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

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/version.h>
  36 #include <linux/mm.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/msp3400.h>
  43 #include <media/tuner.h>
  44
  45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  46                       "Markus Rechberger <mrechberger@gmail.com>, " \
  47                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  48                       "Sascha Sommer <saschasommer@freenet.de>"
  49
  50 #define DRIVER_NAME         "em28xx"
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
  53
  54 #define em28xx_videodbg(fmt, arg...) do {\
  55         if (video_debug) \
  56                 printk(KERN_INFO "%s %s :"fmt, \
  57                          dev->name, __func__ , ##arg); } while (0)
  58
  59 static unsigned int isoc_debug;
  60 module_param(isoc_debug, int, 0644);
  61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  62
  63 #define em28xx_isocdbg(fmt, arg...) \
  64 do {\
  65         if (isoc_debug) { \
  66                 printk(KERN_INFO "%s %s :"fmt, \
  67                          dev->name, __func__ , ##arg); \
  68         } \
  69   } while (0)
  70
  71 MODULE_AUTHOR(DRIVER_AUTHOR);
  72 MODULE_DESCRIPTION(DRIVER_DESC);
  73 MODULE_LICENSE("GPL");
  74
  75 static LIST_HEAD(em28xx_devlist);
  76 static DEFINE_MUTEX(em28xx_devlist_mutex);
  77
  78 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  81 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  82
  83 module_param_array(card,  int, NULL, 0444);
  84 module_param_array(video_nr, int, NULL, 0444);
  85 module_param_array(vbi_nr, int, NULL, 0444);
  86 module_param_array(radio_nr, int, NULL, 0444);
  87 MODULE_PARM_DESC(card,     "card type");
  88 MODULE_PARM_DESC(video_nr, "video device numbers");
  89 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  90 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  91
  92 static unsigned int video_debug;
  93 module_param(video_debug, int, 0644);
  94 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  95
  96 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  97 static unsigned long em28xx_devused;
  98
  99 /* supported controls */
 100 /* Common to all boards */
 101 static struct v4l2_queryctrl em28xx_qctrl[] = {
 102         {
 103                 .id = V4L2_CID_AUDIO_VOLUME,
 104                 .type = V4L2_CTRL_TYPE_INTEGER,
 105                 .name = "Volume",
 106                 .minimum = 0x0,
 107                 .maximum = 0x1f,
 108                 .step = 0x1,
 109                 .default_value = 0x1f,
 110                 .flags = 0,
 111         }, {
 112                 .id = V4L2_CID_AUDIO_MUTE,
 113                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 114                 .name = "Mute",
 115                 .minimum = 0,
 116                 .maximum = 1,
 117                 .step = 1,
 118                 .default_value = 1,
 119                 .flags = 0,
 120         }
 121 };
 122
 123 static struct usb_driver em28xx_usb_driver;
 124
 125 /* ------------------------------------------------------------------
 126         DMA and thread functions
 127    ------------------------------------------------------------------*/
 128
 129 /*
 130  * Announces that a buffer were filled and request the next
 131  */
 132 static inline void buffer_filled(struct em28xx *dev,
 133                                   struct em28xx_dmaqueue *dma_q,
 134                                   struct em28xx_buffer *buf)
 135 {
 136         /* Advice that buffer was filled */
 137         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 138         buf->vb.state = VIDEOBUF_DONE;
 139         buf->vb.field_count++;
 140         do_gettimeofday(&buf->vb.ts);
 141
 142         dev->isoc_ctl.buf = NULL;
 143
 144         list_del(&buf->vb.queue);
 145         wake_up(&buf->vb.done);
 146 }
 147
 148 /*
 149  * Identify the buffer header type and properly handles
 150  */
 151 static void em28xx_copy_video(struct em28xx *dev,
 152                               struct em28xx_dmaqueue  *dma_q,
 153                               struct em28xx_buffer *buf,
 154                               unsigned char *p,
 155                               unsigned char *outp, unsigned long len)
 156 {
 157         void *fieldstart, *startwrite, *startread;
 158         int  linesdone, currlinedone, offset, lencopy, remain;
 159         int bytesperline = dev->width << 1;
 160
 161         if (dma_q->pos + len > buf->vb.size)
 162                 len = buf->vb.size - dma_q->pos;
 163
 164         if (p[0] != 0x88 && p[0] != 0x22) {
 165                 em28xx_isocdbg("frame is not complete\n");
 166                 len += 4;
 167         } else
 168                 p += 4;
 169
 170         startread = p;
 171         remain = len;
 172
 173         /* Interlaces frame */
 174         if (buf->top_field)
 175                 fieldstart = outp;
 176         else
 177                 fieldstart = outp + bytesperline;
 178
 179         linesdone = dma_q->pos / bytesperline;
 180         currlinedone = dma_q->pos % bytesperline;
 181         offset = linesdone * bytesperline * 2 + currlinedone;
 182         startwrite = fieldstart + offset;
 183         lencopy = bytesperline - currlinedone;
 184         lencopy = lencopy > remain ? remain : lencopy;
 185
 186         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 187                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 188                                ((char *)startwrite + lencopy) -
 189                                ((char *)outp + buf->vb.size));
 190                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 191         }
 192         if (lencopy <= 0)
 193                 return;
 194         memcpy(startwrite, startread, lencopy);
 195
 196         remain -= lencopy;
 197
 198         while (remain > 0) {
 199                 startwrite += lencopy + bytesperline;
 200                 startread += lencopy;
 201                 if (bytesperline > remain)
 202                         lencopy = remain;
 203                 else
 204                         lencopy = bytesperline;
 205
 206                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 207                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 208                                        ((char *)startwrite + lencopy) -
 209                                        ((char *)outp + buf->vb.size));
 210                         lencopy = remain = (char *)outp + buf->vb.size -
 211                                            (char *)startwrite;
 212                 }
 213                 if (lencopy <= 0)
 214                         break;
 215
 216                 memcpy(startwrite, startread, lencopy);
 217
 218                 remain -= lencopy;
 219         }
 220
 221         dma_q->pos += len;
 222 }
 223
 224 static inline void print_err_status(struct em28xx *dev,
 225                                      int packet, int status)
 226 {
 227         char *errmsg = "Unknown";
 228
 229         switch (status) {
 230         case -ENOENT:
 231                 errmsg = "unlinked synchronuously";
 232                 break;
 233         case -ECONNRESET:
 234                 errmsg = "unlinked asynchronuously";
 235                 break;
 236         case -ENOSR:
 237                 errmsg = "Buffer error (overrun)";
 238                 break;
 239         case -EPIPE:
 240                 errmsg = "Stalled (device not responding)";
 241                 break;
 242         case -EOVERFLOW:
 243                 errmsg = "Babble (bad cable?)";
 244                 break;
 245         case -EPROTO:
 246                 errmsg = "Bit-stuff error (bad cable?)";
 247                 break;
 248         case -EILSEQ:
 249                 errmsg = "CRC/Timeout (could be anything)";
 250                 break;
 251         case -ETIME:
 252                 errmsg = "Device does not respond";
 253                 break;
 254         }
 255         if (packet < 0) {
 256                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 257         } else {
 258                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 259                                packet, status, errmsg);
 260         }
 261 }
 262
 263 /*
 264  * video-buf generic routine to get the next available buffer
 265  */
 266 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 267                                           struct em28xx_buffer **buf)
 268 {
 269         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 270         char *outp;
 271
 272         if (list_empty(&dma_q->active)) {
 273                 em28xx_isocdbg("No active queue to serve\n");
 274                 dev->isoc_ctl.buf = NULL;
 275                 *buf = NULL;
 276                 return;
 277         }
 278
 279         /* Get the next buffer */
 280         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 281
 282         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 283         outp = videobuf_to_vmalloc(&(*buf)->vb);
 284         memset(outp, 0, (*buf)->vb.size);
 285
 286         dev->isoc_ctl.buf = *buf;
 287
 288         return;
 289 }
 290
 291 /*
 292  * Controls the isoc copy of each urb packet
 293  */
 294 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 295 {
 296         struct em28xx_buffer    *buf;
 297         struct em28xx_dmaqueue  *dma_q = urb->context;
 298         unsigned char *outp = NULL;
 299         int i, len = 0, rc = 1;
 300         unsigned char *p;
 301
 302         if (!dev)
 303                 return 0;
 304
 305         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 306                 return 0;
 307
 308         if (urb->status < 0) {
 309                 print_err_status(dev, -1, urb->status);
 310                 if (urb->status == -ENOENT)
 311                         return 0;
 312         }
 313
 314         buf = dev->isoc_ctl.buf;
 315         if (buf != NULL)
 316                 outp = videobuf_to_vmalloc(&buf->vb);
 317
 318         for (i = 0; i < urb->number_of_packets; i++) {
 319                 int status = urb->iso_frame_desc[i].status;
 320
 321                 if (status < 0) {
 322                         print_err_status(dev, i, status);
