[linux-block.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 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_ENABLE_MASK |
				   KIRKWOOD_RECCTL_SIZE_MASK);
		priv->ctl_rec |= ctl_rec;
	}

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

	return 0;
}

static unsigned kirkwood_i2s_play_mute(unsigned ctl)
{
	if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
		ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE;
	if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
		ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
	return ctl;
}

static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
				int cmd, struct snd_soc_dai *dai)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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_ENABLE_MASK) == 0) {
		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;
		if (dai->id == 0)
			ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN;	/* i2s */
		else
			ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN;	/* spdif */
		ctl = kirkwood_i2s_play_mute(ctl);
		value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
		writel(value, priv->io + KIRKWOOD_PLAYCTL);

		/* enable interrupts */
		if (!runtime->no_period_wakeup) {
			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);
		ctl = kirkwood_i2s_play_mute(ctl);
		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_ENABLE_MASK;
		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_ENABLE_MASK;
		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_ENABLE_MASK;
	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_CONTINUOUS,
		.rate_min = 5512,
		.rate_max = 192000,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 5512,
		.rate_max = 192000,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
    },
    {
	.name = "spdif",
	.id = 1,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 5512,
		.rate_max = 192000,
		.formats = KIRKWOOD_SPDIF_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 5512,
		.rate_max = 192000,
		.formats = KIRKWOOD_SPDIF_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
    },
};

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)
		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: %d\n", priv->irq);
		return priv->irq;
	}

	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 (clk_is_match(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 = devm_snd_soc_register_component(&pdev->dev, &kirkwood_soc_component,
					 soc_dai, 2);
	if (err) {
		dev_err(&pdev->dev, "snd_soc_register_component failed\n");
		goto err_component;
	}

	kirkwood_i2s_init(priv);

	return 0;

 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);

