drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@infradead.org>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  10                 by Luca Risolia <luca.risolia@studio.unibo.it>
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/list.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/bitmap.h>
  32 #include <linux/usb.h>
  33 #include <linux/i2c.h>
  34 #include <linux/version.h>
  35 #include <linux/mm.h>
  36 #include <linux/mutex.h>
  37
  38 #include "em28xx.h"
  39 #include <media/v4l2-common.h>
  40 #include <media/msp3400.h>
  41 #include <media/tuner.h>
  42
  43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  44                       "Markus Rechberger <mrechberger@gmail.com>, " \
  45                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  46                       "Sascha Sommer <saschasommer@freenet.de>"
  47
  48 #define DRIVER_NAME         "em28xx"
  49 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  50 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
  51
  52 #define em28xx_videodbg(fmt, arg...) do {\
  53         if (video_debug) \
  54                 printk(KERN_INFO "%s %s :"fmt, \
  55                          dev->name, __func__ , ##arg); } while (0)
  56
  57 static unsigned int isoc_debug;
  58 module_param(isoc_debug, int, 0644);
  59 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  60
  61 #define em28xx_isocdbg(fmt, arg...) do {\
  62         if (isoc_debug) \
  63                 printk(KERN_INFO "%s %s :"fmt, \
  64                          dev->name, __func__ , ##arg); } while (0)
  65
  66 MODULE_AUTHOR(DRIVER_AUTHOR);
  67 MODULE_DESCRIPTION(DRIVER_DESC);
  68 MODULE_LICENSE("GPL");
  69
  70 static LIST_HEAD(em28xx_devlist);
  71
  72 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  73 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  74 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  75 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  76
  77 module_param_array(card,  int, NULL, 0444);
  78 module_param_array(video_nr, int, NULL, 0444);
  79 module_param_array(vbi_nr, int, NULL, 0444);
  80 module_param_array(radio_nr, int, NULL, 0444);
  81 MODULE_PARM_DESC(card,     "card type");
  82 MODULE_PARM_DESC(video_nr, "video device numbers");
  83 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  84 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  85
  86 static unsigned int video_debug;
  87 module_param(video_debug,int,0644);
  88 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  89
  90 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  91 static unsigned long em28xx_devused;
  92
  93 /* supported controls */
  94 /* Common to all boards */
  95 static struct v4l2_queryctrl em28xx_qctrl[] = {
  96         {
  97                 .id = V4L2_CID_AUDIO_VOLUME,
  98                 .type = V4L2_CTRL_TYPE_INTEGER,
  99                 .name = "Volume",
 100                 .minimum = 0x0,
 101                 .maximum = 0x1f,
 102                 .step = 0x1,
 103                 .default_value = 0x1f,
 104                 .flags = 0,
 105         },{
 106                 .id = V4L2_CID_AUDIO_MUTE,
 107                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 108                 .name = "Mute",
 109                 .minimum = 0,
 110                 .maximum = 1,
 111                 .step = 1,
 112                 .default_value = 1,
 113                 .flags = 0,
 114         }
 115 };
 116
 117 static struct usb_driver em28xx_usb_driver;
 118
 119 /* ------------------------------------------------------------------
 120         DMA and thread functions
 121    ------------------------------------------------------------------*/
 122
 123 /*
 124  * Announces that a buffer were filled and request the next
 125  */
 126 static inline void buffer_filled(struct em28xx *dev,
 127                                   struct em28xx_dmaqueue *dma_q,
 128                                   struct em28xx_buffer *buf)
 129 {
 130         /* Advice that buffer was filled */
 131         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 132         buf->vb.state = VIDEOBUF_DONE;
 133         buf->vb.field_count++;
 134         do_gettimeofday(&buf->vb.ts);
 135
 136         dev->isoc_ctl.buf = NULL;
 137
 138         list_del(&buf->vb.queue);
 139         wake_up(&buf->vb.done);
 140 }
 141
 142 /*
 143  * Identify the buffer header type and properly handles
 144  */
 145 static void em28xx_copy_video(struct em28xx *dev,
 146                               struct em28xx_dmaqueue  *dma_q,
 147                               struct em28xx_buffer *buf,
 148                               unsigned char *p,
 149                               unsigned char *outp, unsigned long len)
 150 {
 151         void *fieldstart, *startwrite, *startread;
 152         int  linesdone, currlinedone, offset, lencopy, remain;
 153         int bytesperline = dev->width << 1;
 154
 155         if (dma_q->pos + len > buf->vb.size)
 156                 len = buf->vb.size - dma_q->pos;
 157
 158         if (p[0] != 0x88 && p[0] != 0x22) {
 159                 em28xx_isocdbg("frame is not complete\n");
 160                 len += 4;
 161         } else
 162                 p += 4;
 163
 164         startread = p;
 165         remain = len;
 166
 167         /* Interlaces frame */
 168         if (buf->top_field)
 169                 fieldstart = outp;
 170         else
 171                 fieldstart = outp + bytesperline;
 172
 173         linesdone = dma_q->pos / bytesperline;
 174         currlinedone = dma_q->pos % bytesperline;
 175         offset = linesdone * bytesperline * 2 + currlinedone;
 176         startwrite = fieldstart + offset;
 177         lencopy = bytesperline - currlinedone;
 178         lencopy = lencopy > remain ? remain : lencopy;
 179
 180         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 181                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 182                                ((char *)startwrite + lencopy) -
 183                                ((char *)outp + buf->vb.size));
 184                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 185         }
 186         if (lencopy <= 0)
 187                 return;
 188         memcpy(startwrite, startread, lencopy);
 189
 190         remain -= lencopy;
 191
 192         while (remain > 0) {
 193                 startwrite += lencopy + bytesperline;
 194                 startread += lencopy;
 195                 if (bytesperline > remain)
 196                         lencopy = remain;
 197                 else
 198                         lencopy = bytesperline;
 199
 200                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 201                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 202                                        ((char *)startwrite + lencopy) -
 203                                        ((char *)outp + buf->vb.size));
 204                         lencopy = remain = (char *)outp + buf->vb.size -
 205                                            (char *)startwrite;
 206                 }
 207                 if (lencopy <= 0)
 208                         break;
 209
 210                 memcpy(startwrite, startread, lencopy);
 211
 212                 remain -= lencopy;
 213         }
 214
 215         dma_q->pos += len;
 216 }
 217
 218 static inline void print_err_status(struct em28xx *dev,
 219                                      int packet, int status)
 220 {
 221         char *errmsg = "Unknown";
 222
 223         switch (status) {
 224         case -ENOENT:
 225                 errmsg = "unlinked synchronuously";
 226                 break;
 227         case -ECONNRESET:
 228                 errmsg = "unlinked asynchronuously";
 229                 break;
 230         case -ENOSR:
 231                 errmsg = "Buffer error (overrun)";
 232                 break;
 233         case -EPIPE:
 234                 errmsg = "Stalled (device not responding)";
 235                 break;
 236         case -EOVERFLOW:
 237                 errmsg = "Babble (bad cable?)";
 238                 break;
 239         case -EPROTO:
 240                 errmsg = "Bit-stuff error (bad cable?)";
 241                 break;
 242         case -EILSEQ:
 243                 errmsg = "CRC/Timeout (could be anything)";
 244                 break;
 245         case -ETIME:
 246                 errmsg = "Device does not respond";
 247                 break;
 248         }
 249         if (packet < 0) {
 250                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 251         } else {
 252                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 253                                packet, status, errmsg);
 254         }
 255 }
 256
 257 /*
 258  * video-buf generic routine to get the next available buffer
 259  */
 260 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 261                                           struct em28xx_buffer **buf)
 262 {
 263         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 264         char *outp;
 265
 266         if (list_empty(&dma_q->active)) {
 267                 em28xx_isocdbg("No active queue to serve\n");
 268                 dev->isoc_ctl.buf = NULL;
 269                 *buf = NULL;
 270                 return;
 271         }
 272
 273         /* Get the next buffer */
 274         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 275
 276         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 277         outp = videobuf_to_vmalloc(&(*buf)->vb);
 278         memset(outp, 0, (*buf)->vb.size);
 279
 280         dev->isoc_ctl.buf = *buf;
 281
 282         return;
 283 }
 284
 285 /*
 286  * Controls the isoc copy of each urb packet
 287  */
 288 static inline int em28xx_isoc_copy(struct urb *urb)
 289 {
 290         struct em28xx_buffer    *buf;
 291         struct em28xx_dmaqueue  *dma_q = urb->context;
 292         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 293         unsigned char *outp = NULL;
 294         int i, len = 0, rc = 1;
 295         unsigned char *p;
 296
 297         if (!dev)
 298                 return 0;
 299
 300         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 301                 return 0;
 302
 303         if (urb->status < 0) {
 304                 print_err_status(dev, -1, urb->status);
 305                 if (urb->status == -ENOENT)
 306                         return 0;
 307         }
 308
 309         buf = dev->isoc_ctl.buf;
 310         if (buf != NULL)
 311                 outp = videobuf_to_vmalloc(&buf->vb);
 312
 313         for (i = 0; i < urb->number_of_packets; i++) {
 314                 int status = urb->iso_frame_desc[i].status;
 315
 316                 if (status < 0) {
