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-audio.h" 31#include "ivtv-streams.h" 32#include "ivtv-yuv.h" 33#include "ivtv-controls.h" 34#include "ivtv-ioctl.h" 35#include "ivtv-cards.h" 36#include <media/saa7115.h> 37 38/* This function tries to claim the stream for a specific file descriptor. 39 If no one else is using this stream then the stream is claimed and 40 associated VBI streams are also automatically claimed. 41 Possible error returns: -EBUSY if someone else has claimed 42 the stream or 0 on success. */ 43int ivtv_claim_stream(struct ivtv_open_id *id, int type) 44{ 45 struct ivtv *itv = id->itv; 46 struct ivtv_stream *s = &itv->streams[type]; 47 struct ivtv_stream *s_vbi; 48 int vbi_type; 49 50 if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { 51 /* someone already claimed this stream */ 52 if (s->id == id->open_id) { 53 /* yes, this file descriptor did. So that's OK. */ 54 return 0; 55 } 56 if (s->id == -1 && (type == IVTV_DEC_STREAM_TYPE_VBI || 57 type == IVTV_ENC_STREAM_TYPE_VBI)) { 58 /* VBI is handled already internally, now also assign 59 the file descriptor to this stream for external 60 reading of the stream. */ 61 s->id = id->open_id; 62 IVTV_DEBUG_INFO("Start Read VBI\n"); 63 return 0; 64 } 65 /* someone else is using this stream already */ 66 IVTV_DEBUG_INFO("Stream %d is busy\n", type); 67 return -EBUSY; 68 } 69 s->id = id->open_id; 70 if (type == IVTV_DEC_STREAM_TYPE_VBI) { 71 /* Enable reinsertion interrupt */ 72 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 73 } 74 75 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI, 76 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI 77 (provided VBI insertion is on and sliced VBI is selected), for all 78 other streams we're done */ 79 if (type == IVTV_DEC_STREAM_TYPE_MPG) { 80 vbi_type = IVTV_DEC_STREAM_TYPE_VBI; 81 } else if (type == IVTV_ENC_STREAM_TYPE_MPG && 82 itv->vbi.insert_mpeg && itv->vbi.sliced_in->service_set) { 83 vbi_type = IVTV_ENC_STREAM_TYPE_VBI; 84 } else { 85 return 0; 86 } 87 s_vbi = &itv->streams[vbi_type]; 88 89 if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) { 90 /* Enable reinsertion interrupt */ 91 if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI) 92 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 93 } 94 /* mark that it is used internally */ 95 set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags); 96 return 0; 97} 98 99/* This function releases a previously claimed stream. It will take into 100 account associated VBI streams. */ 101void ivtv_release_stream(struct ivtv_stream *s) 102{ 103 struct ivtv *itv = s->itv; 104 struct ivtv_stream *s_vbi; 105 106 s->id = -1; 107 if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) && 108 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 109 /* this stream is still in use internally */ 110 return; 111 } 112 if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { 113 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name); 114 return; 115 } 116 117 ivtv_flush_queues(s); 118 119 /* disable reinsertion interrupt */ 120 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) 121 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 122 123 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI, 124 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI, 125 for all other streams we're done */ 126 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 127 s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; 128 else if (s->type == IVTV_ENC_STREAM_TYPE_MPG) 129 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 130 else 131 return; 132 133 /* clear internal use flag */ 134 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) { 135 /* was already cleared */ 136 return; 137 } 138 if (s_vbi->id != -1) { 139 /* VBI stream still claimed by a file descriptor */ 140 return; 141 } 142 /* disable reinsertion interrupt */ 143 if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI) 144 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 145 clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags); 146 ivtv_flush_queues(s_vbi); 147} 148 149static void ivtv_dualwatch(struct ivtv *itv) 150{ 151 struct v4l2_tuner vt; 152 u16 new_bitmap; 153 u16 new_stereo_mode; 154 const u16 stereo_mask = 0x0300; 