[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)

#define KIRKWOOD_SPDIF_FORMATS \
	(SNDRV_PCM_FMTBIT_S16_LE | \
	 SNDRV_PCM_FMTBIT_S24_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 |
			   KIRKWOOD_PLAYCTL_SPDIF_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
			  KIRKWOOD_RECCTL_I2S_EN |
			  KIRKWOOD_RECCTL_SPDIF_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 |
			   KIRKWOOD_PLAYCTL_SPDIF_EN;
		ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
			  KIRKWOOD_RECCTL_I2S_EN |
			  KIRKWOOD_RECCTL_SPDIF_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);
	}

	if (dai->id == 0)
		ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN;	/* i2s */
	else
		ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN;	/* spdif */

	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 |
				KIRKWOOD_PLAYCTL_SPDIF_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 |
				KIRKWOOD_PLAYCTL_SPDIF_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 |
				KIRKWOOD_PLAYCTL_SPDIF_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;
		if (dai->id == 0)
			ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN;	/* i2s */
		else
			ctl &= ~KIRKWOOD_RECCTL_I2S_EN;		/* spdif */

		value = ctl & ~(KIRKWOOD_RECCTL_I2S_EN |
				KIRKWOOD_RECCTL_SPDIF_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_init(struct kirkwood_dma_data *priv)
{
	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[2] = {
    {
	.name = "i2s",
	.id = 0,
	.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,
    },
    {
	.name = "spdif",
	.id = 1,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
				SNDRV_PCM_RATE_96000,
		.formats = KIRKWOOD_SPDIF_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
				SNDRV_PCM_RATE_96000,
		.formats = KIRKWOOD_SPDIF_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
    },
};

static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
    {
	.name = "i2s",
	.id = 0,
	.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,
    },
    {
	.name = "spdif",
	.id = 1,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000 |
			 SNDRV_PCM_RATE_CONTINUOUS |
			 SNDRV_PCM_RATE_KNOT,
		.formats = KIRKWOOD_SPDIF_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000 |
			 SNDRV_PCM_RATE_CONTINUOUS |
			 SNDRV_PCM_RATE_KNOT,
		.formats = KIRKWOOD_SPDIF_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, 2);
	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;
	}

	kirkwood_i2s_init(priv);

	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
1c195ddb JFM	36	#define KIRKWOOD_SPDIF_FORMATS \
	37	(SNDRV_PCM_FMTBIT_S16_LE \| \
	38	SNDRV_PCM_FMTBIT_S24_LE)
	39
f9b95980	40	static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
	41	unsigned int fmt)
	42	{
f0fba2ad	43	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
f9b95980	44	unsigned long mask;
	45	unsigned long value;
	46
	47	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	48	case SND_SOC_DAIFMT_RIGHT_J:
	49	mask = KIRKWOOD_I2S_CTL_RJ;
	50	break;
	51	case SND_SOC_DAIFMT_LEFT_J:
	52	mask = KIRKWOOD_I2S_CTL_LJ;
	53	break;
	54	case SND_SOC_DAIFMT_I2S:
	55	mask = KIRKWOOD_I2S_CTL_I2S;
	56	break;
	57	default:
	58	return -EINVAL;
	59	}
	60
	61	/*
	62	* Set same format for playback and record
	63	* This avoids some troubles.
