From afd1dee896e8b1cbd24258ac673aeccd803ff582 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 22 Apr 2008 10:46:42 +1000 Subject: [PATCH] ibm_newemac: Add support for 460EX/GT-type MAL rx-channel handling On some 4xx PPC's (e.g. 460EX/GT), the rx channel number is a multiple of 8 (e.g. 8 for EMAC1, 16 for EMAC2), but enabling in MAL_RXCASR needs the divided by 8 value for the bitmask. Signed-off-by: Stefan Roese Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/mal.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/net/ibm_newemac/mal.c b/drivers/net/ibm_newemac/mal.c index 6869f08c9dcb..fb9c9eb114f4 100644 --- a/drivers/net/ibm_newemac/mal.c +++ b/drivers/net/ibm_newemac/mal.c @@ -136,6 +136,14 @@ void mal_enable_rx_channel(struct mal_instance *mal, int channel) { unsigned long flags; + /* + * On some 4xx PPC's (e.g. 460EX/GT), the rx channel is a multiple + * of 8, but enabling in MAL_RXCASR needs the divided by 8 value + * for the bitmask + */ + if (!(channel % 8)) + channel >>= 3; + spin_lock_irqsave(&mal->lock, flags); MAL_DBG(mal, "enable_rx(%d)" NL, channel); @@ -148,6 +156,14 @@ void mal_enable_rx_channel(struct mal_instance *mal, int channel) void mal_disable_rx_channel(struct mal_instance *mal, int channel) { + /* + * On some 4xx PPC's (e.g. 460EX/GT), the rx channel is a multiple + * of 8, but enabling in MAL_RXCASR needs the divided by 8 value + * for the bitmask + */ + if (!(channel % 8)) + channel >>= 3; + set_mal_dcrn(mal, MAL_RXCARR, MAL_CHAN_MASK(channel)); MAL_DBG(mal, "disable_rx(%d)" NL, channel); -- 2.30.2