2 * Arizona haptics driver
4 * Copyright 2012 Wolfson Microelectronics plc
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/input.h>
16 #include <linux/slab.h>
18 #include <sound/soc.h>
19 #include <sound/soc-dapm.h>
21 #include <linux/mfd/arizona/core.h>
22 #include <linux/mfd/arizona/pdata.h>
23 #include <linux/mfd/arizona/registers.h>
25 struct arizona_haptics {
26 struct arizona *arizona;
27 struct input_dev *input_dev;
28 struct work_struct work;
34 static void arizona_haptics_work(struct work_struct *work)
36 struct arizona_haptics *haptics = container_of(work,
37 struct arizona_haptics,
39 struct arizona *arizona = haptics->arizona;
40 struct mutex *dapm_mutex = &arizona->dapm->card->dapm_mutex;
43 if (!haptics->arizona->dapm) {
44 dev_err(arizona->dev, "No DAPM context\n");
48 if (haptics->intensity) {
49 ret = regmap_update_bits(arizona->regmap,
50 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
51 ARIZONA_PHASE2_INTENSITY_MASK,
54 dev_err(arizona->dev, "Failed to set intensity: %d\n",
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);
65 dev_err(arizona->dev, "Failed to start haptics: %d\n",
70 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
72 ret = snd_soc_dapm_enable_pin(arizona->dapm, "HAPTICS");
74 dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
76 mutex_unlock(dapm_mutex);
80 ret = snd_soc_dapm_sync(arizona->dapm);
82 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
84 mutex_unlock(dapm_mutex);
88 mutex_unlock(dapm_mutex);
91 /* This disable sequence will be a noop if already enabled */
92 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
94 ret = snd_soc_dapm_disable_pin(arizona->dapm, "HAPTICS");
96 dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
98 mutex_unlock(dapm_mutex);
102 ret = snd_soc_dapm_sync(arizona->dapm);
104 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
106 mutex_unlock(dapm_mutex);
110 mutex_unlock(dapm_mutex);
112 ret = regmap_update_bits(arizona->regmap,
113 ARIZONA_HAPTICS_CONTROL_1,
114 ARIZONA_HAP_CTRL_MASK,
115 1 << ARIZONA_HAP_CTRL_SHIFT);
117 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
124 static int arizona_haptics_play(struct input_dev *input, void *data,
125 struct ff_effect *effect)
127 struct arizona_haptics *haptics = input_get_drvdata(input);
128 struct arizona *arizona = haptics->arizona;
130 if (!arizona->dapm) {
131 dev_err(arizona->dev, "No DAPM context\n");
135 if (effect->u.rumble.strong_magnitude) {
136 /* Scale the magnitude into the range the device supports */
137 if (arizona->pdata.hap_act) {
139 effect->u.rumble.strong_magnitude >> 9;
140 if (effect->direction < 0x8000)
141 haptics->intensity += 0x7f;
144 effect->u.rumble.strong_magnitude >> 8;
147 haptics->intensity = 0;
150 schedule_work(&haptics->work);
155 static void arizona_haptics_close(struct input_dev *input)
157 struct arizona_haptics *haptics = input_get_drvdata(input);
158 struct mutex *dapm_mutex = &haptics->arizona->dapm->card->dapm_mutex;
160 cancel_work_sync(&haptics->work);
162 mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
164 if (haptics->arizona->dapm)
165 snd_soc_dapm_disable_pin(haptics->arizona->dapm, "HAPTICS");
167 mutex_unlock(dapm_mutex);
170 static int arizona_haptics_probe(struct platform_device *pdev)
172 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
173 struct arizona_haptics *haptics;
176 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
180 haptics->arizona = arizona;
182 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
183 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
185 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
190 INIT_WORK(&haptics->work, arizona_haptics_work);
192 haptics->input_dev = input_allocate_device();
193 if (haptics->input_dev == NULL) {
194 dev_err(arizona->dev, "Failed to allocate input device\n");
198 input_set_drvdata(haptics->input_dev, haptics);
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);
205 ret = input_ff_create_memless(haptics->input_dev, NULL,
206 arizona_haptics_play);
208 dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
213 ret = input_register_device(haptics->input_dev);
215 dev_err(arizona->dev, "couldn't register input device: %d\n",
220 platform_set_drvdata(pdev, haptics);
225 if (haptics->input_dev)
226 input_ff_destroy(haptics->input_dev);
228 input_free_device(haptics->input_dev);
233 static int arizona_haptics_remove(struct platform_device *pdev)
235 struct arizona_haptics *haptics = platform_get_drvdata(pdev);
237 input_unregister_device(haptics->input_dev);
242 static struct platform_driver arizona_haptics_driver = {
243 .probe = arizona_haptics_probe,
244 .remove = arizona_haptics_remove,
246 .name = "arizona-haptics",
247 .owner = THIS_MODULE,
250 module_platform_driver(arizona_haptics_driver);
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>");