drivers/video/omap/lcd_2430sdp.c

   1 /*
   2  * LCD panel support for the TI 2430SDP board
   3  *
   4  * Copyright (C) 2007 MontaVista
   5  * Author: Hunyue Yau <hyau@mvista.com>
   6  *
   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
  27 #include <asm/arch/gpio.h>
  28 #include <asm/arch/mux.h>
  29 #include <asm/arch/omapfb.h>
  30 #include <asm/arch/twl4030.h>
  31
  32 #define LCD_PANEL_BACKLIGHT_GPIO        91
  33 #define LCD_PANEL_ENABLE_GPIO           154
  34 #define LCD_PIXCLOCK_MAX                5400 /* freq 5.4 MHz */
  35 #define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
  36 #define ENABLE_VAUX2_DEDICATED  0x09
  37 #define ENABLE_VAUX2_DEV_GRP    0x20
  38
  39
  40 #define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
  41
  42
  43 static int sdp2430_panel_init(struct lcd_panel *panel,
  44                                 struct omapfb_device *fbdev)
  45 {
  46         omap_request_gpio(LCD_PANEL_ENABLE_GPIO);       /* LCD panel */
  47         omap_request_gpio(LCD_PANEL_BACKLIGHT_GPIO);    /* LCD backlight */
  48         omap_set_gpio_direction(LCD_PANEL_ENABLE_GPIO, 0);      /* output */
  49         omap_set_gpio_direction(LCD_PANEL_BACKLIGHT_GPIO, 0);   /* output */
  50
  51         return 0;
  52 }
  53
  54 static void sdp2430_panel_cleanup(struct lcd_panel *panel)
  55 {
  56 }
  57
  58 static int sdp2430_panel_enable(struct lcd_panel *panel)
  59 {
  60         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  61         omap_set_gpio_dataout(LCD_PANEL_BACKLIGHT_GPIO, 1);
  62
  63         if(0!= t2_out(PM_RECEIVER, ENABLE_VAUX2_DEDICATED,
  64                       TWL4030_VAUX2_DEDICATED)) return -EIO;
  65         if(0!= t2_out(PM_RECEIVER, ENABLE_VAUX2_DEV_GRP,
  66                       TWL4030_VAUX2_DEV_GRP)) return -EIO;
  67
  68         return 0;
  69 }
  70
  71 static void sdp2430_panel_disable(struct lcd_panel *panel)
  72 {
  73         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  74         omap_set_gpio_dataout(LCD_PANEL_BACKLIGHT_GPIO, 0);
  75 }
  76
  77 static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel)
  78 {
  79         return 0;
  80 }
  81
  82 struct lcd_panel sdp2430_panel = {
  83         .name           = "sdp2430",
  84         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
  85                           OMAP_LCDC_INV_HSYNC,
  86
  87         .bpp            = 16,
  88         .data_lines     = 16,
  89         .x_res          = 240,
  90         .y_res          = 320,
  91         .hsw            = 3,            /* hsync_len (4) - 1 */
  92         .hfp            = 3,            /* right_margin (4) - 1 */
  93         .hbp            = 39,           /* left_margin (40) - 1 */
  94         .vsw            = 1,            /* vsync_len (2) - 1 */
  95         .vfp            = 2,            /* lower_margin */
  96         .vbp            = 7,            /* upper_margin (8) - 1 */
  97
  98         .pixel_clock    = LCD_PIXCLOCK_MAX,
  99
 100         .init           = sdp2430_panel_init,
 101         .cleanup        = sdp2430_panel_cleanup,
 102         .enable = sdp2430_panel_enable,
 103         .disable        = sdp2430_panel_disable,
 104         .get_caps       = sdp2430_panel_get_caps,
 105 };
 106
 107 static int sdp2430_panel_probe(struct platform_device *pdev)
 108 {
 109         omapfb_register_panel(&sdp2430_panel);
 110         return 0;
 111 }
 112
 113 static int sdp2430_panel_remove(struct platform_device *pdev)
 114 {
 115         return 0;
 116 }
 117
 118 static int sdp2430_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
 119 {
 120         return 0;
 121 }
 122
 123 static int sdp2430_panel_resume(struct platform_device *pdev)
 124 {
 125         return 0;
 126 }
 127
 128 struct platform_driver sdp2430_panel_driver = {
 129         .probe          = sdp2430_panel_probe,
 130         .remove         = sdp2430_panel_remove,
 131         .suspend                = sdp2430_panel_suspend,
 132         .resume         = sdp2430_panel_resume,
 133         .driver         = {
 134                 .name   = "sdp2430_lcd",
 135                 .owner  = THIS_MODULE,
 136         },
 137 };
 138
 139 static int __init sdp2430_panel_drv_init(void)
 140 {
 141         return platform_driver_register(&sdp2430_panel_driver);
 142 }
 143
 144 static void __exit sdp2430_panel_drv_exit(void)
 145 {
 146         platform_driver_unregister(&sdp2430_panel_driver);
 147 }
 148
 149 module_init(sdp2430_panel_drv_init);
 150 module_exit(sdp2430_panel_drv_exit);