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 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 EXPORT_SYMBOL(ivtv_claim_stream); 100 101 /* This function releases a previously claimed stream. It will take into 102 account associated VBI streams. */ 103 void ivtv_release_stream(struct ivtv_stream *s) 104 { 105 struct ivtv *itv = s->itv; 106 struct ivtv_stream *s_vbi; 107 108 s->fh = NULL; 109 if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) && 110 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 111 /* this stream is still in use internally */ 112 return; 113 } 114 if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { 115 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name); 116 return; 117 } 118 119 ivtv_flush_queues(s); 120 121 /* disable reinsertion interrupt */ 122 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) 123 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 124 125 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI, 126 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI, 127 for all other streams we're done */ 128 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 129 s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; 130 else if (s->type == IVTV_ENC_STREAM_TYPE_MPG) 131 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 132 else 133 return; 134 135 /* clear internal use flag */ 136 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) { 137 /* was already cleared */ 138 return; 139 } 140 if (s_vbi->fh) { 141 /* VBI stream still claimed by a file descriptor */ 142 return; 143 } 144 /* disable reinsertion interrupt */ 145 if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI) 146 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 147 clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags); 148 ivtv_flush_queues(s_vbi); 149 } 150 EXPORT_SYMBOL(ivtv_release_stream); 151 152 static void ivtv_dualwatch(struct ivtv *itv) 153 { 154 struct v4l2_tuner vt; 155 u32 new_stereo_mode; 156 const u32 dual = 0x02; 157 158 new_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode); 159 memset(&vt, 0, sizeof(vt)); 160 ivtv_call_all(itv, tuner, g_tuner, &vt); 161 if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) 162 new_stereo_mode = dual; 163 164 if (new_stereo_mode == itv->dualwatch_stereo_mode) 165 return; 166 167 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n", 168 itv->dualwatch_stereo_mode, new_stereo_mode); 169 if (v4l2_ctrl_s_ctrl(itv->cxhdl.audio_mode, new_stereo_mode)) 170 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); 171 } 172 173 static void ivtv_update_pgm_info(struct ivtv *itv) 174 { 175 u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24; 176 int cnt; 177 int i = 0; 178 179 if (wr_idx >= itv->pgm_info_num) { 180 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num); 181 return; 182 } 183 cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num; 184 while (i < cnt) { 185 int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 186 struct v4l2_enc_idx_entry *e = itv->pgm_info + idx; 187 u32 addr = itv->pgm_info_offset + 4 + idx * 24; 188 const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1, 189 V4L2_ENC_IDX_FRAME_B, -1, -1, -1 }; 190 // 1=I, 2=P, 4=B 191 192 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32); 193 if (e->offset > itv->mpg_data_received) { 194 break; 195 } 196 e->offset += itv->vbi_data_inserted; 197 e->length = read_enc(addr); 198 e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32); 199 e->flags = mapping[read_enc(addr + 12) & 7]; 200 i++; 201 } 202 itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 203 } 204 205 static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err) 206 { 207 struct ivtv *itv = s->itv; 208 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 209 struct ivtv_buffer *buf; 210 DEFINE_WAIT(wait); 211 212 *err = 0; 213 while (1) { 214 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) { 215 /* Process pending program info updates and pending VBI data */ 216 ivtv_update_pgm_info(itv); 217 218 if (time_after(jiffies, 219 itv->dualwatch_jiffies + 220 msecs_to_jiffies(1000))) { 221 itv->dualwatch_jiffies = jiffies; 222 ivtv_dualwatch(itv); 223 } 224 225 if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 226 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 227 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) { 228 /* byteswap and process VBI data */ 229 ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type); 230 ivtv_enqueue(s_vbi, buf, &s_vbi->q_free); 231 } 232 } 233 buf = &itv->vbi.sliced_mpeg_buf; 234 if (buf->readpos != buf->bytesused) { 235 return buf; 236 } 237 } 238 239 /* do we have leftover data? */ 240 buf = ivtv_dequeue(s, &s->q_io); 241 if (buf) 242 return buf; 243 244 /* do we have new data? */ 245 buf = ivtv_dequeue(s, &s->q_full); 246 if (buf) { 247 if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0) 248 return buf; 249 buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP; 250 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) 251 /* byteswap MPG data */ 252 ivtv_buf_swap(buf); 253 else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) { 254 /* byteswap and process VBI data */ 255 ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type); 256 } 257 return buf; 258 } 259 260 /* return if end of stream */ 261 if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 262 IVTV_DEBUG_INFO("EOS %s\n", s->name); 263 return NULL; 264 } 265 266 /* return if file was opened with O_NONBLOCK */ 267 if (non_block) { 268 *err = -EAGAIN; 269 return NULL; 270 } 271 272 /* wait for more data to arrive */ 273 mutex_unlock(&itv->serialize_lock); 274 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 275 /* New buffers might have become available before we were added to the waitqueue */ 276 if (!s->q_full.buffers) 277 schedule(); 278 finish_wait(&s->waitq, &wait); 279 mutex_lock(&itv->serialize_lock); 280 if (signal_pending(current)) { 281 /* return if a signal was received */ 282 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 283 *err = -EINTR; 284 return NULL; 285 } 286 } 287 } 288 289 static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv) 290 { 291 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 292 293 itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx]; 294 itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx]; 295 itv->vbi.sliced_mpeg_buf.readpos = 0; 296 } 297 298 static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf, 299 char __user *ubuf, size_t ucount) 300 { 301 struct ivtv *itv = s->itv; 302 size_t len = buf->bytesused - buf->readpos; 303 304 if (len > ucount) len = ucount; 305 if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG && 306 !ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) { 307 const char *start = buf->buf + buf->readpos; 308 const char *p = start + 1; 309 const u8 *q; 310 u8 ch = itv->search_pack_header ? 0xba : 0xe0; 311 int stuffing, i; 312 313 while (start + len > p && (q = memchr(p, 0, start + len - p))) { 314 p = q + 1; 315 if ((char *)q + 15 >= buf->buf + buf->bytesused || 316 q[1] != 0 || q[2] != 1 || q[3] != ch) { 317 continue; 318 } 319 if (!itv->search_pack_header) { 320 if ((q[6] & 0xc0) != 0x80) 321 continue; 322 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) || 323 ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) { 324 ch = 0xba; 325 itv->search_pack_header = 1; 326 p = q + 9; 327 } 328 continue; 329 } 330 stuffing = q[13] & 7; 331 /* all stuffing bytes must be 0xff */ 332 for (i = 0; i < stuffing; i++) 333 if (q[14 + i] != 0xff) 334 break; 335 if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 && 336 q[14 + stuffing] == 0 && q[15 + stuffing] == 0 && 337 q[16 + stuffing] == 1) { 338 itv->search_pack_header = 0; 339 len = (char *)q - start; 340 ivtv_setup_sliced_vbi_buf(itv); 341 break; 342 } 343 } 344 } 345 if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { 346 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name); 347 return -EFAULT; 348 } 349 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount, 350 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len, 351 buf == &itv->vbi.sliced_mpeg_buf); */ 352 buf->readpos += len; 353 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf) 354 itv->mpg_data_received += len; 355 return len; 356 } 357 358 static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block) 359 { 360 struct ivtv *itv = s->itv; 361 size_t tot_written = 0; 362 int single_frame = 0; 363 364 if (atomic_read(&itv->capturing) == 0 && s->fh == NULL) { 365 /* shouldn't happen */ 366 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name); 367 return -EIO; 368 } 369 370 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should 371 arrive one-by-one, so make sure we never output more than one VBI frame at a time */ 372 if (s->type == IVTV_DEC_STREAM_TYPE_VBI || 373 (s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv))) 374 single_frame = 1; 375 376 for (;;) { 377 struct ivtv_buffer *buf; 378 int rc; 379 380 buf = ivtv_get_buffer(s, non_block, &rc); 381 /* if there is no data available... */ 382 if (buf == NULL) { 383 /* if we got data, then return that regardless */ 384 if (tot_written) 385 break; 386 /* EOS condition */ 387 if (rc == 0) { 388 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 389 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 390 ivtv_release_stream(s); 391 } 392 /* set errno */ 393 return rc; 394 } 395 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); 396 if (buf != &itv->vbi.sliced_mpeg_buf) { 397 ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); 398 } 399 else if (buf->readpos == buf->bytesused) { 400 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 401 itv->vbi.sliced_mpeg_size[idx] = 0; 402 itv->vbi.inserted_frame++; 403 itv->vbi_data_inserted += buf->bytesused; 404 } 405 if (rc < 0) 406 return rc; 407 tot_written += rc; 408 409 if (tot_written == tot_count || single_frame) 410 break; 411 } 412 return tot_written; 413 } 414 415 static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count, 416 loff_t *pos, int non_block) 417 { 418 ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0; 419 struct ivtv *itv = s->itv; 420 421 IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); 422 if (rc > 0) 423 pos += rc; 424 return rc; 425 } 426 427 int ivtv_start_capture(struct ivtv_open_id *id) 428 { 429 struct ivtv *itv = id->itv; 430 struct ivtv_stream *s = &itv->streams[id->type]; 431 struct ivtv_stream *s_vbi; 432 433 if (s->type == IVTV_ENC_STREAM_TYPE_RAD || 434 s->type == IVTV_DEC_STREAM_TYPE_MPG || 435 s->type == IVTV_DEC_STREAM_TYPE_YUV || 436 s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 437 /* you cannot read from these stream types. */ 438 return -EINVAL; 439 } 440 441 /* Try to claim this stream. */ 442 if (ivtv_claim_stream(id, s->type)) 443 return -EBUSY; 444 445 /* This stream does not need to start capturing */ 446 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { 447 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 448 return 0; 449 } 450 451 /* If capture is already in progress, then we also have to 452 do nothing extra. */ 453 if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 454 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 455 return 0; 456 } 457 458 /* Start VBI capture if required */ 459 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 460 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 461 test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 462 !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 463 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed 464 automatically when the MPG stream is claimed. 465 We only need to start the VBI capturing. */ 466 if (ivtv_start_v4l2_encode_stream(s_vbi)) { 467 IVTV_DEBUG_WARN("VBI capture start failed\n"); 468 469 /* Failure, clean up and return an error */ 470 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 471 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 472 /* also releases the associated VBI stream */ 473 ivtv_release_stream(s); 474 return -EIO; 475 } 476 IVTV_DEBUG_INFO("VBI insertion started\n"); 477 } 478 479 /* Tell the card to start capturing */ 480 if (!ivtv_start_v4l2_encode_stream(s)) { 481 /* We're done */ 482 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 483 /* Resume a possibly paused encoder */ 484 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags)) 485 ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1); 486 return 0; 487 } 488 489 /* failure, clean up */ 490 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); 491 492 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released 493 automatically when the MPG stream is released. 