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   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         dev->ctl_aoutput = INPUT(index)->aout;
 570
 571         if (!dev->ctl_aoutput)
 572                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 573
 574         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 575
 576         if (dev->has_msp34xx) {
 577                 if (dev->i2s_speed) {
 578                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 579                                 &dev->i2s_speed);
 580                 }
 581                 route.input = dev->ctl_ainput;
 582                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 583                 /* Note: this is msp3400 specific */
 584                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 585                         &route);
 586         }
 587
 588         em28xx_audio_analog_set(dev);
 589 }
 590
 591 /* Usage lock check functions */
 592 static int res_get(struct em28xx_fh *fh)
 593 {
 594         struct em28xx    *dev = fh->dev;
 595         int              rc   = 0;
 596
 597         /* This instance already has stream_on */
 598         if (fh->stream_on)
 599                 return rc;
 600
 601         if (dev->stream_on)
 602                 return -EINVAL;
 603
 604         mutex_lock(&dev->lock);
 605         dev->stream_on = 1;
 606         fh->stream_on  = 1;
 607         mutex_unlock(&dev->lock);
 608         return rc;
 609 }
 610
 611 static int res_check(struct em28xx_fh *fh)
 612 {
 613         return (fh->stream_on);
 614 }
 615
 616 static void res_free(struct em28xx_fh *fh)
 617 {
 618         struct em28xx    *dev = fh->dev;
 619
 620         mutex_lock(&dev->lock);
 621         fh->stream_on = 0;
 622         dev->stream_on = 0;
 623         mutex_unlock(&dev->lock);
 624 }
 625
 626 /*
 627  * em28xx_get_ctrl()
 628  * return the current saturation, brightness or contrast, mute state
 629  */
 630 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 631 {
 632         switch (ctrl->id) {
 633         case V4L2_CID_AUDIO_MUTE:
 634                 ctrl->value = dev->mute;
 635                 return 0;
 636         case V4L2_CID_AUDIO_VOLUME:
 637                 ctrl->value = dev->volume;
 638                 return 0;
 639         default:
 640                 return -EINVAL;
 641         }
 642 }
 643
 644 /*
 645  * em28xx_set_ctrl()
 646  * mute or set new saturation, brightness or contrast
 647  */
 648 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 649 {
 650         switch (ctrl->id) {
 651         case V4L2_CID_AUDIO_MUTE:
 652                 if (ctrl->value != dev->mute) {
 653                         dev->mute = ctrl->value;
 654                         return em28xx_audio_analog_set(dev);
 655                 }
 656                 return 0;
 657         case V4L2_CID_AUDIO_VOLUME:
 658                 dev->volume = ctrl->value;
 659                 return em28xx_audio_analog_set(dev);
 660         default:
 661                 return -EINVAL;
 662         }
 663 }
 664
 665 static int check_dev(struct em28xx *dev)
 666 {
 667         if (dev->state & DEV_DISCONNECTED) {
 668                 em28xx_errdev("v4l2 ioctl: device not present\n");
 669                 return -ENODEV;
 670         }
 671
 672         if (dev->state & DEV_MISCONFIGURED) {
 673                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 674                               "close and open it again\n");
 675                 return -EIO;
 676         }
 677         return 0;
 678 }
 679
 680 static void get_scale(struct em28xx *dev,
 681                         unsigned int width, unsigned int height,
 682                         unsigned int *hscale, unsigned int *vscale)
 683 {
 684         unsigned int          maxw   = norm_maxw(dev);
 685         unsigned int          maxh   = norm_maxh(dev);
 686
 687         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 688         if (*hscale >= 0x4000)
 689                 *hscale = 0x3fff;
 690
 691         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 692         if (*vscale >= 0x4000)
 693                 *vscale = 0x3fff;
 694 }
 695
 696 /* ------------------------------------------------------------------
 697         IOCTL vidioc handling
 698    ------------------------------------------------------------------*/
 699
 700 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 701                                         struct v4l2_format *f)
 702 {
 703         struct em28xx_fh      *fh  = priv;
 704         struct em28xx         *dev = fh->dev;
 705
 706         mutex_lock(&dev->lock);
 707
 708         f->fmt.pix.width = dev->width;
 709         f->fmt.pix.height = dev->height;
 710         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 711         f->fmt.pix.bytesperline = dev->width * 2;
 712         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 713         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 714
 715         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 716         f->fmt.pix.field = dev->interlaced ?
 717                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 718
 719         mutex_unlock(&dev->lock);
 720         return 0;
 721 }
 722
 723 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 724                         struct v4l2_format *f)
 725 {
 726         struct em28xx_fh      *fh    = priv;
 727         struct em28xx         *dev   = fh->dev;
 728         int                   width  = f->fmt.pix.width;
 729         int                   height = f->fmt.pix.height;
 730         unsigned int          maxw   = norm_maxw(dev);
 731         unsigned int          maxh   = norm_maxh(dev);
 732         unsigned int          hscale, vscale;
 733
 734         /* width must even because of the YUYV format
 735            height must be even because of interlacing */
 736         height &= 0xfffe;
 737         width &= 0xfffe;
 738
 739         if (height < 32)
 740                 height = 32;
 741         if (height > maxh)
 742                 height = maxh;
 743         if (width < 48)
 744                 width = 48;
 745         if (width > maxw)
 746                 width = maxw;
 747
 748         mutex_lock(&dev->lock);
 749
 750         if (dev->is_em2800) {
 751                 /* the em2800 can only scale down to 50% */
 752                 if (height % (maxh / 2))
 753                         height = maxh;
 754                 if (width % (maxw / 2))
 755                         width = maxw;
 756                 /* according to empiatech support */
 757                 /* the MaxPacketSize is to small to support */
 758                 /* framesizes larger than 640x480 @ 30 fps */
 759                 /* or 640x576 @ 25 fps. As this would cut */
 760                 /* of a part of the image we prefer */
 761                 /* 360x576 or 360x480 for now */
 762                 if (width == maxw && height == maxh)
 763                         width /= 2;
 764         }
 765
 766         get_scale(dev, width, height, &hscale, &vscale);
 767
 768         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 769         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 770
 771         f->fmt.pix.width = width;
 772         f->fmt.pix.height = height;
 773         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 774         f->fmt.pix.bytesperline = width * 2;
 775         f->fmt.pix.sizeimage = width * 2 * height;
 776         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 777         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 778
 779         mutex_unlock(&dev->lock);
 780         return 0;
 781 }
 782
 783 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 784                         struct v4l2_format *f)
 785 {
 786         struct em28xx_fh      *fh  = priv;
 787         struct em28xx         *dev = fh->dev;
