drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
   3                     video capture devices
   4
   5    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   6                       Markus Rechberger <mrechberger@gmail.com>
   7                       Mauro Carvalho Chehab <mchehab@infradead.org>
   8                       Sascha Sommer <saschasommer@freenet.de>
   9
  10         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  11                 by Luca Risolia <luca.risolia@studio.unibo.it>
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/init.h>
  29 #include <linux/list.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/bitmap.h>
  33 #include <linux/usb.h>
  34 #include <linux/i2c.h>
  35 #include <linux/version.h>
  36 #include <linux/mm.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42 #include <media/msp3400.h>
  43 #include <media/tuner.h>
  44
  45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  46                       "Markus Rechberger <mrechberger@gmail.com>, " \
  47                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  48                       "Sascha Sommer <saschasommer@freenet.de>"
  49
  50 #define DRIVER_NAME         "em28xx"
  51 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  52 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 1, 0)
  53
  54 #define em28xx_videodbg(fmt, arg...) do {\
  55         if (video_debug) \
  56                 printk(KERN_INFO "%s %s :"fmt, \
  57                          dev->name, __func__ , ##arg); } while (0)
  58
  59 static unsigned int isoc_debug;
  60 module_param(isoc_debug, int, 0644);
  61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  62
  63 #define em28xx_isocdbg(fmt, arg...) \
  64 do {\
  65         if (isoc_debug) { \
  66                 printk(KERN_INFO "%s %s :"fmt, \
  67                          dev->name, __func__ , ##arg); \
  68         } \
  69   } while (0)
  70
  71 MODULE_AUTHOR(DRIVER_AUTHOR);
  72 MODULE_DESCRIPTION(DRIVER_DESC);
  73 MODULE_LICENSE("GPL");
  74
  75 static LIST_HEAD(em28xx_devlist);
  76 static DEFINE_MUTEX(em28xx_devlist_mutex);
  77
  78 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  79 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  80 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  81 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  82
  83 module_param_array(card,  int, NULL, 0444);
  84 module_param_array(video_nr, int, NULL, 0444);
  85 module_param_array(vbi_nr, int, NULL, 0444);
  86 module_param_array(radio_nr, int, NULL, 0444);
  87 MODULE_PARM_DESC(card,     "card type");
  88 MODULE_PARM_DESC(video_nr, "video device numbers");
  89 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  90 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  91
  92 static unsigned int video_debug;
  93 module_param(video_debug, int, 0644);
  94 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  95
  96 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  97 static unsigned long em28xx_devused;
  98
  99 /* supported controls */
 100 /* Common to all boards */
 101 static struct v4l2_queryctrl em28xx_qctrl[] = {
 102         {
 103                 .id = V4L2_CID_AUDIO_VOLUME,
 104                 .type = V4L2_CTRL_TYPE_INTEGER,
 105                 .name = "Volume",
 106                 .minimum = 0x0,
 107                 .maximum = 0x1f,
 108                 .step = 0x1,
 109                 .default_value = 0x1f,
 110                 .flags = 0,
 111         }, {
 112                 .id = V4L2_CID_AUDIO_MUTE,
 113                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 114                 .name = "Mute",
 115                 .minimum = 0,
 116                 .maximum = 1,
 117                 .step = 1,
 118                 .default_value = 1,
 119                 .flags = 0,
 120         }
 121 };
 122
 123 static struct usb_driver em28xx_usb_driver;
 124
 125 /* ------------------------------------------------------------------
 126         DMA and thread functions
 127    ------------------------------------------------------------------*/
 128
 129 /*
 130  * Announces that a buffer were filled and request the next
 131  */
 132 static inline void buffer_filled(struct em28xx *dev,
 133                                   struct em28xx_dmaqueue *dma_q,
 134                                   struct em28xx_buffer *buf)
 135 {
 136         /* Advice that buffer was filled */
 137         em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
 138         buf->vb.state = VIDEOBUF_DONE;
 139         buf->vb.field_count++;
 140         do_gettimeofday(&buf->vb.ts);
 141
 142         dev->isoc_ctl.buf = NULL;
 143
 144         list_del(&buf->vb.queue);
 145         wake_up(&buf->vb.done);
 146 }
 147
 148 /*
 149  * Identify the buffer header type and properly handles
 150  */
 151 static void em28xx_copy_video(struct em28xx *dev,
 152                               struct em28xx_dmaqueue  *dma_q,
 153                               struct em28xx_buffer *buf,
 154                               unsigned char *p,
 155                               unsigned char *outp, unsigned long len)
 156 {
 157         void *fieldstart, *startwrite, *startread;
 158         int  linesdone, currlinedone, offset, lencopy, remain;
 159         int bytesperline = dev->width << 1;
 160
 161         if (dma_q->pos + len > buf->vb.size)
 162                 len = buf->vb.size - dma_q->pos;
 163
 164         if (p[0] != 0x88 && p[0] != 0x22) {
 165                 em28xx_isocdbg("frame is not complete\n");
 166                 len += 4;
 167         } else
 168                 p += 4;
 169
 170         startread = p;
 171         remain = len;
 172
 173         /* Interlaces frame */
 174         if (buf->top_field)
 175                 fieldstart = outp;
 176         else
 177                 fieldstart = outp + bytesperline;
 178
 179         linesdone = dma_q->pos / bytesperline;
 180         currlinedone = dma_q->pos % bytesperline;
 181         offset = linesdone * bytesperline * 2 + currlinedone;
 182         startwrite = fieldstart + offset;
 183         lencopy = bytesperline - currlinedone;
 184         lencopy = lencopy > remain ? remain : lencopy;
 185
 186         if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 187                 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
 188                                ((char *)startwrite + lencopy) -
 189                                ((char *)outp + buf->vb.size));
 190                 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
 191         }
 192         if (lencopy <= 0)
 193                 return;
 194         memcpy(startwrite, startread, lencopy);
 195
 196         remain -= lencopy;
 197
 198         while (remain > 0) {
 199                 startwrite += lencopy + bytesperline;
 200                 startread += lencopy;
 201                 if (bytesperline > remain)
 202                         lencopy = remain;
 203                 else
 204                         lencopy = bytesperline;
 205
 206                 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
 207                         em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
 208                                        ((char *)startwrite + lencopy) -
 209                                        ((char *)outp + buf->vb.size));
 210                         lencopy = remain = (char *)outp + buf->vb.size -
 211                                            (char *)startwrite;
 212                 }
 213                 if (lencopy <= 0)
 214                         break;
 215
 216                 memcpy(startwrite, startread, lencopy);
 217
 218                 remain -= lencopy;
 219         }
 220
 221         dma_q->pos += len;
 222 }
 223
 224 static inline void print_err_status(struct em28xx *dev,
 225                                      int packet, int status)
 226 {
 227         char *errmsg = "Unknown";
 228
 229         switch (status) {
 230         case -ENOENT:
 231                 errmsg = "unlinked synchronuously";
 232                 break;
 233         case -ECONNRESET:
 234                 errmsg = "unlinked asynchronuously";
 235                 break;
 236         case -ENOSR:
 237                 errmsg = "Buffer error (overrun)";
 238                 break;
 239         case -EPIPE:
 240                 errmsg = "Stalled (device not responding)";
 241                 break;
 242         case -EOVERFLOW:
 243                 errmsg = "Babble (bad cable?)";