155 const u16 dual = 0x0200; 156 157 new_stereo_mode = itv->params.audio_properties & stereo_mask; 158 memset(&vt, 0, sizeof(vt)); 159 ivtv_call_i2c_clients(itv, VIDIOC_G_TUNER, &vt); 160 if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) 161 new_stereo_mode = dual; 162 163 if (new_stereo_mode == itv->dualwatch_stereo_mode) 164 return; 165 166 new_bitmap = new_stereo_mode | (itv->params.audio_properties & ~stereo_mask); 167 168 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. new audio_bitmask=0x%ux\n", 169 itv->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); 170 171 if (ivtv_vapi(itv, CX2341X_ENC_SET_AUDIO_PROPERTIES, 1, new_bitmap) == 0) { 172 itv->dualwatch_stereo_mode = new_stereo_mode; 173 return; 174 } 175 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); 176} 177 178static void ivtv_update_pgm_info(struct ivtv *itv) 179{ 180 u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24; 181 int cnt; 182 int i = 0; 183 184 if (wr_idx >= itv->pgm_info_num) { 185 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num); 186 return; 187 } 188 cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num; 189 while (i < cnt) { 190 int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 191 struct v4l2_enc_idx_entry *e = itv->pgm_info + idx; 192 u32 addr = itv->pgm_info_offset + 4 + idx * 24; 193 const int mapping[] = { V4L2_ENC_IDX_FRAME_P, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_B, 0 }; 194 195 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32); 196 if (e->offset > itv->mpg_data_received) { 197 break; 198 } 199 e->offset += itv->vbi_data_inserted; 200 e->length = read_enc(addr); 201 e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32); 202 e->flags = mapping[read_enc(addr + 12) & 3]; 203 i++; 204 } 205 itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 206} 207 208static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err) 209{ 210 struct ivtv *itv = s->itv; 211 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 212 struct ivtv_buffer *buf; 213 DEFINE_WAIT(wait); 214 215 *err = 0; 216 while (1) { 217 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) { 218 /* Process pending program info updates and pending VBI data */ 219 ivtv_update_pgm_info(itv); 220 221 if (jiffies - itv->dualwatch_jiffies > HZ) { 222 itv->dualwatch_jiffies = jiffies; 223 ivtv_dualwatch(itv); 224 } 225 226 if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 227 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 228 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) { 229 /* byteswap and process VBI data */ 230 ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type); 231 ivtv_enqueue(s_vbi, buf, &s_vbi->q_free); 232 } 233 } 234 buf = &itv->vbi.sliced_mpeg_buf; 235 if (buf->readpos != buf->bytesused) { 236 return buf; 237 } 238 } 239 240 /* do we have leftover data? */ 241 buf = ivtv_dequeue(s, &s->q_io); 242 if (buf) 243 return buf; 244 245 /* do we have new data? */ 246 buf = ivtv_dequeue(s, &s->q_full); 247 if (buf) { 248 if (!test_and_clear_bit(IVTV_F_B_NEED_BUF_SWAP, &buf->b_flags)) 249 return buf; 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 /* return if file was opened with O_NONBLOCK */ 260 if (non_block) { 261 *err = -EAGAIN; 262 return NULL; 263 } 264 265 /* return if end of stream */ 266 if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 267 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 268 IVTV_DEBUG_INFO("EOS %s\n", s->name); 269 return NULL; 270 } 271 272 /* wait for more data to arrive */ 273 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 274 /* New buffers might have become available before we were added to the waitqueue */ 275 if (!s->q_full.buffers) 276 schedule(); 277 finish_wait(&s->waitq, &wait); 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 itv->vbi.sliced_in->service_set && 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->id == -1) { 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 && itv->vbi.sliced_in->service_set)) 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 (buf == NULL && rc == -EAGAIN && tot_written) 380 break; 381 if (buf == NULL) 382 return rc; 383 rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); 384 if (buf != &itv->vbi.sliced_mpeg_buf) { 385 ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); 386 } 387 else if (buf->readpos == buf->bytesused) { 388 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 389 itv->vbi.sliced_mpeg_size[idx] = 0; 390 itv->vbi.inserted_frame++; 391 itv->vbi_data_inserted += buf->bytesused; 392 } 393 if (rc < 0) 394 return rc; 395 tot_written += rc; 396 397 if (tot_written == tot_count || single_frame) 398 break; 399 } 400 return tot_written; 401} 402 403static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count, 404 loff_t *pos, int non_block) 405{ 406 ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0; 407 struct ivtv *itv = s->itv; 408 409 IVTV_DEBUG_INFO("read %zd from %s, got %zd\n", count, s->name, rc); 410 if (rc > 0) 411 pos += rc; 412 return rc; 413} 414 415int ivtv_start_capture(struct ivtv_open_id *id) 416{ 417 struct ivtv *itv = id->itv; 418 struct ivtv_stream *s = &itv->streams[id->type]; 419 struct ivtv_stream *s_vbi; 420 421 if (s->type == IVTV_ENC_STREAM_TYPE_RAD || 422 s->type == IVTV_DEC_STREAM_TYPE_MPG || 423 s->type == IVTV_DEC_STREAM_TYPE_YUV || 424 s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 425 /* you cannot read from these stream types. */ 426 return -EPERM; 427 } 428 429 /* Try to claim this stream. */ 430 if (ivtv_claim_stream(id, s->type)) 431 return -EBUSY; 432 433 /* This stream does not need to start capturing */ 434 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { 435 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 436 return 0; 437 } 438 439 /* If capture is already in progress, then we also have to 440 do nothing extra. */ 441 if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 442 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 443 return 0; 444 } 445 446 /* Start VBI capture if required */ 447 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 448 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 449 test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 450 !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 451 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed 452 automatically when the MPG stream is claimed. 453 We only need to start the VBI capturing. */ 454 if (ivtv_start_v4l2_encode_stream(s_vbi)) { 455 IVTV_DEBUG_WARN("VBI capture start failed\n"); 456 457 /* Failure, clean up and return an error */ 458 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 459 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 460 /* also releases the associated VBI stream */ 461 ivtv_release_stream(s); 462 return -EIO; 463 } 464 IVTV_DEBUG_INFO("VBI insertion started\n"); 465 } 466 467 /* Tell the card to start capturing */ 468 if (!ivtv_start_v4l2_encode_stream(s)) { 469 /* We're done */ 470 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 471 /* Resume a possibly paused encoder */ 472 if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags)) 473 ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1); 474 return 0; 475 } 476 477 /* failure, clean up */ 478 IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); 479 480 /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released 481 automatically when the MPG stream is released. 482 We only need to stop the VBI capturing. */ 483 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && 484 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { 485 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 486 clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); 487 } 488 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 489 ivtv_release_stream(s); 490 return -EIO; 491} 492 493ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos) 494{ 495 struct ivtv_open_id *id = filp->private_data; 496 struct ivtv *itv = id->itv; 497 struct ivtv_stream *s = &itv->streams[id->type]; 498 int rc; 499 500 IVTV_DEBUG_IOCTL("read %zd bytes from %s\n", count, s->name); 501 502 rc = ivtv_start_capture(id); 503 if (rc) 504 return rc; 505 return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); 506} 507 508int ivtv_start_decoding(struct ivtv_open_id *id, int speed) 509{ 510 struct ivtv *itv = id->itv; 511 struct ivtv_stream *s = &itv->streams[id->type]; 512 513 if (atomic_read(&itv->decoding) == 0) { 514 if (ivtv_claim_stream(id, s->type)) { 515 /* someone else