[deliverable/linux.git] / sound / soc / kirkwood / kirkwood-i2s.c

/*
 * kirkwood-i2s.c
 *
 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mbus.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <linux/platform_data/asoc-kirkwood.h>
#include <linux/of.h>

#include "kirkwood.h"

#define DRV_NAME	"mvebu-audio"

#define KIRKWOOD_I2S_FORMATS \
	(SNDRV_PCM_FMTBIT_S16_LE | \
	 SNDRV_PCM_FMTBIT_S24_LE | \
	 SNDRV_PCM_FMTBIT_S32_LE)

static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
		unsigned int fmt)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
	unsigned long mask;
	unsigned long value;

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
		mask = KIRKWOOD_I2S_CTL_RJ;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		mask = KIRKWOOD_I2S_CTL_LJ;
		break;
	case SND_SOC_DAIFMT_I2S:
		mask = KIRKWOOD_I2S_CTL_I2S;
		break;
	default:
		return -EINVAL;
	}

	/*
	 * Set same format for playback and record
	 * This avoids some troubles.
	 */
	value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	value |= mask;
	writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);

	value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	value |= mask;
	writel(value, priv->io+KIRKWOOD_I2S_RECCTL);

	return 0;
}

static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
{
	unsigned long value;

	value = KIRKWOOD_DCO_CTL_OFFSET_0;
	switch (rate) {
	default:
	case 44100:
		value |= KIRKWOOD_DCO_CTL_FREQ_11;
		break;
	case 48000:
		value |= KIRKWOOD_DCO_CTL_FREQ_12;
		break;
	case 96000:
		value |= KIRKWOOD_DCO_CTL_FREQ_24;
		break;
	}
	writel(value, io + KIRKWOOD_DCO_CTL);

	/* wait for dco locked */
	do {
		cpu_relax();
		value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
		value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
	} while (value == 0);
}

static void kirkwood_set_rate(struct snd_soc_dai *dai,
	struct kirkwood_dma_data *priv, unsigned long rate)
{
	uint32_t clks_ctrl;

	if (IS_ERR(priv->extclk)) {
		/* use internal dco for the supported rates
		 * defined in kirkwood_i2s_dai */
		dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
			__func__, rate);
		kirkwood_set_dco(priv->io, rate);

		clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
	} else {
		/* use the external clock for the other rates
		 * defined in kirkwood_i2s_dai_extclk */
		dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
			__func__, rate, 256 * rate);
		clk_set_rate(priv->extclk, 256 * rate);

		clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
	}
	writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
}

static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);

	snd_soc_dai_set_dma_data(dai, substream, priv);
	return 0;
}

static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *params,
				 struct snd_soc_dai *dai)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	uint32_t ctl_play, ctl_rec;
	unsigned int i2s_reg;
	unsigned long i2s_value;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		i2s_reg = KIRKWOOD_I2S_PLAYCTL;
	} else {
		i2s_reg = KIRKWOOD_I2S_RECCTL;
	}

	kirkwood_set_rate(dai, priv, params_rate(params));

	i2s_value = readl(priv->io+i2s_reg);
	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;

	/*
	 * Size settings in play/rec i2s control regs and play/rec control
	 * regs must be the same.
	 */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
		ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
			   KIRKWOOD_PLAYCTL_I2S_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
			  KIRKWOOD_RECCTL_I2S_EN;
		break;
	/*
	 * doesn't work... S20_3LE != kirkwood 20bit format ?
	 *
	case SNDRV_PCM_FORMAT_S20_3LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
		ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
			   KIRKWOOD_PLAYCTL_I2S_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
			  KIRKWOOD_RECCTL_I2S_EN;
		break;
	*/
	case SNDRV_PCM_FORMAT_S24_LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
		ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
			   KIRKWOOD_PLAYCTL_I2S_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
			  KIRKWOOD_RECCTL_I2S_EN;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
		ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
			   KIRKWOOD_PLAYCTL_I2S_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
			  KIRKWOOD_RECCTL_I2S_EN;
		break;
	default:
		return -EINVAL;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (params_channels(params) == 1)
			ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
		else
			ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;

		priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
				    KIRKWOOD_PLAYCTL_ENABLE_MASK |
				    KIRKWOOD_PLAYCTL_SIZE_MASK);
		priv->ctl_play |= ctl_play;
	} else {
		priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
		priv->ctl_rec |= ctl_rec;
	}

	writel(i2s_value, priv->io+i2s_reg);

	return 0;
}

static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
				int cmd, struct snd_soc_dai *dai)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	uint32_t ctl, value;

