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->board.is_em2800) {
 521                 retval = em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
 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_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
 532 /*      em28xx_write_reg(dev, EM28XX_R0F_XCLK, 0x80); clk register */
 533         em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x51);
 534
 535         dev->mute = 1;          /* maybe not the right place... */
 536         dev->volume = 0x1f;
 537
 538         em28xx_outfmt_set_yuv422(dev);
 539         em28xx_colorlevels_set_default(dev);
 540         em28xx_compression_disable(dev);
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * em28xx_config_i2c()
 547  * configure i2c attached devices
 548  */
 549 static void em28xx_config_i2c(struct em28xx *dev)
 550 {
 551         struct v4l2_routing route;
 552         int zero = 0;
 553
 554         route.input = INPUT(dev->ctl_input)->vmux;
 555         route.output = 0;
 556         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, &zero);
 557         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 558         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 559 }
 560
 561 static void video_mux(struct em28xx *dev, int index)
 562 {
 563         struct v4l2_routing route;
 564
 565         route.input = INPUT(index)->vmux;
 566         route.output = 0;
 567         dev->ctl_input = index;
 568         dev->ctl_ainput = INPUT(index)->amux;
 569         dev->ctl_aoutput = INPUT(index)->aout;
 570
 571         if (!dev->ctl_aoutput)
 572                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 573
 574         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 575
 576         if (dev->board.has_msp34xx) {
 577                 if (dev->i2s_speed) {
 578                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 579                                 &dev->i2s_speed);
 580                 }
 581                 route.input = dev->ctl_ainput;
 582                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 583                 /* Note: this is msp3400 specific */
 584                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 585                         &route);
 586         }
 587
 588         em28xx_audio_analog_set(dev);
 589 }
 590
 591 /* Usage lock check functions */
 592 static int res_get(struct em28xx_fh *fh)
 593 {
 594         struct em28xx    *dev = fh->dev;
 595         int              rc   = 0;
 596
 597         /* This instance already has stream_on */
 598         if (fh->stream_on)
 599                 return rc;
 600
 601         if (dev->stream_on)
 602                 return -EBUSY;
 603
 604         dev->stream_on = 1;
 605         fh->stream_on  = 1;
 606         return rc;
 607 }
 608
 609 static int res_check(struct em28xx_fh *fh)
 610 {
 611         return (fh->stream_on);
 612 }
 613
 614 static void res_free(struct em28xx_fh *fh)
 615 {
 616         struct em28xx    *dev = fh->dev;
 617
 618         fh->stream_on = 0;
 619         dev->stream_on = 0;
 620 }
 621
 622 /*
 623  * em28xx_get_ctrl()
 624  * return the current saturation, brightness or contrast, mute state
 625  */
 626 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 627 {
 628         switch (ctrl->id) {
 629         case V4L2_CID_AUDIO_MUTE:
 630                 ctrl->value = dev->mute;
 631                 return 0;
 632         case V4L2_CID_AUDIO_VOLUME:
 633                 ctrl->value = dev->volume;
 634                 return 0;
 635         default:
 636                 return -EINVAL;
 637         }
 638 }
 639
 640 /*
 641  * em28xx_set_ctrl()
 642  * mute or set new saturation, brightness or contrast
 643  */
 644 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 645 {
 646         switch (ctrl->id) {
 647         case V4L2_CID_AUDIO_MUTE:
 648                 if (ctrl->value != dev->mute) {
 649                         dev->mute = ctrl->value;
 650                         return em28xx_audio_analog_set(dev);
 651                 }
 652                 return 0;
 653         case V4L2_CID_AUDIO_VOLUME:
 654                 dev->volume = ctrl->value;
 655                 return em28xx_audio_analog_set(dev);
 656         default:
 657                 return -EINVAL;
 658         }
 659 }
 660
 661 static int check_dev(struct em28xx *dev)
 662 {
 663         if (dev->state & DEV_DISCONNECTED) {
 664                 em28xx_errdev("v4l2 ioctl: device not present\n");
 665                 return -ENODEV;
 666         }
 667
 668         if (dev->state & DEV_MISCONFIGURED) {
 669                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 670                               "close and open it again\n");
 671                 return -EIO;
 672         }
 673         return 0;
 674 }
 675
 676 static void get_scale(struct em28xx *dev,
 677                         unsigned int width, unsigned int height,
 678                         unsigned int *hscale, unsigned int *vscale)
 679 {
 680         unsigned int          maxw   = norm_maxw(dev);
 681         unsigned int          maxh   = norm_maxh(dev);
 682
 683         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 684         if (*hscale >= 0x4000)
 685                 *hscale = 0x3fff;
 686
 687         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 688         if (*vscale >= 0x4000)
 689                 *vscale = 0x3fff;
 690 }
 691
 692 /* ------------------------------------------------------------------
 693         IOCTL vidioc handling
 694    ------------------------------------------------------------------*/
 695
 696 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 697                                         struct v4l2_format *f)
 698 {
 699         struct em28xx_fh      *fh  = priv;
 700         struct em28xx         *dev = fh->dev;
 701
 702         mutex_lock(&dev->lock);
 703
 704         f->fmt.pix.width = dev->width;
 705         f->fmt.pix.height = dev->height;
 706         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 707         f->fmt.pix.bytesperline = dev->width * 2;
 708         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 709         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 710
 711         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 712         f->fmt.pix.field = dev->interlaced ?
