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V4L/DVB (6956): Add Radio support for em28xx
[GitHub/mt8127/android_kernel_alcatel_ttab.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
42 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
43 "Markus Rechberger <mrechberger@gmail.com>, " \
44 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
45 "Sascha Sommer <saschasommer@freenet.de>"
46
47 #define DRIVER_NAME "em28xx"
48 #define DRIVER_DESC "Empia em28xx based USB video device driver"
49 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
50
51 #define em28xx_videodbg(fmt, arg...) do {\
52 if (video_debug) \
53 printk(KERN_INFO "%s %s :"fmt, \
54 dev->name, __FUNCTION__ , ##arg); } while (0)
55
56 MODULE_AUTHOR(DRIVER_AUTHOR);
57 MODULE_DESCRIPTION(DRIVER_DESC);
58 MODULE_LICENSE("GPL");
59
60 static LIST_HEAD(em28xx_devlist);
61
62 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
63 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66
67 module_param_array(card, int, NULL, 0444);
68 module_param_array(video_nr, int, NULL, 0444);
69 module_param_array(vbi_nr, int, NULL, 0444);
70 module_param_array(radio_nr, int, NULL, 0444);
71 MODULE_PARM_DESC(card, "card type");
72 MODULE_PARM_DESC(video_nr, "video device numbers");
73 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
74 MODULE_PARM_DESC(radio_nr, "radio device numbers");
75
76 static unsigned int video_debug = 0;
77 module_param(video_debug,int,0644);
78 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
79
80 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
81 static unsigned long em28xx_devused;
82
83 /* supported controls */
84 /* Common to all boards */
85 static struct v4l2_queryctrl em28xx_qctrl[] = {
86 {
87 .id = V4L2_CID_AUDIO_VOLUME,
88 .type = V4L2_CTRL_TYPE_INTEGER,
89 .name = "Volume",
90 .minimum = 0x0,
91 .maximum = 0x1f,
92 .step = 0x1,
93 .default_value = 0x1f,
94 .flags = 0,
95 },{
96 .id = V4L2_CID_AUDIO_MUTE,
97 .type = V4L2_CTRL_TYPE_BOOLEAN,
98 .name = "Mute",
99 .minimum = 0,
100 .maximum = 1,
101 .step = 1,
102 .default_value = 1,
103 .flags = 0,
104 }
105 };
106
107 static struct usb_driver em28xx_usb_driver;
108
109
110 /********************* v4l2 interface ******************************************/
111
112 /*
113 * em28xx_config()
114 * inits registers with sane defaults
115 */
116 static int em28xx_config(struct em28xx *dev)
117 {
118
119 /* Sets I2C speed to 100 KHz */
120 if (!dev->is_em2800)
121 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
122
123 /* enable vbi capturing */
124
125 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
126 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
127 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
128
129 dev->mute = 1; /* maybe not the right place... */
130 dev->volume = 0x1f;
131
132 em28xx_outfmt_set_yuv422(dev);
133 em28xx_colorlevels_set_default(dev);
134 em28xx_compression_disable(dev);
135
136 return 0;
137 }
138
139 /*
140 * em28xx_config_i2c()
141 * configure i2c attached devices
142 */
143 static void em28xx_config_i2c(struct em28xx *dev)
144 {
145 struct v4l2_routing route;
146
147 route.input = INPUT(dev->ctl_input)->vmux;
148 route.output = 0;
149 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
150 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
151 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
152 }
153
154 /*
155 * em28xx_empty_framequeues()
156 * prepare queues for incoming and outgoing frames
157 */
158 static void em28xx_empty_framequeues(struct em28xx *dev)
159 {
160 u32 i;
161
162 INIT_LIST_HEAD(&dev->inqueue);
163 INIT_LIST_HEAD(&dev->outqueue);
164
165 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
166 dev->frame[i].state = F_UNUSED;
167 dev->frame[i].buf.bytesused = 0;
168 }
169 }
170
171 static void video_mux(struct em28xx *dev, int index)
172 {
173 struct v4l2_routing route;
174
175 route.input = INPUT(index)->vmux;
176 route.output = 0;
177 dev->ctl_input = index;
178 dev->ctl_ainput = INPUT(index)->amux;
179
180 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
181
182 if (dev->has_msp34xx) {
183 if (dev->i2s_speed)
184 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
185 route.input = dev->ctl_ainput;
186 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
187 /* Note: this is msp3400 specific */
188 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
189 }
190
191 em28xx_set_audio_source(dev);
192 }
193
194 /* Usage lock check functions */
195 static int res_get(struct em28xx_fh *fh)
196 {
197 struct em28xx *dev = fh->dev;
198 int rc = 0;
199
200 /* This instance already has stream_on */
201 if (fh->stream_on)
202 return rc;
203
204 mutex_lock(&dev->lock);
205
206 if (dev->stream_on)
207 rc = -EINVAL;
208 else {
209 dev->stream_on = 1;
210 fh->stream_on = 1;
211 }
212
213 mutex_unlock(&dev->lock);
214 return rc;
215 }
216
217 static int res_check(struct em28xx_fh *fh)
218 {
219 return (fh->stream_on);
220 }
221
222 static void res_free(struct em28xx_fh *fh)
223 {
224 struct em28xx *dev = fh->dev;
225
226 mutex_lock(&dev->lock);
227 fh->stream_on = 0;
228 dev->stream_on = 0;
229 mutex_unlock(&dev->lock);
230 }
231
232 /*
233 * em28xx_vm_open()
234 */
235 static void em28xx_vm_open(struct vm_area_struct *vma)
236 {
237 struct em28xx_frame_t *f = vma->vm_private_data;
238 f->vma_use_count++;
239 }
240
241 /*
242 * em28xx_vm_close()
243 */
244 static void em28xx_vm_close(struct vm_area_struct *vma)
245 {
246 /* NOTE: buffers are not freed here */
247 struct em28xx_frame_t *f = vma->vm_private_data;
248
249 if (f->vma_use_count)
250 f->vma_use_count--;
251 }
252
253 static struct vm_operations_struct em28xx_vm_ops = {
254 .open = em28xx_vm_open,
255 .close = em28xx_vm_close,
256 };
257
258
259 /*
260 * em28xx_get_ctrl()
261 * return the current saturation, brightness or contrast, mute state
262 */
263 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
264 {
265 switch (ctrl->id) {
266 case V4L2_CID_AUDIO_MUTE:
267 ctrl->value = dev->mute;
268 return 0;
269 case V4L2_CID_AUDIO_VOLUME:
270 ctrl->value = dev->volume;
271 return 0;
272 default:
273 return -EINVAL;
274 }
275 }
276
277 /*
278 * em28xx_set_ctrl()
279 * mute or set new saturation, brightness or contrast
280 */
281 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
282 {
283 switch (ctrl->id) {
284 case V4L2_CID_AUDIO_MUTE:
285 if (ctrl->value != dev->mute) {
286 dev->mute = ctrl->value;
287 return em28xx_audio_analog_set(dev);
288 }
289 return 0;
290 case V4L2_CID_AUDIO_VOLUME:
291 dev->volume = ctrl->value;
292 return em28xx_audio_analog_set(dev);
293 default:
294 return -EINVAL;
295 }
296 }
297
298 /*
299 * em28xx_stream_interrupt()
300 * stops streaming
301 */
302 static int em28xx_stream_interrupt(struct em28xx *dev)
303 {
304 int rc = 0;
305
306 /* stop reading from the device */
307
308 dev->stream = STREAM_INTERRUPT;
309 rc = wait_event_timeout(dev->wait_stream,
310 (dev->stream == STREAM_OFF) ||
311 (dev->state & DEV_DISCONNECTED),
312 EM28XX_URB_TIMEOUT);
313
314 if (rc) {
315 dev->state |= DEV_MISCONFIGURED;
316 em28xx_videodbg("device is misconfigured; close and "
317 "open /dev/video%d again\n",
318 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
319 return rc;
320 }
321
322 return 0;
323 }
324
325
326 static int check_dev(struct em28xx *dev)
327 {
328 if (dev->state & DEV_DISCONNECTED) {
329 em28xx_errdev("v4l2 ioctl: device not present\n");
330 return -ENODEV;
331 }
332
333 if (dev->state & DEV_MISCONFIGURED) {
334 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
335 "close and open it again\n");
336 return -EIO;
337 }
338 return 0;
339 }
340
341 static void get_scale(struct em28xx *dev,
342 unsigned int width, unsigned int height,
343 unsigned int *hscale, unsigned int *vscale)
344 {
345 unsigned int maxw = norm_maxw(dev);
346 unsigned int maxh = norm_maxh(dev);
347
348 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
349 if (*hscale >= 0x4000)
350 *hscale = 0x3fff;
351
352 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
353 if (*vscale >= 0x4000)
354 *vscale = 0x3fff;
355 }
356
357 /* ------------------------------------------------------------------
358 IOCTL vidioc handling
359 ------------------------------------------------------------------*/
360
361 static int vidioc_g_fmt_cap(struct file *file, void *priv,
362 struct v4l2_format *f)
363 {
364 struct em28xx_fh *fh = priv;
365 struct em28xx *dev = fh->dev;
366
367 mutex_lock(&dev->lock);
368
369 f->fmt.pix.width = dev->width;
370 f->fmt.pix.height = dev->height;
371 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
372 f->fmt.pix.bytesperline = dev->bytesperline;
373 f->fmt.pix.sizeimage = dev->frame_size;
374 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
375
376 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
377 f->fmt.pix.field = dev->interlaced ?