	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
		unsigned timeout = 5000;
		/*
		 * The Armada510 spec says that if we enter pause mode, the
		 * busy bit must be read back as clear _twice_.  Make sure
		 * we respect that otherwise we get DMA underruns.
		 */
		do {
			value = ctl;
			ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
			if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
				break;
			udelay(1);
		} while (timeout--);

		if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
			dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
				   ctl);
	}

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		/* configure */
		ctl = priv->ctl_play;
		value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
		writel(value, priv->io + KIRKWOOD_PLAYCTL);

		/* enable interrupts */
		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* enable playback */
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
		/* stop audio, disable interrupts */
		ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);

		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* disable all playbacks */
		ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
		break;

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
		break;

	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
				int cmd, struct snd_soc_dai *dai)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	uint32_t ctl, value;

	value = readl(priv->io + KIRKWOOD_RECCTL);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		/* configure */
		ctl = priv->ctl_rec;
		value = ctl & ~KIRKWOOD_RECCTL_I2S_EN;
		writel(value, priv->io + KIRKWOOD_RECCTL);

		/* enable interrupts */
		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* enable record */
		writel(ctl, priv->io + KIRKWOOD_RECCTL);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
		/* stop audio, disable interrupts */
		value = readl(priv->io + KIRKWOOD_RECCTL);
		value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
		writel(value, priv->io + KIRKWOOD_RECCTL);

		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* disable all records */
		value = readl(priv->io + KIRKWOOD_RECCTL);
		value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
		writel(value, priv->io + KIRKWOOD_RECCTL);
		break;

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		value = readl(priv->io + KIRKWOOD_RECCTL);
		value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
		writel(value, priv->io + KIRKWOOD_RECCTL);
		break;

	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		value = readl(priv->io + KIRKWOOD_RECCTL);
		value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
		writel(value, priv->io + KIRKWOOD_RECCTL);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
			       struct snd_soc_dai *dai)
{
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return kirkwood_i2s_play_trigger(substream, cmd, dai);
	else
		return kirkwood_i2s_rec_trigger(substream, cmd, dai);

	return 0;
}

static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
{
	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	unsigned long value;
	unsigned int reg_data;

	/* put system in a "safe" state : */
	/* disable audio interrupts */
	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	writel(0, priv->io + KIRKWOOD_INT_MASK);

	reg_data = readl(priv->io + 0x1200);
	reg_data &= (~(0x333FF8));
	reg_data |= 0x111D18;
	writel(reg_data, priv->io + 0x1200);

	msleep(500);

	reg_data = readl(priv->io + 0x1200);
	reg_data &= (~(0x333FF8));
	reg_data |= 0x111D18;
	writel(reg_data, priv->io + 0x1200);

	/* disable playback/record */
	value = readl(priv->io + KIRKWOOD_PLAYCTL);
	value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
	writel(value, priv->io + KIRKWOOD_PLAYCTL);

	value = readl(priv->io + KIRKWOOD_RECCTL);
	value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
	writel(value, priv->io + KIRKWOOD_RECCTL);

	return 0;

