[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 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);
	unsigned int i2s_reg, reg;
	unsigned long i2s_value, value;

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

	/* set dco conf */
	kirkwood_set_dco(priv->io, params_rate(params));

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

	value = readl(priv->io+reg);
	value &= ~KIRKWOOD_PLAYCTL_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;
		value |= KIRKWOOD_PLAYCTL_SIZE_16_C;
		break;
	/*
	 * doesn't work... S20_3LE != kirkwood 20bit format ?
	 *
	case SNDRV_PCM_FORMAT_S20_3LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
		value |= KIRKWOOD_PLAYCTL_SIZE_20;
		break;
	*/
	case SNDRV_PCM_FORMAT_S24_LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
		value |= KIRKWOOD_PLAYCTL_SIZE_24;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
		value |= KIRKWOOD_PLAYCTL_SIZE_32;
		break;
	default:
		return -EINVAL;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
		if (params_channels(params) == 1)
			value |= KIRKWOOD_PLAYCTL_MONO_BOTH;
		else
			value |= KIRKWOOD_PLAYCTL_MONO_OFF;
	}

	writel(i2s_value, priv->io+i2s_reg);
	writel(value, priv->io+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:
		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* configure audio & enable i2s playback */
		ctl &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
		ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE
				| KIRKWOOD_PLAYCTL_SPDIF_EN);

		if (priv->burst == 32)
			ctl |= KIRKWOOD_PLAYCTL_BURST_32;
		else
			ctl |= KIRKWOOD_PLAYCTL_BURST_128;
		ctl |= KIRKWOOD_PLAYCTL_I2S_EN;
		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);
	unsigned long value;

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

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		value = readl(priv->io + KIRKWOOD_INT_MASK);
		value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
		writel(value, priv->io + KIRKWOOD_INT_MASK);

		/* configure audio & enable i2s record */
		value = readl(priv->io + KIRKWOOD_RECCTL);
		value &= ~KIRKWOOD_RECCTL_BURST_MASK;
		value &= ~KIRKWOOD_RECCTL_MONO;
		value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE
			| KIRKWOOD_RECCTL_SPDIF_EN);

		if (priv->burst == 32)
			value |= KIRKWOOD_RECCTL_BURST_32;
		else
			value |= KIRKWOOD_RECCTL_BURST_128;
		value |= KIRKWOOD_RECCTL_I2S_EN;

		writel(value, 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 int kirkwood_i2s_remove(struct snd_soc_dai *dai)
{
	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,
	.remove = kirkwood_i2s_remove,
	.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 __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
{
	struct resource *mem;
	struct kirkwood_asoc_platform_data *data =
		pdev->dev.platform_data;
	struct kirkwood_dma_data *priv;
	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);
	if (!mem) {
		dev_err(&pdev->dev, "platform_get_resource failed\n");
		return -ENXIO;
	}

	priv->io = devm_request_and_ioremap(&pdev->dev, mem);
	if (!priv->io) {
		dev_err(&pdev->dev, "devm_request_and_ioremap failed\n");
		return -ENOMEM;
	}

	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;

	err = snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai);
	if (!err)
		return 0;
	dev_err(&pdev->dev, "snd_soc_register_dai failed\n");

	clk_disable_unprepare(priv->clk);

	return err;
}

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

	snd_soc_unregister_dai(&pdev->dev);

	clk_disable_unprepare(priv->clk);

