1 /* 2 * Teranetics PHY drivers 3 * 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. 8 * 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. 13 * 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, 17 * MA 02111-1307 USA 18 * 19 * Copyright 2010-2011 Freescale Semiconductor, Inc. 20 * author Andy Fleming 21 * 22 */ 23 #include <config.h> 24 #include <common.h> 25 #include <phy.h> 26 27 #ifndef CONFIG_PHYLIB_10G 28 #error The Teranetics PHY needs 10G support 29 #endif 30 31 int tn2020_config(struct phy_device *phydev) 32 { 33 if (phydev->port == PORT_FIBRE) { 34 unsigned short restart_an = (MDIO_AN_CTRL1_RESTART | 35 MDIO_AN_CTRL1_ENABLE | 36 MDIO_AN_CTRL1_XNP); 37 38 phy_write(phydev, 30, 93, 2); 39 phy_write(phydev, MDIO_MMD_AN, MDIO_CTRL1, restart_an); 40 } 41 42 return 0; 43 } 44 45 int tn2020_startup(struct phy_device *phydev) 46 { 47 unsigned int timeout = 5 * 1000; /* 5 second timeout */ 48 49 #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \ 50 MDIO_PHYXS_LNSTAT_SYNC1 | \ 51 MDIO_PHYXS_LNSTAT_SYNC2 | \ 52 MDIO_PHYXS_LNSTAT_SYNC3 | \ 53 MDIO_PHYXS_LNSTAT_ALIGN) 54 55 /* 56 * Wait for the XAUI-SERDES lanes to align first. Under normal 57 * circumstances, this can take up to three seconds. 58 */ 59 while (--timeout) { 60 int reg = phy_read(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT); 61 if (reg < 0) { 62 printf("TN2020: Error reading from PHY at " 63 "address %u\n", phydev->addr); 64 break; 65 } 66 if ((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY) 67 break; 68 udelay(1000); 69 } 70 if (!timeout) { 71 /* 72 * A timeout is bad, but it may not be fatal, so don't 73 * return an error. Display a warning instead. 74 */ 75 printf("TN2020: Timeout waiting for PHY at address %u to " 76 "align.\n", phydev->addr); 77 } 78 79 if (phydev->port != PORT_FIBRE) 80 return gen10g_startup(phydev); 81 82 /* 83 * The TN2020 only pretends to support fiber. 84 * It works, but it doesn't look like it works, 85 * so the link status reports no link. 86 */ 87 phydev->link = 1; 88 89 /* For now just lie and say it's 10G all the time */ 90 phydev->speed = SPEED_10000; 91 phydev->duplex = DUPLEX_FULL; 92 93 return 0; 94 } 95 96 struct phy_driver tn2020_driver = { 97 .name = "Teranetics TN2020", 98 .uid = PHY_UID_TN2020, 99 .mask = 0xfffffff0, 100 .features = PHY_10G_FEATURES, 101 .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS | 102 MDIO_DEVS_PHYXS | MDIO_DEVS_AN | 103 MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2), 104 .config = &tn2020_config, 105 .startup = &tn2020_startup, 106 .shutdown = &gen10g_shutdown, 107 }; 108 109 int phy_teranetics_init(void) 110 { 111 phy_register(&tn2020_driver); 112 113 return 0; 114 } 115