// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Arizona haptics driver
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*
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* Copyright 2012 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <linux/mfd/arizona/core.h>
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#include <linux/mfd/arizona/pdata.h>
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#include <linux/mfd/arizona/registers.h>
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struct arizona_haptics {
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struct arizona *arizona;
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struct input_dev *input_dev;
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struct work_struct work;
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struct mutex mutex;
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u8 intensity;
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};
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static void arizona_haptics_work(struct work_struct *work)
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{
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struct arizona_haptics *haptics = container_of(work,
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struct arizona_haptics,
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work);
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struct arizona *arizona = haptics->arizona;
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struct snd_soc_component *component =
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snd_soc_dapm_to_component(arizona->dapm);
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int ret;
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if (!haptics->arizona->dapm) {
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dev_err(arizona->dev, "No DAPM context\n");
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return;
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}
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if (haptics->intensity) {
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ret = regmap_update_bits(arizona->regmap,
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ARIZONA_HAPTICS_PHASE_2_INTENSITY,
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ARIZONA_PHASE2_INTENSITY_MASK,
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haptics->intensity);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to set intensity: %d\n",
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ret);
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return;
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}
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/* This enable sequence will be a noop if already enabled */
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ret = regmap_update_bits(arizona->regmap,
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ARIZONA_HAPTICS_CONTROL_1,
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ARIZONA_HAP_CTRL_MASK,
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1 << ARIZONA_HAP_CTRL_SHIFT);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to start haptics: %d\n",
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ret);
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return;
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}
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ret = snd_soc_component_enable_pin(component, "HAPTICS");
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to start HAPTICS: %d\n",
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ret);
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return;
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}
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ret = snd_soc_dapm_sync(arizona->dapm);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
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ret);
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return;
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}
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} else {
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/* This disable sequence will be a noop if already enabled */
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ret = snd_soc_component_disable_pin(component, "HAPTICS");
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n",
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ret);
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return;
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}
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ret = snd_soc_dapm_sync(arizona->dapm);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to sync DAPM: %d\n",
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ret);
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return;
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}
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ret = regmap_update_bits(arizona->regmap,
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ARIZONA_HAPTICS_CONTROL_1,
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ARIZONA_HAP_CTRL_MASK, 0);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to stop haptics: %d\n",
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ret);
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return;
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}
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}
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}
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static int arizona_haptics_play(struct input_dev *input, void *data,
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struct ff_effect *effect)
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{
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struct arizona_haptics *haptics = input_get_drvdata(input);
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struct arizona *arizona = haptics->arizona;
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if (!arizona->dapm) {
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dev_err(arizona->dev, "No DAPM context\n");
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return -EBUSY;
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}
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if (effect->u.rumble.strong_magnitude) {
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/* Scale the magnitude into the range the device supports */
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if (arizona->pdata.hap_act) {
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haptics->intensity =
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effect->u.rumble.strong_magnitude >> 9;
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if (effect->direction < 0x8000)
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haptics->intensity += 0x7f;
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} else {
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haptics->intensity =
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effect->u.rumble.strong_magnitude >> 8;
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}
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} else {
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haptics->intensity = 0;
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}
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schedule_work(&haptics->work);
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return 0;
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}
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static void arizona_haptics_close(struct input_dev *input)
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{
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struct arizona_haptics *haptics = input_get_drvdata(input);
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struct snd_soc_component *component;
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cancel_work_sync(&haptics->work);
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if (haptics->arizona->dapm) {
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component = snd_soc_dapm_to_component(haptics->arizona->dapm);
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snd_soc_component_disable_pin(component, "HAPTICS");
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}
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}
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static int arizona_haptics_probe(struct platform_device *pdev)
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{
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struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
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struct arizona_haptics *haptics;
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int ret;
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haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL);
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if (!haptics)
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return -ENOMEM;
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haptics->arizona = arizona;
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ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1,
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ARIZONA_HAP_ACT, arizona->pdata.hap_act);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to set haptics actuator: %d\n",
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ret);
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return ret;
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}
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INIT_WORK(&haptics->work, arizona_haptics_work);
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haptics->input_dev = devm_input_allocate_device(&pdev->dev);
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if (!haptics->input_dev) {
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dev_err(arizona->dev, "Failed to allocate input device\n");
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return -ENOMEM;
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}
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input_set_drvdata(haptics->input_dev, haptics);
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haptics->input_dev->name = "arizona:haptics";
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haptics->input_dev->close = arizona_haptics_close;
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__set_bit(FF_RUMBLE, haptics->input_dev->ffbit);
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ret = input_ff_create_memless(haptics->input_dev, NULL,
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arizona_haptics_play);
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if (ret < 0) {
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dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n",
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ret);
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return ret;
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}
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ret = input_register_device(haptics->input_dev);
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if (ret < 0) {
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dev_err(arizona->dev, "couldn't register input device: %d\n",
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ret);
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return ret;
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}
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return 0;
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}
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static struct platform_driver arizona_haptics_driver = {
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.probe = arizona_haptics_probe,
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.driver = {
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.name = "arizona-haptics",
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},
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};
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module_platform_driver(arizona_haptics_driver);
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MODULE_ALIAS("platform:arizona-haptics");
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MODULE_DESCRIPTION("Arizona haptics driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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