From d93e2212f962668b3dce091ff5edc33f2347fe37 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 20 Feb 2007 13:17:42 +0100 Subject: [PATCH] [PATCH] Update SystemACE driver for 16bit access This patch removes some problems when the Xilinx SystemACE driver is used with 16bit access on an big endian platform (like the AMCC Katmai). Signed-off-by: Stefan Roese --- drivers/systemace.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/systemace.c b/drivers/systemace.c index 9502623..3bd2ea9 100644 --- a/drivers/systemace.c +++ b/drivers/systemace.c @@ -66,8 +66,8 @@ writeb(val>>8, CFG_SYSTEMACE_BASE+off+1);} #endif #else -#define ace_readw(off) (readw(CFG_SYSTEMACE_BASE+off)) -#define ace_writew(val, off) (writew(val, CFG_SYSTEMACE_BASE+off)) +#define ace_readw(off) (in16(CFG_SYSTEMACE_BASE+off)) +#define ace_writew(val, off) (out16(CFG_SYSTEMACE_BASE+off,val)) #endif /* */ @@ -119,6 +119,14 @@ block_dev_desc_t *systemace_get_dev(int dev) systemace_dev.removable = 1; systemace_dev.block_read = systemace_read; +#if (CFG_SYSTEMACE_WIDTH == 16) + /* + * By default the SystemACE comes up in 8-bit mode. + * Ensure that 16-bit mode gets enabled. + */ + ace_writew(0x0001, 0); +#endif + init_part(&systemace_dev); } @@ -197,7 +205,7 @@ static unsigned long systemace_read(int dev, unsigned long start, #endif /* Write LBA block address */ ace_writew((start >> 0) & 0xffff, 0x10); - ace_writew((start >> 16) & 0x00ff, 0x12); + ace_writew((start >> 16) & 0x0fff, 0x12); /* NOTE: in the Write Sector count below, a count of 0 causes a transfer of 256, so &0xff gives the right -- 2.7.4