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ubuntu-linux-kernel/sound/soc/pxa/mmp-sspa.c

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/*
* linux/sound/soc/pxa/mmp-sspa.c
* Base on pxa2xx-ssp.c
*
* Copyright (C) 2011 Marvell International Ltd.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/pxa2xx_ssp.h>
#include <linux/io.h>
#include <linux/dmaengine.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 <sound/dmaengine_pcm.h>
#include "mmp-sspa.h"
/*
* SSPA audio private data
*/
struct sspa_priv {
struct ssp_device *sspa;
struct snd_dmaengine_dai_dma_data *dma_params;
struct clk *audio_clk;
struct clk *sysclk;
int dai_fmt;
int running_cnt;
};
static void mmp_sspa_write_reg(struct ssp_device *sspa, u32 reg, u32 val)
{
__raw_writel(val, sspa->mmio_base + reg);
}
static u32 mmp_sspa_read_reg(struct ssp_device *sspa, u32 reg)
{
return __raw_readl(sspa->mmio_base + reg);
}
static void mmp_sspa_tx_enable(struct ssp_device *sspa)
{
unsigned int sspa_sp;
sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
sspa_sp |= SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
}
static void mmp_sspa_tx_disable(struct ssp_device *sspa)
{
unsigned int sspa_sp;
sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
sspa_sp &= ~SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
}
static void mmp_sspa_rx_enable(struct ssp_device *sspa)
{
unsigned int sspa_sp;
sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
sspa_sp |= SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
}
static void mmp_sspa_rx_disable(struct ssp_device *sspa)
{
unsigned int sspa_sp;
sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
sspa_sp &= ~SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
}
static int mmp_sspa_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
clk_enable(priv->sysclk);
clk_enable(priv->sspa->clk);
return 0;
}
static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
clk_disable(priv->sspa->clk);
clk_disable(priv->sysclk);
}
/*
* Set the SSP ports SYSCLK.
*/
static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
int ret = 0;
switch (clk_id) {
case MMP_SSPA_CLK_AUDIO:
ret = clk_set_rate(priv->audio_clk, freq);
if (ret)
return ret;
break;
case MMP_SSPA_CLK_PLL:
case MMP_SSPA_CLK_VCXO:
/* not support yet */
return -EINVAL;
default:
return -EINVAL;
}
return 0;
}
static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
int source, unsigned int freq_in,
unsigned int freq_out)
{
struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
int ret = 0;
switch (pll_id) {
case MMP_SYSCLK:
ret = clk_set_rate(priv->sysclk, freq_out);
if (ret)
return ret;
break;
case MMP_SSPA_CLK:
ret = clk_set_rate(priv->sspa->clk, freq_out);
if (ret)
return ret;
break;
default:
return -ENODEV;
}
return 0;
}
/*
* Set up the sspa dai format. The sspa port must be inactive
* before calling this function as the physical
* interface format is changed.
*/
static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(cpu_dai);
struct ssp_device *sspa = sspa_priv->sspa;
u32 sspa_sp, sspa_ctrl;
/* check if we need to change anything at all */
if (sspa_priv->dai_fmt == fmt)
return 0;
/* we can only change the settings if the port is not in use */
if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) ||
(mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) {
dev_err(&sspa->pdev->dev,
"can't change hardware dai format: stream is in use\n");
return -EINVAL;
}
/* reset port settings */
sspa_sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
sspa_ctrl = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
sspa_sp |= SSPA_SP_MSL;
break;
case SND_SOC_DAIFMT_CBM_CFM:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
sspa_sp |= SSPA_SP_FSP;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
sspa_sp |= SSPA_TXSP_FPER(63);
sspa_sp |= SSPA_SP_FWID(31);
sspa_ctrl |= SSPA_CTL_XDATDLY(1);
break;
default:
return -EINVAL;
}
mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
sspa_sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
/*
* FIXME: hw issue, for the tx serial port,
* can not config the master/slave mode;
* so must clean this bit.
* The master/slave mode has been set in the
* rx port.
*/
sspa_sp &= ~SSPA_SP_MSL;
mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
/* 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.
*/
sspa_priv->dai_fmt = fmt;
return 0;
}
/*
* Set the SSPA audio DMA parameters and sample size.
* Can be called multiple times by oss emulation.
