Pileus Git - ~andy/linux/blob - drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c

   1 /*
   2  * LCD panel driver for Sharp LS037V7DW01
   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 #include <linux/device.h>
  23 #include <linux/fb.h>
  24 #include <linux/err.h>
  25 #include <linux/slab.h>
  26
  27 #include <video/omapdss.h>
  28
  29 struct sharp_data {
  30 };
  31
  32 static struct omap_video_timings sharp_ls_timings = {
  33         .x_res = 480,
  34         .y_res = 640,
  35
  36         .pixel_clock    = 19200,
  37
  38         .hsw            = 2,
  39         .hfp            = 1,
  40         .hbp            = 28,
  41
  42         .vsw            = 1,
  43         .vfp            = 1,
  44         .vbp            = 1,
  45
  46         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  47         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  48         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  49         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  50         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
  51 };
  52
  53
  54 static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
  55 {
  56         struct sharp_data *sd;
  57
  58         dssdev->panel.timings = sharp_ls_timings;
  59
  60         sd = kzalloc(sizeof(*sd), GFP_KERNEL);
  61         if (!sd)
  62                 return -ENOMEM;
  63
  64         dev_set_drvdata(&dssdev->dev, sd);
  65
  66         return 0;
  67 }
  68
  69 static void __exit sharp_ls_panel_remove(struct omap_dss_device *dssdev)
  70 {
  71         struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
  72
  73         kfree(sd);
  74 }
  75
  76 static int sharp_ls_power_on(struct omap_dss_device *dssdev)
  77 {
  78         int r = 0;
  79
  80         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
  81                 return 0;
  82
  83         omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
  84         omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
  85
  86         r = omapdss_dpi_display_enable(dssdev);
  87         if (r)
  88                 goto err0;
  89
  90         /* wait couple of vsyncs until enabling the LCD */
  91         msleep(50);
  92
  93         if (dssdev->platform_enable) {
  94                 r = dssdev->platform_enable(dssdev);
  95                 if (r)
  96                         goto err1;
  97         }
  98
  99         return 0;
 100 err1:
 101         omapdss_dpi_display_disable(dssdev);
 102 err0:
 103         return r;
 104 }
 105
 106 static void sharp_ls_power_off(struct omap_dss_device *dssdev)
 107 {
 108         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 109                 return;
 110
 111         if (dssdev->platform_disable)
 112                 dssdev->platform_disable(dssdev);
 113
 114         /* wait at least 5 vsyncs after disabling the LCD */
 115
 116         msleep(100);
 117
 118         omapdss_dpi_display_disable(dssdev);
 119 }
 120
 121 static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
 122 {
 123         int r;
 124         r = sharp_ls_power_on(dssdev);
 125         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 126         return r;
 127 }
 128
 129 static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
 130 {
 131         sharp_ls_power_off(dssdev);
 132         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 133 }
 134
 135 static struct omap_dss_driver sharp_ls_driver = {
 136         .probe          = sharp_ls_panel_probe,
 137         .remove         = __exit_p(sharp_ls_panel_remove),
 138
 139         .enable         = sharp_ls_panel_enable,
 140         .disable        = sharp_ls_panel_disable,
 141
 142         .driver         = {
 143                 .name   = "sharp_ls_panel",
 144                 .owner  = THIS_MODULE,
 145         },
 146 };
 147
 148 static int __init sharp_ls_panel_drv_init(void)
 149 {
 150         return omap_dss_register_driver(&sharp_ls_driver);
 151 }
 152
 153 static void __exit sharp_ls_panel_drv_exit(void)
 154 {
 155         omap_dss_unregister_driver(&sharp_ls_driver);
 156 }
 157
 158 module_init(sharp_ls_panel_drv_init);
 159 module_exit(sharp_ls_panel_drv_exit);
 160 MODULE_LICENSE("GPL");