 244                 break;
 245         case -EPROTO:
 246                 errmsg = "Bit-stuff error (bad cable?)";
 247                 break;
 248         case -EILSEQ:
 249                 errmsg = "CRC/Timeout (could be anything)";
 250                 break;
 251         case -ETIME:
 252                 errmsg = "Device does not respond";
 253                 break;
 254         }
 255         if (packet < 0) {
 256                 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
 257         } else {
 258                 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
 259                                packet, status, errmsg);
 260         }
 261 }
 262
 263 /*
 264  * video-buf generic routine to get the next available buffer
 265  */
 266 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
 267                                           struct em28xx_buffer **buf)
 268 {
 269         struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
 270         char *outp;
 271
 272         if (list_empty(&dma_q->active)) {
 273                 em28xx_isocdbg("No active queue to serve\n");
 274                 dev->isoc_ctl.buf = NULL;
 275                 *buf = NULL;
 276                 return;
 277         }
 278
 279         /* Get the next buffer */
 280         *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
 281
 282         /* Cleans up buffer - Usefull for testing for frame/URB loss */
 283         outp = videobuf_to_vmalloc(&(*buf)->vb);
 284         memset(outp, 0, (*buf)->vb.size);
 285
 286         dev->isoc_ctl.buf = *buf;
 287
 288         return;
 289 }
 290
 291 /*
 292  * Controls the isoc copy of each urb packet
 293  */
 294 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
 295 {
 296         struct em28xx_buffer    *buf;
 297         struct em28xx_dmaqueue  *dma_q = urb->context;
 298         unsigned char *outp = NULL;
 299         int i, len = 0, rc = 1;
 300         unsigned char *p;
 301
 302         if (!dev)
 303                 return 0;
 304
 305         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 306                 return 0;
 307
 308         if (urb->status < 0) {
 309                 print_err_status(dev, -1, urb->status);
 310                 if (urb->status == -ENOENT)
 311                         return 0;
 312         }
 313
 314         buf = dev->isoc_ctl.buf;
 315         if (buf != NULL)
 316                 outp = videobuf_to_vmalloc(&buf->vb);
 317
 318         for (i = 0; i < urb->number_of_packets; i++) {
 319                 int status = urb->iso_frame_desc[i].status;
 320
 321                 if (status < 0) {
 322                         print_err_status(dev, i, status);
 323                         if (urb->iso_frame_desc[i].status != -EPROTO)
 324                                 continue;
 325                 }
 326
 327                 len = urb->iso_frame_desc[i].actual_length - 4;
 328
 329                 if (urb->iso_frame_desc[i].actual_length <= 0) {
 330                         /* em28xx_isocdbg("packet %d is empty",i); - spammy */
 331                         continue;
 332                 }
 333                 if (urb->iso_frame_desc[i].actual_length >
 334                                                 dev->max_pkt_size) {
 335                         em28xx_isocdbg("packet bigger than packet size");
 336                         continue;
 337                 }
 338
 339                 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 340
 341                 /* FIXME: incomplete buffer checks where removed to make
 342                    logic simpler. Impacts of those changes should be evaluated
 343                  */
 344                 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
 345                         em28xx_isocdbg("VBI HEADER!!!\n");
 346                         /* FIXME: Should add vbi copy */
 347                         continue;
 348                 }
 349                 if (p[0] == 0x22 && p[1] == 0x5a) {
 350                         em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
 351                                        len, (p[2] & 1)? "odd" : "even");
 352
 353                         if (!(p[2] & 1)) {
 354                                 if (buf != NULL)
 355                                         buffer_filled(dev, dma_q, buf);
 356                                 get_next_buf(dma_q, &buf);
 357                                 if (buf == NULL)
 358                                         outp = NULL;
 359                                 else
 360                                         outp = videobuf_to_vmalloc(&buf->vb);
 361                         }
 362
 363                         if (buf != NULL) {
 364                                 if (p[2] & 1)
 365                                         buf->top_field = 0;
 366                                 else
 367                                         buf->top_field = 1;
 368                         }
 369
 370                         dma_q->pos = 0;
 371                 }
 372                 if (buf != NULL)
 373                         em28xx_copy_video(dev, dma_q, buf, p, outp, len);
 374         }
 375         return rc;
 376 }
 377
 378 /* ------------------------------------------------------------------
 379         Videobuf operations
 380    ------------------------------------------------------------------*/
 381
 382 static int
 383 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 384 {
 385         struct em28xx_fh *fh = vq->priv_data;
 386         struct em28xx        *dev = fh->dev;
 387         struct v4l2_frequency f;
 388
 389         *size = 16 * fh->dev->width * fh->dev->height >> 3;
 390         if (0 == *count)
 391                 *count = EM28XX_DEF_BUF;
 392
 393         if (*count < EM28XX_MIN_BUF)
 394                 *count = EM28XX_MIN_BUF;
 395
 396         /* Ask tuner to go to analog mode */
 397         memset(&f, 0, sizeof(f));
 398         f.frequency = dev->ctl_freq;
 399
 400         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 401
 402         return 0;
 403 }
 404
 405 /* This is called *without* dev->slock held; please keep it that way */
 406 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
 407 {
 408         struct em28xx_fh     *fh  = vq->priv_data;
 409         struct em28xx        *dev = fh->dev;
 410         unsigned long flags = 0;
 411         if (in_interrupt())
 412                 BUG();
 413
 414         /* We used to wait for the buffer to finish here, but this didn't work
 415            because, as we were keeping the state as VIDEOBUF_QUEUED,
 416            videobuf_queue_cancel marked it as finished for us.
 417            (Also, it could wedge forever if the hardware was misconfigured.)
 418
 419            This should be safe; by the time we get here, the buffer isn't
 420            queued anymore. If we ever start marking the buffers as
 421            VIDEOBUF_ACTIVE, it won't be, though.
 422         */
 423         spin_lock_irqsave(&dev->slock, flags);
 424         if (dev->isoc_ctl.buf == buf)
 425                 dev->isoc_ctl.buf = NULL;
 426         spin_unlock_irqrestore(&dev->slock, flags);
 427
 428         videobuf_vmalloc_free(&buf->vb);
 429         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 430 }
 431
 432 static int
 433 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 434                                                 enum v4l2_field field)
 435 {
 436         struct em28xx_fh     *fh  = vq->priv_data;
 437         struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
 438         struct em28xx        *dev = fh->dev;
 439         int                  rc = 0, urb_init = 0;
 440
 441         /* FIXME: It assumes depth = 16 */
 442         /* The only currently supported format is 16 bits/pixel */
 443         buf->vb.size = 16 * dev->width * dev->height >> 3;
 444
 445         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 446                 return -EINVAL;
 447
 448         buf->vb.width  = dev->width;
 449         buf->vb.height = dev->height;
 450         buf->vb.field  = field;
 451
 452         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 453                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 454                 if (rc < 0)
 455                         goto fail;
 456         }
 457
 458         if (!dev->isoc_ctl.num_bufs)
 459                 urb_init = 1;
 460
 461         if (urb_init) {
