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Diffstat (limited to 'sound/soc/davinci/davinci-mcasp.c')
-rw-r--r--sound/soc/davinci/davinci-mcasp.c152
1 files changed, 97 insertions, 55 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 714e51e5be5b..55e2bf652bef 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -199,6 +199,7 @@
#define ACLKXE BIT(5)
#define TX_ASYNC BIT(6)
#define ACLKXPOL BIT(7)
+#define ACLKXDIV_MASK 0x1f
/*
* DAVINCI_MCASP_ACLKRCTL_REG Receive Clock Control Register Bits
@@ -207,6 +208,7 @@
#define ACLKRE BIT(5)
#define RX_ASYNC BIT(6)
#define ACLKRPOL BIT(7)
+#define ACLKRDIV_MASK 0x1f
/*
* DAVINCI_MCASP_AHCLKXCTL_REG - High Frequency Transmit Clock Control
@@ -215,6 +217,7 @@
#define AHCLKXDIV(val) (val)
#define AHCLKXPOL BIT(14)
#define AHCLKXE BIT(15)
+#define AHCLKXDIV_MASK 0xfff
/*
* DAVINCI_MCASP_AHCLKRCTL_REG - High Frequency Receive Clock Control
@@ -223,6 +226,7 @@
#define AHCLKRDIV(val) (val)
#define AHCLKRPOL BIT(14)
#define AHCLKRE BIT(15)
+#define AHCLKRDIV_MASK 0xfff
/*
* DAVINCI_MCASP_XRSRCTL_BASE_REG - Serializer Control Register Bits
@@ -473,6 +477,23 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
void __iomem *base = dev->base;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_DSP_B:
+ case SND_SOC_DAIFMT_AC97:
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
+ break;
+ default:
+ /* configure a full-word SYNC pulse (LRCLK) */
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
+
+ /* make 1st data bit occur one ACLK cycle after the frame sync */
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
+ break;
+ }
+
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* codec is clock and frame slave */
@@ -482,8 +503,7 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
- mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
- ACLKX | AHCLKX | AFSX);
+ mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, ACLKX | AFSX);
break;
case SND_SOC_DAIFMT_CBM_CFS:
/* codec is clock master and frame slave */
@@ -554,59 +574,75 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
return 0;
}
-static int davinci_config_channel_size(struct davinci_audio_dev *dev,
- int channel_size)
+static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
{
- u32 fmt = 0;
- u32 mask, rotate;
-
- switch (channel_size) {
- case DAVINCI_AUDIO_WORD_8:
- fmt = 0x03;
- rotate = 6;
- mask = 0x000000ff;
- break;
+ struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
- case DAVINCI_AUDIO_WORD_12:
- fmt = 0x05;
- rotate = 5;
- mask = 0x00000fff;
+ switch (div_id) {
+ case 0: /* MCLK divider */
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
+ AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
+ AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
break;
- case DAVINCI_AUDIO_WORD_16:
- fmt = 0x07;
- rotate = 4;
- mask = 0x0000ffff;
+ case 1: /* BCLK divider */
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
+ ACLKXDIV(div - 1), ACLKXDIV_MASK);
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKRCTL_REG,
+ ACLKRDIV(div - 1), ACLKRDIV_MASK);
break;
- case DAVINCI_AUDIO_WORD_20:
- fmt = 0x09;
- rotate = 3;
- mask = 0x000fffff;
+ case 2: /* BCLK/LRCLK ratio */
+ dev->bclk_lrclk_ratio = div;
break;
- case DAVINCI_AUDIO_WORD_24:
- fmt = 0x0B;
- rotate = 2;
- mask = 0x00ffffff;
- break;
+ default:
+ return -EINVAL;
+ }
- case DAVINCI_AUDIO_WORD_28:
- fmt = 0x0D;
- rotate = 1;
- mask = 0x0fffffff;
- break;
+ return 0;
+}
- case DAVINCI_AUDIO_WORD_32:
- fmt = 0x0F;
- rotate = 0;
- mask = 0xffffffff;
- break;
+static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
- default:
- return -EINVAL;
+ if (dir == SND_SOC_CLOCK_OUT) {
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
+ } else {
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
}
+ return 0;
+}
+
+static int davinci_config_channel_size(struct davinci_audio_dev *dev,
+ int word_length)
+{
+ u32 fmt;
+ u32 rotate = (32 - word_length) / 4;
+ u32 mask = (1ULL << word_length) - 1;
+
+ /*
+ * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
+ * callback, take it into account here. That allows us to for example
+ * send 32 bits per channel to the codec, while only 16 of them carry
+ * audio payload.