 788         int                   rc;
 789
 790         rc = check_dev(dev);
 791         if (rc < 0)
 792                 return rc;
 793
 794         vidioc_try_fmt_vid_cap(file, priv, f);
 795
 796         mutex_lock(&dev->lock);
 797
 798         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 799                 em28xx_errdev("%s queue busy\n", __func__);
 800                 rc = -EBUSY;
 801                 goto out;
 802         }
 803
 804         if (dev->stream_on && !fh->stream_on) {
 805                 em28xx_errdev("%s device in use by another fh\n", __func__);
 806                 rc = -EBUSY;
 807                 goto out;
 808         }
 809
 810         /* set new image size */
 811         dev->width = f->fmt.pix.width;
 812         dev->height = f->fmt.pix.height;
 813         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 814
 815         em28xx_set_alternate(dev);
 816         em28xx_resolution_set(dev);
 817
 818         rc = 0;
 819
 820 out:
 821         mutex_unlock(&dev->lock);
 822         return rc;
 823 }
 824
 825 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 826 {
 827         struct em28xx_fh   *fh  = priv;
 828         struct em28xx      *dev = fh->dev;
 829         struct v4l2_format f;
 830         int                rc;
 831
 832         rc = check_dev(dev);
 833         if (rc < 0)
 834                 return rc;
 835
 836         mutex_lock(&dev->lock);
 837         dev->norm = *norm;
 838         mutex_unlock(&dev->lock);
 839
 840         /* Adjusts width/height, if needed */
 841         f.fmt.pix.width = dev->width;
 842         f.fmt.pix.height = dev->height;
 843         vidioc_try_fmt_vid_cap(file, priv, &f);
 844
 845         mutex_lock(&dev->lock);
 846
 847         /* set new image size */
 848         dev->width = f.fmt.pix.width;
 849         dev->height = f.fmt.pix.height;
 850         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 851
 852         em28xx_resolution_set(dev);
 853         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 854
 855         mutex_unlock(&dev->lock);
 856         return 0;
 857 }
 858
 859 static const char *iname[] = {
 860         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 861         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 862         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 863         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 864         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 865         [EM28XX_VMUX_TELEVISION] = "Television",
 866         [EM28XX_VMUX_CABLE]      = "Cable TV",
 867         [EM28XX_VMUX_DVB]        = "DVB",
 868         [EM28XX_VMUX_DEBUG]      = "for debug only",
 869 };
 870
 871 static int vidioc_enum_input(struct file *file, void *priv,
 872                                 struct v4l2_input *i)
 873 {
 874         struct em28xx_fh   *fh  = priv;
 875         struct em28xx      *dev = fh->dev;
 876         unsigned int       n;
 877
 878         n = i->index;
 879         if (n >= MAX_EM28XX_INPUT)
 880                 return -EINVAL;
 881         if (0 == INPUT(n)->type)
 882                 return -EINVAL;
 883
 884         i->index = n;
 885         i->type = V4L2_INPUT_TYPE_CAMERA;
 886
 887         strcpy(i->name, iname[INPUT(n)->type]);
 888
 889         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 890                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 891                 i->type = V4L2_INPUT_TYPE_TUNER;
 892
 893         i->std = dev->vdev->tvnorms;
 894
 895         return 0;
 896 }
 897
 898 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 899 {
 900         struct em28xx_fh   *fh  = priv;
 901         struct em28xx      *dev = fh->dev;
 902
 903         *i = dev->ctl_input;
 904
 905         return 0;
 906 }
 907
 908 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 909 {
 910         struct em28xx_fh   *fh  = priv;
 911         struct em28xx      *dev = fh->dev;
 912         int                rc;
 913
 914         rc = check_dev(dev);
 915         if (rc < 0)
 916                 return rc;
 917
 918         if (i >= MAX_EM28XX_INPUT)
 919                 return -EINVAL;
 920         if (0 == INPUT(i)->type)
 921                 return -EINVAL;
 922
 923         mutex_lock(&dev->lock);
 924
 925         video_mux(dev, i);
 926
 927         mutex_unlock(&dev->lock);
 928         return 0;
 929 }
 930
 931 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 932 {
 933         struct em28xx_fh   *fh    = priv;
 934         struct em28xx      *dev   = fh->dev;
 935
 936         switch (a->index) {
 937         case EM28XX_AMUX_VIDEO:
 938                 strcpy(a->name, "Television");
 939                 break;
 940         case EM28XX_AMUX_LINE_IN:
 941                 strcpy(a->name, "Line In");
 942                 break;
 943         case EM28XX_AMUX_VIDEO2:
 944                 strcpy(a->name, "Television alt");
 945                 break;
 946         case EM28XX_AMUX_PHONE:
 947                 strcpy(a->name, "Phone");
 948                 break;
 949         case EM28XX_AMUX_MIC:
 950                 strcpy(a->name, "Mic");
 951                 break;
 952         case EM28XX_AMUX_CD:
 953                 strcpy(a->name, "CD");
 954                 break;
 955         case EM28XX_AMUX_AUX:
 956                 strcpy(a->name, "Aux");
 957                 break;
 958         case EM28XX_AMUX_PCM_OUT:
 959                 strcpy(a->name, "PCM");
 960                 break;
 961         default:
 962                 return -EINVAL;
 963         }
 964
 965         a->index = dev->ctl_ainput;
 966         a->capability = V4L2_AUDCAP_STEREO;
 967
 968         return 0;
 969 }
 970
 971 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 972 {
 973         struct em28xx_fh   *fh  = priv;
 974         struct em28xx      *dev = fh->dev;
 975
 976         dev->ctl_ainput = INPUT(a->index)->amux;
 977         dev->ctl_aoutput = INPUT(a->index)->aout;
 978
 979         if (!dev->ctl_aoutput)
 980                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 981         return 0;
 982 }
 983
 984 static int vidioc_queryctrl(struct file *file, void *priv,
 985                                 struct v4l2_queryctrl *qc)
 986 {
 987         struct em28xx_fh      *fh  = priv;
 988         struct em28xx         *dev = fh->dev;
 989         int                   id  = qc->id;
 990         int                   i;
 991         int                   rc;
 992
 993         rc = check_dev(dev);
 994         if (rc < 0)
 995                 return rc;
 996
 997         memset(qc, 0, sizeof(*qc));
 998
 999         qc->id = id;
1000
1001         if (!dev->has_msp34xx) {
1002                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1003                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1004                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1005                                 return 0;
1006                         }
1007                 }
1008         }
1009         mutex_lock(&dev->lock);
1010         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1011         mutex_unlock(&dev->lock);
1012
1013         if (qc->type)
1014                 return 0;
1015         else
1016                 return -EINVAL;
1017 }
1018
1019 static int vidioc_g_ctrl(struct file *file, void *priv,
1020                                 struct v4l2_control *ctrl)
1021 {
1022         struct em28xx_fh      *fh  = priv;
1023         struct em28xx         *dev = fh->dev;
1024         int                   rc;
1025
1026         rc = check_dev(dev);
1027         if (rc < 0)
1028                 return rc;
1029         mutex_lock(&dev->lock);
1030
1031         if (!dev->has_msp34xx)
1032                 rc = em28xx_get_ctrl(dev, ctrl);
1033         else
1034                 rc = -EINVAL;
1035
1036         if (rc == -EINVAL) {