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

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id mvebu_audio_of_match[] = {
	{ .compatible = "marvell,kirkwood-audio" },
	{ .compatible = "marvell,dove-audio" },
	{ .compatible = "marvell,armada370-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,
		.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
f9b95980	29	#define KIRKWOOD_I2S_FORMATS \
	30	(SNDRV_PCM_FMTBIT_S16_LE \| \
	31	SNDRV_PCM_FMTBIT_S24_LE \| \
	32	SNDRV_PCM_FMTBIT_S32_LE)
	33
1c195ddb JFM	34	#define KIRKWOOD_SPDIF_FORMATS \
	35	(SNDRV_PCM_FMTBIT_S16_LE \| \
	36	SNDRV_PCM_FMTBIT_S24_LE)
	37
f9b95980	38	static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
	39	unsigned int fmt)
	40	{
f0fba2ad	41	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
f9b95980	42	unsigned long mask;
	43	unsigned long value;
	44
	45	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	46	case SND_SOC_DAIFMT_RIGHT_J:
	47	mask = KIRKWOOD_I2S_CTL_RJ;
	48	break;
	49	case SND_SOC_DAIFMT_LEFT_J:
	50	mask = KIRKWOOD_I2S_CTL_LJ;
	51	break;
	52	case SND_SOC_DAIFMT_I2S:
	53	mask = KIRKWOOD_I2S_CTL_I2S;
	54	break;
	55	default:
	56	return -EINVAL;
	57	}
	58
	59	/*
	60	* Set same format for playback and record
	61	* This avoids some troubles.
	62	*/
	63	value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
	64	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	65	value \|= mask;
	66	writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
	67
	68	value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
	69	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	70	value \|= mask;
	71	writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
	72
	73	return 0;
	74	}
	75
	76	static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
	77	{
	78	unsigned long value;
	79
	80	value = KIRKWOOD_DCO_CTL_OFFSET_0;
	81	switch (rate) {
	82	default:
	83	case 44100:
	84	value \|= KIRKWOOD_DCO_CTL_FREQ_11;
	85	break;
	86	case 48000:
	87	value \|= KIRKWOOD_DCO_CTL_FREQ_12;
	88	break;
	89	case 96000:
	90	value \|= KIRKWOOD_DCO_CTL_FREQ_24;
	91	break;
	92	}
	93	writel(value, io + KIRKWOOD_DCO_CTL);
	94
	95	/* wait for dco locked */
	96	do {
	97	cpu_relax();
	98	value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
2424d458	99	value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
f9b95980	100	} while (value == 0);
	101	}
	102
363589bf RK	103	static void kirkwood_set_rate(struct snd_soc_dai *dai,
	104	struct kirkwood_dma_data *priv, unsigned long rate)
	105	{
	106	uint32_t clks_ctrl;
	107
1f1b6579	108	if (IS_ERR(priv->extclk)) {
8a537f85 JFM	109	/* use internal dco for the supported rates
8a537f85 JFM	110	* defined in kirkwood_i2s_dai */
363589bf RK	111	dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
	112	__func__, rate);
	113	kirkwood_set_dco(priv->io, rate);
	114
	115	clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
8a537f85 JFM	116	} else {
	117	/* use the external clock for the other rates
	118	* defined in kirkwood_i2s_dai_extclk */
363589bf RK	119	dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
	120	__func__, rate, 256 * rate);
	121	clk_set_rate(priv->extclk, 256 * rate);
	122
	123	clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
	124	}
	125	writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
	126	}
	127
f0fba2ad LG	128	static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
	129	struct snd_soc_dai *dai)
	130	{
	131	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	132
	133	snd_soc_dai_set_dma_data(dai, substream, priv);
	134	return 0;
	135	}
	136
f9b95980	137	static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
	138	struct snd_pcm_hw_params *params,
	139	struct snd_soc_dai *dai)
	140	{
f0fba2ad	141	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5 RK	142	uint32_t ctl_play, ctl_rec;
	143	unsigned int i2s_reg;
	144	unsigned long i2s_value;
f9b95980	145
	146	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	147	i2s_reg = KIRKWOOD_I2S_PLAYCTL;
f9b95980	148	} else {
f9b95980	149	i2s_reg = KIRKWOOD_I2S_RECCTL;
f9b95980	150	}
f9b95980	151
363589bf	152	kirkwood_set_rate(dai, priv, params_rate(params));
f9b95980	153
