Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus
[linux-2.6] / drivers / staging / go7007 / go7007-driver.c
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, int id, int addr)
195 {
196         char *modname;
197
198         switch (id) {
199         case I2C_DRIVERID_WIS_SAA7115:
200                 modname = "wis-saa7115";
201                 break;
202         case I2C_DRIVERID_WIS_SAA7113:
203                 modname = "wis-saa7113";
204                 break;
205         case I2C_DRIVERID_WIS_UDA1342:
206                 modname = "wis-uda1342";
207                 break;
208         case I2C_DRIVERID_WIS_SONY_TUNER:
209                 modname = "wis-sony-tuner";
210                 break;
211         case I2C_DRIVERID_WIS_TW9903:
212                 modname = "wis-tw9903";
213                 break;
214         case I2C_DRIVERID_WIS_TW2804:
215                 modname = "wis-tw2804";
216                 break;
217         case I2C_DRIVERID_WIS_OV7640:
218                 modname = "wis-ov7640";
219                 break;
220         case I2C_DRIVERID_S2250:
221                 modname = "s2250-board";
222                 break;
223         default:
224                 modname = NULL;
225                 break;
226         }
227         if (modname != NULL)
228                 request_module(modname);
229         if (wis_i2c_probe_device(adapter, id, addr) == 1)
230                 return 0;
231         if (modname != NULL)
232                 printk(KERN_INFO
233                         "go7007: probing for module %s failed\n", modname);
234         else
235                 printk(KERN_INFO
236                         "go7007: sensor %u seems to be unsupported!\n", id);
237         return -1;
238 }
239
240 /*
241  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
242  * (if used on this board), load the I2C client driver for the sensor
243  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
244  * interfaces.
245  *
246  * Must NOT be called with the hw_lock held.
247  */
248 int go7007_register_encoder(struct go7007 *go)
249 {
250         int i, ret;
251
252         printk(KERN_INFO "go7007: registering new %s\n", go->name);
253
254         down(&go->hw_lock);
255         ret = go7007_init_encoder(go);
256         up(&go->hw_lock);
257         if (ret < 0)
258                 return -1;
259
260         if (!go->i2c_adapter_online &&
261                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
262                 if (go7007_i2c_init(go) < 0)
263                         return -1;
264                 go->i2c_adapter_online = 1;
265         }
266         if (go->i2c_adapter_online) {
267                 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
268                         init_i2c_module(&go->i2c_adapter,
269                                         go->board_info->i2c_devs[i].id,
270                                         go->board_info->i2c_devs[i].addr);
271 #ifdef TUNER_SET_TYPE_ADDR
272                 if (go->tuner_type >= 0) {
273                         struct tuner_setup tun_setup = {
274                                 .mode_mask      = T_ANALOG_TV,
275                                 .addr           = ADDR_UNSET,
276                                 .type           = go->tuner_type
277                         };
278                         i2c_clients_command(&go->i2c_adapter,
279                                 TUNER_SET_TYPE_ADDR, &tun_setup);
280                 }
281 #else
282                 if (go->tuner_type >= 0)
283                         i2c_clients_command(&go->i2c_adapter,
284                                 TUNER_SET_TYPE, &go->tuner_type);
285 #endif
286                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
287                         i2c_clients_command(&go->i2c_adapter,
288                                 DECODER_SET_CHANNEL, &go->channel_number);
289         }
290         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
291                 go->audio_enabled = 1;
292                 go7007_snd_init(go);
293         }
294         return go7007_v4l2_init(go);
295 }
296 EXPORT_SYMBOL(go7007_register_encoder);
297
298 /*
299  * Send the encode firmware to the encoder, which will cause it
300  * to immediately start delivering the video and audio streams.
301  *
302  * Must be called with the hw_lock held.
