[linux-2.6-block.git] / drivers / input / misc / arizona-haptics.c

/*
 * Arizona haptics driver
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/slab.h>

#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

struct arizona_haptics {
	struct arizona *arizona;
	struct input_dev *input_dev;
	struct work_struct work;

	struct mutex mutex;
	u8 intensity;
};

static void arizona_haptics_work(struct work_struct *work)
{
	struct arizona_haptics *haptics = container_of(work,
						       struct arizona_haptics,
						       work);
	struct arizona *arizona = haptics->arizona;
	struct snd_soc_component *component =
		snd_soc_dapm_to_component(arizona->dapm);
	int ret;

	if (!haptics->arizona->dapm) {
		dev_err(arizona->dev, "No DAPM context\n");
		return;
	}

	if (haptics->intensity) {
		ret = regmap_update_bits(arizona->regmap,
					 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
					 ARIZONA_PHASE2_INTENSITY_MASK,
					 haptics->intensity);
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to set intensity: %d\n",
				ret);
			return;
		}

		/* This enable sequence will be a noop if already enabled */
		ret = regmap_update_bits(arizona->regmap,
					 ARIZONA_HAPTICS_CONTROL_1,
					 ARIZONA_HAP_CTRL_MASK,
					 1 << ARIZONA_HAP_CTRL_SHIFT);
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to start haptics: %d\n",
				ret);
			return;
		}

		ret = snd_soc_component_enable_pin(component, "HAPTICS");
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
				ret);
			return;
		}

		ret = snd_soc_dapm_sync(arizona->dapm);
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
				ret);
			return;
		}
	} else {
		/* This disable sequence will be a noop if already enabled */
		ret = snd_soc_component_disable_pin(component, "HAPTICS");
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
				ret);
			return;
		}

		ret = snd_soc_dapm_sync(arizona->dapm);
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
				ret);
			return;
		}

		ret = regmap_update_bits(arizona->regmap,
					 ARIZONA_HAPTICS_CONTROL_1,
					 ARIZONA_HAP_CTRL_MASK, 0);
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to stop haptics: %d\n",
				ret);
			return;
		}
	}
}

static int arizona_haptics_play(struct input_dev *input, void *data,
				struct ff_effect *effect)
{
	struct arizona_haptics *haptics = input_get_drvdata(input);
	struct arizona *arizona = haptics->arizona;

	if (!arizona->dapm) {
		dev_err(arizona->dev, "No DAPM context\n");
		return -EBUSY;
	}

	if (effect->u.rumble.strong_magnitude) {
		/* Scale the magnitude into the range the device supports */
		if (arizona->pdata.hap_act) {
			haptics->intensity =
				effect->u.rumble.strong_magnitude >> 9;
			if (effect->direction < 0x8000)
				haptics->intensity += 0x7f;
		} else {
			haptics->intensity =
				effect->u.rumble.strong_magnitude >> 8;
		}
	} else {
		haptics->intensity = 0;
	}

	schedule_work(&haptics->work);

	return 0;
}

static void arizona_haptics_close(struct input_dev *input)
{
	struct arizona_haptics *haptics = input_get_drvdata(input);
	struct snd_soc_component *component;

	cancel_work_sync(&haptics->work);

	if (haptics->arizona->dapm) {
		component = snd_soc_dapm_to_component(haptics->arizona->dapm);
		snd_soc_component_disable_pin(component, "HAPTICS");
	}
}

static int arizona_haptics_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	struct arizona_haptics *haptics;
	int ret;

	haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
	if (!haptics)
		return -ENOMEM;

	haptics->arizona = arizona;

	ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
				 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
			ret);
		return ret;
	}

	INIT_WORK(&haptics->work, arizona_haptics_work);

	haptics->input_dev = devm_input_allocate_device(&pdev->dev);
	if (!haptics->input_dev) {
		dev_err(arizona->dev, "Failed to allocate input device\n");
		return -ENOMEM;
	}

	input_set_drvdata(haptics->input_dev, haptics);

	haptics->input_dev->name = "arizona:haptics";
	haptics->input_dev->close = arizona_haptics_close;
	__set_bit(FF_RUMBLE, haptics->input_dev->ffbit);

	ret = input_ff_create_memless(haptics->input_dev, NULL,
				      arizona_haptics_play);
	if (ret < 0) {
		dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
			ret);
		return ret;
	}

	ret = input_register_device(haptics->input_dev);
	if (ret < 0) {
		dev_err(arizona->dev, "couldn't register input device: %d\n",
			ret);
		return ret;
	}

	platform_set_drvdata(pdev, haptics);

	return 0;
}

static struct platform_driver arizona_haptics_driver = {
	.probe		= arizona_haptics_probe,
	.driver		= {
		.name	= "arizona-haptics",
	},
};
module_platform_driver(arizona_haptics_driver);

MODULE_ALIAS("platform:arizona-haptics");
MODULE_DESCRIPTION("Arizona haptics driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
Commit	Line	Data
9dd555e2 MB	1	/*
	2	* Arizona haptics driver
	3	*
	4	* Copyright 2012 Wolfson Microelectronics plc
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/input.h>
	16	#include <linux/slab.h>
	17
	18	#include <sound/soc.h>
	19	#include <sound/soc-dapm.h>
	20
	21	#include <linux/mfd/arizona/core.h>
	22	#include <linux/mfd/arizona/pdata.h>
	23	#include <linux/mfd/arizona/registers.h>
	24
	25	struct arizona_haptics {
	26	struct arizona *arizona;
	27	struct input_dev *input_dev;
	28	struct work_struct work;
	29
	30	struct mutex mutex;
	31	u8 intensity;
	32	};
	33
	34	static void arizona_haptics_work(struct work_struct *work)
	35	{
	36	struct arizona_haptics *haptics = container_of(work,
	37	struct arizona_haptics,
	38	work);
	39	struct arizona *arizona = haptics->arizona;
931afc41 RF	40	struct snd_soc_component *component =
931afc41 RF	41	snd_soc_dapm_to_component(arizona->dapm);
9dd555e2 MB	42	int ret;
	43
	44	if (!haptics->arizona->dapm) {
	45	dev_err(arizona->dev, "No DAPM context\n");
	46	return;
	47	}
	48
	49	if (haptics->intensity) {
	50	ret = regmap_update_bits(arizona->regmap,
	51	ARIZONA_HAPTICS_PHASE_2_INTENSITY,
	52	ARIZONA_PHASE2_INTENSITY_MASK,
	53	haptics->intensity);
	54	if (ret != 0) {
	55	dev_err(arizona->dev, "Failed to set intensity: %d\n",
	56	ret);
	57	return;
	58	}
	59
	60	/* This enable sequence will be a noop if already enabled */
	61	ret = regmap_update_bits(arizona->regmap,
	62	ARIZONA_HAPTICS_CONTROL_1,
	63	ARIZONA_HAP_CTRL_MASK,
	64	1 << ARIZONA_HAP_CTRL_SHIFT);
	65	if (ret != 0) {
	66	dev_err(arizona->dev, "Failed to start haptics: %d\n",
	67	ret);
	68	return;
	69	}
	70
931afc41	71	ret = snd_soc_component_enable_pin(component, "HAPTICS");
9dd555e2 MB	72	if (ret != 0) {
	73	dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
	74	ret);
9dd555e2 MB	75	return;
	76	}
	77
	78	ret = snd_soc_dapm_sync(arizona->dapm);
	79	if (ret != 0) {
	80	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
	81	ret);
9dd555e2 MB	82	return;
9dd555e2 MB	83	}
9dd555e2 MB	84	} else {
9dd555e2 MB	85	/* This disable sequence will be a noop if already enabled */
931afc41	86	ret = snd_soc_component_disable_pin(component, "HAPTICS");
9dd555e2 MB	87	if (ret != 0) {
	88	dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
	89	ret);
9dd555e2 MB	90	return;
	91	}
	92
	93	ret = snd_soc_dapm_sync(arizona->dapm);
	94	if (ret != 0) {
	95	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
	96	ret);
9dd555e2 MB	97	return;
	98	}
	99
9dd555e2 MB	100	ret = regmap_update_bits(arizona->regmap,
9dd555e2 MB	101	ARIZONA_HAPTICS_CONTROL_1,
1cf44efa	102	ARIZONA_HAP_CTRL_MASK, 0);
9dd555e2 MB	103	if (ret != 0) {
	104	dev_err(arizona->dev, "Failed to stop haptics: %d\n",
	105	ret);
	106	return;
	107	}
	108	}
	109	}
	110
	111	static int arizona_haptics_play(struct input_dev input, void data,
	112	struct ff_effect *effect)
	113	{
	114	struct arizona_haptics *haptics = input_get_drvdata(input);
	115	struct arizona *arizona = haptics->arizona;
	116
	117	if (!arizona->dapm) {
	118	dev_err(arizona->dev, "No DAPM context\n");
	119	return -EBUSY;
	120	}
	121
	122	if (effect->u.rumble.strong_magnitude) {
	123	/* Scale the magnitude into the range the device supports */
	124	if (arizona->pdata.hap_act) {
	125	haptics->intensity =
	126	effect->u.rumble.strong_magnitude >> 9;
	127	if (effect->direction < 0x8000)
	128	haptics->intensity += 0x7f;
	129	} else {
	130	haptics->intensity =
	131	effect->u.rumble.strong_magnitude >> 8;
	132	}
	133	} else {
	134	haptics->intensity = 0;
	135	}
	136
	137	schedule_work(&haptics->work);
	138
	139	return 0;
	140	}
	141
	142	static void arizona_haptics_close(struct input_dev *input)
	143	{
	144	struct arizona_haptics *haptics = input_get_drvdata(input);
931afc41	145	struct snd_soc_component *component;
9dd555e2 MB	146
	147	cancel_work_sync(&haptics->work);
	148
931afc41 RF	149	if (haptics->arizona->dapm) {
	150	component = snd_soc_dapm_to_component(haptics->arizona->dapm);
	151	snd_soc_component_disable_pin(component, "HAPTICS");
	152	}
9dd555e2 MB	153	}
	154
	155	static int arizona_haptics_probe(struct platform_device *pdev)
	156	{
	157	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	158	struct arizona_haptics *haptics;
	159	int ret;
	160
	161	haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
	162	if (!haptics)
	163	return -ENOMEM;
	164
	165	haptics->arizona = arizona;
	166
	167	ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
	168	ARIZONA_HAP_ACT, arizona->pdata.hap_act);
	169	if (ret != 0) {
	170	dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
	171	ret);
	172	return ret;
	173	}
	174
	175	INIT_WORK(&haptics->work, arizona_haptics_work);
	176
e75ed3c4 DT	177	haptics->input_dev = devm_input_allocate_device(&pdev->dev);
e75ed3c4 DT	178	if (!haptics->input_dev) {
9dd555e2 MB	179	dev_err(arizona->dev, "Failed to allocate input device\n");
	180	return -ENOMEM;
	181	}
	182
	183	input_set_drvdata(haptics->input_dev, haptics);
	184
	185	haptics->input_dev->name = "arizona:haptics";
9dd555e2 MB	186	haptics->input_dev->close = arizona_haptics_close;
	187	__set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
	188
	189	ret = input_ff_create_memless(haptics->input_dev, NULL,
	190	arizona_haptics_play);
	191	if (ret < 0) {
	192	dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
	193	ret);
e75ed3c4	194	return ret;
9dd555e2 MB	195	}
	196
	197	ret = input_register_device(haptics->input_dev);
	198	if (ret < 0) {
	199	dev_err(arizona->dev, "couldn't register input device: %d\n",
	200	ret);
e75ed3c4	201	return ret;
9dd555e2 MB	202	}
	203
	204	platform_set_drvdata(pdev, haptics);
	205
9dd555e2 MB	206	return 0;
	207	}
	208
	209	static struct platform_driver arizona_haptics_driver = {
	210	.probe = arizona_haptics_probe,
9dd555e2 MB	211	.driver = {
9dd555e2 MB	212	.name = "arizona-haptics",
9dd555e2 MB	213	},
	214	};
	215	module_platform_driver(arizona_haptics_driver);
	216
	217	MODULE_ALIAS("platform:arizona-haptics");
	218	MODULE_DESCRIPTION("Arizona haptics driver");
	219	MODULE_LICENSE("GPL");
	220	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");