Pileus Git - ~andy/linux/blob - drivers/media/pci/ivtv/ivtv-fileops.c

   1 /*
   2     file operation functions
   3     Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
   4     Copyright (C) 2004  Chris Kennedy <c@groovy.org>
   5     Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "ivtv-driver.h"
  23 #include "ivtv-fileops.h"
  24 #include "ivtv-i2c.h"
  25 #include "ivtv-queue.h"
  26 #include "ivtv-udma.h"
  27 #include "ivtv-irq.h"
  28 #include "ivtv-vbi.h"
  29 #include "ivtv-mailbox.h"
  30 #include "ivtv-routing.h"
  31 #include "ivtv-streams.h"
  32 #include "ivtv-yuv.h"
  33 #include "ivtv-ioctl.h"
  34 #include "ivtv-cards.h"
  35 #include "ivtv-firmware.h"
  36 #include <media/v4l2-event.h>
  37 #include <media/saa7115.h>
  38
  39 /* This function tries to claim the stream for a specific file descriptor.
  40    If no one else is using this stream then the stream is claimed and
  41    associated VBI streams are also automatically claimed.
  42    Possible error returns: -EBUSY if someone else has claimed
  43    the stream or 0 on success. */
  44 static int ivtv_claim_stream(struct ivtv_open_id *id, int type)
  45 {
  46         struct ivtv *itv = id->itv;
  47         struct ivtv_stream *s = &itv->streams[type];
  48         struct ivtv_stream *s_vbi;
  49         int vbi_type;
  50
  51         if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) {
  52                 /* someone already claimed this stream */
  53                 if (s->fh == &id->fh) {
  54                         /* yes, this file descriptor did. So that's OK. */
  55                         return 0;
  56                 }
  57                 if (s->fh == NULL && (type == IVTV_DEC_STREAM_TYPE_VBI ||
  58                                          type == IVTV_ENC_STREAM_TYPE_VBI)) {
  59                         /* VBI is handled already internally, now also assign
  60                            the file descriptor to this stream for external
  61                            reading of the stream. */
  62                         s->fh = &id->fh;
  63                         IVTV_DEBUG_INFO("Start Read VBI\n");
  64                         return 0;
  65                 }
  66                 /* someone else is using this stream already */
  67                 IVTV_DEBUG_INFO("Stream %d is busy\n", type);
  68                 return -EBUSY;
  69         }
  70         s->fh = &id->fh;
  71         if (type == IVTV_DEC_STREAM_TYPE_VBI) {
  72                 /* Enable reinsertion interrupt */
  73                 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
  74         }
  75
  76         /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI,
  77            IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI
  78            (provided VBI insertion is on and sliced VBI is selected), for all
  79            other streams we're done */
  80         if (type == IVTV_DEC_STREAM_TYPE_MPG) {
  81                 vbi_type = IVTV_DEC_STREAM_TYPE_VBI;
  82         } else if (type == IVTV_ENC_STREAM_TYPE_MPG &&
  83                    itv->vbi.insert_mpeg && !ivtv_raw_vbi(itv)) {
  84                 vbi_type = IVTV_ENC_STREAM_TYPE_VBI;
  85         } else {
  86                 return 0;
  87         }
  88         s_vbi = &itv->streams[vbi_type];
  89
  90         if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) {
  91                 /* Enable reinsertion interrupt */
  92                 if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI)
  93                         ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
  94         }
  95         /* mark that it is used internally */
  96         set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags);
  97         return 0;
  98 }
  99
 100 /* This function releases a previously claimed stream. It will take into
 101    account associated VBI streams. */
 102 void ivtv_release_stream(struct ivtv_stream *s)
 103 {
 104         struct ivtv *itv = s->itv;
 105         struct ivtv_stream *s_vbi;
 106
 107         s->fh = NULL;
 108         if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) &&
 109                 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
 110                 /* this stream is still in use internally */
 111                 return;
 112         }
 113         if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) {
 114                 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name);
 115                 return;
 116         }
 117
 118         ivtv_flush_queues(s);
 119
 120         /* disable reinsertion interrupt */
 121         if (s->type == IVTV_DEC_STREAM_TYPE_VBI)
 122                 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
 123
 124         /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI,
 125            IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI,
 126            for all other streams we're done */
 127         if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
 128                 s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI];
 129         else if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
 130                 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
 131         else
 132                 return;
 133
 134         /* clear internal use flag */
 135         if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) {
 136                 /* was already cleared */
 137                 return;
 138         }
 139         if (s_vbi->fh) {
 140                 /* VBI stream still claimed by a file descriptor */
 141                 return;
 142         }
 143         /* disable reinsertion interrupt */
 144         if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI)
 145                 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT);
 146         clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags);
 147         ivtv_flush_queues(s_vbi);
 148 }
 149
 150 static void ivtv_dualwatch(struct ivtv *itv)
 151 {
 152         struct v4l2_tuner vt;
 153         u32 new_stereo_mode;
 154         const u32 dual = 0x02;
 155
 156         new_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode);
 157         memset(&vt, 0, sizeof(vt));
 158         ivtv_call_all(itv, tuner, g_tuner, &vt);
 159         if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2))
 160                 new_stereo_mode = dual;
 161
 162         if (new_stereo_mode == itv->dualwatch_stereo_mode)
 163                 return;
 164
 165         IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n",
 166                            itv->dualwatch_stereo_mode, new_stereo_mode);
 167         if (v4l2_ctrl_s_ctrl(itv->cxhdl.audio_mode, new_stereo_mode))
 168                 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
 169 }
 170
 171 static void ivtv_update_pgm_info(struct ivtv *itv)
 172 {
