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Commit fc93ea2f authored by Jassi Brar's avatar Jassi Brar Committed by Mark Brown
Browse files

ASoC: AC97: S3C: Add controller driver 



Add the AC97 controller driver for Samsung SoCs that have one.

Signed-off-by: default avatarJassi Brar <jassi.brar@samsung.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 994dc424

sound/soc/s3c24xx/Kconfig

+5 −1
Original line number Diff line number Diff line
@@ -33,6 +33,10 @@ config SND_S3C2443_SOC_AC97 
	select AC97_BUS

	select SND_SOC_AC97_BUS



config SND_S3C_SOC_AC97

	tristate

	select SND_SOC_AC97_BUS



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 −1
Original line number Diff line number Diff line
@@ -4,12 +4,14 @@ snd-soc-s3c24xx-i2s-objs := s3c24xx-i2s.o 
snd-soc-s3c2412-i2s-objs := s3c2412-i2s.o

snd-soc-s3c64xx-i2s-objs := s3c64xx-i2s.o

snd-soc-s3c2443-ac97-objs := s3c2443-ac97.o

snd-soc-s3c-ac97-objs := s3c-ac97.o

snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o

snd-soc-s3c-pcm-objs := s3c-pcm.o



obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o

obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o

obj-$(CONFIG_SND_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.o

obj-$(CONFIG_SND_S3C_SOC_AC97) += snd-soc-s3c-ac97.o

obj-$(CONFIG_SND_S3C2412_SOC_I2S) += snd-soc-s3c2412-i2s.o

obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += snd-soc-s3c64xx-i2s.o

obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o
@@ -37,4 +39,3 @@ obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC) += snd-soc-s3c24xx-simtec.o 
obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC_HERMES) += snd-soc-s3c24xx-simtec-hermes.o

obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC_TLV320AIC23) += snd-soc-s3c24xx-simtec-tlv320aic23.o

obj-$(CONFIG_SND_S3C64XX_SOC_WM8580) += snd-soc-smdk64xx-wm8580.o

sound/soc/s3c24xx/s3c-ac97.c

0 → 100644
+518 −0
Original line number Diff line number Diff line 
/* sound/soc/s3c24xx/s3c-ac97.c

 *

 * ALSA SoC Audio Layer - S3C AC97 Controller driver

 * 	Evolved from s3c2443-ac97.c

 *

 * Copyright (c) 2010 Samsung Electronics Co. Ltd

 * 	Author: Jaswinder Singh <jassi.brar@samsung.com>

 * 	Credits: Graeme Gregory, Sean Choi

 *

 * 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/init.h>

#include <linux/module.h>

#include <linux/io.h>

#include <linux/delay.h>

#include <linux/clk.h>



#include <sound/soc.h>



#include <plat/regs-ac97.h>

#include <mach/dma.h>

#include <plat/audio.h>



#include "s3c-dma.h"

#include "s3c-ac97.h"



#define AC_CMD_ADDR(x) (x << 16)

#define AC_CMD_DATA(x) (x & 0xffff)



struct s3c_ac97_info {

	unsigned           state;

	struct clk         *ac97_clk;

	void __iomem	   *regs;

	struct mutex       lock;

	struct completion  done;

};

static struct s3c_ac97_info s3c_ac97;



static struct s3c2410_dma_client s3c_dma_client_out = {

	.name = "AC97 PCMOut"

};



static struct s3c2410_dma_client s3c_dma_client_in = {

	.name = "AC97 PCMIn"

};



static struct s3c2410_dma_client s3c_dma_client_micin = {

	.name = "AC97 MicIn"

};



static struct s3c_dma_params s3c_ac97_pcm_out = {

	.client		= &s3c_dma_client_out,

	.dma_size	= 4,

};



static struct s3c_dma_params s3c_ac97_pcm_in = {

	.client		= &s3c_dma_client_in,

	.dma_size	= 4,

};



static struct s3c_dma_params s3c_ac97_mic_in = {

	.client		= &s3c_dma_client_micin,

	.dma_size	= 4,

};



static void s3c_ac97_activate(struct snd_ac97 *ac97)

{

	u32 ac_glbctrl, stat;



	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;

	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)

		return; /* Return if already active */



	INIT_COMPLETION(s3c_ac97.done);



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);



	ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))

		printk(KERN_ERR "AC97: Unable to activate!");

}



static unsigned short s3c_ac97_read(struct snd_ac97 *ac97,

	unsigned short reg)

{

	u32 ac_glbctrl, ac_codec_cmd;

	u32 stat, addr, data;



	mutex_lock(&s3c_ac97.lock);



	s3c_ac97_activate(ac97);



	INIT_COMPLETION(s3c_ac97.done);



	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);

	ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);

	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);



	udelay(50);



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))

		printk(KERN_ERR "AC97: Unable to read!");



	stat = readl(s3c_ac97.regs + S3C_AC97_STAT);

	addr = (stat >> 16) & 0x7f;

	data = (stat & 0xffff);



	if (addr != reg)

		printk(KERN_ERR "s3c-ac97: req addr = %02x, rep addr = %02x\n", reg, addr);



	mutex_unlock(&s3c_ac97.lock);



	return (unsigned short)data;

