diff options
Diffstat (limited to 'drivers/media/pci/ivtv/ivtv-fileops.c')
| -rw-r--r-- | drivers/media/pci/ivtv/ivtv-fileops.c | 1061 |
1 files changed, 1061 insertions, 0 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-fileops.c b/drivers/media/pci/ivtv/ivtv-fileops.c new file mode 100644 index 0000000000..4202c3a47d --- /dev/null +++ b/drivers/media/pci/ivtv/ivtv-fileops.c @@ -0,0 +1,1061 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + file operation functions + Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> + Copyright (C) 2004 Chris Kennedy <c@groovy.org> + Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> + + */ + +#include "ivtv-driver.h" +#include "ivtv-fileops.h" +#include "ivtv-i2c.h" +#include "ivtv-queue.h" +#include "ivtv-udma.h" +#include "ivtv-irq.h" +#include "ivtv-vbi.h" +#include "ivtv-mailbox.h" +#include "ivtv-routing.h" +#include "ivtv-streams.h" +#include "ivtv-yuv.h" +#include "ivtv-ioctl.h" +#include "ivtv-cards.h" +#include "ivtv-firmware.h" +#include <media/v4l2-event.h> +#include <media/i2c/saa7115.h> + +/* This function tries to claim the stream for a specific file descriptor. + If no one else is using this stream then the stream is claimed and + associated VBI streams are also automatically claimed. + Possible error returns: -EBUSY if someone else has claimed + the stream or 0 on success. */ +int ivtv_claim_stream(struct ivtv_open_id *id, int type) +{ + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[type]; + struct ivtv_stream *s_vbi; + int vbi_type; + + if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { + /* someone already claimed this stream */ + if (s->fh == &id->fh) { + /* yes, this file descriptor did. So that's OK. */ + return 0; + } + if (s->fh == NULL && (type == IVTV_DEC_STREAM_TYPE_VBI || + type == IVTV_ENC_STREAM_TYPE_VBI)) { + /* VBI is handled already internally, now also assign + the file descriptor to this stream for external + reading of the stream. */ + s->fh = &id->fh; + IVTV_DEBUG_INFO("Start Read VBI\n"); + return 0; + } + /* someone else is using this stream already */ + IVTV_DEBUG_INFO("Stream %d is busy\n", type); + return -EBUSY; + } + s->fh = &id->fh; + if (type == IVTV_DEC_STREAM_TYPE_VBI) { + /* Enable reinsertion interrupt */ + ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); + } + + /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI, + IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI + (provided VBI insertion is on and sliced VBI is selected), for all + other streams we're done */ + if (type == IVTV_DEC_STREAM_TYPE_MPG) { + vbi_type = IVTV_DEC_STREAM_TYPE_VBI; + } else if (type == IVTV_ENC_STREAM_TYPE_MPG && + itv->vbi.insert_mpeg && !ivtv_raw_vbi(itv)) { + vbi_type = IVTV_ENC_STREAM_TYPE_VBI; + } else { + return 0; + } + s_vbi = &itv->streams[vbi_type]; + + if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) { + /* Enable reinsertion interrupt */ + if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI) + ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); + } + /* mark that it is used internally */ + set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags); + return 0; +} +EXPORT_SYMBOL(ivtv_claim_stream); + +/* This function releases a previously claimed stream. It will take into + account associated VBI streams. */ +void ivtv_release_stream(struct ivtv_stream *s) +{ + struct ivtv *itv = s->itv; + struct ivtv_stream *s_vbi; + + s->fh = NULL; + if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) && + test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { + /* this stream is still in use internally */ + return; + } + if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { + IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name); + return; + } + + ivtv_flush_queues(s); + + /* disable reinsertion interrupt */ + if (s->type == IVTV_DEC_STREAM_TYPE_VBI) + ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); + + /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI, + IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI, + for all other streams we're done */ + if (s->type == IVTV_DEC_STREAM_TYPE_MPG) + s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; + else if (s->type == IVTV_ENC_STREAM_TYPE_MPG) + s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + else + return; + + /* clear internal use flag */ + if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) { + /* was already cleared */ + return; + } + if (s_vbi->fh) { + /* VBI stream still claimed by a file descriptor */ + return; + } + /* disable reinsertion interrupt */ + if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI) + ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); + clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags); + ivtv_flush_queues(s_vbi); +} +EXPORT_SYMBOL(ivtv_release_stream); + +static void ivtv_dualwatch(struct ivtv *itv) +{ + struct v4l2_tuner vt; + u32 new_stereo_mode; + const u32 dual = 0x02; + + new_stereo_mode = v4l2_ctrl_g_ctrl(itv->cxhdl.audio_mode); + memset(&vt, 0, sizeof(vt)); + ivtv_call_all(itv, tuner, g_tuner, &vt); + if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) + new_stereo_mode = dual; + + if (new_stereo_mode == itv->dualwatch_stereo_mode) + return; + + IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n", + itv->dualwatch_stereo_mode, new_stereo_mode); + if (v4l2_ctrl_s_ctrl(itv->cxhdl.audio_mode, new_stereo_mode)) + IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); +} + +static void ivtv_update_pgm_info(struct ivtv *itv) +{ + u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24; + int cnt; + int i = 0; + + if (wr_idx >= itv->pgm_info_num) { + IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num); + return; + } + cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num; + while (i < cnt) { + int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; + struct v4l2_enc_idx_entry *e = itv->pgm_info + idx; + u32 addr = itv->pgm_info_offset + 4 + idx * 24; + const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1, + V4L2_ENC_IDX_FRAME_B, -1, -1, -1 }; + // 1=I, 2=P, 4=B + + e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32); + if (e->offset > itv->mpg_data_received) { + break; + } + e->offset += itv->vbi_data_inserted; + e->length = read_enc(addr); + e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32); + e->flags = mapping[read_enc(addr + 12) & 7]; + i++; + } + itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; +} + +static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err) +{ + struct ivtv *itv = s->itv; + struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + struct ivtv_buffer *buf; + DEFINE_WAIT(wait); + + *err = 0; + while (1) { + if (s->type == IVTV_ENC_STREAM_TYPE_MPG) { + /* Process pending program info updates and pending VBI data */ + ivtv_update_pgm_info(itv); + + if (time_after(jiffies, + itv->dualwatch_jiffies + + msecs_to_jiffies(1000))) { + itv->dualwatch_jiffies = jiffies; + ivtv_dualwatch(itv); + } + + if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && + !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { + while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) { + /* byteswap and process VBI data */ + ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type); + ivtv_enqueue(s_vbi, buf, &s_vbi->q_free); + } + } + buf = &itv->vbi.sliced_mpeg_buf; + if (buf->readpos != buf->bytesused) { + return buf; + } + } + + /* do we have leftover data? */ + buf = ivtv_dequeue(s, &s->q_io); + if (buf) + return buf; + + /* do we have new data? */ + buf = ivtv_dequeue(s, &s->q_full); + if (buf) { + if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0) + return buf; + buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP; + if (s->type == IVTV_ENC_STREAM_TYPE_MPG) + /* byteswap MPG data */ + ivtv_buf_swap(buf); + else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) { + /* byteswap and process VBI data */ + ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type); + } + return buf; + } + + /* return if end of stream */ + if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { + IVTV_DEBUG_INFO("EOS %s\n", s->name); + return NULL; + } + + /* return if file was opened with O_NONBLOCK */ + if (non_block) { + *err = -EAGAIN; + return NULL; + } + + /* wait for more data to arrive */ + mutex_unlock(&itv->serialize_lock); + prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); + /* New buffers might have become available before we were added to the waitqueue */ + if (!s->q_full.buffers) + schedule(); + finish_wait(&s->waitq, &wait); + mutex_lock(&itv->serialize_lock); + if (signal_pending(current)) { + /* return if a signal was received */ + IVTV_DEBUG_INFO("User stopped %s\n", s->name); + *err = -EINTR; + return NULL; + } + } +} + +static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv) +{ + int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; + + itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx]; + itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx]; + itv->vbi.sliced_mpeg_buf.readpos = 0; +} + +static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf, + char __user *ubuf, size_t ucount) +{ + struct ivtv *itv = s->itv; + size_t len = buf->bytesused - buf->readpos; + + if (len > ucount) len = ucount; + if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG && + !ivtv_raw_vbi(itv) && buf != &itv->vbi.sliced_mpeg_buf) { + const char *start = buf->buf + buf->readpos; + const char *p = start + 1; + const u8 *q; + u8 ch = itv->search_pack_header ? 