appear to be "
				"go7007 firmware\n", fw_name);
		release_firmware(fw_entry);
		return -1;
	}
	fw_len = fw_entry->size - 16;
	bounce = kmalloc(fw_len, GFP_KERNEL);
	if (bounce == NULL) {
		v4l2_err(go, "unable to allocate %d bytes for "
				"firmware transfer\n", fw_len);
		release_firmware(fw_entry);
		return -1;
	}
	memcpy(bounce, fw_entry->data + 16, fw_len);
	release_firmware(fw_entry);
	if (go7007_interface_reset(go) < 0 ||
			go7007_send_firmware(go, bounce, fw_len) < 0 ||
			go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
			(intr_val & ~0x1) != 0x5a5a) {
		v4l2_err(go, "error transferring firmware\n");
		rv = -1;
	}
	kfree(bounce);
	return rv;
}

MODULE_FIRMWARE("go7007fw.bin");

/*
 * Boot the encoder and register the I2C adapter if requested.  Do the
 * minimum initialization necessary, since the board-specific code may
 * still need to probe the board ID.
 *
 * Must NOT be called with the hw_lock held.
 */
int go7007_boot_encoder(struct go7007 *go, int init_i2c)
{
	int ret;

	mutex_lock(&go->hw_lock);
	ret = go7007_load_encoder(go);
	mutex_unlock(&go->hw_lock);
	if (ret < 0)
		return -1;
	if (!init_i2c)
		return 0;
	if (go7007_i2c_init(go) < 0)
		return -1;
	go->i2c_adapter_online = 1;
	return 0;
}
EXPORT_SYMBOL(go7007_boot_encoder);

/*
 * Configure any hardware-related registers in the GO7007, such as GPIO
 * pins and bus parameters, which are board-specific.  This assumes
 * the boot firmware has already been downloaded.
 *
 * Must be called with the hw_lock held.
 */
static int go7007_init_encoder(struct go7007 *go)
{
	if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
		go7007_write_addr(go, 0x1000, 0x0811);
		go7007_write_addr(go, 0x1000, 0x0c11);
	}
	if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
		/* Set GPIO pin 0 to be an output (audio clock control) */
		go7007_write_addr(go, 0x3c82, 0x0001);
		go7007_write_addr(go, 0x3c80, 0x00fe);
	}
	return 0;
}

/*
 * Send the boot firmware to the GO7007 and configure the registers.  This
 * is the only way to stop the encoder once it has started streaming video.
 *
 * Must be called with the hw_lock held.
 */
int go7007_reset_encoder(struct go7007 *go)
{
	if (go7007_load_encoder(go) < 0)
		return -1;
	return go7007_init_encoder(go);
}

/*
 * Attempt to instantiate an I2C client by ID, probably loading a module.
 */
static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
			   int addr)
{
	struct go7007 *go = i2c_get_adapdata(adapter);
	struct v4l2_device *v4l2_dev = &go->v4l2_dev;

	if (v4l2_i2c_new_subdev(v4l2_dev, adapter, NULL, type, addr, NULL))
		return 0;

	printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", type);
	return -1;
}

/*
 * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 * (if used on this board), load the I2C client driver for the sensor
 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 * interfaces.
 *
 * Must NOT be called with the hw_lock held.
 */
int go7007_register_encoder(struct go7007 *go)
{
	int i, ret;

	printk(KERN_INFO "go7007: registering new %s\n", go->name);

	mutex_lock(&go->hw_lock);
	ret = go7007_init_encoder(go);
	mutex_unlock(&go->hw_lock);
	if (ret < 0)
		return -1;

