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V4L/DVB (7106): em28xx/: make 2 functions static
[deliverable/linux.git] / drivers / media / video / em28xx / em28xx-video.c
1 /*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/version.h>
35 #include <linux/mm.h>
36 #include <linux/mutex.h>
37
38 #include "em28xx.h"
39 #include <media/v4l2-common.h>
40 #include <media/msp3400.h>
41 #include <media/tuner.h>
42
43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
44 "Markus Rechberger <mrechberger@gmail.com>, " \
45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
46 "Sascha Sommer <saschasommer@freenet.de>"
47
48 #define DRIVER_NAME "em28xx"
49 #define DRIVER_DESC "Empia em28xx based USB video device driver"
50 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
51
52 #define em28xx_videodbg(fmt, arg...) do {\
53 if (video_debug) \
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __FUNCTION__ , ##arg); } while (0)
56
57 MODULE_AUTHOR(DRIVER_AUTHOR);
58 MODULE_DESCRIPTION(DRIVER_DESC);
59 MODULE_LICENSE("GPL");
60
61 static LIST_HEAD(em28xx_devlist);
62
63 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
67
68 module_param_array(card, int, NULL, 0444);
69 module_param_array(video_nr, int, NULL, 0444);
70 module_param_array(vbi_nr, int, NULL, 0444);
71 module_param_array(radio_nr, int, NULL, 0444);
72 MODULE_PARM_DESC(card, "card type");
73 MODULE_PARM_DESC(video_nr, "video device numbers");
74 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
75 MODULE_PARM_DESC(radio_nr, "radio device numbers");
76
77 static unsigned int video_debug = 0;
78 module_param(video_debug,int,0644);
79 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
80
81 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
82 static unsigned long em28xx_devused;
83
84 /* supported controls */
85 /* Common to all boards */
86 static struct v4l2_queryctrl em28xx_qctrl[] = {
87 {
88 .id = V4L2_CID_AUDIO_VOLUME,
89 .type = V4L2_CTRL_TYPE_INTEGER,
90 .name = "Volume",
91 .minimum = 0x0,
92 .maximum = 0x1f,
93 .step = 0x1,
94 .default_value = 0x1f,
95 .flags = 0,
96 },{
97 .id = V4L2_CID_AUDIO_MUTE,
98 .type = V4L2_CTRL_TYPE_BOOLEAN,
99 .name = "Mute",
100 .minimum = 0,
101 .maximum = 1,
102 .step = 1,
103 .default_value = 1,
104 .flags = 0,
105 }
106 };
107
108 static struct usb_driver em28xx_usb_driver;
109
110
111 /********************* v4l2 interface ******************************************/
112
113 /*
114 * em28xx_config()
115 * inits registers with sane defaults
116 */
117 static int em28xx_config(struct em28xx *dev)
118 {
119
120 /* Sets I2C speed to 100 KHz */
121 if (!dev->is_em2800)
122 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
123
124 /* enable vbi capturing */
125
126 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
127 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
128 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
129
130 dev->mute = 1; /* maybe not the right place... */
131 dev->volume = 0x1f;
132
133 em28xx_outfmt_set_yuv422(dev);
134 em28xx_colorlevels_set_default(dev);
135 em28xx_compression_disable(dev);
136
137 return 0;
138 }
139
140 /*
141 * em28xx_config_i2c()
142 * configure i2c attached devices
143 */
144 static void em28xx_config_i2c(struct em28xx *dev)
145 {
146 struct v4l2_routing route;
147
148 route.input = INPUT(dev->ctl_input)->vmux;
149 route.output = 0;
150 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
151 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
152 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
153 }
154
155 /*
156 * em28xx_empty_framequeues()
157 * prepare queues for incoming and outgoing frames
158 */
159 static void em28xx_empty_framequeues(struct em28xx *dev)
160 {
161 u32 i;
162
163 INIT_LIST_HEAD(&dev->inqueue);
164 INIT_LIST_HEAD(&dev->outqueue);
165
166 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
167 dev->frame[i].state = F_UNUSED;
168 dev->frame[i].buf.bytesused = 0;
169 }
170 }
171
172 static void video_mux(struct em28xx *dev, int index)
173 {
174 struct v4l2_routing route;
175
176 route.input = INPUT(index)->vmux;
177 route.output = 0;
178 dev->ctl_input = index;
179 dev->ctl_ainput = INPUT(index)->amux;
180
181 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
182
183 if (dev->has_msp34xx) {
184 if (dev->i2s_speed)
185 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
186 route.input = dev->ctl_ainput;
187 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
188 /* Note: this is msp3400 specific */
189 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
190 }
191
192 em28xx_set_audio_source(dev);
193 }
194
195 /* Usage lock check functions */
196 static int res_get(struct em28xx_fh *fh)
197 {
198 struct em28xx *dev = fh->dev;
199 int rc = 0;
200
201 /* This instance already has stream_on */
202 if (fh->stream_on)
203 return rc;
204
205 mutex_lock(&dev->lock);
206
207 if (dev->stream_on)
208 rc = -EINVAL;
209 else {
210 dev->stream_on = 1;
211 fh->stream_on = 1;
212 }
213
214 mutex_unlock(&dev->lock);
215 return rc;
216 }
217
218 static int res_check(struct em28xx_fh *fh)
219 {
220 return (fh->stream_on);
221 }
222
223 static void res_free(struct em28xx_fh *fh)
224 {
225 struct em28xx *dev = fh->dev;
226
227 mutex_lock(&dev->lock);
228 fh->stream_on = 0;
229 dev->stream_on = 0;
230 mutex_unlock(&dev->lock);
231 }
232
233 /*
234 * em28xx_vm_open()
235 */
236 static void em28xx_vm_open(struct vm_area_struct *vma)
237 {
238 struct em28xx_frame_t *f = vma->vm_private_data;
239 f->vma_use_count++;
240 }
241
242 /*
243 * em28xx_vm_close()
244 */
245 static void em28xx_vm_close(struct vm_area_struct *vma)
246 {
247 /* NOTE: buffers are not freed here */
248 struct em28xx_frame_t *f = vma->vm_private_data;
249
250 if (f->vma_use_count)
251 f->vma_use_count--;
252 }
253
254 static struct vm_operations_struct em28xx_vm_ops = {
255 .open = em28xx_vm_open,
256 .close = em28xx_vm_close,
257 };
258
259
260 /*
261 * em28xx_get_ctrl()
262 * return the current saturation, brightness or contrast, mute state
263 */
264 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
265 {
266 switch (ctrl->id) {
267 case V4L2_CID_AUDIO_MUTE:
268 ctrl->value = dev->mute;
269 return 0;
270 case V4L2_CID_AUDIO_VOLUME:
271 ctrl->value = dev->volume;
272 return 0;
273 default:
274 return -EINVAL;
275 }
276 }
277
278 /*
279 * em28xx_set_ctrl()
280 * mute or set new saturation, brightness or contrast
281 */
282 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
283 {
284 switch (ctrl->id) {
285 case V4L2_CID_AUDIO_MUTE:
286 if (ctrl->value != dev->mute) {
287 dev->mute = ctrl->value;
288 return em28xx_audio_analog_set(dev);
289 }
290 return 0;
291 case V4L2_CID_AUDIO_VOLUME:
292 dev->volume = ctrl->value;
293 return em28xx_audio_analog_set(dev);
294 default:
295 return -EINVAL;
296 }
297 }
298
299 /*
300 * em28xx_stream_interrupt()
301 * stops streaming
302 */
303 static int em28xx_stream_interrupt(struct em28xx *dev)
304 {
305 int rc = 0;
306
307 /* stop reading from the device */
308
309 dev->stream = STREAM_INTERRUPT;
310 rc = wait_event_timeout(dev->wait_stream,
311 (dev->stream == STREAM_OFF) ||
312 (dev->state & DEV_DISCONNECTED),
313 EM28XX_URB_TIMEOUT);
314
315 if (rc) {
316 dev->state |= DEV_MISCONFIGURED;
317 em28xx_videodbg("device is misconfigured; close and "
318 "open /dev/video%d again\n",
319 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
320 return rc;
321 }
322
323 return 0;
324 }
325
326
327 static int check_dev(struct em28xx *dev)
328 {
329 if (dev->state & DEV_DISCONNECTED) {
330 em28xx_errdev("v4l2 ioctl: device not present\n");
331 return -ENODEV;
332 }
333
334 if (dev->state & DEV_MISCONFIGURED) {
335 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
336 "close and open it again\n");
337 return -EIO;
338 }
339 return 0;
340 }
341
342 static void get_scale(struct em28xx *dev,
343 unsigned int width, unsigned int height,
344 unsigned int *hscale, unsigned int *vscale)
345 {
346 unsigned int maxw = norm_maxw(dev);
347 unsigned int maxh = norm_maxh(dev);
348
349 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
350 if (*hscale >= 0x4000)
351 *hscale = 0x3fff;
352
353 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
354 if (*vscale >= 0x4000)
355 *vscale = 0x3fff;
356 }
357
358 /* ------------------------------------------------------------------
359 IOCTL vidioc handling
360 ------------------------------------------------------------------*/
361
362 static int vidioc_g_fmt_cap(struct file *file, void *priv,
363 struct v4l2_format *f)
364 {
365 struct em28xx_fh *fh = priv;
366 struct em28xx *dev = fh->dev;
367
368 mutex_lock(&dev->lock);
369
370 f->fmt.pix.width = dev->width;
371 f->fmt.pix.height = dev->height;
372 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
373 f->fmt.pix.bytesperline = dev->bytesperline;
374 f->fmt.pix.sizeimage = dev->frame_size;
375 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
376
377 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
378 f->fmt.pix.field = dev->interlaced ?
