// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* twl6040-vibra.c - TWL6040 Vibrator driver
|
*
|
* Author: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
|
* Author: Misael Lopez Cruz <misael.lopez@ti.com>
|
*
|
* Copyright: (C) 2011 Texas Instruments, Inc.
|
*
|
* Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com>
|
* Felipe Balbi <felipe.balbi@nokia.com>
|
* Jari Vanhala <ext-javi.vanhala@nokia.com>
|
*/
|
#include <linux/module.h>
|
#include <linux/platform_device.h>
|
#include <linux/of.h>
|
#include <linux/workqueue.h>
|
#include <linux/input.h>
|
#include <linux/mfd/twl6040.h>
|
#include <linux/slab.h>
|
#include <linux/delay.h>
|
#include <linux/regulator/consumer.h>
|
|
#define EFFECT_DIR_180_DEG 0x8000
|
|
/* Recommended modulation index 85% */
|
#define TWL6040_VIBRA_MOD 85
|
|
#define TWL6040_NUM_SUPPLIES 2
|
|
struct vibra_info {
|
struct device *dev;
|
struct input_dev *input_dev;
|
struct work_struct play_work;
|
|
int irq;
|
|
bool enabled;
|
int weak_speed;
|
int strong_speed;
|
int direction;
|
|
unsigned int vibldrv_res;
|
unsigned int vibrdrv_res;
|
unsigned int viblmotor_res;
|
unsigned int vibrmotor_res;
|
|
struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
|
|
struct twl6040 *twl6040;
|
};
|
|
static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
|
{
|
struct vibra_info *info = data;
|
struct twl6040 *twl6040 = info->twl6040;
|
u8 status;
|
|
status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
|
if (status & TWL6040_VIBLOCDET) {
|
dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
|
twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
|
TWL6040_VIBENA);
|
}
|
if (status & TWL6040_VIBROCDET) {
|
dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
|
twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
|
TWL6040_VIBENA);
|
}
|
|
return IRQ_HANDLED;
|
}
|
|
static void twl6040_vibra_enable(struct vibra_info *info)
|
{
|
struct twl6040 *twl6040 = info->twl6040;
|
int ret;
|
|
ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
|
if (ret) {
|
dev_err(info->dev, "failed to enable regulators %d\n", ret);
|
return;
|
}
|
|
twl6040_power(info->twl6040, 1);
|
if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
|
/*
|
* ERRATA: Disable overcurrent protection for at least
|
* 3ms when enabling vibrator drivers to avoid false
|
* overcurrent detection
|
*/
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
|
TWL6040_VIBENA | TWL6040_VIBCTRL);
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
|
TWL6040_VIBENA | TWL6040_VIBCTRL);
|
usleep_range(3000, 3500);
|
}
|
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
|
TWL6040_VIBENA);
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
|
TWL6040_VIBENA);
|
|
info->enabled = true;
|
}
|
|
static void twl6040_vibra_disable(struct vibra_info *info)
|
{
|
struct twl6040 *twl6040 = info->twl6040;
|
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
|
twl6040_power(info->twl6040, 0);
|
|
regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
|
|
info->enabled = false;
|
}
|
|
static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
|
int speed, int direction)
|
{
|
int vpk, max_code;
|
u8 vibdat;
|
|
/* output swing */
|
vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
|
(100 * (vibdrv_res + motor_res));
|
|
/* 50mV per VIBDAT code step */
|
max_code = vpk / 50;
|
if (max_code > TWL6040_VIBDAT_MAX)
|
max_code = TWL6040_VIBDAT_MAX;
|
|
/* scale speed to max allowed code */
|
vibdat = (u8)((speed * max_code) / USHRT_MAX);
|
|
/* 2's complement for direction > 180 degrees */
|
vibdat *= direction;
|
|
return vibdat;
|
}
|
|
static void twl6040_vibra_set_effect(struct vibra_info *info)
|
{
|
struct twl6040 *twl6040 = info->twl6040;
|
u8 vibdatl, vibdatr;
|
int volt;
|
|
/* weak motor */
|
volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
|
vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
|
info->viblmotor_res,
|
info->weak_speed, info->direction);
|
|
/* strong motor */
|
volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
|
vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
|
info->vibrmotor_res,
|
info->strong_speed, info->direction);
|
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
|
twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
|
}
|
|
static void vibra_play_work(struct work_struct *work)
|
{
|
struct vibra_info *info = container_of(work,
|
struct vibra_info, play_work);
|
int ret;
|
|
/* Do not allow effect, while the routing is set to use audio */
|
ret = twl6040_get_vibralr_status(info->twl6040);
|
if (ret & TWL6040_VIBSEL) {
|
dev_info(info->dev, "Vibra is configured for audio\n");
|
return;
|
}
|
|
if (info->weak_speed || info->strong_speed) {
|
if (!info->enabled)
|
twl6040_vibra_enable(info);
|
|
twl6040_vibra_set_effect(info);
|
} else if (info->enabled)
