[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / twl4030-audio.c

/*
 * MFD driver for twl4030 audio submodule, which contains an audio codec, and
 * the vibra control.
 *
 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * Copyright:   (C) 2009 Nokia Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/mfd/twl.h>
#include <linux/mfd/core.h>
#include <linux/mfd/twl4030-audio.h>

#define TWL4030_AUDIO_CELLS	2

static struct platform_device *twl4030_audio_dev;

struct twl4030_audio_resource {
	int request_count;
	u8 reg;
	u8 mask;
};

struct twl4030_audio {
	unsigned int audio_mclk;
	struct mutex mutex;
	struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
	struct mfd_cell cells[TWL4030_AUDIO_CELLS];
};

/*
 * Modify the resource, the function returns the content of the register
 * after the modification.
 */
static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
{
	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
	u8 val;

	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
			audio->resource[id].reg);

	if (enable)
		val |= audio->resource[id].mask;
	else
		val &= ~audio->resource[id].mask;

	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
					val, audio->resource[id].reg);

	return val;
}

static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
{
	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
	u8 val;

	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
			audio->resource[id].reg);

	return val;
}

/*
 * Enable the resource.
 * The function returns with error or the content of the register
 */
int twl4030_audio_enable_resource(enum twl4030_audio_res id)
{
	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
	int val;

	if (id >= TWL4030_AUDIO_RES_MAX) {
		dev_err(&twl4030_audio_dev->dev,
				"Invalid resource ID (%u)\n", id);
		return -EINVAL;
	}

	mutex_lock(&audio->mutex);
	if (!audio->resource[id].request_count)
		/* Resource was disabled, enable it */
		val = twl4030_audio_set_resource(id, 1);
	else
		val = twl4030_audio_get_resource(id);

	audio->resource[id].request_count++;
	mutex_unlock(&audio->mutex);

	return val;
}
EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);

/*
 * Disable the resource.
 * The function returns with error or the content of the register
 */
int twl4030_audio_disable_resource(enum twl4030_audio_res id)
{
	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
	int val;

	if (id >= TWL4030_AUDIO_RES_MAX) {
		dev_err(&twl4030_audio_dev->dev,
				"Invalid resource ID (%u)\n", id);
		return -EINVAL;
	}

	mutex_lock(&audio->mutex);
	if (!audio->resource[id].request_count) {
		dev_err(&twl4030_audio_dev->dev,
			"Resource has been disabled already (%u)\n", id);
		mutex_unlock(&audio->mutex);
		return -EPERM;
	}
	audio->resource[id].request_count--;

	if (!audio->resource[id].request_count)
		/* Resource can be disabled now */
		val = twl4030_audio_set_resource(id, 0);
	else
		val = twl4030_audio_get_resource(id);

	mutex_unlock(&audio->mutex);

	return val;
}
EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);

unsigned int twl4030_audio_get_mclk(void)
{
	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);

	return audio->audio_mclk;
}
EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);

static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
			      struct device_node *parent)
{
	struct device_node *node;

	if (pdata && pdata->codec)
		return true;

	node = of_get_child_by_name(parent, "codec");
	if (node) {
		of_node_put(node);
		return true;
	}

	return false;
}

static bool twl4030_audio_has_vibra(struct twl4030_audio_data *pdata,
			      struct device_node *node)
{
	int vibra;

	if (pdata && pdata->vibra)
		return true;

	if (!of_property_read_u32(node, "ti,enable-vibra", &vibra) && vibra)
		return true;

	return false;
}

static int twl4030_audio_probe(struct platform_device *pdev)
{
	struct twl4030_audio *audio;
	struct twl4030_audio_data *pdata = dev_get_platdata(&pdev->dev);
	struct device_node *node = pdev->dev.of_node;
	struct mfd_cell *cell = NULL;
	int ret, childs = 0;
	u8 val;

	if (!pdata && !node) {
		dev_err(&pdev->dev, "Platform data is missing\n");
		return -EINVAL;
	}

	audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
			     GFP_KERNEL);
	if (!audio)
		return -ENOMEM;

	mutex_init(&audio->mutex);
	audio->audio_mclk = twl_get_hfclk_rate();

	/* Configure APLL_INFREQ and disable APLL if enabled */
	switch (audio->audio_mclk) {
	case 19200000:
		val = TWL4030_APLL_INFREQ_19200KHZ;
		break;
	case 26000000:
		val = TWL4030_APLL_INFREQ_26000KHZ;
		break;
	case 38400000:
		val = TWL4030_APLL_INFREQ_38400KHZ;
		break;
	default:
		dev_err(&pdev->dev, "Invalid audio_mclk\n");
		return -EINVAL;
	}
	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL);

