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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-10-07 13:04:58 +0100
committerTakashi Iwai <tiwai@suse.de>2008-10-13 02:17:31 +0200
commit09af98b08f72471ea53efe26494eef0947a6a10d (patch)
tree0645d68d151697d906353d7e23be0c3c206404ac
parent3ab57fbe91994e5d6fb371a34390520c6c905bee (diff)
ALSA: ASoC: Implement WM8510 bias level control
The WM8510 bias level configuration blindly overwrites the power management registers, interfering with the operation of DAPM. Only adjust the specific bits required, implementing use of the VMID resistor string configuration control as we go. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/soc/codecs/wm8510.c32
1 files changed, 24 insertions, 8 deletions
diff --git a/sound/soc/codecs/wm8510.c b/sound/soc/codecs/wm8510.c
index 142c49bf18e6..94cab495d5f3 100644
--- a/sound/soc/codecs/wm8510.c
+++ b/sound/soc/codecs/wm8510.c
@@ -55,6 +55,9 @@ static const u16 wm8510_reg[WM8510_CACHEREGNUM] = {
0x0001,
};
+#define WM8510_POWER1_BIASEN 0x08
+#define WM8510_POWER1_BUFIOEN 0x10
+
/*
* read wm8510 register cache
*/
@@ -526,23 +529,35 @@ static int wm8510_mute(struct snd_soc_dai *dai, int mute)
static int wm8510_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ u16 power1 = wm8510_read_reg_cache(codec, WM8510_POWER1) & ~0x3;
switch (level) {
case SND_SOC_BIAS_ON:
- wm8510_write(codec, WM8510_POWER1, 0x1ff);
- wm8510_write(codec, WM8510_POWER2, 0x1ff);
- wm8510_write(codec, WM8510_POWER3, 0x1ff);
- break;
case SND_SOC_BIAS_PREPARE:
+ power1 |= 0x1; /* VMID 50k */
+ wm8510_write(codec, WM8510_POWER1, power1);
+ break;
+
case SND_SOC_BIAS_STANDBY:
+ power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN;
+
+ if (codec->bias_level == SND_SOC_BIAS_OFF) {
+ /* Initial cap charge at VMID 5k */
+ wm8510_write(codec, WM8510_POWER1, power1 | 0x3);
+ mdelay(100);
+ }
+
+ power1 |= 0x2; /* VMID 500k */
+ wm8510_write(codec, WM8510_POWER1, power1);
break;
+
case SND_SOC_BIAS_OFF:
- /* everything off, dac mute, inactive */
- wm8510_write(codec, WM8510_POWER1, 0x0);
- wm8510_write(codec, WM8510_POWER2, 0x0);
- wm8510_write(codec, WM8510_POWER3, 0x0);
+ wm8510_write(codec, WM8510_POWER1, 0);
+ wm8510_write(codec, WM8510_POWER2, 0);
+ wm8510_write(codec, WM8510_POWER3, 0);
break;
}
+
codec->bias_level = level;
return 0;
}
@@ -640,6 +655,7 @@ static int wm8510_init(struct snd_soc_device *socdev)
}
/* power on device */
+ codec->bias_level = SND_SOC_BIAS_OFF;
wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
wm8510_add_controls(codec);
wm8510_add_widgets(codec);

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