mirror of https://gitee.com/openkylin/linux.git
259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// 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>
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <sound/soc.h>
|
|
#include <sound/pcm_params.h>
|
|
|
|
#include <mach/gpio-samsung.h>
|
|
#include <plat/gpio-cfg.h>
|
|
|
|
#include "dma.h"
|
|
#include "regs-i2s-v2.h"
|
|
#include "s3c2412-i2s.h"
|
|
|
|
#include <linux/platform_data/asoc-s3c.h>
|
|
|
|
static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
|
|
.chan_name = "tx",
|
|
.addr_width = 4,
|
|
};
|
|
|
|
static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
|
|
.chan_name = "rx",
|
|
.addr_width = 4,
|
|
};
|
|
|
|
static struct s3c_i2sv2_info s3c2412_i2s;
|
|
|
|
static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
|
|
{
|
|
int ret;
|
|
|
|
pr_debug("Entered %s\n", __func__);
|
|
|
|
snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
|
|
&s3c2412_i2s_pcm_stereo_in);
|
|
|
|
ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
|
|
s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
|
|
|
|
s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk");
|
|
if (IS_ERR(s3c2412_i2s.iis_cclk)) {
|
|
pr_err("failed to get i2sclk clock\n");
|
|
ret = PTR_ERR(s3c2412_i2s.iis_cclk);
|
|
goto err;
|
|
}
|
|
|
|
/* Set MPLL as the source for IIS CLK */
|
|
|
|
clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
|
|
ret = clk_prepare_enable(s3c2412_i2s.iis_cclk);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* 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);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
|
|
{
|
|
clk_disable_unprepare(s3c2412_i2s.iis_cclk);
|
|
s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
|
|
u32 iismod;
|
|
|
|
pr_debug("Entered %s\n", __func__);
|
|
|
|
iismod = readl(i2s->regs + S3C2412_IISMOD);
|
|
pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
|
|
|
|
switch (params_width(params)) {
|
|
case 8:
|
|
iismod |= S3C2412_IISMOD_8BIT;
|
|
break;
|
|
case 16:
|
|
iismod &= ~S3C2412_IISMOD_8BIT;
|
|
break;
|
|
}
|
|
|
|
writel(iismod, i2s->regs + S3C2412_IISMOD);
|
|
pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int s3c2412_i2s_suspend(struct snd_soc_component *component)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
|
|
u32 iismod;
|
|
|
|
if (component->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)
|
|
pr_warn("%s: RXDMA active?\n", __func__);
|
|
|
|
if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
|
|
pr_warn("%s: TXDMA active?\n", __func__);
|
|
|
|
if (iismod & S3C2412_IISCON_IIS_ACTIVE)
|
|
pr_warn("%s: IIS active\n", __func__);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2412_i2s_resume(struct snd_soc_component *component)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
|
|
|
|
pr_info("component_active %d, IISMOD %08x, IISCON %08x\n",
|
|
component->active, i2s->suspend_iismod, i2s->suspend_iiscon);
|
|
|
|
if (component->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
|
|
|
|
#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)
|
|
|
|
static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
|
|
.hw_params = s3c2412_i2s_hw_params,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver s3c2412_i2s_dai = {
|
|
.probe = s3c2412_i2s_probe,
|
|
.remove = s3c2412_i2s_remove,
|
|
.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 = &s3c2412_i2s_dai_ops,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver s3c2412_i2s_component = {
|
|
.name = "s3c2412-i2s",
|
|
.suspend = s3c2412_i2s_suspend,
|
|
.resume = s3c2412_i2s_resume,
|
|
};
|
|
|
|
static int s3c2412_iis_dev_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
struct resource *res;
|
|
struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "missing platform data");
|
|
return -ENXIO;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(s3c2412_i2s.regs))
|
|
return PTR_ERR(s3c2412_i2s.regs);
|
|
|
|
s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
|
|
s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
|
|
s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
|
|
s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
|
|
|
|
ret = samsung_asoc_dma_platform_register(&pdev->dev,
|
|
pdata->dma_filter,
|
|
"tx", "rx", NULL);
|
|
if (ret) {
|
|
pr_err("failed to register the DMA: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = s3c_i2sv2_register_component(&pdev->dev, -1,
|
|
&s3c2412_i2s_component,
|
|
&s3c2412_i2s_dai);
|
|
if (ret)
|
|
pr_err("failed to register the dai\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver s3c2412_iis_driver = {
|
|
.probe = s3c2412_iis_dev_probe,
|
|
.driver = {
|
|
.name = "s3c2412-iis",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(s3c2412_iis_driver);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
|
|
MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:s3c2412-iis");
|