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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/msp3400.h>
  42 #include <media/tuner.h>
  43
  44 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  45                       "Markus Rechberger <mrechberger@gmail.com>, " \
  46                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  47                       "Sascha Sommer <saschasommer@freenet.de>"
  48
  49 #define DRIVER_NAME         "em28xx"
  50 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  51 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
  52
  53 #define em28xx_videodbg(fmt, arg...) do {\
  54         if (video_debug) \
  55                 printk(KERN_INFO "%s %s :"fmt, \
  56                          dev->name, __func__ , ##arg); } while (0)
  57
  58 static unsigned int isoc_debug;
  59 module_param(isoc_debug, int, 0644);
  60 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  61
  62 #define em28xx_isocdbg(fmt, arg...) \
  63 do {\
  64         if (isoc_debug) { \
  65                 printk(KERN_INFO "%s %s :"fmt, \
  66                          dev->name, __func__ , ##arg); \
  67         } \
  68   } while (0)
  69
  70 MODULE_AUTHOR(DRIVER_AUTHOR);
  71 MODULE_DESCRIPTION(DRIVER_DESC);
  72 MODULE_LICENSE("GPL");
  73
  74 static LIST_HEAD(em28xx_devlist);
  75
  76 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  78 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80
  81 module_param_array(card,  int, NULL, 0444);
  82 module_param_array(video_nr, int, NULL, 0444);
  83 module_param_array(vbi_nr, int, NULL, 0444);
  84 module_param_array(radio_nr, int, NULL, 0444);
  85 MODULE_PARM_DESC(card,     "card type");
  86 MODULE_PARM_DESC(video_nr, "video device numbers");
  87 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  88 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  89
  90 static unsigned int video_debug;
  91 module_param(video_debug, int, 0644);
  92 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  93
  94 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  95 static unsigned long em28xx_devused;
  96
  97 /* supported controls */
  98 /* Common to all boards */
  99 static struct v4l2_queryctrl em28xx_qctrl[] = {
 100         {
 101                 .id = V4L2_CID_AUDIO_VOLUME,
 102                 .type = V4L2_CTRL_TYPE_INTEGER,
 103                 .name = "Volume",
 104                 .minimum = 0x0,
 105                 .maximum = 0x1f,
 106                 .step = 0x1,
 107                 .default_value = 0x1f,
 108                 .flags = 0,
 109         }, {
 110                 .id = V4L2_CID_AUDIO_MUTE,
 111                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 112                 .name = "Mute",
 113                 .minimum = 0,
 114                 .maximum = 1,
 115                 .step = 1,
 116                 .default_value = 1,
 117                 .flags = 0,
 118         }
 119 };
 120
 121 static struct usb_driver em28xx_usb_driver;
 122
 123 /* ------------------------------------------------------------------
 124         DMA and thread functions
 125    ------------------------------------------------------------------*/
 126
 127 /*
 128  * Announces that a buffer were filled and request the next
 129  */
 130 static inline void buffer_filled(struct em28xx *dev,
 131                                   struct em28xx_dmaqueue *dma_q,
 132                                   struct em28xx_buffer *buf)
 133 {
 134         /* Advice that buffer was filled */
 135         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 136         buf->vb.state = VIDEOBUF_DONE;
 137         buf->vb.field_count++;
 138         do_gettimeofday(&buf->vb.ts);
 139
 140         dev->isoc_ctl.buf = NULL;
 141
 142         list_del(&buf->vb.queue);
 143         wake_up(&buf->vb.done);
 144 }
 145
 146 /*
 147  * Identify the buffer header type and properly handles
 148  */
 149 static void em28xx_copy_video(struct em28xx *dev,
 150                               struct em28xx_dmaqueue  *dma_q,
 151                               struct em28xx_buffer *buf,
 152                               unsigned char *p,
 153                               unsigned char *outp, unsigned long len)
 154 {
 155         void *fieldstart, *startwrite, *startread;
 156         int  linesdone, currlinedone, offset, lencopy, remain;
 157         int bytesperline = dev->width << 1;
 158
 159         if (dma_q->pos + len > buf->vb.size)
 160                 len = buf->vb.size - dma_q->pos;
 161
 162         if (p[0] != 0x88 && p[0] != 0x22) {
 163                 em28xx_isocdbg("frame is not complete\n");
 164                 len += 4;
 165         } else
 166                 p += 4;
 167
 168         startread = p;
 169         remain = len;
 170
 171         /* Interlaces frame */
 172         if (buf->top_field)
 173                 fieldstart = outp;
 174         else
 175                 fieldstart = outp + bytesperline;
 176
 177         linesdone = dma_q->pos / bytesperline;
 178         currlinedone = dma_q->pos % bytesperline;
 179         offset = linesdone * bytesperline * 2 + currlinedone;
 180         startwrite = fieldstart + offset;
 181         lencopy = bytesperline - currlinedone;
 182         lencopy = lencopy > remain ? remain : lencopy;
 183
 184         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 185                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 186                                ((char *)startwrite + lencopy) -
 187                                ((char *)outp + buf->vb.size));
 188                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 189         }
 190         if (lencopy <= 0)
 191                 return;
 192         memcpy(startwrite, startread, lencopy);
 193
 194         remain -= lencopy;
 195
 196         while (remain > 0) {
 197                 startwrite += lencopy + bytesperline;
 198                 startread += lencopy;
 199                 if (bytesperline > remain)
 200                         lencopy = remain;
 201                 else
 202                         lencopy = bytesperline;
 203
 204                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 205                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 206                                        ((char *)startwrite + lencopy) -
 207                                        ((char *)outp + buf->vb.size));
 208                         lencopy = remain = (char *)outp + buf->vb.size -
 209                                            (char *)startwrite;
 210                 }
 211                 if (lencopy <= 0)
 212                         break;
 213
 214                 memcpy(startwrite, startread, lencopy);
 215
 216                 remain -= lencopy;
 217         }
 218
 219         dma_q->pos += len;
 220 }
 221
 222 static inline void print_err_status(struct em28xx *dev,
 223                                      int packet, int status)
 224 {
 225         char *errmsg = "Unknown";
 226
 227         switch (status) {
 228         case -ENOENT:
 229                 errmsg = "unlinked synchronuously";
 230                 break;
 231         case -ECONNRESET:
 232                 errmsg = "unlinked asynchronuously";
 233                 break;
 234         case -ENOSR:
 235                 errmsg = "Buffer error (overrun)";
 236                 break;
 237         case -EPIPE:
 238                 errmsg = "Stalled (device not responding)";
 239                 break;
 240         case -EOVERFLOW:
 241                 errmsg = "Babble (bad cable?)";
 242                 break;
 243         case -EPROTO:
 244                 errmsg = "Bit-stuff error (bad cable?)";
 245                 break;
 246         case -EILSEQ:
 247                 errmsg = "CRC/Timeout (could be anything)";
 248                 break;
 249         case -ETIME:
 250                 errmsg = "Device does not respond";
 251                 break;
 252         }
 253         if (packet < 0) {
 254                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 255         } else {
 256                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 257                                packet, status, errmsg);
 258         }
 259 }
 260
 261 /*
 262  * video-buf generic routine to get the next available buffer
 263  */
 264 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 265                                           struct em28xx_buffer **buf)
 266 {
 267         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 268         char *outp;
 269
 270         if (list_empty(&dma_q->active)) {
 271                 em28xx_isocdbg("No active queue to serve\n");
 272                 dev->isoc_ctl.buf = NULL;
 273                 *buf = NULL;
 274                 return;
 275         }
 276
 277         /* Get the next buffer */
 278         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 279
 280         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 281         outp = videobuf_to_vmalloc(&(*buf)->vb);
 282         memset(outp, 0, (*buf)->vb.size);
 283
 284         dev->isoc_ctl.buf = *buf;
 285
 286         return;
 287 }
 288
 289 /*
 290  * Controls the isoc copy of each urb packet
 291  */
 292 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 293 {
 294         struct em28xx_buffer    *buf;
 295         struct em28xx_dmaqueue  *dma_q = urb->context;
 296         unsigned char *outp = NULL;
 297         int i, len = 0, rc = 1;
 298         unsigned char *p;
 299
 300         if (!dev)
 301                 return 0;
 302
 303         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 304                 return 0;
 305
 306         if (urb->status < 0) {
 307                 print_err_status(dev, -1, urb->status);
 308                 if (urb->status == -ENOENT)
 309                         return 0;
 310         }
 311
 312         buf = dev->isoc_ctl.buf;
