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/*
* Copyright (C) 2010 Texas Instruments Inc.
*
* Modified from mach-omap2/board-zoom-peripherals.c
*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/i2c/twl.h>
#include <linux/spi/spi.h>
#include <plat/mcspi.h>
#include <video/omapdss.h>
#define LCD_PANEL_RESET_GPIO_PROD 96
#define LCD_PANEL_RESET_GPIO_PILOT 55
#define LCD_PANEL_QVGA_GPIO 56
static void zoom_lcd_panel_init(void)
{
int ret;
unsigned char lcd_panel_reset_gpio;
lcd_panel_reset_gpio = (omap_rev() > OMAP3430_REV_ES3_0) ?
LCD_PANEL_RESET_GPIO_PROD :
LCD_PANEL_RESET_GPIO_PILOT;
ret = gpio_request(lcd_panel_reset_gpio, "lcd reset");
if (ret) {
pr_err("Failed to get LCD reset GPIO (gpio%d).\n",
lcd_panel_reset_gpio);
return;
}
gpio_direction_output(lcd_panel_reset_gpio, 1);
ret = gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga");
if (ret) {
pr_err("Failed to get LCD_PANEL_QVGA_GPIO (gpio%d).\n",
LCD_PANEL_QVGA_GPIO);
goto err0;
}
gpio_direction_output(LCD_PANEL_QVGA_GPIO, 1);
return;
err0:
gpio_free(lcd_panel_reset_gpio);
}
static int zoom_panel_enable_lcd(struct omap_dss_device *dssdev)
{
return 0;
}
static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev)
{
}
/*
* PWMA/B register offsets (TWL4030_MODULE_PWMA)
*/
#define TWL_INTBR_PMBR1 0xD
#define TWL_INTBR_GPBR1 0xC
#define TWL_LED_PWMON 0x0
#define TWL_LED_PWMOFF 0x1
static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level)
{
unsigned char c;
u8 mux_pwm, enb_pwm;
if (level > 100)
return -1;
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1);
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1);
if (level == 0) {
/* disable pwm1 output and clock */
enb_pwm = enb_pwm & 0xF5;
/* change pwm1 pin to gpio pin */
mux_pwm = mux_pwm & 0xCF;
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
enb_pwm, TWL_INTBR_GPBR1);
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
mux_pwm, TWL_INTBR_PMBR1);
return 0;
}
if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) {
/* change gpio pin to pwm1 pin */
mux_pwm = mux_pwm | 0x30;
/* enable pwm1 output and clock*/
enb_pwm = enb_pwm | 0x0A;
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
mux_pwm, TWL_INTBR_PMBR1);
twl_i2c_write_u8(TWL4030_MODULE_INTBR,
enb_pwm, TWL_INTBR_GPBR1);
}
c = ((50 * (100 - level)) / 100) + 1;
twl_i2c_write_u8(TWL4030_MODULE_PWM1, 0x7F, TWL_LED_PWMOFF);
twl_i2c_write_u8(TWL4030_MODULE_PWM1, c, TWL_LED_PWMON);
return 0;
}
static struct omap_dss_device zoom_lcd_device = {
.name = "lcd",
.driver_name = "NEC_8048_panel",
.type = OMAP_DISPLAY_TYPE_DPI,
.phy.dpi.data_lines = 24,
.platform_enable = zoom_panel_enable_lcd,
.platform_disable = zoom_panel_disable_lcd,
.max_backlight_level = 100,
.set_backlight = zoom_set_bl_intensity,
};
static struct omap_dss_device *zoom_dss_devices[] = {
&zoom_lcd_device,
};
static struct omap_dss_board_info zoom_dss_data = {
.num_devices = ARRAY_SIZE(zoom_dss_devices),
.devices = zoom_dss_devices,
.default_device = &zoom_lcd_device,
};
static struct omap2_mcspi_device_config dss_lcd_mcspi_config = {
.turbo_mode = 1,
.single_channel = 1, /* 0: slave, 1: master */
};
static struct spi_board_info nec_8048_spi_board_info[] __initdata = {
[0] = {
.modalias = "nec_8048_spi",
.bus_num = 1,
.chip_select = 2,
.max_speed_hz = 375000,
.controller_data = &dss_lcd_mcspi_config,
},
};
void __init zoom_display_init(void)
{
omap_display_init(&zoom_dss_data);
spi_register_board_info(nec_8048_spi_board_info,
ARRAY_SIZE(nec_8048_spi_board_info));
zoom_lcd_panel_init();
}
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