1037                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1038                 rc = 0;
1039         }
1040
1041         mutex_unlock(&dev->lock);
1042         return rc;
1043 }
1044
1045 static int vidioc_s_ctrl(struct file *file, void *priv,
1046                                 struct v4l2_control *ctrl)
1047 {
1048         struct em28xx_fh      *fh  = priv;
1049         struct em28xx         *dev = fh->dev;
1050         u8                    i;
1051         int                   rc;
1052
1053         rc = check_dev(dev);
1054         if (rc < 0)
1055                 return rc;
1056
1057         mutex_lock(&dev->lock);
1058
1059         if (dev->has_msp34xx)
1060                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1061         else {
1062                 rc = 1;
1063                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1064                         if (ctrl->id == em28xx_qctrl[i].id) {
1065                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1066                                     ctrl->value > em28xx_qctrl[i].maximum) {
1067                                         rc = -ERANGE;
1068                                         break;
1069                                 }
1070
1071                                 rc = em28xx_set_ctrl(dev, ctrl);
1072                                 break;
1073                         }
1074                 }
1075         }
1076
1077         /* Control not found - try to send it to the attached devices */
1078         if (rc == 1) {
1079                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1080                 rc = 0;
1081         }
1082
1083         mutex_unlock(&dev->lock);
1084         return rc;
1085 }
1086
1087 static int vidioc_g_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         strcpy(t->name, "Tuner");
1102
1103         mutex_lock(&dev->lock);
1104
1105         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1106
1107         mutex_unlock(&dev->lock);
1108         return 0;
1109 }
1110
1111 static int vidioc_s_tuner(struct file *file, void *priv,
1112                                 struct v4l2_tuner *t)
1113 {
1114         struct em28xx_fh      *fh  = priv;
1115         struct em28xx         *dev = fh->dev;
1116         int                   rc;
1117
1118         rc = check_dev(dev);
1119         if (rc < 0)
1120                 return rc;
1121
1122         if (0 != t->index)
1123                 return -EINVAL;
1124
1125         mutex_lock(&dev->lock);
1126
1127         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1128
1129         mutex_unlock(&dev->lock);
1130         return 0;
1131 }
1132
1133 static int vidioc_g_frequency(struct file *file, void *priv,
1134                                 struct v4l2_frequency *f)
1135 {
1136         struct em28xx_fh      *fh  = priv;
1137         struct em28xx         *dev = fh->dev;
1138
1139         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1140         f->frequency = dev->ctl_freq;
1141
1142         return 0;
1143 }
1144
1145 static int vidioc_s_frequency(struct file *file, void *priv,
1146                                 struct v4l2_frequency *f)
1147 {
1148         struct em28xx_fh      *fh  = priv;
1149         struct em28xx         *dev = fh->dev;
1150         int                   rc;
1151
1152         rc = check_dev(dev);
1153         if (rc < 0)
1154                 return rc;
1155
1156         if (0 != f->tuner)
1157                 return -EINVAL;
1158
1159         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1160                 return -EINVAL;
1161         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1162                 return -EINVAL;
1163
1164         mutex_lock(&dev->lock);
1165
1166         dev->ctl_freq = f->frequency;
1167         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1168
1169         mutex_unlock(&dev->lock);
1170         return 0;
1171 }
1172
1173 #ifdef CONFIG_VIDEO_ADV_DEBUG
1174 static int em28xx_reg_len(int reg)
1175 {
1176         switch (reg) {
1177         case EM28XX_R40_AC97LSB:
1178         case EM28XX_R30_HSCALELOW:
1179         case EM28XX_R32_VSCALELOW:
1180                 return 2;
1181         default:
1182                 return 1;
1183         }
1184 }
1185
1186 static int vidioc_g_register(struct file *file, void *priv,
1187                              struct v4l2_register *reg)
1188 {
1189         struct em28xx_fh      *fh  = priv;
1190         struct em28xx         *dev = fh->dev;
1191         int ret;
1192
1193         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1194                 return -EINVAL;
1195
1196         if (em28xx_reg_len(reg->reg) == 1) {
1197                 ret = em28xx_read_reg(dev, reg->reg);
1198                 if (ret < 0)
1199                         return ret;
1200
1201                 reg->val = ret;
1202         } else {
1203                 __le64 val = 0;
1204                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1205                                                    reg->reg, (char *)&val, 2);
1206                 if (ret < 0)
1207                         return ret;
1208
1209                 reg->val = le64_to_cpu(val);
1210         }
1211
1212         return 0;
1213 }
1214
1215 static int vidioc_s_register(struct file *file, void *priv,
1216                              struct v4l2_register *reg)
1217 {
1218         struct em28xx_fh      *fh  = priv;
1219         struct em28xx         *dev = fh->dev;
1220         __le64 buf;
1221
1222         buf = cpu_to_le64(reg->val);
1223
1224         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1225                                  em28xx_reg_len(reg->reg));
1226 }
1227 #endif
1228
1229
1230 static int vidioc_cropcap(struct file *file, void *priv,
1231                                         struct v4l2_cropcap *cc)
1232 {
1233         struct em28xx_fh      *fh  = priv;
1234         struct em28xx         *dev = fh->dev;
1235
1236         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1237                 return -EINVAL;
1238
1239         cc->bounds.left = 0;
1240         cc->bounds.top = 0;
1241         cc->bounds.width = dev->width;
1242         cc->bounds.height = dev->height;
1243         cc->defrect = cc->bounds;
1244         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1245         cc->pixelaspect.denominator = 59;
1246
1247         return 0;
1248 }
1249
1250 static int vidioc_streamon(struct file *file, void *priv,
1251                                         enum v4l2_buf_type type)
1252 {
1253         struct em28xx_fh      *fh  = priv;
1254         struct em28xx         *dev = fh->dev;
1255         int                   rc;
1256
1257         rc = check_dev(dev);
1258         if (rc < 0)
1259                 return rc;
1260
1261
1262         if (unlikely(res_get(fh) < 0))
1263                 return -EBUSY;
1264
1265         return (videobuf_streamon(&fh->vb_vidq));
1266 }
1267
1268 static int vidioc_streamoff(struct file *file, void *priv,
1269                                         enum v4l2_buf_type type)
1270 {
1271         struct em28xx_fh      *fh  = priv;
1272         struct em28xx         *dev = fh->dev;
1273         int                   rc;
1274
1275         rc = check_dev(dev);
1276         if (rc < 0)
1277                 return rc;
1278
1279         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1280                 return -EINVAL;
1281         if (type != fh->type)
1282                 return -EINVAL;
1283
1284         videobuf_streamoff(&fh->vb_vidq);
1285         res_free(fh);
1286
1287         return 0;
1288 }
1289
1290 static int vidioc_querycap(struct file *file, void  *priv,
1291                                         struct v4l2_capability *cap)
1292 {
1293         struct em28xx_fh      *fh  = priv;
1294         struct em28xx         *dev = fh->dev;
1295
