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macb: Don't restart autonegotiation if we already have link

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Rework macb_phy_init so that it doesn't attempt to re-negotiate if the
link is already up.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2007-05-02 13:31:53 +02:00
parent 04fcb5d38b
commit f2134f8e9e
1 changed files with 32 additions and 25 deletions
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57
drivers/macb.c
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@ -292,6 +292,32 @@ static int macb_recv(struct eth_device *netdev)
return 0; return 0;
} }
static void macb_phy_reset(struct macb_device *macb)
{
struct eth_device *netdev = &macb->netdev;
int i;
u16 status, adv;
adv = ADVERTISE_CSMA | ADVERTISE_ALL;
macb_mdio_write(macb, MII_ADVERTISE, adv);
printf("%s: Starting autonegotiation...\n", netdev->name);
macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
| BMCR_ANRESTART));
for (i = 0; i < CFG_MACB_AUTONEG_TIMEOUT / 100; i++) {
status = macb_mdio_read(macb, MII_BMSR);
if (status & BMSR_ANEGCOMPLETE)
break;
udelay(100);
}
if (status & BMSR_ANEGCOMPLETE)
printf("%s: Autonegotiation complete\n", netdev->name);
else
printf("%s: Autonegotiation timed out (status=0x%04x)\n",
netdev->name, status);
}
static int macb_phy_init(struct macb_device *macb) static int macb_phy_init(struct macb_device *macb)
{ {
struct eth_device *netdev = &macb->netdev; struct eth_device *netdev = &macb->netdev;
@ -307,36 +333,16 @@ static int macb_phy_init(struct macb_device *macb)
return 0; return 0;
} }
adv = ADVERTISE_CSMA | ADVERTISE_ALL; status = macb_mdio_read(macb, MII_BMSR);
macb_mdio_write(macb, MII_ADVERTISE, adv);
printf("%s: Starting autonegotiation...\n", netdev->name);
macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
| BMCR_ANRESTART));
#if 0
for (i = 0; i < 9; i++)
printf("mii%d: 0x%04x\n", i, macb_mdio_read(macb, i));
#endif
for (i = 0; i < CFG_MACB_AUTONEG_TIMEOUT / 100; i++) {
status = macb_mdio_read(macb, MII_BMSR);
if (status & BMSR_ANEGCOMPLETE)
break;
udelay(100);
}
if (status & BMSR_ANEGCOMPLETE)
printf("%s: Autonegotiation complete\n", netdev->name);
else
printf("%s: Autonegotiation timed out (status=0x%04x)\n",
netdev->name, status);
if (!(status & BMSR_LSTATUS)) { if (!(status & BMSR_LSTATUS)) {
/* Try to re-negotiate if we don't have link already. */
macb_phy_reset(macb);
for (i = 0; i < CFG_MACB_AUTONEG_TIMEOUT / 100; i++) { for (i = 0; i < CFG_MACB_AUTONEG_TIMEOUT / 100; i++) {
udelay(100);
status = macb_mdio_read(macb, MII_BMSR); status = macb_mdio_read(macb, MII_BMSR);
if (status & BMSR_LSTATUS) if (status & BMSR_LSTATUS)
break; break;
udelay(100);
} }
} }
@ -345,6 +351,7 @@ static int macb_phy_init(struct macb_device *macb)
netdev->name, status); netdev->name, status);
return 0; return 0;
} else { } else {
adv = macb_mdio_read(macb, MII_ADVERTISE);
lpa = macb_mdio_read(macb, MII_LPA); lpa = macb_mdio_read(macb, MII_LPA);
media = mii_nway_result(lpa & adv); media = mii_nway_result(lpa & adv);
speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)