	return 0;
}

static struct platform_driver kirkwood_i2s_driver = {
	.probe  = kirkwood_i2s_dev_probe,
	.remove = __devexit_p(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
f0fba2ad LG	102	static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
	103	struct snd_soc_dai *dai)
	104	{
	105	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
	106
	107	snd_soc_dai_set_dma_data(dai, substream, priv);
	108	return 0;
	109	}
	110
f9b95980	111	static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
	112	struct snd_pcm_hw_params *params,
	113	struct snd_soc_dai *dai)
	114	{
f0fba2ad	115	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
f9b95980	116	unsigned int i2s_reg, reg;
	117	unsigned long i2s_value, value;
	118
	119	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	120	i2s_reg = KIRKWOOD_I2S_PLAYCTL;
	121	reg = KIRKWOOD_PLAYCTL;
	122	} else {
	123	i2s_reg = KIRKWOOD_I2S_RECCTL;
	124	reg = KIRKWOOD_RECCTL;
	125	}
	126
	127	/* set dco conf */
	128	kirkwood_set_dco(priv->io, params_rate(params));
	129
	130	i2s_value = readl(priv->io+i2s_reg);
	131	i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
	132
	133	value = readl(priv->io+reg);
	134	value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
	135
	136	/*
	137	* Size settings in play/rec i2s control regs and play/rec control
	138	* regs must be the same.
	139	*/
	140	switch (params_format(params)) {
	141	case SNDRV_PCM_FORMAT_S16_LE:
	142	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_16;
	143	value \|= KIRKWOOD_PLAYCTL_SIZE_16_C;
	144	break;
	145	/*
	146	* doesn't work... S20_3LE != kirkwood 20bit format ?
	147	*
	148	case SNDRV_PCM_FORMAT_S20_3LE:
	149	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_20;
	150	value \|= KIRKWOOD_PLAYCTL_SIZE_20;
	151	break;
	152	*/
	153	case SNDRV_PCM_FORMAT_S24_LE:
	154	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_24;
	155	value \|= KIRKWOOD_PLAYCTL_SIZE_24;
	156	break;
	157	case SNDRV_PCM_FORMAT_S32_LE:
	158	i2s_value \|= KIRKWOOD_I2S_CTL_SIZE_32;
	159	value \|= KIRKWOOD_PLAYCTL_SIZE_32;
	160	break;
	161	default:
	162	return -EINVAL;
	163	}
dfe4c936	164
	165	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	166	value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
	167	if (params_channels(params) == 1)
	168	value \|= KIRKWOOD_PLAYCTL_MONO_BOTH;
	169	else
	170	value \|= KIRKWOOD_PLAYCTL_MONO_OFF;
	171	}
	172
f9b95980	173	writel(i2s_value, priv->io+i2s_reg);
	174	writel(value, priv->io+reg);
	175
	176	return 0;
	177	}
	178
	179	static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
	180	int cmd, struct snd_soc_dai *dai)
	181	{
f0fba2ad	182	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
982b604b RK	183	uint32_t ctl, value;
	184
	185	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	186	if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
	187	unsigned timeout = 5000;
	188	/*
	189	* The Armada510 spec says that if we enter pause mode, the
	190	* busy bit must be read back as clear _twice_. Make sure
	191	* we respect that otherwise we get DMA underruns.
	192	*/
	193	do {
	194	value = ctl;
	195	ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
	196	if (!((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
	197	break;
	198	udelay(1);
	199	} while (timeout--);
	200
	201	if ((ctl \| value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
	202	dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
	203	ctl);
	204	}
f9b95980	205
	206	switch (cmd) {
	207	case SNDRV_PCM_TRIGGER_START:
f9b95980	208	value = readl(priv->io + KIRKWOOD_INT_MASK);
	209	value \|= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	210	writel(value, priv->io + KIRKWOOD_INT_MASK);
	211
	212	/* configure audio & enable i2s playback */
982b604b RK	213	ctl &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
982b604b RK	214	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE
b424ec95	215	\| KIRKWOOD_PLAYCTL_SPDIF_EN);
f9b95980	216
f9b95980	217	if (priv->burst == 32)
982b604b	218	ctl \|= KIRKWOOD_PLAYCTL_BURST_32;
f9b95980	219	else
982b604b RK	220	ctl \|= KIRKWOOD_PLAYCTL_BURST_128;
	221	ctl \|= KIRKWOOD_PLAYCTL_I2S_EN;
	222	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	223	break;
	224
	225	case SNDRV_PCM_TRIGGER_STOP:
	226	/* stop audio, disable interrupts */