 173         u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24;
 174         int cnt;
 175         int i = 0;
 176
 177         if (wr_idx >= itv->pgm_info_num) {
 178                 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num);
 179                 return;
 180         }
 181         cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num;
 182         while (i < cnt) {
 183                 int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
 184                 struct v4l2_enc_idx_entry *e = itv->pgm_info + idx;
 185                 u32 addr = itv->pgm_info_offset + 4 + idx * 24;
 186                 const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1,
 187                         V4L2_ENC_IDX_FRAME_B, -1, -1, -1 };
 188                                         // 1=I, 2=P, 4=B
 189
 190                 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32);
 191                 if (e->offset > itv->mpg_data_received) {
 192                         break;
 193                 }
 194                 e->offset += itv->vbi_data_inserted;
 195                 e->length = read_enc(addr);
 196                 e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32);
 197                 e->flags = mapping[read_enc(addr + 12) & 7];
 198                 i++;
 199         }
 200         itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num;
 201 }
 202
 203 static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err)
 204 {
 205         struct ivtv *itv = s->itv;
 206         struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
 207         struct ivtv_buffer *buf;
 208         DEFINE_WAIT(wait);
 209
 210         *err = 0;
 211         while (1) {
 212                 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) {
 213                         /* Process pending program info updates and pending VBI data */
 214                         ivtv_update_pgm_info(itv);
 215
 216                         if (time_after(jiffies,
 217                                        itv->dualwatch_jiffies +
 218                                        msecs_to_jiffies(1000))) {
 219                                 itv->dualwatch_jiffies = jiffies;
 220                                 ivtv_dualwatch(itv);
 221                         }
 222
 223                         if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
 224                             !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
 225                                 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) {
 226                                         /* byteswap and process VBI data */
 227                                         ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type);
 228                                         ivtv_enqueue(s_vbi, buf, &s_vbi->q_free);
 229                                 }
 230                         }
 231                         buf = &itv->vbi.sliced_mpeg_buf;
 232                         if (buf->readpos != buf->bytesused) {
 233                                 return buf;
 234                         }
 235                 }
 236
 237                 /* do we have leftover data? */
 238                 buf = ivtv_dequeue(s, &s->q_io);
 239                 if (buf)
 240                         return buf;
 241
 242                 /* do we have new data? */
 243                 buf = ivtv_dequeue(s, &s->q_full);
 244                 if (buf) {
 245                         if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0)
 246                                 return buf;
 247                         buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP;
 248                         if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
 249                                 /* byteswap MPG data */
 250                                 ivtv_buf_swap(buf);
 251                         else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) {
 252                                 /* byteswap and process VBI data */
 253                                 ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type);
 254                         }
 255                         return buf;
 256                 }
 257
 258                 /* return if end of stream */
 259                 if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
 260                         IVTV_DEBUG_INFO("EOS %s\n", s->name);
 261                         return NULL;
 262                 }
 263
 264                 /* return if file was opened with O_NONBLOCK */
 265                 if (non_block) {
 266                         *err = -EAGAIN;
 267                         return NULL;
 268                 }
 269
 270                 /* wait for more data to arrive */
 271                 mutex_unlock(&itv->serialize_lock);
 272                 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
 273                 /* New buffers might have become available before we were added to the waitqueue */
 274                 if (!s->q_full.buffers)
 275                         schedule();
 276                 finish_wait(&s->waitq, &wait);
 277                 mutex_lock(&itv->serialize_lock);
 278                 if (signal_pending(current)) {
 279                         /* return if a signal was received */
 280                         IVTV_DEBUG_INFO("User stopped %s\n", s->name);
 281                         *err = -EINTR;
 282                         return NULL;
 283                 }
 284         }
 285 }
 286
 287 static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv)
 288 {
 289         int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
 290
 291         itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx];
 292         itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx];
 293         itv->vbi.sliced_mpeg_buf.readpos = 0;
 294 }
 295
 296 static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf,
 297                 char __user *ubuf, size_t ucount)
 298 {
 299         struct ivtv *itv = s->itv;
 300         size_t len = buf->bytesused - buf->readpos;
 301
 302         if (len > ucount) len = ucount;
 303         if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG &&
 304             !ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) {
 305                 const char *start = buf->buf + buf->readpos;
 306                 const char *p = start + 1;
 307                 const u8 *q;
 308                 u8 ch = itv->search_pack_header ? 0xba : 0xe0;
 309                 int stuffing, i;
 310
 311                 while (start + len > p && (q = memchr(p, 0, start + len - p))) {
 312                         p = q + 1;
 313                         if ((char *)q + 15 >= buf->buf + buf->bytesused ||
 314                             q[1] != 0 || q[2] != 1 || q[3] != ch) {
 315                                 continue;