	64	*/
	65	value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
	66	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	67	value \|= mask;
	68	writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
	69
	70	value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
	71	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	72	value \|= mask;
	73	writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
	74
	75	return 0;
	76	}
	77
	78	static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
	79	{
	80	unsigned long value;
	81
	82	value = KIRKWOOD_DCO_CTL_OFFSET_0;
	83	switch (rate) {
	84	default:
	85	case 44100:
	86	value \|= KIRKWOOD_DCO_CTL_FREQ_11;
	87	break;
	88	case 48000:
	89	value \|= KIRKWOOD_DCO_CTL_FREQ_12;
	90	break;
	91	case 96000:
	92	value \|= KIRKWOOD_DCO_CTL_FREQ_24;
	93	break;
	94	}
	95	writel(value, io + KIRKWOOD_DCO_CTL);
	96
	97	/* wait for dco locked */
	98	do {
	99	cpu_relax();
	100	value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
2424d458	101	value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
f9b95980	102	} while (value == 0);
	103	}
	104
363589bf RK	105	static void kirkwood_set_rate(struct snd_soc_dai *dai,
	106	struct kirkwood_dma_data *priv, unsigned long rate)
	107	{
	108	uint32_t clks_ctrl;
	109
1f1b6579	110	if (IS_ERR(priv->extclk)) {
8a537f85 JFM	111	/* use internal dco for the supported rates
8a537f85 JFM	112	* defined in kirkwood_i2s_dai */
363589bf RK	113	dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
	114	__func__, rate);
	115	kirkwood_set_dco(priv->io, rate);
	116
	117	clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
8a537f85 JFM	118	} else {
	119	/* use the external clock for the other rates
	120	* defined in kirkwood_i2s_dai_extclk */
363589bf RK	121	dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
	122	__func__, rate, 256 * rate);
	123	clk_set_rate(priv->extclk, 256 * rate);
	124
	125	clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
	126	}
	127	writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
	128	}
	129
f0fba2ad LG	130	static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
	131	struct snd_soc_dai *dai)
	132	{
	133	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	134
	135	snd_soc_dai_set_dma_data(dai, substream, priv);
	136	return 0;
	137	}
	138
f9b95980	139	static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
	140	struct snd_pcm_hw_params *params,
	141	struct snd_soc_dai *dai)
	142	{
f0fba2ad	143	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5 RK	144	uint32_t ctl_play, ctl_rec;
	145	unsigned int i2s_reg;
	146	unsigned long i2s_value;
f9b95980	147
	148	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	149	i2s_reg = KIRKWOOD_I2S_PLAYCTL;
f9b95980	150	} else {
f9b95980	151	i2s_reg = KIRKWOOD_I2S_RECCTL;
f9b95980	152	}
f9b95980	153
363589bf	154	kirkwood_set_rate(dai, priv, params_rate(params));
f9b95980	155
	156	i2s_value = readl(priv->io+i2s_reg);
	157	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
	158
f9b95980	159	/*
	160	* Size settings in play/rec i2s control regs and play/rec control
	161	* regs must be the same.
	162	*/
	163	switch (params_format(params)) {
	164	case SNDRV_PCM_FORMAT_S16_LE:
	165	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_16;
d8d11ba5	166	ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C \|
75b9b65e JFM	167	KIRKWOOD_PLAYCTL_I2S_EN \|
75b9b65e JFM	168	KIRKWOOD_PLAYCTL_SPDIF_EN;
d8d11ba5	169	ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C \|
75b9b65e JFM	170	KIRKWOOD_RECCTL_I2S_EN \|
75b9b65e JFM	171	KIRKWOOD_RECCTL_SPDIF_EN;
f9b95980	172	break;
	173	/*
	174	* doesn't work... S20_3LE != kirkwood 20bit format ?