 313         if (buf != NULL)
 314                 outp = videobuf_to_vmalloc(&buf->vb);
 315
 316         for (i = 0; i < urb->number_of_packets; i++) {
 317                 int status = urb->iso_frame_desc[i].status;
 318
 319                 if (status < 0) {
 320                         print_err_status(dev, i, status);
 321                         if (urb->iso_frame_desc[i].status != -EPROTO)
 322                                 continue;
 323                 }
 324
 325                 len = urb->iso_frame_desc[i].actual_length - 4;
 326
 327                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 328                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 329                         continue;
 330                 }
 331                 if (urb->iso_frame_desc[i].actual_length >
 332                                                 dev->max_pkt_size) {
 333                         em28xx_isocdbg("packet bigger than packet size");
 334                         continue;
 335                 }
 336
 337                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 338
 339                 /* FIXME: incomplete buffer checks where removed to make
 340                    logic simpler. Impacts of those changes should be evaluated
 341                  */
 342                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 343                         em28xx_isocdbg("VBI HEADER!!!\n");
 344                         /* FIXME: Should add vbi copy */
 345                         continue;
 346                 }
 347                 if (p[0] == 0x22 && p[1] == 0x5a) {
 348                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 349                                        len, (p[2] & 1)? "odd" : "even");
 350
 351                         if (!(p[2] & 1)) {
 352                                 if (buf != NULL)
 353                                         buffer_filled(dev, dma_q, buf);
 354                                 get_next_buf(dma_q, &buf);
 355                                 if (buf == NULL)
 356                                         outp = NULL;
 357                                 else
 358                                         outp = videobuf_to_vmalloc(&buf->vb);
 359                         }
 360
 361                         if (buf != NULL) {
 362                                 if (p[2] & 1)
 363                                         buf->top_field = 0;
 364                                 else
 365                                         buf->top_field = 1;
 366                         }
 367
 368                         dma_q->pos = 0;
 369                 }
 370                 if (buf != NULL)
 371                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 372         }
 373         return rc;
 374 }
 375
 376 /* ------------------------------------------------------------------
 377         Videobuf operations
 378    ------------------------------------------------------------------*/
 379
 380 static int
 381 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 382 {
 383         struct em28xx_fh *fh = vq->priv_data;
 384         struct em28xx        *dev = fh->dev;
 385         struct v4l2_frequency f;
 386
 387         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 388         if (0 == *count)
 389                 *count = EM28XX_DEF_BUF;
 390
 391         if (*count < EM28XX_MIN_BUF)
 392                 *count = EM28XX_MIN_BUF;
 393
 394         dev->mode = EM28XX_ANALOG_MODE;
 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, EM28XX_ANALOG_CAPTURE);
 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
 518         /* Sets I2C speed to 100 KHz */
 519         if (!dev->is_em2800)
 520                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 521
 522         /* enable vbi capturing */
 523
 524 /*      em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
 525 /*      em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
 526         em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
 527
 528         dev->mute = 1;          /* maybe not the right place... */
 529         dev->volume = 0x1f;
 530
 531         em28xx_outfmt_set_yuv422(dev);
 532         em28xx_colorlevels_set_default(dev);
 533         em28xx_compression_disable(dev);
 534
 535         return 0;
 536 }
 537
 538 /*
 539  * em28xx_config_i2c()
 540  * configure i2c attached devices
 541  */
 542 static void em28xx_config_i2c(struct em28xx *dev)
 543 {
 544         struct v4l2_routing route;
 545
 546         route.input = INPUT(dev->ctl_input)->vmux;
 547         route.output = 0;
 548         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 549         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 550         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 551 }
 552
 553 static void video_mux(struct em28xx *dev, int index)
 554 {
 555         struct v4l2_routing route;
 556
 557         route.input = INPUT(index)->vmux;
 558         route.output = 0;
 559         dev->ctl_input = index;
 560         dev->ctl_ainput = INPUT(index)->amux;
 561
 562         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 563
 564         if (dev->has_msp34xx) {
 565                 if (dev->i2s_speed) {
 566                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 567                                 &dev->i2s_speed);
 568                 }
 569                 route.input = dev->ctl_ainput;
 570                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 571                 /* Note: this is msp3400 specific */
 572                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 573                         &route);
 574         }
 575
 576         em28xx_audio_analog_set(dev);
 577 }
 578
 579 /* Usage lock check functions */
 580 static int res_get(struct em28xx_fh *fh)
 581 {
 582         struct em28xx    *dev = fh->dev;
 583         int              rc   = 0;
 584
 585         /* This instance already has stream_on */
 586         if (fh->stream_on)
 587                 return rc;
 588
 589         if (dev->stream_on)
 590                 return -EINVAL;
 591
 592         mutex_lock(&dev->lock);
 593         dev->stream_on = 1;
 594         fh->stream_on  = 1;
 595         mutex_unlock(&dev->lock);
 596         return rc;
 597 }
 598
 599 static int res_check(struct em28xx_fh *fh)
 600 {
 601         return (fh->stream_on);
 602 }
 603
 604 static void res_free(struct em28xx_fh *fh)
 605 {
 606         struct em28xx    *dev = fh->dev;
 607
 608         mutex_lock(&dev->lock);
 609         fh->stream_on = 0;
 610         dev->stream_on = 0;
 611         mutex_unlock(&dev->lock);
 612 }
 613
 614 /*
 615  * em28xx_get_ctrl()
 616  * return the current saturation, brightness or contrast, mute state
 617  */
 618 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 619 {
 620         switch (ctrl->id) {
 621         case V4L2_CID_AUDIO_MUTE:
 622                 ctrl->value = dev->mute;
 623                 return 0;
 624         case V4L2_CID_AUDIO_VOLUME:
 625                 ctrl->value = dev->volume;
 626                 return 0;
 627         default:
 628                 return -EINVAL;
 629         }
 630 }
 631
 632 /*
 633  * em28xx_set_ctrl()
 634  * mute or set new saturation, brightness or contrast
 635  */
 636 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 637 {
 638         switch (ctrl->id) {
 639         case V4L2_CID_AUDIO_MUTE:
 640                 if (ctrl->value != dev->mute) {
 641                         dev->mute = ctrl->value;
 642                         return em28xx_audio_analog_set(dev);
 643                 }
 644                 return 0;
 645         case V4L2_CID_AUDIO_VOLUME:
 646                 dev->volume = ctrl->value;
 647                 return em28xx_audio_analog_set(dev);
 648         default:
 649                 return -EINVAL;
 650         }
 651 }
 652
 653 static int check_dev(struct em28xx *dev)
 654 {
 655         if (dev->state & DEV_DISCONNECTED) {
 656                 em28xx_errdev("v4l2 ioctl: device not present\n");
 657                 return -ENODEV;
 658         }
 659
 660         if (dev->state & DEV_MISCONFIGURED) {
 661                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 662                               "close and open it again\n");
 663                 return -EIO;
 664         }
 665         return 0;
 666 }
 667
 668 static void get_scale(struct em28xx *dev,
 669                         unsigned int width, unsigned int height,
 670                         unsigned int *hscale, unsigned int *vscale)
 671 {
 672         unsigned int          maxw   = norm_maxw(dev);
 673         unsigned int          maxh   = norm_maxh(dev);
 674
 675         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 676         if (*hscale >= 0x4000)
 677                 *hscale = 0x3fff;
 678
 679         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 680         if (*vscale >= 0x4000)
 681                 *vscale = 0x3fff;
 682 }
 683
 684 /* ------------------------------------------------------------------
 685         IOCTL vidioc handling
 686    ------------------------------------------------------------------*/
 687
 688 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 689                                         struct v4l2_format *f)
 690 {
 691         struct em28xx_fh      *fh  = priv;
 692         struct em28xx         *dev = fh->dev;
 693
 694         mutex_lock(&dev->lock);
 695
 696         f->fmt.pix.width = dev->width;
 697         f->fmt.pix.height = dev->height;
 698         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 699         f->fmt.pix.bytesperline = dev->width * 2;
 700         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 701         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 702
 703         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 704         f->fmt.pix.field = dev->interlaced ?