is using this stream already */ 516 IVTV_DEBUG_WARN("start decode, stream already claimed\n"); 517 return -EBUSY; 518 } 519 ivtv_start_v4l2_decode_stream(s, 0); 520 } 521 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 522 return ivtv_set_speed(itv, speed); 523 return 0; 524} 525 526ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 527{ 528 struct ivtv_open_id *id = filp->private_data; 529 struct ivtv *itv = id->itv; 530 struct ivtv_stream *s = &itv->streams[id->type]; 531 struct ivtv_buffer *buf; 532 struct ivtv_queue q; 533 int bytes_written = 0; 534 int mode; 535 int rc; 536 DEFINE_WAIT(wait); 537 538 IVTV_DEBUG_IOCTL("write %zd bytes to %s\n", count, s->name); 539 540 if (s->type != IVTV_DEC_STREAM_TYPE_MPG && 541 s->type != IVTV_DEC_STREAM_TYPE_YUV && 542 s->type != IVTV_DEC_STREAM_TYPE_VOUT) 543 /* not decoder streams */ 544 return -EPERM; 545 546 /* Try to claim this stream */ 547 if (ivtv_claim_stream(id, s->type)) 548 return -EBUSY; 549 550 /* This stream does not need to start any decoding */ 551 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 552 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 553 return ivtv_write_vbi(itv, user_buf, count); 554 } 555 556 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; 557 558 if (ivtv_set_output_mode(itv, mode) != mode) { 559 ivtv_release_stream(s); 560 return -EBUSY; 561 } 562 ivtv_queue_init(&q); 563 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 564 565retry: 566 for (;;) { 567 /* Gather buffers */ 568 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) 569 ivtv_enqueue(s, buf, &q); 570 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { 571 ivtv_enqueue(s, buf, &q); 572 } 573 if (q.buffers) 574 break; 575 if (filp->f_flags & O_NONBLOCK) 576 return -EAGAIN; 577 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 578 /* New buffers might have become free before we were added to the waitqueue */ 579 if (!s->q_free.buffers) 580 schedule(); 581 finish_wait(&s->waitq, &wait); 582 if (signal_pending(current)) { 583 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 584 return -EINTR; 585 } 586 } 587 588 /* copy user data into buffers */ 589 while ((buf = ivtv_dequeue(s, &q))) { 590 /* Make sure we really got all the user data */ 591 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); 592 593 if (rc < 0) { 594 ivtv_queue_move(s, &q, NULL, &s->q_free, 0); 595 return rc; 596 } 597 user_buf += rc; 598 count -= rc; 599 bytes_written += rc; 600 601 if (buf->bytesused != s->buf_size) { 602 /* incomplete, leave in q_io for next time */ 603 ivtv_enqueue(s, buf, &s->q_io); 604 break; 605 } 606 /* Byteswap MPEG buffer */ 607 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 608 ivtv_buf_swap(buf); 609 ivtv_enqueue(s, buf, &s->q_full); 610 } 611 612 /* Start decoder (returns 0 if already started) */ 613 rc = ivtv_start_decoding(id, itv->speed); 614 if (rc) { 615 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); 616 617 /* failure, clean up */ 618 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 619 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 620 return rc; 621 } 622 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { 623 if (s->q_full.length >= itv->dma_data_req_size) { 624 int got_sig; 625 626 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); 627 while (!(got_sig = signal_pending(current)) && 628 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { 629 schedule(); 630 } 631 finish_wait(&itv->dma_waitq, &wait); 632 if (got_sig) { 633 IVTV_DEBUG_INFO("User interrupted %s\n", s->name); 634 return -EINTR; 635 } 636 637 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); 638 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); 639 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); 640 } 641 } 642 /* more user data is available, wait until buffers become free 643 to transfer the rest. */ 644 if (count && !