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ASoC: WM8995: Add regulator handling code
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Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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Dimitris Papastamos authored and Mark Brown committed Jan 17, 2011
1 parent a1b3b5e commit 219d8df
Showing 1 changed file with 97 additions and 5 deletions.
102 changes: 97 additions & 5 deletions sound/soc/codecs/wm8995.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
Expand All @@ -30,6 +31,18 @@

#include "wm8995.h"

#define WM8995_NUM_SUPPLIES 8
static const char *wm8995_supply_names[WM8995_NUM_SUPPLIES] = {
"DCVDD",
"DBVDD1",
"DBVDD2",
"DBVDD3",
"AVDD1",
"AVDD2",
"CPVDD",
"MICVDD"
};

static const u16 wm8995_reg_defs[WM8995_MAX_REGISTER + 1] = {
[0] = 0x8995, [5] = 0x0100, [16] = 0x000b, [17] = 0x000b,
[24] = 0x02c0, [25] = 0x02c0, [26] = 0x02c0, [27] = 0x02c0,
Expand Down Expand Up @@ -126,8 +139,37 @@ struct wm8995_priv {
int mclk[2];
int aifclk[2];
struct fll_config fll[2], fll_suspend[2];
struct regulator_bulk_data supplies[WM8995_NUM_SUPPLIES];
struct notifier_block disable_nb[WM8995_NUM_SUPPLIES];
struct snd_soc_codec *codec;
};

/*
* We can't use the same notifier block for more than one supply and
* there's no way I can see to get from a callback to the caller
* except container_of().
*/
#define WM8995_REGULATOR_EVENT(n) \
static int wm8995_regulator_event_##n(struct notifier_block *nb, \
unsigned long event, void *data) \
{ \
struct wm8995_priv *wm8995 = container_of(nb, struct wm8995_priv, \
disable_nb[n]); \
if (event & REGULATOR_EVENT_DISABLE) { \
wm8995->codec->cache_sync = 1; \
} \
return 0; \
}

WM8995_REGULATOR_EVENT(0)
WM8995_REGULATOR_EVENT(1)
WM8995_REGULATOR_EVENT(2)
WM8995_REGULATOR_EVENT(3)
WM8995_REGULATOR_EVENT(4)
WM8995_REGULATOR_EVENT(5)
WM8995_REGULATOR_EVENT(6)
WM8995_REGULATOR_EVENT(7)

static const DECLARE_TLV_DB_SCALE(digital_tlv, -7200, 75, 1);
static const DECLARE_TLV_DB_SCALE(in1lr_pga_tlv, -1650, 150, 0);
static const DECLARE_TLV_DB_SCALE(in1l_boost_tlv, 0, 600, 0);
Expand Down Expand Up @@ -1483,6 +1525,11 @@ static int wm8995_set_bias_level(struct snd_soc_codec *codec,
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8995->supplies),
wm8995->supplies);
if (ret)
return ret;

ret = snd_soc_cache_sync(codec);
if (ret) {
dev_err(codec->dev,
Expand All @@ -1492,13 +1539,13 @@ static int wm8995_set_bias_level(struct snd_soc_codec *codec,

snd_soc_update_bits(codec, WM8995_POWER_MANAGEMENT_1,
WM8995_BG_ENA_MASK, WM8995_BG_ENA);

}
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, WM8995_POWER_MANAGEMENT_1,
WM8995_BG_ENA_MASK, 0);
codec->cache_sync = 1;
regulator_bulk_disable(ARRAY_SIZE(wm8995->supplies),
wm8995->supplies);
break;
}

Expand Down Expand Up @@ -1537,32 +1584,71 @@ static int wm8995_remove(struct snd_soc_codec *codec)
static int wm8995_probe(struct snd_soc_codec *codec)
{
struct wm8995_priv *wm8995;
int i;
int ret;

codec->dapm.idle_bias_off = 1;
wm8995 = snd_soc_codec_get_drvdata(codec);
wm8995->codec = codec;

ret = snd_soc_codec_set_cache_io(codec, 16, 16, wm8995->control_type);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret);
return ret;
}

for (i = 0; i < ARRAY_SIZE(wm8995->supplies); i++)
wm8995->supplies[i].supply = wm8995_supply_names[i];

ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8995->supplies),
wm8995->supplies);
if (ret) {
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
return ret;
}

wm8995->disable_nb[0].notifier_call = wm8995_regulator_event_0;
wm8995->disable_nb[1].notifier_call = wm8995_regulator_event_1;
wm8995->disable_nb[2].notifier_call = wm8995_regulator_event_2;
wm8995->disable_nb[3].notifier_call = wm8995_regulator_event_3;
wm8995->disable_nb[4].notifier_call = wm8995_regulator_event_4;
wm8995->disable_nb[5].notifier_call = wm8995_regulator_event_5;
wm8995->disable_nb[6].notifier_call = wm8995_regulator_event_6;
wm8995->disable_nb[7].notifier_call = wm8995_regulator_event_7;

/* This should really be moved into the regulator core */
for (i = 0; i < ARRAY_SIZE(wm8995->supplies); i++) {
ret = regulator_register_notifier(wm8995->supplies[i].consumer,
&wm8995->disable_nb[i]);
if (ret) {
dev_err(codec->dev,
"Failed to register regulator notifier: %d\n",
ret);
}
}

ret = regulator_bulk_enable(ARRAY_SIZE(wm8995->supplies),
wm8995->supplies);
if (ret) {
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
goto err_reg_get;
}

ret = snd_soc_read(codec, WM8995_SOFTWARE_RESET);
if (ret < 0) {
dev_err(codec->dev, "Failed to read device ID: %d\n", ret);
return ret;
goto err_reg_enable;
}

if (ret != 0x8995) {
dev_err(codec->dev, "Invalid device ID: %#x\n", ret);
return -EINVAL;
goto err_reg_enable;
}

ret = snd_soc_write(codec, WM8995_SOFTWARE_RESET, 0);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
return ret;
goto err_reg_enable;
}

wm8995_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
Expand Down Expand Up @@ -1597,6 +1683,12 @@ static int wm8995_probe(struct snd_soc_codec *codec)
ARRAY_SIZE(wm8995_intercon));

return 0;

err_reg_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8995->supplies), wm8995->supplies);
err_reg_get:
regulator_bulk_free(ARRAY_SIZE(wm8995->supplies), wm8995->supplies);
return ret;
}

#define WM8995_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
Expand Down

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