[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 "kirkwood.h"

#define DRV_NAME	"kirkwood-i2s"

#define KIRKWOOD_I2S_RATES \
	(SNDRV_PCM_RATE_44100 | \
	 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
#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 (rate == 44100 || rate == 48000 || rate == 96000) {
		/* use internal dco for supported rates */
		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 if (!IS_ERR(priv->extclk)) {
		/* use optional external clk for other rates */
		dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
			__func__, rate, 256 * rate);
		clk_set_rate(priv->extclk, 256 * rate);

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

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

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

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

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

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

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

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

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

		priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
				    KIRKWOOD_PLAYCTL_I2S_EN |
				    KIRKWOOD_PLAYCTL_SPDIF_EN |
				    KIRKWOOD_PLAYCTL_SIZE_MASK);
		priv->ctl_play |= ctl_play;
	} else {
		priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
		priv->ctl_rec |= ctl_rec;
	}

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

	return 0;
}

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

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

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

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		/* configure */
		ctl = priv->ctl_play;
		value = ctl & ~(KIRKWOOD_PLAYCTL_I2S_EN |
				KIRKWOOD_PLAYCTL_SPDIF_EN);
		writel(value, priv->io + KIRKWOOD_PLAYCTL);

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

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

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

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

		/* disable all playbacks */
		ctl &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
		writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
		break;

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

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

	default:
		return -EINVAL;
	}

	return 0;
}

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

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

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

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

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

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

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

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

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

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

	default:
		return -EINVAL;
	}

	return 0;
}

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

	return 0;
}

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

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

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

	msleep(500);

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

	/* disable playback/record */
	value = readl(priv->io + KIRKWOOD_PLAYCTL);
	value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
	writel(value, priv->io + KIRKWOOD_PLAYCTL);

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

	return 0;

}

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


static struct snd_soc_dai_driver kirkwood_i2s_dai = {
	.probe = kirkwood_i2s_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = KIRKWOOD_I2S_RATES,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = KIRKWOOD_I2S_RATES,
		.formats = KIRKWOOD_I2S_FORMATS,
	},
	.ops = &kirkwood_i2s_dai_ops,
};

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

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

static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
{
	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
	struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;
	struct kirkwood_dma_data *priv;
	struct resource *mem;
	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 (!data) {
		dev_err(&pdev->dev, "no platform data ?!\n");
		return -EINVAL;
	}

	priv->burst = data->burst;

	priv->clk = devm_clk_get(&pdev->dev, 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 (priv->extclk == priv->clk) {
			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 (data->burst == 32) {
		priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
		priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
	} else {
		priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
		priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
	}

	err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
					 soc_dai, 1);
	if (!err)
		return 0;
	dev_err(&pdev->dev, "snd_soc_register_component failed\n");

	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_component(&pdev->dev);

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

	return 0;
}

static struct platform_driver kirkwood_i2s_driver = {
	.probe  = kirkwood_i2s_dev_probe,
	.remove = kirkwood_i2s_dev_remove,
	.driver = {
		.name = DRV_NAME,
		.owner = THIS_MODULE,
	},
};

