diff options
| author | Robert Foss <robert.foss@collabora.com> | 2016-08-29 16:32:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-01 07:07:06 +0300 |
| commit | 4c1442aa8c2c0a2513516aeac184ea172bb04dec (patch) | |
| tree | a05af0303ea972bbd75f5421015aaf761459e225 /drivers/net/usb/asix_devices.c | |
| parent | 8a46f665833a2085e402bd0827be380f161f09ef (diff) | |
| download | linux-4c1442aa8c2c0a2513516aeac184ea172bb04dec.tar.xz | |
net: asix: Fix AX88772x resume failures
From: Allan Chou <allan@asix.com.tw>
The change fixes AX88772x resume failure by
- Restore incorrect AX88772A PHY registers when resetting
- Need to stop MAC operation when suspending
- Need to restart MII when restoring PHY
Signed-off-by: Allan Chou <allan@asix.com.tw>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Tested-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/asix_devices.c')
| -rw-r--r-- | drivers/net/usb/asix_devices.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index ebeb73014fdf..083dc2ef10c8 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -35,6 +35,15 @@ #define PHY_MODE_RTL8211CL 0x000C +#define AX88772A_PHY14H 0x14 +#define AX88772A_PHY14H_DEFAULT 0x442C + +#define AX88772A_PHY15H 0x15 +#define AX88772A_PHY15H_DEFAULT 0x03C8 + +#define AX88772A_PHY16H 0x16 +#define AX88772A_PHY16H_DEFAULT 0x4044 + struct ax88172_int_data { __le16 res1; u8 link; @@ -424,7 +433,7 @@ static int ax88772a_hw_reset(struct usbnet *dev, int in_pm) { struct asix_data *data = (struct asix_data *)&dev->data; int ret, embd_phy; - u16 rx_ctl; + u16 rx_ctl, phy14h, phy15h, phy16h; u8 chipcode = 0; ret = asix_write_gpio(dev, AX_GPIO_RSE, 5, in_pm); @@ -482,6 +491,32 @@ static int ax88772a_hw_reset(struct usbnet *dev, int in_pm) ret); goto out; } + } else if ((chipcode & AX_CHIPCODE_MASK) == AX_AX88772A_CHIPCODE) { + /* Check if the PHY registers have default settings */ + phy14h = asix_mdio_read_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY14H); + phy15h = asix_mdio_read_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY15H); + phy16h = asix_mdio_read_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY16H); + + netdev_dbg(dev->net, + "772a_hw_reset: MR20=0x%x MR21=0x%x MR22=0x%x\n", + phy14h, phy15h, phy16h); + + /* Restore PHY registers default setting if not */ + if (phy14h != AX88772A_PHY14H_DEFAULT) + asix_mdio_write_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY14H, + AX88772A_PHY14H_DEFAULT); + if (phy15h != AX88772A_PHY15H_DEFAULT) + asix_mdio_write_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY15H, + AX88772A_PHY15H_DEFAULT); + if (phy16h != AX88772A_PHY16H_DEFAULT) + asix_mdio_write_nopm(dev->net, dev->mii.phy_id, + AX88772A_PHY16H, + AX88772A_PHY16H_DEFAULT); } ret = asix_write_cmd(dev, AX_CMD_WRITE_IPG0, @@ -543,6 +578,15 @@ static const struct net_device_ops ax88772_netdev_ops = { static void ax88772_suspend(struct usbnet *dev) { struct asix_common_private *priv = dev->driver_priv; + u16 medium; + + /* Stop MAC operation */ + medium = asix_read_medium_status(dev, 0); + medium &= ~AX_MEDIUM_RE; + asix_write_medium_mode(dev, medium, 0); + + netdev_dbg(dev->net, "ax88772_suspend: medium=0x%04x\n", + asix_read_medium_status(dev, 0)); /* Preserve BMCR for restoring */ priv->presvd_phy_bmcr = @@ -577,6 +621,7 @@ static void ax88772_restore_phy(struct usbnet *dev) asix_mdio_write_nopm(dev->net, dev->mii.phy_id, MII_BMCR, priv->presvd_phy_bmcr); + mii_nway_restart(&dev->mii); priv->presvd_phy_advertise = 0; priv->presvd_phy_bmcr = 0; } |