 713                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 714
 715         mutex_unlock(&dev->lock);
 716         return 0;
 717 }
 718
 719 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 720                         struct v4l2_format *f)
 721 {
 722         struct em28xx_fh      *fh    = priv;
 723         struct em28xx         *dev   = fh->dev;
 724         int                   width  = f->fmt.pix.width;
 725         int                   height = f->fmt.pix.height;
 726         unsigned int          maxw   = norm_maxw(dev);
 727         unsigned int          maxh   = norm_maxh(dev);
 728         unsigned int          hscale, vscale;
 729
 730         /* width must even because of the YUYV format
 731            height must be even because of interlacing */
 732         height &= 0xfffe;
 733         width &= 0xfffe;
 734
 735         if (height < 32)
 736                 height = 32;
 737         if (height > maxh)
 738                 height = maxh;
 739         if (width < 48)
 740                 width = 48;
 741         if (width > maxw)
 742                 width = maxw;
 743
 744         mutex_lock(&dev->lock);
 745
 746         if (dev->board.is_em2800) {
 747                 /* the em2800 can only scale down to 50% */
 748                 if (height % (maxh / 2))
 749                         height = maxh;
 750                 if (width % (maxw / 2))
 751                         width = maxw;
 752                 /* according to empiatech support */
 753                 /* the MaxPacketSize is to small to support */
 754                 /* framesizes larger than 640x480 @ 30 fps */
 755                 /* or 640x576 @ 25 fps. As this would cut */
 756                 /* of a part of the image we prefer */
 757                 /* 360x576 or 360x480 for now */
 758                 if (width == maxw && height == maxh)
 759                         width /= 2;
 760         }
 761
 762         get_scale(dev, width, height, &hscale, &vscale);
 763
 764         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 765         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 766
 767         f->fmt.pix.width = width;
 768         f->fmt.pix.height = height;
 769         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 770         f->fmt.pix.bytesperline = width * 2;
 771         f->fmt.pix.sizeimage = width * 2 * height;
 772         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 773         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 774
 775         mutex_unlock(&dev->lock);
 776         return 0;
 777 }
 778
 779 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 780                         struct v4l2_format *f)
 781 {
 782         struct em28xx_fh      *fh  = priv;
 783         struct em28xx         *dev = fh->dev;
 784         int                   rc;
 785
 786         rc = check_dev(dev);
 787         if (rc < 0)
 788                 return rc;
 789
 790         vidioc_try_fmt_vid_cap(file, priv, f);
 791
 792         mutex_lock(&dev->lock);
 793
 794         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 795                 em28xx_errdev("%s queue busy\n", __func__);
 796                 rc = -EBUSY;
 797                 goto out;
 798         }
 799
 800         if (dev->stream_on && !fh->stream_on) {
 801                 em28xx_errdev("%s device in use by another fh\n", __func__);
 802                 rc = -EBUSY;
 803                 goto out;
 804         }
 805
 806         /* set new image size */
 807         dev->width = f->fmt.pix.width;
 808         dev->height = f->fmt.pix.height;
 809         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 810
 811         em28xx_set_alternate(dev);
 812         em28xx_resolution_set(dev);
 813
 814         rc = 0;
 815
 816 out:
 817         mutex_unlock(&dev->lock);
 818         return rc;
 819 }
 820
 821 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 822 {
 823         struct em28xx_fh   *fh  = priv;
 824         struct em28xx      *dev = fh->dev;
 825         struct v4l2_format f;
 826         int                rc;
 827
 828         rc = check_dev(dev);
 829         if (rc < 0)
 830                 return rc;
 831
 832         mutex_lock(&dev->lock);
 833         dev->norm = *norm;
 834         mutex_unlock(&dev->lock);
 835
 836         /* Adjusts width/height, if needed */
 837         f.fmt.pix.width = dev->width;
 838         f.fmt.pix.height = dev->height;
 839         vidioc_try_fmt_vid_cap(file, priv, &f);
 840
 841         mutex_lock(&dev->lock);
 842
 843         /* set new image size */
 844         dev->width = f.fmt.pix.width;
 845         dev->height = f.fmt.pix.height;
 846         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 847
 848         em28xx_resolution_set(dev);
 849         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 850
 851         mutex_unlock(&dev->lock);
 852         return 0;
 853 }
 854
 855 static const char *iname[] = {
 856         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 857         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 858         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 859         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 860         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 861         [EM28XX_VMUX_TELEVISION] = "Television",
 862         [EM28XX_VMUX_CABLE]      = "Cable TV",
 863         [EM28XX_VMUX_DVB]        = "DVB",
 864         [EM28XX_VMUX_DEBUG]      = "for debug only",
 865 };
 866
 867 static int vidioc_enum_input(struct file *file, void *priv,
 868                                 struct v4l2_input *i)
 869 {
 870         struct em28xx_fh   *fh  = priv;
 871         struct em28xx      *dev = fh->dev;
 872         unsigned int       n;
 873
 874         n = i->index;
 875         if (n >= MAX_EM28XX_INPUT)
 876                 return -EINVAL;
 877         if (0 == INPUT(n)->type)
 878                 return -EINVAL;
 879
 880         i->index = n;
 881         i->type = V4L2_INPUT_TYPE_CAMERA;
 882
 883         strcpy(i->name, iname[INPUT(n)->type]);
 884
 885         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 886                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 887                 i->type = V4L2_INPUT_TYPE_TUNER;
 888
 889         i->std = dev->vdev->tvnorms;
 890
 891         return 0;
 892 }
 893
 894 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 895 {
 896         struct em28xx_fh   *fh  = priv;
 897         struct em28xx      *dev = fh->dev;
 898
 899         *i = dev->ctl_input;
 900
 901         return 0;
 902 }
 903
 904 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 905 {
 906         struct em28xx_fh   *fh  = priv;
 907         struct em28xx      *dev = fh->dev;
 908         int                rc;
 909
 910         rc = check_dev(dev);
 911         if (rc < 0)
 912                 return rc;
 913
 914         if (i >= MAX_EM28XX_INPUT)
 915                 return -EINVAL;
 916         if (0 == INPUT(i)->type)
 917                 return -EINVAL;
 918
 919         mutex_lock(&dev->lock);
 920
 921         video_mux(dev, i);
 922
 923         mutex_unlock(&dev->lock);
 924         return 0;
 925 }
 926
 927 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 928 {
 929         struct em28xx_fh   *fh    = priv;
 930         struct em28xx      *dev   = fh->dev;
 931
 932         switch (a->index) {
 933         case EM28XX_AMUX_VIDEO:
 934                 strcpy(a->name, "Television");
 935                 break;
 936         case EM28XX_AMUX_LINE_IN:
 937                 strcpy(a->name, "Line In");
 938                 break;
 939         case EM28XX_AMUX_VIDEO2:
 940                 strcpy(a->name, "Television alt");
 941                 break;
 942         case EM28XX_AMUX_PHONE:
 943                 strcpy(a->name, "Phone");
 944                 break;
 945         case EM28XX_AMUX_MIC:
 946                 strcpy(a->name, "Mic");
 947                 break;
 948         case EM28XX_AMUX_CD:
 949                 strcpy(a->name, "CD");
 950                 break;
 951         case EM28XX_AMUX_AUX:
 952                 strcpy(a->name, "Aux");
 953                 break;
 954         case EM28XX_AMUX_PCM_OUT:
 955                 strcpy(a->name, "PCM");
 956                 break;
 957         default:
 958                 return -EINVAL;
 959         }
 960
 961         a->index = dev->ctl_ainput;
 962         a->capability = V4L2_AUDCAP_STEREO;
 963
 964         return 0;
 965 }
 966
 967 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 968 {
 969         struct em28xx_fh   *fh  = priv;
 970         struct em28xx      *dev = fh->dev;
 971
 972         dev->ctl_ainput = INPUT(a->index)->amux;
