drivers/video/omap/lcd_omap3evm.c

   1 /*
   2  * LCD panel support for the TI OMAP3 EVM board
   3  *
   4  * Author: Steve Sakoman <steve@sakoman.com>
   5  *
   6  * Derived from drivers/video/omap/lcd-apollon.c
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/i2c/twl4030.h>
  26
  27 #include <asm/arch/gpio.h>
  28 #include <asm/arch/mux.h>
  29 #include <asm/arch/omapfb.h>
  30 #include <asm/mach-types.h>
  31
  32 #define LCD_PANEL_ENABLE_GPIO       153
  33 #define LCD_PANEL_LR                2
  34 #define LCD_PANEL_UD                3
  35 #define LCD_PANEL_INI               152
  36 #define LCD_PANEL_QVGA              154
  37 #define LCD_PANEL_RESB              155
  38
  39 #define LCD_XRES                480
  40 #define LCD_YRES                640
  41 #define LCD_PIXCLOCK            26000 /* in kHz  */
  42
  43 #define ENABLE_VDAC_DEDICATED   0x03
  44 #define ENABLE_VDAC_DEV_GRP     0x20
  45 #define ENABLE_VPLL2_DEDICATED  0x05
  46 #define ENABLE_VPLL2_DEV_GRP    0xE0
  47
  48 static int omap3evm_panel_init(struct lcd_panel *panel,
  49                                 struct omapfb_device *fbdev)
  50 {
  51         omap_request_gpio(LCD_PANEL_LR);
  52         omap_request_gpio(LCD_PANEL_UD);
  53         omap_request_gpio(LCD_PANEL_INI);
  54         omap_request_gpio(LCD_PANEL_RESB);
  55         omap_request_gpio(LCD_PANEL_QVGA);
  56
  57         omap_set_gpio_direction(LCD_PANEL_LR, 0);
  58         omap_set_gpio_direction(LCD_PANEL_UD, 0);
  59         omap_set_gpio_direction(LCD_PANEL_INI, 0);
  60         omap_set_gpio_direction(LCD_PANEL_RESB, 0);
  61         omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
  62
  63         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 0);
  64         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 1);
  65         twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 0);
  66         twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 1);
  67
  68         omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
  69         omap_set_gpio_dataout(LCD_PANEL_INI, 1);
  70         omap_set_gpio_dataout(LCD_PANEL_QVGA, 0);
  71         omap_set_gpio_dataout(LCD_PANEL_LR, 1);
  72         omap_set_gpio_dataout(LCD_PANEL_UD, 1);
  73
  74         return 0;
  75 }
  76
  77 static void omap3evm_panel_cleanup(struct lcd_panel *panel)
  78 {
  79 }
  80
  81 static int omap3evm_panel_enable(struct lcd_panel *panel)
  82 {
  83         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  84         return 0;
  85 }
  86
  87 static void omap3evm_panel_disable(struct lcd_panel *panel)
  88 {
  89         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  90 }
  91
  92 static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
  93 {
  94         return 0;
  95 }
  96
  97 struct lcd_panel omap3evm_panel = {
  98         .name           = "omap3evm",
  99         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 100                           OMAP_LCDC_INV_HSYNC,
 101
 102         .bpp            = 16,
 103         .data_lines     = 18,
 104         .x_res          = LCD_XRES,
 105         .y_res          = LCD_YRES,
 106         .hsw            = 3,            /* hsync_len (4) - 1 */
 107         .hfp            = 3,            /* right_margin (4) - 1 */
 108         .hbp            = 39,           /* left_margin (40) - 1 */
 109         .vsw            = 1,            /* vsync_len (2) - 1 */
 110         .vfp            = 2,            /* lower_margin */
 111         .vbp            = 7,            /* upper_margin (8) - 1 */
 112
 113         .pixel_clock    = LCD_PIXCLOCK,
 114
 115         .init           = omap3evm_panel_init,
 116         .cleanup        = omap3evm_panel_cleanup,
 117         .enable         = omap3evm_panel_enable,
 118         .disable        = omap3evm_panel_disable,
 119         .get_caps       = omap3evm_panel_get_caps,
 120 };
 121
 122 static int omap3evm_panel_probe(struct platform_device *pdev)
 123 {
 124         omapfb_register_panel(&omap3evm_panel);
 125         return 0;
 126 }
 127
 128 static int omap3evm_panel_remove(struct platform_device *pdev)
 129 {
 130         return 0;
 131 }
 132
 133 static int omap3evm_panel_suspend(struct platform_device *pdev,
 134                                    pm_message_t mesg)
 135 {
 136         return 0;
 137 }
 138
 139 static int omap3evm_panel_resume(struct platform_device *pdev)
 140 {
 141         return 0;
 142 }
 143
 144 struct platform_driver omap3evm_panel_driver = {
 145         .probe          = omap3evm_panel_probe,
 146         .remove         = omap3evm_panel_remove,
 147         .suspend        = omap3evm_panel_suspend,
 148         .resume         = omap3evm_panel_resume,
 149         .driver         = {
 150                 .name   = "omap3evm_lcd",
 151                 .owner  = THIS_MODULE,
 152         },
 153 };
 154
 155 static int __init omap3evm_panel_drv_init(void)
 156 {
 157         return platform_driver_register(&omap3evm_panel_driver);
 158 }
 159
 160 static void __exit omap3evm_panel_drv_exit(void)
 161 {
 162         platform_driver_unregister(&omap3evm_panel_driver);
 163 }
 164
 165 module_init(omap3evm_panel_drv_init);
 166 module_exit(omap3evm_panel_drv_exit);