1296         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1297         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1298         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1299
1300         cap->version = EM28XX_VERSION_CODE;
1301
1302         cap->capabilities =
1303                         V4L2_CAP_SLICED_VBI_CAPTURE |
1304                         V4L2_CAP_VIDEO_CAPTURE |
1305                         V4L2_CAP_AUDIO |
1306                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1307
1308         if (dev->tuner_type != TUNER_ABSENT)
1309                 cap->capabilities |= V4L2_CAP_TUNER;
1310
1311         return 0;
1312 }
1313
1314 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1315                                         struct v4l2_fmtdesc *fmtd)
1316 {
1317         if (fmtd->index != 0)
1318                 return -EINVAL;
1319
1320         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1321         strcpy(fmtd->description, "Packed YUY2");
1322         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1323         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1324
1325         return 0;
1326 }
1327
1328 /* Sliced VBI ioctls */
1329 static int vidioc_g_fmt_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
1342         f->fmt.sliced.service_set = 0;
1343
1344         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1345
1346         if (f->fmt.sliced.service_set == 0)
1347                 rc = -EINVAL;
1348
1349         mutex_unlock(&dev->lock);
1350         return rc;
1351 }
1352
1353 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1354                         struct v4l2_format *f)
1355 {
1356         struct em28xx_fh      *fh  = priv;
1357         struct em28xx         *dev = fh->dev;
1358         int                   rc;
1359
1360         rc = check_dev(dev);
1361         if (rc < 0)
1362                 return rc;
1363
1364         mutex_lock(&dev->lock);
1365         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1366         mutex_unlock(&dev->lock);
1367
1368         if (f->fmt.sliced.service_set == 0)
1369                 return -EINVAL;
1370
1371         return 0;
1372 }
1373
1374
1375 static int vidioc_reqbufs(struct file *file, void *priv,
1376                           struct v4l2_requestbuffers *rb)
1377 {
1378         struct em28xx_fh      *fh  = priv;
1379         struct em28xx         *dev = fh->dev;
1380         int                   rc;
1381
1382         rc = check_dev(dev);
1383         if (rc < 0)
1384                 return rc;
1385
1386         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1387 }
1388
1389 static int vidioc_querybuf(struct file *file, void *priv,
1390                            struct v4l2_buffer *b)
1391 {
1392         struct em28xx_fh      *fh  = priv;
1393         struct em28xx         *dev = fh->dev;
1394         int                   rc;
1395
1396         rc = check_dev(dev);
1397         if (rc < 0)
1398                 return rc;
1399
1400         return (videobuf_querybuf(&fh->vb_vidq, b));
1401 }
1402
1403 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1404 {
1405         struct em28xx_fh      *fh  = priv;
1406         struct em28xx         *dev = fh->dev;
1407         int                   rc;
1408
1409         rc = check_dev(dev);
1410         if (rc < 0)
1411                 return rc;
1412
1413         return (videobuf_qbuf(&fh->vb_vidq, b));
1414 }
1415
1416 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1417 {
1418         struct em28xx_fh      *fh  = priv;
1419         struct em28xx         *dev = fh->dev;
1420         int                   rc;
1421
1422         rc = check_dev(dev);
1423         if (rc < 0)
1424                 return rc;
1425
1426         return (videobuf_dqbuf(&fh->vb_vidq, b,
1427                                 file->f_flags & O_NONBLOCK));
1428 }
1429
1430 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1431 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1432 {
1433         struct em28xx_fh  *fh = priv;
1434
1435         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1436 }
1437 #endif
1438
1439
1440 /* ----------------------------------------------------------- */
1441 /* RADIO ESPECIFIC IOCTLS                                      */
1442 /* ----------------------------------------------------------- */
1443
1444 static int radio_querycap(struct file *file, void  *priv,
1445                           struct v4l2_capability *cap)
1446 {
1447         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1448
1449         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1450         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1451         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1452
1453         cap->version = EM28XX_VERSION_CODE;
1454         cap->capabilities = V4L2_CAP_TUNER;
1455         return 0;
1456 }
1457
1458 static int radio_g_tuner(struct file *file, void *priv,
1459                          struct v4l2_tuner *t)
1460 {
1461         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1462
1463         if (unlikely(t->index > 0))
1464                 return -EINVAL;
1465
1466         strcpy(t->name, "Radio");
1467         t->type = V4L2_TUNER_RADIO;
1468
1469         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1470         return 0;
1471 }
1472
1473 static int radio_enum_input(struct file *file, void *priv,
1474                             struct v4l2_input *i)
1475 {
1476         if (i->index != 0)
1477                 return -EINVAL;
1478         strcpy(i->name, "Radio");
1479         i->type = V4L2_INPUT_TYPE_TUNER;
1480
1481         return 0;
1482 }
1483
1484 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1485 {
1486         if (unlikely(a->index))
1487                 return -EINVAL;
1488
1489         strcpy(a->name, "Radio");
1490         return 0;
1491 }
1492
1493 static int radio_s_tuner(struct file *file, void *priv,
1494                          struct v4l2_tuner *t)
1495 {
1496         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1497
1498         if (0 != t->index)
1499                 return -EINVAL;
1500
1501         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1502
1503         return 0;
1504 }
1505
1506 static int radio_s_audio(struct file *file, void *fh,
1507                          struct v4l2_audio *a)
1508 {
1509         return 0;
1510 }
1511
1512 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1513 {
1514         return 0;
1515 }
1516
1517 static int radio_queryctrl(struct file *file, void *priv,
1518                            struct v4l2_queryctrl *qc)
1519 {
1520         int i;
1521
1522         if (qc->id <  V4L2_CID_BASE ||
1523                 qc->id >= V4L2_CID_LASTP1)
1524                 return -EINVAL;
1525
1526         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1527                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1528                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1529                         return 0;
1530                 }
1531         }
1532
1533         return -EINVAL;
1534 }
1535
1536 /*
1537  * em28xx_v4l2_open()
1538  * inits the device and starts isoc transfer
1539  */
1540 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1541 {
1542         int minor = iminor(inode);
1543         int errCode = 0, radio = 0;
1544         struct em28xx *h, *dev = NULL;
1545         struct em28xx_fh *fh;
1546         enum v4l2_buf_type fh_type = 0;
1547
1548         mutex_lock(&em28xx_devlist_mutex);
1549         list_for_each_entry(h, &em28xx_devlist, devlist) {
1550                 if (h->vdev->minor == minor) {
1551                         dev  = h;
1552                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1553                 }
1554                 if (h->vbi_dev->minor == minor) {
1555                         dev  = h;
1556                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1557                 }
