f69f591eeaf6fc768245d6b5854638f3f1407796
[linux-2.6.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 #ifdef CONFIG_VIDEO_ADV_DEBUG
834 static int em28xx_reg_len(int reg)
835 {
836         switch (reg) {
837         case AC97LSB_REG:
838         case HSCALELOW_REG:
839         case VSCALELOW_REG:
840
841                 return 2;
842         default:
843                 return 1;
844         }
845 }
846
847 static int vidioc_g_register(struct file *file, void *priv,
848                              struct v4l2_register *reg)
849 {
850         struct em28xx_fh      *fh  = priv;
851         struct em28xx         *dev = fh->dev;
852         int ret;
853
854         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
855                 return -EINVAL;
856
857         if (em28xx_reg_len(reg->reg) == 1) {
858                 ret = em28xx_read_reg(dev, reg->reg);
859                 if (ret < 0)
860                         return ret;
861
862                 reg->val = ret;
863         } else {
864                 u64 val = 0;
865                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
866                                                    reg->reg, (char *)&val, 2);
867                 if (ret < 0)
868                         return ret;
869
870                 reg->val = cpu_to_le64((__u64)val);
871         }
872
873         return 0;
874 }
875
876 static int vidioc_s_register(struct file *file, void *priv,
877                              struct v4l2_register *reg)
878 {
879         struct em28xx_fh      *fh  = priv;
880         struct em28xx         *dev = fh->dev;
881         u64 buf;
882
883         buf = le64_to_cpu((__u64)reg->val);
884
885         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
886                                  em28xx_reg_len(reg->reg));
887 }
888 #endif
889
890
891 static int vidioc_cropcap(struct file *file, void *priv,
892                                         struct v4l2_cropcap *cc)
893 {
894         struct em28xx_fh      *fh  = priv;
895         struct em28xx         *dev = fh->dev;
896
897         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
898                 return -EINVAL;
899
900         cc->bounds.left = 0;
901         cc->bounds.top = 0;
902         cc->bounds.width = dev->width;
903         cc->bounds.height = dev->height;
904         cc->defrect = cc->bounds;
905         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
906         cc->pixelaspect.denominator = 59;
907
908         return 0;
909 }
910
911 static int vidioc_streamon(struct file *file, void *priv,
912                                         enum v4l2_buf_type type)
913 {
914         struct em28xx_fh      *fh  = priv;
915         struct em28xx         *dev = fh->dev;
916         int                   rc;
917
918         rc = check_dev(dev);
919         if (rc < 0)
920                 return rc;
921
922         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
923                 return -EINVAL;
924
925         if (list_empty(&dev->inqueue))
926                 return -EINVAL;
927
928         mutex_lock(&dev->lock);
929
930         if (unlikely(res_get(fh) < 0)) {
931                 mutex_unlock(&dev->lock);
932                 return -EBUSY;
933         }
934
935         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
936
937         mutex_unlock(&dev->lock);
938         return 0;
939 }
940
941 static int vidioc_streamoff(struct file *file, void *priv,
942                                         enum v4l2_buf_type type)
943 {
944         struct em28xx_fh      *fh  = priv;
945         struct em28xx         *dev = fh->dev;
946         int                   rc;
947
948         rc = check_dev(dev);
949         if (rc < 0)
950                 return rc;
951
952         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
953                 return -EINVAL;
954
955         mutex_lock(&dev->lock);
956
957         if (dev->stream == STREAM_ON) {
958                 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
959                 rc = em28xx_stream_interrupt(dev);
960                 if (rc < 0) {
961                         mutex_unlock(&dev->lock);
962                         return rc;
963                 }
964         }
965
966         em28xx_empty_framequeues(dev);
967
968         mutex_unlock(&dev->lock);
969         return 0;
970 }
971
972 static int vidioc_querycap(struct file *file, void  *priv,
973                                         struct v4l2_capability *cap)
974 {
975         struct em28xx_fh      *fh  = priv;
976         struct em28xx         *dev = fh->dev;
977
978         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
979         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
980         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
981
982         cap->version = EM28XX_VERSION_CODE;
983
984         cap->capabilities =
985                         V4L2_CAP_SLICED_VBI_CAPTURE |
986                         V4L2_CAP_VIDEO_CAPTURE |
987                         V4L2_CAP_AUDIO |
988                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
989
990         if (dev->tuner_type != TUNER_ABSENT)
991                 cap->capabilities |= V4L2_CAP_TUNER;
992
993         return 0;
994 }
995
996 static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
997                                         struct v4l2_fmtdesc *fmtd)
998 {
999         if (fmtd->index != 0)
1000                 return -EINVAL;
1001
1002         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1003         strcpy(fmtd->description, "Packed YUY2");
1004         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1005         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1006
1007         return 0;
1008 }
1009
1010 /* Sliced VBI ioctls */
1011 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1012                                         struct v4l2_format *f)
1013 {
1014         struct em28xx_fh      *fh  = priv;
1015         struct em28xx         *dev = fh->dev;
1016         int                   rc;
1017
1018         rc = check_dev(dev);
1019         if (rc < 0)
1020                 return rc;
1021
1022         mutex_lock(&dev->lock);
1023
1024         f->fmt.sliced.service_set = 0;
1025
1026         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1027
1028         if (f->fmt.sliced.service_set == 0)
1029                 rc = -EINVAL;
1030
1031         mutex_unlock(&dev->lock);
1032         return rc;
1033 }
1034
1035 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1036                         struct v4l2_format *f)
1037 {
1038         struct em28xx_fh      *fh  = priv;
