[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;
	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_dapm_enable_pin(arizona->dapm, "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_dapm_disable_pin(arizona->dapm, "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,
					 1 << ARIZONA_HAP_CTRL_SHIFT);
		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);

	cancel_work_sync(&haptics->work);

	if (haptics->arizona->dapm)
		snd_soc_dapm_disable_pin(haptics->arizona->dapm, "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->dev.parent = pdev->dev.parent;
	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;
9dd555e2 MB	40	int ret;
	41
	42	if (!haptics->arizona->dapm) {
	43	dev_err(arizona->dev, "No DAPM context\n");
	44	return;
	45	}
	46
	47	if (haptics->intensity) {
	48	ret = regmap_update_bits(arizona->regmap,
	49	ARIZONA_HAPTICS_PHASE_2_INTENSITY,
	50	ARIZONA_PHASE2_INTENSITY_MASK,
	51	haptics->intensity);
	52	if (ret != 0) {
	53	dev_err(arizona->dev, "Failed to set intensity: %d\n",
	54	ret);
	55	return;
	56	}
	57
	58	/* This enable sequence will be a noop if already enabled */
	59	ret = regmap_update_bits(arizona->regmap,
	60	ARIZONA_HAPTICS_CONTROL_1,
	61	ARIZONA_HAP_CTRL_MASK,
	62	1 << ARIZONA_HAP_CTRL_SHIFT);
	63	if (ret != 0) {
	64	dev_err(arizona->dev, "Failed to start haptics: %d\n",
	65	ret);
	66	return;
	67	}
	68
9dd555e2 MB	69	ret = snd_soc_dapm_enable_pin(arizona->dapm, "HAPTICS");
	70	if (ret != 0) {
	71	dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
	72	ret);
9dd555e2 MB	73	return;
	74	}
	75
	76	ret = snd_soc_dapm_sync(arizona->dapm);
	77	if (ret != 0) {
	78	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
	79	ret);
9dd555e2 MB	80	return;
9dd555e2 MB	81	}
9dd555e2 MB	82	} else {
9dd555e2 MB	83	/* This disable sequence will be a noop if already enabled */
9dd555e2 MB	84	ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
	85	if (ret != 0) {
	86	dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
	87	ret);
9dd555e2 MB	88	return;
	89	}
	90
	91	ret = snd_soc_dapm_sync(arizona->dapm);
	92	if (ret != 0) {
	93	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
	94	ret);
9dd555e2 MB	95	return;
	96	}
	97
9dd555e2 MB	98	ret = regmap_update_bits(arizona->regmap,
	99	ARIZONA_HAPTICS_CONTROL_1,
	100	ARIZONA_HAP_CTRL_MASK,
	101	1 << ARIZONA_HAP_CTRL_SHIFT);
	102	if (ret != 0) {
	103	dev_err(arizona->dev, "Failed to stop haptics: %d\n",
	104	ret);
	105	return;
	106	}
	107	}
	108	}
	109
	110	static int arizona_haptics_play(struct input_dev input, void data,
	111	struct ff_effect *effect)
	112	{
	113	struct arizona_haptics *haptics = input_get_drvdata(input);
	114	struct arizona *arizona = haptics->arizona;
	115
	116	if (!arizona->dapm) {
	117	dev_err(arizona->dev, "No DAPM context\n");
	118	return -EBUSY;
	119	}
	120
	121	if (effect->u.rumble.strong_magnitude) {
	122	/* Scale the magnitude into the range the device supports */
	123	if (arizona->pdata.hap_act) {
	124	haptics->intensity =
	125	effect->u.rumble.strong_magnitude >> 9;
	126	if (effect->direction < 0x8000)
	127	haptics->intensity += 0x7f;
	128	} else {
	129	haptics->intensity =
	130	effect->u.rumble.strong_magnitude >> 8;
	131	}
	132	} else {
	133	haptics->intensity = 0;
	134	}
	135
	136	schedule_work(&haptics->work);
	137
	138	return 0;
	139	}
	140
	141	static void arizona_haptics_close(struct input_dev *input)
	142	{
	143	struct arizona_haptics *haptics = input_get_drvdata(input);
9dd555e2 MB	144
	145	cancel_work_sync(&haptics->work);
	146
9dd555e2 MB	147	if (haptics->arizona->dapm)
9dd555e2 MB	148	snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
9dd555e2 MB	149	}
	150
	151	static int arizona_haptics_probe(struct platform_device *pdev)
	152	{
	153	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	154	struct arizona_haptics *haptics;
	155	int ret;
	156
	157	haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
	158	if (!haptics)
	159	return -ENOMEM;
	160
	161	haptics->arizona = arizona;
	162
	163	ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
	164	ARIZONA_HAP_ACT, arizona->pdata.hap_act);
	165	if (ret != 0) {
	166	dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
	167	ret);
	168	return ret;
	169	}
	170
	171	INIT_WORK(&haptics->work, arizona_haptics_work);
	172
e75ed3c4 DT	173	haptics->input_dev = devm_input_allocate_device(&pdev->dev);
e75ed3c4 DT	174	if (!haptics->input_dev) {
9dd555e2 MB	175	dev_err(arizona->dev, "Failed to allocate input device\n");
	176	return -ENOMEM;
	177	}
	178
	179	input_set_drvdata(haptics->input_dev, haptics);
	180
	181	haptics->input_dev->name = "arizona:haptics";
	182	haptics->input_dev->dev.parent = pdev->dev.parent;
	183	haptics->input_dev->close = arizona_haptics_close;
	184	__set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
	185
	186	ret = input_ff_create_memless(haptics->input_dev, NULL,
	187	arizona_haptics_play);
	188	if (ret < 0) {
	189	dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
	190	ret);
e75ed3c4	191	return ret;
9dd555e2 MB	192	}
	193
	194	ret = input_register_device(haptics->input_dev);
	195	if (ret < 0) {
	196	dev_err(arizona->dev, "couldn't register input device: %d\n",
	197	ret);
e75ed3c4	198	return ret;
9dd555e2 MB	199	}
	200
	201	platform_set_drvdata(pdev, haptics);
	202
9dd555e2 MB	203	return 0;
	204	}
	205
	206	static struct platform_driver arizona_haptics_driver = {
	207	.probe = arizona_haptics_probe,
9dd555e2 MB	208	.driver = {
9dd555e2 MB	209	.name = "arizona-haptics",
9dd555e2 MB	210	},
	211	};
	212	module_platform_driver(arizona_haptics_driver);
	213
	214	MODULE_ALIAS("platform:arizona-haptics");
	215	MODULE_DESCRIPTION("Arizona haptics driver");
	216	MODULE_LICENSE("GPL");
	217	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");