v4.19.13 snapshot.
diff --git a/drivers/media/pci/cx18/cx18-fileops.c b/drivers/media/pci/cx18/cx18-fileops.c
new file mode 100644
index 0000000..a3f44e3
--- /dev/null
+++ b/drivers/media/pci/cx18/cx18-fileops.c
@@ -0,0 +1,883 @@
+/*
+ * cx18 file operation functions
+ *
+ * Derived from ivtv-fileops.c
+ *
+ * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
+ *
+ * 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.
+ */
+
+#include "cx18-driver.h"
+#include "cx18-fileops.h"
+#include "cx18-i2c.h"
+#include "cx18-queue.h"
+#include "cx18-vbi.h"
+#include "cx18-audio.h"
+#include "cx18-mailbox.h"
+#include "cx18-scb.h"
+#include "cx18-streams.h"
+#include "cx18-controls.h"
+#include "cx18-ioctl.h"
+#include "cx18-cards.h"
+#include <media/v4l2-event.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 and IDX streams are also automatically claimed.
+ Possible error returns: -EBUSY if someone else has claimed
+ the stream or 0 on success. */
+int cx18_claim_stream(struct cx18_open_id *id, int type)
+{
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[type];
+ struct cx18_stream *s_assoc;
+
+ /* Nothing should ever try to directly claim the IDX stream */
+ if (type == CX18_ENC_STREAM_TYPE_IDX) {
+ CX18_WARN("MPEG Index stream cannot be claimed directly, but something tried.\n");
+ return -EINVAL;
+ }
+
+ if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
+ /* someone already claimed this stream */
+ if (s->id == id->open_id) {
+ /* yes, this file descriptor did. So that's OK. */
+ return 0;
+ }
+ if (s->id == -1 && type == CX18_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->id = id->open_id;
+ CX18_DEBUG_INFO("Start Read VBI\n");
+ return 0;
+ }
+ /* someone else is using this stream already */
+ CX18_DEBUG_INFO("Stream %d is busy\n", type);
+ return -EBUSY;
+ }
+ s->id = id->open_id;
+
+ /*
+ * CX18_ENC_STREAM_TYPE_MPG needs to claim:
+ * CX18_ENC_STREAM_TYPE_VBI, if VBI insertion is on for sliced VBI, or
+ * CX18_ENC_STREAM_TYPE_IDX, if VBI insertion is off for sliced VBI
+ * (We don't yet fix up MPEG Index entries for our inserted packets).
+ *
+ * For all other streams we're done.
+ */
+ if (type != CX18_ENC_STREAM_TYPE_MPG)
+ return 0;
+
+ s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
+ if (cx->vbi.insert_mpeg && !cx18_raw_vbi(cx))
+ s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
+ else if (!cx18_stream_enabled(s_assoc))
+ return 0;
+
+ set_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
+
+ /* mark that it is used internally */
+ set_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags);
+ return 0;
+}
+EXPORT_SYMBOL(cx18_claim_stream);
+
+/* This function releases a previously claimed stream. It will take into
+ account associated VBI streams. */
+void cx18_release_stream(struct cx18_stream *s)
+{
+ struct cx18 *cx = s->cx;
+ struct cx18_stream *s_assoc;
+
+ s->id = -1;
+ if (s->type == CX18_ENC_STREAM_TYPE_IDX) {
+ /*
+ * The IDX stream is only used internally, and can
+ * only be indirectly unclaimed by unclaiming the MPG stream.
+ */
+ return;
+ }
+
+ if (s->type == CX18_ENC_STREAM_TYPE_VBI &&
+ test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) {
+ /* this stream is still in use internally */
+ return;
+ }
+ if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
+ CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name);
+ return;
+ }
+
+ cx18_flush_queues(s);
+
+ /*
+ * CX18_ENC_STREAM_TYPE_MPG needs to release the
+ * CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams.
+ *
+ * For all other streams we're done.
