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authorStephen Hemminger <shemminger@linux-foundation.org>2007-11-26 11:54:50 -0800
committerJeff Garzik <jeff@garzik.org>2007-12-01 16:32:29 -0500
commit799b21d2bddd43145130e509efb92339eabafef9 (patch)
tree2a5ea59435d0b723e98d57b9dc01f919ece5b78b /drivers/net/skge.c
parentd08b9bdf0264a8134677373f97641712062c603f (diff)
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>
Diffstat (limited to 'drivers/net/skge.c')
-rw-r--r--drivers/net/skge.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 82edf44b9e2..b680cb08e9c 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -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;