1558                 if (h->radio_dev &&
1559                     h->radio_dev->minor == minor) {
1560                         radio = 1;
1561                         dev   = h;
1562                 }
1563         }
1564         mutex_unlock(&em28xx_devlist_mutex);
1565         if (NULL == dev)
1566                 return -ENODEV;
1567
1568         mutex_lock(&dev->lock);
1569
1570         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1571                                 minor, v4l2_type_names[fh_type], dev->users);
1572
1573
1574         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1575         if (!fh) {
1576                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1577                 mutex_unlock(&dev->lock);
1578                 return -ENOMEM;
1579         }
1580         fh->dev = dev;
1581         fh->radio = radio;
1582         fh->type = fh_type;
1583         filp->private_data = fh;
1584
1585         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1586                 dev->width = norm_maxw(dev);
1587                 dev->height = norm_maxh(dev);
1588                 dev->hscale = 0;
1589                 dev->vscale = 0;
1590
1591                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1592                 em28xx_set_alternate(dev);
1593                 em28xx_resolution_set(dev);
1594
1595                 /* Needed, since GPIO might have disabled power of
1596                    some i2c device
1597                  */
1598                 em28xx_config_i2c(dev);
1599
1600         }
1601         if (fh->radio) {
1602                 em28xx_videodbg("video_open: setting radio device\n");
1603                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1604         }
1605
1606         dev->users++;
1607
1608         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1609                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1610                         sizeof(struct em28xx_buffer), fh);
1611
1612         mutex_unlock(&dev->lock);
1613
1614         return errCode;
1615 }
1616
1617 /*
1618  * em28xx_realease_resources()
1619  * unregisters the v4l2,i2c and usb devices
1620  * called when the device gets disconected or at module unload
1621 */
1622 static void em28xx_release_resources(struct em28xx *dev)
1623 {
1624
1625         /*FIXME: I2C IR should be disconnected */
1626
1627         list_del(&dev->devlist);
1628         if (dev->sbutton_input_dev)
1629                 em28xx_deregister_snapshot_button(dev);
1630
1631         if (dev->ir)
1632                 em28xx_ir_fini(dev);
1633
1634         if (dev->radio_dev) {
1635                 if (-1 != dev->radio_dev->minor)
1636                         video_unregister_device(dev->radio_dev);
1637                 else
1638                         video_device_release(dev->radio_dev);
1639                 dev->radio_dev = NULL;
1640         }
1641         if (dev->vbi_dev) {
1642                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1643                             dev->vbi_dev->num);
1644                 if (-1 != dev->vbi_dev->minor)
1645                         video_unregister_device(dev->vbi_dev);
1646                 else
1647                         video_device_release(dev->vbi_dev);
1648                 dev->vbi_dev = NULL;
1649         }
1650         if (dev->vdev) {
1651                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1652                             dev->vdev->num);
1653                 if (-1 != dev->vdev->minor)
1654                         video_unregister_device(dev->vdev);
1655                 else
1656                         video_device_release(dev->vdev);
1657                 dev->vdev = NULL;
1658         }
1659         em28xx_i2c_unregister(dev);
1660         usb_put_dev(dev->udev);
1661
1662         /* Mark device as unused */
1663         em28xx_devused &= ~(1<<dev->devno);
1664 }
1665
1666 /*
1667  * em28xx_v4l2_close()
1668  * stops streaming and deallocates all resources allocated by the v4l2
1669  * calls and ioctls
1670  */
1671 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1672 {
1673         struct em28xx_fh *fh  = filp->private_data;
1674         struct em28xx    *dev = fh->dev;
1675         int              errCode;
1676
1677         em28xx_videodbg("users=%d\n", dev->users);
1678
1679
1680         if (res_check(fh))
1681                 res_free(fh);
1682
1683         mutex_lock(&dev->lock);
1684
1685         if (dev->users == 1) {
1686                 videobuf_stop(&fh->vb_vidq);
1687                 videobuf_mmap_free(&fh->vb_vidq);
1688
1689                 /* the device is already disconnect,
1690                    free the remaining resources */
1691                 if (dev->state & DEV_DISCONNECTED) {
1692                         em28xx_release_resources(dev);
1693                         mutex_unlock(&dev->lock);
1694                         kfree(dev);
1695                         return 0;
1696                 }
1697
1698                 /* do this before setting alternate! */
1699                 em28xx_uninit_isoc(dev);
1700                 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1701
1702                 /* set alternate 0 */
1703                 dev->alt = 0;
1704                 em28xx_videodbg("setting alternate 0\n");
1705                 errCode = usb_set_interface(dev->udev, 0, 0);
1706                 if (errCode < 0) {
1707                         em28xx_errdev("cannot change alternate number to "
1708                                         "0 (error=%i)\n", errCode);
1709                 }
1710         }
1711         kfree(fh);
1712         dev->users--;
1713         wake_up_interruptible_nr(&dev->open, 1);
1714         mutex_unlock(&dev->lock);
1715         return 0;
1716 }
1717
1718 /*
1719  * em28xx_v4l2_read()
1720  * will allocate buffers when called for the first time
1721  */
1722 static ssize_t
1723 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1724                  loff_t *pos)
1725 {
1726         struct em28xx_fh *fh = filp->private_data;
1727         struct em28xx *dev = fh->dev;
1728         int rc;
1729
1730         rc = check_dev(dev);
1731         if (rc < 0)
1732                 return rc;
1733
1734         /* FIXME: read() is not prepared to allow changing the video
1735            resolution while streaming. Seems a bug at em28xx_set_fmt
1736          */
1737
1738         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1739                 if (unlikely(res_get(fh)))
1740                         return -EBUSY;
1741
1742                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1743                                         filp->f_flags & O_NONBLOCK);
1744         }
1745         return 0;
1746 }
1747
1748 /*
1749  * em28xx_v4l2_poll()
1750  * will allocate buffers when called for the first time
1751  */
1752 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1753 {
1754         struct em28xx_fh *fh = filp->private_data;
1755         struct em28xx *dev = fh->dev;
1756         int rc;
1757
1758         rc = check_dev(dev);
1759         if (rc < 0)
1760                 return rc;
1761
1762         if (unlikely(res_get(fh) < 0))
1763                 return POLLERR;
1764
1765         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1766                 return POLLERR;
1767
1768         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1769 }
1770
1771 /*
1772  * em28xx_v4l2_mmap()
1773  */
1774 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1775 {
1776         struct em28xx_fh *fh    = filp->private_data;
1777         struct em28xx    *dev   = fh->dev;
1778         int              rc;
1779
1780         if (unlikely(res_get(fh) < 0))
1781                 return -EBUSY;
1782
1783         rc = check_dev(dev);
1784         if (rc < 0)
1785                 return rc;
1786
1787         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1788