378 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
379
380 mutex_unlock(&dev->lock);
381 return 0;
382 }
383
384 static int vidioc_try_fmt_cap(struct file *file, void *priv,
385 struct v4l2_format *f)
386 {
387 struct em28xx_fh *fh = priv;
388 struct em28xx *dev = fh->dev;
389 int width = f->fmt.pix.width;
390 int height = f->fmt.pix.height;
391 unsigned int maxw = norm_maxw(dev);
392 unsigned int maxh = norm_maxh(dev);
393 unsigned int hscale, vscale;
394
395 /* width must even because of the YUYV format
396 height must be even because of interlacing */
397 height &= 0xfffe;
398 width &= 0xfffe;
399
400 if (height < 32)
401 height = 32;
402 if (height > maxh)
403 height = maxh;
404 if (width < 48)
405 width = 48;
406 if (width > maxw)
407 width = maxw;
408
409 mutex_lock(&dev->lock);
410
411 if (dev->is_em2800) {
412 /* the em2800 can only scale down to 50% */
413 if (height % (maxh / 2))
414 height = maxh;
415 if (width % (maxw / 2))
416 width = maxw;
417 /* according to empiatech support */
418 /* the MaxPacketSize is to small to support */
419 /* framesizes larger than 640x480 @ 30 fps */
420 /* or 640x576 @ 25 fps. As this would cut */
421 /* of a part of the image we prefer */
422 /* 360x576 or 360x480 for now */
423 if (width == maxw && height == maxh)
424 width /= 2;
425 }
426
427 get_scale(dev, width, height, &hscale, &vscale);
428
429 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
430 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
431
432 f->fmt.pix.width = width;
433 f->fmt.pix.height = height;
434 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
435 f->fmt.pix.bytesperline = width * 2;
436 f->fmt.pix.sizeimage = width * 2 * height;
437 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
438 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
439
440 mutex_unlock(&dev->lock);
441 return 0;
442 }
443
444 static int vidioc_s_fmt_cap(struct file *file, void *priv,
445 struct v4l2_format *f)
446 {
447 struct em28xx_fh *fh = priv;
448 struct em28xx *dev = fh->dev;
449 int rc, i;
450
451 rc = check_dev(dev);
452 if (rc < 0)
453 return rc;
454
455 vidioc_try_fmt_cap(file, priv, f);
456
457 mutex_lock(&dev->lock);
458
459 for (i = 0; i < dev->num_frames; i++)
460 if (dev->frame[i].vma_use_count) {
461 em28xx_videodbg("VIDIOC_S_FMT failed. "
462 "Unmap the buffers first.\n");
463 rc = -EINVAL;
464 goto err;
465 }
466
467 /* stop io in case it is already in progress */
468 if (dev->stream == STREAM_ON) {
469 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
470 rc = em28xx_stream_interrupt(dev);
471 if (rc < 0)
472 goto err;
473 }
474
475 em28xx_release_buffers(dev);
476 dev->io = IO_NONE;
477
478 /* set new image size */
479 dev->width = f->fmt.pix.width;
480 dev->height = f->fmt.pix.height;
481 dev->frame_size = dev->width * dev->height * 2;
482 dev->field_size = dev->frame_size >> 1;
483 dev->bytesperline = dev->width * 2;
484 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
485
486 /* FIXME: This is really weird! Why capture is starting with
487 this ioctl ???
488 */
489 em28xx_uninit_isoc(dev);
490 em28xx_set_alternate(dev);
491 em28xx_capture_start(dev, 1);
492 em28xx_resolution_set(dev);
493 em28xx_init_isoc(dev);
494 rc = 0;
495
496 err:
497 mutex_unlock(&dev->lock);
498 return rc;
499 }
500
501 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
502 {
503 struct em28xx_fh *fh = priv;
504 struct em28xx *dev = fh->dev;
505 struct v4l2_format f;
506 int rc;
507
508 rc = check_dev(dev);
509 if (rc < 0)
510 return rc;
511
512 mutex_lock(&dev->lock);
513 dev->norm = *norm;
514 mutex_unlock(&dev->lock);
515
516 /* Adjusts width/height, if needed */
517 f.fmt.pix.width = dev->width;
518 f.fmt.pix.height = dev->height;
519 vidioc_try_fmt_cap(file, priv, &f);
520
521 mutex_lock(&dev->lock);
522
523 /* set new image size */
524 dev->width = f.fmt.pix.width;
525 dev->height = f.fmt.pix.height;
526 dev->frame_size = dev->width * dev->height * 2;
527 dev->field_size = dev->frame_size >> 1;
528 dev->bytesperline = dev->width * 2;
529 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
530
531 em28xx_resolution_set(dev);
532 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
533
534 mutex_unlock(&dev->lock);
535 return 0;
536 }
537
538 static const char *iname[] = {
539 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
540 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
541 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
542 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
543 [EM28XX_VMUX_SVIDEO] = "S-Video",
544 [EM28XX_VMUX_TELEVISION] = "Television",
545 [EM28XX_VMUX_CABLE] = "Cable TV",
546 [EM28XX_VMUX_DVB] = "DVB",
547 [EM28XX_VMUX_DEBUG] = "for debug only",
548 };
549
550 static int vidioc_enum_input(struct file *file, void *priv,
551 struct v4l2_input *i)
552 {
553 struct em28xx_fh *fh = priv;
554 struct em28xx *dev = fh->dev;
555 unsigned int n;
556
557 n = i->index;
558 if (n >= MAX_EM28XX_INPUT)
559 return -EINVAL;
560 if (0 == INPUT(n)->type)
561 return -EINVAL;
562
563 i->index = n;
564 i->type = V4L2_INPUT_TYPE_CAMERA;
565
566 strcpy(i->name, iname[INPUT(n)->type]);
567
568 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
569 (EM28XX_VMUX_CABLE == INPUT(n)->type))
570 i->type = V4L2_INPUT_TYPE_TUNER;
571
572 i->std = dev->vdev->tvnorms;
573
574 return 0;
575 }
576
577 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
578 {
579 struct em28xx_fh *fh = priv;
580 struct em28xx *dev = fh->dev;
581
582 *i = dev->ctl_input;
583
584 return 0;
585 }
586
587 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
588 {
589 struct em28xx_fh *fh = priv;
590 struct em28xx *dev = fh->dev;
591 int rc;
592
593 rc = check_dev(dev);
594 if (rc < 0)
595 return rc;
596
597 if (i >= MAX_EM28XX_INPUT)
598 return -EINVAL;
599 if (0 == INPUT(i)->type)
600 return -EINVAL;
601
602 mutex_lock(&dev->lock);
603
604 video_mux(dev, i);
605
606 mutex_unlock(&dev->lock);
607 return 0;
608 }
609
610 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
611 {
612 struct em28xx_fh *fh = priv;
613 struct em28xx *dev = fh->dev;
614 unsigned int index = a->index;
615
616 if (a->index > 1)
617 return -EINVAL;
618
619 index = dev->ctl_ainput;
620
621 if (index == 0) {
622 strcpy(a->name, "Television");
623 } else {
624 strcpy(a->name, "Line In");
625 }
626 a->capability = V4L2_AUDCAP_STEREO;
627 a->index = index;
628
629 return 0;
630 }
631
632 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
633 {
634 struct em28xx_fh *fh = priv;
635 struct em28xx *dev = fh->dev;
636
637 if (a->index != dev->ctl_ainput)
638 return -EINVAL;
639
640 return 0;
641 }
642
643 static int vidioc_queryctrl(struct file *file, void *priv,
644 struct v4l2_queryctrl *qc)
645 {
646 struct em28xx_fh *fh = priv;
647 struct em28xx *dev = fh->dev;
648 int id = qc->id;
649 int i;
650 int rc;
651
652 rc = check_dev(dev);
653 if (rc < 0)
654 return rc;
655
