Merge branch 'topic/asoc' into for-linus

Conflicts:
	sound/soc/codecs/ad1938.c

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;