V4L/DVB (9668): em28xx: fix a race condition with hald
[linux-2.6] / drivers / media / video / em28xx / em28xx-video.c
1 /*
2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
3                     video capture devices
4
5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
6                       Markus Rechberger <mrechberger@gmail.com>
7                       Mauro Carvalho Chehab <mchehab@infradead.org>
8                       Sascha Sommer <saschasommer@freenet.de>
9
10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
11                 by Luca Risolia <luca.risolia@studio.unibo.it>
12
13    This program is free software; you can redistribute it and/or modify
14    it under the terms of the GNU General Public License as published by
15    the Free Software Foundation; either version 2 of the License, or
16    (at your option) any later version.
17
18    This program is distributed in the hope that it will be useful,
19    but WITHOUT ANY WARRANTY; without even the implied warranty of
20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21    GNU General Public License for more details.
22
23    You should have received a copy of the GNU General Public License
24    along with this program; if not, write to the Free Software
25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26  */
27
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/bitmap.h>
33 #include <linux/usb.h>
34 #include <linux/i2c.h>
35 #include <linux/version.h>
36 #include <linux/mm.h>
37 #include <linux/mutex.h>
38
39 #include "em28xx.h"
40 #include <media/v4l2-common.h>
41 #include <media/v4l2-ioctl.h>
42 #include <media/msp3400.h>
43 #include <media/tuner.h>
44
45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
46                       "Markus Rechberger <mrechberger@gmail.com>, " \
47                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
48                       "Sascha Sommer <saschasommer@freenet.de>"
49
50 #define DRIVER_NAME         "em28xx"
51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
52 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
53
54 #define em28xx_videodbg(fmt, arg...) do {\
55         if (video_debug) \
56                 printk(KERN_INFO "%s %s :"fmt, \
57                          dev->name, __func__ , ##arg); } while (0)
58
59 static unsigned int isoc_debug;
60 module_param(isoc_debug, int, 0644);
61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
62
63 #define em28xx_isocdbg(fmt, arg...) \
64 do {\
65         if (isoc_debug) { \
66                 printk(KERN_INFO "%s %s :"fmt, \
67                          dev->name, __func__ , ##arg); \
68         } \
69   } while (0)
70
71 MODULE_AUTHOR(DRIVER_AUTHOR);
72 MODULE_DESCRIPTION(DRIVER_DESC);
73 MODULE_LICENSE("GPL");
74
75 static LIST_HEAD(em28xx_devlist);
76 static DEFINE_MUTEX(em28xx_devlist_mutex);
77
78 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
79 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
80 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
81 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
82
83 module_param_array(card,  int, NULL, 0444);
84 module_param_array(video_nr, int, NULL, 0444);
85 module_param_array(vbi_nr, int, NULL, 0444);
86 module_param_array(radio_nr, int, NULL, 0444);
87 MODULE_PARM_DESC(card,     "card type");
88 MODULE_PARM_DESC(video_nr, "video device numbers");
89 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
90 MODULE_PARM_DESC(radio_nr, "radio device numbers");
91
92 static unsigned int video_debug;
93 module_param(video_debug, int, 0644);
94 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
95
96 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
97 static unsigned long em28xx_devused;
98
99 /* supported controls */
100 /* Common to all boards */
101 static struct v4l2_queryctrl em28xx_qctrl[] = {
102         {
103                 .id = V4L2_CID_AUDIO_VOLUME,
104                 .type = V4L2_CTRL_TYPE_INTEGER,
105                 .name = "Volume",
106                 .minimum = 0x0,
107                 .maximum = 0x1f,
108                 .step = 0x1,
109                 .default_value = 0x1f,
110                 .flags = 0,
111         }, {
112                 .id = V4L2_CID_AUDIO_MUTE,
113                 .type = V4L2_CTRL_TYPE_BOOLEAN,
114                 .name = "Mute",
115                 .minimum = 0,
116                 .maximum = 1,
117                 .step = 1,
118                 .default_value = 1,
119                 .flags = 0,
120         }
121 };
122
123 static struct usb_driver em28xx_usb_driver;
124
125 /* ------------------------------------------------------------------
126         DMA and thread functions
127    ------------------------------------------------------------------*/
128
129 /*
130  * Announces that a buffer were filled and request the next
131  */
132 static inline void buffer_filled(struct em28xx *dev,
133                                   struct em28xx_dmaqueue *dma_q,
134                                   struct em28xx_buffer *buf)
135 {
136         /* Advice that buffer was filled */
137         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
138         buf->vb.state = VIDEOBUF_DONE;
139         buf->vb.field_count++;
140         do_gettimeofday(&buf->vb.ts);
141
142         dev->isoc_ctl.buf = NULL;
143
144         list_del(&buf->vb.queue);
145         wake_up(&buf->vb.done);
146 }
147
148 /*
149  * Identify the buffer header type and properly handles
150  */
151 static void em28xx_copy_video(struct em28xx *dev,
152                               struct em28xx_dmaqueue  *dma_q,
153                               struct em28xx_buffer *buf,
154                               unsigned char *p,
155                               unsigned char *outp, unsigned long len)
156 {
157         void *fieldstart, *startwrite, *startread;
158         int  linesdone, currlinedone, offset, lencopy, remain;
159         int bytesperline = dev->width << 1;
160
161         if (dma_q->pos + len > buf->vb.size)
162                 len = buf->vb.size - dma_q->pos;
163
164         if (p[0] != 0x88 && p[0] != 0x22) {
165                 em28xx_isocdbg("frame is not complete\n");
166                 len += 4;
167         } else
168                 p += 4;
169
170         startread = p;
171         remain = len;
172
173         /* Interlaces frame */
174         if (buf->top_field)
175                 fieldstart = outp;
176         else
177                 fieldstart = outp + bytesperline;
178
179         linesdone = dma_q->pos / bytesperline;
180         currlinedone = dma_q->pos % bytesperline;
181         offset = linesdone * bytesperline * 2 + currlinedone;
182         startwrite = fieldstart + offset;
183         lencopy = bytesperline - currlinedone;
184         lencopy = lencopy > remain ? remain : lencopy;
185
186         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
187                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
188                                ((char *)startwrite + lencopy) -
189                                ((char *)outp + buf->vb.size));
190                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
191         }
192         if (lencopy <= 0)
193                 return;
194         memcpy(startwrite, startread, lencopy);
195
196         remain -= lencopy;
197
198         while (remain > 0) {
199                 startwrite += lencopy + bytesperline;
200                 startread += lencopy;
201                 if (bytesperline > remain)
202                         lencopy = remain;
203                 else
204                         lencopy = bytesperline;
205
206                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
207                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
208                                        ((char *)startwrite + lencopy) -
209                                        ((char *)outp + buf->vb.size));
210                         lencopy = remain = (char *)outp + buf->vb.size -
211                                            (char *)startwrite;
212                 }
213                 if (lencopy <= 0)
214                         break;
215
216                 memcpy(startwrite, startread, lencopy);
217
218                 remain -= lencopy;
219         }
220
221         dma_q->pos += len;
222 }
223
224 static inline void print_err_status(struct em28xx *dev,
225                                      int packet, int status)
226 {
227         char *errmsg = "Unknown";
228
229         switch (status) {
230         case -ENOENT:
231                 errmsg = "unlinked synchronuously";
232                 break;
233         case -ECONNRESET:
234                 errmsg = "unlinked asynchronuously";
235                 break;
236         case -ENOSR:
237                 errmsg = "Buffer error (overrun)";
238                 break;
239         case -EPIPE:
240                 errmsg = "Stalled (device not responding)";
241                 break;
242         case -EOVERFLOW:
243                 errmsg = "Babble (bad cable?)";
244                 break;
245         case -EPROTO:
246                 errmsg = "Bit-stuff error (bad cable?)";
247                 break;
248         case -EILSEQ:
249                 errmsg = "CRC/Timeout (could be anything)";
250                 break;
251         case -ETIME:
252                 errmsg = "Device does not respond";
253                 break;
254         }
255         if (packet < 0) {
256                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
257         } else {
258                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
259                                packet, status, errmsg);
260         }
261 }
262
263 /*
264  * video-buf generic routine to get the next available buffer
265  */
266 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
267                                           struct em28xx_buffer **buf)
268 {
269         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
270         char *outp;
271
272         if (list_empty(&dma_q->active)) {
273                 em28xx_isocdbg("No active queue to serve\n");
274                 dev->isoc_ctl.buf = NULL;
275                 *buf = NULL;
276                 return;
277         }
278
279         /* Get the next buffer */
280         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
281
282         /* Cleans up buffer - Usefull for testing for frame/URB loss */
283         outp = videobuf_to_vmalloc(&(*buf)->vb);
284         memset(outp, 0, (*buf)->vb.size);
285
286         dev->isoc_ctl.buf = *buf;
287
288         return;
289 }
290
291 /*
292  * Controls the isoc copy of each urb packet
293  */
294 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
295 {
296         struct em28xx_buffer    *buf;
297         struct em28xx_dmaqueue  *dma_q = urb->context;
298         unsigned char *outp = NULL;
299         int i, len = 0, rc = 1;
300         unsigned char *p;
301
302         if (!dev)
303                 return 0;
304
305         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
306                 return 0;
307
308         if (urb->status < 0) {
309                 print_err_status(dev, -1, urb->status);
310                 if (urb->status == -ENOENT)
311                         return 0;
312         }
313
314         buf = dev->isoc_ctl.buf;
315         if (buf != NULL)
316                 outp = videobuf_to_vmalloc(&buf->vb);
317
318         for (i = 0; i < urb->number_of_packets; i++) {
319                 int status = urb->iso_frame_desc[i].status;
320
321                 if (status < 0) {
322                         print_err_status(dev, i, status);
323                         if (urb->iso_frame_desc[i].status != -EPROTO)
324                                 continue;
325                 }
326
327                 len = urb->iso_frame_desc[i].actual_length - 4;
328
329                 if (urb->iso_frame_desc[i].actual_length <= 0) {
330                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
331                         continue;
332                 }
333                 if (urb->iso_frame_desc[i].actual_length >
334                                                 dev->max_pkt_size) {
335                         em28xx_isocdbg("packet bigger than packet size");
336                         continue;
337                 }
338
339                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
340
341                 /* FIXME: incomplete buffer checks where removed to make
342                    logic simpler. Impacts of those changes should be evaluated
343                  */
344                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
345                         em28xx_isocdbg("VBI HEADER!!!\n");
346                         /* FIXME: Should add vbi copy */
347                         continue;
348                 }
349                 if (p[0] == 0x22 && p[1] == 0x5a) {
350                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
351                                        len, (p[2] & 1)? "odd" : "even");
352
353                         if (!(p[2] & 1)) {
354                                 if (buf != NULL)
355                                         buffer_filled(dev, dma_q, buf);
356                                 get_next_buf(dma_q, &buf);
357                                 if (buf == NULL)
358                                         outp = NULL;
359                                 else
360                                         outp = videobuf_to_vmalloc(&buf->vb);
361                         }
362
363                         if (buf != NULL) {
364                                 if (p[2] & 1)
365                                         buf->top_field = 0;
366                                 else
367                                         buf->top_field = 1;
368                         }
369
370                         dma_q->pos = 0;
371                 }
372                 if (buf != NULL)
373                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
374         }
375         return rc;
376 }
377
378 /* ------------------------------------------------------------------
379         Videobuf operations
380    ------------------------------------------------------------------*/
381
382 static int
383 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
384 {
385         struct em28xx_fh *fh = vq->priv_data;
386         struct em28xx        *dev = fh->dev;
387         struct v4l2_frequency f;
388
389         *size = 16 * fh->dev->width * fh->dev->height >> 3;
390         if (0 == *count)
391                 *count = EM28XX_DEF_BUF;
392
393         if (*count < EM28XX_MIN_BUF)
394                 *count = EM28XX_MIN_BUF;
395
396         /* Ask tuner to go to analog mode */
397         memset(&f, 0, sizeof(f));
398         f.frequency = dev->ctl_freq;
399
400         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
401
402         return 0;
403 }
404
405 /* This is called *without* dev->slock held; please keep it that way */
406 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
407 {
408         struct em28xx_fh     *fh  = vq->priv_data;
409         struct em28xx        *dev = fh->dev;
410         unsigned long flags = 0;
411         if (in_interrupt())
412                 BUG();
413
414         /* We used to wait for the buffer to finish here, but this didn't work
415            because, as we were keeping the state as VIDEOBUF_QUEUED,
416            videobuf_queue_cancel marked it as finished for us.
417            (Also, it could wedge forever if the hardware was misconfigured.)
418
419            This should be safe; by the time we get here, the buffer isn't
420            queued anymore. If we ever start marking the buffers as
421            VIDEOBUF_ACTIVE, it won't be, though.
422         */
423         spin_lock_irqsave(&dev->slock, flags);
424         if (dev->isoc_ctl.buf == buf)
425                 dev->isoc_ctl.buf = NULL;
426         spin_unlock_irqrestore(&dev->slock, flags);
427
428         videobuf_vmalloc_free(&buf->vb);
429         buf->vb.state = VIDEOBUF_NEEDS_INIT;
430 }
431
432 static int
433 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
434                                                 enum v4l2_field field)
435 {
436         struct em28xx_fh     *fh  = vq->priv_data;
437         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
438         struct em28xx        *dev = fh->dev;
439         int                  rc = 0, urb_init = 0;
440
441         /* FIXME: It assumes depth = 16 */
442         /* The only currently supported format is 16 bits/pixel */
443         buf->vb.size = 16 * dev->width * dev->height >> 3;
444
445         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
446                 return -EINVAL;
447
448         buf->vb.width  = dev->width;
449         buf->vb.height = dev->height;
450         buf->vb.field  = field;
451
452         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
453                 rc = videobuf_iolock(vq, &buf->vb, NULL);
454                 if (rc < 0)
455                         goto fail;
456         }
457
458         if (!dev->isoc_ctl.num_bufs)
459                 urb_init = 1;
460
461         if (urb_init) {
462                 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
463                                       EM28XX_NUM_BUFS, dev->max_pkt_size,
464                                       em28xx_isoc_copy);
465                 if (rc < 0)
466                         goto fail;
467         }
468
469         buf->vb.state = VIDEOBUF_PREPARED;
470         return 0;
471
472 fail:
473         free_buffer(vq, buf);
474         return rc;
475 }
476
477 static void
478 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
479 {
480         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
481         struct em28xx_fh        *fh      = vq->priv_data;
482         struct em28xx           *dev     = fh->dev;
483         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
484
485         buf->vb.state = VIDEOBUF_QUEUED;
486         list_add_tail(&buf->vb.queue, &vidq->active);
487
488 }
489
490 static void buffer_release(struct videobuf_queue *vq,
491                                 struct videobuf_buffer *vb)
492 {
493         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
494         struct em28xx_fh       *fh   = vq->priv_data;
495         struct em28xx          *dev  = (struct em28xx *)fh->dev;
496
497         em28xx_isocdbg("em28xx: called buffer_release\n");
498
499         free_buffer(vq, buf);
500 }
501
502 static struct videobuf_queue_ops em28xx_video_qops = {
503         .buf_setup      = buffer_setup,
504         .buf_prepare    = buffer_prepare,
505         .buf_queue      = buffer_queue,
506         .buf_release    = buffer_release,
507 };
508
509 /*********************  v4l2 interface  **************************************/
510
511 /*
512  * em28xx_config()
513  * inits registers with sane defaults
514  */
515 static int em28xx_config(struct em28xx *dev)
516 {
517         int retval;
518
519         /* Sets I2C speed to 100 KHz */
520         if (!dev->is_em2800) {
521                 retval = em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
522                 if (retval < 0) {
523                         em28xx_errdev("%s: em28xx_write_regs_req failed! retval [%d]\n",
524                                 __func__, retval);
525                         return retval;
526                 }
527         }
528
529         /* enable vbi capturing */
530
531 /*      em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
532 /*      em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
533         em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
534
535         dev->mute = 1;          /* maybe not the right place... */
536         dev->volume = 0x1f;
537
538         em28xx_outfmt_set_yuv422(dev);
539         em28xx_colorlevels_set_default(dev);
540         em28xx_compression_disable(dev);
541
542         return 0;
543 }
544
545 /*
546  * em28xx_config_i2c()
547  * configure i2c attached devices
548  */
549 static void em28xx_config_i2c(struct em28xx *dev)
550 {
551         struct v4l2_routing route;
552
553         route.input = INPUT(dev->ctl_input)->vmux;
554         route.output = 0;
555         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
556         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
557         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
558 }
559
560 static void video_mux(struct em28xx *dev, int index)
561 {
562         struct v4l2_routing route;
563
564         route.input = INPUT(index)->vmux;
565         route.output = 0;
566         dev->ctl_input = index;