	/* v4l2 init must happen before i2c subdevs */
	ret = go7007_v4l2_init(go);
	if (ret < 0)
		return ret;

	if (!go->i2c_adapter_online &&
			go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
		if (go7007_i2c_init(go) < 0)
			return -1;
		go->i2c_adapter_online = 1;
	}
	if (go->i2c_adapter_online) {
		for (i = 0; i < go->board_info->num_i2c_devs; ++i)
			init_i2c_module(&go->i2c_adapter,
					go->board_info->i2c_devs[i].type,
					go->board_info->i2c_devs[i].addr);
		if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
			i2c_clients_command(&go->i2c_adapter,
				DECODER_SET_CHANNEL, &go->channel_number);
	}
	if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
		go->audio_enabled = 1;
		go7007_snd_init(go);
	}
	return 0;
}
EXPORT_SYMBOL(go7007_register_encoder);

/*
 * Send the encode firmware to the encoder, which will cause it
 * to immediately start delivering the video and audio streams.
 *
 * Must be called with the hw_lock held.
 */
int go7007_start_encoder(struct go7007 *go)
{
	u8 *fw;
	int fw_len, rv = 0, i;
	u16 intr_val, intr_data;

	go->modet_enable = 0;
	if (!go->dvd_mode)
		for (i = 0; i < 4; ++i) {
			if (go->modet[i].enable) {
				go->modet_enable = 1;
				continue;
			}
			go->modet[i].pixel_threshold = 32767;
			go->modet[i].motion_threshold = 32767;
			go->modet[i].mb_threshold = 32767;
		}

	if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
		return -1;

	if (go7007_send_firmware(go, fw, fw_len) < 0 ||
			go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
		v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
		rv = -1;
		goto start_error;
	}

	go->state = STATE_DATA;
	go->parse_length = 0;
	go->seen_frame = 0;
	if (go7007_stream_start(go) < 0) {
		v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
		rv = -1;
		goto start_error;
	}

start_error:
	kfree(fw);
	return rv;
}

/*
 * Store a byte in the current video buffer, if there is one.
 */
static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
{
	if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
		unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
		unsigned int pgoff = gobuf->offset & ~PAGE_MASK;

		*((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
		++gobuf->offset;
		++gobuf->bytesused;
	}
}

/*
 * Deliver the last video buffer and get a new one to start writing to.
 */
static void frame_boundary(struct go7007 *go)
{
	struct go7007_buffer *gobuf;
	int i;

	if (go->active_buf) {
		if (go->active_buf->modet_active) {
			if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
				for (i = 0; i < 216; ++i)
					store_byte(go->active_buf,
							go->active_map[i]);
				go->active_buf->bytesused -= 216;
			} else
				go->active_buf->modet_active = 0;
		}
		go->active_buf->state = BUF_STATE_DONE;
		wake_up_interruptible(&go->frame_waitq);
		go->active_buf = NULL;
	}
	list_for_each_entry(gobuf, &go->stream, stream)
		if (gobuf->state == BUF_STATE_QUEUED) {
			gobuf->seq = go->next_seq;
			do_gettimeofday(&gobuf->timestamp);
			go->active_buf = gobuf;
			break;
		}
	++go->next_seq;
}

static void write_bitmap_word(struct go7007 *go)
{
	int x, y, i, stride = ((go->width >> 4) + 7) >> 3;

	for (i = 0; i < 16; ++i) {
		y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
		x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
		if (stride * y + (x >> 3) < sizeof(go->active_map))
			go->active_map[stride * y + (x >> 3)] |=
					(go->modet_word & 1) << (x & 0x7);
		go->modet_word >>= 1;
	}
}

/*
 * Parse a chunk of the video stream into frames.  The frames are not
 * delimited by the hardware, so we have to parse the frame boundaries
 * based on the type of video stream we're receiving.
 */
void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
{
	int i, seq_start_code = -1, frame_start_code = -1;

	spin_lock(&go->spinlock);

	switch (go->format) {
	case GO7007_FORMAT_MPEG4:
		seq_start_code = 0xB0;
		frame_start_code = 0xB6;
		break;
	case GO7007_FORMAT_MPEG1:
	case GO7007_FORMAT_MPEG2:
		seq_start_code = 0xB3;
		frame_start_code = 0x00;
		break;
	}