1789         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1790                 (unsigned long)vma->vm_start,
1791                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1792                 rc);
1793
1794         return rc;
1795 }
1796
1797 static const struct file_operations em28xx_v4l_fops = {
1798         .owner         = THIS_MODULE,
1799         .open          = em28xx_v4l2_open,
1800         .release       = em28xx_v4l2_close,
1801         .read          = em28xx_v4l2_read,
1802         .poll          = em28xx_v4l2_poll,
1803         .mmap          = em28xx_v4l2_mmap,
1804         .ioctl         = video_ioctl2,
1805         .llseek        = no_llseek,
1806         .compat_ioctl  = v4l_compat_ioctl32,
1807 };
1808
1809 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1810         .vidioc_querycap            = vidioc_querycap,
1811         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1812         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1813         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1814         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1815         .vidioc_g_audio             = vidioc_g_audio,
1816         .vidioc_s_audio             = vidioc_s_audio,
1817         .vidioc_cropcap             = vidioc_cropcap,
1818
1819         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1820         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1821         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1822
1823         .vidioc_reqbufs             = vidioc_reqbufs,
1824         .vidioc_querybuf            = vidioc_querybuf,
1825         .vidioc_qbuf                = vidioc_qbuf,
1826         .vidioc_dqbuf               = vidioc_dqbuf,
1827         .vidioc_s_std               = vidioc_s_std,
1828         .vidioc_enum_input          = vidioc_enum_input,
1829         .vidioc_g_input             = vidioc_g_input,
1830         .vidioc_s_input             = vidioc_s_input,
1831         .vidioc_queryctrl           = vidioc_queryctrl,
1832         .vidioc_g_ctrl              = vidioc_g_ctrl,
1833         .vidioc_s_ctrl              = vidioc_s_ctrl,
1834         .vidioc_streamon            = vidioc_streamon,
1835         .vidioc_streamoff           = vidioc_streamoff,
1836         .vidioc_g_tuner             = vidioc_g_tuner,
1837         .vidioc_s_tuner             = vidioc_s_tuner,
1838         .vidioc_g_frequency         = vidioc_g_frequency,
1839         .vidioc_s_frequency         = vidioc_s_frequency,
1840 #ifdef CONFIG_VIDEO_ADV_DEBUG
1841         .vidioc_g_register          = vidioc_g_register,
1842         .vidioc_s_register          = vidioc_s_register,
1843 #endif
1844 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1845         .vidiocgmbuf                = vidiocgmbuf,
1846 #endif
1847 };
1848
1849 static const struct video_device em28xx_video_template = {
1850         .fops                       = &em28xx_v4l_fops,
1851         .release                    = video_device_release,
1852         .ioctl_ops                  = &video_ioctl_ops,
1853
1854         .minor                      = -1,
1855
1856         .tvnorms                    = V4L2_STD_ALL,
1857         .current_norm               = V4L2_STD_PAL,
1858 };
1859
1860 static const struct file_operations radio_fops = {
1861         .owner         = THIS_MODULE,
1862         .open          = em28xx_v4l2_open,
1863         .release       = em28xx_v4l2_close,
1864         .ioctl         = video_ioctl2,
1865         .compat_ioctl  = v4l_compat_ioctl32,
1866         .llseek        = no_llseek,
1867 };
1868
1869 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1870         .vidioc_querycap      = radio_querycap,
1871         .vidioc_g_tuner       = radio_g_tuner,
1872         .vidioc_enum_input    = radio_enum_input,
1873         .vidioc_g_audio       = radio_g_audio,
1874         .vidioc_s_tuner       = radio_s_tuner,
1875         .vidioc_s_audio       = radio_s_audio,
1876         .vidioc_s_input       = radio_s_input,
1877         .vidioc_queryctrl     = radio_queryctrl,
1878         .vidioc_g_ctrl        = vidioc_g_ctrl,
1879         .vidioc_s_ctrl        = vidioc_s_ctrl,
1880         .vidioc_g_frequency   = vidioc_g_frequency,
1881         .vidioc_s_frequency   = vidioc_s_frequency,
1882 #ifdef CONFIG_VIDEO_ADV_DEBUG
1883         .vidioc_g_register    = vidioc_g_register,
1884         .vidioc_s_register    = vidioc_s_register,
1885 #endif
1886 };
1887
1888 static struct video_device em28xx_radio_template = {
1889         .name                 = "em28xx-radio",
1890         .fops                 = &radio_fops,
1891         .ioctl_ops            = &radio_ioctl_ops,
1892         .minor                = -1,
1893 };
1894
1895 /******************************** usb interface ******************************/
1896
1897
1898 static LIST_HEAD(em28xx_extension_devlist);
1899 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1900
1901 int em28xx_register_extension(struct em28xx_ops *ops)
1902 {
1903         struct em28xx *dev = NULL;
1904
1905         mutex_lock(&em28xx_devlist_mutex);
1906         mutex_lock(&em28xx_extension_devlist_lock);
1907         list_add_tail(&ops->next, &em28xx_extension_devlist);
1908         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1909                 if (dev)
1910                         ops->init(dev);
1911         }
1912         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1913         mutex_unlock(&em28xx_extension_devlist_lock);
1914         mutex_unlock(&em28xx_devlist_mutex);
1915         return 0;
1916 }
1917 EXPORT_SYMBOL(em28xx_register_extension);
1918
1919 void em28xx_unregister_extension(struct em28xx_ops *ops)
1920 {
1921         struct em28xx *dev = NULL;
1922
1923         mutex_lock(&em28xx_devlist_mutex);
1924         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1925                 if (dev)
1926                         ops->fini(dev);
1927         }
1928
1929         mutex_lock(&em28xx_extension_devlist_lock);
1930         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1931         list_del(&ops->next);
1932         mutex_unlock(&em28xx_extension_devlist_lock);
1933         mutex_unlock(&em28xx_devlist_mutex);
1934 }
1935 EXPORT_SYMBOL(em28xx_unregister_extension);
1936
1937 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1938                                              const struct video_device *template,
1939                                              const char *type_name)
1940 {
1941         struct video_device *vfd;
1942
1943         vfd = video_device_alloc();
1944         if (NULL == vfd)
1945                 return NULL;
1946         *vfd = *template;
1947         vfd->minor   = -1;
1948         vfd->parent = &dev->udev->dev;
1949         vfd->release = video_device_release;
1950         vfd->debug = video_debug;
1951
1952         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1953                  dev->name, type_name);
1954
1955         return vfd;
1956 }
1957
1958 static int register_analog_devices(struct em28xx *dev)
1959 {
1960         int ret;
1961
1962         /* allocate and fill video video_device struct */
1963         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1964         if (!dev->vdev) {
1965                 em28xx_errdev("cannot allocate video_device.\n");
1966                 return -ENODEV;
1967         }
1968
1969         /* register v4l2 video video_device */
1970         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1971                                        video_nr[dev->devno]);
1972         if (ret) {
1973                 em28xx_errdev("unable to register video device (error=%i).\n",
1974                               ret);
1975                 return ret;
1976         }
1977
1978         /* Allocate and fill vbi video_device struct */
1979         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1980