+ */
+ if (s->type != CX18_ENC_STREAM_TYPE_MPG)
+ return;
+
+ /* Unclaim the associated MPEG Index stream */
+ s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
+ if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) {
+ clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
+ cx18_flush_queues(s_assoc);
+ }
+
+ /* Unclaim the associated VBI stream */
+ s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
+ if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) {
+ if (s_assoc->id == -1) {
+ /*
+ * The VBI stream is not still claimed by a file
+ * descriptor, so completely unclaim it.
+ */
+ clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
+ cx18_flush_queues(s_assoc);
+ }
+ }
+}
+EXPORT_SYMBOL(cx18_release_stream);
+
+static void cx18_dualwatch(struct cx18 *cx)
+{
+ struct v4l2_tuner vt;
+ u32 new_stereo_mode;
+ const u32 dual = 0x0200;
+
+ new_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
+ memset(&vt, 0, sizeof(vt));
+ cx18_call_all(cx, 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 == cx->dualwatch_stereo_mode)
+ return;
+
+ CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x.\n",
+ cx->dualwatch_stereo_mode, new_stereo_mode);
+ if (v4l2_ctrl_s_ctrl(cx->cxhdl.audio_mode, new_stereo_mode))
+ CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n");
+}
+
+
+static struct cx18_mdl *cx18_get_mdl(struct cx18_stream *s, int non_block,
+ int *err)
+{
+ struct cx18 *cx = s->cx;
+ struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
+ struct cx18_mdl *mdl;
+ DEFINE_WAIT(wait);
+
+ *err = 0;
+ while (1) {
+ if (s->type == CX18_ENC_STREAM_TYPE_MPG) {
+ /* Process pending program updates and VBI data */
+ if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) {
+ cx->dualwatch_jiffies = jiffies;
+ cx18_dualwatch(cx);
+ }
+ if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
+ !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) {
+ while ((mdl = cx18_dequeue(s_vbi,
+ &s_vbi->q_full))) {
+ /* byteswap and process VBI data */
+ cx18_process_vbi_data(cx, mdl,
+ s_vbi->type);
+ cx18_stream_put_mdl_fw(s_vbi, mdl);
+ }
+ }
+ mdl = &cx->vbi.sliced_mpeg_mdl;
+ if (mdl->readpos != mdl->bytesused)
+ return mdl;
+ }
+
+ /* do we have new data? */
+ mdl = cx18_dequeue(s, &s->q_full);
+ if (mdl) {
+ if (!test_and_clear_bit(CX18_F_M_NEED_SWAP,
+ &mdl->m_flags))
+ return mdl;
+ if (s->type == CX18_ENC_STREAM_TYPE_MPG)
+ /* byteswap MPG data */
+ cx18_mdl_swap(mdl);
+ else {
+ /* byteswap and process VBI data */
+ cx18_process_vbi_data(cx, mdl, s->type);
+ }
+ return mdl;
+ }
+
+ /* return if end of stream */
+ if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) {
+ CX18_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 */
+ prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE);
+ /* New buffers might have become available before we were added
+ to the waitqueue */
+ if (!atomic_read(&s->q_full.depth))
+ schedule();
+ finish_wait(&s->waitq, &wait);
+ if (signal_pending(current)) {
+ /* return if a signal was received */
+ CX18_DEBUG_INFO("User stopped %s\n", s->name);
+ *err = -EINTR;
+ return NULL;
+ }
+ }
+}
+
+static void cx18_setup_sliced_vbi_mdl(struct cx18 *cx)
+{
+ struct cx18_mdl *mdl = &cx->vbi.sliced_mpeg_mdl;
+ struct cx18_buffer *buf = &cx->vbi.sliced_mpeg_buf;
+ int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES;
+
+ buf->buf = cx->vbi.sliced_mpeg_data[idx];
+ buf->bytesused = cx->vbi.sliced_mpeg_size[idx];
+ buf->readpos = 0;
+
+ mdl->curr_buf = NULL;
+ mdl->bytesused = cx->vbi.sliced_mpeg_size[idx];
+ mdl->readpos = 0;
+}
+
+static size_t cx18_copy_buf_to_user(struct cx18_stream *s,
+ struct cx18_buffer *buf, char __user *ubuf, size_t ucount, bool *stop)
+{
+ struct cx18 *cx = s->cx;
+ size_t len = buf->bytesused - buf->readpos;
+
+ *stop = false;
+ if (len > ucount)
+ len = ucount;
+ if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG &&
+ !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) {
+ /*
+ * Try to find a good splice point in the PS, just before
+ * an MPEG-2 Program Pack start code, and provide only
+ * up to that point to the user, so it's easy to insert VBI data
+ * the next time around.