	for (i = 0; i < length; ++i) {
		if (go->active_buf != NULL &&
			    go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
			v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
			go->active_buf->offset -= go->active_buf->bytesused;
			go->active_buf->bytesused = 0;
			go->active_buf->modet_active = 0;
			go->active_buf = NULL;
		}

		switch (go->state) {
		case STATE_DATA:
			switch (buf[i]) {
			case 0x00:
				go->state = STATE_00;
				break;
			case 0xFF:
				go->state = STATE_FF;
				break;
			default:
				store_byte(go->active_buf, buf[i]);
				break;
			}
			break;
		case STATE_00:
			switch (buf[i]) {
			case 0x00:
				go->state = STATE_00_00;
				break;
			case 0xFF:
				store_byte(go->active_buf, 0x00);
				go->state = STATE_FF;
				break;
			default:
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, buf[i]);
				go->state = STATE_DATA;
				break;
			}
			break;
		case STATE_00_00:
			switch (buf[i]) {
			case 0x00:
				store_byte(go->active_buf, 0x00);
				/* go->state remains STATE_00_00 */
				break;
			case 0x01:
				go->state = STATE_00_00_01;
				break;
			case 0xFF:
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x00);
				go->state = STATE_FF;
				break;
			default:
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, buf[i]);
				go->state = STATE_DATA;
				break;
			}
			break;
		case STATE_00_00_01:
			if (buf[i] == 0xF8 && go->modet_enable == 0) {
				/* MODET start code, but MODET not enabled */
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x01);
				store_byte(go->active_buf, 0xF8);
				go->state = STATE_DATA;
				break;
			}
			/* If this is the start of a new MPEG frame,
			 * get a new buffer */
			if ((go->format == GO7007_FORMAT_MPEG1 ||
					go->format == GO7007_FORMAT_MPEG2 ||
					go->format == GO7007_FORMAT_MPEG4) &&
					(buf[i] == seq_start_code ||
						buf[i] == 0xB8 || /* GOP code */
						buf[i] == frame_start_code)) {
				if (go->active_buf == NULL || go->seen_frame)
					frame_boundary(go);
				if (buf[i] == frame_start_code) {
					if (go->active_buf != NULL)
						go->active_buf->frame_offset =
							go->active_buf->offset;
					go->seen_frame = 1;
				} else {
					go->seen_frame = 0;
				}
			}
			/* Handle any special chunk types, or just write the
			 * start code to the (potentially new) buffer */
			switch (buf[i]) {
			case 0xF5: /* timestamp */
				go->parse_length = 12;
				go->state = STATE_UNPARSED;
				break;
			case 0xF6: /* vbi */
				go->state = STATE_VBI_LEN_A;
				break;
			case 0xF8: /* MD map */
				go->parse_length = 0;
				memset(go->active_map, 0,
						sizeof(go->active_map));
				go->state = STATE_MODET_MAP;
				break;
			case 0xFF: /* Potential JPEG start code */
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x01);
				go->state = STATE_FF;
				break;
			default:
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x00);
				store_byte(go->active_buf, 0x01);
				store_byte(go->active_buf, buf[i]);
				go->state = STATE_DATA;
				break;
			}
			break;
		case STATE_FF:
			switch (buf[i]) {
			case 0x00:
				store_byte(go->active_buf, 0xFF);
				go->state = STATE_00;
				break;
			case 0xFF:
				store_byte(go->active_buf, 0xFF);
				/* go->state remains STATE_FF */
				break;
			case 0xD8:
				if (go->format == GO7007_FORMAT_MJPEG)
					frame_boundary(go);
				/* fall through */
			default:
				store_byte(go->active_buf, 0xFF);
				store_byte(go->active_buf, buf[i]);
				go->state = STATE_DATA;
				break;
			}
			break;
		case STATE_VBI_LEN_A:
			go->parse_length = buf[i] << 8;
			go->state = STATE_VBI_LEN_B;
			break;
		case STATE_VBI_LEN_B:
			go->parse_length |= buf[i];
			if (go->parse_length > 0)
				go->state = STATE_UNPARSED;
			else
				go->state = STATE_DATA;
			break;
		case STATE_MODET_MAP:
			if (go->parse_length < 204) {
				if (go->parse_length & 1) {
					go->modet_word |= buf[i];
					write_bitmap_word(go);
				} else
					go->modet_word = buf[i] << 8;
			} else if (go->parse_length == 207 && go->active_buf) {
				go->active_buf->modet_active = buf[i];
			}
			if (++go->parse_length == 208)
				go->state = STATE_DATA;
			break;
		case STATE_UNPARSED:
			if (--go->parse_length == 0)
				go->state = STATE_DATA;
			break;
		}
	}

