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 37 static int teranetics_aneg_done(struct phy_device *phydev) 38 { 39 /* auto negotiation state can only be checked when using copper 40 * port, if using fiber port, just lie it's done. 41 */ 42 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) 43 return genphy_c45_aneg_done(phydev); 44 45 return 1; 46 } 47 48 static int teranetics_read_status(struct phy_device *phydev) 49 { 50 int reg; 51 52 phydev->link = 1; 53 54 phydev->speed = SPEED_10000; 55 phydev->duplex = DUPLEX_FULL; 56 57 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) { 58 reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT); 59 if (reg < 0 || 60 !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) { 61 phydev->link = 0; 62 return 0; 63 } 64 65 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1); 66 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) 67 phydev->link = 0; 68 } 69 70 return 0; 71 } 72 73 static int teranetics_match_phy_device(struct phy_device *phydev) 74 { 75 return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020; 76 } 77 78 static struct phy_driver teranetics_driver[] = { 79 { 80 .phy_id = PHY_ID_TN2020, 81 .phy_id_mask = 0xffffffff, 82 .name = "Teranetics TN2020", 83 .features = PHY_10GBIT_FEATURES, 84 .soft_reset = gen10g_no_soft_reset, 85 .aneg_done = teranetics_aneg_done, 86 .config_init = gen10g_config_init, 87 .config_aneg = gen10g_config_aneg, 88 .read_status = teranetics_read_status, 89 .match_phy_device = teranetics_match_phy_device, 90 }, 91 }; 92 93 module_phy_driver(teranetics_driver); 94 95 static struct mdio_device_id __maybe_unused teranetics_tbl[] = { 96 { PHY_ID_TN2020, 0xffffffff }, 97 { } 98 }; 99 100 MODULE_DEVICE_TABLE(mdio, teranetics_tbl); 101