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Input: add driver support for MAX8997-haptic
The MAX8997-haptic function can be used to control motor. User can control the haptic driver by using force feedback framework. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Donggeun Kim
Dmitry Torokhov
parent
145e97348a
commit
104594b01c
@ -134,6 +134,18 @@ config INPUT_MAX8925_ONKEY
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To compile this driver as a module, choose M here: the module
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will be called max8925_onkey.
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config INPUT_MAX8997_HAPTIC
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tristate "MAXIM MAX8997 haptic controller support"
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depends on HAVE_PWM && MFD_MAX8997
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select INPUT_FF_MEMLESS
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help
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This option enables device driver support for the haptic controller
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on MAXIM MAX8997 chip. This driver supports ff-memless interface
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from input framework.
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To compile this driver as module, choose M here: the
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module will be called max8997-haptic.
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config INPUT_MC13783_PWRBUTTON
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tristate "MC13783 ON buttons"
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depends on MFD_MC13783
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@ -31,6 +31,7 @@ obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
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obj-$(CONFIG_INPUT_KXTJ9) += kxtj9.o
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obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
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obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o
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obj-$(CONFIG_INPUT_MAX8997_HAPTIC) += max8997_haptic.o
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obj-$(CONFIG_INPUT_MC13783_PWRBUTTON) += mc13783-pwrbutton.o
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obj-$(CONFIG_INPUT_MMA8450) += mma8450.o
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obj-$(CONFIG_INPUT_MPU3050) += mpu3050.o
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407
drivers/input/misc/max8997_haptic.c
Normal file
407
drivers/input/misc/max8997_haptic.c
Normal file
@ -0,0 +1,407 @@
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/*
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* MAX8997-haptic controller driver
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*
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* Copyright (C) 2012 Samsung Electronics
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* Donggeun Kim <dg77.kim@samsung.com>
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*
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* This program is not provided / owned by Maxim Integrated Products.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/pwm.h>
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#include <linux/input.h>
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#include <linux/mfd/max8997-private.h>
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#include <linux/mfd/max8997.h>
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#include <linux/regulator/consumer.h>
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/* Haptic configuration 2 register */
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#define MAX8997_MOTOR_TYPE_SHIFT 7
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#define MAX8997_ENABLE_SHIFT 6
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#define MAX8997_MODE_SHIFT 5
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/* Haptic driver configuration register */
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#define MAX8997_CYCLE_SHIFT 6
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#define MAX8997_SIG_PERIOD_SHIFT 4
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#define MAX8997_SIG_DUTY_SHIFT 2
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#define MAX8997_PWM_DUTY_SHIFT 0
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struct max8997_haptic {
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struct device *dev;
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struct i2c_client *client;
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struct input_dev *input_dev;
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struct regulator *regulator;
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struct work_struct work;
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struct mutex mutex;
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bool enabled;
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unsigned int level;
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struct pwm_device *pwm;
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unsigned int pwm_period;
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enum max8997_haptic_pwm_divisor pwm_divisor;
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enum max8997_haptic_motor_type type;
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enum max8997_haptic_pulse_mode mode;
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unsigned int internal_mode_pattern;
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unsigned int pattern_cycle;
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unsigned int pattern_signal_period;
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};
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static int max8997_haptic_set_duty_cycle(struct max8997_haptic *chip)
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{
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int ret = 0;
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if (chip->mode == MAX8997_EXTERNAL_MODE) {
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unsigned int duty = chip->pwm_period * chip->level / 100;
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ret = pwm_config(chip->pwm, duty, chip->pwm_period);
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} else {
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int i;
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u8 duty_index = 0;
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for (i = 0; i <= 64; i++) {
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if (chip->level <= i * 100 / 64) {
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duty_index = i;
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break;
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}
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}
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switch (chip->internal_mode_pattern) {
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case 0:
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGPWMDC1, duty_index);
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break;
