/*
- * at91-i2s.c -- ALSA SoC I2S Audio Layer Platform driver
+ * at91-ssc.c -- ALSA SoC AT91 SSC Audio Layer Platform driver
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
+#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/arch/at91_ssc.h>
#include "at91-pcm.h"
-#include "at91-i2s.h"
+#include "at91-ssc.h"
#if 0
-#define DBG(x...) printk(KERN_DEBUG "at91-i2s:" x)
+#define DBG(x...) printk(KERN_DEBUG "at91-ssc:" x)
#else
#define DBG(x...)
#endif
*/
static struct at91_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
{{
- .name = "SSC0/I2S PCM Stereo out",
+ .name = "SSC0 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
- .name = "SSC0/I2S PCM Stereo in",
+ .name = "SSC0 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
#if NUM_SSC_DEVICES == 3
{{
- .name = "SSC1/I2S PCM Stereo out",
+ .name = "SSC1 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
- .name = "SSC1/I2S PCM Stereo in",
+ .name = "SSC1 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
{{
- .name = "SSC2/I2S PCM Stereo out",
+ .name = "SSC2 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
- .name = "SSC1/I2S PCM Stereo in",
+ .name = "SSC2 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
#endif
};
-static unsigned int at91_i2s_sysclk;
+static unsigned int at91_ssc_sysclk;
/*
* SSC interrupt handler. Passes PDC interrupts to the DMA
* interrupt handler in the PCM driver.
*/
-static irqreturn_t at91_i2s_interrupt(int irq, void *dev_id)
+static irqreturn_t at91_ssc_interrupt(int irq, void *dev_id)
{
struct at91_ssc_info *ssc_p = dev_id;
struct at91_pcm_dma_params *dma_params;
/*
* Startup. Only that one substream allowed in each direction.
*/
-static int at91_i2s_startup(struct snd_pcm_substream *substream)
+static int at91_ssc_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
int dir_mask;
- DBG("i2s_startup: SSC_SR=0x%08lx\n",
+ DBG("ssc_startup: SSC_SR=0x%08lx\n",
at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
dir_mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0x1 : 0x2;
* Shutdown. Clear DMA parameters and shutdown the SSC if there
* are no other substreams open.
*/
-static void at91_i2s_shutdown(struct snd_pcm_substream *substream)
+static void at91_ssc_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
/*
* Record the SSC system clock rate.
*/
-static int at91_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
+static int at91_ssc_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
/*
*/
switch (clk_id) {
case AT91_SYSCLK_MCK:
- at91_i2s_sysclk = freq;
+ at91_ssc_sysclk = freq;
break;
default:
return -EINVAL;
/*
* Record the DAI format for use in hw_params().
*/
-static int at91_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
+static int at91_ssc_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
unsigned int fmt)
{
struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
- if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S)
- return -EINVAL;
-
ssc_p->daifmt = fmt;
return 0;
}
/*
* Record SSC clock dividers for use in hw_params().
*/
-static int at91_i2s_set_dai_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
+static int at91_ssc_set_dai_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
int div_id, int div)
{
struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
/*
* Configure the SSC.
*/
-static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
+static int at91_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
channels = params_channels(params);
+ /*
+ * Determine sample size in bits and the PDC increment.
+ */
+ switch(params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ bits = 8;
+ dma_params->pdc_xfer_size = 1;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ bits = 16;
+ dma_params->pdc_xfer_size = 2;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ bits = 24;
+ dma_params->pdc_xfer_size = 4;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ bits = 32;
+ dma_params->pdc_xfer_size = 4;
+ break;
+ default:
+ printk(KERN_WARNING "at91-ssc: unsupported PCM format");
+ return -EINVAL;
+ }
+
/*
* The SSC only supports up to 16-bit samples in I2S format, due
- * to the size of the Frame Mode Register FSLEN field. Also, I2S
- * implies signed data.
+ * to the size of the Frame Mode Register FSLEN field.
*/
- bits = 16;
- dma_params->pdc_xfer_size = 2;
+ if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
+ && bits > 16) {
+ printk(KERN_WARNING
+ "at91-ssc: sample size %d is too large for I2S\n", bits);
+ return -EINVAL;
+ }
/*
* Compute SSC register settings.
*/
- switch (ssc_p->daifmt) {
- case SND_SOC_DAIFMT_CBS_CFS:
+ switch (ssc_p->daifmt
+ & (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
+
+ case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
- * SSC provides BCLK and LRC clocks.
+ * I2S format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line.
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
break;
- case SND_SOC_DAIFMT_CBM_CFM:
-
+ case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
/*
- * CODEC supplies BCLK and LRC clocks.
+ * I2S format, CODEC supplies BCLK and LRC clocks.
*
* The SSC transmit clock is obtained from the BCLK signal on
* on the TK line, and the SSC receive clock is generated from the
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
break;
- case SND_SOC_DAIFMT_CBS_CFM:
- case SND_SOC_DAIFMT_CBM_CFS:
+ case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
+ /*
+ * DSP/PCM Mode A format, SSC provides BCLK and LRC clocks.
+ *
+ * The SSC transmit and receive clocks are generated from the
+ * MCK divider, and the BCLK signal is output on the SSC TK line.