 316                         }
 317                         if (!itv->search_pack_header) {
 318                                 if ((q[6] & 0xc0) != 0x80)
 319                                         continue;
 320                                 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) ||
 321                                     ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) {
 322                                         ch = 0xba;
 323                                         itv->search_pack_header = 1;
 324                                         p = q + 9;
 325                                 }
 326                                 continue;
 327                         }
 328                         stuffing = q[13] & 7;
 329                         /* all stuffing bytes must be 0xff */
 330                         for (i = 0; i < stuffing; i++)
 331                                 if (q[14 + i] != 0xff)
 332                                         break;
 333                         if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 &&
 334                                         q[14 + stuffing] == 0 && q[15 + stuffing] == 0 &&
 335                                         q[16 + stuffing] == 1) {
 336                                 itv->search_pack_header = 0;
 337                                 len = (char *)q - start;
 338                                 ivtv_setup_sliced_vbi_buf(itv);
 339                                 break;
 340                         }
 341                 }
 342         }
 343         if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) {
 344                 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name);
 345                 return -EFAULT;
 346         }
 347         /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount,
 348                         buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len,
 349                         buf == &itv->vbi.sliced_mpeg_buf); */
 350         buf->readpos += len;
 351         if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf)
 352                 itv->mpg_data_received += len;
 353         return len;
 354 }
 355
 356 static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block)
 357 {
 358         struct ivtv *itv = s->itv;
 359         size_t tot_written = 0;
 360         int single_frame = 0;
 361
 362         if (atomic_read(&itv->capturing) == 0 && s->fh == NULL) {
 363                 /* shouldn't happen */
 364                 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name);
 365                 return -EIO;
 366         }
 367
 368         /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should
 369            arrive one-by-one, so make sure we never output more than one VBI frame at a time */
 370         if (s->type == IVTV_DEC_STREAM_TYPE_VBI ||
 371             (s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv)))
 372                 single_frame = 1;
 373
 374         for (;;) {
 375                 struct ivtv_buffer *buf;
 376                 int rc;
 377
 378                 buf = ivtv_get_buffer(s, non_block, &rc);
 379                 /* if there is no data available... */
 380                 if (buf == NULL) {
 381                         /* if we got data, then return that regardless */
 382                         if (tot_written)
 383                                 break;
 384                         /* EOS condition */
 385                         if (rc == 0) {
 386                                 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
 387                                 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 388                                 ivtv_release_stream(s);
 389                         }
 390                         /* set errno */
 391                         return rc;
 392                 }
 393                 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written);
 394                 if (buf != &itv->vbi.sliced_mpeg_buf) {
 395                         ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io);
 396                 }
 397                 else if (buf->readpos == buf->bytesused) {
 398                         int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES;
 399                         itv->vbi.sliced_mpeg_size[idx] = 0;
 400                         itv->vbi.inserted_frame++;
 401                         itv->vbi_data_inserted += buf->bytesused;
 402                 }
 403                 if (rc < 0)
 404                         return rc;
 405                 tot_written += rc;
 406
 407                 if (tot_written == tot_count || single_frame)
 408                         break;
 409         }
 410         return tot_written;
 411 }
 412
 413 static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count,
 414                         loff_t *pos, int non_block)
 415 {
 416         ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0;
 417         struct ivtv *itv = s->itv;
 418
 419         IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
 420         if (rc > 0)
 421                 pos += rc;
 422         return rc;
 423 }
 424
 425 int ivtv_start_capture(struct ivtv_open_id *id)
 426 {
 427         struct ivtv *itv = id->itv;
 428         struct ivtv_stream *s = &itv->streams[id->type];
 429         struct ivtv_stream *s_vbi;
 430
 431         if (s->type == IVTV_ENC_STREAM_TYPE_RAD ||
 432             s->type == IVTV_DEC_STREAM_TYPE_MPG ||
 433             s->type == IVTV_DEC_STREAM_TYPE_YUV ||
 434             s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
 435                 /* you cannot read from these stream types. */
 436                 return -EPERM;
 437         }
 438
 439         /* Try to claim this stream. */
 440         if (ivtv_claim_stream(id, s->type))
 441                 return -EBUSY;
 442
 443         /* This stream does not need to start capturing */
 444         if (s->type == IVTV_DEC_STREAM_TYPE_VBI) {
 445                 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 446                 return 0;
 447         }
 448
 449         /* If capture is already in progress, then we also have to
 450            do nothing extra. */
 451         if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
 452                 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 453                 return 0;
 454         }
 455
 456         /* Start VBI capture if required */
 457         s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
 458         if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
 459             test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
 460             !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
 461                 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed
 462                    automatically when the MPG stream is claimed.
