drivers/video/omap/lcd_3430sdp.c

   1 /*
   2  * LCD panel support for the TI 3430SDP board
   3  *
   4  * Copyright (C) 2008 Texas Instruments
   5  * Author: Iqbal Shareef <iqbal@ti.com>
   6  *
   7  * Derived from drivers/video/omap/lcd_2430sdp.c
   8  * Copyright (C) 2007 MontaVista
   9  * Author: Hunyue Yau <hyau@mvista.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the
  13  * Free Software Foundation; either version 2 of the License, or (at your
  14  * option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/i2c/twl4030.h>
  29
  30 #include <asm/arch/gpio.h>
  31 #include <asm/arch/omapfb.h>
  32
  33 #define SDP3430_LCD_PANEL_BACKLIGHT_GPIO        8
  34 #define SDP3430_LCD_PANEL_ENABLE_GPIO           5
  35
  36 static unsigned backlight_gpio;
  37 static unsigned enable_gpio;
  38
  39 #define LCD_PIXCLOCK_MAX                        167000
  40 #define ENABLE_VAUX2_DEDICATED                  0x03
  41 #define ENABLE_VAUX2_DEV_GRP                    0x20
  42 #define ENABLE_VAUX3_DEDICATED                  0x05
  43 #define ENABLE_VAUX3_DEV_GRP                    0xE0
  44
  45 static int sdp3430_panel_init(struct lcd_panel *panel,
  46                                 struct omapfb_device *fbdev)
  47 {
  48         enable_gpio    = SDP3430_LCD_PANEL_ENABLE_GPIO;
  49         backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO;
  50
  51         omap_request_gpio(enable_gpio);                 /* LCD panel */
  52         omap_request_gpio(backlight_gpio);              /* LCD backlight */
  53         omap_set_gpio_direction(enable_gpio, 0);        /* output */
  54         omap_set_gpio_direction(backlight_gpio, 0);     /* output */
  55
  56         return 0;
  57 }
  58
  59 static void sdp3430_panel_cleanup(struct lcd_panel *panel)
  60 {
  61         omap_free_gpio(backlight_gpio);
  62         omap_free_gpio(enable_gpio);
  63 }
  64
  65 static int sdp3430_panel_enable(struct lcd_panel *panel)
  66 {
  67         omap_set_gpio_dataout(enable_gpio, 1);
  68         omap_set_gpio_dataout(backlight_gpio, 1);
  69
  70         if (0 != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, ENABLE_VAUX3_DEDICATED,
  71                                         TWL4030_VAUX3_DEDICATED))
  72                 return -EIO;
  73         if (0 != twl4030_i2c_write_u8(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP,
  74                                         TWL4030_VAUX3_DEV_GRP))
  75                 return -EIO;
  76
  77         return 0;
  78 }
  79
  80 static void sdp3430_panel_disable(struct lcd_panel *panel)
  81 {
  82         omap_set_gpio_dataout(enable_gpio, 0);
  83         omap_set_gpio_dataout(backlight_gpio, 0);
  84 }
  85
  86 static unsigned long sdp3430_panel_get_caps(struct lcd_panel *panel)
  87 {
  88         return 0;
  89 }
  90
  91 struct lcd_panel sdp3430_panel = {
  92         .name           = "sdp3430",
  93         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
  94                           OMAP_LCDC_INV_HSYNC,
  95
  96         .bpp            = 16,
  97         .data_lines     = 16,
  98         .x_res          = 240,
  99         .y_res          = 320,
 100         .hsw            = 3,            /* hsync_len (4) - 1 */
 101         .hfp            = 3,            /* right_margin (4) - 1 */
 102         .hbp            = 39,           /* left_margin (40) - 1 */
 103         .vsw            = 1,            /* vsync_len (2) - 1 */
 104         .vfp            = 2,            /* lower_margin */
 105         .vbp            = 7,            /* upper_margin (8) - 1 */
 106
 107         .pixel_clock    = LCD_PIXCLOCK_MAX,
 108
 109         .init           = sdp3430_panel_init,
 110         .cleanup        = sdp3430_panel_cleanup,
 111         .enable         = sdp3430_panel_enable,
 112         .disable        = sdp3430_panel_disable,
 113         .get_caps       = sdp3430_panel_get_caps,
 114 };
 115
 116 static int sdp3430_panel_probe(struct platform_device *pdev)
 117 {
 118         omapfb_register_panel(&sdp3430_panel);
 119         return 0;
 120 }
 121
 122 static int sdp3430_panel_remove(struct platform_device *pdev)
 123 {
 124         return 0;
 125 }
 126
 127 static int sdp3430_panel_suspend(struct platform_device *pdev,
 128                                         pm_message_t mesg)
 129 {
 130         return 0;
 131 }
 132
 133 static int sdp3430_panel_resume(struct platform_device *pdev)
 134 {
 135         return 0;
 136 }
 137
 138 struct platform_driver sdp3430_panel_driver = {
 139         .probe          = sdp3430_panel_probe,
 140         .remove         = sdp3430_panel_remove,
 141         .suspend        = sdp3430_panel_suspend,
 142         .resume         = sdp3430_panel_resume,
 143         .driver         = {
 144                 .name           = "sdp3430_lcd",
 145                 .owner          = THIS_MODULE,
 146         },
 147 };
 148
 149 static int __init sdp3430_panel_drv_init(void)
 150 {
 151         return platform_driver_register(&sdp3430_panel_driver);
 152 }
 153
 154 static void __exit sdp3430_panel_drv_exit(void)
 155 {
 156         platform_driver_unregister(&sdp3430_panel_driver);
 157 }
 158
 159 module_init(sdp3430_panel_drv_init);
 160 module_exit(sdp3430_panel_drv_exit);
 161
 162 MODULE_ALIAS("platform:sdp3430_lcd");