[mirror_ubuntu-hirsute-kernel.git] / sound / soc / fsl / mpc8610_hpcd.c

// SPDX-License-Identifier: GPL-2.0
//
// Freescale MPC8610HPCD ALSA SoC Machine driver
//
// Author: Timur Tabi <timur@freescale.com>
//
// Copyright 2007-2010 Freescale Semiconductor, Inc.

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/fsl/guts.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"

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

/**
 * mpc8610_hpcd_data: machine-specific ASoC device data
 *
 * This structure contains data for a single sound platform device on an
 * MPC8610 HPCD.  Some of the data is taken from the device tree.
 */
struct mpc8610_hpcd_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_dai_name[DAI_NAME_SIZE];
	char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
};

/**
 * mpc8610_hpcd_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 mpc8610_hpcd_machine_probe(struct snd_soc_card *card)
{
	struct mpc8610_hpcd_data *machine_data =
		container_of(card, struct mpc8610_hpcd_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;
	}

	/* Program the signal routing between the SSI and the DMA */
	guts_set_dmacr(guts, machine_data->dma_id[0],
		       machine_data->dma_channel_id[0],
		       CCSR_GUTS_DMACR_DEV_SSI);
	guts_set_dmacr(guts, machine_data->dma_id[1],
		       machine_data->dma_channel_id[1],
		       CCSR_GUTS_DMACR_DEV_SSI);

	guts_set_pmuxcr_dma(guts, machine_data->dma_id[0],
			    machine_data->dma_channel_id[0], 0);
	guts_set_pmuxcr_dma(guts, machine_data->dma_id[1],
			    machine_data->dma_channel_id[1], 0);

	switch (machine_data->ssi_id) {
	case 0:
		clrsetbits_be32(&guts->pmuxcr,
			CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
		break;
	case 1:
		clrsetbits_be32(&guts->pmuxcr,
			CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
		break;
	}

	iounmap(guts);

	return 0;
}

/**
 * mpc8610_hpcd_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 mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct mpc8610_hpcd_data *machine_data =
		container_of(rtd->card, struct mpc8610_hpcd_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(asoc_rtd_to_codec(rtd, 0), machine_data->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(asoc_rtd_to_codec(rtd, 0), 0,
				     machine_data->clk_frequency,
				     machine_data->codec_clk_direction);
	if (ret < 0) {
		dev_err(dev, "could not set codec driver clock params\n");
		return ret;
	}

	return 0;
}

/**
 * mpc8610_hpcd_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 mpc8610_hpcd_machine_remove(struct snd_soc_card *card)
{
	struct mpc8610_hpcd_data *machine_data =
		container_of(card, struct mpc8610_hpcd_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 */

	guts_set_dmacr(guts, machine_data->dma_id[0],
		       machine_data->dma_channel_id[0], 0);
	guts_set_dmacr(guts, machine_data->dma_id[1],
		       machine_data->dma_channel_id[1], 0);

	switch (machine_data->ssi_id) {
	case 0:
		clrsetbits_be32(&guts->pmuxcr,
			CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
		break;
	case 1:
		clrsetbits_be32(&guts->pmuxcr,
			CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
		break;
	}

	iounmap(guts);

	return 0;
}

/**
 * mpc8610_hpcd_ops: ASoC machine driver operations
 */
static const struct snd_soc_ops mpc8610_hpcd_ops = {
	.startup = mpc8610_hpcd_startup,
};

/**
 * mpc8610_hpcd_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 mpc8610_hpcd_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 mpc8610_hpcd_data *machine_data;
	struct snd_soc_dai_link_component *comp;
	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, "invalid codec node\n");
		return -EINVAL;
	}

	machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
	if (!machine_data) {
		ret = -ENOMEM;
		goto error_alloc;
	}

	comp = devm_kzalloc(&pdev->dev, 6 * sizeof(*comp), GFP_KERNEL);
	if (!comp) {
		ret = -ENOMEM;
		goto error_alloc;
	}

	machine_data->dai[0].cpus	= &comp[0];
	machine_data->dai[0].codecs	= &comp[1];
	machine_data->dai[0].platforms	= &comp[2];

