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->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. */ 102void 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 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 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 287static 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 296static 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 356static 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 413static 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 425int 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 503ssize_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 int rc; 509 510 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); 511 512 rc = ivtv_start_capture(id); 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 rc = ivtv_start_decoding(id, itv->speed); 588 if (rc) { 589 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); 590 591 /* failure, clean up */ 592 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 593 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 594 return rc; 595 } 596 597retry: 598 /* If possible, just DMA the entire frame - Check the data transfer size 599 since we may get here before the stream has been fully set-up */ 600 if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { 601 while (count >= itv->dma_data_req_size) { 602 rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf); 603 604 if (rc < 0) 605 return rc; 606 607 bytes_written += itv->dma_data_req_size; 608 user_buf += itv->dma_data_req_size; 609 count -= itv->dma_data_req_size; 610 } 611 if (count == 0) { 612 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 613 return bytes_written; 614 } 615 } 616 617 for (;;) { 618 /* Gather buffers */ 619 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) 620 ivtv_enqueue(s, buf, &q); 621 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { 622 ivtv_enqueue(s, buf, &q); 623 } 624 if (q.buffers) 625 break; 626 if (filp->f_flags & O_NONBLOCK) 627 return -EAGAIN; 628 mutex_unlock(&itv->serialize_lock); 629 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 630 /* New buffers might have become free before we were added to the waitqueue */ 631 if (!s->q_free.buffers) 632 schedule(); 633 finish_wait(&s->waitq, &wait); 634 mutex_lock(&itv->serialize_lock); 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 mutex_unlock(&itv->serialize_lock); 690 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); 691 while (!(got_sig = signal_pending(current)) && 692 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { 693 schedule(); 694 } 695 finish_wait(&itv->dma_waitq, &wait); 696 mutex_lock(&itv->serialize_lock); 697 if (got_sig) { 698 IVTV_DEBUG_INFO("User interrupted %s\n", s->name); 699 return -EINTR; 700 } 701 702 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); 703 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); 704 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); 705 } 706 } 707 /* more user data is available, wait until buffers become free 708 to transfer the rest. */ 709 if (count && !(filp->f_flags & O_NONBLOCK)) 710 goto retry; 711 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 712 return bytes_written; 713} 714 715unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) 716{ 717 struct ivtv_open_id *id = fh2id(filp->private_data); 718 struct ivtv *itv = id->itv; 719 struct ivtv_stream *s = &itv->streams[id->type]; 720 int res = 0; 721 722 /* add stream's waitq to the poll list */ 723 IVTV_DEBUG_HI_FILE("Decoder poll\n"); 724 725 /* If there are subscribed events, then only use the new event 726 API instead of the old video.h based API. */ 727 if (!list_empty(&id->fh.subscribed)) { 728 poll_wait(filp, &id->fh.wait, wait); 729 /* Turn off the old-style vsync events */ 730 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 731 if (v4l2_event_pending(&id->fh)) 732 res = POLLPRI; 733 } else { 734 /* This is the old-style API which is here only for backwards 735 compatibility. */ 736 poll_wait(filp, &s->waitq, wait); 737 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 738 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || 739 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) 740 res = POLLPRI; 741 } 742 743 /* Allow write if buffers are available for writing */ 744 if (s->q_free.buffers) 745 res |= POLLOUT | POLLWRNORM; 746 return res; 747} 748 749unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait) 750{ 751 struct ivtv_open_id *id = fh2id(filp->private_data); 752 struct ivtv *itv = id->itv; 753 struct ivtv_stream *s = &itv->streams[id->type]; 754 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 755 unsigned res = 0; 756 757 /* Start a capture if there is none */ 758 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 759 int rc; 760 761 rc = ivtv_start_capture(id); 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->fh = NULL; 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 /* Stop radio */ 865 if (id->type == IVTV_ENC_STREAM_TYPE_RAD && 866 v4l2_fh_is_singular_file(filp)) { 867 /* Closing radio device, return to TV mode */ 868 ivtv_mute(itv); 869 /* Mark