| /* |
| * LCD panel support for the TI LDP board |
| * |
| * Copyright (C) 2007 WindRiver |
| * Author: Stanley Miao <stanley.miao@windriver.com> |
| * |
| * Derived from drivers/video/omap/lcd-2430sdp.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/i2c/twl4030.h> |
| |
| #include <mach/gpio.h> |
| #include <plat/mux.h> |
| #include <asm/mach-types.h> |
| |
| #include "omapfb.h" |
| |
| #define LCD_PANEL_BACKLIGHT_GPIO (15 + OMAP_MAX_GPIO_LINES) |
| #define LCD_PANEL_ENABLE_GPIO (7 + OMAP_MAX_GPIO_LINES) |
| |
| #define LCD_PANEL_RESET_GPIO 55 |
| #define LCD_PANEL_QVGA_GPIO 56 |
| |
| #ifdef CONFIG_FB_OMAP_LCD_VGA |
| #define LCD_XRES 480 |
| #define LCD_YRES 640 |
| #define LCD_PIXCLOCK_MAX 41700 |
| #else |
| #define LCD_XRES 240 |
| #define LCD_YRES 320 |
| #define LCD_PIXCLOCK_MAX 185186 |
| #endif |
| |
| #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) twl4030_i2c_write_u8(c, r, v) |
| |
| |
| static int ldp_panel_init(struct lcd_panel *panel, |
| struct omapfb_device *fbdev) |
| { |
| gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset"); |
| gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga"); |
| gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel"); |
| gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight"); |
| |
| gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0); |
| gpio_direction_output(LCD_PANEL_RESET_GPIO, 0); |
| gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0); |
| gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0); |
| |
| #ifdef CONFIG_FB_OMAP_LCD_VGA |
| gpio_set_value(LCD_PANEL_QVGA_GPIO, 0); |
| #else |
| gpio_set_value(LCD_PANEL_QVGA_GPIO, 1); |
| #endif |
| gpio_set_value(LCD_PANEL_RESET_GPIO, 1); |
| |
| return 0; |
| } |
| |
| static void ldp_panel_cleanup(struct lcd_panel *panel) |
| { |
| gpio_free(LCD_PANEL_BACKLIGHT_GPIO); |
| gpio_free(LCD_PANEL_ENABLE_GPIO); |
| gpio_free(LCD_PANEL_QVGA_GPIO); |
| gpio_free(LCD_PANEL_RESET_GPIO); |
| } |
| |
| static int ldp_panel_enable(struct lcd_panel *panel) |
| { |
| if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED, |
| TWL4030_VPLL2_DEDICATED)) |
| return -EIO; |
| if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP, |
| TWL4030_VPLL2_DEV_GRP)) |
| return -EIO; |
| |
| gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1); |
| gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1); |
| |
| if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED, |
| TWL4030_VAUX3_DEDICATED)) |
| return -EIO; |
| if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP, |
| TWL4030_VAUX3_DEV_GRP)) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static void ldp_panel_disable(struct lcd_panel *panel) |
| { |
| gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0); |
| gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0); |
| |
| t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED); |
| t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP); |
| msleep(4); |
| } |
| |
| static unsigned long ldp_panel_get_caps(struct lcd_panel *panel) |
| { |
| return 0; |
| } |
| |
| struct lcd_panel ldp_panel = { |
| .name = "ldp", |
| .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | |
| OMAP_LCDC_INV_HSYNC, |
| |
| .bpp = 16, |
| .data_lines = 18, |
| .x_res = LCD_XRES, |
| .y_res = LCD_YRES, |
| .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 = ldp_panel_init, |
| .cleanup = ldp_panel_cleanup, |
| .enable = ldp_panel_enable, |
| .disable = ldp_panel_disable, |
| .get_caps = ldp_panel_get_caps, |
| }; |
| |
| static int ldp_panel_probe(struct platform_device *pdev) |
| { |
| omapfb_register_panel(&ldp_panel); |
| return 0; |
| } |
| |
| static int ldp_panel_remove(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg) |
| { |
| return 0; |
| } |
| |
| static int ldp_panel_resume(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| struct platform_driver ldp_panel_driver = { |
| .probe = ldp_panel_probe, |
| .remove = ldp_panel_remove, |
| .suspend = ldp_panel_suspend, |
| .resume = ldp_panel_resume, |
| .driver = { |
| .name = "ldp_lcd", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init ldp_panel_drv_init(void) |
| { |
| return platform_driver_register(&ldp_panel_driver); |
| } |
| |
| static void __exit ldp_panel_drv_exit(void) |
| { |
| platform_driver_unregister(&ldp_panel_driver); |
| } |
| |
| module_init(ldp_panel_drv_init); |
| module_exit(ldp_panel_drv_exit); |