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/twl.h> 29 30#include <plat/mux.h> 31#include <asm/mach-types.h> 32 33#include "omapfb.h" 34 35#define SDP2430_LCD_PANEL_BACKLIGHT_GPIO 91 36#define SDP2430_LCD_PANEL_ENABLE_GPIO 154 37#define SDP3430_LCD_PANEL_BACKLIGHT_GPIO 24 38#define SDP3430_LCD_PANEL_ENABLE_GPIO 28 39 40static unsigned backlight_gpio; 41static unsigned enable_gpio; 42 43#define LCD_PIXCLOCK_MAX 5400 /* freq 5.4 MHz */ 44#define PM_RECEIVER TWL4030_MODULE_PM_RECEIVER 45#define ENABLE_VAUX2_DEDICATED 0x09 46#define ENABLE_VAUX2_DEV_GRP 0x20 47#define ENABLE_VAUX3_DEDICATED 0x03 48#define ENABLE_VAUX3_DEV_GRP 0x20 49 50#define ENABLE_VPLL2_DEDICATED 0x05 51#define ENABLE_VPLL2_DEV_GRP 0xE0 52#define TWL4030_VPLL2_DEV_GRP 0x33 53#define TWL4030_VPLL2_DEDICATED 0x36 54 55#define t2_out(c, r, v) twl_i2c_write_u8(c, r, v) 56 57 58static int sdp2430_panel_init(struct lcd_panel *panel, 59 struct omapfb_device *fbdev) 60{ 61 if (machine_is_omap_3430sdp()) { 62 enable_gpio = SDP3430_LCD_PANEL_ENABLE_GPIO; 63 backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO; 64 } else { 65 enable_gpio = SDP2430_LCD_PANEL_ENABLE_GPIO; 66 backlight_gpio = SDP2430_LCD_PANEL_BACKLIGHT_GPIO; 67 } 68 69 gpio_request(enable_gpio, "LCD enable"); /* LCD panel */ 70 gpio_request(backlight_gpio, "LCD bl"); /* LCD backlight */ 71 gpio_direction_output(enable_gpio, 0); 72 gpio_direction_output(backlight_gpio, 0); 73 74 return 0; 75} 76 77static void sdp2430_panel_cleanup(struct lcd_panel *panel) 78{ 79 gpio_free(backlight_gpio); 80 gpio_free(enable_gpio); 81} 82 83static int sdp2430_panel_enable(struct lcd_panel *panel) 84{ 85 u8 ded_val, ded_reg; 86 u8 grp_val, grp_reg; 87 88 if (machine_is_omap_3430sdp()) { 89 ded_reg = TWL4030_VAUX3_DEDICATED; 90 ded_val = ENABLE_VAUX3_DEDICATED; 91 grp_reg = TWL4030_VAUX3_DEV_GRP; 92 grp_val = ENABLE_VAUX3_DEV_GRP; 93 94 if (omap_rev() > OMAP3430_REV_ES1_0) { 95 t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED, 96 TWL4030_VPLL2_DEDICATED); 97 t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP, 98 TWL4030_VPLL2_DEV_GRP); 99 } 100 } else { 101 ded_reg = TWL4030_VAUX2_DEDICATED; 102 ded_val = ENABLE_VAUX2_DEDICATED; 103 grp_reg = TWL4030_VAUX2_DEV_GRP; 104 grp_val = ENABLE_VAUX2_DEV_GRP; 105 } 106 107 gpio_set_value(enable_gpio, 1); 108 gpio_set_value(backlight_gpio, 1); 109 110 if (0 != t2_out(PM_RECEIVER, ded_val, ded_reg)) 111 return -EIO; 112 if (0 != t2_out(PM_RECEIVER, grp_val, grp_reg)) 113 return -EIO; 114 115 return 0; 116} 117 118static void sdp2430_panel_disable(struct lcd_panel *panel) 119{ 120 gpio_set_value(enable_gpio, 0); 121 gpio_set_value(backlight_gpio, 0); 122 if (omap_rev() > OMAP3430_REV_ES1_0) { 123 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED); 124 t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP); 125 msleep(4); 126 } 127} 128 129static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel) 130{ 131 return 0; 132} 133 134struct lcd_panel sdp2430_panel = { 135 .name = "sdp2430", 136 .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | 137 OMAP_LCDC_INV_HSYNC, 138 139 .bpp = 16, 140 .data_lines = 16, 141 .x_res = 240, 142 .y_res = 320, 143 .hsw = 3, /* hsync_len (4) - 1 */ 144 .hfp = 3, /* right_margin (4) - 1 */ 145 .hbp = 39, /* left_margin (40) - 1 */ 146 .vsw = 1, /* vsync_len (2) - 1 */ 147 .vfp = 2, /* lower_margin */ 148 .vbp = 7, /* upper_margin (8) - 1 */ 149 150 .pixel_clock = LCD_PIXCLOCK_MAX, 151 152 .init = sdp2430_panel_init, 153 .cleanup = sdp2430_panel_cleanup, 154 .enable = sdp2430_panel_enable, 155 .disable = sdp2430_panel_disable, 156 .get_caps = sdp2430_panel_get_caps, 157}; 158 159static int sdp2430_panel_probe(struct platform_device *pdev) 160{ 161 omapfb_register_panel(&sdp2430_panel); 162 return 0; 163} 164 165static int sdp2430_panel_remove(struct platform_device *pdev) 166{ 167 return 0; 168} 169 170static int sdp2430_panel_suspend(struct platform_device *pdev, 171 pm_message_t mesg) 172{ 173 return 0; 174} 175 176static int sdp2430_panel_resume(struct platform_device *pdev) 177{ 178 return 0; 179} 180 181struct platform_driver sdp2430_panel_driver = { 182 .probe = sdp2430_panel_probe, 183 .remove = sdp2430_panel_remove, 184 .suspend = sdp2430_panel_suspend, 185 .resume = sdp2430_panel_resume, 186 .driver = { 187 .name = "sdp2430_lcd", 188 .owner = THIS_MODULE, 189 }, 190}; 191 192static int __init sdp2430_panel_drv_init(void) 193{ 194 return platform_driver_register(&sdp2430_panel_driver); 195} 196 197static void __exit sdp2430_panel_drv_exit(void) 198{ 199 platform_driver_unregister(&sdp2430_panel_driver); 200} 201 202module_init(sdp2430_panel_drv_init); 203module_exit(sdp2430_panel_drv_exit); 204