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ASoC: davinci-mcasp: Data source (bus) selection support 

The audio data to/from McASP can be sent/received via two method:
Via the data port (preferred) or via the configuration bus.
Currently the driver assumes that all data communication will be done via
the data port.
This patch adds support for selecting the configuration port as data
interface.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Peter Ujfalusi 2013-11-14 11:35:32 +02:00 committed by Mark Brown
parent 487dce8823
commit cbc7956c81
1 changed files with 28 additions and 10 deletions
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38
sound/soc/davinci/davinci-mcasp.c
View File

@ -53,6 +53,8 @@ struct davinci_mcasp {
u8 txnumevt;
u8 rxnumevt;
bool dat_port;
#ifdef CONFIG_PM_SLEEP
struct {
u32 txfmtctl;
@ -482,6 +484,7 @@ static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
{
int i, active_slots;
u32 mask = 0;
u32 busel = 0;
active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
for (i = 0; i < active_slots; i++)
@ -489,11 +492,15 @@ static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
if (!mcasp->dat_port)
busel = TXSEL;
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* bit stream is MSB first with no delay */
/* DSP_B mode */
mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXTDM_REG, mask);
mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
busel | TXORD);
if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMCTL_REG,
@ -504,7 +511,8 @@ static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
} else {
/* bit stream is MSB first with no delay */
/* DSP_B mode */
mcasp_set_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
mcasp_set_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
busel | RXORD);
mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXTDM_REG, mask);
if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
@ -928,23 +936,22 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
mcasp->version = pdata->version;
mcasp->txnumevt = pdata->txnumevt;
mcasp->rxnumevt = pdata->rxnumevt;
if (mcasp->version < MCASP_VERSION_3)
mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
else
mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
mcasp->dev = &pdev->dev;
dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
if (!dat)
dat = mem;
if (dat)
mcasp->dat_port = true;
dma_data = &mcasp->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 = dat->start + pdata->tx_dma_offset;
if (dat)
dma_data->dma_addr = dat->start;
else
dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (res)
@ -957,7 +964,18 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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 = dat->start + pdata->rx_dma_offset;
if (dat)
dma_data->dma_addr = dat->start;
else
dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
if (mcasp->version < MCASP_VERSION_3) {
mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
/* dma_data->dma_addr is pointing to the data port address */
mcasp->dat_port = true;
} else {
mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
}
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (res)