[alsa-devel] [PATCH 1/5] ASoC: wm8903: Move pin configuration into I2C probe() function
Ensure that the device pins are configured as soon as possible by moving the pin configration (including MICBIAS) into the I2C probe() function. This had been done in the CODEC probe() function when we were relying on the ASoC register I/O code.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com ---
This series is untested but should deal with the WM8903 side of what I was saying earlier.
sound/soc/codecs/wm8903.c | 92 +++++++++++++++++++++++---------------------- 1 file changed, 47 insertions(+), 45 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index e76a66d..7200088 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -1,7 +1,7 @@ /* * wm8903.c -- WM8903 ALSA SoC Audio driver * - * Copyright 2008-11 Wolfson Microelectronics + * Copyright 2008-12 Wolfson Microelectronics * Copyright 2011-2012 NVIDIA, Inc. * * Author: Mark Brown broonie@opensource.wolfsonmicro.com @@ -2081,10 +2081,9 @@ static int wm8903_probe(struct snd_soc_codec *codec) { struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); struct wm8903_platform_data *pdata = wm8903->pdata; - int ret, i; + int ret; int trigger, irq_pol; u16 val; - bool mic_gpio = false;
wm8903->codec = codec; codec->control_data = wm8903->regmap; @@ -2095,47 +2094,6 @@ static int wm8903_probe(struct snd_soc_codec *codec) return ret; }
- /* Set up GPIOs, detect if any are MIC detect outputs */ - for (i = 0; i < ARRAY_SIZE(pdata->gpio_cfg); i++) { - if ((!pdata->gpio_cfg[i]) || - (pdata->gpio_cfg[i] > WM8903_GPIO_CONFIG_ZERO)) - continue; - - snd_soc_write(codec, WM8903_GPIO_CONTROL_1 + i, - pdata->gpio_cfg[i] & 0x7fff); - - val = (pdata->gpio_cfg[i] & WM8903_GP1_FN_MASK) - >> WM8903_GP1_FN_SHIFT; - - switch (val) { - case WM8903_GPn_FN_MICBIAS_CURRENT_DETECT: - case WM8903_GPn_FN_MICBIAS_SHORT_DETECT: - mic_gpio = true; - break; - default: - break; - } - } - - /* Set up microphone detection */ - 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); - - /* If microphone detection is enabled by pdata but - * detected via IRQ then interrupts can be lost before - * the machine driver has set up microphone detection - * IRQs as the IRQs are clear on read. The detection - * will be enabled when the machine driver configures. - */ - WARN_ON(!mic_gpio && (pdata->micdet_cfg & WM8903_MICDET_ENA)); - - wm8903->mic_delay = pdata->micdet_delay; - if (wm8903->irq) { if (pdata->irq_active_low) { trigger = IRQF_TRIGGER_LOW; @@ -2316,8 +2274,9 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, { struct wm8903_platform_data *pdata = dev_get_platdata(&i2c->dev); struct wm8903_priv *wm8903; + bool mic_gpio = false; unsigned int val; - int ret; + int ret, i;
wm8903 = devm_kzalloc(&i2c->dev, sizeof(struct wm8903_priv), GFP_KERNEL); @@ -2361,6 +2320,8 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, } }
+ pdata = wm8903->pdata; + ret = regmap_read(wm8903->regmap, WM8903_SW_RESET_AND_ID, &val); if (ret != 0) { dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret); @@ -2385,6 +2346,47 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
wm8903_init_gpio(wm8903);
