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debugfs: Modified default dir of debugfs for debugging UHCI.
[linux/fpc-iii.git] / drivers / staging / go7007 / go7007-driver.c
blob77b1e769ac923ce9fef7913aca17ba730d85aa60
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/semaphore.h>
31 #include <linux/uaccess.h>
32 #include <asm/system.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 printk(KERN_ERR "go7007: 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 printk(KERN_ERR
101 "go7007: unable to load firmware from file \"%s\"\n",
102 fw_name);
103 return -1;
104 }
105 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
106 printk(KERN_ERR "go7007: 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 printk(KERN_ERR "go7007: 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 printk(KERN_ERR "go7007: error transferring firmware\n");
126 rv = -1;
127 }
128 kfree(bounce);
129 return rv;
130 }
131
132 /*
133 * Boot the encoder and register the I2C adapter if requested. Do the
134 * minimum initialization necessary, since the board-specific code may
135 * still need to probe the board ID.
136 *
137 * Must NOT be called with the hw_lock held.
138 */
139 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
140 {
141 int ret;
142
143 down(&go->hw_lock);
144 ret = go7007_load_encoder(go);
145 up(&go->hw_lock);
146 if (ret < 0)
147 return -1;
148 if (!init_i2c)
149 return 0;
150 if (go7007_i2c_init(go) < 0)
151 return -1;
152 go->i2c_adapter_online = 1;
153 return 0;
154 }
155 EXPORT_SYMBOL(go7007_boot_encoder);
156
157 /*
158 * Configure any hardware-related registers in the GO7007, such as GPIO
159 * pins and bus parameters, which are board-specific. This assumes
160 * the boot firmware has already been downloaded.
161 *
162 * Must be called with the hw_lock held.
163 */
164 static int go7007_init_encoder(struct go7007 *go)
165 {
166 if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
167 go7007_write_addr(go, 0x1000, 0x0811);
168 go7007_write_addr(go, 0x1000, 0x0c11);
169 }
170 if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
171 /* Set GPIO pin 0 to be an output (audio clock control) */
172 go7007_write_addr(go, 0x3c82, 0x0001);
173 go7007_write_addr(go, 0x3c80, 0x00fe);
174 }
175 return 0;
176 }
177
178 /*
179 * Send the boot firmware to the GO7007 and configure the registers. This
180 * is the only way to stop the encoder once it has started streaming video.
181 *
182 * Must be called with the hw_lock held.
183 */
184 int go7007_reset_encoder(struct go7007 *go)
185 {
186 if (go7007_load_encoder(go) < 0)
187 return -1;
188 return go7007_init_encoder(go);
189 }
190
191 /*
192 * Attempt to instantiate an I2C client by ID, probably loading a module.
193 */
194 static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
195 int id, int addr)
196 {
197 struct i2c_board_info info;
198 char *modname;
199
200 switch (id) {
201 case I2C_DRIVERID_WIS_SAA7115:
202 modname = "wis-saa7115";
203 break;
204 case I2C_DRIVERID_WIS_SAA7113:
205 modname = "wis-saa7113";
206 break;
207 case I2C_DRIVERID_WIS_UDA1342:
208 modname = "wis-uda1342";
209 break;
210 case I2C_DRIVERID_WIS_SONY_TUNER:
211 modname = "wis-sony-tuner";
212 break;
213 case I2C_DRIVERID_WIS_TW9903:
214 modname = "wis-tw9903";
215 break;
216 case I2C_DRIVERID_WIS_TW2804:
217 modname = "wis-tw2804";
218 break;
219 case I2C_DRIVERID_WIS_OV7640:
220 modname = "wis-ov7640";
221 break;
222 case I2C_DRIVERID_S2250:
223 modname = "s2250-board";
224 break;
225 default:
226 modname = NULL;
227 break;
228 }
229 if (modname != NULL)
230 request_module(modname);
231
232 memset(&info, 0, sizeof(struct i2c_board_info));
233 info.addr = addr;
234 strlcpy(info.type, type, I2C_NAME_SIZE);
235 if (!i2c_new_device(adapter, &info))
236 return 0;
237 if (modname != NULL)
238 printk(KERN_INFO
239 "go7007: probing for module %s failed\n", modname);
240 else
241 printk(KERN_INFO
242 "go7007: sensor %u seems to be unsupported!\n", id);
243 return -1;
244 }
245
246 /*
247 * Finalize the GO7007 hardware setup, register the on-board I2C adapter
248 * (if used on this board), load the I2C client driver for the sensor
249 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
250 * interfaces.
251 *
252 * Must NOT be called with the hw_lock held.