	machine_data->dai[0].num_cpus		= 1;
	machine_data->dai[0].num_codecs		= 1;
	machine_data->dai[0].num_platforms	= 1;

	machine_data->dai[1].cpus	= &comp[3];
	machine_data->dai[1].codecs	= &comp[4];
	machine_data->dai[1].platforms	= &comp[5];

	machine_data->dai[1].num_cpus		= 1;
	machine_data->dai[1].num_codecs		= 1;
	machine_data->dai[1].num_platforms	= 1;

	machine_data->dai[0].cpus->dai_name = dev_name(&ssi_pdev->dev);
	machine_data->dai[0].ops = &mpc8610_hpcd_ops;

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

	/* The DAI name from the codec (snd_soc_dai_driver.name) */
	machine_data->dai[0].codecs->dai_name = "cs4270-hifi";

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

	/* 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;
	}
	machine_data->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) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
		machine_data->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;
		}
		machine_data->clk_frequency = be32_to_cpup(iprop);
	} else if (strcasecmp(sprop, "i2s-master") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "lj-slave") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "lj-master") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "rj-slave") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "rj-master") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else if (strcasecmp(sprop, "ac97-slave") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	} else if (strcasecmp(sprop, "ac97-master") == 0) {
		machine_data->dai_format =
			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS;
		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	} else {
		dev_err(&pdev->dev,
			"unrecognized fsl,mode property '%s'\n", sprop);
		ret = -EINVAL;
		goto error;
	}

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

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

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

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

	machine_data->card.probe = mpc8610_hpcd_machine_probe;
	machine_data->card.remove = mpc8610_hpcd_machine_remove;
	machine_data->card.name = pdev->name; /* The platform driver name */
	machine_data->card.owner = THIS_MODULE;
	machine_data->card.dev = &pdev->dev;
	machine_data->card.num_links = 2;
	machine_data->card.dai_link = machine_data->dai;

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

	of_node_put(codec_np);

	return 0;

error:
	kfree(machine_data);
error_alloc:
	of_node_put(codec_np);
	return ret;
}

/**
 * mpc8610_hpcd_remove: remove the platform device
 *
 * This function is called when the platform device is removed.
 */
static int mpc8610_hpcd_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct mpc8610_hpcd_data *machine_data =
		container_of(card, struct mpc8610_hpcd_data, card);

	snd_soc_unregister_card(card);
	kfree(machine_data);

	return 0;
}

static struct platform_driver mpc8610_hpcd_driver = {
	.probe = mpc8610_hpcd_probe,
	.remove = mpc8610_hpcd_remove,
	.driver = {
		/* The name must match 'compatible' property in the device tree,
		 * in lowercase letters.
		 */
		.name = "snd-soc-mpc8610hpcd",
	},
};

/**
 * mpc8610_hpcd_init: machine driver initialization.
 *
 * This function is called when this module is loaded.
 */
static int __init mpc8610_hpcd_init(void)
{
	struct device_node *guts_np;
	struct resource res;

	pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n");

	/* Get the physical address of the global utilities registers */
	guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
	if (of_address_to_resource(guts_np, 0, &res)) {
		pr_err("mpc8610-hpcd: missing/invalid global utilities node\n");
		return -EINVAL;
	}
	guts_phys = res.start;

	return platform_driver_register(&mpc8610_hpcd_driver);
}

/**
 * mpc8610_hpcd_exit: machine driver exit
 *
 * This function is called when this driver is unloaded.
 */
static void __exit mpc8610_hpcd_exit(void)
{
	platform_driver_unregister(&mpc8610_hpcd_driver);
}

module_init(mpc8610_hpcd_init);
module_exit(mpc8610_hpcd_exit);

MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
eed9bb23 AD	1	// SPDX-License-Identifier: GPL-2.0
	2	//
	3	// Freescale MPC8610HPCD ALSA SoC Machine driver
	4	//
	5	// Author: Timur Tabi <timur@freescale.com>
	6	//
	7	// Copyright 2007-2010 Freescale Semiconductor, Inc.
17467f23 TT	8
	9	#include <linux/module.h>
	10	#include <linux/interrupt.h>
94848654	11	#include <linux/fsl/guts.h>
5af50730	12	#include <linux/of_address.h>
17467f23	13	#include <linux/of_device.h>
38fec727	14	#include <linux/slab.h>
17467f23	15	#include <sound/soc.h>
17467f23	16
17467f23 TT	17	#include "fsl_dma.h"
17467f23 TT	18	#include "fsl_ssi.h"
60aae8da	19	#include "fsl_utils.h"
17467f23	20
f0fba2ad LG	21	/* There's only one global utilities register */
	22	static phys_addr_t guts_phys;
	23
17467f23	24	/**
f0fba2ad	25	* mpc8610_hpcd_data: machine-specific ASoC device data
17467f23 TT	26	*
	27	* This structure contains data for a single sound platform device on an
	28	* MPC8610 HPCD. Some of the data is taken from the device tree.
	29	*/
	30	struct mpc8610_hpcd_data {
f0fba2ad LG	31	struct snd_soc_dai_link dai[2];
f0fba2ad LG	32	struct snd_soc_card card;
17467f23 TT	33	unsigned int dai_format;
	34	unsigned int codec_clk_direction;
	35	unsigned int cpu_clk_direction;
	36	unsigned int clk_frequency;
f0fba2ad LG	37	unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */
f0fba2ad LG	38	unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */
17467f23	39	unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
f0fba2ad	40	char codec_dai_name[DAI_NAME_SIZE];
f0fba2ad	41	char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
17467f23 TT	42	};
	43
	44	/**
f0fba2ad	45	* mpc8610_hpcd_machine_probe: initialize the board
17467f23	46	*
f0fba2ad	47	* This function is used to initialize the board-specific hardware.
17467f23 TT	48	*
	49	* Here we program the DMACR and PMUXCR registers.
	50	*/
e7361ec4	51	static int mpc8610_hpcd_machine_probe(struct snd_soc_card *card)
17467f23 TT	52	{
17467f23 TT	53	struct mpc8610_hpcd_data *machine_data =
f0fba2ad	54	container_of(card, struct mpc8610_hpcd_data, card);
9cb6abcb	55	struct ccsr_guts __iomem *guts;
17467f23	56
9cb6abcb	57	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
f0fba2ad LG	58	if (!guts) {
	59	dev_err(card->dev, "could not map global utilities\n");
	60	return -ENOMEM;
	61	}
17467f23	62
f0fba2ad LG	63	/* Program the signal routing between the SSI and the DMA */
	64	guts_set_dmacr(guts, machine_data->dma_id[0],
	65	machine_data->dma_channel_id[0],
	66	CCSR_GUTS_DMACR_DEV_SSI);
	67	guts_set_dmacr(guts, machine_data->dma_id[1],
	68	machine_data->dma_channel_id[1],
	69	CCSR_GUTS_DMACR_DEV_SSI);
	70
	71	guts_set_pmuxcr_dma(guts, machine_data->dma_id[0],
	72	machine_data->dma_channel_id[0], 0);
	73	guts_set_pmuxcr_dma(guts, machine_data->dma_id[1],
	74	machine_data->dma_channel_id[1], 0);
17467f23	75
17467f23 TT	76	switch (machine_data->ssi_id) {
17467f23 TT	77	case 0:
f0fba2ad	78	clrsetbits_be32(&guts->pmuxcr,
17467f23 TT	79	CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
	80	break;
	81	case 1:
f0fba2ad	82	clrsetbits_be32(&guts->pmuxcr,
17467f23 TT	83	CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
	84	break;
	85	}
	86
f0fba2ad LG	87	iounmap(guts);
f0fba2ad LG	88
17467f23 TT	89	return 0;
	90	}
	91
	92	/**
	93	* mpc8610_hpcd_startup: program the board with various hardware parameters
	94	*
	95	* This function takes board-specific information, like clock frequencies
