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ASoC: Add PXA SSP support

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The SSP ports PXA series processors can be used to implement a variety of
audio interface formats. This patch implements support for I2S, DSP A and
DSP B modes on these ports.

This patch is based on the previous out of tree pxa2xx-ssp driver (which
was originally written by Liam Girdwood with updates from Philipp Zabel
and Nicola Perrino) and pxa3xx-ssp driver (originally written by Seth
Forsee based on the pxa2xx-ssp driver). Testing coverage is not complete
currently.

Tested-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2008-07-30 19:12:04 +01:00
parent 219b93f525
commit 1b340bd7e4
4 changed files with 991 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sound/soc/pxa/Kconfig
View File

@ -21,6 +21,9 @@ config SND_PXA2XX_SOC_AC97
config SND_PXA2XX_SOC_I2S config SND_PXA2XX_SOC_I2S
tristate tristate
config SND_PXA_SOC_SSP
tristate
config SND_PXA2XX_SOC_CORGI config SND_PXA2XX_SOC_CORGI
tristate "SoC Audio support for Sharp Zaurus SL-C7x0" tristate "SoC Audio support for Sharp Zaurus SL-C7x0"
depends on SND_PXA2XX_SOC && PXA_SHARP_C7xx depends on SND_PXA2XX_SOC && PXA_SHARP_C7xx
@ -75,3 +78,13 @@ config SND_PXA2XX_SOC_EM_X270
help help
Say Y if you want to add support for SoC audio on Say Y if you want to add support for SoC audio on
CompuLab EM-x270. CompuLab EM-x270.
config SND_SOC_ZYLONITE
tristate "SoC Audio support for Marvell Zylonite"
depends on SND_PXA2XX_SOC && MACH_ZYLONITE
select SND_PXA2XX_SOC_AC97
select SND_PXA_SOC_SSP
select SND_SOC_WM9713
help
Say Y if you want to add support for SoC audio on the
Marvell Zylonite reference platform.

2
sound/soc/pxa/Makefile
View File

@ -2,10 +2,12 @@
snd-soc-pxa2xx-objs := pxa2xx-pcm.o snd-soc-pxa2xx-objs := pxa2xx-pcm.o
snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o
snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o
snd-soc-pxa-ssp-objs := pxa-ssp.o
obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o
obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o
obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o
obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o
# PXA Machine Support # PXA Machine Support
snd-soc-corgi-objs := corgi.o snd-soc-corgi-objs := corgi.o

929
sound/soc/pxa/pxa-ssp.c Normal file
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@ -0,0 +1,929 @@
#define DEBUG
/*
* pxa-ssp.c -- ALSA Soc Audio Layer
*
* Copyright 2005,2008 Wolfson Microelectronics PLC.
* Author: Liam Girdwood
* Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* TODO:
* o Test network mode for > 16bit sample size
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>
#include <mach/hardware.h>
#include <mach/pxa-regs.h>
#include <mach/regs-ssp.h>
#include <mach/audio.h>
#include <mach/ssp.h>
#include "pxa2xx-pcm.h"
#include "pxa-ssp.h"
/*
* SSP audio private data
*/
struct ssp_priv {
struct ssp_dev dev;
unsigned int sysclk;
int dai_fmt;
#ifdef CONFIG_PM
struct ssp_state state;
#endif
};
#define PXA2xx_SSP1_BASE 0x41000000
#define PXA27x_SSP2_BASE 0x41700000
#define PXA27x_SSP3_BASE 0x41900000
#define PXA3xx_SSP4_BASE 0x41a00000
static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_out = {
.name = "SSP1 PCM Mono out",
.dev_addr = PXA2xx_SSP1_BASE + SSDR,
.drcmr = &DRCMR(14),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_in = {
.name = "SSP1 PCM Mono in",
.dev_addr = PXA2xx_SSP1_BASE + SSDR,
.drcmr = &DRCMR(13),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_out = {
.name = "SSP1 PCM Stereo out",
.dev_addr = PXA2xx_SSP1_BASE + SSDR,
.drcmr = &DRCMR(14),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_in = {
.name = "SSP1 PCM Stereo in",
.dev_addr = PXA2xx_SSP1_BASE + SSDR,
.drcmr = &DRCMR(13),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_out = {
.name = "SSP2 PCM Mono out",
.dev_addr = PXA27x_SSP2_BASE + SSDR,
.drcmr = &DRCMR(16),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_in = {