494 We only need to stop the VBI capturing. */ 495 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 496 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 497 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 498 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 499 } 500 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 501 ivtv_release_stream(s); 502 return -EIO; 503 } 504 505 ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos) 506 { 507 struct ivtv_open_id *id = fh2id(filp->private_data); 508 struct ivtv *itv = id->itv; 509 struct ivtv_stream *s = &itv->streams[id->type]; 510 ssize_t rc; 511 512 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); 513 514 if (mutex_lock_interruptible(&itv->serialize_lock)) 515 return -ERESTARTSYS; 516 rc = ivtv_start_capture(id); 517 if (!rc) 518 rc = ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); 519 mutex_unlock(&itv->serialize_lock); 520 return rc; 521 } 522 523 int ivtv_start_decoding(struct ivtv_open_id *id, int speed) 524 { 525 struct ivtv *itv = id->itv; 526 struct ivtv_stream *s = &itv->streams[id->type]; 527 int rc; 528 529 if (atomic_read(&itv->decoding) == 0) { 530 if (ivtv_claim_stream(id, s->type)) { 531 /* someone else is using this stream already */ 532 IVTV_DEBUG_WARN("start decode, stream already claimed\n"); 533 return -EBUSY; 534 } 535 rc = ivtv_start_v4l2_decode_stream(s, 0); 536 if (rc < 0) { 537 if (rc == -EAGAIN) 538 rc = ivtv_start_v4l2_decode_stream(s, 0); 539 if (rc < 0) 540 return rc; 541 } 542 } 543 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 544 return ivtv_set_speed(itv, speed); 545 return 0; 546 } 547 548 static ssize_t ivtv_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 549 { 550 struct ivtv_open_id *id = fh2id(filp->private_data); 551 struct ivtv *itv = id->itv; 552 struct ivtv_stream *s = &itv->streams[id->type]; 553 struct yuv_playback_info *yi = &itv->yuv_info; 554 struct ivtv_buffer *buf; 555 struct ivtv_queue q; 556 int bytes_written = 0; 557 int mode; 558 int rc; 559 DEFINE_WAIT(wait); 560 561 IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name); 562 563 if (s->type != IVTV_DEC_STREAM_TYPE_MPG && 564 s->type != IVTV_DEC_STREAM_TYPE_YUV && 565 s->type != IVTV_DEC_STREAM_TYPE_VOUT) 566 /* not decoder streams */ 567 return -EINVAL; 568 569 /* Try to claim this stream */ 570 if (ivtv_claim_stream(id, s->type)) 571 return -EBUSY; 572 573 /* This stream does not need to start any decoding */ 574 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 575 int elems = count / sizeof(struct v4l2_sliced_vbi_data); 576 577 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 578 return ivtv_write_vbi_from_user(itv, 579 (const struct v4l2_sliced_vbi_data __user *)user_buf, elems); 580 } 581 582 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; 583 584 if (ivtv_set_output_mode(itv, mode) != mode) { 585 ivtv_release_stream(s); 586 return -EBUSY; 587 } 588 ivtv_queue_init(&q); 589 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 590 591 /* Start decoder (returns 0 if already started) */ 592 rc = ivtv_start_decoding(id, itv->speed); 593 if (rc) { 594 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); 595 596 /* failure, clean up */ 597 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 598 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 599 return rc; 600 } 601 602 retry: 603 /* If possible, just DMA the entire frame - Check the data transfer size 604 since we may get here before the stream has been fully set-up */ 605 if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { 606 while (count >= itv->dma_data_req_size) { 607 rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf); 608 609 if (rc < 0) 610 return rc; 611 612 bytes_written += itv->dma_data_req_size; 613 user_buf += itv->dma_data_req_size; 614 count -= itv->dma_data_req_size; 615 } 616 if (count == 0) { 617 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 618 return bytes_written; 619 } 620 } 621 622 for (;;) { 623 /* Gather buffers */ 624 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) 625 ivtv_enqueue(s, buf, &q); 626 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { 627 ivtv_enqueue(s, buf, &q); 628 } 629 if (q.buffers) 630 break; 631 if (filp->f_flags & O_NONBLOCK) 632 return -EAGAIN; 633 mutex_unlock(&itv->serialize_lock); 634 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 635 /* New buffers might have become free before we were added to the waitqueue */ 636 if (!s->q_free.buffers) 637 schedule(); 638 finish_wait(&s->waitq, &wait); 639 mutex_lock(&itv->serialize_lock); 640 if (signal_pending(current)) { 641 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 642 return -EINTR; 643 } 644 } 645 646 /* copy user data into buffers */ 647 while ((buf = ivtv_dequeue(s, &q))) { 648 /* yuv is a pain. Don't copy more data than needed for a single 649 frame, otherwise we lose sync with the incoming stream */ 650 