ASoC: SAMSUNG: Add S/PDIF CPU driver (fc127ccc) · Commits · e / devices / android_kernel_sony_msm8998

sound/soc/s3c24xx/Kconfig

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Original line number	Diff line number	Diff line
		@@ -36,6 +36,10 @@ config SND_S3C_SOC_AC97
		tristate
		select SND_SOC_AC97_BUS

		config SND_S5P_SOC_SPDIF
		tristate
		select SND_SOC_SPDIF

		config SND_S3C24XX_SOC_NEO1973_WM8753
		tristate "SoC I2S Audio support for NEO1973 - WM8753"
		depends on SND_S3C24XX_SOC && MACH_NEO1973_GTA01

sound/soc/s3c24xx/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@ snd-soc-s3c-ac97-objs := s3c-ac97.o
		snd-soc-s3c64xx-i2s-v4-objs := s3c64xx-i2s-v4.o
		snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o
		snd-soc-s3c-pcm-objs := s3c-pcm.o
		snd-soc-samsung-spdif-objs := spdif.o

		obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o
		obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o
		@@ -16,6 +17,7 @@ obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += snd-soc-s3c64xx-i2s.o
		obj-$(CONFIG_SND_S3C64XX_SOC_I2S_V4) += snd-soc-s3c64xx-i2s-v4.o
		obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o
		obj-$(CONFIG_SND_S3C_SOC_PCM) += snd-soc-s3c-pcm.o
		obj-$(CONFIG_SND_S5P_SOC_SPDIF) += snd-soc-samsung-spdif.o

		# S3C24XX Machine Support
		snd-soc-jive-wm8750-objs := jive_wm8750.o

sound/soc/s3c24xx/spdif.c

0 → 100644

+501 −0

Original line number	Diff line number	Diff line
		/* sound/soc/s3c24xx/spdif.c
		*
		* ALSA SoC Audio Layer - Samsung S/PDIF Controller driver
		*
		* Copyright (c) 2010 Samsung Electronics Co. Ltd
		* http://www.samsung.com/
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#include <linux/clk.h>
		#include <linux/io.h>

		#include <sound/pcm.h>
		#include <sound/pcm_params.h>
		#include <sound/soc.h>

		#include <plat/audio.h>
		#include <mach/dma.h>

		#include "s3c-dma.h"
		#include "spdif.h"

		/* Registers */
		#define CLKCON 0x00
		#define CON 0x04
		#define BSTAS 0x08
		#define CSTAS 0x0C
		#define DATA_OUTBUF 0x10
		#define DCNT 0x14
		#define BSTAS_S 0x18
		#define DCNT_S 0x1C

		#define CLKCTL_MASK 0x7
		#define CLKCTL_MCLK_EXT (0x1 << 2)
		#define CLKCTL_PWR_ON (0x1 << 0)

		#define CON_MASK 0x3ffffff
		#define CON_FIFO_TH_SHIFT 19
		#define CON_FIFO_TH_MASK (0x7 << 19)
		#define CON_USERDATA_23RDBIT (0x1 << 12)

		#define CON_SW_RESET (0x1 << 5)

		#define CON_MCLKDIV_MASK (0x3 << 3)
		#define CON_MCLKDIV_256FS (0x0 << 3)
		#define CON_MCLKDIV_384FS (0x1 << 3)
		#define CON_MCLKDIV_512FS (0x2 << 3)

		#define CON_PCM_MASK (0x3 << 1)
		#define CON_PCM_16BIT (0x0 << 1)
		#define CON_PCM_20BIT (0x1 << 1)
		#define CON_PCM_24BIT (0x2 << 1)

		#define CON_PCM_DATA (0x1 << 0)

		#define CSTAS_MASK 0x3fffffff
		#define CSTAS_SAMP_FREQ_MASK (0xF << 24)
		#define CSTAS_SAMP_FREQ_44 (0x0 << 24)
		#define CSTAS_SAMP_FREQ_48 (0x2 << 24)
		#define CSTAS_SAMP_FREQ_32 (0x3 << 24)
		#define CSTAS_SAMP_FREQ_96 (0xA << 24)

		#define CSTAS_CATEGORY_MASK (0xFF << 8)
		#define CSTAS_CATEGORY_CODE_CDP (0x01 << 8)

		#define CSTAS_NO_COPYRIGHT (0x1 << 2)

