ivtv-fileops.c revision 523f46d6aba9dcb0a2d0fc474ca884e93a7cf198
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. */ 44static 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->id == id->open_id) { 54 /* yes, this file descriptor did. So that's OK. */ 55 return 0; 56 } 57 if (s->id == -1 && (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->id = id->open_id; 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->id = id->open_id; 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. */ 102void ivtv_release_stream(struct ivtv_stream *s) 103{ 104 struct ivtv *itv = s->itv; 105 struct ivtv_stream *s_vbi; 106 107 s->id = -1; 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->id != -1) { 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 150static 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 171static 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 203static 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 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 272 /* New buffers might have become available before we were added to the waitqueue */ 273 if (!s->q_full.buffers) 274 schedule(); 275 finish_wait(&s->waitq, &wait); 276 if (signal_pending(current)) { 277 /* return if a signal was received */ 278 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 279 *err = -EINTR; 280 return NULL; 281 } 282 } 283} 284 285static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv) 286{ 287 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 288 289 itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx]; 290 itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx]; 291 itv->vbi.sliced_mpeg_buf.readpos = 0; 292} 293 294static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf, 295 char __user *ubuf, size_t ucount) 296{ 297 struct ivtv *itv = s->itv; 298 size_t len = buf->bytesused - buf->readpos; 299 300 if (len > ucount) len = ucount; 301 if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG && 302 !ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) { 303 const char *start = buf->buf + buf->readpos; 304 const char *p = start + 1; 305 const u8 *q; 306 u8 ch = itv->search_pack_header ? 0xba : 0xe0; 307 int stuffing, i; 308 309 while (start + len > p && (q = memchr(p, 0, start + len - p))) { 310 p = q + 1; 311 if ((char *)q + 15 >= buf->buf + buf->bytesused || 312 q[1] != 0 || q[2] != 1 || q[3] != ch) { 313 continue; 314 } 315 if (!itv->search_pack_header) { 316 if ((q[6] & 0xc0) != 0x80) 317 continue; 318 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) || 319 ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) { 320 ch = 0xba; 321 itv->search_pack_header = 1; 322 p = q + 9; 323 } 324 continue; 325 } 326 stuffing = q[13] & 7; 327 /* all stuffing bytes must be 0xff */ 328 for (i = 0; i < stuffing; i++) 329 if (q[14 + i] != 0xff) 330 break; 331 if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 && 332 q[14 + stuffing] == 0 && q[15 + stuffing] == 0 && 333 q[16 + stuffing] == 1) { 334 itv->search_pack_header = 0; 335 len = (char *)q - start; 336 ivtv_setup_sliced_vbi_buf(itv); 337 break; 338 } 339 } 340 } 341 if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { 342 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name); 343 return -EFAULT; 344 } 345 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount, 346 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len, 347 buf == &itv->vbi.sliced_mpeg_buf); */ 348 buf->readpos += len; 349 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf) 350 itv->mpg_data_received += len; 351 return len; 352} 353 354static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block) 355{ 356 struct ivtv *itv = s->itv; 357 size_t tot_written = 0; 358 int single_frame = 0; 359 360 if (atomic_read(&itv->capturing) == 0 && s->id == -1) { 361 /* shouldn't happen */ 362 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name); 363 return -EIO; 364 } 365 366 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should 367 arrive one-by-one, so make sure we never output more than one VBI frame at a time */ 368 if (s->type == IVTV_DEC_STREAM_TYPE_VBI || 369 (s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv))) 370 single_frame = 1; 371 372 for (;;) { 373 struct ivtv_buffer *buf; 374 int rc; 375 376 buf = ivtv_get_buffer(s, non_block, &rc); 377 /* if there is no data available... */ 378 if (buf == NULL) { 379 /* if we got data, then return that regardless */ 380 if (tot_written) 381 break; 382 /* EOS condition */ 383 if (rc == 0) { 384 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 385 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 386 ivtv_release_stream(s); 387 } 388 /* set errno */ 389 return rc; 390 } 391 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); 392 if (buf != &itv->vbi.sliced_mpeg_buf) { 393 ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); 394 } 395 else if (buf->readpos == buf->bytesused) { 396 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 397 itv->vbi.sliced_mpeg_size[idx] = 0; 398 itv->vbi.inserted_frame++; 399 itv->vbi_data_inserted += buf->bytesused; 400 } 401 if (rc < 0) 402 return rc; 403 tot_written += rc; 404 405 if (tot_written == tot_count || single_frame) 406 break; 407 } 408 return tot_written; 409} 410 411static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count, 412 loff_t *pos, int non_block) 413{ 414 ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0; 415 struct ivtv *itv = s->itv; 416 417 IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); 418 if (rc > 0) 419 pos += rc; 420 return rc; 421} 422 423int ivtv_start_capture(struct ivtv_open_id *id) 424{ 425 struct ivtv *itv = id->itv; 426 struct ivtv_stream *s = &itv->streams[id->type]; 427 struct ivtv_stream *s_vbi; 428 429 if (s->type == IVTV_ENC_STREAM_TYPE_RAD || 430 s->type == IVTV_DEC_STREAM_TYPE_MPG || 431 s->type == IVTV_DEC_STREAM_TYPE_YUV || 432 s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 433 /* you cannot read from these stream types. */ 434 return -EPERM; 435 } 436 437 /* Try to claim this stream. */ 438 if (ivtv_claim_stream(id, s->type)) 439 return -EBUSY; 440 441 /* This stream does not need to start capturing */ 442 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { 443 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 444 return 0; 445 } 446 447 /* If capture is already in progress, then we also have to 448 do nothing extra. */ 449 if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 450 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 451 return 0; 452 } 453 454 /* Start VBI capture if required */ 455 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 456 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 457 test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 458 !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 459 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed 460 automatically when the MPG stream is claimed. 461 We only need to start the VBI capturing. */ 462 if (ivtv_start_v4l2_encode_stream(s_vbi)) { 463 IVTV_DEBUG_WARN("VBI capture start failed\n"); 464 465 /* Failure, clean up and return an error */ 466 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 467 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 468 /* also releases the associated VBI stream */ 469 ivtv_release_stream(s); 470 return -EIO; 471 } 472 IVTV_DEBUG_INFO("VBI insertion started\n"); 473 } 474 475 /* Tell the card to start capturing */ 476 if (!ivtv_start_v4l2_encode_stream(s)) { 477 /* We're done */ 478 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 479 /* Resume a possibly paused encoder */ 480 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags)) 481 ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1); 482 return 0; 483 } 484 485 /* failure, clean up */ 486 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); 487 488 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released 489 automatically when the MPG stream is released. 