+ switch (ksz9xx1_phy_get_id(phydev) & MII_KSZ9x31_SILICON_REV_MASK) {
+ case PHY_ID_KSZ9031:
+ /*
+ * The PHY adds 1.2ns for the RXC and 0ns for TXC clock by
+ * default. The MAC and the layout don't add a skew between
+ * clock and data.
+ * Add 0.3ns for the RXC path and 0.96 + 0.42 ns (1.38 ns) for
+ * the TXC path to get the required clock skews.
+ */
+ /* control data pad skew - devaddr = 0x02, register = 0x04 */
+ ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC,
+ 0x0070);
+ /* rx data pad skew - devaddr = 0x02, register = 0x05 */
+ ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC,
+ 0x7777);
+ /* tx data pad skew - devaddr = 0x02, register = 0x06 */
+ ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC,
+ 0x0000);
+ /* gtx and rx clock pad skew - devaddr = 0x02,register = 0x08 */
+ ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9031_EXT_RGMII_CLOCK_SKEW,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC,
+ 0x03f4);
+ break;
+ case PHY_ID_KSZ9131:
+ default:
+ /* read rxc dll control - devaddr = 0x2, register = 0x4c */
+ tmp = ksz9031_phy_extended_read(phydev, 0x02,
+ MII_KSZ9131_EXT_RGMII_2NS_SKEW_RXDLL,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC);
+ /* disable rxdll bypass (enable 2ns skew delay on RXC) */
+ tmp &= ~MII_KSZ9131_RXTXDLL_BYPASS;
+ /* rxc data pad skew 2ns - devaddr = 0x02, register = 0x4c */
+ tmp = ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9131_EXT_RGMII_2NS_SKEW_RXDLL,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC, tmp);
+ /* read txc dll control - devaddr = 0x02, register = 0x4d */
+ tmp = ksz9031_phy_extended_read(phydev, 0x02,
+ MII_KSZ9131_EXT_RGMII_2NS_SKEW_TXDLL,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC);
+ /* disable txdll bypass (enable 2ns skew delay on TXC) */
+ tmp &= ~MII_KSZ9131_RXTXDLL_BYPASS;
+ /* rxc data pad skew 2ns - devaddr = 0x02, register = 0x4d */
+ tmp = ksz9031_phy_extended_write(phydev, 0x02,
+ MII_KSZ9131_EXT_RGMII_2NS_SKEW_TXDLL,
+ MII_KSZ9031_MOD_DATA_NO_POST_INC, tmp);
+ break;
+ }