+ /* Set up GPIO pin state, detect if any are MIC detect outputs */ + for (i = 0; i < ARRAY_SIZE(pdata->gpio_cfg); i++) { + if ((!pdata->gpio_cfg[i]) || + (pdata->gpio_cfg[i] > WM8903_GPIO_CONFIG_ZERO)) + continue; + + regmap_write(wm8903->regmap, WM8903_GPIO_CONTROL_1 + i, + pdata->gpio_cfg[i] & 0x7fff); + + val = (pdata->gpio_cfg[i] & WM8903_GP1_FN_MASK) + >> WM8903_GP1_FN_SHIFT; + + switch (val) { + case WM8903_GPn_FN_MICBIAS_CURRENT_DETECT: + case WM8903_GPn_FN_MICBIAS_SHORT_DETECT: + mic_gpio = true; + break; + default: + break; + } + } + + /* Set up microphone detection */ + regmap_write(wm8903->regmap, WM8903_MIC_BIAS_CONTROL_0, + pdata->micdet_cfg); + + /* Microphone detection needs the WSEQ clock */ + if (pdata->micdet_cfg) + regmap_update_bits(wm8903->regmap, WM8903_WRITE_SEQUENCER_0, + WM8903_WSEQ_ENA, WM8903_WSEQ_ENA); + + /* If microphone detection is enabled by pdata but + * detected via IRQ then interrupts can be lost before + * the machine driver has set up microphone detection + * IRQs as the IRQs are clear on read. The detection + * will be enabled when the machine driver configures. + */ + WARN_ON(!mic_gpio && (pdata->micdet_cfg & WM8903_MICDET_ENA)); + + wm8903->mic_delay = pdata->micdet_delay; + ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8903, &wm8903_dai, 1); if (ret != 0)
There's no urgent need for the interrupt handler to use the ASoC I/O functions and it'll support a further move in where we request the interrupt so call the regmap APIs directly.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8903.c | 48 ++++++++++++++++++++++++++++++--------------- 1 file changed, 32 insertions(+), 16 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 7200088..8fe9b78 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -1830,17 +1830,27 @@ EXPORT_SYMBOL_GPL(wm8903_mic_detect);
static irqreturn_t wm8903_irq(int irq, void *data) { - struct snd_soc_codec *codec = data; - struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); - int mic_report; - int int_pol; - int int_val = 0; - int mask = ~snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1_MASK); + struct wm8903_priv *wm8903 = data; + int mic_report, ret; + unsigned int int_val, mask, int_pol; + + ret = regmap_read(wm8903->regmap, WM8903_INTERRUPT_STATUS_1_MASK, + &mask); + if (ret != 0) { + dev_err(wm8903->dev, "Failed to read IRQ mask: %d\n", ret); + return IRQ_NONE; + } + + ret = regmap_read(wm8903->regmap, WM8903_INTERRUPT_STATUS_1, &int_val); + if (ret != 0) { + dev_err(wm8903->dev, "Failed to read IRQ status: %d\n", ret); + return IRQ_NONE; + }
- int_val = snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1) & mask; + int_val &= ~mask;
if (int_val & WM8903_WSEQ_BUSY_EINT) { - dev_warn(codec->dev, "Write sequencer done\n"); + dev_warn(wm8903->dev, "Write sequencer done\n"); }
/* @@ -1851,22 +1861,28 @@ static irqreturn_t wm8903_irq(int irq, void *data) * the polarity register. */ mic_report = wm8903->mic_last_report; - int_pol = snd_soc_read(codec, WM8903_INTERRUPT_POLARITY_1); + ret = regmap_read(wm8903->regmap, WM8903_INTERRUPT_POLARITY_1, + &int_pol); + if (ret != 0) { + dev_err(wm8903->dev, "Failed to read interrupt polarity: %d\n", + ret); + return IRQ_HANDLED; + }
#ifndef CONFIG_SND_SOC_WM8903_MODULE if (int_val & (WM8903_MICSHRT_EINT | WM8903_MICDET_EINT)) - trace_snd_soc_jack_irq(dev_name(codec->dev)); + trace_snd_soc_jack_irq(dev_name(wm8903->dev)); #endif
if (int_val & WM8903_MICSHRT_EINT) { - dev_dbg(codec->dev, "Microphone short (pol=%x)\n", int_pol); + dev_dbg(wm8903->dev, "Microphone short (pol=%x)\n", int_pol);