	154	i2s_value = readl(priv->io+i2s_reg);
	155	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
	156
f9b95980	157	/*
	158	* Size settings in play/rec i2s control regs and play/rec control
	159	* regs must be the same.
	160	*/
	161	switch (params_format(params)) {
	162	case SNDRV_PCM_FORMAT_S16_LE:
	163	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_16;
d8d11ba5	164	ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C \|
75b9b65e JFM	165	KIRKWOOD_PLAYCTL_I2S_EN \|
75b9b65e JFM	166	KIRKWOOD_PLAYCTL_SPDIF_EN;
d8d11ba5	167	ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C \|
75b9b65e JFM	168	KIRKWOOD_RECCTL_I2S_EN \|
75b9b65e JFM	169	KIRKWOOD_RECCTL_SPDIF_EN;
f9b95980	170	break;
	171	/*
	172	* doesn't work... S20_3LE != kirkwood 20bit format ?
	173	*
	174	case SNDRV_PCM_FORMAT_S20_3LE:
	175	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_20;
d8d11ba5 RK	176	ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 \|
	177	KIRKWOOD_PLAYCTL_I2S_EN;
	178	ctl_rec = KIRKWOOD_RECCTL_SIZE_20 \|
	179	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	180	break;
	181	*/
	182	case SNDRV_PCM_FORMAT_S24_LE:
	183	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_24;
d8d11ba5	184	ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 \|
75b9b65e JFM	185	KIRKWOOD_PLAYCTL_I2S_EN \|
75b9b65e JFM	186	KIRKWOOD_PLAYCTL_SPDIF_EN;
d8d11ba5	187	ctl_rec = KIRKWOOD_RECCTL_SIZE_24 \|
75b9b65e JFM	188	KIRKWOOD_RECCTL_I2S_EN \|
75b9b65e JFM	189	KIRKWOOD_RECCTL_SPDIF_EN;
f9b95980	190	break;
	191	case SNDRV_PCM_FORMAT_S32_LE:
	192	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_32;
d8d11ba5 RK	193	ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 \|
	194	KIRKWOOD_PLAYCTL_I2S_EN;
	195	ctl_rec = KIRKWOOD_RECCTL_SIZE_32 \|
	196	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	197	break;
	198	default:
	199	return -EINVAL;
	200	}
dfe4c936	201
dfe4c936	202	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dfe4c936	203	if (params_channels(params) == 1)
d8d11ba5	204	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_BOTH;
dfe4c936	205	else
d8d11ba5 RK	206	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_OFF;
	207
	208	priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK \|
db43b16f	209	KIRKWOOD_PLAYCTL_ENABLE_MASK \|
d8d11ba5 RK	210	KIRKWOOD_PLAYCTL_SIZE_MASK);
	211	priv->ctl_play \|= ctl_play;
	212	} else {
67721906 RK	213	priv->ctl_rec &= ~(KIRKWOOD_RECCTL_ENABLE_MASK \|
67721906 RK	214	KIRKWOOD_RECCTL_SIZE_MASK);
d8d11ba5	215	priv->ctl_rec \|= ctl_rec;
dfe4c936	216	}
dfe4c936	217
f9b95980	218	writel(i2s_value, priv->io+i2s_reg);
f9b95980	219
	220	return 0;
	221	}
	222
2fbc3821 RK	223	static unsigned kirkwood_i2s_play_mute(unsigned ctl)
	224	{
	225	if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
	226	ctl \|= KIRKWOOD_PLAYCTL_I2S_MUTE;
	227	if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
	228	ctl \|= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
	229	return ctl;
	230	}
	231
f9b95980	232	static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
	233	int cmd, struct snd_soc_dai *dai)
	234	{
920ec4e5	235	struct snd_pcm_runtime *runtime = substream->runtime;
f0fba2ad	236	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
982b604b RK	237	uint32_t ctl, value;
	238
	239	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
4d2097e5	240	if ((ctl & KIRKWOOD_PLAYCTL_ENABLE_MASK) == 0) {
982b604b RK	241	unsigned timeout = 5000;
	242	/*
	243	* The Armada510 spec says that if we enter pause mode, the
	244	* busy bit must be read back as clear _twice_. Make sure
	245	* we respect that otherwise we get DMA underruns.
	246	*/
	247	do {
	248	value = ctl;
	249	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	250	if (!((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
	251	break;
	252	udelay(1);
	253	} while (timeout--);
	254
	255	if ((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
	256	dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
	257	ctl);
	258	}
f9b95980	259
	260	switch (cmd) {
	261	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	262	/* configure */
d8d11ba5 RK	263	ctl = priv->ctl_play;
4f6f1478 JFM	264	if (dai->id == 0)