 705                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 706
 707         mutex_unlock(&dev->lock);
 708         return 0;
 709 }
 710
 711 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 712                         struct v4l2_format *f)
 713 {
 714         struct em28xx_fh      *fh    = priv;
 715         struct em28xx         *dev   = fh->dev;
 716         int                   width  = f->fmt.pix.width;
 717         int                   height = f->fmt.pix.height;
 718         unsigned int          maxw   = norm_maxw(dev);
 719         unsigned int          maxh   = norm_maxh(dev);
 720         unsigned int          hscale, vscale;
 721
 722         /* width must even because of the YUYV format
 723            height must be even because of interlacing */
 724         height &= 0xfffe;
 725         width &= 0xfffe;
 726
 727         if (height < 32)
 728                 height = 32;
 729         if (height > maxh)
 730                 height = maxh;
 731         if (width < 48)
 732                 width = 48;
 733         if (width > maxw)
 734                 width = maxw;
 735
 736         mutex_lock(&dev->lock);
 737
 738         if (dev->is_em2800) {
 739                 /* the em2800 can only scale down to 50% */
 740                 if (height % (maxh / 2))
 741                         height = maxh;
 742                 if (width % (maxw / 2))
 743                         width = maxw;
 744                 /* according to empiatech support */
 745                 /* the MaxPacketSize is to small to support */
 746                 /* framesizes larger than 640x480 @ 30 fps */
 747                 /* or 640x576 @ 25 fps. As this would cut */
 748                 /* of a part of the image we prefer */
 749                 /* 360x576 or 360x480 for now */
 750                 if (width == maxw && height == maxh)
 751                         width /= 2;
 752         }
 753
 754         get_scale(dev, width, height, &hscale, &vscale);
 755
 756         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 757         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 758
 759         f->fmt.pix.width = width;
 760         f->fmt.pix.height = height;
 761         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 762         f->fmt.pix.bytesperline = width * 2;
 763         f->fmt.pix.sizeimage = width * 2 * height;
 764         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 765         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 766
 767         mutex_unlock(&dev->lock);
 768         return 0;
 769 }
 770
 771 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 772                         struct v4l2_format *f)
 773 {
 774         struct em28xx_fh      *fh  = priv;
 775         struct em28xx         *dev = fh->dev;
 776         int                   rc;
 777
 778         rc = check_dev(dev);
 779         if (rc < 0)
 780                 return rc;
 781
 782         vidioc_try_fmt_cap(file, priv, f);
 783
 784         mutex_lock(&dev->lock);
 785
 786         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 787                 em28xx_errdev("%s queue busy\n", __func__);
 788                 rc = -EBUSY;
 789                 goto out;
 790         }
 791
 792         if (dev->stream_on && !fh->stream_on) {
 793                 em28xx_errdev("%s device in use by another fh\n", __func__);
 794                 rc = -EBUSY;
 795                 goto out;
 796         }
 797
 798         /* set new image size */
 799         dev->width = f->fmt.pix.width;
 800         dev->height = f->fmt.pix.height;
 801         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 802
 803         em28xx_set_alternate(dev);
 804         em28xx_resolution_set(dev);
 805
 806         rc = 0;
 807
 808 out:
 809         mutex_unlock(&dev->lock);
 810         return rc;
 811 }
 812
 813 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 814 {
 815         struct em28xx_fh   *fh  = priv;
 816         struct em28xx      *dev = fh->dev;
 817         struct v4l2_format f;
 818         int                rc;
 819
 820         rc = check_dev(dev);
 821         if (rc < 0)
 822                 return rc;
 823
 824         mutex_lock(&dev->lock);
 825         dev->norm = *norm;
 826         mutex_unlock(&dev->lock);
 827
 828         /* Adjusts width/height, if needed */
 829         f.fmt.pix.width = dev->width;
 830         f.fmt.pix.height = dev->height;
 831         vidioc_try_fmt_cap(file, priv, &f);
 832
 833         mutex_lock(&dev->lock);
 834
 835         /* set new image size */
 836         dev->width = f.fmt.pix.width;
 837         dev->height = f.fmt.pix.height;
 838         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 839
 840         em28xx_resolution_set(dev);
 841         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 842
 843         mutex_unlock(&dev->lock);
 844         return 0;
 845 }
 846
 847 static const char *iname[] = {
 848         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 849         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 850         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 851         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 852         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 853         [EM28XX_VMUX_TELEVISION] = "Television",
 854         [EM28XX_VMUX_CABLE]      = "Cable TV",
 855         [EM28XX_VMUX_DVB]        = "DVB",
 856         [EM28XX_VMUX_DEBUG]      = "for debug only",
 857 };
 858
 859 static int vidioc_enum_input(struct file *file, void *priv,
 860                                 struct v4l2_input *i)
 861 {
 862         struct em28xx_fh   *fh  = priv;
 863         struct em28xx      *dev = fh->dev;
 864         unsigned int       n;
 865
 866         n = i->index;
 867         if (n >= MAX_EM28XX_INPUT)
 868                 return -EINVAL;
 869         if (0 == INPUT(n)->type)
 870                 return -EINVAL;
 871
 872         i->index = n;
 873         i->type = V4L2_INPUT_TYPE_CAMERA;
 874
 875         strcpy(i->name, iname[INPUT(n)->type]);
 876
 877         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 878                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 879                 i->type = V4L2_INPUT_TYPE_TUNER;
 880
 881         i->std = dev->vdev->tvnorms;
 882
 883         return 0;
 884 }
 885
 886 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 887 {
 888         struct em28xx_fh   *fh  = priv;
 889         struct em28xx      *dev = fh->dev;
 890
 891         *i = dev->ctl_input;
 892
 893         return 0;
 894 }
 895
 896 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 897 {
 898         struct em28xx_fh   *fh  = priv;
 899         struct em28xx      *dev = fh->dev;
 900         int                rc;
 901
 902         rc = check_dev(dev);
 903         if (rc < 0)
 904                 return rc;
 905
 906         if (i >= MAX_EM28XX_INPUT)
 907                 return -EINVAL;
 908         if (0 == INPUT(i)->type)
 909                 return -EINVAL;
 910
 911         mutex_lock(&dev->lock);
 912
 913         video_mux(dev, i);
 914
 915         mutex_unlock(&dev->lock);
 916         return 0;
 917 }
 918
 919 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 920 {
 921         struct em28xx_fh   *fh    = priv;
 922         struct em28xx      *dev   = fh->dev;
 923         unsigned int        index = a->index;
 924
 925         if (a->index > 1)
 926                 return -EINVAL;
 927
 928         index = dev->ctl_ainput;
 929
 930         if (index == 0)
 931                 strcpy(a->name, "Television");
 932         else
 933                 strcpy(a->name, "Line In");
 934
 935         a->capability = V4L2_AUDCAP_STEREO;
 936         a->index = index;
 937
 938         return 0;
 939 }
 940
 941 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 942 {
 943         struct em28xx_fh   *fh  = priv;
 944         struct em28xx      *dev = fh->dev;
 945
 946         if (a->index != dev->ctl_ainput)
 947                 return -EINVAL;
 948
 949         return 0;
 950 }
 951
 952 static int vidioc_queryctrl(struct file *file, void *priv,
 953                                 struct v4l2_queryctrl *qc)
 954 {
 955         struct em28xx_fh      *fh  = priv;
 956         struct em28xx         *dev = fh->dev;
 957         int                   id  = qc->id;
 958         int                   i;
 959         int                   rc;
 960
 961         rc = check_dev(dev);
 962         if (rc < 0)
 963                 return rc;
 964
 965         memset(qc, 0, sizeof(*qc));
 966
 967         qc->id = id;
 968
 969         if (!dev->has_msp34xx) {
 970                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 971                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
 972                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
 973                                 return 0;
 974                         }
 975                 }
 976         }
 977         mutex_lock(&dev->lock);
 978         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
 979         mutex_unlock(&dev->lock);
 980
 981         if (qc->type)
 982                 return 0;
 983         else
 984                 return -EINVAL;
