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ibm_newemac: Add support for 460EX/GT-type MAL rx-channel handling

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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 <sr@denx.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Stefan Roese 2008-04-22 10:46:42 +10:00 • committed by Jeff Garzik
parent f34ebab68a
commit afd1dee896
1 changed files with 16 additions and 0 deletions
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16
drivers/net/ibm_newemac/mal.c
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@ -136,6 +136,14 @@ void mal_enable_rx_channel(struct mal_instance *mal, int channel)
{ {
unsigned long flags; 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); spin_lock_irqsave(&mal->lock, flags);
MAL_DBG(mal, "enable_rx(%d)" NL, channel); 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) 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)); set_mal_dcrn(mal, MAL_RXCARR, MAL_CHAN_MASK(channel));
MAL_DBG(mal, "disable_rx(%d)" NL, channel); MAL_DBG(mal, "disable_rx(%d)" NL, channel);