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macb: allow GEM to have configurable receive buffer size

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GEM has configurable receive buffer sizes so requires this to be
programmed up.  Any size < 2048 and a multiple of 64 bytes is permitted.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This commit is contained in:
Jamie Iles
2011-03-14 17:38:30 +00:00
parent 757a03c6e0
commit 0116da4fcc
2 changed files with 22 additions and 0 deletions
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5
drivers/net/ethernet/cadence/macb.h
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@@ -64,6 +64,7 @@
/* GEM register offsets. */
#define GEM_NCFGR 0x0004
#define GEM_USRIO 0x000c
#define GEM_DMACFG 0x0010
#define GEM_HRB 0x0080
#define GEM_HRT 0x0084
#define GEM_SA1B 0x0088
@@ -154,6 +155,10 @@
#define GEM_DBW64 1
#define GEM_DBW128 2
/* Bitfields in DMACFG. */
#define GEM_RXBS_OFFSET 16
#define GEM_RXBS_SIZE 8
/* Bitfields in NSR */
#define MACB_NSR_LINK_OFFSET 0
#define MACB_NSR_LINK_SIZE 1