 323                         if (urb->iso_frame_desc[i].status != -EPROTO)
 324                                 continue;
 325                 }
 326
 327                 len = urb->iso_frame_desc[i].actual_length - 4;
 328
 329                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 330                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 331                         continue;
 332                 }
 333                 if (urb->iso_frame_desc[i].actual_length >
 334                                                 dev->max_pkt_size) {
 335                         em28xx_isocdbg("packet bigger than packet size");
 336                         continue;
 337                 }
 338
 339                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 340
 341                 /* FIXME: incomplete buffer checks where removed to make
 342                    logic simpler. Impacts of those changes should be evaluated
 343                  */
 344                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 345                         em28xx_isocdbg("VBI HEADER!!!\n");
 346                         /* FIXME: Should add vbi copy */
 347                         continue;
 348                 }
 349                 if (p[0] == 0x22 && p[1] == 0x5a) {
 350                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 351                                        len, (p[2] & 1)? "odd" : "even");
 352
 353                         if (!(p[2] & 1)) {
 354                                 if (buf != NULL)
 355                                         buffer_filled(dev, dma_q, buf);
 356                                 get_next_buf(dma_q, &buf);
 357                                 if (buf == NULL)
 358                                         outp = NULL;
 359                                 else
 360                                         outp = videobuf_to_vmalloc(&buf->vb);
 361                         }
 362
 363                         if (buf != NULL) {
 364                                 if (p[2] & 1)
 365                                         buf->top_field = 0;
 366                                 else
 367                                         buf->top_field = 1;
 368                         }
 369
 370                         dma_q->pos = 0;
 371                 }
 372                 if (buf != NULL)
 373                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 374         }
 375         return rc;
 376 }
 377
 378 /* ------------------------------------------------------------------
 379         Videobuf operations
 380    ------------------------------------------------------------------*/
 381
 382 static int
 383 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 384 {
 385         struct em28xx_fh *fh = vq->priv_data;
 386         struct em28xx        *dev = fh->dev;
 387         struct v4l2_frequency f;
 388
 389         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 390         if (0 == *count)
 391                 *count = EM28XX_DEF_BUF;
 392
 393         if (*count < EM28XX_MIN_BUF)
 394                 *count = EM28XX_MIN_BUF;
 395
 396         /* Ask tuner to go to analog mode */
 397         memset(&f, 0, sizeof(f));
 398         f.frequency = dev->ctl_freq;
 399
 400         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 401
 402         return 0;
 403 }
 404
 405 /* This is called *without* dev->slock held; please keep it that way */
 406 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 407 {
 408         struct em28xx_fh     *fh  = vq->priv_data;
 409         struct em28xx        *dev = fh->dev;
 410         unsigned long flags = 0;
 411         if (in_interrupt())
 412                 BUG();
 413
 414         /* We used to wait for the buffer to finish here, but this didn't work
 415            because, as we were keeping the state as VIDEOBUF_QUEUED,
 416            videobuf_queue_cancel marked it as finished for us.
 417            (Also, it could wedge forever if the hardware was misconfigured.)
 418
 419            This should be safe; by the time we get here, the buffer isn't
 420            queued anymore. If we ever start marking the buffers as
 421            VIDEOBUF_ACTIVE, it won't be, though.
 422         */
 423         spin_lock_irqsave(&dev->slock, flags);
 424         if (dev->isoc_ctl.buf == buf)
 425                 dev->isoc_ctl.buf = NULL;
 426         spin_unlock_irqrestore(&dev->slock, flags);
 427
 428         videobuf_vmalloc_free(&buf->vb);
 429         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 430 }
 431
 432 static int
 433 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 434                                                 enum v4l2_field field)
 435 {
 436         struct em28xx_fh     *fh  = vq->priv_data;
 437         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 438         struct em28xx        *dev = fh->dev;
 439         int                  rc = 0, urb_init = 0;
 440
 441         /* FIXME: It assumes depth = 16 */
 442         /* The only currently supported format is 16 bits/pixel */
 443         buf->vb.size = 16 * dev->width * dev->height >> 3;
 444
 445         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 446                 return -EINVAL;
 447
 448         buf->vb.width  = dev->width;
 449         buf->vb.height = dev->height;
 450         buf->vb.field  = field;
 451
 452         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 453                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 454                 if (rc < 0)
 455                         goto fail;
 456         }
 457
 458         if (!dev->isoc_ctl.num_bufs)
 459                 urb_init = 1;
 460
 461         if (urb_init) {
 462                 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 463                                       EM28XX_NUM_BUFS, dev->max_pkt_size,
 464                                       em28xx_isoc_copy);
 465                 if (rc < 0)
 466                         goto fail;
 467         }
 468
 469         buf->vb.state = VIDEOBUF_PREPARED;
 470         return 0;
 471
 472 fail:
 473         free_buffer(vq, buf);
 474         return rc;
 475 }
 476
 477 static void
 478 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 479 {
 480         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 481         struct em28xx_fh        *fh      = vq->priv_data;
 482         struct em28xx           *dev     = fh->dev;
 483         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 484
 485         buf->vb.state = VIDEOBUF_QUEUED;
 486         list_add_tail(&buf->vb.queue, &vidq->active);
 487
 488 }
 489
 490 static void buffer_release(struct videobuf_queue *vq,
 491                                 struct videobuf_buffer *vb)
 492 {
 493         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 494         struct em28xx_fh       *fh   = vq->priv_data;
 495         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 496
 497         em28xx_isocdbg("em28xx: called buffer_release\n");
 498
 499         free_buffer(vq, buf);
 500 }
 501
 502 static struct videobuf_queue_ops em28xx_video_qops = {
 503         .buf_setup      = buffer_setup,
 504         .buf_prepare    = buffer_prepare,
 505         .buf_queue      = buffer_queue,
 506         .buf_release    = buffer_release,
 507 };
 508
 509 /*********************  v4l2 interface  **************************************/
 510
 511 /*
 512  * em28xx_config()
 513  * inits registers with sane defaults
 514  */
 515 static int em28xx_config(struct em28xx *dev)
 516 {
 517         int retval;
 518
 519         /* Sets I2C speed to 100 KHz */
 520         if (!dev->is_em2800) {
 521                 retval = em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 522                 if (retval < 0) {
 523                         em28xx_errdev("%s: em28xx_write_regs_req failed! retval [%d]\n",
 524                                 __func__, retval);
 525                         return retval;
 526                 }
 527         }
 528
 529         /* enable vbi capturing */
 530
 531 /*      em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
 532 /*      em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
 533         em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
 534
 535         dev->mute = 1;          /* maybe not the right place... */
 536         dev->volume = 0x1f;
 537
 538         em28xx_outfmt_set_yuv422(dev);
 539         em28xx_colorlevels_set_default(dev);
 540         em28xx_compression_disable(dev);
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * em28xx_config_i2c()
 547  * configure i2c attached devices
 548  */
 549 static void em28xx_config_i2c(struct em28xx *dev)
 550 {
 551         struct v4l2_routing route;
 552         int zero = 0;
 553
 554         route.input = INPUT(dev->ctl_input)->vmux;
 555         route.output = 0;
 556         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, &zero);
 557         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 558         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 559 }
 560
 561 static void video_mux(struct em28xx *dev, int index)
 562 {
 563         struct v4l2_routing route;
 564
 565         route.input = INPUT(index)->vmux;
 566         route.output = 0;
 567         dev->ctl_input = index;
 568         dev->ctl_ainput = INPUT(index)->amux;
 569         dev->ctl_aoutput = INPUT(index)->aout;
 570
 571         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 572
 573         if (dev->has_msp34xx) {
 574                 if (dev->i2s_speed) {
 575                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 576                                 &dev->i2s_speed);
 577                 }
 578                 route.input = dev->ctl_ainput;
 579                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 580                 /* Note: this is msp3400 specific */
 581                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 582                         &route);
 583         }
 584
 585         em28xx_audio_analog_set(dev);
 586 }
 587
 588 /* Usage lock check functions */
 589 static int res_get(struct em28xx_fh *fh)
 590 {
 591         struct em28xx    *dev = fh->dev;
 592         int              rc   = 0;
 593
 594         /* This instance already has stream_on */
 595         if (fh->stream_on)
 596                 return rc;
