503 строки
13 KiB
C
503 строки
13 KiB
C
/*
|
|
* kirkwood-i2s.c
|
|
*
|
|
* (c) 2010 Arnaud Patard <apatard@mandriva.com>
|
|
* (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
|
|
*
|
|
* 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/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mbus.h>
|
|
#include <linux/delay.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include <plat/audio.h>
|
|
#include "kirkwood.h"
|
|
|
|
#define DRV_NAME "kirkwood-i2s"
|
|
|
|
#define KIRKWOOD_I2S_RATES \
|
|
(SNDRV_PCM_RATE_44100 | \
|
|
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
|
|
#define KIRKWOOD_I2S_FORMATS \
|
|
(SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
SNDRV_PCM_FMTBIT_S32_LE)
|
|
|
|
static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
|
|
unsigned int fmt)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
|
|
unsigned long mask;
|
|
unsigned long value;
|
|
|
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
|
mask = KIRKWOOD_I2S_CTL_RJ;
|
|
break;
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
|
mask = KIRKWOOD_I2S_CTL_LJ;
|
|
break;
|
|
case SND_SOC_DAIFMT_I2S:
|
|
mask = KIRKWOOD_I2S_CTL_I2S;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Set same format for playback and record
|
|
* This avoids some troubles.
|
|
*/
|
|
value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
|
|
value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
|
|
value |= mask;
|
|
writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
|
|
|
|
value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
|
|
value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
|
|
value |= mask;
|
|
writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
|
|
{
|
|
unsigned long value;
|
|
|
|
value = KIRKWOOD_DCO_CTL_OFFSET_0;
|
|
switch (rate) {
|
|
default:
|
|
case 44100:
|
|
value |= KIRKWOOD_DCO_CTL_FREQ_11;
|
|
break;
|
|
case 48000:
|
|
value |= KIRKWOOD_DCO_CTL_FREQ_12;
|
|
break;
|
|
case 96000:
|
|
value |= KIRKWOOD_DCO_CTL_FREQ_24;
|
|
break;
|
|
}
|
|
writel(value, io + KIRKWOOD_DCO_CTL);
|
|
|
|
/* wait for dco locked */
|
|
do {
|
|
cpu_relax();
|
|
value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
|
|
value &= KIRKWOOD_DCO_SPCR_STATUS;
|
|
} while (value == 0);
|
|
}
|
|
|
|
static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
|
|
snd_soc_dai_set_dma_data(dai, substream, priv);
|
|
return 0;
|
|
}
|
|
|
|
static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
unsigned int i2s_reg, reg;
|
|
unsigned long i2s_value, value;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
i2s_reg = KIRKWOOD_I2S_PLAYCTL;
|
|
reg = KIRKWOOD_PLAYCTL;
|
|
} else {
|
|
i2s_reg = KIRKWOOD_I2S_RECCTL;
|
|
reg = KIRKWOOD_RECCTL;
|
|
}
|
|
|
|
/* set dco conf */
|
|
kirkwood_set_dco(priv->io, params_rate(params));
|
|
|
|
i2s_value = readl(priv->io+i2s_reg);
|
|
i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
|
|
|
|
value = readl(priv->io+reg);
|
|
value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
|
|
|
|
/*
|
|
* Size settings in play/rec i2s control regs and play/rec control
|
|
* regs must be the same.
|
|
*/
|
|
switch (params_format(params)) {
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
|
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
|
|
value |= KIRKWOOD_PLAYCTL_SIZE_16_C;
|
|
break;
|
|
/*
|
|
* doesn't work... S20_3LE != kirkwood 20bit format ?