 973         dev->ctl_aoutput = INPUT(a->index)->aout;
 974
 975         if (!dev->ctl_aoutput)
 976                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
 977         return 0;
 978 }
 979
 980 static int vidioc_queryctrl(struct file *file, void *priv,
 981                                 struct v4l2_queryctrl *qc)
 982 {
 983         struct em28xx_fh      *fh  = priv;
 984         struct em28xx         *dev = fh->dev;
 985         int                   id  = qc->id;
 986         int                   i;
 987         int                   rc;
 988
 989         rc = check_dev(dev);
 990         if (rc < 0)
 991                 return rc;
 992
 993         memset(qc, 0, sizeof(*qc));
 994
 995         qc->id = id;
 996
 997         if (!dev->board.has_msp34xx) {
 998                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 999                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1000                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1001                                 return 0;
1002                         }
1003                 }
1004         }
1005         mutex_lock(&dev->lock);
1006         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1007         mutex_unlock(&dev->lock);
1008
1009         if (qc->type)
1010                 return 0;
1011         else
1012                 return -EINVAL;
1013 }
1014
1015 static int vidioc_g_ctrl(struct file *file, void *priv,
1016                                 struct v4l2_control *ctrl)
1017 {
1018         struct em28xx_fh      *fh  = priv;
1019         struct em28xx         *dev = fh->dev;
1020         int                   rc;
1021
1022         rc = check_dev(dev);
1023         if (rc < 0)
1024                 return rc;
1025         mutex_lock(&dev->lock);
1026
1027         if (!dev->board.has_msp34xx)
1028                 rc = em28xx_get_ctrl(dev, ctrl);
1029         else
1030                 rc = -EINVAL;
1031
1032         if (rc == -EINVAL) {
1033                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1034                 rc = 0;
1035         }
1036
1037         mutex_unlock(&dev->lock);
1038         return rc;
1039 }
1040
1041 static int vidioc_s_ctrl(struct file *file, void *priv,
1042                                 struct v4l2_control *ctrl)
1043 {
1044         struct em28xx_fh      *fh  = priv;
1045         struct em28xx         *dev = fh->dev;
1046         u8                    i;
1047         int                   rc;
1048
1049         rc = check_dev(dev);
1050         if (rc < 0)
1051                 return rc;
1052
1053         mutex_lock(&dev->lock);
1054
1055         if (dev->board.has_msp34xx)
1056                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1057         else {
1058                 rc = 1;
1059                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1060                         if (ctrl->id == em28xx_qctrl[i].id) {
1061                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1062                                     ctrl->value > em28xx_qctrl[i].maximum) {
1063                                         rc = -ERANGE;
1064                                         break;
1065                                 }
1066
1067                                 rc = em28xx_set_ctrl(dev, ctrl);
1068                                 break;
1069                         }
1070                 }
1071         }
1072
1073         /* Control not found - try to send it to the attached devices */
1074         if (rc == 1) {
1075                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1076                 rc = 0;
1077         }
1078
1079         mutex_unlock(&dev->lock);
1080         return rc;
1081 }
1082
1083 static int vidioc_g_tuner(struct file *file, void *priv,
1084                                 struct v4l2_tuner *t)
1085 {
1086         struct em28xx_fh      *fh  = priv;
1087         struct em28xx         *dev = fh->dev;
1088         int                   rc;
1089
1090         rc = check_dev(dev);
1091         if (rc < 0)
1092                 return rc;
1093
1094         if (0 != t->index)
1095                 return -EINVAL;
1096
1097         strcpy(t->name, "Tuner");
1098
1099         mutex_lock(&dev->lock);
1100
1101         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1102
1103         mutex_unlock(&dev->lock);
1104         return 0;
1105 }
1106
1107 static int vidioc_s_tuner(struct file *file, void *priv,
1108                                 struct v4l2_tuner *t)
1109 {
1110         struct em28xx_fh      *fh  = priv;
1111         struct em28xx         *dev = fh->dev;
1112         int                   rc;
1113
1114         rc = check_dev(dev);
1115         if (rc < 0)
1116                 return rc;
1117
1118         if (0 != t->index)
1119                 return -EINVAL;
1120
1121         mutex_lock(&dev->lock);
1122
1123         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1124
1125         mutex_unlock(&dev->lock);
1126         return 0;
1127 }
1128
1129 static int vidioc_g_frequency(struct file *file, void *priv,
1130                                 struct v4l2_frequency *f)
1131 {
1132         struct em28xx_fh      *fh  = priv;
1133         struct em28xx         *dev = fh->dev;
1134
1135         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1136         f->frequency = dev->ctl_freq;
1137
1138         return 0;
1139 }
1140
1141 static int vidioc_s_frequency(struct file *file, void *priv,
1142                                 struct v4l2_frequency *f)
1143 {
1144         struct em28xx_fh      *fh  = priv;
1145         struct em28xx         *dev = fh->dev;
1146         int                   rc;
1147
1148         rc = check_dev(dev);
1149         if (rc < 0)
1150                 return rc;
1151
1152         if (0 != f->tuner)
1153                 return -EINVAL;
1154
1155         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1156                 return -EINVAL;
1157         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1158                 return -EINVAL;
1159
1160         mutex_lock(&dev->lock);
1161
1162         dev->ctl_freq = f->frequency;
1163         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1164
1165         mutex_unlock(&dev->lock);
1166         return 0;
1167 }
1168
1169 #ifdef CONFIG_VIDEO_ADV_DEBUG
1170 static int em28xx_reg_len(int reg)
1171 {
1172         switch (reg) {
1173         case EM28XX_R40_AC97LSB:
1174         case EM28XX_R30_HSCALELOW:
1175         case EM28XX_R32_VSCALELOW:
1176                 return 2;
1177         default:
1178                 return 1;
1179         }
1180 }
1181
1182 static int vidioc_g_register(struct file *file, void *priv,
1183                              struct v4l2_register *reg)
1184 {
1185         struct em28xx_fh      *fh  = priv;
1186         struct em28xx         *dev = fh->dev;
1187         int ret;
1188
1189         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1190                 return -EINVAL;
1191
1192         if (em28xx_reg_len(reg->reg) == 1) {
1193                 ret = em28xx_read_reg(dev, reg->reg);
1194                 if (ret < 0)
1195                         return ret;
1196
1197                 reg->val = ret;
1198         } else {
1199                 __le64 val = 0;
1200                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1201                                                    reg->reg, (char *)&val, 2);
1202                 if (ret < 0)
1203                         return ret;
1204
1205                 reg->val = le64_to_cpu(val);
1206         }
1207
1208         return 0;
1209 }
1210
1211 static int vidioc_s_register(struct file *file, void *priv,
1212                              struct v4l2_register *reg)
1213 {
1214         struct em28xx_fh      *fh  = priv;
1215         struct em28xx         *dev = fh->dev;
1216         __le64 buf;
1217
1218         buf = cpu_to_le64(reg->val);
1219
1220         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1221                                  em28xx_reg_len(reg->reg));
1222 }
1223 #endif
1224
1225
1226 static int vidioc_cropcap(struct file *file, void *priv,
1227                                         struct v4l2_cropcap *cc)
1228 {
1229         struct em28xx_fh      *fh  = priv;
1230         struct em28xx         *dev = fh->dev;
1231
1232         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1233                 return -EINVAL;
1234
1235         cc->bounds.left = 0;
1236         cc->bounds.top = 0;
1237         cc->bounds.width = dev->width;
1238         cc->bounds.height = dev->height;
1239         cc->defrect = cc->bounds;
1240         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1241         cc->pixelaspect.denominator = 59;
1242
1243         return 0;
1244 }
1245