379 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
380
381 mutex_unlock(&dev->lock);
382 return 0;
383 }
384
385 static int vidioc_try_fmt_cap(struct file *file, void *priv,
386 struct v4l2_format *f)
387 {
388 struct em28xx_fh *fh = priv;
389 struct em28xx *dev = fh->dev;
390 int width = f->fmt.pix.width;
391 int height = f->fmt.pix.height;
392 unsigned int maxw = norm_maxw(dev);
393 unsigned int maxh = norm_maxh(dev);
394 unsigned int hscale, vscale;
395
396 /* width must even because of the YUYV format
397 height must be even because of interlacing */
398 height &= 0xfffe;
399 width &= 0xfffe;
400
401 if (height < 32)
402 height = 32;
403 if (height > maxh)
404 height = maxh;
405 if (width < 48)
406 width = 48;
407 if (width > maxw)
408 width = maxw;
409
410 mutex_lock(&dev->lock);
411
412 if (dev->is_em2800) {
413 /* the em2800 can only scale down to 50% */
414 if (height % (maxh / 2))
415 height = maxh;
416 if (width % (maxw / 2))
417 width = maxw;
418 /* according to empiatech support */
419 /* the MaxPacketSize is to small to support */
420 /* framesizes larger than 640x480 @ 30 fps */
421 /* or 640x576 @ 25 fps. As this would cut */
422 /* of a part of the image we prefer */
423 /* 360x576 or 360x480 for now */
424 if (width == maxw && height == maxh)
425 width /= 2;
426 }
427
428 get_scale(dev, width, height, &hscale, &vscale);
429
430 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
431 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
432
433 f->fmt.pix.width = width;
434 f->fmt.pix.height = height;
435 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
436 f->fmt.pix.bytesperline = width * 2;
437 f->fmt.pix.sizeimage = width * 2 * height;
438 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
439 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
440
441 mutex_unlock(&dev->lock);
442 return 0;
443 }
444
445 static int vidioc_s_fmt_cap(struct file *file, void *priv,
446 struct v4l2_format *f)
447 {
448 struct em28xx_fh *fh = priv;
449 struct em28xx *dev = fh->dev;
450 int rc, i;
451
452 rc = check_dev(dev);
453 if (rc < 0)
454 return rc;
455
456 vidioc_try_fmt_cap(file, priv, f);
457
458 mutex_lock(&dev->lock);
459
460 for (i = 0; i < dev->num_frames; i++)
461 if (dev->frame[i].vma_use_count) {
462 em28xx_videodbg("VIDIOC_S_FMT failed. "
463 "Unmap the buffers first.\n");
464 rc = -EINVAL;
465 goto err;
466 }
467
468 /* stop io in case it is already in progress */
469 if (dev->stream == STREAM_ON) {
470 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
471 rc = em28xx_stream_interrupt(dev);
472 if (rc < 0)
473 goto err;
474 }
475
476 em28xx_release_buffers(dev);
477 dev->io = IO_NONE;
478
479 /* set new image size */
480 dev->width = f->fmt.pix.width;
481 dev->height = f->fmt.pix.height;
482 dev->frame_size = dev->width * dev->height * 2;
483 dev->field_size = dev->frame_size >> 1;
484 dev->bytesperline = dev->width * 2;
485 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
486
487 /* FIXME: This is really weird! Why capture is starting with
488 this ioctl ???
489 */
490 em28xx_uninit_isoc(dev);
491 em28xx_set_alternate(dev);
492 em28xx_capture_start(dev, 1);
493 em28xx_resolution_set(dev);
494 em28xx_init_isoc(dev);
495 rc = 0;
496
497 err:
498 mutex_unlock(&dev->lock);
499 return rc;
500 }
501
502 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
503 {
504 struct em28xx_fh *fh = priv;
505 struct em28xx *dev = fh->dev;
506 struct v4l2_format f;
507 int rc;
508
509 rc = check_dev(dev);
510 if (rc < 0)
511 return rc;
512
513 mutex_lock(&dev->lock);
514 dev->norm = *norm;
515 mutex_unlock(&dev->lock);
516
517 /* Adjusts width/height, if needed */
518 f.fmt.pix.width = dev->width;
519 f.fmt.pix.height = dev->height;
520 vidioc_try_fmt_cap(file, priv, &f);
521
522 mutex_lock(&dev->lock);
523
524 /* set new image size */
525 dev->width = f.fmt.pix.width;
526 dev->height = f.fmt.pix.height;
527 dev->frame_size = dev->width * dev->height * 2;
528 dev->field_size = dev->frame_size >> 1;
529 dev->bytesperline = dev->width * 2;
530 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
531
532 em28xx_resolution_set(dev);
533 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
534
535 mutex_unlock(&dev->lock);
536 return 0;
537 }
538
539 static const char *iname[] = {
540 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
541 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
542 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
543 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
544 [EM28XX_VMUX_SVIDEO] = "S-Video",
545 [EM28XX_VMUX_TELEVISION] = "Television",
546 [EM28XX_VMUX_CABLE] = "Cable TV",
547 [EM28XX_VMUX_DVB] = "DVB",
548 [EM28XX_VMUX_DEBUG] = "for debug only",
549 };
550
551 static int vidioc_enum_input(struct file *file, void *priv,
552 struct v4l2_input *i)
553 {
554 struct em28xx_fh *fh = priv;
555 struct em28xx *dev = fh->dev;
556 unsigned int n;
557
558 n = i->index;
559 if (n >= MAX_EM28XX_INPUT)
560 return -EINVAL;
561 if (0 == INPUT(n)->type)
562 return -EINVAL;
563
564 i->index = n;
565 i->type = V4L2_INPUT_TYPE_CAMERA;
566
567 strcpy(i->name, iname[INPUT(n)->type]);
568
569 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
570 (EM28XX_VMUX_CABLE == INPUT(n)->type))
571 i->type = V4L2_INPUT_TYPE_TUNER;
572
573 i->std = dev->vdev->tvnorms;
574
575 return 0;
576 }
577
578 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
579 {
580 struct em28xx_fh *fh = priv;
581 struct em28xx *dev = fh->dev;
582
583 *i = dev->ctl_input;
584
585 return 0;
586 }
587
588 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
589 {
590 struct em28xx_fh *fh = priv;
591 struct em28xx *dev = fh->dev;
592 int rc;
593
594 rc = check_dev(dev);
595 if (rc < 0)
596 return rc;
597
598 if (i >= MAX_EM28XX_INPUT)
599 return -EINVAL;
600 if (0 == INPUT(i)->type)
601 return -EINVAL;
602
603 mutex_lock(&dev->lock);
604
605 video_mux(dev, i);
606
607 mutex_unlock(&dev->lock);
608 return 0;
609 }
610
611 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
612 {
613 struct em28xx_fh *fh = priv;
614 struct em28xx *dev = fh->dev;
615 unsigned int index = a->index;
616
617 if (a->index > 1)
618 return -EINVAL;
619
620 index = dev->ctl_ainput;
621
622 if (index == 0) {
623 strcpy(a->name, "Television");
624 } else {
625 strcpy(a->name, "Line In");
626 }
627 a->capability = V4L2_AUDCAP_STEREO;
628 a->index = index;
629
630 return 0;
631 }
632
633 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
634 {
635 struct em28xx_fh *fh = priv;
636 struct em28xx *dev = fh->dev;
637
638 if (a->index != dev->ctl_ainput)
639 return -EINVAL;
640
641 return 0;
642 }
643
644 static int vidioc_queryctrl(struct file *file, void *priv,
645 struct v4l2_queryctrl *qc)
646 {
647 struct em28xx_fh *fh = priv;
648 struct em28xx *dev = fh->dev;
649 int id = qc->id;
650 int i;
651 int rc;
652
653 rc = check_dev(dev);
654 if (rc < 0)
655 return rc;
656