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:kirkwood-i2s");
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>
f9b95980	25	#include "kirkwood.h"
	26
	27	#define DRV_NAME "kirkwood-i2s"
	28
	29	#define KIRKWOOD_I2S_RATES \
	30	(SNDRV_PCM_RATE_44100 \| \
	31	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000)
	32	#define KIRKWOOD_I2S_FORMATS \
	33	(SNDRV_PCM_FMTBIT_S16_LE \| \
	34	SNDRV_PCM_FMTBIT_S24_LE \| \
	35	SNDRV_PCM_FMTBIT_S32_LE)
	36
f9b95980	37	static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
	38	unsigned int fmt)
	39	{
f0fba2ad	40	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
f9b95980	41	unsigned long mask;
	42	unsigned long value;
	43
	44	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	45	case SND_SOC_DAIFMT_RIGHT_J:
	46	mask = KIRKWOOD_I2S_CTL_RJ;
	47	break;
	48	case SND_SOC_DAIFMT_LEFT_J:
	49	mask = KIRKWOOD_I2S_CTL_LJ;
	50	break;
	51	case SND_SOC_DAIFMT_I2S:
	52	mask = KIRKWOOD_I2S_CTL_I2S;
	53	break;
	54	default:
	55	return -EINVAL;
	56	}
	57
	58	/*
	59	* Set same format for playback and record
	60	* This avoids some troubles.
	61	*/
	62	value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
	63	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	64	value \|= mask;
	65	writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
	66
	67	value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
	68	value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
	69	value \|= mask;
	70	writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
	71
	72	return 0;
	73	}
	74
	75	static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
	76	{
	77	unsigned long value;
	78
	79	value = KIRKWOOD_DCO_CTL_OFFSET_0;
	80	switch (rate) {
	81	default:
	82	case 44100:
	83	value \|= KIRKWOOD_DCO_CTL_FREQ_11;
	84	break;
	85	case 48000:
	86	value \|= KIRKWOOD_DCO_CTL_FREQ_12;
	87	break;
	88	case 96000:
	89	value \|= KIRKWOOD_DCO_CTL_FREQ_24;
	90	break;
	91	}
	92	writel(value, io + KIRKWOOD_DCO_CTL);
	93
	94	/* wait for dco locked */
	95	do {
	96	cpu_relax();
	97	value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
2424d458	98	value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
f9b95980	99	} while (value == 0);
	100	}
	101
363589bf RK	102	static void kirkwood_set_rate(struct snd_soc_dai *dai,
	103	struct kirkwood_dma_data *priv, unsigned long rate)
	104	{
	105	uint32_t clks_ctrl;
	106
	107	if (rate == 44100 \|\| rate == 48000 \|\| rate == 96000) {
	108	/* use internal dco for supported rates */
	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;
	114	} else if (!IS_ERR(priv->extclk)) {
	115	/* use optional external clk for other rates */
	116	dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
	117	__func__, rate, 256 * rate);
	118	clk_set_rate(priv->extclk, 256 * rate);
	119
	120	clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
	121	}
	122	writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
	123	}
	124
f0fba2ad LG	125	static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
	126	struct snd_soc_dai *dai)
	127	{
	128	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	129
	130	snd_soc_dai_set_dma_data(dai, substream, priv);
	131	return 0;
	132	}
	133
f9b95980	134	static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
	135	struct snd_pcm_hw_params *params,
	136	struct snd_soc_dai *dai)
	137	{
f0fba2ad	138	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5 RK	139	uint32_t ctl_play, ctl_rec;
	140	unsigned int i2s_reg;
	141	unsigned long i2s_value;
f9b95980	142
	143	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	144	i2s_reg = KIRKWOOD_I2S_PLAYCTL;
f9b95980	145	} else {
f9b95980	146	i2s_reg = KIRKWOOD_I2S_RECCTL;
f9b95980	147	}
f9b95980	148
363589bf	149	kirkwood_set_rate(dai, priv, params_rate(params));
f9b95980	150
	151	i2s_value = readl(priv->io+i2s_reg);
	152	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
	153
f9b95980	154	/*
	155	* Size settings in play/rec i2s control regs and play/rec control
	156	* regs must be the same.
	157	*/
	158	switch (params_format(params)) {
	159	case SNDRV_PCM_FORMAT_S16_LE:
	160	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_16;
d8d11ba5 RK	161	ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C \|
	162	KIRKWOOD_PLAYCTL_I2S_EN;
	163	ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C \|
	164	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	165	break;
	166	/*