 463                    We only need to start the VBI capturing. */
 464                 if (ivtv_start_v4l2_encode_stream(s_vbi)) {
 465                         IVTV_DEBUG_WARN("VBI capture start failed\n");
 466
 467                         /* Failure, clean up and return an error */
 468                         clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
 469                         clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
 470                         /* also releases the associated VBI stream */
 471                         ivtv_release_stream(s);
 472                         return -EIO;
 473                 }
 474                 IVTV_DEBUG_INFO("VBI insertion started\n");
 475         }
 476
 477         /* Tell the card to start capturing */
 478         if (!ivtv_start_v4l2_encode_stream(s)) {
 479                 /* We're done */
 480                 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 481                 /* Resume a possibly paused encoder */
 482                 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags))
 483                         ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1);
 484                 return 0;
 485         }
 486
 487         /* failure, clean up */
 488         IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
 489
 490         /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released
 491            automatically when the MPG stream is released.
 492            We only need to stop the VBI capturing. */
 493         if (s->type == IVTV_ENC_STREAM_TYPE_MPG &&
 494             test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) {
 495                 ivtv_stop_v4l2_encode_stream(s_vbi, 0);
 496                 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags);
 497         }
 498         clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
 499         ivtv_release_stream(s);
 500         return -EIO;
 501 }
 502
 503 ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos)
 504 {
 505         struct ivtv_open_id *id = fh2id(filp->private_data);
 506         struct ivtv *itv = id->itv;
 507         struct ivtv_stream *s = &itv->streams[id->type];
 508         ssize_t rc;
 509
 510         IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
 511
 512         if (mutex_lock_interruptible(&itv->serialize_lock))
 513                 return -ERESTARTSYS;
 514         rc = ivtv_start_capture(id);
 515         if (!rc)
 516                 rc = ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
 517         mutex_unlock(&itv->serialize_lock);
 518         return rc;
 519 }
 520
 521 int ivtv_start_decoding(struct ivtv_open_id *id, int speed)
 522 {
 523         struct ivtv *itv = id->itv;
 524         struct ivtv_stream *s = &itv->streams[id->type];
 525         int rc;
 526
 527         if (atomic_read(&itv->decoding) == 0) {
 528                 if (ivtv_claim_stream(id, s->type)) {
 529                         /* someone else is using this stream already */
 530                         IVTV_DEBUG_WARN("start decode, stream already claimed\n");
 531                         return -EBUSY;
 532                 }
 533                 rc = ivtv_start_v4l2_decode_stream(s, 0);
 534                 if (rc < 0) {
 535                         if (rc == -EAGAIN)
 536                                 rc = ivtv_start_v4l2_decode_stream(s, 0);
 537                         if (rc < 0)
 538                                 return rc;
 539                 }
 540         }
 541         if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
 542                 return ivtv_set_speed(itv, speed);
 543         return 0;
 544 }
 545
 546 static ssize_t ivtv_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
 547 {
 548         struct ivtv_open_id *id = fh2id(filp->private_data);
 549         struct ivtv *itv = id->itv;
 550         struct ivtv_stream *s = &itv->streams[id->type];
 551         struct yuv_playback_info *yi = &itv->yuv_info;
 552         struct ivtv_buffer *buf;
 553         struct ivtv_queue q;
 554         int bytes_written = 0;
 555         int mode;
 556         int rc;
 557         DEFINE_WAIT(wait);
 558
 559         IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name);
 560
 561         if (s->type != IVTV_DEC_STREAM_TYPE_MPG &&
 562             s->type != IVTV_DEC_STREAM_TYPE_YUV &&
 563             s->type != IVTV_DEC_STREAM_TYPE_VOUT)
 564                 /* not decoder streams */
 565                 return -EPERM;
 566
 567         /* Try to claim this stream */
 568         if (ivtv_claim_stream(id, s->type))
 569                 return -EBUSY;
 570
 571         /* This stream does not need to start any decoding */
 572         if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) {
 573                 int elems = count / sizeof(struct v4l2_sliced_vbi_data);
 574
 575                 set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 576                 return ivtv_write_vbi_from_user(itv,
 577                    (const struct v4l2_sliced_vbi_data __user *)user_buf, elems);
 578         }
 579
 580         mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV;
 581
 582         if (ivtv_set_output_mode(itv, mode) != mode) {
 583             ivtv_release_stream(s);
 584             return -EBUSY;
 585         }
 586         ivtv_queue_init(&q);
