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1// SPDX-License-Identifier: GPL-2.02/*3 * Driver for Teranetics PHY4 *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 17MODULE_DESCRIPTION("Teranetics PHY driver");18MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");19MODULE_LICENSE("GPL v2");20 21#define PHY_ID_TN2020 0x00a1941022#define MDIO_PHYXS_LNSTAT_SYNC0 0x000123#define MDIO_PHYXS_LNSTAT_SYNC1 0x000224#define MDIO_PHYXS_LNSTAT_SYNC2 0x000425#define MDIO_PHYXS_LNSTAT_SYNC3 0x000826#define MDIO_PHYXS_LNSTAT_ALIGN 0x100027 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 34static int teranetics_aneg_done(struct phy_device *phydev)35{36 /* auto negotiation state can only be checked when using copper37 * 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 45static 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 70static int teranetics_match_phy_device(struct phy_device *phydev)71{72 return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;73}74 75static 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 88module_phy_driver(teranetics_driver);89 90static struct mdio_device_id __maybe_unused teranetics_tbl[] = {91 { PHY_ID_TN2020, 0xffffffff },92 { }93};94 95MODULE_DEVICE_TABLE(mdio, teranetics_tbl);96