657 memset(qc, 0, sizeof(*qc));
658
659 qc->id = id;
660
661 if (!dev->has_msp34xx) {
662 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
663 if (qc->id && qc->id == em28xx_qctrl[i].id) {
664 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
665 return 0;
666 }
667 }
668 }
669 mutex_lock(&dev->lock);
670 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
671 mutex_unlock(&dev->lock);
672
673 if (qc->type)
674 return 0;
675 else
676 return -EINVAL;
677 }
678
679 static int vidioc_g_ctrl(struct file *file, void *priv,
680 struct v4l2_control *ctrl)
681 {
682 struct em28xx_fh *fh = priv;
683 struct em28xx *dev = fh->dev;
684 int rc;
685
686 rc = check_dev(dev);
687 if (rc < 0)
688 return rc;
689 mutex_lock(&dev->lock);
690
691 if (!dev->has_msp34xx)
692 rc = em28xx_get_ctrl(dev, ctrl);
693 else
694 rc = -EINVAL;
695
696 if (rc == -EINVAL) {
697 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
698 rc = 0;
699 }
700
701 mutex_unlock(&dev->lock);
702 return rc;
703 }
704
705 static int vidioc_s_ctrl(struct file *file, void *priv,
706 struct v4l2_control *ctrl)
707 {
708 struct em28xx_fh *fh = priv;
709 struct em28xx *dev = fh->dev;
710 u8 i;
711 int rc;
712
713 rc = check_dev(dev);
714 if (rc < 0)
715 return rc;
716
717 mutex_lock(&dev->lock);
718
719 if (dev->has_msp34xx)
720 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
721 else {
722 rc = 1;
723 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
724 if (ctrl->id == em28xx_qctrl[i].id) {
725 if (ctrl->value < em28xx_qctrl[i].minimum ||
726 ctrl->value > em28xx_qctrl[i].maximum) {
727 rc = -ERANGE;
728 break;
729 }
730
731 rc = em28xx_set_ctrl(dev, ctrl);
732 break;
733 }
734 }
735 }
736
737 /* Control not found - try to send it to the attached devices */
738 if (rc == 1) {
739 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
740 rc = 0;
741 }
742
743 mutex_unlock(&dev->lock);
744 return rc;
745 }
746
747 static int vidioc_g_tuner(struct file *file, void *priv,
748 struct v4l2_tuner *t)
749 {
750 struct em28xx_fh *fh = priv;
751 struct em28xx *dev = fh->dev;
752 int rc;
753
754 rc = check_dev(dev);
755 if (rc < 0)
756 return rc;
757
758 if (0 != t->index)
759 return -EINVAL;
760
761 strcpy(t->name, "Tuner");
762
763 mutex_lock(&dev->lock);
764
765 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
766
767 mutex_unlock(&dev->lock);
768 return 0;
769 }
770
771 static int vidioc_s_tuner(struct file *file, void *priv,
772 struct v4l2_tuner *t)
773 {
774 struct em28xx_fh *fh = priv;
775 struct em28xx *dev = fh->dev;
776 int rc;
777
778 rc = check_dev(dev);
779 if (rc < 0)
780 return rc;
781
782 if (0 != t->index)
783 return -EINVAL;
784
785 mutex_lock(&dev->lock);
786
787 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
788
789 mutex_unlock(&dev->lock);
790 return 0;
791 }
792
793 static int vidioc_g_frequency(struct file *file, void *priv,
794 struct v4l2_frequency *f)
795 {
796 struct em28xx_fh *fh = priv;
797 struct em28xx *dev = fh->dev;
798
799 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
800 f->frequency = dev->ctl_freq;
801
802 return 0;
803 }
804
805 static int vidioc_s_frequency(struct file *file, void *priv,
806 struct v4l2_frequency *f)
807 {
808 struct em28xx_fh *fh = priv;
809 struct em28xx *dev = fh->dev;
810 int rc;
811
812 rc = check_dev(dev);
813 if (rc < 0)
814 return rc;
815
816 if (0 != f->tuner)
817 return -EINVAL;
818
819 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
820 return -EINVAL;
821 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
822 return -EINVAL;
823
824 mutex_lock(&dev->lock);
825
826 dev->ctl_freq = f->frequency;
827 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
828
829 mutex_unlock(&dev->lock);
830 return 0;
831 }
832
833 static int vidioc_cropcap(struct file *file, void *priv,
834 struct v4l2_cropcap *cc)
835 {
836 struct em28xx_fh *fh = priv;
837 struct em28xx *dev = fh->dev;
838
839 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
840 return -EINVAL;
841
842 cc->bounds.left = 0;
843 cc->bounds.top = 0;
844 cc->bounds.width = dev->width;
845 cc->bounds.height = dev->height;
846 cc->defrect = cc->bounds;
847 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
848 cc->pixelaspect.denominator = 59;
849
850 return 0;
851 }
852
853 static int vidioc_streamon(struct file *file, void *priv,
854 enum v4l2_buf_type type)
855 {
856 struct em28xx_fh *fh = priv;
857 struct em28xx *dev = fh->dev;
858 int rc;
859
860 rc = check_dev(dev);
861 if (rc < 0)
862 return rc;
863
864 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
865 return -EINVAL;
866
867 if (list_empty(&dev->inqueue))
868 return -EINVAL;
869
870 mutex_lock(&dev->lock);
871
872 if (unlikely(res_get(fh) < 0)) {
873 mutex_unlock(&dev->lock);
874 return -EBUSY;
875 }
876
877 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
878
879 mutex_unlock(&dev->lock);
880 return 0;
881 }
882
883 static int vidioc_streamoff(struct file *file, void *priv,
884 enum v4l2_buf_type type)
885 {
886 struct em28xx_fh *fh = priv;
887 struct em28xx *dev = fh->dev;
888 int rc;
889
890 rc = check_dev(dev);
891 if (rc < 0)
892 return rc;
893
894 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
895 return -EINVAL;
896
897 mutex_lock(&dev->lock);
898
899 if (dev->stream == STREAM_ON) {
900 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
901 rc = em28xx_stream_interrupt(dev);
902 if (rc < 0) {
903 mutex_unlock(&dev->lock);
904 return rc;
905 }
906 }
907
908 em28xx_empty_framequeues(dev);
909
910 mutex_unlock(&dev->lock);
911 return 0;
912 }
913
914 static int vidioc_querycap(struct file *file, void *priv,
915 struct v4l2_capability *cap)
916 {
917 struct em28xx_fh *fh = priv;
918 struct em28xx *dev = fh->dev;
919
920 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
921 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
922 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
923
924 cap->version = EM28XX_VERSION_CODE;
925
926 cap->capabilities =
927 V4L2_CAP_SLICED_VBI_CAPTURE |
928 V4L2_CAP_VIDEO_CAPTURE |
929 V4L2_CAP_AUDIO |
930 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
931
932 if (dev->tuner_type != TUNER_ABSENT)
933 cap->capabilities |= V4L2_CAP_TUNER;
934
935 return 0;
936 }
937
938 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
939 struct v4l2_fmtdesc *fmtd)
940 {
941 if (fmtd->index != 0)
942 return -EINVAL;
943
944 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
945 strcpy(fmtd->description, "Packed YUY2");
946 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
947 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
948
949 return 0;
950 }
951
952 /* Sliced VBI ioctls */
953 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
954 struct v4l2_format *f)
955 {
956 struct em28xx_fh *fh = priv;
957 struct em28xx *dev = fh->dev;
958 int rc;
959
960 rc = check_dev(dev);
961 if (rc < 0)
962 return rc;
963
964 mutex_lock(&dev->lock);
965
966 f->fmt.sliced.service_set = 0;