 985 }
 986
 987 static int vidioc_g_ctrl(struct file *file, void *priv,
 988                                 struct v4l2_control *ctrl)
 989 {
 990         struct em28xx_fh      *fh  = priv;
 991         struct em28xx         *dev = fh->dev;
 992         int                   rc;
 993
 994         rc = check_dev(dev);
 995         if (rc < 0)
 996                 return rc;
 997         mutex_lock(&dev->lock);
 998
 999         if (!dev->has_msp34xx)
1000                 rc = em28xx_get_ctrl(dev, ctrl);
1001         else
1002                 rc = -EINVAL;
1003
1004         if (rc == -EINVAL) {
1005                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1006                 rc = 0;
1007         }
1008
1009         mutex_unlock(&dev->lock);
1010         return rc;
1011 }
1012
1013 static int vidioc_s_ctrl(struct file *file, void *priv,
1014                                 struct v4l2_control *ctrl)
1015 {
1016         struct em28xx_fh      *fh  = priv;
1017         struct em28xx         *dev = fh->dev;
1018         u8                    i;
1019         int                   rc;
1020
1021         rc = check_dev(dev);
1022         if (rc < 0)
1023                 return rc;
1024
1025         mutex_lock(&dev->lock);
1026
1027         if (dev->has_msp34xx)
1028                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1029         else {
1030                 rc = 1;
1031                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1032                         if (ctrl->id == em28xx_qctrl[i].id) {
1033                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1034                                     ctrl->value > em28xx_qctrl[i].maximum) {
1035                                         rc = -ERANGE;
1036                                         break;
1037                                 }
1038
1039                                 rc = em28xx_set_ctrl(dev, ctrl);
1040                                 break;
1041                         }
1042                 }
1043         }
1044
1045         /* Control not found - try to send it to the attached devices */
1046         if (rc == 1) {
1047                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1048                 rc = 0;
1049         }
1050
1051         mutex_unlock(&dev->lock);
1052         return rc;
1053 }
1054
1055 static int vidioc_g_tuner(struct file *file, void *priv,
1056                                 struct v4l2_tuner *t)
1057 {
1058         struct em28xx_fh      *fh  = priv;
1059         struct em28xx         *dev = fh->dev;
1060         int                   rc;
1061
1062         rc = check_dev(dev);
1063         if (rc < 0)
1064                 return rc;
1065
1066         if (0 != t->index)
1067                 return -EINVAL;
1068
1069         strcpy(t->name, "Tuner");
1070
1071         mutex_lock(&dev->lock);
1072
1073         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1074
1075         mutex_unlock(&dev->lock);
1076         return 0;
1077 }
1078
1079 static int vidioc_s_tuner(struct file *file, void *priv,
1080                                 struct v4l2_tuner *t)
1081 {
1082         struct em28xx_fh      *fh  = priv;
1083         struct em28xx         *dev = fh->dev;
1084         int                   rc;
1085
1086         rc = check_dev(dev);
1087         if (rc < 0)
1088                 return rc;
1089
1090         if (0 != t->index)
1091                 return -EINVAL;
1092
1093         mutex_lock(&dev->lock);
1094
1095         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1096
1097         mutex_unlock(&dev->lock);
1098         return 0;
1099 }
1100
1101 static int vidioc_g_frequency(struct file *file, void *priv,
1102                                 struct v4l2_frequency *f)
1103 {
1104         struct em28xx_fh      *fh  = priv;
1105         struct em28xx         *dev = fh->dev;
1106
1107         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1108         f->frequency = dev->ctl_freq;
1109
1110         return 0;
1111 }
1112
1113 static int vidioc_s_frequency(struct file *file, void *priv,
1114                                 struct v4l2_frequency *f)
1115 {
1116         struct em28xx_fh      *fh  = priv;
1117         struct em28xx         *dev = fh->dev;
1118         int                   rc;
1119
1120         rc = check_dev(dev);
1121         if (rc < 0)
1122                 return rc;
1123
1124         if (0 != f->tuner)
1125                 return -EINVAL;
1126
1127         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1128                 return -EINVAL;
1129         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1130                 return -EINVAL;
1131
1132         mutex_lock(&dev->lock);
1133
1134         dev->ctl_freq = f->frequency;
1135         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1136
1137         mutex_unlock(&dev->lock);
1138         return 0;
1139 }
1140
1141 #ifdef CONFIG_VIDEO_ADV_DEBUG
1142 static int em28xx_reg_len(int reg)
1143 {
1144         switch (reg) {
1145         case AC97LSB_REG:
1146         case HSCALELOW_REG:
1147         case VSCALELOW_REG:
1148                 return 2;
1149         default:
1150                 return 1;
1151         }
1152 }
1153
1154 static int vidioc_g_register(struct file *file, void *priv,
1155                              struct v4l2_register *reg)
1156 {
1157         struct em28xx_fh      *fh  = priv;
1158         struct em28xx         *dev = fh->dev;
1159         int ret;
1160
1161         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1162                 return -EINVAL;
1163
1164         if (em28xx_reg_len(reg->reg) == 1) {
1165                 ret = em28xx_read_reg(dev, reg->reg);
1166                 if (ret < 0)
1167                         return ret;
1168
1169                 reg->val = ret;
1170         } else {
1171                 u64 val = 0;
1172                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1173                                                    reg->reg, (char *)&val, 2);
1174                 if (ret < 0)
1175                         return ret;
1176
1177                 reg->val = cpu_to_le64((__u64)val);
1178         }
1179
1180         return 0;
1181 }
1182
1183 static int vidioc_s_register(struct file *file, void *priv,
1184                              struct v4l2_register *reg)
1185 {
1186         struct em28xx_fh      *fh  = priv;
1187         struct em28xx         *dev = fh->dev;
1188         u64 buf;
1189
1190         buf = le64_to_cpu((__u64)reg->val);
1191
1192         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1193                                  em28xx_reg_len(reg->reg));
1194 }
1195 #endif
1196
1197
1198 static int vidioc_cropcap(struct file *file, void *priv,
1199                                         struct v4l2_cropcap *cc)
1200 {
1201         struct em28xx_fh      *fh  = priv;
1202         struct em28xx         *dev = fh->dev;
1203
1204         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1205                 return -EINVAL;
1206
1207         cc->bounds.left = 0;
1208         cc->bounds.top = 0;
1209         cc->bounds.width = dev->width;
1210         cc->bounds.height = dev->height;
1211         cc->defrect = cc->bounds;
1212         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1213         cc->pixelaspect.denominator = 59;
1214
1215         return 0;
1216 }
1217
1218 static int vidioc_streamon(struct file *file, void *priv,
1219                                         enum v4l2_buf_type type)
1220 {
1221         struct em28xx_fh      *fh  = priv;
1222         struct em28xx         *dev = fh->dev;
1223         int                   rc;
1224
1225         rc = check_dev(dev);
1226         if (rc < 0)
1227                 return rc;
1228
1229
1230         if (unlikely(res_get(fh) < 0))
1231                 return -EBUSY;
1232
1233         return (videobuf_streamon(&fh->vb_vidq));
1234 }
1235
1236 static int vidioc_streamoff(struct file *file, void *priv,
1237                                         enum v4l2_buf_type type)
1238 {
1239         struct em28xx_fh      *fh  = priv;
1240         struct em28xx         *dev = fh->dev;
1241         int                   rc;
1242
1243         rc = check_dev(dev);
1244         if (rc < 0)
1245                 return rc;
1246
1247         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1248                 return -EINVAL;
1249         if (type != fh->type)
1250                 return -EINVAL;
1251
1252         videobuf_streamoff(&fh->vb_vidq);
1253         res_free(fh);
1254
1255         return 0;
1256 }
1257
1258 static int vidioc_querycap(struct file *file, void  *priv,
1259                                         struct v4l2_capability *cap)
1260 {
1261         struct em28xx_fh      *fh  = priv;
1262         struct em28xx         *dev = fh->dev;
1263
1264         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1265         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1266         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1267
1268         cap->version = EM28XX_VERSION_CODE;
1269
1270         cap->capabilities =
1271                         V4L2_CAP_SLICED_VBI_CAPTURE |
1272                         V4L2_CAP_VIDEO_CAPTURE |
1273                         V4L2_CAP_AUDIO |