mic_report ^= wm8903->mic_short; int_pol ^= WM8903_MICSHRT_INV; }
if (int_val & WM8903_MICDET_EINT) { - dev_dbg(codec->dev, "Microphone detect (pol=%x)\n", int_pol); + dev_dbg(wm8903->dev, "Microphone detect (pol=%x)\n", int_pol);
mic_report ^= wm8903->mic_det; int_pol ^= WM8903_MICDET_INV; @@ -1874,8 +1890,8 @@ static irqreturn_t wm8903_irq(int irq, void *data) msleep(wm8903->mic_delay); }
- snd_soc_update_bits(codec, WM8903_INTERRUPT_POLARITY_1, - WM8903_MICSHRT_INV | WM8903_MICDET_INV, int_pol); + regmap_update_bits(wm8903->regmap, WM8903_INTERRUPT_POLARITY_1, + WM8903_MICSHRT_INV | WM8903_MICDET_INV, int_pol);
snd_soc_jack_report(wm8903->mic_jack, mic_report, wm8903->mic_short | wm8903->mic_det); @@ -2108,7 +2124,7 @@ static int wm8903_probe(struct snd_soc_codec *codec) ret = request_threaded_irq(wm8903->irq, NULL, wm8903_irq, trigger | IRQF_ONESHOT, - "wm8903", codec); + "wm8903", wm8903); if (ret != 0) { dev_err(codec->dev, "Failed to request IRQ: %d\n", ret); @@ -2164,7 +2180,7 @@ static int wm8903_remove(struct snd_soc_codec *codec)
wm8903_set_bias_level(codec, SND_SOC_BIAS_OFF); if (wm8903->irq) - free_irq(wm8903->irq, codec); + free_irq(wm8903->irq, wm8903);
return 0; }
There's no reason to defer requesting of the interrupt until the CODEC probe and doing so results in more work if we hit an error as we'll have registered the CODEC with the core. It's neater to acquire as many of the resources we'll need as we can in the bus probe function.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8903.c | 66 +++++++++++++++++++++------------------------ 1 file changed, 31 insertions(+), 35 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 8fe9b78..21c4dd2 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -122,7 +122,6 @@ struct wm8903_priv {
int sysclk; int sysclk_src; - int irq;
int fs; int deemph; @@ -2096,9 +2095,7 @@ static void wm8903_free_gpio(struct wm8903_priv *wm8903) static int wm8903_probe(struct snd_soc_codec *codec) { struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); - struct wm8903_platform_data *pdata = wm8903->pdata; int ret; - int trigger, irq_pol; u16 val;
wm8903->codec = codec; @@ -2110,32 +2107,6 @@ static int wm8903_probe(struct snd_soc_codec *codec) return ret; }
- if (wm8903->irq) { - if (pdata->irq_active_low) { - trigger = IRQF_TRIGGER_LOW; - irq_pol = WM8903_IRQ_POL; - } else { - trigger = IRQF_TRIGGER_HIGH; - irq_pol = 0; - } - - snd_soc_update_bits(codec, WM8903_INTERRUPT_CONTROL, - WM8903_IRQ_POL, irq_pol); - - ret = request_threaded_irq(wm8903->irq, NULL, wm8903_irq, - trigger | IRQF_ONESHOT, - "wm8903", wm8903); - if (ret != 0) { - dev_err(codec->dev, "Failed to request IRQ: %d\n", - ret); - return ret; - } - - /* Enable write sequencer interrupts */ - snd_soc_update_bits(codec, WM8903_INTERRUPT_STATUS_1_MASK, - WM8903_IM_WSEQ_BUSY_EINT, 0); - } - /* power on device */ wm8903_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
@@ -2176,11 +2147,7 @@ static int wm8903_probe(struct snd_soc_codec *codec) /* power down chip */ static int wm8903_remove(struct snd_soc_codec *codec) { - struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); - wm8903_set_bias_level(codec, SND_SOC_BIAS_OFF); - if (wm8903->irq) - free_irq(wm8903->irq, wm8903);
