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