+ * The clock ratio is given for a full period of data (both left and
+ * right channels), so it has to be divided by 2.
+ */
+ if (dev->bclk_lrclk_ratio)
+ word_length = dev->bclk_lrclk_ratio / 2;
+
+ /* mapping of the XSSZ bit-field as described in the datasheet */
+ fmt = (word_length >> 1) - 1;
+
mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
RXSSZ(fmt), RXSSZ(0x0F));
mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
@@ -709,8 +745,6 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* bit stream is MSB first with no delay */
/* DSP_B mode */
- mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
- AHCLKXE);
mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, mask);
mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
@@ -720,14 +754,10 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
else
printk(KERN_ERR "playback tdm slot %d not supported\n",
dev->tdm_slots);
-
- mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
} else {
/* bit stream is MSB first with no delay */
/* DSP_B mode */
mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
- mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
- AHCLKRE);
mcasp_set_reg(dev->base + DAVINCI_MCASP_RXTDM_REG, mask);
if ((dev->tdm_slots >= 2) && (dev->tdm_slots <= 32))
@@ -736,8 +766,6 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
else
printk(KERN_ERR "capture tdm slot %d not supported\n",
dev->tdm_slots);
-
- mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
}
}
@@ -800,19 +828,27 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
case SNDRV_PCM_FORMAT_U8:
case SNDRV_PCM_FORMAT_S8:
dma_params->data_type = 1;
- word_length = DAVINCI_AUDIO_WORD_8;
+ word_length = 8;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
dma_params->data_type = 2;
- word_length = DAVINCI_AUDIO_WORD_16;
+ word_length = 16;
+ break;
+
+ case SNDRV_PCM_FORMAT_U24_3LE:
+ case SNDRV_PCM_FORMAT_S24_3LE:
+ dma_params->data_type = 3;
+ word_length = 24;
break;
+ case SNDRV_PCM_FORMAT_U24_LE:
+ case SNDRV_PCM_FORMAT_S24_LE:
case SNDRV_PCM_FORMAT_U32_LE:
case SNDRV_PCM_FORMAT_S32_LE:
dma_params->data_type = 4;
- word_length = DAVINCI_AUDIO_WORD_32;
+ word_length = 32;
break;
default:
@@ -880,13 +916,18 @@ static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
.trigger = davinci_mcasp_trigger,
.hw_params = davinci_mcasp_hw_params,
.set_fmt = davinci_mcasp_set_dai_fmt,
-
+ .set_clkdiv = davinci_mcasp_set_clkdiv,
+ .set_sysclk = davinci_mcasp_set_sysclk,
};
#define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_U8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_U16_LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_U24_LE | \
+ SNDRV_PCM_FMTBIT_S24_3LE | \
+ SNDRV_PCM_FMTBIT_U24_3LE | \
SNDRV_PCM_FMTBIT_S32_LE | \
SNDRV_PCM_FMTBIT_U32_LE)
@@ -1089,7 +1130,6 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dev->tdm_slots = pdata->tdm_slots;
dev->num_serializer = pdata->num_serializer;
dev->serial_dir = pdata->serial_dir;
- dev->codec_fmt = pdata->codec_fmt;
dev->version = pdata->version;
dev->txnumevt = pdata->txnumevt;
dev->rxnumevt = pdata->rxnumevt;
@@ -1098,6 +1138,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
dma_data->asp_chan_q = pdata->asp_chan_q;
dma_data->ram_chan_q = pdata->ram_chan_q;
+ dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_playback;
dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
mem->start);
@@ -1115,6 +1156,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
dma_data->asp_chan_q = pdata->asp_chan_q;
dma_data->ram_chan_q = pdata->ram_chan_q;
+ dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_capture;
dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
mem->start);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.