1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * This file is based on code from OCTEON SDK by Cavium Networks.
4 *
5 * Copyright (c) 2003-2007 Cavium Networks
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/ethtool.h>
10 #include <linux/phy.h>
11 #include <linux/ratelimit.h>
12 #include <linux/of_mdio.h>
13 #include <generated/utsrelease.h>
14 #include <net/dst.h>
15
16 #include "octeon-ethernet.h"
17 #include "ethernet-defines.h"
18 #include "ethernet-mdio.h"
19 #include "ethernet-util.h"
20
cvm_oct_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)21 static void cvm_oct_get_drvinfo(struct net_device *dev,
22 struct ethtool_drvinfo *info)
23 {
24 strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
25 strscpy(info->version, UTS_RELEASE, sizeof(info->version));
26 strscpy(info->bus_info, "Builtin", sizeof(info->bus_info));
27 }
28
cvm_oct_nway_reset(struct net_device * dev)29 static int cvm_oct_nway_reset(struct net_device *dev)
30 {
31 if (!capable(CAP_NET_ADMIN))
32 return -EPERM;
33
34 if (dev->phydev)
35 return phy_start_aneg(dev->phydev);
36
37 return -EINVAL;
38 }
39
40 const struct ethtool_ops cvm_oct_ethtool_ops = {
41 .get_drvinfo = cvm_oct_get_drvinfo,
42 .nway_reset = cvm_oct_nway_reset,
43 .get_link = ethtool_op_get_link,
44 .get_link_ksettings = phy_ethtool_get_link_ksettings,
45 .set_link_ksettings = phy_ethtool_set_link_ksettings,
46 };
47
48 /**
49 * cvm_oct_ioctl - IOCTL support for PHY control
50 * @dev: Device to change
51 * @rq: the request
52 * @cmd: the command
53 *
54 * Returns Zero on success
55 */
cvm_oct_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)56 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
57 {
58 if (!netif_running(dev))
59 return -EINVAL;
60
61 if (!dev->phydev)
62 return -EINVAL;
63
64 return phy_mii_ioctl(dev->phydev, rq, cmd);
65 }
66
cvm_oct_note_carrier(struct octeon_ethernet * priv,union cvmx_helper_link_info li)67 void cvm_oct_note_carrier(struct octeon_ethernet *priv,
68 union cvmx_helper_link_info li)
69 {
70 if (li.s.link_up) {
71 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
72 netdev_name(priv->netdev), li.s.speed,
73 (li.s.full_duplex) ? "Full" : "Half",
74 priv->port, priv->queue);
75 } else {
76 pr_notice_ratelimited("%s: Link down\n",
77 netdev_name(priv->netdev));
78 }
79 }
80
cvm_oct_adjust_link(struct net_device * dev)81 void cvm_oct_adjust_link(struct net_device *dev)
82 {
83 struct octeon_ethernet *priv = netdev_priv(dev);
84 union cvmx_helper_link_info link_info;
85
86 link_info.u64 = 0;
87 link_info.s.link_up = dev->phydev->link ? 1 : 0;
88 link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
89 link_info.s.speed = dev->phydev->speed;
90 priv->link_info = link_info.u64;
91
92 /*
93 * The polling task need to know about link status changes.
94 */
95 if (priv->poll)
96 priv->poll(dev);
97
98 if (priv->last_link != dev->phydev->link) {
99 priv->last_link = dev->phydev->link;
100 cvmx_helper_link_set(priv->port, link_info);
101 cvm_oct_note_carrier(priv, link_info);
102 }
103 }
104
cvm_oct_common_stop(struct net_device * dev)105 int cvm_oct_common_stop(struct net_device *dev)
106 {
107 struct octeon_ethernet *priv = netdev_priv(dev);
108 int interface = INTERFACE(priv->port);
109 union cvmx_helper_link_info link_info;
110 union cvmx_gmxx_prtx_cfg gmx_cfg;
111 int index = INDEX(priv->port);
112
113 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
114 gmx_cfg.s.en = 0;
115 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
116
117 priv->poll = NULL;
118
119 if (dev->phydev)
120 phy_disconnect(dev->phydev);
121
122 if (priv->last_link) {
123 link_info.u64 = 0;
124 priv->last_link = 0;
125
126 cvmx_helper_link_set(priv->port, link_info);
127 cvm_oct_note_carrier(priv, link_info);
128 }
129 return 0;
130 }
131
132 /**
133 * cvm_oct_phy_setup_device - setup the PHY
134 *
135 * @dev: Device to setup
136 *
137 * Returns Zero on success, negative on failure
138 */
cvm_oct_phy_setup_device(struct net_device * dev)139 int cvm_oct_phy_setup_device(struct net_device *dev)
140 {
141 struct octeon_ethernet *priv = netdev_priv(dev);
142 struct device_node *phy_node;
143 struct phy_device *phydev = NULL;
144
145 if (!priv->of_node)
146 goto no_phy;
147
148 phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
149 if (!phy_node && of_phy_is_fixed_link(priv->of_node))
150 phy_node = of_node_get(priv->of_node);
151 if (!phy_node)
152 goto no_phy;
153
154 phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
155 priv->phy_mode);
156 of_node_put(phy_node);
157
158 if (!phydev)
159 return -EPROBE_DEFER;
160
161 priv->last_link = 0;
162 phy_start(phydev);
163
164 return 0;
165 no_phy:
166 /* If there is no phy, assume a direct MAC connection and that
167 * the link is up.
168 */
169 netif_carrier_on(dev);
170 return 0;
171 }
172