967
968 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
969
970 if (f->fmt.sliced.service_set == 0)
971 rc = -EINVAL;
972
973 mutex_unlock(&dev->lock);
974 return rc;
975 }
976
977 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
978 struct v4l2_format *f)
979 {
980 struct em28xx_fh *fh = priv;
981 struct em28xx *dev = fh->dev;
982 int rc;
983
984 rc = check_dev(dev);
985 if (rc < 0)
986 return rc;
987
988 mutex_lock(&dev->lock);
989 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
990 mutex_unlock(&dev->lock);
991
992 if (f->fmt.sliced.service_set == 0)
993 return -EINVAL;
994
995 return 0;
996 }
997
998
999 static int vidioc_reqbufs(struct file *file, void *priv,
1000 struct v4l2_requestbuffers *rb)
1001 {
1002 struct em28xx_fh *fh = priv;
1003 struct em28xx *dev = fh->dev;
1004 u32 i;
1005 int rc;
1006
1007 rc = check_dev(dev);
1008 if (rc < 0)
1009 return rc;
1010
1011 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1012 rb->memory != V4L2_MEMORY_MMAP)
1013 return -EINVAL;
1014
1015 if (dev->io == IO_READ) {
1016 em28xx_videodbg("method is set to read;"
1017 " close and open the device again to"
1018 " choose the mmap I/O method\n");
1019 return -EINVAL;
1020 }
1021
1022 for (i = 0; i < dev->num_frames; i++)
1023 if (dev->frame[i].vma_use_count) {
1024 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1025 "previous buffers are still mapped\n");
1026 return -EINVAL;
1027 }
1028
1029 mutex_lock(&dev->lock);
1030
1031 if (dev->stream == STREAM_ON) {
1032 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1033 rc = em28xx_stream_interrupt(dev);
1034 if (rc < 0) {
1035 mutex_unlock(&dev->lock);
1036 return rc;
1037 }
1038 }
1039
1040 em28xx_empty_framequeues(dev);
1041
1042 em28xx_release_buffers(dev);
1043 if (rb->count)
1044 rb->count = em28xx_request_buffers(dev, rb->count);
1045
1046 dev->frame_current = NULL;
1047 dev->io = rb->count ? IO_MMAP : IO_NONE;
1048
1049 mutex_unlock(&dev->lock);
1050 return 0;
1051 }
1052
1053 static int vidioc_querybuf(struct file *file, void *priv,
1054 struct v4l2_buffer *b)
1055 {
1056 struct em28xx_fh *fh = priv;
1057 struct em28xx *dev = fh->dev;
1058 int rc;
1059
1060 rc = check_dev(dev);
1061 if (rc < 0)
1062 return rc;
1063
1064 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1065 b->index >= dev->num_frames || dev->io != IO_MMAP)
1066 return -EINVAL;
1067
1068 mutex_lock(&dev->lock);
1069
1070 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1071
1072 if (dev->frame[b->index].vma_use_count)
1073 b->flags |= V4L2_BUF_FLAG_MAPPED;
1074
1075 if (dev->frame[b->index].state == F_DONE)
1076 b->flags |= V4L2_BUF_FLAG_DONE;
1077 else if (dev->frame[b->index].state != F_UNUSED)
1078 b->flags |= V4L2_BUF_FLAG_QUEUED;
1079
1080 mutex_unlock(&dev->lock);
1081 return 0;
1082 }
1083
1084 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1085 {
1086 struct em28xx_fh *fh = priv;
1087 struct em28xx *dev = fh->dev;
1088 unsigned long lock_flags;
1089 int rc;
1090
1091 rc = check_dev(dev);
1092 if (rc < 0)
1093 return rc;
1094
1095 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1096 b->index >= dev->num_frames)
1097 return -EINVAL;
1098
1099 if (dev->frame[b->index].state != F_UNUSED)
1100 return -EAGAIN;
1101
1102 dev->frame[b->index].state = F_QUEUED;
1103
1104 /* add frame to fifo */
1105 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1106 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1107 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1108
1109 return 0;
1110 }
1111
1112 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1113 {
1114 struct em28xx_fh *fh = priv;
1115 struct em28xx *dev = fh->dev;
1116 int rc;
1117 struct em28xx_frame_t *f;
1118 unsigned long lock_flags;
1119
1120 rc = check_dev(dev);
1121 if (rc < 0)
1122 return rc;
1123
1124 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1125 return -EINVAL;
1126
1127 if (list_empty(&dev->outqueue)) {
1128 if (dev->stream == STREAM_OFF)
1129 return -EINVAL;
1130
1131 if (file->f_flags & O_NONBLOCK)
1132 return -EAGAIN;
1133
1134 rc = wait_event_interruptible(dev->wait_frame,
1135 (!list_empty(&dev->outqueue)) ||
1136 (dev->state & DEV_DISCONNECTED));
1137 if (rc)
1138 return rc;
1139
1140 if (dev->state & DEV_DISCONNECTED)
1141 return -ENODEV;
1142 }
1143
1144 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1145 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1146 list_del(dev->outqueue.next);
1147 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1148
1149 f->state = F_UNUSED;
1150 memcpy(b, &f->buf, sizeof(*b));
1151
1152 if (f->vma_use_count)
1153 b->flags |= V4L2_BUF_FLAG_MAPPED;
1154
1155 return 0;
1156 }
1157
1158 /* ----------------------------------------------------------- */
1159 /* RADIO ESPECIFIC IOCTLS */
1160 /* ----------------------------------------------------------- */
1161
1162 static int radio_querycap(struct file *file, void *priv,
1163 struct v4l2_capability *cap)
1164 {
1165 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1166
1167 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1168 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1169 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1170
1171 cap->version = EM28XX_VERSION_CODE;
1172 cap->capabilities = V4L2_CAP_TUNER;
1173 return 0;
1174 }
1175
1176 static int radio_g_tuner(struct file *file, void *priv,
1177 struct v4l2_tuner *t)
1178 {
1179 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1180
1181 if (unlikely(t->index > 0))
1182 return -EINVAL;
1183
1184 strcpy(t->name, "Radio");
1185 t->type = V4L2_TUNER_RADIO;
1186
1187 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1188 return 0;
1189 }
1190
1191 static int radio_enum_input(struct file *file, void *priv,
1192 struct v4l2_input *i)
1193 {
1194 if (i->index != 0)
1195 return -EINVAL;
1196 strcpy(i->name, "Radio");
1197 i->type = V4L2_INPUT_TYPE_TUNER;
1198
1199 return 0;
1200 }
1201
1202 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1203 {
1204 if (unlikely(a->index))
1205 return -EINVAL;
1206
1207 strcpy(a->name, "Radio");
1208 return 0;
1209 }
1210
1211 static int radio_s_tuner(struct file *file, void *priv,
1212 struct v4l2_tuner *t)
1213 {
1214 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1215
1216 if (0 != t->index)
1217 return -EINVAL;
1218
1219 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1220
1221 return 0;
1222 }
1223
1224 static int radio_s_audio(struct file *file, void *fh,
1225 struct v4l2_audio *a)
1226 {
1227 return 0;
1228 }
1229
1230 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1231 {
1232 return 0;
1233 }
1234
1235 static int radio_queryctrl(struct file *file, void *priv,
1236 struct v4l2_queryctrl *qc)
1237 {
1238 int i;
1239
1240 if (qc->id < V4L2_CID_BASE ||
1241 qc->id >= V4L2_CID_LASTP1)
1242 return -EINVAL;
1243