 317                         print_err_status(dev, i, status);
 318                         if (urb->iso_frame_desc[i].status != -EPROTO)
 319                                 continue;
 320                 }
 321
 322                 len = urb->iso_frame_desc[i].actual_length - 4;
 323
 324                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 325                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 326                         continue;
 327                 }
 328                 if (urb->iso_frame_desc[i].actual_length >
 329                                                 dev->max_pkt_size) {
 330                         em28xx_isocdbg("packet bigger than packet size");
 331                         continue;
 332                 }
 333
 334                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 335
 336                 /* FIXME: incomplete buffer checks where removed to make
 337                    logic simpler. Impacts of those changes should be evaluated
 338                  */
 339                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 340                         em28xx_isocdbg("VBI HEADER!!!\n");
 341                         /* FIXME: Should add vbi copy */
 342                         continue;
 343                 }
 344                 if (p[0] == 0x22 && p[1] == 0x5a) {
 345                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 346                                        len, (p[2] & 1)? "odd" : "even");
 347
 348                         if (!(p[2] & 1)) {
 349                                 if (buf != NULL)
 350                                         buffer_filled(dev, dma_q, buf);
 351                                 get_next_buf(dma_q, &buf);
 352                                 if (buf == NULL)
 353                                         outp = NULL;
 354                                 else
 355                                         outp = videobuf_to_vmalloc(&buf->vb);
 356                         }
 357
 358                         if (buf != NULL) {
 359                                 if (p[2] & 1)
 360                                         buf->top_field = 0;
 361                                 else
 362                                         buf->top_field = 1;
 363                         }
 364
 365                         dma_q->pos = 0;
 366                 }
 367                 if (buf != NULL)
 368                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 369         }
 370         return rc;
 371 }
 372
 373 /* ------------------------------------------------------------------
 374         URB control
 375    ------------------------------------------------------------------*/
 376
 377 /*
 378  * IRQ callback, called by URB callback
 379  */
 380 static void em28xx_irq_callback(struct urb *urb)
 381 {
 382         struct em28xx_dmaqueue  *dma_q = urb->context;
 383         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 384         int rc, i;
 385
 386         /* Copy data from URB */
 387         spin_lock(&dev->slock);
 388         rc = em28xx_isoc_copy(urb);
 389         spin_unlock(&dev->slock);
 390
 391         /* Reset urb buffers */
 392         for (i = 0; i < urb->number_of_packets; i++) {
 393                 urb->iso_frame_desc[i].status = 0;
 394                 urb->iso_frame_desc[i].actual_length = 0;
 395         }
 396         urb->status = 0;
 397
 398         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
 399         if (urb->status) {
 400                 em28xx_err("urb resubmit failed (error=%i)\n",
 401                         urb->status);
 402         }
 403 }
 404
 405 /*
 406  * Stop and Deallocate URBs
 407  */
 408 static void em28xx_uninit_isoc(struct em28xx *dev)
 409 {
 410         struct urb *urb;
 411         int i;
 412
 413         em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
 414
 415         dev->isoc_ctl.nfields = -1;
 416         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 417                 urb = dev->isoc_ctl.urb[i];
 418                 if (urb) {
 419                         usb_kill_urb(urb);
 420                         usb_unlink_urb(urb);
 421                         if (dev->isoc_ctl.transfer_buffer[i]) {
 422                                 usb_buffer_free(dev->udev,
 423                                                 urb->transfer_buffer_length,
 424                                                 dev->isoc_ctl.transfer_buffer[i],
 425                                                 urb->transfer_dma);
 426                         }
 427                         usb_free_urb(urb);
 428                         dev->isoc_ctl.urb[i] = NULL;
 429                 }
 430                 dev->isoc_ctl.transfer_buffer[i] = NULL;
 431         }
 432
 433         kfree(dev->isoc_ctl.urb);
 434         kfree(dev->isoc_ctl.transfer_buffer);
 435         dev->isoc_ctl.urb = NULL;
 436         dev->isoc_ctl.transfer_buffer = NULL;
 437
 438         dev->isoc_ctl.num_bufs = 0;
 439
 440         em28xx_capture_start(dev, 0);
 441 }
 442
 443 /*
 444  * Allocate URBs and start IRQ
 445  */
 446 static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets,
 447                                int num_bufs)
 448 {
 449         struct em28xx_dmaqueue *dma_q = &dev->vidq;
 450         int i;
 451         int sb_size, pipe;
 452         struct urb *urb;
 453         int j, k;
 454
 455         em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
 456
 457         /* De-allocates all pending stuff */
 458         em28xx_uninit_isoc(dev);
 459
 460         dev->isoc_ctl.num_bufs = num_bufs;
 461
 462         dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs,  GFP_KERNEL);
 463         if (!dev->isoc_ctl.urb) {
 464                 em28xx_errdev("cannot alloc memory for usb buffers\n");
 465                 return -ENOMEM;
 466         }
 467
 468         dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
 469                                               GFP_KERNEL);
 470         if (!dev->isoc_ctl.urb) {
 471                 em28xx_errdev("cannot allocate memory for usbtransfer\n");
 472                 kfree(dev->isoc_ctl.urb);
 473                 return -ENOMEM;
 474         }
 475
 476         dev->isoc_ctl.max_pkt_size = dev->max_pkt_size;
 477         dev->isoc_ctl.buf = NULL;
 478
 479         sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
 480
 481         /* allocate urbs and transfer buffers */
 482         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 483                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
 484                 if (!urb) {
 485                         em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
 486                         em28xx_uninit_isoc(dev);
 487                         return -ENOMEM;
 488                 }
 489                 dev->isoc_ctl.urb[i] = urb;
 490
 491                 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
 492                         sb_size, GFP_KERNEL, &urb->transfer_dma);
 493                 if (!dev->isoc_ctl.transfer_buffer[i]) {
 494                         em28xx_err("unable to allocate %i bytes for transfer"
 495                                         " buffer %i%s\n",
 496                                         sb_size, i,
 497                                         in_interrupt()?" while in int":"");
 498                         em28xx_uninit_isoc(dev);
 499                         return -ENOMEM;
 500                 }
 501                 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
 502
 503                 /* FIXME: this is a hack - should be
 504                         'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
 505                         should also be using 'desc.bInterval'
 506                  */
 507                 pipe = usb_rcvisocpipe(dev->udev, 0x82);
 508                 usb_fill_int_urb(urb, dev->udev, pipe,
 509                                  dev->isoc_ctl.transfer_buffer[i], sb_size,
 510                                  em28xx_irq_callback, dma_q, 1);
 511
 512                 urb->number_of_packets = max_packets;
 513                 urb->transfer_flags = URB_ISO_ASAP;
 514
 515                 k = 0;
 516                 for (j = 0; j < max_packets; j++) {
 517                         urb->iso_frame_desc[j].offset = k;
 518                         urb->iso_frame_desc[j].length =
 519                                                 dev->isoc_ctl.max_pkt_size;
 520                         k += dev->isoc_ctl.max_pkt_size;
 521                 }
 522         }
 523
 524         return 0;
 525 }
 526
 527 static int em28xx_start_thread(struct em28xx_dmaqueue  *dma_q)
 528 {
 529         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 530         int i, rc = 0;
 531
 532         em28xx_videodbg("Called em28xx_start_thread\n");
 533
 534         init_waitqueue_head(&dma_q->wq);
 535
 536         em28xx_capture_start(dev, 1);
 537
 538         /* submit urbs and enables IRQ */
 539         for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
 540                 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
 541                 if (rc) {
 542                         em28xx_err("submit of urb %i failed (error=%i)\n", i,
 543                                    rc);
 544                         em28xx_uninit_isoc(dev);
 545                         return rc;
 546                 }
 547         }
 548
 549         if (rc < 0)
 550                 return rc;
 551
 552         return 0;
 553 }
 554
 555 /* ------------------------------------------------------------------
 556         Videobuf operations
 557    ------------------------------------------------------------------*/
 558
 559 static int
 560 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 561 {
 562         struct em28xx_fh *fh = vq->priv_data;
 563
 564         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 565         if (0 == *count)
 566                 *count = EM28XX_DEF_BUF;
 567
 568         if (*count < EM28XX_MIN_BUF)
 569                 *count = EM28XX_MIN_BUF;
 570
 571         return 0;
 572 }
 573
 574 /* This is called *without* dev->slock held; please keep it that way */
 575 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 576 {
 577         struct em28xx_fh     *fh  = vq->priv_data;
 578         struct em28xx        *dev = fh->dev;
 579         unsigned long flags = 0;
 580         if (in_interrupt())
 581                 BUG();
 582
 583         /* We used to wait for the buffer to finish here, but this didn't work
 584            because, as we were keeping the state as VIDEOBUF_QUEUED,
 585            videobuf_queue_cancel marked it as finished for us.
 586            (Also, it could wedge forever if the hardware was misconfigured.)
