[mirror_ubuntu-bionic-kernel.git] / sound / soc / samsung / ac97.c

/* sound/soc/samsung/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 <jassisinghbrar@gmail.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/io.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/module.h>

#include <sound/soc.h>

#include "regs-ac97.h"
#include <linux/platform_data/asoc-s3c.h>

#include "dma.h"

#define AC_CMD_ADDR(x) (x << 16)
#define AC_CMD_DATA(x) (x & 0xffff)

#define S3C_AC97_DAI_PCM 0
#define S3C_AC97_DAI_MIC 1

struct s3c_ac97_info {
	struct clk         *ac97_clk;
	void __iomem	   *regs;
	struct mutex       lock;
	struct completion  done;
};
static struct s3c_ac97_info s3c_ac97;

static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_out = {
	.addr_width	= 4,
};

static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_in = {
	.addr_width	= 4,
};

static struct snd_dmaengine_dai_dma_data s3c_ac97_mic_in = {
	.addr_width	= 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 */

	reinit_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))
		pr_err("AC97: Unable to activate!\n");
}

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);

	reinit_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))
		pr_err("AC97: Unable to read!\n");

	stat = readl(s3c_ac97.regs + S3C_AC97_STAT);
	addr = (stat >> 16) & 0x7f;
	data = (stat & 0xffff);

	if (addr != reg)
		pr_err("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);

	reinit_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))
		pr_err("AC97: Unable to write!\n");

	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)
{
	pr_debug("AC97: Cold reset\n");
	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 */

	pr_debug("AC97: Warm reset\n");

	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;
}

static struct snd_ac97_bus_ops s3c_ac97_ops = {
	.read       = s3c_ac97_read,
	.write      = s3c_ac97_write,
	.warm_reset = s3c_ac97_warm_reset,
	.reset      = s3c_ac97_cold_reset,
};

static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
				struct snd_soc_dai *dai)
{
	u32 ac_glbctrl;

	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);

	return 0;
}

static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
				    int cmd, struct snd_soc_dai *dai)
{
	u32 ac_glbctrl;

	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);

	return 0;
}

static const struct snd_soc_dai_ops s3c_ac97_dai_ops = {
	.trigger	= s3c_ac97_trigger,
};

static const struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
	.trigger	= s3c_ac97_mic_trigger,
};

static int s3c_ac97_dai_probe(struct snd_soc_dai *dai)
{
	snd_soc_dai_init_dma_data(dai, &s3c_ac97_pcm_out, &s3c_ac97_pcm_in);

	return 0;
}

static int s3c_ac97_mic_dai_probe(struct snd_soc_dai *dai)
{
	snd_soc_dai_init_dma_data(dai, NULL, &s3c_ac97_mic_in);

	return 0;
}

static struct snd_soc_dai_driver s3c_ac97_dai[] = {
	[S3C_AC97_DAI_PCM] = {
		.name =	"samsung-ac97",
		.bus_control = true,
		.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,},
		.probe = s3c_ac97_dai_probe,
		.ops = &s3c_ac97_dai_ops,
	},
	[S3C_AC97_DAI_MIC] = {
		.name = "samsung-ac97-mic",
		.bus_control = true,
		.capture = {
			.stream_name = "AC97 Mic Capture",
			.channels_min = 1,
			.channels_max = 1,
			.rates = SNDRV_PCM_RATE_8000_48000,
			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
		.probe = s3c_ac97_mic_dai_probe,
		.ops = &s3c_ac97_mic_dai_ops,
	},
};

static const struct snd_soc_component_driver s3c_ac97_component = {
	.name		= "s3c-ac97",
};

static int s3c_ac97_probe(struct platform_device *pdev)
{
	struct resource *mem_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 */
	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!irq_res) {
		dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
		return -ENXIO;
	}

	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	s3c_ac97.regs = devm_ioremap_resource(&pdev->dev, mem_res);
	if (IS_ERR(s3c_ac97.regs))
		return PTR_ERR(s3c_ac97.regs);

	s3c_ac97_pcm_out.filter_data = ac97_pdata->dma_playback;
	s3c_ac97_pcm_out.addr = mem_res->start + S3C_AC97_PCM_DATA;
	s3c_ac97_pcm_in.filter_data = ac97_pdata->dma_capture;
	s3c_ac97_pcm_in.addr = mem_res->start + S3C_AC97_PCM_DATA;
	s3c_ac97_mic_in.filter_data = ac97_pdata->dma_capture_mic;
	s3c_ac97_mic_in.addr = mem_res->start + S3C_AC97_MIC_DATA;

