diff options
| author | Steve Glendinning <steve.glendinning@smsc.com> | 2010-03-16 09:03:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-16 14:15:44 -0700 |
| commit | db443c441e204cecc1bcec490d40997db988ce3a (patch) | |
| tree | 74197ec00dbcddf4882ef014ff5d1074b283ee30 /drivers/net/usb | |
| parent | 3feec9095d12e311b7d4eb7fe7e5dfa75d4a72a5 (diff) | |
smsc95xx: wait for PHY to complete reset during init
This patch ensures the PHY correctly completes its reset before
setting register values.
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb')
| -rw-r--r-- | drivers/net/usb/smsc95xx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index df9179a1c93..d222d7e2527 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -709,6 +709,8 @@ static void smsc95xx_start_rx_path(struct usbnet *dev) static int smsc95xx_phy_initialize(struct usbnet *dev) { + int bmcr, timeout = 0; + /* Initialize MII structure */ dev->mii.dev = dev->net; dev->mii.mdio_read = smsc95xx_mdio_read; @@ -717,7 +719,20 @@ static int smsc95xx_phy_initialize(struct usbnet *dev) dev->mii.reg_num_mask = 0x1f; dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; + /* reset phy and wait for reset to complete */ smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); + + do { + msleep(10); + bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); + timeout++; + } while ((bmcr & MII_BMCR) && (timeout < 100)); + + if (timeout >= 100) { + netdev_warn(dev->net, "timeout on PHY Reset"); + return -EIO; + } + smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); |