From: Tetsuyuki Kobayashi koba@kmckk.co.jp
Problem: Linux kernel hangs up when it write a file to NFS mounted directory. Solution: Modify bus controller setting for CS4, which connected smsc9221 ethernet controller.
Detail: Modify CS4BCR bit[29:28] (IWW[1:0]) from 00 to 11. It inserts 4 idle cycles between Write-Read/Write-Write cycles. Modify CS4WCR bit[18:16] (WW[2:0]) from 101 to 111 It specifies the number of cycles necessary for write access.
Signed-off-by: Tetsuyuki Kobayashi koba@kmckk.co.jp --- Changes for v3: - New
board/kmc/kzm9g/kzm9g.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/board/kmc/kzm9g/kzm9g.c b/board/kmc/kzm9g/kzm9g.c index 3716483..8cefbef 100644 --- a/board/kmc/kzm9g/kzm9g.c +++ b/board/kmc/kzm9g/kzm9g.c @@ -31,9 +31,9 @@ DECLARE_GLOBAL_DATA_PTR;
#define CS0BCR_D (0x06C00400) -#define CS4BCR_D (0x06C00400) +#define CS4BCR_D (0x36C00400) #define CS0WCR_D (0x55062C42) -#define CS4WCR_D (0x19051443) +#define CS4WCR_D (0x19071443) #define CMNCR_BROMMD0 (1 << 21) #define CMNCR_BROMMD1 (1 << 22) #define CMNCR_BROMMD (CMNCR_BROMMD0|CMNCR_BROMMD1)