1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Generic PHY Management code 4 * 5 * Copyright 2011 Freescale Semiconductor, Inc. 6 * author Andy Fleming 7 * 8 * Based loosely off of Linux's PHY Lib 9 */ 10 11 #include <config.h> 12 #include <common.h> 13 #include <miiphy.h> 14 #include <phy.h> 15 16 int gen10g_shutdown(struct phy_device *phydev) 17 { 18 return 0; 19 } 20 21 int gen10g_startup(struct phy_device *phydev) 22 { 23 int devad, reg; 24 u32 mmd_mask = phydev->mmds & MDIO_DEVS_LINK; 25 26 phydev->link = 1; 27 28 /* For now just lie and say it's 10G all the time */ 29 phydev->speed = SPEED_10000; 30 phydev->duplex = DUPLEX_FULL; 31 32 /* 33 * Go through all the link-reporting devices, and make sure 34 * they're all up and happy 35 */ 36 for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { 37 if (!(mmd_mask & 1)) 38 continue; 39 40 /* Read twice because link state is latched and a 41 * read moves the current state into the register */ 42 phy_read(phydev, devad, MDIO_STAT1); 43 reg = phy_read(phydev, devad, MDIO_STAT1); 44 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) 45 phydev->link = 0; 46 } 47 48 return 0; 49 } 50 51 int gen10g_discover_mmds(struct phy_device *phydev) 52 { 53 int mmd, stat2, devs1, devs2; 54 55 /* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY 56 * XS or DTE XS; give up if none is present. */ 57 for (mmd = 1; mmd <= 5; mmd++) { 58 /* Is this MMD present? */ 59 stat2 = phy_read(phydev, mmd, MDIO_STAT2); 60 if (stat2 < 0 || 61 (stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL) 62 continue; 63 64 /* It should tell us about all the other MMDs */ 65 devs1 = phy_read(phydev, mmd, MDIO_DEVS1); 66 devs2 = phy_read(phydev, mmd, MDIO_DEVS2); 67 if (devs1 < 0 || devs2 < 0) 68 continue; 69 70 phydev->mmds = devs1 | (devs2 << 16); 71 return 0; 72 } 73 74 return 0; 75 } 76 77 int gen10g_config(struct phy_device *phydev) 78 { 79 /* For now, assume 10000baseT. Fill in later */ 80 phydev->supported = phydev->advertising = SUPPORTED_10000baseT_Full; 81 82 return gen10g_discover_mmds(phydev); 83 } 84 85 struct phy_driver gen10g_driver = { 86 .uid = 0xffffffff, 87 .mask = 0xffffffff, 88 .name = "Generic 10G PHY", 89 .features = 0, 90 .config = gen10g_config, 91 .startup = gen10g_startup, 92 .shutdown = gen10g_shutdown, 93 }; 94