	167	* doesn't work... S20_3LE != kirkwood 20bit format ?
	168	*
	169	case SNDRV_PCM_FORMAT_S20_3LE:
	170	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_20;
d8d11ba5 RK	171	ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 \|
	172	KIRKWOOD_PLAYCTL_I2S_EN;
	173	ctl_rec = KIRKWOOD_RECCTL_SIZE_20 \|
	174	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	175	break;
	176	*/
	177	case SNDRV_PCM_FORMAT_S24_LE:
	178	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_24;
d8d11ba5 RK	179	ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 \|
	180	KIRKWOOD_PLAYCTL_I2S_EN;
	181	ctl_rec = KIRKWOOD_RECCTL_SIZE_24 \|
	182	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	183	break;
	184	case SNDRV_PCM_FORMAT_S32_LE:
	185	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_32;
d8d11ba5 RK	186	ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 \|
	187	KIRKWOOD_PLAYCTL_I2S_EN;
	188	ctl_rec = KIRKWOOD_RECCTL_SIZE_32 \|
	189	KIRKWOOD_RECCTL_I2S_EN;
f9b95980	190	break;
	191	default:
	192	return -EINVAL;
	193	}
dfe4c936	194
dfe4c936	195	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dfe4c936	196	if (params_channels(params) == 1)
d8d11ba5	197	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_BOTH;
dfe4c936	198	else
d8d11ba5 RK	199	ctl_play \|= KIRKWOOD_PLAYCTL_MONO_OFF;
	200
	201	priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK \|
	202	KIRKWOOD_PLAYCTL_I2S_EN \|
	203	KIRKWOOD_PLAYCTL_SPDIF_EN \|
	204	KIRKWOOD_PLAYCTL_SIZE_MASK);
	205	priv->ctl_play \|= ctl_play;
	206	} else {
	207	priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
	208	priv->ctl_rec \|= ctl_rec;
dfe4c936	209	}
dfe4c936	210
f9b95980	211	writel(i2s_value, priv->io+i2s_reg);
f9b95980	212
	213	return 0;
	214	}
	215
	216	static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
	217	int cmd, struct snd_soc_dai *dai)
	218	{
f0fba2ad	219	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
982b604b RK	220	uint32_t ctl, value;
	221
	222	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	223	if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
	224	unsigned timeout = 5000;
	225	/*
	226	* The Armada510 spec says that if we enter pause mode, the
	227	* busy bit must be read back as clear _twice_. Make sure
	228	* we respect that otherwise we get DMA underruns.
	229	*/
	230	do {
	231	value = ctl;
	232	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	233	if (!((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
	234	break;
	235	udelay(1);
	236	} while (timeout--);
	237
	238	if ((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
	239	dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
	240	ctl);
	241	}
f9b95980	242
	243	switch (cmd) {
	244	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	245	/* configure */
	246	ctl = priv->ctl_play;
	247	value = ctl & ~(KIRKWOOD_PLAYCTL_I2S_EN \|
	248	KIRKWOOD_PLAYCTL_SPDIF_EN);
	249	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	250
	251	/* enable interrupts */
f9b95980	252	value = readl(priv->io + KIRKWOOD_INT_MASK);
	253	value \|= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	254	writel(value, priv->io + KIRKWOOD_INT_MASK);
	255
d8d11ba5	256	/* enable playback */
982b604b	257	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	258	break;
	259
	260	case SNDRV_PCM_TRIGGER_STOP:
	261	/* stop audio, disable interrupts */
982b604b RK	262	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	263	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	264
	265	value = readl(priv->io + KIRKWOOD_INT_MASK);
	266	value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	267	writel(value, priv->io + KIRKWOOD_INT_MASK);
	268
	269	/* disable all playbacks */
982b604b RK	270	ctl &= ~(KIRKWOOD_PLAYCTL_I2S_EN \| KIRKWOOD_PLAYCTL_SPDIF_EN);
982b604b RK	271	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	272	break;
	273
	274	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	275	case SNDRV_PCM_TRIGGER_SUSPEND:
982b604b RK	276	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	277	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	278	break;
	279
	280	case SNDRV_PCM_TRIGGER_RESUME:
	281	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
982b604b RK	282	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE);
982b604b RK	283	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	284	break;
	285
	286	default:
	287	return -EINVAL;
	288	}
	289
	290	return 0;
	291	}
	292