1039         struct em28xx         *dev = fh->dev;
1040         int                   rc;
1041
1042         rc = check_dev(dev);
1043         if (rc < 0)
1044                 return rc;
1045
1046         mutex_lock(&dev->lock);
1047         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1048         mutex_unlock(&dev->lock);
1049
1050         if (f->fmt.sliced.service_set == 0)
1051                 return -EINVAL;
1052
1053         return 0;
1054 }
1055
1056
1057 static int vidioc_reqbufs(struct file *file, void *priv,
1058                           struct v4l2_requestbuffers *rb)
1059 {
1060         struct em28xx_fh      *fh  = priv;
1061         struct em28xx         *dev = fh->dev;
1062         u32                   i;
1063         int                   rc;
1064
1065         rc = check_dev(dev);
1066         if (rc < 0)
1067                 return rc;
1068
1069         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1070                 rb->memory != V4L2_MEMORY_MMAP)
1071                 return -EINVAL;
1072
1073         if (dev->io == IO_READ) {
1074                 em28xx_videodbg("method is set to read;"
1075                                 " close and open the device again to"
1076                                 " choose the mmap I/O method\n");
1077                 return -EINVAL;
1078         }
1079
1080         for (i = 0; i < dev->num_frames; i++)
1081                 if (dev->frame[i].vma_use_count) {
1082                         em28xx_videodbg("VIDIOC_REQBUFS failed; "
1083                                         "previous buffers are still mapped\n");
1084                         return -EINVAL;
1085                 }
1086
1087         mutex_lock(&dev->lock);
1088
1089         if (dev->stream == STREAM_ON) {
1090                 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1091                 rc = em28xx_stream_interrupt(dev);
1092                 if (rc < 0) {
1093                         mutex_unlock(&dev->lock);
1094                         return rc;
1095                 }
1096         }
1097
1098         em28xx_empty_framequeues(dev);
1099
1100         em28xx_release_buffers(dev);
1101         if (rb->count)
1102                 rb->count = em28xx_request_buffers(dev, rb->count);
1103
1104         dev->frame_current = NULL;
1105         dev->io = rb->count ? IO_MMAP : IO_NONE;
1106
1107         mutex_unlock(&dev->lock);
1108         return 0;
1109 }
1110
1111 static int vidioc_querybuf(struct file *file, void *priv,
1112                            struct v4l2_buffer *b)
1113 {
1114         struct em28xx_fh      *fh  = priv;
1115         struct em28xx         *dev = fh->dev;
1116         int                   rc;
1117
1118         rc = check_dev(dev);
1119         if (rc < 0)
1120                 return rc;
1121
1122         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1123                 b->index >= dev->num_frames || dev->io != IO_MMAP)
1124                 return -EINVAL;
1125
1126         mutex_lock(&dev->lock);
1127
1128         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1129
1130         if (dev->frame[b->index].vma_use_count)
1131                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1132
1133         if (dev->frame[b->index].state == F_DONE)
1134                 b->flags |= V4L2_BUF_FLAG_DONE;
1135         else if (dev->frame[b->index].state != F_UNUSED)
1136                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1137
1138         mutex_unlock(&dev->lock);
1139         return 0;
1140 }
1141
1142 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1143 {
1144         struct em28xx_fh      *fh  = priv;
1145         struct em28xx         *dev = fh->dev;
1146         unsigned long         lock_flags;
1147         int                   rc;
1148
1149         rc = check_dev(dev);
1150         if (rc < 0)
1151                 return rc;
1152
1153         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE  || dev->io != IO_MMAP ||
1154                                                 b->index >= dev->num_frames)
1155                 return -EINVAL;
1156
1157         if (dev->frame[b->index].state != F_UNUSED)
1158                 return -EAGAIN;
1159
1160         dev->frame[b->index].state = F_QUEUED;
1161
1162         /* add frame to fifo */
1163         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1164         list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1165         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1166
1167         return 0;
1168 }
1169
1170 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1171 {
1172         struct em28xx_fh      *fh  = priv;
1173         struct em28xx         *dev = fh->dev;
1174         int                   rc;
1175         struct em28xx_frame_t *f;
1176         unsigned long         lock_flags;
1177
1178         rc = check_dev(dev);
1179         if (rc < 0)
1180                 return rc;
1181
1182         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1183                 return -EINVAL;
1184
1185         if (list_empty(&dev->outqueue)) {
1186                 if (dev->stream == STREAM_OFF)
1187                         return -EINVAL;
1188
1189                 if (file->f_flags & O_NONBLOCK)
1190                         return -EAGAIN;
1191
1192                 rc = wait_event_interruptible(dev->wait_frame,
1193                                         (!list_empty(&dev->outqueue)) ||
1194                                         (dev->state & DEV_DISCONNECTED));
1195                 if (rc)
1196                         return rc;
1197
1198                 if (dev->state & DEV_DISCONNECTED)
1199                         return -ENODEV;
1200         }
1201
1202         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1203         f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1204         list_del(dev->outqueue.next);
1205         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1206
1207         f->state = F_UNUSED;
1208         memcpy(b, &f->buf, sizeof(*b));
1209
1210         if (f->vma_use_count)
1211                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1212
1213         return 0;
1214 }
1215
1216 /* ----------------------------------------------------------- */
1217 /* RADIO ESPECIFIC IOCTLS                                      */
1218 /* ----------------------------------------------------------- */
1219
1220 static int radio_querycap(struct file *file, void  *priv,
1221                           struct v4l2_capability *cap)
1222 {
1223         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1224