 597
 598         if (dev->stream_on)
 599                 return -EINVAL;
 600
 601         mutex_lock(&dev->lock);
 602         dev->stream_on = 1;
 603         fh->stream_on  = 1;
 604         mutex_unlock(&dev->lock);
 605         return rc;
 606 }
 607
 608 static int res_check(struct em28xx_fh *fh)
 609 {
 610         return (fh->stream_on);
 611 }
 612
 613 static void res_free(struct em28xx_fh *fh)
 614 {
 615         struct em28xx    *dev = fh->dev;
 616
 617         mutex_lock(&dev->lock);
 618         fh->stream_on = 0;
 619         dev->stream_on = 0;
 620         mutex_unlock(&dev->lock);
 621 }
 622
 623 /*
 624  * em28xx_get_ctrl()
 625  * return the current saturation, brightness or contrast, mute state
 626  */
 627 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 628 {
 629         switch (ctrl->id) {
 630         case V4L2_CID_AUDIO_MUTE:
 631                 ctrl->value = dev->mute;
 632                 return 0;
 633         case V4L2_CID_AUDIO_VOLUME:
 634                 ctrl->value = dev->volume;
 635                 return 0;
 636         default:
 637                 return -EINVAL;
 638         }
 639 }
 640
 641 /*
 642  * em28xx_set_ctrl()
 643  * mute or set new saturation, brightness or contrast
 644  */
 645 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 646 {
 647         switch (ctrl->id) {
 648         case V4L2_CID_AUDIO_MUTE:
 649                 if (ctrl->value != dev->mute) {
 650                         dev->mute = ctrl->value;
 651                         return em28xx_audio_analog_set(dev);
 652                 }
 653                 return 0;
 654         case V4L2_CID_AUDIO_VOLUME:
 655                 dev->volume = ctrl->value;
 656                 return em28xx_audio_analog_set(dev);
 657         default:
 658                 return -EINVAL;
 659         }
 660 }
 661
 662 static int check_dev(struct em28xx *dev)
 663 {
 664         if (dev->state & DEV_DISCONNECTED) {
 665                 em28xx_errdev("v4l2 ioctl: device not present\n");
 666                 return -ENODEV;
 667         }
 668
 669         if (dev->state & DEV_MISCONFIGURED) {
 670                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 671                               "close and open it again\n");
 672                 return -EIO;
 673         }
 674         return 0;
 675 }
 676
 677 static void get_scale(struct em28xx *dev,
 678                         unsigned int width, unsigned int height,
 679                         unsigned int *hscale, unsigned int *vscale)
 680 {
 681         unsigned int          maxw   = norm_maxw(dev);
 682         unsigned int          maxh   = norm_maxh(dev);
 683
 684         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 685         if (*hscale >= 0x4000)
 686                 *hscale = 0x3fff;
 687
 688         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 689         if (*vscale >= 0x4000)
 690                 *vscale = 0x3fff;
 691 }
 692
 693 /* ------------------------------------------------------------------
 694         IOCTL vidioc handling
 695    ------------------------------------------------------------------*/
 696
 697 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 698                                         struct v4l2_format *f)
 699 {
 700         struct em28xx_fh      *fh  = priv;
 701         struct em28xx         *dev = fh->dev;
 702
 703         mutex_lock(&dev->lock);
 704
 705         f->fmt.pix.width = dev->width;
 706         f->fmt.pix.height = dev->height;
 707         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 708         f->fmt.pix.bytesperline = dev->width * 2;
 709         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 710         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 711
 712         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 713         f->fmt.pix.field = dev->interlaced ?
 714                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 715
 716         mutex_unlock(&dev->lock);
 717         return 0;
 718 }
 719
 720 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 721                         struct v4l2_format *f)
 722 {
 723         struct em28xx_fh      *fh    = priv;
 724         struct em28xx         *dev   = fh->dev;
 725         int                   width  = f->fmt.pix.width;
 726         int                   height = f->fmt.pix.height;
 727         unsigned int          maxw   = norm_maxw(dev);
 728         unsigned int          maxh   = norm_maxh(dev);
 729         unsigned int          hscale, vscale;
 730
 731         /* width must even because of the YUYV format
 732            height must be even because of interlacing */
 733         height &= 0xfffe;
 734         width &= 0xfffe;
 735
 736         if (height < 32)
 737                 height = 32;
 738         if (height > maxh)
 739                 height = maxh;
 740         if (width < 48)
 741                 width = 48;
 742         if (width > maxw)
 743                 width = maxw;
 744
 745         mutex_lock(&dev->lock);
 746
 747         if (dev->is_em2800) {
 748                 /* the em2800 can only scale down to 50% */
 749                 if (height % (maxh / 2))
 750                         height = maxh;
 751                 if (width % (maxw / 2))
 752                         width = maxw;
 753                 /* according to empiatech support */
 754                 /* the MaxPacketSize is to small to support */
 755                 /* framesizes larger than 640x480 @ 30 fps */
 756                 /* or 640x576 @ 25 fps. As this would cut */
 757                 /* of a part of the image we prefer */
 758                 /* 360x576 or 360x480 for now */
 759                 if (width == maxw && height == maxh)
 760                         width /= 2;
 761         }
 762
 763         get_scale(dev, width, height, &hscale, &vscale);
 764
 765         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 766         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 767
 768         f->fmt.pix.width = width;
 769         f->fmt.pix.height = height;
 770         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 771         f->fmt.pix.bytesperline = width * 2;
 772         f->fmt.pix.sizeimage = width * 2 * height;
 773         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 774         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 775
 776         mutex_unlock(&dev->lock);
 777         return 0;
 778 }
 779
 780 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 781                         struct v4l2_format *f)
 782 {
 783         struct em28xx_fh      *fh  = priv;
 784         struct em28xx         *dev = fh->dev;
 785         int                   rc;
 786
 787         rc = check_dev(dev);
 788         if (rc < 0)
 789                 return rc;
 790
 791         vidioc_try_fmt_vid_cap(file, priv, f);
 792
 793         mutex_lock(&dev->lock);
 794
 795         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 796                 em28xx_errdev("%s queue busy\n", __func__);
 797                 rc = -EBUSY;
 798                 goto out;
 799         }
 800
 801         if (dev->stream_on && !fh->stream_on) {
 802                 em28xx_errdev("%s device in use by another fh\n", __func__);
 803                 rc = -EBUSY;
 804                 goto out;
 805         }
 806
 807         /* set new image size */
 808         dev->width = f->fmt.pix.width;
 809         dev->height = f->fmt.pix.height;
 810         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 811
 812         em28xx_set_alternate(dev);
 813         em28xx_resolution_set(dev);
 814
 815         rc = 0;
 816
 817 out:
 818         mutex_unlock(&dev->lock);
 819         return rc;
 820 }
 821
 822 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 823 {
 824         struct em28xx_fh   *fh  = priv;
 825         struct em28xx      *dev = fh->dev;
 826         struct v4l2_format f;
 827         int                rc;
 828
 829         rc = check_dev(dev);
 830         if (rc < 0)
 831                 return rc;
 832
 833         mutex_lock(&dev->lock);
 834         dev->norm = *norm;
 835         mutex_unlock(&dev->lock);
 836
 837         /* Adjusts width/height, if needed */
 838         f.fmt.pix.width = dev->width;
 839         f.fmt.pix.height = dev->height;
 840         vidioc_try_fmt_vid_cap(file, priv, &f);
 841
 842         mutex_lock(&dev->lock);
 843
 844         /* set new image size */
 845         dev->width = f.fmt.pix.width;
 846         dev->height = f.fmt.pix.height;
 847         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 848
 849         em28xx_resolution_set(dev);
 850         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 851
 852         mutex_unlock(&dev->lock);
 853         return 0;
 854 }
 855
 856 static const char *iname[] = {
 857         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 858         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 859         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 860         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 861         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 862         [EM28XX_VMUX_TELEVISION] = "Television",
 863         [EM28XX_VMUX_CABLE]      = "Cable TV",
 864         [EM28XX_VMUX_DVB]        = "DVB",
 865         [EM28XX_VMUX_DEBUG]      = "for debug only",
 866 };
 867
 868 static int vidioc_enum_input(struct file *file, void *priv,
 869                                 struct v4l2_input *i)
 870 {
 871         struct em28xx_fh   *fh  = priv;
 872         struct em28xx      *dev = fh->dev;
 873         unsigned int       n;
 874
 875         n = i->index;
 876         if (n >= MAX_EM28XX_INPUT)
 877                 return -EINVAL;
 878         if (0 == INPUT(n)->type)
 879                 return -EINVAL;
 880
 881         i->index = n;
 882         i->type = V4L2_INPUT_TYPE_CAMERA;
 883
 884         strcpy(i->name, iname[INPUT(n)->type]);
 885
 886         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 887                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 888                 i->type = V4L2_INPUT_TYPE_TUNER;
 889
 890         i->std = dev->vdev->tvnorms;
 891
 892         return 0;
 893 }
 894
 895 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 896 {
 897         struct em28xx_fh   *fh  = priv;
 898         struct em28xx      *dev = fh->dev;
 899
 900         *i = dev->ctl_input;
 901
 902         return 0;
 903 }
 904
 905 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 906 {
 907         struct em28xx_fh   *fh  = priv;
 908         struct em28xx      *dev = fh->dev;
 909         int                rc;
 910
 911         rc = check_dev(dev);
 912         if (rc < 0)
 913                 return rc;
 914
 915         if (i >= MAX_EM28XX_INPUT)
 916                 return -EINVAL;
 917         if (0 == INPUT(i)->type)
 918                 return -EINVAL;
 919
 920         mutex_lock(&dev->lock);
 921
 922         video_mux(dev, i);
 923
 924         mutex_unlock(&dev->lock);
 925         return 0;
 926 }
 927
 928 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 929 {
 930         struct em28xx_fh   *fh    = priv;
 931         struct em28xx      *dev   = fh->dev;
 932
 933         switch (a->index) {
 934         case EM28XX_AMUX_VIDEO:
 935                 strcpy(a->name, "Television");
 936                 break;
 937         case EM28XX_AMUX_LINE_IN:
 938                 strcpy(a->name, "Line In");
 939                 break;
 940         case EM28XX_AMUX_VIDEO2:
 941                 strcpy(a->name, "Television alt");
 942                 break;
 943         case EM28XX_AMUX_PHONE:
 944                 strcpy(a->name, "Phone");
 945                 break;
 946         case EM28XX_AMUX_MIC:
 947                 strcpy(a->name, "Mic");
 948                 break;
 949         case EM28XX_AMUX_CD:
 950                 strcpy(a->name, "CD");
 951                 break;
 952         case EM28XX_AMUX_AUX:
 953                 strcpy(a->name, "Aux");
 954                 break;
 955         case EM28XX_AMUX_PCM_OUT:
 956                 strcpy(a->name, "PCM");
 957                 break;
 958         default:
 959                 return -EINVAL;
 960         }
 961
 962         a->index = dev->ctl_ainput;
 963         a->capability = V4L2_AUDCAP_STEREO;
 964
 965         return 0;
 966 }
 967
 968 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 969 {
 970         struct em28xx_fh   *fh  = priv;
 971         struct em28xx      *dev = fh->dev;
 972
 973         dev->ctl_ainput = INPUT(a->index)->amux;
 974         dev->ctl_aoutput = INPUT(a->index)->aout;
 975         return 0;
 976 }
 977
 978 static int vidioc_queryctrl(struct file *file, void *priv,
 979                                 struct v4l2_queryctrl *qc)
 980 {
 981         struct em28xx_fh      *fh  = priv;
 982         struct em28xx         *dev = fh->dev;
 983         int                   id  = qc->id;
 984         int                   i;
 985         int                   rc;
 986
 987         rc = check_dev(dev);
 988         if (rc < 0)
 989                 return rc;
 990
 991         memset(qc, 0, sizeof(*qc));
 992
 993         qc->id = id;
 994
 995         if (!dev->has_msp34xx) {
 996                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 997                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
 998                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
 999                                 return 0;
1000                         }
1001                 }
1002         }
1003         mutex_lock(&dev->lock);
1004         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1005         mutex_unlock(&dev->lock);
1006
1007         if (qc->type)
1008                 return 0;
1009         else
1010                 return -EINVAL;
1011 }
1012
1013 static int vidioc_g_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         int                   rc;
1019
1020         rc = check_dev(dev);
1021         if (rc < 0)
1022                 return rc;
1023         mutex_lock(&dev->lock);
1024
1025         if (!dev->has_msp34xx)
1026                 rc = em28xx_get_ctrl(dev, ctrl);
1027         else
1028                 rc = -EINVAL;
1029
1030         if (rc == -EINVAL) {
1031                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1032                 rc = 0;
1033         }
1034
1035         mutex_unlock(&dev->lock);
1036         return rc;
1037 }
1038
1039 static int vidioc_s_ctrl(struct file *file, void *priv,
1040                                 struct v4l2_control *ctrl)
1041 {
1042         struct em28xx_fh      *fh  = priv;
1043         struct em28xx         *dev = fh->dev;
1044         u8                    i;
1045         int                   rc;
1046
1047         rc = check_dev(dev);
1048         if (rc < 0)
1049                 return rc;
1050
1051         mutex_lock(&dev->lock);
1052
1053         if (dev->has_msp34xx)
1054                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1055         else {
1056                 rc = 1;
1057                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1058                         if (ctrl->id == em28xx_qctrl[i].id) {
1059                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1060                                     ctrl->value > em28xx_qctrl[i].maximum) {
1061                                         rc = -ERANGE;
1062                                         break;
1063                                 }
1064
1065                                 rc = em28xx_set_ctrl(dev, ctrl);
1066                                 break;
1067                         }
1068                 }
1069         }
1070
1071         /* Control not found - try to send it to the attached devices */
1072         if (rc == 1) {
1073                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1074                 rc = 0;
1075         }
1076
1077         mutex_unlock(&dev->lock);
1078         return rc;
1079 }
1080
1081 static int vidioc_g_tuner(struct file *file, void *priv,
1082                                 struct v4l2_tuner *t)
1083 {
1084         struct em28xx_fh      *fh  = priv;
1085         struct em28xx         *dev = fh->dev;
1086         int                   rc;
1087
1088         rc = check_dev(dev);
1089         if (rc < 0)
1090                 return rc;
1091
1092         if (0 != t->index)
1093                 return -EINVAL;
1094
1095         strcpy(t->name, "Tuner");
1096
1097         mutex_lock(&dev->lock);
1098
1099         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1100
1101         mutex_unlock(&dev->lock);
1102         return 0;
1103 }
1104
1105 static int vidioc_s_tuner(struct file *file, void *priv,
1106                                 struct v4l2_tuner *t)
1107 {
1108         struct em28xx_fh      *fh  = priv;
1109         struct em28xx         *dev = fh->dev;
1110         int                   rc;
1111
1112         rc = check_dev(dev);
1113         if (rc < 0)
1114                 return rc;
1115
1116         if (0 != t->index)
1117                 return -EINVAL;
1118
1119         mutex_lock(&dev->lock);
1120
1121         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1122
1123         mutex_unlock(&dev->lock);
1124         return 0;
1125 }
1126
1127 static int vidioc_g_frequency(struct file *file, void *priv,
1128                                 struct v4l2_frequency *f)
1129 {
1130         struct em28xx_fh      *fh  = priv;
1131         struct em28xx         *dev = fh->dev;
1132
1133         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1134         f->frequency = dev->ctl_freq;
1135
1136         return 0;
1137 }
1138
1139 static int vidioc_s_frequency(struct file *file, void *priv,
1140                                 struct v4l2_frequency *f)
1141 {
1142         struct em28xx_fh      *fh  = priv;
1143         struct em28xx         *dev = fh->dev;
1144         int                   rc;
1145
1146         rc = check_dev(dev);
1147         if (rc < 0)
1148                 return rc;
1149
1150         if (0 != f->tuner)
1151                 return -EINVAL;
1152
1153         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1154                 return -EINVAL;
1155         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1156                 return -EINVAL;
1157
1158         mutex_lock(&dev->lock);
1159
1160         dev->ctl_freq = f->frequency;
1161         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1162
1163         mutex_unlock(&dev->lock);
1164         return 0;
1165 }
1166
1167 #ifdef CONFIG_VIDEO_ADV_DEBUG
1168 static int em28xx_reg_len(int reg)
1169 {
1170         switch (reg) {
1171         case EM28XX_R40_AC97LSB:
1172         case EM28XX_R30_HSCALELOW:
1173         case EM28XX_R32_VSCALELOW:
1174                 return 2;
1175         default:
1176                 return 1;
1177         }
1178 }
1179
1180 static int vidioc_g_register(struct file *file, void *priv,
1181                              struct v4l2_register *reg)
1182 {
1183         struct em28xx_fh      *fh  = priv;
1184         struct em28xx         *dev = fh->dev;
1185         int ret;
1186
1187         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1188                 return -EINVAL;
1189
1190         if (em28xx_reg_len(reg->reg) == 1) {
1191                 ret = em28xx_read_reg(dev, reg->reg);
1192                 if (ret < 0)
1193                         return ret;
1194
1195                 reg->val = ret;
1196         } else {
1197                 __le64 val = 0;
1198                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1199                                                    reg->reg, (char *)&val, 2);
1200                 if (ret < 0)
1201                         return ret;
1202
1203                 reg->val = le64_to_cpu(val);
1204         }
1205
1206         return 0;
1207 }
1208
1209 static int vidioc_s_register(struct file *file, void *priv,
1210                              struct v4l2_register *reg)
1211 {
1212         struct em28xx_fh      *fh  = priv;
1213         struct em28xx         *dev = fh->dev;
1214         __le64 buf;
1215
1216         buf = cpu_to_le64(reg->val);
1217
1218         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1219                                  em28xx_reg_len(reg->reg));
1220 }
1221 #endif
1222
1223
1224 static int vidioc_cropcap(struct file *file, void *priv,
1225                                         struct v4l2_cropcap *cc)
1226 {
1227         struct em28xx_fh      *fh  = priv;
1228         struct em28xx         *dev = fh->dev;
1229
1230         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1231                 return -EINVAL;
