Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | /* * Based on drivers/video/omap/lcd_inn1510.c * * LCD panel support for the Amstrad E3 (Delta) videophone. * * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/delay.h> #include <linux/lcd.h> #include <linux/gpio.h> #include <mach/hardware.h> #include <mach/board-ams-delta.h> #include "omapfb.h" #define AMS_DELTA_DEFAULT_CONTRAST 112 #define AMS_DELTA_MAX_CONTRAST 0x00FF #define AMS_DELTA_LCD_POWER 0x0100 /* LCD class device section */ static int ams_delta_lcd; static int ams_delta_lcd_set_power(struct lcd_device *dev, int power) { if (power == FB_BLANK_UNBLANK) { if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) { omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST, OMAP_PWL_ENABLE); omap_writeb(1, OMAP_PWL_CLK_ENABLE); ams_delta_lcd |= AMS_DELTA_LCD_POWER; } } else { if (ams_delta_lcd & AMS_DELTA_LCD_POWER) { omap_writeb(0, OMAP_PWL_ENABLE); omap_writeb(0, OMAP_PWL_CLK_ENABLE); ams_delta_lcd &= ~AMS_DELTA_LCD_POWER; } } return 0; } static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value) { if ((value >= 0) && (value <= AMS_DELTA_MAX_CONTRAST)) { omap_writeb(value, OMAP_PWL_ENABLE); ams_delta_lcd &= ~AMS_DELTA_MAX_CONTRAST; ams_delta_lcd |= value; } return 0; } #ifdef CONFIG_LCD_CLASS_DEVICE static int ams_delta_lcd_get_power(struct lcd_device *dev) { if (ams_delta_lcd & AMS_DELTA_LCD_POWER) return FB_BLANK_UNBLANK; else return FB_BLANK_POWERDOWN; } static int ams_delta_lcd_get_contrast(struct lcd_device *dev) { if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) return 0; return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST; } static struct lcd_ops ams_delta_lcd_ops = { .get_power = ams_delta_lcd_get_power, .set_power = ams_delta_lcd_set_power, .get_contrast = ams_delta_lcd_get_contrast, .set_contrast = ams_delta_lcd_set_contrast, }; #endif /* omapfb panel section */ static const struct gpio _gpios[] = { { .gpio = AMS_DELTA_GPIO_PIN_LCD_VBLEN, .flags = GPIOF_OUT_INIT_LOW, .label = "lcd_vblen", }, { .gpio = AMS_DELTA_GPIO_PIN_LCD_NDISP, .flags = GPIOF_OUT_INIT_LOW, .label = "lcd_ndisp", }, }; static int ams_delta_panel_init(struct lcd_panel *panel, struct omapfb_device *fbdev) { return gpio_request_array(_gpios, ARRAY_SIZE(_gpios)); } static void ams_delta_panel_cleanup(struct lcd_panel *panel) { gpio_free_array(_gpios, ARRAY_SIZE(_gpios)); } static int ams_delta_panel_enable(struct lcd_panel *panel) { gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 1); gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 1); return 0; } static void ams_delta_panel_disable(struct lcd_panel *panel) { gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 0); gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 0); } static struct lcd_panel ams_delta_panel = { .name = "ams-delta", .config = 0, .bpp = 12, .data_lines = 16, .x_res = 480, .y_res = 320, .pixel_clock = 4687, .hsw = 3, .hfp = 1, .hbp = 1, .vsw = 1, .vfp = 0, .vbp = 0, .pcd = 0, .acb = 37, .init = ams_delta_panel_init, .cleanup = ams_delta_panel_cleanup, .enable = ams_delta_panel_enable, .disable = ams_delta_panel_disable, }; /* platform driver section */ static int ams_delta_panel_probe(struct platform_device *pdev) { struct lcd_device *lcd_device = NULL; #ifdef CONFIG_LCD_CLASS_DEVICE int ret; lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL, &ams_delta_lcd_ops); if (IS_ERR(lcd_device)) { ret = PTR_ERR(lcd_device); dev_err(&pdev->dev, "failed to register device\n"); return ret; } platform_set_drvdata(pdev, lcd_device); lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST; #endif ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST); ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); omapfb_register_panel(&ams_delta_panel); return 0; } static struct platform_driver ams_delta_panel_driver = { .probe = ams_delta_panel_probe, .driver = { .name = "lcd_ams_delta", }, }; module_platform_driver(ams_delta_panel_driver); MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>"); MODULE_DESCRIPTION("LCD panel support for the Amstrad E3 (Delta) videophone"); MODULE_LICENSE("GPL"); |