/* * LCD panel support for the TI 2430SDP board * * Copyright (C) 2007 MontaVista * Author: Hunyue Yau <hyau@mvista.com> * * Derived from drivers/video/omap/lcd-apollon.c * * 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/delay.h> #include <linux/gpio.h> #include <linux/i2c/twl.h> #include <plat/mux.h> #include <asm/mach-types.h> #include "omapfb.h" #define SDP2430_LCD_PANEL_BACKLIGHT_GPIO 91 #define SDP2430_LCD_PANEL_ENABLE_GPIO 154 #define SDP3430_LCD_PANEL_BACKLIGHT_GPIO 24 #define SDP3430_LCD_PANEL_ENABLE_GPIO 28 static unsigned backlight_gpio; static unsigned enable_gpio; #define LCD_PIXCLOCK_MAX 5400 /* freq 5.4 MHz */ #define PM_RECEIVER TWL4030_MODULE_PM_RECEIVER #define ENABLE_VAUX2_DEDICATED 0x09 #define ENABLE_VAUX2_DEV_GRP 0x20 #define ENABLE_VAUX3_DEDICATED 0x03 #define ENABLE_VAUX3_DEV_GRP 0x20 #define ENABLE_VPLL2_DEDICATED 0x05 #define ENABLE_VPLL2_DEV_GRP 0xE0 #define TWL4030_VPLL2_DEV_GRP 0x33 #define TWL4030_VPLL2_DEDICATED 0x36 #define t2_out(c, r, v) twl_i2c_write_u8(c, r, v) static int sdp2430_panel_init(struct lcd_panel *panel, struct omapfb_device *fbdev) { if (machine_is_omap_3430sdp()) { enable_gpio = SDP3430_LCD_PANEL_ENABLE_GPIO; backlight_gpio = SDP3430_LCD_PANEL_BACKLIGHT_GPIO; } else { enable_gpio = SDP2430_LCD_PANEL_ENABLE_GPIO; backlight_gpio = SDP2430_LCD_PANEL_BACKLIGHT_GPIO; } gpio_request(enable_gpio, "LCD enable"); /* LCD panel */ gpio_request(backlight_gpio, "LCD bl"); /* LCD backlight */ gpio_direction_output(enable_gpio, 0); gpio_direction_output(backlight_gpio, 0); return 0; } static void sdp2430_panel_cleanup(struct lcd_panel *panel) { gpio_free(backlight_gpio); gpio_free(enable_gpio); } static int sdp2430_panel_enable(struct lcd_panel *panel) { u8 ded_val, ded_reg; u8 grp_val, grp_reg; if (machine_is_omap_3430sdp()) { ded_reg = TWL4030_VAUX3_DEDICATED; ded_val = ENABLE_VAUX3_DEDICATED; grp_reg = TWL4030_VAUX3_DEV_GRP; grp_val = ENABLE_VAUX3_DEV_GRP; if (omap_rev() > OMAP3430_REV_ES1_0) { t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED, TWL4030_VPLL2_DEDICATED); t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP, TWL4030_VPLL2_DEV_GRP); } } else { ded_reg = TWL4030_VAUX2_DEDICATED; ded_val = ENABLE_VAUX2_DEDICATED; grp_reg = TWL4030_VAUX2_DEV_GRP; grp_val = ENABLE_VAUX2_DEV_GRP; } gpio_set_value(enable_gpio, 1); gpio_set_value(backlight_gpio, 1); if (0 != t2_out(PM_RECEIVER, ded_val, ded_reg)) return -EIO; if (0 != t2_out(PM_RECEIVER, grp_val, grp_reg)) return -EIO; return 0; } static void sdp2430_panel_disable(struct lcd_panel *panel) { gpio_set_value(enable_gpio, 0); gpio_set_value(backlight_gpio, 0); if (omap_rev() > OMAP3430_REV_ES1_0) { t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED); t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP); msleep(4); } } static unsigned long sdp2430_panel_get_caps(struct lcd_panel *panel) { return 0; } struct lcd_panel sdp2430_panel = { .name = "sdp2430", .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | OMAP_LCDC_INV_HSYNC, .bpp = 16, .data_lines = 16, .x_res = 240, .y_res = 320, .hsw = 3, /* hsync_len (4) - 1 */ .hfp = 3, /* right_margin (4) - 1 */ .hbp = 39, /* left_margin (40) - 1 */ .vsw = 1, /* vsync_len (2) - 1 */ .vfp = 2, /* lower_margin */ .vbp = 7, /* upper_margin (8) - 1 */ .pixel_clock = LCD_PIXCLOCK_MAX, .init = sdp2430_panel_init, .cleanup = sdp2430_panel_cleanup, .enable = sdp2430_panel_enable, .disable = sdp2430_panel_disable, .get_caps = sdp2430_panel_get_caps, }; static int sdp2430_panel_probe(struct platform_device *pdev) { omapfb_register_panel(&sdp2430_panel); return 0; } static int sdp2430_panel_remove(struct platform_device *pdev) { return 0; } static int sdp2430_panel_suspend(struct platform_device *pdev, pm_message_t mesg) { return 0; } static int sdp2430_panel_resume(struct platform_device *pdev) { return 0; } struct platform_driver sdp2430_panel_driver = { .probe = sdp2430_panel_probe, .remove = sdp2430_panel_remove, .suspend = sdp2430_panel_suspend, .resume = sdp2430_panel_resume, .driver = { .name = "sdp2430_lcd", .owner = THIS_MODULE, }, }; static int __init sdp2430_panel_drv_init(void) { return platform_driver_register(&sdp2430_panel_driver); } static void __exit sdp2430_panel_drv_exit(void) { platform_driver_unregister(&sdp2430_panel_driver); } module_init(sdp2430_panel_drv_init); module_exit(sdp2430_panel_drv_exit);