1981         /* register v4l2 vbi video_device */
1982         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1983                                         vbi_nr[dev->devno]);
1984         if (ret < 0) {
1985                 em28xx_errdev("unable to register vbi device\n");
1986                 return ret;
1987         }
1988
1989         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1990                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
1991                 if (!dev->radio_dev) {
1992                         em28xx_errdev("cannot allocate video_device.\n");
1993                         return -ENODEV;
1994                 }
1995                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1996                                             radio_nr[dev->devno]);
1997                 if (ret < 0) {
1998                         em28xx_errdev("can't register radio device\n");
1999                         return ret;
2000                 }
2001                 em28xx_info("Registered radio device as /dev/radio%d\n",
2002                             dev->radio_dev->num);
2003         }
2004
2005         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2006                                 dev->vdev->num, dev->vbi_dev->num);
2007
2008         return 0;
2009 }
2010
2011
2012 /*
2013  * em28xx_init_dev()
2014  * allocates and inits the device structs, registers i2c bus and v4l device
2015  */
2016 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2017                            int minor)
2018 {
2019         struct em28xx_ops *ops = NULL;
2020         struct em28xx *dev = *devhandle;
2021         int retval = -ENOMEM;
2022         int errCode;
2023         unsigned int maxh, maxw;
2024
2025         dev->udev = udev;
2026         mutex_init(&dev->lock);
2027         mutex_init(&dev->ctrl_urb_lock);
2028         spin_lock_init(&dev->slock);
2029         init_waitqueue_head(&dev->open);
2030         init_waitqueue_head(&dev->wait_frame);
2031         init_waitqueue_head(&dev->wait_stream);
2032
2033         dev->em28xx_write_regs = em28xx_write_regs;
2034         dev->em28xx_read_reg = em28xx_read_reg;
2035         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2036         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2037         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2038         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2039
2040         em28xx_pre_card_setup(dev);
2041
2042         errCode = em28xx_config(dev);
2043         if (errCode) {
2044                 em28xx_errdev("error configuring device\n");
2045                 return -ENOMEM;
2046         }
2047
2048         /* register i2c bus */
2049         errCode = em28xx_i2c_register(dev);
2050         if (errCode < 0) {
2051                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2052                         __func__, errCode);
2053                 return errCode;
2054         }
2055
2056         /* Do board specific init and eeprom reading */
2057         em28xx_card_setup(dev);
2058
2059         /* Configure audio */
2060         errCode = em28xx_audio_setup(dev);
2061         if (errCode < 0) {
2062                 em28xx_errdev("%s: Error while setting audio - errCode [%d]!\n",
2063                         __func__, errCode);
2064         }
2065
2066         /* configure the device */
2067         em28xx_config_i2c(dev);
2068
2069         /* set default norm */
2070         dev->norm = em28xx_video_template.current_norm;
2071
2072         maxw = norm_maxw(dev);
2073         maxh = norm_maxh(dev);
2074
2075         /* set default image size */
2076         dev->width = maxw;
2077         dev->height = maxh;
2078         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2079         dev->hscale = 0;
2080         dev->vscale = 0;
2081         dev->ctl_input = 2;
2082
2083         errCode = em28xx_config(dev);
2084         if (errCode < 0) {
2085                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2086                         __func__, errCode);
2087                 return errCode;
2088         }
2089
2090         /* init video dma queues */
2091         INIT_LIST_HEAD(&dev->vidq.active);
2092         INIT_LIST_HEAD(&dev->vidq.queued);
2093
2094
2095         if (dev->has_msp34xx) {
2096                 /* Send a reset to other chips via gpio */
2097                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2098                 if (errCode < 0) {
2099                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2100                                 __func__, errCode);
2101                         return errCode;
2102                 }
2103                 msleep(3);
2104
2105                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2106                 if (errCode < 0) {
2107                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2108                                 __func__, errCode);
2109                         return errCode;
2110                 }
2111                 msleep(3);
2112         }
2113
2114         video_mux(dev, 0);
2115
2116         mutex_lock(&em28xx_devlist_mutex);
2117         list_add_tail(&dev->devlist, &em28xx_devlist);
2118         retval = register_analog_devices(dev);
2119         if (retval < 0) {
2120                 em28xx_release_resources(dev);
2121                 mutex_unlock(&em28xx_devlist_mutex);
2122                 goto fail_reg_devices;
2123         }
2124
2125         mutex_lock(&em28xx_extension_devlist_lock);
2126         if (!list_empty(&em28xx_extension_devlist)) {
2127                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2128                         if (ops->id)
2129                                 ops->init(dev);
2130                 }
2131         }
2132         mutex_unlock(&em28xx_extension_devlist_lock);
2133         mutex_unlock(&em28xx_devlist_mutex);
2134
2135         return 0;
2136
2137 fail_reg_devices:
2138         mutex_unlock(&dev->lock);
2139         return retval;
2140 }
2141
2142 #if defined(CONFIG_MODULES) && defined(MODULE)
2143 static void request_module_async(struct work_struct *work)
2144 {
2145         struct em28xx *dev = container_of(work,
2146                              struct em28xx, request_module_wk);
2147
2148         if (dev->has_audio_class)
2149                 request_module("snd-usb-audio");
2150         else if (dev->has_alsa_audio)
2151                 request_module("em28xx-alsa");
2152
2153         if (dev->has_dvb)
2154                 request_module("em28xx-dvb");
2155 }
2156
2157 static void request_modules(struct em28xx *dev)
2158 {
2159         INIT_WORK(&dev->request_module_wk, request_module_async);
2160         schedule_work(&dev->request_module_wk);
2161 }
2162 #else
2163 #define request_modules(dev)
2164 #endif /* CONFIG_MODULES */
2165
2166 /*
2167  * em28xx_usb_probe()
2168  * checks for supported devices
2169  */
2170 static int em28xx_usb_probe(struct usb_interface *interface,
2171                             const struct usb_device_id *id)
2172 {
2173         const struct usb_endpoint_descriptor *endpoint;
2174         struct usb_device *udev;
2175         struct usb_interface *uif;
2176         struct em28xx *dev = NULL;
2177         int retval = -ENODEV;
2178         int i, nr, ifnum, isoc_pipe;
2179
2180         udev = usb_get_dev(interface_to_usbdev(interface));
2181         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2182
2183         /* Check to see next free device and mark as used */
2184         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2185         em28xx_devused |= 1<<nr;
2186
2187         /* Don't register audio interfaces */
2188         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2189                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2190                                 udev->descriptor.idVendor,
2191                                 udev->descriptor.idProduct,