1246 static int vidioc_streamon(struct file *file, void *priv,
1247                                         enum v4l2_buf_type type)
1248 {
1249         struct em28xx_fh      *fh  = priv;
1250         struct em28xx         *dev = fh->dev;
1251         int                   rc;
1252
1253         rc = check_dev(dev);
1254         if (rc < 0)
1255                 return rc;
1256
1257
1258         mutex_lock(&dev->lock);
1259         rc = res_get(fh);
1260         mutex_unlock(&dev->lock);
1261
1262         if (unlikely(rc < 0))
1263                 return rc;
1264
1265         return (videobuf_streamon(&fh->vb_vidq));
1266 }
1267
1268 static int vidioc_streamoff(struct file *file, void *priv,
1269                                         enum v4l2_buf_type type)
1270 {
1271         struct em28xx_fh      *fh  = priv;
1272         struct em28xx         *dev = fh->dev;
1273         int                   rc;
1274
1275         rc = check_dev(dev);
1276         if (rc < 0)
1277                 return rc;
1278
1279         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1280                 return -EINVAL;
1281         if (type != fh->type)
1282                 return -EINVAL;
1283
1284         videobuf_streamoff(&fh->vb_vidq);
1285         mutex_lock(&dev->lock);
1286         res_free(fh);
1287         mutex_unlock(&dev->lock);
1288
1289         return 0;
1290 }
1291
1292 static int vidioc_querycap(struct file *file, void  *priv,
1293                                         struct v4l2_capability *cap)
1294 {
1295         struct em28xx_fh      *fh  = priv;
1296         struct em28xx         *dev = fh->dev;
1297
1298         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1299         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1300         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1301
1302         cap->version = EM28XX_VERSION_CODE;
1303
1304         cap->capabilities =
1305                         V4L2_CAP_SLICED_VBI_CAPTURE |
1306                         V4L2_CAP_VIDEO_CAPTURE |
1307                         V4L2_CAP_AUDIO |
1308                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1309
1310         if (dev->tuner_type != TUNER_ABSENT)
1311                 cap->capabilities |= V4L2_CAP_TUNER;
1312
1313         return 0;
1314 }
1315
1316 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1317                                         struct v4l2_fmtdesc *fmtd)
1318 {
1319         if (fmtd->index != 0)
1320                 return -EINVAL;
1321
1322         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1323         strcpy(fmtd->description, "Packed YUY2");
1324         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1325         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1326
1327         return 0;
1328 }
1329
1330 /* Sliced VBI ioctls */
1331 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1332                                         struct v4l2_format *f)
1333 {
1334         struct em28xx_fh      *fh  = priv;
1335         struct em28xx         *dev = fh->dev;
1336         int                   rc;
1337
1338         rc = check_dev(dev);
1339         if (rc < 0)
1340                 return rc;
1341
1342         mutex_lock(&dev->lock);
1343
1344         f->fmt.sliced.service_set = 0;
1345
1346         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1347
1348         if (f->fmt.sliced.service_set == 0)
1349                 rc = -EINVAL;
1350
1351         mutex_unlock(&dev->lock);
1352         return rc;
1353 }
1354
1355 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1356                         struct v4l2_format *f)
1357 {
1358         struct em28xx_fh      *fh  = priv;
1359         struct em28xx         *dev = fh->dev;
1360         int                   rc;
1361
1362         rc = check_dev(dev);
1363         if (rc < 0)
1364                 return rc;
1365
1366         mutex_lock(&dev->lock);
1367         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1368         mutex_unlock(&dev->lock);
1369
1370         if (f->fmt.sliced.service_set == 0)
1371                 return -EINVAL;
1372
1373         return 0;
1374 }
1375
1376
1377 static int vidioc_reqbufs(struct file *file, void *priv,
1378                           struct v4l2_requestbuffers *rb)
1379 {
1380         struct em28xx_fh      *fh  = priv;
1381         struct em28xx         *dev = fh->dev;
1382         int                   rc;
1383
1384         rc = check_dev(dev);
1385         if (rc < 0)
1386                 return rc;
1387
1388         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1389 }
1390
1391 static int vidioc_querybuf(struct file *file, void *priv,
1392                            struct v4l2_buffer *b)
1393 {
1394         struct em28xx_fh      *fh  = priv;
1395         struct em28xx         *dev = fh->dev;
1396         int                   rc;
1397
1398         rc = check_dev(dev);
1399         if (rc < 0)
1400                 return rc;
1401
1402         return (videobuf_querybuf(&fh->vb_vidq, b));
1403 }
1404
1405 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1406 {
1407         struct em28xx_fh      *fh  = priv;
1408         struct em28xx         *dev = fh->dev;
1409         int                   rc;
1410
1411         rc = check_dev(dev);
1412         if (rc < 0)
1413                 return rc;
1414
1415         return (videobuf_qbuf(&fh->vb_vidq, b));
1416 }
1417
1418 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1419 {
1420         struct em28xx_fh      *fh  = priv;
1421         struct em28xx         *dev = fh->dev;
1422         int                   rc;
1423
1424         rc = check_dev(dev);
1425         if (rc < 0)
1426                 return rc;
1427
1428         return (videobuf_dqbuf(&fh->vb_vidq, b,
1429                                 file->f_flags & O_NONBLOCK));
1430 }
1431
1432 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1433 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1434 {
1435         struct em28xx_fh  *fh = priv;
1436
1437         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1438 }
1439 #endif
1440
1441
1442 /* ----------------------------------------------------------- */
1443 /* RADIO ESPECIFIC IOCTLS                                      */
1444 /* ----------------------------------------------------------- */
1445
1446 static int radio_querycap(struct file *file, void  *priv,
1447                           struct v4l2_capability *cap)
1448 {
1449         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1450
1451         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1452         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1453         strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
1454
1455         cap->version = EM28XX_VERSION_CODE;
1456         cap->capabilities = V4L2_CAP_TUNER;
1457         return 0;
1458 }
1459
1460 static int radio_g_tuner(struct file *file, void *priv,
1461                          struct v4l2_tuner *t)
1462 {
1463         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1464
1465         if (unlikely(t->index > 0))
1466                 return -EINVAL;
1467
1468         strcpy(t->name, "Radio");
1469         t->type = V4L2_TUNER_RADIO;
1470
1471         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1472         return 0;
1473 }
1474
1475 static int radio_enum_input(struct file *file, void *priv,
1476                             struct v4l2_input *i)
1477 {
1478         if (i->index != 0)
1479                 return -EINVAL;
1480         strcpy(i->name, "Radio");
1481         i->type = V4L2_INPUT_TYPE_TUNER;
1482
1483         return 0;
1484 }
1485
1486 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1487 {
1488         if (unlikely(a->index))
1489                 return -EINVAL;
1490
1491         strcpy(a->name, "Radio");
1492         return 0;
1493 }
1494
1495 static int radio_s_tuner(struct file *file, void *priv,
1496                          struct v4l2_tuner *t)
1497 {
1498         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1499
1500         if (0 != t->index)
1501                 return -EINVAL;
1502
1503         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1504
1505         return 0;
1506 }
1507
1508 static int radio_s_audio(struct file *file, void *fh,
1509                          struct v4l2_audio *a)
1510 {
1511         return 0;
1512 }
1513
1514 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1515 {
1516         return 0;
1517 }
1518
1519 static int radio_queryctrl(struct file *file, void *priv,
1520                            struct v4l2_queryctrl *qc)
1521 {
1522         int i;
1523
1524         if (qc->id <  V4L2_CID_BASE ||
1525                 qc->id >= V4L2_CID_LASTP1)
1526                 return -EINVAL;
1527
