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a2443fd1 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f61687c0 SX |
2 | /* |
3 | * Driver for Teranetics PHY | |
4 | * | |
5 | * Author: Shaohui Xie <Shaohui.Xie@freescale.com> | |
6 | * | |
7 | * Copyright 2015 Freescale Semiconductor, Inc. | |
f61687c0 SX |
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 | ||
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34 | static int teranetics_aneg_done(struct phy_device *phydev) |
35 | { | |
94724d10 SX |
36 | /* auto negotiation state can only be checked when using copper |
37 | * port, if using fiber port, just lie it's done. | |
38 | */ | |
aebc78a4 FF |
39 | if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) |
40 | return genphy_c45_aneg_done(phydev); | |
94724d10 SX |
41 | |
42 | return 1; | |
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43 | } |
44 | ||
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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, 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", | |
40f89ebf | 80 | .features = PHY_10GBIT_FEATURES, |
f61687c0 | 81 | .aneg_done = teranetics_aneg_done, |
aebc78a4 | 82 | .config_aneg = gen10g_config_aneg, |
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83 | .read_status = teranetics_read_status, |
84 | .match_phy_device = teranetics_match_phy_device, | |
f61687c0 SX |
85 | }, |
86 | }; | |
87 | ||
fb0801dc | 88 | module_phy_driver(teranetics_driver); |
f61687c0 SX |
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); |