diff options
Diffstat (limited to 'drivers/video/omap/lcd_ldp.c')
| -rw-r--r-- | drivers/video/omap/lcd_ldp.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/video/omap/lcd_ldp.c b/drivers/video/omap/lcd_ldp.c new file mode 100644 index 000000000000..dbfe8974fb94 --- /dev/null +++ b/drivers/video/omap/lcd_ldp.c @@ -0,0 +1,200 @@ +/* + * 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 <mach/mux.h> +#include <mach/omapfb.h> +#include <asm/mach-types.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); |