490 We only need to stop the VBI capturing. */ 491 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 492 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 493 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 494 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 495 } 496 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 497 ivtv_release_stream(s); 498 return -EIO; 499} 500 501ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos) 502{ 503 struct ivtv_open_id *id = fh2id(filp->private_data); 504 struct ivtv *itv = id->itv; 505 struct ivtv_stream *s = &itv->streams[id->type]; 506 int rc; 507 508 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); 509 510 mutex_lock(&itv->serialize_lock); 511 rc = ivtv_start_capture(id); 512 mutex_unlock(&itv->serialize_lock); 513 if (rc) 514 return rc; 515 return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); 516} 517 518int ivtv_start_decoding(struct ivtv_open_id *id, int speed) 519{ 520 struct ivtv *itv = id->itv; 521 struct ivtv_stream *s = &itv->streams[id->type]; 522 int rc; 523 524 if (atomic_read(&itv->decoding) == 0) { 525 if (ivtv_claim_stream(id, s->type)) { 526 /* someone else is using this stream already */ 527 IVTV_DEBUG_WARN("start decode, stream already claimed\n"); 528 return -EBUSY; 529 } 530 rc = ivtv_start_v4l2_decode_stream(s, 0); 531 if (rc < 0) { 532 if (rc == -EAGAIN) 533 rc = ivtv_start_v4l2_decode_stream(s, 0); 534 if (rc < 0) 535 return rc; 536 } 537 } 538 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 539 return ivtv_set_speed(itv, speed); 540 return 0; 541} 542 543ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 544{ 545 struct ivtv_open_id *id = fh2id(filp->private_data); 546 struct ivtv *itv = id->itv; 547 struct ivtv_stream *s = &itv->streams[id->type]; 548 struct yuv_playback_info *yi = &itv->yuv_info; 549 struct ivtv_buffer *buf; 550 struct ivtv_queue q; 551 int bytes_written = 0; 552 int mode; 553 int rc; 554 DEFINE_WAIT(wait); 555 556 IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name); 557 558 if (s->type != IVTV_DEC_STREAM_TYPE_MPG && 559 s->type != IVTV_DEC_STREAM_TYPE_YUV && 560 s->type != IVTV_DEC_STREAM_TYPE_VOUT) 561 /* not decoder streams */ 562 return -EPERM; 563 564 /* Try to claim this stream */ 565 if (ivtv_claim_stream(id, s->type)) 566 return -EBUSY; 567 568 /* This stream does not need to start any decoding */ 569 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 570 int elems = count / sizeof(struct v4l2_sliced_vbi_data); 571 572 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 573 return ivtv_write_vbi_from_user(itv, 574 (const struct v4l2_sliced_vbi_data __user *)user_buf, elems); 575 } 576 577 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; 578 579 if (ivtv_set_output_mode(itv, mode) != mode) { 580 ivtv_release_stream(s); 581 return -EBUSY; 582 } 583 ivtv_queue_init(&q); 584 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 585 586 /* Start decoder (returns 0 if already started) */ 587 mutex_lock(&itv->serialize_lock); 588 rc = ivtv_start_decoding(id, itv->speed); 589 mutex_unlock(&itv->serialize_lock); 590 if (rc) { 591 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); 592 593 /* failure, clean up */ 594 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 595 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 596 return rc; 597 } 598 599retry: 600 /* If possible, just DMA the entire frame - Check the data transfer size 601 since we may get here before the stream has been fully set-up */ 602 if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { 603 while (count >= itv->dma_data_req_size) { 604 rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf); 605 606 if (rc < 0) 607 return rc; 608 609 bytes_written += itv->dma_data_req_size; 610 user_buf += itv->dma_data_req_size; 611 count -= itv->dma_data_req_size; 612 } 613 if (count == 0) { 614 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 615 return bytes_written; 616 } 617 } 618 619 for (;;) { 620 /* Gather buffers */ 621 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) 622 ivtv_enqueue(s, buf, &q); 623 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { 624 ivtv_enqueue(s, buf, &q); 625 } 626 if (q.buffers) 627 break; 628 if (filp->f_flags & O_NONBLOCK) 629 return -EAGAIN; 630 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 631 /* New buffers might have become free before we were added to the waitqueue */ 632 if (!s->q_free.buffers) 633 schedule(); 634 finish_wait(&s->waitq, &wait); 635 if (signal_pending(current)) { 636 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 637 return -EINTR; 638 } 639 } 640 641 /* copy user data into buffers */ 642 while ((buf = ivtv_dequeue(s, &q))) { 643 /* yuv is a pain. Don't copy more data than needed for a single 644 frame, otherwise we lose sync with the incoming stream */ 645 