/*
* LCD panel support for the TI LDP board
*
* Copyright (C) 2007 WindRiver
* Author: Stanley Miao <stanley.miao@windriver.com>
*
* Derived from drivers/video/omap/lcd-2430sdp.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/delay.h>
#include <linux/i2c/twl4030.h>
#include <mach/gpio.h>
#include <mach/mux.h>
#include <mach/omapfb.h>
#include <asm/mach-types.h>
#define LCD_PANEL_BACKLIGHT_GPIO (15 + OMAP_MAX_GPIO_LINES)
#define LCD_PANEL_ENABLE_GPIO (7 + OMAP_MAX_GPIO_LINES)
#define LCD_PANEL_RESET_GPIO 55
#define LCD_PANEL_QVGA_GPIO 56
#ifdef CONFIG_FB_OMAP_LCD_VGA
#define LCD_XRES 480
#define LCD_YRES 640
#define LCD_PIXCLOCK_MAX 41700
#else
#define LCD_XRES 240
#define LCD_YRES 320
#define LCD_PIXCLOCK_MAX 185186
#endif
#define PM_RECEIVER TWL4030_MODULE_PM_RECEIVER
#define ENABLE_VAUX2_DEDICATED 0x09
#define ENABLE_VAUX2_DEV_GRP 0x20
#define ENABLE_VAUX3_DEDICATED 0x03
#define ENABLE_VAUX3_DEV_GRP 0x20
#define ENABLE_VPLL2_DEDICATED 0x05
#define ENABLE_VPLL2_DEV_GRP 0xE0
#define TWL4030_VPLL2_DEV_GRP 0x33
#define TWL4030_VPLL2_DEDICATED 0x36
#define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
static int ldp_panel_init(struct lcd_panel *panel,
struct omapfb_device *fbdev)
{
gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset");
gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga");
gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel");
gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight");
gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0);
gpio_direction_output(LCD_PANEL_RESET_GPIO, 0);
gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
#ifdef CONFIG_FB_OMAP_LCD_VGA
gpio_set_value(LCD_PANEL_QVGA_GPIO, 0);
#else
gpio_set_value(LCD_PANEL_QVGA_GPIO, 1);
#endif
gpio_set_value(LCD_PANEL_RESET_GPIO, 1);
return 0;
}
static void ldp_panel_cleanup(struct lcd_panel *panel)
{
gpio_free(LCD_PANEL_BACKLIGHT_GPIO);
gpio_free(LCD_PANEL_ENABLE_GPIO);
gpio_free(LCD_PANEL_QVGA_GPIO);
gpio_free(LCD_PANEL_RESET_GPIO);
}
static int ldp_panel_enable(struct lcd_panel *panel)
{
if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
TWL4030_VPLL2_DEDICATED))
return -EIO;
if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
TWL4030_VPLL2_DEV_GRP))
return -EIO;
gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1);
if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED,
TWL4030_VAUX3_DEDICATED))
return -EIO;
if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP,
TWL4030_VAUX3_DEV_GRP))
return -EIO;
return 0;
}
static void ldp_panel_disable(struct lcd_panel *panel)
{
gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
msleep(4);
}
static unsigned long ldp_panel_get_caps(struct lcd_panel *panel)
{
return 0;
}
struct lcd_panel ldp_panel = {
.name = "ldp",
.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
OMAP_LCDC_INV_HSYNC,
.bpp = 16,
.data_lines = 18,
.x_res = LCD_XRES,
.y_res = LCD_YRES,
.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 = LCD_PIXCLOCK_MAX,
.init = ldp_panel_init,
.cleanup = ldp_panel_cleanup,
.enable = ldp_panel_enable,
.disable = ldp_panel_disable,
.get_caps = ldp_panel_get_caps,
};
static int ldp_panel_probe(struct platform_device *pdev)
{
omapfb_register_panel(&ldp_panel);
return 0;
}
static int ldp_panel_remove(struct platform_device *pdev)
{
return 0;
}
static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
{
return 0;
}
static int ldp_panel_resume(struct platform_device *pdev)
{
return 0;
}
struct platform_driver ldp_panel_driver = {
.probe = ldp_panel_probe,
.remove = ldp_panel_remove,
.suspend = ldp_panel_suspend,
.resume = ldp_panel_resume,
.driver = {
.name = "ldp_lcd",
.owner = THIS_MODULE,
},
};
static int __init ldp_panel_drv_init(void)
{
return platform_driver_register(&ldp_panel_driver);
}
static void __exit ldp_panel_drv_exit(void)
{
platform_driver_unregister(&ldp_panel_driver);
}
module_init(ldp_panel_drv_init);
module_exit(ldp_panel_drv_exit);
