[deliverable/linux.git] / sound / soc / fsl / p1022_ds.c

/**
 * Freescale P1022DS ALSA SoC Machine driver
 *
 * Author: Timur Tabi <timur@freescale.com>
 *
 * Copyright 2010 Freescale Semiconductor, Inc.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <asm/fsl_guts.h>

#include "fsl_dma.h"
#include "fsl_ssi.h"
#include "fsl_utils.h"

/* P1022-specific PMUXCR and DMUXCR bit definitions */

#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK	0x0001c000
#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI	0x00010000
#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI		0x00018000

#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK	0x00000c00
#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI	0x00000000

#define CCSR_GUTS_DMUXCR_PAD	1	/* DMA controller/channel set to pad */
#define CCSR_GUTS_DMUXCR_SSI	2	/* DMA controller/channel set to SSI */

/*
 * Set the DMACR register in the GUTS
 *
 * The DMACR register determines the source of initiated transfers for each
 * channel on each DMA controller.  Rather than have a bunch of repetitive
 * macros for the bit patterns, we just have a function that calculates
 * them.
 *
 * guts: Pointer to GUTS structure
 * co: The DMA controller (0 or 1)
 * ch: The channel on the DMA controller (0, 1, 2, or 3)
 * device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
 */
static inline void guts_set_dmuxcr(struct ccsr_guts_85xx __iomem *guts,
	unsigned int co, unsigned int ch, unsigned int device)
{
	unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));

	clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
}

/* There's only one global utilities register */
static phys_addr_t guts_phys;

/**
 * machine_data: machine-specific ASoC device data
 *
 * This structure contains data for a single sound platform device on an
 * P1022 DS.  Some of the data is taken from the device tree.
 */
struct machine_data {
	struct snd_soc_dai_link dai[2];
	struct snd_soc_card card;
	unsigned int dai_format;
	unsigned int codec_clk_direction;
	unsigned int cpu_clk_direction;
	unsigned int clk_frequency;
	unsigned int ssi_id;		/* 0 = SSI1, 1 = SSI2, etc */
	unsigned int dma_id[2];		/* 0 = DMA1, 1 = DMA2, etc */
	unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
	char codec_name[DAI_NAME_SIZE];
	char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
};

/**
 * p1022_ds_machine_probe: initialize the board
 *
 * This function is used to initialize the board-specific hardware.
 *
 * Here we program the DMACR and PMUXCR registers.
 */
static int p1022_ds_machine_probe(struct snd_soc_card *card)
{
	struct machine_data *mdata =
		container_of(card, struct machine_data, card);
	struct ccsr_guts_85xx __iomem *guts;

	guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
	if (!guts) {
		dev_err(card->dev, "could not map global utilities\n");
		return -ENOMEM;
	}

	/* Enable SSI Tx signal */
	clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
			CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI);

	/* Enable SSI Rx signal */
	clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
			CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI);

	/* Enable DMA Channel for SSI */
	guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0],
			CCSR_GUTS_DMUXCR_SSI);

	guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1],
			CCSR_GUTS_DMUXCR_SSI);

	iounmap(guts);

	return 0;
}

/**
 * p1022_ds_startup: program the board with various hardware parameters
 *
 * This function takes board-specific information, like clock frequencies
 * and serial data formats, and passes that information to the codec and
 * transport drivers.
 */
static int p1022_ds_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct machine_data *mdata =
		container_of(rtd->card, struct machine_data, card);
	struct device *dev = rtd->card->dev;
	int ret = 0;

	/* Tell the codec driver what the serial protocol is. */
	ret = snd_soc_dai_set_fmt(rtd->codec_dai, mdata->dai_format);
	if (ret < 0) {
		dev_err(dev, "could not set codec driver audio format\n");
		return ret;
	}