}

static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
	.startup	= kirkwood_i2s_startup,
	.trigger	= kirkwood_i2s_trigger,
	.hw_params      = kirkwood_i2s_hw_params,
	.set_fmt        = kirkwood_i2s_set_fmt,
};


static struct snd_soc_dai_driver kirkwood_i2s_dai = {
	.probe = kirkwood_i2s_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
				SNDRV_PCM_RATE_96000,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
				SNDRV_PCM_RATE_96000,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
};

static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk = {
	.probe = kirkwood_i2s_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000 |
			 SNDRV_PCM_RATE_CONTINUOUS |
			 SNDRV_PCM_RATE_KNOT,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000 |
			 SNDRV_PCM_RATE_CONTINUOUS |
			 SNDRV_PCM_RATE_KNOT,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
};

static const struct snd_soc_component_driver kirkwood_i2s_component = {
	.name		= DRV_NAME,
};

static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
{
	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
	struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;
	struct kirkwood_dma_data *priv;
	struct resource *mem;
	struct device_node *np = pdev->dev.of_node;
	int err;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&pdev->dev, "allocation failed\n");
		return -ENOMEM;
	}
	dev_set_drvdata(&pdev->dev, priv);

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	priv->io = devm_ioremap_resource(&pdev->dev, mem);
	if (IS_ERR(priv->io))
		return PTR_ERR(priv->io);

	priv->irq = platform_get_irq(pdev, 0);
	if (priv->irq <= 0) {
		dev_err(&pdev->dev, "platform_get_irq failed\n");
		return -ENXIO;
	}

	if (np) {
		priv->burst = 128;		/* might be 32 or 128 */
	} else if (data) {
		priv->burst = data->burst;
	} else {
		dev_err(&pdev->dev, "no DT nor platform data ?!\n");
		return -EINVAL;
	}

	priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
	if (IS_ERR(priv->clk)) {
		dev_err(&pdev->dev, "no clock\n");
		return PTR_ERR(priv->clk);
	}

	err = clk_prepare_enable(priv->clk);
	if (err < 0)
		return err;

	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
	if (IS_ERR(priv->extclk)) {
		if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
			return -EPROBE_DEFER;
	} else {
		if (priv->extclk == priv->clk) {
			devm_clk_put(&pdev->dev, priv->extclk);
			priv->extclk = ERR_PTR(-EINVAL);
		} else {
			dev_info(&pdev->dev, "found external clock\n");
			clk_prepare_enable(priv->extclk);
			soc_dai = &kirkwood_i2s_dai_extclk;
		}
	}

	/* Some sensible defaults - this reflects the powerup values */
	priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;

	/* Select the burst size */
	if (priv->burst == 32) {
		priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
		priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
	} else {
		priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
		priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
	}

	err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
					 soc_dai, 1);
	if (err) {
		dev_err(&pdev->dev, "snd_soc_register_component failed\n");
		goto err_component;
	}

	err = snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
	if (err) {
		dev_err(&pdev->dev, "snd_soc_register_platform failed\n");
		goto err_platform;
	}
	return 0;
 err_platform:
	snd_soc_unregister_component(&pdev->dev);
 err_component:
	if (!IS_ERR(priv->extclk))
		clk_disable_unprepare(priv->extclk);
	clk_disable_unprepare(priv->clk);

	return err;
}

static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
{
	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);

	snd_soc_unregister_platform(&pdev->dev);
	snd_soc_unregister_component(&pdev->dev);

	if (!IS_ERR(priv->extclk))
		clk_disable_unprepare(priv->extclk);
	clk_disable_unprepare(priv->clk);

	return 0;
}

#ifdef CONFIG_OF
static struct of_device_id mvebu_audio_of_match[] = {
	{ .compatible = "marvell,kirkwood-audio" },
	{ .compatible = "marvell,dove-audio" },
	{ }
};
MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
#endif

static struct platform_driver kirkwood_i2s_driver = {
	.probe  = kirkwood_i2s_dev_probe,
	.remove = kirkwood_i2s_dev_remove,
	.driver = {
		.name = DRV_NAME,
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(mvebu_audio_of_match),
	},
};

module_platform_driver(kirkwood_i2s_driver);