	init_completion(&s3c_ac97.done);
	mutex_init(&s3c_ac97.lock);

	s3c_ac97.ac97_clk = devm_clk_get(&pdev->dev, "ac97");
	if (IS_ERR(s3c_ac97.ac97_clk)) {
		dev_err(&pdev->dev, "ac97 failed to get ac97_clock\n");
		ret = -ENODEV;
		goto err2;
	}
	clk_prepare_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,
					0, "AC97", NULL);
	if (ret < 0) {
		dev_err(&pdev->dev, "ac97: interrupt request failed.\n");
		goto err4;
	}

	ret = snd_soc_set_ac97_ops(&s3c_ac97_ops);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
		goto err4;
	}

	ret = samsung_asoc_dma_platform_register(&pdev->dev,
						 ac97_pdata->dma_filter,
						 NULL, NULL);
	if (ret) {
		dev_err(&pdev->dev, "failed to get register DMA: %d\n", ret);
		goto err5;
	}

	ret = devm_snd_soc_register_component(&pdev->dev, &s3c_ac97_component,
					 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_unprepare(s3c_ac97.ac97_clk);
err2:
	snd_soc_set_ac97_ops(NULL);
	return ret;
}

static int s3c_ac97_remove(struct platform_device *pdev)
{
	struct resource *irq_res;

	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (irq_res)
		free_irq(irq_res->start, NULL);

	clk_disable_unprepare(s3c_ac97.ac97_clk);
	snd_soc_set_ac97_ops(NULL);

	return 0;
}

static struct platform_driver s3c_ac97_driver = {
	.probe  = s3c_ac97_probe,
	.remove = s3c_ac97_remove,
	.driver = {
		.name = "samsung-ac97",
	},
};

module_platform_driver(s3c_ac97_driver);

MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:samsung-ac97");
Commit	Line	Data
5033f43c	1	/* sound/soc/samsung/ac97.c
fc93ea2f JB	2	*
	3	* ALSA SoC Audio Layer - S3C AC97 Controller driver
	4	* Evolved from s3c2443-ac97.c
	5	*
	6	* Copyright (c) 2010 Samsung Electronics Co. Ltd
df8ad335	7	* Author: Jaswinder Singh <jassisinghbrar@gmail.com>
fc93ea2f JB	8	* Credits: Graeme Gregory, Sean Choi
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
fc93ea2f JB	15	#include <linux/io.h>
	16	#include <linux/delay.h>
	17	#include <linux/clk.h>
da155d5b	18	#include <linux/module.h>
fc93ea2f JB	19
	20	#include <sound/soc.h>
	21
5d229ce5	22	#include "regs-ac97.h"
436d42c6	23	#include <linux/platform_data/asoc-s3c.h>
fc93ea2f	24
4b640cf3	25	#include "dma.h"
fc93ea2f JB	26
	27	#define AC_CMD_ADDR(x) (x << 16)
	28	#define AC_CMD_DATA(x) (x & 0xffff)
	29
4f644ea7 SY	30	#define S3C_AC97_DAI_PCM 0
	31	#define S3C_AC97_DAI_MIC 1
	32
fc93ea2f	33	struct s3c_ac97_info {
fc93ea2f JB	34	struct clk *ac97_clk;
	35	void __iomem *regs;
	36	struct mutex lock;
	37	struct completion done;
	38	};
	39	static struct s3c_ac97_info s3c_ac97;
	40
996d81e1 SN	41	static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_out = {
996d81e1 SN	42	.addr_width = 4,
fc93ea2f JB	43	};
fc93ea2f JB	44
996d81e1 SN	45	static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_in = {
996d81e1 SN	46	.addr_width = 4,
fc93ea2f JB	47	};
fc93ea2f JB	48
996d81e1 SN	49	static struct snd_dmaengine_dai_dma_data s3c_ac97_mic_in = {
996d81e1 SN	50	.addr_width = 4,
fc93ea2f JB	51	};
	52
	53	static void s3c_ac97_activate(struct snd_ac97 *ac97)
	54	{
	55	u32 ac_glbctrl, stat;
	56
	57	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
	58	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
	59	return; /* Return if already active */
	60
16735d02	61	reinit_completion(&s3c_ac97.done);
fc93ea2f JB	62
	63	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	64	ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
	65	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	66	msleep(1);
	67
	68	ac_glbctrl \|= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
	69	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	70	msleep(1);
	71
	72	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	73	ac_glbctrl \|= S3C_AC97_GLBCTRL_CODECREADYIE;
	74	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	75
	76	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
5f6af6a7	77	pr_err("AC97: Unable to activate!\n");
fc93ea2f JB	78	}
	79
	80	static unsigned short s3c_ac97_read(struct snd_ac97 *ac97,
	81	unsigned short reg)
	82	{
	83	u32 ac_glbctrl, ac_codec_cmd;
	84	u32 stat, addr, data;
	85
	86	mutex_lock(&s3c_ac97.lock);
	87
	88	s3c_ac97_activate(ac97);
	89
16735d02	90	reinit_completion(&s3c_ac97.done);
fc93ea2f JB	91
	92	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	93	ac_codec_cmd = S3C_AC97_CODEC_CMD_READ \| AC_CMD_ADDR(reg);
	94	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	95
	96	udelay(50);
	97
	98	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	99	ac_glbctrl \|= S3C_AC97_GLBCTRL_CODECREADYIE;
	100	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	101
	102	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
5f6af6a7	103	pr_err("AC97: Unable to read!\n");
fc93ea2f JB	104
	105	stat = readl(s3c_ac97.regs + S3C_AC97_STAT);
	106	addr = (stat >> 16) & 0x7f;
	107	data = (stat & 0xffff);
	108
	109	if (addr != reg)
99ce3a3f	110	pr_err("ac97: req addr = %02x, rep addr = %02x\n",
4a6f998e	111	reg, addr);
fc93ea2f JB	112
	113	mutex_unlock(&s3c_ac97.lock);
	114
	115	return (unsigned short)data;
	116	}
	117
	118	static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	119	unsigned short val)
	120	{
	121	u32 ac_glbctrl, ac_codec_cmd;
	122
	123	mutex_lock(&s3c_ac97.lock);
	124
	125	s3c_ac97_activate(ac97);
	126
16735d02	127	reinit_completion(&s3c_ac97.done);
fc93ea2f JB	128
	129	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	130	ac_codec_cmd = AC_CMD_ADDR(reg) \| AC_CMD_DATA(val);
	131	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	132
	133	udelay(50);
	134
	135	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	136	ac_glbctrl \|= S3C_AC97_GLBCTRL_CODECREADYIE;
	137	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	138
	139	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
5f6af6a7	140	pr_err("AC97: Unable to write!\n");
fc93ea2f JB	141
	142	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	143	ac_codec_cmd \|= S3C_AC97_CODEC_CMD_READ;
	144	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
	145
	146	mutex_unlock(&s3c_ac97.lock);
	147	}
	148