	/*
	 * Tell the codec driver what the MCLK frequency is, and whether it's
	 * a slave or master.
	 */
	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0, mdata->clk_frequency,
				     mdata->codec_clk_direction);
	if (ret < 0) {
		dev_err(dev, "could not set codec driver clock params\n");
		return ret;
	}

	return 0;
}

/**
 * p1022_ds_machine_remove: Remove the sound device
 *
 * This function is called to remove the sound device for one SSI.  We
 * de-program the DMACR and PMUXCR register.
 */
static int p1022_ds_machine_remove(struct snd_soc_card *card)
{
	struct machine_data *mdata =
		container_of(card, struct machine_data, card);
	struct ccsr_guts_85xx __iomem *guts;

	guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
	if (!guts) {
		dev_err(card->dev, "could not map global utilities\n");
		return -ENOMEM;
	}

	/* Restore the signal routing */
	clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
	clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
	guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0], 0);
	guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1], 0);

	iounmap(guts);

	return 0;
}

/**
 * p1022_ds_ops: ASoC machine driver operations
 */
static struct snd_soc_ops p1022_ds_ops = {
	.startup = p1022_ds_startup,
};

/**
 * p1022_ds_probe: platform probe function for the machine driver
 *
 * Although this is a machine driver, the SSI node is the "master" node with
 * respect to audio hardware connections.  Therefore, we create a new ASoC
 * device for each new SSI node that has a codec attached.
 */
static int p1022_ds_probe(struct platform_device *pdev)
{
	struct device *dev = pdev->dev.parent;
	/* ssi_pdev is the platform device for the SSI node that probed us */
	struct platform_device *ssi_pdev =
		container_of(dev, struct platform_device, dev);
	struct device_node *np = ssi_pdev->dev.of_node;
	struct device_node *codec_np = NULL;
	struct platform_device *sound_device = NULL;
	struct machine_data *mdata;
	int ret = -ENODEV;
	const char *sprop;
	const u32 *iprop;

	/* Find the codec node for this SSI. */
	codec_np = of_parse_phandle(np, "codec-handle", 0);
	if (!codec_np) {
		dev_err(dev, "could not find codec node\n");
		return -EINVAL;
	}

	mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
	if (!mdata) {
		ret = -ENOMEM;
		goto error_put;
	}

	mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
	mdata->dai[0].ops = &p1022_ds_ops;

	/* Determine the codec name, it will be used as the codec DAI name */
	ret = fsl_asoc_get_codec_dev_name(codec_np, mdata->codec_name,
					  DAI_NAME_SIZE);
	if (ret) {
		dev_err(&pdev->dev, "invalid codec node %s\n",
			codec_np->full_name);
		ret = -EINVAL;
		goto error;
	}
	mdata->dai[0].codec_name = mdata->codec_name;

	/* We register two DAIs per SSI, one for playback and the other for
	 * capture.  We support codecs that have separate DAIs for both playback
	 * and capture.
	 */
	memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));

	/* The DAI names from the codec (snd_soc_dai_driver.name) */
	mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
	mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";

	/* Get the device ID */
	iprop = of_get_property(np, "cell-index", NULL);
	if (!iprop) {
		dev_err(&pdev->dev, "cell-index property not found\n");
		ret = -EINVAL;
		goto error;
	}
	mdata->ssi_id = be32_to_cpup(iprop);

	/* Get the serial format and clock direction. */
	sprop = of_get_property(np, "fsl,mode", NULL);
	if (!sprop) {
		dev_err(&pdev->dev, "fsl,mode property not found\n");
		ret = -EINVAL;
		goto error;
	}

	if (strcasecmp(sprop, "i2s-slave") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
		mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;

		/* In i2s-slave mode, the codec has its own clock source, so we
		 * need to get the frequency from the device tree and pass it to
		 * the codec driver.
		 */
		iprop = of_get_property(codec_np, "clock-frequency", NULL);
		if (!iprop || !*iprop) {
			dev_err(&pdev->dev, "codec bus-frequency "
				"property is missing or invalid\n");
			ret = -EINVAL;
			goto error;
		}
		mdata->clk_frequency = be32_to_cpup(iprop);
	} else if (strcasecmp(sprop, "i2s-master") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
		mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "lj-slave") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM;
		mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "lj-master") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS;
		mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "rj-slave") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM;
		mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "rj-master") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS;
		mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "ac97-slave") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM;
		mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "ac97-master") == 0) {
		mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS;
		mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
		mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else {
		dev_err(&pdev->dev,
			"unrecognized fsl,mode property '%s'\n", sprop);
		ret = -EINVAL;
		goto error;
	}

	if (!mdata->clk_frequency) {
		dev_err(&pdev->dev, "unknown clock frequency\n");
		ret = -EINVAL;
		goto error;
	}