 462                 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
 463                                       EM28XX_NUM_BUFS, dev->max_pkt_size,
 464                                       em28xx_isoc_copy);
 465                 if (rc < 0)
 466                         goto fail;
 467         }
 468
 469         buf->vb.state = VIDEOBUF_PREPARED;
 470         return 0;
 471
 472 fail:
 473         free_buffer(vq, buf);
 474         return rc;
 475 }
 476
 477 static void
 478 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 479 {
 480         struct em28xx_buffer    *buf     = container_of(vb, struct em28xx_buffer, vb);
 481         struct em28xx_fh        *fh      = vq->priv_data;
 482         struct em28xx           *dev     = fh->dev;
 483         struct em28xx_dmaqueue  *vidq    = &dev->vidq;
 484
 485         buf->vb.state = VIDEOBUF_QUEUED;
 486         list_add_tail(&buf->vb.queue, &vidq->active);
 487
 488 }
 489
 490 static void buffer_release(struct videobuf_queue *vq,
 491                                 struct videobuf_buffer *vb)
 492 {
 493         struct em28xx_buffer   *buf  = container_of(vb, struct em28xx_buffer, vb);
 494         struct em28xx_fh       *fh   = vq->priv_data;
 495         struct em28xx          *dev  = (struct em28xx *)fh->dev;
 496
 497         em28xx_isocdbg("em28xx: called buffer_release\n");
 498
 499         free_buffer(vq, buf);
 500 }
 501
 502 static struct videobuf_queue_ops em28xx_video_qops = {
 503         .buf_setup      = buffer_setup,
 504         .buf_prepare    = buffer_prepare,
 505         .buf_queue      = buffer_queue,
 506         .buf_release    = buffer_release,
 507 };
 508
 509 /*********************  v4l2 interface  **************************************/
 510
 511 /*
 512  * em28xx_config()
 513  * inits registers with sane defaults
 514  */
 515 static int em28xx_config(struct em28xx *dev)
 516 {
 517         int retval;
 518
 519         /* Sets I2C speed to 100 KHz */
 520         if (!dev->is_em2800) {
 521                 retval = em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 522                 if (retval < 0) {
 523                         em28xx_errdev("%s: em28xx_write_regs_req failed! retval [%d]\n",
 524                                 __func__, retval);
 525                         return retval;
 526                 }
 527         }
 528
 529         /* enable vbi capturing */
 530
 531 /*      em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
 532 /*      em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
 533         em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
 534
 535         dev->mute = 1;          /* maybe not the right place... */
 536         dev->volume = 0x1f;
 537
 538         em28xx_outfmt_set_yuv422(dev);
 539         em28xx_colorlevels_set_default(dev);
 540         em28xx_compression_disable(dev);
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * em28xx_config_i2c()
 547  * configure i2c attached devices
 548  */
 549 static void em28xx_config_i2c(struct em28xx *dev)
 550 {
 551         struct v4l2_routing route;
 552
 553         route.input = INPUT(dev->ctl_input)->vmux;
 554         route.output = 0;
 555         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 556         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 557         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 558 }
 559
 560 static void video_mux(struct em28xx *dev, int index)
 561 {
 562         struct v4l2_routing route;
 563
 564         route.input = INPUT(index)->vmux;
 565         route.output = 0;
 566         dev->ctl_input = index;
 567         dev->ctl_ainput = INPUT(index)->amux;
 568
 569         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 570
 571         if (dev->has_msp34xx) {
 572                 if (dev->i2s_speed) {
 573                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
 574                                 &dev->i2s_speed);
 575                 }
 576                 route.input = dev->ctl_ainput;
 577                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 578                 /* Note: this is msp3400 specific */
 579                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
 580                         &route);
 581         }
 582
 583         em28xx_audio_analog_set(dev);
 584 }
 585
 586 /* Usage lock check functions */
 587 static int res_get(struct em28xx_fh *fh)
 588 {
 589         struct em28xx    *dev = fh->dev;
 590         int              rc   = 0;
 591
 592         /* This instance already has stream_on */
 593         if (fh->stream_on)
 594                 return rc;
 595
 596         if (dev->stream_on)
 597                 return -EINVAL;
 598
 599         mutex_lock(&dev->lock);
 600         dev->stream_on = 1;
 601         fh->stream_on  = 1;
 602         mutex_unlock(&dev->lock);
 603         return rc;
 604 }
 605
 606 static int res_check(struct em28xx_fh *fh)
 607 {
 608         return (fh->stream_on);
 609 }
 610
 611 static void res_free(struct em28xx_fh *fh)
 612 {
 613         struct em28xx    *dev = fh->dev;
 614
 615         mutex_lock(&dev->lock);
 616         fh->stream_on = 0;
 617         dev->stream_on = 0;
 618         mutex_unlock(&dev->lock);
 619 }
 620
 621 /*
 622  * em28xx_get_ctrl()
 623  * return the current saturation, brightness or contrast, mute state
 624  */
 625 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 626 {
 627         switch (ctrl->id) {
 628         case V4L2_CID_AUDIO_MUTE:
 629                 ctrl->value = dev->mute;
 630                 return 0;
 631         case V4L2_CID_AUDIO_VOLUME:
 632                 ctrl->value = dev->volume;
 633                 return 0;
 634         default:
 635                 return -EINVAL;
 636         }
 637 }
 638
 639 /*
 640  * em28xx_set_ctrl()
 641  * mute or set new saturation, brightness or contrast
 642  */
 643 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 644 {
 645         switch (ctrl->id) {
 646         case V4L2_CID_AUDIO_MUTE:
 647                 if (ctrl->value != dev->mute) {
 648                         dev->mute = ctrl->value;
 649                         return em28xx_audio_analog_set(dev);
 650                 }
 651                 return 0;
 652         case V4L2_CID_AUDIO_VOLUME:
 653                 dev->volume = ctrl->value;
 654                 return em28xx_audio_analog_set(dev);
 655         default:
 656                 return -EINVAL;
 657         }
 658 }
 659
 660 static int check_dev(struct em28xx *dev)
 661 {
 662         if (dev->state & DEV_DISCONNECTED) {
 663                 em28xx_errdev("v4l2 ioctl: device not present\n");
 664                 return -ENODEV;
 665         }
 666
 667         if (dev->state & DEV_MISCONFIGURED) {
 668                 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
 669                               "close and open it again\n");
 670                 return -EIO;
 671         }
 672         return 0;
 673 }
 674
 675 static void get_scale(struct em28xx *dev,
 676                         unsigned int width, unsigned int height,
 677                         unsigned int *hscale, unsigned int *vscale)
 678 {
 679         unsigned int          maxw   = norm_maxw(dev);
 680         unsigned int          maxh   = norm_maxh(dev);
 681
 682         *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
 683         if (*hscale >= 0x4000)
 684                 *hscale = 0x3fff;
 685
 686         *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
 687         if (*vscale >= 0x4000)
 688                 *vscale = 0x3fff;
 689 }
 690
 691 /* ------------------------------------------------------------------
 692         IOCTL vidioc handling
 693    ------------------------------------------------------------------*/
 694
 695 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 696                                         struct v4l2_format *f)
 697 {
 698         struct em28xx_fh      *fh  = priv;
 699         struct em28xx         *dev = fh->dev;
 700
 701         mutex_lock(&dev->lock);
 702
 703         f->fmt.pix.width = dev->width;
 704         f->fmt.pix.height = dev->height;
 705         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 706         f->fmt.pix.bytesperline = dev->width * 2;
 707         f->fmt.pix.sizeimage = f->fmt.pix.bytesperline  * dev->height;
 708         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 709
 710         /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 711         f->fmt.pix.field = dev->interlaced ?