	175	*
	176	case SNDRV_PCM_FORMAT_S20_3LE:
	177	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_20;
d8d11ba5 RK	178	ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 \|
	179	KIRKWOOD_PLAYCTL_I2S_EN;
	180	ctl_rec = KIRKWOOD_RECCTL_SIZE_20 \|
	181	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	182	break;
	183	*/
	184	case SNDRV_PCM_FORMAT_S24_LE:
	185	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_24;
d8d11ba5	186	ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 \|
75b9b65e JFM	187	KIRKWOOD_PLAYCTL_I2S_EN \|
75b9b65e JFM	188	KIRKWOOD_PLAYCTL_SPDIF_EN;
d8d11ba5	189	ctl_rec = KIRKWOOD_RECCTL_SIZE_24 \|
75b9b65e JFM	190	KIRKWOOD_RECCTL_I2S_EN \|
75b9b65e JFM	191	KIRKWOOD_RECCTL_SPDIF_EN;
f9b95980	192	break;
	193	case SNDRV_PCM_FORMAT_S32_LE:
	194	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_32;
d8d11ba5 RK	195	ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 \|
	196	KIRKWOOD_PLAYCTL_I2S_EN;
	197	ctl_rec = KIRKWOOD_RECCTL_SIZE_32 \|
	198	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	199	break;
	200	default:
	201	return -EINVAL;
	202	}
dfe4c936	203
dfe4c936	204	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dfe4c936	205	if (params_channels(params) == 1)
d8d11ba5	206	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_BOTH;
dfe4c936	207	else
d8d11ba5 RK	208	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_OFF;
	209
	210	priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK \|
db43b16f	211	KIRKWOOD_PLAYCTL_ENABLE_MASK \|
d8d11ba5 RK	212	KIRKWOOD_PLAYCTL_SIZE_MASK);
	213	priv->ctl_play \|= ctl_play;
	214	} else {
	215	priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
	216	priv->ctl_rec \|= ctl_rec;
dfe4c936	217	}
dfe4c936	218
f9b95980	219	writel(i2s_value, priv->io+i2s_reg);
f9b95980	220
	221	return 0;
	222	}
	223
	224	static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
	225	int cmd, struct snd_soc_dai *dai)
	226	{
f0fba2ad	227	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
982b604b RK	228	uint32_t ctl, value;
	229
	230	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	231	if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
	232	unsigned timeout = 5000;
	233	/*
	234	* The Armada510 spec says that if we enter pause mode, the
	235	* busy bit must be read back as clear _twice_. Make sure
	236	* we respect that otherwise we get DMA underruns.
	237	*/
	238	do {
	239	value = ctl;
	240	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	241	if (!((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
	242	break;
	243	udelay(1);
	244	} while (timeout--);
	245
	246	if ((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
	247	dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
	248	ctl);
	249	}
f9b95980	250
75b9b65e JFM	251	if (dai->id == 0)
	252	ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
	253	else
	254	ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
	255
f9b95980	256	switch (cmd) {
f9b95980	257	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	258	/* configure */
d8d11ba5 RK	259	ctl = priv->ctl_play;
db43b16f	260	value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
d8d11ba5 RK	261	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	262
	263	/* enable interrupts */
f9b95980	264	value = readl(priv->io + KIRKWOOD_INT_MASK);
	265	value \|= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	266	writel(value, priv->io + KIRKWOOD_INT_MASK);
	267
d8d11ba5	268	/* enable playback */
982b604b	269	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	270	break;
	271
	272	case SNDRV_PCM_TRIGGER_STOP:
	273	/* stop audio, disable interrupts */
75b9b65e JFM	274	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE \|
75b9b65e JFM	275	KIRKWOOD_PLAYCTL_SPDIF_MUTE;
982b604b	276	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	277
	278	value = readl(priv->io + KIRKWOOD_INT_MASK);
	279	value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	280	writel(value, priv->io + KIRKWOOD_INT_MASK);
	281
	282	/* disable all playbacks */
db43b16f	283	ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
