Merge tag 'pci-v5.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
[linux-2.6-microblaze.git] / drivers / net / phy / teranetics.c
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, 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, 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);