	/* Find the playback DMA channel to use. */
	mdata->dai[0].platform_name = mdata->platform_name[0];
	ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
				       &mdata->dma_channel_id[0],
				       &mdata->dma_id[0]);
	if (ret) {
		dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
		goto error;
	}

	/* Find the capture DMA channel to use. */
	mdata->dai[1].platform_name = mdata->platform_name[1];
	ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
				       &mdata->dma_channel_id[1],
				       &mdata->dma_id[1]);
	if (ret) {
		dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
		goto error;
	}

	/* Initialize our DAI data structure.  */
	mdata->dai[0].stream_name = "playback";
	mdata->dai[1].stream_name = "capture";
	mdata->dai[0].name = mdata->dai[0].stream_name;
	mdata->dai[1].name = mdata->dai[1].stream_name;

	mdata->card.probe = p1022_ds_machine_probe;
	mdata->card.remove = p1022_ds_machine_remove;
	mdata->card.name = pdev->name; /* The platform driver name */
	mdata->card.num_links = 2;
	mdata->card.dai_link = mdata->dai;

	/* Allocate a new audio platform device structure */
	sound_device = platform_device_alloc("soc-audio", -1);
	if (!sound_device) {
		dev_err(&pdev->dev, "platform device alloc failed\n");
		ret = -ENOMEM;
		goto error;
	}

	/* Associate the card data with the sound device */
	platform_set_drvdata(sound_device, &mdata->card);

	/* Register with ASoC */
	ret = platform_device_add(sound_device);
	if (ret) {
		dev_err(&pdev->dev, "platform device add failed\n");
		goto error;
	}
	dev_set_drvdata(&pdev->dev, sound_device);

	of_node_put(codec_np);

	return 0;

error:
	if (sound_device)
		platform_device_put(sound_device);

	kfree(mdata);
error_put:
	of_node_put(codec_np);
	return ret;
}

/**
 * p1022_ds_remove: remove the platform device
 *
 * This function is called when the platform device is removed.
 */
static int __devexit p1022_ds_remove(struct platform_device *pdev)
{
	struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
	struct snd_soc_card *card = platform_get_drvdata(sound_device);
	struct machine_data *mdata =
		container_of(card, struct machine_data, card);

	platform_device_unregister(sound_device);

	kfree(mdata);
	sound_device->dev.platform_data = NULL;

	dev_set_drvdata(&pdev->dev, NULL);

	return 0;
}

static struct platform_driver p1022_ds_driver = {
	.probe = p1022_ds_probe,
	.remove = __devexit_p(p1022_ds_remove),
	.driver = {
		/*
		 * The name must match 'compatible' property in the device tree,
		 * in lowercase letters.
		 */
		.name = "snd-soc-p1022ds",
		.owner = THIS_MODULE,
	},
};

/**
 * p1022_ds_init: machine driver initialization.
 *
 * This function is called when this module is loaded.
 */
static int __init p1022_ds_init(void)
{
	struct device_node *guts_np;
	struct resource res;

	/* Get the physical address of the global utilities registers */
	guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
	if (of_address_to_resource(guts_np, 0, &res)) {
		pr_err("snd-soc-p1022ds: missing/invalid global utils node\n");
		of_node_put(guts_np);
		return -EINVAL;
	}
	guts_phys = res.start;
	of_node_put(guts_np);

	return platform_driver_register(&p1022_ds_driver);
}

/**
 * p1022_ds_exit: machine driver exit
 *
 * This function is called when this driver is unloaded.
 */
static void __exit p1022_ds_exit(void)
{
	platform_driver_unregister(&p1022_ds_driver);
}

module_init(p1022_ds_init);
module_exit(p1022_ds_exit);

MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
27ef3744 TT	1	/**
	2	* Freescale P1022DS ALSA SoC Machine driver
	3	*
	4	* Author: Timur Tabi <timur@freescale.com>
	5	*
	6	* Copyright 2010 Freescale Semiconductor, Inc.
	7	*
	8	* This file is licensed under the terms of the GNU General Public License
	9	* version 2. This program is licensed "as is" without any warranty of any
	10	* kind, whether express or implied.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/of_device.h>
	16	#include <linux/slab.h>
	17	#include <sound/soc.h>
	18	#include <asm/fsl_guts.h>
	19
	20	#include "fsl_dma.h"
	21	#include "fsl_ssi.h"
60aae8da	22	#include "fsl_utils.h"
27ef3744 TT	23
	24	/* P1022-specific PMUXCR and DMUXCR bit definitions */
	25
	26	#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK 0x0001c000
	27	#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI 0x00010000
	28	#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI 0x00018000
	29
	30	#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK 0x00000c00
	31	#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI 0x00000000
	32
	33	#define CCSR_GUTS_DMUXCR_PAD 1 /* DMA controller/channel set to pad */
	34	#define CCSR_GUTS_DMUXCR_SSI 2 /* DMA controller/channel set to SSI */
	35
	36	/*
	37	* Set the DMACR register in the GUTS
	38	*
	39	* The DMACR register determines the source of initiated transfers for each
	40	* channel on each DMA controller. Rather than have a bunch of repetitive
	41	* macros for the bit patterns, we just have a function that calculates
	42	* them.
	43	*
	44	* guts: Pointer to GUTS structure
	45	* co: The DMA controller (0 or 1)
	46	* ch: The channel on the DMA controller (0, 1, 2, or 3)
	47	* device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
	48	*/
	49	static inline void guts_set_dmuxcr(struct ccsr_guts_85xx __iomem *guts,
	50	unsigned int co, unsigned int ch, unsigned int device)
	51	{
	52	unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));
	53
	54	clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
	55	}
	56
	57	/* There's only one global utilities register */
	58	static phys_addr_t guts_phys;
	59
27ef3744 TT	60	/**
	61	* machine_data: machine-specific ASoC device data
	62	*
	63	* This structure contains data for a single sound platform device on an
	64	* P1022 DS. Some of the data is taken from the device tree.
	65	*/
	66	struct machine_data {
	67	struct snd_soc_dai_link dai[2];
	68	struct snd_soc_card card;
	69	unsigned int dai_format;
	70	unsigned int codec_clk_direction;
	71	unsigned int cpu_clk_direction;
	72	unsigned int clk_frequency;
	73	unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */
	74	unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */
	75	unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
	76	char codec_name[DAI_NAME_SIZE];
	77	char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
	78	};
	79
	80	/**
	81	* p1022_ds_machine_probe: initialize the board
	82	*
	83	* This function is used to initialize the board-specific hardware.
	84	*
	85	* Here we program the DMACR and PMUXCR registers.
	86	*/
e7361ec4	87	static int p1022_ds_machine_probe(struct snd_soc_card *card)
27ef3744	88	{
27ef3744 TT	89	struct machine_data *mdata =
	90	container_of(card, struct machine_data, card);
	91	struct ccsr_guts_85xx __iomem *guts;
	92
	93	guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
	94	if (!guts) {
	95	dev_err(card->dev, "could not map global utilities\n");
	96	return -ENOMEM;
	97	}
	98
	99	/* Enable SSI Tx signal */
	100	clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
	101	CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI);
	102
	103	/* Enable SSI Rx signal */
	104	clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
	105	CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI);
	106
	107	/* Enable DMA Channel for SSI */
	108	guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0],
	109	CCSR_GUTS_DMUXCR_SSI);
	110
	111	guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1],
	112	CCSR_GUTS_DMUXCR_SSI);
	113
	114	iounmap(guts);
	115
	116	return 0;
	117	}
	118
	119	/**
	120	* p1022_ds_startup: program the board with various hardware parameters