 587
 588            This should be safe; by the time we get here, the buffer isn't
 589            queued anymore. If we ever start marking the buffers as
 590            VIDEOBUF_ACTIVE, it won't be, though.
 591         */
 592         spin_lock_irqsave(&dev->slock, flags);
 593         if (dev->isoc_ctl.buf == buf)
 594                 dev->isoc_ctl.buf = NULL;
 595         spin_unlock_irqrestore(&dev->slock, flags);
 596
 597         videobuf_vmalloc_free(&buf->vb);
 598         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 599 }
 600
 601 static int
 602 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 603                                                 enum v4l2_field field)
 604 {
 605         struct em28xx_fh     *fh  = vq->priv_data;
 606         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 607         struct em28xx        *dev = fh->dev;
 608         struct em28xx_dmaqueue *vidq = &dev->vidq;
 609         int                  rc = 0, urb_init = 0;
 610
 611         /* FIXME: It assumes depth = 16 */
 612         /* The only currently supported format is 16 bits/pixel */
 613         buf->vb.size = 16 * dev->width * dev->height >> 3;
 614
 615         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 616                 return -EINVAL;
 617
 618         buf->vb.width  = dev->width;
 619         buf->vb.height = dev->height;
 620         buf->vb.field  = field;
 621
 622         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 623                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 624                 if (rc < 0)
 625                         goto fail;
 626         }
 627
 628         if (!dev->isoc_ctl.num_bufs)
 629                 urb_init = 1;
 630
 631         if (urb_init) {
 632                 rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS,
 633                                          EM28XX_NUM_BUFS);
 634                 if (rc < 0)
 635                         goto fail;
 636
 637                 rc = em28xx_start_thread(vidq);
 638                 if (rc < 0)
 639                         goto fail;
 640         }
 641
 642         buf->vb.state = VIDEOBUF_PREPARED;
 643         return 0;
 644
 645 fail:
 646         free_buffer(vq, buf);
 647         return rc;
 648 }
 649
 650 static void
 651 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 652 {
 653         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 654         struct em28xx_fh        *fh      = vq->priv_data;
 655         struct em28xx           *dev     = fh->dev;
 656         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 657
 658         buf->vb.state = VIDEOBUF_QUEUED;
 659         list_add_tail(&buf->vb.queue, &vidq->active);
 660
 661 }
 662
 663 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 664 {
 665         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 666         struct em28xx_fh       *fh   = vq->priv_data;
 667         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 668
 669         em28xx_isocdbg("em28xx: called buffer_release\n");
 670
 671         free_buffer(vq, buf);
 672 }
 673
 674 static struct videobuf_queue_ops em28xx_video_qops = {
 675         .buf_setup      = buffer_setup,
 676         .buf_prepare    = buffer_prepare,
 677         .buf_queue      = buffer_queue,
 678         .buf_release    = buffer_release,
 679 };
 680
 681 /*********************  v4l2 interface  ******************************************/
 682
 683 /*
 684  * em28xx_config()
 685  * inits registers with sane defaults
 686  */
 687 static int em28xx_config(struct em28xx *dev)
 688 {
 689
 690         /* Sets I2C speed to 100 KHz */
 691         if (!dev->is_em2800)
 692                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 693
 694         /* enable vbi capturing */
 695
 696 /*      em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
 697 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 698         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 699
 700         dev->mute = 1;          /* maybe not the right place... */
 701         dev->volume = 0x1f;
 702
 703         em28xx_outfmt_set_yuv422(dev);
 704         em28xx_colorlevels_set_default(dev);
 705         em28xx_compression_disable(dev);
 706
 707         return 0;
 708 }
 709
 710 /*
 711  * em28xx_config_i2c()
 712  * configure i2c attached devices
 713  */
 714 static void em28xx_config_i2c(struct em28xx *dev)
 715 {
 716         struct v4l2_routing route;
 717
 718         route.input = INPUT(dev->ctl_input)->vmux;
 719         route.output = 0;
 720         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 721         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 722         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 723 }
 724
 725 static void video_mux(struct em28xx *dev, int index)
 726 {
 727         struct v4l2_routing route;
 728
 729         route.input = INPUT(index)->vmux;
 730         route.output = 0;
 731         dev->ctl_input = index;
 732         dev->ctl_ainput = INPUT(index)->amux;
 733
 734         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 735
 736         if (dev->has_msp34xx) {
 737                 if (dev->i2s_speed)
 738                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 739                 route.input = dev->ctl_ainput;
 740                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 741                 /* Note: this is msp3400 specific */
 742                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
 743         }
 744
 745         em28xx_audio_analog_set(dev);
 746 }
 747
 748 /* Usage lock check functions */
 749 static int res_get(struct em28xx_fh *fh)
 750 {
 751         struct em28xx    *dev = fh->dev;
 752         int              rc   = 0;
 753
 754         /* This instance already has stream_on */
 755         if (fh->stream_on)
 756                 return rc;
 757
 758         if (dev->stream_on)
 759                 return -EINVAL;
 760
 761         mutex_lock(&dev->lock);
 762         dev->stream_on = 1;
 763         fh->stream_on  = 1;
 764         mutex_unlock(&dev->lock);
 765         return rc;
 766 }
 767
 768 static int res_check(struct em28xx_fh *fh)
 769 {
 770         return (fh->stream_on);
 771 }
 772
 773 static void res_free(struct em28xx_fh *fh)
 774 {
 775         struct em28xx    *dev = fh->dev;
 776
 777         mutex_lock(&dev->lock);
 778         fh->stream_on = 0;
 779         dev->stream_on = 0;
 780         mutex_unlock(&dev->lock);
 781 }
 782
 783 /*
 784  * em28xx_get_ctrl()
 785  * return the current saturation, brightness or contrast, mute state
 786  */
 787 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 788 {
 789         switch (ctrl->id) {
 790         case V4L2_CID_AUDIO_MUTE:
 791                 ctrl->value = dev->mute;
 792                 return 0;
 793         case V4L2_CID_AUDIO_VOLUME:
 794                 ctrl->value = dev->volume;
 795                 return 0;
 796         default:
 797                 return -EINVAL;
 798         }
 799 }
 800
 801 /*
 802  * em28xx_set_ctrl()
 803  * mute or set new saturation, brightness or contrast
 804  */
 805 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 806 {
 807         switch (ctrl->id) {
 808         case V4L2_CID_AUDIO_MUTE:
 809                 if (ctrl->value != dev->mute) {
 810                         dev->mute = ctrl->value;
 811                         return em28xx_audio_analog_set(dev);
 812                 }
 813                 return 0;
 814         case V4L2_CID_AUDIO_VOLUME:
 815                 dev->volume = ctrl->value;
 816                 return em28xx_audio_analog_set(dev);
 817         default:
 818                 return -EINVAL;
 819         }
 820 }
 821
 822 static int check_dev(struct em28xx *dev)
 823 {
 824         if (dev->state & DEV_DISCONNECTED) {
 825                 em28xx_errdev("v4l2 ioctl: device not present\n");
 826                 return -ENODEV;
 827         }
 828
 829         if (dev->state & DEV_MISCONFIGURED) {
 830                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 831                               "close and open it again\n");
 832                 return -EIO;
 833         }
 834         return 0;
 835 }
 836
 837 static void get_scale(struct em28xx *dev,
 838                         unsigned int width, unsigned int height,
 839                         unsigned int *hscale, unsigned int *vscale)
 840 {
 841         unsigned int          maxw   = norm_maxw(dev);
 842         unsigned int          maxh   = norm_maxh(dev);
 843
 844         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 845         if (*hscale >= 0x4000)
 846                 *hscale = 0x3fff;
 847
 848         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 849         if (*vscale >= 0x4000)
 850                 *vscale = 0x3fff;
 851 }
 852
 853 /* ------------------------------------------------------------------
 854         IOCTL vidioc handling
 855    ------------------------------------------------------------------*/
 856
 857 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 858                                         struct v4l2_format *f)
 859 {
 860         struct em28xx_fh      *fh  = priv;
 861         struct em28xx         *dev = fh->dev;
 862
 863         mutex_lock(&dev->lock);
 864
 865         f->fmt.pix.width = dev->width;
 866         f->fmt.pix.height = dev->height;
 867         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 868         f->fmt.pix.bytesperline = dev->width * 2;
 869         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 870         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 871
 872         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 873         f->fmt.pix.field = dev->interlaced ?
