[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 mutex *dapm_mutex = &arizona->dapm->card->dapm_mutex;
	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;
		}

		mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);

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

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

		mutex_unlock(dapm_mutex);

	} else {
		/* This disable sequence will be a noop if already enabled */
		mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);

		ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
				ret);
			mutex_unlock(dapm_mutex);
			return;
		}

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

		mutex_unlock(dapm_mutex);

		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);
	struct mutex *dapm_mutex = &haptics->arizona->dapm->card->dapm_mutex;

	cancel_work_sync(&haptics->work);

	mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);

	if (haptics->arizona->dapm)
		snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");

	mutex_unlock(dapm_mutex);
}

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 = input_allocate_device();
	if (haptics->input_dev == NULL) {
		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);
		goto err_ialloc;
	}

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

	platform_set_drvdata(pdev, haptics);

	return 0;

err_iff:
	if (haptics->input_dev)
		input_ff_destroy(haptics->input_dev);
err_ialloc:
	input_free_device(haptics->input_dev);

	return ret;
}

static int arizona_haptics_remove(struct platform_device *pdev)
{
	struct arizona_haptics *haptics = platform_get_drvdata(pdev);

	input_unregister_device(haptics->input_dev);

	return 0;
}

static struct platform_driver arizona_haptics_driver = {
	.probe		= arizona_haptics_probe,
	.remove		= arizona_haptics_remove,
	.driver		= {
		.name	= "arizona-haptics",
		.owner	= THIS_MODULE,
	},
};
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;
	40	struct mutex *dapm_mutex = &arizona->dapm->card->dapm_mutex;
	41	int ret;
	42
	43	if (!haptics->arizona->dapm) {
	44	dev_err(arizona->dev, "No DAPM context\n");
	45	return;
	46	}
	47
	48	if (haptics->intensity) {
	49	ret = regmap_update_bits(arizona->regmap,
	50	ARIZONA_HAPTICS_PHASE_2_INTENSITY,
	51	ARIZONA_PHASE2_INTENSITY_MASK,
	52	haptics->intensity);
	53	if (ret != 0) {
	54	dev_err(arizona->dev, "Failed to set intensity: %d\n",
	55	ret);
	56	return;
	57	}
	58
	59	/* This enable sequence will be a noop if already enabled */
	60	ret = regmap_update_bits(arizona->regmap,
	61	ARIZONA_HAPTICS_CONTROL_1,
	62	ARIZONA_HAP_CTRL_MASK,
	63	1 << ARIZONA_HAP_CTRL_SHIFT);
	64	if (ret != 0) {
65	dev_err(arizona->dev, "Failed to start haptics: %d\n",
66	ret);
67	return;
68	}
69
70	mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
71
72	ret = snd_soc_dapm_enable_pin(arizona->dapm, "HAPTICS");
73	if (ret != 0) {
74	dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
75	ret);
76	mutex_unlock(dapm_mutex);
77	return;
78	}
79
80	ret = snd_soc_dapm_sync(arizona->dapm);
81	if (ret != 0) {
82	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
83	ret);
84	mutex_unlock(dapm_mutex);
85	return;
86	}
87
88	mutex_unlock(dapm_mutex);
89
90	} else {
91	/* This disable sequence will be a noop if already enabled */
92	mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
93
94	ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
95	if (ret != 0) {
96	dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
97	ret);
98	mutex_unlock(dapm_mutex);
99	return;
100	}
101
102	ret = snd_soc_dapm_sync(arizona->dapm);
103	if (ret != 0) {
104	dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
105	ret);
106	mutex_unlock(dapm_mutex);
107	return;
108	}
109
110	mutex_unlock(dapm_mutex);
111
112	ret = regmap_update_bits(arizona->regmap,
113	ARIZONA_HAPTICS_CONTROL_1,