982b604b	284	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	285	break;
	286
	287	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	288	case SNDRV_PCM_TRIGGER_SUSPEND:
75b9b65e JFM	289	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE \|
75b9b65e JFM	290	KIRKWOOD_PLAYCTL_SPDIF_MUTE;
982b604b	291	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	292	break;
	293
	294	case SNDRV_PCM_TRIGGER_RESUME:
	295	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
75b9b65e JFM	296	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE \|
75b9b65e JFM	297	KIRKWOOD_PLAYCTL_SPDIF_MUTE);
982b604b	298	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	299	break;
	300
	301	default:
	302	return -EINVAL;
	303	}
	304
	305	return 0;
	306	}
	307
	308	static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
	309	int cmd, struct snd_soc_dai *dai)
	310	{
f0fba2ad	311	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5	312	uint32_t ctl, value;
f9b95980	313
	314	value = readl(priv->io + KIRKWOOD_RECCTL);
	315
	316	switch (cmd) {
	317	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	318	/* configure */
d8d11ba5 RK	319	ctl = priv->ctl_rec;
75b9b65e JFM	320	if (dai->id == 0)
	321	ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
	322	else
	323	ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
	324
	325	value = ctl & ~(KIRKWOOD_RECCTL_I2S_EN \|
	326	KIRKWOOD_RECCTL_SPDIF_EN);
d8d11ba5 RK	327	writel(value, priv->io + KIRKWOOD_RECCTL);
	328
	329	/* enable interrupts */
f9b95980	330	value = readl(priv->io + KIRKWOOD_INT_MASK);
	331	value \|= KIRKWOOD_INT_CAUSE_REC_BYTES;
	332	writel(value, priv->io + KIRKWOOD_INT_MASK);
	333
d8d11ba5 RK	334	/* enable record */
d8d11ba5 RK	335	writel(ctl, priv->io + KIRKWOOD_RECCTL);
f9b95980	336	break;
	337
	338	case SNDRV_PCM_TRIGGER_STOP:
	339	/* stop audio, disable interrupts */
	340	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	341	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	342	writel(value, priv->io + KIRKWOOD_RECCTL);
	343
	344	value = readl(priv->io + KIRKWOOD_INT_MASK);
	345	value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
	346	writel(value, priv->io + KIRKWOOD_INT_MASK);
	347
	348	/* disable all records */
	349	value = readl(priv->io + KIRKWOOD_RECCTL);
	350	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	351	writel(value, priv->io + KIRKWOOD_RECCTL);
	352	break;
	353
	354	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	355	case SNDRV_PCM_TRIGGER_SUSPEND:
	356	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	357	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	358	writel(value, priv->io + KIRKWOOD_RECCTL);
	359	break;
	360
	361	case SNDRV_PCM_TRIGGER_RESUME:
	362	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	363	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	364	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE);
f9b95980	365	writel(value, priv->io + KIRKWOOD_RECCTL);
	366	break;
	367
	368	default:
	369	return -EINVAL;
f9b95980	370	}
	371
	372	return 0;
	373	}
	374
	375	static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
	376	struct snd_soc_dai *dai)
	377	{
	378	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	379	return kirkwood_i2s_play_trigger(substream, cmd, dai);
	380	else
	381	return kirkwood_i2s_rec_trigger(substream, cmd, dai);
	382
	383	return 0;
	384	}
	385
75b9b65e	386	static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
f9b95980	387	{
	388	unsigned long value;
	389	unsigned int reg_data;
	390
	391	/* put system in a "safe" state : */
	392	/* disable audio interrupts */
	393	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	394	writel(0, priv->io + KIRKWOOD_INT_MASK);
	395
	396	reg_data = readl(priv->io + 0x1200);
	397	reg_data &= (~(0x333FF8));
	398	reg_data \|= 0x111D18;
	399	writel(reg_data, priv->io + 0x1200);
	400
	401	msleep(500);
	402
	403	reg_data = readl(priv->io + 0x1200);
	404	reg_data &= (~(0x333FF8));
	405	reg_data \|= 0x111D18;
	406	writel(reg_data, priv->io + 0x1200);
	407
	408	/* disable playback/record */