(filp->f_flags & O_NONBLOCK)) 645 goto retry; 646 IVTV_DEBUG_INFO("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 647 return bytes_written; 648} 649 650unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) 651{ 652 struct ivtv_open_id *id = filp->private_data; 653 struct ivtv *itv = id->itv; 654 struct ivtv_stream *s = &itv->streams[id->type]; 655 int res = 0; 656 657 /* add stream's waitq to the poll list */ 658 poll_wait(filp, &s->waitq, wait); 659 660 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 661 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || 662 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) 663 res = POLLPRI; 664 665 /* Allow write if buffers are available for writing */ 666 if (s->q_free.buffers) 667 res |= POLLOUT | POLLWRNORM; 668 return res; 669} 670 671unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait) 672{ 673 struct ivtv_open_id *id = filp->private_data; 674 struct ivtv *itv = id->itv; 675 struct ivtv_stream *s = &itv->streams[id->type]; 676 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 677 678 /* Start a capture if there is none */ 679 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 680 int rc = ivtv_start_capture(id); 681 682 if (rc) { 683 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", 684 s->name, rc); 685 return POLLERR; 686 } 687 } 688 689 /* add stream's waitq to the poll list */ 690 poll_wait(filp, &s->waitq, wait); 691 692 if (eof || s->q_full.length) 693 return POLLIN | POLLRDNORM; 694 return 0; 695} 696 697void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) 698{ 699 struct ivtv *itv = id->itv; 700 struct ivtv_stream *s = &itv->streams[id->type]; 701 702 IVTV_DEBUG_IOCTL("close() of %s\n", s->name); 703 704 /* 'Unclaim' this stream */ 705 706 /* Stop capturing */ 707 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 708 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 709 710 IVTV_DEBUG_INFO("close stopping capture\n"); 711 /* Special case: a running VBI capture for VBI insertion 712 in the mpeg stream. Need to stop that too. */ 713 if (id->type == IVTV_ENC_STREAM_TYPE_MPG && 714 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && 715 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 716 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); 717 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 718 } 719 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || 720 id->type == IVTV_ENC_STREAM_TYPE_VBI) && 721 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 722 /* Also used internally, don't stop capturing */ 723 s->id = -1; 724 } 725 else { 726 ivtv_stop_v4l2_encode_stream(s, gop_end); 727 } 728 } 729 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 730 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 731 732 ivtv_release_stream(s); 733} 734 735static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) 736{ 737 struct ivtv *itv = id->itv; 738 struct ivtv_stream *s = &itv->streams[id->type]; 739 740 IVTV_DEBUG_IOCTL("close() of %s\n", s->name); 741 742 /* Stop decoding */ 743 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 744 IVTV_DEBUG_INFO("close stopping decode\n"); 745 746 ivtv_stop_v4l2_decode_stream(s, flags, pts); 747 } 748 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 749 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 750 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { 751 /* Restore registers we've changed & clean up any mess we've made */ 752 ivtv_yuv_close(itv); 753 } 754 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_YUV) 755 itv->output_mode = OUT_NONE; 756 else if (s->type == IVTV_DEC_STREAM_TYPE_MPG && itv->output_mode == OUT_MPG) 757 itv->output_mode = OUT_NONE; 758 759 itv->speed = 0; 760 ivtv_release_stream(s); 761} 762 763int ivtv_v4l2_close(struct inode *inode, struct file *filp) 764{ 765 struct ivtv_open_id *id = filp->private_data; 766 struct ivtv *itv = id->itv; 767 struct ivtv_stream *s = &itv->streams[id->type]; 768 769 IVTV_DEBUG_IOCTL("close() of %s\n", s->name); 770 771 v4l2_prio_close(&itv->prio, &id->prio); 772 773 /* Easy case first: this stream was never claimed by us */ 774 if (s->id != id->open_id) { 775 kfree(id); 776 return 0; 777 } 778 779 /* 'Unclaim' this stream */ 780 781 /* Stop radio */ 782 if (id->type == IVTV_ENC_STREAM_TYPE_RAD) { 783 /* Closing radio device, return to TV mode */ 784 ivtv_mute(itv); 785 /* Mark that the radio is no longer in use */ 786 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 787 /* Switch tuner to TV */ 788 ivtv_call_i2c_clients(itv, VIDIOC_S_STD, &itv->std); 789 /* Select correct audio input (i.e. TV tuner