1225         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1226         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1227         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1228
1229         cap->version = EM28XX_VERSION_CODE;
1230         cap->capabilities = V4L2_CAP_TUNER;
1231         return 0;
1232 }
1233
1234 static int radio_g_tuner(struct file *file, void *priv,
1235                          struct v4l2_tuner *t)
1236 {
1237         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1238
1239         if (unlikely(t->index > 0))
1240                 return -EINVAL;
1241
1242         strcpy(t->name, "Radio");
1243         t->type = V4L2_TUNER_RADIO;
1244
1245         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1246         return 0;
1247 }
1248
1249 static int radio_enum_input(struct file *file, void *priv,
1250                             struct v4l2_input *i)
1251 {
1252         if (i->index != 0)
1253                 return -EINVAL;
1254         strcpy(i->name, "Radio");
1255         i->type = V4L2_INPUT_TYPE_TUNER;
1256
1257         return 0;
1258 }
1259
1260 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1261 {
1262         if (unlikely(a->index))
1263                 return -EINVAL;
1264
1265         strcpy(a->name, "Radio");
1266         return 0;
1267 }
1268
1269 static int radio_s_tuner(struct file *file, void *priv,
1270                          struct v4l2_tuner *t)
1271 {
1272         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1273
1274         if (0 != t->index)
1275                 return -EINVAL;
1276
1277         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1278
1279         return 0;
1280 }
1281
1282 static int radio_s_audio(struct file *file, void *fh,
1283                          struct v4l2_audio *a)
1284 {
1285         return 0;
1286 }
1287
1288 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1289 {
1290         return 0;
1291 }
1292
1293 static int radio_queryctrl(struct file *file, void *priv,
1294                            struct v4l2_queryctrl *qc)
1295 {
1296         int i;
1297
1298         if (qc->id <  V4L2_CID_BASE ||
1299                 qc->id >= V4L2_CID_LASTP1)
1300                 return -EINVAL;
1301
1302         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1303                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1304                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1305                         return 0;
1306                 }
1307         }
1308
1309         return -EINVAL;
1310 }
1311
1312 /*
1313  * em28xx_v4l2_open()
1314  * inits the device and starts isoc transfer
1315  */
1316 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1317 {
1318         int minor = iminor(inode);
1319         int errCode = 0, radio = 0;
1320         struct em28xx *h,*dev = NULL;
1321         struct em28xx_fh *fh;
1322
1323         list_for_each_entry(h, &em28xx_devlist, devlist) {
1324                 if (h->vdev->minor == minor) {
1325                         dev  = h;
1326                         dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1327                 }
1328                 if (h->vbi_dev->minor == minor) {
1329                         dev  = h;
1330                         dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1331                 }
1332                 if (h->radio_dev &&
1333                     h->radio_dev->minor == minor) {
1334                         radio = 1;
1335                         dev   = h;
1336                 }
1337         }
1338         if (NULL == dev)
1339                 return -ENODEV;
1340
1341         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1342                                 minor,v4l2_type_names[dev->type],dev->users);
1343
1344         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1345
1346         if (!fh) {
1347                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1348                 return -ENOMEM;
1349         }
1350         mutex_lock(&dev->lock);
1351         fh->dev = dev;
1352         fh->radio = radio;
1353         filp->private_data = fh;
1354
1355         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1356                 em28xx_set_alternate(dev);
1357
1358                 dev->width = norm_maxw(dev);
1359                 dev->height = norm_maxh(dev);
1360                 dev->frame_size = dev->width * dev->height * 2;
1361                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1362                 dev->bytesperline = dev->width * 2;
1363                 dev->hscale = 0;
1364                 dev->vscale = 0;
1365
1366                 em28xx_capture_start(dev, 1);
1367                 em28xx_resolution_set(dev);
1368
1369
1370                 /* start the transfer */
1371                 errCode = em28xx_init_isoc(dev);
1372                 if (errCode)
1373                         goto err;
1374
1375                 em28xx_empty_framequeues(dev);
1376         }
1377         if (fh->radio) {
1378                 em28xx_videodbg("video_open: setting radio device\n");
1379                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1380         }
1381
1382         dev->users++;
1383
1384 err:
1385         mutex_unlock(&dev->lock);
1386         return errCode;
1387 }
1388
1389 /*
1390  * em28xx_realease_resources()
1391  * unregisters the v4l2,i2c and usb devices
1392  * called when the device gets disconected or at module unload
1393 */
1394 static void em28xx_release_resources(struct em28xx *dev)
1395 {
1396
1397         /*FIXME: I2C IR should be disconnected */
1398
1399         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1400                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1401                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1402         list_del(&dev->devlist);
1403         if (dev->radio_dev) {
1404                 if (-1 != dev->radio_dev->minor)
1405                         video_unregister_device(dev->radio_dev);
1406                 else
1407                         video_device_release(dev->radio_dev);
1408                 dev->radio_dev = NULL;
1409         }
1410         if (dev->vbi_dev) {
1411                 if (-1 != dev->vbi_dev->minor)
1412                         video_unregister_device(dev->vbi_dev);
1413                 else
1414                         video_device_release(dev->vbi_dev);
1415                 dev->vbi_dev = NULL;
1416         }
1417         if (dev->vdev) {
1418                 if (-1 != dev->vdev->minor)
1419                         video_unregister_device(dev->vdev);
1420                 else
