V4L/DVB (9607): em28xx: Properly implement poll support for IR's
[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         int zero = 0;
553
554         route.input = INPUT(dev->ctl_input)->vmux;
555         route.output = 0;
556         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, &zero);
557         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
558         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
559 }
560
561 static void video_mux(struct em28xx *dev, int index)
562 {
563         struct v4l2_routing route;
564
565         route.input = INPUT(index)->vmux;
566         route.output = 0;
567         dev->ctl_input = index;
568         dev->ctl_ainput = INPUT(index)->amux;
569
570         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
571
572         if (dev->has_msp34xx) {
573                 if (dev->i2s_speed) {
574                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
575                                 &dev->i2s_speed);
576                 }
577                 route.input = dev->ctl_ainput;
578                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
579                 /* Note: this is msp3400 specific */
580                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
581                         &route);
582         }
583
584         em28xx_audio_analog_set(dev);
585 }
586
587 /* Usage lock check functions */
588 static int res_get(struct em28xx_fh *fh)
589 {
590         struct em28xx    *dev = fh->dev;
591         int              rc   = 0;
592
593         /* This instance already has stream_on */
594         if (fh->stream_on)
595                 return rc;
596
597         if (dev->stream_on)
598                 return -EINVAL;
599
600         mutex_lock(&dev->lock);
601         dev->stream_on = 1;
602         fh->stream_on  = 1;
603         mutex_unlock(&dev->lock);
604         return rc;
605 }
606
607 static int res_check(struct em28xx_fh *fh)
608 {
609         return (fh->stream_on);
610 }
611
612 static void res_free(struct em28xx_fh *fh)
613 {
614         struct em28xx    *dev = fh->dev;
615
616         mutex_lock(&dev->lock);
617         fh->stream_on = 0;
618         dev->stream_on = 0;
619         mutex_unlock(&dev->lock);
620 }
621
622 /*
623  * em28xx_get_ctrl()
624  * return the current saturation, brightness or contrast, mute state
625  */
626 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
627 {
628         switch (ctrl->id) {
629         case V4L2_CID_AUDIO_MUTE:
630                 ctrl->value = dev->mute;
631                 return 0;
632         case V4L2_CID_AUDIO_VOLUME:
633                 ctrl->value = dev->volume;
634                 return 0;
635         default:
636                 return -EINVAL;
637         }
638 }
639
640 /*
641  * em28xx_set_ctrl()
642  * mute or set new saturation, brightness or contrast
643  */
644 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
645 {
646         switch (ctrl->id) {
647         case V4L2_CID_AUDIO_MUTE:
648                 if (ctrl->value != dev->mute) {
649                         dev->mute = ctrl->value;
650                         return em28xx_audio_analog_set(dev);
651                 }
652                 return 0;
653         case V4L2_CID_AUDIO_VOLUME:
654                 dev->volume = ctrl->value;
655                 return em28xx_audio_analog_set(dev);
656         default:
657                 return -EINVAL;
658         }
659 }
660
661 static int check_dev(struct em28xx *dev)
662 {
663         if (dev->state & DEV_DISCONNECTED) {
664                 em28xx_errdev("v4l2 ioctl: device not present\n");
665                 return -ENODEV;
666         }
667
668         if (dev->state & DEV_MISCONFIGURED) {
669                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
670                               "close and open it again\n");
671                 return -EIO;
672         }
673         return 0;
674 }
675
676 static void get_scale(struct em28xx *dev,
677                         unsigned int width, unsigned int height,
678                         unsigned int *hscale, unsigned int *vscale)
679 {
680         unsigned int          maxw   = norm_maxw(dev);
681         unsigned int          maxh   = norm_maxh(dev);
682
683         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
684         if (*hscale >= 0x4000)
685                 *hscale = 0x3fff;
686
687         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
688         if (*vscale >= 0x4000)
689                 *vscale = 0x3fff;
690 }
691
692 /* ------------------------------------------------------------------
693         IOCTL vidioc handling
694    ------------------------------------------------------------------*/
695
696 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
697                                         struct v4l2_format *f)
698 {
699         struct em28xx_fh      *fh  = priv;
700         struct em28xx         *dev = fh->dev;
701
702         mutex_lock(&dev->lock);
703
704         f->fmt.pix.width = dev->width;
705         f->fmt.pix.height = dev->height;
706         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
707         f->fmt.pix.bytesperline = dev->width * 2;
708         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
709         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
710
711         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
712         f->fmt.pix.field = dev->interlaced ?
713                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
714
715         mutex_unlock(&dev->lock);
716         return 0;
717 }
718
719 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
720                         struct v4l2_format *f)
721 {
722         struct em28xx_fh      *fh    = priv;
723         struct em28xx         *dev   = fh->dev;
724         int                   width  = f->fmt.pix.width;
725         int                   height = f->fmt.pix.height;
726         unsigned int          maxw   = norm_maxw(dev);
727         unsigned int          maxh   = norm_maxh(dev);
728         unsigned int          hscale, vscale;
729
730         /* width must even because of the YUYV format
731            height must be even because of interlacing */
732         height &= 0xfffe;
733         width &= 0xfffe;
734
735         if (height < 32)
736                 height = 32;
737         if (height > maxh)
738                 height = maxh;
739         if (width < 48)
740                 width = 48;
741         if (width > maxw)
742                 width = maxw;
743
744         mutex_lock(&dev->lock);
745
746         if (dev->is_em2800) {
747                 /* the em2800 can only scale down to 50% */
748                 if (height % (maxh / 2))
749                         height = maxh;
750                 if (width % (maxw / 2))
751                         width = maxw;
752                 /* according to empiatech support */
753                 /* the MaxPacketSize is to small to support */
754                 /* framesizes larger than 640x480 @ 30 fps */
755                 /* or 640x576 @ 25 fps. As this would cut */
756                 /* of a part of the image we prefer */
757                 /* 360x576 or 360x480 for now */
758                 if (width == maxw && height == maxh)
759                         width /= 2;
760         }
761
762         get_scale(dev, width, height, &hscale, &vscale);
763
764         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
765         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
766
767         f->fmt.pix.width = width;
768         f->fmt.pix.height = height;
769         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
770         f->fmt.pix.bytesperline = width * 2;
771         f->fmt.pix.sizeimage = width * 2 * height;
772         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
773         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
774
775         mutex_unlock(&dev->lock);
776         return 0;
777 }
778
779 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
