[deliverable/linux.git] / sound / soc / fsl / mpc8610_hpcd.c

/**
 * Freescale MPC8610HPCD ALSA SoC Machine driver
 *
 * Author: Timur Tabi <timur@freescale.com>
 *
 * Copyright 2007-2010 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/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(rtd->codec_dai, 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(rtd->codec_dai, 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 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;
	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;
	}

	machine_data->dai[0].cpu_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].codec_of_node = codec_np;

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