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linux/sound/soc/samsung/s3c24xx-i2s.c
Sachin Kamat 71e5222cbe ASoC: samsung: Fix build on multiplatform 
PCM and S/PDIF drivers referenced mach headers for a trivial
data structure. This caused build errors on multiplatform builds
as machine headers are not accessible from driver files. Move the data
structure definition to the driver header and remove the dependency.
While at it rename the structure to avoid multiple definition errors
as the same structure is also used by the platform code.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-04-08 12:51:57 +01:00

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/*
* s3c24xx-i2s.c -- ALSA Soc Audio Layer
*
* (c) 2006 Wolfson Microelectronics PLC.
* Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
*
* Copyright 2004-2005 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* 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.
*/
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <mach/dma.h>
#include <mach/gpio-samsung.h>
#include <plat/gpio-cfg.h>
#include "regs-iis.h"
#include "dma.h"
#include "s3c24xx-i2s.h"
static struct s3c_dma_client s3c24xx_dma_client_out = {
.name = "I2S PCM Stereo out"
};
static struct s3c_dma_client s3c24xx_dma_client_in = {
.name = "I2S PCM Stereo in"
};
static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_out = {
.client = &s3c24xx_dma_client_out,
.channel = DMACH_I2S_OUT,
.dma_addr = S3C2410_PA_IIS + S3C2410_IISFIFO,
.dma_size = 2,
};
static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_in = {
.client = &s3c24xx_dma_client_in,
.channel = DMACH_I2S_IN,
.dma_addr = S3C2410_PA_IIS + S3C2410_IISFIFO,
.dma_size = 2,
};
struct s3c24xx_i2s_info {
void __iomem *regs;
struct clk *iis_clk;
u32 iiscon;
u32 iismod;
u32 iisfcon;
u32 iispsr;
};
static struct s3c24xx_i2s_info s3c24xx_i2s;
static void s3c24xx_snd_txctrl(int on)
{
u32 iisfcon;
u32 iiscon;
u32 iismod;
pr_debug("Entered %s\n", __func__);
iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("r: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
if (on) {
iisfcon |= S3C2410_IISFCON_TXDMA | S3C2410_IISFCON_TXENABLE;
iiscon |= S3C2410_IISCON_TXDMAEN | S3C2410_IISCON_IISEN;
iiscon &= ~S3C2410_IISCON_TXIDLE;
iismod |= S3C2410_IISMOD_TXMODE;
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
} else {
/* note, we have to disable the FIFOs otherwise bad things
* seem to happen when the DMA stops. According to the
* Samsung supplied kernel, this should allow the DMA
* engine and FIFOs to reset. If this isn't allowed, the
* DMA engine will simply freeze randomly.
*/
iisfcon &= ~S3C2410_IISFCON_TXENABLE;
iisfcon &= ~S3C2410_IISFCON_TXDMA;
iiscon |= S3C2410_IISCON_TXIDLE;
iiscon &= ~S3C2410_IISCON_TXDMAEN;
iismod &= ~S3C2410_IISMOD_TXMODE;
writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
}
pr_debug("w: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
}
static void s3c24xx_snd_rxctrl(int on)
{
u32 iisfcon;
u32 iiscon;
u32 iismod;
pr_debug("Entered %s\n", __func__);
iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("r: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
if (on) {
iisfcon |= S3C2410_IISFCON_RXDMA | S3C2410_IISFCON_RXENABLE;
iiscon |= S3C2410_IISCON_RXDMAEN | S3C2410_IISCON_IISEN;
iiscon &= ~S3C2410_IISCON_RXIDLE;
iismod |= S3C2410_IISMOD_RXMODE;
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
} else {
/* note, we have to disable the FIFOs otherwise bad things
* seem to happen when the DMA stops. According to the
* Samsung supplied kernel, this should allow the DMA
* engine and FIFOs to reset. If this isn't allowed, the
* DMA engine will simply freeze randomly.
*/
iisfcon &= ~S3C2410_IISFCON_RXENABLE;
iisfcon &= ~S3C2410_IISFCON_RXDMA;
iiscon |= S3C2410_IISCON_RXIDLE;
iiscon &= ~S3C2410_IISCON_RXDMAEN;
iismod &= ~S3C2410_IISMOD_RXMODE;
writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
}
pr_debug("w: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
}
/*
* Wait for the LR signal to allow synchronisation to the L/R clock
* from the codec. May only be needed for slave mode.