780                         struct v4l2_format *f)
781 {
782         struct em28xx_fh      *fh  = priv;
783         struct em28xx         *dev = fh->dev;
784         int                   rc;
785
786         rc = check_dev(dev);
787         if (rc < 0)
788                 return rc;
789
790         vidioc_try_fmt_vid_cap(file, priv, f);
791
792         mutex_lock(&dev->lock);
793
794         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
795                 em28xx_errdev("%s queue busy\n", __func__);
796                 rc = -EBUSY;
797                 goto out;
798         }
799
800         if (dev->stream_on && !fh->stream_on) {
801                 em28xx_errdev("%s device in use by another fh\n", __func__);
802                 rc = -EBUSY;
803                 goto out;
804         }
805
806         /* set new image size */
807         dev->width = f->fmt.pix.width;
808         dev->height = f->fmt.pix.height;
809         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
810
811         em28xx_set_alternate(dev);
812         em28xx_resolution_set(dev);
813
814         rc = 0;
815
816 out:
817         mutex_unlock(&dev->lock);
818         return rc;
819 }
820
821 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
822 {
823         struct em28xx_fh   *fh  = priv;
824         struct em28xx      *dev = fh->dev;
825         struct v4l2_format f;
826         int                rc;
827
828         rc = check_dev(dev);
829         if (rc < 0)
830                 return rc;
831
832         mutex_lock(&dev->lock);
833         dev->norm = *norm;
834         mutex_unlock(&dev->lock);
835
836         /* Adjusts width/height, if needed */
837         f.fmt.pix.width = dev->width;
838         f.fmt.pix.height = dev->height;
839         vidioc_try_fmt_vid_cap(file, priv, &f);
840
841         mutex_lock(&dev->lock);
842
843         /* set new image size */
844         dev->width = f.fmt.pix.width;
845         dev->height = f.fmt.pix.height;
846         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
847
848         em28xx_resolution_set(dev);
849         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
850
851         mutex_unlock(&dev->lock);
852         return 0;
853 }
854
855 static const char *iname[] = {
856         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
857         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
858         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
859         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
860         [EM28XX_VMUX_SVIDEO]     = "S-Video",
861         [EM28XX_VMUX_TELEVISION] = "Television",
862         [EM28XX_VMUX_CABLE]      = "Cable TV",
863         [EM28XX_VMUX_DVB]        = "DVB",
864         [EM28XX_VMUX_DEBUG]      = "for debug only",
865 };
866
867 static int vidioc_enum_input(struct file *file, void *priv,
868                                 struct v4l2_input *i)
869 {
870         struct em28xx_fh   *fh  = priv;
871         struct em28xx      *dev = fh->dev;
872         unsigned int       n;
873
874         n = i->index;
875         if (n >= MAX_EM28XX_INPUT)
876                 return -EINVAL;
877         if (0 == INPUT(n)->type)
878                 return -EINVAL;
879
880         i->index = n;
881         i->type = V4L2_INPUT_TYPE_CAMERA;
882
883         strcpy(i->name, iname[INPUT(n)->type]);
884
885         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
886                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
887                 i->type = V4L2_INPUT_TYPE_TUNER;
888
889         i->std = dev->vdev->tvnorms;
890
891         return 0;
892 }
893
894 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
895 {
896         struct em28xx_fh   *fh  = priv;
897         struct em28xx      *dev = fh->dev;
898
899         *i = dev->ctl_input;
900
901         return 0;
902 }
903
904 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
905 {
906         struct em28xx_fh   *fh  = priv;
907         struct em28xx      *dev = fh->dev;
908         int                rc;
909
910         rc = check_dev(dev);
911         if (rc < 0)
912                 return rc;
913
914         if (i >= MAX_EM28XX_INPUT)
915                 return -EINVAL;
916         if (0 == INPUT(i)->type)
917                 return -EINVAL;
918
919         mutex_lock(&dev->lock);
920
921         video_mux(dev, i);
922
923         mutex_unlock(&dev->lock);
924         return 0;
925 }
926
927 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
928 {
929         struct em28xx_fh   *fh    = priv;
930         struct em28xx      *dev   = fh->dev;
931         unsigned int        index = a->index;
932
933         if (a->index > 1)
934                 return -EINVAL;
935
936         index = dev->ctl_ainput;
937
938         if (index == 0)
939                 strcpy(a->name, "Television");
940         else
941                 strcpy(a->name, "Line In");
942
943         a->capability = V4L2_AUDCAP_STEREO;
944         a->index = index;
945
946         return 0;
947 }
948
949 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
950 {
951         struct em28xx_fh   *fh  = priv;
952         struct em28xx      *dev = fh->dev;
953
954         if (a->index != dev->ctl_ainput)
955                 return -EINVAL;
956
957         return 0;
958 }
959
960 static int vidioc_queryctrl(struct file *file, void *priv,
961                                 struct v4l2_queryctrl *qc)
962 {
963         struct em28xx_fh      *fh  = priv;
964         struct em28xx         *dev = fh->dev;
965         int                   id  = qc->id;
966         int                   i;
967         int                   rc;
968
969         rc = check_dev(dev);
970         if (rc < 0)
971                 return rc;
972
973         memset(qc, 0, sizeof(*qc));
974
975         qc->id = id;
976
977         if (!dev->has_msp34xx) {
978                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
979                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
980                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
981                                 return 0;
982                         }
983                 }
984         }
985         mutex_lock(&dev->lock);
986         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
987         mutex_unlock(&dev->lock);
988
989         if (qc->type)
990                 return 0;
991         else
992                 return -EINVAL;
993 }
994
995 static int vidioc_g_ctrl(struct file *file, void *priv,
996                                 struct v4l2_control *ctrl)
997 {
998         struct em28xx_fh      *fh  = priv;
999         struct em28xx         *dev = fh->dev;
1000         int                   rc;
1001
1002         rc = check_dev(dev);
1003         if (rc < 0)
1004                 return rc;
1005         mutex_lock(&dev->lock);
1006
1007         if (!dev->has_msp34xx)
1008                 rc = em28xx_get_ctrl(dev, ctrl);
1009         else
1010                 rc = -EINVAL;
1011
1012         if (rc == -EINVAL) {
1013                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1014                 rc = 0;
1015         }
1016
1017         mutex_unlock(&dev->lock);
1018         return rc;
1019 }
1020
1021 static int vidioc_s_ctrl(struct file *file, void *priv,
1022                                 struct v4l2_control *ctrl)
1023 {
1024         struct em28xx_fh      *fh  = priv;
1025         struct em28xx         *dev = fh->dev;
1026         u8                    i;
1027         int                   rc;
1028
1029         rc = check_dev(dev);
1030         if (rc < 0)
1031                 return rc;
1032
1033         mutex_lock(&dev->lock);
1034
1035         if (dev->has_msp34xx)
1036                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1037         else {
1038                 rc = 1;
1039                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1040                         if (ctrl->id == em28xx_qctrl[i].id) {
1041                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1042                                     ctrl->value > em28xx_qctrl[i].maximum) {
