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amd-xgbe: Set the MII control width for the MAC interface 

When running in SGMII mode at speeds below 1000Mbps, the auto-negotition
control register must set the MII control width for the MAC interface
to be 8-bits wide.  By default the width is 4-bits.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas 2017-08-18 09:02:27 -05:00 committed by David S. Miller
parent 3b1ded4e0b
commit f087b506ff
2 changed files with 3 additions and 0 deletions
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1
drivers/net/ethernet/amd/xgbe/xgbe-common.h
View File

@ -1339,6 +1339,7 @@
#define XGBE_AN_CL37_PCS_MODE_BASEX 0x00
#define XGBE_AN_CL37_PCS_MODE_SGMII 0x04
#define XGBE_AN_CL37_TX_CONFIG_MASK 0x08
#define XGBE_AN_CL37_MII_CTRL_8BIT 0x0100
/* Bit setting and getting macros
* The get macro will extract the current bit field value from within

2
drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
View File

@ -982,6 +982,8 @@ static void xgbe_an37_init(struct xgbe_prv_data *pdata)
break;
}
reg |= XGBE_AN_CL37_MII_CTRL_8BIT;
XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg);
netif_dbg(pdata, link, pdata->netdev, "CL37 AN (%s) initialized\n",