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 646 yi->stream_size + count > itv->dma_data_req_size) 647 rc = ivtv_buf_copy_from_user(s, buf, user_buf, 648 itv->dma_data_req_size - yi->stream_size); 649 else 650 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); 651 652 /* Make sure we really got all the user data */ 653 if (rc < 0) { 654 ivtv_queue_move(s, &q, NULL, &s->q_free, 0); 655 return rc; 656 } 657 user_buf += rc; 658 count -= rc; 659 bytes_written += rc; 660 661 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 662 yi->stream_size += rc; 663 /* If we have a complete yuv frame, break loop now */ 664 if (yi->stream_size == itv->dma_data_req_size) { 665 ivtv_enqueue(s, buf, &s->q_full); 666 yi->stream_size = 0; 667 break; 668 } 669 } 670 671 if (buf->bytesused != s->buf_size) { 672 /* incomplete, leave in q_io for next time */ 673 ivtv_enqueue(s, buf, &s->q_io); 674 break; 675 } 676 /* Byteswap MPEG buffer */ 677 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 678 ivtv_buf_swap(buf); 679 ivtv_enqueue(s, buf, &s->q_full); 680 } 681 682 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { 683 if (s->q_full.length >= itv->dma_data_req_size) { 684 int got_sig; 685 686 if (mode == OUT_YUV) 687 ivtv_yuv_setup_stream_frame(itv); 688 689 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); 690 while (!(got_sig = signal_pending(current)) && 691 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { 692 schedule(); 693 } 694 finish_wait(&itv->dma_waitq, &wait); 695 if (got_sig) { 696 IVTV_DEBUG_INFO("User interrupted %s\n", s->name); 697 return -EINTR; 698 } 699 700 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); 701 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); 702 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); 703 } 704 } 705 /* more user data is available, wait until buffers become free 706 to transfer the rest. */ 707 if (count && !(filp->f_flags & O_NONBLOCK)) 708 goto retry; 709 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 710 return bytes_written; 711} 712 713unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) 714{ 715 struct ivtv_open_id *id = fh2id(filp->private_data); 716 struct ivtv *itv = id->itv; 717 struct ivtv_stream *s = &itv->streams[id->type]; 718 int res = 0; 719 720 /* add stream's waitq to the poll list */ 721 IVTV_DEBUG_HI_FILE("Decoder poll\n"); 722 723 /* If there are subscribed events, then only use the new event 724 API instead of the old video.h based API. */ 725 if (!list_empty(&id->fh.subscribed)) { 726 poll_wait(filp, &id->fh.wait, wait); 727 /* Turn off the old-style vsync events */ 728 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 729 if (v4l2_event_pending(&id->fh)) 730 res = POLLPRI; 731 } else { 732 /* This is the old-style API which is here only for backwards 733 compatibility. */ 734 poll_wait(filp, &s->waitq, wait); 735 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 736 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || 737 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) 738 res = POLLPRI; 739 } 740 741 /* Allow write if buffers are available for writing */ 742 if (s->q_free.buffers) 743 res |= POLLOUT | POLLWRNORM; 744 return res; 745} 746 747unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait) 748{ 749 struct ivtv_open_id *id = fh2id(filp->private_data); 750 struct ivtv *itv = id->itv; 751 struct ivtv_stream *s = &itv->streams[id->type]; 752 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 753 unsigned res = 0; 754 755 /* Start a capture if there is none */ 756 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 757 int rc; 758 759 mutex_lock(&itv->serialize_lock); 760 rc = ivtv_start_capture(id); 761 mutex_unlock(&itv->serialize_lock); 762 if (rc) { 763 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", 764 s->name, rc); 765 return POLLERR; 766 } 767 IVTV_DEBUG_FILE("Encoder poll started capture\n"); 768 } 769 770 /* add stream's waitq to the poll list */ 771 IVTV_DEBUG_HI_FILE("Encoder poll\n"); 772 poll_wait(filp, &s->waitq, wait); 773 if (v4l2_event_pending(&id->fh)) 774 res |= POLLPRI; 775 else 776 poll_wait(filp, &id->fh.wait, wait); 777 778 if (s->q_full.length || s->q_io.length) 779 return res | POLLIN | POLLRDNORM; 780 if (eof) 781 return res | POLLHUP; 