1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 file operation functions 4 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> 5 Copyright (C) 2004 Chris Kennedy <c@groovy.org> 6 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> 7 8 */ 9 10#include "ivtv-driver.h" 11#include "ivtv-fileops.h" 12#include "ivtv-i2c.h" 13#include "ivtv-queue.h" 14#include "ivtv-udma.h" 15#include "ivtv-irq.h" 16#include "ivtv-vbi.h" 17#include "ivtv-mailbox.h" 18#include "ivtv-routing.h" 19#include "ivtv-streams.h" 20#include "ivtv-yuv.h" 21#include "ivtv-ioctl.h" 22#include "ivtv-cards.h" 23#include "ivtv-firmware.h" 24#include <media/v4l2-event.h> 25#include <media/i2c/saa7115.h> 26 27/* This function tries to claim the stream for a specific file descriptor. 28 If no one else is using this stream then the stream is claimed and 29 associated VBI streams are also automatically claimed. 30 Possible error returns: -EBUSY if someone else has claimed 31 the stream or 0 on success. */ 32int ivtv_claim_stream(struct ivtv_open_id *id, int type) 33{ 34 struct ivtv *itv = id->itv; 35 struct ivtv_stream *s = &itv->streams[type]; 36 struct ivtv_stream *s_vbi; 37 int vbi_type; 38 39 if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { 40 /* someone already claimed this stream */ 41 if (s->fh == &id->fh) { 42 /* yes, this file descriptor did. So that's OK. */ 43 return 0; 44 } 45 if (s->fh == NULL && (type == IVTV_DEC_STREAM_TYPE_VBI || 46 type == IVTV_ENC_STREAM_TYPE_VBI)) { 47 /* VBI is handled already internally, now also assign 48 the file descriptor to this stream for external 49 reading of the stream. */ 50 s->fh = &id->fh; 51 IVTV_DEBUG_INFO("Start Read VBI\n"); 52 return 0; 53 } 54 /* someone else is using this stream already */ 55 IVTV_DEBUG_INFO("Stream %d is busy\n", type); 56 return -EBUSY; 57 } 58 s->fh = &id->fh; 59 if (type == IVTV_DEC_STREAM_TYPE_VBI) { 60 /* Enable reinsertion interrupt */ 61 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 62 } 63 64 /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI, 65 IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI 66 (provided VBI insertion is on and sliced VBI is selected), for all 67 other streams we're done */ 68 if (type == IVTV_DEC_STREAM_TYPE_MPG) { 69 vbi_type = IVTV_DEC_STREAM_TYPE_VBI; 70 } else if (type == IVTV_ENC_STREAM_TYPE_MPG && 71 itv->vbi.insert_mpeg && !ivtv_raw_vbi(itv)) { 72 vbi_type = IVTV_ENC_STREAM_TYPE_VBI; 73 } else { 74 return 0; 75 } 76 s_vbi = &itv->streams[vbi_type]; 77 78 if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) { 79 /* Enable reinsertion interrupt */ 80 if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI) 81 ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 82 } 83 /* mark that it is used internally */ 84 set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags); 85 return 0; 86} 87EXPORT_SYMBOL(ivtv_claim_stream); 88 89/* This function releases a previously claimed stream. It will take into 90 account associated VBI streams. */ 91void ivtv_release_stream(struct ivtv_stream *s) 92{ 93 struct ivtv *itv = s->itv; 94 struct ivtv_stream *s_vbi; 95 96 s->fh = NULL; 97 if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) && 98 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 99 /* this stream is still in use internally */ 100 return; 101 } 102 if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { 103 IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name); 104 return; 105 } 106 107 ivtv_flush_queues(s); 108 109 /* disable reinsertion interrupt */ 110 if (s->type == IVTV_DEC_STREAM_TYPE_VBI) 111 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 112 113 /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI, 114 IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI, 115 for all other streams we're done */ 116 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 117 s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; 118 else if (s->type == IVTV_ENC_STREAM_TYPE_MPG) 119 s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 120 else 121 return; 122 123 /* clear internal use flag */ 124 if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) { 125 /* was already cleared */ 126 return; 127 } 128 if (s_vbi->fh) { 129 /* VBI stream still claimed by a file descriptor */ 130 return; 131 } 