	265	ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
	266	else
	267	ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
2fbc3821	268	ctl = kirkwood_i2s_play_mute(ctl);
db43b16f	269	value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
d8d11ba5 RK	270	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	271
	272	/* enable interrupts */
920ec4e5 RK	273	if (!runtime->no_period_wakeup) {
	274	value = readl(priv->io + KIRKWOOD_INT_MASK);
	275	value \|= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	276	writel(value, priv->io + KIRKWOOD_INT_MASK);
	277	}
f9b95980	278
d8d11ba5	279	/* enable playback */
982b604b	280	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	281	break;
	282
	283	case SNDRV_PCM_TRIGGER_STOP:
	284	/* stop audio, disable interrupts */
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
	289	value = readl(priv->io + KIRKWOOD_INT_MASK);
	290	value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	291	writel(value, priv->io + KIRKWOOD_INT_MASK);
	292
	293	/* disable all playbacks */
db43b16f	294	ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
982b604b	295	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	296	break;
	297
	298	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	299	case SNDRV_PCM_TRIGGER_SUSPEND:
75b9b65e JFM	300	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE \|
75b9b65e JFM	301	KIRKWOOD_PLAYCTL_SPDIF_MUTE;
982b604b	302	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	303	break;
	304
	305	case SNDRV_PCM_TRIGGER_RESUME:
	306	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
75b9b65e JFM	307	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE \|
75b9b65e JFM	308	KIRKWOOD_PLAYCTL_SPDIF_MUTE);
2fbc3821	309	ctl = kirkwood_i2s_play_mute(ctl);
982b604b	310	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	311	break;
	312
	313	default:
	314	return -EINVAL;
	315	}
	316
	317	return 0;
	318	}
	319
	320	static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
	321	int cmd, struct snd_soc_dai *dai)
	322	{
f0fba2ad	323	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5	324	uint32_t ctl, value;
f9b95980	325
	326	value = readl(priv->io + KIRKWOOD_RECCTL);
	327
	328	switch (cmd) {
	329	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	330	/* configure */
d8d11ba5 RK	331	ctl = priv->ctl_rec;
75b9b65e JFM	332	if (dai->id == 0)
	333	ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
	334	else
	335	ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
	336
52b896cf	337	value = ctl & ~KIRKWOOD_RECCTL_ENABLE_MASK;
d8d11ba5 RK	338	writel(value, priv->io + KIRKWOOD_RECCTL);
	339
	340	/* enable interrupts */
f9b95980	341	value = readl(priv->io + KIRKWOOD_INT_MASK);
	342	value \|= KIRKWOOD_INT_CAUSE_REC_BYTES;
	343	writel(value, priv->io + KIRKWOOD_INT_MASK);
	344
d8d11ba5 RK	345	/* enable record */
d8d11ba5 RK	346	writel(ctl, priv->io + KIRKWOOD_RECCTL);
f9b95980	347	break;
	348
	349	case SNDRV_PCM_TRIGGER_STOP:
	350	/* stop audio, disable interrupts */
	351	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	352	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	353	writel(value, priv->io + KIRKWOOD_RECCTL);
	354
	355	value = readl(priv->io + KIRKWOOD_INT_MASK);
	356	value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
	357	writel(value, priv->io + KIRKWOOD_INT_MASK);
	358
	359	/* disable all records */
	360	value = readl(priv->io + KIRKWOOD_RECCTL);
52b896cf	361	value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
f9b95980	362	writel(value, priv->io + KIRKWOOD_RECCTL);
	363	break;
	364
	365	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	366	case SNDRV_PCM_TRIGGER_SUSPEND:
	367	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	368	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	369	writel(value, priv->io + KIRKWOOD_RECCTL);
	370	break;
	371
	372	case SNDRV_PCM_TRIGGER_RESUME:
	373	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	374	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	375	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE);
f9b95980	376	writel(value, priv->io + KIRKWOOD_RECCTL);
	377	break;
	378
	379	default:
	380	return -EINVAL;
f9b95980	381	}
	382
	383	return 0;
	384	}