return 0; } @@ -2290,8 +2257,9 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, { struct wm8903_platform_data *pdata = dev_get_platdata(&i2c->dev); struct wm8903_priv *wm8903; + int trigger; bool mic_gpio = false; - unsigned int val; + unsigned int val, irq_pol; int ret, i;
wm8903 = devm_kzalloc(&i2c->dev, sizeof(struct wm8903_priv), @@ -2309,7 +2277,6 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, }
i2c_set_clientdata(i2c, wm8903); - wm8903->irq = i2c->irq;
/* If no platform data was supplied, create storage for defaults */ if (pdata) { @@ -2403,6 +2370,33 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
wm8903->mic_delay = pdata->micdet_delay;
+ if (i2c->irq) { + if (pdata->irq_active_low) { + trigger = IRQF_TRIGGER_LOW; + irq_pol = WM8903_IRQ_POL; + } else { + trigger = IRQF_TRIGGER_HIGH; + irq_pol = 0; + } + + regmap_update_bits(wm8903->regmap, WM8903_INTERRUPT_CONTROL, + WM8903_IRQ_POL, irq_pol); + + ret = request_threaded_irq(i2c->irq, NULL, wm8903_irq, + trigger | IRQF_ONESHOT, + "wm8903", wm8903); + if (ret != 0) { + dev_err(wm8903->dev, "Failed to request IRQ: %d\n", + ret); + return ret; + } + + /* Enable write sequencer interrupts */ + regmap_update_bits(wm8903->regmap, + WM8903_INTERRUPT_STATUS_1_MASK, + WM8903_IM_WSEQ_BUSY_EINT, 0); + } + ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8903, &wm8903_dai, 1); if (ret != 0) @@ -2418,6 +2412,8 @@ static __devexit int wm8903_i2c_remove(struct i2c_client *client) { struct wm8903_priv *wm8903 = i2c_get_clientdata(client);
+ if (client->irq) + free_irq(client->irq, wm8903); wm8903_free_gpio(wm8903); regmap_exit(wm8903->regmap); snd_soc_unregister_codec(&client->dev);
Also convert to use update_bits() while we're at it. No great need to do this, it's just a bit neater to do as much as possible in the I2C probe.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8903.c | 63 ++++++++++++++++++++++----------------------- 1 file changed, 31 insertions(+), 32 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 21c4dd2..9410d54 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -2096,7 +2096,6 @@ static int wm8903_probe(struct snd_soc_codec *codec) { struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); int ret; - u16 val;
wm8903->codec = codec; codec->control_data = wm8903->regmap; @@ -2110,37 +2109,6 @@ static int wm8903_probe(struct snd_soc_codec *codec) /* power on device */ wm8903_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
- /* Latch volume update bits */ - val = snd_soc_read(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT); - val |= WM8903_ADCVU; - snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_LEFT, val); - snd_soc_write(codec, WM8903_ADC_DIGITAL_VOLUME_RIGHT, val); - - val = snd_soc_read(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT); - val |= WM8903_DACVU; - snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_LEFT, val); - snd_soc_write(codec, WM8903_DAC_DIGITAL_VOLUME_RIGHT, val); - - val = snd_soc_read(codec, WM8903_ANALOGUE_OUT1_LEFT); - val |= WM8903_HPOUTVU; - snd_soc_write(codec, WM8903_ANALOGUE_OUT1_LEFT, val); - snd_soc_write(codec, WM8903_ANALOGUE_OUT1_RIGHT, val); - - val = snd_soc_read(codec, WM8903_ANALOGUE_OUT2_LEFT); - val |= WM8903_LINEOUTVU; - snd_soc_write(codec, WM8903_ANALOGUE_OUT2_LEFT, val); - snd_soc_write(codec, WM8903_ANALOGUE_OUT2_RIGHT, val); - - val = snd_soc_read(codec, WM8903_ANALOGUE_OUT3_LEFT); - val |= WM8903_SPKVU; - snd_soc_write(codec, WM8903_ANALOGUE_OUT3_LEFT, val); - snd_soc_write(codec, WM8903_ANALOGUE_OUT3_RIGHT, val); - - /* Enable DAC soft mute by default */ - snd_soc_update_bits(codec, WM8903_DAC_DIGITAL_1, - WM8903_DAC_MUTEMODE | WM8903_DAC_MUTE, - WM8903_DAC_MUTEMODE | WM8903_DAC_MUTE); - return ret; }