.name = "SSP2 PCM Mono in",
.dev_addr = PXA27x_SSP2_BASE + SSDR,
.drcmr = &DRCMR(15),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_out = {
.name = "SSP2 PCM Stereo out",
.dev_addr = PXA27x_SSP2_BASE + SSDR,
.drcmr = &DRCMR(16),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_in = {
.name = "SSP2 PCM Stereo in",
.dev_addr = PXA27x_SSP2_BASE + SSDR,
.drcmr = &DRCMR(15),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_out = {
.name = "SSP3 PCM Mono out",
.dev_addr = PXA27x_SSP3_BASE + SSDR,
.drcmr = &DRCMR(67),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_in = {
.name = "SSP3 PCM Mono in",
.dev_addr = PXA27x_SSP3_BASE + SSDR,
.drcmr = &DRCMR(66),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_out = {
.name = "SSP3 PCM Stereo out",
.dev_addr = PXA27x_SSP3_BASE + SSDR,
.drcmr = &DRCMR(67),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_in = {
.name = "SSP3 PCM Stereo in",
.dev_addr = PXA27x_SSP3_BASE + SSDR,
.drcmr = &DRCMR(66),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_out = {
.name = "SSP4 PCM Mono out",
.dev_addr = PXA3xx_SSP4_BASE + SSDR,
.drcmr = &DRCMR(67),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_in = {
.name = "SSP4 PCM Mono in",
.dev_addr = PXA3xx_SSP4_BASE + SSDR,
.drcmr = &DRCMR(66),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH2,
};
static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_out = {
.name = "SSP4 PCM Stereo out",
.dev_addr = PXA3xx_SSP4_BASE + SSDR,
.drcmr = &DRCMR(67),
.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
DCMD_BURST16 | DCMD_WIDTH4,
};
static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_in = {
.name = "SSP4 PCM Stereo in",
.dev_addr = PXA3xx_SSP4_BASE + SSDR,
.drcmr = &DRCMR(66),
.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
DCMD_BURST16 | DCMD_WIDTH4,
};
static void dump_registers(struct ssp_device *ssp)
{
dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
ssp_read_reg(ssp, SSCR0), ssp_read_reg(ssp, SSCR1),
ssp_read_reg(ssp, SSTO));
dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
ssp_read_reg(ssp, SSPSP), ssp_read_reg(ssp, SSSR),
ssp_read_reg(ssp, SSACD));
}
static struct pxa2xx_pcm_dma_params *ssp_dma_params[4][4] = {
{
&pxa_ssp1_pcm_mono_out, &pxa_ssp1_pcm_mono_in,
&pxa_ssp1_pcm_stereo_out, &pxa_ssp1_pcm_stereo_in,
},
{
&pxa_ssp2_pcm_mono_out, &pxa_ssp2_pcm_mono_in,
&pxa_ssp2_pcm_stereo_out, &pxa_ssp2_pcm_stereo_in,
},
{
&pxa_ssp3_pcm_mono_out, &pxa_ssp3_pcm_mono_in,
&pxa_ssp3_pcm_stereo_out, &pxa_ssp3_pcm_stereo_in,
},
{
&pxa_ssp4_pcm_mono_out, &pxa_ssp4_pcm_mono_in,
&pxa_ssp4_pcm_stereo_out, &pxa_ssp4_pcm_stereo_in,
},
};
static int pxa_ssp_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct ssp_priv *priv = cpu_dai->private_data;
int ret = 0;
if (!cpu_dai->active) {
ret = ssp_init(&priv->dev, cpu_dai->id + 1, SSP_NO_IRQ);
if (ret < 0)
return ret;
ssp_disable(&priv->dev);
}
return ret;
}
static void pxa_ssp_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct ssp_priv *priv = cpu_dai->private_data;
if (!cpu_dai->active) {
ssp_disable(&priv->dev);
ssp_exit(&priv->dev);
}
}
#ifdef CONFIG_PM
static int pxa_ssp_suspend(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct ssp_priv *priv = cpu_dai->private_data;
if (!cpu_dai->active)
return 0;
ssp_save_state(&priv->dev, &priv->state);
clk_disable(priv->dev.ssp->clk);
return 0;
}
static int pxa_ssp_resume(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct ssp_priv *priv = cpu_dai->private_data;
if (!cpu_dai->active)
return 0;
clk_enable(priv->dev.ssp->clk);
ssp_restore_state(&priv->dev, &priv->state);
ssp_enable(&priv->dev);
return 0;
}
#else
#define pxa_ssp_suspend NULL
#define pxa_ssp_resume NULL
#endif
/**
* ssp_set_clkdiv - set SSP clock divider
* @div: serial clock rate divider
*/
static void ssp_set_scr(struct ssp_dev *dev, u32 div)
{
struct ssp_device *ssp = dev->ssp;
u32 sscr0 = ssp_read_reg(dev->ssp, SSCR0) & ~SSCR0_SCR;
ssp_write_reg(ssp, SSCR0, (sscr0 | SSCR0_SerClkDiv(div)));
}
/*
* Set the SSP ports SYSCLK.