/* Module information */
MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mvebu-audio");
Commit	Line	Data
f9b95980	1	/*
	2	* kirkwood-i2s.c
	3	*
	4	* (c) 2010 Arnaud Patard <apatard@mandriva.com>
69737897	5	* (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
f9b95980	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <linux/module.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/io.h>
	17	#include <linux/slab.h>
	18	#include <linux/mbus.h>
	19	#include <linux/delay.h>
e919c716	20	#include <linux/clk.h>
f9b95980	21	#include <sound/pcm.h>
	22	#include <sound/pcm_params.h>
	23	#include <sound/soc.h>
c02cecb9	24	#include <linux/platform_data/asoc-kirkwood.h>
eb632318 JFM	25	#include <linux/of.h>
eb632318 JFM	26
f9b95980	27	#include "kirkwood.h"
f9b95980	28
64ddf1f8	29	#define DRV_NAME "mvebu-audio"
f9b95980	30
f9b95980	31	#define KIRKWOOD_I2S_FORMATS \
	32	(SNDRV_PCM_FMTBIT_S16_LE \| \
	33	SNDRV_PCM_FMTBIT_S24_LE \| \
	34	SNDRV_PCM_FMTBIT_S32_LE)
	35
f9b95980	36	static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
	37	unsigned int fmt)
	38	{
f0fba2ad	39	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
f9b95980	40	unsigned long mask;
	41	unsigned long value;
	42
	43	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	44	case SND_SOC_DAIFMT_RIGHT_J:
	45	mask = KIRKWOOD_I2S_CTL_RJ;
	46	break;
	47	case SND_SOC_DAIFMT_LEFT_J:
	48	mask = KIRKWOOD_I2S_CTL_LJ;
	49	break;
	50	case SND_SOC_DAIFMT_I2S:
	51	mask = KIRKWOOD_I2S_CTL_I2S;
	52	break;
	53	default:
	54	return -EINVAL;
	55	}
	56
	57	/*
	58	* Set same format for playback and record
	59	* This avoids some troubles.
	60	*/
	61	value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
	62	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	63	value \|= mask;
	64	writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
	65
	66	value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
	67	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	68	value \|= mask;
	69	writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
	70
	71	return 0;
	72	}
	73
	74	static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
	75	{
	76	unsigned long value;
	77
	78	value = KIRKWOOD_DCO_CTL_OFFSET_0;
	79	switch (rate) {
	80	default:
	81	case 44100:
	82	value \|= KIRKWOOD_DCO_CTL_FREQ_11;
	83	break;
	84	case 48000:
	85	value \|= KIRKWOOD_DCO_CTL_FREQ_12;
	86	break;
	87	case 96000:
	88	value \|= KIRKWOOD_DCO_CTL_FREQ_24;
	89	break;
	90	}
	91	writel(value, io + KIRKWOOD_DCO_CTL);
	92
	93	/* wait for dco locked */
	94	do {
	95	cpu_relax();
	96	value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
2424d458	97	value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
f9b95980	98	} while (value == 0);
	99	}
	100
363589bf RK	101	static void kirkwood_set_rate(struct snd_soc_dai *dai,
	102	struct kirkwood_dma_data *priv, unsigned long rate)
	103	{
	104	uint32_t clks_ctrl;
	105
1f1b6579	106	if (IS_ERR(priv->extclk)) {
8a537f85 JFM	107	/* use internal dco for the supported rates
8a537f85 JFM	108	* defined in kirkwood_i2s_dai */
363589bf RK	109	dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
	110	__func__, rate);
	111	kirkwood_set_dco(priv->io, rate);
	112
	113	clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
8a537f85 JFM	114	} else {
	115	/* use the external clock for the other rates
	116	* defined in kirkwood_i2s_dai_extclk */
363589bf RK	117	dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
	118	__func__, rate, 256 * rate);
	119	clk_set_rate(priv->extclk, 256 * rate);
	120
	121	clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
	122	}
	123	writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
	124	}
	125
f0fba2ad LG	126	static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
	127	struct snd_soc_dai *dai)
	128	{
	129	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	130
	131	snd_soc_dai_set_dma_data(dai, substream, priv);
	132	return 0;
	133	}
	134