	96	* and serial data formats, and passes that information to the codec and
	97	* transport drivers.
	98	*/
	99	static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
	100	{
	101	struct snd_soc_pcm_runtime *rtd = substream->private_data;
17467f23	102	struct mpc8610_hpcd_data *machine_data =
f0fba2ad LG	103	container_of(rtd->card, struct mpc8610_hpcd_data, card);
f0fba2ad LG	104	struct device *dev = rtd->card->dev;
17467f23 TT	105	int ret = 0;
17467f23 TT	106
17467f23	107	/* Tell the codec driver what the serial protocol is. */
17198ae7	108	ret = snd_soc_dai_set_fmt(asoc_rtd_to_codec(rtd, 0), machine_data->dai_format);
64105cfd	109	if (ret < 0) {
f0fba2ad	110	dev_err(dev, "could not set codec driver audio format\n");
64105cfd	111	return ret;
17467f23 TT	112	}
	113
	114	/*
	115	* Tell the codec driver what the MCLK frequency is, and whether it's
	116	* a slave or master.
	117	*/
17198ae7	118	ret = snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0,
f0fba2ad LG	119	machine_data->clk_frequency,
f0fba2ad LG	120	machine_data->codec_clk_direction);
64105cfd	121	if (ret < 0) {
f0fba2ad	122	dev_err(dev, "could not set codec driver clock params\n");
64105cfd	123	return ret;
17467f23 TT	124	}
	125
	126	return 0;
	127	}
	128
	129	/**
	130	* mpc8610_hpcd_machine_remove: Remove the sound device
	131	*
	132	* This function is called to remove the sound device for one SSI. We
	133	* de-program the DMACR and PMUXCR register.
	134	*/
e7361ec4	135	static int mpc8610_hpcd_machine_remove(struct snd_soc_card *card)
17467f23 TT	136	{
17467f23 TT	137	struct mpc8610_hpcd_data *machine_data =
f0fba2ad	138	container_of(card, struct mpc8610_hpcd_data, card);
9cb6abcb	139	struct ccsr_guts __iomem *guts;
f0fba2ad	140
9cb6abcb	141	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
f0fba2ad LG	142	if (!guts) {
	143	dev_err(card->dev, "could not map global utilities\n");
	144	return -ENOMEM;
	145	}
17467f23 TT	146
	147	/* Restore the signal routing */
	148
f0fba2ad LG	149	guts_set_dmacr(guts, machine_data->dma_id[0],
	150	machine_data->dma_channel_id[0], 0);
	151	guts_set_dmacr(guts, machine_data->dma_id[1],
	152	machine_data->dma_channel_id[1], 0);
17467f23 TT	153
	154	switch (machine_data->ssi_id) {
	155	case 0:
f0fba2ad	156	clrsetbits_be32(&guts->pmuxcr,
17467f23 TT	157	CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
	158	break;
	159	case 1:
f0fba2ad	160	clrsetbits_be32(&guts->pmuxcr,
83544994	161	CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
17467f23 TT	162	break;
	163	}
	164
f0fba2ad LG	165	iounmap(guts);
f0fba2ad LG	166
17467f23 TT	167	return 0;
	168	}
	169
	170	/**
f0fba2ad	171	* mpc8610_hpcd_ops: ASoC machine driver operations
17467f23	172	*/
5ace37bd	173	static const struct snd_soc_ops mpc8610_hpcd_ops = {
17467f23 TT	174	.startup = mpc8610_hpcd_startup,
	175	};
	176
f0fba2ad LG	177	/**
	178	* mpc8610_hpcd_probe: platform probe function for the machine driver
	179	*
	180	* Although this is a machine driver, the SSI node is the "master" node with
	181	* respect to audio hardware connections. Therefore, we create a new ASoC
	182	* device for each new SSI node that has a codec attached.
	183	*/
	184	static int mpc8610_hpcd_probe(struct platform_device *pdev)
	185	{
	186	struct device *dev = pdev->dev.parent;
38fec727	187	/* ssi_pdev is the platform device for the SSI node that probed us */
bb18f097	188	struct platform_device *ssi_pdev = to_platform_device(dev);
38fec727	189	struct device_node *np = ssi_pdev->dev.of_node;