1043                                         rc = -ERANGE;
1044                                         break;
1045                                 }
1046
1047                                 rc = em28xx_set_ctrl(dev, ctrl);
1048                                 break;
1049                         }
1050                 }
1051         }
1052
1053         /* Control not found - try to send it to the attached devices */
1054         if (rc == 1) {
1055                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1056                 rc = 0;
1057         }
1058
1059         mutex_unlock(&dev->lock);
1060         return rc;
1061 }
1062
1063 static int vidioc_g_tuner(struct file *file, void *priv,
1064                                 struct v4l2_tuner *t)
1065 {
1066         struct em28xx_fh      *fh  = priv;
1067         struct em28xx         *dev = fh->dev;
1068         int                   rc;
1069
1070         rc = check_dev(dev);
1071         if (rc < 0)
1072                 return rc;
1073
1074         if (0 != t->index)
1075                 return -EINVAL;
1076
1077         strcpy(t->name, "Tuner");
1078
1079         mutex_lock(&dev->lock);
1080
1081         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1082
1083         mutex_unlock(&dev->lock);
1084         return 0;
1085 }
1086
1087 static int vidioc_s_tuner(struct file *file, void *priv,
1088                                 struct v4l2_tuner *t)
1089 {
1090         struct em28xx_fh      *fh  = priv;
1091         struct em28xx         *dev = fh->dev;
1092         int                   rc;
1093
1094         rc = check_dev(dev);
1095         if (rc < 0)
1096                 return rc;
1097
1098         if (0 != t->index)
1099                 return -EINVAL;
1100
1101         mutex_lock(&dev->lock);
1102
1103         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1104
1105         mutex_unlock(&dev->lock);
1106         return 0;
1107 }
1108
1109 static int vidioc_g_frequency(struct file *file, void *priv,
1110                                 struct v4l2_frequency *f)
1111 {
1112         struct em28xx_fh      *fh  = priv;
1113         struct em28xx         *dev = fh->dev;
1114
1115         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1116         f->frequency = dev->ctl_freq;
1117
1118         return 0;
1119 }
1120
1121 static int vidioc_s_frequency(struct file *file, void *priv,
1122                                 struct v4l2_frequency *f)
1123 {
1124         struct em28xx_fh      *fh  = priv;
1125         struct em28xx         *dev = fh->dev;
1126         int                   rc;
1127
1128         rc = check_dev(dev);
1129         if (rc < 0)
1130                 return rc;
1131
1132         if (0 != f->tuner)
1133                 return -EINVAL;
1134
1135         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1136                 return -EINVAL;
1137         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1138                 return -EINVAL;
1139
1140         mutex_lock(&dev->lock);
1141
1142         dev->ctl_freq = f->frequency;
1143         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1144
1145         mutex_unlock(&dev->lock);
1146         return 0;
1147 }
1148
1149 #ifdef CONFIG_VIDEO_ADV_DEBUG
1150 static int em28xx_reg_len(int reg)
1151 {
1152         switch (reg) {
1153         case EM28XX_R40_AC97LSB:
1154         case EM28XX_R30_HSCALELOW:
1155         case EM28XX_R32_VSCALELOW:
1156                 return 2;
1157         default:
1158                 return 1;
1159         }
1160 }
1161
1162 static int vidioc_g_register(struct file *file, void *priv,
1163                              struct v4l2_register *reg)
1164 {
1165         struct em28xx_fh      *fh  = priv;
1166         struct em28xx         *dev = fh->dev;
1167         int ret;
1168
1169         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1170                 return -EINVAL;
1171
1172         if (em28xx_reg_len(reg->reg) == 1) {
1173                 ret = em28xx_read_reg(dev, reg->reg);
1174                 if (ret < 0)
1175                         return ret;
1176
1177                 reg->val = ret;
1178         } else {
1179                 __le64 val = 0;
1180                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1181                                                    reg->reg, (char *)&val, 2);
1182                 if (ret < 0)
1183                         return ret;
1184
1185                 reg->val = le64_to_cpu(val);
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int vidioc_s_register(struct file *file, void *priv,
1192                              struct v4l2_register *reg)
1193 {
1194         struct em28xx_fh      *fh  = priv;
1195         struct em28xx         *dev = fh->dev;
1196         __le64 buf;
1197
1198         buf = cpu_to_le64(reg->val);
1199
1200         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1201                                  em28xx_reg_len(reg->reg));
1202 }
1203 #endif
1204
1205
1206 static int vidioc_cropcap(struct file *file, void *priv,
1207                                         struct v4l2_cropcap *cc)
1208 {
1209         struct em28xx_fh      *fh  = priv;
1210         struct em28xx         *dev = fh->dev;
1211
1212         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1213                 return -EINVAL;
1214
1215         cc->bounds.left = 0;
1216         cc->bounds.top = 0;
1217         cc->bounds.width = dev->width;
1218         cc->bounds.height = dev->height;
1219         cc->defrect = cc->bounds;
1220         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1221         cc->pixelaspect.denominator = 59;
1222
1223         return 0;
1224 }
1225
1226 static int vidioc_streamon(struct file *file, void *priv,
1227                                         enum v4l2_buf_type type)
1228 {
1229         struct em28xx_fh      *fh  = priv;
1230         struct em28xx         *dev = fh->dev;
1231         int                   rc;
1232
1233         rc = check_dev(dev);
1234         if (rc < 0)
1235                 return rc;
1236
1237
1238         if (unlikely(res_get(fh) < 0))
1239                 return -EBUSY;
1240
1241         return (videobuf_streamon(&fh->vb_vidq));
1242 }
1243
1244 static int vidioc_streamoff(struct file *file, void *priv,
1245                                         enum v4l2_buf_type type)
1246 {
1247         struct em28xx_fh      *fh  = priv;
1248         struct em28xx         *dev = fh->dev;
1249         int                   rc;
1250
1251         rc = check_dev(dev);
1252         if (rc < 0)
1253                 return rc;
1254
1255         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1256                 return -EINVAL;
1257         if (type != fh->type)
1258                 return -EINVAL;
1259
1260         videobuf_streamoff(&fh->vb_vidq);
1261         res_free(fh);
1262
1263         return 0;
1264 }
1265
1266 static int vidioc_querycap(struct file *file, void  *priv,
1267                                         struct v4l2_capability *cap)
1268 {
1269         struct em28xx_fh      *fh  = priv;
1270         struct em28xx         *dev = fh->dev;
1271
1272         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1273         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1274         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1275
1276         cap->version = EM28XX_VERSION_CODE;
1277
1278         cap->capabilities =
1279                         V4L2_CAP_SLICED_VBI_CAPTURE |
1280                         V4L2_CAP_VIDEO_CAPTURE |
1281                         V4L2_CAP_AUDIO |
1282                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1283
1284         if (dev->tuner_type != TUNER_ABSENT)
1285                 cap->capabilities |= V4L2_CAP_TUNER;
1286
1287         return 0;
1288 }
1289
1290 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1291                                         struct v4l2_fmtdesc *fmtd)
1292 {
1293         if (fmtd->index != 0)