782 return res; 783} 784 785void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) 786{ 787 struct ivtv *itv = id->itv; 788 struct ivtv_stream *s = &itv->streams[id->type]; 789 790 IVTV_DEBUG_FILE("close() of %s\n", s->name); 791 792 /* 'Unclaim' this stream */ 793 794 /* Stop capturing */ 795 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 796 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 797 798 IVTV_DEBUG_INFO("close stopping capture\n"); 799 /* Special case: a running VBI capture for VBI insertion 800 in the mpeg stream. Need to stop that too. */ 801 if (id->type == IVTV_ENC_STREAM_TYPE_MPG && 802 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && 803 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 804 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); 805 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 806 } 807 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || 808 id->type == IVTV_ENC_STREAM_TYPE_VBI) && 809 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 810 /* Also used internally, don't stop capturing */ 811 s->id = -1; 812 } 813 else { 814 ivtv_stop_v4l2_encode_stream(s, gop_end); 815 } 816 } 817 if (!gop_end) { 818 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 819 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 820 ivtv_release_stream(s); 821 } 822} 823 824static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) 825{ 826 struct ivtv *itv = id->itv; 827 struct ivtv_stream *s = &itv->streams[id->type]; 828 829 IVTV_DEBUG_FILE("close() of %s\n", s->name); 830 831 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && 832 test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { 833 /* Restore registers we've changed & clean up any mess */ 834 ivtv_yuv_close(itv); 835 } 836 837 /* Stop decoding */ 838 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 839 IVTV_DEBUG_INFO("close stopping decode\n"); 840 841 ivtv_stop_v4l2_decode_stream(s, flags, pts); 842 itv->output_mode = OUT_NONE; 843 } 844 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 845 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 846 847 if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames) 848 itv->output_mode = OUT_NONE; 849 850 itv->speed = 0; 851 clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags); 852 ivtv_release_stream(s); 853} 854 855int ivtv_v4l2_close(struct file *filp) 856{ 857 struct v4l2_fh *fh = filp->private_data; 858 struct ivtv_open_id *id = fh2id(fh); 859 struct ivtv *itv = id->itv; 860 struct ivtv_stream *s = &itv->streams[id->type]; 861 862 IVTV_DEBUG_FILE("close %s\n", s->name); 863 864 v4l2_fh_del(fh); 865 v4l2_fh_exit(fh); 866 867 /* Easy case first: this stream was never claimed by us */ 868 if (s->id != id->open_id) { 869 kfree(id); 870 return 0; 871 } 872 873 /* 'Unclaim' this stream */ 874 875 /* Stop radio */ 876 mutex_lock(&itv->serialize_lock); 877 if (id->type == IVTV_ENC_STREAM_TYPE_RAD) { 878 /* Closing radio device, return to TV mode */ 879 ivtv_mute(itv); 880 /* Mark that the radio is no longer in use */ 881 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 882 /* Switch tuner to TV */ 883 ivtv_call_all(itv, core, s_std, itv->std); 884 /* Select correct audio input (i.e. TV tuner or Line in) */ 885 ivtv_audio_set_io(itv); 886 if (itv->hw_flags & IVTV_HW_SAA711X) { 887 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 888 SAA7115_FREQ_32_11_MHZ, 0); 889 } 890 if (atomic_read(&itv->capturing) > 0) { 891 /* Undo video mute */ 892 ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, 893 v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) | 894 (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8)); 895 } 896 /* Done! Unmute and continue. */ 897 ivtv_unmute(itv); 898 ivtv_release_stream(s); 899 } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { 900 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; 901 902 ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0); 903 904 /* If all output streams are closed, and if the user doesn't have 905 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */ 906 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { 907 /* disable CC on TV-out */ 908 ivtv_disable_cc(itv); 909 } 910 } else { 911 ivtv_stop_capture(id, 0); 912 } 913 kfree(id); 914 