 587         set_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 588
 589         /* Start decoder (returns 0 if already started) */
 590         rc = ivtv_start_decoding(id, itv->speed);
 591         if (rc) {
 592                 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name);
 593
 594                 /* failure, clean up */
 595                 clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
 596                 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 597                 return rc;
 598         }
 599
 600 retry:
 601         /* If possible, just DMA the entire frame - Check the data transfer size
 602         since we may get here before the stream has been fully set-up */
 603         if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) {
 604                 while (count >= itv->dma_data_req_size) {
 605                         rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf);
 606
 607                         if (rc < 0)
 608                                 return rc;
 609
 610                         bytes_written += itv->dma_data_req_size;
 611                         user_buf += itv->dma_data_req_size;
 612                         count -= itv->dma_data_req_size;
 613                 }
 614                 if (count == 0) {
 615                         IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
 616                         return bytes_written;
 617                 }
 618         }
 619
 620         for (;;) {
 621                 /* Gather buffers */
 622                 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io)))
 623                         ivtv_enqueue(s, buf, &q);
 624                 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) {
 625                         ivtv_enqueue(s, buf, &q);
 626                 }
 627                 if (q.buffers)
 628                         break;
 629                 if (filp->f_flags & O_NONBLOCK)
 630                         return -EAGAIN;
 631                 mutex_unlock(&itv->serialize_lock);
 632                 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
 633                 /* New buffers might have become free before we were added to the waitqueue */
 634                 if (!s->q_free.buffers)
 635                         schedule();
 636                 finish_wait(&s->waitq, &wait);
 637                 mutex_lock(&itv->serialize_lock);
 638                 if (signal_pending(current)) {
 639                         IVTV_DEBUG_INFO("User stopped %s\n", s->name);
 640                         return -EINTR;
 641                 }
 642         }
 643
 644         /* copy user data into buffers */
 645         while ((buf = ivtv_dequeue(s, &q))) {
 646                 /* yuv is a pain. Don't copy more data than needed for a single
 647                    frame, otherwise we lose sync with the incoming stream */
 648                 if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
 649                     yi->stream_size + count > itv->dma_data_req_size)
 650                         rc  = ivtv_buf_copy_from_user(s, buf, user_buf,
 651                                 itv->dma_data_req_size - yi->stream_size);
 652                 else
 653                         rc = ivtv_buf_copy_from_user(s, buf, user_buf, count);
 654
 655                 /* Make sure we really got all the user data */
 656                 if (rc < 0) {
 657                         ivtv_queue_move(s, &q, NULL, &s->q_free, 0);
 658                         return rc;
 659                 }
 660                 user_buf += rc;
 661                 count -= rc;
 662                 bytes_written += rc;
 663
 664                 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
 665                         yi->stream_size += rc;
 666                         /* If we have a complete yuv frame, break loop now */
 667                         if (yi->stream_size == itv->dma_data_req_size) {
 668                                 ivtv_enqueue(s, buf, &s->q_full);
 669                                 yi->stream_size = 0;
 670                                 break;
 671                         }
 672                 }
 673
 674                 if (buf->bytesused != s->buf_size) {
 675                         /* incomplete, leave in q_io for next time */
 676                         ivtv_enqueue(s, buf, &s->q_io);
 677                         break;
 678                 }
 679                 /* Byteswap MPEG buffer */
 680                 if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
 681                         ivtv_buf_swap(buf);
 682                 ivtv_enqueue(s, buf, &s->q_full);
 683         }
 684
 685         if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) {
 686                 if (s->q_full.length >= itv->dma_data_req_size) {
 687                         int got_sig;
 688
 689                         if (mode == OUT_YUV)
 690                                 ivtv_yuv_setup_stream_frame(itv);
 691
 692                         mutex_unlock(&itv->serialize_lock);
 693                         prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
 694                         while (!(got_sig = signal_pending(current)) &&
 695                                         test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) {
 696                                 schedule();