1294                 return -EINVAL;
1295
1296         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1297         strcpy(fmtd->description, "Packed YUY2");
1298         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1299         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1300
1301         return 0;
1302 }
1303
1304 /* Sliced VBI ioctls */
1305 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1306                                         struct v4l2_format *f)
1307 {
1308         struct em28xx_fh      *fh  = priv;
1309         struct em28xx         *dev = fh->dev;
1310         int                   rc;
1311
1312         rc = check_dev(dev);
1313         if (rc < 0)
1314                 return rc;
1315
1316         mutex_lock(&dev->lock);
1317
1318         f->fmt.sliced.service_set = 0;
1319
1320         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1321
1322         if (f->fmt.sliced.service_set == 0)
1323                 rc = -EINVAL;
1324
1325         mutex_unlock(&dev->lock);
1326         return rc;
1327 }
1328
1329 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1330                         struct v4l2_format *f)
1331 {
1332         struct em28xx_fh      *fh  = priv;
1333         struct em28xx         *dev = fh->dev;
1334         int                   rc;
1335
1336         rc = check_dev(dev);
1337         if (rc < 0)
1338                 return rc;
1339
1340         mutex_lock(&dev->lock);
1341         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1342         mutex_unlock(&dev->lock);
1343
1344         if (f->fmt.sliced.service_set == 0)
1345                 return -EINVAL;
1346
1347         return 0;
1348 }
1349
1350
1351 static int vidioc_reqbufs(struct file *file, void *priv,
1352                           struct v4l2_requestbuffers *rb)
1353 {
1354         struct em28xx_fh      *fh  = priv;
1355         struct em28xx         *dev = fh->dev;
1356         int                   rc;
1357
1358         rc = check_dev(dev);
1359         if (rc < 0)
1360                 return rc;
1361
1362         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1363 }
1364
1365 static int vidioc_querybuf(struct file *file, void *priv,
1366                            struct v4l2_buffer *b)
1367 {
1368         struct em28xx_fh      *fh  = priv;
1369         struct em28xx         *dev = fh->dev;
1370         int                   rc;
1371
1372         rc = check_dev(dev);
1373         if (rc < 0)
1374                 return rc;
1375
1376         return (videobuf_querybuf(&fh->vb_vidq, b));
1377 }
1378
1379 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1380 {
1381         struct em28xx_fh      *fh  = priv;
1382         struct em28xx         *dev = fh->dev;
1383         int                   rc;
1384
1385         rc = check_dev(dev);
1386         if (rc < 0)
1387                 return rc;
1388
1389         return (videobuf_qbuf(&fh->vb_vidq, b));
1390 }
1391
1392 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1393 {
1394         struct em28xx_fh      *fh  = priv;
1395         struct em28xx         *dev = fh->dev;
1396         int                   rc;
1397
1398         rc = check_dev(dev);
1399         if (rc < 0)
1400                 return rc;
1401
1402         return (videobuf_dqbuf(&fh->vb_vidq, b,
1403                                 file->f_flags & O_NONBLOCK));
1404 }
1405
1406 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1407 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1408 {
1409         struct em28xx_fh  *fh = priv;
1410
1411         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1412 }
1413 #endif
1414
1415
1416 /* ----------------------------------------------------------- */
1417 /* RADIO ESPECIFIC IOCTLS                                      */
1418 /* ----------------------------------------------------------- */
1419
1420 static int radio_querycap(struct file *file, void  *priv,
1421                           struct v4l2_capability *cap)
1422 {
1423         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1424
1425         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1426         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1427         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1428
1429         cap->version = EM28XX_VERSION_CODE;
1430         cap->capabilities = V4L2_CAP_TUNER;
1431         return 0;
1432 }
1433
1434 static int radio_g_tuner(struct file *file, void *priv,
1435                          struct v4l2_tuner *t)
1436 {
1437         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1438
1439         if (unlikely(t->index > 0))
1440                 return -EINVAL;
1441
1442         strcpy(t->name, "Radio");
1443         t->type = V4L2_TUNER_RADIO;
1444
1445         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1446         return 0;
1447 }
1448
1449 static int radio_enum_input(struct file *file, void *priv,
1450                             struct v4l2_input *i)
1451 {
1452         if (i->index != 0)
1453                 return -EINVAL;
1454         strcpy(i->name, "Radio");
1455         i->type = V4L2_INPUT_TYPE_TUNER;
1456
1457         return 0;
1458 }
1459
1460 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1461 {
1462         if (unlikely(a->index))
1463                 return -EINVAL;
1464
1465         strcpy(a->name, "Radio");
1466         return 0;
1467 }
1468
1469 static int radio_s_tuner(struct file *file, void *priv,
1470                          struct v4l2_tuner *t)
1471 {
1472         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1473
1474         if (0 != t->index)
1475                 return -EINVAL;
1476
1477         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1478
1479         return 0;
1480 }
1481
1482 static int radio_s_audio(struct file *file, void *fh,
1483                          struct v4l2_audio *a)
1484 {
1485         return 0;
1486 }
1487
1488 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1489 {
1490         return 0;
1491 }
1492
1493 static int radio_queryctrl(struct file *file, void *priv,
1494                            struct v4l2_queryctrl *qc)
1495 {
1496         int i;
1497
1498         if (qc->id <  V4L2_CID_BASE ||
1499                 qc->id >= V4L2_CID_LASTP1)
1500                 return -EINVAL;
1501
1502         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1503                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1504                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1505                         return 0;
1506                 }
1507         }
1508
1509         return -EINVAL;
1510 }
1511
1512 /*
1513  * em28xx_v4l2_open()
1514  * inits the device and starts isoc transfer
1515  */
1516 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1517 {
1518         int minor = iminor(inode);
1519         int errCode = 0, radio = 0;
1520         struct em28xx *h, *dev = NULL;
1521         struct em28xx_fh *fh;
1522         enum v4l2_buf_type fh_type = 0;
1523
1524         mutex_lock(&em28xx_devlist_mutex);
1525         list_for_each_entry(h, &em28xx_devlist, devlist) {
1526                 if (h->vdev->minor == minor) {
1527                         dev  = h;
1528                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1529                 }
1530                 if (h->vbi_dev->minor == minor) {
1531                         dev  = h;
1532                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1533                 }
1534                 if (h->radio_dev &&
1535                     h->radio_dev->minor == minor) {
1536                         radio = 1;
1537                         dev   = h;
1538                 }
1539         }
1540         mutex_unlock(&em28xx_devlist_mutex);
1541         if (NULL == dev)
1542                 return -ENODEV;
1543
1544         mutex_lock(&dev->lock);
1545
1546         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1547                                 minor, v4l2_type_names[fh_type], dev->users);
1548
1549