982b604b RK	227	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	228	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	229
	230	value = readl(priv->io + KIRKWOOD_INT_MASK);
	231	value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
	232	writel(value, priv->io + KIRKWOOD_INT_MASK);
	233
	234	/* disable all playbacks */
982b604b RK	235	ctl &= ~(KIRKWOOD_PLAYCTL_I2S_EN \| KIRKWOOD_PLAYCTL_SPDIF_EN);
982b604b RK	236	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	237	break;
	238
	239	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	240	case SNDRV_PCM_TRIGGER_SUSPEND:
982b604b RK	241	ctl \|= KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE;
982b604b RK	242	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	243	break;
	244
	245	case SNDRV_PCM_TRIGGER_RESUME:
	246	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
982b604b RK	247	ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE \| KIRKWOOD_PLAYCTL_I2S_MUTE);
982b604b RK	248	writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
f9b95980	249	break;
	250
	251	default:
	252	return -EINVAL;
	253	}
	254
	255	return 0;
	256	}
	257
	258	static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
	259	int cmd, struct snd_soc_dai *dai)
	260	{
f0fba2ad	261	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
f9b95980	262	unsigned long value;
	263
	264	value = readl(priv->io + KIRKWOOD_RECCTL);
	265
	266	switch (cmd) {
	267	case SNDRV_PCM_TRIGGER_START:
f9b95980	268	value = readl(priv->io + KIRKWOOD_INT_MASK);
	269	value \|= KIRKWOOD_INT_CAUSE_REC_BYTES;
	270	writel(value, priv->io + KIRKWOOD_INT_MASK);
	271
	272	/* configure audio & enable i2s record */
	273	value = readl(priv->io + KIRKWOOD_RECCTL);
	274	value &= ~KIRKWOOD_RECCTL_BURST_MASK;
	275	value &= ~KIRKWOOD_RECCTL_MONO;
b424ec95	276	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE
b424ec95	277	\| KIRKWOOD_RECCTL_SPDIF_EN);
f9b95980	278
	279	if (priv->burst == 32)
	280	value \|= KIRKWOOD_RECCTL_BURST_32;
	281	else
	282	value \|= KIRKWOOD_RECCTL_BURST_128;
	283	value \|= KIRKWOOD_RECCTL_I2S_EN;
	284
	285	writel(value, priv->io + KIRKWOOD_RECCTL);
	286	break;
	287
	288	case SNDRV_PCM_TRIGGER_STOP:
	289	/* stop audio, disable interrupts */
	290	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	291	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	292	writel(value, priv->io + KIRKWOOD_RECCTL);
	293
	294	value = readl(priv->io + KIRKWOOD_INT_MASK);
	295	value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
	296	writel(value, priv->io + KIRKWOOD_INT_MASK);
	297
	298	/* disable all records */
	299	value = readl(priv->io + KIRKWOOD_RECCTL);
	300	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	301	writel(value, priv->io + KIRKWOOD_RECCTL);
	302	break;
	303
	304	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	305	case SNDRV_PCM_TRIGGER_SUSPEND:
	306	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	307	value \|= KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE;
f9b95980	308	writel(value, priv->io + KIRKWOOD_RECCTL);
	309	break;
	310
	311	case SNDRV_PCM_TRIGGER_RESUME:
	312	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	313	value = readl(priv->io + KIRKWOOD_RECCTL);
b424ec95	314	value &= ~(KIRKWOOD_RECCTL_PAUSE \| KIRKWOOD_RECCTL_MUTE);
f9b95980	315	writel(value, priv->io + KIRKWOOD_RECCTL);
	316	break;
	317
	318	default:
	319	return -EINVAL;
f9b95980	320	}
	321
	322	return 0;
	323	}
	324
	325	static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
	326	struct snd_soc_dai *dai)
	327	{
	328	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	329	return kirkwood_i2s_play_trigger(substream, cmd, dai);
	330	else
	331	return kirkwood_i2s_rec_trigger(substream, cmd, dai);
	332
	333	return 0;
	334	}
	335
f0fba2ad	336	static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
f9b95980	337	{
f0fba2ad	338	struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
f9b95980	339	unsigned long value;
	340	unsigned int reg_data;
	341
	342	/* put system in a "safe" state : */
	343	/* disable audio interrupts */
	344	writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
	345	writel(0, priv->io + KIRKWOOD_INT_MASK);
	346
	347	reg_data = readl(priv->io + 0x1200);
	348	reg_data &= (~(0x333FF8));
	349	reg_data \|= 0x111D18;