 712                            V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 713
 714         mutex_unlock(&dev->lock);
 715         return 0;
 716 }
 717
 718 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 719                         struct v4l2_format *f)
 720 {
 721         struct em28xx_fh      *fh    = priv;
 722         struct em28xx         *dev   = fh->dev;
 723         int                   width  = f->fmt.pix.width;
 724         int                   height = f->fmt.pix.height;
 725         unsigned int          maxw   = norm_maxw(dev);
 726         unsigned int          maxh   = norm_maxh(dev);
 727         unsigned int          hscale, vscale;
 728
 729         /* width must even because of the YUYV format
 730            height must be even because of interlacing */
 731         height &= 0xfffe;
 732         width &= 0xfffe;
 733
 734         if (height < 32)
 735                 height = 32;
 736         if (height > maxh)
 737                 height = maxh;
 738         if (width < 48)
 739                 width = 48;
 740         if (width > maxw)
 741                 width = maxw;
 742
 743         mutex_lock(&dev->lock);
 744
 745         if (dev->is_em2800) {
 746                 /* the em2800 can only scale down to 50% */
 747                 if (height % (maxh / 2))
 748                         height = maxh;
 749                 if (width % (maxw / 2))
 750                         width = maxw;
 751                 /* according to empiatech support */
 752                 /* the MaxPacketSize is to small to support */
 753                 /* framesizes larger than 640x480 @ 30 fps */
 754                 /* or 640x576 @ 25 fps. As this would cut */
 755                 /* of a part of the image we prefer */
 756                 /* 360x576 or 360x480 for now */
 757                 if (width == maxw && height == maxh)
 758                         width /= 2;
 759         }
 760
 761         get_scale(dev, width, height, &hscale, &vscale);
 762
 763         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 764         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 765
 766         f->fmt.pix.width = width;
 767         f->fmt.pix.height = height;
 768         f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 769         f->fmt.pix.bytesperline = width * 2;
 770         f->fmt.pix.sizeimage = width * 2 * height;
 771         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 772         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 773
 774         mutex_unlock(&dev->lock);
 775         return 0;
 776 }
 777
 778 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 779                         struct v4l2_format *f)
 780 {
 781         struct em28xx_fh      *fh  = priv;
 782         struct em28xx         *dev = fh->dev;
 783         int                   rc;
 784
 785         rc = check_dev(dev);
 786         if (rc < 0)
 787                 return rc;
 788
 789         vidioc_try_fmt_vid_cap(file, priv, f);
 790
 791         mutex_lock(&dev->lock);
 792
 793         if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 794                 em28xx_errdev("%s queue busy\n", __func__);
 795                 rc = -EBUSY;
 796                 goto out;
 797         }
 798
 799         if (dev->stream_on && !fh->stream_on) {
 800                 em28xx_errdev("%s device in use by another fh\n", __func__);
 801                 rc = -EBUSY;
 802                 goto out;
 803         }
 804
 805         /* set new image size */
 806         dev->width = f->fmt.pix.width;
 807         dev->height = f->fmt.pix.height;
 808         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 809
 810         em28xx_set_alternate(dev);
 811         em28xx_resolution_set(dev);
 812
 813         rc = 0;
 814
 815 out:
 816         mutex_unlock(&dev->lock);
 817         return rc;
 818 }
 819
 820 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
 821 {
 822         struct em28xx_fh   *fh  = priv;
 823         struct em28xx      *dev = fh->dev;
 824         struct v4l2_format f;
 825         int                rc;
 826
 827         rc = check_dev(dev);
 828         if (rc < 0)
 829                 return rc;
 830
 831         mutex_lock(&dev->lock);
 832         dev->norm = *norm;
 833         mutex_unlock(&dev->lock);
 834
 835         /* Adjusts width/height, if needed */
 836         f.fmt.pix.width = dev->width;
 837         f.fmt.pix.height = dev->height;
 838         vidioc_try_fmt_vid_cap(file, priv, &f);
 839
 840         mutex_lock(&dev->lock);
 841
 842         /* set new image size */
 843         dev->width = f.fmt.pix.width;
 844         dev->height = f.fmt.pix.height;
 845         get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 846
 847         em28xx_resolution_set(dev);
 848         em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
 849
 850         mutex_unlock(&dev->lock);
 851         return 0;
 852 }
 853
 854 static const char *iname[] = {
 855         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 856         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 857         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 858         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 859         [EM28XX_VMUX_SVIDEO]     = "S-Video",
 860         [EM28XX_VMUX_TELEVISION] = "Television",
 861         [EM28XX_VMUX_CABLE]      = "Cable TV",
 862         [EM28XX_VMUX_DVB]        = "DVB",
 863         [EM28XX_VMUX_DEBUG]      = "for debug only",
 864 };
 865
 866 static int vidioc_enum_input(struct file *file, void *priv,
 867                                 struct v4l2_input *i)
 868 {
 869         struct em28xx_fh   *fh  = priv;
 870         struct em28xx      *dev = fh->dev;
 871         unsigned int       n;
 872
 873         n = i->index;
 874         if (n >= MAX_EM28XX_INPUT)
 875                 return -EINVAL;
 876         if (0 == INPUT(n)->type)
 877                 return -EINVAL;
 878
 879         i->index = n;
 880         i->type = V4L2_INPUT_TYPE_CAMERA;
 881
 882         strcpy(i->name, iname[INPUT(n)->type]);
 883
 884         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 885                 (EM28XX_VMUX_CABLE == INPUT(n)->type))
 886                 i->type = V4L2_INPUT_TYPE_TUNER;
 887
 888         i->std = dev->vdev->tvnorms;
 889
 890         return 0;
 891 }
 892
 893 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 894 {
 895         struct em28xx_fh   *fh  = priv;
 896         struct em28xx      *dev = fh->dev;
 897
 898         *i = dev->ctl_input;
 899
 900         return 0;
 901 }
 902
 903 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 904 {
 905         struct em28xx_fh   *fh  = priv;
 906         struct em28xx      *dev = fh->dev;
 907         int                rc;
 908
 909         rc = check_dev(dev);
 910         if (rc < 0)
 911                 return rc;
 912
 913         if (i >= MAX_EM28XX_INPUT)
 914                 return -EINVAL;
 915         if (0 == INPUT(i)->type)
 916                 return -EINVAL;
 917
 918         mutex_lock(&dev->lock);
 919
 920         video_mux(dev, i);
 921
 922         mutex_unlock(&dev->lock);
 923         return 0;
 924 }
 925
 926 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 927 {
 928         struct em28xx_fh   *fh    = priv;
 929         struct em28xx      *dev   = fh->dev;
 930         unsigned int        index = a->index;
 931
 932         if (a->index > 1)
 933                 return -EINVAL;
 934
 935         index = dev->ctl_ainput;
 936
 937         if (index == 0)
 938                 strcpy(a->name, "Television");
 939         else
 940                 strcpy(a->name, "Line In");
 941
 942         a->capability = V4L2_AUDCAP_STEREO;
 943         a->index = index;
 944
 945         return 0;
 946 }
 947
 948 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
 949 {
 950         struct em28xx_fh   *fh  = priv;
 951         struct em28xx      *dev = fh->dev;
 952
 953         if (a->index != dev->ctl_ainput)
 954                 return -EINVAL;
 955
 956         return 0;
 957 }
 958
 959 static int vidioc_queryctrl(struct file *file, void *priv,
 960                                 struct v4l2_queryctrl *qc)
 961 {
 962         struct em28xx_fh      *fh  = priv;
 963         struct em28xx         *dev = fh->dev;
 964         int                   id  = qc->id;
 965         int                   i;
 966         int                   rc;
 967
 968         rc = check_dev(dev);
 969         if (rc < 0)
 970                 return rc;
 971
 972         memset(qc, 0, sizeof(*qc));
 973
 974         qc->id = id;
 975
 976         if (!dev->has_msp34xx) {
 977                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
 978                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
 979                                 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
 980                                 return 0;
 981                         }
 982                 }
 983         }
 984         mutex_lock(&dev->lock);
 985         em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
 986         mutex_unlock(&dev->lock);
 987
 988         if (qc->type)
 989                 return 0;
 990         else
 991                 return -EINVAL;
 992 }
 993
 994 static int vidioc_g_ctrl(struct file *file, void *priv,