|
|
*
|
|
case SNDRV_PCM_FORMAT_S20_3LE:
|
|
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
|
|
value |= KIRKWOOD_PLAYCTL_SIZE_20;
|
|
break;
|
|
*/
|
|
case SNDRV_PCM_FORMAT_S24_LE:
|
|
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
|
|
value |= KIRKWOOD_PLAYCTL_SIZE_24;
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S32_LE:
|
|
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
|
|
value |= KIRKWOOD_PLAYCTL_SIZE_32;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
|
|
if (params_channels(params) == 1)
|
|
value |= KIRKWOOD_PLAYCTL_MONO_BOTH;
|
|
else
|
|
value |= KIRKWOOD_PLAYCTL_MONO_OFF;
|
|
}
|
|
|
|
writel(i2s_value, priv->io+i2s_reg);
|
|
writel(value, priv->io+reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
|
|
int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
unsigned long value;
|
|
|
|
/*
|
|
* specs says KIRKWOOD_PLAYCTL must be read 2 times before
|
|
* changing it. So read 1 time here and 1 later.
|
|
*/
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
/* stop audio, enable interrupts */
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value |= KIRKWOOD_PLAYCTL_PAUSE;
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
|
|
value = readl(priv->io + KIRKWOOD_INT_MASK);
|
|
value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
|
|
writel(value, priv->io + KIRKWOOD_INT_MASK);
|
|
|
|
/* configure audio & enable i2s playback */
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
|
|
value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE
|
|
| KIRKWOOD_PLAYCTL_SPDIF_EN);
|
|
|
|
if (priv->burst == 32)
|
|
value |= KIRKWOOD_PLAYCTL_BURST_32;
|
|
else
|
|
value |= KIRKWOOD_PLAYCTL_BURST_128;
|
|
value |= KIRKWOOD_PLAYCTL_I2S_EN;
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
/* stop audio, disable interrupts */
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
|
|
value = readl(priv->io + KIRKWOOD_INT_MASK);
|
|
value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
|
|
writel(value, priv->io + KIRKWOOD_INT_MASK);
|
|
|
|
/* disable all playbacks */
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
|
|
int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
unsigned long value;
|
|
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
/* stop audio, enable interrupts */
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value |= KIRKWOOD_RECCTL_PAUSE;
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
|
|
value = readl(priv->io + KIRKWOOD_INT_MASK);
|
|
value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
|
|
writel(value, priv->io + KIRKWOOD_INT_MASK);
|
|
|
|
/* configure audio & enable i2s record */
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value &= ~KIRKWOOD_RECCTL_BURST_MASK;
|
|
value &= ~KIRKWOOD_RECCTL_MONO;
|
|
value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE
|
|
| KIRKWOOD_RECCTL_SPDIF_EN);
|
|
|
|
if (priv->burst == 32)
|
|
value |= KIRKWOOD_RECCTL_BURST_32;
|
|
else
|
|
value |= KIRKWOOD_RECCTL_BURST_128;
|
|
value |= KIRKWOOD_RECCTL_I2S_EN;
|
|
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
/* stop audio, disable interrupts */
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
|
|
value = readl(priv->io + KIRKWOOD_INT_MASK);
|
|
value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
|
|
writel(value, priv->io + KIRKWOOD_INT_MASK);
|
|
|
|
/* disable all records */
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
return kirkwood_i2s_play_trigger(substream, cmd, dai);
|
|
else
|
|
return kirkwood_i2s_rec_trigger(substream, cmd, dai);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
|
|
{
|
|
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
unsigned long value;
|
|
unsigned int reg_data;
|
|
|
|
/* put system in a "safe" state : */
|
|
/* disable audio interrupts */
|
|
writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
|
|
