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/*
* linux/arch/arm/mach-exynos/midas-wacom.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/wacom_i2c.h>
#include <linux/regulator/consumer.h>
#include <plat/gpio-cfg.h>
#ifdef CONFIG_CPU_FREQ_GOV_ONDEMAND_FLEXRATE
#include <linux/cpufreq.h>
#endif
static struct wacom_g5_callbacks *wacom_callbacks;
static int wacom_early_suspend_hw(void)
{
gpio_set_value(GPIO_PEN_RESET_N, 0);
#if defined(CONFIG_MACH_T0_EUR_OPEN)
if (system_rev >= 10)
gpio_direction_output(GPIO_WACOM_LDO_EN, 0);
else
gpio_direction_output(GPIO_WACOM_LDO_EN, 1);
#else
gpio_direction_output(GPIO_WACOM_LDO_EN, 0);
#endif
/* Set GPIO_PEN_IRQ to pull-up to reduce leakage */
s3c_gpio_setpull(GPIO_PEN_IRQ, S3C_GPIO_PULL_UP);
return 0;
}
static int wacom_late_resume_hw(void)
{
s3c_gpio_setpull(GPIO_PEN_IRQ, S3C_GPIO_PULL_NONE);
gpio_direction_output(GPIO_WACOM_LDO_EN, 1);
msleep(100);
gpio_set_value(GPIO_PEN_RESET_N, 1);
return 0;
}
static int wacom_suspend_hw(void)
{
return wacom_early_suspend_hw();
}
static int wacom_resume_hw(void)
{
return wacom_late_resume_hw();
}
static int wacom_reset_hw(void)
{
wacom_early_suspend_hw();
msleep(200);
wacom_late_resume_hw();
return 0;
}
static void wacom_register_callbacks(struct wacom_g5_callbacks *cb)
{
wacom_callbacks = cb;
};
static struct wacom_g5_platform_data wacom_platform_data = {
.x_invert = 1,
.y_invert = 0,
.xy_switch = 1,
.min_x = 0,
.max_x = WACOM_POSX_MAX,
.min_y = 0,
.max_y = WACOM_POSY_MAX,
.min_pressure = 0,
.max_pressure = WACOM_PRESSURE_MAX,
.gpio_pendct = GPIO_PEN_PDCT,
#ifdef WACOM_STATE_CHECK
#if defined(CONFIG_TARGET_LOCALE_KOR)
#if defined(CONFIG_MACH_T0) && defined(CONFIG_TDMB_ANT_DET)
.gpio_esd_check = GPIO_TDMB_ANT_DET_REV08,
#endif
#endif
#endif
/*.init_platform_hw = midas_wacom_init,*/
/* .exit_platform_hw =, */
.suspend_platform_hw = wacom_suspend_hw,
.resume_platform_hw = wacom_resume_hw,
.early_suspend_platform_hw = wacom_early_suspend_hw,
.late_resume_platform_hw = wacom_late_resume_hw,
.reset_platform_hw = wacom_reset_hw,
.register_cb = wacom_register_callbacks,
#ifdef WACOM_PEN_DETECT
.gpio_pen_insert = GPIO_WACOM_SENSE,
#endif
};
#if defined(CONFIG_MACH_T0_EUR_OPEN) ||\
(defined(CONFIG_TARGET_LOCALE_CHN) && !defined(CONFIG_MACH_T0_CHN_CTC))
/* I2C5 */
static struct i2c_board_info i2c_devs5[] __initdata = {
{
I2C_BOARD_INFO("wacom_g5sp_i2c", 0x56),
.platform_data = &wacom_platform_data,
},
};
#else
/* I2C2 */
static struct i2c_board_info i2c_devs2[] __initdata = {
{
I2C_BOARD_INFO("wacom_g5sp_i2c", 0x56),
.platform_data = &wacom_platform_data,
},
};
#endif
void __init midas_wacom_init(void)
{
int gpio;
int ret;
/*RESET*/
gpio = GPIO_PEN_RESET_N;
ret = gpio_request(gpio, "PEN_RESET");
s3c_gpio_cfgpin(gpio, S3C_GPIO_OUTPUT);
gpio_direction_output(gpio, 0);
/*SLP & FWE1*/
if (system_rev < WACOM_FWE1_HWID) {
printk(KERN_INFO "[E-PEN] Use SLP\n");
gpio = GPIO_PEN_SLP;
ret = gpio_request(gpio, "PEN_SLP");
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0x1));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
} else {
printk(KERN_INFO "[E-PEN] Use FWE\n");
gpio = GPIO_PEN_FWE1;
ret = gpio_request(gpio, "PEN_FWE1");
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0x1));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
gpio_direction_output(gpio, 0);
/*PDCT*/
gpio = GPIO_PEN_PDCT;
ret = gpio_request(gpio, "PEN_PDCT");
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf));
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_UP);
s5p_register_gpio_interrupt(gpio);
gpio_direction_input(gpio);
irq_set_irq_type(gpio_to_irq(gpio), IRQ_TYPE_EDGE_BOTH);
/*IRQ*/
gpio = GPIO_PEN_IRQ;
ret = gpio_request(gpio, "PEN_IRQ");
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
s5p_register_gpio_interrupt(gpio);
gpio_direction_input(gpio);
#if defined(CONFIG_MACH_T0_EUR_OPEN) ||\
(defined(CONFIG_TARGET_LOCALE_CHN) && !defined(CONFIG_MACH_T0_CHN_CTC))
i2c_devs5[0].irq = gpio_to_irq(gpio);
irq_set_irq_type(i2c_devs5[0].irq, IRQ_TYPE_EDGE_RISING);
#else
i2c_devs2[0].irq = gpio_to_irq(gpio);
irq_set_irq_type(i2c_devs2[0].irq, IRQ_TYPE_EDGE_RISING);
#endif
s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(0xf));
/*LDO_EN*/
gpio = GPIO_WACOM_LDO_EN;
ret = gpio_request(gpio, "PEN_LDO_EN");
s3c_gpio_cfgpin(gpio, S3C_GPIO_OUTPUT);
gpio_direction_output(gpio, 0);
#if defined(CONFIG_MACH_T0_EUR_OPEN) ||\
(defined(CONFIG_TARGET_LOCALE_CHN) && !defined(CONFIG_MACH_T0_CHN_CTC))
i2c_register_board_info(5, i2c_devs5, ARRAY_SIZE(i2c_devs5));
#else
i2c_register_board_info(2, i2c_devs2, ARRAY_SIZE(i2c_devs2));
#endif
printk(KERN_INFO "[E-PEN] : wacom IC initialized.\n");
}
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