	149	static void s3c_ac97_cold_reset(struct snd_ac97 *ac97)
	150	{
8d85d741	151	pr_debug("AC97: Cold reset\n");
fc93ea2f JB	152	writel(S3C_AC97_GLBCTRL_COLDRESET,
	153	s3c_ac97.regs + S3C_AC97_GLBCTRL);
	154	msleep(1);
	155
	156	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	157	msleep(1);
	158	}
	159
	160	static void s3c_ac97_warm_reset(struct snd_ac97 *ac97)
	161	{
	162	u32 stat;
	163
	164	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
	165	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
	166	return; /* Return if already active */
	167
8d85d741 MB	168	pr_debug("AC97: Warm reset\n");
8d85d741 MB	169
fc93ea2f JB	170	writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	171	msleep(1);
	172
	173	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	174	msleep(1);
	175
	176	s3c_ac97_activate(ac97);
	177	}
	178
	179	static irqreturn_t s3c_ac97_irq(int irq, void *dev_id)
	180	{
	181	u32 ac_glbctrl, ac_glbstat;
	182
	183	ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT);
	184
	185	if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) {
	186
	187	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	188	ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
	189	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	190
	191	complete(&s3c_ac97.done);
	192	}
	193
	194	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	195	ac_glbctrl \|= (1<<30); /* Clear interrupt */
	196	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	197
	198	return IRQ_HANDLED;
	199	}
	200
b047e1cc	201	static struct snd_ac97_bus_ops s3c_ac97_ops = {
fc93ea2f JB	202	.read = s3c_ac97_read,
	203	.write = s3c_ac97_write,
	204	.warm_reset = s3c_ac97_warm_reset,
	205	.reset = s3c_ac97_cold_reset,
	206	};
fc93ea2f	207
fc93ea2f JB	208	static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
	209	struct snd_soc_dai *dai)
	210	{
	211	u32 ac_glbctrl;
fc93ea2f JB	212
	213	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	214	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	215	ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
	216	else
	217	ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
	218
	219	switch (cmd) {
	220	case SNDRV_PCM_TRIGGER_START:
	221	case SNDRV_PCM_TRIGGER_RESUME:
	222	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	223	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	224	ac_glbctrl \|= S3C_AC97_GLBCTRL_PCMINTM_DMA;
	225	else
	226	ac_glbctrl \|= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
	227	break;
	228
	229	case SNDRV_PCM_TRIGGER_STOP:
	230	case SNDRV_PCM_TRIGGER_SUSPEND:
	231	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	232	break;
	233	}
	234
	235	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	236
fc93ea2f JB	237	return 0;
	238	}
	239
fc93ea2f JB	240	static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
	241	int cmd, struct snd_soc_dai *dai)
	242	{
	243	u32 ac_glbctrl;
fc93ea2f JB	244
	245	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
	246	ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK;
	247
	248	switch (cmd) {
	249	case SNDRV_PCM_TRIGGER_START:
	250	case SNDRV_PCM_TRIGGER_RESUME:
	251	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	252	ac_glbctrl \|= S3C_AC97_GLBCTRL_MICINTM_DMA;
	253	break;
	254
	255	case SNDRV_PCM_TRIGGER_STOP:
	256	case SNDRV_PCM_TRIGGER_SUSPEND:
	257	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	258	break;
	259	}
	260
	261	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
	262
fc93ea2f JB	263	return 0;
	264	}
	265
85e7652d	266	static const struct snd_soc_dai_ops s3c_ac97_dai_ops = {
fc93ea2f JB	267	.trigger = s3c_ac97_trigger,
	268	};
	269
85e7652d	270	static const struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
fc93ea2f JB	271	.trigger = s3c_ac97_mic_trigger,
	272	};
	273
3688569e MB	274	static int s3c_ac97_dai_probe(struct snd_soc_dai *dai)
3688569e MB	275	{
996d81e1	276	snd_soc_dai_init_dma_data(dai, &s3c_ac97_pcm_out, &s3c_ac97_pcm_in);
3688569e MB	277
	278	return 0;
	279	}
	280
	281	static int s3c_ac97_mic_dai_probe(struct snd_soc_dai *dai)
	282	{
996d81e1	283	snd_soc_dai_init_dma_data(dai, NULL, &s3c_ac97_mic_in);
3688569e MB	284
	285	return 0;
	286	}
	287
f0fba2ad	288	static struct snd_soc_dai_driver s3c_ac97_dai[] = {
fc93ea2f	289	[S3C_AC97_DAI_PCM] = {
99ce3a3f	290	.name = "samsung-ac97",
bc263214	291	.bus_control = true,
fc93ea2f JB	292	.playback = {
	293	.stream_name = "AC97 Playback",
	294	.channels_min = 2,
	295	.channels_max = 2,
	296	.rates = SNDRV_PCM_RATE_8000_48000,
	297	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	298	.capture = {
	299	.stream_name = "AC97 Capture",
	300	.channels_min = 2,