@@ -2397,6 +2365,37 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, WM8903_IM_WSEQ_BUSY_EINT, 0); }
+ /* Latch volume update bits */ + regmap_update_bits(wm8903->regmap, WM8903_ADC_DIGITAL_VOLUME_LEFT, + WM8903_ADCVU, WM8903_ADCVU); + regmap_update_bits(wm8903->regmap, WM8903_ADC_DIGITAL_VOLUME_RIGHT, + WM8903_ADCVU, WM8903_ADCVU); + + regmap_update_bits(wm8903->regmap, WM8903_DAC_DIGITAL_VOLUME_LEFT, + WM8903_DACVU, WM8903_DACVU); + regmap_update_bits(wm8903->regmap, WM8903_DAC_DIGITAL_VOLUME_RIGHT, + WM8903_DACVU, WM8903_DACVU); + + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT1_LEFT, + WM8903_HPOUTVU, WM8903_HPOUTVU); + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT1_RIGHT, + WM8903_HPOUTVU, WM8903_HPOUTVU); + + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT2_LEFT, + WM8903_LINEOUTVU, WM8903_LINEOUTVU); + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT2_RIGHT, + WM8903_LINEOUTVU, WM8903_LINEOUTVU); + + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT3_LEFT, + WM8903_SPKVU, WM8903_SPKVU); + regmap_update_bits(wm8903->regmap, WM8903_ANALOGUE_OUT3_RIGHT, + WM8903_SPKVU, WM8903_SPKVU); + + /* Enable DAC soft mute by default */ + regmap_update_bits(wm8903->regmap, WM8903_DAC_DIGITAL_1, + WM8903_DAC_MUTEMODE | WM8903_DAC_MUTE, + WM8903_DAC_MUTEMODE | WM8903_DAC_MUTE); + ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8903, &wm8903_dai, 1); if (ret != 0)
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8903.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 9410d54..676432d 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -2236,7 +2236,7 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, return -ENOMEM; wm8903->dev = &i2c->dev;
- wm8903->regmap = regmap_init_i2c(i2c, &wm8903_regmap); + wm8903->regmap = devm_regmap_init_i2c(i2c, &wm8903_regmap); if (IS_ERR(wm8903->regmap)) { ret = PTR_ERR(wm8903->regmap); dev_err(&i2c->dev, "Failed to allocate register map: %d\n", @@ -2403,7 +2403,6 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
return 0; err: - regmap_exit(wm8903->regmap); return ret; }
@@ -2414,7 +2413,6 @@ static __devexit int wm8903_i2c_remove(struct i2c_client *client) if (client->irq) free_irq(client->irq, wm8903); wm8903_free_gpio(wm8903); - regmap_exit(wm8903->regmap); snd_soc_unregister_codec(&client->dev);
return 0;
On 06/08/2012 09:09 PM, Mark Brown wrote:
Ensure that the device pins are configured as soon as possible by moving the pin configration (including MICBIAS) into the I2C probe() function. This had been done in the CODEC probe() function when we were relying on the ASoC register I/O code.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com
The series,
Tested-by: Stephen Warren swarren@wwwdotorg.org
(although I had a little trouble applying it; what was it based on?)
On Mon, Jun 11, 2012 at 11:26:07AM -0600, Stephen Warren wrote:
(although I had a little trouble applying it; what was it based on?)
It's based on my work tree which has a couple of broken changes for the device sitting in it that I need to fix up and release.
participants (2)
-
Mark Brown -
Stephen Warren