diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-fileops.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-fileops.c | 721 |
1 files changed, 0 insertions, 721 deletions
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c deleted file mode 100644 index 055f6e004b2..00000000000 --- a/drivers/media/video/cx18/cx18-fileops.c +++ /dev/null @@ -1,721 +0,0 @@ -/* - * cx18 file operation functions - * - * Derived from ivtv-fileops.c - * - * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> - * Copyright (C) 2008 Andy Walls <awalls@radix.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. - * - * 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 "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" - -/* 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. */ -static 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_vbi; - int vbi_type; - - 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 - (provided VBI insertion is on and sliced VBI is selected), for all - other streams we're done */ - if (type == CX18_ENC_STREAM_TYPE_MPG && - cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) { - vbi_type = CX18_ENC_STREAM_TYPE_VBI; - } else { - return 0; - } - s_vbi = &cx->streams[vbi_type]; - - set_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags); - - /* mark that it is used internally */ - set_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags); - return 0; -} - -/* This function releases a previously claimed stream. It will take into - account associated VBI streams. */ -static void cx18_release_stream(struct cx18_stream *s) -{ - struct cx18 *cx = s->cx; - struct cx18_stream *s_vbi; - - s->id = -1; - 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 CX18_ENC_STREAM_TYPE_VBI, - for all other streams we're done */ - if (s->type == CX18_ENC_STREAM_TYPE_MPG) - s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - else - return; - - /* clear internal use flag */ - if (!test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags)) { - /* was already cleared */ - return; - } - if (s_vbi->id != -1) { - /* VBI stream still claimed by a file descriptor */ - return; - } - clear_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags); - cx18_flush_queues(s_vbi); -} - -static void cx18_dualwatch(struct cx18 *cx) -{ - struct v4l2_tuner vt; - u16 new_bitmap; - u16 new_stereo_mode; - const u16 stereo_mask = 0x0300; - const u16 dual = 0x0200; - u32 h; - - new_stereo_mode = cx->params.audio_properties & stereo_mask; - memset(&vt, 0, sizeof(vt)); - cx18_call_i2c_clients(cx, VIDIOC_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; - - new_bitmap = new_stereo_mode - | (cx->params.audio_properties & ~stereo_mask); - - CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. " - "new audio_bitmask=0x%ux\n", - cx->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); - - h = cx18_find_handle(cx); - if (h == CX18_INVALID_TASK_HANDLE) { - CX18_DEBUG_INFO("dualwatch: can't find valid task handle\n"); - return; - } - - if (cx18_vapi(cx, - CX18_CPU_SET_AUDIO_PARAMETERS, 2, h, new_bitmap) == 0) { - cx->dualwatch_stereo_mode = new_stereo_mode; - return; - } - CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); -} - - -static struct cx18_buffer *cx18_get_buffer(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_buffer *buf; - DEFINE_WAIT(wait); - - *err = 0; - while (1) { - if (s->type == CX18_ENC_STREAM_TYPE_MPG) { - - 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 ((buf = cx18_dequeue(s_vbi, &s_vbi->q_full))) { - /* byteswap and process VBI data */ - cx18_process_vbi_data(cx, buf, - s_vbi->dma_pts, - s_vbi->type); - cx18_stream_put_buf_fw(s_vbi, buf); - } - } - buf = &cx->vbi.sliced_mpeg_buf; - if (buf->readpos != buf->bytesused) - return buf; - } - - /* do we have new data? */ - buf = cx18_dequeue(s, &s->q_full); - if (buf) { - if (!test_and_clear_bit(CX18_F_B_NEED_BUF_SWAP, - &buf->b_flags)) - return buf; - if (s->type == CX18_ENC_STREAM_TYPE_MPG) - /* byteswap MPG data */ - cx18_buf_swap(buf); - else { - /* byteswap and process VBI data */ - cx18_process_vbi_data(cx, buf, - s->dma_pts, s->type); - } - return buf; - } - - /* 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.buffers)) - 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_buf(struct cx18 *cx) -{ - int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; - - cx->vbi.sliced_mpeg_buf.buf = cx->vbi.sliced_mpeg_data[idx]; - cx->vbi.sliced_mpeg_buf.bytesused = cx->vbi.sliced_mpeg_size[idx]; - cx->vbi.sliced_mpeg_buf.readpos = 0; -} - -static size_t cx18_copy_buf_to_user(struct cx18_stream *s, - struct cx18_buffer *buf, char __user *ubuf, size_t ucount) -{ - struct cx18 *cx = s->cx; - size_t len = buf->bytesused - buf->readpos; - - 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) { - 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) { - q = memchr(p, 0, start + len - p); - if (q == NULL) - break; - p = q + 1; - if ((char *)q + 15 >= buf->buf + buf->bytesused || - q[1] != 0 || q[2] != 1 || q[3] != ch) - continue; - if (!cx->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; - cx->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) { - cx->search_pack_header = 0; - len = (char *)q - start; - cx18_setup_sliced_vbi_buf(cx); - 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 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_buffer *buf; - int rc; - - buf = cx18_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(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_buf_to_user(s, buf, ubuf + tot_written, - tot_count - tot_written); - - if (buf != &cx->vbi.sliced_mpeg_buf) { - if (buf->readpos == buf->bytesused) - cx18_stream_put_buf_fw(s, buf); - else - cx18_push(s, buf, &s->q_full); - } else if (buf->readpos == buf->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 += buf->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; - - 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 VBI capture if required */ - s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - if (s->type == CX18_ENC_STREAM_TYPE_MPG && - test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && - !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { - /* Note: the CX18_ENC_STREAM_TYPE_VBI is claimed - automatically when the MPG stream is claimed. - We only need to start the VBI capturing. */ - if (cx18_start_v4l2_encode_stream(s_vbi)) { - CX18_DEBUG_WARN("VBI capture start failed\n"); - - /* Failure, clean up and return an error */ - clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); - clear_bit(CX18_F_S_STREAMING, &s->s_flags); - /* also releases the associated VBI stream */ - cx18_release_stream(s); - return -EIO; - } - 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; - } - - /* failure, clean up */ - CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); - - /* Note: the CX18_ENC_STREAM_TYPE_VBI is released - automatically when the MPG stream is released. - We only need to stop the VBI capturing. */ - if (s->type == CX18_ENC_STREAM_TYPE_MPG && - test_bit(CX18_F_S_STREAMING, &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); - return -EIO; -} - -ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, - loff_t *pos) -{ - struct cx18_open_id *id = filp->private_data; - 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; - return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); -} - -unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) -{ - struct cx18_open_id *id = filp->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); - - /* 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 POLLERR; - } - CX18_DEBUG_FILE("Encoder poll started capture\n"); - } - - /* add stream's waitq to the poll list */ - CX18_DEBUG_HI_FILE("Encoder poll\n"); - poll_wait(filp, &s->waitq, wait); - - if (atomic_read(&s->q_full.buffers)) - return POLLIN | POLLRDNORM; - if (eof) - return POLLHUP; - return 0; -} - -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]; - - CX18_DEBUG_IOCTL("close() of %s\n", s->name); - - /* 'Unclaim' this stream */ - - /* Stop capturing */ - if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { - struct cx18_stream *s_vbi = - &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; - - CX18_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 == CX18_ENC_STREAM_TYPE_MPG && - 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 (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 cx18_open_id *id = filp->private_data; - struct cx18 *cx = id->cx; - struct cx18_stream *s = &cx->streams[id->type]; - - CX18_DEBUG_IOCTL("close() of %s\n", s->name); - - v4l2_prio_close(&cx->prio, &id->prio); - - /* Easy case first: this stream was never claimed by us */ - if (s->id != id->open_id) { - kfree(id); - return 0; - } - - /* 'Unclaim' this stream */ - - /* Stop radio */ - mutex_lock(&cx->serialize_lock); - if (id->type == CX18_ENC_STREAM_TYPE_RAD) { - /* 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_i2c_clients(cx, VIDIOC_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, - cx->params.video_mute | - (cx->params.video_mute_yuv << 8)); - } - /* Done! Unmute and continue. */ - cx18_unmute(cx); - cx18_release_stream(s); - } else { - 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 = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL); - if (NULL == item) { - CX18_DEBUG_WARN("nomem on v4l2 open\n"); - return -ENOMEM; - } - item->cx = cx; - item->type = s->type; - v4l2_prio_open(&cx->prio, &item->prio); - - item->open_id = cx->open_id++; - filp->private_data = item; - - if (item->type == CX18_ENC_STREAM_TYPE_RAD) { - /* Try to claim this stream */ - if (cx18_claim_stream(item, item->type)) { - /* No, it's already in use */ - kfree(item); - return -EBUSY; - } - - 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 */ - cx18_release_stream(s); - 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_i2c_clients(cx, AUDC_SET_RADIO, NULL); - /* 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, x, y = 0; - struct cx18 *cx = NULL; - struct cx18_stream *s = NULL; - int minor = video_devdata(filp)->minor; - - /* Find which card this open was on */ - spin_lock(&cx18_cards_lock); - for (x = 0; cx == NULL && x < cx18_cards_active; x++) { - /* find out which stream this open was on */ - for (y = 0; y < CX18_MAX_STREAMS; y++) { - if (cx18_cards[x] == NULL) - continue; - s = &cx18_cards[x]->streams[y]; - if (s->v4l2dev && s->v4l2dev->minor == minor) { - cx = cx18_cards[x]; - break; - } - } - } - spin_unlock(&cx18_cards_lock); - - if (cx == NULL) { - /* Couldn't find a device registered - on that minor, shouldn't happen! */ - printk(KERN_WARNING "No cx18 device found on minor %d\n", - minor); - return -ENXIO; - } - - mutex_lock(&cx->serialize_lock); - if (cx18_init_on_first_open(cx)) { - CX18_ERR("Failed to initialize on minor %d\n", minor); - 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"); -} |