f9b95980	135	static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
	136	struct snd_pcm_hw_params *params,
	137	struct snd_soc_dai *dai)
	138	{
f0fba2ad	139	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5 RK	140	uint32_t ctl_play, ctl_rec;
	141	unsigned int i2s_reg;
	142	unsigned long i2s_value;
f9b95980	143
	144	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	145	i2s_reg = KIRKWOOD_I2S_PLAYCTL;
f9b95980	146	} else {
f9b95980	147	i2s_reg = KIRKWOOD_I2S_RECCTL;
f9b95980	148	}
f9b95980	149
363589bf	150	kirkwood_set_rate(dai, priv, params_rate(params));
f9b95980	151
	152	i2s_value = readl(priv->io+i2s_reg);
	153	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
	154
f9b95980	155	/*
	156	* Size settings in play/rec i2s control regs and play/rec control
	157	* regs must be the same.
	158	*/
	159	switch (params_format(params)) {
	160	case SNDRV_PCM_FORMAT_S16_LE:
	161	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_16;
d8d11ba5 RK	162	ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C \|
	163	KIRKWOOD_PLAYCTL_I2S_EN;
	164	ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C \|
	165	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	166	break;
	167	/*
	168	* doesn't work... S20_3LE != kirkwood 20bit format ?
	169	*
	170	case SNDRV_PCM_FORMAT_S20_3LE:
	171	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_20;
d8d11ba5 RK	172	ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 \|
	173	KIRKWOOD_PLAYCTL_I2S_EN;
	174	ctl_rec = KIRKWOOD_RECCTL_SIZE_20 \|
	175	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	176	break;
	177	*/
	178	case SNDRV_PCM_FORMAT_S24_LE:
	179	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_24;
d8d11ba5 RK	180	ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 \|
	181	KIRKWOOD_PLAYCTL_I2S_EN;
	182	ctl_rec = KIRKWOOD_RECCTL_SIZE_24 \|
	183	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	184	break;
	185	case SNDRV_PCM_FORMAT_S32_LE:
	186	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_32;
d8d11ba5 RK	187	ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 \|
	188	KIRKWOOD_PLAYCTL_I2S_EN;
	189	ctl_rec = KIRKWOOD_RECCTL_SIZE_32 \|
	190	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	191	break;
	192	default:
	193	return -EINVAL;
	194	}
dfe4c936	195
dfe4c936	196	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dfe4c936	197	if (params_channels(params) == 1)
d8d11ba5	198	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_BOTH;
dfe4c936	199	else
d8d11ba5 RK	200	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_OFF;
	201
	202	priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK \|
db43b16f	203	KIRKWOOD_PLAYCTL_ENABLE_MASK \|
d8d11ba5 RK	204	KIRKWOOD_PLAYCTL_SIZE_MASK);
	205	priv->ctl_play \|= ctl_play;
	206	} else {
	207	priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
	208	priv->ctl_rec \|= ctl_rec;
dfe4c936	209	}
dfe4c936	210
f9b95980	211	writel(i2s_value, priv->io+i2s_reg);
f9b95980	212
	213	return 0;
	214	}
	215
	216	static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
	217	int cmd, struct snd_soc_dai *dai)
	218	{
f0fba2ad	219	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
982b604b RK	220	uint32_t ctl, value;
	221
	222	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	223	if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
	224	unsigned timeout = 5000;
	225	/*
	226	* The Armada510 spec says that if we enter pause mode, the
	227	* busy bit must be read back as clear _twice_. Make sure
	228	* we respect that otherwise we get DMA underruns.
	229	*/
	230	do {
	231	value = ctl;
	232	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	233	if (!((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
	234	break;
	235	udelay(1);
	236	} while (timeout--);
	237
	238	if ((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
	239	dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
	240	ctl);
	241	}
f9b95980	242
	243	switch (cmd) {
