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201 lines
5.1 KiB
201 lines
5.1 KiB
/*
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* LCD panel support for the TI LDP board
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*
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* Copyright (C) 2007 WindRiver
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* Author: Stanley Miao <stanley.miao@windriver.com>
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*
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* Derived from drivers/video/omap/lcd-2430sdp.c
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/i2c/twl.h>
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#include <mach/gpio.h>
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#include <plat/mux.h>
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#include <asm/mach-types.h>
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#include "omapfb.h"
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#define LCD_PANEL_BACKLIGHT_GPIO (15 + OMAP_MAX_GPIO_LINES)
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#define LCD_PANEL_ENABLE_GPIO (7 + OMAP_MAX_GPIO_LINES)
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#define LCD_PANEL_RESET_GPIO 55
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#define LCD_PANEL_QVGA_GPIO 56
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#ifdef CONFIG_FB_OMAP_LCD_VGA
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#define LCD_XRES 480
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#define LCD_YRES 640
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#define LCD_PIXCLOCK_MAX 41700
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#else
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#define LCD_XRES 240
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#define LCD_YRES 320
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#define LCD_PIXCLOCK_MAX 185186
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#endif
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#define PM_RECEIVER TWL4030_MODULE_PM_RECEIVER
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#define ENABLE_VAUX2_DEDICATED 0x09
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#define ENABLE_VAUX2_DEV_GRP 0x20
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#define ENABLE_VAUX3_DEDICATED 0x03
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#define ENABLE_VAUX3_DEV_GRP 0x20
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#define ENABLE_VPLL2_DEDICATED 0x05
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#define ENABLE_VPLL2_DEV_GRP 0xE0
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#define TWL4030_VPLL2_DEV_GRP 0x33
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#define TWL4030_VPLL2_DEDICATED 0x36
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#define t2_out(c, r, v) twl_i2c_write_u8(c, r, v)
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static int ldp_panel_init(struct lcd_panel *panel,
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struct omapfb_device *fbdev)
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{
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gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset");
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gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga");
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gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel");
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gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight");
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gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0);
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gpio_direction_output(LCD_PANEL_RESET_GPIO, 0);
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gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
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gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
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#ifdef CONFIG_FB_OMAP_LCD_VGA
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gpio_set_value(LCD_PANEL_QVGA_GPIO, 0);
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#else
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gpio_set_value(LCD_PANEL_QVGA_GPIO, 1);
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#endif
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gpio_set_value(LCD_PANEL_RESET_GPIO, 1);
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return 0;
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}
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static void ldp_panel_cleanup(struct lcd_panel *panel)
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{
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gpio_free(LCD_PANEL_BACKLIGHT_GPIO);
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gpio_free(LCD_PANEL_ENABLE_GPIO);
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gpio_free(LCD_PANEL_QVGA_GPIO);
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gpio_free(LCD_PANEL_RESET_GPIO);
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}
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static int ldp_panel_enable(struct lcd_panel *panel)
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{
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if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
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TWL4030_VPLL2_DEDICATED))
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return -EIO;
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if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
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TWL4030_VPLL2_DEV_GRP))
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return -EIO;
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gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
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gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1);
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if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED,
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TWL4030_VAUX3_DEDICATED))
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return -EIO;
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if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP,
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TWL4030_VAUX3_DEV_GRP))
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return -EIO;
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return 0;
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}
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static void ldp_panel_disable(struct lcd_panel *panel)
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{
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gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
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gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);
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t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
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t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
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msleep(4);
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}
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static unsigned long ldp_panel_get_caps(struct lcd_panel *panel)
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{
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return 0;
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}
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struct lcd_panel ldp_panel = {
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.name = "ldp",
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.config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
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OMAP_LCDC_INV_HSYNC,
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.bpp = 16,
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.data_lines = 18,
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.x_res = LCD_XRES,
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.y_res = LCD_YRES,
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.hsw = 3, /* hsync_len (4) - 1 */
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.hfp = 3, /* right_margin (4) - 1 */
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.hbp = 39, /* left_margin (40) - 1 */
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.vsw = 1, /* vsync_len (2) - 1 */
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.vfp = 2, /* lower_margin */
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.vbp = 7, /* upper_margin (8) - 1 */
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.pixel_clock = LCD_PIXCLOCK_MAX,
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.init = ldp_panel_init,
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.cleanup = ldp_panel_cleanup,
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.enable = ldp_panel_enable,
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.disable = ldp_panel_disable,
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.get_caps = ldp_panel_get_caps,
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};
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static int ldp_panel_probe(struct platform_device *pdev)
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{
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omapfb_register_panel(&ldp_panel);
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return 0;
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}
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static int ldp_panel_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
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{
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return 0;
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}
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static int ldp_panel_resume(struct platform_device *pdev)
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{
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return 0;
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}
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struct platform_driver ldp_panel_driver = {
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.probe = ldp_panel_probe,
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.remove = ldp_panel_remove,
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.suspend = ldp_panel_suspend,
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.resume = ldp_panel_resume,
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.driver = {
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.name = "ldp_lcd",
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.owner = THIS_MODULE,
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},
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};
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static int __init ldp_panel_drv_init(void)
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{
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return platform_driver_register(&ldp_panel_driver);
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}
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static void __exit ldp_panel_drv_exit(void)
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{
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platform_driver_unregister(&ldp_panel_driver);
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}
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module_init(ldp_panel_drv_init);
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module_exit(ldp_panel_drv_exit);
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