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 651 yi->stream_size + count > itv->dma_data_req_size) 652 rc = ivtv_buf_copy_from_user(s, buf, user_buf, 653 itv->dma_data_req_size - yi->stream_size); 654 else 655 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); 656 657 /* Make sure we really got all the user data */ 658 if (rc < 0) { 659 ivtv_queue_move(s, &q, NULL, &s->q_free, 0); 660 return rc; 661 } 662 user_buf += rc; 663 count -= rc; 664 bytes_written += rc; 665 666 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 667 yi->stream_size += rc; 668 /* If we have a complete yuv frame, break loop now */ 669 if (yi->stream_size == itv->dma_data_req_size) { 670 ivtv_enqueue(s, buf, &s->q_full); 671 yi->stream_size = 0; 672 break; 673 } 674 } 675 676 if (buf->bytesused != s->buf_size) { 677 /* incomplete, leave in q_io for next time */ 678 ivtv_enqueue(s, buf, &s->q_io); 679 break; 680 } 681 /* Byteswap MPEG buffer */ 682 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 683 ivtv_buf_swap(buf); 684 ivtv_enqueue(s, buf, &s->q_full); 685 } 686 687 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { 688 if (s->q_full.length >= itv->dma_data_req_size) { 689 int got_sig; 690 691 if (mode == OUT_YUV) 692 ivtv_yuv_setup_stream_frame(itv); 693 694 mutex_unlock(&itv->serialize_lock); 695 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); 696 while (!(got_sig = signal_pending(current)) && 697 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { 698 schedule(); 699 } 700 finish_wait(&itv->dma_waitq, &wait); 701 mutex_lock(&itv->serialize_lock); 702 if (got_sig) { 703 IVTV_DEBUG_INFO("User interrupted %s\n", s->name); 704 return -EINTR; 705 } 706 707 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); 708 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); 709 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); 710 } 711 } 712 /* more user data is available, wait until buffers become free 713 to transfer the rest. */ 714 if (count && !(filp->f_flags & O_NONBLOCK)) 715 goto retry; 716 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 717 return bytes_written; 718 } 719 720 ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 721 { 722 struct ivtv_open_id *id = fh2id(filp->private_data); 723 struct ivtv *itv = id->itv; 724 ssize_t res; 725 726 if (mutex_lock_interruptible(&itv->serialize_lock)) 727 return -ERESTARTSYS; 728 res = ivtv_write(filp, user_buf, count, pos); 729 mutex_unlock(&itv->serialize_lock); 730 return res; 731 } 732 733 unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) 734 { 735 struct ivtv_open_id *id = fh2id(filp->private_data); 736 struct ivtv *itv = id->itv; 737 struct ivtv_stream *s = &itv->streams[id->type]; 738 int res = 0; 739 740 /* add stream's waitq to the poll list */ 741 IVTV_DEBUG_HI_FILE("Decoder poll\n"); 742 743 /* If there are subscribed events, then only use the new event 744 API instead of the old video.h based API. */ 745 if (!list_empty(&id->fh.subscribed)) { 746 poll_wait(filp, &id->fh.wait, wait); 747 /* Turn off the old-style vsync events */ 748 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 749 if (v4l2_event_pending(&id->fh)) 750 res = POLLPRI; 751 } else { 752 /* This is the old-style API which is here only for backwards 753 compatibility. */ 754 poll_wait(filp, &s->waitq, wait); 755 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 756 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || 757 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) 758 res = POLLPRI; 759 } 760 761 /* Allow write if buffers are available for writing */ 762 if (s->q_free.buffers) 763 res |= POLLOUT | POLLWRNORM; 764 return res; 765 } 766 767 unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait) 768 { 769 unsigned long req_events = poll_requested_events(wait); 770 struct ivtv_open_id *id = fh2id(filp->private_data); 771 struct ivtv *itv = id->itv; 772 struct ivtv_stream *s = &itv->streams[id->type]; 773 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 774 unsigned res = 0; 775 776 /* Start a capture if there is none */ 777 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags) && 778 s->type != IVTV_ENC_STREAM_TYPE_RAD && 779 (req_events & (POLLIN | POLLRDNORM))) { 780 int rc; 781 782 mutex_lock(&itv->serialize_lock); 783 rc = ivtv_start_capture(id); 784 mutex_unlock(&itv->serialize_lock); 785 if (rc) { 786 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", 787 