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linux-sg2042/sound/soc/s3c24xx/s3c2412-i2s.c

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/* sound/soc/s3c24xx/s3c2412-i2s.c
*
* ALSA Soc Audio Layer - S3C2412 I2S driver
*
* Copyright (c) 2006 Wolfson Microelectronics PLC.
* Graeme Gregory graeme.gregory@wolfsonmicro.com
* linux@wolfsonmicro.com
*
* Copyright (c) 2007, 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/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/kernel.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/hardware.h>
#include <linux/io.h>
#include <asm/dma.h>
#include <asm/plat-s3c24xx/regs-s3c2412-iis.h>
#include <asm/arch/regs-gpio.h>
#include <asm/arch/audio.h>
#include <asm/arch/dma.h>
#include "s3c24xx-pcm.h"
#include "s3c2412-i2s.h"
#define S3C2412_I2S_DEBUG 0
#define S3C2412_I2S_DEBUG_CON 0
#if S3C2412_I2S_DEBUG
#define DBG(x...) printk(KERN_INFO x)
#else
#define DBG(x...) do { } while (0)
#endif
static struct s3c2410_dma_client s3c2412_dma_client_out = {
.name = "I2S PCM Stereo out"
};
static struct s3c2410_dma_client s3c2412_dma_client_in = {
.name = "I2S PCM Stereo in"
};
static struct s3c24xx_pcm_dma_params s3c2412_i2s_pcm_stereo_out = {
.client = &s3c2412_dma_client_out,
.channel = DMACH_I2S_OUT,
.dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
.dma_size = 4,
};
static struct s3c24xx_pcm_dma_params s3c2412_i2s_pcm_stereo_in = {
.client = &s3c2412_dma_client_in,
.channel = DMACH_I2S_IN,
.dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
.dma_size = 4,
};
struct s3c2412_i2s_info {
struct device *dev;
void __iomem *regs;
struct clk *iis_clk;
struct clk *iis_pclk;
struct clk *iis_cclk;
u32 suspend_iismod;
u32 suspend_iiscon;
u32 suspend_iispsr;
};
static struct s3c2412_i2s_info s3c2412_i2s;
#define bit_set(v, b) (((v) & (b)) ? 1 : 0)
#if S3C2412_I2S_DEBUG_CON
static void dbg_showcon(const char *fn, u32 con)
{
printk(KERN_DEBUG "%s: LRI=%d, TXFEMPT=%d, RXFEMPT=%d, TXFFULL=%d, RXFFULL=%d\n", fn,
bit_set(con, S3C2412_IISCON_LRINDEX),
bit_set(con, S3C2412_IISCON_TXFIFO_EMPTY),
bit_set(con, S3C2412_IISCON_RXFIFO_EMPTY),
bit_set(con, S3C2412_IISCON_TXFIFO_FULL),
bit_set(con, S3C2412_IISCON_RXFIFO_FULL));
printk(KERN_DEBUG "%s: PAUSE: TXDMA=%d, RXDMA=%d, TXCH=%d, RXCH=%d\n",
fn,
bit_set(con, S3C2412_IISCON_TXDMA_PAUSE),
bit_set(con, S3C2412_IISCON_RXDMA_PAUSE),
bit_set(con, S3C2412_IISCON_TXCH_PAUSE),
bit_set(con, S3C2412_IISCON_RXCH_PAUSE));
printk(KERN_DEBUG "%s: ACTIVE: TXDMA=%d, RXDMA=%d, IIS=%d\n", fn,
bit_set(con, S3C2412_IISCON_TXDMA_ACTIVE),
bit_set(con, S3C2412_IISCON_RXDMA_ACTIVE),
bit_set(con, S3C2412_IISCON_IIS_ACTIVE));
}
#else
static inline void dbg_showcon(const char *fn, u32 con)
{
}
#endif
/* Turn on or off the transmission path. */
static void s3c2412_snd_txctrl(int on)
{
struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
void __iomem *regs = i2s->regs;
u32 fic, con, mod;
DBG("%s(%d)\n", __func__, on);
fic = readl(regs + S3C2412_IISFIC);
con = readl(regs + S3C2412_IISCON);
mod = readl(regs + S3C2412_IISMOD);
DBG("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
if (on) {
con |= S3C2412_IISCON_TXDMA_ACTIVE | S3C2412_IISCON_IIS_ACTIVE;
con &= ~S3C2412_IISCON_TXDMA_PAUSE;
con &= ~S3C2412_IISCON_TXCH_PAUSE;
switch (mod & S3C2412_IISMOD_MODE_MASK) {
case S3C2412_IISMOD_MODE_TXONLY:
case S3C2412_IISMOD_MODE_TXRX:
/* do nothing, we are in the right mode */
break;
case S3C2412_IISMOD_MODE_RXONLY:
mod &= ~S3C2412_IISMOD_MODE_MASK;
mod |= S3C2412_IISMOD_MODE_TXRX;
break;
default:
dev_err(i2s->dev, "TXEN: Invalid MODE in IISMOD\n");
}
writel(con, regs + S3C2412_IISCON);
writel(mod, regs + S3C2412_IISMOD);
} else {
/* Note, we do not have any indication that the FIFO problems
* tha the S3C2410/2440 had apply here, so we should be able
* to disable the DMA and TX without resetting the FIFOS.