1528         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1529                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1530                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1531                         return 0;
1532                 }
1533         }
1534
1535         return -EINVAL;
1536 }
1537
1538 /*
1539  * em28xx_v4l2_open()
1540  * inits the device and starts isoc transfer
1541  */
1542 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1543 {
1544         int minor = iminor(inode);
1545         int errCode = 0, radio = 0;
1546         struct em28xx *h, *dev = NULL;
1547         struct em28xx_fh *fh;
1548         enum v4l2_buf_type fh_type = 0;
1549
1550         mutex_lock(&em28xx_devlist_mutex);
1551         list_for_each_entry(h, &em28xx_devlist, devlist) {
1552                 if (h->vdev->minor == minor) {
1553                         dev  = h;
1554                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1555                 }
1556                 if (h->vbi_dev->minor == minor) {
1557                         dev  = h;
1558                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1559                 }
1560                 if (h->radio_dev &&
1561                     h->radio_dev->minor == minor) {
1562                         radio = 1;
1563                         dev   = h;
1564                 }
1565         }
1566         mutex_unlock(&em28xx_devlist_mutex);
1567         if (NULL == dev)
1568                 return -ENODEV;
1569
1570         mutex_lock(&dev->lock);
1571
1572         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1573                                 minor, v4l2_type_names[fh_type], dev->users);
1574
1575
1576         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1577         if (!fh) {
1578                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1579                 mutex_unlock(&dev->lock);
1580                 return -ENOMEM;
1581         }
1582         fh->dev = dev;
1583         fh->radio = radio;
1584         fh->type = fh_type;
1585         filp->private_data = fh;
1586
1587         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1588                 dev->width = norm_maxw(dev);
1589                 dev->height = norm_maxh(dev);
1590                 dev->hscale = 0;
1591                 dev->vscale = 0;
1592
1593                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1594                 em28xx_set_alternate(dev);
1595                 em28xx_resolution_set(dev);
1596
1597                 /* Needed, since GPIO might have disabled power of
1598                    some i2c device
1599                  */
1600                 em28xx_config_i2c(dev);
1601
1602         }
1603         if (fh->radio) {
1604                 em28xx_videodbg("video_open: setting radio device\n");
1605                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1606         }
1607
1608         dev->users++;
1609
1610         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1611                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1612                         sizeof(struct em28xx_buffer), fh);
1613
1614         mutex_unlock(&dev->lock);
1615
1616         return errCode;
1617 }
1618
1619 /*
1620  * em28xx_realease_resources()
1621  * unregisters the v4l2,i2c and usb devices
1622  * called when the device gets disconected or at module unload
1623 */
1624 static void em28xx_release_resources(struct em28xx *dev)
1625 {
1626
1627         /*FIXME: I2C IR should be disconnected */
1628
1629         list_del(&dev->devlist);
1630         if (dev->sbutton_input_dev)
1631                 em28xx_deregister_snapshot_button(dev);
1632
1633         if (dev->ir)
1634                 em28xx_ir_fini(dev);
1635
1636         if (dev->radio_dev) {
1637                 if (-1 != dev->radio_dev->minor)
1638                         video_unregister_device(dev->radio_dev);
1639                 else
1640                         video_device_release(dev->radio_dev);
1641                 dev->radio_dev = NULL;
1642         }
1643         if (dev->vbi_dev) {
1644                 em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
1645                             dev->vbi_dev->num);
1646                 if (-1 != dev->vbi_dev->minor)
1647                         video_unregister_device(dev->vbi_dev);
1648                 else
1649                         video_device_release(dev->vbi_dev);
1650                 dev->vbi_dev = NULL;
1651         }
1652         if (dev->vdev) {
1653                 em28xx_info("V4L2 device /dev/video%d deregistered\n",
1654                             dev->vdev->num);
1655                 if (-1 != dev->vdev->minor)
1656                         video_unregister_device(dev->vdev);
1657                 else
1658                         video_device_release(dev->vdev);
1659                 dev->vdev = NULL;
1660         }
1661         em28xx_i2c_unregister(dev);
1662         usb_put_dev(dev->udev);
1663
1664         /* Mark device as unused */
1665         em28xx_devused &= ~(1<<dev->devno);
1666 }
1667
1668 /*
1669  * em28xx_v4l2_close()
1670  * stops streaming and deallocates all resources allocated by the v4l2
1671  * calls and ioctls
1672  */
1673 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1674 {
1675         struct em28xx_fh *fh  = filp->private_data;
1676         struct em28xx    *dev = fh->dev;
1677         int              errCode;
1678
1679         em28xx_videodbg("users=%d\n", dev->users);
1680
1681
1682         mutex_lock(&dev->lock);
1683         if (res_check(fh))
1684                 res_free(fh);
1685
1686         if (dev->users == 1) {
1687                 videobuf_stop(&fh->vb_vidq);
1688                 videobuf_mmap_free(&fh->vb_vidq);
1689
1690                 /* the device is already disconnect,
1691                    free the remaining resources */
1692                 if (dev->state & DEV_DISCONNECTED) {
1693                         em28xx_release_resources(dev);
1694                         mutex_unlock(&dev->lock);
1695                         kfree(dev);
1696                         return 0;
1697                 }
1698
1699                 /* Save some power by putting tuner to sleep */
1700                 em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL);
1701
1702                 /* do this before setting alternate! */
1703                 em28xx_uninit_isoc(dev);
1704                 em28xx_set_mode(dev, EM28XX_SUSPEND);
1705
1706                 /* set alternate 0 */
1707                 dev->alt = 0;
1708                 em28xx_videodbg("setting alternate 0\n");
1709                 errCode = usb_set_interface(dev->udev, 0, 0);
1710                 if (errCode < 0) {
1711                         em28xx_errdev("cannot change alternate number to "
1712                                         "0 (error=%i)\n", errCode);
1713                 }
1714         }
1715         kfree(fh);
1716         dev->users--;
1717         wake_up_interruptible_nr(&dev->open, 1);
1718         mutex_unlock(&dev->lock);
1719         return 0;
1720 }
1721
1722 /*
1723  * em28xx_v4l2_read()
1724  * will allocate buffers when called for the first time
1725  */
1726 static ssize_t
1727 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1728                  loff_t *pos)
1729 {
1730         struct em28xx_fh *fh = filp->private_data;
1731         struct em28xx *dev = fh->dev;
1732         int rc;
1733
1734         rc = check_dev(dev);
1735         if (rc < 0)
1736                 return rc;
1737
1738         /* FIXME: read() is not prepared to allow changing the video
1739            resolution while streaming. Seems a bug at em28xx_set_fmt
1740          */
1741
1742         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1743                 mutex_lock(&dev->lock);
1744                 rc = res_get(fh);
1745                 mutex_unlock(&dev->lock);
1746
1747                 if (unlikely(rc < 0))
1748                         return rc;
1749
1750                 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1751                                         filp->f_flags & O_NONBLOCK);
1752         }
1753         return 0;
1754 }
1755
1756 /*
1757  * em28xx_v4l2_poll()
1758  * will allocate buffers when called for the first time
1759  */
1760 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1761 {
1762         struct em28xx_fh *fh = filp->private_data;
1763         struct em28xx *dev = fh->dev;
1764         int rc;
1765
1766         rc = check_dev(dev);
1767         if (rc < 0)
1768                 return rc;
1769
1770         mutex_lock(&dev->lock);
1771         rc = res_get(fh);
1772         mutex_unlock(&dev->lock);
1773
1774         if (unlikely(rc < 0))
