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/*
* arch/arm/mach-tegra/board-touch-synaptics-spi.c
*
* Copyright (C) 2010-2012 NVIDIA Corporation
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/rmi.h>
#include "board.h"
#include "board-kai.h"
#define SYNAPTICS_SPI_CS 0
#define SYNAPTICS_BUTTON_CODES {KEY_HOME, KEY_BACK,}
static unsigned char synaptics_button_codes[] = SYNAPTICS_BUTTON_CODES;
static struct rmi_f19_button_map synaptics_button_map = {
.nbuttons = ARRAY_SIZE(synaptics_button_codes),
.map = synaptics_button_codes,
};
static int synaptics_touchpad_gpio_setup(void *gpio_data, bool configure)
{
if (configure) {
tegra_gpio_enable(SYNAPTICS_ATTN_GPIO);
gpio_request(SYNAPTICS_ATTN_GPIO, "synaptics-irq");
gpio_direction_input(SYNAPTICS_ATTN_GPIO);
tegra_gpio_enable(SYNAPTICS_RESET_GPIO);
gpio_request(SYNAPTICS_RESET_GPIO, "synaptics-reset");
gpio_direction_output(SYNAPTICS_RESET_GPIO, 0);
msleep(1);
gpio_set_value(SYNAPTICS_RESET_GPIO, 1);
msleep(100);
} else {
gpio_free(SYNAPTICS_ATTN_GPIO);
gpio_free(SYNAPTICS_RESET_GPIO);
tegra_gpio_disable(SYNAPTICS_ATTN_GPIO);
tegra_gpio_disable(SYNAPTICS_RESET_GPIO);
}
return 0;
}
static struct rmi_device_platform_data synaptics_platformdata = {
.driver_name = "rmi_generic",
.irq = SYNAPTICS_ATTN_GPIO,
.irq_polarity = RMI_IRQ_ACTIVE_LOW,
.gpio_config = synaptics_touchpad_gpio_setup,
.spi_data = {
.block_delay_us = 15,
.read_delay_us = 15,
.write_delay_us = 2,
},
.axis_align = {
.flip_y = true,
},
.button_map = &synaptics_button_map,
};
struct spi_board_info synaptics_2002_spi_board[] = {
{
.modalias = "rmi_spi",
.bus_num = 0,
.chip_select = 0,
.irq = 999, /* just to make sure this one is not being used */
.max_speed_hz = 1*1000*1000,
.mode = SPI_MODE_3,
.platform_data = &synaptics_platformdata,
},
};
int __init touch_init_synaptics_kai(void)
{
pr_info("%s: registering synaptics_2002_spi_board\n", __func__);
pr_info(" modalias = %s\n",
synaptics_2002_spi_board->modalias);
pr_info(" bus_num = %d\n",
synaptics_2002_spi_board->bus_num);
pr_info(" chip_select = %d\n",
synaptics_2002_spi_board->chip_select);
pr_info(" irq = %d\n",
synaptics_2002_spi_board->irq);
pr_info(" max_speed_hz = %d\n",
synaptics_2002_spi_board->max_speed_hz);
pr_info(" mode = %d\n",
synaptics_2002_spi_board->mode);
msleep(100);
spi_register_board_info(synaptics_2002_spi_board,
ARRAY_SIZE(synaptics_2002_spi_board));
return 0;
}
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