 874                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 875
 876         mutex_unlock(&dev->lock);
 877         return 0;
 878 }
 879
 880 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 881                         struct v4l2_format *f)
 882 {
 883         struct em28xx_fh      *fh    = priv;
 884         struct em28xx         *dev   = fh->dev;
 885         int                   width  = f->fmt.pix.width;
 886         int                   height = f->fmt.pix.height;
 887         unsigned int          maxw   = norm_maxw(dev);
 888         unsigned int          maxh   = norm_maxh(dev);
 889         unsigned int          hscale, vscale;
 890
 891         /* width must even because of the YUYV format
 892            height must be even because of interlacing */
 893         height &= 0xfffe;
 894         width &= 0xfffe;
 895
 896         if (height < 32)
 897                 height = 32;
 898         if (height > maxh)
 899                 height = maxh;
 900         if (width < 48)
 901                 width = 48;
 902         if (width > maxw)
 903                 width = maxw;
 904
 905         mutex_lock(&dev->lock);
 906
 907         if (dev->is_em2800) {
 908                 /* the em2800 can only scale down to 50% */
 909                 if (height % (maxh / 2))
 910                         height = maxh;
 911                 if (width % (maxw / 2))
 912                         width = maxw;
 913                 /* according to empiatech support */
 914                 /* the MaxPacketSize is to small to support */
 915                 /* framesizes larger than 640x480 @ 30 fps */
 916                 /* or 640x576 @ 25 fps. As this would cut */
 917                 /* of a part of the image we prefer */
 918                 /* 360x576 or 360x480 for now */
 919                 if (width == maxw && height == maxh)
 920                         width /= 2;
 921         }
 922
 923         get_scale(dev, width, height, &hscale, &vscale);
 924
 925         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 926         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 927
 928         f->fmt.pix.width = width;
 929         f->fmt.pix.height = height;
 930         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 931         f->fmt.pix.bytesperline = width * 2;
 932         f->fmt.pix.sizeimage = width * 2 * height;
 933         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 934         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 935
 936         mutex_unlock(&dev->lock);
 937         return 0;
 938 }
 939
 940 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 941                         struct v4l2_format *f)
 942 {
 943         struct em28xx_fh      *fh  = priv;
 944         struct em28xx         *dev = fh->dev;
 945         int                   rc;
 946
 947         rc = check_dev(dev);
 948         if (rc < 0)
 949                 return rc;
 950
 951         vidioc_try_fmt_cap(file, priv, f);
 952
 953         mutex_lock(&dev->lock);
 954
 955         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 956                 em28xx_errdev("%s queue busy\n", __func__);
 957                 rc = -EBUSY;
 958                 goto out;
 959         }
 960
 961         if (dev->stream_on && !fh->stream_on) {
 962                 em28xx_errdev("%s device in use by another fh\n", __func__);
 963                 rc = -EBUSY;
 964                 goto out;
 965         }
 966
 967         /* set new image size */
 968         dev->width = f->fmt.pix.width;
 969         dev->height = f->fmt.pix.height;
 970         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 971
 972         em28xx_set_alternate(dev);
 973         em28xx_resolution_set(dev);
 974
 975         rc = 0;
 976
 977 out:
 978         mutex_unlock(&dev->lock);
 979         return rc;
 980 }
 981
 982 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
 983 {
 984         struct em28xx_fh   *fh  = priv;
 985         struct em28xx      *dev = fh->dev;
 986         struct v4l2_format f;
 987         int                rc;
 988
 989         rc = check_dev(dev);
 990         if (rc < 0)
 991                 return rc;
 992
 993         mutex_lock(&dev->lock);
 994         dev->norm = *norm;
 995         mutex_unlock(&dev->lock);
 996
 997         /* Adjusts width/height, if needed */
 998         f.fmt.pix.width = dev->width;
 999         f.fmt.pix.height = dev->height;
1000         vidioc_try_fmt_cap(file, priv, &f);
1001
1002         mutex_lock(&dev->lock);
1003
1004         /* set new image size */
1005         dev->width = f.fmt.pix.width;
1006         dev->height = f.fmt.pix.height;
1007         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1008
1009         em28xx_resolution_set(dev);
1010         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
1011
1012         mutex_unlock(&dev->lock);
1013         return 0;
1014 }
1015
1016 static const char *iname[] = {
1017         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1018         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1019         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1020         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1021         [EM28XX_VMUX_SVIDEO]     = "S-Video",
1022         [EM28XX_VMUX_TELEVISION] = "Television",
1023         [EM28XX_VMUX_CABLE]      = "Cable TV",
1024         [EM28XX_VMUX_DVB]        = "DVB",
1025         [EM28XX_VMUX_DEBUG]      = "for debug only",
1026 };
1027
1028 static int vidioc_enum_input(struct file *file, void *priv,
1029                                 struct v4l2_input *i)
1030 {
1031         struct em28xx_fh   *fh  = priv;
1032         struct em28xx      *dev = fh->dev;
1033         unsigned int       n;
1034
1035         n = i->index;
1036         if (n >= MAX_EM28XX_INPUT)
1037                 return -EINVAL;
1038         if (0 == INPUT(n)->type)
1039                 return -EINVAL;
1040
1041         i->index = n;
1042         i->type = V4L2_INPUT_TYPE_CAMERA;
1043
1044         strcpy(i->name, iname[INPUT(n)->type]);
1045
1046         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1047                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1048                 i->type = V4L2_INPUT_TYPE_TUNER;
1049
1050         i->std = dev->vdev->tvnorms;
1051
1052         return 0;
1053 }
1054
1055 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1056 {
1057         struct em28xx_fh   *fh  = priv;
1058         struct em28xx      *dev = fh->dev;
1059
1060         *i = dev->ctl_input;
1061
1062         return 0;
1063 }
1064
1065 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1066 {
1067         struct em28xx_fh   *fh  = priv;
1068         struct em28xx      *dev = fh->dev;
1069         int                rc;
1070
1071         rc = check_dev(dev);
1072         if (rc < 0)
1073                 return rc;
1074
1075         if (i >= MAX_EM28XX_INPUT)
1076                 return -EINVAL;
1077         if (0 == INPUT(i)->type)
1078                 return -EINVAL;
1079
1080         mutex_lock(&dev->lock);
1081
1082         video_mux(dev, i);
1083
1084         mutex_unlock(&dev->lock);
1085         return 0;
1086 }
1087
1088 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1089 {
1090         struct em28xx_fh   *fh    = priv;
1091         struct em28xx      *dev   = fh->dev;
1092         unsigned int        index = a->index;
1093
1094         if (a->index > 1)
1095                 return -EINVAL;
1096
1097         index = dev->ctl_ainput;
1098
1099         if (index == 0) {
1100                 strcpy(a->name, "Television");
1101         } else {
1102                 strcpy(a->name, "Line In");
1103         }
1104         a->capability = V4L2_AUDCAP_STEREO;
1105         a->index = index;
1106
1107         return 0;
1108 }
1109
1110 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1111 {
1112         struct em28xx_fh   *fh  = priv;
1113         struct em28xx      *dev = fh->dev;
1114
1115         if (a->index != dev->ctl_ainput)
1116                 return -EINVAL;
1117
1118         return 0;
1119 }
1120
1121 static int vidioc_queryctrl(struct file *file, void *priv,
1122                                 struct v4l2_queryctrl *qc)
1123 {
1124         struct em28xx_fh      *fh  = priv;
1125         struct em28xx         *dev = fh->dev;
1126         int                   id  = qc->id;
1127         int                   i;
1128         int                   rc;
1129
1130         rc = check_dev(dev);
1131         if (rc < 0)
1132                 return rc;
1133
1134         memset(qc, 0, sizeof(*qc));
1135
1136         qc->id = id;
1137
1138         if (!dev->has_msp34xx) {
1139                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1140                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1141                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1142                                 return 0;
1143                         }
1144                 }
1145         }
1146         mutex_lock(&dev->lock);
1147         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1148         mutex_unlock(&dev->lock);
1149
1150         if (qc->type)
1151                 return 0;
1152         else
1153                 return -EINVAL;
1154 }
1155
1156 static int vidioc_g_ctrl(struct file *file, void *priv,
1157                                 struct v4l2_control *ctrl)
1158 {
1159         struct em28xx_fh      *fh  = priv;
1160         struct em28xx         *dev = fh->dev;
1161         int                   rc;
1162
1163         rc = check_dev(dev);
1164         if (rc < 0)
1165                 return rc;
1166         mutex_lock(&dev->lock);
1167
1168         if (!dev->has_msp34xx)
1169                 rc = em28xx_get_ctrl(dev, ctrl);
1170         else
1171                 rc = -EINVAL;
1172
1173         if (rc == -EINVAL) {
1174                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1175                 rc = 0;
1176         }
1177
1178         mutex_unlock(&dev->lock);
1179         return rc;
1180 }
1181
1182 static int vidioc_s_ctrl(struct file *file, void *priv,
1183                                 struct v4l2_control *ctrl)
1184 {
1185         struct em28xx_fh      *fh  = priv;
1186         struct em28xx         *dev = fh->dev;
1187         u8                    i;
1188         int                   rc;
1189
1190         rc = check_dev(dev);
1191         if (rc < 0)
1192                 return rc;
1193
1194         mutex_lock(&dev->lock);
1195
1196         if (dev->has_msp34xx)
1197                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1198         else {
1199                 rc = 1;
1200                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1201                         if (ctrl->id == em28xx_qctrl[i].id) {
1202                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1203                                     ctrl->value > em28xx_qctrl[i].maximum) {
1204                                         rc = -ERANGE;
1205                                         break;
1206                                 }
1207
1208                                 rc = em28xx_set_ctrl(dev, ctrl);