 995                                 struct v4l2_control *ctrl)
 996 {
 997         struct em28xx_fh      *fh  = priv;
 998         struct em28xx         *dev = fh->dev;
 999         int                   rc;
1000
1001         rc = check_dev(dev);
1002         if (rc < 0)
1003                 return rc;
1004         mutex_lock(&dev->lock);
1005
1006         if (!dev->has_msp34xx)
1007                 rc = em28xx_get_ctrl(dev, ctrl);
1008         else
1009                 rc = -EINVAL;
1010
1011         if (rc == -EINVAL) {
1012                 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1013                 rc = 0;
1014         }
1015
1016         mutex_unlock(&dev->lock);
1017         return rc;
1018 }
1019
1020 static int vidioc_s_ctrl(struct file *file, void *priv,
1021                                 struct v4l2_control *ctrl)
1022 {
1023         struct em28xx_fh      *fh  = priv;
1024         struct em28xx         *dev = fh->dev;
1025         u8                    i;
1026         int                   rc;
1027
1028         rc = check_dev(dev);
1029         if (rc < 0)
1030                 return rc;
1031
1032         mutex_lock(&dev->lock);
1033
1034         if (dev->has_msp34xx)
1035                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1036         else {
1037                 rc = 1;
1038                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1039                         if (ctrl->id == em28xx_qctrl[i].id) {
1040                                 if (ctrl->value < em28xx_qctrl[i].minimum ||
1041                                     ctrl->value > em28xx_qctrl[i].maximum) {
1042                                         rc = -ERANGE;
1043                                         break;
1044                                 }
1045
1046                                 rc = em28xx_set_ctrl(dev, ctrl);
1047                                 break;
1048                         }
1049                 }
1050         }
1051
1052         /* Control not found - try to send it to the attached devices */
1053         if (rc == 1) {
1054                 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1055                 rc = 0;
1056         }
1057
1058         mutex_unlock(&dev->lock);
1059         return rc;
1060 }
1061
1062 static int vidioc_g_tuner(struct file *file, void *priv,
1063                                 struct v4l2_tuner *t)
1064 {
1065         struct em28xx_fh      *fh  = priv;
1066         struct em28xx         *dev = fh->dev;
1067         int                   rc;
1068
1069         rc = check_dev(dev);
1070         if (rc < 0)
1071                 return rc;
1072
1073         if (0 != t->index)
1074                 return -EINVAL;
1075
1076         strcpy(t->name, "Tuner");
1077
1078         mutex_lock(&dev->lock);
1079
1080         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1081
1082         mutex_unlock(&dev->lock);
1083         return 0;
1084 }
1085
1086 static int vidioc_s_tuner(struct file *file, void *priv,
1087                                 struct v4l2_tuner *t)
1088 {
1089         struct em28xx_fh      *fh  = priv;
1090         struct em28xx         *dev = fh->dev;
1091         int                   rc;
1092
1093         rc = check_dev(dev);
1094         if (rc < 0)
1095                 return rc;
1096
1097         if (0 != t->index)
1098                 return -EINVAL;
1099
1100         mutex_lock(&dev->lock);
1101
1102         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1103
1104         mutex_unlock(&dev->lock);
1105         return 0;
1106 }
1107
1108 static int vidioc_g_frequency(struct file *file, void *priv,
1109                                 struct v4l2_frequency *f)
1110 {
1111         struct em28xx_fh      *fh  = priv;
1112         struct em28xx         *dev = fh->dev;
1113
1114         f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1115         f->frequency = dev->ctl_freq;
1116
1117         return 0;
1118 }
1119
1120 static int vidioc_s_frequency(struct file *file, void *priv,
1121                                 struct v4l2_frequency *f)
1122 {
1123         struct em28xx_fh      *fh  = priv;
1124         struct em28xx         *dev = fh->dev;
1125         int                   rc;
1126
1127         rc = check_dev(dev);
1128         if (rc < 0)
1129                 return rc;
1130
1131         if (0 != f->tuner)
1132                 return -EINVAL;
1133
1134         if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1135                 return -EINVAL;
1136         if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1137                 return -EINVAL;
1138
1139         mutex_lock(&dev->lock);
1140
1141         dev->ctl_freq = f->frequency;
1142         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1143
1144         mutex_unlock(&dev->lock);
1145         return 0;
1146 }
1147
1148 #ifdef CONFIG_VIDEO_ADV_DEBUG
1149 static int em28xx_reg_len(int reg)
1150 {
1151         switch (reg) {
1152         case EM28XX_R40_AC97LSB:
1153         case EM28XX_R30_HSCALELOW:
1154         case EM28XX_R32_VSCALELOW:
1155                 return 2;
1156         default:
1157                 return 1;
1158         }
1159 }
1160
1161 static int vidioc_g_register(struct file *file, void *priv,
1162                              struct v4l2_register *reg)
1163 {
1164         struct em28xx_fh      *fh  = priv;
1165         struct em28xx         *dev = fh->dev;
1166         int ret;
1167
1168         if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1169                 return -EINVAL;
1170
1171         if (em28xx_reg_len(reg->reg) == 1) {
1172                 ret = em28xx_read_reg(dev, reg->reg);
1173                 if (ret < 0)
1174                         return ret;
1175
1176                 reg->val = ret;
1177         } else {
1178                 __le64 val = 0;
1179                 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1180                                                    reg->reg, (char *)&val, 2);
1181                 if (ret < 0)
1182                         return ret;
1183
1184                 reg->val = le64_to_cpu(val);
1185         }
1186
1187         return 0;
1188 }
1189
1190 static int vidioc_s_register(struct file *file, void *priv,
1191                              struct v4l2_register *reg)
1192 {
1193         struct em28xx_fh      *fh  = priv;
1194         struct em28xx         *dev = fh->dev;
1195         __le64 buf;
1196
1197         buf = cpu_to_le64(reg->val);
1198
1199         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1200                                  em28xx_reg_len(reg->reg));
1201 }
1202 #endif
1203
1204
1205 static int vidioc_cropcap(struct file *file, void *priv,
1206                                         struct v4l2_cropcap *cc)
1207 {
1208         struct em28xx_fh      *fh  = priv;
1209         struct em28xx         *dev = fh->dev;
1210
1211         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1212                 return -EINVAL;
1213
1214         cc->bounds.left = 0;
1215         cc->bounds.top = 0;
1216         cc->bounds.width = dev->width;
1217         cc->bounds.height = dev->height;
1218         cc->defrect = cc->bounds;
1219         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1220         cc->pixelaspect.denominator = 59;
1221
1222         return 0;
1223 }
1224
1225 static int vidioc_streamon(struct file *file, void *priv,
1226                                         enum v4l2_buf_type type)
1227 {
1228         struct em28xx_fh      *fh  = priv;
1229         struct em28xx         *dev = fh->dev;
1230         int                   rc;
1231
1232         rc = check_dev(dev);
1233         if (rc < 0)
1234                 return rc;
1235
1236
1237         if (unlikely(res_get(fh) < 0))
1238                 return -EBUSY;
1239
1240         return (videobuf_streamon(&fh->vb_vidq));
1241 }
1242
1243 static int vidioc_streamoff(struct file *file, void *priv,
1244                                         enum v4l2_buf_type type)
1245 {
1246         struct em28xx_fh      *fh  = priv;
1247         struct em28xx         *dev = fh->dev;
1248         int                   rc;
1249
1250         rc = check_dev(dev);
1251         if (rc < 0)
1252                 return rc;
1253
1254         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1255                 return -EINVAL;
1256         if (type != fh->type)
1257                 return -EINVAL;
1258
1259         videobuf_streamoff(&fh->vb_vidq);
1260         res_free(fh);
1261
1262         return 0;
1263 }
1264
1265 static int vidioc_querycap(struct file *file, void  *priv,
1266                                         struct v4l2_capability *cap)
1267 {
1268         struct em28xx_fh      *fh  = priv;
1269         struct em28xx         *dev = fh->dev;
1270
1271         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1272         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1273         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1274
1275         cap->version = EM28XX_VERSION_CODE;
1276
1277         cap->capabilities =
1278                         V4L2_CAP_SLICED_VBI_CAPTURE |
1279                         V4L2_CAP_VIDEO_CAPTURE |
1280                         V4L2_CAP_AUDIO |
1281                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1282
1283         if (dev->tuner_type != TUNER_ABSENT)