mutex_unlock(&itv->serialize_lock); 915 return 0; 916} 917 918static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp) 919{ 920#ifdef CONFIG_VIDEO_ADV_DEBUG 921 struct video_device *vdev = video_devdata(filp); 922#endif 923 struct ivtv *itv = s->itv; 924 struct ivtv_open_id *item; 925 int res = 0; 926 927 IVTV_DEBUG_FILE("open %s\n", s->name); 928 929#ifdef CONFIG_VIDEO_ADV_DEBUG 930 /* Unless ivtv_fw_debug is set, error out if firmware dead. */ 931 if (ivtv_fw_debug) { 932 IVTV_WARN("Opening %s with dead firmware lockout disabled\n", 933 video_device_node_name(vdev)); 934 IVTV_WARN("Selected firmware errors will be ignored\n"); 935 } else { 936#else 937 if (1) { 938#endif 939 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 940 if (res == -EAGAIN) 941 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 942 if (res < 0) 943 return -EIO; 944 } 945 946 if (s->type == IVTV_DEC_STREAM_TYPE_MPG && 947 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) 948 return -EBUSY; 949 950 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 951 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) 952 return -EBUSY; 953 954 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 955 if (read_reg(0x82c) == 0) { 956 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); 957 /* return -ENODEV; */ 958 } 959 ivtv_udma_alloc(itv); 960 } 961 962 /* Allocate memory */ 963 item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); 964 if (NULL == item) { 965 IVTV_DEBUG_WARN("nomem on v4l2 open\n"); 966 return -ENOMEM; 967 } 968 v4l2_fh_init(&item->fh, s->vdev); 969 if (s->type == IVTV_DEC_STREAM_TYPE_YUV || 970 s->type == IVTV_DEC_STREAM_TYPE_MPG) { 971 res = v4l2_event_alloc(&item->fh, 60); 972 } 973 if (res < 0) { 974 v4l2_fh_exit(&item->fh); 975 kfree(item); 976 return res; 977 } 978 item->itv = itv; 979 item->type = s->type; 980 981 item->open_id = itv->open_id++; 982 filp->private_data = &item->fh; 983 984 if (item->type == IVTV_ENC_STREAM_TYPE_RAD) { 985 /* Try to claim this stream */ 986 if (ivtv_claim_stream(item, item->type)) { 987 /* No, it's already in use */ 988 v4l2_fh_exit(&item->fh); 989 kfree(item); 990 return -EBUSY; 991 } 992 993 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { 994 if (atomic_read(&itv->capturing) > 0) { 995 /* switching to radio while capture is 996 in progress is not polite */ 997 ivtv_release_stream(s); 998 v4l2_fh_exit(&item->fh); 999 kfree(item); 1000 return -EBUSY; 1001 } 1002 } 1003 /* Mark that the radio is being used. */ 1004 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 1005 /* We have the radio */ 1006 ivtv_mute(itv); 1007 /* Switch tuner to radio */ 1008 ivtv_call_all(itv, tuner, s_radio); 1009 /* Select the correct audio input (i.e. radio tuner) */ 1010 ivtv_audio_set_io(itv); 1011 if (itv->hw_flags & IVTV_HW_SAA711X) { 1012 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 1013 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL); 1014 } 1015 /* Done! Unmute and continue. */ 1016 ivtv_unmute(itv); 1017 } 1018 1019 /* YUV or MPG Decoding Mode? */ 1020 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) { 1021 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1022 } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 1023 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1024 /* For yuv, we need to know the dma size before we start */ 1025 itv->dma_data_req_size = 1026 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); 1027 itv->yuv_info.stream_size = 0; 1028 } 1029 v4l2_fh_add(&item->fh); 1030 return 0; 1031} 1032 1033int ivtv_v4l2_open(struct file *filp) 1034{ 1035 int res; 1036 struct ivtv *itv = NULL; 1037 struct ivtv_stream *s = NULL; 1038 struct video_device *vdev = video_devdata(filp); 1039 1040 s = video_get_drvdata(vdev); 1041 itv = s->itv; 1042 1043 mutex_lock(&itv->serialize_lock); 1044 if (ivtv_init_on_first_open(itv)) { 1045 IVTV_ERR("Failed to initialize on device %s\n", 1046 video_device_node_name(vdev)); 1047 mutex_unlock(&itv->serialize_lock); 1048 return -ENXIO; 1049 } 1050 res = ivtv_serialized_open(s, filp); 1051 mutex_unlock(&itv->serialize_lock); 1052 return res; 1053} 1054 1055void 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 1062void 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} 1071