1232
1233         cc->bounds.left = 0;
1234         cc->bounds.top = 0;
1235         cc->bounds.width = dev->width;
1236         cc->bounds.height = dev->height;
1237         cc->defrect = cc->bounds;
1238         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1239         cc->pixelaspect.denominator = 59;
1240
1241         return 0;
1242 }
1243
1244 static int vidioc_streamon(struct file *file, void *priv,
1245                                         enum v4l2_buf_type type)
1246 {
1247         struct em28xx_fh      *fh  = priv;
1248         struct em28xx         *dev = fh->dev;
1249         int                   rc;
1250
1251         rc = check_dev(dev);
1252         if (rc < 0)
1253                 return rc;
1254
1255
1256         if (unlikely(res_get(fh) < 0))
1257                 return -EBUSY;
1258
1259         return (videobuf_streamon(&fh->vb_vidq));
1260 }
1261
1262 static int vidioc_streamoff(struct file *file, void *priv,
1263                                         enum v4l2_buf_type type)
1264 {
1265         struct em28xx_fh      *fh  = priv;
1266         struct em28xx         *dev = fh->dev;
1267         int                   rc;
1268
1269         rc = check_dev(dev);
1270         if (rc < 0)
1271                 return rc;
1272
1273         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1274                 return -EINVAL;
1275         if (type != fh->type)
1276                 return -EINVAL;
1277
1278         videobuf_streamoff(&fh->vb_vidq);
1279         res_free(fh);
1280
1281         return 0;
1282 }
1283
1284 static int vidioc_querycap(struct file *file, void  *priv,
1285                                         struct v4l2_capability *cap)
1286 {
1287         struct em28xx_fh      *fh  = priv;
1288         struct em28xx         *dev = fh->dev;
1289
1290         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1291         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1292         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1293
1294         cap->version = EM28XX_VERSION_CODE;
1295
1296         cap->capabilities =
1297                         V4L2_CAP_SLICED_VBI_CAPTURE |
1298                         V4L2_CAP_VIDEO_CAPTURE |
1299                         V4L2_CAP_AUDIO |
1300                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1301
1302         if (dev->tuner_type != TUNER_ABSENT)
1303                 cap->capabilities |= V4L2_CAP_TUNER;
1304
1305         return 0;
1306 }
1307
1308 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1309                                         struct v4l2_fmtdesc *fmtd)
1310 {
1311         if (fmtd->index != 0)
1312                 return -EINVAL;
1313
1314         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1315         strcpy(fmtd->description, "Packed YUY2");
1316         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1317         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1318
1319         return 0;
1320 }
1321
1322 /* Sliced VBI ioctls */
1323 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1324                                         struct v4l2_format *f)
1325 {
1326         struct em28xx_fh      *fh  = priv;
1327         struct em28xx         *dev = fh->dev;
1328         int                   rc;
1329
1330         rc = check_dev(dev);
1331         if (rc < 0)
1332                 return rc;
1333
1334         mutex_lock(&dev->lock);
1335
1336         f->fmt.sliced.service_set = 0;
1337
1338         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1339
1340         if (f->fmt.sliced.service_set == 0)
1341                 rc = -EINVAL;
1342
1343         mutex_unlock(&dev->lock);
1344         return rc;
1345 }
1346
1347 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1348                         struct v4l2_format *f)
1349 {
1350         struct em28xx_fh      *fh  = priv;
1351         struct em28xx         *dev = fh->dev;
1352         int                   rc;
1353
1354         rc = check_dev(dev);
1355         if (rc < 0)
1356                 return rc;
1357
1358         mutex_lock(&dev->lock);
1359         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1360         mutex_unlock(&dev->lock);
1361
1362         if (f->fmt.sliced.service_set == 0)
1363                 return -EINVAL;
1364
1365         return 0;
1366 }
1367
1368
1369 static int vidioc_reqbufs(struct file *file, void *priv,
1370                           struct v4l2_requestbuffers *rb)
1371 {
1372         struct em28xx_fh      *fh  = priv;
1373         struct em28xx         *dev = fh->dev;
1374         int                   rc;
1375
1376         rc = check_dev(dev);
1377         if (rc < 0)
1378                 return rc;
1379
1380         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1381 }
1382
1383 static int vidioc_querybuf(struct file *file, void *priv,
1384                            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_querybuf(&fh->vb_vidq, b));
1395 }
1396
1397 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1398 {
1399         struct em28xx_fh      *fh  = priv;
1400         struct em28xx         *dev = fh->dev;
1401         int                   rc;
1402
1403         rc = check_dev(dev);
1404         if (rc < 0)
1405                 return rc;
1406
1407         return (videobuf_qbuf(&fh->vb_vidq, b));
1408 }
1409
1410 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1411 {
1412         struct em28xx_fh      *fh  = priv;
1413         struct em28xx         *dev = fh->dev;
1414         int                   rc;
1415
1416         rc = check_dev(dev);
1417         if (rc < 0)
1418                 return rc;
1419
1420         return (videobuf_dqbuf(&fh->vb_vidq, b,
1421                                 file->f_flags & O_NONBLOCK));
1422 }
1423
1424 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1425 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1426 {
1427         struct em28xx_fh  *fh = priv;
1428
1429         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1430 }
1431 #endif
1432
1433
1434 /* ----------------------------------------------------------- */
1435 /* RADIO ESPECIFIC IOCTLS                                      */
1436 /* ----------------------------------------------------------- */
1437
1438 static int radio_querycap(struct file *file, void  *priv,
1439                           struct v4l2_capability *cap)
1440 {
1441         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1442
1443         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1444         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1445         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1446
1447         cap->version = EM28XX_VERSION_CODE;
1448         cap->capabilities = V4L2_CAP_TUNER;
1449         return 0;
1450 }
1451
1452 static int radio_g_tuner(struct file *file, void *priv,
1453                          struct v4l2_tuner *t)
1454 {
1455         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1456
1457         if (unlikely(t->index > 0))
1458                 return -EINVAL;
1459
1460         strcpy(t->name, "Radio");
1461         t->type = V4L2_TUNER_RADIO;
1462
1463         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1464         return 0;
1465 }
1466
1467 static int radio_enum_input(struct file *file, void *priv,
1468                             struct v4l2_input *i)
1469 {
1470         if (i->index != 0)
1471                 return -EINVAL;
1472         strcpy(i->name, "Radio");
1473         i->type = V4L2_INPUT_TYPE_TUNER;
1474
1475         return 0;
1476 }
1477
1478 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1479 {
1480         if (unlikely(a->index))
1481                 return -EINVAL;
1482
1483         strcpy(a->name, "Radio");
1484         return 0;
1485 }
1486
1487 static int radio_s_tuner(struct file *file, void *priv,
1488                          struct v4l2_tuner *t)
1489 {
1490         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1491
1492         if (0 != t->index)
1493                 return -EINVAL;
1494
1495         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1496
1497         return 0;
1498 }
1499
1500 static int radio_s_audio(struct file *file, void *fh,
1501                          struct v4l2_audio *a)
1502 {
1503         return 0;
1504 }
1505
1506 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1507 {
1508         return 0;
1509 }
1510
1511 static int radio_queryctrl(struct file *file, void *priv,
1512                            struct v4l2_queryctrl *qc)
1513 {
1514         int i;
1515
1516         if (qc->id <  V4L2_CID_BASE ||
1517                 qc->id >= V4L2_CID_LASTP1)
1518                 return -EINVAL;
1519
1520         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1521                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1522                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1523                         return 0;
1524                 }
1525         }
1526
1527         return -EINVAL;
1528 }
1529
1530 /*
1531  * em28xx_v4l2_open()
1532  * inits the device and starts isoc transfer
1533  */
1534 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1535 {
1536         int minor = iminor(inode);
1537         int errCode = 0, radio = 0;
1538         struct em28xx *h, *dev = NULL;
1539         struct em28xx_fh *fh;
1540         enum v4l2_buf_type fh_type = 0;
1541
1542         mutex_lock(&em28xx_devlist_mutex);
1543         list_for_each_entry(h, &em28xx_devlist, devlist) {
1544                 if (h->vdev->minor == minor) {
1545                         dev  = h;
1546                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1547                 }
1548                 if (h->vbi_dev->minor == minor) {
1549                         dev  = h;
1550                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1551                 }
1552                 if (h->radio_dev &&
1553                     h->radio_dev->minor == minor) {
1554                         radio = 1;
1555                         dev   = h;
1556                 }
1557         }
1558         mutex_unlock(&em28xx_devlist_mutex);
1559         if (NULL == dev)
1560                 return -ENODEV;
1561
1562         mutex_lock(&dev->lock);
1563
1564         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1565                                 minor, v4l2_type_names[fh_type], dev->users);