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case 1:
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGPWMDC2, duty_index);
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break;
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case 2:
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGPWMDC3, duty_index);
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break;
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case 3:
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGPWMDC4, duty_index);
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break;
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default:
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break;
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}
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}
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return ret;
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}
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static void max8997_haptic_configure(struct max8997_haptic *chip)
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{
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u8 value;
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value = chip->type << MAX8997_MOTOR_TYPE_SHIFT |
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chip->enabled << MAX8997_ENABLE_SHIFT |
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chip->mode << MAX8997_MODE_SHIFT | chip->pwm_divisor;
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max8997_write_reg(chip->client, MAX8997_HAPTIC_REG_CONF2, value);
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if (chip->mode == MAX8997_INTERNAL_MODE && chip->enabled) {
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value = chip->internal_mode_pattern << MAX8997_CYCLE_SHIFT |
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chip->internal_mode_pattern << MAX8997_SIG_PERIOD_SHIFT |
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chip->internal_mode_pattern << MAX8997_SIG_DUTY_SHIFT |
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chip->internal_mode_pattern << MAX8997_PWM_DUTY_SHIFT;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_DRVCONF, value);
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switch (chip->internal_mode_pattern) {
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case 0:
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value = chip->pattern_cycle << 4;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_CYCLECONF1, value);
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value = chip->pattern_signal_period;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGCONF1, value);
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break;
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case 1:
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value = chip->pattern_cycle;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_CYCLECONF1, value);
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value = chip->pattern_signal_period;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGCONF2, value);
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break;
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case 2:
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value = chip->pattern_cycle << 4;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_CYCLECONF2, value);
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value = chip->pattern_signal_period;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGCONF3, value);
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break;
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case 3:
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value = chip->pattern_cycle;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_CYCLECONF2, value);
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value = chip->pattern_signal_period;
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max8997_write_reg(chip->client,
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MAX8997_HAPTIC_REG_SIGCONF4, value);
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break;
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default:
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break;
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}
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}
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}
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static void max8997_haptic_enable(struct max8997_haptic *chip)
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{
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int error;
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mutex_lock(&chip->mutex);
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error = max8997_haptic_set_duty_cycle(chip);
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if (error) {
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dev_err(chip->dev, "set_pwm_cycle failed, error: %d\n", error);
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goto out;
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}
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if (!chip->enabled) {
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chip->enabled = true;
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regulator_enable(chip->regulator);
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max8997_haptic_configure(chip);
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if (chip->mode == MAX8997_EXTERNAL_MODE)
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pwm_enable(chip->pwm);
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}
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out:
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mutex_unlock(&chip->mutex);
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}
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static void max8997_haptic_disable(struct max8997_haptic *chip)
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{
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mutex_lock(&chip->mutex);
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if (chip->enabled) {
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chip->enabled = false;
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max8997_haptic_configure(chip);
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if (chip->mode == MAX8997_EXTERNAL_MODE)
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pwm_disable(chip->pwm);
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regulator_disable(chip->regulator);
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}
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mutex_unlock(&chip->mutex);
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}
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static void max8997_haptic_play_effect_work(struct work_struct *work)
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{
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struct max8997_haptic *chip =
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container_of(work, struct max8997_haptic, work);
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if (chip->level)
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max8997_haptic_enable(chip);
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else