1421                         video_device_release(dev->vdev);
1422                 dev->vdev = NULL;
1423         }
1424         em28xx_i2c_unregister(dev);
1425         usb_put_dev(dev->udev);
1426
1427         /* Mark device as unused */
1428         em28xx_devused&=~(1<<dev->devno);
1429 }
1430
1431 /*
1432  * em28xx_v4l2_close()
1433  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1434  */
1435 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1436 {
1437         struct em28xx_fh *fh  = filp->private_data;
1438         struct em28xx    *dev = fh->dev;
1439         int              errCode;
1440
1441         em28xx_videodbg("users=%d\n", dev->users);
1442
1443
1444         if (res_check(fh))
1445                 res_free(fh);
1446
1447         mutex_lock(&dev->lock);
1448
1449         if (dev->users == 1) {
1450                 em28xx_uninit_isoc(dev);
1451                 em28xx_release_buffers(dev);
1452                 dev->io = IO_NONE;
1453
1454                 /* the device is already disconnect,
1455                    free the remaining resources */
1456                 if (dev->state & DEV_DISCONNECTED) {
1457                         em28xx_release_resources(dev);
1458                         mutex_unlock(&dev->lock);
1459                         kfree(dev);
1460                         return 0;
1461                 }
1462
1463                 /* set alternate 0 */
1464                 dev->alt = 0;
1465                 em28xx_videodbg("setting alternate 0\n");
1466                 errCode = usb_set_interface(dev->udev, 0, 0);
1467                 if (errCode < 0) {
1468                         em28xx_errdev("cannot change alternate number to "
1469                                         "0 (error=%i)\n", errCode);
1470                 }
1471         }
1472         kfree(fh);
1473         dev->users--;
1474         wake_up_interruptible_nr(&dev->open, 1);
1475         mutex_unlock(&dev->lock);
1476         return 0;
1477 }
1478
1479 /*
1480  * em28xx_v4l2_read()
1481  * will allocate buffers when called for the first time
1482  */
1483 static ssize_t
1484 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1485                  loff_t * f_pos)
1486 {
1487         struct em28xx_frame_t *f, *i;
1488         unsigned long lock_flags;
1489         int ret = 0;
1490         struct em28xx_fh *fh = filp->private_data;
1491         struct em28xx *dev = fh->dev;
1492
1493         /* FIXME: read() is not prepared to allow changing the video
1494            resolution while streaming. Seems a bug at em28xx_set_fmt
1495          */
1496
1497         if (unlikely(res_get(fh) < 0))
1498                 return -EBUSY;
1499
1500         mutex_lock(&dev->lock);
1501
1502         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1503                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1504
1505         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1506                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1507                 em28xx_videodbg("not supported yet! ...\n");
1508                 if (copy_to_user(buf, "", 1)) {
1509                         mutex_unlock(&dev->lock);
1510                         return -EFAULT;
1511                 }
1512                 mutex_unlock(&dev->lock);
1513                 return (1);
1514         }
1515         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1516                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1517                 em28xx_videodbg("not supported yet! ...\n");
1518                 if (copy_to_user(buf, "", 1)) {
1519                         mutex_unlock(&dev->lock);
1520                         return -EFAULT;
1521                 }
1522                 mutex_unlock(&dev->lock);
1523                 return (1);
1524         }
1525
1526         if (dev->state & DEV_DISCONNECTED) {
1527                 em28xx_videodbg("device not present\n");
1528                 mutex_unlock(&dev->lock);
1529                 return -ENODEV;
1530         }
1531
1532         if (dev->state & DEV_MISCONFIGURED) {
1533                 em28xx_videodbg("device misconfigured; close and open it again\n");
1534                 mutex_unlock(&dev->lock);
1535                 return -EIO;
1536         }
1537
1538         if (dev->io == IO_MMAP) {
1539                 em28xx_videodbg ("IO method is set to mmap; close and open"
1540                                 " the device again to choose the read method\n");
1541                 mutex_unlock(&dev->lock);
1542                 return -EINVAL;
1543         }
1544
1545         if (dev->io == IO_NONE) {
1546                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1547                         em28xx_errdev("read failed, not enough memory\n");
1548                         mutex_unlock(&dev->lock);
1549                         return -ENOMEM;
1550                 }
1551                 dev->io = IO_READ;
1552                 dev->stream = STREAM_ON;
1553                 em28xx_queue_unusedframes(dev);
1554         }
1555
1556         if (!count) {
1557                 mutex_unlock(&dev->lock);
1558                 return 0;
1559         }
1560
1561         if (list_empty(&dev->outqueue)) {
1562                 if (filp->f_flags & O_NONBLOCK) {
1563                         mutex_unlock(&dev->lock);
1564                         return -EAGAIN;
1565                 }
1566                 ret = wait_event_interruptible
1567                     (dev->wait_frame,
1568                      (!list_empty(&dev->outqueue)) ||
1569                      (dev->state & DEV_DISCONNECTED));
1570                 if (ret) {
1571                         mutex_unlock(&dev->lock);
1572                         return ret;
1573                 }
1574                 if (dev->state & DEV_DISCONNECTED) {
1575                         mutex_unlock(&dev->lock);
1576                         return -ENODEV;
1577                 }
1578                 dev->video_bytesread = 0;
1579         }
1580
1581         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1582
1583         em28xx_queue_unusedframes(dev);
1584
1585         if (count > f->buf.length)
1586                 count = f->buf.length;
1587
1588         if ((dev->video_bytesread + count) > dev->frame_size)
1589                 count = dev->frame_size - dev->video_bytesread;
1590
1591         if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1592                 em28xx_err("Error while copying to user\n");
1593                 return -EFAULT;
1594         }
1595         dev->video_bytesread += count;
1596
1597         if (dev->video_bytesread == dev->frame_size) {