253 */
254 int go7007_register_encoder(struct go7007 *go)
255 {
256 int i, ret;
257
258 printk(KERN_INFO "go7007: registering new %s\n", go->name);
259
260 down(&go->hw_lock);
261 ret = go7007_init_encoder(go);
262 up(&go->hw_lock);
263 if (ret < 0)
264 return -1;
265
266 if (!go->i2c_adapter_online &&
267 go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
268 if (go7007_i2c_init(go) < 0)
269 return -1;
270 go->i2c_adapter_online = 1;
271 }
272 if (go->i2c_adapter_online) {
273 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
274 init_i2c_module(&go->i2c_adapter,
275 go->board_info->i2c_devs[i].type,
276 go->board_info->i2c_devs[i].id,
277 go->board_info->i2c_devs[i].addr);
278 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
279 i2c_clients_command(&go->i2c_adapter,
280 DECODER_SET_CHANNEL, &go->channel_number);
281 }
282 if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
283 go->audio_enabled = 1;
284 go7007_snd_init(go);
285 }
286 return go7007_v4l2_init(go);
287 }
288 EXPORT_SYMBOL(go7007_register_encoder);
289
290 /*
291 * Send the encode firmware to the encoder, which will cause it
292 * to immediately start delivering the video and audio streams.
293 *
294 * Must be called with the hw_lock held.
295 */
296 int go7007_start_encoder(struct go7007 *go)
297 {
298 u8 *fw;
299 int fw_len, rv = 0, i;
300 u16 intr_val, intr_data;
301
302 go->modet_enable = 0;
303 if (!go->dvd_mode)
304 for (i = 0; i < 4; ++i) {
305 if (go->modet[i].enable) {
306 go->modet_enable = 1;
307 continue;
308 }
309 go->modet[i].pixel_threshold = 32767;
310 go->modet[i].motion_threshold = 32767;
311 go->modet[i].mb_threshold = 32767;
312 }
313
314 if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
315 return -1;
316
317 if (go7007_send_firmware(go, fw, fw_len) < 0 ||
318 go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
319 printk(KERN_ERR "go7007: error transferring firmware\n");
320 rv = -1;
321 goto start_error;
322 }
323
324 go->state = STATE_DATA;
325 go->parse_length = 0;
326 go->seen_frame = 0;
327 if (go7007_stream_start(go) < 0) {
328 printk(KERN_ERR "go7007: error starting stream transfer\n");
329 rv = -1;
330 goto start_error;
331 }
332
333 start_error:
334 kfree(fw);
335 return rv;
336 }
337
338 /*
339 * Store a byte in the current video buffer, if there is one.
340 */
341 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
342 {
343 if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
344 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
345 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
346
347 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
348 ++gobuf->offset;
349 ++gobuf->bytesused;
350 }
351 }
352
353 /*
354 * Deliver the last video buffer and get a new one to start writing to.
355 */
356 static void frame_boundary(struct go7007 *go)
357 {
358 struct go7007_buffer *gobuf;
359 int i;
360
361 if (go->active_buf) {
362 if (go->active_buf->modet_active) {
363 if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
364 for (i = 0; i < 216; ++i)
365 store_byte(go->active_buf,
366 go->active_map[i]);
367 go->active_buf->bytesused -= 216;
368 } else
369 go->active_buf->modet_active = 0;
370 }
371 go->active_buf->state = BUF_STATE_DONE;
372 wake_up_interruptible(&go->frame_waitq);
373 go->active_buf = NULL;
374 }
375 list_for_each_entry(gobuf, &go->stream, stream)
376 if (gobuf->state == BUF_STATE_QUEUED) {
377 gobuf->seq = go->next_seq;
378 do_gettimeofday(&gobuf->timestamp);
379 go->active_buf = gobuf;
380 break;
381 }
382 ++go->next_seq;
383 }
384
385 static void write_bitmap_word(struct go7007 *go)
386 {
387 int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
388
389 for (i = 0; i < 16; ++i) {
390 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
391 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
392 go->active_map[stride * y + (x >> 3)] |=
393 (go->modet_word & 1) << (x & 0x7);
394 go->modet_word >>= 1;
395 }
396 }
397
398 /*
399 * Parse a chunk of the video stream into frames. The frames are not
400 * delimited by the hardware, so we have to parse the frame boundaries
401 * based on the type of video stream we're receiving.
