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