+ *
+ * This will not work for an MPEG-2 TS and has only been
+ * verified by analysis to work for an MPEG-2 PS. Helen Buus
+ * pointed out this works for the CX23416 MPEG-2 DVD compatible
+ * stream, and research indicates both the MPEG 2 SVCD and DVD
+ * stream types use an MPEG-2 PS container.
+ */
+ /*
+ * An MPEG-2 Program Stream (PS) is a series of
+ * MPEG-2 Program Packs terminated by an
+ * MPEG Program End Code after the last Program Pack.
+ * A Program Pack may hold a PS System Header packet and any
+ * number of Program Elementary Stream (PES) Packets
+ */
+ const char *start = buf->buf + buf->readpos;
+ const char *p = start + 1;
+ const u8 *q;
+ u8 ch = cx->search_pack_header ? 0xba : 0xe0;
+ int stuffing, i;
+
+ while (start + len > p) {
+ /* Scan for a 0 to find a potential MPEG-2 start code */
+ q = memchr(p, 0, start + len - p);
+ if (q == NULL)
+ break;
+ p = q + 1;
+ /*
+ * Keep looking if not a
+ * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba
+ * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0
+ */
+ if ((char *)q + 15 >= buf->buf + buf->bytesused ||
+ q[1] != 0 || q[2] != 1 || q[3] != ch)
+ continue;
+
+ /* If expecting the primary video PES */
+ if (!cx->search_pack_header) {
+ /* Continue if it couldn't be a PES packet */
+ if ((q[6] & 0xc0) != 0x80)
+ continue;
+ /* Check if a PTS or PTS & DTS follow */
+ if (((q[7] & 0xc0) == 0x80 && /* PTS only */
+ (q[9] & 0xf0) == 0x20) || /* PTS only */
+ ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */
+ (q[9] & 0xf0) == 0x30)) { /* DTS follows */
+ /* Assume we found the video PES hdr */
+ ch = 0xba; /* next want a Program Pack*/
+ cx->search_pack_header = 1;
+ p = q + 9; /* Skip this video PES hdr */
+ }
+ continue;
+ }
+
+ /* We may have found a Program Pack start code */
+
+ /* Get the count of stuffing bytes & verify them */
+ 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 && /* right number of stuffing bytes*/
+ (q[4] & 0xc4) == 0x44 && /* marker check */
+ (q[12] & 3) == 3 && /* marker check */
+ q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */
+ q[15 + stuffing] == 0 &&
+ q[16 + stuffing] == 1) {
+ /* We declare we actually found a Program Pack*/
+ cx->search_pack_header = 0; /* expect vid PES */
+ len = (char *)q - start;
+ cx18_setup_sliced_vbi_mdl(cx);
+ *stop = true;
+ break;
+ }
+ }
+ }
+ if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) {
+ CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n",
+ len, s->name);
+ return -EFAULT;
+ }
+ buf->readpos += len;
+ if (s->type == CX18_ENC_STREAM_TYPE_MPG &&
+ buf != &cx->vbi.sliced_mpeg_buf)
+ cx->mpg_data_received += len;
+ return len;
+}
+
+static size_t cx18_copy_mdl_to_user(struct cx18_stream *s,
+ struct cx18_mdl *mdl, char __user *ubuf, size_t ucount)
+{
+ size_t tot_written = 0;
+ int rc;
+ bool stop = false;
+
+ if (mdl->curr_buf == NULL)
+ mdl->curr_buf = list_first_entry(&mdl->buf_list,
+ struct cx18_buffer, list);
+
+ if (list_entry_is_past_end(mdl->curr_buf, &mdl->buf_list, list)) {
+ /*
+ * For some reason we've exhausted the buffers, but the MDL
+ * object still said some data was unread.