656 memset(qc, 0, sizeof(*qc));
657
658 qc->id = id;
659
660 if (!dev->has_msp34xx) {
661 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
662 if (qc->id && qc->id == em28xx_qctrl[i].id) {
663 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
664 return 0;
665 }
666 }
667 }
668 mutex_lock(&dev->lock);
669 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
670 mutex_unlock(&dev->lock);
671
672 if (qc->type)
673 return 0;
674 else
675 return -EINVAL;
676 }
677
678 static int vidioc_g_ctrl(struct file *file, void *priv,
679 struct v4l2_control *ctrl)
680 {
681 struct em28xx_fh *fh = priv;
682 struct em28xx *dev = fh->dev;
683 int rc;
684
685 rc = check_dev(dev);
686 if (rc < 0)
687 return rc;
688 mutex_lock(&dev->lock);
689
690 if (!dev->has_msp34xx)
691 rc = em28xx_get_ctrl(dev, ctrl);
692 else
693 rc = -EINVAL;
694
695 if (rc == -EINVAL) {
696 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
697 rc = 0;
698 }
699
700 mutex_unlock(&dev->lock);
701 return rc;
702 }
703
704 static int vidioc_s_ctrl(struct file *file, void *priv,
705 struct v4l2_control *ctrl)
706 {
707 struct em28xx_fh *fh = priv;
708 struct em28xx *dev = fh->dev;
709 u8 i;
710 int rc;
711
712 rc = check_dev(dev);
713 if (rc < 0)
714 return rc;
715
716 mutex_lock(&dev->lock);
717
718 if (dev->has_msp34xx)
719 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
720 else {
721 rc = 1;
722 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
723 if (ctrl->id == em28xx_qctrl[i].id) {
724 if (ctrl->value < em28xx_qctrl[i].minimum ||
725 ctrl->value > em28xx_qctrl[i].maximum) {
726 rc = -ERANGE;
727 break;
728 }
729
730 rc = em28xx_set_ctrl(dev, ctrl);
731 break;
732 }
733 }
734 }
735
736 /* Control not found - try to send it to the attached devices */
737 if (rc == 1) {
738 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
739 rc = 0;
740 }
741
742 mutex_unlock(&dev->lock);
743 return rc;
744 }
745
746 static int vidioc_g_tuner(struct file *file, void *priv,
747 struct v4l2_tuner *t)
748 {
749 struct em28xx_fh *fh = priv;
750 struct em28xx *dev = fh->dev;
751 int rc;
752
753 rc = check_dev(dev);
754 if (rc < 0)
755 return rc;
756
757 if (0 != t->index)
758 return -EINVAL;
759
760 strcpy(t->name, "Tuner");
761
762 mutex_lock(&dev->lock);
763
764 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
765
766 mutex_unlock(&dev->lock);
767 return 0;
768 }
769
770 static int vidioc_s_tuner(struct file *file, void *priv,
771 struct v4l2_tuner *t)
772 {
773 struct em28xx_fh *fh = priv;
774 struct em28xx *dev = fh->dev;
775 int rc;
776
777 rc = check_dev(dev);
778 if (rc < 0)
779 return rc;
780
781 if (0 != t->index)
782 return -EINVAL;
783
784 mutex_lock(&dev->lock);
785
786 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
787
788 mutex_unlock(&dev->lock);
789 return 0;
790 }
791
792 static int vidioc_g_frequency(struct file *file, void *priv,
793 struct v4l2_frequency *f)
794 {
795 struct em28xx_fh *fh = priv;
796 struct em28xx *dev = fh->dev;
797
798 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
799 f->frequency = dev->ctl_freq;
800
801 return 0;
802 }
803
804 static int vidioc_s_frequency(struct file *file, void *priv,
805 struct v4l2_frequency *f)
806 {
807 struct em28xx_fh *fh = priv;
808 struct em28xx *dev = fh->dev;
809 int rc;
810
811 rc = check_dev(dev);
812 if (rc < 0)
813 return rc;
814
815 if (0 != f->tuner)
816 return -EINVAL;
817
818 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
819 return -EINVAL;
820 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
821 return -EINVAL;
822
823 mutex_lock(&dev->lock);
824
825 dev->ctl_freq = f->frequency;
826 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
827
828 mutex_unlock(&dev->lock);
829 return 0;
830 }
831
832 static int vidioc_cropcap(struct file *file, void *priv,
833 struct v4l2_cropcap *cc)
834 {
835 struct em28xx_fh *fh = priv;
836 struct em28xx *dev = fh->dev;
837
838 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
839 return -EINVAL;
840
841 cc->bounds.left = 0;
842 cc->bounds.top = 0;
843 cc->bounds.width = dev->width;
844 cc->bounds.height = dev->height;
845 cc->defrect = cc->bounds;
846 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
847 cc->pixelaspect.denominator = 59;
848
849 return 0;
850 }
851
852 static int vidioc_streamon(struct file *file, void *priv,
853 enum v4l2_buf_type type)
854 {
855 struct em28xx_fh *fh = priv;
856 struct em28xx *dev = fh->dev;
857 int rc;
858
859 rc = check_dev(dev);
860 if (rc < 0)
861 return rc;
862
863 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
864 return -EINVAL;
865
866 if (list_empty(&dev->inqueue))
867 return -EINVAL;
868
869 mutex_lock(&dev->lock);
870
871 if (unlikely(res_get(fh) < 0)) {
872 mutex_unlock(&dev->lock);
873 return -EBUSY;
874 }
875
876 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
877
878 mutex_unlock(&dev->lock);
879 return 0;
880 }
881
882 static int vidioc_streamoff(struct file *file, void *priv,
883 enum v4l2_buf_type type)
884 {
885 struct em28xx_fh *fh = priv;
886 struct em28xx *dev = fh->dev;
887 int rc;
888
889 rc = check_dev(dev);
890 if (rc < 0)
891 return rc;
892
893 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
894 return -EINVAL;
895
896 mutex_lock(&dev->lock);
897
898 if (dev->stream == STREAM_ON) {
899 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
900 rc = em28xx_stream_interrupt(dev);
901 if (rc < 0) {
902 mutex_unlock(&dev->lock);
903 return rc;
904 }
905 }
906
907 em28xx_empty_framequeues(dev);
908
909 mutex_unlock(&dev->lock);
910 return 0;
911 }
912
913 static int vidioc_querycap(struct file *file, void *priv,
914 struct v4l2_capability *cap)
915 {
916 struct em28xx_fh *fh = priv;
917 struct em28xx *dev = fh->dev;
918
919 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
920 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
921 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
922
923 cap->version = EM28XX_VERSION_CODE;
924
925 cap->capabilities =
926 V4L2_CAP_SLICED_VBI_CAPTURE |
927 V4L2_CAP_VIDEO_CAPTURE |
928 V4L2_CAP_AUDIO |
929 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
930
931 if (dev->has_tuner)
932 cap->capabilities |= V4L2_CAP_TUNER;
933
934 return 0;
935 }
936
937 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
938 struct v4l2_fmtdesc *fmtd)
939 {
940 if (fmtd->index != 0)
941 return -EINVAL;
942
943 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
944 strcpy(fmtd->description, "Packed YUY2");
945 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
946 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
947
948 return 0;
949 }
950
951 /* Sliced VBI ioctls */
952 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
953 struct v4l2_format *f)
954 {
955 struct em28xx_fh *fh = priv;
956 struct em28xx *dev = fh->dev;
957 int rc;
958
959 rc = check_dev(dev);
960 if (rc < 0)
961 return rc;
962
963 mutex_lock(&dev->lock);
964
