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 #include <linux/i2c/twl4030.h>
  27
  28 #include <mach/gpio.h>
  29 #include <mach/mux.h>
  30 #include <mach/omapfb.h>
  31 #include <asm/mach-types.h>
  32
  33 #define SDP2430_LCD_PANEL_BACKLIGHT_GPIO        91
  34 #define SDP2430_LCD_PANEL_ENABLE_GPIO           154
  35 #define SDP3430_LCD_PANEL_BACKLIGHT_GPIO        24
  36 #define SDP3430_LCD_PANEL_ENABLE_GPIO           28
  37
  38 static unsigned backlight_gpio;
  39 static unsigned enable_gpio;
  40
  41 #define LCD_PIXCLOCK_MAX                5400 /* freq 5.4 MHz */
  42 #define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
  43 #define ENABLE_VAUX2_DEDICATED  0x09
  44 #define ENABLE_VAUX2_DEV_GRP    0x20
  45 #define ENABLE_VAUX3_DEDICATED  0x03
  46 #define ENABLE_VAUX3_DEV_GRP    0x20
  47
  48
  49 #define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
  50
  51
  52 static int sdp2430_panel_init(struct lcd_panel *panel,
  53                                 struct omapfb_device *fbdev)
  54 {
  55         if (machine_is_omap_3430sdp()) {
  56                 enable_gpio    = SDP3430_LCD_PANEL_ENABLE_GPIO;
  57                 backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO;
  58         } else {
  59                 enable_gpio    = SDP2430_LCD_PANEL_ENABLE_GPIO;
  60                 backlight_gpio = SDP2430_LCD_PANEL_BACKLIGHT_GPIO;
  61         }
  62
  63         omap_request_gpio(enable_gpio);                 /* LCD panel */
  64         omap_request_gpio(backlight_gpio);              /* LCD backlight */
  65         omap_set_gpio_direction(enable_gpio, 0);        /* output */
  66         omap_set_gpio_direction(backlight_gpio, 0);     /* output */
  67
  68         return 0;
  69 }
  70
  71 static void sdp2430_panel_cleanup(struct lcd_panel *panel)
  72 {
  73 }
  74
  75 static int sdp2430_panel_enable(struct lcd_panel *panel)
  76 {
  77         u8 ded_val, ded_reg;
  78         u8 grp_val, grp_reg;
  79
  80         if (machine_is_omap_3430sdp()) {
  81                 ded_reg = TWL4030_VAUX3_DEDICATED;
  82                 ded_val = ENABLE_VAUX3_DEDICATED;
  83                 grp_reg = TWL4030_VAUX3_DEV_GRP;
  84                 grp_val = ENABLE_VAUX3_DEV_GRP;
  85         } else {
  86                 ded_reg = TWL4030_VAUX2_DEDICATED;
  87                 ded_val = ENABLE_VAUX2_DEDICATED;
  88                 grp_reg = TWL4030_VAUX2_DEV_GRP;
  89                 grp_val = ENABLE_VAUX2_DEV_GRP;
  90         }
  91
  92         omap_set_gpio_dataout(enable_gpio, 1);
  93         omap_set_gpio_dataout(backlight_gpio, 1);
  94
  95         if (0 != t2_out(PM_RECEIVER, ded_val, ded_reg))
  96                 return -EIO;
  97         if (0 != t2_out(PM_RECEIVER, grp_val, grp_reg))
  98                 return -EIO;
  99
 100         return 0;
 101 }
 102
 103 static void sdp2430_panel_disable(struct lcd_panel *panel)
 104 {
 105         omap_set_gpio_dataout(enable_gpio, 0);
 106         omap_set_gpio_dataout(backlight_gpio, 0);
 107 }
 108
 109 static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel)
 110 {
 111         return 0;
 112 }
 113
 114 struct lcd_panel sdp2430_panel = {
 115         .name           = "sdp2430",
 116         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 117                           OMAP_LCDC_INV_HSYNC,
 118
 119         .bpp            = 16,
 120         .data_lines     = 16,
 121         .x_res          = 240,
 122         .y_res          = 320,
 123         .hsw            = 3,            /* hsync_len (4) - 1 */
 124         .hfp            = 3,            /* right_margin (4) - 1 */
 125         .hbp            = 39,           /* left_margin (40) - 1 */
 126         .vsw            = 1,            /* vsync_len (2) - 1 */
 127         .vfp            = 2,            /* lower_margin */
 128         .vbp            = 7,            /* upper_margin (8) - 1 */
 129
 130         .pixel_clock    = LCD_PIXCLOCK_MAX,
 131
 132         .init           = sdp2430_panel_init,
 133         .cleanup        = sdp2430_panel_cleanup,
 134         .enable         = sdp2430_panel_enable,
 135         .disable        = sdp2430_panel_disable,
 136         .get_caps       = sdp2430_panel_get_caps,
 137 };
 138
 139 static int sdp2430_panel_probe(struct platform_device *pdev)
 140 {
 141         omapfb_register_panel(&sdp2430_panel);
 142         return 0;
 143 }
 144
 145 static int sdp2430_panel_remove(struct platform_device *pdev)
 146 {
 147         return 0;
 148 }
 149
 150 static int sdp2430_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
 151 {
 152         return 0;
 153 }
 154
 155 static int sdp2430_panel_resume(struct platform_device *pdev)
 156 {
 157         return 0;
 158 }
 159
 160 struct platform_driver sdp2430_panel_driver = {
 161         .probe          = sdp2430_panel_probe,
 162         .remove         = sdp2430_panel_remove,
 163         .suspend        = sdp2430_panel_suspend,
 164         .resume         = sdp2430_panel_resume,
 165         .driver         = {
 166                 .name   = "sdp2430_lcd",
 167                 .owner  = THIS_MODULE,
 168         },
 169 };
 170
 171 static int __init sdp2430_panel_drv_init(void)
 172 {
 173         return platform_driver_register(&sdp2430_panel_driver);
 174 }
 175
 176 static void __exit sdp2430_panel_drv_exit(void)
 177 {
 178         platform_driver_unregister(&sdp2430_panel_driver);
 179 }
 180
 181 module_init(sdp2430_panel_drv_init);
 182 module_exit(sdp2430_panel_drv_exit);