or Line in) */ 790 ivtv_audio_set_io(itv); 791 if (itv->hw_flags & IVTV_HW_SAA711X) 792 { 793 struct v4l2_crystal_freq crystal_freq; 794 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ; 795 crystal_freq.flags = 0; 796 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq); 797 } 798 /* Done! Unmute and continue. */ 799 ivtv_unmute(itv); 800 ivtv_release_stream(s); 801 } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { 802 ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0); 803 } else { 804 ivtv_stop_capture(id, 0); 805 } 806 kfree(id); 807 return 0; 808} 809 810int ivtv_v4l2_open(struct inode *inode, struct file *filp) 811{ 812 int x, y = 0; 813 struct ivtv_open_id *item; 814 struct ivtv *itv = NULL; 815 struct ivtv_stream *s = NULL; 816 int minor = iminor(inode); 817 818 /* Find which card this open was on */ 819 spin_lock(&ivtv_cards_lock); 820 for (x = 0; itv == NULL && x < ivtv_cards_active; x++) { 821 /* find out which stream this open was on */ 822 for (y = 0; y < IVTV_MAX_STREAMS; y++) { 823 s = &ivtv_cards[x]->streams[y]; 824 if (s->v4l2dev && s->v4l2dev->minor == minor) { 825 itv = ivtv_cards[x]; 826 break; 827 } 828 } 829 } 830 spin_unlock(&ivtv_cards_lock); 831 832 if (itv == NULL) { 833 /* Couldn't find a device registered 834 on that minor, shouldn't happen! */ 835 printk(KERN_WARNING "ivtv: no ivtv device found on minor %d\n", minor); 836 return -ENXIO; 837 } 838 839 if (y == IVTV_DEC_STREAM_TYPE_MPG && 840 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) 841 return -EBUSY; 842 843 if (y == IVTV_DEC_STREAM_TYPE_YUV && 844 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) 845 return -EBUSY; 846 847 if (y == IVTV_DEC_STREAM_TYPE_YUV) { 848 if (read_reg(0x82c) == 0) { 849 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); 850 /* return -ENODEV; */ 851 } 852 ivtv_udma_alloc(itv); 853 } 854 855 /* Allocate memory */ 856 item = kmalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); 857 if (NULL == item) { 858 IVTV_DEBUG_WARN("nomem on v4l2 open\n"); 859 return -ENOMEM; 860 } 861 item->itv = itv; 862 item->type = y; 863 v4l2_prio_open(&itv->prio, &item->prio); 864 865 item->open_id = itv->open_id++; 866 filp->private_data = item; 867 868 if (item->type == IVTV_ENC_STREAM_TYPE_RAD) { 869 /* Try to claim this stream */ 870 if (ivtv_claim_stream(item, item->type)) { 871 /* No, it's already in use */ 872 kfree(item); 873 return -EBUSY; 874 } 875 876 /* We have the radio */ 877 ivtv_mute(itv); 878 /* Switch tuner to radio */ 879 ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL); 880 /* Mark that the radio is being used. */ 881 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 882 /* Select the correct audio input (i.e. radio tuner) */ 883 ivtv_audio_set_io(itv); 884 if (itv->hw_flags & IVTV_HW_SAA711X) 885 { 886 struct v4l2_crystal_freq crystal_freq; 887 crystal_freq.freq = SAA7115_FREQ_32_11_MHZ; 888 crystal_freq.flags = SAA7115_FREQ_FL_APLL; 889 ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq); 890 } 891 /* Done! Unmute and continue. */ 892 ivtv_unmute(itv); 893 } 894 895 /* YUV or MPG Decoding Mode? */ 896 if (y == IVTV_DEC_STREAM_TYPE_MPG) 897 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 898 else if (y == IVTV_DEC_STREAM_TYPE_YUV) 899 { 900 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 901 } 902 903 return 0; 904} 905 906void ivtv_mute(struct ivtv *itv) 907{ 908 struct v4l2_control ctrl = { V4L2_CID_AUDIO_MUTE, 1 }; 909 910 /* Mute sound to avoid pop */ 911 ivtv_control_ioctls(itv, VIDIOC_S_CTRL, &ctrl); 912 913 if (atomic_read(&itv->capturing)) 914 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); 915 916 IVTV_DEBUG_INFO("Mute\n"); 917} 918 919void ivtv_unmute(struct ivtv *itv) 920{ 921 struct v4l2_control ctrl = { V4L2_CID_AUDIO_MUTE, 0 }; 922 923 /* initialize or refresh input */ 924 if (atomic_read(&itv->capturing) == 0) 925 ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0); 926 927 ivtv_sleep_timeout(HZ / 10, 0); 928 929 if (atomic_read(&itv->capturing)) { 930 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); 931 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); 932 } 933 934 /* Unmute */ 935 ivtv_control_ioctls(itv, VIDIOC_S_CTRL, &ctrl); 936 IVTV_DEBUG_INFO("Unmute\n"); 937} 938