	121	*
	122	* This function takes board-specific information, like clock frequencies
	123	* and serial data formats, and passes that information to the codec and
	124	* transport drivers.
	125	*/
	126	static int p1022_ds_startup(struct snd_pcm_substream *substream)
	127	{
	128	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	129	struct machine_data *mdata =
	130	container_of(rtd->card, struct machine_data, card);
	131	struct device *dev = rtd->card->dev;
	132	int ret = 0;
	133
	134	/* Tell the codec driver what the serial protocol is. */
	135	ret = snd_soc_dai_set_fmt(rtd->codec_dai, mdata->dai_format);
	136	if (ret < 0) {
	137	dev_err(dev, "could not set codec driver audio format\n");
	138	return ret;
	139	}
	140
	141	/*
	142	* Tell the codec driver what the MCLK frequency is, and whether it's
	143	* a slave or master.
	144	*/
	145	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0, mdata->clk_frequency,
	146	mdata->codec_clk_direction);
	147	if (ret < 0) {
	148	dev_err(dev, "could not set codec driver clock params\n");
	149	return ret;
	150	}
	151
	152	return 0;
153	}
154
155	/**
156	* p1022_ds_machine_remove: Remove the sound device
157	*
158	* This function is called to remove the sound device for one SSI. We
159	* de-program the DMACR and PMUXCR register.
160	*/
e7361ec4	161	static int p1022_ds_machine_remove(struct snd_soc_card *card)
27ef3744	162	{
27ef3744 TT	163	struct machine_data *mdata =
	164	container_of(card, struct machine_data, card);
	165	struct ccsr_guts_85xx __iomem *guts;
	166
	167	guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
	168	if (!guts) {
	169	dev_err(card->dev, "could not map global utilities\n");
	170	return -ENOMEM;
	171	}
	172
	173	/* Restore the signal routing */
	174	clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
	175	clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
	176	guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0], 0);
	177	guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1], 0);
	178
	179	iounmap(guts);
	180
	181	return 0;
	182	}
	183
	184	/**
	185	* p1022_ds_ops: ASoC machine driver operations
	186	*/
	187	static struct snd_soc_ops p1022_ds_ops = {
	188	.startup = p1022_ds_startup,
	189	};
	190
27ef3744 TT	191	/**
	192	* p1022_ds_probe: platform probe function for the machine driver
	193	*
	194	* Although this is a machine driver, the SSI node is the "master" node with
	195	* respect to audio hardware connections. Therefore, we create a new ASoC
	196	* device for each new SSI node that has a codec attached.
	197	*/
	198	static int p1022_ds_probe(struct platform_device *pdev)
	199	{
	200	struct device *dev = pdev->dev.parent;
	201	/* ssi_pdev is the platform device for the SSI node that probed us */
	202	struct platform_device *ssi_pdev =
	203	container_of(dev, struct platform_device, dev);
	204	struct device_node *np = ssi_pdev->dev.of_node;
	205	struct device_node *codec_np = NULL;
	206	struct platform_device *sound_device = NULL;
	207	struct machine_data *mdata;
	208	int ret = -ENODEV;
	209	const char *sprop;
	210	const u32 *iprop;
	211
	212	/* Find the codec node for this SSI. */
	213	codec_np = of_parse_phandle(np, "codec-handle", 0);
	214	if (!codec_np) {
	215	dev_err(dev, "could not find codec node\n");
	216	return -EINVAL;
	217	}
	218
	219	mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
880b8ffd JL	220	if (!mdata) {
	221	ret = -ENOMEM;
	222	goto error_put;
	223	}
27ef3744 TT	224
	225	mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
	226	mdata->dai[0].ops = &p1022_ds_ops;
	227
	228	/* Determine the codec name, it will be used as the codec DAI name */
60aae8da SG	229	ret = fsl_asoc_get_codec_dev_name(codec_np, mdata->codec_name,
60aae8da SG	230	DAI_NAME_SIZE);
27ef3744 TT	231	if (ret) {
	232	dev_err(&pdev->dev, "invalid codec node %s\n",
	233	codec_np->full_name);
	234	ret = -EINVAL;
	235	goto error;
	236	}
	237	mdata->dai[0].codec_name = mdata->codec_name;
	238
	239	/* We register two DAIs per SSI, one for playback and the other for
	240	* capture. We support codecs that have separate DAIs for both playback
	241	* and capture.
	242	*/