1244 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1245 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1246 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1247 return 0;
1248 }
1249 }
1250
1251 return -EINVAL;
1252 }
1253
1254 /*
1255 * em28xx_v4l2_open()
1256 * inits the device and starts isoc transfer
1257 */
1258 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1259 {
1260 int minor = iminor(inode);
1261 int errCode = 0, radio = 0;
1262 struct em28xx *h,*dev = NULL;
1263 struct em28xx_fh *fh;
1264
1265 list_for_each_entry(h, &em28xx_devlist, devlist) {
1266 if (h->vdev->minor == minor) {
1267 dev = h;
1268 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1269 }
1270 if (h->vbi_dev->minor == minor) {
1271 dev = h;
1272 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1273 }
1274 if (h->radio_dev &&
1275 h->radio_dev->minor == minor) {
1276 radio = 1;
1277 dev = h;
1278 }
1279 }
1280 if (NULL == dev)
1281 return -ENODEV;
1282
1283 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1284 minor,v4l2_type_names[dev->type],dev->users);
1285
1286 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1287
1288 if (!fh) {
1289 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1290 return -ENOMEM;
1291 }
1292 mutex_lock(&dev->lock);
1293 fh->dev = dev;
1294 fh->radio = radio;
1295 filp->private_data = fh;
1296
1297 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1298 em28xx_set_alternate(dev);
1299
1300 dev->width = norm_maxw(dev);
1301 dev->height = norm_maxh(dev);
1302 dev->frame_size = dev->width * dev->height * 2;
1303 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1304 dev->bytesperline = dev->width * 2;
1305 dev->hscale = 0;
1306 dev->vscale = 0;
1307
1308 em28xx_capture_start(dev, 1);
1309 em28xx_resolution_set(dev);
1310
1311
1312 /* start the transfer */
1313 errCode = em28xx_init_isoc(dev);
1314 if (errCode)
1315 goto err;
1316
1317 em28xx_empty_framequeues(dev);
1318 }
1319 if (fh->radio) {
1320 em28xx_videodbg("video_open: setting radio device\n");
1321 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1322 }
1323
1324 dev->users++;
1325
1326 err:
1327 mutex_unlock(&dev->lock);
1328 return errCode;
1329 }
1330
1331 /*
1332 * em28xx_realease_resources()
1333 * unregisters the v4l2,i2c and usb devices
1334 * called when the device gets disconected or at module unload
1335 */
1336 static void em28xx_release_resources(struct em28xx *dev)
1337 {
1338
1339 /*FIXME: I2C IR should be disconnected */
1340
1341 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1342 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1343 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1344 list_del(&dev->devlist);
1345 if (dev->radio_dev) {
1346 if (-1 != dev->radio_dev->minor)
1347 video_unregister_device(dev->radio_dev);
1348 else
1349 video_device_release(dev->radio_dev);
1350 dev->radio_dev = NULL;
1351 }
1352 if (dev->vbi_dev) {
1353 if (-1 != dev->vbi_dev->minor)
1354 video_unregister_device(dev->vbi_dev);
1355 else
1356 video_device_release(dev->vbi_dev);
1357 dev->vbi_dev = NULL;
1358 }
1359 if (dev->vdev) {
1360 if (-1 != dev->vdev->minor)
1361 video_unregister_device(dev->vdev);
1362 else
1363 video_device_release(dev->vdev);
1364 dev->vdev = NULL;
1365 }
1366 em28xx_i2c_unregister(dev);
1367 usb_put_dev(dev->udev);
1368
1369 /* Mark device as unused */
1370 em28xx_devused&=~(1<<dev->devno);
1371 }
1372
1373 /*
1374 * em28xx_v4l2_close()
1375 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1376 */
1377 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1378 {
1379 struct em28xx_fh *fh = filp->private_data;
1380 struct em28xx *dev = fh->dev;
1381 int errCode;
1382
1383 em28xx_videodbg("users=%d\n", dev->users);
1384
1385
1386 if (res_check(fh))
1387 res_free(fh);
1388
1389 mutex_lock(&dev->lock);
1390
1391 if (dev->users == 1) {
1392 em28xx_uninit_isoc(dev);
1393 em28xx_release_buffers(dev);
1394 dev->io = IO_NONE;
1395
1396 /* the device is already disconnect,
1397 free the remaining resources */
1398 if (dev->state & DEV_DISCONNECTED) {
1399 em28xx_release_resources(dev);
1400 mutex_unlock(&dev->lock);
1401 kfree(dev);
1402 return 0;
1403 }
1404
1405 /* set alternate 0 */
1406 dev->alt = 0;
1407 em28xx_videodbg("setting alternate 0\n");
1408 errCode = usb_set_interface(dev->udev, 0, 0);
1409 if (errCode < 0) {
1410 em28xx_errdev("cannot change alternate number to "
1411 "0 (error=%i)\n", errCode);
1412 }
1413 }
1414 kfree(fh);
1415 dev->users--;
1416 wake_up_interruptible_nr(&dev->open, 1);
1417 mutex_unlock(&dev->lock);
1418 return 0;
1419 }
1420
1421 /*
1422 * em28xx_v4l2_read()
1423 * will allocate buffers when called for the first time
1424 */
1425 static ssize_t
1426 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1427 loff_t * f_pos)
1428 {
1429 struct em28xx_frame_t *f, *i;
1430 unsigned long lock_flags;
1431 int ret = 0;
1432 struct em28xx_fh *fh = filp->private_data;
1433 struct em28xx *dev = fh->dev;
1434
1435 /* FIXME: read() is not prepared to allow changing the video
1436 resolution while streaming. Seems a bug at em28xx_set_fmt
1437 */
1438
1439 if (unlikely(res_get(fh) < 0))
1440 return -EBUSY;
1441
1442 mutex_lock(&dev->lock);
1443
1444 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1445 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1446
1447 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1448 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1449 em28xx_videodbg("not supported yet! ...\n");
1450 if (copy_to_user(buf, "", 1)) {
1451 mutex_unlock(&dev->lock);
1452 return -EFAULT;
1453 }
1454 mutex_unlock(&dev->lock);
1455 return (1);
1456 }
1457 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1458 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1459 em28xx_videodbg("not supported yet! ...\n");
1460 if (copy_to_user(buf, "", 1)) {
1461 mutex_unlock(&dev->lock);
1462 return -EFAULT;
1463 }
1464 mutex_unlock(&dev->lock);
1465 return (1);
1466 }
1467
1468 if (dev->state & DEV_DISCONNECTED) {
1469 em28xx_videodbg("device not present\n");
1470 mutex_unlock(&dev->lock);
1471 return -ENODEV;
1472 }
1473
1474 if (dev->state & DEV_MISCONFIGURED) {
1475 em28xx_videodbg("device misconfigured; close and open it again\n");
1476 mutex_unlock(&dev->lock);
1477 return -EIO;
1478 }
1479
1480 if (dev->io == IO_MMAP) {
1481 em28xx_videodbg ("IO method is set to mmap; close and open"
1482 " the device again to choose the read method\n");
1483 mutex_unlock(&dev->lock);
1484 return -EINVAL;
1485 }
1486
1487 if (dev->io == IO_NONE) {
1488 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1489 em28xx_errdev("read failed, not enough memory\n");
1490 mutex_unlock(&dev->lock);
1491 return -ENOMEM;
1492 }
1493 dev->io = IO_READ;
1494 dev->stream = STREAM_ON;
1495 em28xx_queue_unusedframes(dev);
1496 }
1497
1498 if (!count) {
1499 mutex_unlock(&dev->lock);
1500 return 0;
1501 }
1502
1503 if (list_empty(&dev->outqueue)) {
1504 if (filp->f_flags & O_NONBLOCK) {
1505 mutex_unlock(&dev->lock);