 697                         }
 698                         finish_wait(&itv->dma_waitq, &wait);
 699                         mutex_lock(&itv->serialize_lock);
 700                         if (got_sig) {
 701                                 IVTV_DEBUG_INFO("User interrupted %s\n", s->name);
 702                                 return -EINTR;
 703                         }
 704
 705                         clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
 706                         ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size);
 707                         ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1);
 708                 }
 709         }
 710         /* more user data is available, wait until buffers become free
 711            to transfer the rest. */
 712         if (count && !(filp->f_flags & O_NONBLOCK))
 713                 goto retry;
 714         IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
 715         return bytes_written;
 716 }
 717
 718 ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
 719 {
 720         struct ivtv_open_id *id = fh2id(filp->private_data);
 721         struct ivtv *itv = id->itv;
 722         ssize_t res;
 723
 724         if (mutex_lock_interruptible(&itv->serialize_lock))
 725                 return -ERESTARTSYS;
 726         res = ivtv_write(filp, user_buf, count, pos);
 727         mutex_unlock(&itv->serialize_lock);
 728         return res;
 729 }
 730
 731 unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
 732 {
 733         struct ivtv_open_id *id = fh2id(filp->private_data);
 734         struct ivtv *itv = id->itv;
 735         struct ivtv_stream *s = &itv->streams[id->type];
 736         int res = 0;
 737
 738         /* add stream's waitq to the poll list */
 739         IVTV_DEBUG_HI_FILE("Decoder poll\n");
 740
 741         /* If there are subscribed events, then only use the new event
 742            API instead of the old video.h based API. */
 743         if (!list_empty(&id->fh.subscribed)) {
 744                 poll_wait(filp, &id->fh.wait, wait);
 745                 /* Turn off the old-style vsync events */
 746                 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
 747                 if (v4l2_event_pending(&id->fh))
 748                         res = POLLPRI;
 749         } else {
 750                 /* This is the old-style API which is here only for backwards
 751                    compatibility. */
 752                 poll_wait(filp, &s->waitq, wait);
 753                 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
 754                 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
 755                     test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
 756                         res = POLLPRI;
 757         }
 758
 759         /* Allow write if buffers are available for writing */
 760         if (s->q_free.buffers)
 761                 res |= POLLOUT | POLLWRNORM;
 762         return res;
 763 }
 764
 765 unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait)
 766 {
 767         unsigned long req_events = poll_requested_events(wait);
 768         struct ivtv_open_id *id = fh2id(filp->private_data);
 769         struct ivtv *itv = id->itv;
 770         struct ivtv_stream *s = &itv->streams[id->type];
 771         int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
 772         unsigned res = 0;
 773
 774         /* Start a capture if there is none */
 775         if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags) &&
 776                         (req_events & (POLLIN | POLLRDNORM))) {
 777                 int rc;
 778
 779                 mutex_lock(&itv->serialize_lock);
 780                 rc = ivtv_start_capture(id);
 781                 mutex_unlock(&itv->serialize_lock);
 782                 if (rc) {
 783                         IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
 784                                         s->name, rc);
 785                         return POLLERR;
 786                 }
 787                 IVTV_DEBUG_FILE("Encoder poll started capture\n");
 788         }
 789
 790         /* add stream's waitq to the poll list */
 791         IVTV_DEBUG_HI_FILE("Encoder poll\n");
 792         poll_wait(filp, &s->waitq, wait);
 793         if (v4l2_event_pending(&id->fh))
 794                 res |= POLLPRI;
 795         else
 796                 poll_wait(filp, &id->fh.wait, wait);
 797
 798         if (s->q_full.length || s->q_io.length)
 799                 return res | POLLIN | POLLRDNORM;
 800         if (eof)
 801                 return res | POLLHUP;
 802         return res;
 803 }
 804
 805 void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end)
 806 {
 807         struct ivtv *itv = id->itv;
 808         struct ivtv_stream *s = &itv->streams[id->type];
 809
 810         IVTV_DEBUG_FILE("close() of %s\n", s->name);
 811
 812         /* 'Unclaim' this stream */
 813
 814         /* Stop capturing */
 815         if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
 816                 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
 817
 818                 IVTV_DEBUG_INFO("close stopping capture\n");
 819                 /* Special case: a running VBI capture for VBI insertion
 820                    in the mpeg stream. Need to stop that too. */
