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>
diff --git a/drivers/video/cobalt_lcdfb.c b/drivers/video/cobalt_lcdfb.c
index f56699d..eae46f6 100644
--- a/drivers/video/cobalt_lcdfb.c
+++ b/drivers/video/cobalt_lcdfb.c
@@ -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 @@
{
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)
{