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/delay.h>
  27 #include <linux/gpio.h>
  28 #include <linux/i2c/twl4030.h>
  29
  30 #include <mach/mux.h>
  31 #include <mach/omapfb.h>
  32 #include <asm/mach-types.h>
  33
  34 #define SDP2430_LCD_PANEL_BACKLIGHT_GPIO        91
  35 #define SDP2430_LCD_PANEL_ENABLE_GPIO           154
  36 #define SDP3430_LCD_PANEL_BACKLIGHT_GPIO        24
  37 #define SDP3430_LCD_PANEL_ENABLE_GPIO           28
  38
  39 static unsigned backlight_gpio;
  40 static unsigned enable_gpio;
  41
  42 #define LCD_PANEL_BACKLIGHT_GPIO        91
  43 #define LCD_PANEL_ENABLE_GPIO           154
  44 #define LCD_PIXCLOCK_MAX                5400 /* freq 5.4 MHz */
  45 #define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
  46 #define ENABLE_VAUX2_DEDICATED  0x09
  47 #define ENABLE_VAUX2_DEV_GRP    0x20
  48
  49
  50 #define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
  51
  52
  53 static int sdp2430_panel_init(struct lcd_panel *panel,
  54                                 struct omapfb_device *fbdev)
  55 {
  56         if (machine_is_omap_3430sdp()) {
  57                 enable_gpio    = SDP3430_LCD_PANEL_ENABLE_GPIO;
  58                 backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO;
  59         } else {
  60                 enable_gpio    = SDP2430_LCD_PANEL_ENABLE_GPIO;
  61                 backlight_gpio = SDP2430_LCD_PANEL_BACKLIGHT_GPIO;
  62         }
  63
  64         gpio_request(enable_gpio, "LCD enable");        /* LCD panel */
  65         gpio_request(backlight_gpio, "LCD bl");         /* LCD backlight */
  66         gpio_direction_output(enable_gpio, 0);
  67         gpio_direction_output(backlight_gpio, 0);
  68
  69         return 0;
  70 }
  71
  72 static void sdp2430_panel_cleanup(struct lcd_panel *panel)
  73 {
  74         gpio_free(backlight_gpio);
  75         gpio_free(enable_gpio);
  76 }
  77
  78 static int sdp2430_panel_enable(struct lcd_panel *panel)
  79 {
  80         u8 ded_val, ded_reg;
  81         u8 grp_val, grp_reg;
  82
  83         if (machine_is_omap_3430sdp()) {
  84                 ded_reg = TWL4030_VAUX3_DEDICATED;
  85                 ded_val = ENABLE_VAUX3_DEDICATED;
  86                 grp_reg = TWL4030_VAUX3_DEV_GRP;
  87                 grp_val = ENABLE_VAUX3_DEV_GRP;
  88
  89                 if (omap_rev() > OMAP3430_REV_ES1_0) {
  90                         t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
  91                                         TWL4030_VPLL2_DEDICATED);
  92                         t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
  93                                         TWL4030_VPLL2_DEV_GRP);
  94                 }
  95         } else {
  96                 ded_reg = TWL4030_VAUX2_DEDICATED;
  97                 ded_val = ENABLE_VAUX2_DEDICATED;
  98                 grp_reg = TWL4030_VAUX2_DEV_GRP;
  99                 grp_val = ENABLE_VAUX2_DEV_GRP;
 100         }
 101
 102         gpio_set_value(enable_gpio, 1);
 103         gpio_set_value(backlight_gpio, 1);
 104
 105         if (0 != t2_out(PM_RECEIVER, ded_val, ded_reg))
 106                 return -EIO;
 107         if (0 != t2_out(PM_RECEIVER, grp_val, grp_reg))
 108                 return -EIO;
 109
 110         return 0;
 111 }
 112
 113 static void sdp2430_panel_disable(struct lcd_panel *panel)
 114 {
 115         gpio_set_value(enable_gpio, 0);
 116         gpio_set_value(backlight_gpio, 0);
 117         if (omap_rev() > OMAP3430_REV_ES1_0) {
 118                 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
 119                 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
 120                 msleep(4);
 121         }
 122 }
 123
 124 static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel)
 125 {
 126         return 0;
 127 }
 128
 129 struct lcd_panel sdp2430_panel = {
 130         .name           = "sdp2430",
 131         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 132                           OMAP_LCDC_INV_HSYNC,
 133
 134         .bpp            = 16,
 135         .data_lines     = 16,
 136         .x_res          = 240,
 137         .y_res          = 320,
 138         .hsw            = 3,            /* hsync_len (4) - 1 */
 139         .hfp            = 3,            /* right_margin (4) - 1 */
 140         .hbp            = 39,           /* left_margin (40) - 1 */
 141         .vsw            = 1,            /* vsync_len (2) - 1 */
 142         .vfp            = 2,            /* lower_margin */
 143         .vbp            = 7,            /* upper_margin (8) - 1 */
 144
 145         .pixel_clock    = LCD_PIXCLOCK_MAX,
 146
 147         .init           = sdp2430_panel_init,
 148         .cleanup        = sdp2430_panel_cleanup,
 149         .enable = sdp2430_panel_enable,
 150         .disable        = sdp2430_panel_disable,
 151         .get_caps       = sdp2430_panel_get_caps,
 152 };
 153
 154 static int sdp2430_panel_probe(struct platform_device *pdev)
 155 {
 156         omapfb_register_panel(&sdp2430_panel);
 157         return 0;
 158 }
 159
 160 static int sdp2430_panel_remove(struct platform_device *pdev)
 161 {
 162         return 0;
 163 }
 164
 165 static int sdp2430_panel_suspend(struct platform_device *pdev,
 166                                         pm_message_t mesg)
 167 {
 168         return 0;
 169 }
 170
 171 static int sdp2430_panel_resume(struct platform_device *pdev)
 172 {
 173         return 0;
 174 }
 175
 176 struct platform_driver sdp2430_panel_driver = {
 177         .probe          = sdp2430_panel_probe,
 178         .remove         = sdp2430_panel_remove,
 179         .suspend                = sdp2430_panel_suspend,
 180         .resume         = sdp2430_panel_resume,
 181         .driver         = {
 182                 .name   = "sdp2430_lcd",
 183                 .owner  = THIS_MODULE,
 184         },
 185 };
 186
 187 static int __init sdp2430_panel_drv_init(void)
 188 {
 189         return platform_driver_register(&sdp2430_panel_driver);
 190 }
 191
 192 static void __exit sdp2430_panel_drv_exit(void)
 193 {
 194         platform_driver_unregister(&sdp2430_panel_driver);
 195 }
 196
 197 module_init(sdp2430_panel_drv_init);
 198 module_exit(sdp2430_panel_drv_exit);