 821                 if (id->type == IVTV_ENC_STREAM_TYPE_MPG &&
 822                     test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) &&
 823                     !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) {
 824                         IVTV_DEBUG_INFO("close stopping embedded VBI capture\n");
 825                         ivtv_stop_v4l2_encode_stream(s_vbi, 0);
 826                 }
 827                 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI ||
 828                      id->type == IVTV_ENC_STREAM_TYPE_VBI) &&
 829                     test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) {
 830                         /* Also used internally, don't stop capturing */
 831                         s->fh = NULL;
 832                 }
 833                 else {
 834                         ivtv_stop_v4l2_encode_stream(s, gop_end);
 835                 }
 836         }
 837         if (!gop_end) {
 838                 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 839                 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
 840                 ivtv_release_stream(s);
 841         }
 842 }
 843
 844 static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
 845 {
 846         struct ivtv *itv = id->itv;
 847         struct ivtv_stream *s = &itv->streams[id->type];
 848
 849         IVTV_DEBUG_FILE("close() of %s\n", s->name);
 850
 851         if (id->type == IVTV_DEC_STREAM_TYPE_YUV &&
 852                 test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) {
 853                 /* Restore registers we've changed & clean up any mess */
 854                 ivtv_yuv_close(itv);
 855         }
 856
 857         /* Stop decoding */
 858         if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
 859                 IVTV_DEBUG_INFO("close stopping decode\n");
 860
 861                 ivtv_stop_v4l2_decode_stream(s, flags, pts);
 862                 itv->output_mode = OUT_NONE;
 863         }
 864         clear_bit(IVTV_F_S_APPL_IO, &s->s_flags);
 865         clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
 866
 867         if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames)
 868                 itv->output_mode = OUT_NONE;
 869
 870         itv->speed = 0;
 871         clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);
 872         ivtv_release_stream(s);
 873 }
 874
 875 int ivtv_v4l2_close(struct file *filp)
 876 {
 877         struct v4l2_fh *fh = filp->private_data;
 878         struct ivtv_open_id *id = fh2id(fh);
 879         struct ivtv *itv = id->itv;
 880         struct ivtv_stream *s = &itv->streams[id->type];
 881
 882         IVTV_DEBUG_FILE("close %s\n", s->name);
 883
 884         mutex_lock(&itv->serialize_lock);
 885
 886         /* Stop radio */
 887         if (id->type == IVTV_ENC_STREAM_TYPE_RAD &&
 888                         v4l2_fh_is_singular_file(filp)) {
 889                 /* Closing radio device, return to TV mode */
 890                 ivtv_mute(itv);
 891                 /* Mark that the radio is no longer in use */
 892                 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
 893                 /* Switch tuner to TV */
 894                 ivtv_call_all(itv, core, s_std, itv->std);
 895                 /* Select correct audio input (i.e. TV tuner or Line in) */
 896                 ivtv_audio_set_io(itv);
 897                 if (itv->hw_flags & IVTV_HW_SAA711X) {
 898                         ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
 899                                         SAA7115_FREQ_32_11_MHZ, 0);
 900                 }
 901                 if (atomic_read(&itv->capturing) > 0) {
 902                         /* Undo video mute */
 903                         ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1,
 904                                         v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) |
 905                                         (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8));
 906                 }
 907                 /* Done! Unmute and continue. */
 908                 ivtv_unmute(itv);
 909         }
 910
 911         v4l2_fh_del(fh);
 912         v4l2_fh_exit(fh);
 913
 914         /* Easy case first: this stream was never claimed by us */
 915         if (s->fh != &id->fh)
 916                 goto close_done;
 917
 918         /* 'Unclaim' this stream */
 919
 920         if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) {
 921                 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT];
 922
 923                 ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0);
 924
 925                 /* If all output streams are closed, and if the user doesn't have
 926                    IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */
 927                 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) {
 928                         /* disable CC on TV-out */
 929                         ivtv_disable_cc(itv);
 930                 }
 931         } else {
 932                 ivtv_stop_capture(id, 0);
 933         }
 934 close_done:
 935         kfree(id);
 936         mutex_unlock(&itv->serialize_lock);
 937         return 0;
 938 }
 939
 940 static int ivtv_open(struct file *filp)
 941 {
 942         struct video_device *vdev = video_devdata(filp);
