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omapfb: add support for the ZOOM MDK LCD
Add glue to control the OMAP_LDP LCD as a frame buffer device using the existing dispc.c driver under omapfb. Patch updated for mainline kernel. Note that the drivers/video/omap should be updated to pass omap_lcd_config in platform_data. The patch should also be updated to compile if twl4030 is not selected, and eventually to use the regulator framework. Fixed-by: Jarkko Nikula <jarkko.nikula@gmail.com> Fixed-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Stanley.Miao <stanley.miao@windriver.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Imre Deak <imre.deak@nokia.com> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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) | ||
|
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|
|
||
| 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 */ | ||
|
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| .pixel_clock = LCD_PIXCLOCK_MAX, | ||
|
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| .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); |