--- /dev/null
+/*
+ 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>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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/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;
+}
+
+unsigned int 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];
+ int 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 = POLLPRI;
+ } 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 = POLLPRI;
+ }
+
+ /* Allow write if buffers are available for writing */
+ if (s->q_free.buffers)
+ res |= POLLOUT | POLLWRNORM;
+ return res;
+}
+
+unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table *wait)
+{
+ unsigned long 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);
+ unsigned 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 & (POLLIN | POLLRDNORM))) {
+ 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 POLLERR;
+ }
+ 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 |= POLLPRI;
+ else
+ poll_wait(filp, &id->fh.wait, wait);
+
+ if (s->q_full.length || s->q_io.length)
+ return res | POLLIN | POLLRDNORM;
+ if (eof)
+ return res | POLLHUP;
+ 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");
+}
Code Review / kvmfornfv.git / blobdiff