*/
con |= S3C2412_IISCON_TXDMA_PAUSE;
con |= S3C2412_IISCON_TXCH_PAUSE;
con &= ~S3C2412_IISCON_TXDMA_ACTIVE;
switch (mod & S3C2412_IISMOD_MODE_MASK) {
case S3C2412_IISMOD_MODE_TXRX:
mod &= ~S3C2412_IISMOD_MODE_MASK;
mod |= S3C2412_IISMOD_MODE_RXONLY;
break;
case S3C2412_IISMOD_MODE_TXONLY:
mod &= ~S3C2412_IISMOD_MODE_MASK;
con &= ~S3C2412_IISCON_IIS_ACTIVE;
break;
default:
dev_err(i2s->dev, "TXDIS: Invalid MODE in IISMOD\n");
}
writel(mod, regs + S3C2412_IISMOD);
writel(con, regs + S3C2412_IISCON);
}
fic = readl(regs + S3C2412_IISFIC);
dbg_showcon(__func__, con);
DBG("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
}
static void s3c2412_snd_rxctrl(int on)
{
struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
void __iomem *regs = i2s->regs;
u32 fic, con, mod;
DBG("%s(%d)\n", __func__, on);
fic = readl(regs + S3C2412_IISFIC);
con = readl(regs + S3C2412_IISCON);
mod = readl(regs + S3C2412_IISMOD);
DBG("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
if (on) {
con |= S3C2412_IISCON_RXDMA_ACTIVE | S3C2412_IISCON_IIS_ACTIVE;
con &= ~S3C2412_IISCON_RXDMA_PAUSE;
con &= ~S3C2412_IISCON_RXCH_PAUSE;
switch (mod & S3C2412_IISMOD_MODE_MASK) {
case S3C2412_IISMOD_MODE_TXRX:
case S3C2412_IISMOD_MODE_RXONLY:
/* do nothing, we are in the right mode */
break;
case S3C2412_IISMOD_MODE_TXONLY:
mod &= ~S3C2412_IISMOD_MODE_MASK;
mod |= S3C2412_IISMOD_MODE_TXRX;
break;
default:
dev_err(i2s->dev, "RXEN: Invalid MODE in IISMOD\n");
}
writel(mod, regs + S3C2412_IISMOD);
writel(con, regs + S3C2412_IISCON);
} else {
/* See txctrl notes on FIFOs. */
con &= ~S3C2412_IISCON_RXDMA_ACTIVE;
con |= S3C2412_IISCON_RXDMA_PAUSE;
con |= S3C2412_IISCON_RXCH_PAUSE;
switch (mod & S3C2412_IISMOD_MODE_MASK) {
case S3C2412_IISMOD_MODE_RXONLY:
con &= ~S3C2412_IISCON_IIS_ACTIVE;
mod &= ~S3C2412_IISMOD_MODE_MASK;
break;
case S3C2412_IISMOD_MODE_TXRX:
mod &= ~S3C2412_IISMOD_MODE_MASK;
mod |= S3C2412_IISMOD_MODE_TXONLY;
break;
default:
dev_err(i2s->dev, "RXEN: Invalid MODE in IISMOD\n");
}
writel(con, regs + S3C2412_IISCON);
writel(mod, regs + S3C2412_IISMOD);
}
fic = readl(regs + S3C2412_IISFIC);
DBG("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
}
/*
* 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 s3c2412_snd_lrsync(void)
{
u32 iiscon;
unsigned long timeout = jiffies + msecs_to_jiffies(5);
DBG("Entered %s\n", __func__);
while (1) {
iiscon = readl(s3c2412_i2s.regs + S3C2412_IISCON);
if (iiscon & S3C2412_IISCON_LRINDEX)
break;
if (timeout < jiffies) {
printk(KERN_ERR "%s: timeout\n", __func__);
return -ETIMEDOUT;
}
}
return 0;
}
/*
* Check whether CPU is the master or slave
*/
static inline int s3c2412_snd_is_clkmaster(void)
{
u32 iismod = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("Entered %s\n", __func__);
iismod &= S3C2412_IISMOD_MASTER_MASK;
return !(iismod == S3C2412_IISMOD_SLAVE);
}
/*
* Set S3C2412 I2S DAI format
*/
static int s3c2412_i2s_set_fmt(struct snd_soc_cpu_dai *cpu_dai,
