cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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teranetics.c (2354B)

      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
     17MODULE_DESCRIPTION("Teranetics PHY driver");
     18MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
     19MODULE_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
     34static 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
     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);