release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/video/omap2/displays/panel-generic.c

   1 /*
   2  * Generic panel support
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/delay.h>
  22
  23 #include <plat/display.h>
  24
  25 static struct omap_video_timings generic_panel_timings = {
  26         /* 640 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
  27         .x_res          = 640,
  28         .y_res          = 480,
  29         .pixel_clock    = 23500,
  30         .hfp            = 48,
  31         .hsw            = 32,
  32         .hbp            = 80,
  33         .vfp            = 3,
  34         .vsw            = 4,
  35         .vbp            = 7,
  36 };
  37
  38 static int generic_panel_power_on(struct omap_dss_device *dssdev)
  39 {
  40         int r;
  41
  42         r = omapdss_dpi_display_enable(dssdev);
  43         if (r)
  44                 goto err0;
  45
  46         if (dssdev->platform_enable) {
  47                 r = dssdev->platform_enable(dssdev);
  48                 if (r)
  49                         goto err1;
  50         }
  51
  52         return 0;
  53 err1:
  54         omapdss_dpi_display_disable(dssdev);
  55 err0:
  56         return r;
  57 }
  58
  59 static void generic_panel_power_off(struct omap_dss_device *dssdev)
  60 {
  61         if (dssdev->platform_disable)
  62                 dssdev->platform_disable(dssdev);
  63
  64         omapdss_dpi_display_disable(dssdev);
  65 }
  66
  67 static int generic_panel_probe(struct omap_dss_device *dssdev)
  68 {
  69         dssdev->panel.config = OMAP_DSS_LCD_TFT;
  70         dssdev->panel.timings = generic_panel_timings;
  71
  72         return 0;
  73 }
  74
  75 static void generic_panel_remove(struct omap_dss_device *dssdev)
  76 {
  77 }
  78
  79 static int generic_panel_enable(struct omap_dss_device *dssdev)
  80 {
  81         int r = 0;
  82
  83         r = generic_panel_power_on(dssdev);
  84         if (r)
  85                 return r;
  86
  87         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
  88
  89         return 0;
  90 }
  91
  92 static void generic_panel_disable(struct omap_dss_device *dssdev)
  93 {
  94         generic_panel_power_off(dssdev);
  95
  96         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
  97 }
  98
  99 static int generic_panel_suspend(struct omap_dss_device *dssdev)
 100 {
 101         generic_panel_power_off(dssdev);
 102         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 103         return 0;
 104 }
 105
 106 static int generic_panel_resume(struct omap_dss_device *dssdev)
 107 {
 108         int r = 0;
 109
 110         r = generic_panel_power_on(dssdev);
 111         if (r)
 112                 return r;
 113
 114         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 115
 116         return 0;
 117 }
 118
 119 static void generic_panel_set_timings(struct omap_dss_device *dssdev,
 120                 struct omap_video_timings *timings)
 121 {
 122         dpi_set_timings(dssdev, timings);
 123 }
 124
 125 static void generic_panel_get_timings(struct omap_dss_device *dssdev,
 126                 struct omap_video_timings *timings)
 127 {
 128         *timings = dssdev->panel.timings;
 129 }
 130
 131 static int generic_panel_check_timings(struct omap_dss_device *dssdev,
 132                 struct omap_video_timings *timings)
 133 {
 134         return dpi_check_timings(dssdev, timings);
 135 }
 136
 137 static struct omap_dss_driver generic_driver = {
 138         .probe          = generic_panel_probe,
 139         .remove         = generic_panel_remove,
 140
 141         .enable         = generic_panel_enable,
 142         .disable        = generic_panel_disable,
 143         .suspend        = generic_panel_suspend,
 144         .resume         = generic_panel_resume,
 145
 146         .set_timings    = generic_panel_set_timings,
 147         .get_timings    = generic_panel_get_timings,
 148         .check_timings  = generic_panel_check_timings,
 149
 150         .driver         = {
 151                 .name   = "generic_panel",
 152                 .owner  = THIS_MODULE,
 153         },
 154 };
 155
 156 static int __init generic_panel_drv_init(void)
 157 {
 158         return omap_dss_register_driver(&generic_driver);
 159 }
 160
 161 static void __exit generic_panel_drv_exit(void)
 162 {
 163         omap_dss_unregister_driver(&generic_driver);
 164 }
 165
 166 module_init(generic_panel_drv_init);
 167 module_exit(generic_panel_drv_exit);
 168 MODULE_LICENSE("GPL");