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-rw-r--r--sound/soc/davinci/davinci-mcasp.c105
1 files changed, 97 insertions, 8 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index f0c0347..e672f43 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -102,6 +102,11 @@
/* Receive Buffer for Serializer n */
#define DAVINCI_MCASP_RXBUF_REG 0x280
+/* McASP FIFO Registers */
+#define DAVINCI_MCASP_WFIFOCTL (0x1010)
+#define DAVINCI_MCASP_WFIFOSTS (0x1014)
+#define DAVINCI_MCASP_RFIFOCTL (0x1018)
+#define DAVINCI_MCASP_RFIFOSTS (0x101C)
/*
* DAVINCI_MCASP_PWREMUMGT_REG - Power Down and Emulation Management
@@ -276,6 +281,13 @@
*/
#define TXDATADMADIS BIT(0)
+/*
+ * DAVINCI_MCASP_W[R]FIFOCTL - Write/Read FIFO Control Register bits
+ */
+#define FIFO_ENABLE BIT(16)
+#define NUMEVT_MASK (0xFF << 8)
+#define NUMDMA_MASK (0xFF)
+
#define DAVINCI_MCASP_NUM_SERIALIZER 16
static inline void mcasp_set_bits(void __iomem *reg, u32 val)
@@ -345,6 +357,9 @@ static void mcasp_start_rx(struct davinci_audio_dev *dev)
static void mcasp_start_tx(struct davinci_audio_dev *dev)
{
+ u8 offset = 0, i;
+ u32 cnt;
+
mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
@@ -353,6 +368,19 @@ static void mcasp_start_tx(struct davinci_audio_dev *dev)
mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
+ for (i = 0; i < dev->num_serializer; i++) {
+ if (dev->serial_dir[i] == TX_MODE) {
+ offset = i;
+ break;
+ }
+ }
+
+ /* wait for TX ready */
+ cnt = 0;
+ while (!(mcasp_get_reg(dev->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
+ TXSTATE) && (cnt < 100000))
+ cnt++;
+
mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
}
@@ -362,6 +390,13 @@ static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
mcasp_start_tx(dev);
else
mcasp_start_rx(dev);
+
+ /* enable FIFO */
+ if (dev->txnumevt)
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
+
+ if (dev->rxnumevt)
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
}
static void mcasp_stop_rx(struct davinci_audio_dev *dev)
@@ -382,6 +417,13 @@ static void davinci_mcasp_stop(struct davinci_audio_dev *dev, int stream)
mcasp_stop_tx(dev);
else
mcasp_stop_rx(dev);
+
+ /* disable FIFO */
+ if (dev->txnumevt)
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
+
+ if (dev->rxnumevt)
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
}
static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
@@ -401,7 +443,6 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x7 << 26));
break;
-
case SND_SOC_DAIFMT_CBM_CFM:
/* codec is clock and frame master */
mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
@@ -505,6 +546,8 @@ static int davinci_config_channel_size(struct davinci_audio_dev *dev,
static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
{
int i;
+ u8 tx_ser = 0;
+ u8 rx_ser = 0;
/* Default configuration */
mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
@@ -525,12 +568,37 @@ 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) {
mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
AXR(i));
- else if (dev->serial_dir[i] == RX_MODE)
+ tx_ser++;
+ } else if (dev->serial_dir[i] == RX_MODE) {
mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
AXR(i));
+ rx_ser++;
+ }
+ }
+
+ if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (dev->txnumevt * tx_ser > 64)
+ dev->txnumevt = 1;
+
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, tx_ser,
+ NUMDMA_MASK);
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
+ ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
+ }
+
+ if (dev->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
+ if (dev->rxnumevt * rx_ser > 64)
+ dev->rxnumevt = 1;
+
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, rx_ser,
+ NUMDMA_MASK);
+ mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
+ ((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
+ mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
}
}
@@ -543,6 +611,8 @@ static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
for (i = 0; i < active_slots; i++)
mask |= (1 << i);
+ mcasp_clr_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
+
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* bit stream is MSB first with no delay */
/* DSP_B mode */
@@ -622,8 +692,16 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
struct davinci_pcm_dma_params *dma_params =
dev->dma_params[substream->stream];
int word_length;
+ u8 numevt;
davinci_hw_common_param(dev, substream->stream);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ numevt = dev->txnumevt;
+ else
+ numevt = dev->rxnumevt;
+
+ if (!numevt)
+ numevt = 1;
if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
davinci_hw_dit_param(dev);
@@ -650,6 +728,13 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
return -EINVAL;
}
+
+ if (dev->version == MCASP_VERSION_2) {
+ dma_params->data_type *= numevt;
+ dma_params->acnt = 4 * numevt;
+ } else
+ dma_params->acnt = dma_params->data_type;
+
davinci_config_channel_size(dev, word_length);
return 0;
@@ -778,6 +863,9 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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;
dma_data[count].name = "I2S PCM Stereo out";
dma_data[count].eventq_no = pdata->eventq_no;
@@ -807,9 +895,9 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
}
dma_data[count].channel = res->start;
- davinci_mcasp_dai[pdev->id].private_data = dev;
- davinci_mcasp_dai[pdev->id].dev = &pdev->dev;
- ret = snd_soc_register_dai(&davinci_mcasp_dai[pdev->id]);
+ davinci_mcasp_dai[pdata->op_mode].private_data = dev;
+ davinci_mcasp_dai[pdata->op_mode].dev = &pdev->dev;
+ ret = snd_soc_register_dai(&davinci_mcasp_dai[pdata->op_mode]);
if (ret != 0)
goto err_release_region;
@@ -827,12 +915,13 @@ err_release_dev:
static int davinci_mcasp_remove(struct platform_device *pdev)
{
+ struct snd_platform_data *pdata = pdev->dev.platform_data;
struct davinci_pcm_dma_params *dma_data;
struct davinci_audio_dev *dev;
struct resource *mem;
- snd_soc_unregister_dai(&davinci_mcasp_dai[pdev->id]);
- dev = davinci_mcasp_dai[pdev->id].private_data;
+ snd_soc_unregister_dai(&davinci_mcasp_dai[pdata->op_mode]);
+ dev = davinci_mcasp_dai[pdata->op_mode].private_data;
clk_disable(dev->clk);
clk_put(dev->clk);
dev->clk = NULL;
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