1598                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1599                 list_for_each_entry(i, &dev->outqueue, frame)
1600                                     i->state = F_UNUSED;
1601                 INIT_LIST_HEAD(&dev->outqueue);
1602                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1603
1604                 em28xx_queue_unusedframes(dev);
1605                 dev->video_bytesread = 0;
1606         }
1607
1608         *f_pos += count;
1609
1610         mutex_unlock(&dev->lock);
1611
1612         return count;
1613 }
1614
1615 /*
1616  * em28xx_v4l2_poll()
1617  * will allocate buffers when called for the first time
1618  */
1619 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1620 {
1621         unsigned int mask = 0;
1622         struct em28xx_fh *fh = filp->private_data;
1623         struct em28xx *dev = fh->dev;
1624
1625         if (unlikely(res_get(fh) < 0))
1626                 return POLLERR;
1627
1628         mutex_lock(&dev->lock);
1629
1630         if (dev->state & DEV_DISCONNECTED) {
1631                 em28xx_videodbg("device not present\n");
1632         } else if (dev->state & DEV_MISCONFIGURED) {
1633                 em28xx_videodbg("device is misconfigured; close and open it again\n");
1634         } else {
1635                 if (dev->io == IO_NONE) {
1636                         if (!em28xx_request_buffers
1637                             (dev, EM28XX_NUM_READ_FRAMES)) {
1638                                 em28xx_warn
1639                                     ("poll() failed, not enough memory\n");
1640                         } else {
1641                                 dev->io = IO_READ;
1642                                 dev->stream = STREAM_ON;
1643                         }
1644                 }
1645
1646                 if (dev->io == IO_READ) {
1647                         em28xx_queue_unusedframes(dev);
1648                         poll_wait(filp, &dev->wait_frame, wait);
1649
1650                         if (!list_empty(&dev->outqueue))
1651                                 mask |= POLLIN | POLLRDNORM;
1652
1653                         mutex_unlock(&dev->lock);
1654
1655                         return mask;
1656                 }
1657         }
1658
1659         mutex_unlock(&dev->lock);
1660         return POLLERR;
1661 }
1662
1663 /*
1664  * em28xx_v4l2_mmap()
1665  */
1666 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1667 {
1668         struct em28xx_fh *fh    = filp->private_data;
1669         struct em28xx    *dev   = fh->dev;
1670         unsigned long    size   = vma->vm_end - vma->vm_start;
1671         unsigned long    start  = vma->vm_start;
1672         void             *pos;
1673         u32              i;
1674
1675         if (unlikely(res_get(fh) < 0))
1676                 return -EBUSY;
1677
1678         mutex_lock(&dev->lock);
1679
1680         if (dev->state & DEV_DISCONNECTED) {
1681                 em28xx_videodbg("mmap: device not present\n");
1682                 mutex_unlock(&dev->lock);
1683                 return -ENODEV;
1684         }
1685
1686         if (dev->state & DEV_MISCONFIGURED) {
1687                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1688                                                 "open it again\n");
1689                 mutex_unlock(&dev->lock);
1690                 return -EIO;
1691         }
1692
1693         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1694                 mutex_unlock(&dev->lock);
1695                 return -EINVAL;
1696         }
1697
1698         if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1699                 size = PAGE_ALIGN(dev->frame[0].buf.length);
1700
1701         for (i = 0; i < dev->num_frames; i++) {
1702                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1703                         break;
1704         }
1705         if (i == dev->num_frames) {
1706                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1707                 mutex_unlock(&dev->lock);
1708                 return -EINVAL;
1709         }
1710
1711         /* VM_IO is eventually going to replace PageReserved altogether */
1712         vma->vm_flags |= VM_IO;
1713         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
1714
1715         pos = dev->frame[i].bufmem;
1716         while (size > 0) {      /* size is page-aligned */
1717                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1718                         em28xx_videodbg("mmap: vm_insert_page failed\n");
1719                         mutex_unlock(&dev->lock);
1720                         return -EAGAIN;
1721                 }
1722                 start += PAGE_SIZE;
1723                 pos += PAGE_SIZE;
1724                 size -= PAGE_SIZE;
1725         }
1726
1727         vma->vm_ops = &em28xx_vm_ops;
1728         vma->vm_private_data = &dev->frame[i];
1729
1730         em28xx_vm_open(vma);
1731         mutex_unlock(&dev->lock);
1732         return 0;
1733 }
1734
1735 static const struct file_operations em28xx_v4l_fops = {
1736         .owner         = THIS_MODULE,
1737         .open          = em28xx_v4l2_open,
1738         .release       = em28xx_v4l2_close,
1739         .read          = em28xx_v4l2_read,
1740         .poll          = em28xx_v4l2_poll,
1741         .mmap          = em28xx_v4l2_mmap,
1742         .ioctl         = video_ioctl2,
1743         .llseek        = no_llseek,
1744         .compat_ioctl  = v4l_compat_ioctl32,
1745 };
1746
1747 static const struct file_operations radio_fops = {
1748         .owner         = THIS_MODULE,
1749         .open          = em28xx_v4l2_open,
1750         .release       = em28xx_v4l2_close,
1751         .ioctl         = video_ioctl2,
1752         .compat_ioctl  = v4l_compat_ioctl32,
1753         .llseek        = no_llseek,
1754 };
1755
1756 static const struct video_device em28xx_video_template = {
1757         .fops                       = &em28xx_v4l_fops,
1758         .release                    = video_device_release,
1759
1760         .minor                      = -1,
1761         .vidioc_querycap            = vidioc_querycap,
1762         .vidioc_enum_fmt_cap        = vidioc_enum_fmt_cap,
1763         .vidioc_g_fmt_cap           = vidioc_g_fmt_cap,
1764         .vidioc_try_fmt_cap         = vidioc_try_fmt_cap,
1765         .vidioc_s_fmt_cap           = vidioc_s_fmt_cap,
1766         .vidioc_g_audio             = vidioc_g_audio,
1767         .vidioc_s_audio             = vidioc_s_audio,
1768         .vidioc_cropcap             = vidioc_cropcap,
1769
1770         .vidioc_g_fmt_vbi_capture   = vidioc_g_fmt_vbi_capture,
