mirror of https://gitee.com/openkylin/linux.git
155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2018 Spreadtrum Communications Inc.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/input.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#define CUR_DRV_CAL_SEL GENMASK(13, 12)
|
|
#define SLP_LDOVIBR_PD_EN BIT(9)
|
|
#define LDO_VIBR_PD BIT(8)
|
|
|
|
struct vibra_info {
|
|
struct input_dev *input_dev;
|
|
struct work_struct play_work;
|
|
struct regmap *regmap;
|
|
u32 base;
|
|
u32 strength;
|
|
bool enabled;
|
|
};
|
|
|
|
static void sc27xx_vibra_set(struct vibra_info *info, bool on)
|
|
{
|
|
if (on) {
|
|
regmap_update_bits(info->regmap, info->base, LDO_VIBR_PD, 0);
|
|
regmap_update_bits(info->regmap, info->base,
|
|
SLP_LDOVIBR_PD_EN, 0);
|
|
info->enabled = true;
|
|
} else {
|
|
regmap_update_bits(info->regmap, info->base, LDO_VIBR_PD,
|
|
LDO_VIBR_PD);
|
|
regmap_update_bits(info->regmap, info->base,
|
|
SLP_LDOVIBR_PD_EN, SLP_LDOVIBR_PD_EN);
|
|
info->enabled = false;
|
|
}
|
|
}
|
|
|
|
static int sc27xx_vibra_hw_init(struct vibra_info *info)
|
|
{
|
|
return regmap_update_bits(info->regmap, info->base, CUR_DRV_CAL_SEL, 0);
|
|
}
|
|
|
|
static void sc27xx_vibra_play_work(struct work_struct *work)
|
|
{
|
|
struct vibra_info *info = container_of(work, struct vibra_info,
|
|
play_work);
|
|
|
|
if (info->strength && !info->enabled)
|
|
sc27xx_vibra_set(info, true);
|
|
else if (info->strength == 0 && info->enabled)
|
|
sc27xx_vibra_set(info, false);
|
|
}
|
|
|
|
static int sc27xx_vibra_play(struct input_dev *input, void *data,
|
|
struct ff_effect *effect)
|
|
{
|
|
struct vibra_info *info = input_get_drvdata(input);
|
|
|
|
info->strength = effect->u.rumble.weak_magnitude;
|
|
schedule_work(&info->play_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sc27xx_vibra_close(struct input_dev *input)
|
|
{
|
|
struct vibra_info *info = input_get_drvdata(input);
|
|
|
|
cancel_work_sync(&info->play_work);
|
|
if (info->enabled)
|
|
sc27xx_vibra_set(info, false);
|
|
}
|
|
|
|
static int sc27xx_vibra_probe(struct platform_device *pdev)
|
|
{
|
|
struct vibra_info *info;
|
|
int error;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!info->regmap) {
|
|
dev_err(&pdev->dev, "failed to get vibrator regmap.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
error = device_property_read_u32(&pdev->dev, "reg", &info->base);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "failed to get vibrator base address.\n");
|
|
return error;
|
|
}
|
|
|
|
info->input_dev = devm_input_allocate_device(&pdev->dev);
|
|
if (!info->input_dev) {
|
|
dev_err(&pdev->dev, "failed to allocate input device.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->input_dev->name = "sc27xx:vibrator";
|
|
info->input_dev->id.version = 0;
|
|
info->input_dev->close = sc27xx_vibra_close;
|
|
|
|
input_set_drvdata(info->input_dev, info);
|
|
input_set_capability(info->input_dev, EV_FF, FF_RUMBLE);
|
|
INIT_WORK(&info->play_work, sc27xx_vibra_play_work);
|
|
info->enabled = false;
|
|
|
|
error = sc27xx_vibra_hw_init(info);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "failed to initialize the vibrator.\n");
|
|
return error;
|
|
}
|
|
|
|
error = input_ff_create_memless(info->input_dev, NULL,
|
|
sc27xx_vibra_play);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "failed to register vibrator to FF.\n");
|
|
return error;
|
|
}
|
|
|
|
error = input_register_device(info->input_dev);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "failed to register input device.\n");
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sc27xx_vibra_of_match[] = {
|
|
{ .compatible = "sprd,sc2731-vibrator", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sc27xx_vibra_of_match);
|
|
|
|
static struct platform_driver sc27xx_vibra_driver = {
|
|
.driver = {
|
|
.name = "sc27xx-vibrator",
|
|
.of_match_table = sc27xx_vibra_of_match,
|
|
},
|
|
.probe = sc27xx_vibra_probe,
|
|
};
|
|
|
|
module_platform_driver(sc27xx_vibra_driver);
|
|
|
|
MODULE_DESCRIPTION("Spreadtrum SC27xx Vibrator Driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Xiaotong Lu <xiaotong.lu@spreadtrum.com>");
|