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Diffstat (limited to 'sound/soc/davinci/davinci-mcasp.c')
-rw-r--r--sound/soc/davinci/davinci-mcasp.c110
1 files changed, 77 insertions, 33 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 9321e5c9d8c..8b85049daab 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -235,6 +235,8 @@
#define DISMOD (val)(val<<2)
#define TXSTATE BIT(4)
#define RXSTATE BIT(5)
+#define SRMOD_MASK 3
+#define SRMOD_INACTIVE 0
/*
* DAVINCI_MCASP_LBCTL_REG - Loop Back Control Register Bits
@@ -634,35 +636,43 @@ static int davinci_config_channel_size(struct davinci_audio_dev *dev,
* 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.
+ * The clock ratio is given for a full period of data (for I2S format
+ * both left and right channels), so it has to be divided by number of
+ * tdm-slots (for I2S - divided by 2).
*/
if (dev->bclk_lrclk_ratio)
- word_length = dev->bclk_lrclk_ratio / 2;
+ word_length = dev->bclk_lrclk_ratio / dev->tdm_slots;
/* 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,
- 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));
+ if (dev->op_mode != DAVINCI_MCASP_DIT_MODE) {
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
+ 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_RXMASK_REG,
+ mask);
+ }
+
mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
- mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
return 0;
}
-static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
+static int davinci_hw_common_param(struct davinci_audio_dev *dev, int stream,
+ int channels)
{
int i;
u8 tx_ser = 0;
u8 rx_ser = 0;
-
+ u8 ser;
+ u8 slots = dev->tdm_slots;
+ u8 max_active_serializers = (channels + slots - 1) / slots;
/* Default configuration */
mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
@@ -682,17 +692,33 @@ static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
for (i = 0; i < dev->num_serializer; i++) {
mcasp_set_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
dev->serial_dir[i]);
- if (dev->serial_dir[i] == TX_MODE) {
+ if (dev->serial_dir[i] == TX_MODE &&
+ tx_ser < max_active_serializers) {
mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
AXR(i));
tx_ser++;
- } else if (dev->serial_dir[i] == RX_MODE) {
+ } else if (dev->serial_dir[i] == RX_MODE &&
+ rx_ser < max_active_serializers) {
mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
AXR(i));
rx_ser++;
+ } else {
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
+ SRMOD_INACTIVE, SRMOD_MASK);
}
}
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ ser = tx_ser;
+ else
+ ser = rx_ser;
+
+ if (ser < max_active_serializers) {
+ dev_warn(dev->dev, "stream has more channels (%d) than are "
+ "enabled in mcasp (%d)\n", channels, ser * slots);
+ return -EINVAL;
+ }
+
if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (dev->txnumevt * tx_ser > 64)
dev->txnumevt = 1;
@@ -729,6 +755,8 @@ static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
}
}
+
+ return 0;
}
static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
@@ -772,12 +800,6 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
/* S/PDIF */
static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
{
- /* Set the PDIR for Serialiser as output */
- mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
-
- /* TXMASK for 24 bits */
- mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
-
/* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
and LSB first */
mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
@@ -812,12 +834,21 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
&dev->dma_params[substream->stream];
int word_length;
u8 fifo_level;
+ u8 slots = dev->tdm_slots;
+ u8 active_serializers;
+ int channels;
+ struct snd_interval *pcm_channels = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_CHANNELS);
+ channels = pcm_channels->min;
+
+ active_serializers = (channels + slots - 1) / slots;
- davinci_hw_common_param(dev, substream->stream);
+ if (davinci_hw_common_param(dev, substream->stream, channels) == -EINVAL)
+ return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- fifo_level = dev->txnumevt;
+ fifo_level = dev->txnumevt * active_serializers;
else
- fifo_level = dev->rxnumevt;
+ fifo_level = dev->rxnumevt * active_serializers;
if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
davinci_hw_dit_param(dev);
@@ -936,13 +967,13 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
.name = "davinci-mcasp.0",
.playback = {
.channels_min = 2,
- .channels_max = 2,
+ .channels_max = 32 * 16,
.rates = DAVINCI_MCASP_RATES,
.formats = DAVINCI_MCASP_PCM_FMTS,
},
.capture = {
.channels_min = 2,
- .channels_max = 2,
+ .channels_max = 32 * 16,
.rates = DAVINCI_MCASP_RATES,
.formats = DAVINCI_MCASP_PCM_FMTS,
},
@@ -962,6 +993,10 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
};
+static const struct snd_soc_component_driver davinci_mcasp_component = {
+ .name = "davinci-mcasp",
+};
+
static const struct of_device_id mcasp_dt_ids[] = {
{
.compatible = "ti,dm646x-mcasp-audio",
@@ -1015,8 +1050,16 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
pdata->op_mode = val;
ret = of_property_read_u32(np, "tdm-slots", &val);
- if (ret >= 0)
+ if (ret >= 0) {
+ if (val < 2 || val > 32) {
+ dev_err(&pdev->dev,
+ "tdm-slots must be in rage [2-32]\n");
+ ret = -EINVAL;
+ goto nodata;
+ }
+
pdata->tdm_slots = val;
+ }
ret = of_property_read_u32(np, "num-serializer", &val);
if (ret >= 0)
@@ -1170,7 +1213,8 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data->channel = res->start;
dev_set_drvdata(&pdev->dev, dev);
- ret = snd_soc_register_dai(&pdev->dev, &davinci_mcasp_dai[pdata->op_mode]);
+ ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
+ &davinci_mcasp_dai[pdata->op_mode], 1);
if (ret != 0)
goto err_release_clk;
@@ -1178,13 +1222,13 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
ret = davinci_soc_platform_register(&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
- goto err_unregister_dai;
+ goto err_unregister_component;
}
return 0;
-err_unregister_dai:
- snd_soc_unregister_dai(&pdev->dev);
+err_unregister_component:
+ snd_soc_unregister_component(&pdev->dev);
err_release_clk:
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -1194,7 +1238,7 @@ err_release_clk:
static int davinci_mcasp_remove(struct platform_device *pdev)
{
- snd_soc_unregister_dai(&pdev->dev);
+ snd_soc_unregister_component(&pdev->dev);
davinci_soc_platform_unregister(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-09 04:58:40 +0000