1775                 return POLLERR;
1776
1777         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1778                 return POLLERR;
1779
1780         return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1781 }
1782
1783 /*
1784  * em28xx_v4l2_mmap()
1785  */
1786 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1787 {
1788         struct em28xx_fh *fh    = filp->private_data;
1789         struct em28xx    *dev   = fh->dev;
1790         int              rc;
1791
1792         rc = check_dev(dev);
1793         if (rc < 0)
1794                 return rc;
1795
1796         mutex_lock(&dev->lock);
1797         rc = res_get(fh);
1798         mutex_unlock(&dev->lock);
1799
1800         if (unlikely(rc < 0))
1801                 return rc;
1802
1803         rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1804
1805         em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1806                 (unsigned long)vma->vm_start,
1807                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1808                 rc);
1809
1810         return rc;
1811 }
1812
1813 static const struct file_operations em28xx_v4l_fops = {
1814         .owner         = THIS_MODULE,
1815         .open          = em28xx_v4l2_open,
1816         .release       = em28xx_v4l2_close,
1817         .read          = em28xx_v4l2_read,
1818         .poll          = em28xx_v4l2_poll,
1819         .mmap          = em28xx_v4l2_mmap,
1820         .ioctl         = video_ioctl2,
1821         .llseek        = no_llseek,
1822         .compat_ioctl  = v4l_compat_ioctl32,
1823 };
1824
1825 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1826         .vidioc_querycap            = vidioc_querycap,
1827         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1828         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1829         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1830         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1831         .vidioc_g_audio             = vidioc_g_audio,
1832         .vidioc_s_audio             = vidioc_s_audio,
1833         .vidioc_cropcap             = vidioc_cropcap,
1834
1835         .vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
1836         .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1837         .vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
1838
1839         .vidioc_reqbufs             = vidioc_reqbufs,
1840         .vidioc_querybuf            = vidioc_querybuf,
1841         .vidioc_qbuf                = vidioc_qbuf,
1842         .vidioc_dqbuf               = vidioc_dqbuf,
1843         .vidioc_s_std               = vidioc_s_std,
1844         .vidioc_enum_input          = vidioc_enum_input,
1845         .vidioc_g_input             = vidioc_g_input,
1846         .vidioc_s_input             = vidioc_s_input,
1847         .vidioc_queryctrl           = vidioc_queryctrl,
1848         .vidioc_g_ctrl              = vidioc_g_ctrl,
1849         .vidioc_s_ctrl              = vidioc_s_ctrl,
1850         .vidioc_streamon            = vidioc_streamon,
1851         .vidioc_streamoff           = vidioc_streamoff,
1852         .vidioc_g_tuner             = vidioc_g_tuner,
1853         .vidioc_s_tuner             = vidioc_s_tuner,
1854         .vidioc_g_frequency         = vidioc_g_frequency,
1855         .vidioc_s_frequency         = vidioc_s_frequency,
1856 #ifdef CONFIG_VIDEO_ADV_DEBUG
1857         .vidioc_g_register          = vidioc_g_register,
1858         .vidioc_s_register          = vidioc_s_register,
1859 #endif
1860 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1861         .vidiocgmbuf                = vidiocgmbuf,
1862 #endif
1863 };
1864
1865 static const struct video_device em28xx_video_template = {
1866         .fops                       = &em28xx_v4l_fops,
1867         .release                    = video_device_release,
1868         .ioctl_ops                  = &video_ioctl_ops,
1869
1870         .minor                      = -1,
1871
1872         .tvnorms                    = V4L2_STD_ALL,
1873         .current_norm               = V4L2_STD_PAL,
1874 };
1875
1876 static const struct file_operations radio_fops = {
1877         .owner         = THIS_MODULE,
1878         .open          = em28xx_v4l2_open,
1879         .release       = em28xx_v4l2_close,
1880         .ioctl         = video_ioctl2,
1881         .compat_ioctl  = v4l_compat_ioctl32,
1882         .llseek        = no_llseek,
1883 };
1884
1885 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1886         .vidioc_querycap      = radio_querycap,
1887         .vidioc_g_tuner       = radio_g_tuner,
1888         .vidioc_enum_input    = radio_enum_input,
1889         .vidioc_g_audio       = radio_g_audio,
1890         .vidioc_s_tuner       = radio_s_tuner,
1891         .vidioc_s_audio       = radio_s_audio,
1892         .vidioc_s_input       = radio_s_input,
1893         .vidioc_queryctrl     = radio_queryctrl,
1894         .vidioc_g_ctrl        = vidioc_g_ctrl,
1895         .vidioc_s_ctrl        = vidioc_s_ctrl,
1896         .vidioc_g_frequency   = vidioc_g_frequency,
1897         .vidioc_s_frequency   = vidioc_s_frequency,
1898 #ifdef CONFIG_VIDEO_ADV_DEBUG
1899         .vidioc_g_register    = vidioc_g_register,
1900         .vidioc_s_register    = vidioc_s_register,
1901 #endif
1902 };
1903
1904 static struct video_device em28xx_radio_template = {
1905         .name                 = "em28xx-radio",
1906         .fops                 = &radio_fops,
1907         .ioctl_ops            = &radio_ioctl_ops,
1908         .minor                = -1,
1909 };
1910
1911 /******************************** usb interface ******************************/
1912
1913
1914 static LIST_HEAD(em28xx_extension_devlist);
1915 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1916
1917 int em28xx_register_extension(struct em28xx_ops *ops)
1918 {
1919         struct em28xx *dev = NULL;
1920
1921         mutex_lock(&em28xx_devlist_mutex);
1922         mutex_lock(&em28xx_extension_devlist_lock);
1923         list_add_tail(&ops->next, &em28xx_extension_devlist);
1924         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1925                 if (dev)
1926                         ops->init(dev);
1927         }
1928         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1929         mutex_unlock(&em28xx_extension_devlist_lock);
1930         mutex_unlock(&em28xx_devlist_mutex);
1931         return 0;
1932 }
1933 EXPORT_SYMBOL(em28xx_register_extension);
1934
1935 void em28xx_unregister_extension(struct em28xx_ops *ops)
1936 {
1937         struct em28xx *dev = NULL;
1938
1939         mutex_lock(&em28xx_devlist_mutex);
1940         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1941                 if (dev)
1942                         ops->fini(dev);
1943         }
1944
1945         mutex_lock(&em28xx_extension_devlist_lock);
1946         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1947         list_del(&ops->next);
1948         mutex_unlock(&em28xx_extension_devlist_lock);
1949         mutex_unlock(&em28xx_devlist_mutex);
1950 }
1951 EXPORT_SYMBOL(em28xx_unregister_extension);
1952
1953 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1954                                              const struct video_device *template,
1955                                              const char *type_name)
1956 {
1957         struct video_device *vfd;
1958
1959         vfd = video_device_alloc();
1960         if (NULL == vfd)
1961                 return NULL;
1962         *vfd = *template;
1963         vfd->minor   = -1;
1964         vfd->parent = &dev->udev->dev;
1965         vfd->release = video_device_release;
1966         vfd->debug = video_debug;
1967
1968         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1969                  dev->name, type_name);
1970
1971         return vfd;
1972 }
1973
1974 static int register_analog_devices(struct em28xx *dev)
1975 {
1976         int ret;
1977
1978         /* allocate and fill video video_device struct */
1979         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1980         if (!dev->vdev) {
1981                 em28xx_errdev("cannot allocate video_device.\n");
1982                 return -ENODEV;
1983         }
1984
1985         /* register v4l2 video video_device */
1986         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1987                                        video_nr[dev->devno]);
1988         if (ret) {
1989                 em28xx_errdev("unable to register video device (error=%i).\n",
1990                               ret);
1991                 return ret;
1992         }
1993
1994         /* Allocate and fill vbi video_device struct */
1995         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1996
1997         /* register v4l2 vbi video_device */