1209                                 break;
1210                         }
1211                 }
1212         }
1213
1214         /* Control not found - try to send it to the attached devices */
1215         if (rc == 1) {
1216                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1217                 rc = 0;
1218         }
1219
1220         mutex_unlock(&dev->lock);
1221         return rc;
1222 }
1223
1224 static int vidioc_g_tuner(struct file *file, void *priv,
1225                                 struct v4l2_tuner *t)
1226 {
1227         struct em28xx_fh      *fh  = priv;
1228         struct em28xx         *dev = fh->dev;
1229         int                   rc;
1230
1231         rc = check_dev(dev);
1232         if (rc < 0)
1233                 return rc;
1234
1235         if (0 != t->index)
1236                 return -EINVAL;
1237
1238         strcpy(t->name, "Tuner");
1239
1240         mutex_lock(&dev->lock);
1241
1242         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1243
1244         mutex_unlock(&dev->lock);
1245         return 0;
1246 }
1247
1248 static int vidioc_s_tuner(struct file *file, void *priv,
1249                                 struct v4l2_tuner *t)
1250 {
1251         struct em28xx_fh      *fh  = priv;
1252         struct em28xx         *dev = fh->dev;
1253         int                   rc;
1254
1255         rc = check_dev(dev);
1256         if (rc < 0)
1257                 return rc;
1258
1259         if (0 != t->index)
1260                 return -EINVAL;
1261
1262         mutex_lock(&dev->lock);
1263
1264         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1265
1266         mutex_unlock(&dev->lock);
1267         return 0;
1268 }
1269
1270 static int vidioc_g_frequency(struct file *file, void *priv,
1271                                 struct v4l2_frequency *f)
1272 {
1273         struct em28xx_fh      *fh  = priv;
1274         struct em28xx         *dev = fh->dev;
1275
1276         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1277         f->frequency = dev->ctl_freq;
1278
1279         return 0;
1280 }
1281
1282 static int vidioc_s_frequency(struct file *file, void *priv,
1283                                 struct v4l2_frequency *f)
1284 {
1285         struct em28xx_fh      *fh  = priv;
1286         struct em28xx         *dev = fh->dev;
1287         int                   rc;
1288
1289         rc = check_dev(dev);
1290         if (rc < 0)
1291                 return rc;
1292
1293         if (0 != f->tuner)
1294                 return -EINVAL;
1295
1296         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1297                 return -EINVAL;
1298         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1299                 return -EINVAL;
1300
1301         mutex_lock(&dev->lock);
1302
1303         dev->ctl_freq = f->frequency;
1304         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1305
1306         mutex_unlock(&dev->lock);
1307         return 0;
1308 }
1309
1310 #ifdef CONFIG_VIDEO_ADV_DEBUG
1311 static int em28xx_reg_len(int reg)
1312 {
1313         switch (reg) {
1314         case AC97LSB_REG:
1315         case HSCALELOW_REG:
1316         case VSCALELOW_REG:
1317                 return 2;
1318         default:
1319                 return 1;
1320         }
1321 }
1322
1323 static int vidioc_g_register(struct file *file, void *priv,
1324                              struct v4l2_register *reg)
1325 {
1326         struct em28xx_fh      *fh  = priv;
1327         struct em28xx         *dev = fh->dev;
1328         int ret;
1329
1330         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1331                 return -EINVAL;
1332
1333         if (em28xx_reg_len(reg->reg) == 1) {
1334                 ret = em28xx_read_reg(dev, reg->reg);
1335                 if (ret < 0)
1336                         return ret;
1337
1338                 reg->val = ret;
1339         } else {
1340                 u64 val = 0;
1341                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1342                                                    reg->reg, (char *)&val, 2);
1343                 if (ret < 0)
1344                         return ret;
1345
1346                 reg->val = cpu_to_le64((__u64)val);
1347         }
1348
1349         return 0;
1350 }
1351
1352 static int vidioc_s_register(struct file *file, void *priv,
1353                              struct v4l2_register *reg)
1354 {
1355         struct em28xx_fh      *fh  = priv;
1356         struct em28xx         *dev = fh->dev;
1357         u64 buf;
1358
1359         buf = le64_to_cpu((__u64)reg->val);
1360
1361         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1362                                  em28xx_reg_len(reg->reg));
1363 }
1364 #endif
1365
1366
1367 static int vidioc_cropcap(struct file *file, void *priv,
1368                                         struct v4l2_cropcap *cc)
1369 {
1370         struct em28xx_fh      *fh  = priv;
1371         struct em28xx         *dev = fh->dev;
1372
1373         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1374                 return -EINVAL;
1375
1376         cc->bounds.left = 0;
1377         cc->bounds.top = 0;
1378         cc->bounds.width = dev->width;
1379         cc->bounds.height = dev->height;
1380         cc->defrect = cc->bounds;
1381         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1382         cc->pixelaspect.denominator = 59;
1383
1384         return 0;
1385 }
1386
1387 static int vidioc_streamon(struct file *file, void *priv,
1388                                         enum v4l2_buf_type type)
1389 {
1390         struct em28xx_fh      *fh  = priv;
1391         struct em28xx         *dev = fh->dev;
1392         int                   rc;
1393
1394         rc = check_dev(dev);
1395         if (rc < 0)
1396                 return rc;
1397
1398
1399         if (unlikely(res_get(fh) < 0))
1400                 return -EBUSY;
1401
1402         return (videobuf_streamon(&fh->vb_vidq));
1403 }
1404
1405 static int vidioc_streamoff(struct file *file, void *priv,
1406                                         enum v4l2_buf_type type)
1407 {
1408         struct em28xx_fh      *fh  = priv;
1409         struct em28xx         *dev = fh->dev;
1410         int                   rc;
1411
1412         rc = check_dev(dev);
1413         if (rc < 0)
1414                 return rc;
1415
1416         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1417                 return -EINVAL;
1418         if (type != fh->type)
1419                 return -EINVAL;
1420
1421         videobuf_streamoff(&fh->vb_vidq);
1422         res_free(fh);
1423
1424         return 0;
1425 }
1426
1427 static int vidioc_querycap(struct file *file, void  *priv,
1428                                         struct v4l2_capability *cap)
1429 {
1430         struct em28xx_fh      *fh  = priv;
1431         struct em28xx         *dev = fh->dev;
1432
1433         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1434         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1435         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1436
1437         cap->version = EM28XX_VERSION_CODE;
1438
1439         cap->capabilities =
1440                         V4L2_CAP_SLICED_VBI_CAPTURE |
1441                         V4L2_CAP_VIDEO_CAPTURE |
1442                         V4L2_CAP_AUDIO |
1443                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1444
1445         if (dev->tuner_type != TUNER_ABSENT)
1446                 cap->capabilities |= V4L2_CAP_TUNER;
1447
1448         return 0;
1449 }
1450
1451 static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
1452                                         struct v4l2_fmtdesc *fmtd)
1453 {
1454         if (fmtd->index != 0)
1455                 return -EINVAL;
1456
1457         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1458         strcpy(fmtd->description, "Packed YUY2");
1459         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1460         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1461
1462         return 0;
1463 }
1464
1465 /* Sliced VBI ioctls */
1466 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1467                                         struct v4l2_format *f)
1468 {
1469         struct em28xx_fh      *fh  = priv;
1470         struct em28xx         *dev = fh->dev;
1471         int                   rc;
1472
1473         rc = check_dev(dev);
1474         if (rc < 0)
1475                 return rc;
1476
1477         mutex_lock(&dev->lock);
1478
1479         f->fmt.sliced.service_set = 0;
1480
1481         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1482
1483         if (f->fmt.sliced.service_set == 0)
1484                 rc = -EINVAL;
1485
1486         mutex_unlock(&dev->lock);
1487         return rc;
1488 }
1489
1490 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1491                         struct v4l2_format *f)
1492 {
1493         struct em28xx_fh      *fh  = priv;
1494         struct em28xx         *dev = fh->dev;
1495         int                   rc;
1496
1497         rc = check_dev(dev);
1498         if (rc < 0)
1499                 return rc;
1500
1501         mutex_lock(&dev->lock);
1502         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1503         mutex_unlock(&dev->lock);
1504
1505         if (f->fmt.sliced.service_set == 0)
1506                 return -EINVAL;
1507
1508         return 0;
1509 }
1510
1511
1512 static int vidioc_reqbufs(struct file *file, void *priv,
1513                           struct v4l2_requestbuffers *rb)
1514 {
1515         struct em28xx_fh      *fh  = priv;
1516         struct em28xx         *dev = fh->dev;
1517         int                   rc;
1518
1519         rc = check_dev(dev);
1520         if (rc < 0)
1521                 return rc;
1522
1523         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1524 }
1525
1526 static int vidioc_querybuf(struct file *file, void *priv,
1527                            struct v4l2_buffer *b)
1528 {
1529         struct em28xx_fh      *fh  = priv;
1530         struct em28xx         *dev = fh->dev;
1531         int                   rc;
1532
1533         rc = check_dev(dev);
1534         if (rc < 0)
1535                 return rc;
1536
1537         return (videobuf_querybuf(&fh->vb_vidq, b));
1538 }
1539
1540 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1541 {
1542         struct em28xx_fh      *fh  = priv;
1543         struct em28xx         *dev = fh->dev;
1544         int                   rc;
1545
1546         rc = check_dev(dev);
1547         if (rc < 0)
1548                 return rc;
1549
1550         return (videobuf_qbuf(&fh->vb_vidq, b));
1551 }
1552
1553 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1554 {
1555         struct em28xx_fh      *fh  = priv;
1556         struct em28xx         *dev = fh->dev;
1557         int                   rc;
1558
1559         rc = check_dev(dev);
1560         if (rc < 0)
1561                 return rc;
1562
1563         return (videobuf_dqbuf(&fh->vb_vidq, b,
1564                                 file->f_flags & O_NONBLOCK));
1565 }
1566
