1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for Teranetics PHY
5 * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
7 * Copyright 2015 Freescale Semiconductor, Inc.
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>
17 MODULE_DESCRIPTION("Teranetics PHY driver");
18 MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
19 MODULE_LICENSE("GPL v2");
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
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)
34 static int teranetics_aneg_done(struct phy_device
*phydev
)
36 /* auto negotiation state can only be checked when using copper
37 * port, if using fiber port, just lie it's done.
39 if (!phy_read_mmd(phydev
, MDIO_MMD_VEND1
, 93))
40 return genphy_c45_aneg_done(phydev
);
45 static int teranetics_read_status(struct phy_device
*phydev
)
51 phydev
->speed
= SPEED_10000
;
52 phydev
->duplex
= DUPLEX_FULL
;
54 if (!phy_read_mmd(phydev
, MDIO_MMD_VEND1
, 93)) {
55 reg
= phy_read_mmd(phydev
, MDIO_MMD_PHYXS
, MDIO_PHYXS_LNSTAT
);
57 !((reg
& MDIO_PHYXS_LANE_READY
) == MDIO_PHYXS_LANE_READY
)) {
62 reg
= phy_read_mmd(phydev
, MDIO_MMD_AN
, MDIO_STAT1
);
63 if (reg
< 0 || !(reg
& MDIO_STAT1_LSTATUS
))
70 static int teranetics_match_phy_device(struct phy_device
*phydev
)
72 return phydev
->c45_ids
.device_ids
[3] == PHY_ID_TN2020
;
75 static struct phy_driver teranetics_driver
[] = {
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
,
88 module_phy_driver(teranetics_driver
);
90 static struct mdio_device_id __maybe_unused teranetics_tbl
[] = {
91 { PHY_ID_TN2020
, 0xffffffff },
95 MODULE_DEVICE_TABLE(mdio
, teranetics_tbl
);