From 9ee107721f746b0b81dcacf2f59c4f48d4210b9e Mon Sep 17 00:00:00 2001 From: Carl-Daniel Hailfinger Date: Sat, 16 May 2009 01:23:55 +0000 Subject: Add generic 16 bit and 32 bit chip read/write emulation to the external flasher infrastructure The emulation works by splitting 32 bit accesses into 16 bit accesses and 16 bit accesses into to 8 bit accesses. That way, external flashers can mix and match the amount of emulation they need. Corresponding to flashrom svn r517. Signed-off-by: Carl-Daniel Hailfinger Acked-by: Uwe Hermann --- internal.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'internal.c') diff --git a/internal.c b/internal.c index bbbf58b..f10d0d5 100644 --- a/internal.c +++ b/internal.c @@ -168,3 +168,34 @@ uint32_t internal_chip_readl(const volatile void *addr) return *(volatile uint32_t *) addr; } +/* Little-endian fallback for drivers not supporting 16 bit accesses */ +void fallback_chip_writew(uint16_t val, volatile void *addr) +{ + chip_writeb(val & 0xff, addr); + chip_writeb((val >> 8) & 0xff, addr + 1); +} + +/* Little-endian fallback for drivers not supporting 16 bit accesses */ +uint16_t fallback_chip_readw(const volatile void *addr) +{ + uint16_t val; + val = chip_readb(addr); + val |= chip_readb(addr + 1) << 8; + return val; +} + +/* Little-endian fallback for drivers not supporting 32 bit accesses */ +void fallback_chip_writel(uint32_t val, volatile void *addr) +{ + chip_writew(val & 0xffff, addr); + chip_writew((val >> 16) & 0xffff, addr + 2); +} + +/* Little-endian fallback for drivers not supporting 32 bit accesses */ +uint32_t fallback_chip_readl(const volatile void *addr) +{ + uint32_t val; + val = chip_readw(addr); + val |= chip_readw(addr + 2) << 16; + return val; +} -- cgit v1.1