ASoC: tlv320dac33: Add new FIFO mode: mode 7

[linux-2.6-block.git] / sound / soc / codecs / tlv320dac33.c

diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index c684aa23bd51492b1ea627c890602951701268f8..bc35f3ff871725ba3195f594b4c28760da01bafb 100644 (file)
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -62,6 +62,7 @@ enum dac33_state {
 enum dac33_fifo_modes {
        DAC33_FIFO_BYPASS = 0,
        DAC33_FIFO_MODE1,
+       DAC33_FIFO_MODE7,
        DAC33_FIFO_LAST_MODE,
 };
 
@@ -422,7 +423,7 @@ static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
 
 /* Codec operation modes */
 static const char *dac33_fifo_mode_texts[] = {
-       "Bypass", "Mode 1"
+       "Bypass", "Mode 1", "Mode 7"
 };
 
 static const struct soc_enum dac33_fifo_mode_enum =
@@ -556,6 +557,10 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
                dac33_write16(codec, DAC33_PREFILL_MSB,
                                DAC33_THRREG(dac33->alarm_threshold));
                break;
+       case DAC33_FIFO_MODE7:
+               dac33_write16(codec, DAC33_PREFILL_MSB,
+                               DAC33_THRREG(20));
+               break;
        default:
                dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
                                                        dac33->fifo_mode);
@@ -574,6 +579,9 @@ static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
                dac33_write16(codec, DAC33_NSAMPLE_MSB,
                                DAC33_THRREG(dac33->nsample));
                break;
+       case DAC33_FIFO_MODE7:
+               /* At the moment we are not using interrupts in mode7 */
+               break;
        default:
                dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
                                                        dac33->fifo_mode);
@@ -788,6 +796,10 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
                            DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
                dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
                break;
+       case DAC33_FIFO_MODE7:
+               /* Disable all interrupts */
+               dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
+               break;
        default:
                /* in FIFO bypass mode, the interrupts are not used */
                break;
@@ -807,6 +819,17 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
                fifoctrl_a &= ~DAC33_FAUTO;
                aictrl_b &= ~DAC33_BCLKON;
                break;
+       case DAC33_FIFO_MODE7:
+               /*
+                * For mode1:
+                * Disable the FIFO bypass (Enable the use of FIFO)
+                * Select Threshold mode
+                * BCLK is only running when data is needed by DAC33
+                */
+               fifoctrl_a &= ~DAC33_FBYPAS;
+               fifoctrl_a |= DAC33_FAUTO;
+               aictrl_b &= ~DAC33_BCLKON;
+               break;
        default:
                /*
                 * For FIFO bypass mode:
@@ -830,6 +853,16 @@ static int dac33_prepare_chip(struct snd_pcm_substream *substream)
                dac33_write16(codec, DAC33_ATHR_MSB,
                              DAC33_THRREG(dac33->alarm_threshold));
                break;
+       case DAC33_FIFO_MODE7:
+               /*
+                * Configure the threshold levels, and leave 10 sample space
+                * at the bottom, and also at the top of the FIFO
+                */
+               dac33_write16(codec, DAC33_UTHR_MSB,
+                       DAC33_THRREG(DAC33_BUFFER_SIZE_SAMPLES - 10));
+               dac33_write16(codec, DAC33_LTHR_MSB,
+                       DAC33_THRREG(10));
+               break;
        default:
                /* BYPASS mode */
                dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);