567         dev->ctl_ainput = INPUT(index)->amux;
568
569         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
570
571         if (dev->has_msp34xx) {
572                 if (dev->i2s_speed) {
573                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
574                                 &dev->i2s_speed);
575                 }
576                 route.input = dev->ctl_ainput;
577                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
578                 /* Note: this is msp3400 specific */
579                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
580                         &route);
581         }
582
583         em28xx_audio_analog_set(dev);
584 }
585
586 /* Usage lock check functions */
587 static int res_get(struct em28xx_fh *fh)
588 {
589         struct em28xx    *dev = fh->dev;
590         int              rc   = 0;
591
592         /* This instance already has stream_on */
593         if (fh->stream_on)
594                 return rc;
595
596         if (dev->stream_on)
597                 return -EINVAL;
598
599         mutex_lock(&dev->lock);
600         dev->stream_on = 1;
601         fh->stream_on  = 1;
602         mutex_unlock(&dev->lock);
603         return rc;
604 }
605
606 static int res_check(struct em28xx_fh *fh)
607 {
608         return (fh->stream_on);
609 }
610
611 static void res_free(struct em28xx_fh *fh)
612 {
613         struct em28xx    *dev = fh->dev;
614
615         mutex_lock(&dev->lock);
616         fh->stream_on = 0;
617         dev->stream_on = 0;
618         mutex_unlock(&dev->lock);
619 }
620
621 /*
622  * em28xx_get_ctrl()
623  * return the current saturation, brightness or contrast, mute state
624  */
625 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
626 {
627         switch (ctrl->id) {
628         case V4L2_CID_AUDIO_MUTE:
629                 ctrl->value = dev->mute;
630                 return 0;
631         case V4L2_CID_AUDIO_VOLUME:
632                 ctrl->value = dev->volume;
633                 return 0;
634         default:
635                 return -EINVAL;
636         }
637 }
638
639 /*
640  * em28xx_set_ctrl()
641  * mute or set new saturation, brightness or contrast
642  */
643 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
644 {
645         switch (ctrl->id) {
646         case V4L2_CID_AUDIO_MUTE:
647                 if (ctrl->value != dev->mute) {
648                         dev->mute = ctrl->value;
649                         return em28xx_audio_analog_set(dev);
650                 }
651                 return 0;
652         case V4L2_CID_AUDIO_VOLUME:
653                 dev->volume = ctrl->value;
654                 return em28xx_audio_analog_set(dev);
655         default:
656                 return -EINVAL;
657         }
658 }
659
660 static int check_dev(struct em28xx *dev)
661 {
662         if (dev->state & DEV_DISCONNECTED) {
663                 em28xx_errdev("v4l2 ioctl: device not present\n");
664                 return -ENODEV;
665         }
666
667         if (dev->state & DEV_MISCONFIGURED) {
668                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
669                               "close and open it again\n");
670                 return -EIO;
671         }
672         return 0;
673 }
674
675 static void get_scale(struct em28xx *dev,
676                         unsigned int width, unsigned int height,
677                         unsigned int *hscale, unsigned int *vscale)
678 {
679         unsigned int          maxw   = norm_maxw(dev);
680         unsigned int          maxh   = norm_maxh(dev);
681
682         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
683         if (*hscale >= 0x4000)
684                 *hscale = 0x3fff;
685
686         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
687         if (*vscale >= 0x4000)
688                 *vscale = 0x3fff;
689 }
690
691 /* ------------------------------------------------------------------
692         IOCTL vidioc handling
693    ------------------------------------------------------------------*/
694
695 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
696                                         struct v4l2_format *f)
697 {
698         struct em28xx_fh      *fh  = priv;
699         struct em28xx         *dev = fh->dev;
700
701         mutex_lock(&dev->lock);
702
703         f->fmt.pix.width = dev->width;
704         f->fmt.pix.height = dev->height;
705         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
706         f->fmt.pix.bytesperline = dev->width * 2;
707         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
708         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
709
710         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
711         f->fmt.pix.field = dev->interlaced ?
712                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
713
714         mutex_unlock(&dev->lock);
715         return 0;
716 }
717
718 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
719                         struct v4l2_format *f)
720 {
721         struct em28xx_fh      *fh    = priv;
722         struct em28xx         *dev   = fh->dev;
723         int                   width  = f->fmt.pix.width;
724         int                   height = f->fmt.pix.height;
725         unsigned int          maxw   = norm_maxw(dev);
726         unsigned int          maxh   = norm_maxh(dev);
727         unsigned int          hscale, vscale;
728
729         /* width must even because of the YUYV format
730            height must be even because of interlacing */
731         height &= 0xfffe;
732         width &= 0xfffe;
733
734         if (height < 32)
735                 height = 32;
736         if (height > maxh)
737                 height = maxh;
738         if (width < 48)
739                 width = 48;
740         if (width > maxw)
741                 width = maxw;
742
743         mutex_lock(&dev->lock);
744
745         if (dev->is_em2800) {
746                 /* the em2800 can only scale down to 50% */
747                 if (height % (maxh / 2))
748                         height = maxh;
749                 if (width % (maxw / 2))
750                         width = maxw;
751                 /* according to empiatech support */
752                 /* the MaxPacketSize is to small to support */
753                 /* framesizes larger than 640x480 @ 30 fps */
754                 /* or 640x576 @ 25 fps. As this would cut */
755                 /* of a part of the image we prefer */
756                 /* 360x576 or 360x480 for now */
757                 if (width == maxw && height == maxh)
758                         width /= 2;
759         }
760
761         get_scale(dev, width, height, &hscale, &vscale);
762
763         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
764         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
765
766         f->fmt.pix.width = width;
767         f->fmt.pix.height = height;
768         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
769         f->fmt.pix.bytesperline = width * 2;
770         f->fmt.pix.sizeimage = width * 2 * height;
771         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
772         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
773
774         mutex_unlock(&dev->lock);
775         return 0;
776 }
777
778 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
779                         struct v4l2_format *f)
780 {
781         struct em28xx_fh      *fh  = priv;
782         struct em28xx         *dev = fh->dev;
783         int                   rc;
784
785         rc = check_dev(dev);
786         if (rc < 0)
787                 return rc;
788
789         vidioc_try_fmt_vid_cap(file, priv, f);
790
791         mutex_lock(&dev->lock);
792
793         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
794                 em28xx_errdev("%s queue busy\n", __func__);
795                 rc = -EBUSY;
796                 goto out;
797         }
798
799         if (dev->stream_on && !fh->stream_on) {
800                 em28xx_errdev("%s device in use by another fh\n", __func__);
801                 rc = -EBUSY;
802                 goto out;
803         }
804
805         /* set new image size */
806         dev->width = f->fmt.pix.width;
807         dev->height = f->fmt.pix.height;
808         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
809
810         em28xx_set_alternate(dev);
811         em28xx_resolution_set(dev);
812
813         rc = 0;
814
815 out:
816         mutex_unlock(&dev->lock);
817         return rc;
818 }
819
820 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
821 {
822         struct em28xx_fh   *fh  = priv;
823         struct em28xx      *dev = fh->dev;
824         struct v4l2_format f;
825         int                rc;
826
827         rc = check_dev(dev);
828         if (rc < 0)
829                 return rc;
830
831         mutex_lock(&dev->lock);
832         dev->norm = *norm;
833         mutex_unlock(&dev->lock);
834
835         /* Adjusts width/height, if needed */
836         f.fmt.pix.width = dev->width;
837         f.fmt.pix.height = dev->height;
838         vidioc_try_fmt_vid_cap(file, priv, &f);
839
840         mutex_lock(&dev->lock);
841
842         /* set new image size */
843         dev->width = f.fmt.pix.width;
844         dev->height = f.fmt.pix.height;
845         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
846
847         em28xx_resolution_set(dev);
848         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
849
850         mutex_unlock(&dev->lock);
851         return 0;
852 }
853
854 static const char *iname[] = {
855         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
856         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
857         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
858         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
859         [EM28XX_VMUX_SVIDEO]     = "S-Video",
860         [EM28XX_VMUX_TELEVISION] = "Television",
861         [EM28XX_VMUX_CABLE]      = "Cable TV",
862         [EM28XX_VMUX_DVB]        = "DVB",
863         [EM28XX_VMUX_DEBUG]      = "for debug only",
864 };
865
866 static int vidioc_enum_input(struct file *file, void *priv,
867                                 struct v4l2_input *i)
868 {
869         struct em28xx_fh   *fh  = priv;
