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| author | Steven J. Hill <sjhill@mips.com> | 2012-04-18 09:13:51 -0500 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2012-04-29 19:34:05 +0000 |
| commit | 13f36e9ea0f1419039763e7ba947fccd7f4b5a41 (patch) | |
| tree | 03492958965202b57a11406efe3b4744e2009068 /drivers/video/cobalt_lcdfb.c | |
| parent | d313a86d2efb2c5568832389663322e93e291c59 (diff) | |
| download | lwn-13f36e9ea0f1419039763e7ba947fccd7f4b5a41.tar.gz lwn-13f36e9ea0f1419039763e7ba947fccd7f4b5a41.zip | |
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>
Diffstat (limited to 'drivers/video/cobalt_lcdfb.c')
| -rw-r--r-- | drivers/video/cobalt_lcdfb.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/video/cobalt_lcdfb.c b/drivers/video/cobalt_lcdfb.c index f56699d8122a..eae46f6457e2 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) { |