1567 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1568 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1569 {
1570         struct em28xx_fh  *fh = priv;
1571
1572         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1573 }
1574 #endif
1575
1576
1577 /* ----------------------------------------------------------- */
1578 /* RADIO ESPECIFIC IOCTLS                                      */
1579 /* ----------------------------------------------------------- */
1580
1581 static int radio_querycap(struct file *file, void  *priv,
1582                           struct v4l2_capability *cap)
1583 {
1584         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1585
1586         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1587         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1588         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1589
1590         cap->version = EM28XX_VERSION_CODE;
1591         cap->capabilities = V4L2_CAP_TUNER;
1592         return 0;
1593 }
1594
1595 static int radio_g_tuner(struct file *file, void *priv,
1596                          struct v4l2_tuner *t)
1597 {
1598         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1599
1600         if (unlikely(t->index > 0))
1601                 return -EINVAL;
1602
1603         strcpy(t->name, "Radio");
1604         t->type = V4L2_TUNER_RADIO;
1605
1606         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1607         return 0;
1608 }
1609
1610 static int radio_enum_input(struct file *file, void *priv,
1611                             struct v4l2_input *i)
1612 {
1613         if (i->index != 0)
1614                 return -EINVAL;
1615         strcpy(i->name, "Radio");
1616         i->type = V4L2_INPUT_TYPE_TUNER;
1617
1618         return 0;
1619 }
1620
1621 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1622 {
1623         if (unlikely(a->index))
1624                 return -EINVAL;
1625
1626         strcpy(a->name, "Radio");
1627         return 0;
1628 }
1629
1630 static int radio_s_tuner(struct file *file, void *priv,
1631                          struct v4l2_tuner *t)
1632 {
1633         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1634
1635         if (0 != t->index)
1636                 return -EINVAL;
1637
1638         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1639
1640         return 0;
1641 }
1642
1643 static int radio_s_audio(struct file *file, void *fh,
1644                          struct v4l2_audio *a)
1645 {
1646         return 0;
1647 }
1648
1649 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1650 {
1651         return 0;
1652 }
1653
1654 static int radio_queryctrl(struct file *file, void *priv,
1655                            struct v4l2_queryctrl *qc)
1656 {
1657         int i;
1658
1659         if (qc->id <  V4L2_CID_BASE ||
1660                 qc->id >= V4L2_CID_LASTP1)
1661                 return -EINVAL;
1662
1663         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1664                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1665                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1666                         return 0;
1667                 }
1668         }
1669
1670         return -EINVAL;
1671 }
1672
1673 /*
1674  * em28xx_v4l2_open()
1675  * inits the device and starts isoc transfer
1676  */
1677 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1678 {
1679         int minor = iminor(inode);
1680         int errCode = 0, radio = 0;
1681         struct em28xx *h,*dev = NULL;
1682         struct em28xx_fh *fh;
1683         enum v4l2_buf_type fh_type = 0;
1684
1685         list_for_each_entry(h, &em28xx_devlist, devlist) {
1686                 if (h->vdev->minor == minor) {
1687                         dev  = h;
1688                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1689                 }
1690                 if (h->vbi_dev->minor == minor) {
1691                         dev  = h;
1692                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1693                 }
1694                 if (h->radio_dev &&
1695                     h->radio_dev->minor == minor) {
1696                         radio = 1;
1697                         dev   = h;
1698                 }
1699         }
1700         if (NULL == dev)
1701                 return -ENODEV;
1702
1703         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1704                                 minor, v4l2_type_names[fh_type], dev->users);
1705
1706         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1707
1708         if (!fh) {
1709                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1710                 return -ENOMEM;
1711         }
1712         mutex_lock(&dev->lock);
1713         fh->dev = dev;
1714         fh->radio = radio;
1715         fh->type = fh_type;
1716         filp->private_data = fh;
1717
1718         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1719                 dev->width = norm_maxw(dev);
1720                 dev->height = norm_maxh(dev);
1721                 dev->hscale = 0;
1722                 dev->vscale = 0;
1723
1724                 em28xx_set_alternate(dev);
1725                 em28xx_resolution_set(dev);
1726
1727         }
1728         if (fh->radio) {
1729                 em28xx_videodbg("video_open: setting radio device\n");
1730                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1731         }
1732
1733         dev->users++;
1734
1735         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1736                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1737                         sizeof(struct em28xx_buffer), fh);
1738
1739         mutex_unlock(&dev->lock);
1740         return errCode;
1741 }
1742
1743 /*
1744  * em28xx_realease_resources()
1745  * unregisters the v4l2,i2c and usb devices
1746  * called when the device gets disconected or at module unload
1747 */
1748 static void em28xx_release_resources(struct em28xx *dev)
1749 {
1750
1751         /*FIXME: I2C IR should be disconnected */
1752
1753         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1754                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1755                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1756         list_del(&dev->devlist);
1757         if (dev->radio_dev) {
1758                 if (-1 != dev->radio_dev->minor)
1759                         video_unregister_device(dev->radio_dev);
1760                 else
1761                         video_device_release(dev->radio_dev);
1762                 dev->radio_dev = NULL;
1763         }
1764         if (dev->vbi_dev) {
1765                 if (-1 != dev->vbi_dev->minor)
1766                         video_unregister_device(dev->vbi_dev);
1767                 else
1768                         video_device_release(dev->vbi_dev);
1769                 dev->vbi_dev = NULL;
1770         }
1771         if (dev->vdev) {
1772                 if (-1 != dev->vdev->minor)
1773                         video_unregister_device(dev->vdev);
1774                 else
1775                         video_device_release(dev->vdev);
1776                 dev->vdev = NULL;
1777         }
1778         em28xx_i2c_unregister(dev);
1779         usb_put_dev(dev->udev);
1780
1781         /* Mark device as unused */
1782         em28xx_devused&=~(1<<dev->devno);
1783 }
1784
1785 /*
1786  * em28xx_v4l2_close()
1787  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1788  */
1789 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1790 {
1791         struct em28xx_fh *fh  = filp->private_data;
1792         struct em28xx    *dev = fh->dev;
1793         int              errCode;
1794
1795         em28xx_videodbg("users=%d\n", dev->users);
1796
1797
1798         if (res_check(fh))
1799                 res_free(fh);
1800
1801         mutex_lock(&dev->lock);
1802
1803         if (dev->users == 1) {
1804                 videobuf_stop(&fh->vb_vidq);
1805                 videobuf_mmap_free(&fh->vb_vidq);
1806
1807                 /* the device is already disconnect,
1808                    free the remaining resources */
1809                 if (dev->state & DEV_DISCONNECTED) {
1810                         em28xx_release_resources(dev);
1811                         mutex_unlock(&dev->lock);
1812                         kfree(dev);
1813                         return 0;
1814                 }
1815
1816                 /* do this before setting alternate! */
1817                 em28xx_uninit_isoc(dev);
1818
1819                 /* set alternate 0 */
1820                 dev->alt = 0;
1821                 em28xx_videodbg("setting alternate 0\n");
1822                 errCode = usb_set_interface(dev->udev, 0, 0);
1823                 if (errCode < 0) {
1824                         em28xx_errdev("cannot change alternate number to "
1825                                         "0 (error=%i)\n", errCode);
1826                 }
1827         }
1828         kfree(fh);
1829         dev->users--;
1830         wake_up_interruptible_nr(&dev->open, 1);
1831         mutex_unlock(&dev->lock);
1832         return 0;
1833 }
1834
1835 /*
1836  * em28xx_v4l2_read()
1837  * will allocate buffers when called for the first time
1838  */
1839 static ssize_t
1840 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1841                  loff_t *pos)
1842 {
1843         struct em28xx_fh *fh = filp->private_data;
1844         struct em28xx *dev = fh->dev;
1845         int rc;
1846
1847         rc = check_dev(dev);
1848         if (rc < 0)
1849                 return rc;
1850
1851         /* FIXME: read() is not prepared to allow changing the video
1852            resolution while streaming. Seems a bug at em28xx_set_fmt
1853          */
1854
1855         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1856                 if (unlikely(res_get(fh)))
1857                         return -EBUSY;
1858
1859                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1860                                         filp->f_flags & O_NONBLOCK);
1861         }
1862         return 0;
1863 }
1864
1865 /*
1866  * em28xx_v4l2_poll()
1867  * will allocate buffers when called for the first time
1868  */
1869 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1870 {
1871         struct em28xx_fh *fh = filp->private_data;
1872         struct em28xx *dev = fh->dev;
1873         int rc;
1874
1875         rc = check_dev(dev);
1876         if (rc < 0)
1877                 return rc;
1878
1879         if (unlikely(res_get(fh) < 0))
1880                 return POLLERR;
1881
1882         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1883                 return POLLERR;
1884
1885         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1886 }
1887
1888 /*
1889  * em28xx_v4l2_mmap()
1890  */
1891 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1892 {
1893         struct em28xx_fh *fh    = filp->private_data;
1894         struct em28xx    *dev   = fh->dev;
1895         int              rc;
1896
1897         if (unlikely(res_get(fh) < 0))
1898                 return -EBUSY;
1899
1900         rc = check_dev(dev);
1901         if (rc < 0)
1902                 return rc;