	350	writel(reg_data, priv->io + 0x1200);
	351
	352	msleep(500);
	353
	354	reg_data = readl(priv->io + 0x1200);
	355	reg_data &= (~(0x333FF8));
	356	reg_data \|= 0x111D18;
	357	writel(reg_data, priv->io + 0x1200);
	358
	359	/* disable playback/record */
	360	value = readl(priv->io + KIRKWOOD_PLAYCTL);
	361	value &= ~(KIRKWOOD_PLAYCTL_I2S_EN\|KIRKWOOD_PLAYCTL_SPDIF_EN);
	362	writel(value, priv->io + KIRKWOOD_PLAYCTL);
	363
	364	value = readl(priv->io + KIRKWOOD_RECCTL);
	365	value &= ~(KIRKWOOD_RECCTL_I2S_EN \| KIRKWOOD_RECCTL_SPDIF_EN);
	366	writel(value, priv->io + KIRKWOOD_RECCTL);
	367
	368	return 0;
	369
	370	}
	371
f0fba2ad	372	static int kirkwood_i2s_remove(struct snd_soc_dai *dai)
f9b95980	373	{
f0fba2ad	374	return 0;
f9b95980	375	}
f9b95980	376
85e7652d	377	static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
f0fba2ad	378	.startup = kirkwood_i2s_startup,
f9b95980	379	.trigger = kirkwood_i2s_trigger,
	380	.hw_params = kirkwood_i2s_hw_params,
	381	.set_fmt = kirkwood_i2s_set_fmt,
	382	};
	383
	384
f0fba2ad	385	static struct snd_soc_dai_driver kirkwood_i2s_dai = {
f9b95980	386	.probe = kirkwood_i2s_probe,
	387	.remove = kirkwood_i2s_remove,
	388	.playback = {
	389	.channels_min = 1,
	390	.channels_max = 2,
	391	.rates = KIRKWOOD_I2S_RATES,
	392	.formats = KIRKWOOD_I2S_FORMATS,},
	393	.capture = {
	394	.channels_min = 1,
	395	.channels_max = 2,
	396	.rates = KIRKWOOD_I2S_RATES,
	397	.formats = KIRKWOOD_I2S_FORMATS,},
	398	.ops = &kirkwood_i2s_dai_ops,
	399	};
f9b95980	400
	401	static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
	402	{
	403	struct resource *mem;
	404	struct kirkwood_asoc_platform_data *data =
	405	pdev->dev.platform_data;
f0fba2ad	406	struct kirkwood_dma_data *priv;
f9b95980	407	int err;
f9b95980	408
dbc517bf	409	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
f9b95980	410	if (!priv) {
f9b95980	411	dev_err(&pdev->dev, "allocation failed\n");
dbc517bf	412	return -ENOMEM;
f9b95980	413	}
f0fba2ad	414	dev_set_drvdata(&pdev->dev, priv);
f9b95980	415
	416	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	417	if (!mem) {
	418	dev_err(&pdev->dev, "platform_get_resource failed\n");
dbc517bf	419	return -ENXIO;
f9b95980	420	}
f9b95980	421
dbc517bf	422	priv->io = devm_request_and_ioremap(&pdev->dev, mem);
f9b95980	423	if (!priv->io) {
dbc517bf RK	424	dev_err(&pdev->dev, "devm_request_and_ioremap failed\n");
dbc517bf RK	425	return -ENOMEM;
f9b95980	426	}
	427
	428	priv->irq = platform_get_irq(pdev, 0);
	429	if (priv->irq <= 0) {
	430	dev_err(&pdev->dev, "platform_get_irq failed\n");
dbc517bf	431	return -ENXIO;
f9b95980	432	}
f9b95980	433
d4d9820b	434	if (!data) {
f9b95980	435	dev_err(&pdev->dev, "no platform data ?!\n");
dbc517bf	436	return -EINVAL;
f9b95980	437	}
f9b95980	438
f9b95980	439	priv->burst = data->burst;
f9b95980	440
dbc517bf	441	priv->clk = devm_clk_get(&pdev->dev, NULL);
e919c716 AL	442	if (IS_ERR(priv->clk)) {
e919c716 AL	443	dev_err(&pdev->dev, "no clock\n");
dbc517bf	444	return PTR_ERR(priv->clk);
e919c716	445	}
dbc517bf RK	446
	447	err = clk_prepare_enable(priv->clk);
	448	if (err < 0)
	449	return err;
e919c716	450
baffab28 SB	451	err = snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai);
	452	if (!err)
	453	return 0;
	454	dev_err(&pdev->dev, "snd_soc_register_dai failed\n");
	455
	456	clk_disable_unprepare(priv->clk);
dbc517bf	457
f9b95980	458	return err;
	459	}
	460
	461	static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
	462	{
f0fba2ad LG	463	struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
	464
	465	snd_soc_unregister_dai(&pdev->dev);
e919c716 AL	466
e919c716 AL	467	clk_disable_unprepare(priv->clk);
f0fba2ad	468
f9b95980	469	return 0;
	470	}
	471
	472	static struct platform_driver kirkwood_i2s_driver = {
	473	.probe = kirkwood_i2s_dev_probe,
48860e40	474	.remove = __devexit_p(kirkwood_i2s_dev_remove),
f9b95980	475	.driver = {
	476	.name = DRV_NAME,
	477	.owner = THIS_MODULE,
	478	},
	479	};
	480
41b10225	481	module_platform_driver(kirkwood_i2s_driver);
f9b95980	482
f9b95980	483	/* Module information */
69737897	484	MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
f9b95980	485	MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
	486	MODULE_LICENSE("GPL");
	487	MODULE_ALIAS("platform:kirkwood-i2s");