1550         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1551         if (!fh) {
1552                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1553                 mutex_unlock(&dev->lock);
1554                 return -ENOMEM;
1555         }
1556         fh->dev = dev;
1557         fh->radio = radio;
1558         fh->type = fh_type;
1559         filp->private_data = fh;
1560
1561         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1562                 dev->width = norm_maxw(dev);
1563                 dev->height = norm_maxh(dev);
1564                 dev->hscale = 0;
1565                 dev->vscale = 0;
1566
1567                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1568                 em28xx_set_alternate(dev);
1569                 em28xx_resolution_set(dev);
1570
1571                 /* Needed, since GPIO might have disabled power of
1572                    some i2c device
1573                  */
1574                 em28xx_config_i2c(dev);
1575
1576         }
1577         if (fh->radio) {
1578                 em28xx_videodbg("video_open: setting radio device\n");
1579                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1580         }
1581
1582         dev->users++;
1583
1584         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1585                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1586                         sizeof(struct em28xx_buffer), fh);
1587
1588         mutex_unlock(&dev->lock);
1589
1590         return errCode;
1591 }
1592
1593 /*
1594  * em28xx_realease_resources()
1595  * unregisters the v4l2,i2c and usb devices
1596  * called when the device gets disconected or at module unload
1597 */
1598 static void em28xx_release_resources(struct em28xx *dev)
1599 {
1600
1601         /*FIXME: I2C IR should be disconnected */
1602
1603         list_del(&dev->devlist);
1604         if (dev->sbutton_input_dev)
1605                 em28xx_deregister_snapshot_button(dev);
1606
1607         if (dev->ir)
1608                 em28xx_ir_fini(dev);
1609
1610         if (dev->radio_dev) {
1611                 if (-1 != dev->radio_dev->minor)
1612                         video_unregister_device(dev->radio_dev);
1613                 else
1614                         video_device_release(dev->radio_dev);
1615                 dev->radio_dev = NULL;
1616         }
1617         if (dev->vbi_dev) {
1618                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1619                             dev->vbi_dev->num);
1620                 if (-1 != dev->vbi_dev->minor)
1621                         video_unregister_device(dev->vbi_dev);
1622                 else
1623                         video_device_release(dev->vbi_dev);
1624                 dev->vbi_dev = NULL;
1625         }
1626         if (dev->vdev) {
1627                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1628                             dev->vdev->num);
1629                 if (-1 != dev->vdev->minor)
1630                         video_unregister_device(dev->vdev);
1631                 else
1632                         video_device_release(dev->vdev);
1633                 dev->vdev = NULL;
1634         }
1635         em28xx_i2c_unregister(dev);
1636         usb_put_dev(dev->udev);
1637
1638         /* Mark device as unused */
1639         em28xx_devused &= ~(1<<dev->devno);
1640 }
1641
1642 /*
1643  * em28xx_v4l2_close()
1644  * stops streaming and deallocates all resources allocated by the v4l2
1645  * calls and ioctls
1646  */
1647 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1648 {
1649         struct em28xx_fh *fh  = filp->private_data;
1650         struct em28xx    *dev = fh->dev;
1651         int              errCode;
1652
1653         em28xx_videodbg("users=%d\n", dev->users);
1654
1655
1656         if (res_check(fh))
1657                 res_free(fh);
1658
1659         mutex_lock(&dev->lock);
1660
1661         if (dev->users == 1) {
1662                 videobuf_stop(&fh->vb_vidq);
1663                 videobuf_mmap_free(&fh->vb_vidq);
1664
1665                 /* the device is already disconnect,
1666                    free the remaining resources */
1667                 if (dev->state & DEV_DISCONNECTED) {
1668                         em28xx_release_resources(dev);
1669                         mutex_unlock(&dev->lock);
1670                         kfree(dev);
1671                         return 0;
1672                 }
1673
1674                 /* do this before setting alternate! */
1675                 em28xx_uninit_isoc(dev);
1676                 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1677
1678                 /* set alternate 0 */
1679                 dev->alt = 0;
1680                 em28xx_videodbg("setting alternate 0\n");
1681                 errCode = usb_set_interface(dev->udev, 0, 0);
1682                 if (errCode < 0) {
1683                         em28xx_errdev("cannot change alternate number to "
1684                                         "0 (error=%i)\n", errCode);
1685                 }
1686         }
1687         kfree(fh);
1688         dev->users--;
1689         wake_up_interruptible_nr(&dev->open, 1);
1690         mutex_unlock(&dev->lock);
1691         return 0;
1692 }
1693
1694 /*
1695  * em28xx_v4l2_read()
1696  * will allocate buffers when called for the first time
1697  */
1698 static ssize_t
1699 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1700                  loff_t *pos)
1701 {
1702         struct em28xx_fh *fh = filp->private_data;
1703         struct em28xx *dev = fh->dev;
1704         int rc;
1705
1706         rc = check_dev(dev);
1707         if (rc < 0)
1708                 return rc;
1709
1710         /* FIXME: read() is not prepared to allow changing the video
1711            resolution while streaming. Seems a bug at em28xx_set_fmt
1712          */
1713
1714         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1715                 if (unlikely(res_get(fh)))
1716                         return -EBUSY;
1717
1718                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1719                                         filp->f_flags & O_NONBLOCK);
1720         }
1721         return 0;
1722 }
1723
1724 /*
1725  * em28xx_v4l2_poll()
1726  * will allocate buffers when called for the first time
1727  */
1728 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1729 {
1730         struct em28xx_fh *fh = filp->private_data;
1731         struct em28xx *dev = fh->dev;
1732         int rc;
1733
1734         rc = check_dev(dev);
1735         if (rc < 0)
1736                 return rc;
1737
1738         if (unlikely(res_get(fh) < 0))
1739                 return POLLERR;
1740
1741         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1742                 return POLLERR;
1743
1744         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1745 }
1746
1747 /*
1748  * em28xx_v4l2_mmap()
1749  */
1750 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1751 {
1752         struct em28xx_fh *fh    = filp->private_data;
1753         struct em28xx    *dev   = fh->dev;
1754         int              rc;
1755
1756         if (unlikely(res_get(fh) < 0))
1757                 return -EBUSY;
1758
1759         rc = check_dev(dev);
1760         if (rc < 0)
1761                 return rc;
1762
1763         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1764
1765         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1766                 (unsigned long)vma->vm_start,
1767                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1768                 rc);
1769
1770         return rc;
1771 }
1772
1773 static const struct file_operations em28xx_v4l_fops = {
1774         .owner         = THIS_MODULE,
1775         .open          = em28xx_v4l2_open,
1776         .release       = em28xx_v4l2_close,
1777         .read          = em28xx_v4l2_read,
1778         .poll          = em28xx_v4l2_poll,
1779         .mmap          = em28xx_v4l2_mmap,
1780         .ioctl         = video_ioctl2,
