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[ALSA] ASoC AT91xxxx - SSC port DSP support 

This patch series by Frank Madarino updates the AT91xxxx core to add
DSP/PCM audio hardware formats.
Changes:-
 o Rename at19-i2s.c -> at91-ssc.c
 o Rename at91-i2s.h -> at91-ssc.h
 o Add DSP hardware formats.
 o Rename various I2S labels to SSC

Signed-off-by: Frank Mandarino <fmandarino@endrelia.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Frank Mandarino 2007-04-16 17:18:52 +02:00 committed by Jaroslav Kysela
parent 1e39221eba
commit 36b8a8bbb4
2 changed files with 170 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

255
sound/soc/at91/at91-i2s.c → sound/soc/at91/at91-ssc.c
View File

@ -1,5 +1,5 @@
/*
* 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.
@ -25,6 +25,7 @@
#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>
@ -33,10 +34,10 @@
#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
@ -92,33 +93,33 @@ static struct at91_ssc_mask ssc_rx_mask = {
*/
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,
}},
@ -171,13 +172,13 @@ static struct at91_ssc_info {
#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;
@ -209,13 +210,13 @@ static irqreturn_t at91_i2s_interrupt(int irq, void *dev_id)
/*
* 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;
@ -234,7 +235,7 @@ static int at91_i2s_startup(struct snd_pcm_substream *substream)
* 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];
@ -281,7 +282,7 @@ static void at91_i2s_shutdown(struct snd_pcm_substream *substream)
/*
* 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)
{
/*
@ -291,7 +292,7 @@ static int at91_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
*/
switch (clk_id) {
case AT91_SYSCLK_MCK:
at91_i2s_sysclk = freq;
at91_ssc_sysclk = freq;
break;
default:
return -EINVAL;
@ -303,14 +304,11 @@ static int at91_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
/*
* 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;
}
@ -318,7 +316,7 @@ static int at91_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
/*
* 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];
@ -355,7 +353,7 @@ static int at91_i2s_set_dai_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
/*
* 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;
@ -391,20 +389,50 @@ static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
channels = params_channels(params);
/*
* 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.
* Determine sample size in bits and the PDC increment.
*/
bits = 16;
dma_params->pdc_xfer_size = 2;
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.
*/
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.
@ -441,10 +469,9 @@ static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
| (((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
@ -490,10 +517,51 @@ static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
| (((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;
@ -518,9 +586,9 @@ static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
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);
@ -546,7 +614,7 @@ static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
}
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];
@ -566,7 +634,7 @@ static int at91_i2s_prepare(struct snd_pcm_substream *substream)
#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;
@ -594,7 +662,7 @@ static int at91_i2s_suspend(struct platform_device *pdev,
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;
@ -620,102 +688,105 @@ static int at91_i2s_resume(struct platform_device *pdev,
}
#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");

14
sound/soc/at91/at91-i2s.h → sound/soc/at91/at91-ssc.h
View File

@ -1,5 +1,5 @@
/*
* at91-i2s.h - ALSA I2S interface for the Atmel AT91 SoC
* at91-ssc.h - ALSA SSC interface for the Atmel AT91 SoC
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
@ -10,18 +10,18 @@
* published by the Free Software Foundation.
*/
#ifndef _AT91_I2S_H
#define _AT91_I2S_H
#ifndef _AT91_SSC_H
#define _AT91_SSC_H
/* I2S system clock ids */
/* SSC system clock ids */
#define AT91_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */
/* I2S divider ids */
/* SSC divider ids */
#define AT91SSC_CMR_DIV 0 /* MCK divider for BCLK */
#define AT91SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */
#define AT91SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */
extern struct snd_soc_cpu_dai at91_i2s_dai[];
extern struct snd_soc_cpu_dai at91_ssc_dai[];
#endif /* _AT91_I2S_H */
#endif /* _AT91_SSC_H */