1566
1567
1568         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1569         if (!fh) {
1570                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1571                 mutex_unlock(&dev->lock);
1572                 return -ENOMEM;
1573         }
1574         fh->dev = dev;
1575         fh->radio = radio;
1576         fh->type = fh_type;
1577         filp->private_data = fh;
1578
1579         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1580                 dev->width = norm_maxw(dev);
1581                 dev->height = norm_maxh(dev);
1582                 dev->hscale = 0;
1583                 dev->vscale = 0;
1584
1585                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1586                 em28xx_set_alternate(dev);
1587                 em28xx_resolution_set(dev);
1588
1589                 /* Needed, since GPIO might have disabled power of
1590                    some i2c device
1591                  */
1592                 em28xx_config_i2c(dev);
1593
1594         }
1595         if (fh->radio) {
1596                 em28xx_videodbg("video_open: setting radio device\n");
1597                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1598         }
1599
1600         dev->users++;
1601
1602         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1603                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1604                         sizeof(struct em28xx_buffer), fh);
1605
1606         mutex_unlock(&dev->lock);
1607
1608         return errCode;
1609 }
1610
1611 /*
1612  * em28xx_realease_resources()
1613  * unregisters the v4l2,i2c and usb devices
1614  * called when the device gets disconected or at module unload
1615 */
1616 static void em28xx_release_resources(struct em28xx *dev)
1617 {
1618
1619         /*FIXME: I2C IR should be disconnected */
1620
1621         list_del(&dev->devlist);
1622         if (dev->sbutton_input_dev)
1623                 em28xx_deregister_snapshot_button(dev);
1624
1625         if (dev->ir)
1626                 em28xx_ir_fini(dev);
1627
1628         if (dev->radio_dev) {
1629                 if (-1 != dev->radio_dev->minor)
1630                         video_unregister_device(dev->radio_dev);
1631                 else
1632                         video_device_release(dev->radio_dev);
1633                 dev->radio_dev = NULL;
1634         }
1635         if (dev->vbi_dev) {
1636                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1637                             dev->vbi_dev->num);
1638                 if (-1 != dev->vbi_dev->minor)
1639                         video_unregister_device(dev->vbi_dev);
1640                 else
1641                         video_device_release(dev->vbi_dev);
1642                 dev->vbi_dev = NULL;
1643         }
1644         if (dev->vdev) {
1645                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1646                             dev->vdev->num);
1647                 if (-1 != dev->vdev->minor)
1648                         video_unregister_device(dev->vdev);
1649                 else
1650                         video_device_release(dev->vdev);
1651                 dev->vdev = NULL;
1652         }
1653         em28xx_i2c_unregister(dev);
1654         usb_put_dev(dev->udev);
1655
1656         /* Mark device as unused */
1657         em28xx_devused &= ~(1<<dev->devno);
1658 }
1659
1660 /*
1661  * em28xx_v4l2_close()
1662  * stops streaming and deallocates all resources allocated by the v4l2
1663  * calls and ioctls
1664  */
1665 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1666 {
1667         struct em28xx_fh *fh  = filp->private_data;
1668         struct em28xx    *dev = fh->dev;
1669         int              errCode;
1670
1671         em28xx_videodbg("users=%d\n", dev->users);
1672
1673
1674         if (res_check(fh))
1675                 res_free(fh);
1676
1677         mutex_lock(&dev->lock);
1678
1679         if (dev->users == 1) {
1680                 videobuf_stop(&fh->vb_vidq);
1681                 videobuf_mmap_free(&fh->vb_vidq);
1682
1683                 /* the device is already disconnect,
1684                    free the remaining resources */
1685                 if (dev->state & DEV_DISCONNECTED) {
1686                         em28xx_release_resources(dev);
1687                         mutex_unlock(&dev->lock);
1688                         kfree(dev);
1689                         return 0;
1690                 }
1691
1692                 /* do this before setting alternate! */
1693                 em28xx_uninit_isoc(dev);
1694                 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1695
1696                 /* set alternate 0 */
1697                 dev->alt = 0;
1698                 em28xx_videodbg("setting alternate 0\n");
1699                 errCode = usb_set_interface(dev->udev, 0, 0);
1700                 if (errCode < 0) {
1701                         em28xx_errdev("cannot change alternate number to "
1702                                         "0 (error=%i)\n", errCode);
1703                 }
1704         }
1705         kfree(fh);
1706         dev->users--;
1707         wake_up_interruptible_nr(&dev->open, 1);
1708         mutex_unlock(&dev->lock);
1709         return 0;
1710 }
1711
1712 /*
1713  * em28xx_v4l2_read()
1714  * will allocate buffers when called for the first time
1715  */
1716 static ssize_t
1717 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1718                  loff_t *pos)
1719 {
1720         struct em28xx_fh *fh = filp->private_data;
1721         struct em28xx *dev = fh->dev;
1722         int rc;
1723
1724         rc = check_dev(dev);
1725         if (rc < 0)
1726                 return rc;
1727
1728         /* FIXME: read() is not prepared to allow changing the video
1729            resolution while streaming. Seems a bug at em28xx_set_fmt
1730          */
1731
1732         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1733                 if (unlikely(res_get(fh)))
1734                         return -EBUSY;
1735
1736                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1737                                         filp->f_flags & O_NONBLOCK);
1738         }
1739         return 0;
1740 }
1741
1742 /*
1743  * em28xx_v4l2_poll()
1744  * will allocate buffers when called for the first time
1745  */
1746 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1747 {
1748         struct em28xx_fh *fh = filp->private_data;
1749         struct em28xx *dev = fh->dev;
1750         int rc;
1751
1752         rc = check_dev(dev);
1753         if (rc < 0)
1754                 return rc;
1755
1756         if (unlikely(res_get(fh) < 0))
1757                 return POLLERR;
1758
1759         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1760                 return POLLERR;
1761
1762         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1763 }
1764
1765 /*
1766  * em28xx_v4l2_mmap()
1767  */
1768 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1769 {
1770         struct em28xx_fh *fh    = filp->private_data;
1771         struct em28xx    *dev   = fh->dev;
1772         int              rc;
1773
1774         if (unlikely(res_get(fh) < 0))
1775                 return -EBUSY;
1776
1777         rc = check_dev(dev);
1778         if (rc < 0)
1779                 return rc;
1780
1781         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1782
1783         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1784                 (unsigned long)vma->vm_start,
1785                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1786                 rc);
1787
1788         return rc;
1789 }
1790
1791 static const struct file_operations em28xx_v4l_fops = {
1792         .owner         = THIS_MODULE,
1793         .open          = em28xx_v4l2_open,
1794         .release       = em28xx_v4l2_close,
1795         .read          = em28xx_v4l2_read,
1796         .poll          = em28xx_v4l2_poll,
1797         .mmap          = em28xx_v4l2_mmap,
1798         .ioctl         = video_ioctl2,
1799         .llseek        = no_llseek,
1800         .compat_ioctl  = v4l_compat_ioctl32,
1801 };
1802
1803 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1804         .vidioc_querycap            = vidioc_querycap,
1805         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1806         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1807         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1808         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1809         .vidioc_g_audio             = vidioc_g_audio,
1810         .vidioc_s_audio             = vidioc_s_audio,
1811         .vidioc_cropcap             = vidioc_cropcap,
1812
1813         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1814         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1815         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1816
1817         .vidioc_reqbufs             = vidioc_reqbufs,
1818         .vidioc_querybuf            = vidioc_querybuf,
1819         .vidioc_qbuf                = vidioc_qbuf,
1820         .vidioc_dqbuf               = vidioc_dqbuf,
1821         .vidioc_s_std               = vidioc_s_std,
1822         .vidioc_enum_input          = vidioc_enum_input,
1823         .vidioc_g_input             = vidioc_g_input,
1824         .vidioc_s_input             = vidioc_s_input,
1825         .vidioc_queryctrl           = vidioc_queryctrl,
1826         .vidioc_g_ctrl              = vidioc_g_ctrl,
1827         .vidioc_s_ctrl              = vidioc_s_ctrl,
1828         .vidioc_streamon            = vidioc_streamon,
1829         .vidioc_streamoff           = vidioc_streamoff,
1830         .vidioc_g_tuner             = vidioc_g_tuner,
1831         .vidioc_s_tuner             = vidioc_s_tuner,
1832         .vidioc_g_frequency         = vidioc_g_frequency,
1833         .vidioc_s_frequency         = vidioc_s_frequency,
1834 #ifdef CONFIG_VIDEO_ADV_DEBUG
1835         .vidioc_g_register          = vidioc_g_register,
1836         .vidioc_s_register          = vidioc_s_register,
1837 #endif
1838 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1839         .vidiocgmbuf                = vidiocgmbuf,
1840 #endif
1841 };
1842
1843 static const struct video_device em28xx_video_template = {
1844         .fops                       = &em28xx_v4l_fops,
