V4L/DVB (11380): v4l2-subdev: change s_routing prototype
[linux-3.10.git] / drivers / media / video / au0828 / au0828-video.c
1 /*
2  * Auvitek AU0828 USB Bridge (Analog video support)
3  *
4  * Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
5  * Copyright (C) 2005-2008 Auvitek International, Ltd.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * As published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20  * 02110-1301, USA.
21  */
22
23 /* Developer Notes:
24  *
25  * VBI support is not yet working
26  * The hardware scaler supported is unimplemented
27  * AC97 audio support is unimplemented (only i2s audio mode)
28  *
29  */
30
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/device.h>
34 #include <linux/suspend.h>
35 #include <linux/version.h>
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-ioctl.h>
38 #include <media/v4l2-chip-ident.h>
39 #include <media/tuner.h>
40 #include "au0828.h"
41 #include "au0828-reg.h"
42
43 static LIST_HEAD(au0828_devlist);
44 static DEFINE_MUTEX(au0828_sysfs_lock);
45
46 #define AU0828_VERSION_CODE KERNEL_VERSION(0, 0, 1)
47
48 /* ------------------------------------------------------------------
49         Videobuf operations
50    ------------------------------------------------------------------*/
51
52 static unsigned int isoc_debug;
53 module_param(isoc_debug, int, 0644);
54 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
55
56 #define au0828_isocdbg(fmt, arg...) \
57 do {\
58         if (isoc_debug) { \
59                 printk(KERN_INFO "au0828 %s :"fmt, \
60                        __func__ , ##arg);          \
61         } \
62   } while (0)
63
64 static inline void print_err_status(struct au0828_dev *dev,
65                                     int packet, int status)
66 {
67         char *errmsg = "Unknown";
68
69         switch (status) {
70         case -ENOENT:
71                 errmsg = "unlinked synchronuously";
72                 break;
73         case -ECONNRESET:
74                 errmsg = "unlinked asynchronuously";
75                 break;
76         case -ENOSR:
77                 errmsg = "Buffer error (overrun)";
78                 break;
79         case -EPIPE:
80                 errmsg = "Stalled (device not responding)";
81                 break;
82         case -EOVERFLOW:
83                 errmsg = "Babble (bad cable?)";
84                 break;
85         case -EPROTO:
86                 errmsg = "Bit-stuff error (bad cable?)";
87                 break;
88         case -EILSEQ:
89                 errmsg = "CRC/Timeout (could be anything)";
90                 break;
91         case -ETIME:
92                 errmsg = "Device does not respond";
93                 break;
94         }
95         if (packet < 0) {
96                 au0828_isocdbg("URB status %d [%s].\n", status, errmsg);
97         } else {
98                 au0828_isocdbg("URB packet %d, status %d [%s].\n",
99                                packet, status, errmsg);
100         }
101 }
102
103 static int check_dev(struct au0828_dev *dev)
104 {
105         if (dev->dev_state & DEV_DISCONNECTED) {
106                 printk(KERN_INFO "v4l2 ioctl: device not present\n");
107                 return -ENODEV;
108         }
109
110         if (dev->dev_state & DEV_MISCONFIGURED) {
111                 printk(KERN_INFO "v4l2 ioctl: device is misconfigured; "
112                        "close and open it again\n");
113                 return -EIO;
114         }
115         return 0;
116 }
117
118 /*
119  * IRQ callback, called by URB callback
120  */
121 static void au0828_irq_callback(struct urb *urb)
122 {
123         struct au0828_dmaqueue  *dma_q = urb->context;
124         struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
125         int rc, i;
126
127         switch (urb->status) {
128         case 0:             /* success */
129         case -ETIMEDOUT:    /* NAK */
130                 break;
131         case -ECONNRESET:   /* kill */
132         case -ENOENT:
133         case -ESHUTDOWN:
134                 au0828_isocdbg("au0828_irq_callback called: status kill\n");
135                 return;
136         default:            /* unknown error */
137                 au0828_isocdbg("urb completition error %d.\n", urb->status);
138                 break;
139         }
140
141         /* Copy data from URB */
142         spin_lock(&dev->slock);
143         rc = dev->isoc_ctl.isoc_copy(dev, urb);
144         spin_unlock(&dev->slock);
145
146         /* Reset urb buffers */
147         for (i = 0; i < urb->number_of_packets; i++) {
148                 urb->iso_frame_desc[i].status = 0;
149                 urb->iso_frame_desc[i].actual_length = 0;
150         }
151         urb->status = 0;
152
153         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
154         if (urb->status) {
155                 au0828_isocdbg("urb resubmit failed (error=%i)\n",
156                                urb->status);
157         }
158 }
159
160 /*
161  * Stop and Deallocate URBs
162  */
163 void au0828_uninit_isoc(struct au0828_dev *dev)
164 {
165         struct urb *urb;
166         int i;
167
168         au0828_isocdbg("au0828: called au0828_uninit_isoc\n");
169
170         dev->isoc_ctl.nfields = -1;
171         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
172                 urb = dev->isoc_ctl.urb[i];
173                 if (urb) {
174                         if (!irqs_disabled())
175                                 usb_kill_urb(urb);
176                         else
177                                 usb_unlink_urb(urb);
178
179                         if (dev->isoc_ctl.transfer_buffer[i]) {
180                                 usb_buffer_free(dev->usbdev,
181                                         urb->transfer_buffer_length,
182                                         dev->isoc_ctl.transfer_buffer[i],
183                                         urb->transfer_dma);
184                         }
185                         usb_free_urb(urb);
186                         dev->isoc_ctl.urb[i] = NULL;
187                 }
188                 dev->isoc_ctl.transfer_buffer[i] = NULL;
189         }
190
191         kfree(dev->isoc_ctl.urb);
192         kfree(dev->isoc_ctl.transfer_buffer);
193
194         dev->isoc_ctl.urb = NULL;
195         dev->isoc_ctl.transfer_buffer = NULL;
196         dev->isoc_ctl.num_bufs = 0;
197 }
198
199 /*
200  * Allocate URBs and start IRQ
201  */
202 int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
203                      int num_bufs, int max_pkt_size,
204                      int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
205 {
206         struct au0828_dmaqueue *dma_q = &dev->vidq;
207         int i;
208         int sb_size, pipe;
209         struct urb *urb;
210         int j, k;
211         int rc;
212
213         au0828_isocdbg("au0828: called au0828_prepare_isoc\n");
214
215         /* De-allocates all pending stuff */
216         au0828_uninit_isoc(dev);
217
218         dev->isoc_ctl.isoc_copy = isoc_copy;
219         dev->isoc_ctl.num_bufs = num_bufs;
220
221         dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs,  GFP_KERNEL);
222         if (!dev->isoc_ctl.urb) {
223                 au0828_isocdbg("cannot alloc memory for usb buffers\n");
224                 return -ENOMEM;
225         }
226
227         dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
228                                               GFP_KERNEL);
229         if (!dev->isoc_ctl.transfer_buffer) {
230                 au0828_isocdbg("cannot allocate memory for usb transfer\n");