	243	memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
	244
	245	/* The DAI names from the codec (snd_soc_dai_driver.name) */
	246	mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
	247	mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";
	248
	249	/* Get the device ID */
	250	iprop = of_get_property(np, "cell-index", NULL);
	251	if (!iprop) {
	252	dev_err(&pdev->dev, "cell-index property not found\n");
	253	ret = -EINVAL;
	254	goto error;
	255	}
147dfe90	256	mdata->ssi_id = be32_to_cpup(iprop);
27ef3744 TT	257
	258	/* Get the serial format and clock direction. */
	259	sprop = of_get_property(np, "fsl,mode", NULL);
	260	if (!sprop) {
	261	dev_err(&pdev->dev, "fsl,mode property not found\n");
	262	ret = -EINVAL;
	263	goto error;
	264	}
	265
	266	if (strcasecmp(sprop, "i2s-slave") == 0) {
70ac07bb TT	267	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	268	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	269	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	270	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	271
	272	/* In i2s-slave mode, the codec has its own clock source, so we
	273	* need to get the frequency from the device tree and pass it to
	274	* the codec driver.
	275	*/
	276	iprop = of_get_property(codec_np, "clock-frequency", NULL);
	277	if (!iprop \|\| !*iprop) {
	278	dev_err(&pdev->dev, "codec bus-frequency "
	279	"property is missing or invalid\n");
	280	ret = -EINVAL;
	281	goto error;
	282	}
147dfe90	283	mdata->clk_frequency = be32_to_cpup(iprop);
27ef3744	284	} else if (strcasecmp(sprop, "i2s-master") == 0) {
70ac07bb TT	285	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	286	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS;
27ef3744 TT	287	mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
	288	mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	289	} else if (strcasecmp(sprop, "lj-slave") == 0) {
70ac07bb TT	290	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	291	SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	292	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	293	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	294	} else if (strcasecmp(sprop, "lj-master") == 0) {
70ac07bb TT	295	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	296	SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_CBS_CFS;
27ef3744 TT	297	mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
	298	mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	299	} else if (strcasecmp(sprop, "rj-slave") == 0) {
70ac07bb TT	300	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	301	SND_SOC_DAIFMT_RIGHT_J \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	302	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	303	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	304	} else if (strcasecmp(sprop, "rj-master") == 0) {
70ac07bb TT	305	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	306	SND_SOC_DAIFMT_RIGHT_J \| SND_SOC_DAIFMT_CBS_CFS;
27ef3744 TT	307	mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
	308	mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	309	} else if (strcasecmp(sprop, "ac97-slave") == 0) {
70ac07bb TT	310	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	311	SND_SOC_DAIFMT_AC97 \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	312	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	313	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	314	} else if (strcasecmp(sprop, "ac97-master") == 0) {
70ac07bb TT	315	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	316	SND_SOC_DAIFMT_AC97 \| SND_SOC_DAIFMT_CBS_CFS;
27ef3744 TT	317	mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
	318	mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	319	} else {
	320	dev_err(&pdev->dev,
	321	"unrecognized fsl,mode property '%s'\n", sprop);
	322	ret = -EINVAL;
	323	goto error;
	324	}
	325
	326	if (!mdata->clk_frequency) {
	327	dev_err(&pdev->dev, "unknown clock frequency\n");
	328	ret = -EINVAL;
	329	goto error;
	330	}
	331
	332	/* Find the playback DMA channel to use. */
	333	mdata->dai[0].platform_name = mdata->platform_name[0];
60aae8da SG	334	ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