303  */
304 int go7007_start_encoder(struct go7007 *go)
305 {
306         u8 *fw;
307         int fw_len, rv = 0, i;
308         u16 intr_val, intr_data;
309
310         go->modet_enable = 0;
311         if (!go->dvd_mode)
312                 for (i = 0; i < 4; ++i) {
313                         if (go->modet[i].enable) {
314                                 go->modet_enable = 1;
315                                 continue;
316                         }
317                         go->modet[i].pixel_threshold = 32767;
318                         go->modet[i].motion_threshold = 32767;
319                         go->modet[i].mb_threshold = 32767;
320                 }
321
322         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
323                 return -1;
324
325         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
326                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
327                 printk(KERN_ERR "go7007: error transferring firmware\n");
328                 rv = -1;
329                 goto start_error;
330         }
331
332         go->state = STATE_DATA;
333         go->parse_length = 0;
334         go->seen_frame = 0;
335         if (go7007_stream_start(go) < 0) {
336                 printk(KERN_ERR "go7007: error starting stream transfer\n");
337                 rv = -1;
338                 goto start_error;
339         }
340
341 start_error:
342         kfree(fw);
343         return rv;
344 }
345
346 /*
347  * Store a byte in the current video buffer, if there is one.
348  */
349 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
350 {
351         if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
352                 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
353                 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
354
355                 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
356                 ++gobuf->offset;
357                 ++gobuf->bytesused;
358         }
359 }
360
361 /*
362  * Deliver the last video buffer and get a new one to start writing to.
363  */
364 static void frame_boundary(struct go7007 *go)
365 {
366         struct go7007_buffer *gobuf;
367         int i;
368
369         if (go->active_buf) {
370                 if (go->active_buf->modet_active) {
371                         if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
372                                 for (i = 0; i < 216; ++i)
373                                         store_byte(go->active_buf,
374                                                         go->active_map[i]);
375                                 go->active_buf->bytesused -= 216;
376                         } else
377                                 go->active_buf->modet_active = 0;
378                 }
379                 go->active_buf->state = BUF_STATE_DONE;
380                 wake_up_interruptible(&go->frame_waitq);
381                 go->active_buf = NULL;
382         }
383         list_for_each_entry(gobuf, &go->stream, stream)
384                 if (gobuf->state == BUF_STATE_QUEUED) {
385                         gobuf->seq = go->next_seq;
386                         do_gettimeofday(&gobuf->timestamp);
387                         go->active_buf = gobuf;
388                         break;
389                 }
390         ++go->next_seq;
391 }
392
393 static void write_bitmap_word(struct go7007 *go)
394 {
395         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
396
397         for (i = 0; i < 16; ++i) {
398                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
399                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
400                 go->active_map[stride * y + (x >> 3)] |=
401                                         (go->modet_word & 1) << (x & 0x7);
402                 go->modet_word >>= 1;
403         }
404 }
405
406 /*
407  * Parse a chunk of the video stream into frames.  The frames are not
408  * delimited by the hardware, so we have to parse the frame boundaries
409  * based on the type of video stream we're receiving.
410  */
411 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
412 {
413         int i, seq_start_code = -1, frame_start_code = -1;
414
415         spin_lock(&go->spinlock);
416
417         switch (go->format) {
418         case GO7007_FORMAT_MPEG4:
419                 seq_start_code = 0xB0;
420                 frame_start_code = 0xB6;
421                 break;
422         case GO7007_FORMAT_MPEG1:
423         case GO7007_FORMAT_MPEG2:
424                 seq_start_code = 0xB3;
425                 frame_start_code = 0x00;
426                 break;
427         }
428
429         for (i = 0; i < length; ++i) {
430                 if (go->active_buf != NULL &&
431                             go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
432                         printk(KERN_DEBUG "go7007: dropping oversized frame\n");
433                         go->active_buf->offset -= go->active_buf->bytesused;
434                         go->active_buf->bytesused = 0;
435                         go->active_buf->modet_active = 0;
436                         go->active_buf = NULL;
437                 }
438
439                 switch (go->state) {
440                 case STATE_DATA:
441                         switch (buf[i]) {
442                         case 0x00:
443                                 go->state = STATE_00;
444                                 break;
445                         case 0xFF:
446                                 go->state = STATE_FF;
447                                 break;
448                         default:
449                                 store_byte(go->active_buf, buf[i]);
450                                 break;
451                         }
452                         break;
453                 case STATE_00:
454                         switch (buf[i]) {
455                         case 0x00:
456                                 go->state = STATE_00_00;
457                                 break;
458                         case 0xFF:
459                                 store_byte(go->active_buf, 0x00);
460                                 go->state = STATE_FF;
461                                 break;
462                         default:
463                                 store_byte(go->active_buf, 0x00);
464                                 store_byte(go->active_buf, buf[i]);
465                                 go->state = STATE_DATA;
466                                 break;
467                         }
468                         break;
469                 case STATE_00_00:
470                         switch (buf[i]) {
471                         case 0x00:
472                                 store_byte(go->active_buf, 0x00);
473                                 /* go->state remains STATE_00_00 */
474                                 break;
475                         case 0x01:
476                                 go->state = STATE_00_00_01;
477                                 break;
478                         case 0xFF:
479                                 store_byte(go->active_buf, 0x00);
480                                 store_byte(go->active_buf, 0x00);
481                                 go->state = STATE_FF;
482                                 break;
483                         default:
484                                 store_byte(go->active_buf, 0x00);
485                                 store_byte(go->active_buf, 0x00);
486                                 store_byte(go->active_buf, buf[i]);
487                                 go->state = STATE_DATA;
488                                 break;
489                         }
490                         break;
491                 case STATE_00_00_01:
492                         /* If this is the start of a new MPEG frame,
493                          * get a new buffer */
494                         if ((go->format == GO7007_FORMAT_MPEG1 ||
495                                         go->format == GO7007_FORMAT_MPEG2 ||
496                                         go->format == GO7007_FORMAT_MPEG4) &&
497                                         (buf[i] == seq_start_code ||
498                                                 buf[i] == 0xB8 || /* GOP code */
499                                                 buf[i] == frame_start_code)) {
500                                 if (go->active_buf == NULL || go->seen_frame)
501                                         frame_boundary(go);
502                                 if (buf[i] == frame_start_code) {
503                                         if (go->active_buf != NULL)
504                                                 go->active_buf->frame_offset =
505                                                         go->active_buf->offset;
506                                         go->seen_frame = 1;
507                                 } else {
508                                         go->seen_frame = 0;
509                                 }
510                         }
511                         /* Handle any special chunk types, or just write the
512                          * start code to the (potentially new) buffer */
513                         switch (buf[i]) {
514                         case 0xF5: /* timestamp */
515                                 go->parse_length = 12;
516                                 go->state = STATE_UNPARSED;
517                                 break;
518                         case 0xF6: /* vbi */
519                                 go->state = STATE_VBI_LEN_A;
520                                 break;
521                         case 0xF8: /* MD map */
522                                 go->parse_length = 0;
523                                 memset(go->active_map, 0,
524                                                 sizeof(go->active_map));
525                                 go->state = STATE_MODET_MAP;
526                                 break;
527                         case 0xFF: /* Potential JPEG start code */
528                                 store_byte(go->active_buf, 0x00);
529                                 store_byte(go->active_buf, 0x00);
530                                 store_byte(go->active_buf, 0x01);
531                                 go->state = STATE_FF;
532                                 break;
533                         default:
534                                 store_byte(go->active_buf, 0x00);
535                                 store_byte(go->active_buf, 0x00);
536                                 store_byte(go->active_buf, 0x01);
537                                 store_byte(go->active_buf, buf[i]);
538                                 go->state = STATE_DATA;
539                                 break;
540                         }
541                         break;
542                 case STATE_FF:
543                         switch (buf[i]) {
544                         case 0x00:
545                                 store_byte(go->active_buf, 0xFF);
546                                 go->state = STATE_00;
547                                 break;
548                         case 0xFF:
549                                 store_byte(go->active_buf, 0xFF);