	293	static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
	294	int cmd, struct snd_soc_dai *dai)
	295	{
f0fba2ad	296	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
d8d11ba5	297	uint32_t ctl, value;
f9b95980	298
	299	value = readl(priv->io + KIRKWOOD_RECCTL);
	300
	301	switch (cmd) {
	302	case SNDRV_PCM_TRIGGER_START:
d8d11ba5 RK	303	/* configure */
	304	ctl = priv->ctl_rec;
	305	value = ctl & ~KIRKWOOD_RECCTL_I2S_EN;
	306	writel(value, priv->io + KIRKWOOD_RECCTL);
	307
	308	/* enable interrupts */
f9b95980	309	value = readl(priv->io + KIRKWOOD_INT_MASK);
	310	value \|= KIRKWOOD_INT_CAUSE_REC_BYTES;
	311	writel(value, priv->io + KIRKWOOD_INT_MASK);
	312
d8d11ba5 RK	313	/* enable record */
d8d11ba5 RK	314	writel(ctl, priv->io + KIRKWOOD_RECCTL);
f9b95980	315	break;
	316
	317	case SNDRV_PCM_TRIGGER_STOP:
	318	/* stop audio, disable interrupts */
	319	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	320	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	321	writel(value, priv->io + KIRKWOOD_RECCTL);
	322
	323	value = readl(priv->io + KIRKWOOD_INT_MASK);
	324	value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
	325	writel(value, priv->io + KIRKWOOD_INT_MASK);
	326
	327	/* disable all records */
	328	value = readl(priv->io + KIRKWOOD_RECCTL);
	329	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	330	writel(value, priv->io + KIRKWOOD_RECCTL);
	331	break;
	332
	333	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	334	case SNDRV_PCM_TRIGGER_SUSPEND:
	335	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	336	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	337	writel(value, priv->io + KIRKWOOD_RECCTL);
	338	break;
	339
	340	case SNDRV_PCM_TRIGGER_RESUME:
	341	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	342	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	343	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE);
f9b95980	344	writel(value, priv->io + KIRKWOOD_RECCTL);
	345	break;
	346
	347	default:
	348	return -EINVAL;
f9b95980	349	}
	350
	351	return 0;
	352	}
	353
	354	static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
	355	struct snd_soc_dai *dai)
	356	{
	357	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	358	return kirkwood_i2s_play_trigger(substream, cmd, dai);
	359	else
	360	return kirkwood_i2s_rec_trigger(substream, cmd, dai);
	361
	362	return 0;
	363	}
	364
f0fba2ad	365	static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
f9b95980	366	{
f0fba2ad	367	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
f9b95980	368	unsigned long value;
	369	unsigned int reg_data;
	370
	371	/* put system in a "safe" state : */
	372	/* disable audio interrupts */
	373	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	374	writel(0, priv->io + KIRKWOOD_INT_MASK);
	375
	376	reg_data = readl(priv->io + 0x1200);
	377	reg_data &= (~(0x333FF8));
	378	reg_data \|= 0x111D18;
	379	writel(reg_data, priv->io + 0x1200);
	380
	381	msleep(500);
	382
	383	reg_data = readl(priv->io + 0x1200);
	384	reg_data &= (~(0x333FF8));
	385	reg_data \|= 0x111D18;
	386	writel(reg_data, priv->io + 0x1200);
	387
	388	/* disable playback/record */
	389	value = readl(priv->io + KIRKWOOD_PLAYCTL);
	390	value &= ~(KIRKWOOD_PLAYCTL_I2S_EN\|KIRKWOOD_PLAYCTL_SPDIF_EN);
	391	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	392
	393	value = readl(priv->io + KIRKWOOD_RECCTL);
	394	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	395	writel(value, priv->io + KIRKWOOD_RECCTL);
	396
	397	return 0;
	398
	399	}
	400
85e7652d	401	static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
f0fba2ad	402	.startup = kirkwood_i2s_startup,
f9b95980	403	.trigger = kirkwood_i2s_trigger,
	404	.hw_params = kirkwood_i2s_hw_params,
	405	.set_fmt = kirkwood_i2s_set_fmt,
	406	};
	407
	408
f0fba2ad	409	static struct snd_soc_dai_driver kirkwood_i2s_dai = {
f9b95980	410	.probe = kirkwood_i2s_probe,
f9b95980	411	.playback = {
	412	.channels_min = 1,
	413	.channels_max = 2,
	414	.rates = KIRKWOOD_I2S_RATES,
363589bf RK	415	.formats = KIRKWOOD_I2S_FORMATS,
363589bf RK	416	},
f9b95980	417	.capture = {
	418	.channels_min = 1,
	419	.channels_max = 2,
	420	.rates = KIRKWOOD_I2S_RATES,
363589bf RK	421	.formats = KIRKWOOD_I2S_FORMATS,
	422	},
	423	.ops = &kirkwood_i2s_dai_ops,
	424	};
	425
	426	static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk = {
	427	.probe = kirkwood_i2s_probe,
363589bf RK	428	.playback = {
