1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for Teranetics PHY
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright 2015 Freescale Semiconductor, Inc.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/mii.h>
13*4882a593Smuzhiyun #include <linux/ethtool.h>
14*4882a593Smuzhiyun #include <linux/mdio.h>
15*4882a593Smuzhiyun #include <linux/phy.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun MODULE_DESCRIPTION("Teranetics PHY driver");
18*4882a593Smuzhiyun MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
19*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define PHY_ID_TN2020 0x00a19410
22*4882a593Smuzhiyun #define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
23*4882a593Smuzhiyun #define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
24*4882a593Smuzhiyun #define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
25*4882a593Smuzhiyun #define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
26*4882a593Smuzhiyun #define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
29*4882a593Smuzhiyun MDIO_PHYXS_LNSTAT_SYNC1 | \
30*4882a593Smuzhiyun MDIO_PHYXS_LNSTAT_SYNC2 | \
31*4882a593Smuzhiyun MDIO_PHYXS_LNSTAT_SYNC3 | \
32*4882a593Smuzhiyun MDIO_PHYXS_LNSTAT_ALIGN)
33*4882a593Smuzhiyun
teranetics_aneg_done(struct phy_device * phydev)34*4882a593Smuzhiyun static int teranetics_aneg_done(struct phy_device *phydev)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun /* auto negotiation state can only be checked when using copper
37*4882a593Smuzhiyun * port, if using fiber port, just lie it's done.
38*4882a593Smuzhiyun */
39*4882a593Smuzhiyun if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93))
40*4882a593Smuzhiyun return genphy_c45_aneg_done(phydev);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return 1;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
teranetics_read_status(struct phy_device * phydev)45*4882a593Smuzhiyun static int teranetics_read_status(struct phy_device *phydev)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun int reg;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun phydev->link = 1;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun phydev->speed = SPEED_10000;
52*4882a593Smuzhiyun phydev->duplex = DUPLEX_FULL;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
55*4882a593Smuzhiyun reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
56*4882a593Smuzhiyun if (reg < 0 ||
57*4882a593Smuzhiyun !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
58*4882a593Smuzhiyun phydev->link = 0;
59*4882a593Smuzhiyun return 0;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
63*4882a593Smuzhiyun if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
64*4882a593Smuzhiyun phydev->link = 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun return 0;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
teranetics_match_phy_device(struct phy_device * phydev)70*4882a593Smuzhiyun static int teranetics_match_phy_device(struct phy_device *phydev)
71*4882a593Smuzhiyun {
72*4882a593Smuzhiyun return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static struct phy_driver teranetics_driver[] = {
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun .phy_id = PHY_ID_TN2020,
78*4882a593Smuzhiyun .phy_id_mask = 0xffffffff,
79*4882a593Smuzhiyun .name = "Teranetics TN2020",
80*4882a593Smuzhiyun .features = PHY_10GBIT_FEATURES,
81*4882a593Smuzhiyun .aneg_done = teranetics_aneg_done,
82*4882a593Smuzhiyun .config_aneg = gen10g_config_aneg,
83*4882a593Smuzhiyun .read_status = teranetics_read_status,
84*4882a593Smuzhiyun .match_phy_device = teranetics_match_phy_device,
85*4882a593Smuzhiyun },
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun module_phy_driver(teranetics_driver);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
91*4882a593Smuzhiyun { PHY_ID_TN2020, 0xffffffff },
92*4882a593Smuzhiyun { }
93*4882a593Smuzhiyun };
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun MODULE_DEVICE_TABLE(mdio, teranetics_tbl);
96