231                 kfree(dev->isoc_ctl.urb);
232                 return -ENOMEM;
233         }
234
235         dev->isoc_ctl.max_pkt_size = max_pkt_size;
236         dev->isoc_ctl.buf = NULL;
237
238         sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
239
240         /* allocate urbs and transfer buffers */
241         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
242                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
243                 if (!urb) {
244                         au0828_isocdbg("cannot alloc isoc_ctl.urb %i\n", i);
245                         au0828_uninit_isoc(dev);
246                         return -ENOMEM;
247                 }
248                 dev->isoc_ctl.urb[i] = urb;
249
250                 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->usbdev,
251                         sb_size, GFP_KERNEL, &urb->transfer_dma);
252                 if (!dev->isoc_ctl.transfer_buffer[i]) {
253                         printk("unable to allocate %i bytes for transfer"
254                                         " buffer %i%s\n",
255                                         sb_size, i,
256                                         in_interrupt() ? " while in int" : "");
257                         au0828_uninit_isoc(dev);
258                         return -ENOMEM;
259                 }
260                 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
261
262                 pipe = usb_rcvisocpipe(dev->usbdev,
263                                        dev->isoc_in_endpointaddr),
264
265                 usb_fill_int_urb(urb, dev->usbdev, pipe,
266                                  dev->isoc_ctl.transfer_buffer[i], sb_size,
267                                  au0828_irq_callback, dma_q, 1);
268
269                 urb->number_of_packets = max_packets;
270                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
271
272                 k = 0;
273                 for (j = 0; j < max_packets; j++) {
274                         urb->iso_frame_desc[j].offset = k;
275                         urb->iso_frame_desc[j].length =
276                                                 dev->isoc_ctl.max_pkt_size;
277                         k += dev->isoc_ctl.max_pkt_size;
278                 }
279         }
280
281         init_waitqueue_head(&dma_q->wq);
282
283         /* submit urbs and enables IRQ */
284         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
285                 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
286                 if (rc) {
287                         au0828_isocdbg("submit of urb %i failed (error=%i)\n",
288                                        i, rc);
289                         au0828_uninit_isoc(dev);
290                         return rc;
291                 }
292         }
293
294         return 0;
295 }
296
297 /*
298  * Announces that a buffer were filled and request the next
299  */
300 static inline void buffer_filled(struct au0828_dev *dev,
301                                   struct au0828_dmaqueue *dma_q,
302                                   struct au0828_buffer *buf)
303 {
304         /* Advice that buffer was filled */
305         au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
306
307         buf->vb.state = VIDEOBUF_DONE;
308         buf->vb.field_count++;
309         do_gettimeofday(&buf->vb.ts);
310
311         dev->isoc_ctl.buf = NULL;
312
313         list_del(&buf->vb.queue);
314         wake_up(&buf->vb.done);
315 }
316
317 /*
318  * Identify the buffer header type and properly handles
319  */
320 static void au0828_copy_video(struct au0828_dev *dev,
321                               struct au0828_dmaqueue  *dma_q,
322                               struct au0828_buffer *buf,
323                               unsigned char *p,
324                               unsigned char *outp, unsigned long len)
325 {
326         void *fieldstart, *startwrite, *startread;
327         int  linesdone, currlinedone, offset, lencopy, remain;
328         int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
329
330         if (dma_q->pos + len > buf->vb.size)
331                 len = buf->vb.size - dma_q->pos;
332
333         startread = p;
334         remain = len;
335
336         /* Interlaces frame */
337         if (buf->top_field)
338                 fieldstart = outp;
339         else
340                 fieldstart = outp + bytesperline;
341
342         linesdone = dma_q->pos / bytesperline;
343         currlinedone = dma_q->pos % bytesperline;
344         offset = linesdone * bytesperline * 2 + currlinedone;
345         startwrite = fieldstart + offset;
346         lencopy = bytesperline - currlinedone;
347         lencopy = lencopy > remain ? remain : lencopy;
348
349         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
350                 au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
351                                ((char *)startwrite + lencopy) -
352                                ((char *)outp + buf->vb.size));
353                 remain = (char *)outp + buf->vb.size - (char *)startwrite;
354                 lencopy = remain;
355         }
356         if (lencopy <= 0)
357                 return;
358         memcpy(startwrite, startread, lencopy);
359
360         remain -= lencopy;
361
362         while (remain > 0) {
363                 startwrite += lencopy + bytesperline;
364                 startread += lencopy;
365                 if (bytesperline > remain)
366                         lencopy = remain;
367                 else
368                         lencopy = bytesperline;
369
370                 if ((char *)startwrite + lencopy > (char *)outp +
371                     buf->vb.size) {
372                         au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
373                                        ((char *)startwrite + lencopy) -
374                                        ((char *)outp + buf->vb.size));
375                         lencopy = remain = (char *)outp + buf->vb.size -
376                                            (char *)startwrite;
377                 }
378                 if (lencopy <= 0)
379                         break;
380
381                 memcpy(startwrite, startread, lencopy);
382
383                 remain -= lencopy;
384         }
385
386         if (offset > 1440) {
387                 /* We have enough data to check for greenscreen */
388                 if (outp[0] < 0x60 && outp[1440] < 0x60)
389                         dev->greenscreen_detected = 1;
390         }
391
392         dma_q->pos += len;
393 }
394
395 /*
396  * video-buf generic routine to get the next available buffer
397  */
398 static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
399                                 struct au0828_buffer **buf)
400 {
401         struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
402
403         if (list_empty(&dma_q->active)) {
404                 au0828_isocdbg("No active queue to serve\n");
405                 dev->isoc_ctl.buf = NULL;
406                 *buf = NULL;
407                 return;
408         }
409
410         /* Get the next buffer */
411         *buf = list_entry(dma_q->active.next, struct au0828_buffer, vb.queue);
412         dev->isoc_ctl.buf = *buf;
413
414         return;
415 }
416
417 /*
418  * Controls the isoc copy of each urb packet
419  */
420 static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
421 {
422         struct au0828_buffer    *buf;
423         struct au0828_dmaqueue  *dma_q = urb->context;
424         unsigned char *outp = NULL;
425         int i, len = 0, rc = 1;