1998         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1999                                         vbi_nr[dev->devno]);
2000         if (ret < 0) {
2001                 em28xx_errdev("unable to register vbi device\n");
2002                 return ret;
2003         }
2004
2005         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2006                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
2007                 if (!dev->radio_dev) {
2008                         em28xx_errdev("cannot allocate video_device.\n");
2009                         return -ENODEV;
2010                 }
2011                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2012                                             radio_nr[dev->devno]);
2013                 if (ret < 0) {
2014                         em28xx_errdev("can't register radio device\n");
2015                         return ret;
2016                 }
2017                 em28xx_info("Registered radio device as /dev/radio%d\n",
2018                             dev->radio_dev->num);
2019         }
2020
2021         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2022                                 dev->vdev->num, dev->vbi_dev->num);
2023
2024         return 0;
2025 }
2026
2027
2028 /*
2029  * em28xx_init_dev()
2030  * allocates and inits the device structs, registers i2c bus and v4l device
2031  */
2032 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2033                            int minor)
2034 {
2035         struct em28xx_ops *ops = NULL;
2036         struct em28xx *dev = *devhandle;
2037         int retval = -ENOMEM;
2038         int errCode;
2039         unsigned int maxh, maxw;
2040
2041         dev->udev = udev;
2042         mutex_init(&dev->lock);
2043         mutex_init(&dev->ctrl_urb_lock);
2044         spin_lock_init(&dev->slock);
2045         init_waitqueue_head(&dev->open);
2046         init_waitqueue_head(&dev->wait_frame);
2047         init_waitqueue_head(&dev->wait_stream);
2048
2049         dev->em28xx_write_regs = em28xx_write_regs;
2050         dev->em28xx_read_reg = em28xx_read_reg;
2051         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2052         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2053         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2054         dev->board.is_em2800 = em28xx_boards[dev->model].is_em2800;
2055
2056         em28xx_pre_card_setup(dev);
2057
2058         errCode = em28xx_config(dev);
2059         if (errCode) {
2060                 em28xx_errdev("error configuring device\n");
2061                 return -ENOMEM;
2062         }
2063
2064         /* register i2c bus */
2065         errCode = em28xx_i2c_register(dev);
2066         if (errCode < 0) {
2067                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2068                         __func__, errCode);
2069                 return errCode;
2070         }
2071
2072         /* Do board specific init and eeprom reading */
2073         em28xx_card_setup(dev);
2074
2075         /* Configure audio */
2076         errCode = em28xx_audio_setup(dev);
2077         if (errCode < 0) {
2078                 em28xx_errdev("%s: Error while setting audio - errCode [%d]!\n",
2079                         __func__, errCode);
2080         }
2081
2082         /* configure the device */
2083         em28xx_config_i2c(dev);
2084
2085         /* set default norm */
2086         dev->norm = em28xx_video_template.current_norm;
2087
2088         maxw = norm_maxw(dev);
2089         maxh = norm_maxh(dev);
2090
2091         /* set default image size */
2092         dev->width = maxw;
2093         dev->height = maxh;
2094         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2095         dev->hscale = 0;
2096         dev->vscale = 0;
2097         dev->ctl_input = 2;
2098
2099         errCode = em28xx_config(dev);
2100         if (errCode < 0) {
2101                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2102                         __func__, errCode);
2103                 return errCode;
2104         }
2105
2106         /* init video dma queues */
2107         INIT_LIST_HEAD(&dev->vidq.active);
2108         INIT_LIST_HEAD(&dev->vidq.queued);
2109
2110
2111         if (dev->board.has_msp34xx) {
2112                 /* Send a reset to other chips via gpio */
2113                 errCode = em28xx_write_reg(dev, EM28XX_R08_GPIO, 0xf7);
2114                 if (errCode < 0) {
2115                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2116                                 __func__, errCode);
2117                         return errCode;
2118                 }
2119                 msleep(3);
2120
2121                 errCode = em28xx_write_reg(dev, EM28XX_R08_GPIO, 0xff);
2122                 if (errCode < 0) {
2123                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2124                                 __func__, errCode);
2125                         return errCode;
2126                 }
2127                 msleep(3);
2128         }
2129
2130         video_mux(dev, 0);
2131
2132         mutex_lock(&em28xx_devlist_mutex);
2133         list_add_tail(&dev->devlist, &em28xx_devlist);
2134         retval = register_analog_devices(dev);
2135         if (retval < 0) {
2136                 em28xx_release_resources(dev);
2137                 mutex_unlock(&em28xx_devlist_mutex);
2138                 goto fail_reg_devices;
2139         }
2140
2141         mutex_lock(&em28xx_extension_devlist_lock);
2142         if (!list_empty(&em28xx_extension_devlist)) {
2143                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2144                         if (ops->id)
2145                                 ops->init(dev);
2146                 }
2147         }
2148         mutex_unlock(&em28xx_extension_devlist_lock);
2149         mutex_unlock(&em28xx_devlist_mutex);
2150
2151         /* Save some power by putting tuner to sleep */
2152         em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL);
2153
2154         return 0;
2155
2156 fail_reg_devices:
2157         mutex_unlock(&dev->lock);
2158         return retval;
2159 }
2160
2161 #if defined(CONFIG_MODULES) && defined(MODULE)
2162 static void request_module_async(struct work_struct *work)
2163 {
2164         struct em28xx *dev = container_of(work,
2165                              struct em28xx, request_module_wk);
2166
2167         if (dev->has_audio_class)
2168                 request_module("snd-usb-audio");
2169         else if (dev->has_alsa_audio)
2170                 request_module("em28xx-alsa");
2171
2172         if (dev->board.has_dvb)
2173                 request_module("em28xx-dvb");
2174 }
2175
2176 static void request_modules(struct em28xx *dev)
2177 {
2178         INIT_WORK(&dev->request_module_wk, request_module_async);
2179         schedule_work(&dev->request_module_wk);
2180 }
2181 #else
2182 #define request_modules(dev)
2183 #endif /* CONFIG_MODULES */
2184
2185 /*
2186  * em28xx_usb_probe()
2187  * checks for supported devices
2188  */
2189 static int em28xx_usb_probe(struct usb_interface *interface,
2190                             const struct usb_device_id *id)
2191 {
2192         const struct usb_endpoint_descriptor *endpoint;
2193         struct usb_device *udev;
2194         struct usb_interface *uif;
2195         struct em28xx *dev = NULL;
2196         int retval = -ENODEV;
2197         int i, nr, ifnum, isoc_pipe;
2198         char *speed;
2199         char descr[255] = "";
2200
2201         udev = usb_get_dev(interface_to_usbdev(interface));
2202         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2203
2204         /* Check to see next free device and mark as used */
2205         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2206         em28xx_devused |= 1<<nr;
2207
2208         /* Don't register audio interfaces */
2209         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2210                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): "
2211                         "interface %i, class %i\n",
2212                         le16_to_cpu(udev->descriptor.idVendor),
2213                         le16_to_cpu(udev->descriptor.idProduct),
2214                         ifnum,
2215                         interface->altsetting[0].desc.bInterfaceClass);
2216
2217                 em28xx_devused &= ~(1<<nr);
2218                 return -ENODEV;
2219         }
2220
2221         endpoint = &interface->cur_altsetting->endpoint[0].desc;
2222
2223         /* check if the device has the iso in endpoint at the correct place */
2224         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
2225             USB_ENDPOINT_XFER_ISOC &&
2226             (interface->altsetting[1].endpoint[0].desc.wMaxPacketSize == 940))