unsigned int fmt)
{
u32 iismod;
DBG("Entered %s\n", __func__);
iismod = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("hw_params r: IISMOD: %x \n", iismod);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iismod &= ~S3C2412_IISMOD_MASTER_MASK;
iismod |= S3C2412_IISMOD_SLAVE;
break;
case SND_SOC_DAIFMT_CBS_CFS:
iismod &= ~S3C2412_IISMOD_MASTER_MASK;
iismod |= S3C2412_IISMOD_MASTER_INTERNAL;
break;
default:
DBG("unknwon master/slave format\n");
return -EINVAL;
}
iismod &= ~S3C2412_IISMOD_SDF_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
iismod |= S3C2412_IISMOD_SDF_MSB;
break;
case SND_SOC_DAIFMT_LEFT_J:
iismod |= S3C2412_IISMOD_SDF_LSB;
break;
case SND_SOC_DAIFMT_I2S:
iismod |= S3C2412_IISMOD_SDF_IIS;
break;
default:
DBG("Unknown data format\n");
return -EINVAL;
}
writel(iismod, s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("hw_params w: IISMOD: %x \n", iismod);
return 0;
}
static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
u32 iismod;
DBG("Entered %s\n", __func__);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rtd->dai->cpu_dai->dma_data = &s3c2412_i2s_pcm_stereo_out;
else
rtd->dai->cpu_dai->dma_data = &s3c2412_i2s_pcm_stereo_in;
/* Working copies of register */
iismod = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("%s: r: IISMOD: %x\n", __func__, iismod);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
iismod |= S3C2412_IISMOD_8BIT;
break;
case SNDRV_PCM_FORMAT_S16_LE:
iismod &= ~S3C2412_IISMOD_8BIT;
break;
}
writel(iismod, s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("%s: w: IISMOD: %x\n", __func__, iismod);
return 0;
}
static int s3c2412_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
{
int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
unsigned long irqs;
int ret = 0;
DBG("Entered %s\n", __func__);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* On start, ensure that the FIFOs are cleared and reset. */
writel(capture ? S3C2412_IISFIC_RXFLUSH : S3C2412_IISFIC_TXFLUSH,
s3c2412_i2s.regs + S3C2412_IISFIC);
/* clear again, just in case */
writel(0x0, s3c2412_i2s.regs + S3C2412_IISFIC);
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (!s3c2412_snd_is_clkmaster()) {
ret = s3c2412_snd_lrsync();
if (ret)
goto exit_err;
}
local_irq_save(irqs);
if (capture)
s3c2412_snd_rxctrl(1);
else
s3c2412_snd_txctrl(1);
local_irq_restore(irqs);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
local_irq_save(irqs);
if (capture)
s3c2412_snd_rxctrl(0);
else
s3c2412_snd_txctrl(0);
local_irq_restore(irqs);
break;
default:
ret = -EINVAL;
break;
}
exit_err:
return ret;
}
/* default table of all avaialable root fs divisors */
static unsigned int s3c2412_iis_fs[] = { 256, 512, 384, 768, 0 };
int s3c2412_iis_calc_rate(struct s3c2412_rate_calc *info,
unsigned int *fstab,
unsigned int rate, struct clk *clk)
{
unsigned long clkrate = clk_get_rate(clk);
unsigned int div;
unsigned int fsclk;
unsigned int actual;