870         struct em28xx      *dev = fh->dev;
871         unsigned int       n;
872
873         n = i->index;
874         if (n >= MAX_EM28XX_INPUT)
875                 return -EINVAL;
876         if (0 == INPUT(n)->type)
877                 return -EINVAL;
878
879         i->index = n;
880         i->type = V4L2_INPUT_TYPE_CAMERA;
881
882         strcpy(i->name, iname[INPUT(n)->type]);
883
884         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
885                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
886                 i->type = V4L2_INPUT_TYPE_TUNER;
887
888         i->std = dev->vdev->tvnorms;
889
890         return 0;
891 }
892
893 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
894 {
895         struct em28xx_fh   *fh  = priv;
896         struct em28xx      *dev = fh->dev;
897
898         *i = dev->ctl_input;
899
900         return 0;
901 }
902
903 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
904 {
905         struct em28xx_fh   *fh  = priv;
906         struct em28xx      *dev = fh->dev;
907         int                rc;
908
909         rc = check_dev(dev);
910         if (rc < 0)
911                 return rc;
912
913         if (i >= MAX_EM28XX_INPUT)
914                 return -EINVAL;
915         if (0 == INPUT(i)->type)
916                 return -EINVAL;
917
918         mutex_lock(&dev->lock);
919
920         video_mux(dev, i);
921
922         mutex_unlock(&dev->lock);
923         return 0;
924 }
925
926 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
927 {
928         struct em28xx_fh   *fh    = priv;
929         struct em28xx      *dev   = fh->dev;
930         unsigned int        index = a->index;
931
932         if (a->index > 1)
933                 return -EINVAL;
934
935         index = dev->ctl_ainput;
936
937         if (index == 0)
938                 strcpy(a->name, "Television");
939         else
940                 strcpy(a->name, "Line In");
941
942         a->capability = V4L2_AUDCAP_STEREO;
943         a->index = index;
944
945         return 0;
946 }
947
948 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
949 {
950         struct em28xx_fh   *fh  = priv;
951         struct em28xx      *dev = fh->dev;
952
953         if (a->index != dev->ctl_ainput)
954                 return -EINVAL;
955
956         return 0;
957 }
958
959 static int vidioc_queryctrl(struct file *file, void *priv,
960                                 struct v4l2_queryctrl *qc)
961 {
962         struct em28xx_fh      *fh  = priv;
963         struct em28xx         *dev = fh->dev;
964         int                   id  = qc->id;
965         int                   i;
966         int                   rc;
967
968         rc = check_dev(dev);
969         if (rc < 0)
970                 return rc;
971
972         memset(qc, 0, sizeof(*qc));
973
974         qc->id = id;
975
976         if (!dev->has_msp34xx) {
977                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
978                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
979                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
980                                 return 0;
981                         }
982                 }
983         }
984         mutex_lock(&dev->lock);
985         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
986         mutex_unlock(&dev->lock);
987
988         if (qc->type)
989                 return 0;
990         else
991                 return -EINVAL;
992 }
993
994 static int vidioc_g_ctrl(struct file *file, void *priv,
995                                 struct v4l2_control *ctrl)
996 {
997         struct em28xx_fh      *fh  = priv;
998         struct em28xx         *dev = fh->dev;
999         int                   rc;
1000
1001         rc = check_dev(dev);
1002         if (rc < 0)
1003                 return rc;
1004         mutex_lock(&dev->lock);
1005
1006         if (!dev->has_msp34xx)
1007                 rc = em28xx_get_ctrl(dev, ctrl);
1008         else
1009                 rc = -EINVAL;
1010
1011         if (rc == -EINVAL) {
1012                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1013                 rc = 0;
1014         }
1015
1016         mutex_unlock(&dev->lock);
1017         return rc;
1018 }
1019
1020 static int vidioc_s_ctrl(struct file *file, void *priv,
1021                                 struct v4l2_control *ctrl)
1022 {
1023         struct em28xx_fh      *fh  = priv;
1024         struct em28xx         *dev = fh->dev;
1025         u8                    i;
1026         int                   rc;
1027
1028         rc = check_dev(dev);
1029         if (rc < 0)
1030                 return rc;
1031
1032         mutex_lock(&dev->lock);
1033
1034         if (dev->has_msp34xx)
1035                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1036         else {
1037                 rc = 1;
1038                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1039                         if (ctrl->id == em28xx_qctrl[i].id) {
1040                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1041                                     ctrl->value > em28xx_qctrl[i].maximum) {
1042                                         rc = -ERANGE;
1043                                         break;
1044                                 }
1045
1046                                 rc = em28xx_set_ctrl(dev, ctrl);
1047                                 break;
1048                         }
1049                 }
1050         }
1051
1052         /* Control not found - try to send it to the attached devices */
1053         if (rc == 1) {
1054                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1055                 rc = 0;
1056         }
1057
1058         mutex_unlock(&dev->lock);
1059         return rc;
1060 }
1061
1062 static int vidioc_g_tuner(struct file *file, void *priv,
1063                                 struct v4l2_tuner *t)
1064 {
1065         struct em28xx_fh      *fh  = priv;
1066         struct em28xx         *dev = fh->dev;
1067         int                   rc;
1068
1069         rc = check_dev(dev);
1070         if (rc < 0)
1071                 return rc;
1072
1073         if (0 != t->index)
1074                 return -EINVAL;
1075
1076         strcpy(t->name, "Tuner");
1077
1078         mutex_lock(&dev->lock);
1079
1080         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1081
1082         mutex_unlock(&dev->lock);
1083         return 0;
1084 }
1085
1086 static int vidioc_s_tuner(struct file *file, void *priv,
1087                                 struct v4l2_tuner *t)
1088 {
1089         struct em28xx_fh      *fh  = priv;
1090         struct em28xx         *dev = fh->dev;
1091         int                   rc;
1092
1093         rc = check_dev(dev);
1094         if (rc < 0)
1095                 return rc;
1096
1097         if (0 != t->index)
1098                 return -EINVAL;
1099
1100         mutex_lock(&dev->lock);
1101
1102         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1103
1104         mutex_unlock(&dev->lock);
1105         return 0;
1106 }
1107
1108 static int vidioc_g_frequency(struct file *file, void *priv,
1109                                 struct v4l2_frequency *f)
1110 {
1111         struct em28xx_fh      *fh  = priv;
1112         struct em28xx         *dev = fh->dev;
1113
1114         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1115         f->frequency = dev->ctl_freq;
1116
1117         return 0;
1118 }
1119
1120 static int vidioc_s_frequency(struct file *file, void *priv,
1121                                 struct v4l2_frequency *f)
1122 {
1123         struct em28xx_fh      *fh  = priv;
1124         struct em28xx         *dev = fh->dev;
1125         int                   rc;
1126
1127         rc = check_dev(dev);
1128         if (rc < 0)
1129                 return rc;
1130
1131         if (0 != f->tuner)
1132                 return -EINVAL;
1133
1134         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1135                 return -EINVAL;
1136         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1137                 return -EINVAL;
1138
1139         mutex_lock(&dev->lock);
1140
1141         dev->ctl_freq = f->frequency;
1142         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1143
1144         mutex_unlock(&dev->lock);
1145         return 0;
1146 }
1147
1148 #ifdef CONFIG_VIDEO_ADV_DEBUG
1149 static int em28xx_reg_len(int reg)
1150 {
1151         switch (reg) {
1152         case EM28XX_R40_AC97LSB:
1153         case EM28XX_R30_HSCALELOW:
1154         case EM28XX_R32_VSCALELOW:
1155                 return 2;
1156         default:
1157                 return 1;
1158         }
1159 }
1160
1161 static int vidioc_g_register(struct file *file, void *priv,
1162                              struct v4l2_register *reg)
1163 {
1164         struct em28xx_fh      *fh  = priv;
1165         struct em28xx         *dev = fh->dev;
1166         int ret;
1167
1168         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1169                 return -EINVAL;
1170
1171         if (em28xx_reg_len(reg->reg) == 1) {
1172                 ret = em28xx_read_reg(dev, reg->reg);
1173                 if (ret < 0)
1174                         return ret;
1175
1176                 reg->val = ret;
1177         } else {
1178                 __le64 val = 0;
1179                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1180                                                    reg->reg, (char *)&val, 2);
1181                 if (ret < 0)
1182                         return ret;
1183
1184                 reg->val = le64_to_cpu(val);
1185         }
1186
1187         return 0;
1188 }
1189
1190 static int vidioc_s_register(struct file *file, void *priv,
1191                              struct v4l2_register *reg)
1192 {
1193         struct em28xx_fh      *fh  = priv;
1194         struct em28xx         *dev = fh->dev;
1195         __le64 buf;
1196
1197         buf = cpu_to_le64(reg->val);
1198
1199         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1200                                  em28xx_reg_len(reg->reg));
1201 }
1202 #endif
1203
1204
1205 static int vidioc_cropcap(struct file *file, void *priv,
1206                                         struct v4l2_cropcap *cc)
1207 {
1208         struct em28xx_fh      *fh  = priv;
1209         struct em28xx         *dev = fh->dev;
