![Charles Keepax](/assets/img/avatar_default.png)
We shouldn't assign the parent device of the input_dev to be the parent MFD device, because this will be used for devres which causes input_unregister_device to run after the haptics device has been removed, since it is itself a child of the MFD device. The default of using the haptics device itself as the parent is correct. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
216 lines
5.2 KiB
C
216 lines
5.2 KiB
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, 0);
|
|
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->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>");
|