	409	value = readl(priv->io + KIRKWOOD_PLAYCTL);
db43b16f	410	value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
f9b95980	411	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	412
	413	value = readl(priv->io + KIRKWOOD_RECCTL);
	414	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	415	writel(value, priv->io + KIRKWOOD_RECCTL);
	416
	417	return 0;
	418
	419	}
	420
85e7652d	421	static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
f0fba2ad	422	.startup = kirkwood_i2s_startup,
f9b95980	423	.trigger = kirkwood_i2s_trigger,
	424	.hw_params = kirkwood_i2s_hw_params,
	425	.set_fmt = kirkwood_i2s_set_fmt,
	426	};
	427
75b9b65e JFM	428	static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
	429	{
	430	.name = "i2s",
	431	.id = 0,
	432	.playback = {
	433	.channels_min = 1,
	434	.channels_max = 2,
	435	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
	436	SNDRV_PCM_RATE_96000,
	437	.formats = KIRKWOOD_I2S_FORMATS,
	438	},
	439	.capture = {
	440	.channels_min = 1,
	441	.channels_max = 2,
	442	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
	443	SNDRV_PCM_RATE_96000,
	444	.formats = KIRKWOOD_I2S_FORMATS,
	445	},
	446	.ops = &kirkwood_i2s_dai_ops,
	447	},
	448	{
	449	.name = "spdif",
	450	.id = 1,
f9b95980	451	.playback = {
	452	.channels_min = 1,
	453	.channels_max = 2,
9e12cbd9 MB	454	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	455	SNDRV_PCM_RATE_96000,
1c195ddb	456	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf	457	},
f9b95980	458	.capture = {
	459	.channels_min = 1,
	460	.channels_max = 2,
9e12cbd9 MB	461	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	462	SNDRV_PCM_RATE_96000,
1c195ddb	463	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf RK	464	},
363589bf RK	465	.ops = &kirkwood_i2s_dai_ops,
75b9b65e	466	},
363589bf RK	467	};
363589bf RK	468
75b9b65e JFM	469	static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
	470	{
	471	.name = "i2s",
	472	.id = 0,
	473	.playback = {
	474	.channels_min = 1,
	475	.channels_max = 2,
	476	.rates = SNDRV_PCM_RATE_8000_192000 \|
	477	SNDRV_PCM_RATE_CONTINUOUS \|
	478	SNDRV_PCM_RATE_KNOT,
	479	.formats = KIRKWOOD_I2S_FORMATS,
	480	},
	481	.capture = {
	482	.channels_min = 1,
	483	.channels_max = 2,
	484	.rates = SNDRV_PCM_RATE_8000_192000 \|
	485	SNDRV_PCM_RATE_CONTINUOUS \|
	486	SNDRV_PCM_RATE_KNOT,
	487	.formats = KIRKWOOD_I2S_FORMATS,
	488	},
	489	.ops = &kirkwood_i2s_dai_ops,
	490	},
	491	{
	492	.name = "spdif",
	493	.id = 1,
363589bf RK	494	.playback = {
	495	.channels_min = 1,
	496	.channels_max = 2,
	497	.rates = SNDRV_PCM_RATE_8000_192000 \|
	498	SNDRV_PCM_RATE_CONTINUOUS \|
	499	SNDRV_PCM_RATE_KNOT,
1c195ddb	500	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf RK	501	},
	502	.capture = {
	503	.channels_min = 1,
	504	.channels_max = 2,
	505	.rates = SNDRV_PCM_RATE_8000_192000 \|
	506	SNDRV_PCM_RATE_CONTINUOUS \|
	507	SNDRV_PCM_RATE_KNOT,
1c195ddb	508	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf	509	},
f9b95980	510	.ops = &kirkwood_i2s_dai_ops,
75b9b65e	511	},
f9b95980	512	};
f9b95980	513
83d85f53 KM	514	static const struct snd_soc_component_driver kirkwood_i2s_component = {
	515	.name = DRV_NAME,
	516	};
	517
34e15fbd	518	static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
f9b95980	519	{
363589bf	520	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
75b9b65e	521	struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai;
f0fba2ad	522	struct kirkwood_dma_data *priv;
363589bf	523	struct resource *mem;
eb632318	524	struct device_node *np = pdev->dev.of_node;
f9b95980	525	int err;
f9b95980	526
dbc517bf	527	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f9b95980	528	if (!priv) {
f9b95980	529	dev_err(&pdev->dev, "allocation failed\n");
dbc517bf	530	return -ENOMEM;
f9b95980	531	}
f0fba2ad	532	dev_set_drvdata(&pdev->dev, priv);
f9b95980	533
f9b95980	534	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
b25b5aa0 TR	535	priv->io = devm_ioremap_resource(&pdev->dev, mem);
	536	if (IS_ERR(priv->io))
	537	return PTR_ERR(priv->io);
f9b95980	538
	539	priv->irq = platform_get_irq(pdev, 0);
