carl9170 firmware: fix max beacon length

According to AR9170's data sheet, the
beacon length register only cares about
bits 8:0. So the max length [with 4
reserved bytes for the FCS] is at 511.

Note:

Because the beacon has to be stored in the
DMA memory region, we have to be careful
so we don't waste precious memory due to
alignment and padding. Therefore I decided
to reduce the max beacon length even more
down to 480 bytes. [This saves one 320 byte
DMA block from becoming unused padding, when
the default 2 vif configuration is selected].

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>

diff --git a/include/shared/hw.h b/include/shared/hw.h
index fa834c1460f0033b4b6e1273952129d12750898a..0db874abde500750f7365ed6a9c254b297d03025 100644 (file)
--- a/include/shared/hw.h
+++ b/include/shared/hw.h
@@ -384,7 +384,7 @@
 
 #define        AR9170_MAC_REG_BCN_ADDR                 (AR9170_MAC_REG_BASE + 0xd84)
 #define        AR9170_MAC_REG_BCN_LENGTH               (AR9170_MAC_REG_BASE + 0xd88)
-#define                AR9170_MAC_BCN_LENGTH_MAX               256
+#define                AR9170_MAC_BCN_LENGTH_MAX               (512 - 32)
 
 #define AR9170_MAC_REG_BCN_STATUS              (AR9170_MAC_REG_BASE + 0xd8c)