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| author | Marc Zyngier <maz@misterjones.org> | 2009-12-26 21:24:12 +0100 |
|---|---|---|
| committer | Eric Miao <eric.y.miao@gmail.com> | 2009-12-29 14:11:31 +0800 |
| commit | 5f86cebaa56268f1afa2321e6d424530b1a49a12 (patch) | |
| tree | b3851f9aed72a289afc52b96001df1662bac51c2 /arch | |
| parent | 100627b4bacd0bd669aab5a68f8a0bfd0d28d002 (diff) | |
| download | linux-5f86cebaa56268f1afa2321e6d424530b1a49a12.tar.gz linux-5f86cebaa56268f1afa2321e6d424530b1a49a12.tar.bz2 linux-5f86cebaa56268f1afa2321e6d424530b1a49a12.zip | |
[ARM] pxa/zeus: relax memory timings on Zeus ethernet ports
DM9000s on Zeus sometime fail under heavy load.
Relaxing the timings a bit seems to be of a great help.
Signed-off-by: Marc Zyngier <maz@misterjones.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-pxa/zeus.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c index 865df5d840e7..2f480a2b1531 100644 --- a/arch/arm/mach-pxa/zeus.c +++ b/arch/arm/mach-pxa/zeus.c @@ -726,9 +726,18 @@ static mfp_cfg_t zeus_pin_config[] __initdata = { GPIO99_GPIO, /* CF RDY */ }; +/* + * DM9k MSCx settings: SRAM, 16 bits + * 17 cycles delay first access + * 5 cycles delay next access + * 13 cycles recovery time + * faster device + */ +#define DM9K_MSC_VALUE 0xe4c9 + static void __init zeus_init(void) { - u16 dm9000_msc = 0xe279; + u16 dm9000_msc = DM9K_MSC_VALUE; system_rev = __raw_readw(ZEUS_CPLD_VERSION); pr_info("Zeus CPLD V%dI%d\n", (system_rev & 0xf0) >> 4, (system_rev & 0x0f)); |