1903
1904         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1905
1906         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1907                 (unsigned long)vma->vm_start,
1908                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1909                 rc);
1910
1911         return rc;
1912 }
1913
1914 static const struct file_operations em28xx_v4l_fops = {
1915         .owner         = THIS_MODULE,
1916         .open          = em28xx_v4l2_open,
1917         .release       = em28xx_v4l2_close,
1918         .read          = em28xx_v4l2_read,
1919         .poll          = em28xx_v4l2_poll,
1920         .mmap          = em28xx_v4l2_mmap,
1921         .ioctl         = video_ioctl2,
1922         .llseek        = no_llseek,
1923         .compat_ioctl  = v4l_compat_ioctl32,
1924 };
1925
1926 static const struct file_operations radio_fops = {
1927         .owner         = THIS_MODULE,
1928         .open          = em28xx_v4l2_open,
1929         .release       = em28xx_v4l2_close,
1930         .ioctl         = video_ioctl2,
1931         .compat_ioctl  = v4l_compat_ioctl32,
1932         .llseek        = no_llseek,
1933 };
1934
1935 static const struct video_device em28xx_video_template = {
1936         .fops                       = &em28xx_v4l_fops,
1937         .release                    = video_device_release,
1938
1939         .minor                      = -1,
1940         .vidioc_querycap            = vidioc_querycap,
1941         .vidioc_enum_fmt_cap        = vidioc_enum_fmt_cap,
1942         .vidioc_g_fmt_cap           = vidioc_g_fmt_cap,
1943         .vidioc_try_fmt_cap         = vidioc_try_fmt_cap,
1944         .vidioc_s_fmt_cap           = vidioc_s_fmt_cap,
1945         .vidioc_g_audio             = vidioc_g_audio,
1946         .vidioc_s_audio             = vidioc_s_audio,
1947         .vidioc_cropcap             = vidioc_cropcap,
1948
1949         .vidioc_g_fmt_vbi_capture   = vidioc_g_fmt_vbi_capture,
1950         .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1951         .vidioc_s_fmt_vbi_capture   = vidioc_try_set_vbi_capture,
1952
1953         .vidioc_reqbufs             = vidioc_reqbufs,
1954         .vidioc_querybuf            = vidioc_querybuf,
1955         .vidioc_qbuf                = vidioc_qbuf,
1956         .vidioc_dqbuf               = vidioc_dqbuf,
1957         .vidioc_s_std               = vidioc_s_std,
1958         .vidioc_enum_input          = vidioc_enum_input,
1959         .vidioc_g_input             = vidioc_g_input,
1960         .vidioc_s_input             = vidioc_s_input,
1961         .vidioc_queryctrl           = vidioc_queryctrl,
1962         .vidioc_g_ctrl              = vidioc_g_ctrl,
1963         .vidioc_s_ctrl              = vidioc_s_ctrl,
1964         .vidioc_streamon            = vidioc_streamon,
1965         .vidioc_streamoff           = vidioc_streamoff,
1966         .vidioc_g_tuner             = vidioc_g_tuner,
1967         .vidioc_s_tuner             = vidioc_s_tuner,
1968         .vidioc_g_frequency         = vidioc_g_frequency,
1969         .vidioc_s_frequency         = vidioc_s_frequency,
1970 #ifdef CONFIG_VIDEO_ADV_DEBUG
1971         .vidioc_g_register          = vidioc_g_register,
1972         .vidioc_s_register          = vidioc_s_register,
1973 #endif
1974 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1975         .vidiocgmbuf                = vidiocgmbuf,
1976 #endif
1977
1978         .tvnorms                    = V4L2_STD_ALL,
1979         .current_norm               = V4L2_STD_PAL,
1980 };
1981
1982 static struct video_device em28xx_radio_template = {
1983         .name                 = "em28xx-radio",
1984         .type                 = VID_TYPE_TUNER,
1985         .fops                 = &radio_fops,
1986         .minor                = -1,
1987         .vidioc_querycap      = radio_querycap,
1988         .vidioc_g_tuner       = radio_g_tuner,
1989         .vidioc_enum_input    = radio_enum_input,
1990         .vidioc_g_audio       = radio_g_audio,
1991         .vidioc_s_tuner       = radio_s_tuner,
1992         .vidioc_s_audio       = radio_s_audio,
1993         .vidioc_s_input       = radio_s_input,
1994         .vidioc_queryctrl     = radio_queryctrl,
1995         .vidioc_g_ctrl        = vidioc_g_ctrl,
1996         .vidioc_s_ctrl        = vidioc_s_ctrl,
1997         .vidioc_g_frequency   = vidioc_g_frequency,
1998         .vidioc_s_frequency   = vidioc_s_frequency,
1999 #ifdef CONFIG_VIDEO_ADV_DEBUG
2000         .vidioc_g_register    = vidioc_g_register,
2001         .vidioc_s_register    = vidioc_s_register,
2002 #endif
2003 };
2004
2005 /******************************** usb interface *****************************************/
2006
2007
2008 static LIST_HEAD(em28xx_extension_devlist);
2009 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
2010
2011 int em28xx_register_extension(struct em28xx_ops *ops)
2012 {
2013         struct em28xx *h, *dev = NULL;
2014
2015         list_for_each_entry(h, &em28xx_devlist, devlist)
2016                 dev = h;
2017
2018         mutex_lock(&em28xx_extension_devlist_lock);
2019         list_add_tail(&ops->next, &em28xx_extension_devlist);
2020         if (dev)
2021                 ops->init(dev);
2022
2023         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
2024         mutex_unlock(&em28xx_extension_devlist_lock);
2025
2026         return 0;
2027 }
2028 EXPORT_SYMBOL(em28xx_register_extension);
2029
2030 void em28xx_unregister_extension(struct em28xx_ops *ops)
2031 {
2032         struct em28xx *h, *dev = NULL;
2033
2034         list_for_each_entry(h, &em28xx_devlist, devlist)
2035                 dev = h;
2036
2037         if (dev)
2038                 ops->fini(dev);
2039
2040         mutex_lock(&em28xx_extension_devlist_lock);
2041         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
2042         list_del(&ops->next);
2043         mutex_unlock(&em28xx_extension_devlist_lock);
2044 }
2045 EXPORT_SYMBOL(em28xx_unregister_extension);
2046
2047 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2048                                              const struct video_device *template,
2049                                              const int type,
2050                                              const char *type_name)
2051 {
2052         struct video_device *vfd;
2053
2054         vfd = video_device_alloc();
2055         if (NULL == vfd)
2056                 return NULL;
2057         *vfd = *template;
2058         vfd->minor   = -1;
2059         vfd->dev = &dev->udev->dev;
2060         vfd->release = video_device_release;
2061         vfd->type = type;
2062         vfd->debug = video_debug;
2063
2064         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2065                  dev->name, type_name);
2066
2067         return vfd;
2068 }
2069
2070
2071 /*
2072  * em28xx_init_dev()
2073  * allocates and inits the device structs, registers i2c bus and v4l device
2074  */
2075 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2076                            int minor)
2077 {
2078         struct em28xx_ops *ops = NULL;
2079         struct em28xx *dev = *devhandle;
2080         int retval = -ENOMEM;
2081         int errCode;
2082         unsigned int maxh, maxw;
2083
2084         dev->udev = udev;
2085         mutex_init(&dev->lock);
2086         spin_lock_init(&dev->slock);
2087         init_waitqueue_head(&dev->open);
2088         init_waitqueue_head(&dev->wait_frame);
2089         init_waitqueue_head(&dev->wait_stream);
2090
2091         dev->em28xx_write_regs = em28xx_write_regs;
2092         dev->em28xx_read_reg = em28xx_read_reg;
2093         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2094         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2095         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2096         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2097
2098         errCode = em28xx_read_reg(dev, CHIPID_REG);
2099         if (errCode >= 0)
2100                 em28xx_info("em28xx chip ID = %d\n", errCode);
2101
2102         em28xx_pre_card_setup(dev);
2103
2104         errCode = em28xx_config(dev);
2105         if (errCode) {
2106                 em28xx_errdev("error configuring device\n");
2107                 em28xx_devused &= ~(1<<dev->devno);
2108                 kfree(dev);
2109                 return -ENOMEM;
2110         }
2111
2112         /* register i2c bus */
2113         em28xx_i2c_register(dev);
2114
2115         /* Do board specific init and eeprom reading */
2116         em28xx_card_setup(dev);
2117
2118         /* Configure audio */
2119         em28xx_audio_analog_set(dev);
2120
2121         /* configure the device */
2122         em28xx_config_i2c(dev);
2123
2124         /* set default norm */
2125         dev->norm = em28xx_video_template.current_norm;
2126
2127         maxw = norm_maxw(dev);
2128         maxh = norm_maxh(dev);
2129
2130         /* set default image size */
2131         dev->width = maxw;
2132         dev->height = maxh;
2133         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2134         dev->hscale = 0;
2135         dev->vscale = 0;
2136         dev->ctl_input = 2;
2137
2138         errCode = em28xx_config(dev);
2139
2140         list_add_tail(&dev->devlist, &em28xx_devlist);
2141
2142         /* allocate and fill video video_device struct */
2143         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
2144                                           VID_TYPE_CAPTURE, "video");
2145         if (NULL == dev->vdev) {
2146                 em28xx_errdev("cannot allocate video_device.\n");
2147                 goto fail_unreg;
2148         }
2149         if (dev->tuner_type != TUNER_ABSENT)
2150                 dev->vdev->type |= VID_TYPE_TUNER;
2151
2152         /* register v4l2 video video_device */
2153         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2154                                        video_nr[dev->devno]);
2155         if (retval) {
2156                 em28xx_errdev("unable to register video device (error=%i).\n",
2157                               retval);
2158                 goto fail_unreg;
2159         }
2160
2161         /* Allocate and fill vbi video_device struct */
2162         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2163                                           VFL_TYPE_VBI, "vbi");
2164         /* register v4l2 vbi video_device */
2165         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2166                                         vbi_nr[dev->devno]) < 0) {
2167                 em28xx_errdev("unable to register vbi device\n");
2168                 retval = -ENODEV;
2169                 goto fail_unreg;
2170         }
2171
2172         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2173                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2174                                         VFL_TYPE_RADIO, "radio");
2175                 if (NULL == dev->radio_dev) {
2176                         em28xx_errdev("cannot allocate video_device.\n");
2177                         goto fail_unreg;
2178                 }
