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path: root/drivers/net/fec.c
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Diffstat (limited to 'drivers/net/fec.c')
-rw-r--r--drivers/net/fec.c55
1 files changed, 25 insertions, 30 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index b4afd7a..937f1b4 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -187,6 +187,7 @@ struct fec_enet_private {
int index;
int link;
int full_duplex;
+ struct completion mdio_done;
};
static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
@@ -205,7 +206,7 @@ static void fec_stop(struct net_device *dev);
#define FEC_MMFR_TA (2 << 16)
#define FEC_MMFR_DATA(v) (v & 0xffff)
-#define FEC_MII_TIMEOUT 10000
+#define FEC_MII_TIMEOUT 1000 /* us */
/* Transmitter timeout */
#define TX_TIMEOUT (2 * HZ)
@@ -334,6 +335,11 @@ fec_enet_interrupt(int irq, void * dev_id)
ret = IRQ_HANDLED;
fec_enet_tx(dev);
}
+
+ if (int_events & FEC_ENET_MII) {
+ ret = IRQ_HANDLED;
+ complete(&fep->mdio_done);
+ }
} while (int_events);
return ret;
@@ -608,18 +614,13 @@ spin_unlock:
phy_print_status(phy_dev);
}
-/*
- * NOTE: a MII transaction is during around 25 us, so polling it...
- */
static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
struct fec_enet_private *fep = bus->priv;
- int timeout = FEC_MII_TIMEOUT;
+ unsigned long time_left;
fep->mii_timeout = 0;
-
- /* clear MII end of transfer bit*/
- writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
+ init_completion(&fep->mdio_done);
/* start a read op */
writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
@@ -627,13 +628,12 @@ static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
- while (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_MII)) {
- cpu_relax();
- if (timeout-- < 0) {
- fep->mii_timeout = 1;
- printk(KERN_ERR "FEC: MDIO read timeout\n");
- return -ETIMEDOUT;
- }
+ time_left = wait_for_completion_timeout(&fep->mdio_done,
+ usecs_to_jiffies(FEC_MII_TIMEOUT));
+ if (time_left == 0) {
+ fep->mii_timeout = 1;
+ printk(KERN_ERR "FEC: MDIO read timeout\n");
+ return -ETIMEDOUT;
}
/* return value */
@@ -644,12 +644,10 @@ static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
u16 value)
{
struct fec_enet_private *fep = bus->priv;
- int timeout = FEC_MII_TIMEOUT;
+ unsigned long time_left;
fep->mii_timeout = 0;
-
- /* clear MII end of transfer bit*/
- writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
+ init_completion(&fep->mdio_done);
/* start a read op */
writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
@@ -658,13 +656,12 @@ static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
- while (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_MII)) {
- cpu_relax();
- if (timeout-- < 0) {
- fep->mii_timeout = 1;
- printk(KERN_ERR "FEC: MDIO write timeout\n");
- return -ETIMEDOUT;
- }
+ time_left = wait_for_completion_timeout(&fep->mdio_done,
+ usecs_to_jiffies(FEC_MII_TIMEOUT));
+ if (time_left == 0) {
+ fep->mii_timeout = 1;
+ printk(KERN_ERR "FEC: MDIO write timeout\n");
+ return -ETIMEDOUT;
}
return 0;
@@ -1216,7 +1213,8 @@ fec_restart(struct net_device *dev, int duplex)
writel(0, fep->hwp + FEC_R_DES_ACTIVE);
/* Enable interrupts we wish to service */
- writel(FEC_ENET_TXF | FEC_ENET_RXF, fep->hwp + FEC_IMASK);
+ writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
+ fep->hwp + FEC_IMASK);
}
static void
@@ -1236,9 +1234,6 @@ fec_stop(struct net_device *dev)
writel(1, fep->hwp + FEC_ECNTRL);
udelay(10);
- /* Clear outstanding MII command interrupts. */
- writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
-
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
}