114	ARIZONA_HAP_CTRL_MASK,
115	1 << ARIZONA_HAP_CTRL_SHIFT);
116	if (ret != 0) {
117	dev_err(arizona->dev, "Failed to stop haptics: %d\n",
118	ret);
119	return;
120	}
121	}
122	}
123
124	static int arizona_haptics_play(struct input_dev input, void data,
125	struct ff_effect *effect)
126	{
127	struct arizona_haptics *haptics = input_get_drvdata(input);
128	struct arizona *arizona = haptics->arizona;
129
130	if (!arizona->dapm) {
131	dev_err(arizona->dev, "No DAPM context\n");
132	return -EBUSY;
133	}
134
135	if (effect->u.rumble.strong_magnitude) {
136	/* Scale the magnitude into the range the device supports */
137	if (arizona->pdata.hap_act) {
138	haptics->intensity =
139	effect->u.rumble.strong_magnitude >> 9;
140	if (effect->direction < 0x8000)
141	haptics->intensity += 0x7f;
142	} else {
143	haptics->intensity =
144	effect->u.rumble.strong_magnitude >> 8;
145	}
146	} else {
147	haptics->intensity = 0;
148	}
149
150	schedule_work(&haptics->work);
151
152	return 0;
153	}
154
155	static void arizona_haptics_close(struct input_dev *input)
156	{
157	struct arizona_haptics *haptics = input_get_drvdata(input);
158	struct mutex *dapm_mutex = &haptics->arizona->dapm->card->dapm_mutex;
159
160	cancel_work_sync(&haptics->work);
161
162	mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
163
164	if (haptics->arizona->dapm)
165	snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
166
167	mutex_unlock(dapm_mutex);
168	}
169
170	static int arizona_haptics_probe(struct platform_device *pdev)
171	{
172	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
173	struct arizona_haptics *haptics;
174	int ret;
175
176	haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
177	if (!haptics)
178	return -ENOMEM;
179
180	haptics->arizona = arizona;
181
182	ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
183	ARIZONA_HAP_ACT, arizona->pdata.hap_act);
184	if (ret != 0) {
185	dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
186	ret);
187	return ret;
188	}
189
190	INIT_WORK(&haptics->work, arizona_haptics_work);
191
192	haptics->input_dev = input_allocate_device();
193	if (haptics->input_dev == NULL) {
194	dev_err(arizona->dev, "Failed to allocate input device\n");
195	return -ENOMEM;
196	}
197
198	input_set_drvdata(haptics->input_dev, haptics);
199
200	haptics->input_dev->name = "arizona:haptics";
201	haptics->input_dev->dev.parent = pdev->dev.parent;
202	haptics->input_dev->close = arizona_haptics_close;
203	__set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
204
205	ret = input_ff_create_memless(haptics->input_dev, NULL,
206	arizona_haptics_play);
207	if (ret < 0) {
208	dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
209	ret);
210	goto err_ialloc;
211	}
212
213	ret = input_register_device(haptics->input_dev);
214	if (ret < 0) {
215	dev_err(arizona->dev, "couldn't register input device: %d\n",
216	ret);
217	goto err_iff;
218	}
219
220	platform_set_drvdata(pdev, haptics);
221
222	return 0;
223
224	err_iff:
225	if (haptics->input_dev)
226	input_ff_destroy(haptics->input_dev);
227	err_ialloc:
228	input_free_device(haptics->input_dev);
229
230	return ret;
231	}
232
233	static int arizona_haptics_remove(struct platform_device *pdev)
234	{
235	struct arizona_haptics *haptics = platform_get_drvdata(pdev);
236
237	input_unregister_device(haptics->input_dev);
238
239	return 0;
240	}
241
242	static struct platform_driver arizona_haptics_driver = {
243	.probe = arizona_haptics_probe,
244	.remove = arizona_haptics_remove,
245	.driver = {
246	.name = "arizona-haptics",
247	.owner = THIS_MODULE,
248	},
249	};
250	module_platform_driver(arizona_haptics_driver);
251
252	MODULE_ALIAS("platform:arizona-haptics");
253	MODULE_DESCRIPTION("Arizona haptics driver");
254	MODULE_LICENSE("GPL");
255	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");