	301	.channels_max = 2,
	302	.rates = SNDRV_PCM_RATE_8000_48000,
	303	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
3688569e	304	.probe = s3c_ac97_dai_probe,
fc93ea2f JB	305	.ops = &s3c_ac97_dai_ops,
	306	},
	307	[S3C_AC97_DAI_MIC] = {
99ce3a3f	308	.name = "samsung-ac97-mic",
bc263214	309	.bus_control = true,
fc93ea2f JB	310	.capture = {
	311	.stream_name = "AC97 Mic Capture",
	312	.channels_min = 1,
	313	.channels_max = 1,
	314	.rates = SNDRV_PCM_RATE_8000_48000,
	315	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
3688569e	316	.probe = s3c_ac97_mic_dai_probe,
fc93ea2f JB	317	.ops = &s3c_ac97_mic_dai_ops,
	318	},
	319	};
fc93ea2f	320
6d717f3e KM	321	static const struct snd_soc_component_driver s3c_ac97_component = {
	322	.name = "s3c-ac97",
	323	};
	324
fdca21ad	325	static int s3c_ac97_probe(struct platform_device *pdev)
fc93ea2f	326	{
b9a1a743	327	struct resource mem_res, irq_res;
fc93ea2f JB	328	struct s3c_audio_pdata *ac97_pdata;
	329	int ret;
	330
	331	ac97_pdata = pdev->dev.platform_data;
	332	if (!ac97_pdata \|\| !ac97_pdata->cfg_gpio) {
	333	dev_err(&pdev->dev, "cfg_gpio callback not provided!\n");
	334	return -EINVAL;
	335	}
	336
	337	/* Check for availability of necessary resource */
fc93ea2f JB	338	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	339	if (!irq_res) {
	340	dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
	341	return -ENXIO;
	342	}
	343
64efc5a0	344	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
25fd0bfd MB	345	s3c_ac97.regs = devm_ioremap_resource(&pdev->dev, mem_res);
	346	if (IS_ERR(s3c_ac97.regs))
	347	return PTR_ERR(s3c_ac97.regs);
fc93ea2f	348
996d81e1 SN	349	s3c_ac97_pcm_out.filter_data = ac97_pdata->dma_playback;
	350	s3c_ac97_pcm_out.addr = mem_res->start + S3C_AC97_PCM_DATA;
	351	s3c_ac97_pcm_in.filter_data = ac97_pdata->dma_capture;
	352	s3c_ac97_pcm_in.addr = mem_res->start + S3C_AC97_PCM_DATA;
	353	s3c_ac97_mic_in.filter_data = ac97_pdata->dma_capture_mic;
	354	s3c_ac97_mic_in.addr = mem_res->start + S3C_AC97_MIC_DATA;
fc93ea2f JB	355
	356	init_completion(&s3c_ac97.done);
	357	mutex_init(&s3c_ac97.lock);
	358
5d45ee3c	359	s3c_ac97.ac97_clk = devm_clk_get(&pdev->dev, "ac97");
fc93ea2f	360	if (IS_ERR(s3c_ac97.ac97_clk)) {
99ce3a3f	361	dev_err(&pdev->dev, "ac97 failed to get ac97_clock\n");
fc93ea2f JB	362	ret = -ENODEV;
	363	goto err2;
	364	}
54f174ab	365	clk_prepare_enable(s3c_ac97.ac97_clk);
fc93ea2f JB	366
	367	if (ac97_pdata->cfg_gpio(pdev)) {
	368	dev_err(&pdev->dev, "Unable to configure gpio\n");
	369	ret = -EINVAL;
	370	goto err3;
	371	}
	372
	373	ret = request_irq(irq_res->start, s3c_ac97_irq,
88e24c3a	374	0, "AC97", NULL);
fc93ea2f	375	if (ret < 0) {
99ce3a3f	376	dev_err(&pdev->dev, "ac97: interrupt request failed.\n");
fc93ea2f JB	377	goto err4;
	378	}
	379
b047e1cc MB	380	ret = snd_soc_set_ac97_ops(&s3c_ac97_ops);
	381	if (ret != 0) {
	382	dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
	383	goto err4;
	384	}
	385
9bdca822	386	ret = samsung_asoc_dma_platform_register(&pdev->dev,
42a74e77 SN	387	ac97_pdata->dma_filter,
42a74e77 SN	388	NULL, NULL);
a08485d8 PV	389	if (ret) {
a08485d8 PV	390	dev_err(&pdev->dev, "failed to get register DMA: %d\n", ret);
7253e354	391	goto err5;
a08485d8	392	}
fc93ea2f	393
73f5dfc6 MS	394	ret = devm_snd_soc_register_component(&pdev->dev, &s3c_ac97_component,
	395	s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));
	396	if (ret)
	397	goto err5;
	398
a08485d8	399	return 0;
fc93ea2f JB	400	err5:
	401	free_irq(irq_res->start, NULL);
	402	err4:
	403	err3:
54f174ab	404	clk_disable_unprepare(s3c_ac97.ac97_clk);
fc93ea2f	405	err2:
b047e1cc	406	snd_soc_set_ac97_ops(NULL);
fc93ea2f JB	407	return ret;
	408	}
	409
fdca21ad	410	static int s3c_ac97_remove(struct platform_device *pdev)
fc93ea2f	411	{
25fd0bfd	412	struct resource *irq_res;
fc93ea2f	413
fc93ea2f JB	414	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	415	if (irq_res)
	416	free_irq(irq_res->start, NULL);
	417
54f174ab	418	clk_disable_unprepare(s3c_ac97.ac97_clk);
b047e1cc	419	snd_soc_set_ac97_ops(NULL);
fc93ea2f	420
fc93ea2f JB	421	return 0;
	422	}
	423
	424	static struct platform_driver s3c_ac97_driver = {
	425	.probe = s3c_ac97_probe,
fdca21ad	426	.remove = s3c_ac97_remove,
fc93ea2f	427	.driver = {
e6104673	428	.name = "samsung-ac97",
fc93ea2f JB	429	},
	430	};
	431
e00c3f55	432	module_platform_driver(s3c_ac97_driver);
fc93ea2f	433
df8ad335	434	MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
fc93ea2f JB	435	MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");
fc93ea2f JB	436	MODULE_LICENSE("GPL");
e6104673	437	MODULE_ALIAS("platform:samsung-ac97");