		/**
		* struct samsung_spdif_info - Samsung S/PDIF Controller information
		* @lock: Spin lock for S/PDIF.
		* @dev: The parent device passed to use from the probe.
		* @regs: The pointer to the device register block.
		* @clk_rate: Current clock rate for calcurate ratio.
		* @pclk: The peri-clock pointer for spdif master operation.
		* @sclk: The source clock pointer for making sync signals.
		* @save_clkcon: Backup clkcon reg. in suspend.
		* @save_con: Backup con reg. in suspend.
		* @save_cstas: Backup cstas reg. in suspend.
		* @dma_playback: DMA information for playback channel.
		*/
		struct samsung_spdif_info {
		spinlock_t lock;
		struct device *dev;
		void __iomem *regs;
		unsigned long clk_rate;
		struct clk *pclk;
		struct clk *sclk;
		u32 saved_clkcon;
		u32 saved_con;
		u32 saved_cstas;
		struct s3c_dma_params *dma_playback;
		};

		static struct s3c2410_dma_client spdif_dma_client_out = {
		.name = "S/PDIF Stereo out",
		};

		static struct s3c_dma_params spdif_stereo_out;
		static struct samsung_spdif_info spdif_info;

		static inline struct samsung_spdif_info to_info(struct snd_soc_dai cpu_dai)
		{
		return snd_soc_dai_get_drvdata(cpu_dai);
		}

		static void spdif_snd_txctrl(struct samsung_spdif_info *spdif, int on)
		{
		void __iomem *regs = spdif->regs;
		u32 clkcon;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		clkcon = readl(regs + CLKCON) & CLKCTL_MASK;
		if (on)
		writel(clkcon \| CLKCTL_PWR_ON, regs + CLKCON);
		else
		writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON);
		}

		static int spdif_set_sysclk(struct snd_soc_dai *cpu_dai,
		int clk_id, unsigned int freq, int dir)
		{
		struct samsung_spdif_info *spdif = to_info(cpu_dai);
		u32 clkcon;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		clkcon = readl(spdif->regs + CLKCON);

		if (clk_id == SND_SOC_SPDIF_INT_MCLK)
		clkcon &= ~CLKCTL_MCLK_EXT;
		else
		clkcon \|= CLKCTL_MCLK_EXT;

		writel(clkcon, spdif->regs + CLKCON);

		spdif->clk_rate = freq;

		return 0;
		}

		static int spdif_trigger(struct snd_pcm_substream *substream, int cmd,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai);
		unsigned long flags;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_RESUME:
		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		spin_lock_irqsave(&spdif->lock, flags);
		spdif_snd_txctrl(spdif, 1);
		spin_unlock_irqrestore(&spdif->lock, flags);
		break;
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_SUSPEND:
		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		spin_lock_irqsave(&spdif->lock, flags);
		spdif_snd_txctrl(spdif, 0);
		spin_unlock_irqrestore(&spdif->lock, flags);
		break;
		default:
		return -EINVAL;
		}

		return 0;
		}

		static int spdif_sysclk_ratios[] = {
		512, 384, 256,
		};

		static int spdif_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *socdai)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai);
		void __iomem *regs = spdif->regs;
		struct s3c_dma_params *dma_data;
		u32 con, clkcon, cstas;
		unsigned long flags;
		int i, ratio;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		dma_data = spdif->dma_playback;
		else {
		dev_err(spdif->dev, "Capture is not supported\n");
		return -EINVAL;
		}

		snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data);

		spin_lock_irqsave(&spdif->lock, flags);

		con = readl(regs + CON) & CON_MASK;
		cstas = readl(regs + CSTAS) & CSTAS_MASK;
		clkcon = readl(regs + CLKCON) & CLKCTL_MASK;

		con &= ~CON_FIFO_TH_MASK;
		con \|= (0x7 << CON_FIFO_TH_SHIFT);
		con \|= CON_USERDATA_23RDBIT;
		con \|= CON_PCM_DATA;

		con &= ~CON_PCM_MASK;
		switch (params_format(params)) {
		case SNDRV_PCM_FORMAT_S16_LE:
		con \|= CON_PCM_16BIT;
		break;
		default:
		dev_err(spdif->dev, "Unsupported data size.\n");
		goto err;
		}

		ratio = spdif->clk_rate / params_rate(params);
		for (i = 0; i < ARRAY_SIZE(spdif_sysclk_ratios); i++)
		if (ratio == spdif_sysclk_ratios[i])
		break;
		if (i == ARRAY_SIZE(spdif_sysclk_ratios)) {
		dev_err(spdif->dev, "Invalid clock ratio %ld/%d\n",
		spdif->clk_rate, params_rate(params));
		goto err;
		}