	244	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	245	/* configure */
d8d11ba5 RK	246	ctl = priv->ctl_play;
db43b16f	247	value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
d8d11ba5 RK	248	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	249
	250	/* enable interrupts */
f9b95980	251	value = readl(priv->io + KIRKWOOD_INT_MASK);
	252	value \|= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	253	writel(value, priv->io + KIRKWOOD_INT_MASK);
	254
d8d11ba5	255	/* enable playback */
982b604b	256	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	257	break;
	258
	259	case SNDRV_PCM_TRIGGER_STOP:
	260	/* stop audio, disable interrupts */
982b604b RK	261	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	262	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	263
	264	value = readl(priv->io + KIRKWOOD_INT_MASK);
	265	value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	266	writel(value, priv->io + KIRKWOOD_INT_MASK);
	267
	268	/* disable all playbacks */
db43b16f	269	ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
982b604b	270	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	271	break;
	272
	273	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	274	case SNDRV_PCM_TRIGGER_SUSPEND:
982b604b RK	275	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	276	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	277	break;
	278
	279	case SNDRV_PCM_TRIGGER_RESUME:
	280	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
982b604b RK	281	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE);
982b604b RK	282	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	283	break;
	284
	285	default:
	286	return -EINVAL;
	287	}
	288
	289	return 0;
	290	}
	291
	292	static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
	293	int cmd, struct snd_soc_dai *dai)
	294	{
f0fba2ad	295	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5	296	uint32_t ctl, value;
f9b95980	297
	298	value = readl(priv->io + KIRKWOOD_RECCTL);
	299
	300	switch (cmd) {
	301	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	302	/* configure */
	303	ctl = priv->ctl_rec;
	304	value = ctl & ~KIRKWOOD_RECCTL_I2S_EN;
	305	writel(value, priv->io + KIRKWOOD_RECCTL);
	306
	307	/* enable interrupts */
f9b95980	308	value = readl(priv->io + KIRKWOOD_INT_MASK);
	309	value \|= KIRKWOOD_INT_CAUSE_REC_BYTES;
	310	writel(value, priv->io + KIRKWOOD_INT_MASK);
	311
d8d11ba5 RK	312	/* enable record */
d8d11ba5 RK	313	writel(ctl, priv->io + KIRKWOOD_RECCTL);
f9b95980	314	break;
	315
	316	case SNDRV_PCM_TRIGGER_STOP:
	317	/* stop audio, disable interrupts */
	318	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	319	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	320	writel(value, priv->io + KIRKWOOD_RECCTL);
	321
	322	value = readl(priv->io + KIRKWOOD_INT_MASK);
	323	value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
	324	writel(value, priv->io + KIRKWOOD_INT_MASK);
	325
	326	/* disable all records */
	327	value = readl(priv->io + KIRKWOOD_RECCTL);
	328	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	329	writel(value, priv->io + KIRKWOOD_RECCTL);
	330	break;
	331
	332	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	333	case SNDRV_PCM_TRIGGER_SUSPEND:
	334	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	335	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	336	writel(value, priv->io + KIRKWOOD_RECCTL);
	337	break;
	338
	339	case SNDRV_PCM_TRIGGER_RESUME:
	340	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	341	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	342	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE);
f9b95980	343	writel(value, priv->io + KIRKWOOD_RECCTL);
	344	break;
	345
	346	default:
	347	return -EINVAL;
f9b95980	348	}
	349
	350	return 0;
	351	}
	352
	353	static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
	354	struct snd_soc_dai *dai)
	355	{
