@@ -63,6 +63,16 @@ struct snd_platform_data {
unsigned sram_size_playback;
unsigned sram_size_capture;
+ /*
+ * If McBSP peripheral gets the clock from an external pin,
+ * there are three chooses, that are MCBSP_CLKX, MCBSP_CLKR
+ * and MCBSP_CLKS.
+ * Depending on different hardware connections it is possible
+ * to use this setting to change the behaviour of McBSP
+ * driver. The dm365_clk_input_pin enum is available for dm365
+ */
+ int clk_input_pin;
+
/* McASP specific fields */
int tdm_slots;
u8 op_mode;
@@ -78,6 +88,11 @@ enum {
MCASP_VERSION_2, /* DA8xx/OMAPL1x */
};
+enum dm365_clk_input_pin {
+ MCBSP_CLKR = 0, /* DM365 */
+ MCBSP_CLKS,
+};
+
#define INACTIVE_MODE 0
#define TX_MODE 1
#define RX_MODE 2
@@ -122,6 +122,7 @@ static const unsigned char double_fmt[SNDRV_PCM_FORMAT_S32_LE + 1] = {
};
struct davinci_mcbsp_dev {
+ struct device *dev;
struct davinci_pcm_dma_params dma_params[2];
void __iomem *base;
#define MOD_DSP_A 0
@@ -153,6 +154,7 @@ struct davinci_mcbsp_dev {
unsigned int fmt;
int clk_div;
+ int clk_input_pin;
};
static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
@@ -279,11 +281,26 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
DAVINCI_MCBSP_PCR_CLKRM;
break;
case SND_SOC_DAIFMT_CBM_CFS:
- /* McBSP CLKR pin is the input for the Sample Rate Generator.
- * McBSP FSR and FSX are driven by the Sample Rate Generator. */
- pcr = DAVINCI_MCBSP_PCR_SCLKME |
- DAVINCI_MCBSP_PCR_FSXM |
- DAVINCI_MCBSP_PCR_FSRM;
+ pcr = DAVINCI_MCBSP_PCR_FSRM | DAVINCI_MCBSP_PCR_FSXM;
+ /*
+ * Selection of the clock input pin that is the
+ * input for the Sample Rate Generator.
+ * McBSP FSR and FSX are driven by the Sample Rate
+ * Generator.
+ */
+ switch (dev->clk_input_pin) {
+ case MCBSP_CLKS:
+ pcr |= DAVINCI_MCBSP_PCR_CLKXM |
+ DAVINCI_MCBSP_PCR_CLKRM;
+ break;
+ case MCBSP_CLKR:
+ pcr |= DAVINCI_MCBSP_PCR_SCLKME;
+ break;
+ default:
+ dev_err(dev->dev, "bad clk_input_pin\n");
+ return -EINVAL;
+ }
+
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* codec is master */
@@ -644,6 +661,7 @@ static int davinci_i2s_probe(struct platform_device *pdev)
pdata->sram_size_playback;
dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].sram_size =
pdata->sram_size_capture;
+ dev->clk_input_pin = pdata->clk_input_pin;
}
dev->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk)) {
@@ -676,6 +694,7 @@ static int davinci_i2s_probe(struct platform_device *pdev)
goto err_free_mem;
}
dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel = res->start;
+ dev->dev = &pdev->dev;
davinci_i2s_dai.private_data = dev;
davinci_i2s_dai.capture.dma_data = dev->dma_params;