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 H4_LCD_PIXCLOCK_MAX             185186 /* freq 5.4 MHz */
  35 #define PM_RECEIVER             TWL4030_MODULE_PM_RECIEVER
  36 #define ENABLE_VAUX2_DEDICATED  0x09
  37 #define ENABLE_VAUX2_DEV_GRP    0x20
  38 #define TWL4030_VAUX2_DEV_GRP           0x1B
  39 #define TWL4030_VAUX2_DEDICATED         0x1E
  40 #define TWL4030_MODULE_PM_RECIEVER  0x13
  41
  42
  43
  44 #define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
  45
  46
  47 static int sdp2430_panel_init(struct lcd_panel *panel,
  48                                 struct omapfb_device *fbdev)
  49 {
  50         omap_request_gpio(LCD_PANEL_ENABLE_GPIO);       /* LCD panel */
  51         omap_request_gpio(LCD_PANEL_BACKLIGHT_GPIO);    /* LCD backlight */
  52         omap_set_gpio_direction(LCD_PANEL_ENABLE_GPIO, 0);      /* output */
  53         omap_set_gpio_direction(LCD_PANEL_BACKLIGHT_GPIO, 0);   /* output */
  54
  55         return 0;
  56 }
  57
  58 static void sdp2430_panel_cleanup(struct lcd_panel *panel)
  59 {
  60 }
  61
  62 static int sdp2430_panel_enable(struct lcd_panel *panel)
  63 {
  64         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 1);
  65         omap_set_gpio_dataout(LCD_PANEL_BACKLIGHT_GPIO, 1);
  66
  67         if(0!= t2_out(PM_RECEIVER, ENABLE_VAUX2_DEDICATED,
  68                       TWL4030_VAUX2_DEDICATED)) return -EIO;
  69         if(0!= t2_out(PM_RECEIVER, ENABLE_VAUX2_DEV_GRP,
  70                       TWL4030_VAUX2_DEV_GRP)) return -EIO;
  71
  72         return 0;
  73 }
  74
  75 static void sdp2430_panel_disable(struct lcd_panel *panel)
  76 {
  77         omap_set_gpio_dataout(LCD_PANEL_ENABLE_GPIO, 0);
  78         omap_set_gpio_dataout(LCD_PANEL_BACKLIGHT_GPIO, 0);
  79 }
  80
  81 static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel)
  82 {
  83         return 0;
  84 }
  85
  86 struct lcd_panel sdp2430_panel = {
  87         .name           = "sdp2430",
  88         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
  89                           OMAP_LCDC_INV_HSYNC,
  90
  91         .bpp            = 16,
  92         .data_lines     = 16,
  93         .x_res          = 240,
  94         .y_res          = 320,
  95         .hsw            = 3,            /* hsync_len (4) - 1 */
  96         .hfp            = 3,            /* right_margin (4) - 1 */
  97         .hbp            = 39,           /* left_margin (40) - 1 */
  98         .vsw            = 1,            /* vsync_len (2) - 1 */
  99         .vfp            = 2,            /* lower_margin */
 100         .vbp            = 7,            /* upper_margin (8) - 1 */
 101
 102         .pixel_clock    = H4_LCD_PIXCLOCK_MAX,
 103
 104         .init           = sdp2430_panel_init,
 105         .cleanup        = sdp2430_panel_cleanup,
 106         .enable = sdp2430_panel_enable,
 107         .disable        = sdp2430_panel_disable,
 108         .get_caps       = sdp2430_panel_get_caps,
 109 };
 110
 111 static int sdp2430_panel_probe(struct platform_device *pdev)
 112 {
 113         omapfb_register_panel(&sdp2430_panel);
 114         return 0;
 115 }
 116
 117 static int sdp2430_panel_remove(struct platform_device *pdev)
 118 {
 119         return 0;
 120 }
 121
 122 static int sdp2430_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
 123 {
 124         return 0;
 125 }
 126
 127 static int sdp2430_panel_resume(struct platform_device *pdev)
 128 {
 129         return 0;
 130 }
 131
 132 struct platform_driver sdp2430_panel_driver = {
 133         .probe          = sdp2430_panel_probe,
 134         .remove         = sdp2430_panel_remove,
 135         .suspend                = sdp2430_panel_suspend,
 136         .resume         = sdp2430_panel_resume,
 137         .driver         = {
 138                 .name   = "sdp2430_lcd",
 139                 .owner  = THIS_MODULE,
 140         },
 141 };
 142
 143 static int __init sdp2430_panel_drv_init(void)
 144 {
 145         return platform_driver_register(&sdp2430_panel_driver);
 146 }
 147
 148 static void __exit sdp2430_panel_drv_exit(void)
 149 {
 150         platform_driver_unregister(&sdp2430_panel_driver);
 151 }
 152
 153 module_init(sdp2430_panel_drv_init);
 154 module_exit(sdp2430_panel_drv_exit);