+ * Fix that and bail out.
+ */
+ mdl->readpos = mdl->bytesused;
+ return 0;
+ }
+
+ list_for_each_entry_from(mdl->curr_buf, &mdl->buf_list, list) {
+
+ if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused)
+ continue;
+
+ rc = cx18_copy_buf_to_user(s, mdl->curr_buf, ubuf + tot_written,
+ ucount - tot_written, &stop);
+ if (rc < 0)
+ return rc;
+ mdl->readpos += rc;
+ tot_written += rc;
+
+ if (stop || /* Forced stopping point for VBI insertion */
+ tot_written >= ucount || /* Reader request statisfied */
+ mdl->curr_buf->readpos < mdl->curr_buf->bytesused ||
+ mdl->readpos >= mdl->bytesused) /* MDL buffers drained */
+ break;
+ }
+ return tot_written;
+}
+
+static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf,
+ size_t tot_count, int non_block)
+{
+ struct cx18 *cx = s->cx;
+ size_t tot_written = 0;
+ int single_frame = 0;
+
+ if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) {
+ /* shouldn't happen */
+ CX18_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 == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx))
+ single_frame = 1;
+
+ for (;;) {
+ struct cx18_mdl *mdl;
+ int rc;
+
+ mdl = cx18_get_mdl(s, non_block, &rc);
+ /* if there is no data available... */
+ if (mdl == NULL) {
+ /* if we got data, then return that regardless */
+ if (tot_written)
+ break;
+ /* EOS condition */
+ if (rc == 0) {
+ clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
+ clear_bit(CX18_F_S_APPL_IO, &s->s_flags);
+ cx18_release_stream(s);
+ }
+ /* set errno */
+ return rc;
+ }
+
+ rc = cx18_copy_mdl_to_user(s, mdl, ubuf + tot_written,
+ tot_count - tot_written);
+
+ if (mdl != &cx->vbi.sliced_mpeg_mdl) {
+ if (mdl->readpos == mdl->bytesused)
+ cx18_stream_put_mdl_fw(s, mdl);
+ else
+ cx18_push(s, mdl, &s->q_full);
+ } else if (mdl->readpos == mdl->bytesused) {
+ int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES;
+
+ cx->vbi.sliced_mpeg_size[idx] = 0;
+ cx->vbi.inserted_frame++;
+ cx->vbi_data_inserted += mdl->bytesused;
+ }
+ if (rc < 0)
+ return rc;
+ tot_written += rc;
+
+ if (tot_written == tot_count || single_frame)
+ break;
+ }
+ return tot_written;
+}
+
+static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf,
+ size_t count, loff_t *pos, int non_block)
+{
+ ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0;
+ struct cx18 *cx = s->cx;
+
+ CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
+ if (rc > 0)
+ pos += rc;
+ return rc;
+}
+
+int cx18_start_capture(struct cx18_open_id *id)
+{
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+ struct cx18_stream *s_vbi;
+ struct cx18_stream *s_idx;
+
+ if (s->type == CX18_ENC_STREAM_TYPE_RAD) {
+ /* you cannot read from these stream types. */
+ return -EPERM;
+ }
+
+ /* Try to claim this stream. */
+ if (cx18_claim_stream(id, s->type))
+ return -EBUSY;
+
+ /* If capture is already in progress, then we also have to
+ do nothing extra. */
+ if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) ||
+ test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) {
+ set_bit(CX18_F_S_APPL_IO, &s->s_flags);
+ return 0;
+ }
+
+ /* Start associated VBI or IDX stream capture if required */
+ s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
+ s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
+ if (s->type == CX18_ENC_STREAM_TYPE_MPG) {
+ /*
+ * The VBI and IDX streams should have been claimed
+ * automatically, if for internal use, when the MPG stream was
+ * claimed. We only need to start these streams capturing.