426         unsigned char *p;
427         unsigned char fbyte;
428
429         if (!dev)
430                 return 0;
431
432         if ((dev->dev_state & DEV_DISCONNECTED) ||
433             (dev->dev_state & DEV_MISCONFIGURED))
434                 return 0;
435
436         if (urb->status < 0) {
437                 print_err_status(dev, -1, urb->status);
438                 if (urb->status == -ENOENT)
439                         return 0;
440         }
441
442         buf = dev->isoc_ctl.buf;
443         if (buf != NULL)
444                 outp = videobuf_to_vmalloc(&buf->vb);
445
446         for (i = 0; i < urb->number_of_packets; i++) {
447                 int status = urb->iso_frame_desc[i].status;
448
449                 if (status < 0) {
450                         print_err_status(dev, i, status);
451                         if (urb->iso_frame_desc[i].status != -EPROTO)
452                                 continue;
453                 }
454
455                 if (urb->iso_frame_desc[i].actual_length <= 0)
456                         continue;
457
458                 if (urb->iso_frame_desc[i].actual_length >
459                                                 dev->max_pkt_size) {
460                         au0828_isocdbg("packet bigger than packet size");
461                         continue;
462                 }
463
464                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
465                 fbyte = p[0];
466                 len = urb->iso_frame_desc[i].actual_length - 4;
467                 p += 4;
468
469                 if (fbyte & 0x80) {
470                         len -= 4;
471                         p += 4;
472                         au0828_isocdbg("Video frame %s\n",
473                                        (fbyte & 0x40) ? "odd" : "even");
474                         if (!(fbyte & 0x40)) {
475                                 if (buf != NULL)
476                                         buffer_filled(dev, dma_q, buf);
477                                 get_next_buf(dma_q, &buf);
478                                 if (buf == NULL)
479                                         outp = NULL;
480                                 else
481                                         outp = videobuf_to_vmalloc(&buf->vb);
482                         }
483
484                         if (buf != NULL) {
485                                 if (fbyte & 0x40)
486                                         buf->top_field = 1;
487                                 else
488                                         buf->top_field = 0;
489                         }
490
491                         dma_q->pos = 0;
492                 }
493                 if (buf != NULL)
494                         au0828_copy_video(dev, dma_q, buf, p, outp, len);
495         }
496         return rc;
497 }
498
499 static int
500 buffer_setup(struct videobuf_queue *vq, unsigned int *count,
501              unsigned int *size)
502 {
503         struct au0828_fh *fh = vq->priv_data;
504         *size = (fh->dev->width * fh->dev->height * 16 + 7) >> 3;
505
506         if (0 == *count)
507                 *count = AU0828_DEF_BUF;
508
509         if (*count < AU0828_MIN_BUF)
510                 *count = AU0828_MIN_BUF;
511         return 0;
512 }
513
514 /* This is called *without* dev->slock held; please keep it that way */
515 static void free_buffer(struct videobuf_queue *vq, struct au0828_buffer *buf)
516 {
517         struct au0828_fh     *fh  = vq->priv_data;
518         struct au0828_dev    *dev = fh->dev;
519         unsigned long flags = 0;
520         if (in_interrupt())
521                 BUG();
522
523         /* We used to wait for the buffer to finish here, but this didn't work
524            because, as we were keeping the state as VIDEOBUF_QUEUED,
525            videobuf_queue_cancel marked it as finished for us.
526            (Also, it could wedge forever if the hardware was misconfigured.)
527
528            This should be safe; by the time we get here, the buffer isn't
529            queued anymore. If we ever start marking the buffers as
530            VIDEOBUF_ACTIVE, it won't be, though.
531         */
532         spin_lock_irqsave(&dev->slock, flags);
533         if (dev->isoc_ctl.buf == buf)
534                 dev->isoc_ctl.buf = NULL;
535         spin_unlock_irqrestore(&dev->slock, flags);
536
537         videobuf_vmalloc_free(&buf->vb);
538         buf->vb.state = VIDEOBUF_NEEDS_INIT;
539 }
540
541 static int
542 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
543                                                 enum v4l2_field field)
544 {
545         struct au0828_fh     *fh  = vq->priv_data;
546         struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
547         struct au0828_dev    *dev = fh->dev;
548         int                  rc = 0, urb_init = 0;
549
550         buf->vb.size = (fh->dev->width * fh->dev->height * 16 + 7) >> 3;
551
552         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
553                 return -EINVAL;
554
555         buf->vb.width  = dev->width;
556         buf->vb.height = dev->height;
557         buf->vb.field  = field;
558
559         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
560                 rc = videobuf_iolock(vq, &buf->vb, NULL);
561                 if (rc < 0) {
562                         printk(KERN_INFO "videobuf_iolock failed\n");
563                         goto fail;
564                 }
565         }
566
567         if (!dev->isoc_ctl.num_bufs)
568                 urb_init = 1;
569
570         if (urb_init) {
571                 rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
572                                       AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
573                                       au0828_isoc_copy);
574                 if (rc < 0) {
575                         printk(KERN_INFO "au0828_init_isoc failed\n");
576                         goto fail;
577                 }
578         }
579
580         buf->vb.state = VIDEOBUF_PREPARED;
581         return 0;
582
583 fail:
584         free_buffer(vq, buf);
585         return rc;
586 }
587
588 static void
589 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
590 {
591         struct au0828_buffer    *buf     = container_of(vb,
592                                                         struct au0828_buffer,
593                                                         vb);
594         struct au0828_fh        *fh      = vq->priv_data;
595         struct au0828_dev       *dev     = fh->dev;
596         struct au0828_dmaqueue  *vidq    = &dev->vidq;
597
598         buf->vb.state = VIDEOBUF_QUEUED;
599         list_add_tail(&buf->vb.queue, &vidq->active);
600 }
601
602 static void buffer_release(struct videobuf_queue *vq,
603                                 struct videobuf_buffer *vb)
604 {
605         struct au0828_buffer   *buf  = container_of(vb,
606                                                     struct au0828_buffer,
607                                                     vb);
608
609         free_buffer(vq, buf);
610 }
611
612 static struct videobuf_queue_ops au0828_video_qops = {
613         .buf_setup      = buffer_setup,
614         .buf_prepare    = buffer_prepare,
615         .buf_queue      = buffer_queue,
616         .buf_release    = buffer_release,
617 };
618
619 /* ------------------------------------------------------------------
620    V4L2 interface
621    ------------------------------------------------------------------*/
622
623 static int au0828_i2s_init(struct au0828_dev *dev)