s->name, rc); 788 return POLLERR; 789 } 790 IVTV_DEBUG_FILE("Encoder poll started capture\n"); 791 } 792 793 /* add stream's waitq to the poll list */ 794 IVTV_DEBUG_HI_FILE("Encoder poll\n"); 795 poll_wait(filp, &s->waitq, wait); 796 if (v4l2_event_pending(&id->fh)) 797 res |= POLLPRI; 798 else 799 poll_wait(filp, &id->fh.wait, wait); 800 801 if (s->q_full.length || s->q_io.length) 802 return res | POLLIN | POLLRDNORM; 803 if (eof) 804 return res | POLLHUP; 805 return res; 806 } 807 808 void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) 809 { 810 struct ivtv *itv = id->itv; 811 struct ivtv_stream *s = &itv->streams[id->type]; 812 813 IVTV_DEBUG_FILE("close() of %s\n", s->name); 814 815 /* 'Unclaim' this stream */ 816 817 /* Stop capturing */ 818 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 819 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 820 821 IVTV_DEBUG_INFO("close stopping capture\n"); 822 /* Special case: a running VBI capture for VBI insertion 823 in the mpeg stream. Need to stop that too. */ 824 if (id->type == IVTV_ENC_STREAM_TYPE_MPG && 825 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && 826 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 827 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); 828 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 829 } 830 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || 831 id->type == IVTV_ENC_STREAM_TYPE_VBI) && 832 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 833 /* Also used internally, don't stop capturing */ 834 s->fh = NULL; 835 } 836 else { 837 ivtv_stop_v4l2_encode_stream(s, gop_end); 838 } 839 } 840 if (!gop_end) { 841 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 842 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 843 ivtv_release_stream(s); 844 } 845 } 846 847 static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) 848 { 849 struct ivtv *itv = id->itv; 850 struct ivtv_stream *s = &itv->streams[id->type]; 851 852 IVTV_DEBUG_FILE("close() of %s\n", s->name); 853 854 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && 855 test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { 856 /* Restore registers we've changed & clean up any mess */ 857 ivtv_yuv_close(itv); 858 } 859 860 /* Stop decoding */ 861 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 862 IVTV_DEBUG_INFO("close stopping decode\n"); 863 864 ivtv_stop_v4l2_decode_stream(s, flags, pts); 865 itv->output_mode = OUT_NONE; 866 } 867 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 868 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 869 870 if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames) 871 itv->output_mode = OUT_NONE; 872 873 itv->speed = 0; 874 clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags); 875 ivtv_release_stream(s); 876 } 877 878 int ivtv_v4l2_close(struct file *filp) 879 { 880 struct v4l2_fh *fh = filp->private_data; 881 struct ivtv_open_id *id = fh2id(fh); 882 struct ivtv *itv = id->itv; 883 struct ivtv_stream *s = &itv->streams[id->type]; 884 885 IVTV_DEBUG_FILE("close %s\n", s->name); 886 887 mutex_lock(&itv->serialize_lock); 888 889 /* Stop radio */ 890 if (id->type == IVTV_ENC_STREAM_TYPE_RAD && 891 v4l2_fh_is_singular_file(filp)) { 892 /* Closing radio device, return to TV mode */ 893 ivtv_mute(itv); 894 /* Mark that the radio is no longer in use */ 895 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 896 /* Switch tuner to TV */ 897 ivtv_call_all(itv, video, s_std, itv->std); 898 /* Select correct audio input (i.e. TV tuner or Line in) */ 899 ivtv_audio_set_io(itv); 900 if (itv->hw_flags & IVTV_HW_SAA711X) { 901 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 902 SAA7115_FREQ_32_11_MHZ, 0); 903 } 904 if (atomic_read(&itv->capturing) > 0) { 905 /* Undo video mute */ 906 ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, 907 v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) | 908 (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8)); 909 } 910 /* Done! Unmute and continue. */ 911 ivtv_unmute(itv); 912 } 913 914 v4l2_fh_del(fh); 915 v4l2_fh_exit(fh); 916 917 /* Easy case first: this stream was never claimed by us */ 918 if (s->fh != &id->fh) 919 goto close_done; 920 921 /* 'Unclaim' this stream */ 922 923 if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { 924 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; 925 926 ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0); 