|
twl6040_vibra_disable(info);
|
|
}
|
|
static int vibra_play(struct input_dev *input, void *data,
|
struct ff_effect *effect)
|
{
|
struct vibra_info *info = input_get_drvdata(input);
|
|
info->weak_speed = effect->u.rumble.weak_magnitude;
|
info->strong_speed = effect->u.rumble.strong_magnitude;
|
info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
|
|
schedule_work(&info->play_work);
|
|
return 0;
|
}
|
|
static void twl6040_vibra_close(struct input_dev *input)
|
{
|
struct vibra_info *info = input_get_drvdata(input);
|
|
cancel_work_sync(&info->play_work);
|
|
if (info->enabled)
|
twl6040_vibra_disable(info);
|
}
|
|
static int __maybe_unused twl6040_vibra_suspend(struct device *dev)
|
{
|
struct platform_device *pdev = to_platform_device(dev);
|
struct vibra_info *info = platform_get_drvdata(pdev);
|
|
cancel_work_sync(&info->play_work);
|
|
if (info->enabled)
|
twl6040_vibra_disable(info);
|
|
return 0;
|
}
|
|
static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
|
|
static int twl6040_vibra_probe(struct platform_device *pdev)
|
{
|
struct device *twl6040_core_dev = pdev->dev.parent;
|
struct device_node *twl6040_core_node;
|
struct vibra_info *info;
|
int vddvibl_uV = 0;
|
int vddvibr_uV = 0;
|
int error;
|
|
twl6040_core_node = of_get_child_by_name(twl6040_core_dev->of_node,
|
"vibra");
|
if (!twl6040_core_node) {
|
dev_err(&pdev->dev, "parent of node is missing?\n");
|
return -EINVAL;
|
}
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
if (!info) {
|
of_node_put(twl6040_core_node);
|
dev_err(&pdev->dev, "couldn't allocate memory\n");
|
return -ENOMEM;
|
}
|
|
info->dev = &pdev->dev;
|
|
info->twl6040 = dev_get_drvdata(pdev->dev.parent);
|
|
of_property_read_u32(twl6040_core_node, "ti,vibldrv-res",
|
&info->vibldrv_res);
|
of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res",
|
&info->vibrdrv_res);
|
of_property_read_u32(twl6040_core_node, "ti,viblmotor-res",
|
&info->viblmotor_res);
|
of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res",
|
&info->vibrmotor_res);
|
of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV", &vddvibl_uV);
|
of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV", &vddvibr_uV);
|
|
of_node_put(twl6040_core_node);
|
|
if ((!info->vibldrv_res && !info->viblmotor_res) ||
|
(!info->vibrdrv_res && !info->vibrmotor_res)) {
|
dev_err(info->dev, "invalid vibra driver/motor resistance\n");
|
return -EINVAL;
|
}
|
|
info->irq = platform_get_irq(pdev, 0);
|
if (info->irq < 0)
|
return -EINVAL;
|
|
error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
|
twl6040_vib_irq_handler,
|
IRQF_ONESHOT,
|
"twl6040_irq_vib", info);
|
if (error) {
|
dev_err(info->dev, "VIB IRQ request failed: %d\n", error);
|
return error;
|
}
|
|
info->supplies[0].supply = "vddvibl";
|
info->supplies[1].supply = "vddvibr";
|
/*
|
* When booted with Device tree the regulators are attached to the
|
* parent device (twl6040 MFD core)
|
*/
|
error = devm_regulator_bulk_get(twl6040_core_dev,
|
ARRAY_SIZE(info->supplies),
|
info->supplies);
|
if (error) {
|
dev_err(info->dev, "couldn't get regulators %d\n", error);
|
return error;
|
}
|
|
if (vddvibl_uV) {
|
error = regulator_set_voltage(info->supplies[0].consumer,
|
vddvibl_uV, vddvibl_uV);
|
if (error) {
|
dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
|
error);
|
return error;
|
}
|
}
|
|
if (vddvibr_uV) {
|
error = regulator_set_voltage(info->supplies[1].consumer,
|
vddvibr_uV, vddvibr_uV);
|
if (error) {
|
dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
|
error);
|
return error;
|
}
|
}
|
|
INIT_WORK(&info->play_work, vibra_play_work);
|
|
info->input_dev = devm_input_allocate_device(&pdev->dev);
|
if (!info->input_dev) {
|
dev_err(info->dev, "couldn't allocate input device\n");
|
return -ENOMEM;
|
}
|
|
input_set_drvdata(info->input_dev, info);
|
|
info->input_dev->name = "twl6040:vibrator";
|
info->input_dev->id.version = 1;
|
info->input_dev->close = twl6040_vibra_close;
|
__set_bit(FF_RUMBLE, info->input_dev->ffbit);
|
|
error = input_ff_create_memless(info->input_dev, NULL, vibra_play);
|
if (error) {
|
dev_err(info->dev, "couldn't register vibrator to FF\n");
|
return error;
|
}
|
|
error = input_register_device(info->input_dev);
|
if (error) {
|
dev_err(info->dev, "couldn't register input device\n");
|
return error;
|
}
|
|
platform_set_drvdata(pdev, info);
|
|
return 0;
|
}
|
|
static struct platform_driver twl6040_vibra_driver = {
|
.probe = twl6040_vibra_probe,
|
.driver = {
|
.name = "twl6040-vibra",
|
.pm = &twl6040_vibra_pm_ops,
|
},
|
};
|
module_platform_driver(twl6040_vibra_driver);
|
|
MODULE_ALIAS("platform:twl6040-vibra");
|
MODULE_DESCRIPTION("TWL6040 Vibra driver");
|
MODULE_LICENSE("GPL");
|
MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
|
MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
|