	385
	386	static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
	387	struct snd_soc_dai *dai)
	388	{
	389	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	390	return kirkwood_i2s_play_trigger(substream, cmd, dai);
	391	else
	392	return kirkwood_i2s_rec_trigger(substream, cmd, dai);
	393
	394	return 0;
	395	}
	396
75b9b65e	397	static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
f9b95980	398	{
	399	unsigned long value;
	400	unsigned int reg_data;
	401
	402	/* put system in a "safe" state : */
	403	/* disable audio interrupts */
	404	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	405	writel(0, priv->io + KIRKWOOD_INT_MASK);
	406
	407	reg_data = readl(priv->io + 0x1200);
	408	reg_data &= (~(0x333FF8));
	409	reg_data \|= 0x111D18;
	410	writel(reg_data, priv->io + 0x1200);
	411
	412	msleep(500);
	413
	414	reg_data = readl(priv->io + 0x1200);
	415	reg_data &= (~(0x333FF8));
	416	reg_data \|= 0x111D18;
	417	writel(reg_data, priv->io + 0x1200);
	418
	419	/* disable playback/record */
	420	value = readl(priv->io + KIRKWOOD_PLAYCTL);
db43b16f	421	value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
f9b95980	422	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	423
	424	value = readl(priv->io + KIRKWOOD_RECCTL);
52b896cf	425	value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
f9b95980	426	writel(value, priv->io + KIRKWOOD_RECCTL);
	427
	428	return 0;
	429
	430	}
	431
85e7652d	432	static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
f0fba2ad	433	.startup = kirkwood_i2s_startup,
f9b95980	434	.trigger = kirkwood_i2s_trigger,
	435	.hw_params = kirkwood_i2s_hw_params,
	436	.set_fmt = kirkwood_i2s_set_fmt,
	437	};
	438
75b9b65e JFM	439	static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
	440	{
	441	.name = "i2s",
	442	.id = 0,
	443	.playback = {
	444	.channels_min = 1,
	445	.channels_max = 2,
	446	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
	447	SNDRV_PCM_RATE_96000,
	448	.formats = KIRKWOOD_I2S_FORMATS,
	449	},
	450	.capture = {
	451	.channels_min = 1,
	452	.channels_max = 2,
	453	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
	454	SNDRV_PCM_RATE_96000,
	455	.formats = KIRKWOOD_I2S_FORMATS,
	456	},
	457	.ops = &kirkwood_i2s_dai_ops,
	458	},
	459	{
	460	.name = "spdif",
	461	.id = 1,
f9b95980	462	.playback = {
	463	.channels_min = 1,
	464	.channels_max = 2,
9e12cbd9 MB	465	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	466	SNDRV_PCM_RATE_96000,
1c195ddb	467	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf	468	},
f9b95980	469	.capture = {
	470	.channels_min = 1,
	471	.channels_max = 2,
9e12cbd9 MB	472	.rates = SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|
9e12cbd9 MB	473	SNDRV_PCM_RATE_96000,
1c195ddb	474	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf RK	475	},
363589bf RK	476	.ops = &kirkwood_i2s_dai_ops,
75b9b65e	477	},
363589bf RK	478	};
363589bf RK	479
75b9b65e JFM	480	static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
	481	{
	482	.name = "i2s",
	483	.id = 0,
	484	.playback = {
	485	.channels_min = 1,
	486	.channels_max = 2,
02fc17c1 JFM	487	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	488	.rate_min = 5512,
	489	.rate_max = 192000,
75b9b65e JFM	490	.formats = KIRKWOOD_I2S_FORMATS,
	491	},
	492	.capture = {
	493	.channels_min = 1,
	494	.channels_max = 2,
02fc17c1 JFM	495	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	496	.rate_min = 5512,
	497	.rate_max = 192000,
75b9b65e JFM	498	.formats = KIRKWOOD_I2S_FORMATS,
	499	},
	500	.ops = &kirkwood_i2s_dai_ops,
	501	},
	502	{
	503	.name = "spdif",
	504	.id = 1,
363589bf RK	505	.playback = {
	506	.channels_min = 1,
	507	.channels_max = 2,
02fc17c1 JFM	508	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	509	.rate_min = 5512,
	510	.rate_max = 192000,
1c195ddb	511	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf RK	512	},
	513	.capture = {
	514	.channels_min = 1,
	515	.channels_max = 2,
02fc17c1 JFM	516	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	517	.rate_min = 5512,
	518	.rate_max = 192000,
1c195ddb	519	.formats = KIRKWOOD_SPDIF_FORMATS,
363589bf	520	},
f9b95980	521	.ops = &kirkwood_i2s_dai_ops,
75b9b65e	522	},