624 {
625         /* Enable i2s mode */
626         au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
627         return 0;
628 }
629
630 /*
631  * Auvitek au0828 analog stream enable
632  * Please set interface0 to AS5 before enable the stream
633  */
634 int au0828_analog_stream_enable(struct au0828_dev *d)
635 {
636         dprintk(1, "au0828_analog_stream_enable called\n");
637         au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
638         au0828_writereg(d, 0x106, 0x00);
639         /* set x position */
640         au0828_writereg(d, 0x110, 0x00);
641         au0828_writereg(d, 0x111, 0x00);
642         au0828_writereg(d, 0x114, 0xa0);
643         au0828_writereg(d, 0x115, 0x05);
644         /* set y position */
645         au0828_writereg(d, 0x112, 0x02);
646         au0828_writereg(d, 0x113, 0x00);
647         au0828_writereg(d, 0x116, 0xf2);
648         au0828_writereg(d, 0x117, 0x00);
649         au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
650
651         return 0;
652 }
653
654 int au0828_analog_stream_disable(struct au0828_dev *d)
655 {
656         dprintk(1, "au0828_analog_stream_disable called\n");
657         au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
658         return 0;
659 }
660
661 void au0828_analog_stream_reset(struct au0828_dev *dev)
662 {
663         dprintk(1, "au0828_analog_stream_reset called\n");
664         au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
665         mdelay(30);
666         au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
667 }
668
669 /*
670  * Some operations needs to stop current streaming
671  */
672 static int au0828_stream_interrupt(struct au0828_dev *dev)
673 {
674         int ret = 0;
675
676         dev->stream_state = STREAM_INTERRUPT;
677         if (dev->dev_state == DEV_DISCONNECTED)
678                 return -ENODEV;
679         else if (ret) {
680                 dev->dev_state = DEV_MISCONFIGURED;
681                 dprintk(1, "%s device is misconfigured!\n", __func__);
682                 return ret;
683         }
684         return 0;
685 }
686
687 /*
688  * au0828_release_resources
689  * unregister v4l2 devices
690  */
691 void au0828_analog_unregister(struct au0828_dev *dev)
692 {
693         dprintk(1, "au0828_release_resources called\n");
694         mutex_lock(&au0828_sysfs_lock);
695
696         if (dev->vdev) {
697                 list_del(&dev->au0828list);
698                 video_unregister_device(dev->vdev);
699         }
700         if (dev->vbi_dev)
701                 video_unregister_device(dev->vbi_dev);
702
703         mutex_unlock(&au0828_sysfs_lock);
704 }
705
706
707 /* Usage lock check functions */
708 static int res_get(struct au0828_fh *fh)
709 {
710         struct au0828_dev *dev = fh->dev;
711         int              rc   = 0;
712
713         /* This instance already has stream_on */
714         if (fh->stream_on)
715                 return rc;
716
717         if (dev->stream_on)
718                 return -EBUSY;
719
720         dev->stream_on = 1;
721         fh->stream_on  = 1;
722         return rc;
723 }
724
725 static int res_check(struct au0828_fh *fh)
726 {
727         return fh->stream_on;
728 }
729
730 static void res_free(struct au0828_fh *fh)
731 {
732         struct au0828_dev *dev = fh->dev;
733
734         fh->stream_on = 0;
735         dev->stream_on = 0;
736 }
737
738 static int au0828_v4l2_open(struct file *filp)
739 {
740         int minor = video_devdata(filp)->minor;
741         int ret = 0;
742         struct au0828_dev *h, *dev = NULL;
743         struct au0828_fh *fh;
744         int type = 0;
745         struct list_head *list;
746
747         list_for_each(list, &au0828_devlist) {
748                 h = list_entry(list, struct au0828_dev, au0828list);
749                 if (h->vdev->minor == minor) {
750                         dev = h;
751                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
752                 }
753 #ifdef VBI_IS_WORKING
754                 if (h->vbi_dev->minor == minor) {
755                         dev = h;
756                         type = V4L2_BUF_TYPE_VBI_CAPTURE;
757                 }
758 #endif
759         }
760
761         if (NULL == dev)
762                 return -ENODEV;
763
764         fh = kzalloc(sizeof(struct au0828_fh), GFP_KERNEL);
765         if (NULL == fh) {
766                 dprintk(1, "Failed allocate au0828_fh struct!\n");
767                 return -ENOMEM;
768         }
769
770         fh->type = type;
771         fh->dev = dev;
772         filp->private_data = fh;
773
774         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
775                 /* set au0828 interface0 to AS5 here again */
776                 ret = usb_set_interface(dev->usbdev, 0, 5);
777                 if (ret < 0) {
778                         printk(KERN_INFO "Au0828 can't set alternate to 5!\n");
779                         return -EBUSY;
780                 }
781                 dev->width = NTSC_STD_W;
782                 dev->height = NTSC_STD_H;
783                 dev->frame_size = dev->width * dev->height * 2;
784                 dev->field_size = dev->width * dev->height;
785                 dev->bytesperline = dev->width * 2;
786
787                 au0828_analog_stream_enable(dev);
788                 au0828_analog_stream_reset(dev);
789
790                 /* If we were doing ac97 instead of i2s, it would go here...*/
791                 au0828_i2s_init(dev);
792
793                 dev->stream_state = STREAM_OFF;
794                 dev->dev_state |= DEV_INITIALIZED;
795         }
796
797         dev->users++;
798
799         videobuf_queue_vmalloc_init(&fh->vb_vidq, &au0828_video_qops,
800                                     NULL, &dev->slock, fh->type,
801                                     V4L2_FIELD_INTERLACED,
802                                     sizeof(struct au0828_buffer), fh);
803
804         return ret;
805 }
806
807 static int au0828_v4l2_close(struct file *filp)
808 {
809         int ret;
810         struct au0828_fh *fh = filp->private_data;
811         struct au0828_dev *dev = fh->dev;
812
813         mutex_lock(&dev->lock);
814         if (res_check(fh))
815                 res_free(fh);
816
817         if (dev->users == 1) {
818                 videobuf_stop(&fh->vb_vidq);
819                 videobuf_mmap_free(&fh->vb_vidq);
820
821                 if (dev->dev_state & DEV_DISCONNECTED) {
822                         au0828_analog_unregister(dev);
823                         mutex_unlock(&dev->lock);
824                         kfree(dev);
825                         return 0;
826                 }
827
828                 au0828_analog_stream_disable(dev);
829
830                 au0828_uninit_isoc(dev);
831
832                 /* When close the device, set the usb intf0 into alt0 to free
833                    USB bandwidth */
834                 ret = usb_set_interface(dev->usbdev, 0, 0);
835                 if (ret < 0)
836                         printk(KERN_INFO "Au0828 can't set alternate to 0!\n");
837         }
838
839         kfree(fh);
840         dev->users--;
841         wake_up_interruptible_nr(&dev->open, 1);
842         mutex_unlock(&dev->lock);
843         return 0;
844 }
845
846 static ssize_t au0828_v4l2_read(struct file *filp, char __user *buf,
847                                 size_t count, loff_t *pos)
848 {
849         struct au0828_fh *fh = filp->private_data;
850         struct au0828_dev *dev = fh->dev;
851         int rc;
852
853         rc = check_dev(dev);
854         if (rc < 0)
855                 return rc;