965 f->fmt.sliced.service_set = 0;
966
967 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
968
969 if (f->fmt.sliced.service_set == 0)
970 rc = -EINVAL;
971
972 mutex_unlock(&dev->lock);
973 return rc;
974 }
975
976 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
977 struct v4l2_format *f)
978 {
979 struct em28xx_fh *fh = priv;
980 struct em28xx *dev = fh->dev;
981 int rc;
982
983 rc = check_dev(dev);
984 if (rc < 0)
985 return rc;
986
987 mutex_lock(&dev->lock);
988 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
989 mutex_unlock(&dev->lock);
990
991 if (f->fmt.sliced.service_set == 0)
992 return -EINVAL;
993
994 return 0;
995 }
996
997
998 static int vidioc_reqbufs(struct file *file, void *priv,
999 struct v4l2_requestbuffers *rb)
1000 {
1001 struct em28xx_fh *fh = priv;
1002 struct em28xx *dev = fh->dev;
1003 u32 i;
1004 int rc;
1005
1006 rc = check_dev(dev);
1007 if (rc < 0)
1008 return rc;
1009
1010 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1011 rb->memory != V4L2_MEMORY_MMAP)
1012 return -EINVAL;
1013
1014 if (dev->io == IO_READ) {
1015 em28xx_videodbg("method is set to read;"
1016 " close and open the device again to"
1017 " choose the mmap I/O method\n");
1018 return -EINVAL;
1019 }
1020
1021 for (i = 0; i < dev->num_frames; i++)
1022 if (dev->frame[i].vma_use_count) {
1023 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1024 "previous buffers are still mapped\n");
1025 return -EINVAL;
1026 }
1027
1028 mutex_lock(&dev->lock);
1029
1030 if (dev->stream == STREAM_ON) {
1031 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1032 rc = em28xx_stream_interrupt(dev);
1033 if (rc < 0) {
1034 mutex_unlock(&dev->lock);
1035 return rc;
1036 }
1037 }
1038
1039 em28xx_empty_framequeues(dev);
1040
1041 em28xx_release_buffers(dev);
1042 if (rb->count)
1043 rb->count = em28xx_request_buffers(dev, rb->count);
1044
1045 dev->frame_current = NULL;
1046 dev->io = rb->count ? IO_MMAP : IO_NONE;
1047
1048 mutex_unlock(&dev->lock);
1049 return 0;
1050 }
1051
1052 static int vidioc_querybuf(struct file *file, void *priv,
1053 struct v4l2_buffer *b)
1054 {
1055 struct em28xx_fh *fh = priv;
1056 struct em28xx *dev = fh->dev;
1057 int rc;
1058
1059 rc = check_dev(dev);
1060 if (rc < 0)
1061 return rc;
1062
1063 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1064 b->index >= dev->num_frames || dev->io != IO_MMAP)
1065 return -EINVAL;
1066
1067 mutex_lock(&dev->lock);
1068
1069 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1070
1071 if (dev->frame[b->index].vma_use_count)
1072 b->flags |= V4L2_BUF_FLAG_MAPPED;
1073
1074 if (dev->frame[b->index].state == F_DONE)
1075 b->flags |= V4L2_BUF_FLAG_DONE;
1076 else if (dev->frame[b->index].state != F_UNUSED)
1077 b->flags |= V4L2_BUF_FLAG_QUEUED;
1078
1079 mutex_unlock(&dev->lock);
1080 return 0;
1081 }
1082
1083 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1084 {
1085 struct em28xx_fh *fh = priv;
1086 struct em28xx *dev = fh->dev;
1087 unsigned long lock_flags;
1088 int rc;
1089
1090 rc = check_dev(dev);
1091 if (rc < 0)
1092 return rc;
1093
1094 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1095 b->index >= dev->num_frames)
1096 return -EINVAL;
1097
1098 if (dev->frame[b->index].state != F_UNUSED)
1099 return -EAGAIN;
1100
1101 dev->frame[b->index].state = F_QUEUED;
1102
1103 /* add frame to fifo */
1104 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1105 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1106 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1107
1108 return 0;
1109 }
1110
1111 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1112 {
1113 struct em28xx_fh *fh = priv;
1114 struct em28xx *dev = fh->dev;
1115 int rc;
1116 struct em28xx_frame_t *f;
1117 unsigned long lock_flags;
1118
1119 rc = check_dev(dev);
1120 if (rc < 0)
1121 return rc;
1122
1123 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1124 return -EINVAL;
1125
1126 if (list_empty(&dev->outqueue)) {
1127 if (dev->stream == STREAM_OFF)
1128 return -EINVAL;
1129
1130 if (file->f_flags & O_NONBLOCK)
1131 return -EAGAIN;
1132
1133 rc = wait_event_interruptible(dev->wait_frame,
1134 (!list_empty(&dev->outqueue)) ||
1135 (dev->state & DEV_DISCONNECTED));
1136 if (rc)
1137 return rc;
1138
1139 if (dev->state & DEV_DISCONNECTED)
1140 return -ENODEV;
1141 }
1142
1143 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1144 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1145 list_del(dev->outqueue.next);
1146 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1147
1148 f->state = F_UNUSED;
1149 memcpy(b, &f->buf, sizeof(*b));
1150
1151 if (f->vma_use_count)
1152 b->flags |= V4L2_BUF_FLAG_MAPPED;
1153
1154 return 0;
1155 }
1156
1157 /* ----------------------------------------------------------- */
1158 /* RADIO ESPECIFIC IOCTLS */
1159 /* ----------------------------------------------------------- */
1160
1161 static int radio_querycap(struct file *file, void *priv,
1162 struct v4l2_capability *cap)
1163 {
1164 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1165
1166 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1167 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1168 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1169
1170 cap->version = EM28XX_VERSION_CODE;
1171 cap->capabilities = V4L2_CAP_TUNER;
1172 return 0;
1173 }
1174
1175 static int radio_g_tuner(struct file *file, void *priv,
1176 struct v4l2_tuner *t)
1177 {
1178 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1179
1180 if (unlikely(t->index > 0))
1181 return -EINVAL;
1182
1183 strcpy(t->name, "Radio");
1184 t->type = V4L2_TUNER_RADIO;
1185
1186 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1187 return 0;
1188 }
1189
1190 static int radio_enum_input(struct file *file, void *priv,
1191 struct v4l2_input *i)
1192 {
1193 if (i->index != 0)
1194 return -EINVAL;
1195 strcpy(i->name, "Radio");
1196 i->type = V4L2_INPUT_TYPE_TUNER;
1197
1198 return 0;
1199 }
1200
1201 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1202 {
1203 if (unlikely(a->index))
1204 return -EINVAL;
1205
1206 strcpy(a->name, "Radio");
1207 return 0;
1208 }
1209
1210 static int radio_s_tuner(struct file *file, void *priv,
1211 struct v4l2_tuner *t)
1212 {
1213 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1214
1215 if (0 != t->index)
1216 return -EINVAL;
1217
1218 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1219
1220 return 0;
1221 }
1222
1223 static int radio_s_audio(struct file *file, void *fh,
1224 struct v4l2_audio *a)
1225 {
1226 return 0;
1227 }
1228
1229 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1230 {
1231 return 0;
1232 }
1233
1234 static int radio_queryctrl(struct file *file, void *priv,
1235 struct v4l2_queryctrl *qc)
1236 {
1237 int i;
1238
1239 if (qc->id < V4L2_CID_BASE ||
1240 qc->id >= V4L2_CID_LASTP1)
1241 return -EINVAL;
1242