*/
static int s3c24xx_snd_lrsync(void)
{
u32 iiscon;
int timeout = 50; /* 5ms */
pr_debug("Entered %s\n", __func__);
while (1) {
iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
if (iiscon & S3C2410_IISCON_LRINDEX)
break;
if (!timeout--)
return -ETIMEDOUT;
udelay(100);
}
return 0;
}
/*
* Check whether CPU is the master or slave
*/
static inline int s3c24xx_snd_is_clkmaster(void)
{
pr_debug("Entered %s\n", __func__);
return (readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & S3C2410_IISMOD_SLAVE) ? 0:1;
}
/*
* Set S3C24xx I2S DAI format
*/
static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
u32 iismod;
pr_debug("Entered %s\n", __func__);
iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("hw_params r: IISMOD: %x \n", iismod);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iismod |= S3C2410_IISMOD_SLAVE;
break;
case SND_SOC_DAIFMT_CBS_CFS:
iismod &= ~S3C2410_IISMOD_SLAVE;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_LEFT_J:
iismod |= S3C2410_IISMOD_MSB;
break;
case SND_SOC_DAIFMT_I2S:
iismod &= ~S3C2410_IISMOD_MSB;
break;
default:
return -EINVAL;
}
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("hw_params w: IISMOD: %x \n", iismod);
return 0;
}
static int s3c24xx_i2s_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 s3c_dma_params *dma_data;
u32 iismod;
pr_debug("Entered %s\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dma_data = &s3c24xx_i2s_pcm_stereo_out;
else
dma_data = &s3c24xx_i2s_pcm_stereo_in;
snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data);
/* Working copies of register */
iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("hw_params r: IISMOD: %x\n", iismod);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
iismod &= ~S3C2410_IISMOD_16BIT;
dma_data->dma_size = 1;
break;
case SNDRV_PCM_FORMAT_S16_LE:
iismod |= S3C2410_IISMOD_16BIT;
dma_data->dma_size = 2;
break;
default:
return -EINVAL;
}
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("hw_params w: IISMOD: %x\n", iismod);
return 0;
}
static int s3c24xx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
int ret = 0;
struct s3c_dma_params *dma_data =
snd_soc_dai_get_dma_data(dai, substream);
pr_debug("Entered %s\n", __func__);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (!s3c24xx_snd_is_clkmaster()) {
ret = s3c24xx_snd_lrsync();
if (ret)
goto exit_err;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
s3c24xx_snd_rxctrl(1);
else
s3c24xx_snd_txctrl(1);
s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
s3c24xx_snd_rxctrl(0);
else
s3c24xx_snd_txctrl(0);
break;
default:
ret = -EINVAL;
break;
}
exit_err:
return ret;
}
/*
* Set S3C24xx Clock source
*/
static int s3c24xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
u32 iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
pr_debug("Entered %s\n", __func__);
iismod &= ~S3C2440_IISMOD_MPLL;
switch (clk_id) {
case S3C24XX_CLKSRC_PCLK:
break;
case S3C24XX_CLKSRC_MPLL:
iismod |= S3C2440_IISMOD_MPLL;
break;
default:
return -EINVAL;
}
writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
return 0;
}
/*
* Set S3C24xx Clock dividers
*/
static int s3c24xx_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
u32 reg;
pr_debug("Entered %s\n", __func__);
switch (div_id) {
case S3C24XX_DIV_BCLK:
reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~S3C2410_IISMOD_FS_MASK;
writel(reg | div, s3c24xx_i2s.regs + S3C2410_IISMOD);
break;
case S3C24XX_DIV_MCLK:
reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~(S3C2410_IISMOD_384FS);
writel(reg | div, s3c24xx_i2s.regs + S3C2410_IISMOD);
break;
case S3C24XX_DIV_PRESCALER:
writel(div, s3c24xx_i2s.regs + S3C2410_IISPSR);
reg = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
writel(reg | S3C2410_IISCON_PSCEN, s3c24xx_i2s.regs + S3C2410_IISCON);
break;
default:
return -EINVAL;
}
return 0;
}
/*
* To avoid duplicating clock code, allow machine driver to
* get the clockrate from here.
