diff options
author | Takashi Iwai <tiwai@suse.de> | 2010-05-20 12:00:43 +0200 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2010-05-20 12:00:43 +0200 |
commit | d71f4cece4bd97d05592836202fc04ff2e7817e3 (patch) | |
tree | 6c877c7a938758b1323d9c97d46b9c536e618c69 /sound/soc/codecs/wm8903.c | |
parent | 19008bdacb9f7841166ebafe0aef361ee582ffbf (diff) | |
parent | ad8332c1302bcb4f80d593fd3eb477be9d7f5604 (diff) |
Merge branch 'topic/asoc' into for-linus
Conflicts:
sound/soc/codecs/ad1938.c
Diffstat (limited to 'sound/soc/codecs/wm8903.c')
-rw-r--r-- | sound/soc/codecs/wm8903.c | 217 |
1 files changed, 196 insertions, 21 deletions
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index fa5f99fde68b..bf08282d5ee5 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -11,26 +11,27 @@ * * TODO: * - TDM mode configuration. - * - Mic detect. * - Digital microphone support. - * - Interrupt support (mic detect and sequencer). */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> +#include <linux/completion.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <sound/core.h> +#include <sound/jack.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/tlv.h> #include <sound/soc.h> #include <sound/soc-dapm.h> #include <sound/initval.h> +#include <sound/wm8903.h> #include "wm8903.h" @@ -222,6 +223,14 @@ struct wm8903_priv { int playback_active; int capture_active; + struct completion wseq; + + struct snd_soc_jack *mic_jack; + int mic_det; + int mic_short; + int mic_last_report; + int mic_delay; + struct snd_pcm_substream *master_substream; struct snd_pcm_substream *slave_substream; }; @@ -244,13 +253,14 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start) { u16 reg[5]; struct i2c_client *i2c = codec->control_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); 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); @@ -258,20 +268,19 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start) start | WM8903_WSEQ_START); /* Wait for it to complete. If we have the interrupt wired up then - * we could block waiting for an interrupt, though polling may still - * be desirable for diagnostic purposes. + * that will break us out of the poll early. */ do { - msleep(10); + wait_for_completion_timeout(&wm8903->wseq, + msecs_to_jiffies(10)); reg[4] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_4); } while (reg[4] & WM8903_WSEQ_BUSY); 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; } @@ -412,7 +421,7 @@ static int wm8903_class_w_put(struct snd_kcontrol *kcontrol, { struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); struct snd_soc_codec *codec = widget->codec; - struct wm8903_priv *wm8903 = codec->private_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); struct i2c_client *i2c = codec->control_data; u16 reg; int ret; @@ -993,7 +1002,7 @@ static int wm8903_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; - struct wm8903_priv *wm8903 = codec->private_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); wm8903->sysclk = freq; @@ -1221,7 +1230,7 @@ static int wm8903_startup(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; - struct wm8903_priv *wm8903 = codec->private_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); struct i2c_client *i2c = codec->control_data; struct snd_pcm_runtime *master_runtime; @@ -1257,7 +1266,7 @@ static void wm8903_shutdown(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; - struct wm8903_priv *wm8903 = codec->private_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) wm8903->playback_active--; @@ -1277,7 +1286,7 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; - struct wm8903_priv *wm8903 = codec->private_data; + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); struct i2c_client *i2c = codec->control_data; int fs = params_rate(params); int bclk; @@ -1436,6 +1445,116 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream, return 0; } +/** + * wm8903_mic_detect - Enable microphone detection via the WM8903 IRQ + * + * @codec: WM8903 codec + * @jack: jack to report detection events on + * @det: value to report for presence detection + * @shrt: value to report for short detection + * + * Enable microphone detection via IRQ on the WM8903. If GPIOs are + * being used to bring out signals to the processor then only platform + * data configuration is needed for WM8903 and processor GPIOs should + * be configured using snd_soc_jack_add_gpios() instead. + * + * The current threasholds for detection should be configured using + * micdet_cfg in the platform data. Using this function will force on + * the microphone bias for the device. + */ +int wm8903_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack, + int det, int shrt) +{ + struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec); + int irq_mask = WM8903_MICDET_EINT | WM8903_MICSHRT_EINT; + + dev_dbg(codec->dev, "Enabling