1210
1211         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1212                 return -EINVAL;
1213
1214         cc->bounds.left = 0;
1215         cc->bounds.top = 0;
1216         cc->bounds.width = dev->width;
1217         cc->bounds.height = dev->height;
1218         cc->defrect = cc->bounds;
1219         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1220         cc->pixelaspect.denominator = 59;
1221
1222         return 0;
1223 }
1224
1225 static int vidioc_streamon(struct file *file, void *priv,
1226                                         enum v4l2_buf_type type)
1227 {
1228         struct em28xx_fh      *fh  = priv;
1229         struct em28xx         *dev = fh->dev;
1230         int                   rc;
1231
1232         rc = check_dev(dev);
1233         if (rc < 0)
1234                 return rc;
1235
1236
1237         if (unlikely(res_get(fh) < 0))
1238                 return -EBUSY;
1239
1240         return (videobuf_streamon(&fh->vb_vidq));
1241 }
1242
1243 static int vidioc_streamoff(struct file *file, void *priv,
1244                                         enum v4l2_buf_type type)
1245 {
1246         struct em28xx_fh      *fh  = priv;
1247         struct em28xx         *dev = fh->dev;
1248         int                   rc;
1249
1250         rc = check_dev(dev);
1251         if (rc < 0)
1252                 return rc;
1253
1254         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1255                 return -EINVAL;
1256         if (type != fh->type)
1257                 return -EINVAL;
1258
1259         videobuf_streamoff(&fh->vb_vidq);
1260         res_free(fh);
1261
1262         return 0;
1263 }
1264
1265 static int vidioc_querycap(struct file *file, void  *priv,
1266                                         struct v4l2_capability *cap)
1267 {
1268         struct em28xx_fh      *fh  = priv;
1269         struct em28xx         *dev = fh->dev;
1270
1271         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1272         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1273         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1274
1275         cap->version = EM28XX_VERSION_CODE;
1276
1277         cap->capabilities =
1278                         V4L2_CAP_SLICED_VBI_CAPTURE |
1279                         V4L2_CAP_VIDEO_CAPTURE |
1280                         V4L2_CAP_AUDIO |
1281                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1282
1283         if (dev->tuner_type != TUNER_ABSENT)
1284                 cap->capabilities |= V4L2_CAP_TUNER;
1285
1286         return 0;
1287 }
1288
1289 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1290                                         struct v4l2_fmtdesc *fmtd)
1291 {
1292         if (fmtd->index != 0)
1293                 return -EINVAL;
1294
1295         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1296         strcpy(fmtd->description, "Packed YUY2");
1297         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1298         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1299
1300         return 0;
1301 }
1302
1303 /* Sliced VBI ioctls */
1304 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1305                                         struct v4l2_format *f)
1306 {
1307         struct em28xx_fh      *fh  = priv;
1308         struct em28xx         *dev = fh->dev;
1309         int                   rc;
1310
1311         rc = check_dev(dev);
1312         if (rc < 0)
1313                 return rc;
1314
1315         mutex_lock(&dev->lock);
1316
1317         f->fmt.sliced.service_set = 0;
1318
1319         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1320
1321         if (f->fmt.sliced.service_set == 0)
1322                 rc = -EINVAL;
1323
1324         mutex_unlock(&dev->lock);
1325         return rc;
1326 }
1327
1328 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1329                         struct v4l2_format *f)
1330 {
1331         struct em28xx_fh      *fh  = priv;
1332         struct em28xx         *dev = fh->dev;
1333         int                   rc;
1334
1335         rc = check_dev(dev);
1336         if (rc < 0)
1337                 return rc;
1338
1339         mutex_lock(&dev->lock);
1340         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1341         mutex_unlock(&dev->lock);
1342
1343         if (f->fmt.sliced.service_set == 0)
1344                 return -EINVAL;
1345
1346         return 0;
1347 }
1348
1349
1350 static int vidioc_reqbufs(struct file *file, void *priv,
1351                           struct v4l2_requestbuffers *rb)
1352 {
1353         struct em28xx_fh      *fh  = priv;
1354         struct em28xx         *dev = fh->dev;
1355         int                   rc;
1356
1357         rc = check_dev(dev);
1358         if (rc < 0)
1359                 return rc;
1360
1361         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1362 }
1363
1364 static int vidioc_querybuf(struct file *file, void *priv,
1365                            struct v4l2_buffer *b)
1366 {
1367         struct em28xx_fh      *fh  = priv;
1368         struct em28xx         *dev = fh->dev;
1369         int                   rc;
1370
1371         rc = check_dev(dev);
1372         if (rc < 0)
1373                 return rc;
1374
1375         return (videobuf_querybuf(&fh->vb_vidq, b));
1376 }
1377
1378 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1379 {
1380         struct em28xx_fh      *fh  = priv;
1381         struct em28xx         *dev = fh->dev;
1382         int                   rc;
1383
1384         rc = check_dev(dev);
1385         if (rc < 0)
1386                 return rc;
1387
1388         return (videobuf_qbuf(&fh->vb_vidq, b));
1389 }
1390
1391 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1392 {
1393         struct em28xx_fh      *fh  = priv;
1394         struct em28xx         *dev = fh->dev;
1395         int                   rc;
1396
1397         rc = check_dev(dev);
1398         if (rc < 0)
1399                 return rc;
1400
1401         return (videobuf_dqbuf(&fh->vb_vidq, b,
1402                                 file->f_flags & O_NONBLOCK));
1403 }
1404
1405 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1406 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1407 {
1408         struct em28xx_fh  *fh = priv;
1409
1410         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1411 }
1412 #endif
1413
1414
1415 /* ----------------------------------------------------------- */
1416 /* RADIO ESPECIFIC IOCTLS                                      */
1417 /* ----------------------------------------------------------- */
1418
1419 static int radio_querycap(struct file *file, void  *priv,
1420                           struct v4l2_capability *cap)
1421 {
1422         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1423
1424         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1425         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1426         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1427
1428         cap->version = EM28XX_VERSION_CODE;
1429         cap->capabilities = V4L2_CAP_TUNER;
1430         return 0;
1431 }
1432
1433 static int radio_g_tuner(struct file *file, void *priv,
1434                          struct v4l2_tuner *t)
1435 {
1436         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1437
1438         if (unlikely(t->index > 0))
1439                 return -EINVAL;
1440
1441         strcpy(t->name, "Radio");
1442         t->type = V4L2_TUNER_RADIO;
1443
1444         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1445         return 0;
1446 }
1447
1448 static int radio_enum_input(struct file *file, void *priv,
1449                             struct v4l2_input *i)
1450 {
1451         if (i->index != 0)
1452                 return -EINVAL;
1453         strcpy(i->name, "Radio");
1454         i->type = V4L2_INPUT_TYPE_TUNER;
1455
1456         return 0;
1457 }
1458
1459 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1460 {
1461         if (unlikely(a->index))
1462                 return -EINVAL;
1463
1464         strcpy(a->name, "Radio");
1465         return 0;
1466 }
1467
1468 static int radio_s_tuner(struct file *file, void *priv,
1469                          struct v4l2_tuner *t)
1470 {
1471         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1472
1473         if (0 != t->index)
1474                 return -EINVAL;
1475
1476         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1477
1478         return 0;
1479 }
1480
1481 static int radio_s_audio(struct file *file, void *fh,
1482                          struct v4l2_audio *a)
1483 {
1484         return 0;
1485 }
1486
1487 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1488 {
1489         return 0;
1490 }
1491
1492 static int radio_queryctrl(struct file *file, void *priv,
1493                            struct v4l2_queryctrl *qc)
1494 {
1495         int i;
1496
1497         if (qc->id <  V4L2_CID_BASE ||
1498                 qc->id >= V4L2_CID_LASTP1)
1499                 return -EINVAL;
1500
1501         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1502                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1503                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1504                         return 0;
1505                 }
1506         }
1507
1508         return -EINVAL;
1509 }
1510
1511 /*
1512  * em28xx_v4l2_open()
1513  * inits the device and starts isoc transfer
1514  */
1515 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1516 {
1517         int minor = iminor(inode);
1518         int errCode = 0, radio = 0;
1519         struct em28xx *h, *dev = NULL;
1520         struct em28xx_fh *fh;
1521         enum v4l2_buf_type fh_type = 0;
1522
1523         mutex_lock(&em28xx_devlist_mutex);
1524         list_for_each_entry(h, &em28xx_devlist, devlist) {
1525                 if (h->vdev->minor == minor) {
1526                         dev  = h;
1527                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1528                 }
1529                 if (h->vbi_dev->minor == minor) {
1530                         dev  = h;
1531                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1532                 }
1533                 if (h->radio_dev &&
1534                     h->radio_dev->minor == minor) {