*/
u32 s3c24xx_i2s_get_clockrate(void)
{
return clk_get_rate(s3c24xx_i2s.iis_clk);
}
EXPORT_SYMBOL_GPL(s3c24xx_i2s_get_clockrate);
static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
{
pr_debug("Entered %s\n", __func__);
s3c24xx_i2s.regs = ioremap(S3C2410_PA_IIS, 0x100);
if (s3c24xx_i2s.regs == NULL)
return -ENXIO;
s3c24xx_i2s.iis_clk = clk_get(dai->dev, "iis");
if (IS_ERR(s3c24xx_i2s.iis_clk)) {
pr_err("failed to get iis_clock\n");
iounmap(s3c24xx_i2s.regs);
return PTR_ERR(s3c24xx_i2s.iis_clk);
}
clk_enable(s3c24xx_i2s.iis_clk);
/* Configure the I2S pins (GPE0...GPE4) in correct mode */
s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
S3C_GPIO_PULL_NONE);
writel(S3C2410_IISCON_IISEN, s3c24xx_i2s.regs + S3C2410_IISCON);
s3c24xx_snd_txctrl(0);
s3c24xx_snd_rxctrl(0);
return 0;
}
#ifdef CONFIG_PM
static int s3c24xx_i2s_suspend(struct snd_soc_dai *cpu_dai)
{
pr_debug("Entered %s\n", __func__);
s3c24xx_i2s.iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
s3c24xx_i2s.iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
s3c24xx_i2s.iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
s3c24xx_i2s.iispsr = readl(s3c24xx_i2s.regs + S3C2410_IISPSR);
clk_disable(s3c24xx_i2s.iis_clk);
return 0;
}
static int s3c24xx_i2s_resume(struct snd_soc_dai *cpu_dai)
{
pr_debug("Entered %s\n", __func__);
clk_enable(s3c24xx_i2s.iis_clk);
writel(s3c24xx_i2s.iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
writel(s3c24xx_i2s.iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
writel(s3c24xx_i2s.iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
writel(s3c24xx_i2s.iispsr, s3c24xx_i2s.regs + S3C2410_IISPSR);
return 0;
}
#else
#define s3c24xx_i2s_suspend NULL
#define s3c24xx_i2s_resume NULL
#endif
#define S3C24XX_I2S_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)
static const struct snd_soc_dai_ops s3c24xx_i2s_dai_ops = {
.trigger = s3c24xx_i2s_trigger,
.hw_params = s3c24xx_i2s_hw_params,
.set_fmt = s3c24xx_i2s_set_fmt,
.set_clkdiv = s3c24xx_i2s_set_clkdiv,
.set_sysclk = s3c24xx_i2s_set_sysclk,
};
static struct snd_soc_dai_driver s3c24xx_i2s_dai = {
.probe = s3c24xx_i2s_probe,
.suspend = s3c24xx_i2s_suspend,
.resume = s3c24xx_i2s_resume,
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C24XX_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C24XX_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,},
.ops = &s3c24xx_i2s_dai_ops,
};
static const struct snd_soc_component_driver s3c24xx_i2s_component = {
.name = "s3c24xx-i2s",
};
static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
{
int ret = 0;
ret = snd_soc_register_component(&pdev->dev, &s3c24xx_i2s_component,
&s3c24xx_i2s_dai, 1);
if (ret) {
pr_err("failed to register the dai\n");
return ret;
}
ret = samsung_asoc_dma_platform_register(&pdev->dev);
if (ret) {
pr_err("failed to register the dma: %d\n", ret);
goto err;
}
return 0;
err:
snd_soc_unregister_component(&pdev->dev);
return ret;
}
static int s3c24xx_iis_dev_remove(struct platform_device *pdev)
{
samsung_asoc_dma_platform_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
return 0;
}
static struct platform_driver s3c24xx_iis_driver = {
.probe = s3c24xx_iis_dev_probe,
.remove = s3c24xx_iis_dev_remove,
.driver = {
.name = "s3c24xx-iis",
.owner = THIS_MODULE,
},
};
module_platform_driver(s3c24xx_iis_driver);
/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("s3c24xx I2S SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c24xx-iis");
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