unsigned int fs;
unsigned int fsdiv;
signed int deviation = 0;
unsigned int best_fs = 0;
unsigned int best_div = 0;
unsigned int best_rate = 0;
unsigned int best_deviation = INT_MAX;
if (fstab == NULL)
fstab = s3c2412_iis_fs;
for (fs = 0;; fs++) {
fsdiv = s3c2412_iis_fs[fs];
if (fsdiv == 0)
break;
fsclk = clkrate / fsdiv;
div = fsclk / rate;
if ((fsclk % rate) > (rate / 2))
div++;
if (div <= 1)
continue;
actual = clkrate / (fsdiv * div);
deviation = actual - rate;
printk(KERN_DEBUG "%dfs: div %d => result %d, deviation %d\n",
fsdiv, div, actual, deviation);
deviation = abs(deviation);
if (deviation < best_deviation) {
best_fs = fsdiv;
best_div = div;
best_rate = actual;
best_deviation = deviation;
}
if (deviation == 0)
break;
}
printk(KERN_DEBUG "best: fs=%d, div=%d, rate=%d\n",
best_fs, best_div, best_rate);
info->fs_div = best_fs;
info->clk_div = best_div;
return 0;
}
EXPORT_SYMBOL_GPL(s3c2412_iis_calc_rate);
/*
* Set S3C2412 Clock source
*/
static int s3c2412_i2s_set_sysclk(struct snd_soc_cpu_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
u32 iismod = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
DBG("%s(%p, %d, %u, %d)\n", __func__, cpu_dai, clk_id,
freq, dir);
switch (clk_id) {
case S3C2412_CLKSRC_PCLK:
iismod &= ~S3C2412_IISMOD_MASTER_MASK;
iismod |= S3C2412_IISMOD_MASTER_INTERNAL;
break;
case S3C2412_CLKSRC_I2SCLK:
iismod &= ~S3C2412_IISMOD_MASTER_MASK;
iismod |= S3C2412_IISMOD_MASTER_EXTERNAL;
break;
default:
return -EINVAL;
}
writel(iismod, s3c2412_i2s.regs + S3C2412_IISMOD);
return 0;
}
/*
* Set S3C2412 Clock dividers
*/
static int s3c2412_i2s_set_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
int div_id, int div)
{
struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
u32 reg;
DBG("%s(%p, %d, %d)\n", __func__, cpu_dai, div_id, div);
switch (div_id) {
case S3C2412_DIV_BCLK:
reg = readl(i2s->regs + S3C2412_IISMOD);
reg &= ~S3C2412_IISMOD_BCLK_MASK;
writel(reg | div, i2s->regs + S3C2412_IISMOD);
DBG("%s: MOD=%08x\n", __func__, readl(i2s->regs + S3C2412_IISMOD));
break;
case S3C2412_DIV_RCLK:
if (div > 3) {
/* convert value to bit field */
switch (div) {
case 256:
div = S3C2412_IISMOD_RCLK_256FS;
break;
case 384:
div = S3C2412_IISMOD_RCLK_384FS;
break;
case 512:
div = S3C2412_IISMOD_RCLK_512FS;
break;
case 768:
div = S3C2412_IISMOD_RCLK_768FS;
break;
default:
return -EINVAL;
}
}
reg = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
reg &= ~S3C2412_IISMOD_RCLK_MASK;
writel(reg | div, i2s->regs + S3C2412_IISMOD);
DBG("%s: MOD=%08x\n", __func__, readl(i2s->regs + S3C2412_IISMOD));
break;
case S3C2412_DIV_PRESCALER:
if (div >= 0) {
writel((div << 8) | S3C2412_IISPSR_PSREN,
i2s->regs + S3C2412_IISPSR);
} else {
writel(0x0, i2s->regs + S3C2412_IISPSR);
}
DBG("%s: PSR=%08x\n", __func__, readl(i2s->regs + S3C2412_IISPSR));
break;
default:
return -EINVAL;
}
return 0;
}
struct clk *s3c2412_get_iisclk(void)
{
return s3c2412_i2s.iis_clk;
}