1506 return -EAGAIN;
1507 }
1508 ret = wait_event_interruptible
1509 (dev->wait_frame,
1510 (!list_empty(&dev->outqueue)) ||
1511 (dev->state & DEV_DISCONNECTED));
1512 if (ret) {
1513 mutex_unlock(&dev->lock);
1514 return ret;
1515 }
1516 if (dev->state & DEV_DISCONNECTED) {
1517 mutex_unlock(&dev->lock);
1518 return -ENODEV;
1519 }
1520 dev->video_bytesread = 0;
1521 }
1522
1523 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1524
1525 em28xx_queue_unusedframes(dev);
1526
1527 if (count > f->buf.length)
1528 count = f->buf.length;
1529
1530 if ((dev->video_bytesread + count) > dev->frame_size)
1531 count = dev->frame_size - dev->video_bytesread;
1532
1533 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1534 em28xx_err("Error while copying to user\n");
1535 return -EFAULT;
1536 }
1537 dev->video_bytesread += count;
1538
1539 if (dev->video_bytesread == dev->frame_size) {
1540 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1541 list_for_each_entry(i, &dev->outqueue, frame)
1542 i->state = F_UNUSED;
1543 INIT_LIST_HEAD(&dev->outqueue);
1544 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1545
1546 em28xx_queue_unusedframes(dev);
1547 dev->video_bytesread = 0;
1548 }
1549
1550 *f_pos += count;
1551
1552 mutex_unlock(&dev->lock);
1553
1554 return count;
1555 }
1556
1557 /*
1558 * em28xx_v4l2_poll()
1559 * will allocate buffers when called for the first time
1560 */
1561 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1562 {
1563 unsigned int mask = 0;
1564 struct em28xx_fh *fh = filp->private_data;
1565 struct em28xx *dev = fh->dev;
1566
1567 if (unlikely(res_get(fh) < 0))
1568 return POLLERR;
1569
1570 mutex_lock(&dev->lock);
1571
1572 if (dev->state & DEV_DISCONNECTED) {
1573 em28xx_videodbg("device not present\n");
1574 } else if (dev->state & DEV_MISCONFIGURED) {
1575 em28xx_videodbg("device is misconfigured; close and open it again\n");
1576 } else {
1577 if (dev->io == IO_NONE) {
1578 if (!em28xx_request_buffers
1579 (dev, EM28XX_NUM_READ_FRAMES)) {
1580 em28xx_warn
1581 ("poll() failed, not enough memory\n");
1582 } else {
1583 dev->io = IO_READ;
1584 dev->stream = STREAM_ON;
1585 }
1586 }
1587
1588 if (dev->io == IO_READ) {
1589 em28xx_queue_unusedframes(dev);
1590 poll_wait(filp, &dev->wait_frame, wait);
1591
1592 if (!list_empty(&dev->outqueue))
1593 mask |= POLLIN | POLLRDNORM;
1594
1595 mutex_unlock(&dev->lock);
1596
1597 return mask;
1598 }
1599 }
1600
1601 mutex_unlock(&dev->lock);
1602 return POLLERR;
1603 }
1604
1605 /*
1606 * em28xx_v4l2_mmap()
1607 */
1608 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1609 {
1610 struct em28xx_fh *fh = filp->private_data;
1611 struct em28xx *dev = fh->dev;
1612 unsigned long size = vma->vm_end - vma->vm_start;
1613 unsigned long start = vma->vm_start;
1614 void *pos;
1615 u32 i;
1616
1617 if (unlikely(res_get(fh) < 0))
1618 return -EBUSY;
1619
1620 mutex_lock(&dev->lock);
1621
1622 if (dev->state & DEV_DISCONNECTED) {
1623 em28xx_videodbg("mmap: device not present\n");
1624 mutex_unlock(&dev->lock);
1625 return -ENODEV;
1626 }
1627
1628 if (dev->state & DEV_MISCONFIGURED) {
1629 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1630 "open it again\n");
1631 mutex_unlock(&dev->lock);
1632 return -EIO;
1633 }
1634
1635 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1636 mutex_unlock(&dev->lock);
1637 return -EINVAL;
1638 }
1639
1640 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1641 size = PAGE_ALIGN(dev->frame[0].buf.length);
1642
1643 for (i = 0; i < dev->num_frames; i++) {
1644 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1645 break;
1646 }
1647 if (i == dev->num_frames) {
1648 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1649 mutex_unlock(&dev->lock);
1650 return -EINVAL;
1651 }
1652
1653 /* VM_IO is eventually going to replace PageReserved altogether */
1654 vma->vm_flags |= VM_IO;
1655 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1656
1657 pos = dev->frame[i].bufmem;
1658 while (size > 0) { /* size is page-aligned */
1659 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1660 em28xx_videodbg("mmap: vm_insert_page failed\n");
1661 mutex_unlock(&dev->lock);
1662 return -EAGAIN;
1663 }
1664 start += PAGE_SIZE;
1665 pos += PAGE_SIZE;
1666 size -= PAGE_SIZE;
1667 }
1668
1669 vma->vm_ops = &em28xx_vm_ops;
1670 vma->vm_private_data = &dev->frame[i];
1671
1672 em28xx_vm_open(vma);
1673 mutex_unlock(&dev->lock);
1674 return 0;
1675 }
1676
1677 static const struct file_operations em28xx_v4l_fops = {
1678 .owner = THIS_MODULE,
1679 .open = em28xx_v4l2_open,
1680 .release = em28xx_v4l2_close,
1681 .read = em28xx_v4l2_read,
1682 .poll = em28xx_v4l2_poll,
1683 .mmap = em28xx_v4l2_mmap,
1684 .ioctl = video_ioctl2,
1685 .llseek = no_llseek,
1686 .compat_ioctl = v4l_compat_ioctl32,
1687 };
1688
1689 static const struct file_operations radio_fops = {
1690 .owner = THIS_MODULE,
1691 .open = em28xx_v4l2_open,
1692 .release = em28xx_v4l2_close,
1693 .ioctl = video_ioctl2,
1694 .compat_ioctl = v4l_compat_ioctl32,
1695 .llseek = no_llseek,
1696 };
1697
1698 static const struct video_device em28xx_video_template = {
1699 .fops = &em28xx_v4l_fops,
1700 .release = video_device_release,
1701
1702 .minor = -1,
1703 .vidioc_querycap = vidioc_querycap,
1704 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1705 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1706 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1707 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1708 .vidioc_g_audio = vidioc_g_audio,
1709 .vidioc_s_audio = vidioc_s_audio,
1710 .vidioc_cropcap = vidioc_cropcap,
1711
1712 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1713 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1714 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1715
1716 .vidioc_reqbufs = vidioc_reqbufs,
1717 .vidioc_querybuf = vidioc_querybuf,
1718 .vidioc_qbuf = vidioc_qbuf,
1719 .vidioc_dqbuf = vidioc_dqbuf,
1720 .vidioc_s_std = vidioc_s_std,
1721 .vidioc_enum_input = vidioc_enum_input,
1722 .vidioc_g_input = vidioc_g_input,
1723 .vidioc_s_input = vidioc_s_input,
1724 .vidioc_queryctrl = vidioc_queryctrl,
1725 .vidioc_g_ctrl = vidioc_g_ctrl,
1726 .vidioc_s_ctrl = vidioc_s_ctrl,
1727 .vidioc_streamon = vidioc_streamon,
1728 .vidioc_streamoff = vidioc_streamoff,
1729 .vidioc_g_tuner = vidioc_g_tuner,
1730 .vidioc_s_tuner = vidioc_s_tuner,
1731 .vidioc_g_frequency = vidioc_g_frequency,
1732 .vidioc_s_frequency = vidioc_s_frequency,
1733
1734 .tvnorms = V4L2_STD_ALL,
1735 .current_norm = V4L2_STD_PAL,
1736 };
1737
1738 static struct video_device em28xx_radio_template = {
1739 .name = "em28xx-radio",
1740 .type = VID_TYPE_TUNER,
1741 .fops = &radio_fops,
1742 .minor = -1,
1743 .vidioc_querycap = radio_querycap,
1744 .vidioc_g_tuner = radio_g_tuner,
1745 .vidioc_enum_input = radio_enum_input,
1746 .vidioc_g_audio = radio_g_audio,
1747 .vidioc_s_tuner = radio_s_tuner,