 943         struct ivtv_stream *s = video_get_drvdata(vdev);
 944         struct ivtv *itv = s->itv;
 945         struct ivtv_open_id *item;
 946         int res = 0;
 947
 948         IVTV_DEBUG_FILE("open %s\n", s->name);
 949
 950         if (ivtv_init_on_first_open(itv)) {
 951                 IVTV_ERR("Failed to initialize on device %s\n",
 952                          video_device_node_name(vdev));
 953                 return -ENXIO;
 954         }
 955
 956 #ifdef CONFIG_VIDEO_ADV_DEBUG
 957         /* Unless ivtv_fw_debug is set, error out if firmware dead. */
 958         if (ivtv_fw_debug) {
 959                 IVTV_WARN("Opening %s with dead firmware lockout disabled\n",
 960                           video_device_node_name(vdev));
 961                 IVTV_WARN("Selected firmware errors will be ignored\n");
 962         } else {
 963 #else
 964         if (1) {
 965 #endif
 966                 res = ivtv_firmware_check(itv, "ivtv_serialized_open");
 967                 if (res == -EAGAIN)
 968                         res = ivtv_firmware_check(itv, "ivtv_serialized_open");
 969                 if (res < 0)
 970                         return -EIO;
 971         }
 972
 973         if (s->type == IVTV_DEC_STREAM_TYPE_MPG &&
 974                 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
 975                 return -EBUSY;
 976
 977         if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
 978                 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
 979                 return -EBUSY;
 980
 981         if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
 982                 if (read_reg(0x82c) == 0) {
 983                         IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
 984                         /* return -ENODEV; */
 985                 }
 986                 ivtv_udma_alloc(itv);
 987         }
 988
 989         /* Allocate memory */
 990         item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
 991         if (NULL == item) {
 992                 IVTV_DEBUG_WARN("nomem on v4l2 open\n");
 993                 return -ENOMEM;
 994         }
 995         v4l2_fh_init(&item->fh, s->vdev);
 996         item->itv = itv;
 997         item->type = s->type;
 998
 999         filp->private_data = &item->fh;
1000         v4l2_fh_add(&item->fh);
1001
1002         if (item->type == IVTV_ENC_STREAM_TYPE_RAD &&
1003                         v4l2_fh_is_singular_file(filp)) {
1004                 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
1005                         if (atomic_read(&itv->capturing) > 0) {
1006                                 /* switching to radio while capture is
1007                                    in progress is not polite */
1008                                 v4l2_fh_del(&item->fh);
1009                                 v4l2_fh_exit(&item->fh);
1010                                 kfree(item);
1011                                 return -EBUSY;
1012                         }
1013                 }
1014                 /* Mark that the radio is being used. */
1015                 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
1016                 /* We have the radio */
1017                 ivtv_mute(itv);
1018                 /* Switch tuner to radio */
1019                 ivtv_call_all(itv, tuner, s_radio);
1020                 /* Select the correct audio input (i.e. radio tuner) */
1021                 ivtv_audio_set_io(itv);
1022                 if (itv->hw_flags & IVTV_HW_SAA711X) {
1023                         ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
1024                                 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL);
1025                 }
1026                 /* Done! Unmute and continue. */
1027                 ivtv_unmute(itv);
1028         }
1029
1030         /* YUV or MPG Decoding Mode? */
1031         if (s->type == IVTV_DEC_STREAM_TYPE_MPG) {
1032                 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
1033         } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
1034                 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
1035                 /* For yuv, we need to know the dma size before we start */
1036                 itv->dma_data_req_size =
1037                                 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
1038                 itv->yuv_info.stream_size = 0;
1039         }
1040         return 0;
1041 }
1042
1043 int ivtv_v4l2_open(struct file *filp)
1044 {
1045         struct video_device *vdev = video_devdata(filp);
1046         int res;
1047
1048         if (mutex_lock_interruptible(vdev->lock))
1049                 return -ERESTARTSYS;
1050         res = ivtv_open(filp);
1051         mutex_unlock(vdev->lock);
1052         return res;
1053 }
1054
1055 void ivtv_mute(struct ivtv *itv)
1056 {
1057         if (atomic_read(&itv->capturing))
1058                 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1);
1059         IVTV_DEBUG_INFO("Mute\n");
1060 }
1061
1062 void ivtv_unmute(struct ivtv *itv)
1063 {
1064         if (atomic_read(&itv->capturing)) {
1065                 ivtv_msleep_timeout(100, 0);
1066                 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
1067                 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
1068         }
1069         IVTV_DEBUG_INFO("Unmute\n");
1070 }