1243 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1244 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1245 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1246 return 0;
1247 }
1248 }
1249
1250 return -EINVAL;
1251 }
1252
1253 /*
1254 * em28xx_v4l2_open()
1255 * inits the device and starts isoc transfer
1256 */
1257 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1258 {
1259 int minor = iminor(inode);
1260 int errCode = 0, radio = 0;
1261 struct em28xx *h,*dev = NULL;
1262 struct em28xx_fh *fh;
1263
1264 list_for_each_entry(h, &em28xx_devlist, devlist) {
1265 if (h->vdev->minor == minor) {
1266 dev = h;
1267 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1268 }
1269 if (h->vbi_dev->minor == minor) {
1270 dev = h;
1271 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1272 }
1273 if (h->radio_dev &&
1274 h->radio_dev->minor == minor) {
1275 radio = 1;
1276 dev = h;
1277 }
1278 }
1279 if (NULL == dev)
1280 return -ENODEV;
1281
1282 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1283 minor,v4l2_type_names[dev->type],dev->users);
1284
1285 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1286
1287 if (!fh) {
1288 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1289 return -ENOMEM;
1290 }
1291 mutex_lock(&dev->lock);
1292 fh->dev = dev;
1293 fh->radio = radio;
1294 filp->private_data = fh;
1295
1296 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1297 em28xx_set_alternate(dev);
1298
1299 dev->width = norm_maxw(dev);
1300 dev->height = norm_maxh(dev);
1301 dev->frame_size = dev->width * dev->height * 2;
1302 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1303 dev->bytesperline = dev->width * 2;
1304 dev->hscale = 0;
1305 dev->vscale = 0;
1306
1307 em28xx_capture_start(dev, 1);
1308 em28xx_resolution_set(dev);
1309
1310
1311 /* start the transfer */
1312 errCode = em28xx_init_isoc(dev);
1313 if (errCode)
1314 goto err;
1315
1316 em28xx_empty_framequeues(dev);
1317 }
1318 if (fh->radio) {
1319 em28xx_videodbg("video_open: setting radio device\n");
1320 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1321 }
1322
1323 dev->users++;
1324
1325 err:
1326 mutex_unlock(&dev->lock);
1327 return errCode;
1328 }
1329
1330 /*
1331 * em28xx_realease_resources()
1332 * unregisters the v4l2,i2c and usb devices
1333 * called when the device gets disconected or at module unload
1334 */
1335 static void em28xx_release_resources(struct em28xx *dev)
1336 {
1337
1338 /*FIXME: I2C IR should be disconnected */
1339
1340 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1341 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1342 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1343 list_del(&dev->devlist);
1344 if (dev->radio_dev) {
1345 if (-1 != dev->radio_dev->minor)
1346 video_unregister_device(dev->radio_dev);
1347 else
1348 video_device_release(dev->radio_dev);
1349 dev->radio_dev = NULL;
1350 }
1351 if (dev->vbi_dev) {
1352 if (-1 != dev->vbi_dev->minor)
1353 video_unregister_device(dev->vbi_dev);
1354 else
1355 video_device_release(dev->vbi_dev);
1356 dev->vbi_dev = NULL;
1357 }
1358 if (dev->vdev) {
1359 if (-1 != dev->vdev->minor)
1360 video_unregister_device(dev->vdev);
1361 else
1362 video_device_release(dev->vdev);
1363 dev->vdev = NULL;
1364 }
1365 em28xx_i2c_unregister(dev);
1366 usb_put_dev(dev->udev);
1367
1368 /* Mark device as unused */
1369 em28xx_devused&=~(1<<dev->devno);
1370 }
1371
1372 /*
1373 * em28xx_v4l2_close()
1374 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1375 */
1376 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1377 {
1378 struct em28xx_fh *fh = filp->private_data;
1379 struct em28xx *dev = fh->dev;
1380 int errCode;
1381
1382 em28xx_videodbg("users=%d\n", dev->users);
1383
1384
1385 if (res_check(fh))
1386 res_free(fh);
1387
1388 mutex_lock(&dev->lock);
1389
1390 if (dev->users == 1) {
1391 em28xx_uninit_isoc(dev);
1392 em28xx_release_buffers(dev);
1393 dev->io = IO_NONE;
1394
1395 /* the device is already disconnect,
1396 free the remaining resources */
1397 if (dev->state & DEV_DISCONNECTED) {
1398 em28xx_release_resources(dev);
1399 mutex_unlock(&dev->lock);
1400 kfree(dev);
1401 return 0;
1402 }
1403
1404 /* set alternate 0 */
1405 dev->alt = 0;
1406 em28xx_videodbg("setting alternate 0\n");
1407 errCode = usb_set_interface(dev->udev, 0, 0);
1408 if (errCode < 0) {
1409 em28xx_errdev("cannot change alternate number to "
1410 "0 (error=%i)\n", errCode);
1411 }
1412 }
1413 kfree(fh);
1414 dev->users--;
1415 wake_up_interruptible_nr(&dev->open, 1);
1416 mutex_unlock(&dev->lock);
1417 return 0;
1418 }
1419
1420 /*
1421 * em28xx_v4l2_read()
1422 * will allocate buffers when called for the first time
1423 */
1424 static ssize_t
1425 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1426 loff_t * f_pos)
1427 {
1428 struct em28xx_frame_t *f, *i;
1429 unsigned long lock_flags;
1430 int ret = 0;
1431 struct em28xx_fh *fh = filp->private_data;
1432 struct em28xx *dev = fh->dev;
1433
1434 /* FIXME: read() is not prepared to allow changing the video
1435 resolution while streaming. Seems a bug at em28xx_set_fmt
1436 */
1437
1438 if (unlikely(res_get(fh) < 0))
1439 return -EBUSY;
1440
1441 mutex_lock(&dev->lock);
1442
1443 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1444 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1445
1446 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1447 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1448 em28xx_videodbg("not supported yet! ...\n");
1449 if (copy_to_user(buf, "", 1)) {
1450 mutex_unlock(&dev->lock);
1451 return -EFAULT;
1452 }
1453 mutex_unlock(&dev->lock);
1454 return (1);
1455 }
1456 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1457 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1458 em28xx_videodbg("not supported yet! ...\n");
1459 if (copy_to_user(buf, "", 1)) {
1460 mutex_unlock(&dev->lock);
1461 return -EFAULT;
1462 }
1463 mutex_unlock(&dev->lock);
1464 return (1);
1465 }
1466
1467 if (dev->state & DEV_DISCONNECTED) {
1468 em28xx_videodbg("device not present\n");
1469 mutex_unlock(&dev->lock);
1470 return -ENODEV;
1471 }
1472
1473 if (dev->state & DEV_MISCONFIGURED) {
1474 em28xx_videodbg("device misconfigured; close and open it again\n");
1475 mutex_unlock(&dev->lock);
1476 return -EIO;
1477 }
1478
1479 if (dev->io == IO_MMAP) {
1480 em28xx_videodbg ("IO method is set to mmap; close and open"
1481 " the device again to choose the read method\n");
1482 mutex_unlock(&dev->lock);
1483 return -EINVAL;
1484 }
1485
1486 if (dev->io == IO_NONE) {
1487 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1488 em28xx_errdev("read failed, not enough memory\n");
1489 mutex_unlock(&dev->lock);
1490 return -ENOMEM;
1491 }
1492 dev->io = IO_READ;
1493 dev->stream = STREAM_ON;
1494 em28xx_queue_unusedframes(dev);
1495 }
1496
1497 if (!count) {
1498 mutex_unlock(&dev->lock);
1499 return 0;
1500 }
1501
1502 if (list_empty(&dev->outqueue)) {
1503 if (filp->f_flags & O_NONBLOCK) {