856
857         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
858                 mutex_lock(&dev->lock);
859                 rc = res_get(fh);
860                 mutex_unlock(&dev->lock);
861
862                 if (unlikely(rc < 0))
863                         return rc;
864
865                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
866                                         filp->f_flags & O_NONBLOCK);
867         }
868         return 0;
869 }
870
871 static unsigned int au0828_v4l2_poll(struct file *filp, poll_table *wait)
872 {
873         struct au0828_fh *fh = filp->private_data;
874         struct au0828_dev *dev = fh->dev;
875         int rc;
876
877         rc = check_dev(dev);
878         if (rc < 0)
879                 return rc;
880
881         mutex_lock(&dev->lock);
882         rc = res_get(fh);
883         mutex_unlock(&dev->lock);
884
885         if (unlikely(rc < 0))
886                 return POLLERR;
887
888         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
889                 return POLLERR;
890
891         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
892 }
893
894 static int au0828_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
895 {
896         struct au0828_fh *fh    = filp->private_data;
897         struct au0828_dev *dev   = fh->dev;
898         int              rc;
899
900         rc = check_dev(dev);
901         if (rc < 0)
902                 return rc;
903
904         mutex_lock(&dev->lock);
905         rc = res_get(fh);
906         mutex_unlock(&dev->lock);
907
908         if (unlikely(rc < 0))
909                 return rc;
910
911         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
912
913         dprintk(2, "vma start=0x%08lx, size=%ld, ret=%d\n",
914                 (unsigned long)vma->vm_start,
915                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
916                 rc);
917
918         return rc;
919 }
920
921 static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
922                              struct v4l2_format *format)
923 {
924         int ret;
925         int width = format->fmt.pix.width;
926         int height = format->fmt.pix.height;
927         unsigned int maxwidth, maxheight;
928
929         maxwidth = 720;
930         maxheight = 480;
931
932 #ifdef VBI_IS_WORKING
933         if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
934                 dprintk(1, "VBI format set: to be supported!\n");
935                 return 0;
936         }
937         if (format->type == V4L2_BUF_TYPE_VBI_CAPTURE)
938                 return 0;
939 #endif
940         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
941                 return -EINVAL;
942
943         /* If they are demanding a format other than the one we support,
944            bail out (tvtime asks for UYVY and then retries with YUYV) */
945         if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
946                 return -EINVAL;
947
948         /* format->fmt.pix.width only support 720 and height 480 */
949         if (width != 720)
950                 width = 720;
951         if (height != 480)
952                 height = 480;
953
954         format->fmt.pix.width = width;
955         format->fmt.pix.height = height;
956         format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
957         format->fmt.pix.bytesperline = width * 2;
958         format->fmt.pix.sizeimage = width * height * 2;
959         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
960         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
961
962         if (cmd == VIDIOC_TRY_FMT)
963                 return 0;
964
965         /* maybe set new image format, driver current only support 720*480 */
966         dev->width = width;
967         dev->height = height;
968         dev->frame_size = width * height * 2;
969         dev->field_size = width * height;
970         dev->bytesperline = width * 2;
971
972         if (dev->stream_state == STREAM_ON) {
973                 dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
974                 ret = au0828_stream_interrupt(dev);
975                 if (ret != 0) {
976                         dprintk(1, "error interrupting video stream!\n");
977                         return ret;
978                 }
979         }
980
981         /* set au0828 interface0 to AS5 here again */
982         ret = usb_set_interface(dev->usbdev, 0, 5);
983         if (ret < 0) {
984                 printk(KERN_INFO "Au0828 can't set alt setting to 5!\n");
985                 return -EBUSY;
986         }
987
988         au0828_analog_stream_enable(dev);
989
990         return 0;
991 }
992
993
994 static int vidioc_queryctrl(struct file *file, void *priv,
995                             struct v4l2_queryctrl *qc)
996 {
997         struct au0828_fh *fh = priv;
998         struct au0828_dev *dev = fh->dev;
999         v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
1000         if (qc->type)
1001                 return 0;
1002         else
1003                 return -EINVAL;
1004 }
1005
1006 static int vidioc_querycap(struct file *file, void  *priv,
1007                            struct v4l2_capability *cap)
1008 {
1009         struct au0828_fh *fh  = priv;
1010         struct au0828_dev *dev = fh->dev;
1011
1012         strlcpy(cap->driver, "au0828", sizeof(cap->driver));
1013         strlcpy(cap->card, dev->board.name, sizeof(cap->card));
1014         strlcpy(cap->bus_info, dev->v4l2_dev.name, sizeof(cap->bus_info));
1015
1016         cap->version = AU0828_VERSION_CODE;
1017
1018         /*set the device capabilities */
1019         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
1020 #ifdef VBI_IS_WORKING
1021                 V4L2_CAP_VBI_CAPTURE |
1022 #endif
1023                 V4L2_CAP_AUDIO |
1024                 V4L2_CAP_READWRITE |
1025                 V4L2_CAP_STREAMING |
1026                 V4L2_CAP_TUNER;
1027         return 0;
1028 }
1029
1030 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1031                                         struct v4l2_fmtdesc *f)
1032 {
1033         if (f->index)
1034                 return -EINVAL;
1035
1036         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1037         strcpy(f->description, "Packed YUV2");
1038
1039         f->flags = 0;
1040         f->pixelformat = V4L2_PIX_FMT_UYVY;
1041
1042         return 0;
1043 }
1044
1045 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1046                                         struct v4l2_format *f)
1047 {
1048         struct au0828_fh *fh  = priv;
1049         struct au0828_dev *dev = fh->dev;
1050
1051         f->fmt.pix.width = dev->width;
1052         f->fmt.pix.height = dev->height;
1053         f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1054         f->fmt.pix.bytesperline = dev->bytesperline;
1055         f->fmt.pix.sizeimage = dev->frame_size;
1056         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
1057         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1058         return 0;
1059 }
1060
1061 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1062                                   struct v4l2_format *f)
1063 {
1064         struct au0828_fh *fh  = priv;
1065         struct au0828_dev *dev = fh->dev;
1066
1067         return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
1068 }
1069
1070 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1071                                 struct v4l2_format *f)
1072 {
1073         struct au0828_fh *fh  = priv;
1074         struct au0828_dev *dev = fh->dev;