f0fba2ad	190	struct device_node *codec_np = NULL;
17467f23	191	struct mpc8610_hpcd_data *machine_data;
6aa7b409	192	struct snd_soc_dai_link_component *comp;
17467f23	193	int ret = -ENODEV;
f0fba2ad LG	194	const char *sprop;
	195	const u32 *iprop;
	196
7c59bc55 SG	197	/* Find the codec node for this SSI. */
7c59bc55 SG	198	codec_np = of_parse_phandle(np, "codec-handle", 0);
f0fba2ad LG	199	if (!codec_np) {
	200	dev_err(dev, "invalid codec node\n");
	201	return -EINVAL;
	202	}
17467f23 TT	203
17467f23 TT	204	machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
c09f5ca7 JL	205	if (!machine_data) {
	206	ret = -ENOMEM;
	207	goto error_alloc;
	208	}
17467f23	209
6aa7b409 KM	210	comp = devm_kzalloc(&pdev->dev, 6 * sizeof(*comp), GFP_KERNEL);
	211	if (!comp) {
	212	ret = -ENOMEM;
	213	goto error_alloc;
	214	}
	215
	216	machine_data->dai[0].cpus = &comp[0];
	217	machine_data->dai[0].codecs = &comp[1];
	218	machine_data->dai[0].platforms = &comp[2];
	219
	220	machine_data->dai[0].num_cpus = 1;
	221	machine_data->dai[0].num_codecs = 1;
	222	machine_data->dai[0].num_platforms = 1;
	223
	224	machine_data->dai[1].cpus = &comp[3];
	225	machine_data->dai[1].codecs = &comp[4];
	226	machine_data->dai[1].platforms = &comp[5];
	227
	228	machine_data->dai[1].num_cpus = 1;
	229	machine_data->dai[1].num_codecs = 1;
	230	machine_data->dai[1].num_platforms = 1;
	231
	232	machine_data->dai[0].cpus->dai_name = dev_name(&ssi_pdev->dev);
f0fba2ad	233	machine_data->dai[0].ops = &mpc8610_hpcd_ops;
17467f23	234
8f549d7e	235	/* ASoC core can match codec with device node */
6aa7b409	236	machine_data->dai[0].codecs->of_node = codec_np;
17467f23	237
f0fba2ad	238	/* The DAI name from the codec (snd_soc_dai_driver.name) */
6aa7b409	239	machine_data->dai[0].codecs->dai_name = "cs4270-hifi";
17467f23	240
f0fba2ad LG	241	/* We register two DAIs per SSI, one for playback and the other for
	242	* capture. Currently, we only support codecs that have one DAI for
	243	* both playback and capture.
	244	*/
	245	memcpy(&machine_data->dai[1], &machine_data->dai[0],
	246	sizeof(struct snd_soc_dai_link));
17467f23 TT	247
	248	/* Get the device ID */
	249	iprop = of_get_property(np, "cell-index", NULL);
	250	if (!iprop) {
f0fba2ad	251	dev_err(&pdev->dev, "cell-index property not found\n");
17467f23 TT	252	ret = -EINVAL;
	253	goto error;
	254	}
147dfe90	255	machine_data->ssi_id = be32_to_cpup(iprop);
17467f23 TT	256
	257	/* Get the serial format and clock direction. */
	258	sprop = of_get_property(np, "fsl,mode", NULL);
	259	if (!sprop) {
f0fba2ad	260	dev_err(&pdev->dev, "fsl,mode property not found\n");
17467f23 TT	261	ret = -EINVAL;
	262	goto error;
	263	}
	264
	265	if (strcasecmp(sprop, "i2s-slave") == 0) {
380c8830 TT	266	machine_data->dai_format =
380c8830 TT	267	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBM_CFM;
17467f23 TT	268	machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
	269	machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	270
f0fba2ad	271	/* In i2s-slave mode, the codec has its own clock source, so we
17467f23 TT	272	* need to get the frequency from the device tree and pass it to
	273	* the codec driver.
	274	*/
	275	iprop = of_get_property(codec_np, "clock-frequency", NULL);
	276	if (!iprop \|\| !*iprop) {
f0fba2ad LG	277	dev_err(&pdev->dev, "codec bus-frequency "
f0fba2ad LG	278	"property is missing or invalid\n");
17467f23 TT	279	ret = -EINVAL;
	280	goto error;
	281	}
147dfe90	282	machine_data->clk_frequency = be32_to_cpup(iprop);
