417 строки
10 KiB
C
417 строки
10 KiB
C
/*
|
|
* MAX8997-haptic controller driver
|
|
*
|
|
* Copyright (C) 2012 Samsung Electronics
|
|
* Donggeun Kim <dg77.kim@samsung.com>
|
|
*
|
|
* This program is not provided / owned by Maxim Integrated Products.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/pwm.h>
|
|
#include <linux/input.h>
|
|
#include <linux/mfd/max8997-private.h>
|
|
#include <linux/mfd/max8997.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
/* Haptic configuration 2 register */
|
|
#define MAX8997_MOTOR_TYPE_SHIFT 7
|
|
#define MAX8997_ENABLE_SHIFT 6
|
|
#define MAX8997_MODE_SHIFT 5
|
|
|
|
/* Haptic driver configuration register */
|
|
#define MAX8997_CYCLE_SHIFT 6
|
|
#define MAX8997_SIG_PERIOD_SHIFT 4
|
|
#define MAX8997_SIG_DUTY_SHIFT 2
|
|
#define MAX8997_PWM_DUTY_SHIFT 0
|
|
|
|
struct max8997_haptic {
|
|
struct device *dev;
|
|
struct i2c_client *client;
|
|
struct input_dev *input_dev;
|
|
struct regulator *regulator;
|
|
|
|
struct work_struct work;
|
|
struct mutex mutex;
|
|
|
|
bool enabled;
|
|
unsigned int level;
|
|
|
|
struct pwm_device *pwm;
|
|
unsigned int pwm_period;
|
|
enum max8997_haptic_pwm_divisor pwm_divisor;
|
|
|
|
enum max8997_haptic_motor_type type;
|
|
enum max8997_haptic_pulse_mode mode;
|
|
|
|
unsigned int internal_mode_pattern;
|
|
unsigned int pattern_cycle;
|
|
unsigned int pattern_signal_period;
|
|
};
|
|
|
|
static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (chip->mode == MAX8997_EXTERNAL_MODE) {
|
|
unsigned int duty = chip->pwm_period * chip->level / 100;
|
|
ret = pwm_config(chip->pwm, duty, chip->pwm_period);
|
|
} else {
|
|
int i;
|
|
u8 duty_index = 0;
|
|
|
|
for (i = 0; i <= 64; i++) {
|
|
if (chip->level <= i * 100 / 64) {
|
|
duty_index = i;
|
|
break;
|
|
}
|
|
}
|
|
switch (chip->internal_mode_pattern) {
|
|
case 0:
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGPWMDC1, duty_index);
|
|
break;
|
|
case 1:
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGPWMDC2, duty_index);
|
|
break;
|
|
case 2:
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGPWMDC3, duty_index);
|
|
break;
|
|
case 3:
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGPWMDC4, duty_index);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void max8997_haptic_configure(struct max8997_haptic *chip)
|
|
{
|
|
u8 value;
|
|
|
|
value = chip->type << MAX8997_MOTOR_TYPE_SHIFT |
|
|
chip->enabled << MAX8997_ENABLE_SHIFT |
|
|
chip->mode << MAX8997_MODE_SHIFT | chip->pwm_divisor;
|
|
max8997_write_reg(chip->client, MAX8997_HAPTIC_REG_CONF2, value);
|
|
|
|
if (chip->mode == MAX8997_INTERNAL_MODE && chip->enabled) {
|
|
value = chip->internal_mode_pattern << MAX8997_CYCLE_SHIFT |
|
|
chip->internal_mode_pattern << MAX8997_SIG_PERIOD_SHIFT |
|
|
chip->internal_mode_pattern << MAX8997_SIG_DUTY_SHIFT |
|
|
chip->internal_mode_pattern << MAX8997_PWM_DUTY_SHIFT;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_DRVCONF, value);
|
|
|
|
switch (chip->internal_mode_pattern) {
|
|
case 0:
|
|
value = chip->pattern_cycle << 4;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_CYCLECONF1, value);
|
|
value = chip->pattern_signal_period;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGCONF1, value);
|
|
break;
|
|
|
|
case 1:
|
|
value = chip->pattern_cycle;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_CYCLECONF1, value);
|
|
value = chip->pattern_signal_period;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGCONF2, value);
|
|
break;
|
|
|
|