1748 .vidioc_s_audio = radio_s_audio,
1749 .vidioc_s_input = radio_s_input,
1750 .vidioc_queryctrl = radio_queryctrl,
1751 .vidioc_g_ctrl = vidioc_g_ctrl,
1752 .vidioc_s_ctrl = vidioc_s_ctrl,
1753 .vidioc_g_frequency = vidioc_g_frequency,
1754 .vidioc_s_frequency = vidioc_s_frequency,
1755 };
1756
1757 /******************************** usb interface *****************************************/
1758
1759
1760 static LIST_HEAD(em28xx_extension_devlist);
1761 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1762
1763 int em28xx_register_extension(struct em28xx_ops *ops)
1764 {
1765 struct em28xx *h, *dev = NULL;
1766
1767 list_for_each_entry(h, &em28xx_devlist, devlist)
1768 dev = h;
1769
1770 mutex_lock(&em28xx_extension_devlist_lock);
1771 list_add_tail(&ops->next, &em28xx_extension_devlist);
1772 if (dev)
1773 ops->init(dev);
1774
1775 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1776 mutex_unlock(&em28xx_extension_devlist_lock);
1777
1778 return 0;
1779 }
1780 EXPORT_SYMBOL(em28xx_register_extension);
1781
1782 void em28xx_unregister_extension(struct em28xx_ops *ops)
1783 {
1784 struct em28xx *h, *dev = NULL;
1785
1786 list_for_each_entry(h, &em28xx_devlist, devlist)
1787 dev = h;
1788
1789 if (dev)
1790 ops->fini(dev);
1791
1792 mutex_lock(&em28xx_extension_devlist_lock);
1793 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1794 list_del(&ops->next);
1795 mutex_unlock(&em28xx_extension_devlist_lock);
1796 }
1797 EXPORT_SYMBOL(em28xx_unregister_extension);
1798
1799 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1800 const struct video_device *template,
1801 const int type,
1802 const char *type_name)
1803 {
1804 struct video_device *vfd;
1805
1806 vfd = video_device_alloc();
1807 if (NULL == vfd)
1808 return NULL;
1809 *vfd = *template;
1810 vfd->minor = -1;
1811 vfd->dev = &dev->udev->dev;
1812 vfd->release = video_device_release;
1813 vfd->type = type;
1814
1815 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1816 dev->name, type_name);
1817
1818 return vfd;
1819 }
1820
1821
1822 /*
1823 * em28xx_init_dev()
1824 * allocates and inits the device structs, registers i2c bus and v4l device
1825 */
1826 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1827 int minor)
1828 {
1829 struct em28xx_ops *ops = NULL;
1830 struct em28xx *dev = *devhandle;
1831 int retval = -ENOMEM;
1832 int errCode;
1833 unsigned int maxh, maxw;
1834
1835 dev->udev = udev;
1836 mutex_init(&dev->lock);
1837 spin_lock_init(&dev->queue_lock);
1838 init_waitqueue_head(&dev->open);
1839 init_waitqueue_head(&dev->wait_frame);
1840 init_waitqueue_head(&dev->wait_stream);
1841
1842 dev->em28xx_write_regs = em28xx_write_regs;
1843 dev->em28xx_read_reg = em28xx_read_reg;
1844 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1845 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1846 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1847 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1848
1849 errCode = em28xx_read_reg(dev, CHIPID_REG);
1850 if (errCode >= 0)
1851 em28xx_info("em28xx chip ID = %d\n", errCode);
1852
1853 em28xx_pre_card_setup(dev);
1854
1855 errCode = em28xx_config(dev);
1856 if (errCode) {
1857 em28xx_errdev("error configuring device\n");
1858 em28xx_devused &= ~(1<<dev->devno);
1859 kfree(dev);
1860 return -ENOMEM;
1861 }
1862
1863 /* register i2c bus */
1864 em28xx_i2c_register(dev);
1865
1866 /* Do board specific init and eeprom reading */
1867 em28xx_card_setup(dev);
1868
1869 /* Configure audio */
1870 em28xx_audio_analog_set(dev);
1871
1872 /* configure the device */
1873 em28xx_config_i2c(dev);
1874
1875 /* set default norm */
1876 dev->norm = em28xx_video_template.current_norm;
1877
1878 maxw = norm_maxw(dev);
1879 maxh = norm_maxh(dev);
1880
1881 /* set default image size */
1882 dev->width = maxw;
1883 dev->height = maxh;
1884 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1885 dev->field_size = dev->width * dev->height;
1886 dev->frame_size =
1887 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1888 dev->bytesperline = dev->width * 2;
1889 dev->hscale = 0;
1890 dev->vscale = 0;
1891 dev->ctl_input = 2;
1892
1893 errCode = em28xx_config(dev);
1894
1895 list_add_tail(&dev->devlist, &em28xx_devlist);
1896
1897 /* allocate and fill video video_device struct */
1898 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1899 VID_TYPE_CAPTURE, "video");
1900 if (NULL == dev->vdev) {
1901 em28xx_errdev("cannot allocate video_device.\n");
1902 goto fail_unreg;
1903 }
1904 if (dev->tuner_type != TUNER_ABSENT)
1905 dev->vdev->type |= VID_TYPE_TUNER;
1906
1907 /* register v4l2 video video_device */
1908 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1909 video_nr[dev->devno]);
1910 if (retval) {
1911 em28xx_errdev("unable to register video device (error=%i).\n",
1912 retval);
1913 goto fail_unreg;
1914 }
1915
1916 /* Allocate and fill vbi video_device struct */
1917 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1918 VFL_TYPE_VBI, "vbi");
1919 /* register v4l2 vbi video_device */
1920 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1921 vbi_nr[dev->devno]) < 0) {
1922 em28xx_errdev("unable to register vbi device\n");
1923 retval = -ENODEV;
1924 goto fail_unreg;
1925 }
1926
1927 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1928 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1929 VFL_TYPE_RADIO, "radio");
1930 if (NULL == dev->radio_dev) {
1931 em28xx_errdev("cannot allocate video_device.\n");
1932 goto fail_unreg;
1933 }
1934 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1935 radio_nr[dev->devno]);
1936 if (retval < 0) {
1937 em28xx_errdev("can't register radio device\n");
1938 goto fail_unreg;
1939 }
1940 em28xx_info("Registered radio device as /dev/radio%d\n",
1941 dev->radio_dev->minor & 0x1f);
1942 }
1943
1944
1945 if (dev->has_msp34xx) {
1946 /* Send a reset to other chips via gpio */
1947 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1948 msleep(3);
1949 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1950 msleep(3);
1951 }
1952
1953 video_mux(dev, 0);
1954
1955 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1956 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1957 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1958
1959 mutex_lock(&em28xx_extension_devlist_lock);
1960 if (!list_empty(&em28xx_extension_devlist)) {
1961 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1962 if (ops->id)
1963 ops->init(dev);
1964 }
1965 }
1966 mutex_unlock(&em28xx_extension_devlist_lock);
1967
1968 return 0;
1969
1970 fail_unreg:
1971 em28xx_release_resources(dev);
1972 mutex_unlock(&dev->lock);
1973 kfree(dev);
1974 return retval;
1975 }
1976
1977 #if defined(CONFIG_MODULES) && defined(MODULE)
1978 static void request_module_async(struct work_struct *work)
1979 {
1980 struct em28xx *dev = container_of(work,
1981 struct em28xx, request_module_wk);
1982
1983 if (dev->has_audio_class)
