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cobalt_lcdfb: LCD panel framebuffer support for SEAD-3 platform. 

Add support for LCD panel on MIPS SEAD-3 development platform.

Signed-off-by: Douglas Leung <douglas@mips.com>
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Steven J. Hill <sjhill@mips.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
hifive-unleashed-5.1
Steven J. Hill 2012-04-18 09:13:51 -05:00 committed by Florian Tobias Schandinat
parent d313a86d2e
commit 13f36e9ea0
2 changed files with 45 additions and 2 deletions
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2
drivers/video/Kconfig
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@ -2210,7 +2210,7 @@ config FB_XILINX
config FB_COBALT
tristate "Cobalt server LCD frame buffer support"
depends on FB && MIPS_COBALT
depends on FB && (MIPS_COBALT || MIPS_SEAD3)
config FB_SH7760
bool "SH7760/SH7763/SH7720/SH7721 LCDC support"

45
drivers/video/cobalt_lcdfb.c
View File

@ -1,7 +1,8 @@
/*
* Cobalt server LCD frame buffer driver.
* Cobalt/SEAD3 LCD frame buffer driver.
*
* Copyright (C) 2008 Yoichi Yuasa <yuasa@linux-mips.org>
* Copyright (C) 2012 MIPS Technologies, Inc.
*
* 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
@ -62,6 +63,7 @@
#define LCD_CUR_POS(x) ((x) & LCD_CUR_POS_MASK)
#define LCD_TEXT_POS(x) ((x) | LCD_TEXT_MODE)
#ifdef CONFIG_MIPS_COBALT
static inline void lcd_write_control(struct fb_info *info, u8 control)
{
writel((u32)control << 24, info->screen_base);
@ -81,6 +83,47 @@ static inline u8 lcd_read_data(struct fb_info *info)
{
return readl(info->screen_base + LCD_DATA_REG_OFFSET) >> 24;
}
#else
#define LCD_CTL 0x00
#define LCD_DATA 0x08
#define CPLD_STATUS 0x10
#define CPLD_DATA 0x18
static inline void cpld_wait(struct fb_info *info)
{
do {
} while (readl(info->screen_base + CPLD_STATUS) & 1);
}
static inline void lcd_write_control(struct fb_info *info, u8 control)
{
cpld_wait(info);
writel(control, info->screen_base + LCD_CTL);
}
static inline u8 lcd_read_control(struct fb_info *info)
{
cpld_wait(info);
readl(info->screen_base + LCD_CTL);
cpld_wait(info);
return readl(info->screen_base + CPLD_DATA) & 0xff;
}
static inline void lcd_write_data(struct fb_info *info, u8 data)
{
cpld_wait(info);
writel(data, info->screen_base + LCD_DATA);
}
static inline u8 lcd_read_data(struct fb_info *info)
{
cpld_wait(info);
readl(info->screen_base + LCD_DATA);
cpld_wait(info);
return readl(info->screen_base + CPLD_DATA) & 0xff;
}
#endif
static int lcd_busy_wait(struct fb_info *info)
{