2192                                 ifnum,
2193                                 interface->altsetting[0].desc.bInterfaceClass);
2194
2195                 em28xx_devused &= ~(1<<nr);
2196                 return -ENODEV;
2197         }
2198
2199         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2200                         udev->descriptor.idVendor,
2201                         udev->descriptor.idProduct,
2202                         ifnum,
2203                         interface->altsetting[0].desc.bInterfaceClass);
2204
2205         endpoint = &interface->cur_altsetting->endpoint[0].desc;
2206
2207         /* check if the device has the iso in endpoint at the correct place */
2208         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
2209             USB_ENDPOINT_XFER_ISOC &&
2210             (interface->altsetting[1].endpoint[0].desc.wMaxPacketSize == 940))
2211         {
2212                 /* It's a newer em2874/em2875 device */
2213                 isoc_pipe = 0;
2214         } else {
2215                 isoc_pipe = 1;
2216                 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2217                 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2218                     USB_ENDPOINT_XFER_ISOC) {
2219                         em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2220                         em28xx_devused &= ~(1<<nr);
2221                         return -ENODEV;
2222                 }
2223                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2224                         em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2225                         em28xx_devused &= ~(1<<nr);
2226                         return -ENODEV;
2227                 }
2228         }
2229
2230         if (nr >= EM28XX_MAXBOARDS) {
2231                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2232                                 EM28XX_MAXBOARDS);
2233                 em28xx_devused &= ~(1<<nr);
2234                 return -ENOMEM;
2235         }
2236
2237         /* allocate memory for our device state and initialize it */
2238         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2239         if (dev == NULL) {
2240                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2241                 em28xx_devused &= ~(1<<nr);
2242                 return -ENOMEM;
2243         }
2244
2245         snprintf(dev->name, 29, "em28xx #%d", nr);
2246         dev->devno = nr;
2247         dev->model = id->driver_info;
2248         dev->alt   = -1;
2249
2250         /* Checks if audio is provided by some interface */
2251         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2252                 uif = udev->config->interface[i];
2253                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2254                         dev->has_audio_class = 1;
2255                         break;
2256                 }
2257         }
2258
2259         /* compute alternate max packet sizes */
2260         uif = udev->actconfig->interface[0];
2261
2262         dev->num_alt = uif->num_altsetting;
2263         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2264 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2265         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2266
2267         if (dev->alt_max_pkt_size == NULL) {
2268                 em28xx_errdev("out of memory!\n");
2269                 em28xx_devused &= ~(1<<nr);
2270                 kfree(dev);
2271                 return -ENOMEM;
2272         }
2273
2274         for (i = 0; i < dev->num_alt ; i++) {
2275                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
2276                                                         wMaxPacketSize);
2277                 dev->alt_max_pkt_size[i] =
2278                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2279                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2280                                                 dev->alt_max_pkt_size[i]);
2281         }
2282
2283         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2284                 dev->model = card[nr];
2285
2286         /* allocate device struct */
2287         retval = em28xx_init_dev(&dev, udev, nr);
2288         if (retval) {
2289                 em28xx_devused &= ~(1<<dev->devno);
2290                 kfree(dev);
2291
2292                 return retval;
2293         }
2294
2295         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2296
2297         /* save our data pointer in this interface device */
2298         usb_set_intfdata(interface, dev);
2299
2300         request_modules(dev);
2301
2302         return 0;
2303 }
2304
2305 /*
2306  * em28xx_usb_disconnect()
2307  * called when the device gets diconencted
2308  * video device will be unregistered on v4l2_close in case it is still open
2309  */
2310 static void em28xx_usb_disconnect(struct usb_interface *interface)
2311 {
2312         struct em28xx *dev;
2313         struct em28xx_ops *ops = NULL;
2314
2315         dev = usb_get_intfdata(interface);
2316         usb_set_intfdata(interface, NULL);
2317
2318         if (!dev)
2319                 return;
2320
2321         em28xx_info("disconnecting %s\n", dev->vdev->name);
2322
2323         /* wait until all current v4l2 io is finished then deallocate
2324            resources */
2325         mutex_lock(&dev->lock);
2326
2327         wake_up_interruptible_all(&dev->open);
2328
2329         if (dev->users) {
2330                 em28xx_warn
2331                     ("device /dev/video%d is open! Deregistration and memory "
2332                      "deallocation are deferred on close.\n",
2333                                 dev->vdev->num);
2334
2335                 dev->state |= DEV_MISCONFIGURED;
2336                 em28xx_uninit_isoc(dev);
2337                 dev->state |= DEV_DISCONNECTED;
2338                 wake_up_interruptible(&dev->wait_frame);
2339                 wake_up_interruptible(&dev->wait_stream);
2340         } else {
2341                 dev->state |= DEV_DISCONNECTED;
2342                 em28xx_release_resources(dev);
2343         }
2344         mutex_unlock(&dev->lock);
2345
2346         mutex_lock(&em28xx_extension_devlist_lock);
2347         if (!list_empty(&em28xx_extension_devlist)) {
2348                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2349                         ops->fini(dev);
2350                 }
2351         }
2352         mutex_unlock(&em28xx_extension_devlist_lock);
2353
2354         if (!dev->users) {
2355                 kfree(dev->alt_max_pkt_size);
2356                 kfree(dev);
2357         }
2358 }
2359
2360 static struct usb_driver em28xx_usb_driver = {
2361         .name = "em28xx",
2362         .probe = em28xx_usb_probe,
2363         .disconnect = em28xx_usb_disconnect,
2364         .id_table = em28xx_id_table,
2365 };
2366
2367 static int __init em28xx_module_init(void)
2368 {
2369         int result;
2370
2371         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2372                (EM28XX_VERSION_CODE >> 16) & 0xff,
2373                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2374 #ifdef SNAPSHOT
2375         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2376                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2377 #endif
2378
2379         /* register this driver with the USB subsystem */
2380         result = usb_register(&em28xx_usb_driver);
2381         if (result)
2382                 em28xx_err(DRIVER_NAME
2383                            " usb_register failed. Error number %d.\n", result);
2384
2385         return result;
2386 }
2387
2388 static void __exit em28xx_module_exit(void)
2389 {
2390         /* deregister this driver with the USB subsystem */
2391         usb_deregister(&em28xx_usb_driver);
2392 }
2393
2394 module_init(em28xx_module_init);
2395 module_exit(em28xx_module_exit);