}



static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg,

	unsigned short val)

{

	u32 ac_glbctrl, ac_codec_cmd;



	mutex_lock(&s3c_ac97.lock);



	s3c_ac97_activate(ac97);



	INIT_COMPLETION(s3c_ac97.done);



	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);

	ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);

	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);



	udelay(50);



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))

		printk(KERN_ERR "AC97: Unable to write!");



	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);

	ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;

	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);



	mutex_unlock(&s3c_ac97.lock);

}



static void s3c_ac97_cold_reset(struct snd_ac97 *ac97)

{

	writel(S3C_AC97_GLBCTRL_COLDRESET,

			s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);



	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);

}



static void s3c_ac97_warm_reset(struct snd_ac97 *ac97)

{

	u32 stat;



	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;

	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)

		return; /* Return if already active */



	writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);



	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);

	msleep(1);



	s3c_ac97_activate(ac97);

}



static irqreturn_t s3c_ac97_irq(int irq, void *dev_id)

{

	u32 ac_glbctrl, ac_glbstat;



	ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT);



	if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) {



		ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

		ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;

		writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



		complete(&s3c_ac97.done);

	}



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl |= (1<<30); /* Clear interrupt */

	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	return IRQ_HANDLED;

}



struct snd_ac97_bus_ops soc_ac97_ops = {

	.read       = s3c_ac97_read,

	.write      = s3c_ac97_write,

	.warm_reset = s3c_ac97_warm_reset,

	.reset      = s3c_ac97_cold_reset,

};

EXPORT_SYMBOL_GPL(soc_ac97_ops);



static int s3c_ac97_hw_params(struct snd_pcm_substream *substream,

				  struct snd_pcm_hw_params *params,

				  struct snd_soc_dai *dai)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

		cpu_dai->dma_data = &s3c_ac97_pcm_out;

	else

		cpu_dai->dma_data = &s3c_ac97_pcm_in;



	return 0;

}



static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,

				struct snd_soc_dai *dai)

{

	u32 ac_glbctrl;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	int channel = ((struct s3c_dma_params *)

		  rtd->dai->cpu_dai->dma_data)->channel;



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)

		ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;

	else

		ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_RESUME:

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)

			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;

		else

			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;

		break;



	case SNDRV_PCM_TRIGGER_STOP:

	case SNDRV_PCM_TRIGGER_SUSPEND:

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		break;

	}



	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);



	return 0;

}



static int s3c_ac97_hw_mic_params(struct snd_pcm_substream *substream,

				      struct snd_pcm_hw_params *params,

				      struct snd_soc_dai *dai)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

		return -ENODEV;

	else

		cpu_dai->dma_data = &s3c_ac97_mic_in;



	return 0;

}



static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,

				    int cmd, struct snd_soc_dai *dai)

{

	u32 ac_glbctrl;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	int channel = ((struct s3c_dma_params *)

		  rtd->dai->cpu_dai->dma_data)->channel;



	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);

	ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK;



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_RESUME:

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA;

		break;



	case SNDRV_PCM_TRIGGER_STOP:

	case SNDRV_PCM_TRIGGER_SUSPEND:

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		break;

	}



	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);



	s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);



	return 0;

}



static struct snd_soc_dai_ops s3c_ac97_dai_ops = {

	.hw_params	= s3c_ac97_hw_params,

	.trigger	= s3c_ac97_trigger,

};



static struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {

	.hw_params	= s3c_ac97_hw_mic_params,

	.trigger	= s3c_ac97_mic_trigger,

};



struct snd_soc_dai s3c_ac97_dai[] = {

	[S3C_AC97_DAI_PCM] = {

		.name =	"s3c-ac97",

		.id = S3C_AC97_DAI_PCM,

		.ac97_control = 1,

		.playback = {

			.stream_name = "AC97 Playback",

			.channels_min = 2,

			.channels_max = 2,

			.rates = SNDRV_PCM_RATE_8000_48000,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,},

		.capture = {

			.stream_name = "AC97 Capture",

			.channels_min = 2,

			.channels_max = 2,

			.rates = SNDRV_PCM_RATE_8000_48000,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,},

		.ops = &s3c_ac97_dai_ops,

	},

	[S3C_AC97_DAI_MIC] = {

		.name = "s3c-ac97-mic",

		.id = S3C_AC97_DAI_MIC,

		.ac97_control = 1,

		.capture = {

			.stream_name = "AC97 Mic Capture",

			.channels_min = 1,

			.channels_max = 1,

			.rates = SNDRV_PCM_RATE_8000_48000,

			.formats = SNDRV_PCM_FMTBIT_S16_LE,},

		.ops = &s3c_ac97_mic_dai_ops,

	},

};

EXPORT_SYMBOL_GPL(s3c_ac97_dai);



static __devinit int s3c_ac97_probe(struct platform_device *pdev)