+ */
+ rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
+ | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
+
+ rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
+ | (( 0 << 16) & AT91_SSC_FSLEN)
+ | (((channels - 1) << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_LOOP)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+
+ tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
+ | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
+
+ tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( 0 << 23) & AT91_SSC_FSDEN)
+ | (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
+ | (( 0 << 16) & AT91_SSC_FSLEN)
+ | (((channels - 1) << 8) & AT91_SSC_DATNB)
+ | (( 1 << 7) & AT91_SSC_MSBF)
+ | (( 0 << 5) & AT91_SSC_DATDEF)
+ | (((bits - 1) << 0) & AT91_SSC_DATALEN);
+
+
+
+ break;
+
+ case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
default:
- printk(KERN_WARNING "at91-i2s: unsupported DAI format 0x%x.\n",
+ printk(KERN_WARNING "at91-ssc: unsupported DAI format 0x%x.\n",
ssc_p->daifmt);
return -EINVAL;
break;
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNPR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNCR, 0);
- if ((ret = request_irq(ssc_p->ssc.pid, at91_i2s_interrupt,
+ if ((ret = request_irq(ssc_p->ssc.pid, at91_ssc_interrupt,
0, ssc_p->name, ssc_p)) < 0) {
- printk(KERN_WARNING "at91-i2s: request_irq failure\n");
+ printk(KERN_WARNING "at91-ssc: request_irq failure\n");
DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
}
-static int at91_i2s_prepare(struct snd_pcm_substream *substream)
+static int at91_ssc_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
#ifdef CONFIG_PM
-static int at91_i2s_suspend(struct platform_device *pdev,
+static int at91_ssc_suspend(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai)
{
struct at91_ssc_info *ssc_p;
return 0;
}
-static int at91_i2s_resume(struct platform_device *pdev,
+static int at91_ssc_resume(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai)
{
struct at91_ssc_info *ssc_p;
}
#else
-#define at91_i2s_suspend NULL
-#define at91_i2s_resume NULL
+#define at91_ssc_suspend NULL
+#define at91_ssc_resume NULL
#endif
-#define AT91_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+#define AT91_SSC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
SNDRV_PCM_RATE_96000)
-struct snd_soc_cpu_dai at91_i2s_dai[NUM_SSC_DEVICES] = {
- { .name = "at91_ssc0/i2s",
+#define AT91_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+struct snd_soc_cpu_dai at91_ssc_dai[NUM_SSC_DEVICES] = {
+ { .name = "at91-ssc0",
.id = 0,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91_i2s_suspend,
- .resume = at91_i2s_resume,
+ .type = SND_SOC_DAI_PCM,
+ .suspend = at91_ssc_suspend,
+ .resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.ops = {
- .startup = at91_i2s_startup,
- .shutdown = at91_i2s_shutdown,
- .prepare = at91_i2s_prepare,
- .hw_params = at91_i2s_hw_params,},
+ .startup = at91_ssc_startup,
+ .shutdown = at91_ssc_shutdown,
+ .prepare = at91_ssc_prepare,
+ .hw_params = at91_ssc_hw_params,},
.dai_ops = {
- .set_sysclk = at91_i2s_set_dai_sysclk,
- .set_fmt = at91_i2s_set_dai_fmt,
- .set_clkdiv = at91_i2s_set_dai_clkdiv,},
+ .set_sysclk = at91_ssc_set_dai_sysclk,
+ .set_fmt = at91_ssc_set_dai_fmt,
+ .set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[0].ssc,
},
#if NUM_SSC_DEVICES == 3
- { .name = "at91_ssc1/i2s",
+ { .name = "at91-ssc1",
.id = 1,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91_i2s_suspend,
- .resume = at91_i2s_resume,
+ .type = SND_SOC_DAI_PCM,
+ .suspend = at91_ssc_suspend,
+ .resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.ops = {
- .startup = at91_i2s_startup,
- .shutdown = at91_i2s_shutdown,
- .prepare = at91_i2s_prepare,
- .hw_params = at91_i2s_hw_params,},
+ .startup = at91_ssc_startup,
+ .shutdown = at91_ssc_shutdown,
+ .prepare = at91_ssc_prepare,
+ .hw_params = at91_ssc_hw_params,},
.dai_ops = {
- .set_sysclk = at91_i2s_set_dai_sysclk,
- .set_fmt = at91_i2s_set_dai_fmt,
- .set_clkdiv = at91_i2s_set_dai_clkdiv,},
+ .set_sysclk = at91_ssc_set_dai_sysclk,
+ .set_fmt = at91_ssc_set_dai_fmt,
+ .set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[1].ssc,
},
- { .name = "at91_ssc2/i2s",
+ { .name = "at91-ssc2",
.id = 2,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91_i2s_suspend,
- .resume = at91_i2s_resume,
+ .type = SND_SOC_DAI_PCM,
+ .suspend = at91_ssc_suspend,
+ .resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
- .rates = AT91_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .rates = AT91_SSC_RATES,
+ .formats = AT91_SSC_FORMATS,},
.ops = {
- .startup = at91_i2s_startup,
- .shutdown = at91_i2s_shutdown,
- .prepare = at91_i2s_prepare,
- .hw_params = at91_i2s_hw_params,},
+ .startup = at91_ssc_startup,
+ .shutdown = at91_ssc_shutdown,
+ .prepare = at91_ssc_prepare,
+ .hw_params = at91_ssc_hw_params,},
.dai_ops = {
- .set_sysclk = at91_i2s_set_dai_sysclk,
- .set_fmt = at91_i2s_set_dai_fmt,
- .set_clkdiv = at91_i2s_set_dai_clkdiv,},
+ .set_sysclk = at91_ssc_set_dai_sysclk,
+ .set_fmt = at91_ssc_set_dai_fmt,
+ .set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[2].ssc,
},
#endif
};
-EXPORT_SYMBOL_GPL(at91_i2s_dai);
+EXPORT_SYMBOL_GPL(at91_ssc_dai);
/* Module information */
MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
-MODULE_DESCRIPTION("AT91 I2S ASoC Interface");
+MODULE_DESCRIPTION("AT91 SSC ASoC Interface");
MODULE_LICENSE("GPL");
projects / linux-2.6 / commitdiff