*/
static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
int val;
u32 sscr0 = ssp_read_reg(ssp, SSCR0) &
~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
dev_dbg(&ssp->pdev->dev,
"pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %d\n",
cpu_dai->id, clk_id, freq);
switch (clk_id) {
case PXA_SSP_CLK_NET_PLL:
sscr0 |= SSCR0_MOD;
break;
case PXA_SSP_CLK_PLL:
/* Internal PLL is fixed */
if (cpu_is_pxa25x())
priv->sysclk = 1843200;
else
priv->sysclk = 13000000;
break;
case PXA_SSP_CLK_EXT:
priv->sysclk = freq;
sscr0 |= SSCR0_ECS;
break;
case PXA_SSP_CLK_NET:
priv->sysclk = freq;
sscr0 |= SSCR0_NCS | SSCR0_MOD;
break;
case PXA_SSP_CLK_AUDIO:
priv->sysclk = 0;
ssp_set_scr(&priv->dev, 1);
sscr0 |= SSCR0_ADC;
break;
default:
return -ENODEV;
}
/* The SSP clock must be disabled when changing SSP clock mode
* on PXA2xx. On PXA3xx it must be enabled when doing so. */
if (!cpu_is_pxa3xx())
clk_disable(priv->dev.ssp->clk);
val = ssp_read_reg(ssp, SSCR0) | sscr0;
ssp_write_reg(ssp, SSCR0, val);
if (!cpu_is_pxa3xx())
clk_enable(priv->dev.ssp->clk);
return 0;
}
/*
* Set the SSP clock dividers.
*/
static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
int val;
switch (div_id) {
case PXA_SSP_AUDIO_DIV_ACDS:
val = (ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
ssp_write_reg(ssp, SSACD, val);
break;
case PXA_SSP_AUDIO_DIV_SCDB:
val = ssp_read_reg(ssp, SSACD);
val &= ~SSACD_SCDB;
#if defined(CONFIG_PXA3xx)
if (cpu_is_pxa3xx())
val &= ~SSACD_SCDX8;
#endif
switch (div) {
case PXA_SSP_CLK_SCDB_1:
val |= SSACD_SCDB;
break;
case PXA_SSP_CLK_SCDB_4:
break;
#if defined(CONFIG_PXA3xx)
case PXA_SSP_CLK_SCDB_8:
if (cpu_is_pxa3xx())
val |= SSACD_SCDX8;
else
return -EINVAL;
break;
#endif
default:
return -EINVAL;
}
ssp_write_reg(ssp, SSACD, val);
break;
case PXA_SSP_DIV_SCR:
ssp_set_scr(&priv->dev, div);
break;
default:
return -ENODEV;
}
return 0;
}
/*
* Configure the PLL frequency pxa27x and (afaik - pxa320 only)
*/
static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai,
int pll_id, unsigned int freq_in, unsigned int freq_out)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
u32 ssacd = ssp_read_reg(ssp, SSACD) & ~0x70;
#if defined(CONFIG_PXA3xx)
if (cpu_is_pxa3xx())
ssp_write_reg(ssp, SSACDD, 0);
#endif
switch (freq_out) {
case 5622000:
break;
case 11345000:
ssacd |= (0x1 << 4);
break;
case 12235000:
ssacd |= (0x2 << 4);
break;
case 14857000:
ssacd |= (0x3 << 4);
break;
case 32842000:
ssacd |= (0x4 << 4);
break;
case 48000000:
ssacd |= (0x5 << 4);
break;
case 0:
/* Disable */
break;
default:
#ifdef CONFIG_PXA3xx
/* PXA3xx has a clock ditherer which can be used to generate
* a wider range of frequencies - calculate a value for it.