1284                 cap->capabilities |= V4L2_CAP_TUNER;
1285
1286         return 0;
1287 }
1288
1289 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1290                                         struct v4l2_fmtdesc *fmtd)
1291 {
1292         if (fmtd->index != 0)
1293                 return -EINVAL;
1294
1295         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1296         strcpy(fmtd->description, "Packed YUY2");
1297         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1298         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1299
1300         return 0;
1301 }
1302
1303 /* Sliced VBI ioctls */
1304 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1305                                         struct v4l2_format *f)
1306 {
1307         struct em28xx_fh      *fh  = priv;
1308         struct em28xx         *dev = fh->dev;
1309         int                   rc;
1310
1311         rc = check_dev(dev);
1312         if (rc < 0)
1313                 return rc;
1314
1315         mutex_lock(&dev->lock);
1316
1317         f->fmt.sliced.service_set = 0;
1318
1319         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1320
1321         if (f->fmt.sliced.service_set == 0)
1322                 rc = -EINVAL;
1323
1324         mutex_unlock(&dev->lock);
1325         return rc;
1326 }
1327
1328 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1329                         struct v4l2_format *f)
1330 {
1331         struct em28xx_fh      *fh  = priv;
1332         struct em28xx         *dev = fh->dev;
1333         int                   rc;
1334
1335         rc = check_dev(dev);
1336         if (rc < 0)
1337                 return rc;
1338
1339         mutex_lock(&dev->lock);
1340         em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1341         mutex_unlock(&dev->lock);
1342
1343         if (f->fmt.sliced.service_set == 0)
1344                 return -EINVAL;
1345
1346         return 0;
1347 }
1348
1349
1350 static int vidioc_reqbufs(struct file *file, void *priv,
1351                           struct v4l2_requestbuffers *rb)
1352 {
1353         struct em28xx_fh      *fh  = priv;
1354         struct em28xx         *dev = fh->dev;
1355         int                   rc;
1356
1357         rc = check_dev(dev);
1358         if (rc < 0)
1359                 return rc;
1360
1361         return (videobuf_reqbufs(&fh->vb_vidq, rb));
1362 }
1363
1364 static int vidioc_querybuf(struct file *file, void *priv,
1365                            struct v4l2_buffer *b)
1366 {
1367         struct em28xx_fh      *fh  = priv;
1368         struct em28xx         *dev = fh->dev;
1369         int                   rc;
1370
1371         rc = check_dev(dev);
1372         if (rc < 0)
1373                 return rc;
1374
1375         return (videobuf_querybuf(&fh->vb_vidq, b));
1376 }
1377
1378 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
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_qbuf(&fh->vb_vidq, b));
1389 }
1390
1391 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1392 {
1393         struct em28xx_fh      *fh  = priv;
1394         struct em28xx         *dev = fh->dev;
1395         int                   rc;
1396
1397         rc = check_dev(dev);
1398         if (rc < 0)
1399                 return rc;
1400
1401         return (videobuf_dqbuf(&fh->vb_vidq, b,
1402                                 file->f_flags & O_NONBLOCK));
1403 }
1404
1405 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1406 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1407 {
1408         struct em28xx_fh  *fh = priv;
1409
1410         return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1411 }
1412 #endif
1413
1414
1415 /* ----------------------------------------------------------- */
1416 /* RADIO ESPECIFIC IOCTLS                                      */
1417 /* ----------------------------------------------------------- */
1418
1419 static int radio_querycap(struct file *file, void  *priv,
1420                           struct v4l2_capability *cap)
1421 {
1422         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1423
1424         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1425         strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1426         strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1427
1428         cap->version = EM28XX_VERSION_CODE;
1429         cap->capabilities = V4L2_CAP_TUNER;
1430         return 0;
1431 }
1432
1433 static int radio_g_tuner(struct file *file, void *priv,
1434                          struct v4l2_tuner *t)
1435 {
1436         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1437
1438         if (unlikely(t->index > 0))
1439                 return -EINVAL;
1440
1441         strcpy(t->name, "Radio");
1442         t->type = V4L2_TUNER_RADIO;
1443
1444         em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1445         return 0;
1446 }
1447
1448 static int radio_enum_input(struct file *file, void *priv,
1449                             struct v4l2_input *i)
1450 {
1451         if (i->index != 0)
1452                 return -EINVAL;
1453         strcpy(i->name, "Radio");
1454         i->type = V4L2_INPUT_TYPE_TUNER;
1455
1456         return 0;
1457 }
1458
1459 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1460 {
1461         if (unlikely(a->index))
1462                 return -EINVAL;
1463
1464         strcpy(a->name, "Radio");
1465         return 0;
1466 }
1467
1468 static int radio_s_tuner(struct file *file, void *priv,
1469                          struct v4l2_tuner *t)
1470 {
1471         struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1472
1473         if (0 != t->index)
1474                 return -EINVAL;
1475
1476         em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1477
1478         return 0;
1479 }
1480
1481 static int radio_s_audio(struct file *file, void *fh,
1482                          struct v4l2_audio *a)
1483 {
1484         return 0;
1485 }
1486
1487 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1488 {
1489         return 0;
1490 }
1491
1492 static int radio_queryctrl(struct file *file, void *priv,
1493                            struct v4l2_queryctrl *qc)
1494 {
1495         int i;
1496
1497         if (qc->id <  V4L2_CID_BASE ||
1498                 qc->id >= V4L2_CID_LASTP1)
1499                 return -EINVAL;
1500
1501         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1502                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1503                         memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1504                         return 0;
1505                 }
1506         }
1507
1508         return -EINVAL;
1509 }
1510
1511 /*
1512  * em28xx_v4l2_open()
1513  * inits the device and starts isoc transfer
1514  */
1515 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1516 {
1517         int minor = iminor(inode);
1518         int errCode = 0, radio = 0;
1519         struct em28xx *h, *dev = NULL;
1520         struct em28xx_fh *fh;
1521         enum v4l2_buf_type fh_type = 0;
1522
1523         mutex_lock(&em28xx_devlist_mutex);
1524         list_for_each_entry(h, &em28xx_devlist, devlist) {
1525                 if (h->vdev->minor == minor) {
1526                         dev  = h;
1527                         fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1528                 }
1529                 if (h->vbi_dev->minor == minor) {
1530                         dev  = h;
1531                         fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1532                 }
1533                 if (h->radio_dev &&
1534                     h->radio_dev->minor == minor) {
1535                         radio = 1;
1536                         dev   = h;
1537                 }
1538         }
1539         mutex_unlock(&em28xx_devlist_mutex);
1540         if (NULL == dev)
1541                 return -ENODEV;
1542
1543         mutex_lock(&dev->lock);
1544
1545         em28xx_videodbg("open minor=%d type=%s users=%d\n",
1546                                 minor, v4l2_type_names[fh_type], dev->users);
1547
1548
1549         fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1550         if (!fh) {
1551                 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1552                 mutex_unlock(&dev->lock);
1553                 return -ENOMEM;
1554         }
1555         fh->dev = dev;
1556         fh->radio = radio;
1557         fh->type = fh_type;
1558         filp->private_data = fh;
1559
1560         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1561                 dev->width = norm_maxw(dev);
1562                 dev->height = norm_maxh(dev);
1563                 dev->hscale = 0;
1564                 dev->vscale = 0;
1565
1566                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1567                 em28xx_set_alternate(dev);
1568                 em28xx_resolution_set(dev);
1569
1570                 /* Needed, since GPIO might have disabled power of
1571                    some i2c device
1572                  */
1573                 em28xx_config_i2c(dev);
1574
1575         }
1576         if (fh->radio) {
1577                 em28xx_videodbg("video_open: setting radio device\n");
1578                 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1579         }
1580
1581         dev->users++;
1582
