sound/soc/samsung/s3c2412-i2s.c - linux - Git at Google

 // 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");
	// 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");