[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/fsl/guts.h>
#include <linux/interrupt.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <sound/soc.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 __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 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 __iomem *guts;

	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
	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 __iomem *guts;

	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
	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 = to_platform_device(dev);
	struct device_node *np = ssi_pdev->dev.of_node;
	struct device_node *codec_np = 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;

	/* ASoC core can match codec with device node */
	mdata->dai[0].codec_of_node = codec_np;

	/* 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.owner = THIS_MODULE;
	mdata->card.dev = &pdev->dev;
	mdata->card.num_links = 2;
	mdata->card.dai_link = mdata->dai;

	/* Register with ASoC */
	ret = snd_soc_register_card(&mdata->card);
	if (ret) {
		dev_err(&pdev->dev, "could not register card\n");
		goto error;
	}

	of_node_put(codec_np);

	return 0;

error:
	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 p1022_ds_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct machine_data *mdata =
		container_of(card, struct machine_data, card);

	snd_soc_unregister_card(card);
	kfree(mdata);

	return 0;
}

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

/**
 * 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>
94848654	14	#include <linux/fsl/guts.h>
27ef3744	15	#include <linux/interrupt.h>
5af50730	16	#include <linux/of_address.h>
27ef3744 TT	17	#include <linux/of_device.h>
	18	#include <linux/slab.h>
	19	#include <sound/soc.h>
27ef3744 TT	20
	21	#include "fsl_dma.h"
	22	#include "fsl_ssi.h"
60aae8da	23	#include "fsl_utils.h"
27ef3744 TT	24
	25	/* P1022-specific PMUXCR and DMUXCR bit definitions */
	26
	27	#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK 0x0001c000
	28	#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI 0x00010000
	29	#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI 0x00018000
	30
	31	#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK 0x00000c00
	32	#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI 0x00000000
	33
	34	#define CCSR_GUTS_DMUXCR_PAD 1 /* DMA controller/channel set to pad */
	35	#define CCSR_GUTS_DMUXCR_SSI 2 /* DMA controller/channel set to SSI */
	36
	37	/*
	38	* Set the DMACR register in the GUTS
	39	*
	40	* The DMACR register determines the source of initiated transfers for each
	41	* channel on each DMA controller. Rather than have a bunch of repetitive
	42	* macros for the bit patterns, we just have a function that calculates
	43	* them.
	44	*
	45	* guts: Pointer to GUTS structure
	46	* co: The DMA controller (0 or 1)
	47	* ch: The channel on the DMA controller (0, 1, 2, or 3)
	48	* device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
	49	*/
9cb6abcb	50	static inline void guts_set_dmuxcr(struct ccsr_guts __iomem *guts,
27ef3744 TT	51	unsigned int co, unsigned int ch, unsigned int device)
	52	{
	53	unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));
	54
	55	clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
	56	}
	57
	58	/* There's only one global utilities register */
	59	static phys_addr_t guts_phys;
	60
27ef3744 TT	61	/**
	62	* machine_data: machine-specific ASoC device data
	63	*
	64	* This structure contains data for a single sound platform device on an
	65	* P1022 DS. Some of the data is taken from the device tree.
	66	*/
	67	struct machine_data {
	68	struct snd_soc_dai_link dai[2];
	69	struct snd_soc_card card;
	70	unsigned int dai_format;
	71	unsigned int codec_clk_direction;
	72	unsigned int cpu_clk_direction;
	73	unsigned int clk_frequency;
	74	unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */
	75	unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */
	76	unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
27ef3744 TT	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 =
27ef3744 TT	90	container_of(card, struct machine_data, card);
9cb6abcb	91	struct ccsr_guts __iomem *guts;
27ef3744	92
9cb6abcb	93	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