1781         .llseek        = no_llseek,
1782         .compat_ioctl  = v4l_compat_ioctl32,
1783 };
1784
1785 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1786         .vidioc_querycap            = vidioc_querycap,
1787         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1788         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1789         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1790         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1791         .vidioc_g_audio             = vidioc_g_audio,
1792         .vidioc_s_audio             = vidioc_s_audio,
1793         .vidioc_cropcap             = vidioc_cropcap,
1794
1795         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1796         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1797         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1798
1799         .vidioc_reqbufs             = vidioc_reqbufs,
1800         .vidioc_querybuf            = vidioc_querybuf,
1801         .vidioc_qbuf                = vidioc_qbuf,
1802         .vidioc_dqbuf               = vidioc_dqbuf,
1803         .vidioc_s_std               = vidioc_s_std,
1804         .vidioc_enum_input          = vidioc_enum_input,
1805         .vidioc_g_input             = vidioc_g_input,
1806         .vidioc_s_input             = vidioc_s_input,
1807         .vidioc_queryctrl           = vidioc_queryctrl,
1808         .vidioc_g_ctrl              = vidioc_g_ctrl,
1809         .vidioc_s_ctrl              = vidioc_s_ctrl,
1810         .vidioc_streamon            = vidioc_streamon,
1811         .vidioc_streamoff           = vidioc_streamoff,
1812         .vidioc_g_tuner             = vidioc_g_tuner,
1813         .vidioc_s_tuner             = vidioc_s_tuner,
1814         .vidioc_g_frequency         = vidioc_g_frequency,
1815         .vidioc_s_frequency         = vidioc_s_frequency,
1816 #ifdef CONFIG_VIDEO_ADV_DEBUG
1817         .vidioc_g_register          = vidioc_g_register,
1818         .vidioc_s_register          = vidioc_s_register,
1819 #endif
1820 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1821         .vidiocgmbuf                = vidiocgmbuf,
1822 #endif
1823 };
1824
1825 static const struct video_device em28xx_video_template = {
1826         .fops                       = &em28xx_v4l_fops,
1827         .release                    = video_device_release,
1828         .ioctl_ops                  = &video_ioctl_ops,
1829
1830         .minor                      = -1,
1831
1832         .tvnorms                    = V4L2_STD_ALL,
1833         .current_norm               = V4L2_STD_PAL,
1834 };
1835
1836 static const struct file_operations radio_fops = {
1837         .owner         = THIS_MODULE,
1838         .open          = em28xx_v4l2_open,
1839         .release       = em28xx_v4l2_close,
1840         .ioctl         = video_ioctl2,
1841         .compat_ioctl  = v4l_compat_ioctl32,
1842         .llseek        = no_llseek,
1843 };
1844
1845 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1846         .vidioc_querycap      = radio_querycap,
1847         .vidioc_g_tuner       = radio_g_tuner,
1848         .vidioc_enum_input    = radio_enum_input,
1849         .vidioc_g_audio       = radio_g_audio,
1850         .vidioc_s_tuner       = radio_s_tuner,
1851         .vidioc_s_audio       = radio_s_audio,
1852         .vidioc_s_input       = radio_s_input,
1853         .vidioc_queryctrl     = radio_queryctrl,
1854         .vidioc_g_ctrl        = vidioc_g_ctrl,
1855         .vidioc_s_ctrl        = vidioc_s_ctrl,
1856         .vidioc_g_frequency   = vidioc_g_frequency,
1857         .vidioc_s_frequency   = vidioc_s_frequency,
1858 #ifdef CONFIG_VIDEO_ADV_DEBUG
1859         .vidioc_g_register    = vidioc_g_register,
1860         .vidioc_s_register    = vidioc_s_register,
1861 #endif
1862 };
1863
1864 static struct video_device em28xx_radio_template = {
1865         .name                 = "em28xx-radio",
1866         .fops                 = &radio_fops,
1867         .ioctl_ops            = &radio_ioctl_ops,
1868         .minor                = -1,
1869 };
1870
1871 /******************************** usb interface ******************************/
1872
1873
1874 static LIST_HEAD(em28xx_extension_devlist);
1875 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1876
1877 int em28xx_register_extension(struct em28xx_ops *ops)
1878 {
1879         struct em28xx *dev = NULL;
1880
1881         mutex_lock(&em28xx_devlist_mutex);
1882         mutex_lock(&em28xx_extension_devlist_lock);
1883         list_add_tail(&ops->next, &em28xx_extension_devlist);
1884         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1885                 if (dev)
1886                         ops->init(dev);
1887         }
1888         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1889         mutex_unlock(&em28xx_extension_devlist_lock);
1890         mutex_unlock(&em28xx_devlist_mutex);
1891         return 0;
1892 }
1893 EXPORT_SYMBOL(em28xx_register_extension);
1894
1895 void em28xx_unregister_extension(struct em28xx_ops *ops)
1896 {
1897         struct em28xx *dev = NULL;
1898
1899         mutex_lock(&em28xx_devlist_mutex);
1900         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1901                 if (dev)
1902                         ops->fini(dev);
1903         }
1904
1905         mutex_lock(&em28xx_extension_devlist_lock);
1906         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1907         list_del(&ops->next);
1908         mutex_unlock(&em28xx_extension_devlist_lock);
1909         mutex_unlock(&em28xx_devlist_mutex);
1910 }
1911 EXPORT_SYMBOL(em28xx_unregister_extension);
1912
1913 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1914                                              const struct video_device *template,
1915                                              const char *type_name)
1916 {
1917         struct video_device *vfd;
1918
1919         vfd = video_device_alloc();
1920         if (NULL == vfd)
1921                 return NULL;
1922         *vfd = *template;
1923         vfd->minor   = -1;
1924         vfd->parent = &dev->udev->dev;
1925         vfd->release = video_device_release;
1926         vfd->debug = video_debug;
1927
1928         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1929                  dev->name, type_name);
1930
1931         return vfd;
1932 }
1933
1934 int em28xx_supports_audio_extension(struct em28xx *dev)
1935 {
1936         /* The chip dictates whether we support the Empia analog audio
1937            extension */
1938         switch (dev->chip_id) {
1939         case CHIP_ID_EM2874:
1940                 /* Either a digital-only device or provides AC97 audio */
1941                 return 0;
1942         case CHIP_ID_EM2883:
1943         default:
1944                 return 1;
1945         }
1946 }
1947
1948 static int register_analog_devices(struct em28xx *dev)
1949 {
1950         int ret;
1951
1952         /* allocate and fill video video_device struct */
1953         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1954         if (!dev->vdev) {
1955                 em28xx_errdev("cannot allocate video_device.\n");
1956                 return -ENODEV;
1957         }
1958
1959         /* register v4l2 video video_device */
1960         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1961                                        video_nr[dev->devno]);
1962         if (ret) {
1963                 em28xx_errdev("unable to register video device (error=%i).\n",
1964                               ret);
1965                 return ret;
1966         }
1967
1968         /* Allocate and fill vbi video_device struct */
1969         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1970
1971         /* register v4l2 vbi video_device */
1972         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1973                                         vbi_nr[dev->devno]);
1974         if (ret < 0) {
1975                 em28xx_errdev("unable to register vbi device\n");
1976                 return ret;
1977         }