that the radio is no longer in use */ 870 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 871 /* Switch tuner to TV */ 872 ivtv_call_all(itv, core, s_std, itv->std); 873 /* Select correct audio input (i.e. TV tuner or Line in) */ 874 ivtv_audio_set_io(itv); 875 if (itv->hw_flags & IVTV_HW_SAA711X) { 876 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 877 SAA7115_FREQ_32_11_MHZ, 0); 878 } 879 if (atomic_read(&itv->capturing) > 0) { 880 /* Undo video mute */ 881 ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, 882 v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) | 883 (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8)); 884 } 885 /* Done! Unmute and continue. */ 886 ivtv_unmute(itv); 887 } 888 889 v4l2_fh_del(fh); 890 v4l2_fh_exit(fh); 891 892 /* Easy case first: this stream was never claimed by us */ 893 if (s->fh != &id->fh) { 894 kfree(id); 895 return 0; 896 } 897 898 /* 'Unclaim' this stream */ 899 900 if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { 901 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; 902 903 ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0); 904 905 /* If all output streams are closed, and if the user doesn't have 906 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */ 907 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { 908 /* disable CC on TV-out */ 909 ivtv_disable_cc(itv); 910 } 911 } else { 912 ivtv_stop_capture(id, 0); 913 } 914 kfree(id); 915 return 0; 916} 917 918int ivtv_v4l2_open(struct file *filp) 919{ 920 struct video_device *vdev = video_devdata(filp); 921 struct ivtv_stream *s = video_get_drvdata(vdev); 922 struct ivtv *itv = s->itv; 923 struct ivtv_open_id *item; 924 int res = 0; 925 926 IVTV_DEBUG_FILE("open %s\n", s->name); 927 928 if (ivtv_init_on_first_open(itv)) { 929 IVTV_ERR("Failed to initialize on device %s\n", 930 video_device_node_name(vdev)); 931 return -ENXIO; 932 } 933 934#ifdef CONFIG_VIDEO_ADV_DEBUG 935 /* Unless ivtv_fw_debug is set, error out if firmware dead. */ 936 if (ivtv_fw_debug) { 937 IVTV_WARN("Opening %s with dead firmware lockout disabled\n", 938 video_device_node_name(vdev)); 939 IVTV_WARN("Selected firmware errors will be ignored\n"); 940 } else { 941#else 942 if (1) { 943#endif 944 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 945 if (res == -EAGAIN) 946 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 947 if (res < 0) 948 return -EIO; 949 } 950 951 if (s->type == IVTV_DEC_STREAM_TYPE_MPG && 952 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) 953 return -EBUSY; 954 955 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 956 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) 957 return -EBUSY; 958 959 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 960 if (read_reg(0x82c) == 0) { 961 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); 962 /* return -ENODEV; */ 963 } 964 ivtv_udma_alloc(itv); 965 } 966 967 /* Allocate memory */ 968 item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); 969 if (NULL == item) { 970 IVTV_DEBUG_WARN("nomem on v4l2 open\n"); 971 return -ENOMEM; 972 } 973 v4l2_fh_init(&item->fh, s->vdev); 974 item->itv = itv; 975 item->type = s->type; 976 977 filp->private_data = &item->fh; 978 v4l2_fh_add(&item->fh); 979 980 if (item->type == IVTV_ENC_STREAM_TYPE_RAD && 981 v4l2_fh_is_singular_file(filp)) { 982 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { 983 if (atomic_read(&itv->capturing) > 0) { 984 /* switching to radio while capture is 985 in progress is not polite */ 986 v4l2_fh_del(&item->fh); 987 v4l2_fh_exit(&item->fh); 988 kfree(item); 989 return -EBUSY; 990 } 991 } 992 /* Mark that the radio is being used. */ 993 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 994 /* We have the radio */ 995 ivtv_mute(itv); 996 /* Switch tuner to radio */ 997 ivtv_call_all(itv, tuner, s_radio); 998 /* Select the correct audio input (i.e. radio tuner) */ 999 ivtv_audio_set_io(itv); 1000 if (itv->hw_flags & IVTV_HW_SAA711X) { 1001 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 1002 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL); 1003 } 1004 /* Done! Unmute and continue. */ 1005 ivtv_unmute(itv); 1006 } 1007 1008 /* YUV or MPG Decoding Mode? */ 1009 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) { 1010 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1011 } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 1012 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1013 /* For yuv, we need to know the dma size before we start */ 1014 itv->dma_data_req_size = 1015 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); 1016 itv->yuv_info.stream_size = 0; 1017 } 1018 return 0; 1019} 1020 1021void ivtv_mute(struct ivtv *itv) 1022{ 1023 if (atomic_read(&itv->capturing)) 1024 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); 1025 IVTV_DEBUG_INFO("Mute\n"); 1026} 1027 1028void ivtv_unmute(struct ivtv *itv) 1029{ 1030 if (atomic_read(&itv->capturing)) { 1031 ivtv_msleep_timeout(100, 0); 1032 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); 1033 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); 1034 } 1035 IVTV_DEBUG_INFO("Unmute\n"); 1036} 1037