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[PATCH 09/10] cobalt_lcdfb: LCD panel framebuffer support for SEAD-3 pla

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH 09/10] cobalt_lcdfb: LCD panel framebuffer support for SEAD-3 platform.
From: "Steven J. Hill" <sjhill@mips.com>
Date: Sat, 7 Apr 2012 11:56:40 -0500
Cc: linux-fbdev@vger.kernel.org, "Steven J. Hill" <sjhill@mips.com>, Douglas Leung <douglas@mips.com>, Chris Dearman <chris@mips.com>
Sender: linux-mips-bounce@linux-mips.org
From: "Steven J. Hill" <sjhill@mips.com>

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>
---
 drivers/video/Kconfig        |    2 +-
 drivers/video/cobalt_lcdfb.c |   45 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index a8a897a..e921a45 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -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"
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 @@ 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)
 {
-- 
1.7.9.6


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