2 * Teranetics PHY drivers
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * Copyright 2010-2011 Freescale Semiconductor, Inc.
27 #ifndef CONFIG_PHYLIB_10G
28 #error The Teranetics PHY needs 10G support
31 int tn2020_config(struct phy_device *phydev)
33 if (phydev->port == PORT_FIBRE) {
34 unsigned short restart_an = (MDIO_AN_CTRL1_RESTART |
35 MDIO_AN_CTRL1_ENABLE |
40 * bit 15:12 of register 30.32 indicates PHY hardware
41 * version. It can be used to distinguish TN80xx from
42 * TN2020. TN2020 needs write 0x2 to 30.93, but TN80xx
45 phy_hwversion = (phy_read(phydev, 30, 32) >> 12) & 0xf;
46 if (phy_hwversion <= 3) {
47 phy_write(phydev, 30, 93, 2);
48 phy_write(phydev, MDIO_MMD_AN, MDIO_CTRL1, restart_an);
50 phy_write(phydev, 30, 93, 1);
57 int tn2020_startup(struct phy_device *phydev)
59 unsigned int timeout = 5 * 1000; /* 5 second timeout */
61 #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
62 MDIO_PHYXS_LNSTAT_SYNC1 | \
63 MDIO_PHYXS_LNSTAT_SYNC2 | \
64 MDIO_PHYXS_LNSTAT_SYNC3 | \
65 MDIO_PHYXS_LNSTAT_ALIGN)
68 * Wait for the XAUI-SERDES lanes to align first. Under normal
69 * circumstances, this can take up to three seconds.
72 int reg = phy_read(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
74 printf("TN2020: Error reading from PHY at "
75 "address %u\n", phydev->addr);
78 if ((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)
84 * A timeout is bad, but it may not be fatal, so don't
85 * return an error. Display a warning instead.
87 printf("TN2020: Timeout waiting for PHY at address %u to "
88 "align.\n", phydev->addr);
91 if (phydev->port != PORT_FIBRE)
92 return gen10g_startup(phydev);
95 * The TN2020 only pretends to support fiber.
96 * It works, but it doesn't look like it works,
97 * so the link status reports no link.
101 /* For now just lie and say it's 10G all the time */
102 phydev->speed = SPEED_10000;
103 phydev->duplex = DUPLEX_FULL;
108 struct phy_driver tn2020_driver = {
109 .name = "Teranetics TN2020",
110 .uid = PHY_UID_TN2020,
112 .features = PHY_10G_FEATURES,
113 .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
114 MDIO_DEVS_PHYXS | MDIO_DEVS_AN |
115 MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2),
116 .config = &tn2020_config,
117 .startup = &tn2020_startup,
118 .shutdown = &gen10g_shutdown,
121 int phy_teranetics_init(void)
123 phy_register(&tn2020_driver);