1504 mutex_unlock(&dev->lock);
1505 return -EAGAIN;
1506 }
1507 ret = wait_event_interruptible
1508 (dev->wait_frame,
1509 (!list_empty(&dev->outqueue)) ||
1510 (dev->state & DEV_DISCONNECTED));
1511 if (ret) {
1512 mutex_unlock(&dev->lock);
1513 return ret;
1514 }
1515 if (dev->state & DEV_DISCONNECTED) {
1516 mutex_unlock(&dev->lock);
1517 return -ENODEV;
1518 }
1519 dev->video_bytesread = 0;
1520 }
1521
1522 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1523
1524 em28xx_queue_unusedframes(dev);
1525
1526 if (count > f->buf.length)
1527 count = f->buf.length;
1528
1529 if ((dev->video_bytesread + count) > dev->frame_size)
1530 count = dev->frame_size - dev->video_bytesread;
1531
1532 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1533 em28xx_err("Error while copying to user\n");
1534 return -EFAULT;
1535 }
1536 dev->video_bytesread += count;
1537
1538 if (dev->video_bytesread == dev->frame_size) {
1539 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1540 list_for_each_entry(i, &dev->outqueue, frame)
1541 i->state = F_UNUSED;
1542 INIT_LIST_HEAD(&dev->outqueue);
1543 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1544
1545 em28xx_queue_unusedframes(dev);
1546 dev->video_bytesread = 0;
1547 }
1548
1549 *f_pos += count;
1550
1551 mutex_unlock(&dev->lock);
1552
1553 return count;
1554 }
1555
1556 /*
1557 * em28xx_v4l2_poll()
1558 * will allocate buffers when called for the first time
1559 */
1560 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1561 {
1562 unsigned int mask = 0;
1563 struct em28xx_fh *fh = filp->private_data;
1564 struct em28xx *dev = fh->dev;
1565
1566 if (unlikely(res_get(fh) < 0))
1567 return POLLERR;
1568
1569 mutex_lock(&dev->lock);
1570
1571 if (dev->state & DEV_DISCONNECTED) {
1572 em28xx_videodbg("device not present\n");
1573 } else if (dev->state & DEV_MISCONFIGURED) {
1574 em28xx_videodbg("device is misconfigured; close and open it again\n");
1575 } else {
1576 if (dev->io == IO_NONE) {
1577 if (!em28xx_request_buffers
1578 (dev, EM28XX_NUM_READ_FRAMES)) {
1579 em28xx_warn
1580 ("poll() failed, not enough memory\n");
1581 } else {
1582 dev->io = IO_READ;
1583 dev->stream = STREAM_ON;
1584 }
1585 }
1586
1587 if (dev->io == IO_READ) {
1588 em28xx_queue_unusedframes(dev);
1589 poll_wait(filp, &dev->wait_frame, wait);
1590
1591 if (!list_empty(&dev->outqueue))
1592 mask |= POLLIN | POLLRDNORM;
1593
1594 mutex_unlock(&dev->lock);
1595
1596 return mask;
1597 }
1598 }
1599
1600 mutex_unlock(&dev->lock);
1601 return POLLERR;
1602 }
1603
1604 /*
1605 * em28xx_v4l2_mmap()
1606 */
1607 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1608 {
1609 struct em28xx_fh *fh = filp->private_data;
1610 struct em28xx *dev = fh->dev;
1611 unsigned long size = vma->vm_end - vma->vm_start;
1612 unsigned long start = vma->vm_start;
1613 void *pos;
1614 u32 i;
1615
1616 if (unlikely(res_get(fh) < 0))
1617 return -EBUSY;
1618
1619 mutex_lock(&dev->lock);
1620
1621 if (dev->state & DEV_DISCONNECTED) {
1622 em28xx_videodbg("mmap: device not present\n");
1623 mutex_unlock(&dev->lock);
1624 return -ENODEV;
1625 }
1626
1627 if (dev->state & DEV_MISCONFIGURED) {
1628 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1629 "open it again\n");
1630 mutex_unlock(&dev->lock);
1631 return -EIO;
1632 }
1633
1634 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1635 mutex_unlock(&dev->lock);
1636 return -EINVAL;
1637 }
1638
1639 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1640 size = PAGE_ALIGN(dev->frame[0].buf.length);
1641
1642 for (i = 0; i < dev->num_frames; i++) {
1643 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1644 break;
1645 }
1646 if (i == dev->num_frames) {
1647 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1648 mutex_unlock(&dev->lock);
1649 return -EINVAL;
1650 }
1651
1652 /* VM_IO is eventually going to replace PageReserved altogether */
1653 vma->vm_flags |= VM_IO;
1654 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1655
1656 pos = dev->frame[i].bufmem;
1657 while (size > 0) { /* size is page-aligned */
1658 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1659 em28xx_videodbg("mmap: vm_insert_page failed\n");
1660 mutex_unlock(&dev->lock);
1661 return -EAGAIN;
1662 }
1663 start += PAGE_SIZE;
1664 pos += PAGE_SIZE;
1665 size -= PAGE_SIZE;
1666 }
1667
1668 vma->vm_ops = &em28xx_vm_ops;
1669 vma->vm_private_data = &dev->frame[i];
1670
1671 em28xx_vm_open(vma);
1672 mutex_unlock(&dev->lock);
1673 return 0;
1674 }
1675
1676 static const struct file_operations em28xx_v4l_fops = {
1677 .owner = THIS_MODULE,
1678 .open = em28xx_v4l2_open,
1679 .release = em28xx_v4l2_close,
1680 .read = em28xx_v4l2_read,
1681 .poll = em28xx_v4l2_poll,
1682 .mmap = em28xx_v4l2_mmap,
1683 .ioctl = video_ioctl2,
1684 .llseek = no_llseek,
1685 .compat_ioctl = v4l_compat_ioctl32,
1686 };
1687
1688 static const struct file_operations radio_fops = {
1689 .owner = THIS_MODULE,
1690 .open = em28xx_v4l2_open,
1691 .release = em28xx_v4l2_close,
1692 .ioctl = video_ioctl2,
1693 .compat_ioctl = v4l_compat_ioctl32,
1694 .llseek = no_llseek,
1695 };
1696
1697 static const struct video_device em28xx_video_template = {
1698 .fops = &em28xx_v4l_fops,
1699 .release = video_device_release,
1700
1701 .minor = -1,
1702 .vidioc_querycap = vidioc_querycap,
1703 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1704 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1705 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1706 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1707 .vidioc_g_audio = vidioc_g_audio,
1708 .vidioc_s_audio = vidioc_s_audio,
1709 .vidioc_cropcap = vidioc_cropcap,
1710
1711 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1712 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1713 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1714
1715 .vidioc_reqbufs = vidioc_reqbufs,
1716 .vidioc_querybuf = vidioc_querybuf,
1717 .vidioc_qbuf = vidioc_qbuf,
1718 .vidioc_dqbuf = vidioc_dqbuf,
1719 .vidioc_s_std = vidioc_s_std,
1720 .vidioc_enum_input = vidioc_enum_input,
1721 .vidioc_g_input = vidioc_g_input,
1722 .vidioc_s_input = vidioc_s_input,
1723 .vidioc_queryctrl = vidioc_queryctrl,
1724 .vidioc_g_ctrl = vidioc_g_ctrl,
1725 .vidioc_s_ctrl = vidioc_s_ctrl,
1726 .vidioc_streamon = vidioc_streamon,
1727 .vidioc_streamoff = vidioc_streamoff,
1728 .vidioc_g_tuner = vidioc_g_tuner,
1729 .vidioc_s_tuner = vidioc_s_tuner,
1730 .vidioc_g_frequency = vidioc_g_frequency,
1731 .vidioc_s_frequency = vidioc_s_frequency,
1732
1733 .tvnorms = V4L2_STD_ALL,
1734 .current_norm = V4L2_STD_PAL,
1735 };
1736
1737 static struct video_device em28xx_radio_template = {
1738 .name = "em28xx-radio",
1739 .type = VID_TYPE_TUNER,
1740 .fops = &radio_fops,
1741 .minor = -1,
1742 .vidioc_querycap = radio_querycap,
1743 .vidioc_g_tuner = radio_g_tuner,
1744 .vidioc_enum_input = radio_enum_input,
1745 .vidioc_g_audio = radio_g_audio,