1583         videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1584                         NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1585                         sizeof(struct em28xx_buffer), fh);
1586
1587         mutex_unlock(&dev->lock);
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_devlist_mutex);
1875         mutex_lock(&em28xx_extension_devlist_lock);
1876         list_add_tail(&ops->next, &em28xx_extension_devlist);
1877         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1878                 if (dev)
1879                         ops->init(dev);
1880         }
1881         printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1882         mutex_unlock(&em28xx_extension_devlist_lock);
1883         mutex_unlock(&em28xx_devlist_mutex);
1884         return 0;
1885 }
1886 EXPORT_SYMBOL(em28xx_register_extension);
1887
1888 void em28xx_unregister_extension(struct em28xx_ops *ops)
1889 {
1890         struct em28xx *dev = NULL;
1891
1892         mutex_lock(&em28xx_devlist_mutex);
1893         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1894                 if (dev)
1895                         ops->fini(dev);
1896         }
1897
1898         mutex_lock(&em28xx_extension_devlist_lock);
1899         printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1900         list_del(&ops->next);
1901         mutex_unlock(&em28xx_extension_devlist_lock);
1902         mutex_unlock(&em28xx_devlist_mutex);
1903 }
1904 EXPORT_SYMBOL(em28xx_unregister_extension);
1905
1906 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1907                                              const struct video_device *template,
1908                                              const char *type_name)
1909 {
1910         struct video_device *vfd;
1911
1912         vfd = video_device_alloc();
1913         if (NULL == vfd)
1914                 return NULL;
1915         *vfd = *template;
1916         vfd->minor   = -1;
1917         vfd->parent = &dev->udev->dev;
1918         vfd->release = video_device_release;
1919         vfd->debug = video_debug;
1920
1921         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1922                  dev->name, type_name);
1923
1924         return vfd;
1925 }
1926
1927
1928 static int register_analog_devices(struct em28xx *dev)
1929 {
1930         int ret;
1931
1932         /* allocate and fill video video_device struct */
1933         dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1934         if (!dev->vdev) {
1935                 em28xx_errdev("cannot allocate video_device.\n");
1936                 return -ENODEV;
1937         }
1938
1939         /* register v4l2 video video_device */
1940         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1941                                        video_nr[dev->devno]);
1942         if (ret) {
1943                 em28xx_errdev("unable to register video device (error=%i).\n",
1944                               ret);
1945                 return ret;
1946         }
1947
1948         /* Allocate and fill vbi video_device struct */
1949         dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
1950
1951         /* register v4l2 vbi video_device */
1952         ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1953                                         vbi_nr[dev->devno]);
1954         if (ret < 0) {
1955                 em28xx_errdev("unable to register vbi device\n");
1956                 return ret;
1957         }
1958
1959         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1960                 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, "radio");
1961                 if (!dev->radio_dev) {
1962                         em28xx_errdev("cannot allocate video_device.\n");
1963                         return -ENODEV;
1964                 }
1965                 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1966                                             radio_nr[dev->devno]);
1967                 if (ret < 0) {
1968                         em28xx_errdev("can't register radio device\n");
1969                         return ret;
1970                 }
1971                 em28xx_info("Registered radio device as /dev/radio%d\n",
1972                             dev->radio_dev->num);
1973         }
1974
1975         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1976                                 dev->vdev->num, dev->vbi_dev->num);
1977
1978         return 0;
1979 }
1980
1981
1982 /*
1983  * em28xx_init_dev()
1984  * allocates and inits the device structs, registers i2c bus and v4l device
1985  */
1986 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1987                            int minor)
1988 {
1989         struct em28xx_ops *ops = NULL;
1990         struct em28xx *dev = *devhandle;
1991         int retval = -ENOMEM;
1992         int errCode;
1993         unsigned int maxh, maxw;
1994
1995         dev->udev = udev;
1996         mutex_init(&dev->lock);
1997         mutex_init(&dev->ctrl_urb_lock);
1998         spin_lock_init(&dev->slock);
1999         init_waitqueue_head(&dev->open);
2000         init_waitqueue_head(&dev->wait_frame);
2001         init_waitqueue_head(&dev->wait_stream);
2002
2003         dev->em28xx_write_regs = em28xx_write_regs;
2004         dev->em28xx_read_reg = em28xx_read_reg;
2005         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2006         dev->em28xx_write_regs_req = em28xx_write_regs_req;
2007         dev->em28xx_read_reg_req = em28xx_read_reg_req;
2008         dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2009
2010         em28xx_pre_card_setup(dev);
2011
2012         errCode = em28xx_config(dev);
2013         if (errCode) {
2014                 em28xx_errdev("error configuring device\n");
2015                 return -ENOMEM;
2016         }
2017
2018         /* register i2c bus */
2019         errCode = em28xx_i2c_register(dev);
2020         if (errCode < 0) {
2021                 em28xx_errdev("%s: em28xx_i2c_register - errCode [%d]!\n",
2022                         __func__, errCode);
2023                 return errCode;
2024         }
2025
2026         /* Do board specific init and eeprom reading */
2027         em28xx_card_setup(dev);
2028
2029         /* Configure audio */
2030         errCode = em28xx_audio_analog_set(dev);
2031         if (errCode < 0) {
2032                 em28xx_errdev("%s: em28xx_audio_analog_set - errCode [%d]!\n",
2033                         __func__, errCode);
2034                 return errCode;
2035         }
2036
2037         /* configure the device */
2038         em28xx_config_i2c(dev);
2039
2040         /* set default norm */
2041         dev->norm = em28xx_video_template.current_norm;
2042
2043         maxw = norm_maxw(dev);
2044         maxh = norm_maxh(dev);
2045
2046         /* set default image size */
2047         dev->width = maxw;
2048         dev->height = maxh;
2049         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2050         dev->hscale = 0;
2051         dev->vscale = 0;
2052         dev->ctl_input = 2;
2053
2054         errCode = em28xx_config(dev);
2055         if (errCode < 0) {
2056                 em28xx_errdev("%s: em28xx_config - errCode [%d]!\n",
2057                         __func__, errCode);
2058                 return errCode;
2059         }
2060
2061         /* init video dma queues */
2062         INIT_LIST_HEAD(&dev->vidq.active);
2063         INIT_LIST_HEAD(&dev->vidq.queued);
2064
2065
2066         if (dev->has_msp34xx) {
2067                 /* Send a reset to other chips via gpio */
2068                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2069                 if (errCode < 0) {
2070                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(1) failed! errCode [%d]\n",
2071                                 __func__, errCode);
2072                         return errCode;
2073                 }
2074                 msleep(3);
2075
2076                 errCode = em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2077                 if (errCode < 0) {
2078                         em28xx_errdev("%s: em28xx_write_regs_req - msp34xx(2) failed! errCode [%d]\n",
2079                                 __func__, errCode);
2080                         return errCode;
2081                 }
2082                 msleep(3);
2083         }
2084
2085         video_mux(dev, 0);
2086
2087         mutex_lock(&em28xx_devlist_mutex);
2088         list_add_tail(&dev->devlist, &em28xx_devlist);
2089         retval = register_analog_devices(dev);
2090         if (retval < 0) {
2091                 em28xx_release_resources(dev);
2092                 mutex_unlock(&em28xx_devlist_mutex);
2093                 goto fail_reg_devices;
2094         }
2095
2096         mutex_lock(&em28xx_extension_devlist_lock);
2097         if (!list_empty(&em28xx_extension_devlist)) {
2098                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2099                         if (ops->id)
2100                                 ops->init(dev);
2101                 }
2102         }
2103         mutex_unlock(&em28xx_extension_devlist_lock);
2104         mutex_unlock(&em28xx_devlist_mutex);
2105
2106         return 0;
2107
2108 fail_reg_devices:
2109         mutex_unlock(&dev->lock);
2110         return retval;
2111 }
2112
2113 #if defined(CONFIG_MODULES) && defined(MODULE)