1978
1979         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1980                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
1981                 if (!dev->radio_dev) {
1982                         em28xx_errdev("cannot allocate video_device.\n");
1983                         return -ENODEV;
1984                 }
1985                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1986                                             radio_nr[dev->devno]);
1987                 if (ret < 0) {
1988                         em28xx_errdev("can't register radio device\n");
1989                         return ret;
1990                 }
1991                 em28xx_info("Registered radio device as /dev/radio%d\n",
1992                             dev->radio_dev->num);
1993         }
1994
1995         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1996                                 dev->vdev->num, dev->vbi_dev->num);
1997
1998         return 0;
1999 }
2000
2001
2002 /*
2003  * em28xx_init_dev()
2004  * allocates and inits the device structs, registers i2c bus and v4l device
2005  */
2006 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2007                            int minor)
2008 {
2009         struct em28xx_ops *ops = NULL;
2010         struct em28xx *dev = *devhandle;
2011         int retval = -ENOMEM;
2012         int errCode;
2013         unsigned int maxh, maxw;
2014
2015         dev->udev = udev;
2016         mutex_init(&dev->lock);
2017         mutex_init(&dev->ctrl_urb_lock);
2018         spin_lock_init(&dev->slock);
2019         init_waitqueue_head(&dev->open);
2020         init_waitqueue_head(&dev->wait_frame);
2021         init_waitqueue_head(&dev->wait_stream);
2022
2023         dev->em28xx_write_regs = em28xx_write_regs;
2024         dev->em28xx_read_reg = em28xx_read_reg;
2025         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2026         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2027         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2028         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2029
2030         em28xx_pre_card_setup(dev);
2031
2032         errCode = em28xx_config(dev);
2033         if (errCode) {
2034                 em28xx_errdev("error configuring device\n");
2035                 return -ENOMEM;
2036         }
2037
2038         /* register i2c bus */
2039         errCode = em28xx_i2c_register(dev);
2040         if (errCode < 0) {
2041                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2042                         __func__, errCode);
2043                 return errCode;
2044         }
2045
2046         /* Do board specific init and eeprom reading */
2047         em28xx_card_setup(dev);
2048
2049         /* Configure audio */
2050         errCode = em28xx_audio_analog_set(dev);
2051         if (errCode < 0) {
2052                 em28xx_errdev("%s: em28xx_audio_analog_set - errCode [%d]!\n",
2053                         __func__, errCode);
2054                 return errCode;
2055         }
2056
2057         /* configure the device */
2058         em28xx_config_i2c(dev);
2059
2060         /* set default norm */
2061         dev->norm = em28xx_video_template.current_norm;
2062
2063         maxw = norm_maxw(dev);
2064         maxh = norm_maxh(dev);
2065
2066         /* set default image size */
2067         dev->width = maxw;
2068         dev->height = maxh;
2069         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2070         dev->hscale = 0;
2071         dev->vscale = 0;
2072         dev->ctl_input = 2;
2073
2074         errCode = em28xx_config(dev);
2075         if (errCode < 0) {
2076                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2077                         __func__, errCode);
2078                 return errCode;
2079         }
2080
2081         /* init video dma queues */
2082         INIT_LIST_HEAD(&dev->vidq.active);
2083         INIT_LIST_HEAD(&dev->vidq.queued);
2084
2085
2086         if (dev->has_msp34xx) {
2087                 /* Send a reset to other chips via gpio */
2088                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2089                 if (errCode < 0) {
2090                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2091                                 __func__, errCode);
2092                         return errCode;
2093                 }
2094                 msleep(3);
2095
2096                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2097                 if (errCode < 0) {
2098                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2099                                 __func__, errCode);
2100                         return errCode;
2101                 }
2102                 msleep(3);
2103         }
2104
2105         video_mux(dev, 0);
2106
2107         mutex_lock(&em28xx_devlist_mutex);
2108         list_add_tail(&dev->devlist, &em28xx_devlist);
2109         retval = register_analog_devices(dev);
2110         if (retval < 0) {
2111                 em28xx_release_resources(dev);
2112                 mutex_unlock(&em28xx_devlist_mutex);
2113                 goto fail_reg_devices;
2114         }
2115
2116         mutex_lock(&em28xx_extension_devlist_lock);
2117         if (!list_empty(&em28xx_extension_devlist)) {
2118                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2119                         if (ops->id)
2120                                 ops->init(dev);
2121                 }
2122         }
2123         mutex_unlock(&em28xx_extension_devlist_lock);
2124         mutex_unlock(&em28xx_devlist_mutex);
2125
2126         return 0;
2127
2128 fail_reg_devices:
2129         mutex_unlock(&dev->lock);
2130         return retval;
2131 }
2132
2133 #if defined(CONFIG_MODULES) && defined(MODULE)
2134 static void request_module_async(struct work_struct *work)
2135 {
2136         struct em28xx *dev = container_of(work,
2137                              struct em28xx, request_module_wk);
2138
2139         if (dev->has_audio_class)
2140                 request_module("snd-usb-audio");
2141         else if (dev->has_alsa_audio)
2142                 request_module("em28xx-alsa");
2143
2144         if (dev->has_dvb)
2145                 request_module("em28xx-dvb");
2146 }
2147
2148 static void request_modules(struct em28xx *dev)
2149 {
2150         INIT_WORK(&dev->request_module_wk, request_module_async);
2151         schedule_work(&dev->request_module_wk);
2152 }
2153 #else
2154 #define request_modules(dev)
2155 #endif /* CONFIG_MODULES */
2156
2157 /*
2158  * em28xx_usb_probe()
2159  * checks for supported devices
2160  */
2161 static int em28xx_usb_probe(struct usb_interface *interface,
2162                             const struct usb_device_id *id)
2163 {
2164         const struct usb_endpoint_descriptor *endpoint;
2165         struct usb_device *udev;
2166         struct usb_interface *uif;
2167         struct em28xx *dev = NULL;
2168         int retval = -ENODEV;
2169         int i, nr, ifnum, isoc_pipe;
2170
2171         udev = usb_get_dev(interface_to_usbdev(interface));
2172         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2173
2174         /* Check to see next free device and mark as used */
2175         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2176         em28xx_devused |= 1<<nr;
2177
2178         /* Don't register audio interfaces */
2179         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2180                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2181                                 udev->descriptor.idVendor,
2182                                 udev->descriptor.idProduct,
2183                                 ifnum,
2184                                 interface->altsetting[0].desc.bInterfaceClass);
2185
2186                 em28xx_devused &= ~(1<<nr);
2187                 return -ENODEV;
2188         }
2189
2190         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2191                         udev->descriptor.idVendor,