1746 .vidioc_s_tuner = radio_s_tuner,
1747 .vidioc_s_audio = radio_s_audio,
1748 .vidioc_s_input = radio_s_input,
1749 .vidioc_queryctrl = radio_queryctrl,
1750 .vidioc_g_ctrl = vidioc_g_ctrl,
1751 .vidioc_s_ctrl = vidioc_s_ctrl,
1752 .vidioc_g_frequency = vidioc_g_frequency,
1753 .vidioc_s_frequency = vidioc_s_frequency,
1754 };
1755
1756 /******************************** usb interface *****************************************/
1757
1758
1759 static LIST_HEAD(em28xx_extension_devlist);
1760 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1761
1762 int em28xx_register_extension(struct em28xx_ops *ops)
1763 {
1764 struct em28xx *h, *dev = NULL;
1765
1766 list_for_each_entry(h, &em28xx_devlist, devlist)
1767 dev = h;
1768
1769 mutex_lock(&em28xx_extension_devlist_lock);
1770 list_add_tail(&ops->next, &em28xx_extension_devlist);
1771 if (dev)
1772 ops->init(dev);
1773
1774 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1775 mutex_unlock(&em28xx_extension_devlist_lock);
1776
1777 return 0;
1778 }
1779 EXPORT_SYMBOL(em28xx_register_extension);
1780
1781 void em28xx_unregister_extension(struct em28xx_ops *ops)
1782 {
1783 struct em28xx *h, *dev = NULL;
1784
1785 list_for_each_entry(h, &em28xx_devlist, devlist)
1786 dev = h;
1787
1788 if (dev)
1789 ops->fini(dev);
1790
1791 mutex_lock(&em28xx_extension_devlist_lock);
1792 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1793 list_del(&ops->next);
1794 mutex_unlock(&em28xx_extension_devlist_lock);
1795 }
1796 EXPORT_SYMBOL(em28xx_unregister_extension);
1797
1798 struct video_device *em28xx_vdev_init(struct em28xx *dev,
1799 const struct video_device *template,
1800 const int type,
1801 const char *type_name)
1802 {
1803 struct video_device *vfd;
1804
1805 vfd = video_device_alloc();
1806 if (NULL == vfd)
1807 return NULL;
1808 *vfd = *template;
1809 vfd->minor = -1;
1810 vfd->dev = &dev->udev->dev;
1811 vfd->release = video_device_release;
1812 vfd->type = type;
1813
1814 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1815 dev->name, type_name);
1816
1817 return vfd;
1818 }
1819
1820
1821 /*
1822 * em28xx_init_dev()
1823 * allocates and inits the device structs, registers i2c bus and v4l device
1824 */
1825 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1826 int minor)
1827 {
1828 struct em28xx_ops *ops = NULL;
1829 struct em28xx *dev = *devhandle;
1830 int retval = -ENOMEM;
1831 int errCode;
1832 unsigned int maxh, maxw;
1833
1834 dev->udev = udev;
1835 mutex_init(&dev->lock);
1836 spin_lock_init(&dev->queue_lock);
1837 init_waitqueue_head(&dev->open);
1838 init_waitqueue_head(&dev->wait_frame);
1839 init_waitqueue_head(&dev->wait_stream);
1840
1841 dev->em28xx_write_regs = em28xx_write_regs;
1842 dev->em28xx_read_reg = em28xx_read_reg;
1843 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1844 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1845 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1846 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1847
1848 errCode = em28xx_read_reg(dev, CHIPID_REG);
1849 if (errCode >= 0)
1850 em28xx_info("em28xx chip ID = %d\n", errCode);
1851
1852 em28xx_pre_card_setup(dev);
1853
1854 errCode = em28xx_config(dev);
1855 if (errCode) {
1856 em28xx_errdev("error configuring device\n");
1857 em28xx_devused &= ~(1<<dev->devno);
1858 kfree(dev);
1859 return -ENOMEM;
1860 }
1861
1862 /* register i2c bus */
1863 em28xx_i2c_register(dev);
1864
1865 /* Do board specific init and eeprom reading */
1866 em28xx_card_setup(dev);
1867
1868 /* Configure audio */
1869 em28xx_audio_analog_set(dev);
1870
1871 /* configure the device */
1872 em28xx_config_i2c(dev);
1873
1874 /* set default norm */
1875 dev->norm = em28xx_video_template.current_norm;
1876
1877 maxw = norm_maxw(dev);
1878 maxh = norm_maxh(dev);
1879
1880 /* set default image size */
1881 dev->width = maxw;
1882 dev->height = maxh;
1883 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1884 dev->field_size = dev->width * dev->height;
1885 dev->frame_size =
1886 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1887 dev->bytesperline = dev->width * 2;
1888 dev->hscale = 0;
1889 dev->vscale = 0;
1890 dev->ctl_input = 2;
1891
1892 errCode = em28xx_config(dev);
1893
1894 list_add_tail(&dev->devlist, &em28xx_devlist);
1895
1896 /* allocate and fill video video_device struct */
1897 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1898 VID_TYPE_CAPTURE, "video");
1899 if (NULL == dev->vdev) {
1900 em28xx_errdev("cannot allocate video_device.\n");
1901 goto fail_unreg;
1902 }
1903 if (dev->has_tuner)
1904 dev->vdev->type |= VID_TYPE_TUNER;
1905
1906 /* register v4l2 video video_device */
1907 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1908 video_nr[dev->devno]);
1909 if (retval) {
1910 em28xx_errdev("unable to register video device (error=%i).\n",
1911 retval);
1912 goto fail_unreg;
1913 }
1914
1915 /* Allocate and fill vbi video_device struct */
1916 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1917 VFL_TYPE_VBI, "vbi");
1918 /* register v4l2 vbi video_device */
1919 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1920 vbi_nr[dev->devno]) < 0) {
1921 em28xx_errdev("unable to register vbi device\n");
1922 retval = -ENODEV;
1923 goto fail_unreg;
1924 }
1925
1926 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1927 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1928 VFL_TYPE_RADIO, "radio");
1929 if (NULL == dev->radio_dev) {
1930 em28xx_errdev("cannot allocate video_device.\n");
1931 goto fail_unreg;
1932 }
1933 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1934 radio_nr[dev->devno]);
1935 if (retval < 0) {
1936 em28xx_errdev("can't register radio device\n");
1937 goto fail_unreg;
1938 }
1939 em28xx_info("Registered radio device as /dev/radio%d\n",
1940 dev->radio_dev->minor & 0x1f);
1941 }
1942
1943
1944 if (dev->has_msp34xx) {
1945 /* Send a reset to other chips via gpio */
1946 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1947 msleep(3);
1948 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1949 msleep(3);
1950 }
1951
1952 video_mux(dev, 0);
1953
1954 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1955 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1956 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1957
1958 mutex_lock(&em28xx_extension_devlist_lock);
1959 if (!list_empty(&em28xx_extension_devlist)) {
1960 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1961 if (ops->id)
1962 ops->init(dev);
1963 }
1964 }
1965 mutex_unlock(&em28xx_extension_devlist_lock);
1966
1967 return 0;
1968
1969 fail_unreg:
1970 em28xx_release_resources(dev);
1971 mutex_unlock(&dev->lock);
1972 kfree(dev);
1973 return retval;
1974 }
1975
1976 #if defined(CONFIG_MODULES) && defined(MODULE)
1977 static void request_module_async(struct work_struct *work)
1978 {
1979 struct em28xx *dev = container_of(work,
1980 struct em28xx, request_module_wk);