f9b95980	523	};
f9b95980	524
34e15fbd	525	static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
f9b95980	526	{
363589bf	527	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
75b9b65e	528	struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai;
f0fba2ad	529	struct kirkwood_dma_data *priv;
363589bf	530	struct resource *mem;
eb632318	531	struct device_node *np = pdev->dev.of_node;
f9b95980	532	int err;
f9b95980	533
dbc517bf	534	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
c7591edc	535	if (!priv)
dbc517bf	536	return -ENOMEM;
c7591edc	537
f0fba2ad	538	dev_set_drvdata(&pdev->dev, priv);
f9b95980	539
f9b95980	540	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
b25b5aa0 TR	541	priv->io = devm_ioremap_resource(&pdev->dev, mem);
	542	if (IS_ERR(priv->io))
	543	return PTR_ERR(priv->io);
f9b95980	544
f9b95980	545	priv->irq = platform_get_irq(pdev, 0);
e7b2e30a GS	546	if (priv->irq < 0) {
	547	dev_err(&pdev->dev, "platform_get_irq failed: %d\n", priv->irq);
	548	return priv->irq;
f9b95980	549	}
f9b95980	550
eb632318 JFM	551	if (np) {
	552	priv->burst = 128; /* might be 32 or 128 */
	553	} else if (data) {
	554	priv->burst = data->burst;
	555	} else {
	556	dev_err(&pdev->dev, "no DT nor platform data ?!\n");
dbc517bf	557	return -EINVAL;
f9b95980	558	}
f9b95980	559
eb632318	560	priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
e919c716 AL	561	if (IS_ERR(priv->clk)) {
e919c716 AL	562	dev_err(&pdev->dev, "no clock\n");
dbc517bf	563	return PTR_ERR(priv->clk);
e919c716	564	}
dbc517bf RK	565
	566	err = clk_prepare_enable(priv->clk);
	567	if (err < 0)
	568	return err;
e919c716	569
4734dc96	570	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
84aac6c7 JFM	571	if (IS_ERR(priv->extclk)) {
	572	if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
	573	return -EPROBE_DEFER;
	574	} else {
aaa6d062	575	if (clk_is_match(priv->extclk, priv->clk)) {
af64d734	576	devm_clk_put(&pdev->dev, priv->extclk);
d8d11ba5 RK	577	priv->extclk = ERR_PTR(-EINVAL);
	578	} else {
	579	dev_info(&pdev->dev, "found external clock\n");
	580	clk_prepare_enable(priv->extclk);
99d8d3ba	581	soc_dai = kirkwood_i2s_dai_extclk;
d8d11ba5 RK	582	}
	583	}
	584
	585	/* Some sensible defaults - this reflects the powerup values */
	586	priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
	587	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
	588
	589	/* Select the burst size */
eb632318	590	if (priv->burst == 32) {
d8d11ba5 RK	591	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_32;
	592	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_32;
	593	} else {
	594	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_128;
	595	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_128;
	596	}
	597
f98fc0f8	598	err = devm_snd_soc_register_component(&pdev->dev, &kirkwood_soc_component,
75b9b65e	599	soc_dai, 2);
64ddf1f8 RK	600	if (err) {
	601	dev_err(&pdev->dev, "snd_soc_register_component failed\n");
	602	goto err_component;
	603	}
baffab28	604
75b9b65e JFM	605	kirkwood_i2s_init(priv);
75b9b65e JFM	606
64ddf1f8	607	return 0;
f98fc0f8	608
64ddf1f8	609	err_component:
4734dc96	610	if (!IS_ERR(priv->extclk))
363589bf	611	clk_disable_unprepare(priv->extclk);
baffab28	612	clk_disable_unprepare(priv->clk);
dbc517bf	613
f9b95980	614	return err;
	615	}
	616
34e15fbd	617	static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
f9b95980	618	{
f0fba2ad LG	619	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
f0fba2ad LG	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	628	#ifdef CONFIG_OF
7f2c52af	629	static const struct of_device_id mvebu_audio_of_match[] = {
d098b2f0 TP	630	{ .compatible = "marvell,kirkwood-audio" },
d098b2f0 TP	631	{ .compatible = "marvell,dove-audio" },
9a0d5113	632	{ .compatible = "marvell,armada370-audio" },
eb632318 JFM	633	{ }
	634	};
	635	MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
	636	#endif
	637
f9b95980	638	static struct platform_driver kirkwood_i2s_driver = {
f9b95980	639	.probe = kirkwood_i2s_dev_probe,
34e15fbd	640	.remove = kirkwood_i2s_dev_remove,
f9b95980	641	.driver = {
f9b95980	642	.name = DRV_NAME,
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");