+ */
+ if (test_bit(CX18_F_S_INTERNAL_USE, &s_idx->s_flags) &&
+ !test_and_set_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) {
+ if (cx18_start_v4l2_encode_stream(s_idx)) {
+ CX18_DEBUG_WARN("IDX capture start failed\n");
+ clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags);
+ goto start_failed;
+ }
+ CX18_DEBUG_INFO("IDX capture started\n");
+ }
+ if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) &&
+ !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) {
+ if (cx18_start_v4l2_encode_stream(s_vbi)) {
+ CX18_DEBUG_WARN("VBI capture start failed\n");
+ clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags);
+ goto start_failed;
+ }
+ CX18_DEBUG_INFO("VBI insertion started\n");
+ }
+ }
+
+ /* Tell the card to start capturing */
+ if (!cx18_start_v4l2_encode_stream(s)) {
+ /* We're done */
+ set_bit(CX18_F_S_APPL_IO, &s->s_flags);
+ /* Resume a possibly paused encoder */
+ if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags))
+ cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle);
+ return 0;
+ }
+
+start_failed:
+ CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name);
+
+ /*
+ * The associated VBI and IDX streams for internal use are released
+ * automatically when the MPG stream is released. We only need to stop
+ * the associated stream.
+ */
+ if (s->type == CX18_ENC_STREAM_TYPE_MPG) {
+ /* Stop the IDX stream which is always for internal use */
+ if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) {
+ cx18_stop_v4l2_encode_stream(s_idx, 0);
+ clear_bit(CX18_F_S_STREAMING, &s_idx->s_flags);
+ }
+ /* Stop the VBI stream, if only running for internal use */
+ if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) &&
+ !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) {
+ cx18_stop_v4l2_encode_stream(s_vbi, 0);
+ clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags);
+ }
+ }
+ clear_bit(CX18_F_S_STREAMING, &s->s_flags);
+ cx18_release_stream(s); /* Also releases associated streams */
+ return -EIO;
+}
+
+ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *pos)
+{
+ struct cx18_open_id *id = file2id(filp);
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+ int rc;
+
+ CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
+
+ mutex_lock(&cx->serialize_lock);
+ rc = cx18_start_capture(id);
+ mutex_unlock(&cx->serialize_lock);
+ if (rc)
+ return rc;
+
+ if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
+ (id->type == CX18_ENC_STREAM_TYPE_YUV)) {
+ return videobuf_read_stream(&s->vbuf_q, buf, count, pos, 0,
+ filp->f_flags & O_NONBLOCK);
+ }
+
+ return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
+}
+
+__poll_t cx18_v4l2_enc_poll(struct file *filp, poll_table *wait)
+{
+ __poll_t req_events = poll_requested_events(wait);
+ struct cx18_open_id *id = file2id(filp);
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+ int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags);
+ __poll_t res = 0;
+
+ /* Start a capture if there is none */
+ if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags) &&
+ (req_events & (EPOLLIN | EPOLLRDNORM))) {
+ int rc;
+
+ mutex_lock(&cx->serialize_lock);
+ rc = cx18_start_capture(id);
+ mutex_unlock(&cx->serialize_lock);
+ if (rc) {
+ CX18_DEBUG_INFO("Could not start capture for %s (%d)\n",
+ s->name, rc);
+ return EPOLLERR;
+ }
+ CX18_DEBUG_FILE("Encoder poll started capture\n");
+ }
+
+ if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