1274                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1275
1276         if (dev->tuner_type != TUNER_ABSENT)
1277                 cap->capabilities |= V4L2_CAP_TUNER;
1278
1279         return 0;
1280 }
1281
1282 static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
1283                                         struct v4l2_fmtdesc *fmtd)
1284 {
1285         if (fmtd->index != 0)
1286                 return -EINVAL;
1287
1288         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1289         strcpy(fmtd->description, "Packed YUY2");
1290         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1291         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1292
1293         return 0;
1294 }
1295
1296 /* Sliced VBI ioctls */
1297 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1298                                         struct v4l2_format *f)
1299 {
1300         struct em28xx_fh      *fh  = priv;
1301         struct em28xx         *dev = fh->dev;
1302         int                   rc;
1303
1304         rc = check_dev(dev);
1305         if (rc < 0)
1306                 return rc;
1307
1308         mutex_lock(&dev->lock);
1309
1310         f->fmt.sliced.service_set = 0;
1311
1312         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1313
1314         if (f->fmt.sliced.service_set == 0)
1315                 rc = -EINVAL;
1316
1317         mutex_unlock(&dev->lock);
1318         return rc;
1319 }
1320
1321 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1322                         struct v4l2_format *f)
1323 {
1324         struct em28xx_fh      *fh  = priv;
1325         struct em28xx         *dev = fh->dev;
1326         int                   rc;
1327
1328         rc = check_dev(dev);
1329         if (rc < 0)
1330                 return rc;
1331
1332         mutex_lock(&dev->lock);
1333         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1334         mutex_unlock(&dev->lock);
1335
1336         if (f->fmt.sliced.service_set == 0)
1337                 return -EINVAL;
1338
1339         return 0;
1340 }
1341
1342
1343 static int vidioc_reqbufs(struct file *file, void *priv,
1344                           struct v4l2_requestbuffers *rb)
1345 {
1346         struct em28xx_fh      *fh  = priv;
1347         struct em28xx         *dev = fh->dev;
1348         int                   rc;
1349
1350         rc = check_dev(dev);
1351         if (rc < 0)
1352                 return rc;
1353
1354         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1355 }
1356
1357 static int vidioc_querybuf(struct file *file, void *priv,
1358                            struct v4l2_buffer *b)
1359 {
1360         struct em28xx_fh      *fh  = priv;
1361         struct em28xx         *dev = fh->dev;
1362         int                   rc;
1363
1364         rc = check_dev(dev);
1365         if (rc < 0)
1366                 return rc;
1367
1368         return (videobuf_querybuf(&fh->vb_vidq, b));
1369 }
1370
1371 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1372 {
1373         struct em28xx_fh      *fh  = priv;
1374         struct em28xx         *dev = fh->dev;
1375         int                   rc;
1376
1377         rc = check_dev(dev);
1378         if (rc < 0)
1379                 return rc;
1380
1381         return (videobuf_qbuf(&fh->vb_vidq, b));
1382 }
1383
1384 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1385 {
1386         struct em28xx_fh      *fh  = priv;
1387         struct em28xx         *dev = fh->dev;
1388         int                   rc;
1389
1390         rc = check_dev(dev);
1391         if (rc < 0)
1392                 return rc;
1393
1394         return (videobuf_dqbuf(&fh->vb_vidq, b,
1395                                 file->f_flags & O_NONBLOCK));
1396 }
1397
1398 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1399 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1400 {
1401         struct em28xx_fh  *fh = priv;
1402
1403         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1404 }
1405 #endif
1406
1407
1408 /* ----------------------------------------------------------- */
1409 /* RADIO ESPECIFIC IOCTLS                                      */
1410 /* ----------------------------------------------------------- */
1411
1412 static int radio_querycap(struct file *file, void  *priv,
1413                           struct v4l2_capability *cap)
1414 {
1415         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1416
1417         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1418         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1419         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1420
1421         cap->version = EM28XX_VERSION_CODE;
1422         cap->capabilities = V4L2_CAP_TUNER;
1423         return 0;
1424 }
1425
1426 static int radio_g_tuner(struct file *file, void *priv,
1427                          struct v4l2_tuner *t)
1428 {
1429         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1430
1431         if (unlikely(t->index > 0))
1432                 return -EINVAL;
1433
1434         strcpy(t->name, "Radio");
1435         t->type = V4L2_TUNER_RADIO;
1436
1437         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1438         return 0;
1439 }
1440
1441 static int radio_enum_input(struct file *file, void *priv,
1442                             struct v4l2_input *i)
1443 {
1444         if (i->index != 0)
1445                 return -EINVAL;
1446         strcpy(i->name, "Radio");
1447         i->type = V4L2_INPUT_TYPE_TUNER;
1448
1449         return 0;
1450 }
1451
1452 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1453 {
1454         if (unlikely(a->index))
1455                 return -EINVAL;
1456
1457         strcpy(a->name, "Radio");
1458         return 0;
1459 }
1460
1461 static int radio_s_tuner(struct file *file, void *priv,
1462                          struct v4l2_tuner *t)
1463 {
1464         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1465
1466         if (0 != t->index)
1467                 return -EINVAL;
1468
1469         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1470
1471         return 0;
1472 }
1473
1474 static int radio_s_audio(struct file *file, void *fh,
1475                          struct v4l2_audio *a)
1476 {
1477         return 0;
1478 }
1479
1480 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1481 {
1482         return 0;
1483 }
1484
1485 static int radio_queryctrl(struct file *file, void *priv,
1486                            struct v4l2_queryctrl *qc)
1487 {
1488         int i;
1489
1490         if (qc->id <  V4L2_CID_BASE ||
1491                 qc->id >= V4L2_CID_LASTP1)
1492                 return -EINVAL;
1493
1494         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1495                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1496                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1497                         return 0;
1498                 }
1499         }
1500
1501         return -EINVAL;
1502 }
1503
1504 /*
1505  * em28xx_v4l2_open()
1506  * inits the device and starts isoc transfer
1507  */
1508 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1509 {
1510         int minor = iminor(inode);
1511         int errCode = 0, radio = 0;
1512         struct em28xx *h, *dev = NULL;
1513         struct em28xx_fh *fh;
1514         enum v4l2_buf_type fh_type = 0;
1515
1516         list_for_each_entry(h, &em28xx_devlist, devlist) {
1517                 if (h->vdev->minor == minor) {
1518                         dev  = h;
1519                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1520                 }
1521                 if (h->vbi_dev->minor == minor) {
1522                         dev  = h;
1523                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1524                 }
1525                 if (h->radio_dev &&
1526                     h->radio_dev->minor == minor) {
1527                         radio = 1;
1528                         dev   = h;
1529                 }
1530         }
1531         if (NULL == dev)
1532                 return -ENODEV;
1533
1534         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1535                                 minor, v4l2_type_names[fh_type], dev->users);
1536
1537         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1538
1539         if (!fh) {
1540                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1541                 return -ENOMEM;
1542         }
1543         mutex_lock(&dev->lock);
1544         fh->dev = dev;
1545         fh->radio = radio;
1546         fh->type = fh_type;
1547         filp->private_data = fh;
1548
1549         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1550                 dev->width = norm_maxw(dev);
1551                 dev->height = norm_maxh(dev);
1552                 dev->hscale = 0;
1553                 dev->vscale = 0;
1554
1555                 em28xx_set_alternate(dev);
1556                 em28xx_resolution_set(dev);
1557
1558         }
1559         if (fh->radio) {
1560                 em28xx_videodbg("video_open: setting radio device\n");
1561                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1562         }
1563
1564         dev->users++;