132 /* disable reinsertion interrupt */ 133 if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI) 134 ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); 135 clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags); 136 ivtv_flush_queues(s_vbi); 137} 138EXPORT_SYMBOL(ivtv_release_stream); 139 140static void ivtv_dualwatch(struct ivtv *itv) 141{ 142 struct v4l2_tuner vt; 143 u32 new_stereo_mode; 144 const u32 dual = 0x02; 145 146 new_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode); 147 memset(&vt, 0, sizeof(vt)); 148 ivtv_call_all(itv, tuner, g_tuner, &vt); 149 if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) 150 new_stereo_mode = dual; 151 152 if (new_stereo_mode == itv->dualwatch_stereo_mode) 153 return; 154 155 IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n", 156 itv->dualwatch_stereo_mode, new_stereo_mode); 157 if (v4l2_ctrl_s_ctrl(itv->cxhdl.audio_mode, new_stereo_mode)) 158 IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); 159} 160 161static void ivtv_update_pgm_info(struct ivtv *itv) 162{ 163 u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24; 164 int cnt; 165 int i = 0; 166 167 if (wr_idx >= itv->pgm_info_num) { 168 IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num); 169 return; 170 } 171 cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num; 172 while (i < cnt) { 173 int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 174 struct v4l2_enc_idx_entry *e = itv->pgm_info + idx; 175 u32 addr = itv->pgm_info_offset + 4 + idx * 24; 176 const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1, 177 V4L2_ENC_IDX_FRAME_B, -1, -1, -1 }; 178 // 1=I, 2=P, 4=B 179 180 e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32); 181 if (e->offset > itv->mpg_data_received) { 182 break; 183 } 184 e->offset += itv->vbi_data_inserted; 185 e->length = read_enc(addr); 186 e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32); 187 e->flags = mapping[read_enc(addr + 12) & 7]; 188 i++; 189 } 190 itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; 191} 192 193static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err) 194{ 195 struct ivtv *itv = s->itv; 196 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 197 struct ivtv_buffer *buf; 198 DEFINE_WAIT(wait); 199 200 *err = 0; 201 while (1) { 202 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) { 203 /* Process pending program info updates and pending VBI data */ 204 ivtv_update_pgm_info(itv); 205 206 if (time_after(jiffies, 207 itv->dualwatch_jiffies + 208 msecs_to_jiffies(1000))) { 209 itv->dualwatch_jiffies = jiffies; 210 ivtv_dualwatch(itv); 211 } 212 213 if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && 214 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 215 while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) { 216 /* byteswap and process VBI data */ 217 ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type); 218 ivtv_enqueue(s_vbi, buf, &s_vbi->q_free); 219 } 220 } 221 buf = &itv->vbi.sliced_mpeg_buf; 222 if (buf->readpos != buf->bytesused) { 223 return buf; 224 } 225 } 226 227 /* do we have leftover data? */ 228 buf = ivtv_dequeue(s, &s->q_io); 229 if (buf) 230 return buf; 231 232 /* do we have new data? */ 233 buf = ivtv_dequeue(s, &s->q_full); 234 if (buf) { 235 if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0) 236 return buf; 237 buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP; 238 if (s->type == IVTV_ENC_STREAM_TYPE_MPG) 239 /* byteswap MPG data */ 240 ivtv_buf_swap(buf); 241 else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) { 242 /* byteswap and process VBI data */ 243 ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type); 244 } 245 return buf; 246 } 247 248 /* return if end of stream */ 249 if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 250 IVTV_DEBUG_INFO("EOS %s\n", s->name); 251 return NULL; 252 } 253 254 /* return if file was opened with O_NONBLOCK */ 255 if (non_block) { 256 *err = -EAGAIN; 257 return NULL; 258 } 259 260 /* wait for more data to arrive */ 261 mutex_unlock(&itv->serialize_lock); 262 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 263 /* New buffers might have become available before we were added to the waitqueue */ 264 if (!s->q_full.buffers) 265 schedule(); 266 finish_wait(&s->waitq, &wait); 