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_PIXCLOCK_MAX                5400 /* freq 5.4 MHz */
  43 #define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
  44 #define ENABLE_VAUX2_DEDICATED  0x09
  45 #define ENABLE_VAUX2_DEV_GRP    0x20
  46 #define ENABLE_VAUX3_DEDICATED  0x03
  47 #define ENABLE_VAUX3_DEV_GRP    0x20
  48
  49 #define ENABLE_VPLL2_DEDICATED          0x05
  50 #define ENABLE_VPLL2_DEV_GRP            0xE0
  51 #define TWL4030_VPLL2_DEV_GRP           0x33
  52 #define TWL4030_VPLL2_DEDICATED         0x36
  53
  54 #define t2_out(c, r, v) twl4030_i2c_write_u8(c, r, v)
  55
  56
  57 static int sdp2430_panel_init(struct lcd_panel *panel,
  58                                 struct omapfb_device *fbdev)
  59 {
  60         if (machine_is_omap_3430sdp()) {
  61                 enable_gpio    = SDP3430_LCD_PANEL_ENABLE_GPIO;
  62                 backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO;
  63         } else {
  64                 enable_gpio    = SDP2430_LCD_PANEL_ENABLE_GPIO;
  65                 backlight_gpio = SDP2430_LCD_PANEL_BACKLIGHT_GPIO;
  66         }
  67
  68         gpio_request(enable_gpio, "LCD enable");        /* LCD panel */
  69         gpio_request(backlight_gpio, "LCD bl");         /* LCD backlight */
  70         gpio_direction_output(enable_gpio, 0);
  71         gpio_direction_output(backlight_gpio, 0);
  72
  73         return 0;
  74 }
  75
  76 static void sdp2430_panel_cleanup(struct lcd_panel *panel)
  77 {
  78         gpio_free(backlight_gpio);
  79         gpio_free(enable_gpio);
  80 }
  81
  82 static int sdp2430_panel_enable(struct lcd_panel *panel)
  83 {
  84         u8 ded_val, ded_reg;
  85         u8 grp_val, grp_reg;
  86
  87         if (machine_is_omap_3430sdp()) {
  88                 ded_reg = TWL4030_VAUX3_DEDICATED;
  89                 ded_val = ENABLE_VAUX3_DEDICATED;
  90                 grp_reg = TWL4030_VAUX3_DEV_GRP;
  91                 grp_val = ENABLE_VAUX3_DEV_GRP;
  92
  93                 if (omap_rev() > OMAP3430_REV_ES1_0) {
  94                         t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
  95                                         TWL4030_VPLL2_DEDICATED);
  96                         t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
  97                                         TWL4030_VPLL2_DEV_GRP);
  98                 }
  99         } else {
 100                 ded_reg = TWL4030_VAUX2_DEDICATED;
 101                 ded_val = ENABLE_VAUX2_DEDICATED;
 102                 grp_reg = TWL4030_VAUX2_DEV_GRP;
 103                 grp_val = ENABLE_VAUX2_DEV_GRP;
 104         }
 105
 106         gpio_set_value(enable_gpio, 1);
 107         gpio_set_value(backlight_gpio, 1);
 108
 109         if (0 != t2_out(PM_RECEIVER, ded_val, ded_reg))
 110                 return -EIO;
 111         if (0 != t2_out(PM_RECEIVER, grp_val, grp_reg))
 112                 return -EIO;
 113
 114         return 0;
 115 }
 116
 117 static void sdp2430_panel_disable(struct lcd_panel *panel)
 118 {
 119         gpio_set_value(enable_gpio, 0);
 120         gpio_set_value(backlight_gpio, 0);
 121         if (omap_rev() > OMAP3430_REV_ES1_0) {
 122                 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
 123                 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
 124                 msleep(4);
 125         }
 126 }
 127
 128 static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel)
 129 {
 130         return 0;
 131 }
 132
 133 struct lcd_panel sdp2430_panel = {
 134         .name           = "sdp2430",
 135         .config         = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
 136                           OMAP_LCDC_INV_HSYNC,
 137
 138         .bpp            = 16,
 139         .data_lines     = 16,
 140         .x_res          = 240,
 141         .y_res          = 320,
 142         .hsw            = 3,            /* hsync_len (4) - 1 */
 143         .hfp            = 3,            /* right_margin (4) - 1 */
 144         .hbp            = 39,           /* left_margin (40) - 1 */
 145         .vsw            = 1,            /* vsync_len (2) - 1 */
 146         .vfp            = 2,            /* lower_margin */
 147         .vbp            = 7,            /* upper_margin (8) - 1 */
 148
 149         .pixel_clock    = LCD_PIXCLOCK_MAX,
 150
 151         .init           = sdp2430_panel_init,
 152         .cleanup        = sdp2430_panel_cleanup,
 153         .enable         = sdp2430_panel_enable,
 154         .disable        = sdp2430_panel_disable,
 155         .get_caps       = sdp2430_panel_get_caps,
 156 };
 157
 158 static int sdp2430_panel_probe(struct platform_device *pdev)
 159 {
 160         omapfb_register_panel(&sdp2430_panel);
 161         return 0;
 162 }
 163
 164 static int sdp2430_panel_remove(struct platform_device *pdev)
 165 {
 166         return 0;
 167 }
 168
 169 static int sdp2430_panel_suspend(struct platform_device *pdev,
 170                                         pm_message_t mesg)
 171 {
 172         return 0;
 173 }
 174
 175 static int sdp2430_panel_resume(struct platform_device *pdev)
 176 {
 177         return 0;
 178 }
 179
 180 struct platform_driver sdp2430_panel_driver = {
 181         .probe          = sdp2430_panel_probe,
 182         .remove         = sdp2430_panel_remove,
 183         .suspend        = sdp2430_panel_suspend,
 184         .resume         = sdp2430_panel_resume,
 185         .driver         = {
 186                 .name   = "sdp2430_lcd",
 187                 .owner  = THIS_MODULE,
 188         },
 189 };
 190
 191 static int __init sdp2430_panel_drv_init(void)
 192 {
 193         return platform_driver_register(&sdp2430_panel_driver);
 194 }
 195
 196 static void __exit sdp2430_panel_drv_exit(void)
 197 {
 198         platform_driver_unregister(&sdp2430_panel_driver);
 199 }
 200
 201 module_init(sdp2430_panel_drv_init);
 202 module_exit(sdp2430_panel_drv_exit);