EXPORT_SYMBOL_GPL(s3c2412_get_iisclk);
static int s3c2412_i2s_probe(struct platform_device *pdev)
{
DBG("Entered %s\n", __func__);
s3c2412_i2s.dev = &pdev->dev;
s3c2412_i2s.regs = ioremap(S3C2410_PA_IIS, 0x100);
if (s3c2412_i2s.regs == NULL)
return -ENXIO;
s3c2412_i2s.iis_pclk = clk_get(&pdev->dev, "iis");
if (s3c2412_i2s.iis_pclk == NULL) {
DBG("failed to get iis_clock\n");
iounmap(s3c2412_i2s.regs);
return -ENODEV;
}
s3c2412_i2s.iis_cclk = clk_get(&pdev->dev, "i2sclk");
if (s3c2412_i2s.iis_cclk == NULL) {
DBG("failed to get i2sclk clock\n");
iounmap(s3c2412_i2s.regs);
return -ENODEV;
}
clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
clk_enable(s3c2412_i2s.iis_pclk);
clk_enable(s3c2412_i2s.iis_cclk);
s3c2412_i2s.iis_clk = s3c2412_i2s.iis_pclk;
/* Configure the I2S pins in correct mode */
s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
s3c2412_snd_txctrl(0);
s3c2412_snd_rxctrl(0);
return 0;
}
#ifdef CONFIG_PM
static int s3c2412_i2s_suspend(struct platform_device *dev,
struct snd_soc_cpu_dai *dai)
{
struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
u32 iismod;
if (dai->active) {
i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
/* some basic suspend checks */
iismod = readl(i2s->regs + S3C2412_IISMOD);
if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
dev_warn(&dev->dev, "%s: RXDMA active?\n", __func__);
if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
dev_warn(&dev->dev, "%s: TXDMA active?\n", __func__);
if (iismod & S3C2412_IISCON_IIS_ACTIVE)
dev_warn(&dev->dev, "%s: IIS active\n", __func__);
}
return 0;
}
static int s3c2412_i2s_resume(struct platform_device *pdev,
struct snd_soc_cpu_dai *dai)
{
struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
dev_info(&pdev->dev, "dai_active %d, IISMOD %08x, IISCON %08x\n",
dai->active, i2s->suspend_iismod, i2s->suspend_iiscon);
if (dai->active) {
writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
i2s->regs + S3C2412_IISFIC);
ndelay(250);
writel(0x0, i2s->regs + S3C2412_IISFIC);
}
return 0;
}
#else
#define s3c2412_i2s_suspend NULL
#define s3c2412_i2s_resume NULL
#endif /* CONFIG_PM */
#define S3C2412_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)
struct snd_soc_cpu_dai s3c2412_i2s_dai = {
.name = "s3c2412-i2s",
.id = 0,
.type = SND_SOC_DAI_I2S,
.probe = s3c2412_i2s_probe,
.suspend = s3c2412_i2s_suspend,
.resume = s3c2412_i2s_resume,
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C2412_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = S3C2412_I2S_RATES,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = {
.trigger = s3c2412_i2s_trigger,
.hw_params = s3c2412_i2s_hw_params,
},
.dai_ops = {
.set_fmt = s3c2412_i2s_set_fmt,
.set_clkdiv = s3c2412_i2s_set_clkdiv,
.set_sysclk = s3c2412_i2s_set_sysclk,
},
};
EXPORT_SYMBOL_GPL(s3c2412_i2s_dai);
/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
MODULE_LICENSE("GPL");
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