267 mutex_lock(&itv->serialize_lock); 268 if (signal_pending(current)) { 269 /* return if a signal was received */ 270 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 271 *err = -EINTR; 272 return NULL; 273 } 274 } 275} 276 277static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv) 278{ 279 int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; 280 281 itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx]; 282 itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx]; 283 itv->vbi.sliced_mpeg_buf.readpos = 0; 284} 285 286static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf, 287 char __user *ubuf, size_t ucount) 288{ 289 struct ivtv *itv = s->itv; 290 size_t len = buf->bytesused - buf->readpos; 291 292 if (len > ucount) len = ucount; 293 if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG && 294 !ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) { 295 const char *start = buf->buf + buf->readpos; 296 const char *p = start + 1; 297 const u8 *q; 298 u8 ch = itv->search_pack_header ? 0xba : 0xe0; 299 int stuffing, i; 300 301 while (start + len > p && (q = memchr(p, 0, start + len - p))) { 302 p = q + 1; 303 if ((char *)q + 15 >= buf->buf + buf->bytesused || 304 q[1] != 0 || q[2] != 1 || q[3] != ch) { 305 continue; 306 } 307 if (!itv->search_pack_header) { 308 if ((q[6] & 0xc0) != 0x80) 309 continue; 310 if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) || 311 ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) { 312 ch = 0xba; 313 itv->search_pack_header = 1; 314 p = q + 9; 315 } 316 continue; 317 } 318 stuffing = q[13] & 7; 319 /* all stuffing bytes must be 0xff */ 320 for (i = 0; i < stuffing; i++) 321 if (q[14 + i] != 0xff) 322 break; 323 if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 && 324 q[14 + stuffing] == 0 && q[15 + stuffing] == 0 && 325 q[16 + stuffing] == 1) { 326 itv->search_pack_header = 0; 327 len = (char *)q - start; 328 ivtv_setup_sliced_vbi_buf(itv); 329 break; 330 } 331 } 332 } 333 if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { 334 IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name); 335 return -EFAULT; 336 } 337 /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount, 338 buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len, 339 buf == &itv->vbi.sliced_mpeg_buf); */ 340 buf->readpos += len; 341 if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf) 342 itv->mpg_data_received += len; 343 return len; 344} 345 346static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block) 347{ 348 struct ivtv *itv = s->itv; 349 size_t tot_written = 0; 350 int single_frame = 0; 351 352 if (atomic_read(&itv->capturing) == 0 && s->fh == NULL) { 353 /* shouldn't happen */ 354 IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name); 355 return -EIO; 356 } 357 358 /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should 359 arrive one-by-one, so make sure we never output more than one VBI frame at a time */ 360 if (s->type == IVTV_DEC_STREAM_TYPE_VBI || 361 (s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv))) 362 single_frame = 1; 363 364 for (;;) { 365 struct ivtv_buffer *buf; 366 int rc; 367 368 buf = ivtv_get_buffer(s, non_block, &rc); 369 /* if there is no data available... */ 370 if (buf == NULL) { 371 /* if we got data, then return that regardless */ 372 if (tot_written) 373 break; 374 /* EOS condition */ 375 if (rc == 0) { 376 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 377 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 378 ivtv_release_stream(s); 379 } 380 /* set errno */ 381 return rc; 382 } 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_HI_FILE("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 -EINVAL; 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 = fh2id(filp->private_data); 496 struct ivtv *itv = id->itv; 497 struct ivtv_stream *s = &itv->streams[id->type]; 498 ssize_t rc; 499 500 IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); 501 502 if (mutex_lock_interruptible(&itv->serialize_lock)) 503 return -ERESTARTSYS; 504 rc = ivtv_start_capture(id); 505 if (!rc) 506 rc = ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); 507 mutex_unlock(&itv->serialize_lock); 508 return rc; 509} 510 511int ivtv_start_decoding(struct ivtv_open_id *id, int speed) 512{ 513 struct ivtv *itv = id->itv; 514 struct ivtv_stream *s = &itv->streams[id->type]; 515 int rc; 516 517 if (atomic_read(&itv->decoding) == 0) { 518 if (ivtv_claim_stream(id, s->type)) { 519 /* someone else is using this stream already */ 520 IVTV_DEBUG_WARN("start decode, stream already claimed\n"); 521 return -EBUSY; 522 } 523 rc = ivtv_start_v4l2_decode_stream(s, 0); 524 if (rc < 0) { 525 if (rc == -EAGAIN) 526 rc = ivtv_start_v4l2_decode_stream(s, 0); 527 if (rc < 0) 528 return rc; 529 } 530 } 531 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 532 return ivtv_set_speed(itv, speed); 533 return 0; 534} 535 536static ssize_t ivtv_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 537{ 538 struct ivtv_open_id *id = fh2id(filp->private_data); 539 struct ivtv *itv = id->itv; 540 struct ivtv_stream *s = &itv->streams[id->type]; 541 struct yuv_playback_info *yi = &itv->yuv_info; 542 struct ivtv_buffer *buf; 543 struct ivtv_queue q; 544 int bytes_written = 0; 545 int mode; 546 int rc; 547 DEFINE_WAIT(wait); 548 549 IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name); 550 551 if (s->type != IVTV_DEC_STREAM_TYPE_MPG && 552 s->type != IVTV_DEC_STREAM_TYPE_YUV && 553 s->type != IVTV_DEC_STREAM_TYPE_VOUT) 554 /* not decoder streams */ 555 return -EINVAL; 556 557 /* Try to claim this stream */ 558 if (ivtv_claim_stream(id, s->type)) 559 return -EBUSY; 560 561 /* This stream does not need to start any decoding */ 562 if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { 563 int elems = count / sizeof(struct v4l2_sliced_vbi_data); 564 565 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 566 return ivtv_write_vbi_from_user(itv, 567 (const struct v4l2_sliced_vbi_data __user *)user_buf, elems); 568 } 569 570 mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; 571 572 if (ivtv_set_output_mode(itv, mode) != mode) { 573 ivtv_release_stream(s); 574 return -EBUSY; 575 } 576 ivtv_queue_init(&q); 577 set_bit(IVTV_F_S_APPL_IO, &s->s_flags); 578 579 /* Start decoder (returns 0 if already started) */ 580 rc = ivtv_start_decoding(id, itv->speed); 581 if (rc) { 582 IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); 583 584 /* failure, clean up */ 585 clear_bit(IVTV_F_S_STREAMING, &s->s_flags); 586 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 587 return rc; 588 } 589 590retry: 591 /* If possible, just DMA the entire frame - Check the data transfer size 592 since we may get here before the stream has been fully set-up */ 593 if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { 594 while (count >= itv->dma_data_req_size) { 595 rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf); 596 597 if (rc < 0) 598 return rc; 599 600 bytes_written += itv->dma_data_req_size; 601 user_buf += itv->dma_data_req_size; 602 count -= itv->dma_data_req_size; 603 } 604 if (count == 0) { 605 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 606 return bytes_written; 607 } 608 } 609 610 for (;;) { 611 /* Gather buffers */ 612 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) 613 ivtv_enqueue(s, buf, &q); 614 while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { 615 ivtv_enqueue(s, buf, &q); 616 } 617 if (q.buffers) 618 break; 619 if (filp->f_flags & O_NONBLOCK) 620 return -EAGAIN; 621 mutex_unlock(&itv->serialize_lock); 622 prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); 623 /* New buffers might have become free before we were added to the waitqueue */ 624 if (!s->q_free.buffers) 625 schedule(); 626 finish_wait(&s->waitq, &wait); 627 mutex_lock(&itv->serialize_lock); 628 if (signal_pending(current)) { 629 IVTV_DEBUG_INFO("User stopped %s\n", s->name); 630 return -EINTR; 631 } 632 } 633 634 /* copy user data into buffers */ 635 while ((buf = ivtv_dequeue(s, &q))) { 636 /* yuv is a pain. Don't copy more data than needed for a single 637 frame, otherwise we lose sync with the incoming stream */ 638 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 639 yi->stream_size + count > itv->dma_data_req_size) 640 rc = ivtv_buf_copy_from_user(s, buf, user_buf, 641 itv->dma_data_req_size - yi->stream_size); 642 else 643 rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); 644 645 /* Make sure we really got all the user data */ 646 if (rc < 0) { 647 ivtv_queue_move(s, &q, NULL, &s->q_free, 0); 648 return rc; 649 } 650 