927 928 /* If all output streams are closed, and if the user doesn't have 929 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */ 930 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { 931 /* disable CC on TV-out */ 932 ivtv_disable_cc(itv); 933 } 934 } else { 935 ivtv_stop_capture(id, 0); 936 } 937 close_done: 938 kfree(id); 939 mutex_unlock(&itv->serialize_lock); 940 return 0; 941 } 942 943 static int ivtv_open(struct file *filp) 944 { 945 struct video_device *vdev = video_devdata(filp); 946 struct ivtv_stream *s = video_get_drvdata(vdev); 947 struct ivtv *itv = s->itv; 948 struct ivtv_open_id *item; 949 int res = 0; 950 951 IVTV_DEBUG_FILE("open %s\n", s->name); 952 953 if (ivtv_init_on_first_open(itv)) { 954 IVTV_ERR("Failed to initialize on device %s\n", 955 video_device_node_name(vdev)); 956 return -ENXIO; 957 } 958 959 #ifdef CONFIG_VIDEO_ADV_DEBUG 960 /* Unless ivtv_fw_debug is set, error out if firmware dead. */ 961 if (ivtv_fw_debug) { 962 IVTV_WARN("Opening %s with dead firmware lockout disabled\n", 963 video_device_node_name(vdev)); 964 IVTV_WARN("Selected firmware errors will be ignored\n"); 965 } else { 966 #else 967 if (1) { 968 #endif 969 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 970 if (res == -EAGAIN) 971 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 972 if (res < 0) 973 return -EIO; 974 } 975 976 if (s->type == IVTV_DEC_STREAM_TYPE_MPG && 977 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) 978 return -EBUSY; 979 980 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 981 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) 982 return -EBUSY; 983 984 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 985 if (read_reg(0x82c) == 0) { 986 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); 987 /* return -ENODEV; */ 988 } 989 ivtv_udma_alloc(itv); 990 } 991 992 /* Allocate memory */ 993 item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); 994 if (NULL == item) { 995 IVTV_DEBUG_WARN("nomem on v4l2 open\n"); 996 return -ENOMEM; 997 } 998 v4l2_fh_init(&item->fh, s->vdev); 999 item->itv = itv; 1000 item->type = s->type; 1001 1002 filp->private_data = &item->fh; 1003 v4l2_fh_add(&item->fh); 1004 1005 if (item->type == IVTV_ENC_STREAM_TYPE_RAD && 1006 v4l2_fh_is_singular_file(filp)) { 1007 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { 1008 if (atomic_read(&itv->capturing) > 0) { 1009 /* switching to radio while capture is 1010 in progress is not polite */ 1011 v4l2_fh_del(&item->fh); 1012 v4l2_fh_exit(&item->fh); 1013 kfree(item); 1014 return -EBUSY; 1015 } 1016 } 1017 /* Mark that the radio is being used. */ 1018 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 1019 /* We have the radio */ 1020 ivtv_mute(itv); 1021 /* Switch tuner to radio */ 1022 ivtv_call_all(itv, tuner, s_radio); 1023 /* Select the correct audio input (i.e. radio tuner) */ 1024 ivtv_audio_set_io(itv); 1025 if (itv->hw_flags & IVTV_HW_SAA711X) { 1026 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 1027 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL); 1028 } 1029 /* Done! Unmute and continue. */ 1030 ivtv_unmute(itv); 1031 } 1032 1033 /* YUV or MPG Decoding Mode? */ 1034 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) { 1035 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1036 } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 1037 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1038 /* For yuv, we need to know the dma size before we start */ 1039 itv->dma_data_req_size = 1040 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); 1041 itv->yuv_info.stream_size = 0; 1042 } 1043 return 0; 1044 } 1045 1046 int ivtv_v4l2_open(struct file *filp) 1047 { 1048 struct video_device *vdev = video_devdata(filp); 1049 int res; 1050 1051 if (mutex_lock_interruptible(vdev->lock)) 1052 return -ERESTARTSYS; 1053 res = ivtv_open(filp); 1054 mutex_unlock(vdev->lock); 1055 return res; 1056 } 1057 1058 void ivtv_mute(struct ivtv *itv) 1059 { 1060 if (atomic_read(&itv->capturing)) 1061 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); 1062 IVTV_DEBUG_INFO("Mute\n"); 1063 } 1064 1065 void ivtv_unmute(struct ivtv *itv) 1066 { 1067 if (atomic_read(&itv->capturing)) { 1068 ivtv_msleep_timeout(100, 0); 1069 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); 1070 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); 1071 } 1072 IVTV_DEBUG_INFO("Unmute\n"); 1073 } 1074