1565
1566         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1567                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1568                         sizeof(struct em28xx_buffer), fh);
1569
1570         mutex_unlock(&dev->lock);
1571         return errCode;
1572 }
1573
1574 /*
1575  * em28xx_realease_resources()
1576  * unregisters the v4l2,i2c and usb devices
1577  * called when the device gets disconected or at module unload
1578 */
1579 static void em28xx_release_resources(struct em28xx *dev)
1580 {
1581
1582         /*FIXME: I2C IR should be disconnected */
1583
1584         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1585                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1586                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1587         list_del(&dev->devlist);
1588         if (dev->radio_dev) {
1589                 if (-1 != dev->radio_dev->minor)
1590                         video_unregister_device(dev->radio_dev);
1591                 else
1592                         video_device_release(dev->radio_dev);
1593                 dev->radio_dev = NULL;
1594         }
1595         if (dev->vbi_dev) {
1596                 if (-1 != dev->vbi_dev->minor)
1597                         video_unregister_device(dev->vbi_dev);
1598                 else
1599                         video_device_release(dev->vbi_dev);
1600                 dev->vbi_dev = NULL;
1601         }
1602         if (dev->vdev) {
1603                 if (-1 != dev->vdev->minor)
1604                         video_unregister_device(dev->vdev);
1605                 else
1606                         video_device_release(dev->vdev);
1607                 dev->vdev = NULL;
1608         }
1609         em28xx_i2c_unregister(dev);
1610         usb_put_dev(dev->udev);
1611
1612         /* Mark device as unused */
1613         em28xx_devused &= ~(1<<dev->devno);
1614 }
1615
1616 /*
1617  * em28xx_v4l2_close()
1618  * stops streaming and deallocates all resources allocated by the v4l2
1619  * calls and ioctls
1620  */
1621 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1622 {
1623         struct em28xx_fh *fh  = filp->private_data;
1624         struct em28xx    *dev = fh->dev;
1625         int              errCode;
1626
1627         em28xx_videodbg("users=%d\n", dev->users);
1628
1629
1630         if (res_check(fh))
1631                 res_free(fh);
1632
1633         mutex_lock(&dev->lock);
1634
1635         if (dev->users == 1) {
1636                 videobuf_stop(&fh->vb_vidq);
1637                 videobuf_mmap_free(&fh->vb_vidq);
1638
1639                 /* the device is already disconnect,
1640                    free the remaining resources */
1641                 if (dev->state & DEV_DISCONNECTED) {
1642                         em28xx_release_resources(dev);
1643                         mutex_unlock(&dev->lock);
1644                         kfree(dev);
1645                         return 0;
1646                 }
1647
1648                 /* do this before setting alternate! */
1649                 em28xx_uninit_isoc(dev);
1650
1651                 /* set alternate 0 */
1652                 dev->alt = 0;
1653                 em28xx_videodbg("setting alternate 0\n");
1654                 errCode = usb_set_interface(dev->udev, 0, 0);
1655                 if (errCode < 0) {
1656                         em28xx_errdev("cannot change alternate number to "
1657                                         "0 (error=%i)\n", errCode);
1658                 }
1659         }
1660         kfree(fh);
1661         dev->users--;
1662         wake_up_interruptible_nr(&dev->open, 1);
1663         mutex_unlock(&dev->lock);
1664         return 0;
1665 }
1666
1667 /*
1668  * em28xx_v4l2_read()
1669  * will allocate buffers when called for the first time
1670  */
1671 static ssize_t
1672 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1673                  loff_t *pos)
1674 {
1675         struct em28xx_fh *fh = filp->private_data;
1676         struct em28xx *dev = fh->dev;
1677         int rc;
1678
1679         rc = check_dev(dev);
1680         if (rc < 0)
1681                 return rc;
1682
1683         /* FIXME: read() is not prepared to allow changing the video
1684            resolution while streaming. Seems a bug at em28xx_set_fmt
1685          */
1686
1687         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1688                 if (unlikely(res_get(fh)))
1689                         return -EBUSY;
1690
1691                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1692                                         filp->f_flags & O_NONBLOCK);
1693         }
1694         return 0;
1695 }
1696
1697 /*
1698  * em28xx_v4l2_poll()
1699  * will allocate buffers when called for the first time
1700  */
1701 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1702 {
1703         struct em28xx_fh *fh = filp->private_data;
1704         struct em28xx *dev = fh->dev;
1705         int rc;
1706
1707         rc = check_dev(dev);
1708         if (rc < 0)
1709                 return rc;
1710
1711         if (unlikely(res_get(fh) < 0))
1712                 return POLLERR;
1713
1714         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1715                 return POLLERR;
1716
1717         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1718 }
1719
1720 /*
1721  * em28xx_v4l2_mmap()
1722  */
1723 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1724 {
1725         struct em28xx_fh *fh    = filp->private_data;
1726         struct em28xx    *dev   = fh->dev;
1727         int              rc;
1728
1729         if (unlikely(res_get(fh) < 0))
1730                 return -EBUSY;
1731
1732         rc = check_dev(dev);
1733         if (rc < 0)
1734                 return rc;
1735
1736         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1737
1738         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1739                 (unsigned long)vma->vm_start,
1740                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1741                 rc);
1742
1743         return rc;
1744 }
1745
1746 static const struct file_operations em28xx_v4l_fops = {
1747         .owner         = THIS_MODULE,
1748         .open          = em28xx_v4l2_open,
1749         .release       = em28xx_v4l2_close,
1750         .read          = em28xx_v4l2_read,
1751         .poll          = em28xx_v4l2_poll,
1752         .mmap          = em28xx_v4l2_mmap,
1753         .ioctl         = video_ioctl2,
1754         .llseek        = no_llseek,
1755         .compat_ioctl  = v4l_compat_ioctl32,
1756 };
1757
1758 static const struct file_operations radio_fops = {
1759         .owner         = THIS_MODULE,
1760         .open          = em28xx_v4l2_open,
1761         .release       = em28xx_v4l2_close,
1762         .ioctl         = video_ioctl2,
1763         .compat_ioctl  = v4l_compat_ioctl32,
1764         .llseek        = no_llseek,
1765 };
1766
1767 static const struct video_device em28xx_video_template = {
1768         .fops                       = &em28xx_v4l_fops,
1769         .release                    = video_device_release,
1770
1771         .minor                      = -1,
1772         .vidioc_querycap            = vidioc_querycap,
1773         .vidioc_enum_fmt_cap        = vidioc_enum_fmt_cap,
1774         .vidioc_g_fmt_cap           = vidioc_g_fmt_cap,
1775         .vidioc_try_fmt_cap         = vidioc_try_fmt_cap,
1776         .vidioc_s_fmt_cap           = vidioc_s_fmt_cap,
1777         .vidioc_g_audio             = vidioc_g_audio,
1778         .vidioc_s_audio             = vidioc_s_audio,
1779         .vidioc_cropcap             = vidioc_cropcap,
1780
1781         .vidioc_g_fmt_vbi_capture   = vidioc_g_fmt_vbi_capture,
1782         .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1783         .vidioc_s_fmt_vbi_capture   = vidioc_try_set_vbi_capture,
1784
1785         .vidioc_reqbufs             = vidioc_reqbufs,
1786         .vidioc_querybuf            = vidioc_querybuf,
1787         .vidioc_qbuf                = vidioc_qbuf,
1788         .vidioc_dqbuf               = vidioc_dqbuf,
1789         .vidioc_s_std               = vidioc_s_std,
1790         .vidioc_enum_input          = vidioc_enum_input,
1791         .vidioc_g_input             = vidioc_g_input,
1792         .vidioc_s_input             = vidioc_s_input,
1793         .vidioc_queryctrl           = vidioc_queryctrl,
1794         .vidioc_g_ctrl              = vidioc_g_ctrl,
1795         .vidioc_s_ctrl              = vidioc_s_ctrl,
1796         .vidioc_streamon            = vidioc_streamon,
1797         .vidioc_streamoff           = vidioc_streamoff,
1798         .vidioc_g_tuner             = vidioc_g_tuner,
1799         .vidioc_s_tuner             = vidioc_s_tuner,
1800         .vidioc_g_frequency         = vidioc_g_frequency,
1801         .vidioc_s_frequency         = vidioc_s_frequency,
1802 #ifdef CONFIG_VIDEO_ADV_DEBUG
1803         .vidioc_g_register          = vidioc_g_register,
1804         .vidioc_s_register          = vidioc_s_register,
1805 #endif
1806 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1807         .vidiocgmbuf                = vidiocgmbuf,
1808 #endif
1809
1810         .tvnorms                    = V4L2_STD_ALL,