1771         .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1772         .vidioc_s_fmt_vbi_capture   = vidioc_try_set_vbi_capture,
1773
1774         .vidioc_reqbufs             = vidioc_reqbufs,
1775         .vidioc_querybuf            = vidioc_querybuf,
1776         .vidioc_qbuf                = vidioc_qbuf,
1777         .vidioc_dqbuf               = vidioc_dqbuf,
1778         .vidioc_s_std               = vidioc_s_std,
1779         .vidioc_enum_input          = vidioc_enum_input,
1780         .vidioc_g_input             = vidioc_g_input,
1781         .vidioc_s_input             = vidioc_s_input,
1782         .vidioc_queryctrl           = vidioc_queryctrl,
1783         .vidioc_g_ctrl              = vidioc_g_ctrl,
1784         .vidioc_s_ctrl              = vidioc_s_ctrl,
1785         .vidioc_streamon            = vidioc_streamon,
1786         .vidioc_streamoff           = vidioc_streamoff,
1787         .vidioc_g_tuner             = vidioc_g_tuner,
1788         .vidioc_s_tuner             = vidioc_s_tuner,
1789         .vidioc_g_frequency         = vidioc_g_frequency,
1790         .vidioc_s_frequency         = vidioc_s_frequency,
1791 #ifdef CONFIG_VIDEO_ADV_DEBUG
1792         .vidioc_g_register          = vidioc_g_register,
1793         .vidioc_s_register          = vidioc_s_register,
1794 #endif
1795
1796         .tvnorms                    = V4L2_STD_ALL,
1797         .current_norm               = V4L2_STD_PAL,
1798 };
1799
1800 static struct video_device em28xx_radio_template = {
1801         .name                 = "em28xx-radio",
1802         .type                 = VID_TYPE_TUNER,
1803         .fops                 = &radio_fops,
1804         .minor                = -1,
1805         .vidioc_querycap      = radio_querycap,
1806         .vidioc_g_tuner       = radio_g_tuner,
1807         .vidioc_enum_input    = radio_enum_input,
1808         .vidioc_g_audio       = radio_g_audio,
1809         .vidioc_s_tuner       = radio_s_tuner,
1810         .vidioc_s_audio       = radio_s_audio,
1811         .vidioc_s_input       = radio_s_input,
1812         .vidioc_queryctrl     = radio_queryctrl,
1813         .vidioc_g_ctrl        = vidioc_g_ctrl,
1814         .vidioc_s_ctrl        = vidioc_s_ctrl,
1815         .vidioc_g_frequency   = vidioc_g_frequency,
1816         .vidioc_s_frequency   = vidioc_s_frequency,
1817 #ifdef CONFIG_VIDEO_ADV_DEBUG
1818         .vidioc_g_register    = vidioc_g_register,
1819         .vidioc_s_register    = vidioc_s_register,
1820 #endif
1821 };
1822
1823 /******************************** usb interface *****************************************/
1824
1825
1826 static LIST_HEAD(em28xx_extension_devlist);
1827 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1828
1829 int em28xx_register_extension(struct em28xx_ops *ops)
1830 {
1831         struct em28xx *h, *dev = NULL;
1832
1833         list_for_each_entry(h, &em28xx_devlist, devlist)
1834                 dev = h;
1835
1836         mutex_lock(&em28xx_extension_devlist_lock);
1837         list_add_tail(&ops->next, &em28xx_extension_devlist);
1838         if (dev)
1839                 ops->init(dev);
1840
1841         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1842         mutex_unlock(&em28xx_extension_devlist_lock);
1843
1844         return 0;
1845 }
1846 EXPORT_SYMBOL(em28xx_register_extension);
1847
1848 void em28xx_unregister_extension(struct em28xx_ops *ops)
1849 {
1850         struct em28xx *h, *dev = NULL;
1851
1852         list_for_each_entry(h, &em28xx_devlist, devlist)
1853                 dev = h;
1854
1855         if (dev)
1856                 ops->fini(dev);
1857
1858         mutex_lock(&em28xx_extension_devlist_lock);
1859         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1860         list_del(&ops->next);
1861         mutex_unlock(&em28xx_extension_devlist_lock);
1862 }
1863 EXPORT_SYMBOL(em28xx_unregister_extension);
1864
1865 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1866                                              const struct video_device *template,
1867                                              const int type,
1868                                              const char *type_name)
1869 {
1870         struct video_device *vfd;
1871
1872         vfd = video_device_alloc();
1873         if (NULL == vfd)
1874                 return NULL;
1875         *vfd = *template;
1876         vfd->minor   = -1;
1877         vfd->dev = &dev->udev->dev;
1878         vfd->release = video_device_release;
1879         vfd->type = type;
1880
1881         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1882                  dev->name, type_name);
1883
1884         return vfd;
1885 }
1886
1887
1888 /*
1889  * em28xx_init_dev()
1890  * allocates and inits the device structs, registers i2c bus and v4l device
1891  */
1892 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1893                            int minor)
1894 {
1895         struct em28xx_ops *ops = NULL;
1896         struct em28xx *dev = *devhandle;
1897         int retval = -ENOMEM;
1898         int errCode;
1899         unsigned int maxh, maxw;
1900
1901         dev->udev = udev;
1902         mutex_init(&dev->lock);
1903         spin_lock_init(&dev->queue_lock);
1904         init_waitqueue_head(&dev->open);
1905         init_waitqueue_head(&dev->wait_frame);
1906         init_waitqueue_head(&dev->wait_stream);
1907
1908         dev->em28xx_write_regs = em28xx_write_regs;
1909         dev->em28xx_read_reg = em28xx_read_reg;
1910         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1911         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1912         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1913         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1914
1915         errCode = em28xx_read_reg(dev, CHIPID_REG);
1916         if (errCode >= 0)
1917                 em28xx_info("em28xx chip ID = %d\n", errCode);
1918
1919         em28xx_pre_card_setup(dev);
1920
1921         errCode = em28xx_config(dev);
1922         if (errCode) {
1923                 em28xx_errdev("error configuring device\n");
1924                 em28xx_devused &= ~(1<<dev->devno);
1925                 kfree(dev);
1926                 return -ENOMEM;
1927         }
1928
1929         /* register i2c bus */
1930         em28xx_i2c_register(dev);
1931
1932         /* Do board specific init and eeprom reading */
1933         em28xx_card_setup(dev);
1934
1935         /* Configure audio */
1936         em28xx_audio_analog_set(dev);
1937
1938         /* configure the device */
1939         em28xx_config_i2c(dev);
1940
1941         /* set default norm */