402 */
403 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
404 {
405 int i, seq_start_code = -1, frame_start_code = -1;
406
407 spin_lock(&go->spinlock);
408
409 switch (go->format) {
410 case GO7007_FORMAT_MPEG4:
411 seq_start_code = 0xB0;
412 frame_start_code = 0xB6;
413 break;
414 case GO7007_FORMAT_MPEG1:
415 case GO7007_FORMAT_MPEG2:
416 seq_start_code = 0xB3;
417 frame_start_code = 0x00;
418 break;
419 }
420
421 for (i = 0; i < length; ++i) {
422 if (go->active_buf != NULL &&
423 go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
424 printk(KERN_DEBUG "go7007: dropping oversized frame\n");
425 go->active_buf->offset -= go->active_buf->bytesused;
426 go->active_buf->bytesused = 0;
427 go->active_buf->modet_active = 0;
428 go->active_buf = NULL;
429 }
430
431 switch (go->state) {
432 case STATE_DATA:
433 switch (buf[i]) {
434 case 0x00:
435 go->state = STATE_00;
436 break;
437 case 0xFF:
438 go->state = STATE_FF;
439 break;
440 default:
441 store_byte(go->active_buf, buf[i]);
442 break;
443 }
444 break;
445 case STATE_00:
446 switch (buf[i]) {
447 case 0x00:
448 go->state = STATE_00_00;
449 break;
450 case 0xFF:
451 store_byte(go->active_buf, 0x00);
452 go->state = STATE_FF;
453 break;
454 default:
455 store_byte(go->active_buf, 0x00);
456 store_byte(go->active_buf, buf[i]);
457 go->state = STATE_DATA;
458 break;
459 }
460 break;
461 case STATE_00_00:
462 switch (buf[i]) {
463 case 0x00:
464 store_byte(go->active_buf, 0x00);
465 /* go->state remains STATE_00_00 */
466 break;
467 case 0x01:
468 go->state = STATE_00_00_01;
469 break;
470 case 0xFF:
471 store_byte(go->active_buf, 0x00);
472 store_byte(go->active_buf, 0x00);
473 go->state = STATE_FF;
474 break;
475 default:
476 store_byte(go->active_buf, 0x00);
477 store_byte(go->active_buf, 0x00);
478 store_byte(go->active_buf, buf[i]);
479 go->state = STATE_DATA;
480 break;
481 }
482 break;
483 case STATE_00_00_01:
484 /* If this is the start of a new MPEG frame,
485 * get a new buffer */
486 if ((go->format == GO7007_FORMAT_MPEG1 ||
487 go->format == GO7007_FORMAT_MPEG2 ||
488 go->format == GO7007_FORMAT_MPEG4) &&
489 (buf[i] == seq_start_code ||
490 buf[i] == 0xB8 || /* GOP code */
491 buf[i] == frame_start_code)) {
492 if (go->active_buf == NULL || go->seen_frame)
493 frame_boundary(go);
494 if (buf[i] == frame_start_code) {
495 if (go->active_buf != NULL)
496 go->active_buf->frame_offset =
497 go->active_buf->offset;
498 go->seen_frame = 1;
499 } else {
500 go->seen_frame = 0;
501 }
502 }
503 /* Handle any special chunk types, or just write the
504 * start code to the (potentially new) buffer */
505 switch (buf[i]) {
506 case 0xF5: /* timestamp */
507 go->parse_length = 12;
508 go->state = STATE_UNPARSED;
509 break;
510 case 0xF6: /* vbi */
511 go->state = STATE_VBI_LEN_A;
512 break;
513 case 0xF8: /* MD map */
514 go->parse_length = 0;
515 memset(go->active_map, 0,
516 sizeof(go->active_map));
517 go->state = STATE_MODET_MAP;
518 break;
519 case 0xFF: /* Potential JPEG start code */
520 store_byte(go->active_buf, 0x00);
521 store_byte(go->active_buf, 0x00);
522 store_byte(go->active_buf, 0x01);
523 go->state = STATE_FF;
524 break;
525 default:
526 store_byte(go->active_buf, 0x00);
527 store_byte(go->active_buf, 0x00);
528 store_byte(go->active_buf, 0x01);
529 store_byte(go->active_buf, buf[i]);
530 go->state = STATE_DATA;
531 break;
532 }
533 break;
534 case STATE_FF:
535 switch (buf[i]) {
536 case 0x00:
537 store_byte(go->active_buf, 0xFF);
538 go->state = STATE_00;
539 break;
540 case 0xFF:
541 store_byte(go->active_buf, 0xFF);
542 /* go->state remains STATE_FF */
543 break;
544 case 0xD8:
545 if (go->format == GO7007_FORMAT_MJPEG)
546 frame_boundary(go);
547 /* fall through */
548 default:
549 store_byte(go->active_buf, 0xFF);
550 store_byte(go->active_buf, buf[i]);
551 go->state = STATE_DATA;
552 break;
553 }
554 break;
555 case STATE_VBI_LEN_A:
556 go->parse_length = buf[i] << 8;
557 go->state = STATE_VBI_LEN_B;
558 break;
559 case STATE_VBI_LEN_B:
560 go->parse_length |= buf[i];
561 if (go->parse_length > 0)
562 go->state = STATE_UNPARSED;
563 else
564 go->state = STATE_DATA;
565 break;
566 case STATE_MODET_MAP:
567 if (go->parse_length < 204) {
568 if (go->parse_length & 1) {
569 go->modet_word |= buf[i];
570 write_bitmap_word(go);
571 } else
572 go->modet_word = buf[i] << 8;
573 } else if (go->parse_length == 207 && go->active_buf) {
574 go->active_buf->modet_active = buf[i];
575 }
576 if (++go->parse_length == 208)
577 go->state = STATE_DATA;
578 break;
579 case STATE_UNPARSED:
580 if (--go->parse_length == 0)
581 go->state = STATE_DATA;
582 break;
583 }
584 }
585
586 spin_unlock(&go->spinlock);
587 }
588 EXPORT_SYMBOL(go7007_parse_video_stream);
589
590 /*
591 * Allocate a new go7007 struct. Used by the hardware-specific probe.
592 */
593 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
594 {
595 struct go7007 *go;
596 int i;
597
598 go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
599 if (go == NULL)
600 return NULL;
601 go->dev = dev;
602 go->board_info = board;
603 go->board_id = 0;
604 go->tuner_type = -1;
605 go->channel_number = 0;
606 go->name[0] = 0;
607 init_MUTEX(&go->hw_lock);
608 init_waitqueue_head(&go->frame_waitq);
609 spin_lock_init(&go->spinlock);
610 go->video_dev = NULL;
611 go->ref_count = 0;
612 go->status = STATUS_INIT;
613 memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
614 go->i2c_adapter_online = 0;
615 go->interrupt_available = 0;
616 init_waitqueue_head(&go->interrupt_waitq);
617 go->in_use = 0;
618 go->input = 0;
619 if (board->sensor_flags & GO7007_SENSOR_TV) {
620 go->standard = GO7007_STD_NTSC;
621 go->width = 720;
622 go->height = 480;
623 go->sensor_framerate = 30000;
624 } else {
625 go->standard = GO7007_STD_OTHER;
626 go->width = board->sensor_width;
627 go->height = board->sensor_height;
628 go->sensor_framerate = board->sensor_framerate;
629 }
630 go->encoder_v_offset = board->sensor_v_offset;
631 go->encoder_h_offset = board->sensor_h_offset;
632 go->encoder_h_halve = 0;
633 go->encoder_v_halve = 0;
634 go->encoder_subsample = 0;
635 go->streaming = 0;
636 go->format = GO7007_FORMAT_MJPEG;
637 go->bitrate = 1500000;
638 go->fps_scale = 1;
639 go->pali = 0;
640 go->aspect_ratio = GO7007_RATIO_1_1;
641 go->gop_size = 0;
642 go->ipb = 0;
643 go->closed_gop = 0;
644 go->repeat_seqhead = 0;
645 go->seq_header_enable = 0;
646 go->gop_header_enable = 0;
647 go->dvd_mode = 0;
648 go->interlace_coding = 0;
649 for (i = 0; i < 4; ++i)
650 go->modet[i].enable = 0;;
651 for (i = 0; i < 1624; ++i)
652 go->modet_map[i] = 0;
653 go->audio_deliver = NULL;
654 go->audio_enabled = 0;
655 INIT_LIST_HEAD(&go->stream);
656
657 return go;
658 }
659 EXPORT_SYMBOL(go7007_alloc);
660
661 /*
662 * Detach and unregister the encoder. The go7007 struct won't be freed
663 * until v4l2 finishes releasing its resources and all associated fds are
664 * closed by applications.
665 */
666 void go7007_remove(struct go7007 *go)
667 {
668 if (go->i2c_adapter_online) {
669 if (i2c_del_adapter(&go->i2c_adapter) == 0)
670 go->i2c_adapter_online = 0;
671 else
672 printk(KERN_ERR
673 "go7007: error removing I2C adapter!\n");
674 }
675
676 if (go->audio_enabled)
677 go7007_snd_remove(go);
678 go7007_v4l2_remove(go);
679 }
680 EXPORT_SYMBOL(go7007_remove);
681
682 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support