	429	.channels_min = 1,
	430	.channels_max = 2,
	431	.rates = SNDRV_PCM_RATE_8000_192000 \|
	432	SNDRV_PCM_RATE_CONTINUOUS \|
	433	SNDRV_PCM_RATE_KNOT,
	434	.formats = KIRKWOOD_I2S_FORMATS,
	435	},
	436	.capture = {
	437	.channels_min = 1,
	438	.channels_max = 2,
	439	.rates = SNDRV_PCM_RATE_8000_192000 \|
	440	SNDRV_PCM_RATE_CONTINUOUS \|
	441	SNDRV_PCM_RATE_KNOT,
	442	.formats = KIRKWOOD_I2S_FORMATS,
	443	},
f9b95980	444	.ops = &kirkwood_i2s_dai_ops,
f9b95980	445	};
f9b95980	446
83d85f53 KM	447	static const struct snd_soc_component_driver kirkwood_i2s_component = {
	448	.name = DRV_NAME,
	449	};
	450
34e15fbd	451	static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
f9b95980	452	{
363589bf RK	453	struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
363589bf RK	454	struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;
f0fba2ad	455	struct kirkwood_dma_data *priv;
363589bf	456	struct resource *mem;
f9b95980	457	int err;
f9b95980	458
dbc517bf	459	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f9b95980	460	if (!priv) {
f9b95980	461	dev_err(&pdev->dev, "allocation failed\n");
dbc517bf	462	return -ENOMEM;
f9b95980	463	}
f0fba2ad	464	dev_set_drvdata(&pdev->dev, priv);
f9b95980	465
f9b95980	466	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
b25b5aa0 TR	467	priv->io = devm_ioremap_resource(&pdev->dev, mem);
	468	if (IS_ERR(priv->io))
	469	return PTR_ERR(priv->io);
f9b95980	470
	471	priv->irq = platform_get_irq(pdev, 0);
	472	if (priv->irq <= 0) {
	473	dev_err(&pdev->dev, "platform_get_irq failed\n");
dbc517bf	474	return -ENXIO;
f9b95980	475	}
f9b95980	476
d4d9820b	477	if (!data) {
f9b95980	478	dev_err(&pdev->dev, "no platform data ?!\n");
dbc517bf	479	return -EINVAL;
f9b95980	480	}
f9b95980	481
f9b95980	482	priv->burst = data->burst;
f9b95980	483
dbc517bf	484	priv->clk = devm_clk_get(&pdev->dev, NULL);
e919c716 AL	485	if (IS_ERR(priv->clk)) {
e919c716 AL	486	dev_err(&pdev->dev, "no clock\n");
dbc517bf	487	return PTR_ERR(priv->clk);
e919c716	488	}
dbc517bf RK	489
	490	err = clk_prepare_enable(priv->clk);
	491	if (err < 0)
	492	return err;
e919c716	493
4734dc96	494	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
d8d11ba5 RK	495	if (!IS_ERR(priv->extclk)) {
d8d11ba5 RK	496	if (priv->extclk == priv->clk) {
d8d11ba5 RK	497	priv->extclk = ERR_PTR(-EINVAL);
	498	} else {
	499	dev_info(&pdev->dev, "found external clock\n");
	500	clk_prepare_enable(priv->extclk);
	501	soc_dai = &kirkwood_i2s_dai_extclk;
	502	}
	503	}
	504
	505	/* Some sensible defaults - this reflects the powerup values */
	506	priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
	507	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
	508
	509	/* Select the burst size */
	510	if (data->burst == 32) {
	511	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_32;
	512	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_32;
	513	} else {
	514	priv->ctl_play \|= KIRKWOOD_PLAYCTL_BURST_128;
	515	priv->ctl_rec \|= KIRKWOOD_RECCTL_BURST_128;
	516	}
	517
83d85f53 KM	518	err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
83d85f53 KM	519	soc_dai, 1);
baffab28 SB	520	if (!err)
baffab28 SB	521	return 0;
83d85f53	522	dev_err(&pdev->dev, "snd_soc_register_component failed\n");
baffab28	523
4734dc96	524	if (!IS_ERR(priv->extclk))
363589bf	525	clk_disable_unprepare(priv->extclk);
baffab28	526	clk_disable_unprepare(priv->clk);
dbc517bf	527
f9b95980	528	return err;
	529	}
	530
34e15fbd	531	static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
f9b95980	532	{
f0fba2ad LG	533	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
f0fba2ad LG	534
83d85f53	535	snd_soc_unregister_component(&pdev->dev);
e919c716	536
4734dc96	537	if (!IS_ERR(priv->extclk))
363589bf	538	clk_disable_unprepare(priv->extclk);
e919c716	539	clk_disable_unprepare(priv->clk);
f0fba2ad	540
f9b95980	541	return 0;
	542	}
	543
	544	static struct platform_driver kirkwood_i2s_driver = {
	545	.probe = kirkwood_i2s_dev_probe,
34e15fbd	546	.remove = kirkwood_i2s_dev_remove,
f9b95980	547	.driver = {
	548	.name = DRV_NAME,
	549	.owner = THIS_MODULE,
	550	},
	551	};
	552
41b10225	553	module_platform_driver(kirkwood_i2s_driver);
f9b95980	554
f9b95980	555	/* Module information */
69737897	556	MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
f9b95980	557	MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
	558	MODULE_LICENSE("GPL");
	559	MODULE_ALIAS("platform:kirkwood-i2s");