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Diffstat (limited to 'drivers/media/video/cx25840/cx25840-audio.c')
-rw-r--r--drivers/media/video/cx25840/cx25840-audio.c75
1 files changed, 42 insertions, 33 deletions
diff --git a/drivers/media/video/cx25840/cx25840-audio.c b/drivers/media/video/cx25840/cx25840-audio.c
index f897c1ebd5f..3d46a776df3 100644
--- a/drivers/media/video/cx25840/cx25840-audio.c
+++ b/drivers/media/video/cx25840/cx25840-audio.c
@@ -157,13 +157,12 @@ void cx25840_audio_set_path(struct i2c_client *client)
{
struct cx25840_state *state = i2c_get_clientdata(client);
+ /* assert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x01);
+
/* stop microcontroller */
cx25840_and_or(client, 0x803, ~0x10, 0);
- /* assert soft reset */
- if (!state->is_cx25836)
- cx25840_and_or(client, 0x810, ~0x1, 0x01);
-
/* Mute everything to prevent the PFFT! */
cx25840_write(client, 0x8d3, 0x1f);
@@ -181,32 +180,46 @@ void cx25840_audio_set_path(struct i2c_client *client)
set_audclk_freq(client, state->audclk_freq);
- /* deassert soft reset */
- if (!state->is_cx25836)
- cx25840_and_or(client, 0x810, ~0x1, 0x00);
-
if (state->aud_input != CX25840_AUDIO_SERIAL) {
/* When the microcontroller detects the
* audio format, it will unmute the lines */
cx25840_and_or(client, 0x803, ~0x10, 0x10);
}
+
+ /* deassert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x00);
}
static int get_volume(struct i2c_client *client)
{
+ struct cx25840_state *state = i2c_get_clientdata(client);
+ int vol;
+
+ if (state->unmute_volume >= 0)
+ return state->unmute_volume;
+
/* Volume runs +18dB to -96dB in 1/2dB steps
* change to fit the msp3400 -114dB to +12dB range */
/* check PATH1_VOLUME */
- int vol = 228 - cx25840_read(client, 0x8d4);
+ vol = 228 - cx25840_read(client, 0x8d4);
vol = (vol / 2) + 23;
return vol << 9;
}
static void set_volume(struct i2c_client *client, int volume)
{
- /* First convert the volume to msp3400 values (0-127) */
- int vol = volume >> 9;
+ struct cx25840_state *state = i2c_get_clientdata(client);
+ int vol;
+
+ if (state->unmute_volume >= 0) {
+ state->unmute_volume = volume;
+ return;
+ }
+
+ /* Convert the volume to msp3400 values (0-127) */
+ vol = volume >> 9;
+
/* now scale it up to cx25840 values
* -114dB to -96dB maps to 0
* this should be 19, but in my testing that was 4dB too loud */
@@ -284,30 +297,26 @@ static void set_balance(struct i2c_client *client, int balance)
static int get_mute(struct i2c_client *client)
{
- /* check SRC1_MUTE_EN */
- return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
+ struct cx25840_state *state = i2c_get_clientdata(client);
+
+ return state->unmute_volume >= 0;
}
static void set_mute(struct i2c_client *client, int mute)
{
struct cx25840_state *state = i2c_get_clientdata(client);
- if (state->aud_input != CX25840_AUDIO_SERIAL) {
- /* Must turn off microcontroller in order to mute sound.
- * Not sure if this is the best method, but it does work.
- * If the microcontroller is running, then it will undo any
- * changes to the mute register. */
- if (mute) {
- /* disable microcontroller */
- cx25840_and_or(client, 0x803, ~0x10, 0x00);
- cx25840_write(client, 0x8d3, 0x1f);
- } else {
- /* enable microcontroller */
- cx25840_and_or(client, 0x803, ~0x10, 0x10);
- }
- } else {
- /* SRC1_MUTE_EN */
- cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
+ if (mute && state->unmute_volume == -1) {
+ int vol = get_volume(client);
+
+ set_volume(client, 0);
+ state->unmute_volume = vol;
+ }
+ else if (!mute && state->unmute_volume != -1) {
+ int vol = state->unmute_volume;
+
+ state->unmute_volume = -1;
+ set_volume(client, vol);
}
}
@@ -319,18 +328,18 @@ int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
switch (cmd) {
case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+ if (!state->is_cx25836)
+ cx25840_and_or(client, 0x810, ~0x1, 1);
if (state->aud_input != CX25840_AUDIO_SERIAL) {
cx25840_and_or(client, 0x803, ~0x10, 0);
cx25840_write(client, 0x8d3, 0x1f);
}
- if (!state->is_cx25836)
- cx25840_and_or(client, 0x810, ~0x1, 1);
retval = set_audclk_freq(client, *(u32 *)arg);
- if (!state->is_cx25836)
- cx25840_and_or(client, 0x810, ~0x1, 0);
if (state->aud_input != CX25840_AUDIO_SERIAL) {
cx25840_and_or(client, 0x803, ~0x10, 0x10);
}
+ if (!state->is_cx25836)
+ cx25840_and_or(client, 0x810, ~0x1, 0);
return retval;
case VIDIOC_G_CTRL: