rk29_phone wm8994: 增加在系统暂停播放音乐的时候使wm8994进入shutdown状态的功能

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 78f942190e9b0caf12678761cf5cad60ad3dfd6c..88eb4b508d7b1bb529d7fa09a89dba51177f4727 100755 (executable)
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -156,6 +156,9 @@ struct wm8994_priv {
        struct snd_kcontrol *kcontrol;//The current working path
        char RW_status;                         //ERROR = -1, TRUE = 0;
        struct wm8994_pdata *pdata;
+       
+       struct delayed_work wm8994_delayed_work;
+       int work_type;  
 };
 
 static int wm8994_read(unsigned short reg,unsigned short *value)
@@ -311,7 +314,7 @@ static void PA_ctrl(unsigned char ctrl)
                }
                else
                {
-                       DBG("enable PA_control\n");
+                       DBG("disable PA_control\n");
                        gpio_request(WM_PA_PIN, NULL);          //AUDIO_PA_ON    
                        gpio_direction_output(WM_PA_PIN,GPIO_LOW);              
                        gpio_free(WM_PA_PIN);                   
@@ -3044,6 +3047,76 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
        return 0;
 }
 
+static int wm8994_trigger(struct snd_pcm_substream *substream,
+                         int status,
+                         struct snd_soc_dai *dai)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai_link *machine = rtd->dai;
+       struct snd_soc_dai *codec_dai = machine->codec_dai;
+       struct snd_soc_codec *codec = dai->codec;
+       struct wm8994_priv *wm8994 = codec->private_data;
+       
+       unsigned int playback_active = codec_dai->playback.active, capture_active = codec_dai->capture.active;
+       int i, ret; 
+
+
+       DBG("%s::%d status = %d substream->stream '%s'\n",__FUNCTION__,__LINE__,
+           status, substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "PLAYBACK":"CAPTURE");
+
+       if (status == SNDRV_PCM_TRIGGER_STOP || status == SNDRV_PCM_TRIGGER_START) 
+       {
+               if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 
+                       codec_dai->playback.active = status;
+               else 
+                       codec_dai->capture.active = status;
+       }
+
+       if (!codec_dai->playback.active && 
+               !codec_dai->capture.active      && 
+               (playback_active || capture_active)) 
+       {//suspend
+               DBG("It's going to power down wm8994\n");
+               wm8994->work_type = SNDRV_PCM_TRIGGER_STOP;
+               schedule_delayed_work(&wm8994->wm8994_delayed_work, msecs_to_jiffies(1000));
+       } 
+       else if (codec_dai->playback.active || codec_dai->capture.active) 
+       {//resume
+               DBG("Power up wm8994\n");               
+               wm8994->work_type = SNDRV_PCM_TRIGGER_START;
+               schedule_delayed_work(&wm8994->wm8994_delayed_work, msecs_to_jiffies(0));               
+       }
+
+       return 0;
+}
+
+static void wm8994_work_fun(struct work_struct *work)
+{      
+       struct snd_soc_codec *codec = wm8994_codec;
+       struct wm8994_priv *wm8994 = codec->private_data;
+       u16 *reg_cache = codec->reg_cache;
+       int i, ret;
+
+       DBG("Enter %s---%d\n",__FUNCTION__,__LINE__);
+       
+
+       if(wm8994->work_type == SNDRV_PCM_TRIGGER_STOP)
+       {
+               DBG("wm8994 shutdown\n");
+               PA_ctrl(GPIO_LOW);
+               wm8994_write(0,0);
+       //      wm8994_set_bias_level(codec, SND_SOC_BIAS_OFF);
+       }
+       else if(wm8994->work_type == SNDRV_PCM_TRIGGER_START)
+       {
+               DBG("wm8994 shutup\n");
+               PA_ctrl(GPIO_LOW);
+               wm8994_current_mode = null;
+               snd_soc_put_route(wm8994->kcontrol,NULL);
+       }
+       
+}
+
 #endif
 #define WM8994_RATES SNDRV_PCM_RATE_8000_48000
 #define WM8994_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
@@ -3055,6 +3128,7 @@ static struct snd_soc_dai_ops wm8994_ops = {
        .set_fmt = wm8994_set_dai_fmt,
        .set_sysclk = wm8994_set_dai_sysclk,
        .digital_mute = wm8994_mute,
+       .trigger        = wm8994_trigger,
        /*add by qiuen for volume*/
        .set_volume = wm8994_codec_set_volume,
 };
@@ -3269,6 +3343,7 @@ static int wm8994_probe(struct platform_device *pdev)
 {
        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
        struct snd_soc_codec *codec;
+       struct wm8994_priv *wm8994;
        int ret = 0;
 #ifdef WM8994_PROC
        wm8994_proc_init();
@@ -3281,6 +3356,7 @@ static int wm8994_probe(struct platform_device *pdev)
 
        socdev->card->codec = wm8994_codec;
        codec = wm8994_codec;
+       wm8994 = codec->private_data;
        
        /* register pcms */
        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
@@ -3305,7 +3381,8 @@ static int wm8994_probe(struct platform_device *pdev)
        gpio_request(WM_EN_PIN, NULL);                   
        gpio_direction_output(WM_EN_PIN,GPIO_HIGH);             
        gpio_free(WM_EN_PIN);
-       
+
+       INIT_DELAYED_WORK(&wm8994->wm8994_delayed_work, wm8994_work_fun);
        return ret;
 
 card_err: