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 | |
17 | MODULE_DESCRIPTION("Teranetics PHY driver" ); |
18 | MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>" ); |
19 | MODULE_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 | |
34 | static 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, regnum: 93)) |
40 | return genphy_c45_aneg_done(phydev); |
41 | |
42 | return 1; |
43 | } |
44 | |
45 | static 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, regnum: 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 | |
70 | static int teranetics_match_phy_device(struct phy_device *phydev) |
71 | { |
72 | return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020; |
73 | } |
74 | |
75 | static 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 | |
88 | module_phy_driver(teranetics_driver); |
89 | |
90 | static struct mdio_device_id __maybe_unused teranetics_tbl[] = { |
91 | { PHY_ID_TN2020, 0xffffffff }, |
92 | { } |
93 | }; |
94 | |
95 | MODULE_DEVICE_TABLE(mdio, teranetics_tbl); |
96 | |