1942         dev->norm = em28xx_video_template.current_norm;
1943
1944         maxw = norm_maxw(dev);
1945         maxh = norm_maxh(dev);
1946
1947         /* set default image size */
1948         dev->width = maxw;
1949         dev->height = maxh;
1950         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1951         dev->field_size = dev->width * dev->height;
1952         dev->frame_size =
1953             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1954         dev->bytesperline = dev->width * 2;
1955         dev->hscale = 0;
1956         dev->vscale = 0;
1957         dev->ctl_input = 2;
1958
1959         errCode = em28xx_config(dev);
1960
1961         list_add_tail(&dev->devlist, &em28xx_devlist);
1962
1963         /* allocate and fill video video_device struct */
1964         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1965                                           VID_TYPE_CAPTURE, "video");
1966         if (NULL == dev->vdev) {
1967                 em28xx_errdev("cannot allocate video_device.\n");
1968                 goto fail_unreg;
1969         }
1970         if (dev->tuner_type != TUNER_ABSENT)
1971                 dev->vdev->type |= VID_TYPE_TUNER;
1972
1973         /* register v4l2 video video_device */
1974         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1975                                        video_nr[dev->devno]);
1976         if (retval) {
1977                 em28xx_errdev("unable to register video device (error=%i).\n",
1978                               retval);
1979                 goto fail_unreg;
1980         }
1981
1982         /* Allocate and fill vbi video_device struct */
1983         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1984                                           VFL_TYPE_VBI, "vbi");
1985         /* register v4l2 vbi video_device */
1986         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1987                                         vbi_nr[dev->devno]) < 0) {
1988                 em28xx_errdev("unable to register vbi device\n");
1989                 retval = -ENODEV;
1990                 goto fail_unreg;
1991         }
1992
1993         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1994                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1995                                         VFL_TYPE_RADIO, "radio");
1996                 if (NULL == dev->radio_dev) {
1997                         em28xx_errdev("cannot allocate video_device.\n");
1998                         goto fail_unreg;
1999                 }
2000                 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2001                                             radio_nr[dev->devno]);
2002                 if (retval < 0) {
2003                         em28xx_errdev("can't register radio device\n");
2004                         goto fail_unreg;
2005                 }
2006                 em28xx_info("Registered radio device as /dev/radio%d\n",
2007                             dev->radio_dev->minor & 0x1f);
2008         }
2009
2010
2011         if (dev->has_msp34xx) {
2012                 /* Send a reset to other chips via gpio */
2013                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2014                 msleep(3);
2015                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2016                 msleep(3);
2017         }
2018
2019         video_mux(dev, 0);
2020
2021         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2022                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2023                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2024
2025         mutex_lock(&em28xx_extension_devlist_lock);
2026         if (!list_empty(&em28xx_extension_devlist)) {
2027                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2028                         if (ops->id)
2029                                 ops->init(dev);
2030                 }
2031         }
2032         mutex_unlock(&em28xx_extension_devlist_lock);
2033
2034         return 0;
2035
2036 fail_unreg:
2037         em28xx_release_resources(dev);
2038         mutex_unlock(&dev->lock);
2039         kfree(dev);
2040         return retval;
2041 }
2042
2043 #if defined(CONFIG_MODULES) && defined(MODULE)
2044 static void request_module_async(struct work_struct *work)
2045 {
2046         struct em28xx *dev = container_of(work,
2047                              struct em28xx, request_module_wk);
2048
2049         if (dev->has_audio_class)
2050                 request_module("snd-usb-audio");
2051         else
2052                 request_module("em28xx-alsa");
2053 }
2054
2055 static void request_modules(struct em28xx *dev)
2056 {
2057         INIT_WORK(&dev->request_module_wk, request_module_async);
2058         schedule_work(&dev->request_module_wk);
2059 }
2060 #else
2061 #define request_modules(dev)
2062 #endif /* CONFIG_MODULES */
2063
2064 /*
2065  * em28xx_usb_probe()
2066  * checks for supported devices
2067  */
2068 static int em28xx_usb_probe(struct usb_interface *interface,
2069                             const struct usb_device_id *id)
2070 {
2071         const struct usb_endpoint_descriptor *endpoint;
2072         struct usb_device *udev;
2073         struct usb_interface *uif;
2074         struct em28xx *dev = NULL;
2075         int retval = -ENODEV;
2076         int i, nr, ifnum;
2077
2078         udev = usb_get_dev(interface_to_usbdev(interface));
2079         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2080
2081         /* Check to see next free device and mark as used */
2082         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2083         em28xx_devused|=1<<nr;
2084
2085         /* Don't register audio interfaces */
2086         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2087                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2088                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
2089                                 ifnum,
2090                                 interface->altsetting[0].desc.bInterfaceClass);
2091
2092                 em28xx_devused&=~(1<<nr);
2093                 return -ENODEV;
2094         }
2095
2096         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2097                         udev->descriptor.idVendor,udev->descriptor.idProduct,
2098                         ifnum,
2099                         interface->altsetting[0].desc.bInterfaceClass);
2100
2101         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2102
2103         /* check if the device has the iso in endpoint at the correct place */