{

	struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res;

	struct s3c_audio_pdata *ac97_pdata;

	int ret;



	ac97_pdata = pdev->dev.platform_data;

	if (!ac97_pdata || !ac97_pdata->cfg_gpio) {

		dev_err(&pdev->dev, "cfg_gpio callback not provided!\n");

		return -EINVAL;

	}



	/* Check for availability of necessary resource */

	dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);

	if (!dmatx_res) {

		dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n");

		return -ENXIO;

	}



	dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);

	if (!dmarx_res) {

		dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n");

		return -ENXIO;

	}



	dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2);

	if (!dmamic_res) {

		dev_err(&pdev->dev, "Unable to get AC97-MIC 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;

	}



	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!irq_res) {

		dev_err(&pdev->dev, "AC97 IRQ not provided!\n");

		return -ENXIO;

	}



	if (!request_mem_region(mem_res->start,

				resource_size(mem_res), "s3c-ac97")) {

		dev_err(&pdev->dev, "Unable to request register region\n");

		return -EBUSY;

	}



	s3c_ac97_pcm_out.channel = dmatx_res->start;

	s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;

	s3c_ac97_pcm_in.channel = dmarx_res->start;

	s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;

	s3c_ac97_mic_in.channel = dmamic_res->start;

	s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA;



	init_completion(&s3c_ac97.done);

	mutex_init(&s3c_ac97.lock);



	s3c_ac97.regs = ioremap(mem_res->start, resource_size(mem_res));

	if (s3c_ac97.regs == NULL) {

		dev_err(&pdev->dev, "Unable to ioremap register region\n");

		ret = -ENXIO;

		goto err1;

	}



	s3c_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");

	if (IS_ERR(s3c_ac97.ac97_clk)) {

		dev_err(&pdev->dev, "s3c-ac97 failed to get ac97_clock\n");

		ret = -ENODEV;

		goto err2;

	}

	clk_enable(s3c_ac97.ac97_clk);



	if (ac97_pdata->cfg_gpio(pdev)) {

		dev_err(&pdev->dev, "Unable to configure gpio\n");

		ret = -EINVAL;

		goto err3;

	}



	ret = request_irq(irq_res->start, s3c_ac97_irq,

					IRQF_DISABLED, "AC97", NULL);

	if (ret < 0) {

		printk(KERN_ERR "s3c-ac97: interrupt request failed.\n");

		goto err4;

	}



	s3c_ac97_dai[S3C_AC97_DAI_PCM].dev = &pdev->dev;

	s3c_ac97_dai[S3C_AC97_DAI_MIC].dev = &pdev->dev;



	ret = snd_soc_register_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));

	if (ret)

		goto err5;



	return 0;



err5:

	free_irq(irq_res->start, NULL);

err4:

err3:

	clk_disable(s3c_ac97.ac97_clk);

	clk_put(s3c_ac97.ac97_clk);

err2:

	iounmap(s3c_ac97.regs);

err1:

	release_mem_region(mem_res->start, resource_size(mem_res));



	return ret;

}



static __devexit int s3c_ac97_remove(struct platform_device *pdev)

{

	struct resource *mem_res, *irq_res;



	snd_soc_unregister_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));



	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (irq_res)

		free_irq(irq_res->start, NULL);



	clk_disable(s3c_ac97.ac97_clk);

	clk_put(s3c_ac97.ac97_clk);



	iounmap(s3c_ac97.regs);



	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (mem_res)

		release_mem_region(mem_res->start, resource_size(mem_res));



	return 0;

}



static struct platform_driver s3c_ac97_driver = {

	.probe  = s3c_ac97_probe,

	.remove = s3c_ac97_remove,

	.driver = {

		.name = "s3c-ac97",

		.owner = THIS_MODULE,

	},

};



static int __init s3c_ac97_init(void)

{

	return platform_driver_register(&s3c_ac97_driver);

}

module_init(s3c_ac97_init);



static void __exit s3c_ac97_exit(void)

{

	platform_driver_unregister(&s3c_ac97_driver);

}

module_exit(s3c_ac97_exit);



MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");

MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");

MODULE_LICENSE("GPL");

sound/soc/s3c24xx/s3c-ac97.h

0 → 100644
+23 −0
Original line number Diff line number Diff line 
/* sound/soc/s3c24xx/s3c-ac97.h

 *

 * ALSA SoC Audio Layer - S3C AC97 Controller driver

 * 	Evolved from s3c2443-ac97.h

 *

 * Copyright (c) 2010 Samsung Electronics Co. Ltd

 * 	Author: Jaswinder Singh <jassi.brar@samsung.com>

 * 	Credits: Graeme Gregory, Sean Choi

 *

 * 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 __S3C_AC97_H_

#define __S3C_AC97_H_



#define S3C_AC97_DAI_PCM 0

#define S3C_AC97_DAI_MIC 1



extern struct snd_soc_dai s3c_ac97_dai[];



#endif /* __S3C_AC97_H_ */