17467f23	283	} else if (strcasecmp(sprop, "i2s-master") == 0) {
380c8830 TT	284	machine_data->dai_format =
380c8830 TT	285	SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS;
17467f23 TT	286	machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
	287	machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	288	} else if (strcasecmp(sprop, "lj-slave") == 0) {
380c8830 TT	289	machine_data->dai_format =
380c8830 TT	290	SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_CBM_CFM;
17467f23 TT	291	machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
	292	machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	293	} else if (strcasecmp(sprop, "lj-master") == 0) {
380c8830 TT	294	machine_data->dai_format =
380c8830 TT	295	SND_SOC_DAIFMT_LEFT_J \| SND_SOC_DAIFMT_CBS_CFS;
17467f23 TT	296	machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
17467f23 TT	297	machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
e5c21571	298	} else if (strcasecmp(sprop, "rj-slave") == 0) {
380c8830 TT	299	machine_data->dai_format =
380c8830 TT	300	SND_SOC_DAIFMT_RIGHT_J \| SND_SOC_DAIFMT_CBM_CFM;
17467f23 TT	301	machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
	302	machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	303	} else if (strcasecmp(sprop, "rj-master") == 0) {
380c8830 TT	304	machine_data->dai_format =
380c8830 TT	305	SND_SOC_DAIFMT_RIGHT_J \| SND_SOC_DAIFMT_CBS_CFS;
17467f23 TT	306	machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
	307	machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	308	} else if (strcasecmp(sprop, "ac97-slave") == 0) {
380c8830 TT	309	machine_data->dai_format =
380c8830 TT	310	SND_SOC_DAIFMT_AC97 \| SND_SOC_DAIFMT_CBM_CFM;
17467f23 TT	311	machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
	312	machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
	313	} else if (strcasecmp(sprop, "ac97-master") == 0) {
380c8830 TT	314	machine_data->dai_format =
380c8830 TT	315	SND_SOC_DAIFMT_AC97 \| SND_SOC_DAIFMT_CBS_CFS;
17467f23 TT	316	machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
	317	machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
	318	} else {
f0fba2ad LG	319	dev_err(&pdev->dev,
f0fba2ad LG	320	"unrecognized fsl,mode property '%s'\n", sprop);
17467f23 TT	321	ret = -EINVAL;
	322	goto error;
	323	}
	324
	325	if (!machine_data->clk_frequency) {
f0fba2ad	326	dev_err(&pdev->dev, "unknown clock frequency\n");
17467f23 TT	327	ret = -EINVAL;
	328	goto error;
	329	}
	330
f0fba2ad	331	/* Find the playback DMA channel to use. */
6aa7b409	332	machine_data->dai[0].platforms->name = machine_data->platform_name[0];
60aae8da SG	333	ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma",
	334	&machine_data->dai[0],
	335	&machine_data->dma_channel_id[0],
	336	&machine_data->dma_id[0]);
17467f23	337	if (ret) {
f0fba2ad	338	dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
17467f23 TT	339	goto error;
	340	}
	341
f0fba2ad	342	/* Find the capture DMA channel to use. */
6aa7b409	343	machine_data->dai[1].platforms->name = machine_data->platform_name[1];
60aae8da SG	344	ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma",
	345	&machine_data->dai[1],
	346	&machine_data->dma_channel_id[1],
	347	&machine_data->dma_id[1]);
f0fba2ad LG	348	if (ret) {
f0fba2ad LG	349	dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
17467f23 TT	350	goto error;
	351	}
	352
f0fba2ad LG	353	/* Initialize our DAI data structure. */
	354	machine_data->dai[0].stream_name = "playback";