*/
if (cpu_is_pxa3xx()) {
u32 val;
u64 tmp = 19968;
tmp *= 1000000;
do_div(tmp, freq_out);
val = tmp;
val = (val << 16) | 64;;
ssp_write_reg(ssp, SSACDD, val);
ssacd |= (0x6 << 4);
dev_dbg(&ssp->pdev->dev,
"Using SSACDD %x to supply %dHz\n",
val, freq_out);
break;
}
#endif
return -EINVAL;
}
ssp_write_reg(ssp, SSACD, ssacd);
return 0;
}
/*
* Set the active slots in TDM/Network mode
*/
static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
unsigned int mask, int slots)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
u32 sscr0;
sscr0 = ssp_read_reg(ssp, SSCR0) & ~SSCR0_SlotsPerFrm(7);
/* set number of active slots */
sscr0 |= SSCR0_SlotsPerFrm(slots);
ssp_write_reg(ssp, SSCR0, sscr0);
/* set active slot mask */
ssp_write_reg(ssp, SSTSA, mask);
ssp_write_reg(ssp, SSRSA, mask);
return 0;
}
/*
* Tristate the SSP DAI lines
*/
static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
int tristate)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
u32 sscr1;
sscr1 = ssp_read_reg(ssp, SSCR1);
if (tristate)
sscr1 &= ~SSCR1_TTE;
else
sscr1 |= SSCR1_TTE;
ssp_write_reg(ssp, SSCR1, sscr1);
return 0;
}
/*
* Set up the SSP DAI format.
* The SSP Port must be inactive before calling this function as the
* physical interface format is changed.
*/
static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
u32 sscr0;
u32 sscr1;
u32 sspsp;
/* reset port settings */
sscr0 = ssp_read_reg(ssp, SSCR0) &
(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
sspsp = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR;
break;
case SND_SOC_DAIFMT_CBM_CFS:
sscr1 |= SSCR1_SCLKDIR;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
ssp_write_reg(ssp, SSCR0, sscr0);
ssp_write_reg(ssp, SSCR1, sscr1);
ssp_write_reg(ssp, SSPSP, sspsp);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
sscr0 |= SSCR0_MOD | SSCR0_PSP;
sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
sspsp |= SSPSP_FSRT;
break;
case SND_SOC_DAIFMT_NB_IF:
sspsp |= SSPSP_SFRMP | SSPSP_FSRT;
break;
case SND_SOC_DAIFMT_IB_IF:
sspsp |= SSPSP_SFRMP;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_DSP_A:
sspsp |= SSPSP_FSRT;
case SND_SOC_DAIFMT_DSP_B:
sscr0 |= SSCR0_MOD | SSCR0_PSP;
sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
sspsp |= SSPSP_SFRMP;
break;
case SND_SOC_DAIFMT_IB_IF:
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
ssp_write_reg(ssp, SSCR0, sscr0);
ssp_write_reg(ssp, SSCR1, sscr1);
ssp_write_reg(ssp, SSPSP, sspsp);
dump_registers(ssp);
/* Since we are configuring the timings for the format by hand
* we have to defer some things until hw_params() where we
* know parameters like the sample size.
*/
priv->dai_fmt = fmt;
return 0;
}
/*
* Set the SSP audio DMA parameters and sample size.
* Can be called multiple times by oss emulation.