1535                         radio = 1;
1536                         dev   = h;
1537                 }
1538         }
1539         mutex_unlock(&em28xx_devlist_mutex);
1540         if (NULL == dev)
1541                 return -ENODEV;
1542
1543         mutex_lock(&dev->lock);
1544
1545         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1546                                 minor, v4l2_type_names[fh_type], dev->users);
1547
1548
1549         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1550         if (!fh) {
1551                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1552                 mutex_unlock(&dev->lock);
1553                 return -ENOMEM;
1554         }
1555         fh->dev = dev;
1556         fh->radio = radio;
1557         fh->type = fh_type;
1558         filp->private_data = fh;
1559
1560         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1561                 dev->width = norm_maxw(dev);
1562                 dev->height = norm_maxh(dev);
1563                 dev->hscale = 0;
1564                 dev->vscale = 0;
1565
1566                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1567                 em28xx_set_alternate(dev);
1568                 em28xx_resolution_set(dev);
1569
1570                 /* Needed, since GPIO might have disabled power of
1571                    some i2c device
1572                  */
1573                 em28xx_config_i2c(dev);
1574
1575         }
1576         if (fh->radio) {
1577                 em28xx_videodbg("video_open: setting radio device\n");
1578                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1579         }
1580
1581         dev->users++;
1582
1583         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1584                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1585                         sizeof(struct em28xx_buffer), fh);
1586
1587         mutex_unlock(&dev->lock);
1588
1589         return errCode;
1590 }
1591
1592 /*
1593  * em28xx_realease_resources()
1594  * unregisters the v4l2,i2c and usb devices
1595  * called when the device gets disconected or at module unload
1596 */
1597 static void em28xx_release_resources(struct em28xx *dev)
1598 {
1599
1600         /*FIXME: I2C IR should be disconnected */
1601
1602         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1603                                 dev->vdev->num, dev->vbi_dev->num);
1604         list_del(&dev->devlist);
1605         if (dev->sbutton_input_dev)
1606                 em28xx_deregister_snapshot_button(dev);
1607         if (dev->radio_dev) {
1608                 if (-1 != dev->radio_dev->minor)
1609                         video_unregister_device(dev->radio_dev);
1610                 else
1611                         video_device_release(dev->radio_dev);
1612                 dev->radio_dev = NULL;
1613         }
1614         if (dev->vbi_dev) {
1615                 if (-1 != dev->vbi_dev->minor)
1616                         video_unregister_device(dev->vbi_dev);
1617                 else
1618                         video_device_release(dev->vbi_dev);
1619                 dev->vbi_dev = NULL;
1620         }
1621         if (dev->vdev) {
1622                 if (-1 != dev->vdev->minor)
1623                         video_unregister_device(dev->vdev);
1624                 else
1625                         video_device_release(dev->vdev);
1626                 dev->vdev = NULL;
1627         }
1628         em28xx_i2c_unregister(dev);
1629         usb_put_dev(dev->udev);
1630
1631         /* Mark device as unused */
1632         em28xx_devused &= ~(1<<dev->devno);
1633 }
1634
1635 /*
1636  * em28xx_v4l2_close()
1637  * stops streaming and deallocates all resources allocated by the v4l2
1638  * calls and ioctls
1639  */
1640 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1641 {
1642         struct em28xx_fh *fh  = filp->private_data;
1643         struct em28xx    *dev = fh->dev;
1644         int              errCode;
1645
1646         em28xx_videodbg("users=%d\n", dev->users);
1647
1648
1649         if (res_check(fh))
1650                 res_free(fh);
1651
1652         mutex_lock(&dev->lock);
1653
1654         if (dev->users == 1) {
1655                 videobuf_stop(&fh->vb_vidq);
1656                 videobuf_mmap_free(&fh->vb_vidq);
1657
1658                 /* the device is already disconnect,
1659                    free the remaining resources */
1660                 if (dev->state & DEV_DISCONNECTED) {
1661                         em28xx_release_resources(dev);
1662                         mutex_unlock(&dev->lock);
1663                         kfree(dev);
1664                         return 0;
1665                 }
1666
1667                 /* do this before setting alternate! */
1668                 em28xx_uninit_isoc(dev);
1669                 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1670
1671                 /* set alternate 0 */
1672                 dev->alt = 0;
1673                 em28xx_videodbg("setting alternate 0\n");
1674                 errCode = usb_set_interface(dev->udev, 0, 0);
1675                 if (errCode < 0) {
1676                         em28xx_errdev("cannot change alternate number to "
1677                                         "0 (error=%i)\n", errCode);
1678                 }
1679         }
1680         kfree(fh);
1681         dev->users--;
1682         wake_up_interruptible_nr(&dev->open, 1);
1683         mutex_unlock(&dev->lock);
1684         return 0;
1685 }
1686
1687 /*
1688  * em28xx_v4l2_read()
1689  * will allocate buffers when called for the first time
1690  */
1691 static ssize_t
1692 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1693                  loff_t *pos)
1694 {
1695         struct em28xx_fh *fh = filp->private_data;
1696         struct em28xx *dev = fh->dev;
1697         int rc;
1698
1699         rc = check_dev(dev);
1700         if (rc < 0)
1701                 return rc;
1702
1703         /* FIXME: read() is not prepared to allow changing the video
1704            resolution while streaming. Seems a bug at em28xx_set_fmt
1705          */
1706
1707         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1708                 if (unlikely(res_get(fh)))
1709                         return -EBUSY;
1710
1711                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1712                                         filp->f_flags & O_NONBLOCK);
1713         }
1714         return 0;
1715 }
1716
1717 /*
1718  * em28xx_v4l2_poll()
1719  * will allocate buffers when called for the first time
1720  */
1721 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1722 {
1723         struct em28xx_fh *fh = filp->private_data;
1724         struct em28xx *dev = fh->dev;
1725         int rc;
1726
1727         rc = check_dev(dev);
1728         if (rc < 0)
1729                 return rc;
1730
1731         if (unlikely(res_get(fh) < 0))
1732                 return POLLERR;
1733
1734         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1735                 return POLLERR;
1736
1737         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1738 }
1739
1740 /*
1741  * em28xx_v4l2_mmap()
1742  */
1743 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1744 {
1745         struct em28xx_fh *fh    = filp->private_data;
1746         struct em28xx    *dev   = fh->dev;
1747         int              rc;
1748
1749         if (unlikely(res_get(fh) < 0))
1750                 return -EBUSY;
1751
1752         rc = check_dev(dev);
1753         if (rc < 0)
1754                 return rc;
1755
1756         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1757
1758         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1759                 (unsigned long)vma->vm_start,
1760                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1761                 rc);
1762
1763         return rc;
1764 }
1765
1766 static const struct file_operations em28xx_v4l_fops = {
1767         .owner         = THIS_MODULE,
1768         .open          = em28xx_v4l2_open,
1769         .release       = em28xx_v4l2_close,
1770         .read          = em28xx_v4l2_read,
1771         .poll          = em28xx_v4l2_poll,
1772         .mmap          = em28xx_v4l2_mmap,
1773         .ioctl         = video_ioctl2,
1774         .llseek        = no_llseek,
1775         .compat_ioctl  = v4l_compat_ioctl32,
1776 };
1777
1778 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1779         .vidioc_querycap            = vidioc_querycap,
1780         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1781         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1782         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1783         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1784         .vidioc_g_audio             = vidioc_g_audio,
1785         .vidioc_s_audio             = vidioc_s_audio,
1786         .vidioc_cropcap             = vidioc_cropcap,
1787
1788         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1789         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1790         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1791
1792         .vidioc_reqbufs             = vidioc_reqbufs,
1793         .vidioc_querybuf            = vidioc_querybuf,
1794         .vidioc_qbuf                = vidioc_qbuf,
1795         .vidioc_dqbuf               = vidioc_dqbuf,
1796         .vidioc_s_std               = vidioc_s_std,
1797         .vidioc_enum_input          = vidioc_enum_input,
1798         .vidioc_g_input             = vidioc_g_input,
1799         .vidioc_s_input             = vidioc_s_input,
1800         .vidioc_queryctrl           = vidioc_queryctrl,
1801         .vidioc_g_ctrl              = vidioc_g_ctrl,
1802         .vidioc_s_ctrl              = vidioc_s_ctrl,
1803         .vidioc_streamon            = vidioc_streamon,
1804         .vidioc_streamoff           = vidioc_streamoff,
1805         .vidioc_g_tuner             = vidioc_g_tuner,
1806         .vidioc_s_tuner             = vidioc_s_tuner,
1807         .vidioc_g_frequency         = vidioc_g_frequency,
1808         .vidioc_s_frequency         = vidioc_s_frequency,
1809 #ifdef CONFIG_VIDEO_ADV_DEBUG
1810         .vidioc_g_register          = vidioc_g_register,
1811         .vidioc_s_register          = vidioc_s_register,
1812 #endif