	/* Codec power */
	audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
	audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;

	/* PLL */
	audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
	audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;

	if (twl4030_audio_has_codec(pdata, node)) {
		cell = &audio->cells[childs];
		cell->name = "twl4030-codec";
		if (pdata) {
			cell->platform_data = pdata->codec;
			cell->pdata_size = sizeof(*pdata->codec);
		}
		childs++;
	}
	if (twl4030_audio_has_vibra(pdata, node)) {
		cell = &audio->cells[childs];
		cell->name = "twl4030-vibra";
		if (pdata) {
			cell->platform_data = pdata->vibra;
			cell->pdata_size = sizeof(*pdata->vibra);
		}
		childs++;
	}

	platform_set_drvdata(pdev, audio);
	twl4030_audio_dev = pdev;

	if (childs)
		ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
				      childs, NULL, 0, NULL);
	else {
		dev_err(&pdev->dev, "No platform data found for childs\n");
		ret = -ENODEV;
	}

	if (ret)
		twl4030_audio_dev = NULL;

	return ret;
}

static int twl4030_audio_remove(struct platform_device *pdev)
{
	mfd_remove_devices(&pdev->dev);
	twl4030_audio_dev = NULL;

	return 0;
}

static const struct of_device_id twl4030_audio_of_match[] = {
	{.compatible = "ti,twl4030-audio", },
	{ },
};
MODULE_DEVICE_TABLE(of, twl4030_audio_of_match);

static struct platform_driver twl4030_audio_driver = {
	.driver		= {
		.name	= "twl4030-audio",
		.of_match_table = twl4030_audio_of_match,
	},
	.probe		= twl4030_audio_probe,
	.remove		= twl4030_audio_remove,
};

module_platform_driver(twl4030_audio_driver);

MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("TWL4030 audio block MFD driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl4030-audio");
Commit	Line	Data
0b83ddeb	1	/*
4fe5668b PU	2	* MFD driver for twl4030 audio submodule, which contains an audio codec, and
4fe5668b PU	3	* the vibra control.
0b83ddeb	4	*
4a7c00cd	5	* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
0b83ddeb PU	6	*
	7	* Copyright: (C) 2009 Nokia Corporation
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	21	* 02110-1301 USA
	22	*
	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/types.h>
5a0e3ad6	27	#include <linux/slab.h>
0b83ddeb PU	28	#include <linux/kernel.h>
	29	#include <linux/fs.h>
	30	#include <linux/platform_device.h>
019a7e6b PU	31	#include <linux/of.h>
019a7e6b PU	32	#include <linux/of_platform.h>
a2054256	33	#include <linux/mfd/twl.h>
0b83ddeb	34	#include <linux/mfd/core.h>
57fe7251	35	#include <linux/mfd/twl4030-audio.h>
0b83ddeb	36
4fe5668b	37	#define TWL4030_AUDIO_CELLS 2
0b83ddeb	38
4fe5668b	39	static struct platform_device *twl4030_audio_dev;
0b83ddeb	40
4fe5668b	41	struct twl4030_audio_resource {
0b83ddeb PU	42	int request_count;
	43	u8 reg;
	44	u8 mask;
	45	};
	46
4fe5668b	47	struct twl4030_audio {
f9b4639e	48	unsigned int audio_mclk;
0b83ddeb	49	struct mutex mutex;
57fe7251	50	struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
4fe5668b	51	struct mfd_cell cells[TWL4030_AUDIO_CELLS];
0b83ddeb PU	52	};
	53
	54	/*
	55	* Modify the resource, the function returns the content of the register
	56	* after the modification.
	57	*/
57fe7251	58	static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
0b83ddeb	59	{
4fe5668b	60	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
0b83ddeb PU	61	u8 val;
0b83ddeb PU	62
8bea8672	63	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
4fe5668b	64	audio->resource[id].reg);
0b83ddeb PU	65
0b83ddeb PU	66	if (enable)
4fe5668b	67	val \|= audio->resource[id].mask;
0b83ddeb	68	else
4fe5668b	69	val &= ~audio->resource[id].mask;
0b83ddeb	70
8bea8672	71	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
4fe5668b	72	val, audio->resource[id].reg);
0b83ddeb PU	73
	74	return val;
	75	}
	76
57fe7251	77	static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
0b83ddeb	78	{
4fe5668b	79	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
0b83ddeb PU	80	u8 val;
0b83ddeb PU	81
8bea8672	82	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
4fe5668b	83	audio->resource[id].reg);
0b83ddeb PU	84
	85	return val;
	86	}
	87
	88	/*
	89	* Enable the resource.
	90	* The function returns with error or the content of the register
	91	*/
57fe7251	92	int twl4030_audio_enable_resource(enum twl4030_audio_res id)
0b83ddeb	93	{
4fe5668b	94	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
0b83ddeb PU	95	int val;
0b83ddeb PU	96
57fe7251	97	if (id >= TWL4030_AUDIO_RES_MAX) {
4fe5668b	98	dev_err(&twl4030_audio_dev->dev,
0b83ddeb PU	99	"Invalid resource ID (%u)\n", id);
	100	return -EINVAL;
	101	}
	102
4fe5668b PU	103	mutex_lock(&audio->mutex);
4fe5668b PU	104	if (!audio->resource[id].request_count)
0b83ddeb	105	/* Resource was disabled, enable it */
4fe5668b	106	val = twl4030_audio_set_resource(id, 1);
0b83ddeb	107	else
4fe5668b	108	val = twl4030_audio_get_resource(id);
0b83ddeb	109
4fe5668b PU	110	audio->resource[id].request_count++;
4fe5668b PU	111	mutex_unlock(&audio->mutex);
0b83ddeb PU	112
	113	return val;
	114	}
57fe7251	115	EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
0b83ddeb PU	116
	117	/*
	118	* Disable the resource.
	119	* The function returns with error or the content of the register
	120	*/
6049bcef	121	int twl4030_audio_disable_resource(enum twl4030_audio_res id)
0b83ddeb	122	{
4fe5668b	123	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
0b83ddeb PU	124	int val;
0b83ddeb PU	125
57fe7251	126	if (id >= TWL4030_AUDIO_RES_MAX) {
4fe5668b	127	dev_err(&twl4030_audio_dev->dev,
0b83ddeb PU	128	"Invalid resource ID (%u)\n", id);
	129	return -EINVAL;
	130	}
	131
4fe5668b PU	132	mutex_lock(&audio->mutex);
	133	if (!audio->resource[id].request_count) {
	134	dev_err(&twl4030_audio_dev->dev,
0b83ddeb	135	"Resource has been disabled already (%u)\n", id);
4fe5668b	136	mutex_unlock(&audio->mutex);
0b83ddeb PU	137	return -EPERM;
0b83ddeb PU	138	}
4fe5668b	139	audio->resource[id].request_count--;
0b83ddeb	140
4fe5668b	141	if (!audio->resource[id].request_count)
0b83ddeb	142	/* Resource can be disabled now */
4fe5668b	143	val = twl4030_audio_set_resource(id, 0);
0b83ddeb	144	else
4fe5668b	145	val = twl4030_audio_get_resource(id);
0b83ddeb	146
4fe5668b	147	mutex_unlock(&audio->mutex);
0b83ddeb PU	148
	149	return val;
	150	}
57fe7251	151	EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
0b83ddeb	152
57fe7251	153	unsigned int twl4030_audio_get_mclk(void)
f9b4639e	154	{
