1 // SPDX-License-Identifier: GPL-2.0-only
3 * Arizona haptics driver
5 * Copyright 2012 Wolfson Microelectronics plc
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/input.h>
13 #include <linux/slab.h>
15 #include <sound/soc.h>
16 #include <sound/soc-dapm.h>
18 #include <linux/mfd/arizona/core.h>
19 #include <linux/mfd/arizona/pdata.h>
20 #include <linux/mfd/arizona/registers.h>
22 struct arizona_haptics {
23 struct arizona *arizona;
24 struct input_dev *input_dev;
25 struct work_struct work;
31 static void arizona_haptics_work(struct work_struct *work)
33 struct arizona_haptics *haptics = container_of(work,
34 struct arizona_haptics,
36 struct arizona *arizona = haptics->arizona;
37 struct snd_soc_component *component =
38 snd_soc_dapm_to_component(arizona->dapm);
41 if (!haptics->arizona->dapm) {
42 dev_err(arizona->dev, "No DAPM context\n");
46 if (haptics->intensity) {
47 ret = regmap_update_bits(arizona->regmap,
48 ARIZONA_HAPTICS_PHASE_2_INTENSITY,
49 ARIZONA_PHASE2_INTENSITY_MASK,
52 dev_err(arizona->dev, "Failed to set intensity: %d\n",
57 /* This enable sequence will be a noop if already enabled */
58 ret = regmap_update_bits(arizona->regmap,
59 ARIZONA_HAPTICS_CONTROL_1,
60 ARIZONA_HAP_CTRL_MASK,
61 1 << ARIZONA_HAP_CTRL_SHIFT);
63 dev_err(arizona->dev, "Failed to start haptics: %d\n",
68 ret = snd_soc_component_enable_pin(component, "HAPTICS");
70 dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
75 ret = snd_soc_dapm_sync(arizona->dapm);
77 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
82 /* This disable sequence will be a noop if already enabled */
83 ret = snd_soc_component_disable_pin(component, "HAPTICS");
85 dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
90 ret = snd_soc_dapm_sync(arizona->dapm);
92 dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
97 ret = regmap_update_bits(arizona->regmap,
98 ARIZONA_HAPTICS_CONTROL_1,
99 ARIZONA_HAP_CTRL_MASK, 0);
101 dev_err(arizona->dev, "Failed to stop haptics: %d\n",
108 static int arizona_haptics_play(struct input_dev *input, void *data,
109 struct ff_effect *effect)
111 struct arizona_haptics *haptics = input_get_drvdata(input);
112 struct arizona *arizona = haptics->arizona;
114 if (!arizona->dapm) {
115 dev_err(arizona->dev, "No DAPM context\n");
119 if (effect->u.rumble.strong_magnitude) {
120 /* Scale the magnitude into the range the device supports */
121 if (arizona->pdata.hap_act) {
123 effect->u.rumble.strong_magnitude >> 9;
124 if (effect->direction < 0x8000)
125 haptics->intensity += 0x7f;
128 effect->u.rumble.strong_magnitude >> 8;
131 haptics->intensity = 0;
134 schedule_work(&haptics->work);
139 static void arizona_haptics_close(struct input_dev *input)
141 struct arizona_haptics *haptics = input_get_drvdata(input);
142 struct snd_soc_component *component;
144 cancel_work_sync(&haptics->work);
146 if (haptics->arizona->dapm) {
147 component = snd_soc_dapm_to_component(haptics->arizona->dapm);
148 snd_soc_component_disable_pin(component, "HAPTICS");
152 static int arizona_haptics_probe(struct platform_device *pdev)
154 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
155 struct arizona_haptics *haptics;
158 haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
162 haptics->arizona = arizona;
164 ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
165 ARIZONA_HAP_ACT, arizona->pdata.hap_act);
167 dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
172 INIT_WORK(&haptics->work, arizona_haptics_work);
174 haptics->input_dev = devm_input_allocate_device(&pdev->dev);
175 if (!haptics->input_dev) {
176 dev_err(arizona->dev, "Failed to allocate input device\n");
180 input_set_drvdata(haptics->input_dev, haptics);
182 haptics->input_dev->name = "arizona:haptics";
183 haptics->input_dev->close = arizona_haptics_close;
184 __set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
186 ret = input_ff_create_memless(haptics->input_dev, NULL,
187 arizona_haptics_play);
189 dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
194 ret = input_register_device(haptics->input_dev);
196 dev_err(arizona->dev, "couldn't register input device: %d\n",
204 static struct platform_driver arizona_haptics_driver = {
205 .probe = arizona_haptics_probe,
207 .name = "arizona-haptics",
210 module_platform_driver(arizona_haptics_driver);
212 MODULE_ALIAS("platform:arizona-haptics");
213 MODULE_DESCRIPTION("Arizona haptics driver");
214 MODULE_LICENSE("GPL");
215 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");