1813 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1814         .vidiocgmbuf                = vidiocgmbuf,
1815 #endif
1816 };
1817
1818 static const struct video_device em28xx_video_template = {
1819         .fops                       = &em28xx_v4l_fops,
1820         .release                    = video_device_release,
1821         .ioctl_ops                  = &video_ioctl_ops,
1822
1823         .minor                      = -1,
1824
1825         .tvnorms                    = V4L2_STD_ALL,
1826         .current_norm               = V4L2_STD_PAL,
1827 };
1828
1829 static const struct file_operations radio_fops = {
1830         .owner         = THIS_MODULE,
1831         .open          = em28xx_v4l2_open,
1832         .release       = em28xx_v4l2_close,
1833         .ioctl         = video_ioctl2,
1834         .compat_ioctl  = v4l_compat_ioctl32,
1835         .llseek        = no_llseek,
1836 };
1837
1838 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1839         .vidioc_querycap      = radio_querycap,
1840         .vidioc_g_tuner       = radio_g_tuner,
1841         .vidioc_enum_input    = radio_enum_input,
1842         .vidioc_g_audio       = radio_g_audio,
1843         .vidioc_s_tuner       = radio_s_tuner,
1844         .vidioc_s_audio       = radio_s_audio,
1845         .vidioc_s_input       = radio_s_input,
1846         .vidioc_queryctrl     = radio_queryctrl,
1847         .vidioc_g_ctrl        = vidioc_g_ctrl,
1848         .vidioc_s_ctrl        = vidioc_s_ctrl,
1849         .vidioc_g_frequency   = vidioc_g_frequency,
1850         .vidioc_s_frequency   = vidioc_s_frequency,
1851 #ifdef CONFIG_VIDEO_ADV_DEBUG
1852         .vidioc_g_register    = vidioc_g_register,
1853         .vidioc_s_register    = vidioc_s_register,
1854 #endif
1855 };
1856
1857 static struct video_device em28xx_radio_template = {
1858         .name                 = "em28xx-radio",
1859         .fops                 = &radio_fops,
1860         .ioctl_ops            = &radio_ioctl_ops,
1861         .minor                = -1,
1862 };
1863
1864 /******************************** usb interface ******************************/
1865
1866
1867 static LIST_HEAD(em28xx_extension_devlist);
1868 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1869
1870 int em28xx_register_extension(struct em28xx_ops *ops)
1871 {
1872         struct em28xx *dev = NULL;
1873
1874         mutex_lock(&em28xx_devlist_mutex);
1875         mutex_lock(&em28xx_extension_devlist_lock);
1876         list_add_tail(&ops->next, &em28xx_extension_devlist);
1877         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1878                 if (dev)
1879                         ops->init(dev);
1880         }
1881         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1882         mutex_unlock(&em28xx_extension_devlist_lock);
1883         mutex_unlock(&em28xx_devlist_mutex);
1884         return 0;
1885 }
1886 EXPORT_SYMBOL(em28xx_register_extension);
1887
1888 void em28xx_unregister_extension(struct em28xx_ops *ops)
1889 {
1890         struct em28xx *dev = NULL;
1891
1892         mutex_lock(&em28xx_devlist_mutex);
1893         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1894                 if (dev)
1895                         ops->fini(dev);
1896         }
1897
1898         mutex_lock(&em28xx_extension_devlist_lock);
1899         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1900         list_del(&ops->next);
1901         mutex_unlock(&em28xx_extension_devlist_lock);
1902         mutex_unlock(&em28xx_devlist_mutex);
1903 }
1904 EXPORT_SYMBOL(em28xx_unregister_extension);
1905
1906 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1907                                              const struct video_device *template,
1908                                              const char *type_name)
1909 {
1910         struct video_device *vfd;
1911
1912         vfd = video_device_alloc();
1913         if (NULL == vfd)
1914                 return NULL;
1915         *vfd = *template;
1916         vfd->minor   = -1;
1917         vfd->parent = &dev->udev->dev;
1918         vfd->release = video_device_release;
1919         vfd->debug = video_debug;
1920
1921         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1922                  dev->name, type_name);
1923
1924         return vfd;
1925 }
1926
1927
1928 static int register_analog_devices(struct em28xx *dev)
1929 {
1930         int ret;
1931
1932         /* allocate and fill video video_device struct */
1933         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1934         if (!dev->vdev) {
1935                 em28xx_errdev("cannot allocate video_device.\n");
1936                 return -ENODEV;
1937         }
1938
1939         /* register v4l2 video video_device */
1940         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1941                                        video_nr[dev->devno]);
1942         if (ret) {
1943                 em28xx_errdev("unable to register video device (error=%i).\n",
1944                               ret);
1945                 return ret;
1946         }
1947
1948         /* Allocate and fill vbi video_device struct */
1949         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1950
1951         /* register v4l2 vbi video_device */
1952         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1953                                         vbi_nr[dev->devno]);
1954         if (ret < 0) {
1955                 em28xx_errdev("unable to register vbi device\n");
1956                 return ret;
1957         }
1958
1959         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1960                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
1961                 if (!dev->radio_dev) {
1962                         em28xx_errdev("cannot allocate video_device.\n");
1963                         return -ENODEV;
1964                 }
1965                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1966                                             radio_nr[dev->devno]);
1967                 if (ret < 0) {
1968                         em28xx_errdev("can't register radio device\n");
1969                         return ret;
1970                 }
1971                 em28xx_info("Registered radio device as /dev/radio%d\n",
1972                             dev->radio_dev->num);
1973         }
1974
1975         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1976                                 dev->vdev->num, dev->vbi_dev->num);
1977
1978         return 0;
1979 }
1980
1981
1982 /*
1983  * em28xx_init_dev()
1984  * allocates and inits the device structs, registers i2c bus and v4l device
1985  */
1986 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1987                            int minor)
1988 {
1989         struct em28xx_ops *ops = NULL;
1990         struct em28xx *dev = *devhandle;
1991         int retval = -ENOMEM;
1992         int errCode;
1993         unsigned int maxh, maxw;
1994
1995         dev->udev = udev;
1996         mutex_init(&dev->lock);
1997         mutex_init(&dev->ctrl_urb_lock);
1998         spin_lock_init(&dev->slock);
1999         init_waitqueue_head(&dev->open);
2000         init_waitqueue_head(&dev->wait_frame);
2001         init_waitqueue_head(&dev->wait_stream);
2002
2003         dev->em28xx_write_regs = em28xx_write_regs;
2004         dev->em28xx_read_reg = em28xx_read_reg;
2005         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2006         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2007         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2008         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2009
2010         em28xx_pre_card_setup(dev);
2011
2012         errCode = em28xx_config(dev);
2013         if (errCode) {
2014                 em28xx_errdev("error configuring device\n");
2015                 return -ENOMEM;
2016         }
2017
2018         /* register i2c bus */
2019         errCode = em28xx_i2c_register(dev);
2020         if (errCode < 0) {
2021                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2022                         __func__, errCode);
2023                 return errCode;
2024         }
2025
2026         /* Do board specific init and eeprom reading */
2027         em28xx_card_setup(dev);
2028
2029         /* Configure audio */
2030         errCode = em28xx_audio_analog_set(dev);
2031         if (errCode < 0) {
2032                 em28xx_errdev("%s: em28xx_audio_analog_set - errCode [%d]!\n",
2033                         __func__, errCode);
2034                 return errCode;
2035         }
2036
2037         /* configure the device */
2038         em28xx_config_i2c(dev);
2039
2040         /* set default norm */
2041         dev->norm = em28xx_video_template.current_norm;
2042
2043         maxw = norm_maxw(dev);
2044         maxh = norm_maxh(dev);
2045
2046         /* set default image size */
2047         dev->width = maxw;
2048         dev->height = maxh;
2049         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2050         dev->hscale = 0;
2051         dev->vscale = 0;
2052         dev->ctl_input = 2;
2053
2054         errCode = em28xx_config(dev);
2055         if (errCode < 0) {
2056                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2057                         __func__, errCode);
2058                 return errCode;
2059         }
2060
2061         /* init video dma queues */
2062         INIT_LIST_HEAD(&dev->vidq.active);
2063         INIT_LIST_HEAD(&dev->vidq.queued);
2064
2065
2066         if (dev->has_msp34xx) {
2067                 /* Send a reset to other chips via gpio */
2068                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2069                 if (errCode < 0) {
2070                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2071                                 __func__, errCode);
2072                         return errCode;
2073                 }
2074                 msleep(3);
2075
2076                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2077                 if (errCode < 0) {
2078                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2079                                 __func__, errCode);
2080                         return errCode;
2081                 }
2082                 msleep(3);
2083         }
2084
2085         video_mux(dev, 0);
2086
