204 lines
5.0 KiB
C
204 lines
5.0 KiB
C
/*
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* haptic motor driver for max77843_haptic.c
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*
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* Copyright (C) 2013 Ravi Shekhar Singh <shekhar.sr@samsung.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/hrtimer.h>
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#include <linux/pwm.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/i2c.h>
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#include <linux/regulator/consumer.h>
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#include <linux/mfd/max77843.h>
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#include <linux/mfd/max77843-private.h>
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#define MOTOR_EN (1<<6)
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#define MAX77843_REG_MAINCTRL1_BIASEN (1<<7)
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struct max77843_haptic_data {
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struct max77843_dev *max77843;
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struct i2c_client *i2c;
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struct max77843_haptic_platform_data *pdata;
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u8 reg;
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spinlock_t lock;
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bool running;
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};
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struct max77843_haptic_data *max77843_g_hap_data;
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static void max77843_haptic_i2c(struct max77843_haptic_data *hap_data, bool en)
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{
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int ret;
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u8 lscnfg_val = 0x00;
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if (en)
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lscnfg_val = MAX77843_REG_MAINCTRL1_BIASEN;
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ret = max77843_update_reg(hap_data->i2c, MAX77843_PMIC_REG_MAINCTRL1,
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lscnfg_val, MAX77843_REG_MAINCTRL1_BIASEN);
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if (ret)
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pr_err("[VIB] i2c REG_BIASEN update error %d\n", ret);
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if (en)
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ret = max77843_update_reg(hap_data->i2c, MAX77843_PMIC_REG_MCONFIG, MOTOR_EN, MOTOR_EN);
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else
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ret = max77843_update_reg(hap_data->i2c, MAX77843_PMIC_REG_MCONFIG, 0x0, MOTOR_EN);
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if (ret)
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pr_err("[VIB] i2c MOTOR_EN update error %d\n", ret);
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ret = max77843_update_reg(hap_data->i2c, MAX77843_PMIC_REG_MCONFIG, MOTOR_LRA, MOTOR_LRA);
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if (ret)
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pr_err("[VIB] i2c MOTOR_LPA update error %d\n", ret);
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}
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#ifdef CONFIG_SS_VIBRATOR
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void max77843_vibtonz_en(bool en)
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{
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if (max77843_g_hap_data == NULL) {
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return ;
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}
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if (en) {
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if (max77843_g_hap_data->running)
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return;
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max77843_haptic_i2c(max77843_g_hap_data, true);
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max77843_g_hap_data->running = true;
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} else {
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if (!max77843_g_hap_data->running)
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return;
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max77843_haptic_i2c(max77843_g_hap_data, false);
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max77843_g_hap_data->running = false;
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}
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}
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EXPORT_SYMBOL(max77843_vibtonz_en);
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#endif
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static int max77843_haptic_probe(struct platform_device *pdev)
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{
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int error = 0;
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struct max77843_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
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struct max77843_platform_data *max77843_pdata
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= dev_get_platdata(max77843->dev);
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#ifdef CONFIG_SS_VIBRATOR
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struct max77843_haptic_platform_data *pdata
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= max77843_pdata->haptic_data;
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#endif
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struct max77843_haptic_data *hap_data;
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pr_err("[VIB] ++ %s\n", __func__);
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if (pdata == NULL) {
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pr_err("%s: no pdata\n", __func__);
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return -ENODEV;
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}
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hap_data = kzalloc(sizeof(struct max77843_haptic_data), GFP_KERNEL);
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if (!hap_data)
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return -ENOMEM;
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max77843_g_hap_data = hap_data;
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max77843_g_hap_data->reg = MOTOR_LRA | DIVIDER_128;
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hap_data->max77843 = max77843;
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hap_data->i2c = max77843->i2c;
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hap_data->pdata = pdata;
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platform_set_drvdata(pdev, hap_data);
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spin_lock_init(&(hap_data->lock));
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pr_err("[VIB] -- %s\n", __func__);
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return error;
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}
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static int max77843_haptic_remove(struct platform_device *pdev)
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{
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struct max77843_haptic_data *data = platform_get_drvdata(pdev);
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int ret;
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pr_info("%s: Disable HAPTIC\n", __func__);
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ret = max77843_update_reg(data->i2c, MAX77843_PMIC_REG_MCONFIG, 0x0, MOTOR_EN);
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if (ret < 0) {
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pr_err("%s: fail to update reg\n", __func__);
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return -1;
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}
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kfree(data);
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max77843_g_hap_data = NULL;
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return 0;
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}
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void max77843_haptic_shutdown(struct device *dev)
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{
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struct max77843_haptic_data *data = dev_get_drvdata(dev);
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int ret;
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pr_info("%s: Disable HAPTIC\n", __func__);
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ret = max77843_update_reg(data->i2c, MAX77843_PMIC_REG_MCONFIG, 0x0, MOTOR_EN);
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if (ret < 0) {
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pr_err("%s: fail to update reg\n", __func__);
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return;
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}
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}
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static int max77843_haptic_suspend(struct platform_device *pdev,
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pm_message_t state)
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{
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struct max77843_haptic_data *data = platform_get_drvdata(pdev);
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int ret;
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pr_info("%s: Disable HAPTIC\n", __func__);
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ret = max77843_update_reg(data->i2c, MAX77843_PMIC_REG_MCONFIG, 0x0, MOTOR_EN);
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if (ret < 0) {
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pr_err("%s: fail to update reg\n", __func__);
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return -1;
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}
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return 0;
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}
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static int max77843_haptic_resume(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver max77843_haptic_driver = {
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.probe = max77843_haptic_probe,
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.remove = max77843_haptic_remove,
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.suspend = max77843_haptic_suspend,
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.resume = max77843_haptic_resume,
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.driver = {
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.name = "max77843-haptic",
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.owner = THIS_MODULE,
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.shutdown = max77843_haptic_shutdown,
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},
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};
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static int __init max77843_haptic_init(void)
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{
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pr_debug("[VIB] %s\n", __func__);
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return platform_driver_register(&max77843_haptic_driver);
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}
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module_init(max77843_haptic_init);
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static void __exit max77843_haptic_exit(void)
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{
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platform_driver_unregister(&max77843_haptic_driver);
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}
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module_exit(max77843_haptic_exit);
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MODULE_AUTHOR("Ravi Shekhar Singh <shekhar.sr@samsung.com>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("max77843 haptic driver");
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