diff options
Diffstat (limited to 'drivers/video/omap/lcd_omap2evm.c')
| -rw-r--r-- | drivers/video/omap/lcd_omap2evm.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/video/omap/lcd_omap2evm.c b/drivers/video/omap/lcd_omap2evm.c new file mode 100644 index 00000000000..7a2bbe2ecec --- /dev/null +++ b/drivers/video/omap/lcd_omap2evm.c @@ -0,0 +1,191 @@ +/* + * LCD panel support for the MISTRAL OMAP2EVM board + * + * Author: Arun C <arunedarath@mistralsolutions.com> + * + * Derived from drivers/video/omap/lcd_omap3evm.c + * 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 154 +#define LCD_PANEL_LR 128 +#define LCD_PANEL_UD 129 +#define LCD_PANEL_INI 152 +#define LCD_PANEL_QVGA 148 +#define LCD_PANEL_RESB 153 + +#define TWL_LED_LEDEN 0x00 +#define TWL_PWMA_PWMAON 0x00 +#define TWL_PWMA_PWMAOFF 0x01 + +static unsigned int bklight_level; + +static int omap2evm_panel_init(struct lcd_panel *panel, + struct omapfb_device *fbdev) +{ + gpio_request(LCD_PANEL_ENABLE_GPIO, "LCD enable"); + 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_QVGA, "LCD qvga"); + gpio_request(LCD_PANEL_RESB, "LCD resb"); + + gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1); + 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 omap2evm_panel_cleanup(struct lcd_panel *panel) +{ + gpio_free(LCD_PANEL_RESB); + gpio_free(LCD_PANEL_QVGA); + gpio_free(LCD_PANEL_INI); + gpio_free(LCD_PANEL_UD); + gpio_free(LCD_PANEL_LR); + gpio_free(LCD_PANEL_ENABLE_GPIO); +} + +static int omap2evm_panel_enable(struct lcd_panel *panel) +{ + gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0); + return 0; +} + +static void omap2evm_panel_disable(struct lcd_panel *panel) +{ + gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1); +} + +static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel) +{ + return 0; +} + +static int omap2evm_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 omap2evm_bklight_getlevel(struct lcd_panel *panel) +{ + return bklight_level; +} + +static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel) +{ + return 100; +} + +struct lcd_panel omap2evm_panel = { + .name = "omap2evm", + .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, + .hfp = 0, + .hbp = 28, + .vsw = 2, + .vfp = 1, + .vbp = 0, + + .pixel_clock = 20000, + + .init = omap2evm_panel_init, + .cleanup = omap2evm_panel_cleanup, + .enable = omap2evm_panel_enable, + .disable = omap2evm_panel_disable, + .get_caps = omap2evm_panel_get_caps, + .set_bklight_level = omap2evm_bklight_setlevel, + .get_bklight_level = omap2evm_bklight_getlevel, + .get_bklight_max = omap2evm_bklight_getmaxlevel, +}; + +static int omap2evm_panel_probe(struct platform_device *pdev) +{ + omapfb_register_panel(&omap2evm_panel); + return 0; +} + +static int omap2evm_panel_remove(struct platform_device *pdev) +{ + return 0; +} + +static int omap2evm_panel_suspend(struct platform_device *pdev, + pm_message_t mesg) +{ + return 0; +} + +static int omap2evm_panel_resume(struct platform_device *pdev) +{ + return 0; +} + +struct platform_driver omap2evm_panel_driver = { + .probe = omap2evm_panel_probe, + .remove = omap2evm_panel_remove, + .suspend = omap2evm_panel_suspend, + .resume = omap2evm_panel_resume, + .driver = { + .name = "omap2evm_lcd", + .owner = THIS_MODULE, + }, +}; + +static int __init omap2evm_panel_drv_init(void) +{ + return platform_driver_register(&omap2evm_panel_driver); +} + +static void __exit omap2evm_panel_drv_exit(void) +{ + platform_driver_unregister(&omap2evm_panel_driver); +} + +module_init(omap2evm_panel_drv_init); +module_exit(omap2evm_panel_drv_exit); |