case 2:
|
|
value = chip->pattern_cycle << 4;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_CYCLECONF2, value);
|
|
value = chip->pattern_signal_period;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGCONF3, value);
|
|
break;
|
|
|
|
case 3:
|
|
value = chip->pattern_cycle;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_CYCLECONF2, value);
|
|
value = chip->pattern_signal_period;
|
|
max8997_write_reg(chip->client,
|
|
MAX8997_HAPTIC_REG_SIGCONF4, value);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void max8997_haptic_enable(struct max8997_haptic *chip)
|
|
{
|
|
int error;
|
|
|
|
mutex_lock(&chip->mutex);
|
|
|
|
error = max8997_haptic_set_duty_cycle(chip);
|
|
if (error) {
|
|
dev_err(chip->dev, "set_pwm_cycle failed, error: %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
if (!chip->enabled) {
|
|
error = regulator_enable(chip->regulator);
|
|
if (error) {
|
|
dev_err(chip->dev, "Failed to enable regulator\n");
|
|
goto out;
|
|
}
|
|
max8997_haptic_configure(chip);
|
|
if (chip->mode == MAX8997_EXTERNAL_MODE) {
|
|
error = pwm_enable(chip->pwm);
|
|
if (error) {
|
|
dev_err(chip->dev, "Failed to enable PWM\n");
|
|
regulator_disable(chip->regulator);
|
|
goto out;
|
|
}
|
|
}
|
|
chip->enabled = true;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&chip->mutex);
|
|
}
|
|
|
|
static void max8997_haptic_disable(struct max8997_haptic *chip)
|
|
{
|
|
mutex_lock(&chip->mutex);
|
|
|
|
if (chip->enabled) {
|
|
chip->enabled = false;
|
|
max8997_haptic_configure(chip);
|
|
if (chip->mode == MAX8997_EXTERNAL_MODE)
|
|
pwm_disable(chip->pwm);
|
|
regulator_disable(chip->regulator);
|
|
}
|
|
|
|
mutex_unlock(&chip->mutex);
|
|
}
|
|
|
|
static void max8997_haptic_play_effect_work(struct work_struct *work)
|
|
{
|
|
struct max8997_haptic *chip =
|
|
container_of(work, struct max8997_haptic, work);
|
|
|
|
if (chip->level)
|
|
max8997_haptic_enable(chip);
|
|
else
|
|
max8997_haptic_disable(chip);
|
|
}
|
|
|
|
static int max8997_haptic_play_effect(struct input_dev *dev, void *data,
|
|
struct ff_effect *effect)
|
|
{
|
|
struct max8997_haptic *chip = input_get_drvdata(dev);
|
|
|
|
chip->level = effect->u.rumble.strong_magnitude;
|
|
if (!chip->level)
|
|
chip->level = effect->u.rumble.weak_magnitude;
|
|
|
|
schedule_work(&chip->work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max8997_haptic_close(struct input_dev *dev)
|
|
{
|
|
struct max8997_haptic *chip = input_get_drvdata(dev);
|
|
|
|
cancel_work_sync(&chip->work);
|
|
max8997_haptic_disable(chip);
|
|
}
|
|
|
|
static int max8997_haptic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
|
|
const struct max8997_platform_data *pdata =
|
|
dev_get_platdata(iodev->dev);
|
|
const struct max8997_haptic_platform_data *haptic_pdata =
|
|
pdata->haptic_pdata;
|
|
struct max8997_haptic *chip;
|
|
struct input_dev *input_dev;
|
|
int error;
|
|
|
|
if (!haptic_pdata) {
|
|
dev_err(&pdev->dev, "no haptic platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
chip = kzalloc(sizeof(struct max8997_haptic), GFP_KERNEL);
|
|
input_dev = input_allocate_device();
|
|
if (!chip || !input_dev) {
|
|
dev_err(&pdev->dev, "unable to allocate memory\n");
|
|
error = -ENOMEM;
|
|
goto err_free_mem;
|
|
}
|
|
|
|
INIT_WORK(&chip->work, max8997_haptic_play_effect_work);
|
|
mutex_init(&chip->mutex);
|
|
|
|
chip->client = iodev->haptic;
|
|
chip->dev = &pdev->dev;
|
|
chip->input_dev = input_dev;
|
|
chip->pwm_period = haptic_pdata->pwm_period;