microphone detection: %x %x\n", + det, shrt); + + /* Store the configuration */ + wm8903->mic_jack = jack; + wm8903->mic_det = det; + wm8903->mic_short = shrt; + + /* Enable interrupts we've got a report configured for */ + if (det) + irq_mask &= ~WM8903_MICDET_EINT; + if (shrt) + irq_mask &= ~WM8903_MICSHRT_EINT; + + snd_soc_update_bits(codec, WM8903_INTERRUPT_STATUS_1_MASK, + WM8903_MICDET_EINT | WM8903_MICSHRT_EINT, + irq_mask); + + if (det && shrt) { + /* Enable mic detection, this may not have been set through + * platform data (eg, if the defaults are OK). */ + snd_soc_update_bits(codec, WM8903_WRITE_SEQUENCER_0, + WM8903_WSEQ_ENA, WM8903_WSEQ_ENA); + snd_soc_update_bits(codec, WM8903_MIC_BIAS_CONTROL_0, + WM8903_MICDET_ENA, WM8903_MICDET_ENA); + } else { + snd_soc_update_bits(codec, WM8903_MIC_BIAS_CONTROL_0, + WM8903_MICDET_ENA, 0); + } + + return 0; +} +EXPORT_SYMBOL_GPL(wm8903_mic_detect); + +static irqreturn_t wm8903_irq(int irq, void *data) +{ + struct wm8903_priv *wm8903 = data; + struct snd_soc_codec *codec = &wm8903->codec; + int mic_report; + int int_pol; + int int_val = 0; + int mask = ~snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1_MASK); + + int_val = snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1) & mask; + + if (int_val & WM8903_WSEQ_BUSY_EINT) { + dev_dbg(codec->dev, "Write sequencer done\n"); + complete(&wm8903->wseq); + } + + /* + * The rest is microphone jack detection. We need to manually + * invert the polarity of the interrupt after each event - to + * simplify the code keep track of the last state we reported + * and just invert the relevant bits in both the report and + * the polarity register. + */ + mic_report = wm8903->mic_last_report; + int_pol = snd_soc_read(codec, WM8903_INTERRUPT_POLARITY_1); + + if (int_val & WM8903_MICSHRT_EINT) { + dev_dbg(codec->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); + + mic_report ^= wm8903->mic_det; + int_pol ^= WM8903_MICDET_INV; + + msleep(wm8903->mic_delay); + } + + snd_soc_update_bits(codec, 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); + + wm8903->mic_last_report = mic_report; + + return IRQ_HANDLED; +} + #define WM8903_PLAYBACK_RATES (SNDRV_PCM_RATE_8000 |\ SNDRV_PCM_RATE_11025 | \ SNDRV_PCM_RATE_16000 | \ @@ -1510,7 +1629,6 @@ static int wm8903_resume(struct platform_device *pdev) /* Bring the codec back up to standby first to minimise pop/clicks */ wm8903_set_bias_level(codec, SND_SOC_BIAS_STANDBY); - wm8903_set_bias_level(codec, codec->suspend_bias_level); /* Sync back everything else */ if (tmp_cache) { @@ -1530,9 +1648,11 @@ static struct snd_soc_codec *wm8903_codec; static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { + struct wm8903_platform_data *pdata = dev_get_platdata(&i2c->dev); struct wm8903_priv *wm8903; struct snd_soc_codec *codec; - int ret; + int ret, i; + int trigger, irq_pol; u16 val; wm8903 = kzalloc(sizeof(struct wm8903_priv), GFP_KERNEL); @@ -1554,8 +1674,9 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8903->reg_cache); codec->reg_cache = &wm8903->reg_cache[0]; - codec->private_data = wm8903; + snd_soc_codec_set_drvdata(codec, wm8903); codec->volatile_register = wm8903_volatile_register; + init_completion(&wm8903->wseq); i2c_set_clientdata(i2c, codec); codec->control_data = i2c; @@ -1579,6 +1700,53 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, wm8903_reset(codec); + /* Set up GPIOs and microphone detection */ + if (pdata) { + for (i = 0; i < ARRAY_SIZE(pdata->gpio_cfg); i++) { + if (!pdata->gpio_cfg[i]) + continue; + + 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; + } + + if (i2c->irq) { + if (pdata && 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(i2c->irq, NULL, wm8903_irq, + trigger | IRQF_ONESHOT, + "wm8903", wm8903); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to request IRQ: %d\n", + ret); + goto err; + } + + /* 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); @@ -1619,7 +1787,7 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(&i2c->dev, "Failed to register codec: %d\n", ret); - goto err; + goto err_irq; } ret = snd_soc_register_dai(&wm8903_dai); @@ -1632,6 +1800,9 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, err_codec: snd_soc_unregister_codec(codec); +err_irq: + if (i2c->irq) + free_irq(i2c->irq, wm8903); err: wm8903_codec = NULL; kfree(wm8903); @@ -1641,13 +1812,17 @@ err: static __devexit int wm8903_i2c_remove(struct i2c_client *client) { struct snd_soc_codec *codec = i2c_get_clientdata(client); + struct wm8903_priv *priv = snd_soc_codec_get_drvdata(codec); snd_soc_unregister_dai(&wm8903_dai); snd_soc_unregister_codec(codec); wm8903_set_bias_level(codec, SND_SOC_BIAS_OFF); - kfree(codec->private_data); + if (client->irq) + free_irq(client->irq, priv); + + kfree(priv); wm8903_codec = NULL; wm8903_dai.dev = NULL; |