*/
static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
struct ssp_device *sspa = sspa_priv->sspa;
struct snd_dmaengine_dai_dma_data *dma_params;
u32 sspa_ctrl;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_TXCTL);
else
sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_RXCTL);
sspa_ctrl &= ~SSPA_CTL_XFRLEN1_MASK;
sspa_ctrl |= SSPA_CTL_XFRLEN1(params_channels(params) - 1);
sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
sspa_ctrl |= SSPA_CTL_XWDLEN1(SSPA_CTL_32_BITS);
sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_8_BITS);
break;
case SNDRV_PCM_FORMAT_S16_LE:
sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_16_BITS);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_20_BITS);
break;
case SNDRV_PCM_FORMAT_S24_3LE:
sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_24_BITS);
break;
case SNDRV_PCM_FORMAT_S32_LE:
sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_32_BITS);
break;
default:
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1);
} else {
mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0);
}
dma_params = &sspa_priv->dma_params[substream->stream];
dma_params->addr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
(sspa->phys_base + SSPA_TXD) :
(sspa->phys_base + SSPA_RXD);
snd_soc_dai_set_dma_data(cpu_dai, substream, dma_params);
return 0;
}
static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
struct ssp_device *sspa = sspa_priv->sspa;
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
/*
* whatever playback or capture, must enable rx.
* this is a hw issue, so need check if rx has been
* enabled or not; if has been enabled by another
* stream, do not enable again.
*/
if (!sspa_priv->running_cnt)
mmp_sspa_rx_enable(sspa);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mmp_sspa_tx_enable(sspa);
sspa_priv->running_cnt++;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
sspa_priv->running_cnt--;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mmp_sspa_tx_disable(sspa);
/* have no capture stream, disable rx port */
if (!sspa_priv->running_cnt)
mmp_sspa_rx_disable(sspa);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int mmp_sspa_probe(struct snd_soc_dai *dai)
{
struct sspa_priv *priv = dev_get_drvdata(dai->dev);
snd_soc_dai_set_drvdata(dai, priv);
return 0;
}
#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
.startup = mmp_sspa_startup,
.shutdown = mmp_sspa_shutdown,
.trigger = mmp_sspa_trigger,
.hw_params = mmp_sspa_hw_params,
.set_sysclk = mmp_sspa_set_dai_sysclk,
.set_pll = mmp_sspa_set_dai_pll,
.set_fmt = mmp_sspa_set_dai_fmt,
};
static struct snd_soc_dai_driver mmp_sspa_dai = {
.probe = mmp_sspa_probe,
.playback = {
.channels_min = 1,
.channels_max = 128,
.rates = MMP_SSPA_RATES,
.formats = MMP_SSPA_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = MMP_SSPA_RATES,
.formats = MMP_SSPA_FORMATS,
},
.ops = &mmp_sspa_dai_ops,
};
static const struct snd_soc_component_driver mmp_sspa_component = {
.name = "mmp-sspa",
};
static int asoc_mmp_sspa_probe(struct platform_device *pdev)
{
struct sspa_priv *priv;
struct resource *res;
priv = devm_kzalloc(&pdev->dev,
sizeof(struct sspa_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->sspa = devm_kzalloc(&pdev->dev,
sizeof(struct ssp_device), GFP_KERNEL);
if (priv->sspa == NULL)
return -ENOMEM;
priv->dma_params = devm_kzalloc(&pdev->dev,
2 * sizeof(struct snd_dmaengine_dai_dma_data),
GFP_KERNEL);
if (priv->dma_params == NULL)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->sspa->mmio_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->sspa->mmio_base))
return PTR_ERR(priv->sspa->mmio_base);
priv->sspa->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->sspa->clk))
return PTR_ERR(priv->sspa->clk);
priv->audio_clk = clk_get(NULL, "mmp-audio");
if (IS_ERR(priv->audio_clk))
return PTR_ERR(priv->audio_clk);
priv->sysclk = clk_get(NULL, "mmp-sysclk");
if (IS_ERR(priv->sysclk)) {
clk_put(priv->audio_clk);
return PTR_ERR(priv->sysclk);
}
clk_enable(priv->audio_clk);
priv->dai_fmt = (unsigned int) -1;
platform_set_drvdata(pdev, priv);
return devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
&mmp_sspa_dai, 1);
}
static int asoc_mmp_sspa_remove(struct platform_device *pdev)
{
struct sspa_priv *priv = platform_get_drvdata(pdev);
clk_disable(priv->audio_clk);
clk_put(priv->audio_clk);
clk_put(priv->sysclk);
return 0;
}
static struct platform_driver asoc_mmp_sspa_driver = {
.driver = {
.name = "mmp-sspa-dai",
},
.probe = asoc_mmp_sspa_probe,
.remove = asoc_mmp_sspa_remove,
};
module_platform_driver(asoc_mmp_sspa_driver);
MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP SSPA SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-sspa-dai");
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