|
|
chip->type = haptic_pdata->type;
|
|
chip->mode = haptic_pdata->mode;
|
|
chip->pwm_divisor = haptic_pdata->pwm_divisor;
|
|
|
|
switch (chip->mode) {
|
|
case MAX8997_INTERNAL_MODE:
|
|
chip->internal_mode_pattern =
|
|
haptic_pdata->internal_mode_pattern;
|
|
chip->pattern_cycle = haptic_pdata->pattern_cycle;
|
|
chip->pattern_signal_period =
|
|
haptic_pdata->pattern_signal_period;
|
|
break;
|
|
|
|
case MAX8997_EXTERNAL_MODE:
|
|
chip->pwm = pwm_request(haptic_pdata->pwm_channel_id,
|
|
"max8997-haptic");
|
|
if (IS_ERR(chip->pwm)) {
|
|
error = PTR_ERR(chip->pwm);
|
|
dev_err(&pdev->dev,
|
|
"unable to request PWM for haptic, error: %d\n",
|
|
error);
|
|
goto err_free_mem;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
dev_err(&pdev->dev,
|
|
"Invalid chip mode specified (%d)\n", chip->mode);
|
|
error = -EINVAL;
|
|
goto err_free_mem;
|
|
}
|
|
|
|
chip->regulator = regulator_get(&pdev->dev, "inmotor");
|
|
if (IS_ERR(chip->regulator)) {
|
|
error = PTR_ERR(chip->regulator);
|
|
dev_err(&pdev->dev,
|
|
"unable to get regulator, error: %d\n",
|
|
error);
|
|
goto err_free_pwm;
|
|
}
|
|
|
|
input_dev->name = "max8997-haptic";
|
|
input_dev->id.version = 1;
|
|
input_dev->dev.parent = &pdev->dev;
|
|
input_dev->close = max8997_haptic_close;
|
|
input_set_drvdata(input_dev, chip);
|
|
input_set_capability(input_dev, EV_FF, FF_RUMBLE);
|
|
|
|
error = input_ff_create_memless(input_dev, NULL,
|
|
max8997_haptic_play_effect);
|
|
if (error) {
|
|
dev_err(&pdev->dev,
|
|
"unable to create FF device, error: %d\n",
|
|
error);
|
|
goto err_put_regulator;
|
|
}
|
|
|
|
error = input_register_device(input_dev);
|
|
if (error) {
|
|
dev_err(&pdev->dev,
|
|
"unable to register input device, error: %d\n",
|
|
error);
|
|
goto err_destroy_ff;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, chip);
|
|
return 0;
|
|
|
|
err_destroy_ff:
|
|
input_ff_destroy(input_dev);
|
|
err_put_regulator:
|
|
regulator_put(chip->regulator);
|
|
err_free_pwm:
|
|
if (chip->mode == MAX8997_EXTERNAL_MODE)
|
|
pwm_free(chip->pwm);
|
|
err_free_mem:
|
|
input_free_device(input_dev);
|
|
kfree(chip);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int max8997_haptic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8997_haptic *chip = platform_get_drvdata(pdev);
|
|
|
|
input_unregister_device(chip->input_dev);
|
|
regulator_put(chip->regulator);
|
|
|
|
if (chip->mode == MAX8997_EXTERNAL_MODE)
|
|
pwm_free(chip->pwm);
|
|
|
|
kfree(chip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int max8997_haptic_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct max8997_haptic *chip = platform_get_drvdata(pdev);
|
|
|
|
max8997_haptic_disable(chip);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(max8997_haptic_pm_ops, max8997_haptic_suspend, NULL);
|
|
|
|
static const struct platform_device_id max8997_haptic_id[] = {
|
|
{ "max8997-haptic", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max8997_haptic_id);
|
|
|
|
static struct platform_driver max8997_haptic_driver = {
|
|
.driver = {
|
|
.name = "max8997-haptic",
|
|
.owner = THIS_MODULE,
|
|
.pm = &max8997_haptic_pm_ops,
|
|
},
|
|
.probe = max8997_haptic_probe,
|
|
.remove = max8997_haptic_remove,
|
|
.id_table = max8997_haptic_id,
|
|
};
|
|
module_platform_driver(max8997_haptic_driver);
|
|
|
|
MODULE_ALIAS("platform:max8997-haptic");
|
|
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
|
|
MODULE_DESCRIPTION("max8997_haptic driver");
|
|
MODULE_LICENSE("GPL");
|