27ef3744 TT	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 =
27ef3744 TT	164	container_of(card, struct machine_data, card);
9cb6abcb	165	struct ccsr_guts __iomem *guts;
27ef3744	166
9cb6abcb	167	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
27ef3744 TT	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 */
bb18f097	202	struct platform_device *ssi_pdev = to_platform_device(dev);
27ef3744 TT	203	struct device_node *np = ssi_pdev->dev.of_node;
27ef3744 TT	204	struct device_node *codec_np = NULL;
27ef3744 TT	205	struct machine_data *mdata;
	206	int ret = -ENODEV;
	207	const char *sprop;
	208	const u32 *iprop;
	209
	210	/* Find the codec node for this SSI. */
	211	codec_np = of_parse_phandle(np, "codec-handle", 0);
	212	if (!codec_np) {
	213	dev_err(dev, "could not find codec node\n");
	214	return -EINVAL;
	215	}
	216
	217	mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
880b8ffd JL	218	if (!mdata) {
	219	ret = -ENOMEM;
	220	goto error_put;
	221	}
27ef3744 TT	222
	223	mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
	224	mdata->dai[0].ops = &p1022_ds_ops;
	225
8f549d7e SG	226	/* ASoC core can match codec with device node */
8f549d7e SG	227	mdata->dai[0].codec_of_node = codec_np;
27ef3744 TT	228
	229	/* We register two DAIs per SSI, one for playback and the other for
	230	* capture. We support codecs that have separate DAIs for both playback
	231	* and capture.
	232	*/
	233	memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
	234
	235	/* The DAI names from the codec (snd_soc_dai_driver.name) */
	236	mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
	237	mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";
	238
	239	/* Get the device ID */
	240	iprop = of_get_property(np, "cell-index", NULL);
	241	if (!iprop) {
	242	dev_err(&pdev->dev, "cell-index property not found\n");
	243	ret = -EINVAL;
	244	goto error;
	245	}
147dfe90	246	mdata->ssi_id = be32_to_cpup(iprop);
27ef3744 TT	247
	248	/* Get the serial format and clock direction. */
	249	sprop = of_get_property(np, "fsl,mode", NULL);
	250	if (!sprop) {
	251	dev_err(&pdev->dev, "fsl,mode property not found\n");
	252	ret = -EINVAL;
	253	goto error;
	254	}
	255
	256	if (strcasecmp(sprop, "i2s-slave") == 0) {
70ac07bb TT	257	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	258	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	259	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	260	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	261
	262	/* In i2s-slave mode, the codec has its own clock source, so we
	263	* need to get the frequency from the device tree and pass it to
	264	* the codec driver.
	265	*/
	266	iprop = of_get_property(codec_np, "clock-frequency", NULL);
	267	if (!iprop \|\| !*iprop) {
	268	dev_err(&pdev->dev, "codec bus-frequency "
	269	"property is missing or invalid\n");
	270	ret = -EINVAL;
	271	goto error;
	272	}
147dfe90	273	mdata->clk_frequency = be32_to_cpup(iprop);
27ef3744	274	} else if (strcasecmp(sprop, "i2s-master") == 0) {
70ac07bb TT	275	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	276	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS;
27ef3744 TT	277	mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
	278	mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	279	} else if (strcasecmp(sprop, "lj-slave") == 0) {
70ac07bb TT	280	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	281	SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_CBM_CFM;
27ef3744 TT	282	mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
	283	mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
	284	} else if (strcasecmp(sprop, "lj-master") == 0) {
70ac07bb TT	285	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	286	SND_SOC_DAIFMT_LEFT_J \| 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, "rj-slave") == 0) {
70ac07bb TT	290	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	291	SND_SOC_DAIFMT_RIGHT_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, "rj-master") == 0) {
70ac07bb TT	295	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	296	SND_SOC_DAIFMT_RIGHT_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, "ac97-slave") == 0) {
70ac07bb TT	300	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	301	SND_SOC_DAIFMT_AC97 \| 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, "ac97-master") == 0) {