1981
1982 if (!dev->has_audio_class)
1983 request_module("em28xx-alsa");
1984 }
1985
1986 static void request_modules(struct em28xx *dev)
1987 {
1988 INIT_WORK(&dev->request_module_wk, request_module_async);
1989 schedule_work(&dev->request_module_wk);
1990 }
1991 #else
1992 #define request_modules(dev)
1993 #endif /* CONFIG_MODULES */
1994
1995 /*
1996 * em28xx_usb_probe()
1997 * checks for supported devices
1998 */
1999 static int em28xx_usb_probe(struct usb_interface *interface,
2000 const struct usb_device_id *id)
2001 {
2002 const struct usb_endpoint_descriptor *endpoint;
2003 struct usb_device *udev;
2004 struct usb_interface *uif;
2005 struct em28xx *dev = NULL;
2006 int retval = -ENODEV;
2007 int i, nr, ifnum;
2008
2009 udev = usb_get_dev(interface_to_usbdev(interface));
2010 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2011
2012 /* Check to see next free device and mark as used */
2013 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2014 em28xx_devused|=1<<nr;
2015
2016 /* Don't register audio interfaces */
2017 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2018 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2019 udev->descriptor.idVendor,udev->descriptor.idProduct,
2020 ifnum,
2021 interface->altsetting[0].desc.bInterfaceClass);
2022
2023 em28xx_devused&=~(1<<nr);
2024 return -ENODEV;
2025 }
2026
2027 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2028 udev->descriptor.idVendor,udev->descriptor.idProduct,
2029 ifnum,
2030 interface->altsetting[0].desc.bInterfaceClass);
2031
2032 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2033
2034 /* check if the device has the iso in endpoint at the correct place */
2035 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2036 USB_ENDPOINT_XFER_ISOC) {
2037 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2038 em28xx_devused&=~(1<<nr);
2039 return -ENODEV;
2040 }
2041 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2042 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2043 em28xx_devused&=~(1<<nr);
2044 return -ENODEV;
2045 }
2046
2047 if (nr >= EM28XX_MAXBOARDS) {
2048 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2049 em28xx_devused&=~(1<<nr);
2050 return -ENOMEM;
2051 }
2052
2053 /* allocate memory for our device state and initialize it */
2054 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2055 if (dev == NULL) {
2056 em28xx_err(DRIVER_NAME ": out of memory!\n");
2057 em28xx_devused&=~(1<<nr);
2058 return -ENOMEM;
2059 }
2060
2061 snprintf(dev->name, 29, "em28xx #%d", nr);
2062 dev->devno = nr;
2063 dev->model = id->driver_info;
2064
2065 /* Checks if audio is provided by some interface */
2066 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2067 uif = udev->config->interface[i];
2068 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2069 dev->has_audio_class = 1;
2070 break;
2071 }
2072 }
2073
2074 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2075 dev->has_audio_class ? "Has" : "Doesn't have");
2076
2077 /* compute alternate max packet sizes */
2078 uif = udev->actconfig->interface[0];
2079
2080 dev->num_alt=uif->num_altsetting;
2081 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2082 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2083 dev->alt_max_pkt_size = kmalloc(32*
2084 dev->num_alt,GFP_KERNEL);
2085 if (dev->alt_max_pkt_size == NULL) {
2086 em28xx_errdev("out of memory!\n");
2087 em28xx_devused&=~(1<<nr);
2088 kfree(dev);
2089 return -ENOMEM;
2090 }
2091
2092 for (i = 0; i < dev->num_alt ; i++) {
2093 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2094 wMaxPacketSize);
2095 dev->alt_max_pkt_size[i] =
2096 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2097 em28xx_info("Alternate setting %i, max size= %i\n",i,
2098 dev->alt_max_pkt_size[i]);
2099 }
2100
2101 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2102 dev->model = card[nr];
2103
2104 /* allocate device struct */
2105 retval = em28xx_init_dev(&dev, udev, nr);
2106 if (retval)
2107 return retval;
2108
2109 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2110
2111 /* save our data pointer in this interface device */
2112 usb_set_intfdata(interface, dev);
2113
2114 request_modules(dev);
2115
2116 return 0;
2117 }
2118
2119 /*
2120 * em28xx_usb_disconnect()
2121 * called when the device gets diconencted
2122 * video device will be unregistered on v4l2_close in case it is still open
2123 */
2124 static void em28xx_usb_disconnect(struct usb_interface *interface)
2125 {
2126 struct em28xx *dev;
2127 struct em28xx_ops *ops = NULL;
2128
2129 dev = usb_get_intfdata(interface);
2130 usb_set_intfdata(interface, NULL);
2131
2132 if (!dev)
2133 return;
2134
2135 em28xx_info("disconnecting %s\n", dev->vdev->name);
2136
2137 /* wait until all current v4l2 io is finished then deallocate resources */
2138 mutex_lock(&dev->lock);
2139
2140 wake_up_interruptible_all(&dev->open);
2141
2142 if (dev->users) {
2143 em28xx_warn
2144 ("device /dev/video%d is open! Deregistration and memory "
2145 "deallocation are deferred on close.\n",
2146 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2147
2148 dev->state |= DEV_MISCONFIGURED;
2149 em28xx_uninit_isoc(dev);
2150 dev->state |= DEV_DISCONNECTED;
2151 wake_up_interruptible(&dev->wait_frame);
2152 wake_up_interruptible(&dev->wait_stream);
2153 } else {
2154 dev->state |= DEV_DISCONNECTED;
2155 em28xx_release_resources(dev);
2156 }
2157 mutex_unlock(&dev->lock);
2158
2159 mutex_lock(&em28xx_extension_devlist_lock);
2160 if (!list_empty(&em28xx_extension_devlist)) {
2161 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2162 ops->fini(dev);
2163 }
2164 }
2165 mutex_unlock(&em28xx_extension_devlist_lock);
2166
2167 if (!dev->users) {
2168 kfree(dev->alt_max_pkt_size);
2169 kfree(dev);
2170 }
2171 }
2172
2173 static struct usb_driver em28xx_usb_driver = {
2174 .name = "em28xx",
2175 .probe = em28xx_usb_probe,
2176 .disconnect = em28xx_usb_disconnect,
2177 .id_table = em28xx_id_table,
2178 };
2179
2180 static int __init em28xx_module_init(void)
2181 {
2182 int result;
2183
2184 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2185 (EM28XX_VERSION_CODE >> 16) & 0xff,
2186 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2187 #ifdef SNAPSHOT
2188 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2189 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2190 #endif
2191
2192 /* register this driver with the USB subsystem */
2193 result = usb_register(&em28xx_usb_driver);
2194 if (result)
2195 em28xx_err(DRIVER_NAME
2196 " usb_register failed. Error number %d.\n", result);
2197
2198 return result;
2199 }
2200
2201 static void __exit em28xx_module_exit(void)
2202 {
2203 /* deregister this driver with the USB subsystem */
2204 usb_deregister(&em28xx_usb_driver);
2205 }
2206
2207 module_init(em28xx_module_init);
2208 module_exit(em28xx_module_exit);
kernel source for telekom puls (alcatel/mediatek)