+ (id->type == CX18_ENC_STREAM_TYPE_YUV)) {
+ __poll_t videobuf_poll = videobuf_poll_stream(filp, &s->vbuf_q, wait);
+
+ if (v4l2_event_pending(&id->fh))
+ res |= EPOLLPRI;
+ if (eof && videobuf_poll == EPOLLERR)
+ return res | EPOLLHUP;
+ return res | videobuf_poll;
+ }
+
+ /* add stream's waitq to the poll list */
+ CX18_DEBUG_HI_FILE("Encoder poll\n");
+ if (v4l2_event_pending(&id->fh))
+ res |= EPOLLPRI;
+ else
+ poll_wait(filp, &s->waitq, wait);
+
+ if (atomic_read(&s->q_full.depth))
+ return res | EPOLLIN | EPOLLRDNORM;
+ if (eof)
+ return res | EPOLLHUP;
+ return res;
+}
+
+int cx18_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct cx18_open_id *id = file->private_data;
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+ int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags);
+
+ if ((s->vb_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
+ (id->type == CX18_ENC_STREAM_TYPE_YUV)) {
+
+ /* Start a capture if there is none */
+ if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) {
+ int rc;
+
+ mutex_lock(&cx->serialize_lock);
+ rc = cx18_start_capture(id);
+ mutex_unlock(&cx->serialize_lock);
+ if (rc) {
+ CX18_DEBUG_INFO(
+ "Could not start capture for %s (%d)\n",
+ s->name, rc);
+ return -EINVAL;
+ }
+ CX18_DEBUG_FILE("Encoder mmap started capture\n");
+ }
+
+ return videobuf_mmap_mapper(&s->vbuf_q, vma);
+ }
+
+ return -EINVAL;
+}
+
+void cx18_vb_timeout(struct timer_list *t)
+{
+ struct cx18_stream *s = from_timer(s, t, vb_timeout);
+ struct cx18_videobuf_buffer *buf;
+ unsigned long flags;
+
+ /* Return all of the buffers in error state, so the vbi/vid inode
+ * can return from blocking.
+ */
+ spin_lock_irqsave(&s->vb_lock, flags);
+ while (!list_empty(&s->vb_capture)) {
+ buf = list_entry(s->vb_capture.next,
+ struct cx18_videobuf_buffer, vb.queue);
+ list_del(&buf->vb.queue);
+ buf->vb.state = VIDEOBUF_ERROR;
+ wake_up(&buf->vb.done);
+ }
+ spin_unlock_irqrestore(&s->vb_lock, flags);
+}
+
+void cx18_stop_capture(struct cx18_open_id *id, int gop_end)
+{
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+ struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
+ struct cx18_stream *s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
+
+ CX18_DEBUG_IOCTL("close() of %s\n", s->name);
+
+ /* 'Unclaim' this stream */
+
+ /* Stop capturing */
+ if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) {
+ CX18_DEBUG_INFO("close stopping capture\n");
+ if (id->type == CX18_ENC_STREAM_TYPE_MPG) {
+ /* Stop internal use associated VBI and IDX streams */
+ if (test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) &&
+ !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) {
+ CX18_DEBUG_INFO("close stopping embedded VBI capture\n");
+ cx18_stop_v4l2_encode_stream(s_vbi, 0);
+ }
+ if (test_bit(CX18_F_S_STREAMING, &s_idx->s_flags)) {
+ CX18_DEBUG_INFO("close stopping IDX capture\n");
+ cx18_stop_v4l2_encode_stream(s_idx, 0);
+ }
+ }
+ if (id->type == CX18_ENC_STREAM_TYPE_VBI &&
+ test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags))
+ /* Also used internally, don't stop capturing */
+ s->id = -1;
+ else
+ cx18_stop_v4l2_encode_stream(s, gop_end);
+ }
+ if (!gop_end) {
+ clear_bit(CX18_F_S_APPL_IO, &s->s_flags);
+ clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
+ cx18_release_stream(s);
+ }
+}
+
+int cx18_v4l2_close(struct file *filp)
+{
+ struct v4l2_fh *fh = filp->private_data;
