1 /* 2 * Driver for Teranetics PHY 3 * 4 * Author: Shaohui Xie <Shaohui.Xie@freescale.com> 5 * 6 * Copyright 2015 Freescale Semiconductor, Inc. 7 * 8 * This file is licensed under the terms of the GNU General Public License 9 * version 2. This program is licensed "as is" without any warranty of any 10 * kind, whether express or implied. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/mii.h> 16 #include <linux/ethtool.h> 17 #include <linux/mdio.h> 18 #include <linux/phy.h> 19 20 MODULE_DESCRIPTION("Teranetics PHY driver"); 21 MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>"); 22 MODULE_LICENSE("GPL v2"); 23 24 #define PHY_ID_TN2020 0x00a19410 25 #define MDIO_PHYXS_LNSTAT_SYNC0 0x0001 26 #define MDIO_PHYXS_LNSTAT_SYNC1 0x0002 27 #define MDIO_PHYXS_LNSTAT_SYNC2 0x0004 28 #define MDIO_PHYXS_LNSTAT_SYNC3 0x0008 29 #define MDIO_PHYXS_LNSTAT_ALIGN 0x1000 30 31 #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \ 32 MDIO_PHYXS_LNSTAT_SYNC1 | \ 33 MDIO_PHYXS_LNSTAT_SYNC2 | \ 34 MDIO_PHYXS_LNSTAT_SYNC3 | \ 35 MDIO_PHYXS_LNSTAT_ALIGN) 36 teranetics_config_init(struct phy_device * phydev)37 static int teranetics_config_init(struct phy_device *phydev) 38 { 39 phydev->supported = SUPPORTED_10000baseT_Full; 40 phydev->advertising = SUPPORTED_10000baseT_Full; 41 42 return 0; 43 } 44 teranetics_soft_reset(struct phy_device * phydev)45 static int teranetics_soft_reset(struct phy_device *phydev) 46 { 47 return 0; 48 } 49 teranetics_aneg_done(struct phy_device * phydev)50 static int teranetics_aneg_done(struct phy_device *phydev) 51 { 52 int reg; 53 54 /* auto negotiation state can only be checked when using copper 55 * port, if using fiber port, just lie it's done. 56 */ 57 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) { 58 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1); 59 return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE); 60 } 61 62 return 1; 63 } 64 teranetics_config_aneg(struct phy_device * phydev)65 static int teranetics_config_aneg(struct phy_device *phydev) 66 { 67 return 0; 68 } 69 teranetics_read_status(struct phy_device * phydev)70 static int teranetics_read_status(struct phy_device *phydev) 71 { 72 int reg; 73 74 phydev->link = 1; 75 76 phydev->speed = SPEED_10000; 77 phydev->duplex = DUPLEX_FULL; 78 79 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) { 80 reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT); 81 if (reg < 0 || 82 !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) { 83 phydev->link = 0; 84 return 0; 85 } 86 87 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1); 88 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) 89 phydev->link = 0; 90 } 91 92 return 0; 93 } 94 teranetics_match_phy_device(struct phy_device * phydev)95 static int teranetics_match_phy_device(struct phy_device *phydev) 96 { 97 return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020; 98 } 99 100 static struct phy_driver teranetics_driver[] = { 101 { 102 .phy_id = PHY_ID_TN2020, 103 .phy_id_mask = 0xffffffff, 104 .name = "Teranetics TN2020", 105 .soft_reset = teranetics_soft_reset, 106 .aneg_done = teranetics_aneg_done, 107 .config_init = teranetics_config_init, 108 .config_aneg = teranetics_config_aneg, 109 .read_status = teranetics_read_status, 110 .match_phy_device = teranetics_match_phy_device, 111 }, 112 }; 113 114 module_phy_driver(teranetics_driver); 115 116 static struct mdio_device_id __maybe_unused teranetics_tbl[] = { 117 { PHY_ID_TN2020, 0xffffffff }, 118 { } 119 }; 120 121 MODULE_DEVICE_TABLE(mdio, teranetics_tbl); 122