drivers/video/omap/lcd_omap2evm.c

   1 /*
   2  * LCD panel support for the MISTRAL OMAP2EVM board
   3  *
   4  * Author: Arun C <arunedarath@mistralsolutions.com>
   5  *
   6  * Derived from drivers/video/omap/lcd_omap3evm.c
   7  * Derived from drivers/video/omap/lcd-apollon.c
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/i2c/twl4030.h>
  27
  28 #include <mach/gpio.h>
  29 #include <mach/mux.h>
  30 #include <mach/omapfb.h>
  31 #include <asm/mach-types.h>
  32
  33 #define LCD_PANEL_ENABLE_GPIO   154
  34 #define LCD_PANEL_LR            128
  35 #define LCD_PANEL_UD            129
  36 #define LCD_PANEL_INI           152
  37 #define LCD_PANEL_QVGA          148
  38 #define LCD_PANEL_RESB          153
  39
  40 #define LCD_XRES                480
  41 #define LCD_YRES                640
  42 #define LCD_PIXCLOCK_MAX        20000 /* in kHz */
  43
  44 #define TWL_LED_LEDEN           0x00
  45 #define TWL_PWMA_PWMAON         0x00
  46 #define TWL_PWMA_PWMAOFF        0x01
  47
  48 static unsigned int bklight_level;
  49
  50 static int omap2evm_panel_init(struct lcd_panel *panel,
  51                                 struct omapfb_device *fbdev)
  52 {
  53         omap_request_gpio(LCD_PANEL_ENABLE_GPIO);
  54         omap_request_gpio(LCD_PANEL_LR);
  55         omap_request_gpio(LCD_PANEL_UD);
  56         omap_request_gpio(LCD_PANEL_INI);
  57         omap_request_gpio(LCD_PANEL_QVGA);
  58         omap_request_gpio(LCD_PANEL_RESB);
  59
  60         omap_set_gpio_direction(LCD_PANEL_ENABLE_GPIO, 0);
  61         omap_set_gpio_direction(LCD_PANEL_LR, 0);
  62         omap_set_gpio_direction(LCD_PANEL_UD, 0);
  63         omap_set_gpio_direction(LCD_PANEL_INI, 0);
  64         omap_set_gpio_direction(LCD_PANEL_QVGA, 0);
  65         omap_set_gpio_direction(LCD_PANEL_RESB, 0);
  66
  67         omap_set_gpio_dataout(LCD_PANEL_RESB, 1);
  68         omap_set_gpio_dataout(LCD_PANEL_INI, 1);
  69         omap_set_gpio_dataout(LCD_PANEL_QVGA, 0);
  70         omap_set_gpio_dataout(LCD_PANEL_LR, 1);
  71         omap_set_gpio_dataout(LCD_PANEL_UD, 1);
  72
  73         twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN);
  74         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON);
  75         twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF);
  76         bklight_level = 100;
  77
  78         return 0;
  79 }
  80
  81 static void omap2evm_panel_cleanup(struct lcd_panel *panel)
  82 {
  83 }
  84
  85 static int omap2evm_panel_enable(struct lcd_panel *panel)
  86 {
  87         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  88         return 0;
  89 }
  90
  91 static void omap2evm_panel_disable(struct lcd_panel *panel)
  92 {
  93         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  94 }
  95
  96 static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel)
  97 {
  98         return 0;
  99 }
 100
 101 static int omap2evm_bklight_setlevel(struct lcd_panel *panel,
 102                                                 unsigned int level)
 103 {
 104         u8 c;
 105         if ((level >= 0) && (level <= 100)) {
 106                 c = (125 * (100 - level)) / 100 + 2;
 107                 twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF);
 108                 bklight_level = level;
 109         }
 110         return 0;
 111 }
 112
 113 static unsigned int omap2evm_bklight_getlevel(struct lcd_panel *panel)
 114 {
 115         return bklight_level;
 116 }
 117
 118 static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel)
 119 {
 120         return 100;
 121 }
 122
 123 struct lcd_panel omap2evm_panel = {
 124         .name           = "omap2evm",
 125         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 126                           OMAP_LCDC_INV_HSYNC,
 127
 128         .bpp            = 16,
 129         .data_lines     = 18,
 130         .x_res          = LCD_XRES,
 131         .y_res          = LCD_YRES,
 132         .hsw            = 3,
 133         .hfp            = 0,
 134         .hbp            = 28,
 135         .vsw            = 2,
 136         .vfp            = 1,
 137         .vbp            = 0,
 138
 139         .pixel_clock    = LCD_PIXCLOCK_MAX,
 140
 141         .init           = omap2evm_panel_init,
 142         .cleanup        = omap2evm_panel_cleanup,
 143         .enable         = omap2evm_panel_enable,
 144         .disable        = omap2evm_panel_disable,
 145         .get_caps       = omap2evm_panel_get_caps,
 146         .set_bklight_level      = omap2evm_bklight_setlevel,
 147         .get_bklight_level      = omap2evm_bklight_getlevel,
 148         .get_bklight_max        = omap2evm_bklight_getmaxlevel,
 149 };
 150
 151 static int omap2evm_panel_probe(struct platform_device *pdev)
 152 {
 153         omapfb_register_panel(&omap2evm_panel);
 154         return 0;
 155 }
 156
 157 static int omap2evm_panel_remove(struct platform_device *pdev)
 158 {
 159         return 0;
 160 }
 161
 162 static int omap2evm_panel_suspend(struct platform_device *pdev,
 163                                    pm_message_t mesg)
 164 {
 165         return 0;
 166 }
 167
 168 static int omap2evm_panel_resume(struct platform_device *pdev)
 169 {
 170         return 0;
 171 }
 172
 173 struct platform_driver omap2evm_panel_driver = {
 174         .probe          = omap2evm_panel_probe,
 175         .remove         = omap2evm_panel_remove,
 176         .suspend        = omap2evm_panel_suspend,
 177         .resume         = omap2evm_panel_resume,
 178         .driver         = {
 179                 .name   = "omap2evm_lcd",
 180                 .owner  = THIS_MODULE,
 181         },
 182 };
 183
 184 static int __init omap2evm_panel_drv_init(void)
 185 {
 186         return platform_driver_register(&omap2evm_panel_driver);
 187 }
 188
 189 static void __exit omap2evm_panel_drv_exit(void)
 190 {
 191         platform_driver_unregister(&omap2evm_panel_driver);
 192 }
 193
 194 module_init(omap2evm_panel_drv_init);
 195 module_exit(omap2evm_panel_drv_exit);