1811         .current_norm               = V4L2_STD_PAL,
1812 };
1813
1814 static struct video_device em28xx_radio_template = {
1815         .name                 = "em28xx-radio",
1816         .type                 = VID_TYPE_TUNER,
1817         .fops                 = &radio_fops,
1818         .minor                = -1,
1819         .vidioc_querycap      = radio_querycap,
1820         .vidioc_g_tuner       = radio_g_tuner,
1821         .vidioc_enum_input    = radio_enum_input,
1822         .vidioc_g_audio       = radio_g_audio,
1823         .vidioc_s_tuner       = radio_s_tuner,
1824         .vidioc_s_audio       = radio_s_audio,
1825         .vidioc_s_input       = radio_s_input,
1826         .vidioc_queryctrl     = radio_queryctrl,
1827         .vidioc_g_ctrl        = vidioc_g_ctrl,
1828         .vidioc_s_ctrl        = vidioc_s_ctrl,
1829         .vidioc_g_frequency   = vidioc_g_frequency,
1830         .vidioc_s_frequency   = vidioc_s_frequency,
1831 #ifdef CONFIG_VIDEO_ADV_DEBUG
1832         .vidioc_g_register    = vidioc_g_register,
1833         .vidioc_s_register    = vidioc_s_register,
1834 #endif
1835 };
1836
1837 /******************************** usb interface ******************************/
1838
1839
1840 static LIST_HEAD(em28xx_extension_devlist);
1841 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1842
1843 int em28xx_register_extension(struct em28xx_ops *ops)
1844 {
1845         struct em28xx *h, *dev = NULL;
1846
1847         list_for_each_entry(h, &em28xx_devlist, devlist)
1848                 dev = h;
1849
1850         mutex_lock(&em28xx_extension_devlist_lock);
1851         list_add_tail(&ops->next, &em28xx_extension_devlist);
1852         if (dev)
1853                 ops->init(dev);
1854
1855         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1856         mutex_unlock(&em28xx_extension_devlist_lock);
1857
1858         return 0;
1859 }
1860 EXPORT_SYMBOL(em28xx_register_extension);
1861
1862 void em28xx_unregister_extension(struct em28xx_ops *ops)
1863 {
1864         struct em28xx *h, *dev = NULL;
1865
1866         list_for_each_entry(h, &em28xx_devlist, devlist)
1867                 dev = h;
1868
1869         if (dev)
1870                 ops->fini(dev);
1871
1872         mutex_lock(&em28xx_extension_devlist_lock);
1873         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1874         list_del(&ops->next);
1875         mutex_unlock(&em28xx_extension_devlist_lock);
1876 }
1877 EXPORT_SYMBOL(em28xx_unregister_extension);
1878
1879 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1880                                              const struct video_device *template,
1881                                              const int type,
1882                                              const char *type_name)
1883 {
1884         struct video_device *vfd;
1885
1886         vfd = video_device_alloc();
1887         if (NULL == vfd)
1888                 return NULL;
1889         *vfd = *template;
1890         vfd->minor   = -1;
1891         vfd->dev = &dev->udev->dev;
1892         vfd->release = video_device_release;
1893         vfd->type = type;
1894         vfd->debug = video_debug;
1895
1896         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1897                  dev->name, type_name);
1898
1899         return vfd;
1900 }
1901
1902
1903 /*
1904  * em28xx_init_dev()
1905  * allocates and inits the device structs, registers i2c bus and v4l device
1906  */
1907 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1908                            int minor)
1909 {
1910         struct em28xx_ops *ops = NULL;
1911         struct em28xx *dev = *devhandle;
1912         int retval = -ENOMEM;
1913         int errCode;
1914         unsigned int maxh, maxw;
1915
1916         dev->udev = udev;
1917         mutex_init(&dev->lock);
1918         spin_lock_init(&dev->slock);
1919         init_waitqueue_head(&dev->open);
1920         init_waitqueue_head(&dev->wait_frame);
1921         init_waitqueue_head(&dev->wait_stream);
1922
1923         dev->em28xx_write_regs = em28xx_write_regs;
1924         dev->em28xx_read_reg = em28xx_read_reg;
1925         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1926         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1927         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1928         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1929
1930         em28xx_pre_card_setup(dev);
1931
1932         errCode = em28xx_config(dev);
1933         if (errCode) {
1934                 em28xx_errdev("error configuring device\n");
1935                 em28xx_devused &= ~(1<<dev->devno);
1936                 kfree(dev);
1937                 return -ENOMEM;
1938         }
1939
1940         /* register i2c bus */
1941         em28xx_i2c_register(dev);
1942
1943         /* Do board specific init and eeprom reading */
1944         em28xx_card_setup(dev);
1945
1946         /* Configure audio */
1947         em28xx_audio_analog_set(dev);
1948
1949         /* configure the device */
1950         em28xx_config_i2c(dev);
1951
1952         /* set default norm */
1953         dev->norm = em28xx_video_template.current_norm;
1954
1955         maxw = norm_maxw(dev);
1956         maxh = norm_maxh(dev);
1957
1958         /* set default image size */
1959         dev->width = maxw;
1960         dev->height = maxh;
1961         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1962         dev->hscale = 0;
1963         dev->vscale = 0;
1964         dev->ctl_input = 2;
1965
1966         errCode = em28xx_config(dev);
1967
1968         list_add_tail(&dev->devlist, &em28xx_devlist);
1969
1970         /* allocate and fill video video_device struct */
1971         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1972                                           VID_TYPE_CAPTURE, "video");
1973         if (NULL == dev->vdev) {
1974                 em28xx_errdev("cannot allocate video_device.\n");
1975                 goto fail_unreg;
1976         }
1977         if (dev->tuner_type != TUNER_ABSENT)
1978                 dev->vdev->type |= VID_TYPE_TUNER;
1979
1980         /* register v4l2 video video_device */
1981         retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1982                                        video_nr[dev->devno]);
1983         if (retval) {
1984                 em28xx_errdev("unable to register video device (error=%i).\n",
1985                               retval);
1986                 goto fail_unreg;
1987         }
1988
1989         /* Allocate and fill vbi video_device struct */
1990         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1991                                           VFL_TYPE_VBI, "vbi");
1992         /* register v4l2 vbi video_device */
1993         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1994                                         vbi_nr[dev->devno]) < 0) {
1995                 em28xx_errdev("unable to register vbi device\n");
1996                 retval = -ENODEV;
1997                 goto fail_unreg;
1998         }
1999
2000         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2001                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2002                                         VFL_TYPE_RADIO, "radio");
2003                 if (NULL == dev->radio_dev) {
2004                         em28xx_errdev("cannot allocate video_device.\n");
2005                         goto fail_unreg;
2006                 }
2007                 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2008                                             radio_nr[dev->devno]);
2009                 if (retval < 0) {
2010                         em28xx_errdev("can't register radio device\n");
2011                         goto fail_unreg;
2012                 }
2013                 em28xx_info("Registered radio device as /dev/radio%d\n",
2014                             dev->radio_dev->minor & 0x1f);
2015         }
2016
2017         /* init video dma queues */
2018         INIT_LIST_HEAD(&dev->vidq.active);
2019         INIT_LIST_HEAD(&dev->vidq.queued);
2020
2021
2022         if (dev->has_msp34xx) {
2023                 /* Send a reset to other chips via gpio */
2024                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2025                 msleep(3);
2026                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2027                 msleep(3);
2028         }
2029
2030         video_mux(dev, 0);
2031
2032         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2033                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2034                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2035
2036         mutex_lock(&em28xx_extension_devlist_lock);
2037         if (!list_empty(&em28xx_extension_devlist)) {
2038                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2039                         if (ops->id)
2040                                 ops->init(dev);
2041                 }
2042         }
2043         mutex_unlock(&em28xx_extension_devlist_lock);
2044
2045         return 0;
2046
2047 fail_unreg:
2048         em28xx_release_resources(dev);
2049         mutex_unlock(&dev->lock);
2050         kfree(dev);
2051         return retval;
2052 }
2053
2054 #if defined(CONFIG_MODULES) && defined(MODULE)
