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