1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for Teranetics PHY 4 * 5 * Author: Shaohui Xie <Shaohui.Xie@freescale.com> 6 * 7 * Copyright 2015 Freescale Semiconductor, Inc. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/mii.h> 13 #include <linux/ethtool.h> 14 #include <linux/mdio.h> 15 #include <linux/phy.h> 16 17 MODULE_DESCRIPTION("Teranetics PHY driver"); 18 MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>"); 19 MODULE_LICENSE("GPL v2"); 20 21 #define PHY_ID_TN2020 0x00a19410 22 #define MDIO_PHYXS_LNSTAT_SYNC0 0x0001 23 #define MDIO_PHYXS_LNSTAT_SYNC1 0x0002 24 #define MDIO_PHYXS_LNSTAT_SYNC2 0x0004 25 #define MDIO_PHYXS_LNSTAT_SYNC3 0x0008 26 #define MDIO_PHYXS_LNSTAT_ALIGN 0x1000 27 28 #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \ 29 MDIO_PHYXS_LNSTAT_SYNC1 | \ 30 MDIO_PHYXS_LNSTAT_SYNC2 | \ 31 MDIO_PHYXS_LNSTAT_SYNC3 | \ 32 MDIO_PHYXS_LNSTAT_ALIGN) 33 34 static int teranetics_aneg_done(struct phy_device *phydev) 35 { 36 /* auto negotiation state can only be checked when using copper 37 * port, if using fiber port, just lie it's done. 38 */ 39 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) 40 return genphy_c45_aneg_done(phydev); 41 42 return 1; 43 } 44 45 static int teranetics_read_status(struct phy_device *phydev) 46 { 47 int reg; 48 49 phydev->link = 1; 50 51 phydev->speed = SPEED_10000; 52 phydev->duplex = DUPLEX_FULL; 53 54 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) { 55 reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT); 56 if (reg < 0 || 57 !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) { 58 phydev->link = 0; 59 return 0; 60 } 61 62 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1); 63 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) 64 phydev->link = 0; 65 } 66 67 return 0; 68 } 69 70 static int teranetics_match_phy_device(struct phy_device *phydev) 71 { 72 return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020; 73 } 74 75 static struct phy_driver teranetics_driver[] = { 76 { 77 .phy_id = PHY_ID_TN2020, 78 .phy_id_mask = 0xffffffff, 79 .name = "Teranetics TN2020", 80 .features = PHY_10GBIT_FEATURES, 81 .aneg_done = teranetics_aneg_done, 82 .config_aneg = gen10g_config_aneg, 83 .read_status = teranetics_read_status, 84 .match_phy_device = teranetics_match_phy_device, 85 }, 86 }; 87 88 module_phy_driver(teranetics_driver); 89 90 static struct mdio_device_id __maybe_unused teranetics_tbl[] = { 91 { PHY_ID_TN2020, 0xffffffff }, 92 { } 93 }; 94 95 MODULE_DEVICE_TABLE(mdio, teranetics_tbl); 96