git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/em28xx/em28xx-video.c

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