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_MAX        41700 /* in pico seconds  */
  42 #define LCD_PIXCLOCK_MIN        38000 /* in pico seconds */
  43
  44 #define ENABLE_VDAC_DEDICATED   0x03
  45 #define ENABLE_VDAC_DEV_GRP     0x20
  46 #define ENABLE_VPLL2_DEDICATED  0x05
  47 #define ENABLE_VPLL2_DEV_GRP    0xE0
  48
  49 static int omap3evm_panel_init(struct lcd_panel *panel,
  50                                 struct omapfb_device *fbdev)
  51 {
  52         omap_request_gpio(LCD_PANEL_LR);
  53         omap_request_gpio(LCD_PANEL_UD);
  54         omap_request_gpio(LCD_PANEL_INI);
  55         omap_request_gpio(LCD_PANEL_RESB);
  56         omap_request_gpio(LCD_PANEL_QVGA);
  57
  58         omap_set_gpio_direction(LCD_PANEL_LR, 0);
  59         omap_set_gpio_direction(LCD_PANEL_UD, 0);
  60         omap_set_gpio_direction(LCD_PANEL_INI, 0);
  61         omap_set_gpio_direction(LCD_PANEL_RESB, 0);
  62         omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
  63
  64         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 0);
  65         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x7F, 1);
  66         twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 0);
  67         twl4030_i2c_write_u8(TWL4030_MODULE_PWMB, 0x7F, 1);
  68
  69         omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
  70         omap_set_gpio_dataout(LCD_PANEL_INI, 1);
  71         omap_set_gpio_dataout(LCD_PANEL_QVGA, 0);
  72         omap_set_gpio_dataout(LCD_PANEL_LR, 1);
  73         omap_set_gpio_dataout(LCD_PANEL_UD, 1);
  74
  75         return 0;
  76 }
  77
  78 static void omap3evm_panel_cleanup(struct lcd_panel *panel)
  79 {
  80 }
  81
  82 static int omap3evm_panel_enable(struct lcd_panel *panel)
  83 {
  84         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  85         return 0;
  86 }
  87
  88 static void omap3evm_panel_disable(struct lcd_panel *panel)
  89 {
  90         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  91 }
  92
  93 static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
  94 {
  95         return 0;
  96 }
  97
  98 struct lcd_panel omap3evm_panel = {
  99         .name           = "omap3evm",
 100         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 101                           OMAP_LCDC_INV_HSYNC,
 102
 103         .bpp            = 16,
 104         .data_lines     = 18,
 105         .x_res          = LCD_XRES,
 106         .y_res          = LCD_YRES,
 107         .hsw            = 3,            /* hsync_len (4) - 1 */
 108         .hfp            = 3,            /* right_margin (4) - 1 */
 109         .hbp            = 39,           /* left_margin (40) - 1 */
 110         .vsw            = 1,            /* vsync_len (2) - 1 */
 111         .vfp            = 2,            /* lower_margin */
 112         .vbp            = 7,            /* upper_margin (8) - 1 */
 113
 114         .pixel_clock    = LCD_PIXCLOCK_MAX,
 115
 116         .init           = omap3evm_panel_init,
 117         .cleanup        = omap3evm_panel_cleanup,
 118         .enable         = omap3evm_panel_enable,
 119         .disable        = omap3evm_panel_disable,
 120         .get_caps       = omap3evm_panel_get_caps,
 121 };
 122
 123 static int omap3evm_panel_probe(struct platform_device *pdev)
 124 {
 125         omapfb_register_panel(&omap3evm_panel);
 126         return 0;
 127 }
 128
 129 static int omap3evm_panel_remove(struct platform_device *pdev)
 130 {
 131         return 0;
 132 }
 133
 134 static int omap3evm_panel_suspend(struct platform_device *pdev,
 135                                    pm_message_t mesg)
 136 {
 137         return 0;
 138 }
 139
 140 static int omap3evm_panel_resume(struct platform_device *pdev)
 141 {
 142         return 0;
 143 }
 144
 145 struct platform_driver omap3evm_panel_driver = {
 146         .probe          = omap3evm_panel_probe,
 147         .remove         = omap3evm_panel_remove,
 148         .suspend        = omap3evm_panel_suspend,
 149         .resume         = omap3evm_panel_resume,
 150         .driver         = {
 151                 .name   = "omap3evm_lcd",
 152                 .owner  = THIS_MODULE,
 153         },
 154 };
 155
 156 static int __init omap3evm_panel_drv_init(void)
 157 {
 158         return platform_driver_register(&omap3evm_panel_driver);
 159 }
 160
 161 static void __exit omap3evm_panel_drv_exit(void)
 162 {
 163         platform_driver_unregister(&omap3evm_panel_driver);
 164 }
 165
 166 module_init(omap3evm_panel_drv_init);
 167 module_exit(omap3evm_panel_drv_exit);