1075         int rc;
1076
1077         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
1078                 printk(KERN_INFO "%s queue busy\n", __func__);
1079                 rc = -EBUSY;
1080                 goto out;
1081         }
1082
1083         if (dev->stream_on && !fh->stream_on) {
1084                 printk(KERN_INFO "%s device in use by another fh\n", __func__);
1085                 rc = -EBUSY;
1086                 goto out;
1087         }
1088
1089         return au0828_set_format(dev, VIDIOC_S_FMT, f);
1090 out:
1091         return rc;
1092 }
1093
1094 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
1095 {
1096         struct au0828_fh *fh = priv;
1097         struct au0828_dev *dev = fh->dev;
1098
1099         /* FIXME: when we support something other than NTSC, we are going to
1100            have to make the au0828 bridge adjust the size of its capture
1101            buffer, which is currently hardcoded at 720x480 */
1102
1103         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, *norm);
1104         return 0;
1105 }
1106
1107 static int vidioc_enum_input(struct file *file, void *priv,
1108                                 struct v4l2_input *input)
1109 {
1110         struct au0828_fh *fh = priv;
1111         struct au0828_dev *dev = fh->dev;
1112         unsigned int tmp;
1113
1114         static const char *inames[] = {
1115                 [AU0828_VMUX_UNDEFINED] = "Undefined",
1116                 [AU0828_VMUX_COMPOSITE] = "Composite",
1117                 [AU0828_VMUX_SVIDEO] = "S-Video",
1118                 [AU0828_VMUX_CABLE] = "Cable TV",
1119                 [AU0828_VMUX_TELEVISION] = "Television",
1120                 [AU0828_VMUX_DVB] = "DVB",
1121                 [AU0828_VMUX_DEBUG] = "tv debug"
1122         };
1123
1124         tmp = input->index;
1125
1126         if (tmp > AU0828_MAX_INPUT)
1127                 return -EINVAL;
1128         if (AUVI_INPUT(tmp).type == 0)
1129                 return -EINVAL;
1130
1131         input->index = tmp;
1132         strcpy(input->name, inames[AUVI_INPUT(tmp).type]);
1133         if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
1134             (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE))
1135                 input->type |= V4L2_INPUT_TYPE_TUNER;
1136         else
1137                 input->type |= V4L2_INPUT_TYPE_CAMERA;
1138
1139         input->std = dev->vdev->tvnorms;
1140
1141         return 0;
1142 }
1143
1144 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1145 {
1146         struct au0828_fh *fh = priv;
1147         struct au0828_dev *dev = fh->dev;
1148         *i = dev->ctrl_input;
1149         return 0;
1150 }
1151
1152 static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
1153 {
1154         struct au0828_fh *fh = priv;
1155         struct au0828_dev *dev = fh->dev;
1156         int i;
1157
1158         dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
1159                 index);
1160         if (index >= AU0828_MAX_INPUT)
1161                 return -EINVAL;
1162         if (AUVI_INPUT(index).type == 0)
1163                 return -EINVAL;
1164         dev->ctrl_input = index;
1165
1166         switch (AUVI_INPUT(index).type) {
1167         case AU0828_VMUX_SVIDEO:
1168                 dev->input_type = AU0828_VMUX_SVIDEO;
1169                 break;
1170         case AU0828_VMUX_COMPOSITE:
1171                 dev->input_type = AU0828_VMUX_COMPOSITE;
1172                 break;
1173         case AU0828_VMUX_TELEVISION:
1174                 dev->input_type = AU0828_VMUX_TELEVISION;
1175                 break;
1176         default:
1177                 dprintk(1, "VIDIOC_S_INPUT unknown input type set [%d]\n",
1178                         AUVI_INPUT(index).type);
1179                 break;
1180         }
1181
1182         v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
1183                         AUVI_INPUT(index).vmux, 0, 0);
1184
1185         for (i = 0; i < AU0828_MAX_INPUT; i++) {
1186                 int enable = 0;
1187                 if (AUVI_INPUT(i).audio_setup == NULL)
1188                         continue;
1189
1190                 if (i == index)
1191                         enable = 1;
1192                 else
1193                         enable = 0;
1194                 if (enable) {
1195                         (AUVI_INPUT(i).audio_setup)(dev, enable);
1196                 } else {
1197                         /* Make sure we leave it turned on if some
1198                            other input is routed to this callback */
1199                         if ((AUVI_INPUT(i).audio_setup) !=
1200                             ((AUVI_INPUT(index).audio_setup))) {
1201                                 (AUVI_INPUT(i).audio_setup)(dev, enable);
1202                         }
1203                 }
1204         }
1205
1206         v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
1207                         AUVI_INPUT(index).amux, 0, 0);
1208         return 0;
1209 }
1210
1211 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1212 {
1213         struct au0828_fh *fh = priv;
1214         struct au0828_dev *dev = fh->dev;
1215         unsigned int index = a->index;
1216
1217         if (a->index > 1)
1218                 return -EINVAL;
1219
1220         index = dev->ctrl_ainput;
1221         if (index == 0)
1222                 strcpy(a->name, "Television");
1223         else
1224                 strcpy(a->name, "Line in");
1225
1226         a->capability = V4L2_AUDCAP_STEREO;
1227         a->index = index;
1228         return 0;
1229 }
1230
1231 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1232 {
1233         struct au0828_fh *fh = priv;
1234         struct au0828_dev *dev = fh->dev;
1235         if (a->index != dev->ctrl_ainput)
1236                 return -EINVAL;
1237         return 0;
1238 }
1239
1240 static int vidioc_g_ctrl(struct file *file, void *priv,
1241                          struct v4l2_control *ctrl)
1242 {
1243         struct au0828_fh *fh = priv;
1244         struct au0828_dev *dev = fh->dev;
1245
1246         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
1247         return 0;
1248
1249 }
1250
1251 static int vidioc_s_ctrl(struct file *file, void *priv,
1252                                 struct v4l2_control *ctrl)
1253 {
1254         struct au0828_fh *fh = priv;
1255         struct au0828_dev *dev = fh->dev;
1256         v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
1257         return 0;
1258 }
1259
1260 static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1261 {
1262         struct au0828_fh *fh = priv;
1263         struct au0828_dev *dev = fh->dev;
1264
1265         if (t->index != 0)
1266                 return -EINVAL;
1267
1268         strcpy(t->name, "Auvitek tuner");
1269         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1270         return 0;
1271 }
1272
1273 static int vidioc_s_tuner(struct file *file, void *priv,
1274                                 struct v4l2_tuner *t)
1275 {
1276         struct au0828_fh *fh = priv;
1277         struct au0828_dev *dev = fh->dev;
1278
1279         if (t->index != 0)
1280                 return -EINVAL;
1281
1282         t->type = V4L2_TUNER_ANALOG_TV;
1283         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1284         dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
1285                 t->afc);
1286         return 0;
1287
1288 }
1289
1290 static int vidioc_g_frequency(struct file *file, void *priv,
1291                                 struct v4l2_frequency *freq)
1292 {
1293         struct au0828_fh *fh = priv;