	540	if (priv->irq <= 0) {
	541	dev_err(&pdev->dev, "platform_get_irq failed\n");
dbc517bf	542	return -ENXIO;
f9b95980	543	}
f9b95980	544
eb632318 JFM	545	if (np) {
	546	priv->burst = 128; /* might be 32 or 128 */
	547	} else if (data) {
	548	priv->burst = data->burst;
	549	} else {
	550	dev_err(&pdev->dev, "no DT nor platform data ?!\n");
dbc517bf	551	return -EINVAL;
f9b95980	552	}
f9b95980	553
eb632318	554	priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
e919c716 AL	555	if (IS_ERR(priv->clk)) {
e919c716 AL	556	dev_err(&pdev->dev, "no clock\n");
dbc517bf	557	return PTR_ERR(priv->clk);
e919c716	558	}
dbc517bf RK	559
	560	err = clk_prepare_enable(priv->clk);
	561	if (err < 0)
	562	return err;
e919c716	563
4734dc96	564	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
84aac6c7 JFM	565	if (IS_ERR(priv->extclk)) {
	566	if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
	567	return -EPROBE_DEFER;
	568	} else {
d8d11ba5	569	if (priv->extclk == priv->clk) {
af64d734	570	devm_clk_put(&pdev->dev, priv->extclk);
d8d11ba5 RK	571	priv->extclk = ERR_PTR(-EINVAL);
	572	} else {
	573	dev_info(&pdev->dev, "found external clock\n");
	574	clk_prepare_enable(priv->extclk);
99d8d3ba	575	soc_dai = kirkwood_i2s_dai_extclk;
d8d11ba5 RK	576	}
	577	}
	578
	579	/* Some sensible defaults - this reflects the powerup values */
	580	priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
	581	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
	582
	583	/* Select the burst size */
eb632318	584	if (priv->burst == 32) {
d8d11ba5 RK	585	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_32;
	586	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_32;
	587	} else {
	588	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_128;
	589	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_128;
	590	}
	591
83d85f53	592	err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
75b9b65e	593	soc_dai, 2);
64ddf1f8 RK	594	if (err) {
	595	dev_err(&pdev->dev, "snd_soc_register_component failed\n");
	596	goto err_component;
	597	}
baffab28	598
64ddf1f8 RK	599	err = snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
	600	if (err) {
	601	dev_err(&pdev->dev, "snd_soc_register_platform failed\n");
	602	goto err_platform;
	603	}
75b9b65e JFM	604
	605	kirkwood_i2s_init(priv);
	606
64ddf1f8 RK	607	return 0;
	608	err_platform:
	609	snd_soc_unregister_component(&pdev->dev);
	610	err_component:
4734dc96	611	if (!IS_ERR(priv->extclk))
363589bf	612	clk_disable_unprepare(priv->extclk);
baffab28	613	clk_disable_unprepare(priv->clk);
dbc517bf	614
f9b95980	615	return err;
	616	}
	617
34e15fbd	618	static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
f9b95980	619	{
f0fba2ad LG	620	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
f0fba2ad LG	621
64ddf1f8	622	snd_soc_unregister_platform(&pdev->dev);
83d85f53	623	snd_soc_unregister_component(&pdev->dev);
e919c716	624
4734dc96	625	if (!IS_ERR(priv->extclk))
363589bf	626	clk_disable_unprepare(priv->extclk);
e919c716	627	clk_disable_unprepare(priv->clk);
f0fba2ad	628
f9b95980	629	return 0;
	630	}
	631
eb632318 JFM	632	#ifdef CONFIG_OF
eb632318 JFM	633	static struct of_device_id mvebu_audio_of_match[] = {
d098b2f0 TP	634	{ .compatible = "marvell,kirkwood-audio" },
d098b2f0 TP	635	{ .compatible = "marvell,dove-audio" },
eb632318 JFM	636	{ }
	637	};
	638	MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
	639	#endif
	640
f9b95980	641	static struct platform_driver kirkwood_i2s_driver = {
f9b95980	642	.probe = kirkwood_i2s_dev_probe,
34e15fbd	643	.remove = kirkwood_i2s_dev_remove,
f9b95980	644	.driver = {
	645	.name = DRV_NAME,
	646	.owner = THIS_MODULE,
eb632318	647	.of_match_table = of_match_ptr(mvebu_audio_of_match),
f9b95980	648	},
	649	};
	650
41b10225	651	module_platform_driver(kirkwood_i2s_driver);
f9b95980	652
f9b95980	653	/* Module information */
69737897	654	MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
f9b95980	655	MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
f9b95980	656	MODULE_LICENSE("GPL");
64ddf1f8	657	MODULE_ALIAS("platform:mvebu-audio");