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max8997_haptic_disable(chip);
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}
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static int max8997_haptic_play_effect(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct max8997_haptic *chip = input_get_drvdata(dev);
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chip->level = effect->u.rumble.strong_magnitude;
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if (!chip->level)
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chip->level = effect->u.rumble.weak_magnitude;
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schedule_work(&chip->work);
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return 0;
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}
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static void max8997_haptic_close(struct input_dev *dev)
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{
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struct max8997_haptic *chip = input_get_drvdata(dev);
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cancel_work_sync(&chip->work);
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max8997_haptic_disable(chip);
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}
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static int __devinit max8997_haptic_probe(struct platform_device *pdev)
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{
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struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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const struct max8997_platform_data *pdata =
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dev_get_platdata(iodev->dev);
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const struct max8997_haptic_platform_data *haptic_pdata =
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pdata->haptic_pdata;
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struct max8997_haptic *chip;
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struct input_dev *input_dev;
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int error;
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if (!haptic_pdata) {
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dev_err(&pdev->dev, "no haptic platform data\n");
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return -EINVAL;
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}
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chip = kzalloc(sizeof(struct max8997_haptic), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!chip || !input_dev) {
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dev_err(&pdev->dev, "unable to allocate memory\n");
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error = -ENOMEM;
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goto err_free_mem;
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}
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INIT_WORK(&chip->work, max8997_haptic_play_effect_work);
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mutex_init(&chip->mutex);
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chip->client = iodev->haptic;
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chip->dev = &pdev->dev;
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chip->input_dev = input_dev;
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chip->pwm_period = haptic_pdata->pwm_period;
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chip->type = haptic_pdata->type;
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chip->mode = haptic_pdata->mode;
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chip->pwm_divisor = haptic_pdata->pwm_divisor;
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switch (chip->mode) {
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case MAX8997_INTERNAL_MODE:
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chip->internal_mode_pattern =
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haptic_pdata->internal_mode_pattern;
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chip->pattern_cycle = haptic_pdata->pattern_cycle;
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chip->pattern_signal_period =
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haptic_pdata->pattern_signal_period;
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break;
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case MAX8997_EXTERNAL_MODE:
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chip->pwm = pwm_request(haptic_pdata->pwm_channel_id,
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"max8997-haptic");
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if (IS_ERR(chip->pwm)) {
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error = PTR_ERR(chip->pwm);
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dev_err(&pdev->dev,
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"unable to request PWM for haptic, error: %d\n",
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error);
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goto err_free_mem;
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}
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break;
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default:
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dev_err(&pdev->dev,
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"Invalid chip mode specified (%d)\n", chip->mode);
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error = -EINVAL;
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goto err_free_mem;
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}
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chip->regulator = regulator_get(&pdev->dev, "inmotor");
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if (IS_ERR(chip->regulator)) {
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error = PTR_ERR(chip->regulator);
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dev_err(&pdev->dev,
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"unable to get regulator, error: %d\n",
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error);
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goto err_free_pwm;
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}
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input_dev->name = "max8997-haptic";
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input_dev->id.version = 1;
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input_dev->dev.parent = &pdev->dev;
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input_dev->close = max8997_haptic_close;
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input_set_drvdata(input_dev, chip);
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input_set_capability(input_dev, EV_FF, FF_RUMBLE);
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error = input_ff_create_memless(input_dev, NULL,
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max8997_haptic_play_effect);
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if (error) {
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dev_err(&pdev->dev,
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"unable to create FF device, error: %d\n",
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error);
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goto err_put_regulator;