2104         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2105             USB_ENDPOINT_XFER_ISOC) {
2106                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2107                 em28xx_devused&=~(1<<nr);
2108                 return -ENODEV;
2109         }
2110         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2111                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2112                 em28xx_devused&=~(1<<nr);
2113                 return -ENODEV;
2114         }
2115
2116         if (nr >= EM28XX_MAXBOARDS) {
2117                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2118                 em28xx_devused&=~(1<<nr);
2119                 return -ENOMEM;
2120         }
2121
2122         /* allocate memory for our device state and initialize it */
2123         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2124         if (dev == NULL) {
2125                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2126                 em28xx_devused&=~(1<<nr);
2127                 return -ENOMEM;
2128         }
2129
2130         snprintf(dev->name, 29, "em28xx #%d", nr);
2131         dev->devno = nr;
2132         dev->model = id->driver_info;
2133
2134         /* Checks if audio is provided by some interface */
2135         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2136                 uif = udev->config->interface[i];
2137                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2138                         dev->has_audio_class = 1;
2139                         break;
2140                 }
2141         }
2142
2143         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2144                    dev->has_audio_class ? "Has" : "Doesn't have");
2145
2146         /* compute alternate max packet sizes */
2147         uif = udev->actconfig->interface[0];
2148
2149         dev->num_alt=uif->num_altsetting;
2150         em28xx_info("Alternate settings: %i\n",dev->num_alt);
2151 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2152         dev->alt_max_pkt_size = kmalloc(32*
2153                                                 dev->num_alt,GFP_KERNEL);
2154         if (dev->alt_max_pkt_size == NULL) {
2155                 em28xx_errdev("out of memory!\n");
2156                 em28xx_devused&=~(1<<nr);
2157                 kfree(dev);
2158                 return -ENOMEM;
2159         }
2160
2161         for (i = 0; i < dev->num_alt ; i++) {
2162                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2163                                                         wMaxPacketSize);
2164                 dev->alt_max_pkt_size[i] =
2165                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2166                 em28xx_info("Alternate setting %i, max size= %i\n",i,
2167                                                         dev->alt_max_pkt_size[i]);
2168         }
2169
2170         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2171                 dev->model = card[nr];
2172
2173         /* allocate device struct */
2174         retval = em28xx_init_dev(&dev, udev, nr);
2175         if (retval)
2176                 return retval;
2177
2178         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2179
2180         /* save our data pointer in this interface device */
2181         usb_set_intfdata(interface, dev);
2182
2183         request_modules(dev);
2184
2185         return 0;
2186 }
2187
2188 /*
2189  * em28xx_usb_disconnect()
2190  * called when the device gets diconencted
2191  * video device will be unregistered on v4l2_close in case it is still open
2192  */
2193 static void em28xx_usb_disconnect(struct usb_interface *interface)
2194 {
2195         struct em28xx *dev;
2196         struct em28xx_ops *ops = NULL;
2197
2198         dev = usb_get_intfdata(interface);
2199         usb_set_intfdata(interface, NULL);
2200
2201         if (!dev)
2202                 return;
2203
2204         em28xx_info("disconnecting %s\n", dev->vdev->name);
2205
2206         /* wait until all current v4l2 io is finished then deallocate resources */
2207         mutex_lock(&dev->lock);
2208
2209         wake_up_interruptible_all(&dev->open);
2210
2211         if (dev->users) {
2212                 em28xx_warn
2213                     ("device /dev/video%d is open! Deregistration and memory "
2214                      "deallocation are deferred on close.\n",
2215                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2216
2217                 dev->state |= DEV_MISCONFIGURED;
2218                 em28xx_uninit_isoc(dev);
2219                 dev->state |= DEV_DISCONNECTED;
2220                 wake_up_interruptible(&dev->wait_frame);
2221                 wake_up_interruptible(&dev->wait_stream);
2222         } else {
2223                 dev->state |= DEV_DISCONNECTED;
2224                 em28xx_release_resources(dev);
2225         }
2226         mutex_unlock(&dev->lock);
2227
2228         mutex_lock(&em28xx_extension_devlist_lock);
2229         if (!list_empty(&em28xx_extension_devlist)) {
2230                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2231                         ops->fini(dev);
2232                 }
2233         }
2234         mutex_unlock(&em28xx_extension_devlist_lock);
2235
2236         if (!dev->users) {
2237                 kfree(dev->alt_max_pkt_size);
2238                 kfree(dev);
2239         }
2240 }
2241
2242 static struct usb_driver em28xx_usb_driver = {
2243         .name = "em28xx",
2244         .probe = em28xx_usb_probe,
2245         .disconnect = em28xx_usb_disconnect,
2246         .id_table = em28xx_id_table,
2247 };
2248
2249 static int __init em28xx_module_init(void)
2250 {
2251         int result;
2252
2253         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2254                (EM28XX_VERSION_CODE >> 16) & 0xff,
2255                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2256 #ifdef SNAPSHOT
2257         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2258                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2259 #endif
2260
2261         /* register this driver with the USB subsystem */
2262         result = usb_register(&em28xx_usb_driver);
2263         if (result)
2264                 em28xx_err(DRIVER_NAME
2265                            " usb_register failed. Error number %d.\n", result);
2266
2267         return result;
2268 }
2269
2270 static void __exit em28xx_module_exit(void)
2271 {
2272         /* deregister this driver with the USB subsystem */
2273         usb_deregister(&em28xx_usb_driver);
2274 }
2275
2276 module_init(em28xx_module_init);
2277 module_exit(em28xx_module_exit);