2227         {
2228                 /* It's a newer em2874/em2875 device */
2229                 isoc_pipe = 0;
2230         } else {
2231                 int check_interface = 1;
2232                 isoc_pipe = 1;
2233                 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2234                 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2235                     USB_ENDPOINT_XFER_ISOC)
2236                         check_interface = 0;
2237
2238                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
2239                         check_interface = 0;
2240
2241                 if (!check_interface) {
2242                         em28xx_err(DRIVER_NAME " video device (%04x:%04x): "
2243                                 "interface %i, class %i found.\n",
2244                                 le16_to_cpu(udev->descriptor.idVendor),
2245                                 le16_to_cpu(udev->descriptor.idProduct),
2246                                 ifnum,
2247                                 interface->altsetting[0].desc.bInterfaceClass);
2248
2249                         em28xx_err(DRIVER_NAME " This is an anciliary "
2250                                 "interface not used by the driver\n");
2251
2252                         em28xx_devused &= ~(1<<nr);
2253                         return -ENODEV;
2254                 }
2255         }
2256
2257         switch (udev->speed) {
2258         case USB_SPEED_LOW:
2259                 speed = "1.5";
2260                 break;
2261         case USB_SPEED_UNKNOWN:
2262         case USB_SPEED_FULL:
2263                 speed = "12";
2264                 break;
2265         case USB_SPEED_HIGH:
2266                 speed = "480";
2267                 break;
2268         default:
2269                 speed = "unknown";
2270         }
2271
2272         if (udev->manufacturer)
2273                 strlcpy(descr, udev->manufacturer, sizeof(descr));
2274
2275         if (udev->product) {
2276                 if (*descr)
2277                         strlcat(descr, " ", sizeof(descr));
2278                 strlcat(descr, udev->product, sizeof(descr));
2279         }
2280         if (*descr)
2281                 strlcat(descr, " ", sizeof(descr));
2282
2283         printk(DRIVER_NAME ": New device %s@ %s Mbps "
2284                 "(%04x:%04x, interface %d, class %d)\n",
2285                 descr,
2286                 speed,
2287                 le16_to_cpu(udev->descriptor.idVendor),
2288                 le16_to_cpu(udev->descriptor.idProduct),
2289                 ifnum,
2290                 interface->altsetting->desc.bInterfaceNumber);
2291
2292         if (nr >= EM28XX_MAXBOARDS) {
2293                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2294                                 EM28XX_MAXBOARDS);
2295                 em28xx_devused &= ~(1<<nr);
2296                 return -ENOMEM;
2297         }
2298
2299         /* allocate memory for our device state and initialize it */
2300         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2301         if (dev == NULL) {
2302                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2303                 em28xx_devused &= ~(1<<nr);
2304                 return -ENOMEM;
2305         }
2306
2307         snprintf(dev->name, 29, "em28xx #%d", nr);
2308         dev->devno = nr;
2309         dev->model = id->driver_info;
2310         dev->alt   = -1;
2311
2312         /* Checks if audio is provided by some interface */
2313         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2314                 uif = udev->config->interface[i];
2315                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2316                         dev->has_audio_class = 1;
2317                         break;
2318                 }
2319         }
2320
2321         /* compute alternate max packet sizes */
2322         uif = udev->actconfig->interface[0];
2323
2324         dev->num_alt = uif->num_altsetting;
2325         em28xx_videodbg("Alternate settings: %i\n", dev->num_alt);
2326 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2327         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2328
2329         if (dev->alt_max_pkt_size == NULL) {
2330                 em28xx_errdev("out of memory!\n");
2331                 em28xx_devused &= ~(1<<nr);
2332                 kfree(dev);
2333                 return -ENOMEM;
2334         }
2335
2336         for (i = 0; i < dev->num_alt ; i++) {
2337                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
2338                                                         wMaxPacketSize);
2339                 dev->alt_max_pkt_size[i] =
2340                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2341                 em28xx_videodbg("Alternate setting %i, max size= %i\n", i,
2342                                                 dev->alt_max_pkt_size[i]);
2343         }
2344
2345         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2346                 dev->model = card[nr];
2347
2348         /* allocate device struct */
2349         retval = em28xx_init_dev(&dev, udev, nr);
2350         if (retval) {
2351                 em28xx_devused &= ~(1<<dev->devno);
2352                 kfree(dev);
2353
2354                 return retval;
2355         }
2356
2357         /* save our data pointer in this interface device */
2358         usb_set_intfdata(interface, dev);
2359
2360         request_modules(dev);
2361
2362         return 0;
2363 }
2364
2365 /*
2366  * em28xx_usb_disconnect()
2367  * called when the device gets diconencted
2368  * video device will be unregistered on v4l2_close in case it is still open
2369  */
2370 static void em28xx_usb_disconnect(struct usb_interface *interface)
2371 {
2372         struct em28xx *dev;
2373         struct em28xx_ops *ops = NULL;
2374
2375         dev = usb_get_intfdata(interface);
2376         usb_set_intfdata(interface, NULL);
2377
2378         if (!dev)
2379                 return;
2380
2381         em28xx_info("disconnecting %s\n", dev->vdev->name);
2382
2383         /* wait until all current v4l2 io is finished then deallocate
2384            resources */
2385         mutex_lock(&dev->lock);
2386
2387         wake_up_interruptible_all(&dev->open);
2388
2389         if (dev->users) {
2390                 em28xx_warn
2391                     ("device /dev/video%d is open! Deregistration and memory "
2392                      "deallocation are deferred on close.\n",
2393                                 dev->vdev->num);
2394
2395                 dev->state |= DEV_MISCONFIGURED;
2396                 em28xx_uninit_isoc(dev);
2397                 dev->state |= DEV_DISCONNECTED;
2398                 wake_up_interruptible(&dev->wait_frame);
2399                 wake_up_interruptible(&dev->wait_stream);
2400         } else {
2401                 dev->state |= DEV_DISCONNECTED;
2402                 em28xx_release_resources(dev);
2403         }
2404         mutex_unlock(&dev->lock);
2405
2406         mutex_lock(&em28xx_extension_devlist_lock);
2407         if (!list_empty(&em28xx_extension_devlist)) {
2408                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2409                         ops->fini(dev);
2410                 }
2411         }
2412         mutex_unlock(&em28xx_extension_devlist_lock);
2413
2414         if (!dev->users) {
2415                 kfree(dev->alt_max_pkt_size);
2416                 kfree(dev);
2417         }
2418 }
2419
2420 static struct usb_driver em28xx_usb_driver = {
2421         .name = "em28xx",
2422         .probe = em28xx_usb_probe,
2423         .disconnect = em28xx_usb_disconnect,
2424         .id_table = em28xx_id_table,
2425 };
2426
2427 static int __init em28xx_module_init(void)
2428 {
2429         int result;
2430
2431         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2432                (EM28XX_VERSION_CODE >> 16) & 0xff,
2433                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2434 #ifdef SNAPSHOT
2435         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2436                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2437 #endif
2438
2439         /* register this driver with the USB subsystem */
2440         result = usb_register(&em28xx_usb_driver);
2441         if (result)
2442                 em28xx_err(DRIVER_NAME
2443                            " usb_register failed. Error number %d.\n", result);
2444
2445         return result;
2446 }
2447
2448 static void __exit em28xx_module_exit(void)
2449 {
2450         /* deregister this driver with the USB subsystem */
2451         usb_deregister(&em28xx_usb_driver);
2452 }
2453
2454 module_init(em28xx_module_init);
2455 module_exit(em28xx_module_exit);