2055 static void request_module_async(struct work_struct *work)
2056 {
2057         struct em28xx *dev = container_of(work,
2058                              struct em28xx, request_module_wk);
2059
2060         if (dev->has_audio_class)
2061                 request_module("snd-usb-audio");
2062         else
2063                 request_module("em28xx-alsa");
2064
2065         if (dev->has_dvb)
2066                 request_module("em28xx-dvb");
2067 }
2068
2069 static void request_modules(struct em28xx *dev)
2070 {
2071         INIT_WORK(&dev->request_module_wk, request_module_async);
2072         schedule_work(&dev->request_module_wk);
2073 }
2074 #else
2075 #define request_modules(dev)
2076 #endif /* CONFIG_MODULES */
2077
2078 /*
2079  * em28xx_usb_probe()
2080  * checks for supported devices
2081  */
2082 static int em28xx_usb_probe(struct usb_interface *interface,
2083                             const struct usb_device_id *id)
2084 {
2085         const struct usb_endpoint_descriptor *endpoint;
2086         struct usb_device *udev;
2087         struct usb_interface *uif;
2088         struct em28xx *dev = NULL;
2089         int retval = -ENODEV;
2090         int i, nr, ifnum;
2091
2092         udev = usb_get_dev(interface_to_usbdev(interface));
2093         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2094
2095         /* Check to see next free device and mark as used */
2096         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2097         em28xx_devused |= 1<<nr;
2098
2099         /* Don't register audio interfaces */
2100         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2101                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2102                                 udev->descriptor.idVendor,
2103                                 udev->descriptor.idProduct,
2104                                 ifnum,
2105                                 interface->altsetting[0].desc.bInterfaceClass);
2106
2107                 em28xx_devused &= ~(1<<nr);
2108                 return -ENODEV;
2109         }
2110
2111         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2112                         udev->descriptor.idVendor,
2113                         udev->descriptor.idProduct,
2114                         ifnum,
2115                         interface->altsetting[0].desc.bInterfaceClass);
2116
2117         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2118
2119         /* check if the device has the iso in endpoint at the correct place */
2120         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2121             USB_ENDPOINT_XFER_ISOC) {
2122                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2123                 em28xx_devused &= ~(1<<nr);
2124                 return -ENODEV;
2125         }
2126         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2127                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2128                 em28xx_devused &= ~(1<<nr);
2129                 return -ENODEV;
2130         }
2131
2132         if (nr >= EM28XX_MAXBOARDS) {
2133                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2134                                 EM28XX_MAXBOARDS);
2135                 em28xx_devused &= ~(1<<nr);
2136                 return -ENOMEM;
2137         }
2138
2139         /* allocate memory for our device state and initialize it */
2140         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2141         if (dev == NULL) {
2142                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2143                 em28xx_devused &= ~(1<<nr);
2144                 return -ENOMEM;
2145         }
2146
2147         snprintf(dev->name, 29, "em28xx #%d", nr);
2148         dev->devno = nr;
2149         dev->model = id->driver_info;
2150         dev->alt   = -1;
2151
2152         /* Checks if audio is provided by some interface */
2153         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2154                 uif = udev->config->interface[i];
2155                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2156                         dev->has_audio_class = 1;
2157                         break;
2158                 }
2159         }
2160
2161         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2162                    dev->has_audio_class ? "Has" : "Doesn't have");
2163
2164         /* compute alternate max packet sizes */
2165         uif = udev->actconfig->interface[0];
2166
2167         dev->num_alt = uif->num_altsetting;
2168         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2169 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2170         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2171
2172         if (dev->alt_max_pkt_size == NULL) {
2173                 em28xx_errdev("out of memory!\n");
2174                 em28xx_devused &= ~(1<<nr);
2175                 kfree(dev);
2176                 return -ENOMEM;
2177         }
2178
2179         for (i = 0; i < dev->num_alt ; i++) {
2180                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2181                                                         wMaxPacketSize);
2182                 dev->alt_max_pkt_size[i] =
2183                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2184                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2185                                                 dev->alt_max_pkt_size[i]);
2186         }
2187
2188         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2189                 dev->model = card[nr];
2190
2191         /* allocate device struct */
2192         retval = em28xx_init_dev(&dev, udev, nr);
2193         if (retval)
2194                 return retval;
2195
2196         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2197
2198         /* save our data pointer in this interface device */
2199         usb_set_intfdata(interface, dev);
2200
2201         request_modules(dev);
2202
2203         return 0;
2204 }
2205
2206 /*
2207  * em28xx_usb_disconnect()
2208  * called when the device gets diconencted
2209  * video device will be unregistered on v4l2_close in case it is still open
2210  */
2211 static void em28xx_usb_disconnect(struct usb_interface *interface)
2212 {
2213         struct em28xx *dev;
2214         struct em28xx_ops *ops = NULL;
2215
2216         dev = usb_get_intfdata(interface);
2217         usb_set_intfdata(interface, NULL);
2218
2219         if (!dev)
2220                 return;
2221
2222         em28xx_info("disconnecting %s\n", dev->vdev->name);
2223
2224         /* wait until all current v4l2 io is finished then deallocate
2225            resources */
2226         mutex_lock(&dev->lock);
2227
2228         wake_up_interruptible_all(&dev->open);
2229
2230         if (dev->users) {
2231                 em28xx_warn
2232                     ("device /dev/video%d is open! Deregistration and memory "
2233                      "deallocation are deferred on close.\n",
2234                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2235
2236                 dev->state |= DEV_MISCONFIGURED;
2237                 em28xx_uninit_isoc(dev);
2238                 dev->state |= DEV_DISCONNECTED;
2239                 wake_up_interruptible(&dev->wait_frame);
2240                 wake_up_interruptible(&dev->wait_stream);
2241         } else {
2242                 dev->state |= DEV_DISCONNECTED;
2243                 em28xx_release_resources(dev);
2244         }
2245         mutex_unlock(&dev->lock);
2246
2247         mutex_lock(&em28xx_extension_devlist_lock);
2248         if (!list_empty(&em28xx_extension_devlist)) {
2249                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2250                         ops->fini(dev);
2251                 }
2252         }
2253         mutex_unlock(&em28xx_extension_devlist_lock);
2254
2255         if (!dev->users) {
2256                 kfree(dev->alt_max_pkt_size);
2257                 kfree(dev);
2258         }
2259 }
2260
2261 static struct usb_driver em28xx_usb_driver = {
2262         .name = "em28xx",
2263         .probe = em28xx_usb_probe,
2264         .disconnect = em28xx_usb_disconnect,
2265         .id_table = em28xx_id_table,
2266 };
2267
2268 static int __init em28xx_module_init(void)
2269 {
2270         int result;
2271
2272         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2273                (EM28XX_VERSION_CODE >> 16) & 0xff,
2274                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2275 #ifdef SNAPSHOT
2276         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2277                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2278 #endif
2279
2280         /* register this driver with the USB subsystem */
2281         result = usb_register(&em28xx_usb_driver);
2282         if (result)
2283                 em28xx_err(DRIVER_NAME
2284                            " usb_register failed. Error number %d.\n", result);
2285
2286         return result;
2287 }
2288
2289 static void __exit em28xx_module_exit(void)
2290 {
2291         /* deregister this driver with the USB subsystem */
2292         usb_deregister(&em28xx_usb_driver);
2293 }
2294
2295 module_init(em28xx_module_init);
2296 module_exit(em28xx_module_exit);