+ struct cx18_open_id *id = fh2id(fh);
+ struct cx18 *cx = id->cx;
+ struct cx18_stream *s = &cx->streams[id->type];
+
+ CX18_DEBUG_IOCTL("close() of %s\n", s->name);
+
+ mutex_lock(&cx->serialize_lock);
+ /* Stop radio */
+ if (id->type == CX18_ENC_STREAM_TYPE_RAD &&
+ v4l2_fh_is_singular_file(filp)) {
+ /* Closing radio device, return to TV mode */
+ cx18_mute(cx);
+ /* Mark that the radio is no longer in use */
+ clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags);
+ /* Switch tuner to TV */
+ cx18_call_all(cx, video, s_std, cx->std);
+ /* Select correct audio input (i.e. TV tuner or Line in) */
+ cx18_audio_set_io(cx);
+ if (atomic_read(&cx->ana_capturing) > 0) {
+ /* Undo video mute */
+ cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
+ (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute) |
+ (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8)));
+ }
+ /* Done! Unmute and continue. */
+ cx18_unmute(cx);
+ }
+
+ v4l2_fh_del(fh);
+ v4l2_fh_exit(fh);
+
+ /* 'Unclaim' this stream */
+ if (s->id == id->open_id)
+ cx18_stop_capture(id, 0);
+ kfree(id);
+ mutex_unlock(&cx->serialize_lock);
+ return 0;
+}
+
+static int cx18_serialized_open(struct cx18_stream *s, struct file *filp)
+{
+ struct cx18 *cx = s->cx;
+ struct cx18_open_id *item;
+
+ CX18_DEBUG_FILE("open %s\n", s->name);
+
+ /* Allocate memory */
+ item = kzalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
+ if (NULL == item) {
+ CX18_DEBUG_WARN("nomem on v4l2 open\n");
+ return -ENOMEM;
+ }
+ v4l2_fh_init(&item->fh, &s->video_dev);
+
+ item->cx = cx;
+ item->type = s->type;
+
+ item->open_id = cx->open_id++;
+ filp->private_data = &item->fh;
+ v4l2_fh_add(&item->fh);
+
+ if (item->type == CX18_ENC_STREAM_TYPE_RAD &&
+ v4l2_fh_is_singular_file(filp)) {
+ if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) {
+ if (atomic_read(&cx->ana_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(CX18_F_I_RADIO_USER, &cx->i_flags);
+ /* We have the radio */
+ cx18_mute(cx);
+ /* Switch tuner to radio */
+ cx18_call_all(cx, tuner, s_radio);
+ /* Select the correct audio input (i.e. radio tuner) */
+ cx18_audio_set_io(cx);
+ /* Done! Unmute and continue. */
+ cx18_unmute(cx);
+ }
+ return 0;
+}
+
+int cx18_v4l2_open(struct file *filp)
+{
+ int res;
+ struct video_device *video_dev = video_devdata(filp);
+ struct cx18_stream *s = video_get_drvdata(video_dev);
+ struct cx18 *cx = s->cx;
+
+ mutex_lock(&cx->serialize_lock);
+ if (cx18_init_on_first_open(cx)) {
+ CX18_ERR("Failed to initialize on %s\n",
+ video_device_node_name(video_dev));
+ mutex_unlock(&cx->serialize_lock);
+ return -ENXIO;
+ }
+ res = cx18_serialized_open(s, filp);
+ mutex_unlock(&cx->serialize_lock);
+ return res;
+}
+
+void cx18_mute(struct cx18 *cx)
+{
+ u32 h;
+ if (atomic_read(&cx->ana_capturing)) {
+ h = cx18_find_handle(cx);
+ if (h != CX18_INVALID_TASK_HANDLE)
+ cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1);
+ else
+ CX18_ERR("Can't find valid task handle for mute\n");
+ }
+ CX18_DEBUG_INFO("Mute\n");
+}
+
+void cx18_unmute(struct cx18 *cx)
+{
+ u32 h;
+ if (atomic_read(&cx->ana_capturing)) {
+ h = cx18_find_handle(cx);
+ if (h != CX18_INVALID_TASK_HANDLE) {
+ cx18_msleep_timeout(100, 0);
+ cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12);
+ cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0);
+ } else
+ CX18_ERR("Can't find valid task handle for unmute\n");
+ }
+ CX18_DEBUG_INFO("Unmute\n");
+}