/*
* LCD panel support for the TI OMAP3 EVM board
*
* Author: Steve Sakoman <steve@sakoman.com>
*
* Derived from drivers/video/omap/lcd-apollon.c
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/i2c/twl4030.h>
#include <mach/mux.h>
#include <mach/omapfb.h>
#include <asm/mach-types.h>
#define LCD_PANEL_ENABLE_GPIO 153
#define LCD_PANEL_LR 2
#define LCD_PANEL_UD 3
#define LCD_PANEL_INI 152
#define LCD_PANEL_QVGA 154
#define LCD_PANEL_RESB 155
#define ENABLE_VDAC_DEDICATED 0x03
#define ENABLE_VDAC_DEV_GRP 0x20
#define ENABLE_VPLL2_DEDICATED 0x05
#define ENABLE_VPLL2_DEV_GRP 0xE0
#define TWL_LED_LEDEN 0x00
#define TWL_PWMA_PWMAON 0x00
#define TWL_PWMA_PWMAOFF 0x01
static unsigned int bklight_level;
static int omap3evm_panel_init(struct lcd_panel *panel,
struct omapfb_device *fbdev)
{
gpio_request(LCD_PANEL_LR, "LCD lr");
gpio_request(LCD_PANEL_UD, "LCD ud");
gpio_request(LCD_PANEL_INI, "LCD ini");
gpio_request(LCD_PANEL_RESB, "LCD resb");
gpio_request(LCD_PANEL_QVGA, "LCD qvga");
gpio_direction_output(LCD_PANEL_RESB, 1);
gpio_direction_output(LCD_PANEL_INI, 1);
gpio_direction_output(LCD_PANEL_QVGA, 0);
gpio_direction_output(LCD_PANEL_LR, 1);
gpio_direction_output(LCD_PANEL_UD, 1);
twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
bklight_level = 100;
return 0;
}
static void omap3evm_panel_cleanup(struct lcd_panel *panel)
{
gpio_free(LCD_PANEL_QVGA);
gpio_free(LCD_PANEL_RESB);
gpio_free(LCD_PANEL_INI);
gpio_free(LCD_PANEL_UD);
gpio_free(LCD_PANEL_LR);
}
static int omap3evm_panel_enable(struct lcd_panel *panel)
{
gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0);
return 0;
}
static void omap3evm_panel_disable(struct lcd_panel *panel)
{
gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1);
}
static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
{
return 0;
}
static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
unsigned int level)
{
u8 c;
if ((level >= 0) && (level <= 100)) {
c = (125 * (100 - level)) / 100 + 2;
twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
bklight_level = level;
}
return 0;
}
static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
{
return bklight_level;
}
static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
{
return 100;
}
struct lcd_panel omap3evm_panel = {
.name = "omap3evm",
.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
OMAP_LCDC_INV_HSYNC,
.bpp = 16,
.data_lines = 18,
.x_res = 480,
.y_res = 640,
.hsw = 3, /* hsync_len (4) - 1 */
.hfp = 3, /* right_margin (4) - 1 */
.hbp = 39, /* left_margin (40) - 1 */
.vsw = 1, /* vsync_len (2) - 1 */
.vfp = 2, /* lower_margin */
.vbp = 7, /* upper_margin (8) - 1 */
.pixel_clock = 26000,
.init = omap3evm_panel_init,
.cleanup = omap3evm_panel_cleanup,
.enable = omap3evm_panel_enable,
.disable = omap3evm_panel_disable,
.get_caps = omap3evm_panel_get_caps,
.set_bklight_level = omap3evm_bklight_setlevel,
.get_bklight_level = omap3evm_bklight_getlevel,
.get_bklight_max = omap3evm_bklight_getmaxlevel,
};
static int omap3evm_panel_probe(struct platform_device *pdev)
{
omapfb_register_panel(&omap3evm_panel);
return 0;
}
static int omap3evm_panel_remove(struct platform_device *pdev)
{
return 0;
}
static int omap3evm_panel_suspend(struct platform_device *pdev,
pm_message_t mesg)
{
return 0;
}
static int omap3evm_panel_resume(struct platform_device *pdev)
{
return 0;
}
struct platform_driver omap3evm_panel_driver = {
.probe = omap3evm_panel_probe,
.remove = omap3evm_panel_remove,
.suspend = omap3evm_panel_suspend,
.resume = omap3evm_panel_resume,
.driver = {
.name = "omap3evm_lcd",
.owner = THIS_MODULE,
},
};
static int __init omap3evm_panel_drv_init(void)
{
return platform_driver_register(&omap3evm_panel_driver);
}
static void __exit omap3evm_panel_drv_exit(void)
{
platform_driver_unregister(&omap3evm_panel_driver);
}
module_init(omap3evm_panel_drv_init);
module_exit(omap3evm_panel_drv_exit);