	356	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	357	return kirkwood_i2s_play_trigger(substream, cmd, dai);
	358	else
	359	return kirkwood_i2s_rec_trigger(substream, cmd, dai);
	360
	361	return 0;
	362	}
	363
f0fba2ad	364	static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
f9b95980	365	{
f0fba2ad	366	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
f9b95980	367	unsigned long value;
	368	unsigned int reg_data;
	369
	370	/* put system in a "safe" state : */
	371	/* disable audio interrupts */
	372	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	373	writel(0, priv->io + KIRKWOOD_INT_MASK);
	374
	375	reg_data = readl(priv->io + 0x1200);
	376	reg_data &= (~(0x333FF8));
	377	reg_data \|= 0x111D18;
	378	writel(reg_data, priv->io + 0x1200);
	379
	380	msleep(500);
	381
	382	reg_data = readl(priv->io + 0x1200);
	383	reg_data &= (~(0x333FF8));
	384	reg_data \|= 0x111D18;
	385	writel(reg_data, priv->io + 0x1200);
	386
	387	/* disable playback/record */
	388	value = readl(priv->io + KIRKWOOD_PLAYCTL);
db43b16f	389	value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
f9b95980	390	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	391
	392	value = readl(priv->io + KIRKWOOD_RECCTL);
	393	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	394	writel(value, priv->io + KIRKWOOD_RECCTL);
	395
	396	return 0;
	397
	398	}
	399
85e7652d	400	static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
f0fba2ad	401	.startup = kirkwood_i2s_startup,
f9b95980	402	.trigger = kirkwood_i2s_trigger,
	403	.hw_params = kirkwood_i2s_hw_params,
	404	.set_fmt = kirkwood_i2s_set_fmt,
	405	};
	406
	407
f0fba2ad	408	static struct snd_soc_dai_driver kirkwood_i2s_dai = {
f9b95980	409	.probe = kirkwood_i2s_probe,
f9b95980	410	.playback = {
	411	.channels_min = 1,
	412	.channels_max = 2,
9e12cbd9 MB	413	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	414	SNDRV_PCM_RATE_96000,
363589bf RK	415	.formats = KIRKWOOD_I2S_FORMATS,
363589bf RK	416	},
f9b95980	417	.capture = {
	418	.channels_min = 1,
	419	.channels_max = 2,
9e12cbd9 MB	420	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	421	SNDRV_PCM_RATE_96000,
363589bf RK	422	.formats = KIRKWOOD_I2S_FORMATS,
	423	},
	424	.ops = &kirkwood_i2s_dai_ops,
	425	};
	426
	427	static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk = {
	428	.probe = kirkwood_i2s_probe,
363589bf RK	429	.playback = {
	430	.channels_min = 1,
	431	.channels_max = 2,
	432	.rates = SNDRV_PCM_RATE_8000_192000 \|
	433	SNDRV_PCM_RATE_CONTINUOUS \|
	434	SNDRV_PCM_RATE_KNOT,
	435	.formats = KIRKWOOD_I2S_FORMATS,
	436	},
	437	.capture = {
	438	.channels_min = 1,
	439	.channels_max = 2,
	440	.rates = SNDRV_PCM_RATE_8000_192000 \|
	441	SNDRV_PCM_RATE_CONTINUOUS \|
	442	SNDRV_PCM_RATE_KNOT,
	443	.formats = KIRKWOOD_I2S_FORMATS,
	444	},
f9b95980	445	.ops = &kirkwood_i2s_dai_ops,
f9b95980	446	};
f9b95980	447
83d85f53 KM	448	static const struct snd_soc_component_driver kirkwood_i2s_component = {
	449	.name = DRV_NAME,
	450	};
	451
34e15fbd	452	static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
f9b95980	453	{
363589bf RK	454	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
363589bf RK	455	struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;
f0fba2ad	456	struct kirkwood_dma_data *priv;
363589bf	457	struct resource *mem;
eb632318	458	struct device_node *np = pdev->dev.of_node;
f9b95980	459	int err;
f9b95980	460
dbc517bf	461	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f9b95980	462	if (!priv) {
f9b95980	463	dev_err(&pdev->dev, "allocation failed\n");
dbc517bf	464	return -ENOMEM;
f9b95980	465	}
f0fba2ad	466	dev_set_drvdata(&pdev->dev, priv);
f9b95980	467
f9b95980	468	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
b25b5aa0 TR	469	priv->io = devm_ioremap_resource(&pdev->dev, mem);
	470	if (IS_ERR(priv->io))
	471	return PTR_ERR(priv->io);
f9b95980	472
	473	priv->irq = platform_get_irq(pdev, 0);
	474	if (priv->irq <= 0) {
	475	dev_err(&pdev->dev, "platform_get_irq failed\n");