1294         struct au0828_dev *dev = fh->dev;
1295
1296         freq->type = V4L2_TUNER_ANALOG_TV;
1297         freq->frequency = dev->ctrl_freq;
1298         return 0;
1299 }
1300
1301 static int vidioc_s_frequency(struct file *file, void *priv,
1302                                 struct v4l2_frequency *freq)
1303 {
1304         struct au0828_fh *fh = priv;
1305         struct au0828_dev *dev = fh->dev;
1306
1307         if (freq->tuner != 0)
1308                 return -EINVAL;
1309         if (freq->type != V4L2_TUNER_ANALOG_TV)
1310                 return -EINVAL;
1311
1312         dev->ctrl_freq = freq->frequency;
1313
1314         v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
1315
1316         au0828_analog_stream_reset(dev);
1317
1318         return 0;
1319 }
1320
1321 static int vidioc_g_chip_ident(struct file *file, void *priv,
1322                struct v4l2_dbg_chip_ident *chip)
1323 {
1324         struct au0828_fh *fh = priv;
1325         struct au0828_dev *dev = fh->dev;
1326         chip->ident = V4L2_IDENT_NONE;
1327         chip->revision = 0;
1328
1329         if (v4l2_chip_match_host(&chip->match)) {
1330                 chip->ident = V4L2_IDENT_AU0828;
1331                 return 0;
1332         }
1333
1334         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
1335         if (chip->ident == V4L2_IDENT_NONE)
1336                 return -EINVAL;
1337
1338         return 0;
1339 }
1340
1341 static int vidioc_cropcap(struct file *file, void *priv,
1342                           struct v4l2_cropcap *cc)
1343 {
1344         struct au0828_fh *fh = priv;
1345         struct au0828_dev *dev = fh->dev;
1346
1347         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1348                 return -EINVAL;
1349
1350         cc->bounds.left = 0;
1351         cc->bounds.top = 0;
1352         cc->bounds.width = dev->width;
1353         cc->bounds.height = dev->height;
1354
1355         cc->defrect = cc->bounds;
1356
1357         cc->pixelaspect.numerator = 54;
1358         cc->pixelaspect.denominator = 59;
1359
1360         return 0;
1361 }
1362
1363 static int vidioc_streamon(struct file *file, void *priv,
1364                            enum v4l2_buf_type type)
1365 {
1366         struct au0828_fh *fh = priv;
1367         struct au0828_dev *dev = fh->dev;
1368         int rc;
1369
1370         rc = check_dev(dev);
1371         if (rc < 0)
1372                 return rc;
1373
1374         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1375                 au0828_analog_stream_enable(dev);
1376                 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
1377         }
1378
1379         mutex_lock(&dev->lock);
1380         rc = res_get(fh);
1381
1382         if (likely(rc >= 0))
1383                 rc = videobuf_streamon(&fh->vb_vidq);
1384         mutex_unlock(&dev->lock);
1385
1386         return rc;
1387 }
1388
1389 static int vidioc_streamoff(struct file *file, void *priv,
1390                             enum v4l2_buf_type type)
1391 {
1392         struct au0828_fh *fh = priv;
1393         struct au0828_dev *dev = fh->dev;
1394         int i;
1395         int ret;
1396         int rc;
1397
1398         rc = check_dev(dev);
1399         if (rc < 0)
1400                 return rc;
1401
1402         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1403                 return -EINVAL;
1404         if (type != fh->type)
1405                 return -EINVAL;
1406
1407         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1408                 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
1409                 ret = au0828_stream_interrupt(dev);
1410                 if (ret != 0)
1411                         return ret;
1412         }
1413
1414         for (i = 0; i < AU0828_MAX_INPUT; i++) {
1415                 if (AUVI_INPUT(i).audio_setup == NULL)
1416                         continue;
1417                 (AUVI_INPUT(i).audio_setup)(dev, 0);
1418         }
1419
1420         mutex_lock(&dev->lock);
1421         videobuf_streamoff(&fh->vb_vidq);
1422         res_free(fh);
1423         mutex_unlock(&dev->lock);
1424
1425         return 0;
1426 }
1427
1428 #ifdef CONFIG_VIDEO_ADV_DEBUG
1429 static int vidioc_g_register(struct file *file, void *priv,
1430                              struct v4l2_dbg_register *reg)
1431 {
1432         struct au0828_fh *fh = priv;
1433         struct au0828_dev *dev = fh->dev;
1434
1435         switch (reg->match.type) {
1436         case V4L2_CHIP_MATCH_I2C_DRIVER:
1437                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
1438                 return 0;
1439         default:
1440                 return -EINVAL;
1441         }
1442 }
1443
1444 static int vidioc_s_register(struct file *file, void *priv,
1445                              struct v4l2_dbg_register *reg)
1446 {
1447         struct au0828_fh *fh = priv;
1448         struct au0828_dev *dev = fh->dev;
1449
1450         switch (reg->match.type) {
1451         case V4L2_CHIP_MATCH_I2C_DRIVER:
1452                 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
1453                 return 0;
1454         default:
1455                 return -EINVAL;
1456         }
1457         return 0;
1458 }
1459 #endif
1460
1461 static int vidioc_reqbufs(struct file *file, void *priv,
1462                           struct v4l2_requestbuffers *rb)
1463 {
1464         struct au0828_fh *fh = priv;
1465         struct au0828_dev *dev = fh->dev;
1466         int rc;
1467
1468         rc = check_dev(dev);
1469         if (rc < 0)
1470                 return rc;
1471
1472         return videobuf_reqbufs(&fh->vb_vidq, rb);
1473 }
1474
1475 static int vidioc_querybuf(struct file *file, void *priv,
1476                            struct v4l2_buffer *b)
1477 {
1478         struct au0828_fh *fh = priv;
1479         struct au0828_dev *dev = fh->dev;
1480         int rc;
1481
1482         rc = check_dev(dev);
1483         if (rc < 0)
1484                 return rc;
1485
1486         return videobuf_querybuf(&fh->vb_vidq, b);
1487 }
1488
1489 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1490 {
1491         struct au0828_fh *fh = priv;
1492         struct au0828_dev *dev = fh->dev;
1493         int rc;
1494
1495         rc = check_dev(dev);
1496         if (rc < 0)
1497                 return rc;
1498
1499         return videobuf_qbuf(&fh->vb_vidq, b);
1500 }
1501
1502 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1503 {
1504         struct au0828_fh *fh = priv;
1505         struct au0828_dev *dev = fh->dev;
1506         int rc;
1507
1508         rc = check_dev(dev);
1509         if (rc < 0)
1510                 return rc;
1511
1512         /* Workaround for a bug in the au0828 hardware design that sometimes
1513            results in the colorspace being inverted */
1514         if (dev->greenscreen_detected == 1) {
1515                 dprintk(1, "Detected green frame.  Resetting stream...\n");
1516                 au0828_analog_stream_reset(dev);
1517                 dev->greenscreen_detected = 0;
1518         }
1519
1520         return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
1521 }
1522
1523 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1524 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1525 {
1526         struct au0828_fh *fh = priv;
1527
1528         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1529 }
1530 #endif
1531
1532 static struct v4l2_file_operations au0828_v4l_fops = {
1533         .owner      = THIS_MODULE,
1534         .open       = au0828_v4l2_open,