user_buf += rc; 651 count -= rc; 652 bytes_written += rc; 653 654 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 655 yi->stream_size += rc; 656 /* If we have a complete yuv frame, break loop now */ 657 if (yi->stream_size == itv->dma_data_req_size) { 658 ivtv_enqueue(s, buf, &s->q_full); 659 yi->stream_size = 0; 660 break; 661 } 662 } 663 664 if (buf->bytesused != s->buf_size) { 665 /* incomplete, leave in q_io for next time */ 666 ivtv_enqueue(s, buf, &s->q_io); 667 break; 668 } 669 /* Byteswap MPEG buffer */ 670 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) 671 ivtv_buf_swap(buf); 672 ivtv_enqueue(s, buf, &s->q_full); 673 } 674 675 if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { 676 if (s->q_full.length >= itv->dma_data_req_size) { 677 int got_sig; 678 679 if (mode == OUT_YUV) 680 ivtv_yuv_setup_stream_frame(itv); 681 682 mutex_unlock(&itv->serialize_lock); 683 prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); 684 while (!(got_sig = signal_pending(current)) && 685 test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { 686 schedule(); 687 } 688 finish_wait(&itv->dma_waitq, &wait); 689 mutex_lock(&itv->serialize_lock); 690 if (got_sig) { 691 IVTV_DEBUG_INFO("User interrupted %s\n", s->name); 692 return -EINTR; 693 } 694 695 clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); 696 ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); 697 ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); 698 } 699 } 700 /* more user data is available, wait until buffers become free 701 to transfer the rest. */ 702 if (count && !(filp->f_flags & O_NONBLOCK)) 703 goto retry; 704 IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); 705 return bytes_written; 706} 707 708ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) 709{ 710 struct ivtv_open_id *id = fh2id(filp->private_data); 711 struct ivtv *itv = id->itv; 712 ssize_t res; 713 714 if (mutex_lock_interruptible(&itv->serialize_lock)) 715 return -ERESTARTSYS; 716 res = ivtv_write(filp, user_buf, count, pos); 717 mutex_unlock(&itv->serialize_lock); 718 return res; 719} 720 721__poll_t ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) 722{ 723 struct ivtv_open_id *id = fh2id(filp->private_data); 724 struct ivtv *itv = id->itv; 725 struct ivtv_stream *s = &itv->streams[id->type]; 726 __poll_t res = 0; 727 728 /* add stream's waitq to the poll list */ 729 IVTV_DEBUG_HI_FILE("Decoder poll\n"); 730 731 /* If there are subscribed events, then only use the new event 732 API instead of the old video.h based API. */ 733 if (!list_empty(&id->fh.subscribed)) { 734 poll_wait(filp, &id->fh.wait, wait); 735 /* Turn off the old-style vsync events */ 736 clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 737 if (v4l2_event_pending(&id->fh)) 738 res = EPOLLPRI; 739 } else { 740 /* This is the old-style API which is here only for backwards 741 compatibility. */ 742 poll_wait(filp, &s->waitq, wait); 743 set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); 744 if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || 745 test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) 746 res = EPOLLPRI; 747 } 748 749 /* Allow write if buffers are available for writing */ 750 if (s->q_free.buffers) 751 res |= EPOLLOUT | EPOLLWRNORM; 752 return res; 753} 754 755__poll_t ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait) 756{ 757 __poll_t req_events = poll_requested_events(wait); 758 struct ivtv_open_id *id = fh2id(filp->private_data); 759 struct ivtv *itv = id->itv; 760 struct ivtv_stream *s = &itv->streams[id->type]; 761 int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 762 __poll_t res = 0; 763 764 /* Start a capture if there is none */ 765 if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags) && 766 s->type != IVTV_ENC_STREAM_TYPE_RAD && 767 (req_events & (EPOLLIN | EPOLLRDNORM))) { 768 int rc; 769 770 mutex_lock(&itv->serialize_lock); 771 rc = ivtv_start_capture(id); 772 mutex_unlock(&itv->serialize_lock); 773 if (rc) { 774 IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", 775 s->name, rc); 776 return EPOLLERR; 777 } 778 IVTV_DEBUG_FILE("Encoder poll started capture\n"); 779 } 780 781 /* add stream's waitq to the poll list */ 782 IVTV_DEBUG_HI_FILE("Encoder poll\n"); 783 poll_wait(filp, &s->waitq, wait); 784 if (v4l2_event_pending(&id->fh)) 785 res |= EPOLLPRI; 786 else 787 poll_wait(filp, &id->fh.wait, wait); 788 789 if (s->q_full.length || s->q_io.length) 790 return res | EPOLLIN | EPOLLRDNORM; 791 if (eof) 792 return res | EPOLLHUP; 793 return res; 794} 795 796void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) 797{ 798 struct ivtv *itv = id->itv; 799 struct ivtv_stream *s = &itv->streams[id->type]; 800 801 IVTV_DEBUG_FILE("close() of %s\n", s->name); 802 803 /* 'Unclaim' this stream */ 804 805 /* Stop capturing */ 806 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 807 struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; 808 809 IVTV_DEBUG_INFO("close stopping capture\n"); 810 /* Special case: a running VBI capture for VBI insertion 811 in the mpeg stream. Need to stop that too. */ 812 if (id->type == IVTV_ENC_STREAM_TYPE_MPG && 813 test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && 814 !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { 815 IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); 816 ivtv_stop_v4l2_encode_stream(s_vbi, 0); 817 } 818 if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || 819 id->type == IVTV_ENC_STREAM_TYPE_VBI) && 820 test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { 821 /* Also used internally, don't stop capturing */ 822 s->fh = NULL; 823 } 824 else { 825 ivtv_stop_v4l2_encode_stream(s, gop_end); 826 } 827 } 828 if (!gop_end) { 829 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 830 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 831 ivtv_release_stream(s); 832 } 833} 834 835static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) 836{ 837 struct ivtv *itv = id->itv; 838 struct ivtv_stream *s = &itv->streams[id->type]; 839 840 IVTV_DEBUG_FILE("close() of %s\n", s->name); 841 842 if (id->type == IVTV_DEC_STREAM_TYPE_YUV && 843 test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { 844 /* Restore registers we've changed & clean up any mess */ 845 ivtv_yuv_close(itv); 846 } 847 848 /* Stop decoding */ 849 if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { 850 IVTV_DEBUG_INFO("close stopping decode\n"); 851 852 ivtv_stop_v4l2_decode_stream(s, flags, pts); 853 itv->output_mode = OUT_NONE; 854 } 855 clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); 856 clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); 857 858 if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames) 859 itv->output_mode = OUT_NONE; 860 861 itv->speed = 0; 862 clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags); 863 ivtv_release_stream(s); 864} 865 866int ivtv_v4l2_close(struct file *filp) 867{ 868 struct v4l2_fh *fh = filp->private_data; 869 struct ivtv_open_id *id = fh2id(fh); 870 struct ivtv *itv = id->itv; 871 struct ivtv_stream *s = &itv->streams[id->type]; 872 873 IVTV_DEBUG_FILE("close %s\n", s->name); 874 875 mutex_lock(&itv->serialize_lock); 876 877 /* Stop radio */ 878 if (id->type == IVTV_ENC_STREAM_TYPE_RAD && 879 v4l2_fh_is_singular_file(filp)) { 880 /* Closing radio device, return to TV mode */ 881 ivtv_mute(itv); 882 /* Mark that the radio is no longer in use */ 883 clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 884 /* Switch tuner to TV */ 885 ivtv_call_all(itv, video, s_std, itv->std); 886 /* Select correct audio input (i.e. TV tuner or Line in) */ 887 ivtv_audio_set_io(itv); 888 if (itv->hw_flags & IVTV_HW_SAA711X) { 889 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 890 SAA7115_FREQ_32_11_MHZ, 0); 891 } 892 if (atomic_read(&itv->capturing) > 0) { 893 /* Undo video mute */ 894 ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, 895 v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) | 896 (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8)); 897 } 898 /* Done! Unmute and continue. */ 899 ivtv_unmute(itv); 900 } 901 902 v4l2_fh_del(fh); 903 v4l2_fh_exit(fh); 904 905 /* Easy case first: this stream was never claimed by us */ 906 if (s->fh != &id->fh) 907 goto close_done; 908 909 /* 'Unclaim' this stream */ 910 911 if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { 912 struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; 913 914 ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0); 915 916 /* If all output streams are closed, and if the user doesn't have 917 IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */ 918 if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { 919 /* disable CC on TV-out */ 920 ivtv_disable_cc(itv); 921 } 922 } else { 923 ivtv_stop_capture(id, 0); 924 } 925close_done: 926 kfree(id); 927 mutex_unlock(&itv->serialize_lock); 928 return 0; 929} 930 931static int ivtv_open(struct file *filp) 932{ 933 struct video_device *vdev = video_devdata(filp); 934 struct ivtv_stream *s = video_get_drvdata(vdev); 935 struct ivtv *itv = s->itv; 936 struct ivtv_open_id *item; 937 int res = 0; 938 939 IVTV_DEBUG_FILE("open %s\n", s->name); 940 941 if (ivtv_init_on_first_open(itv)) { 942 IVTV_ERR("Failed to initialize on device %s\n", 943 video_device_node_name(vdev)); 944 return -ENXIO; 945 } 946 947#ifdef CONFIG_VIDEO_ADV_DEBUG 948 /* Unless ivtv_fw_debug is set, error out if firmware dead. */ 949 if (ivtv_fw_debug) { 950 IVTV_WARN("Opening %s with dead firmware lockout disabled\n", 951 video_device_node_name(vdev)); 952 IVTV_WARN("Selected firmware errors will be ignored\n"); 953 } else { 954#else 955 if (1) { 956#endif 957 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 958 if (res == -EAGAIN) 959 res = ivtv_firmware_check(itv, "ivtv_serialized_open"); 960 if (res < 0) 961 return -EIO; 962 } 963 964 if (s->type == IVTV_DEC_STREAM_TYPE_MPG && 965 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) 966 return -EBUSY; 967 968 if (s->type == IVTV_DEC_STREAM_TYPE_YUV && 969 test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) 970 return -EBUSY; 971 972 if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 973 if (read_reg(0x82c) == 0) { 974 IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); 975 /* return -ENODEV; */ 976 } 977 ivtv_udma_alloc(itv); 978 } 979 980 /* Allocate memory */ 981 item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); 982 if (NULL == item) { 983 IVTV_DEBUG_WARN("nomem on v4l2 open\n"); 984 return -ENOMEM; 985 } 986 v4l2_fh_init(&item->fh, &s->vdev); 987 item->itv = itv; 988 item->type = s->type; 989 990 filp->private_data = &item->fh; 991 v4l2_fh_add(&item->fh); 992 993 if (item->type == IVTV_ENC_STREAM_TYPE_RAD && 994 v4l2_fh_is_singular_file(filp)) { 995 if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { 996 if (atomic_read(&itv->capturing) > 0) { 997 /* switching to radio while capture is 998 in progress is not polite */ 999 v4l2_fh_del(&item->fh); 1000 v4l2_fh_exit(&item->fh); 1001 kfree(item); 1002 return -EBUSY; 1003 } 1004 } 1005 /* Mark that the radio is being used. */ 1006 set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); 1007 /* We have the radio */ 1008 ivtv_mute(itv); 1009 /* Switch tuner to radio */ 1010 ivtv_call_all(itv, tuner, s_radio); 1011 /* Select the correct audio input (i.e. radio tuner) */ 1012 ivtv_audio_set_io(itv); 1013 if (itv->hw_flags & IVTV_HW_SAA711X) { 1014 ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, 1015 SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL); 1016 } 1017 /* Done! Unmute and continue. */ 1018 ivtv_unmute(itv); 1019 } 1020 1021 /* YUV or MPG Decoding Mode? */ 1022 if (s->type == IVTV_DEC_STREAM_TYPE_MPG) { 1023 clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1024 } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { 1025 set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); 1026 /* For yuv, we need to know the dma size before we start */ 1027 itv->dma_data_req_size = 1028 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); 1029 itv->yuv_info.stream_size = 0; 1030 } 1031 return 0; 1032} 1033 1034int ivtv_v4l2_open(struct file *filp) 1035{ 1036 struct video_device *vdev = video_devdata(filp); 1037 int res; 1038 1039 if (mutex_lock_interruptible(vdev->lock)) 1040 return -ERESTARTSYS; 1041 res = ivtv_open(filp); 1042 mutex_unlock(vdev->lock); 1043 return res; 1044} 1045 1046void ivtv_mute(struct ivtv *itv) 1047{ 1048 if (atomic_read(&itv->capturing)) 1049 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); 1050 IVTV_DEBUG_INFO("Mute\n"); 1051} 1052 1053void ivtv_unmute(struct ivtv *itv) 1054{ 1055 if (atomic_read(&itv->capturing)) { 1056 ivtv_msleep_timeout(100, 0); 1057 ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); 1058 ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); 1059 } 1060 IVTV_DEBUG_INFO("Unmute\n"); 1061} 1062