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skge: retry on MAC shutdown 

Make sure and retry when shutting down the MAC. This code is copied
from sk98lin driver.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2007-11-26 11:54:50 -08:00 committed by Jeff Garzik
parent d08b9bdf02
commit 799b21d2bd
1 changed files with 8 additions and 11 deletions
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19
drivers/net/skge.c
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@ -1713,7 +1713,7 @@ static void genesis_stop(struct skge_port *skge)
{
struct skge_hw *hw = skge->hw;
int port = skge->port;
u32 reg;
unsigned retries = 1000;
genesis_reset(hw, port);
@ -1721,20 +1721,17 @@ static void genesis_stop(struct skge_port *skge)
skge_write16(hw, B3_PA_CTRL,
port == 0 ? PA_CLR_TO_TX1 : PA_CLR_TO_TX2);
/*
* If the transfer sticks at the MAC the STOP command will not
* terminate if we don't flush the XMAC's transmit FIFO !
*/
xm_write32(hw, port, XM_MODE,
xm_read32(hw, port, XM_MODE)|XM_MD_FTF);
/* Reset the MAC */
skge_write16(hw, SK_REG(port, TX_MFF_CTRL1), MFF_SET_MAC_RST);
skge_write16(hw, SK_REG(port, TX_MFF_CTRL1), MFF_CLR_MAC_RST);
do {
skge_write16(hw, SK_REG(port, TX_MFF_CTRL1), MFF_SET_MAC_RST);
if (!(skge_read16(hw, SK_REG(port, TX_MFF_CTRL1)) & MFF_SET_MAC_RST))
break;
} while (--retries > 0);
/* For external PHYs there must be special handling */
if (hw->phy_type != SK_PHY_XMAC) {
reg = skge_read32(hw, B2_GP_IO);
u32 reg = skge_read32(hw, B2_GP_IO);
if (port == 0) {
reg |= GP_DIR_0;
reg &= ~GP_IO_0;