dbc517bf	476	return -ENXIO;
f9b95980	477	}
f9b95980	478
eb632318 JFM	479	if (np) {
	480	priv->burst = 128; /* might be 32 or 128 */
	481	} else if (data) {
	482	priv->burst = data->burst;
	483	} else {
	484	dev_err(&pdev->dev, "no DT nor platform data ?!\n");
dbc517bf	485	return -EINVAL;
f9b95980	486	}
f9b95980	487
eb632318	488	priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
e919c716 AL	489	if (IS_ERR(priv->clk)) {
e919c716 AL	490	dev_err(&pdev->dev, "no clock\n");
dbc517bf	491	return PTR_ERR(priv->clk);
e919c716	492	}
dbc517bf RK	493
	494	err = clk_prepare_enable(priv->clk);
	495	if (err < 0)
	496	return err;
e919c716	497
4734dc96	498	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
84aac6c7 JFM	499	if (IS_ERR(priv->extclk)) {
	500	if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
	501	return -EPROBE_DEFER;
	502	} else {
d8d11ba5	503	if (priv->extclk == priv->clk) {
af64d734	504	devm_clk_put(&pdev->dev, priv->extclk);
d8d11ba5 RK	505	priv->extclk = ERR_PTR(-EINVAL);
	506	} else {
	507	dev_info(&pdev->dev, "found external clock\n");
	508	clk_prepare_enable(priv->extclk);
	509	soc_dai = &kirkwood_i2s_dai_extclk;
	510	}
	511	}
	512
	513	/* Some sensible defaults - this reflects the powerup values */
	514	priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
	515	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
	516
	517	/* Select the burst size */
eb632318	518	if (priv->burst == 32) {
d8d11ba5 RK	519	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_32;
	520	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_32;
	521	} else {
	522	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_128;
	523	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_128;
	524	}
	525
83d85f53 KM	526	err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
83d85f53 KM	527	soc_dai, 1);
64ddf1f8 RK	528	if (err) {
	529	dev_err(&pdev->dev, "snd_soc_register_component failed\n");
	530	goto err_component;
	531	}
baffab28	532
64ddf1f8 RK	533	err = snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
	534	if (err) {
	535	dev_err(&pdev->dev, "snd_soc_register_platform failed\n");
	536	goto err_platform;
	537	}
	538	return 0;
	539	err_platform:
	540	snd_soc_unregister_component(&pdev->dev);
	541	err_component:
4734dc96	542	if (!IS_ERR(priv->extclk))
363589bf	543	clk_disable_unprepare(priv->extclk);
baffab28	544	clk_disable_unprepare(priv->clk);
dbc517bf	545
f9b95980	546	return err;
	547	}
	548
34e15fbd	549	static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
f9b95980	550	{
f0fba2ad LG	551	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
f0fba2ad LG	552
64ddf1f8	553	snd_soc_unregister_platform(&pdev->dev);
83d85f53	554	snd_soc_unregister_component(&pdev->dev);
e919c716	555
4734dc96	556	if (!IS_ERR(priv->extclk))
363589bf	557	clk_disable_unprepare(priv->extclk);
e919c716	558	clk_disable_unprepare(priv->clk);
f0fba2ad	559
f9b95980	560	return 0;
	561	}
	562
eb632318 JFM	563	#ifdef CONFIG_OF
eb632318 JFM	564	static struct of_device_id mvebu_audio_of_match[] = {
d098b2f0 TP	565	{ .compatible = "marvell,kirkwood-audio" },
d098b2f0 TP	566	{ .compatible = "marvell,dove-audio" },
eb632318 JFM	567	{ }
	568	};
	569	MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
	570	#endif
	571
f9b95980	572	static struct platform_driver kirkwood_i2s_driver = {
f9b95980	573	.probe = kirkwood_i2s_dev_probe,
34e15fbd	574	.remove = kirkwood_i2s_dev_remove,
f9b95980	575	.driver = {
	576	.name = DRV_NAME,
	577	.owner = THIS_MODULE,
eb632318	578	.of_match_table = of_match_ptr(mvebu_audio_of_match),
f9b95980	579	},
	580	};
	581
41b10225	582	module_platform_driver(kirkwood_i2s_driver);
f9b95980	583
f9b95980	584	/* Module information */
69737897	585	MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
f9b95980	586	MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
f9b95980	587	MODULE_LICENSE("GPL");
64ddf1f8	588	MODULE_ALIAS("platform:mvebu-audio");