	335	&mdata->dma_channel_id[0],
	336	&mdata->dma_id[0]);
27ef3744 TT	337	if (ret) {
	338	dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
	339	goto error;
	340	}
	341
	342	/* Find the capture DMA channel to use. */
	343	mdata->dai[1].platform_name = mdata->platform_name[1];
60aae8da SG	344	ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
	345	&mdata->dma_channel_id[1],
	346	&mdata->dma_id[1]);
27ef3744 TT	347	if (ret) {
	348	dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
	349	goto error;
	350	}
	351
	352	/* Initialize our DAI data structure. */
	353	mdata->dai[0].stream_name = "playback";
	354	mdata->dai[1].stream_name = "capture";
	355	mdata->dai[0].name = mdata->dai[0].stream_name;
	356	mdata->dai[1].name = mdata->dai[1].stream_name;
	357
	358	mdata->card.probe = p1022_ds_machine_probe;
	359	mdata->card.remove = p1022_ds_machine_remove;
	360	mdata->card.name = pdev->name; /* The platform driver name */
	361	mdata->card.num_links = 2;
	362	mdata->card.dai_link = mdata->dai;
	363
	364	/* Allocate a new audio platform device structure */
	365	sound_device = platform_device_alloc("soc-audio", -1);
	366	if (!sound_device) {
	367	dev_err(&pdev->dev, "platform device alloc failed\n");
	368	ret = -ENOMEM;
	369	goto error;
	370	}
	371
	372	/* Associate the card data with the sound device */
	373	platform_set_drvdata(sound_device, &mdata->card);
	374
	375	/* Register with ASoC */
	376	ret = platform_device_add(sound_device);
	377	if (ret) {
	378	dev_err(&pdev->dev, "platform device add failed\n");
	379	goto error;
	380	}
39a54555	381	dev_set_drvdata(&pdev->dev, sound_device);
27ef3744 TT	382
	383	of_node_put(codec_np);
	384
	385	return 0;
	386
	387	error:
27ef3744	388	if (sound_device)
d890a1a4	389	platform_device_put(sound_device);
27ef3744 TT	390
27ef3744 TT	391	kfree(mdata);
880b8ffd JL	392	error_put:
880b8ffd JL	393	of_node_put(codec_np);
27ef3744 TT	394	return ret;
	395	}
	396
	397	/**
	398	* p1022_ds_remove: remove the platform device
	399	*
	400	* This function is called when the platform device is removed.
	401	*/
	402	static int __devexit p1022_ds_remove(struct platform_device *pdev)
	403	{
	404	struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
	405	struct snd_soc_card *card = platform_get_drvdata(sound_device);
	406	struct machine_data *mdata =
	407	container_of(card, struct machine_data, card);
	408
	409	platform_device_unregister(sound_device);
	410
	411	kfree(mdata);
	412	sound_device->dev.platform_data = NULL;
	413
	414	dev_set_drvdata(&pdev->dev, NULL);
	415
	416	return 0;
	417	}
	418
	419	static struct platform_driver p1022_ds_driver = {
	420	.probe = p1022_ds_probe,
	421	.remove = __devexit_p(p1022_ds_remove),
	422	.driver = {
2b81ec69 SG	423	/*
	424	* The name must match 'compatible' property in the device tree,
	425	* in lowercase letters.
	426	*/
	427	.name = "snd-soc-p1022ds",
27ef3744 TT	428	.owner = THIS_MODULE,
	429	},
	430	};
	431
	432	/**
	433	* p1022_ds_init: machine driver initialization.
	434	*
	435	* This function is called when this module is loaded.
	436	*/
	437	static int __init p1022_ds_init(void)
	438	{
	439	struct device_node *guts_np;
	440	struct resource res;
27ef3744 TT	441
	442	/* Get the physical address of the global utilities registers */
	443	guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
	444	if (of_address_to_resource(guts_np, 0, &res)) {
a806aa92 TT	445	pr_err("snd-soc-p1022ds: missing/invalid global utils node\n");
a806aa92 TT	446	of_node_put(guts_np);
27ef3744 TT	447	return -EINVAL;
	448	}
	449	guts_phys = res.start;
	450	of_node_put(guts_np);
	451
	452	return platform_driver_register(&p1022_ds_driver);
	453	}
	454
	455	/**
	456	* p1022_ds_exit: machine driver exit
	457	*
	458	* This function is called when this driver is unloaded.
	459	*/
	460	static void __exit p1022_ds_exit(void)
	461	{
	462	platform_driver_unregister(&p1022_ds_driver);
	463	}
	464
	465	module_init(p1022_ds_init);
	466	module_exit(p1022_ds_exit);
	467
	468	MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
	469	MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
	470	MODULE_LICENSE("GPL v2");