1845         .release                    = video_device_release,
1846         .ioctl_ops                  = &video_ioctl_ops,
1847
1848         .minor                      = -1,
1849
1850         .tvnorms                    = V4L2_STD_ALL,
1851         .current_norm               = V4L2_STD_PAL,
1852 };
1853
1854 static const struct file_operations radio_fops = {
1855         .owner         = THIS_MODULE,
1856         .open          = em28xx_v4l2_open,
1857         .release       = em28xx_v4l2_close,
1858         .ioctl         = video_ioctl2,
1859         .compat_ioctl  = v4l_compat_ioctl32,
1860         .llseek        = no_llseek,
1861 };
1862
1863 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1864         .vidioc_querycap      = radio_querycap,
1865         .vidioc_g_tuner       = radio_g_tuner,
1866         .vidioc_enum_input    = radio_enum_input,
1867         .vidioc_g_audio       = radio_g_audio,
1868         .vidioc_s_tuner       = radio_s_tuner,
1869         .vidioc_s_audio       = radio_s_audio,
1870         .vidioc_s_input       = radio_s_input,
1871         .vidioc_queryctrl     = radio_queryctrl,
1872         .vidioc_g_ctrl        = vidioc_g_ctrl,
1873         .vidioc_s_ctrl        = vidioc_s_ctrl,
1874         .vidioc_g_frequency   = vidioc_g_frequency,
1875         .vidioc_s_frequency   = vidioc_s_frequency,
1876 #ifdef CONFIG_VIDEO_ADV_DEBUG
1877         .vidioc_g_register    = vidioc_g_register,
1878         .vidioc_s_register    = vidioc_s_register,
1879 #endif
1880 };
1881
1882 static struct video_device em28xx_radio_template = {
1883         .name                 = "em28xx-radio",
1884         .fops                 = &radio_fops,
1885         .ioctl_ops            = &radio_ioctl_ops,
1886         .minor                = -1,
1887 };
1888
1889 /******************************** usb interface ******************************/
1890
1891
1892 static LIST_HEAD(em28xx_extension_devlist);
1893 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1894
1895 int em28xx_register_extension(struct em28xx_ops *ops)
1896 {
1897         struct em28xx *dev = NULL;
1898
1899         mutex_lock(&em28xx_devlist_mutex);
1900         mutex_lock(&em28xx_extension_devlist_lock);
1901         list_add_tail(&ops->next, &em28xx_extension_devlist);
1902         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1903                 if (dev)
1904                         ops->init(dev);
1905         }
1906         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1907         mutex_unlock(&em28xx_extension_devlist_lock);
1908         mutex_unlock(&em28xx_devlist_mutex);
1909         return 0;
1910 }
1911 EXPORT_SYMBOL(em28xx_register_extension);
1912
1913 void em28xx_unregister_extension(struct em28xx_ops *ops)
1914 {
1915         struct em28xx *dev = NULL;
1916
1917         mutex_lock(&em28xx_devlist_mutex);
1918         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1919                 if (dev)
1920                         ops->fini(dev);
1921         }
1922
1923         mutex_lock(&em28xx_extension_devlist_lock);
1924         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1925         list_del(&ops->next);
1926         mutex_unlock(&em28xx_extension_devlist_lock);
1927         mutex_unlock(&em28xx_devlist_mutex);
1928 }
1929 EXPORT_SYMBOL(em28xx_unregister_extension);
1930
1931 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1932                                              const struct video_device *template,
1933                                              const char *type_name)
1934 {
1935         struct video_device *vfd;
1936
1937         vfd = video_device_alloc();
1938         if (NULL == vfd)
1939                 return NULL;
1940         *vfd = *template;
1941         vfd->minor   = -1;
1942         vfd->parent = &dev->udev->dev;
1943         vfd->release = video_device_release;
1944         vfd->debug = video_debug;
1945
1946         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1947                  dev->name, type_name);
1948
1949         return vfd;
1950 }
1951
1952 static int register_analog_devices(struct em28xx *dev)
1953 {
1954         int ret;
1955
1956         /* allocate and fill video video_device struct */
1957         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1958         if (!dev->vdev) {
1959                 em28xx_errdev("cannot allocate video_device.\n");
1960                 return -ENODEV;
1961         }
1962
1963         /* register v4l2 video video_device */
1964         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1965                                        video_nr[dev->devno]);
1966         if (ret) {
1967                 em28xx_errdev("unable to register video device (error=%i).\n",
1968                               ret);
1969                 return ret;
1970         }
1971
1972         /* Allocate and fill vbi video_device struct */
1973         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1974
1975         /* register v4l2 vbi video_device */
1976         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1977                                         vbi_nr[dev->devno]);
1978         if (ret < 0) {
1979                 em28xx_errdev("unable to register vbi device\n");
1980                 return ret;
1981         }
1982
1983         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1984                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
1985                 if (!dev->radio_dev) {
1986                         em28xx_errdev("cannot allocate video_device.\n");
1987                         return -ENODEV;
1988                 }
1989                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1990                                             radio_nr[dev->devno]);
1991                 if (ret < 0) {
1992                         em28xx_errdev("can't register radio device\n");
1993                         return ret;
1994                 }
1995                 em28xx_info("Registered radio device as /dev/radio%d\n",
1996                             dev->radio_dev->num);
1997         }
1998
1999         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2000                                 dev->vdev->num, dev->vbi_dev->num);
2001
2002         return 0;
2003 }
2004
2005
2006 /*
2007  * em28xx_init_dev()
2008  * allocates and inits the device structs, registers i2c bus and v4l device
2009  */
2010 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2011                            int minor)
2012 {
2013         struct em28xx_ops *ops = NULL;
2014         struct em28xx *dev = *devhandle;
2015         int retval = -ENOMEM;
2016         int errCode;
2017         unsigned int maxh, maxw;
2018
2019         dev->udev = udev;
2020         mutex_init(&dev->lock);
2021         mutex_init(&dev->ctrl_urb_lock);
2022         spin_lock_init(&dev->slock);
2023         init_waitqueue_head(&dev->open);
2024         init_waitqueue_head(&dev->wait_frame);
2025         init_waitqueue_head(&dev->wait_stream);
2026
2027         dev->em28xx_write_regs = em28xx_write_regs;
2028         dev->em28xx_read_reg = em28xx_read_reg;
2029         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2030         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2031         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2032         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2033
2034         em28xx_pre_card_setup(dev);
2035
2036         errCode = em28xx_config(dev);
2037         if (errCode) {
2038                 em28xx_errdev("error configuring device\n");
2039                 return -ENOMEM;
2040         }
2041
2042         /* register i2c bus */
2043         errCode = em28xx_i2c_register(dev);
2044         if (errCode < 0) {
2045                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2046                         __func__, errCode);
2047                 return errCode;
2048         }
2049
2050         /* Do board specific init and eeprom reading */
2051         em28xx_card_setup(dev);
2052
2053         /* Configure audio */
2054         errCode = em28xx_audio_setup(dev);
2055         if (errCode < 0) {
2056                 em28xx_errdev("%s: Error while setting audio - errCode [%d]!\n",
2057                         __func__, errCode);
2058         }
2059
2060         /* configure the device */
2061         em28xx_config_i2c(dev);
2062
2063         /* set default norm */
2064         dev->norm = em28xx_video_template.current_norm;
2065
2066         maxw = norm_maxw(dev);
2067         maxh = norm_maxh(dev);
2068
2069         /* set default image size */
2070         dev->width = maxw;
2071         dev->height = maxh;
2072         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2073         dev->hscale = 0;
2074         dev->vscale = 0;
2075         dev->ctl_input = 2;
2076
2077         errCode = em28xx_config(dev);
2078         if (errCode < 0) {
2079                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2080                         __func__, errCode);
2081                 return errCode;
2082         }
2083
2084         /* init video dma queues */
2085         INIT_LIST_HEAD(&dev->vidq.active);
2086         INIT_LIST_HEAD(&dev->vidq.queued);
2087
2088
2089         if (dev->has_msp34xx) {
2090                 /* Send a reset to other chips via gpio */
2091                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2092                 if (errCode < 0) {
2093                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2094                                 __func__, errCode);
2095                         return errCode;
2096                 }
2097                 msleep(3);
2098
2099                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2100                 if (errCode < 0) {
2101                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2102                                 __func__, errCode);
2103                         return errCode;
2104                 }
2105                 msleep(3);
2106         }
2107
2108         video_mux(dev, 0);
2109
2110         mutex_lock(&em28xx_devlist_mutex);
2111         list_add_tail(&dev->devlist, &em28xx_devlist);
2112         retval = register_analog_devices(dev);
2113         if (retval < 0) {
2114                 em28xx_release_resources(dev);
2115                 mutex_unlock(&em28xx_devlist_mutex);
2116                 goto fail_reg_devices;
2117         }