4fe5668b	155	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
f9b4639e	156
4fe5668b	157	return audio->audio_mclk;
f9b4639e	158	}
57fe7251	159	EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
f9b4639e	160
019a7e6b	161	static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
0a423772	162	struct device_node *parent)
019a7e6b	163	{
0a423772 JH	164	struct device_node *node;
0a423772 JH	165
019a7e6b PU	166	if (pdata && pdata->codec)
	167	return true;
	168
0a423772 JH	169	node = of_get_child_by_name(parent, "codec");
	170	if (node) {
	171	of_node_put(node);
019a7e6b	172	return true;
0a423772	173	}
019a7e6b PU	174
	175	return false;
	176	}
	177
	178	static bool twl4030_audio_has_vibra(struct twl4030_audio_data *pdata,
	179	struct device_node *node)
	180	{
	181	int vibra;
	182
	183	if (pdata && pdata->vibra)
	184	return true;
	185
	186	if (!of_property_read_u32(node, "ti,enable-vibra", &vibra) && vibra)
	187	return true;
	188
	189	return false;
	190	}
	191
f791be49	192	static int twl4030_audio_probe(struct platform_device *pdev)
0b83ddeb	193	{
4fe5668b	194	struct twl4030_audio *audio;
334a41ce	195	struct twl4030_audio_data *pdata = dev_get_platdata(&pdev->dev);
019a7e6b	196	struct device_node *node = pdev->dev.of_node;
0b83ddeb PU	197	struct mfd_cell *cell = NULL;
0b83ddeb PU	198	int ret, childs = 0;
f9b4639e PU	199	u8 val;
f9b4639e PU	200
019a7e6b	201	if (!pdata && !node) {
f9b4639e PU	202	dev_err(&pdev->dev, "Platform data is missing\n");
	203	return -EINVAL;
	204	}
	205
cdf4b670 PU	206	audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
	207	GFP_KERNEL);
	208	if (!audio)
	209	return -ENOMEM;
	210
	211	mutex_init(&audio->mutex);
c531241d	212	audio->audio_mclk = twl_get_hfclk_rate();
cdf4b670	213
f9b4639e	214	/* Configure APLL_INFREQ and disable APLL if enabled */
cdf4b670	215	switch (audio->audio_mclk) {
f9b4639e	216	case 19200000:
cdf4b670	217	val = TWL4030_APLL_INFREQ_19200KHZ;
f9b4639e PU	218	break;
f9b4639e PU	219	case 26000000:
cdf4b670	220	val = TWL4030_APLL_INFREQ_26000KHZ;
f9b4639e PU	221	break;
f9b4639e PU	222	case 38400000:
cdf4b670	223	val = TWL4030_APLL_INFREQ_38400KHZ;
f9b4639e PU	224	break;
	225	default:
	226	dev_err(&pdev->dev, "Invalid audio_mclk\n");
	227	return -EINVAL;
	228	}
cdf4b670	229	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL);
0b83ddeb PU	230
0b83ddeb PU	231	/* Codec power */
57fe7251 PU	232	audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
57fe7251 PU	233	audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
0b83ddeb PU	234
0b83ddeb PU	235	/* PLL */
57fe7251 PU	236	audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
57fe7251 PU	237	audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
0b83ddeb	238
019a7e6b	239	if (twl4030_audio_has_codec(pdata, node)) {
4fe5668b	240	cell = &audio->cells[childs];
f0fba2ad	241	cell->name = "twl4030-codec";
019a7e6b PU	242	if (pdata) {
	243	cell->platform_data = pdata->codec;
	244	cell->pdata_size = sizeof(*pdata->codec);
	245	}
0b83ddeb PU	246	childs++;
0b83ddeb PU	247	}
019a7e6b	248	if (twl4030_audio_has_vibra(pdata, node)) {
4fe5668b	249	cell = &audio->cells[childs];
f0fba2ad	250	cell->name = "twl4030-vibra";
019a7e6b PU	251	if (pdata) {
	252	cell->platform_data = pdata->vibra;
	253	cell->pdata_size = sizeof(*pdata->vibra);
	254	}
0b83ddeb PU	255	childs++;
	256	}
	257
cdf4b670 PU	258	platform_set_drvdata(pdev, audio);
	259	twl4030_audio_dev = pdev;
	260
0b83ddeb	261	if (childs)
4fe5668b	262	ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
55692af5	263	childs, NULL, 0, NULL);
0b83ddeb PU	264	else {
	265	dev_err(&pdev->dev, "No platform data found for childs\n");
	266	ret = -ENODEV;
	267	}
	268
96ac2d1a	269	if (ret)
39c1421d	270	twl4030_audio_dev = NULL;
0b83ddeb	271
0b83ddeb PU	272	return ret;
	273	}
	274
4740f73f	275	static int twl4030_audio_remove(struct platform_device *pdev)
0b83ddeb	276	{
0b83ddeb	277	mfd_remove_devices(&pdev->dev);
4fe5668b	278	twl4030_audio_dev = NULL;
0b83ddeb PU	279
	280	return 0;
	281	}
	282
019a7e6b PU	283	static const struct of_device_id twl4030_audio_of_match[] = {
	284	{.compatible = "ti,twl4030-audio", },
	285	{ },
	286	};
	287	MODULE_DEVICE_TABLE(of, twl4030_audio_of_match);
	288
4fe5668b	289	static struct platform_driver twl4030_audio_driver = {
0b83ddeb	290	.driver = {
f0fba2ad	291	.name = "twl4030-audio",
019a7e6b	292	.of_match_table = twl4030_audio_of_match,
0b83ddeb	293	},
41569a16	294	.probe = twl4030_audio_probe,
84449216	295	.remove = twl4030_audio_remove,
0b83ddeb PU	296	};
0b83ddeb PU	297
65349d60	298	module_platform_driver(twl4030_audio_driver);
0b83ddeb	299
4a7c00cd	300	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
41569a16	301	MODULE_DESCRIPTION("TWL4030 audio block MFD driver");
0b83ddeb	302	MODULE_LICENSE("GPL");
41569a16	303	MODULE_ALIAS("platform:twl4030-audio");