0xba : 0xe0; + int stuffing, i; + + while (start + len > p && (q = memchr(p, 0, start + len - p))) { + p = q + 1; + if ((char *)q + 15 >= buf->buf + buf->bytesused || + q[1] != 0 || q[2] != 1 || q[3] != ch) { + continue; + } + if (!itv->search_pack_header) { + if ((q[6] & 0xc0) != 0x80) + continue; + if (((q[7] & 0xc0) == 0x80 && (q[9] & 0xf0) == 0x20) || + ((q[7] & 0xc0) == 0xc0 && (q[9] & 0xf0) == 0x30)) { + ch = 0xba; + itv->search_pack_header = 1; + p = q + 9; + } + continue; + } + stuffing = q[13] & 7; + /* all stuffing bytes must be 0xff */ + for (i = 0; i < stuffing; i++) + if (q[14 + i] != 0xff) + break; + if (i == stuffing && (q[4] & 0xc4) == 0x44 && (q[12] & 3) == 3 && + q[14 + stuffing] == 0 && q[15 + stuffing] == 0 && + q[16 + stuffing] == 1) { + itv->search_pack_header = 0; + len = (char *)q - start; + ivtv_setup_sliced_vbi_buf(itv); + break; + } + } + } + if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { + IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name); + return -EFAULT; + } + /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount, + buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len, + buf == &itv->vbi.sliced_mpeg_buf); */ + buf->readpos += len; + if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf) + itv->mpg_data_received += len; + return len; +} + +static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block) +{ + struct ivtv *itv = s->itv; + size_t tot_written = 0; + int single_frame = 0; + + if (atomic_read(&itv->capturing) == 0 && s->fh == NULL) { + /* shouldn't happen */ + IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name); + return -EIO; + } + + /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should + arrive one-by-one, so make sure we never output more than one VBI frame at a time */ + if (s->type == IVTV_DEC_STREAM_TYPE_VBI || + (s->type == IVTV_ENC_STREAM_TYPE_VBI && !ivtv_raw_vbi(itv))) + single_frame = 1; + + for (;;) { + struct ivtv_buffer *buf; + int rc; + + buf = ivtv_get_buffer(s, non_block, &rc); + /* if there is no data available... */ + if (buf == NULL) { + /* if we got data, then return that regardless */ + if (tot_written) + break; + /* EOS condition */ + if (rc == 0) { + clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); + clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); + ivtv_release_stream(s); + } + /* set errno */ + return rc; + } + rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); + if (buf != &itv->vbi.sliced_mpeg_buf) { + ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); + } + else if (buf->readpos == buf->bytesused) { + int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; + itv->vbi.sliced_mpeg_size[idx] = 0; + itv->vbi.inserted_frame++; + itv->vbi_data_inserted += buf->bytesused; + } + if (rc < 0) + return rc; + tot_written += rc; + + if (tot_written == tot_count || single_frame) + break; + } + return tot_written; +} + +static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count, + loff_t *pos, int non_block) +{ + ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0; + struct ivtv *itv = s->itv; + + IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); + if (rc > 0) + *pos += rc; + return rc; +} + +int ivtv_start_capture(struct ivtv_open_id *id) +{ + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + struct ivtv_stream *s_vbi; + + if (s->type == IVTV_ENC_STREAM_TYPE_RAD || + s->type == IVTV_DEC_STREAM_TYPE_MPG || + s->type == IVTV_DEC_STREAM_TYPE_YUV || + s->type == IVTV_DEC_STREAM_TYPE_VOUT) { + /* you cannot read from these stream types. */ + return -EINVAL; + } + + /* Try to claim this stream. */ + if (ivtv_claim_stream(id, s->type)) + return -EBUSY; + + /* This stream does not need to start capturing */ + if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { + set_bit(IVTV_F_S_APPL_IO, &s->s_flags); + return 0; + } + + /* If capture is already in progress, then we also have to + do nothing extra. */ + if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) { + set_bit(IVTV_F_S_APPL_IO, &s->s_flags); + return 0; + } + + /* Start VBI capture if required */ + s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + if (s->type == IVTV_ENC_STREAM_TYPE_MPG && + test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && + !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { + /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed + automatically when the MPG stream is claimed. + We only need to start the VBI capturing. */ + if (ivtv_start_v4l2_encode_stream(s_vbi)) { + IVTV_DEBUG_WARN("VBI capture start failed\n"); + + /* Failure, clean up and return an error */ + clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); + clear_bit(IVTV_F_S_STREAMING, &s->s_flags); + /* also releases the associated VBI stream */ + ivtv_release_stream(s); + return -EIO; + } + IVTV_DEBUG_INFO("VBI insertion started\n"); + } + + /* Tell the card to start capturing */ + if (!ivtv_start_v4l2_encode_stream(s)) { + /* We're done */ + set_bit(IVTV_F_S_APPL_IO, &s->s_flags); + /* Resume a possibly paused encoder */ + if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags)) + ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1); + return 0; + } + + /* failure, clean up */ + IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); + + /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released + automatically when the MPG stream is released. + We only need to stop the VBI capturing. */ + if (s->type == IVTV_ENC_STREAM_TYPE_MPG && + test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { + ivtv_stop_v4l2_encode_stream(s_vbi, 0); + clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); + } + clear_bit(IVTV_F_S_STREAMING, &s->s_flags); + ivtv_release_stream(s); + return -EIO; +} + +ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos) +{ + struct ivtv_open_id *id = fh2id(filp->private_data); + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + ssize_t rc; + + IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); + + if (mutex_lock_interruptible(&itv->serialize_lock)) + return -ERESTARTSYS; + rc = ivtv_start_capture(id); + if (!rc) + rc = ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); + mutex_unlock(&itv->serialize_lock); + return rc; +} + +int ivtv_start_decoding(struct ivtv_open_id *id, int speed) +{ + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + int rc; + + if (atomic_read(&itv->decoding) == 0) { + if (ivtv_claim_stream(id, s->type)) { + /* someone else is using this stream already */ + IVTV_DEBUG_WARN("start decode, stream already claimed\n"); + return -EBUSY; + } + rc = ivtv_start_v4l2_decode_stream(s, 0); + if (rc < 0) { + if (rc == -EAGAIN) + rc = ivtv_start_v4l2_decode_stream(s, 0); + if (rc < 0) + return rc; + } + } + if (s->type == IVTV_DEC_STREAM_TYPE_MPG) + return ivtv_set_speed(itv, speed); + return 0; +} + +static ssize_t ivtv_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) +{ + struct ivtv_open_id *id = fh2id(filp->private_data); + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + struct yuv_playback_info *yi = &itv->yuv_info; + struct ivtv_buffer *buf; + struct ivtv_queue q; + int bytes_written = 0; + int mode; + int rc; + DEFINE_WAIT(wait); + + IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name); + + if (s->type != IVTV_DEC_STREAM_TYPE_MPG && + s->type != IVTV_DEC_STREAM_TYPE_YUV && + s->type != IVTV_DEC_STREAM_TYPE_VOUT) + /* not decoder streams */ + return -EINVAL; + + /* Try to claim this stream */ + if (ivtv_claim_stream(id, s->type)) + return -EBUSY; + + /* This stream does not need to start any decoding */ + if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { + int elems = count / sizeof(struct v4l2_sliced_vbi_data); + + set_bit(IVTV_F_S_APPL_IO, &s->s_flags); + return ivtv_write_vbi_from_user(itv, + (const struct v4l2_sliced_vbi_data __user *)user_buf, elems); + } + + mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; + + if (ivtv_set_output_mode(itv, mode) != mode) { + ivtv_release_stream(s); + return -EBUSY; + } + ivtv_queue_init(&q); + set_bit(IVTV_F_S_APPL_IO, &s->s_flags); + + /* Start decoder (returns 0 if already started) */ + rc = ivtv_start_decoding(id, itv->speed); + if (rc) { + IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); + + /* failure, clean up */ + clear_bit(IVTV_F_S_STREAMING, &s->s_flags); + clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); + return rc; + } + +retry: + /* If possible, just DMA the entire frame - Check the data transfer size + since we may get here before the stream has been fully set-up */ + if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { + while (count >= itv->dma_data_req_size) { + rc = ivtv_yuv_udma_stream_frame(itv, (void __user *)user_buf); + + if (rc < 0) + return rc; + + bytes_written += itv->dma_data_req_size; + user_buf += itv->dma_data_req_size; + count -= itv->dma_data_req_size; + } + if (count == 0) { + IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); + return bytes_written; + } + } + + for (;;) { + /* Gather buffers */ + while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) + ivtv_enqueue(s, buf, &q); + while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { + ivtv_enqueue(s, buf, &q); + } + if (q.buffers) + break; + if (filp->f_flags & O_NONBLOCK) + return -EAGAIN; + mutex_unlock(&itv->serialize_lock); + prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); + /* New buffers might have become free before we were added to the waitqueue */ + if (!s->q_free.buffers) + schedule(); + finish_wait(&s->waitq, &wait); + mutex_lock(&itv->serialize_lock); + if (signal_pending(current)) { + IVTV_DEBUG_INFO("User stopped %s\n", s->name); + return -EINTR; + } + } + + /* copy user data into buffers */ + while ((buf = ivtv_dequeue(s, &q))) { + /* yuv is a pain. Don't copy more data than needed for a single + frame, otherwise we lose sync with the incoming stream */ + if (s->type == IVTV_DEC_STREAM_TYPE_YUV && + yi->stream_size + count > itv->dma_data_req_size) + rc = ivtv_buf_copy_from_user(s, buf, user_buf, + itv->dma_data_req_size - yi->stream_size); + else + rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); + + /* Make sure we really got all the user data */ + if (rc < 0) { + ivtv_queue_move(s, &q, NULL, &s->q_free, 0); + return rc; + } + user_buf += rc; + count -= rc; + bytes_written += rc; + + if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { + yi->stream_size += rc; + /* If we have a complete yuv frame, break loop now */ + if (yi->stream_size == itv->dma_data_req_size) { + ivtv_enqueue(s, buf, &s->q_full); + yi->stream_size = 0; + break; + } + } + + if (buf->bytesused != s->buf_size) { + /* incomplete, leave in q_io for next time */ + ivtv_enqueue(s, buf, &s->q_io); + break; + } + /* Byteswap MPEG buffer */ + if (s->type == IVTV_DEC_STREAM_TYPE_MPG) + ivtv_buf_swap(buf); + ivtv_enqueue(s, buf, &s->q_full); + } + + if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { + if (s->q_full.length >= itv->dma_data_req_size) { + int got_sig; + + if (mode == OUT_YUV) + ivtv_yuv_setup_stream_frame(itv); + + mutex_unlock(&itv->serialize_lock); + prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); + while (!(got_sig = signal_pending(current)) && + test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { + schedule(); + } + finish_wait(&itv->dma_waitq, &wait); + mutex_lock(&itv->serialize_lock); + if (got_sig) { + IVTV_DEBUG_INFO("User interrupted %s\n", s->name); + return -EINTR; + } + + clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); + ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); + ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); + } + } + /* more user data is available, wait until buffers become free + to transfer the rest. */ + if (count && !(filp->f_flags & O_NONBLOCK)) + goto retry; + IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); + return bytes_written; +} + +ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) +{ + struct ivtv_open_id *id = fh2id(filp->private_data); + struct ivtv *itv = id->itv; + ssize_t res; + + if (mutex_lock_interruptible(&itv->serialize_lock)) + return -ERESTARTSYS; + res = ivtv_write(filp, user_buf, count, pos); + mutex_unlock(&itv->serialize_lock); + return res; +} + +__poll_t ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) +{ + struct ivtv_open_id *id = fh2id(filp->private_data); + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + __poll_t res = 0; + + /* add stream's waitq to the poll list */ + IVTV_DEBUG_HI_FILE("Decoder poll\n"); + + /* If there are subscribed events, then only use the new event + API instead of the old video.h based API. */ + if (!list_empty(&id->fh.subscribed)) { + poll_wait(filp, &id->fh.wait, wait); + /* Turn off the old-style vsync events */ + clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); + if (v4l2_event_pending(&id->fh)) + res = EPOLLPRI; + } else { + /* This is the old-style API which is here only for backwards + compatibility. */ + poll_wait(filp, &s->waitq, wait); + set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); + if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || + test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) + res = EPOLLPRI; + } + + /* Allow write if buffers are available for writing */ + if (s->q_free.buffers) + res |= EPOLLOUT | EPOLLWRNORM; + return res; +} + +__poll_t ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait) +{ + __poll_t req_events = poll_requested_events(wait); + struct ivtv_open_id *id = fh2id(filp->private_data); + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); + __poll_t res = 0; + + /* Start a capture if there is none */ + if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags) && + s->type != IVTV_ENC_STREAM_TYPE_RAD && + (req_events & (EPOLLIN | EPOLLRDNORM))) { + int rc; + + mutex_lock(&itv->serialize_lock); + rc = ivtv_start_capture(id); + mutex_unlock(&itv->serialize_lock); + if (rc) { + IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", + s->name, rc); + return EPOLLERR; + } + IVTV_DEBUG_FILE("Encoder poll started capture\n"); + } + + /* add stream's waitq to the poll list */ + IVTV_DEBUG_HI_FILE("Encoder poll\n"); + poll_wait(filp, &s->waitq, wait); + if (v4l2_event_pending(&id->fh)) + res |= EPOLLPRI; + else + poll_wait(filp, &id->fh.wait, wait); + + if (s->q_full.length || s->q_io.length) + return res | EPOLLIN | EPOLLRDNORM; + if (eof) + return res | EPOLLHUP; + return res; +} + +void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) +{ + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + + IVTV_DEBUG_FILE("close() of %s\n", s->name); + + /* 'Unclaim' this stream */ + + /* Stop capturing */ + if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { + struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; + + IVTV_DEBUG_INFO("close stopping capture\n"); + /* Special case: a running VBI capture for VBI insertion + in the mpeg stream. Need to stop that too. */ + if (id->type == IVTV_ENC_STREAM_TYPE_MPG && + test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && + !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { + IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); + ivtv_stop_v4l2_encode_stream(s_vbi, 0); + } + if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || + id->type == IVTV_ENC_STREAM_TYPE_VBI) && + test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { + /* Also used internally, don't stop capturing */ + s->fh = NULL; + } + else { + ivtv_stop_v4l2_encode_stream(s, gop_end); + } + } + if (!gop_end) { + clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); + clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); + ivtv_release_stream(s); + } +} + +static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) +{ + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + + IVTV_DEBUG_FILE("close() of %s\n", s->name); + + if (id->type == IVTV_DEC_STREAM_TYPE_YUV && + test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { + /* Restore registers we've changed & clean up any mess */ + ivtv_yuv_close(itv); + } + + /* Stop decoding */ + if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { + IVTV_DEBUG_INFO("close stopping decode\n"); + + ivtv_stop_v4l2_decode_stream(s, flags, pts); + itv->output_mode = OUT_NONE; + } + clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); + clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); + + if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames) + itv->output_mode = OUT_NONE; + + itv->speed = 0; + clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags); + ivtv_release_stream(s); +} + +int ivtv_v4l2_close(struct file *filp) +{ + struct v4l2_fh *fh = filp->private_data; + struct ivtv_open_id *id = fh2id(fh); + struct ivtv *itv = id->itv; + struct ivtv_stream *s = &itv->streams[id->type]; + + IVTV_DEBUG_FILE("close %s\n", s->name); + + mutex_lock(&itv->serialize_lock); + + /* Stop radio */ + if (id->type == IVTV_ENC_STREAM_TYPE_RAD && + v4l2_fh_is_singular_file(filp)) { + /* Closing radio device, return to TV mode */ + ivtv_mute(itv); + /* Mark that the radio is no longer in use */ + clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); + /* Switch tuner to TV */ + ivtv_call_all(itv, video, s_std, itv->std); + /* Select correct audio input (i.e. TV tuner or Line in) */ + ivtv_audio_set_io(itv); + if (itv->hw_flags & IVTV_HW_SAA711X) { + ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, + SAA7115_FREQ_32_11_MHZ, 0); + } + if (atomic_read(&itv->capturing) > 0) { + /* Undo video mute */ + ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, + v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute) | + (v4l2_ctrl_g_ctrl(itv->cxhdl.video_mute_yuv) << 