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sfc: QT202x: Reset before reading PHY id 

Reading standard registers on the QT2025C before its firmware has
booted may cause the boot process to fail.  Therefore, follow the
recommended reset sequence before reading its id registers.  Either
order works for the QT2022C2, so don't differentiate.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Hodgson 2009-11-28 05:34:29 +00:00 committed by David S. Miller
parent fdaa9aed21
commit 47c3d19f60
1 changed files with 8 additions and 14 deletions
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22
drivers/net/sfc/qt202x_phy.c
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@ -138,33 +138,27 @@ static int qt202x_reset_phy(struct efx_nic *efx)
static int qt202x_phy_init(struct efx_nic *efx)
{
struct qt202x_phy_data *phy_data;
u32 devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS);
u32 devid;
int rc;
rc = qt202x_reset_phy(efx);
if (rc) {
EFX_ERR(efx, "PHY init failed\n");
return rc;
}
phy_data = kzalloc(sizeof(struct qt202x_phy_data), GFP_KERNEL);
if (!phy_data)
return -ENOMEM;
efx->phy_data = phy_data;
devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS);
EFX_INFO(efx, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid),
efx_mdio_id_rev(devid));
phy_data->phy_mode = efx->phy_mode;
rc = qt202x_reset_phy(efx);
EFX_INFO(efx, "PHY init %s.\n",
rc ? "failed" : "successful");
if (rc < 0)
goto fail;
return 0;
fail:
kfree(efx->phy_data);
efx->phy_data = NULL;
return rc;
}
static int qt202x_link_ok(struct efx_nic *efx)