*/
static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
int dma = 0, chn = params_channels(params);
u32 sscr0;
u32 sspsp;
int width = snd_pcm_format_physical_width(params_format(params));
/* select correct DMA params */
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
dma = 1; /* capture DMA offset is 1,3 */
if (chn == 2)
dma += 2; /* stereo DMA offset is 2, mono is 0 */
cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
/* we can only change the settings if the port is not in use */
if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
return 0;
/* clear selected SSP bits */
sscr0 = ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
ssp_write_reg(ssp, SSCR0, sscr0);
/* bit size */
sscr0 = ssp_read_reg(ssp, SSCR0);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
#ifdef CONFIG_PXA3xx
if (cpu_is_pxa3xx())
sscr0 |= SSCR0_FPCKE;
#endif
sscr0 |= SSCR0_DataSize(16);
if (params_channels(params) > 1)
sscr0 |= SSCR0_EDSS;
break;
case SNDRV_PCM_FORMAT_S24_LE:
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
/* we must be in network mode (2 slots) for 24 bit stereo */
break;
case SNDRV_PCM_FORMAT_S32_LE:
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
/* we must be in network mode (2 slots) for 32 bit stereo */
break;
}
ssp_write_reg(ssp, SSCR0, sscr0);
switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* Cleared when the DAI format is set */
sspsp = ssp_read_reg(ssp, SSPSP) | SSPSP_SFRMWDTH(width);
ssp_write_reg(ssp, SSPSP, sspsp);
break;
default:
break;
}
/* We always use a network mode so we always require TDM slots
* - complain loudly and fail if they've not been set up yet.
*/
if (!(ssp_read_reg(ssp, SSTSA) & 0xf)) {
dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
return -EINVAL;
}
dump_registers(ssp);
return 0;
}
static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int ret = 0;
struct ssp_priv *priv = cpu_dai->private_data;
struct ssp_device *ssp = priv->dev.ssp;
int val;
switch (cmd) {
case SNDRV_PCM_TRIGGER_RESUME:
ssp_enable(&priv->dev);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
val = ssp_read_reg(ssp, SSCR1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
val |= SSCR1_TSRE;
else
val |= SSCR1_RSRE;
ssp_write_reg(ssp, SSCR1, val);
val = ssp_read_reg(ssp, SSSR);
ssp_write_reg(ssp, SSSR, val);
break;
case SNDRV_PCM_TRIGGER_START:
val = ssp_read_reg(ssp, SSCR1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
val |= SSCR1_TSRE;
else
val |= SSCR1_RSRE;
ssp_write_reg(ssp, SSCR1, val);
ssp_enable(&priv->dev);
break;
case SNDRV_PCM_TRIGGER_STOP:
val = ssp_read_reg(ssp, SSCR1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
val &= ~SSCR1_TSRE;
else
val &= ~SSCR1_RSRE;
ssp_write_reg(ssp, SSCR1, val);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
ssp_disable(&priv->dev);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
val = ssp_read_reg(ssp, SSCR1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
val &= ~SSCR1_TSRE;
else
val &= ~SSCR1_RSRE;
ssp_write_reg(ssp, SSCR1, val);
break;
default:
ret = -EINVAL;
}
dump_registers(ssp);
return ret;
}
static int pxa_ssp_probe(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct ssp_priv *priv;
int ret;
priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev.ssp = ssp_request(dai->id, "SoC audio");
if (priv->dev.ssp == NULL) {
ret = -ENODEV;
goto err_priv;
}
dai->private_data = priv;
return 0;
err_priv:
kfree(priv);
return ret;
}
static void pxa_ssp_remove(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct ssp_priv *priv = dai->private_data;
ssp_free(priv->dev.ssp);
}
#define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