	spin_unlock(&go->spinlock);
}
EXPORT_SYMBOL(go7007_parse_video_stream);

/*
 * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 */
struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
{
	struct go7007 *go;
	int i;

	go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
	if (go == NULL)
		return NULL;
	go->dev = dev;
	go->board_info = board;
	go->board_id = 0;
	go->tuner_type = -1;
	go->channel_number = 0;
	go->name[0] = 0;
	mutex_init(&go->hw_lock);
	init_waitqueue_head(&go->frame_waitq);
	spin_lock_init(&go->spinlock);
	go->video_dev = NULL;
	go->ref_count = 0;
	go->status = STATUS_INIT;
	memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
	go->i2c_adapter_online = 0;
	go->interrupt_available = 0;
	init_waitqueue_head(&go->interrupt_waitq);
	go->in_use = 0;
	go->input = 0;
	if (board->sensor_flags & GO7007_SENSOR_TV) {
		go->standard = GO7007_STD_NTSC;
		go->width = 720;
		go->height = 480;
		go->sensor_framerate = 30000;
	} else {
		go->standard = GO7007_STD_OTHER;
		go->width = board->sensor_width;
		go->height = board->sensor_height;
		go->sensor_framerate = board->sensor_framerate;
	}
	go->encoder_v_offset = board->sensor_v_offset;
	go->encoder_h_offset = board->sensor_h_offset;
	go->encoder_h_halve = 0;
	go->encoder_v_halve = 0;
	go->encoder_subsample = 0;
	go->streaming = 0;
	go->format = GO7007_FORMAT_MJPEG;
	go->bitrate = 1500000;
	go->fps_scale = 1;
	go->pali = 0;
	go->aspect_ratio = GO7007_RATIO_1_1;
	go->gop_size = 0;
	go->ipb = 0;
	go->closed_gop = 0;
	go->repeat_seqhead = 0;
	go->seq_header_enable = 0;
	go->gop_header_enable = 0;
	go->dvd_mode = 0;
	go->interlace_coding = 0;
	for (i = 0; i < 4; ++i)
		go->modet[i].enable = 0;;
	for (i = 0; i < 1624; ++i)
		go->modet_map[i] = 0;
	go->audio_deliver = NULL;
	go->audio_enabled = 0;
	INIT_LIST_HEAD(&go->stream);

	return go;
}
EXPORT_SYMBOL(go7007_alloc);

/*
 * Detach and unregister the encoder.  The go7007 struct won't be freed
 * until v4l2 finishes releasing its resources and all associated fds are
 * closed by applications.
 */
void go7007_remove(struct go7007 *go)
{
	if (go->i2c_adapter_online) {
		if (i2c_del_adapter(&go->i2c_adapter) == 0)
			go->i2c_adapter_online = 0;
		else
			v4l2_err(&go->v4l2_dev,
				"error removing I2C adapter!\n");
	}

	if (go->audio_enabled)
		go7007_snd_remove(go);
	go7007_v4l2_remove(go);
}
EXPORT_SYMBOL(go7007_remove);

MODULE_LICENSE("GPL v2");