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}
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error = input_register_device(input_dev);
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if (error) {
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dev_err(&pdev->dev,
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"unable to register input device, error: %d\n",
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error);
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goto err_destroy_ff;
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}
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platform_set_drvdata(pdev, chip);
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return 0;
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err_destroy_ff:
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input_ff_destroy(input_dev);
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err_put_regulator:
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regulator_put(chip->regulator);
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err_free_pwm:
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if (chip->mode == MAX8997_EXTERNAL_MODE)
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pwm_free(chip->pwm);
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err_free_mem:
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input_free_device(input_dev);
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kfree(chip);
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return error;
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}
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static int __devexit max8997_haptic_remove(struct platform_device *pdev)
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{
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struct max8997_haptic *chip = platform_get_drvdata(pdev);
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input_unregister_device(chip->input_dev);
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regulator_put(chip->regulator);
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if (chip->mode == MAX8997_EXTERNAL_MODE)
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pwm_free(chip->pwm);
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kfree(chip);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int max8997_haptic_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct max8997_haptic *chip = platform_get_drvdata(pdev);
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max8997_haptic_disable(chip);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(max8997_haptic_pm_ops, max8997_haptic_suspend, NULL);
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static const struct platform_device_id max8997_haptic_id[] = {
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{ "max8997-haptic", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, max8997_haptic_id);
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static struct platform_driver max8997_haptic_driver = {
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.driver = {
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.name = "max8997-haptic",
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.owner = THIS_MODULE,
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.pm = &max8997_haptic_pm_ops,
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},
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.probe = max8997_haptic_probe,
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.remove = __devexit_p(max8997_haptic_remove),
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.id_table = max8997_haptic_id,
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};
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module_platform_driver(max8997_haptic_driver);
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MODULE_ALIAS("platform:max8997-haptic");
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MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
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MODULE_DESCRIPTION("max8997_haptic driver");
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MODULE_LICENSE("GPL");
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@ -131,6 +131,55 @@ struct max8997_muic_platform_data {
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int num_init_data;
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};
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enum max8997_haptic_motor_type {
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MAX8997_HAPTIC_ERM,
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MAX8997_HAPTIC_LRA,
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};
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enum max8997_haptic_pulse_mode {
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MAX8997_EXTERNAL_MODE,
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MAX8997_INTERNAL_MODE,
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};
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enum max8997_haptic_pwm_divisor {
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MAX8997_PWM_DIVISOR_32,
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MAX8997_PWM_DIVISOR_64,
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MAX8997_PWM_DIVISOR_128,
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MAX8997_PWM_DIVISOR_256,
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};
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/**
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* max8997_haptic_platform_data
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* @pwm_channel_id: channel number of PWM device
|
||||
* valid for MAX8997_EXTERNAL_MODE
|
||||
* @pwm_period: period in nano second for PWM device
|
||||
* valid for MAX8997_EXTERNAL_MODE
|
||||
* @type: motor type
|
||||
* @mode: pulse mode
|
||||
* MAX8997_EXTERNAL_MODE: external PWM device is used to control motor
|
||||
* MAX8997_INTERNAL_MODE: internal pulse generator is used to control motor
|
||||
* @pwm_divisor: divisor for external PWM device
|
||||
* @internal_mode_pattern: internal mode pattern for internal mode
|
||||
* [0 - 3]: valid pattern number
|
||||
* @pattern_cycle: the number of cycles of the waveform
|
||||
* for the internal mode pattern
|
||||
* [0 - 15]: available cycles
|
||||
* @pattern_signal_period: period of the waveform for the internal mode pattern
|
||||
* [0 - 255]: available period
|
||||
*/
|
||||
struct max8997_haptic_platform_data {
|
||||
unsigned int pwm_channel_id;
|
||||
unsigned int pwm_period;
|
||||
|
||||
enum max8997_haptic_motor_type type;
|
||||
enum max8997_haptic_pulse_mode mode;
|
||||
enum max8997_haptic_pwm_divisor pwm_divisor;
|
||||
|
||||
unsigned int internal_mode_pattern;
|
||||
unsigned int pattern_cycle;
|
||||
unsigned int pattern_signal_period;
|
||||
};
|
||||
|
||||
enum max8997_led_mode {
|
||||
MAX8997_NONE,
|
||||
MAX8997_FLASH_MODE,
|
||||
@ -192,7 +241,9 @@ struct max8997_platform_data {
|
||||
/* ---- MUIC ---- */
|
||||
struct max8997_muic_platform_data *muic_pdata;
|
||||
|
||||
/* HAPTIC: Not implemented */
|
||||
/* ---- HAPTIC ---- */
|
||||
struct max8997_haptic_platform_data *haptic_pdata;
|
||||
|
||||
/* RTC: Not implemented */
|
||||
/* ---- LED ---- */
|
||||
struct max8997_led_platform_data *led_pdata;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user