2192                         udev->descriptor.idProduct,
2193                         ifnum,
2194                         interface->altsetting[0].desc.bInterfaceClass);
2195
2196         endpoint = &interface->cur_altsetting->endpoint[0].desc;
2197
2198         /* check if the device has the iso in endpoint at the correct place */
2199         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
2200             USB_ENDPOINT_XFER_ISOC &&
2201             (interface->altsetting[1].endpoint[0].desc.wMaxPacketSize == 940))
2202         {
2203                 /* It's a newer em2874/em2875 device */
2204                 isoc_pipe = 0;
2205         } else {
2206                 isoc_pipe = 1;
2207                 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2208                 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2209                     USB_ENDPOINT_XFER_ISOC) {
2210                         em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2211                         em28xx_devused &= ~(1<<nr);
2212                         return -ENODEV;
2213                 }
2214                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2215                         em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2216                         em28xx_devused &= ~(1<<nr);
2217                         return -ENODEV;
2218                 }
2219         }
2220
2221         if (nr >= EM28XX_MAXBOARDS) {
2222                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2223                                 EM28XX_MAXBOARDS);
2224                 em28xx_devused &= ~(1<<nr);
2225                 return -ENOMEM;
2226         }
2227
2228         /* allocate memory for our device state and initialize it */
2229         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2230         if (dev == NULL) {
2231                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2232                 em28xx_devused &= ~(1<<nr);
2233                 return -ENOMEM;
2234         }
2235
2236         snprintf(dev->name, 29, "em28xx #%d", nr);
2237         dev->devno = nr;
2238         dev->model = id->driver_info;
2239         dev->alt   = -1;
2240
2241         /* Checks if audio is provided by some interface */
2242         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2243                 uif = udev->config->interface[i];
2244                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2245                         dev->has_audio_class = 1;
2246                         break;
2247                 }
2248         }
2249
2250         /* compute alternate max packet sizes */
2251         uif = udev->actconfig->interface[0];
2252
2253         dev->num_alt = uif->num_altsetting;
2254         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2255 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2256         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2257
2258         if (dev->alt_max_pkt_size == NULL) {
2259                 em28xx_errdev("out of memory!\n");
2260                 em28xx_devused &= ~(1<<nr);
2261                 kfree(dev);
2262                 return -ENOMEM;
2263         }
2264
2265         for (i = 0; i < dev->num_alt ; i++) {
2266                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
2267                                                         wMaxPacketSize);
2268                 dev->alt_max_pkt_size[i] =
2269                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2270                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2271                                                 dev->alt_max_pkt_size[i]);
2272         }
2273
2274         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2275                 dev->model = card[nr];
2276
2277         /* allocate device struct */
2278         retval = em28xx_init_dev(&dev, udev, nr);
2279         if (retval) {
2280                 em28xx_devused &= ~(1<<dev->devno);
2281                 kfree(dev);
2282
2283                 return retval;
2284         }
2285
2286         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2287
2288         if (dev->has_audio_class == 0) {
2289                 /* We don't have a USB audio class, let's see if we support
2290                    ALSA Audio */
2291                 dev->has_alsa_audio = em28xx_supports_audio_extension(dev);
2292                 if (dev->has_alsa_audio)
2293                         printk(KERN_INFO DRIVER_NAME " supports alsa audio\n");
2294         } else {
2295                 printk(KERN_INFO DRIVER_NAME " has usb audio class\n");
2296         }
2297
2298
2299         /* save our data pointer in this interface device */
2300         usb_set_intfdata(interface, dev);
2301
2302         request_modules(dev);
2303
2304         return 0;
2305 }
2306
2307 /*
2308  * em28xx_usb_disconnect()
2309  * called when the device gets diconencted
2310  * video device will be unregistered on v4l2_close in case it is still open
2311  */
2312 static void em28xx_usb_disconnect(struct usb_interface *interface)
2313 {
2314         struct em28xx *dev;
2315         struct em28xx_ops *ops = NULL;
2316
2317         dev = usb_get_intfdata(interface);
2318         usb_set_intfdata(interface, NULL);
2319
2320         if (!dev)
2321                 return;
2322
2323         em28xx_info("disconnecting %s\n", dev->vdev->name);
2324
2325         /* wait until all current v4l2 io is finished then deallocate
2326            resources */
2327         mutex_lock(&dev->lock);
2328
2329         wake_up_interruptible_all(&dev->open);
2330
2331         if (dev->users) {
2332                 em28xx_warn
2333                     ("device /dev/video%d is open! Deregistration and memory "
2334                      "deallocation are deferred on close.\n",
2335                                 dev->vdev->num);
2336
2337                 dev->state |= DEV_MISCONFIGURED;
2338                 em28xx_uninit_isoc(dev);
2339                 dev->state |= DEV_DISCONNECTED;
2340                 wake_up_interruptible(&dev->wait_frame);
2341                 wake_up_interruptible(&dev->wait_stream);
2342         } else {
2343                 dev->state |= DEV_DISCONNECTED;
2344                 em28xx_release_resources(dev);
2345         }
2346         mutex_unlock(&dev->lock);
2347
2348         mutex_lock(&em28xx_extension_devlist_lock);
2349         if (!list_empty(&em28xx_extension_devlist)) {
2350                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2351                         ops->fini(dev);
2352                 }
2353         }
2354         mutex_unlock(&em28xx_extension_devlist_lock);
2355
2356         if (!dev->users) {
2357                 kfree(dev->alt_max_pkt_size);
2358                 kfree(dev);
2359         }
2360 }
2361
2362 static struct usb_driver em28xx_usb_driver = {
2363         .name = "em28xx",
2364         .probe = em28xx_usb_probe,
2365         .disconnect = em28xx_usb_disconnect,
2366         .id_table = em28xx_id_table,
2367 };
2368
2369 static int __init em28xx_module_init(void)
2370 {
2371         int result;
2372
2373         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2374                (EM28XX_VERSION_CODE >> 16) & 0xff,
2375                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2376 #ifdef SNAPSHOT
2377         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2378                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2379 #endif
2380
2381         /* register this driver with the USB subsystem */
2382         result = usb_register(&em28xx_usb_driver);
2383         if (result)
2384                 em28xx_err(DRIVER_NAME
2385                            " usb_register failed. Error number %d.\n", result);
2386
2387         return result;
2388 }
2389
2390 static void __exit em28xx_module_exit(void)
2391 {
2392         /* deregister this driver with the USB subsystem */
2393         usb_deregister(&em28xx_usb_driver);
2394 }
2395
2396 module_init(em28xx_module_init);
2397 module_exit(em28xx_module_exit);