writel(0, priv->io + KIRKWOOD_INT_MASK);
|
|
|
|
reg_data = readl(priv->io + 0x1200);
|
|
reg_data &= (~(0x333FF8));
|
|
reg_data |= 0x111D18;
|
|
writel(reg_data, priv->io + 0x1200);
|
|
|
|
msleep(500);
|
|
|
|
reg_data = readl(priv->io + 0x1200);
|
|
reg_data &= (~(0x333FF8));
|
|
reg_data |= 0x111D18;
|
|
writel(reg_data, priv->io + 0x1200);
|
|
|
|
/* disable playback/record */
|
|
value = readl(priv->io + KIRKWOOD_PLAYCTL);
|
|
value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
|
|
writel(value, priv->io + KIRKWOOD_PLAYCTL);
|
|
|
|
value = readl(priv->io + KIRKWOOD_RECCTL);
|
|
value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
|
|
writel(value, priv->io + KIRKWOOD_RECCTL);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int kirkwood_i2s_remove(struct snd_soc_dai *dai)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
|
|
.startup = kirkwood_i2s_startup,
|
|
.trigger = kirkwood_i2s_trigger,
|
|
.hw_params = kirkwood_i2s_hw_params,
|
|
.set_fmt = kirkwood_i2s_set_fmt,
|
|
};
|
|
|
|
|
|
static struct snd_soc_dai_driver kirkwood_i2s_dai = {
|
|
.probe = kirkwood_i2s_probe,
|
|
.remove = kirkwood_i2s_remove,
|
|
.playback = {
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = KIRKWOOD_I2S_RATES,
|
|
.formats = KIRKWOOD_I2S_FORMATS,},
|
|
.capture = {
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = KIRKWOOD_I2S_RATES,
|
|
.formats = KIRKWOOD_I2S_FORMATS,},
|
|
.ops = &kirkwood_i2s_dai_ops,
|
|
};
|
|
|
|
static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *mem;
|
|
struct kirkwood_asoc_platform_data *data =
|
|
pdev->dev.platform_data;
|
|
struct kirkwood_dma_data *priv;
|
|
int err;
|
|
|
|
priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&pdev->dev, "allocation failed\n");
|
|
err = -ENOMEM;
|
|
goto error;
|
|
}
|
|
dev_set_drvdata(&pdev->dev, priv);
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem) {
|
|
dev_err(&pdev->dev, "platform_get_resource failed\n");
|
|
err = -ENXIO;
|
|
goto err_alloc;
|
|
}
|
|
|
|
priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
|
|
if (!priv->mem) {
|
|
dev_err(&pdev->dev, "request_mem_region failed\n");
|
|
err = -EBUSY;
|
|
goto error;
|
|
}
|
|
|
|
priv->io = ioremap(priv->mem->start, SZ_16K);
|
|
if (!priv->io) {
|
|
dev_err(&pdev->dev, "ioremap failed\n");
|
|
err = -ENOMEM;
|
|
goto err_iomem;
|
|
}
|
|
|
|
priv->irq = platform_get_irq(pdev, 0);
|
|
if (priv->irq <= 0) {
|
|
dev_err(&pdev->dev, "platform_get_irq failed\n");
|
|
err = -ENXIO;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
if (!data || !data->dram) {
|
|
dev_err(&pdev->dev, "no platform data ?!\n");
|
|
err = -EINVAL;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
priv->dram = data->dram;
|
|
priv->burst = data->burst;
|
|
|
|
return snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai);
|
|
|
|
err_ioremap:
|
|
iounmap(priv->io);
|
|
err_iomem:
|
|
release_mem_region(priv->mem->start, SZ_16K);
|
|
err_alloc:
|
|
kfree(priv);
|
|
error:
|
|
return err;
|
|
}
|
|
|
|
static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
|
|
{
|
|
struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
|
|
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
iounmap(priv->io);
|
|
release_mem_region(priv->mem->start, SZ_16K);
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver kirkwood_i2s_driver = {
|
|
.probe = kirkwood_i2s_dev_probe,
|
|
.remove = kirkwood_i2s_dev_remove,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init kirkwood_i2s_init(void)
|
|
{
|
|
return platform_driver_register(&kirkwood_i2s_driver);
|
|
}
|
|
module_init(kirkwood_i2s_init);
|
|
|
|
static void __exit kirkwood_i2s_exit(void)
|
|
{
|
|
platform_driver_unregister(&kirkwood_i2s_driver);
|
|
}
|
|
module_exit(kirkwood_i2s_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
|
|
MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:kirkwood-i2s");
|