drivers/video/omap/lcd_overo.c

   1 /*
   2  * LCD panel support for the Gumstix Overo
   3  *
   4  * Author: Steve Sakoman <steve@sakoman.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/i2c/twl4030.h>
  25
  26 #include <mach/gpio.h>
  27 #include <mach/mux.h>
  28 #include <mach/omapfb.h>
  29 #include <asm/mach-types.h>
  30
  31 #define LCD_ENABLE       144
  32
  33 static int overo_panel_init(struct lcd_panel *panel,
  34                                 struct omapfb_device *fbdev)
  35 {
  36         if ((gpio_request(LCD_ENABLE, "LCD_ENABLE") == 0) &&
  37             (gpio_direction_output(LCD_ENABLE, 1) == 0))
  38                 gpio_export(LCD_ENABLE, 0);
  39         else
  40                 printk(KERN_ERR "could not obtain gpio for LCD_ENABLE\n");
  41
  42         return 0;
  43 }
  44
  45 static void overo_panel_cleanup(struct lcd_panel *panel)
  46 {
  47         gpio_free(LCD_ENABLE);
  48 }
  49
  50 static int overo_panel_enable(struct lcd_panel *panel)
  51 {
  52         gpio_set_value(LCD_ENABLE, 1);
  53         return 0;
  54 }
  55
  56 static void overo_panel_disable(struct lcd_panel *panel)
  57 {
  58         gpio_set_value(LCD_ENABLE, 0);
  59 }
  60
  61 static unsigned long overo_panel_get_caps(struct lcd_panel *panel)
  62 {
  63         return 0;
  64 }
  65
  66 struct lcd_panel overo_panel = {
  67         .name           = "overo",
  68         .config         = OMAP_LCDC_PANEL_TFT,
  69         .bpp            = 16,
  70         .data_lines     = 24,
  71
  72 #if defined CONFIG_FB_OMAP_031M3R
  73
  74         /* 640 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
  75         .x_res          = 640,
  76         .y_res          = 480,
  77         .hfp            = 48,
  78         .hsw            = 32,
  79         .hbp            = 80,
  80         .vfp            = 3,
  81         .vsw            = 4,
  82         .vbp            = 7,
  83         .pixel_clock    = 23500,
  84
  85 #elif defined CONFIG_FB_OMAP_048M3R
  86
  87         /* 800 x 600 @ 60 Hz  Reduced blanking VESA CVT 0.48M3-R */
  88         .x_res          = 800,
  89         .y_res          = 600,
  90         .hfp            = 48,
  91         .hsw            = 32,
  92         .hbp            = 80,
  93         .vfp            = 3,
  94         .vsw            = 4,
  95         .vbp            = 11,
  96         .pixel_clock    = 35500,
  97
  98 #elif defined CONFIG_FB_OMAP_079M3R
  99
 100         /* 1024 x 768 @ 60 Hz  Reduced blanking VESA CVT 0.79M3-R */
 101         .x_res          = 1024,
 102         .y_res          = 768,
 103         .hfp            = 48,
 104         .hsw            = 32,
 105         .hbp            = 80,
 106         .vfp            = 3,
 107         .vsw            = 4,
 108         .vbp            = 15,
 109         .pixel_clock    = 56000,
 110
 111 #elif defined CONFIG_FB_OMAP_092M9R
 112
 113         /* 1280 x 720 @ 60 Hz  Reduced blanking VESA CVT 0.92M9-R */
 114         .x_res          = 1280,
 115         .y_res          = 720,
 116         .hfp            = 48,
 117         .hsw            = 32,
 118         .hbp            = 80,
 119         .vfp            = 3,
 120         .vsw            = 5,
 121         .vbp            = 13,
 122         .pixel_clock    = 64000,
 123
 124 #else
 125
 126         /* use 640 x 480 if no config option */
 127         /* 640 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
 128         .x_res          = 640,
 129         .y_res          = 480,
 130         .hfp            = 48,
 131         .hsw            = 32,
 132         .hbp            = 80,
 133         .vfp            = 3,
 134         .vsw            = 4,
 135         .vbp            = 7,
 136         .pixel_clock    = 23500,
 137
 138 #endif
 139
 140         .init           = overo_panel_init,
 141         .cleanup        = overo_panel_cleanup,
 142         .enable         = overo_panel_enable,
 143         .disable        = overo_panel_disable,
 144         .get_caps       = overo_panel_get_caps,
 145 };
 146
 147 static int overo_panel_probe(struct platform_device *pdev)
 148 {
 149         omapfb_register_panel(&overo_panel);
 150         return 0;
 151 }
 152
 153 static int overo_panel_remove(struct platform_device *pdev)
 154 {
 155         /* omapfb does not have unregister_panel */
 156         return 0;
 157 }
 158
 159 static struct platform_driver overo_panel_driver = {
 160         .probe          = overo_panel_probe,
 161         .remove         = overo_panel_remove,
 162         .driver         = {
 163                 .name   = "overo_lcd",
 164                 .owner  = THIS_MODULE,
 165         },
 166 };
 167
 168 static int __init overo_panel_drv_init(void)
 169 {
 170         return platform_driver_register(&overo_panel_driver);
 171 }
 172
 173 static void __exit overo_panel_drv_exit(void)
 174 {
 175         platform_driver_unregister(&overo_panel_driver);
 176 }
 177
 178 module_init(overo_panel_drv_init);
 179 module_exit(overo_panel_drv_exit);