tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Driver for Teranetics PHY
3 *
4 * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
5 *
6 * Copyright 2015 Freescale Semiconductor, Inc.
7 *
8 * This file is licensed under the terms of the GNU General Public License
9 * version 2. This program is licensed "as is" without any warranty of any
10 * kind, whether express or implied.
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/mii.h>
16#include <linux/ethtool.h>
17#include <linux/mdio.h>
18#include <linux/phy.h>
19
20MODULE_DESCRIPTION("Teranetics PHY driver");
21MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
22MODULE_LICENSE("GPL v2");
23
24#define PHY_ID_TN2020 0x00a19410
25#define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
26#define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
27#define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
28#define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
29#define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
30
31#define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
32 MDIO_PHYXS_LNSTAT_SYNC1 | \
33 MDIO_PHYXS_LNSTAT_SYNC2 | \
34 MDIO_PHYXS_LNSTAT_SYNC3 | \
35 MDIO_PHYXS_LNSTAT_ALIGN)
36
37static int teranetics_config_init(struct phy_device *phydev)
38{
39 phydev->supported = SUPPORTED_10000baseT_Full;
40 phydev->advertising = SUPPORTED_10000baseT_Full;
41
42 return 0;
43}
44
45static int teranetics_soft_reset(struct phy_device *phydev)
46{
47 return 0;
48}
49
50static int teranetics_aneg_done(struct phy_device *phydev)
51{
52 int reg;
53
54 /* auto negotiation state can only be checked when using copper
55 * port, if using fiber port, just lie it's done.
56 */
57 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
58 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
59 return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
60 }
61
62 return 1;
63}
64
65static int teranetics_config_aneg(struct phy_device *phydev)
66{
67 return 0;
68}
69
70static int teranetics_read_status(struct phy_device *phydev)
71{
72 int reg;
73
74 phydev->link = 1;
75
76 phydev->speed = SPEED_10000;
77 phydev->duplex = DUPLEX_FULL;
78
79 if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
80 reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
81 if (reg < 0 ||
82 !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
83 phydev->link = 0;
84 return 0;
85 }
86
87 reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
88 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
89 phydev->link = 0;
90 }
91
92 return 0;
93}
94
95static int teranetics_match_phy_device(struct phy_device *phydev)
96{
97 return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
98}
99
100static struct phy_driver teranetics_driver[] = {
101{
102 .phy_id = PHY_ID_TN2020,
103 .phy_id_mask = 0xffffffff,
104 .name = "Teranetics TN2020",
105 .soft_reset = teranetics_soft_reset,
106 .aneg_done = teranetics_aneg_done,
107 .config_init = teranetics_config_init,
108 .config_aneg = teranetics_config_aneg,
109 .read_status = teranetics_read_status,
110 .match_phy_device = teranetics_match_phy_device,
111},
112};
113
114module_phy_driver(teranetics_driver);
115
116static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
117 { PHY_ID_TN2020, 0xffffffff },
118 { }
119};
120
121MODULE_DEVICE_TABLE(mdio, teranetics_tbl);