2118
2119         mutex_lock(&em28xx_extension_devlist_lock);
2120         if (!list_empty(&em28xx_extension_devlist)) {
2121                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2122                         if (ops->id)
2123                                 ops->init(dev);
2124                 }
2125         }
2126         mutex_unlock(&em28xx_extension_devlist_lock);
2127         mutex_unlock(&em28xx_devlist_mutex);
2128
2129         return 0;
2130
2131 fail_reg_devices:
2132         mutex_unlock(&dev->lock);
2133         return retval;
2134 }
2135
2136 #if defined(CONFIG_MODULES) && defined(MODULE)
2137 static void request_module_async(struct work_struct *work)
2138 {
2139         struct em28xx *dev = container_of(work,
2140                              struct em28xx, request_module_wk);
2141
2142         if (dev->has_audio_class)
2143                 request_module("snd-usb-audio");
2144         else if (dev->has_alsa_audio)
2145                 request_module("em28xx-alsa");
2146
2147         if (dev->has_dvb)
2148                 request_module("em28xx-dvb");
2149 }
2150
2151 static void request_modules(struct em28xx *dev)
2152 {
2153         INIT_WORK(&dev->request_module_wk, request_module_async);
2154         schedule_work(&dev->request_module_wk);
2155 }
2156 #else
2157 #define request_modules(dev)
2158 #endif /* CONFIG_MODULES */
2159
2160 /*
2161  * em28xx_usb_probe()
2162  * checks for supported devices
2163  */
2164 static int em28xx_usb_probe(struct usb_interface *interface,
2165                             const struct usb_device_id *id)
2166 {
2167         const struct usb_endpoint_descriptor *endpoint;
2168         struct usb_device *udev;
2169         struct usb_interface *uif;
2170         struct em28xx *dev = NULL;
2171         int retval = -ENODEV;
2172         int i, nr, ifnum, isoc_pipe;
2173
2174         udev = usb_get_dev(interface_to_usbdev(interface));
2175         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2176
2177         /* Check to see next free device and mark as used */
2178         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2179         em28xx_devused |= 1<<nr;
2180
2181         /* Don't register audio interfaces */
2182         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2183                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2184                                 udev->descriptor.idVendor,
2185                                 udev->descriptor.idProduct,
2186                                 ifnum,
2187                                 interface->altsetting[0].desc.bInterfaceClass);
2188
2189                 em28xx_devused &= ~(1<<nr);
2190                 return -ENODEV;
2191         }
2192
2193         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2194                         udev->descriptor.idVendor,
2195                         udev->descriptor.idProduct,
2196                         ifnum,
2197                         interface->altsetting[0].desc.bInterfaceClass);
2198
2199         endpoint = &interface->cur_altsetting->endpoint[0].desc;
2200
2201         /* check if the device has the iso in endpoint at the correct place */
2202         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
2203             USB_ENDPOINT_XFER_ISOC &&
2204             (interface->altsetting[1].endpoint[0].desc.wMaxPacketSize == 940))
2205         {
2206                 /* It's a newer em2874/em2875 device */
2207                 isoc_pipe = 0;
2208         } else {
2209                 isoc_pipe = 1;
2210                 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2211                 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2212                     USB_ENDPOINT_XFER_ISOC) {
2213                         em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2214                         em28xx_devused &= ~(1<<nr);
2215                         return -ENODEV;
2216                 }
2217                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2218                         em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2219                         em28xx_devused &= ~(1<<nr);
2220                         return -ENODEV;
2221                 }
2222         }
2223
2224         if (nr >= EM28XX_MAXBOARDS) {
2225                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2226                                 EM28XX_MAXBOARDS);
2227                 em28xx_devused &= ~(1<<nr);
2228                 return -ENOMEM;
2229         }
2230
2231         /* allocate memory for our device state and initialize it */
2232         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2233         if (dev == NULL) {
2234                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2235                 em28xx_devused &= ~(1<<nr);
2236                 return -ENOMEM;
2237         }
2238
2239         snprintf(dev->name, 29, "em28xx #%d", nr);
2240         dev->devno = nr;
2241         dev->model = id->driver_info;
2242         dev->alt   = -1;
2243
2244         /* Checks if audio is provided by some interface */
2245         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2246                 uif = udev->config->interface[i];
2247                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2248                         dev->has_audio_class = 1;
2249                         break;
2250                 }
2251         }
2252
2253         /* compute alternate max packet sizes */
2254         uif = udev->actconfig->interface[0];
2255
2256         dev->num_alt = uif->num_altsetting;
2257         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2258 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2259         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2260
2261         if (dev->alt_max_pkt_size == NULL) {
2262                 em28xx_errdev("out of memory!\n");
2263                 em28xx_devused &= ~(1<<nr);
2264                 kfree(dev);
2265                 return -ENOMEM;
2266         }
2267
2268         for (i = 0; i < dev->num_alt ; i++) {
2269                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
2270                                                         wMaxPacketSize);
2271                 dev->alt_max_pkt_size[i] =
2272                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2273                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2274                                                 dev->alt_max_pkt_size[i]);
2275         }
2276
2277         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2278                 dev->model = card[nr];
2279
2280         /* allocate device struct */
2281         retval = em28xx_init_dev(&dev, udev, nr);
2282         if (retval) {
2283                 em28xx_devused &= ~(1<<dev->devno);
2284                 kfree(dev);
2285
2286                 return retval;
2287         }
2288
2289         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2290
2291         /* save our data pointer in this interface device */
2292         usb_set_intfdata(interface, dev);
2293
2294         request_modules(dev);
2295
2296         return 0;
2297 }
2298
2299 /*
2300  * em28xx_usb_disconnect()
2301  * called when the device gets diconencted
2302  * video device will be unregistered on v4l2_close in case it is still open
2303  */
2304 static void em28xx_usb_disconnect(struct usb_interface *interface)
2305 {
2306         struct em28xx *dev;
2307         struct em28xx_ops *ops = NULL;
2308
2309         dev = usb_get_intfdata(interface);
2310         usb_set_intfdata(interface, NULL);
2311
2312         if (!dev)
2313                 return;
2314
2315         em28xx_info("disconnecting %s\n", dev->vdev->name);
2316
2317         /* wait until all current v4l2 io is finished then deallocate
2318            resources */
2319         mutex_lock(&dev->lock);
2320
2321         wake_up_interruptible_all(&dev->open);
2322
2323         if (dev->users) {
2324                 em28xx_warn
2325                     ("device /dev/video%d is open! Deregistration and memory "
2326                      "deallocation are deferred on close.\n",
2327                                 dev->vdev->num);
2328
2329                 dev->state |= DEV_MISCONFIGURED;
2330                 em28xx_uninit_isoc(dev);
2331                 dev->state |= DEV_DISCONNECTED;
2332                 wake_up_interruptible(&dev->wait_frame);
2333                 wake_up_interruptible(&dev->wait_stream);
2334         } else {
2335                 dev->state |= DEV_DISCONNECTED;
2336                 em28xx_release_resources(dev);
2337         }
2338         mutex_unlock(&dev->lock);
2339
2340         mutex_lock(&em28xx_extension_devlist_lock);
2341         if (!list_empty(&em28xx_extension_devlist)) {
2342                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2343                         ops->fini(dev);
2344                 }
2345         }
2346         mutex_unlock(&em28xx_extension_devlist_lock);
2347
2348         if (!dev->users) {
2349                 kfree(dev->alt_max_pkt_size);
2350                 kfree(dev);
2351         }
2352 }
2353
2354 static struct usb_driver em28xx_usb_driver = {
2355         .name = "em28xx",
2356         .probe = em28xx_usb_probe,
2357         .disconnect = em28xx_usb_disconnect,
2358         .id_table = em28xx_id_table,
2359 };
2360
2361 static int __init em28xx_module_init(void)
2362 {
2363         int result;
2364
2365         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2366                (EM28XX_VERSION_CODE >> 16) & 0xff,
2367                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2368 #ifdef SNAPSHOT
2369         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2370                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2371 #endif
2372
2373         /* register this driver with the USB subsystem */
2374         result = usb_register(&em28xx_usb_driver);
2375         if (result)
2376                 em28xx_err(DRIVER_NAME
2377                            " usb_register failed. Error number %d.\n", result);
2378
2379         return result;
2380 }
2381
2382 static void __exit em28xx_module_exit(void)
2383 {
2384         /* deregister this driver with the USB subsystem */
2385         usb_deregister(&em28xx_usb_driver);
2386 }
2387
2388 module_init(em28xx_module_init);
2389 module_exit(em28xx_module_exit);