70ac07bb TT	305	mdata->dai_format = SND_SOC_DAIFMT_NB_NF \|
70ac07bb TT	306	SND_SOC_DAIFMT_AC97 \| 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 {
	310	dev_err(&pdev->dev,
	311	"unrecognized fsl,mode property '%s'\n", sprop);
	312	ret = -EINVAL;
	313	goto error;
	314	}
	315
	316	if (!mdata->clk_frequency) {
	317	dev_err(&pdev->dev, "unknown clock frequency\n");
	318	ret = -EINVAL;
	319	goto error;
	320	}
	321
	322	/* Find the playback DMA channel to use. */
	323	mdata->dai[0].platform_name = mdata->platform_name[0];
60aae8da SG	324	ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
	325	&mdata->dma_channel_id[0],
	326	&mdata->dma_id[0]);
27ef3744 TT	327	if (ret) {
	328	dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
	329	goto error;
	330	}
	331
	332	/* Find the capture DMA channel to use. */
	333	mdata->dai[1].platform_name = mdata->platform_name[1];
60aae8da SG	334	ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
	335	&mdata->dma_channel_id[1],
	336	&mdata->dma_id[1]);
27ef3744 TT	337	if (ret) {
	338	dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
	339	goto error;
	340	}
	341
	342	/* Initialize our DAI data structure. */
	343	mdata->dai[0].stream_name = "playback";
	344	mdata->dai[1].stream_name = "capture";
	345	mdata->dai[0].name = mdata->dai[0].stream_name;
	346	mdata->dai[1].name = mdata->dai[1].stream_name;
	347
	348	mdata->card.probe = p1022_ds_machine_probe;
	349	mdata->card.remove = p1022_ds_machine_remove;
	350	mdata->card.name = pdev->name; /* The platform driver name */
13c57e5b TT	351	mdata->card.owner = THIS_MODULE;
13c57e5b TT	352	mdata->card.dev = &pdev->dev;
27ef3744 TT	353	mdata->card.num_links = 2;
	354	mdata->card.dai_link = mdata->dai;
	355
27ef3744	356	/* Register with ASoC */
13c57e5b	357	ret = snd_soc_register_card(&mdata->card);
27ef3744	358	if (ret) {
13c57e5b	359	dev_err(&pdev->dev, "could not register card\n");
27ef3744 TT	360	goto error;
	361	}
	362
	363	of_node_put(codec_np);
	364
	365	return 0;
	366
	367	error:
27ef3744	368	kfree(mdata);
880b8ffd JL	369	error_put:
880b8ffd JL	370	of_node_put(codec_np);
27ef3744 TT	371	return ret;
	372	}
	373
	374	/**
	375	* p1022_ds_remove: remove the platform device
	376	*
	377	* This function is called when the platform device is removed.
	378	*/
a0a3d518	379	static int p1022_ds_remove(struct platform_device *pdev)
27ef3744	380	{
13c57e5b	381	struct snd_soc_card *card = platform_get_drvdata(pdev);
27ef3744 TT	382	struct machine_data *mdata =
	383	container_of(card, struct machine_data, card);
	384
13c57e5b	385	snd_soc_unregister_card(card);
27ef3744	386	kfree(mdata);
27ef3744 TT	387
	388	return 0;
	389	}
	390
	391	static struct platform_driver p1022_ds_driver = {
	392	.probe = p1022_ds_probe,
a0a3d518	393	.remove = p1022_ds_remove,
27ef3744	394	.driver = {
2b81ec69 SG	395	/*
	396	* The name must match 'compatible' property in the device tree,
	397	* in lowercase letters.
	398	*/
	399	.name = "snd-soc-p1022ds",
27ef3744 TT	400	},
	401	};
	402
	403	/**
	404	* p1022_ds_init: machine driver initialization.
	405	*
	406	* This function is called when this module is loaded.
	407	*/
	408	static int __init p1022_ds_init(void)
	409	{
	410	struct device_node *guts_np;
	411	struct resource res;
27ef3744 TT	412
	413	/* Get the physical address of the global utilities registers */
	414	guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
	415	if (of_address_to_resource(guts_np, 0, &res)) {
a806aa92 TT	416	pr_err("snd-soc-p1022ds: missing/invalid global utils node\n");
a806aa92 TT	417	of_node_put(guts_np);
27ef3744 TT	418	return -EINVAL;
	419	}
	420	guts_phys = res.start;
	421	of_node_put(guts_np);
	422
	423	return platform_driver_register(&p1022_ds_driver);
	424	}
	425
	426	/**
	427	* p1022_ds_exit: machine driver exit
	428	*
	429	* This function is called when this driver is unloaded.
	430	*/
	431	static void __exit p1022_ds_exit(void)
	432	{
	433	platform_driver_unregister(&p1022_ds_driver);
	434	}
	435
	436	module_init(p1022_ds_init);
	437	module_exit(p1022_ds_exit);
	438
	439	MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
	440	MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
	441	MODULE_LICENSE("GPL v2");