		con &= ~CON_MCLKDIV_MASK;
		switch (ratio) {
		case 256:
		con \|= CON_MCLKDIV_256FS;
		break;
		case 384:
		con \|= CON_MCLKDIV_384FS;
		break;
		case 512:
		con \|= CON_MCLKDIV_512FS;
		break;
		}

		cstas &= ~CSTAS_SAMP_FREQ_MASK;
		switch (params_rate(params)) {
		case 44100:
		cstas \|= CSTAS_SAMP_FREQ_44;
		break;
		case 48000:
		cstas \|= CSTAS_SAMP_FREQ_48;
		break;
		case 32000:
		cstas \|= CSTAS_SAMP_FREQ_32;
		break;
		case 96000:
		cstas \|= CSTAS_SAMP_FREQ_96;
		break;
		default:
		dev_err(spdif->dev, "Invalid sampling rate %d\n",
		params_rate(params));
		goto err;
		}

		cstas &= ~CSTAS_CATEGORY_MASK;
		cstas \|= CSTAS_CATEGORY_CODE_CDP;
		cstas \|= CSTAS_NO_COPYRIGHT;

		writel(con, regs + CON);
		writel(cstas, regs + CSTAS);
		writel(clkcon, regs + CLKCON);

		spin_unlock_irqrestore(&spdif->lock, flags);

		return 0;
		err:
		spin_unlock_irqrestore(&spdif->lock, flags);
		return -EINVAL;
		}

		static void spdif_shutdown(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai);
		void __iomem *regs = spdif->regs;
		u32 con, clkcon;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		con = readl(regs + CON) & CON_MASK;
		clkcon = readl(regs + CLKCON) & CLKCTL_MASK;

		writel(con \| CON_SW_RESET, regs + CON);
		cpu_relax();

		writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON);
		}

		#ifdef CONFIG_PM
		static int spdif_suspend(struct snd_soc_dai *cpu_dai)
		{
		struct samsung_spdif_info *spdif = to_info(cpu_dai);
		u32 con = spdif->saved_con;

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		spdif->saved_clkcon = readl(spdif->regs + CLKCON) & CLKCTL_MASK;
		spdif->saved_con = readl(spdif->regs + CON) & CON_MASK;
		spdif->saved_cstas = readl(spdif->regs + CSTAS) & CSTAS_MASK;

		writel(con \| CON_SW_RESET, spdif->regs + CON);
		cpu_relax();

		return 0;
		}

		static int spdif_resume(struct snd_soc_dai *cpu_dai)
		{
		struct samsung_spdif_info *spdif = to_info(cpu_dai);

		dev_dbg(spdif->dev, "Entered %s\n", __func__);

		writel(spdif->saved_clkcon, spdif->regs + CLKCON);
		writel(spdif->saved_con, spdif->regs + CON);
		writel(spdif->saved_cstas, spdif->regs + CSTAS);

		return 0;
		}
		#else
		#define spdif_suspend NULL
		#define spdif_resume NULL
		#endif

		static struct snd_soc_dai_ops spdif_dai_ops = {
		.set_sysclk = spdif_set_sysclk,
		.trigger = spdif_trigger,
		.hw_params = spdif_hw_params,
		.shutdown = spdif_shutdown,
		};

		struct snd_soc_dai_driver samsung_spdif_dai = {
		.name = "samsung-spdif",
		.playback = {
		.stream_name = "S/PDIF Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = (SNDRV_PCM_RATE_32000 \|
		SNDRV_PCM_RATE_44100 \|
		SNDRV_PCM_RATE_48000 \|
		SNDRV_PCM_RATE_96000),
		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
		.ops = &spdif_dai_ops,
		.suspend = spdif_suspend,
		.resume = spdif_resume,
		};

		static __devinit int spdif_probe(struct platform_device *pdev)
		{
		struct s3c_audio_pdata *spdif_pdata;
		struct resource mem_res, dma_res;
		struct samsung_spdif_info *spdif;
		int ret;

		spdif_pdata = pdev->dev.platform_data;

		dev_dbg(&pdev->dev, "Entered %s\n", __func__);

		dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
		if (!dma_res) {
		dev_err(&pdev->dev, "Unable to get dma resource.\n");
		return -ENXIO;
		}

		mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!mem_res) {
		dev_err(&pdev->dev, "Unable to get register resource.\n");
		return -ENXIO;
		}

		if (spdif_pdata && spdif_pdata->cfg_gpio
		&& spdif_pdata->cfg_gpio(pdev)) {
		dev_err(&pdev->dev, "Unable to configure GPIO pins\n");
		return -EINVAL;
		}

		spdif = &spdif_info;
		spdif->dev = &pdev->dev;

		spin_lock_init(&spdif->lock);

		spdif->pclk = clk_get(&pdev->dev, "spdif");
		if (IS_ERR(spdif->pclk)) {
		dev_err(&pdev->dev, "failed to get peri-clock\n");
		ret = -ENOENT;
		goto err0;
		}
		clk_enable(spdif->pclk);

		spdif->sclk = clk_get(&pdev->dev, "sclk_spdif");
		if (IS_ERR(spdif->sclk)) {
		dev_err(&pdev->dev, "failed to get internal source clock\n");
		ret = -ENOENT;
		goto err1;
		}
		clk_enable(spdif->sclk);

		/* Request S/PDIF Register's memory region */
		if (!request_mem_region(mem_res->start,
		resource_size(mem_res), "samsung-spdif")) {
		dev_err(&pdev->dev, "Unable to request register region\n");
		ret = -EBUSY;
		goto err2;
		}

		spdif->regs = ioremap(mem_res->start, 0x100);
		if (spdif->regs == NULL) {
		dev_err(&pdev->dev, "Cannot ioremap registers\n");
		ret = -ENXIO;
		goto err3;
		}

		dev_set_drvdata(&pdev->dev, spdif);

		ret = snd_soc_register_dai(&pdev->dev, &samsung_spdif_dai);
		if (ret != 0) {
		dev_err(&pdev->dev, "fail to register dai\n");
		goto err4;
		}

		spdif_stereo_out.dma_size = 2;
		spdif_stereo_out.client = &spdif_dma_client_out;
		spdif_stereo_out.dma_addr = mem_res->start + DATA_OUTBUF;
		spdif_stereo_out.channel = dma_res->start;

		spdif->dma_playback = &spdif_stereo_out;

		return 0;

		err4:
		iounmap(spdif->regs);
		err3:
		release_mem_region(mem_res->start, resource_size(mem_res));
		err2:
		clk_disable(spdif->sclk);
		clk_put(spdif->sclk);
		err1:
		clk_disable(spdif->pclk);
		clk_put(spdif->pclk);
		err0:
		return ret;
		}

		static __devexit int spdif_remove(struct platform_device *pdev)
		{
		struct samsung_spdif_info *spdif = &spdif_info;
		struct resource *mem_res;

		snd_soc_unregister_dai(&pdev->dev);

		iounmap(spdif->regs);

		mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (mem_res)
		release_mem_region(mem_res->start, resource_size(mem_res));

		clk_disable(spdif->sclk);
		clk_put(spdif->sclk);
		clk_disable(spdif->pclk);
		clk_put(spdif->pclk);

		return 0;
		}

		static struct platform_driver samsung_spdif_driver = {
		.probe = spdif_probe,
		.remove = spdif_remove,
		.driver = {
		.name = "samsung-spdif",
		.owner = THIS_MODULE,
		},
		};

		static int __init spdif_init(void)
		{
		return platform_driver_register(&samsung_spdif_driver);
		}
		module_init(spdif_init);

		static void __exit spdif_exit(void)
		{
		platform_driver_unregister(&samsung_spdif_driver);
		}
		module_exit(spdif_exit);

		MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>");
		MODULE_DESCRIPTION("Samsung S/PDIF Controller Driver");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("platform:samsung-spdif");

sound/soc/s3c24xx/spdif.h

0 → 100644

+19 −0

Original line number	Diff line number	Diff line
		/* sound/soc/s3c24xx/spdif.h
		*
		* ALSA SoC Audio Layer - Samsung S/PDIF Controller driver
		*
		* Copyright (c) 2010 Samsung Electronics Co. Ltd
		* http://www.samsung.com/
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#ifndef __SND_SOC_SAMSUNG_SPDIF_H
		#define __SND_SOC_SAMSUNG_SPDIF_H __FILE__

		#define SND_SOC_SPDIF_INT_MCLK 0
		#define SND_SOC_SPDIF_EXT_MCLK 1

		#endif /* __SND_SOC_SAMSUNG_SPDIF_H */