	355	machine_data->dai[1].stream_name = "capture";
	356	machine_data->dai[0].name = machine_data->dai[0].stream_name;
	357	machine_data->dai[1].name = machine_data->dai[1].stream_name;
17467f23	358
f0fba2ad LG	359	machine_data->card.probe = mpc8610_hpcd_machine_probe;
	360	machine_data->card.remove = mpc8610_hpcd_machine_remove;
	361	machine_data->card.name = pdev->name; /* The platform driver name */
13c57e5b TT	362	machine_data->card.owner = THIS_MODULE;
13c57e5b TT	363	machine_data->card.dev = &pdev->dev;
f0fba2ad LG	364	machine_data->card.num_links = 2;
f0fba2ad LG	365	machine_data->card.dai_link = machine_data->dai;
17467f23	366
f0fba2ad	367	/* Register with ASoC */
13c57e5b	368	ret = snd_soc_register_card(&machine_data->card);
17467f23	369	if (ret) {
13c57e5b TT	370	dev_err(&pdev->dev, "could not register card\n");
13c57e5b TT	371	goto error;
17467f23 TT	372	}
17467f23 TT	373
f0fba2ad	374	of_node_put(codec_np);
17467f23 TT	375
	376	return 0;
	377
	378	error:
17467f23	379	kfree(machine_data);
c09f5ca7 JL	380	error_alloc:
c09f5ca7 JL	381	of_node_put(codec_np);
17467f23 TT	382	return ret;
	383	}
	384
	385	/**
f0fba2ad	386	* mpc8610_hpcd_remove: remove the platform device
17467f23	387	*
f0fba2ad	388	* This function is called when the platform device is removed.
17467f23	389	*/
a0a3d518	390	static int mpc8610_hpcd_remove(struct platform_device *pdev)
17467f23	391	{
13c57e5b	392	struct snd_soc_card *card = platform_get_drvdata(pdev);
17467f23	393	struct mpc8610_hpcd_data *machine_data =
f0fba2ad	394	container_of(card, struct mpc8610_hpcd_data, card);
17467f23	395
13c57e5b	396	snd_soc_unregister_card(card);
17467f23	397	kfree(machine_data);
17467f23 TT	398
	399	return 0;
	400	}
	401
f0fba2ad LG	402	static struct platform_driver mpc8610_hpcd_driver = {
f0fba2ad LG	403	.probe = mpc8610_hpcd_probe,
a0a3d518	404	.remove = mpc8610_hpcd_remove,
4018294b	405	.driver = {
2b81ec69	406	/* The name must match 'compatible' property in the device tree,
f0fba2ad LG	407	* in lowercase letters.
	408	*/
	409	.name = "snd-soc-mpc8610hpcd",
4018294b	410	},
17467f23 TT	411	};
	412
	413	/**
f0fba2ad	414	* mpc8610_hpcd_init: machine driver initialization.
17467f23 TT	415	*
	416	* This function is called when this module is loaded.
	417	*/
	418	static int __init mpc8610_hpcd_init(void)
	419	{
f0fba2ad LG	420	struct device_node *guts_np;
f0fba2ad LG	421	struct resource res;
17467f23	422
f0fba2ad	423	pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n");
17467f23	424
f0fba2ad LG	425	/* Get the physical address of the global utilities registers */
	426	guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
	427	if (of_address_to_resource(guts_np, 0, &res)) {
	428	pr_err("mpc8610-hpcd: missing/invalid global utilities node\n");
	429	return -EINVAL;
	430	}
	431	guts_phys = res.start;
17467f23	432
f0fba2ad	433	return platform_driver_register(&mpc8610_hpcd_driver);
17467f23 TT	434	}
	435
	436	/**
f0fba2ad	437	* mpc8610_hpcd_exit: machine driver exit
17467f23 TT	438	*
	439	* This function is called when this driver is unloaded.
	440	*/
	441	static void __exit mpc8610_hpcd_exit(void)
	442	{
f0fba2ad	443	platform_driver_unregister(&mpc8610_hpcd_driver);
17467f23 TT	444	}
	445
	446	module_init(mpc8610_hpcd_init);
	447	module_exit(mpc8610_hpcd_exit);
	448
	449	MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
f0fba2ad LG	450	MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver");
f0fba2ad LG	451	MODULE_LICENSE("GPL v2");