2114 static void request_module_async(struct work_struct *work)
2115 {
2116         struct em28xx *dev = container_of(work,
2117                              struct em28xx, request_module_wk);
2118
2119         if (dev->has_audio_class)
2120                 request_module("snd-usb-audio");
2121         else
2122                 request_module("em28xx-alsa");
2123
2124         if (dev->has_dvb)
2125                 request_module("em28xx-dvb");
2126 }
2127
2128 static void request_modules(struct em28xx *dev)
2129 {
2130         INIT_WORK(&dev->request_module_wk, request_module_async);
2131         schedule_work(&dev->request_module_wk);
2132 }
2133 #else
2134 #define request_modules(dev)
2135 #endif /* CONFIG_MODULES */
2136
2137 /*
2138  * em28xx_usb_probe()
2139  * checks for supported devices
2140  */
2141 static int em28xx_usb_probe(struct usb_interface *interface,
2142                             const struct usb_device_id *id)
2143 {
2144         const struct usb_endpoint_descriptor *endpoint;
2145         struct usb_device *udev;
2146         struct usb_interface *uif;
2147         struct em28xx *dev = NULL;
2148         int retval = -ENODEV;
2149         int i, nr, ifnum;
2150
2151         udev = usb_get_dev(interface_to_usbdev(interface));
2152         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2153
2154         /* Check to see next free device and mark as used */
2155         nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2156         em28xx_devused |= 1<<nr;
2157
2158         /* Don't register audio interfaces */
2159         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2160                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2161                                 udev->descriptor.idVendor,
2162                                 udev->descriptor.idProduct,
2163                                 ifnum,
2164                                 interface->altsetting[0].desc.bInterfaceClass);
2165
2166                 em28xx_devused &= ~(1<<nr);
2167                 return -ENODEV;
2168         }
2169
2170         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2171                         udev->descriptor.idVendor,
2172                         udev->descriptor.idProduct,
2173                         ifnum,
2174                         interface->altsetting[0].desc.bInterfaceClass);
2175
2176         endpoint = &interface->cur_altsetting->endpoint[1].desc;
2177
2178         /* check if the device has the iso in endpoint at the correct place */
2179         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2180             USB_ENDPOINT_XFER_ISOC) {
2181                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2182                 em28xx_devused &= ~(1<<nr);
2183                 return -ENODEV;
2184         }
2185         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2186                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2187                 em28xx_devused &= ~(1<<nr);
2188                 return -ENODEV;
2189         }
2190
2191         if (nr >= EM28XX_MAXBOARDS) {
2192                 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2193                                 EM28XX_MAXBOARDS);
2194                 em28xx_devused &= ~(1<<nr);
2195                 return -ENOMEM;
2196         }
2197
2198         /* allocate memory for our device state and initialize it */
2199         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2200         if (dev == NULL) {
2201                 em28xx_err(DRIVER_NAME ": out of memory!\n");
2202                 em28xx_devused &= ~(1<<nr);
2203                 return -ENOMEM;
2204         }
2205
2206         snprintf(dev->name, 29, "em28xx #%d", nr);
2207         dev->devno = nr;
2208         dev->model = id->driver_info;
2209         dev->alt   = -1;
2210
2211         /* Checks if audio is provided by some interface */
2212         for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2213                 uif = udev->config->interface[i];
2214                 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2215                         dev->has_audio_class = 1;
2216                         break;
2217                 }
2218         }
2219
2220         printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2221                    dev->has_audio_class ? "Has" : "Doesn't have");
2222
2223         /* compute alternate max packet sizes */
2224         uif = udev->actconfig->interface[0];
2225
2226         dev->num_alt = uif->num_altsetting;
2227         em28xx_info("Alternate settings: %i\n", dev->num_alt);
2228 /*      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2229         dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2230
2231         if (dev->alt_max_pkt_size == NULL) {
2232                 em28xx_errdev("out of memory!\n");
2233                 em28xx_devused &= ~(1<<nr);
2234                 kfree(dev);
2235                 return -ENOMEM;
2236         }
2237
2238         for (i = 0; i < dev->num_alt ; i++) {
2239                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2240                                                         wMaxPacketSize);
2241                 dev->alt_max_pkt_size[i] =
2242                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2243                 em28xx_info("Alternate setting %i, max size= %i\n", i,
2244                                                 dev->alt_max_pkt_size[i]);
2245         }
2246
2247         if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2248                 dev->model = card[nr];
2249
2250         /* allocate device struct */
2251         retval = em28xx_init_dev(&dev, udev, nr);
2252         if (retval) {
2253                 em28xx_devused &= ~(1<<dev->devno);
2254                 kfree(dev);
2255
2256                 return retval;
2257         }
2258
2259         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2260
2261         /* save our data pointer in this interface device */
2262         usb_set_intfdata(interface, dev);
2263
2264         request_modules(dev);
2265
2266         return 0;
2267 }
2268
2269 /*
2270  * em28xx_usb_disconnect()
2271  * called when the device gets diconencted
2272  * video device will be unregistered on v4l2_close in case it is still open
2273  */
2274 static void em28xx_usb_disconnect(struct usb_interface *interface)
2275 {
2276         struct em28xx *dev;
2277         struct em28xx_ops *ops = NULL;
2278
2279         dev = usb_get_intfdata(interface);
2280         usb_set_intfdata(interface, NULL);
2281
2282         if (!dev)
2283                 return;
2284
2285         em28xx_info("disconnecting %s\n", dev->vdev->name);
2286
2287         /* wait until all current v4l2 io is finished then deallocate
2288            resources */
2289         mutex_lock(&dev->lock);
2290
2291         wake_up_interruptible_all(&dev->open);
2292
2293         if (dev->users) {
2294                 em28xx_warn
2295                     ("device /dev/video%d is open! Deregistration and memory "
2296                      "deallocation are deferred on close.\n",
2297                                 dev->vdev->num);
2298
2299                 dev->state |= DEV_MISCONFIGURED;
2300                 em28xx_uninit_isoc(dev);
2301                 dev->state |= DEV_DISCONNECTED;
2302                 wake_up_interruptible(&dev->wait_frame);
2303                 wake_up_interruptible(&dev->wait_stream);
2304         } else {
2305                 dev->state |= DEV_DISCONNECTED;
2306                 em28xx_release_resources(dev);
2307         }
2308         mutex_unlock(&dev->lock);
2309
2310         mutex_lock(&em28xx_extension_devlist_lock);
2311         if (!list_empty(&em28xx_extension_devlist)) {
2312                 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2313                         ops->fini(dev);
2314                 }
2315         }
2316         mutex_unlock(&em28xx_extension_devlist_lock);
2317
2318         if (!dev->users) {
2319                 kfree(dev->alt_max_pkt_size);
2320                 kfree(dev);
2321         }
2322 }
2323
2324 static struct usb_driver em28xx_usb_driver = {
2325         .name = "em28xx",
2326         .probe = em28xx_usb_probe,
2327         .disconnect = em28xx_usb_disconnect,
2328         .id_table = em28xx_id_table,
2329 };
2330
2331 static int __init em28xx_module_init(void)
2332 {
2333         int result;
2334
2335         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2336                (EM28XX_VERSION_CODE >> 16) & 0xff,
2337                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2338 #ifdef SNAPSHOT
2339         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2340                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2341 #endif
2342
2343         /* register this driver with the USB subsystem */
2344         result = usb_register(&em28xx_usb_driver);
2345         if (result)
2346                 em28xx_err(DRIVER_NAME
2347                            " usb_register failed. Error number %d.\n", result);
2348
2349         return result;
2350 }
2351
2352 static void __exit em28xx_module_exit(void)
2353 {
2354         /* deregister this driver with the USB subsystem */
2355         usb_deregister(&em28xx_usb_driver);
2356 }
2357
2358 module_init(em28xx_module_init);
2359 module_exit(em28xx_module_exit);