ASoC: DaVinci: Fixes to McASP configuration

McASP register settings are not correct for DSP mode of operation.
There is a channel swap initally. This patch provides fixes to
the register values for proper working.

Tested on DA830/OMAP-L137 EVM, DM6467 EVM.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index eca22d7829d22744d1a57f797a3740ff1d8af96d..7a06c0a86665a806e0dfbda55f3bb34b509e6f7a 100644 (file)
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -512,34 +512,49 @@ static int davinci_config_channel_size(struct davinci_audio_dev *dev,
                                       int channel_size)
 {
        u32 fmt = 0;
+       u32 mask, rotate;
 
        switch (channel_size) {
        case DAVINCI_AUDIO_WORD_8:
                fmt = 0x03;
+               rotate = 6;
+               mask = 0x000000ff;
                break;
 
        case DAVINCI_AUDIO_WORD_12:
                fmt = 0x05;
+               rotate = 5;
+               mask = 0x00000fff;
                break;
 
        case DAVINCI_AUDIO_WORD_16:
                fmt = 0x07;
+               rotate = 4;
+               mask = 0x0000ffff;
                break;
 
        case DAVINCI_AUDIO_WORD_20:
                fmt = 0x09;
+               rotate = 3;
+               mask = 0x000fffff;
                break;
 
        case DAVINCI_AUDIO_WORD_24:
                fmt = 0x0B;
+               rotate = 2;
+               mask = 0x00ffffff;
                break;
 
        case DAVINCI_AUDIO_WORD_28:
                fmt = 0x0D;
+               rotate = 1;
+               mask = 0x0fffffff;
                break;
 
        case DAVINCI_AUDIO_WORD_32:
                fmt = 0x0F;
+               rotate = 0;
+               mask = 0xffffffff;
                break;
 
        default:
@@ -550,6 +565,13 @@ static int davinci_config_channel_size(struct davinci_audio_dev *dev,
                                        RXSSZ(fmt), RXSSZ(0x0F));
        mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
                                        TXSSZ(fmt), TXSSZ(0x0F));
+       mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXROT(rotate),
+                                                       TXROT(7));
+       mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXROT(rotate),
+                                                       RXROT(7));
+       mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
+       mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
+
        return 0;
 }
 
@@ -638,7 +660,6 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
                        printk(KERN_ERR "playback tdm slot %d not supported\n",
                                dev->tdm_slots);
 
-               mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0xFFFFFFFF);
                mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
        } else {
                /* bit stream is MSB first with no delay */
@@ -655,7 +676,6 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
                        printk(KERN_ERR "capture tdm slot %d not supported\n",
                                dev->tdm_slots);
 
-               mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, 0xFFFFFFFF);
                mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
        }
 }