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[PATCH] skge: fix stuck irq when fiber down

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The PHY interrupt from the internal fiber is getting
stuck on when the link is down. Add code to handle the
transition and mask it.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2006-10-05 15:49:50 -07:00 committed by Jeff Garzik
parent 6475191001
commit a1bc9b875b
2 changed files with 37 additions and 19 deletions
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53
drivers/net/skge.c
View file

@ -884,6 +884,29 @@ static void skge_link_down(struct skge_port *skge)
printk(KERN_INFO PFX "%s: Link is down.\n", skge->netdev->name);
}
static void xm_link_down(struct skge_hw *hw, int port)
{
struct net_device *dev = hw->dev[port];
struct skge_port *skge = netdev_priv(dev);
u16 cmd, msk;
if (hw->phy_type == SK_PHY_XMAC) {
msk = xm_read16(hw, port, XM_IMSK);
msk |= XM_IS_INP_ASS | XM_IS_LIPA_RC | XM_IS_RX_PAGE | XM_IS_AND;
xm_write16(hw, port, XM_IMSK, msk);
}
cmd = xm_read16(hw, port, XM_MMU_CMD);
cmd &= ~(XM_MMU_ENA_RX | XM_MMU_ENA_TX);
xm_write16(hw, port, XM_MMU_CMD, cmd);
/* dummy read to ensure writing */
(void) xm_read16(hw, port, XM_MMU_CMD);
if (netif_carrier_ok(dev))
skge_link_down(skge);
}
static int __xm_phy_read(struct skge_hw *hw, int port, u16 reg, u16 *val)
{
int i;
@ -1008,14 +1031,7 @@ static void bcom_check_link(struct skge_hw *hw, int port)
status = xm_phy_read(hw, port, PHY_BCOM_STAT);
if ((status & PHY_ST_LSYNC) == 0) {
u16 cmd = xm_read16(hw, port, XM_MMU_CMD);
cmd &= ~(XM_MMU_ENA_RX | XM_MMU_ENA_TX);
xm_write16(hw, port, XM_MMU_CMD, cmd);
/* dummy read to ensure writing */
(void) xm_read16(hw, port, XM_MMU_CMD);
if (netif_carrier_ok(dev))
skge_link_down(skge);
xm_link_down(hw, port);
return;
}
@ -1235,14 +1251,7 @@ static void xm_check_link(struct net_device *dev)
status = xm_phy_read(hw, port, PHY_XMAC_STAT);
if ((status & PHY_ST_LSYNC) == 0) {
u16 cmd = xm_read16(hw, port, XM_MMU_CMD);
cmd &= ~(XM_MMU_ENA_RX | XM_MMU_ENA_TX);
xm_write16(hw, port, XM_MMU_CMD, cmd);
/* dummy read to ensure writing */
(void) xm_read16(hw, port, XM_MMU_CMD);
if (netif_carrier_ok(dev))
skge_link_down(skge);
xm_link_down(hw, port);
return;
}
@ -1568,6 +1577,10 @@ static void genesis_mac_intr(struct skge_hw *hw, int port)
printk(KERN_DEBUG PFX "%s: mac interrupt status 0x%x\n",
skge->netdev->name, status);
if (hw->phy_type == SK_PHY_XMAC &&
(status & (XM_IS_INP_ASS | XM_IS_LIPA_RC)))
xm_link_down(hw, port);
if (status & XM_IS_TXF_UR) {
xm_write32(hw, port, XM_MODE, XM_MD_FTF);
++skge->net_stats.tx_fifo_errors;
@ -1582,7 +1595,7 @@ static void genesis_link_up(struct skge_port *skge)
{
struct skge_hw *hw = skge->hw;
int port = skge->port;
u16 cmd;
u16 cmd, msk;
u32 mode;
cmd = xm_read16(hw, port, XM_MMU_CMD);
@ -1631,7 +1644,11 @@ static void genesis_link_up(struct skge_port *skge)
}
xm_write32(hw, port, XM_MODE, mode);
xm_write16(hw, port, XM_IMSK, XM_DEF_MSK);
msk = XM_DEF_MSK;
if (hw->phy_type != SK_PHY_XMAC)
msk |= XM_IS_INP_ASS; /* disable GP0 interrupt bit */
xm_write16(hw, port, XM_IMSK, msk);
xm_read16(hw, port, XM_ISRC);
/* get MMU Command Reg. */

3
drivers/net/skge.h
View file

@ -2195,7 +2195,8 @@ enum {
XM_IS_RX_COMP = 1<<0, /* Bit 0: Frame Rx Complete */
};
#define XM_DEF_MSK (~(XM_IS_RXC_OV | XM_IS_TXC_OV | XM_IS_RXF_OV | XM_IS_TXF_UR))
#define XM_DEF_MSK (~(XM_IS_INP_ASS | XM_IS_LIPA_RC | \
XM_IS_RXF_OV | XM_IS_TXF_UR))
/* XM_HW_CFG 16 bit r/w Hardware Config Register */