2087         mutex_lock(&em28xx_devlist_mutex);
2088         list_add_tail(&dev->devlist, &em28xx_devlist);
2089         retval = register_analog_devices(dev);
2090         if (retval < 0) {
2091                 em28xx_release_resources(dev);
2092                 mutex_unlock(&em28xx_devlist_mutex);
2093                 goto fail_reg_devices;
2094         }
2095
2096         mutex_lock(&em28xx_extension_devlist_lock);
2097         if (!list_empty(&em28xx_extension_devlist)) {
2098                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2099                         if (ops->id)
2100                                 ops->init(dev);
2101                 }
2102         }
2103         mutex_unlock(&em28xx_extension_devlist_lock);
2104         mutex_unlock(&em28xx_devlist_mutex);
2105
2106         return 0;
2107
2108 fail_unreg:
2109         em28xx_release_resources(dev);
2110 fail_reg_devices:
2111         mutex_unlock(&dev->lock);
2112         return retval;
2113 }
2114
2115 #if defined(CONFIG_MODULES) && defined(MODULE)
2116 static void request_module_async(struct work_struct *work)
2117 {
2118         struct em28xx *dev = container_of(work,
2119                              struct em28xx, request_module_wk);
2120
2121         if (dev->has_audio_class)
2122                 request_module("snd-usb-audio");
2123         else
2124                 request_module("em28xx-alsa");
2125
2126         if (dev->has_dvb)
2127                 request_module("em28xx-dvb");
2128 }
2129
2130 static void request_modules(struct em28xx *dev)
2131 {
2132         INIT_WORK(&dev->request_module_wk, request_module_async);
2133         schedule_work(&dev->request_module_wk);
2134 }
2135 #else
2136 #define request_modules(dev)
2137 #endif /* CONFIG_MODULES */
2138
2139 /*
2140  * em28xx_usb_probe()
2141  * checks for supported devices
2142  */
2143 static int em28xx_usb_probe(struct usb_interface *interface,
2144                             const struct usb_device_id *id)
2145 {
2146         const struct usb_endpoint_descriptor *endpoint;
2147         struct usb_device *udev;
2148         struct usb_interface *uif;
2149         struct em28xx *dev = NULL;
2150         int retval = -ENODEV;
2151         int i, nr, ifnum;
2152
2153         udev = usb_get_dev(interface_to_usbdev(interface));
2154         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2155
2156         /* Check to see next free device and mark as used */
2157         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2158         em28xx_devused |= 1<<nr;
2159
2160         /* Don't register audio interfaces */
2161         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2162                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2163                                 udev->descriptor.idVendor,
2164                                 udev->descriptor.idProduct,
2165                                 ifnum,
2166                                 interface->altsetting[0].desc.bInterfaceClass);
2167
2168                 em28xx_devused &= ~(1<<nr);
2169                 return -ENODEV;
2170         }
2171
2172         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2173                         udev->descriptor.idVendor,
2174                         udev->descriptor.idProduct,
2175                         ifnum,
2176                         interface->altsetting[0].desc.bInterfaceClass);
2177
2178         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2179
2180         /* check if the device has the iso in endpoint at the correct place */
2181         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2182             USB_ENDPOINT_XFER_ISOC) {
2183                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2184                 em28xx_devused &= ~(1<<nr);
2185                 return -ENODEV;
2186         }
2187         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2188                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2189                 em28xx_devused &= ~(1<<nr);
2190                 return -ENODEV;
2191         }
2192
2193         if (nr >= EM28XX_MAXBOARDS) {
2194                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2195                                 EM28XX_MAXBOARDS);
2196                 em28xx_devused &= ~(1<<nr);
2197                 return -ENOMEM;
2198         }
2199
2200         /* allocate memory for our device state and initialize it */
2201         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2202         if (dev == NULL) {
2203                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2204                 em28xx_devused &= ~(1<<nr);
2205                 return -ENOMEM;
2206         }
2207
2208         snprintf(dev->name, 29, "em28xx #%d", nr);
2209         dev->devno = nr;
2210         dev->model = id->driver_info;
2211         dev->alt   = -1;
2212
2213         /* Checks if audio is provided by some interface */
2214         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2215                 uif = udev->config->interface[i];
2216                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2217                         dev->has_audio_class = 1;
2218                         break;
2219                 }
2220         }
2221
2222         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2223                    dev->has_audio_class ? "Has" : "Doesn't have");
2224
2225         /* compute alternate max packet sizes */
2226         uif = udev->actconfig->interface[0];
2227
2228         dev->num_alt = uif->num_altsetting;
2229         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2230 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2231         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2232
2233         if (dev->alt_max_pkt_size == NULL) {
2234                 em28xx_errdev("out of memory!\n");
2235                 em28xx_devused &= ~(1<<nr);
2236                 kfree(dev);
2237                 return -ENOMEM;
2238         }
2239
2240         for (i = 0; i < dev->num_alt ; i++) {
2241                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2242                                                         wMaxPacketSize);
2243                 dev->alt_max_pkt_size[i] =
2244                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2245                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2246                                                 dev->alt_max_pkt_size[i]);
2247         }
2248
2249         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2250                 dev->model = card[nr];
2251
2252         /* allocate device struct */
2253         retval = em28xx_init_dev(&dev, udev, nr);
2254         if (retval) {
2255                 em28xx_devused &= ~(1<<dev->devno);
2256                 kfree(dev);
2257
2258                 return retval;
2259         }
2260
2261         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2262
2263         /* save our data pointer in this interface device */
2264         usb_set_intfdata(interface, dev);
2265
2266         request_modules(dev);
2267
2268         return 0;
2269 }
2270
2271 /*
2272  * em28xx_usb_disconnect()
2273  * called when the device gets diconencted
2274  * video device will be unregistered on v4l2_close in case it is still open
2275  */
2276 static void em28xx_usb_disconnect(struct usb_interface *interface)
2277 {
2278         struct em28xx *dev;
2279         struct em28xx_ops *ops = NULL;
2280
2281         dev = usb_get_intfdata(interface);
2282         usb_set_intfdata(interface, NULL);
2283
2284         if (!dev)
2285                 return;
2286
2287         em28xx_info("disconnecting %s\n", dev->vdev->name);
2288
2289         /* wait until all current v4l2 io is finished then deallocate
2290            resources */
2291         mutex_lock(&dev->lock);
2292
2293         wake_up_interruptible_all(&dev->open);
2294
2295         if (dev->users) {
2296                 em28xx_warn
2297                     ("device /dev/video%d is open! Deregistration and memory "
2298                      "deallocation are deferred on close.\n",
2299                                 dev->vdev->num);
2300
2301                 dev->state |= DEV_MISCONFIGURED;
2302                 em28xx_uninit_isoc(dev);
2303                 dev->state |= DEV_DISCONNECTED;
2304                 wake_up_interruptible(&dev->wait_frame);
2305                 wake_up_interruptible(&dev->wait_stream);
2306         } else {
2307                 dev->state |= DEV_DISCONNECTED;
2308                 em28xx_release_resources(dev);
2309         }
2310         mutex_unlock(&dev->lock);
2311
2312         mutex_lock(&em28xx_extension_devlist_lock);
2313         if (!list_empty(&em28xx_extension_devlist)) {
2314                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2315                         ops->fini(dev);
2316                 }
2317         }
2318         mutex_unlock(&em28xx_extension_devlist_lock);
2319
2320         if (!dev->users) {
2321                 kfree(dev->alt_max_pkt_size);
2322                 kfree(dev);
2323         }
2324 }
2325
2326 static struct usb_driver em28xx_usb_driver = {
2327         .name = "em28xx",
2328         .probe = em28xx_usb_probe,
2329         .disconnect = em28xx_usb_disconnect,
2330         .id_table = em28xx_id_table,
2331 };
2332
2333 static int __init em28xx_module_init(void)
2334 {
2335         int result;
2336
2337         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2338                (EM28XX_VERSION_CODE >> 16) & 0xff,
2339                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2340 #ifdef SNAPSHOT
2341         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2342                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2343 #endif
2344
2345         /* register this driver with the USB subsystem */
2346         result = usb_register(&em28xx_usb_driver);
2347         if (result)
2348                 em28xx_err(DRIVER_NAME
2349                            " usb_register failed. Error number %d.\n", result);
2350
2351         return result;
2352 }
2353
2354 static void __exit em28xx_module_exit(void)
2355 {
2356         /* deregister this driver with the USB subsystem */
2357         usb_deregister(&em28xx_usb_driver);
2358 }
2359
2360 module_init(em28xx_module_init);
2361 module_exit(em28xx_module_exit);