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 <mach/gpio.h>
  28 #include <mach/mux.h>
  29 #include <mach/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 #define TWL_LED_LEDEN           0x00
  49 #define TWL_PWMA_PWMAON         0x00
  50 #define TWL_PWMA_PWMAOFF        0x01
  51
  52 static unsigned int bklight_level;
  53
  54 static int omap3evm_panel_init(struct lcd_panel *panel,
  55                                 struct omapfb_device *fbdev)
  56 {
  57         omap_request_gpio(LCD_PANEL_LR);
  58         omap_request_gpio(LCD_PANEL_UD);
  59         omap_request_gpio(LCD_PANEL_INI);
  60         omap_request_gpio(LCD_PANEL_RESB);
  61         omap_request_gpio(LCD_PANEL_QVGA);
  62
  63         omap_set_gpio_direction(LCD_PANEL_LR, 0);
  64         omap_set_gpio_direction(LCD_PANEL_UD, 0);
  65         omap_set_gpio_direction(LCD_PANEL_INI, 0);
  66         omap_set_gpio_direction(LCD_PANEL_RESB, 0);
  67         omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
  68
  69         twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
  70         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
  71         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
  72         bklight_level = 100;
  73
  74         omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
  75         omap_set_gpio_dataout(LCD_PANEL_INI, 1);
  76         omap_set_gpio_dataout(LCD_PANEL_QVGA, 0);
  77         omap_set_gpio_dataout(LCD_PANEL_LR, 1);
  78         omap_set_gpio_dataout(LCD_PANEL_UD, 1);
  79
  80         return 0;
  81 }
  82
  83 static void omap3evm_panel_cleanup(struct lcd_panel *panel)
  84 {
  85 }
  86
  87 static int omap3evm_panel_enable(struct lcd_panel *panel)
  88 {
  89         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  90         return 0;
  91 }
  92
  93 static void omap3evm_panel_disable(struct lcd_panel *panel)
  94 {
  95         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  96 }
  97
  98 static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel)
  99 {
 100         return 0;
 101 }
 102
 103 static int omap3evm_bklight_setlevel(struct lcd_panel *panel,
 104                                                 unsigned int level)
 105 {
 106         u8 c;
 107         if ((level >= 0) && (level <= 100)) {
 108                 c = (125 * (100 - level)) / 100 + 2;
 109                 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
 110                 bklight_level = level;
 111         }
 112         return 0;
 113 }
 114
 115 static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel)
 116 {
 117         return bklight_level;
 118 }
 119
 120 static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel)
 121 {
 122         return 100;
 123 }
 124
 125 struct lcd_panel omap3evm_panel = {
 126         .name           = "omap3evm",
 127         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 128                           OMAP_LCDC_INV_HSYNC,
 129
 130         .bpp            = 16,
 131         .data_lines     = 18,
 132         .x_res          = LCD_XRES,
 133         .y_res          = LCD_YRES,
 134         .hsw            = 3,            /* hsync_len (4) - 1 */
 135         .hfp            = 3,            /* right_margin (4) - 1 */
 136         .hbp            = 39,           /* left_margin (40) - 1 */
 137         .vsw            = 1,            /* vsync_len (2) - 1 */
 138         .vfp            = 2,            /* lower_margin */
 139         .vbp            = 7,            /* upper_margin (8) - 1 */
 140
 141         .pixel_clock    = LCD_PIXCLOCK,
 142
 143         .init           = omap3evm_panel_init,
 144         .cleanup        = omap3evm_panel_cleanup,
 145         .enable         = omap3evm_panel_enable,
 146         .disable        = omap3evm_panel_disable,
 147         .get_caps       = omap3evm_panel_get_caps,
 148         .set_bklight_level      = omap3evm_bklight_setlevel,
 149         .get_bklight_level      = omap3evm_bklight_getlevel,
 150         .get_bklight_max        = omap3evm_bklight_getmaxlevel,
 151 };
 152
 153 static int omap3evm_panel_probe(struct platform_device *pdev)
 154 {
 155         omapfb_register_panel(&omap3evm_panel);
 156         return 0;
 157 }
 158
 159 static int omap3evm_panel_remove(struct platform_device *pdev)
 160 {
 161         return 0;
 162 }
 163
 164 static int omap3evm_panel_suspend(struct platform_device *pdev,
 165                                    pm_message_t mesg)
 166 {
 167         return 0;
 168 }
 169
 170 static int omap3evm_panel_resume(struct platform_device *pdev)
 171 {
 172         return 0;
 173 }
 174
 175 struct platform_driver omap3evm_panel_driver = {
 176         .probe          = omap3evm_panel_probe,
 177         .remove         = omap3evm_panel_remove,
 178         .suspend        = omap3evm_panel_suspend,
 179         .resume         = omap3evm_panel_resume,
 180         .driver         = {
 181                 .name   = "omap3evm_lcd",
 182                 .owner  = THIS_MODULE,
 183         },
 184 };
 185
 186 static int __init omap3evm_panel_drv_init(void)
 187 {
 188         return platform_driver_register(&omap3evm_panel_driver);
 189 }
 190
 191 static void __exit omap3evm_panel_drv_exit(void)
 192 {
 193         platform_driver_unregister(&omap3evm_panel_driver);
 194 }
 195
 196 module_init(omap3evm_panel_drv_init);
 197 module_exit(omap3evm_panel_drv_exit);