struct snd_soc_dai pxa_ssp_dai[] = {
{
.name = "pxa2xx-ssp1",
.id = 0,
.type = SND_SOC_DAI_PCM,
.probe = pxa_ssp_probe,
.remove = pxa_ssp_remove,
.suspend = pxa_ssp_suspend,
.resume = pxa_ssp_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.ops = {
.startup = pxa_ssp_startup,
.shutdown = pxa_ssp_shutdown,
.trigger = pxa_ssp_trigger,
.hw_params = pxa_ssp_hw_params,
},
.dai_ops = {
.set_sysclk = pxa_ssp_set_dai_sysclk,
.set_clkdiv = pxa_ssp_set_dai_clkdiv,
.set_pll = pxa_ssp_set_dai_pll,
.set_fmt = pxa_ssp_set_dai_fmt,
.set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
.set_tristate = pxa_ssp_set_dai_tristate,
},
},
{ .name = "pxa2xx-ssp2",
.id = 1,
.type = SND_SOC_DAI_PCM,
.probe = pxa_ssp_probe,
.remove = pxa_ssp_remove,
.suspend = pxa_ssp_suspend,
.resume = pxa_ssp_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.ops = {
.startup = pxa_ssp_startup,
.shutdown = pxa_ssp_shutdown,
.trigger = pxa_ssp_trigger,
.hw_params = pxa_ssp_hw_params,
},
.dai_ops = {
.set_sysclk = pxa_ssp_set_dai_sysclk,
.set_clkdiv = pxa_ssp_set_dai_clkdiv,
.set_pll = pxa_ssp_set_dai_pll,
.set_fmt = pxa_ssp_set_dai_fmt,
.set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
.set_tristate = pxa_ssp_set_dai_tristate,
},
},
{
.name = "pxa2xx-ssp3",
.id = 2,
.type = SND_SOC_DAI_PCM,
.probe = pxa_ssp_probe,
.remove = pxa_ssp_remove,
.suspend = pxa_ssp_suspend,
.resume = pxa_ssp_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.ops = {
.startup = pxa_ssp_startup,
.shutdown = pxa_ssp_shutdown,
.trigger = pxa_ssp_trigger,
.hw_params = pxa_ssp_hw_params,
},
.dai_ops = {
.set_sysclk = pxa_ssp_set_dai_sysclk,
.set_clkdiv = pxa_ssp_set_dai_clkdiv,
.set_pll = pxa_ssp_set_dai_pll,
.set_fmt = pxa_ssp_set_dai_fmt,
.set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
.set_tristate = pxa_ssp_set_dai_tristate,
},
},
{
.name = "pxa2xx-ssp4",
.id = 3,
.type = SND_SOC_DAI_PCM,
.probe = pxa_ssp_probe,
.remove = pxa_ssp_remove,
.suspend = pxa_ssp_suspend,
.resume = pxa_ssp_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = PXA_SSP_RATES,
.formats = PXA_SSP_FORMATS,
},
.ops = {
.startup = pxa_ssp_startup,
.shutdown = pxa_ssp_shutdown,
.trigger = pxa_ssp_trigger,
.hw_params = pxa_ssp_hw_params,
},
.dai_ops = {
.set_sysclk = pxa_ssp_set_dai_sysclk,
.set_clkdiv = pxa_ssp_set_dai_clkdiv,
.set_pll = pxa_ssp_set_dai_pll,
.set_fmt = pxa_ssp_set_dai_fmt,
.set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
.set_tristate = pxa_ssp_set_dai_tristate,
},
},
};
EXPORT_SYMBOL_GPL(pxa_ssp_dai);
/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
MODULE_LICENSE("GPL");

47
sound/soc/pxa/pxa-ssp.h Normal file
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/*
* ASoC PXA SSP port support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _PXA_SSP_H
#define _PXA_SSP_H
/* pxa DAI SSP IDs */
#define PXA_DAI_SSP1 0
#define PXA_DAI_SSP2 1
#define PXA_DAI_SSP3 2
#define PXA_DAI_SSP4 3
/* SSP clock sources */
#define PXA_SSP_CLK_PLL 0
#define PXA_SSP_CLK_EXT 1
#define PXA_SSP_CLK_NET 2
#define PXA_SSP_CLK_AUDIO 3
#define PXA_SSP_CLK_NET_PLL 4
/* SSP audio dividers */
#define PXA_SSP_AUDIO_DIV_ACDS 0
#define PXA_SSP_AUDIO_DIV_SCDB 1
#define PXA_SSP_DIV_SCR 2
/* SSP ACDS audio dividers values */
#define PXA_SSP_CLK_AUDIO_DIV_1 0
#define PXA_SSP_CLK_AUDIO_DIV_2 1
#define PXA_SSP_CLK_AUDIO_DIV_4 2
#define PXA_SSP_CLK_AUDIO_DIV_8 3
#define PXA_SSP_CLK_AUDIO_DIV_16 4
#define PXA_SSP_CLK_AUDIO_DIV_32 5
/* SSP divider bypass */
#define PXA_SSP_CLK_SCDB_4 0
#define PXA_SSP_CLK_SCDB_1 1
#define PXA_SSP_CLK_SCDB_8 2
#define PXA_SSP_PLL_OUT 0
extern struct snd_soc_dai pxa_ssp_dai[4];
#endif