2179                 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2180                                             radio_nr[dev->devno]);
2181                 if (retval < 0) {
2182                         em28xx_errdev("can't register radio device\n");
2183                         goto fail_unreg;
2184                 }
2185                 em28xx_info("Registered radio device as /dev/radio%d\n",
2186                             dev->radio_dev->minor & 0x1f);
2187         }
2188
2189         /* init video dma queues */
2190         INIT_LIST_HEAD(&dev->vidq.active);
2191         INIT_LIST_HEAD(&dev->vidq.queued);
2192
2193
2194         if (dev->has_msp34xx) {
2195                 /* Send a reset to other chips via gpio */
2196                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2197                 msleep(3);
2198                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2199                 msleep(3);
2200         }
2201
2202         video_mux(dev, 0);
2203
2204         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2205                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2206                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2207
2208         mutex_lock(&em28xx_extension_devlist_lock);
2209         if (!list_empty(&em28xx_extension_devlist)) {
2210                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2211                         if (ops->id)
2212                                 ops->init(dev);
2213                 }
2214         }
2215         mutex_unlock(&em28xx_extension_devlist_lock);
2216
2217         return 0;
2218
2219 fail_unreg:
2220         em28xx_release_resources(dev);
2221         mutex_unlock(&dev->lock);
2222         kfree(dev);
2223         return retval;
2224 }
2225
2226 #if defined(CONFIG_MODULES) && defined(MODULE)
2227 static void request_module_async(struct work_struct *work)
2228 {
2229         struct em28xx *dev = container_of(work,
2230                              struct em28xx, request_module_wk);
2231
2232         if (dev->has_audio_class)
2233                 request_module("snd-usb-audio");
2234         else
2235                 request_module("em28xx-alsa");
2236
2237         if (dev->has_dvb)
2238                 request_module("em28xx-dvb");
2239 }
2240
2241 static void request_modules(struct em28xx *dev)
2242 {
2243         INIT_WORK(&dev->request_module_wk, request_module_async);
2244         schedule_work(&dev->request_module_wk);
2245 }
2246 #else
2247 #define request_modules(dev)
2248 #endif /* CONFIG_MODULES */
2249
2250 /*
2251  * em28xx_usb_probe()
2252  * checks for supported devices
2253  */
2254 static int em28xx_usb_probe(struct usb_interface *interface,
2255                             const struct usb_device_id *id)
2256 {
2257         const struct usb_endpoint_descriptor *endpoint;
2258         struct usb_device *udev;
2259         struct usb_interface *uif;
2260         struct em28xx *dev = NULL;
2261         int retval = -ENODEV;
2262         int i, nr, ifnum;
2263
2264         udev = usb_get_dev(interface_to_usbdev(interface));
2265         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2266
2267         /* Check to see next free device and mark as used */
2268         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2269         em28xx_devused|=1<<nr;
2270
2271         /* Don't register audio interfaces */
2272         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2273                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2274                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
2275                                 ifnum,
2276                                 interface->altsetting[0].desc.bInterfaceClass);
2277
2278                 em28xx_devused&=~(1<<nr);
2279                 return -ENODEV;
2280         }
2281
2282         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2283                         udev->descriptor.idVendor,udev->descriptor.idProduct,
2284                         ifnum,
2285                         interface->altsetting[0].desc.bInterfaceClass);
2286
2287         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2288
2289         /* check if the device has the iso in endpoint at the correct place */
2290         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2291             USB_ENDPOINT_XFER_ISOC) {
2292                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2293                 em28xx_devused&=~(1<<nr);
2294                 return -ENODEV;
2295         }
2296         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2297                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2298                 em28xx_devused&=~(1<<nr);
2299                 return -ENODEV;
2300         }
2301
2302         if (nr >= EM28XX_MAXBOARDS) {
2303                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2304                 em28xx_devused&=~(1<<nr);
2305                 return -ENOMEM;
2306         }
2307
2308         /* allocate memory for our device state and initialize it */
2309         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2310         if (dev == NULL) {
2311                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2312                 em28xx_devused&=~(1<<nr);
2313                 return -ENOMEM;
2314         }
2315
2316         snprintf(dev->name, 29, "em28xx #%d", nr);
2317         dev->devno = nr;
2318         dev->model = id->driver_info;
2319         dev->alt   = -1;
2320
2321         /* Checks if audio is provided by some interface */
2322         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2323                 uif = udev->config->interface[i];
2324                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2325                         dev->has_audio_class = 1;
2326                         break;
2327                 }
2328         }
2329
2330         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2331                    dev->has_audio_class ? "Has" : "Doesn't have");
2332
2333         /* compute alternate max packet sizes */
2334         uif = udev->actconfig->interface[0];
2335
2336         dev->num_alt=uif->num_altsetting;
2337         em28xx_info("Alternate settings: %i\n",dev->num_alt);
2338 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2339         dev->alt_max_pkt_size = kmalloc(32*
2340                                                 dev->num_alt,GFP_KERNEL);
2341         if (dev->alt_max_pkt_size == NULL) {
2342                 em28xx_errdev("out of memory!\n");
2343                 em28xx_devused&=~(1<<nr);
2344                 kfree(dev);
2345                 return -ENOMEM;
2346         }
2347
2348         for (i = 0; i < dev->num_alt ; i++) {
2349                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2350                                                         wMaxPacketSize);
2351                 dev->alt_max_pkt_size[i] =
2352                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2353                 em28xx_info("Alternate setting %i, max size= %i\n",i,
2354                                                         dev->alt_max_pkt_size[i]);
2355         }
2356
2357         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2358                 dev->model = card[nr];
2359
2360         /* allocate device struct */
2361         retval = em28xx_init_dev(&dev, udev, nr);
2362         if (retval)
2363                 return retval;
2364
2365         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2366
2367         /* save our data pointer in this interface device */
2368         usb_set_intfdata(interface, dev);
2369
2370 #if defined(CONFIG_VIDEO_EM28XX_DVB) || defined(CONFIG_VIDEO_EM28XX_DVB_MODULE)
2371         dev->qops = kmalloc(sizeof(em28xx_video_qops), GFP_KERNEL);
2372         memcpy(dev->qops, &em28xx_video_qops, sizeof(em28xx_video_qops));
2373 #endif
2374
2375         request_modules(dev);
2376
2377         return 0;
2378 }
2379
2380 /*
2381  * em28xx_usb_disconnect()
2382  * called when the device gets diconencted
2383  * video device will be unregistered on v4l2_close in case it is still open
2384  */
2385 static void em28xx_usb_disconnect(struct usb_interface *interface)
2386 {
2387         struct em28xx *dev;
2388         struct em28xx_ops *ops = NULL;
2389
2390         dev = usb_get_intfdata(interface);
2391         usb_set_intfdata(interface, NULL);
2392
2393         if (!dev)
2394                 return;
2395
2396         em28xx_info("disconnecting %s\n", dev->vdev->name);
2397
2398         /* wait until all current v4l2 io is finished then deallocate resources */
2399         mutex_lock(&dev->lock);
2400
2401         wake_up_interruptible_all(&dev->open);
2402
2403         if (dev->users) {
2404                 em28xx_warn
2405                     ("device /dev/video%d is open! Deregistration and memory "
2406                      "deallocation are deferred on close.\n",
2407                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2408
2409                 dev->state |= DEV_MISCONFIGURED;
2410                 em28xx_uninit_isoc(dev);
2411                 dev->state |= DEV_DISCONNECTED;
2412                 wake_up_interruptible(&dev->wait_frame);
2413                 wake_up_interruptible(&dev->wait_stream);
2414         } else {
2415                 dev->state |= DEV_DISCONNECTED;
2416                 em28xx_release_resources(dev);
2417         }
2418         mutex_unlock(&dev->lock);
2419
2420         mutex_lock(&em28xx_extension_devlist_lock);
2421         if (!list_empty(&em28xx_extension_devlist)) {
2422                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2423                         ops->fini(dev);
2424                 }
2425         }
2426         mutex_unlock(&em28xx_extension_devlist_lock);
2427
2428         if (!dev->users) {
2429                 kfree(dev->alt_max_pkt_size);
2430                 kfree(dev);
2431         }
2432 }
2433
2434 static struct usb_driver em28xx_usb_driver = {
2435         .name = "em28xx",
2436         .probe = em28xx_usb_probe,
2437         .disconnect = em28xx_usb_disconnect,
2438         .id_table = em28xx_id_table,
2439 };
2440
2441 static int __init em28xx_module_init(void)
2442 {
2443         int result;
2444
2445         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2446                (EM28XX_VERSION_CODE >> 16) & 0xff,
2447                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2448 #ifdef SNAPSHOT
2449         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2450                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2451 #endif
2452
2453         /* register this driver with the USB subsystem */
2454         result = usb_register(&em28xx_usb_driver);
2455         if (result)
2456                 em28xx_err(DRIVER_NAME
2457                            " usb_register failed. Error number %d.\n", result);
2458
2459         return result;
2460 }
2461
2462 static void __exit em28xx_module_exit(void)
2463 {
2464         /* deregister this driver with the USB subsystem */
2465         usb_deregister(&em28xx_usb_driver);
2466 }
2467
2468 module_init(em28xx_module_init);
2469 module_exit(em28xx_module_exit);