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