1984 request_module("snd-usb-audio");
1985 else
1986 request_module("em28xx-alsa");
1987 }
1988
1989 static void request_modules(struct em28xx *dev)
1990 {
1991 INIT_WORK(&dev->request_module_wk, request_module_async);
1992 schedule_work(&dev->request_module_wk);
1993 }
1994 #else
1995 #define request_modules(dev)
1996 #endif /* CONFIG_MODULES */
1997
1998 /*
1999 * em28xx_usb_probe()
2000 * checks for supported devices
2001 */
2002 static int em28xx_usb_probe(struct usb_interface *interface,
2003 const struct usb_device_id *id)
2004 {
2005 const struct usb_endpoint_descriptor *endpoint;
2006 struct usb_device *udev;
2007 struct usb_interface *uif;
2008 struct em28xx *dev = NULL;
2009 int retval = -ENODEV;
2010 int i, nr, ifnum;
2011
2012 udev = usb_get_dev(interface_to_usbdev(interface));
2013 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2014
2015 /* Check to see next free device and mark as used */
2016 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2017 em28xx_devused|=1<<nr;
2018
2019 /* Don't register audio interfaces */
2020 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2021 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2022 udev->descriptor.idVendor,udev->descriptor.idProduct,
2023 ifnum,
2024 interface->altsetting[0].desc.bInterfaceClass);
2025
2026 em28xx_devused&=~(1<<nr);
2027 return -ENODEV;
2028 }
2029
2030 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2031 udev->descriptor.idVendor,udev->descriptor.idProduct,
2032 ifnum,
2033 interface->altsetting[0].desc.bInterfaceClass);
2034
2035 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2036
2037 /* check if the device has the iso in endpoint at the correct place */
2038 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2039 USB_ENDPOINT_XFER_ISOC) {
2040 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2041 em28xx_devused&=~(1<<nr);
2042 return -ENODEV;
2043 }
2044 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2045 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2046 em28xx_devused&=~(1<<nr);
2047 return -ENODEV;
2048 }
2049
2050 if (nr >= EM28XX_MAXBOARDS) {
2051 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2052 em28xx_devused&=~(1<<nr);
2053 return -ENOMEM;
2054 }
2055
2056 /* allocate memory for our device state and initialize it */
2057 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2058 if (dev == NULL) {
2059 em28xx_err(DRIVER_NAME ": out of memory!\n");
2060 em28xx_devused&=~(1<<nr);
2061 return -ENOMEM;
2062 }
2063
2064 snprintf(dev->name, 29, "em28xx #%d", nr);
2065 dev->devno = nr;
2066 dev->model = id->driver_info;
2067
2068 /* Checks if audio is provided by some interface */
2069 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2070 uif = udev->config->interface[i];
2071 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2072 dev->has_audio_class = 1;
2073 break;
2074 }
2075 }
2076
2077 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2078 dev->has_audio_class ? "Has" : "Doesn't have");
2079
2080 /* compute alternate max packet sizes */
2081 uif = udev->actconfig->interface[0];
2082
2083 dev->num_alt=uif->num_altsetting;
2084 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2085 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2086 dev->alt_max_pkt_size = kmalloc(32*
2087 dev->num_alt,GFP_KERNEL);
2088 if (dev->alt_max_pkt_size == NULL) {
2089 em28xx_errdev("out of memory!\n");
2090 em28xx_devused&=~(1<<nr);
2091 kfree(dev);
2092 return -ENOMEM;
2093 }
2094
2095 for (i = 0; i < dev->num_alt ; i++) {
2096 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2097 wMaxPacketSize);
2098 dev->alt_max_pkt_size[i] =
2099 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2100 em28xx_info("Alternate setting %i, max size= %i\n",i,
2101 dev->alt_max_pkt_size[i]);
2102 }
2103
2104 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2105 dev->model = card[nr];
2106
2107 /* allocate device struct */
2108 retval = em28xx_init_dev(&dev, udev, nr);
2109 if (retval)
2110 return retval;
2111
2112 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2113
2114 /* save our data pointer in this interface device */
2115 usb_set_intfdata(interface, dev);
2116
2117 request_modules(dev);
2118
2119 return 0;
2120 }
2121
2122 /*
2123 * em28xx_usb_disconnect()
2124 * called when the device gets diconencted
2125 * video device will be unregistered on v4l2_close in case it is still open
2126 */
2127 static void em28xx_usb_disconnect(struct usb_interface *interface)
2128 {
2129 struct em28xx *dev;
2130 struct em28xx_ops *ops = NULL;
2131
2132 dev = usb_get_intfdata(interface);
2133 usb_set_intfdata(interface, NULL);
2134
2135 if (!dev)
2136 return;
2137
2138 em28xx_info("disconnecting %s\n", dev->vdev->name);
2139
2140 /* wait until all current v4l2 io is finished then deallocate resources */
2141 mutex_lock(&dev->lock);
2142
2143 wake_up_interruptible_all(&dev->open);
2144
2145 if (dev->users) {
2146 em28xx_warn
2147 ("device /dev/video%d is open! Deregistration and memory "
2148 "deallocation are deferred on close.\n",
2149 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2150
2151 dev->state |= DEV_MISCONFIGURED;
2152 em28xx_uninit_isoc(dev);
2153 dev->state |= DEV_DISCONNECTED;
2154 wake_up_interruptible(&dev->wait_frame);
2155 wake_up_interruptible(&dev->wait_stream);
2156 } else {
2157 dev->state |= DEV_DISCONNECTED;
2158 em28xx_release_resources(dev);
2159 }
2160 mutex_unlock(&dev->lock);
2161
2162 mutex_lock(&em28xx_extension_devlist_lock);
2163 if (!list_empty(&em28xx_extension_devlist)) {
2164 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2165 ops->fini(dev);
2166 }
2167 }
2168 mutex_unlock(&em28xx_extension_devlist_lock);
2169
2170 if (!dev->users) {
2171 kfree(dev->alt_max_pkt_size);
2172 kfree(dev);
2173 }
2174 }
2175
2176 static struct usb_driver em28xx_usb_driver = {
2177 .name = "em28xx",
2178 .probe = em28xx_usb_probe,
2179 .disconnect = em28xx_usb_disconnect,
2180 .id_table = em28xx_id_table,
2181 };
2182
2183 static int __init em28xx_module_init(void)
2184 {
2185 int result;
2186
2187 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2188 (EM28XX_VERSION_CODE >> 16) & 0xff,
2189 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2190 #ifdef SNAPSHOT
2191 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2192 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2193 #endif
2194
2195 /* register this driver with the USB subsystem */
2196 result = usb_register(&em28xx_usb_driver);
2197 if (result)
2198 em28xx_err(DRIVER_NAME
2199 " usb_register failed. Error number %d.\n", result);
2200
2201 return result;
2202 }
2203
2204 static void __exit em28xx_module_exit(void)
2205 {
2206 /* deregister this driver with the USB subsystem */
2207 usb_deregister(&em28xx_usb_driver);
2208 }
2209
2210 module_init(em28xx_module_init);
2211 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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