diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-03-15 18:14:34 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-03-16 15:56:54 (GMT) |
| commit | 37f88e8407f75fc6ced5cefb633c314556de3ad1 (patch) | |
| tree | 95b4bd8d967f4c229becaad4b5dc503be6f46448 /sound/soc/codecs | |
| parent | 73b34ead7429789f35eea147a3e185abd61c7d94 (diff) | |
| download | linux-37f88e8407f75fc6ced5cefb633c314556de3ad1.tar.xz | |
ASoC: Initial WM8903 microphone bias and short detection
Provide support for WM8903 microphone presence and short detection
using the GPIOs to route out a logic signal suitable for handling
using snd_soc_jack_add_gpios() on the processor GPIOs.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/wm8903.c | 24 | ||||
| -rw-r--r-- | sound/soc/codecs/wm8903.h | 22 |
2 files changed, 16 insertions, 30 deletions
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 36952d7..467e6c33 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -11,7 +11,6 @@ * * TODO: * - TDM mode configuration. - * - Mic detect. * - Digital microphone support. * - Interrupt support (mic detect and sequencer). */ @@ -246,10 +245,10 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start) BUG_ON(start > 48); - /* Enable the sequencer */ + /* Enable the sequencer if it's not already on */ reg[0] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_0); - reg[0] |= WM8903_WSEQ_ENA; - snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]); + snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, + reg[0] | WM8903_WSEQ_ENA); dev_dbg(&i2c->dev, "Starting sequence at %d\n", start); @@ -268,9 +267,8 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start) dev_dbg(&i2c->dev, "Sequence complete\n"); - /* Disable the sequencer again */ - snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, - reg[0] & ~WM8903_WSEQ_ENA); + /* Disable the sequencer again if we enabled it */ + snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]); return 0; } @@ -1578,7 +1576,7 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, wm8903_reset(codec); - /* Set up GPIOs */ + /* Set up GPIOs and microphone detection */ if (pdata) { for (i = 0; i < ARRAY_SIZE(pdata->gpio_cfg); i++) { if (!pdata->gpio_cfg[i]) @@ -1587,6 +1585,16 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, snd_soc_write(codec, WM8903_GPIO_CONTROL_1 + i, pdata->gpio_cfg[i] & 0xffff); } + + snd_soc_write(codec, WM8903_MIC_BIAS_CONTROL_0, + pdata->micdet_cfg); + + /* Microphone detection needs the WSEQ clock */ + if (pdata->micdet_cfg) + snd_soc_update_bits(codec, WM8903_WRITE_SEQUENCER_0, + WM8903_WSEQ_ENA, WM8903_WSEQ_ENA); + + wm8903->mic_delay = pdata->micdet_delay; } /* power on device */ diff --git a/sound/soc/codecs/wm8903.h b/sound/soc/codecs/wm8903.h index 551736c..8f19a24 100644 --- a/sound/soc/codecs/wm8903.h +++ b/sound/soc/codecs/wm8903.h @@ -173,28 +173,6 @@ extern struct snd_soc_codec_device soc_codec_dev_wm8903; #define WM8903_VMID_RES_5K 4 /* - * R6 (0x06) - Mic Bias Control 0 - */ -#define WM8903_MICDET_HYST_ENA 0x0080 /* MICDET_HYST_ENA */ -#define WM8903_MICDET_HYST_ENA_MASK 0x0080 /* MICDET_HYST_ENA */ -#define WM8903_MICDET_HYST_ENA_SHIFT 7 /* MICDET_HYST_ENA */ -#define WM8903_MICDET_HYST_ENA_WIDTH 1 /* MICDET_HYST_ENA */ -#define WM8903_MICDET_THR_MASK 0x0070 /* MICDET_THR - [6:4] */ -#define WM8903_MICDET_THR_SHIFT 4 /* MICDET_THR - [6:4] */ -#define WM8903_MICDET_THR_WIDTH 3 /* MICDET_THR - [6:4] */ -#define WM8903_MICSHORT_THR_MASK 0x000C /* MICSHORT_THR - [3:2] */ -#define WM8903_MICSHORT_THR_SHIFT 2 /* MICSHORT_THR - [3:2] */ -#define WM8903_MICSHORT_THR_WIDTH 2 /* MICSHORT_THR - [3:2] */ -#define WM8903_MICDET_ENA 0x0002 /* MICDET_ENA */ -#define WM8903_MICDET_ENA_MASK 0x0002 /* MICDET_ENA */ -#define WM8903_MICDET_ENA_SHIFT 1 /* MICDET_ENA */ -#define WM8903_MICDET_ENA_WIDTH 1 /* MICDET_ENA */ -#define WM8903_MICBIAS_ENA 0x0001 /* MICBIAS_ENA */ -#define WM8903_MICBIAS_ENA_MASK 0x0001 /* MICBIAS_ENA */ -#define WM8903_MICBIAS_ENA_SHIFT 0 /* MICBIAS_ENA */ -#define WM8903_MICBIAS_ENA_WIDTH 1 /* MICBIAS_ENA */ - -/* * R8 (0x08) - Analogue DAC 0 */ #define WM8903_DACBIAS_SEL_MASK 0x0018 /* DACBIAS_SEL - [4:3] */ |