550                                 /* go->state remains STATE_FF */
551                                 break;
552                         case 0xD8:
553                                 if (go->format == GO7007_FORMAT_MJPEG)
554                                         frame_boundary(go);
555                                 /* fall through */
556                         default:
557                                 store_byte(go->active_buf, 0xFF);
558                                 store_byte(go->active_buf, buf[i]);
559                                 go->state = STATE_DATA;
560                                 break;
561                         }
562                         break;
563                 case STATE_VBI_LEN_A:
564                         go->parse_length = buf[i] << 8;
565                         go->state = STATE_VBI_LEN_B;
566                         break;
567                 case STATE_VBI_LEN_B:
568                         go->parse_length |= buf[i];
569                         if (go->parse_length > 0)
570                                 go->state = STATE_UNPARSED;
571                         else
572                                 go->state = STATE_DATA;
573                         break;
574                 case STATE_MODET_MAP:
575                         if (go->parse_length < 204) {
576                                 if (go->parse_length & 1) {
577                                         go->modet_word |= buf[i];
578                                         write_bitmap_word(go);
579                                 } else
580                                         go->modet_word = buf[i] << 8;
581                         } else if (go->parse_length == 207 && go->active_buf) {
582                                 go->active_buf->modet_active = buf[i];
583                         }
584                         if (++go->parse_length == 208)
585                                 go->state = STATE_DATA;
586                         break;
587                 case STATE_UNPARSED:
588                         if (--go->parse_length == 0)
589                                 go->state = STATE_DATA;
590                         break;
591                 }
592         }
593
594         spin_unlock(&go->spinlock);
595 }
596 EXPORT_SYMBOL(go7007_parse_video_stream);
597
598 /*
599  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
600  */
601 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
602 {
603         struct go7007 *go;
604         int i;
605
606         go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
607         if (go == NULL)
608                 return NULL;
609         go->dev = dev;
610         go->board_info = board;
611         go->board_id = 0;
612         go->tuner_type = -1;
613         go->channel_number = 0;
614         go->name[0] = 0;
615         init_MUTEX(&go->hw_lock);
616         init_waitqueue_head(&go->frame_waitq);
617         spin_lock_init(&go->spinlock);
618         go->video_dev = NULL;
619         go->ref_count = 0;
620         go->status = STATUS_INIT;
621         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
622         go->i2c_adapter_online = 0;
623         go->interrupt_available = 0;
624         init_waitqueue_head(&go->interrupt_waitq);
625         go->in_use = 0;
626         go->input = 0;
627         if (board->sensor_flags & GO7007_SENSOR_TV) {
628                 go->standard = GO7007_STD_NTSC;
629                 go->width = 720;
630                 go->height = 480;
631                 go->sensor_framerate = 30000;
632         } else {
633                 go->standard = GO7007_STD_OTHER;
634                 go->width = board->sensor_width;
635                 go->height = board->sensor_height;
636                 go->sensor_framerate = board->sensor_framerate;
637         }
638         go->encoder_v_offset = board->sensor_v_offset;
639         go->encoder_h_offset = board->sensor_h_offset;
640         go->encoder_h_halve = 0;
641         go->encoder_v_halve = 0;
642         go->encoder_subsample = 0;
643         go->streaming = 0;
644         go->format = GO7007_FORMAT_MJPEG;
645         go->bitrate = 1500000;
646         go->fps_scale = 1;
647         go->pali = 0;
648         go->aspect_ratio = GO7007_RATIO_1_1;
649         go->gop_size = 0;
650         go->ipb = 0;
651         go->closed_gop = 0;
652         go->repeat_seqhead = 0;
653         go->seq_header_enable = 0;
654         go->gop_header_enable = 0;
655         go->dvd_mode = 0;
656         go->interlace_coding = 0;
657         for (i = 0; i < 4; ++i)
658                 go->modet[i].enable = 0;;
659         for (i = 0; i < 1624; ++i)
660                 go->modet_map[i] = 0;
661         go->audio_deliver = NULL;
662         go->audio_enabled = 0;
663         INIT_LIST_HEAD(&go->stream);
664
665         return go;
666 }
667 EXPORT_SYMBOL(go7007_alloc);
668
669 /*
670  * Detach and unregister the encoder.  The go7007 struct won't be freed
671  * until v4l2 finishes releasing its resources and all associated fds are
672  * closed by applications.
673  */
674 void go7007_remove(struct go7007 *go)
675 {
676         if (go->i2c_adapter_online) {
677                 if (i2c_del_adapter(&go->i2c_adapter) == 0)
678                         go->i2c_adapter_online = 0;
679                 else
680                         printk(KERN_ERR
681                                 "go7007: error removing I2C adapter!\n");
682         }
683
684         if (go->audio_enabled)
685                 go7007_snd_remove(go);
686         go7007_v4l2_remove(go);
687 }
688 EXPORT_SYMBOL(go7007_remove);
689
690 MODULE_LICENSE("GPL v2");