8)); + } + /* Done! Unmute and continue. */ + ivtv_unmute(itv); + } + + v4l2_fh_del(fh); + v4l2_fh_exit(fh); + + /* Easy case first: this stream was never claimed by us */ + if (s->fh != &id->fh) + goto close_done; + + /* 'Unclaim' this stream */ + + if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { + struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; + + ivtv_stop_decoding(id, V4L2_DEC_CMD_STOP_TO_BLACK | V4L2_DEC_CMD_STOP_IMMEDIATELY, 0); + + /* If all output streams are closed, and if the user doesn't have + IVTV_DEC_STREAM_TYPE_VOUT open, then disable CC on TV-out. */ + if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { + /* disable CC on TV-out */ + ivtv_disable_cc(itv); + } + } else { + ivtv_stop_capture(id, 0); + } +close_done: + kfree(id); + mutex_unlock(&itv->serialize_lock); + return 0; +} + +static int ivtv_open(struct file *filp) +{ + struct video_device *vdev = video_devdata(filp); + struct ivtv_stream *s = video_get_drvdata(vdev); + struct ivtv *itv = s->itv; + struct ivtv_open_id *item; + int res = 0; + + IVTV_DEBUG_FILE("open %s\n", s->name); + + if (ivtv_init_on_first_open(itv)) { + IVTV_ERR("Failed to initialize on device %s\n", + video_device_node_name(vdev)); + return -ENXIO; + } + +#ifdef CONFIG_VIDEO_ADV_DEBUG + /* Unless ivtv_fw_debug is set, error out if firmware dead. */ + if (ivtv_fw_debug) { + IVTV_WARN("Opening %s with dead firmware lockout disabled\n", + video_device_node_name(vdev)); + IVTV_WARN("Selected firmware errors will be ignored\n"); + } else { +#else + if (1) { +#endif + res = ivtv_firmware_check(itv, "ivtv_serialized_open"); + if (res == -EAGAIN) + res = ivtv_firmware_check(itv, "ivtv_serialized_open"); + if (res < 0) + return -EIO; + } + + if (s->type == IVTV_DEC_STREAM_TYPE_MPG && + test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) + return -EBUSY; + + if (s->type == IVTV_DEC_STREAM_TYPE_YUV && + test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) + return -EBUSY; + + if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { + if (read_reg(0x82c) == 0) { + IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); + /* return -ENODEV; */ + } + ivtv_udma_alloc(itv); + } + + /* Allocate memory */ + item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); + if (NULL == item) { + IVTV_DEBUG_WARN("nomem on v4l2 open\n"); + return -ENOMEM; + } + v4l2_fh_init(&item->fh, &s->vdev); + item->itv = itv; + item->type = s->type; + + filp->private_data = &item->fh; + v4l2_fh_add(&item->fh); + + if (item->type == IVTV_ENC_STREAM_TYPE_RAD && + v4l2_fh_is_singular_file(filp)) { + if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { + if (atomic_read(&itv->capturing) > 0) { + /* switching to radio while capture is + in progress is not polite */ + v4l2_fh_del(&item->fh); + v4l2_fh_exit(&item->fh); + kfree(item); + return -EBUSY; + } + } + /* Mark that the radio is being used. */ + set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); + /* We have the radio */ + ivtv_mute(itv); + /* Switch tuner to radio */ + ivtv_call_all(itv, tuner, s_radio); + /* Select the correct audio input (i.e. radio tuner) */ + ivtv_audio_set_io(itv); + if (itv->hw_flags & IVTV_HW_SAA711X) { + ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq, + SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL); + } + /* Done! Unmute and continue. */ + ivtv_unmute(itv); + } + + /* YUV or MPG Decoding Mode? */ + if (s->type == IVTV_DEC_STREAM_TYPE_MPG) { + clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); + } else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { + set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); + /* For yuv, we need to know the dma size before we start */ + itv->dma_data_req_size = + 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); + itv->yuv_info.stream_size = 0; + } + return 0; +} + +int ivtv_v4l2_open(struct file *filp) +{ + struct video_device *vdev = video_devdata(filp); + int res; + + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + res = ivtv_open(filp); + mutex_unlock(vdev->lock); + return res; +} + +void ivtv_mute(struct ivtv *itv) +{ + if (atomic_read(&itv->capturing)) + ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); + IVTV_DEBUG_INFO("Mute\n"); +} + +void ivtv_unmute(struct ivtv *itv) +{ + if (atomic_read(&itv->capturing)) { + ivtv_msleep_timeout(100, 0); + ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); + ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); + } + IVTV_DEBUG_INFO("Unmute\n"); +} |