1535         .release    = au0828_v4l2_close,
1536         .read       = au0828_v4l2_read,
1537         .poll       = au0828_v4l2_poll,
1538         .mmap       = au0828_v4l2_mmap,
1539         .ioctl      = video_ioctl2,
1540 };
1541
1542 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1543         .vidioc_querycap            = vidioc_querycap,
1544         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1545         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1546         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1547         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1548 #ifdef VBI_IS_WORKING
1549         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1550         .vidioc_try_fmt_vbi_cap     = vidioc_s_fmt_vbi_cap,
1551         .vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
1552 #endif
1553         .vidioc_g_audio             = vidioc_g_audio,
1554         .vidioc_s_audio             = vidioc_s_audio,
1555         .vidioc_cropcap             = vidioc_cropcap,
1556 #ifdef VBI_IS_WORKING
1557         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1558         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1559         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1560 #endif
1561         .vidioc_reqbufs             = vidioc_reqbufs,
1562         .vidioc_querybuf            = vidioc_querybuf,
1563         .vidioc_qbuf                = vidioc_qbuf,
1564         .vidioc_dqbuf               = vidioc_dqbuf,
1565         .vidioc_s_std               = vidioc_s_std,
1566         .vidioc_enum_input          = vidioc_enum_input,
1567         .vidioc_g_input             = vidioc_g_input,
1568         .vidioc_s_input             = vidioc_s_input,
1569         .vidioc_queryctrl           = vidioc_queryctrl,
1570         .vidioc_g_ctrl              = vidioc_g_ctrl,
1571         .vidioc_s_ctrl              = vidioc_s_ctrl,
1572         .vidioc_streamon            = vidioc_streamon,
1573         .vidioc_streamoff           = vidioc_streamoff,
1574         .vidioc_g_tuner             = vidioc_g_tuner,
1575         .vidioc_s_tuner             = vidioc_s_tuner,
1576         .vidioc_g_frequency         = vidioc_g_frequency,
1577         .vidioc_s_frequency         = vidioc_s_frequency,
1578 #ifdef CONFIG_VIDEO_ADV_DEBUG
1579         .vidioc_g_register          = vidioc_g_register,
1580         .vidioc_s_register          = vidioc_s_register,
1581 #endif
1582         .vidioc_g_chip_ident        = vidioc_g_chip_ident,
1583 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1584         .vidiocgmbuf                = vidiocgmbuf,
1585 #endif
1586 };
1587
1588 static const struct video_device au0828_video_template = {
1589         .fops                       = &au0828_v4l_fops,
1590         .release                    = video_device_release,
1591         .ioctl_ops                  = &video_ioctl_ops,
1592         .minor                      = -1,
1593         .tvnorms                    = V4L2_STD_NTSC_M,
1594         .current_norm               = V4L2_STD_NTSC_M,
1595 };
1596
1597 /**************************************************************************/
1598
1599 int au0828_analog_register(struct au0828_dev *dev,
1600                            struct usb_interface *interface)
1601 {
1602         int retval = -ENOMEM;
1603         struct usb_host_interface *iface_desc;
1604         struct usb_endpoint_descriptor *endpoint;
1605         int i;
1606
1607         dprintk(1, "au0828_analog_register called!\n");
1608
1609         /* set au0828 usb interface0 to as5 */
1610         retval = usb_set_interface(dev->usbdev,
1611                         interface->cur_altsetting->desc.bInterfaceNumber, 5);
1612         if (retval != 0) {
1613                 printk(KERN_INFO "Failure setting usb interface0 to as5\n");
1614                 return retval;
1615         }
1616
1617         /* Figure out which endpoint has the isoc interface */
1618         iface_desc = interface->cur_altsetting;
1619         for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
1620                 endpoint = &iface_desc->endpoint[i].desc;
1621                 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1622                      == USB_DIR_IN) &&
1623                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1624                      == USB_ENDPOINT_XFER_ISOC)) {
1625
1626                         /* we find our isoc in endpoint */
1627                         u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
1628                         dev->max_pkt_size = (tmp & 0x07ff) *
1629                                 (((tmp & 0x1800) >> 11) + 1);
1630                         dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
1631                 }
1632         }
1633         if (!(dev->isoc_in_endpointaddr)) {
1634                 printk(KERN_INFO "Could not locate isoc endpoint\n");
1635                 kfree(dev);
1636                 return -ENODEV;
1637         }
1638
1639         init_waitqueue_head(&dev->open);
1640         spin_lock_init(&dev->slock);
1641         mutex_init(&dev->lock);
1642
1643         INIT_LIST_HEAD(&dev->vidq.active);
1644         INIT_LIST_HEAD(&dev->vidq.queued);
1645
1646         dev->width = NTSC_STD_W;
1647         dev->height = NTSC_STD_H;
1648         dev->field_size = dev->width * dev->height;
1649         dev->frame_size = dev->field_size << 1;
1650         dev->bytesperline = dev->width << 1;
1651         dev->ctrl_ainput = 0;
1652
1653         /* allocate and fill v4l2 video struct */
1654         dev->vdev = video_device_alloc();
1655         if (NULL == dev->vdev) {
1656                 dprintk(1, "Can't allocate video_device.\n");
1657                 return -ENOMEM;
1658         }
1659
1660 #ifdef VBI_IS_WORKING
1661         dev->vbi_dev = video_device_alloc();
1662         if (NULL == dev->vbi_dev) {
1663                 dprintk(1, "Can't allocate vbi_device.\n");
1664                 kfree(dev->vdev);
1665                 return -ENOMEM;
1666         }
1667 #endif
1668
1669         /* Fill the video capture device struct */
1670         *dev->vdev = au0828_video_template;
1671         dev->vdev->parent = &dev->usbdev->dev;
1672         strcpy(dev->vdev->name, "au0828a video");
1673
1674 #ifdef VBI_IS_WORKING
1675         /* Setup the VBI device */
1676         *dev->vbi_dev = au0828_video_template;
1677         dev->vbi_dev->parent = &dev->usbdev->dev;
1678         strcpy(dev->vbi_dev->name, "au0828a vbi");
1679 #endif
1680
1681         list_add_tail(&dev->au0828list, &au0828_devlist);
1682
1683         /* Register the v4l2 device */
1684         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1);
1685         if (retval != 0) {
1686                 dprintk(1, "unable to register video device (error = %d).\n",
1687                         retval);
1688                 list_del(&dev->au0828list);
1689                 video_device_release(dev->vdev);
1690                 return -ENODEV;
1691         }
1692
1693 #ifdef VBI_IS_WORKING
1694         /* Register the vbi device */
1695         retval = video_register_device(dev->vbi_dev, VFL_TYPE_VBI, -1);
1696         if (retval != 0) {
1697                 dprintk(1, "unable to register vbi device (error = %d).\n",
1698                         retval);
1699                 list_del(&dev->au0828list);
1700                 video_device_release(dev->vbi_dev);
1701                 video_device_release(dev->vdev);
1702                 return -ENODEV;
1703         }
1704 #endif
1705
1706         dprintk(1, "%s completed!\n", __func__);
1707
1708         return 0;
1709 }
1710