1 /*
2 * This file is based on code from OCTEON SDK by Cavium Networks.
3 *
4 * Copyright (c) 2003-2007 Cavium Networks
5 *
6 * This file is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, Version 2, as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/ethtool.h>
13 #include <linux/phy.h>
14 #include <linux/ratelimit.h>
15 #include <linux/of_mdio.h>
16 #include <generated/utsrelease.h>
17 #include <net/dst.h>
18
19 #include <asm/octeon/octeon.h>
20
21 #include "ethernet-defines.h"
22 #include "octeon-ethernet.h"
23 #include "ethernet-mdio.h"
24 #include "ethernet-util.h"
25
26 #include <asm/octeon/cvmx-gmxx-defs.h>
27 #include <asm/octeon/cvmx-smix-defs.h>
28
cvm_oct_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)29 static void cvm_oct_get_drvinfo(struct net_device *dev,
30 struct ethtool_drvinfo *info)
31 {
32 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
33 strlcpy(info->version, UTS_RELEASE, sizeof(info->version));
34 strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
35 }
36
cvm_oct_get_settings(struct net_device * dev,struct ethtool_cmd * cmd)37 static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
38 {
39 struct octeon_ethernet *priv = netdev_priv(dev);
40
41 if (priv->phydev)
42 return phy_ethtool_gset(priv->phydev, cmd);
43
44 return -EINVAL;
45 }
46
cvm_oct_set_settings(struct net_device * dev,struct ethtool_cmd * cmd)47 static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
48 {
49 struct octeon_ethernet *priv = netdev_priv(dev);
50
51 if (!capable(CAP_NET_ADMIN))
52 return -EPERM;
53
54 if (priv->phydev)
55 return phy_ethtool_sset(priv->phydev, cmd);
56
57 return -EINVAL;
58 }
59
cvm_oct_nway_reset(struct net_device * dev)60 static int cvm_oct_nway_reset(struct net_device *dev)
61 {
62 struct octeon_ethernet *priv = netdev_priv(dev);
63
64 if (!capable(CAP_NET_ADMIN))
65 return -EPERM;
66
67 if (priv->phydev)
68 return phy_start_aneg(priv->phydev);
69
70 return -EINVAL;
71 }
72
73 const struct ethtool_ops cvm_oct_ethtool_ops = {
74 .get_drvinfo = cvm_oct_get_drvinfo,
75 .get_settings = cvm_oct_get_settings,
76 .set_settings = cvm_oct_set_settings,
77 .nway_reset = cvm_oct_nway_reset,
78 .get_link = ethtool_op_get_link,
79 };
80
81 /**
82 * cvm_oct_ioctl - IOCTL support for PHY control
83 * @dev: Device to change
84 * @rq: the request
85 * @cmd: the command
86 *
87 * Returns Zero on success
88 */
cvm_oct_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)89 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
90 {
91 struct octeon_ethernet *priv = netdev_priv(dev);
92
93 if (!netif_running(dev))
94 return -EINVAL;
95
96 if (!priv->phydev)
97 return -EINVAL;
98
99 return phy_mii_ioctl(priv->phydev, rq, cmd);
100 }
101
cvm_oct_note_carrier(struct octeon_ethernet * priv,cvmx_helper_link_info_t li)102 void cvm_oct_note_carrier(struct octeon_ethernet *priv,
103 cvmx_helper_link_info_t li)
104 {
105 if (li.s.link_up) {
106 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
107 netdev_name(priv->netdev), li.s.speed,
108 (li.s.full_duplex) ? "Full" : "Half",
109 priv->port, priv->queue);
110 } else {
111 pr_notice_ratelimited("%s: Link down\n",
112 netdev_name(priv->netdev));
113 }
114 }
115
cvm_oct_adjust_link(struct net_device * dev)116 void cvm_oct_adjust_link(struct net_device *dev)
117 {
118 struct octeon_ethernet *priv = netdev_priv(dev);
119 cvmx_helper_link_info_t link_info;
120
121 if (priv->last_link != priv->phydev->link) {
122 priv->last_link = priv->phydev->link;
123 link_info.u64 = 0;
124 link_info.s.link_up = priv->last_link ? 1 : 0;
125 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
126 link_info.s.speed = priv->phydev->speed;
127
128 cvmx_helper_link_set(priv->port, link_info);
129 cvm_oct_note_carrier(priv, link_info);
130 }
131 }
132
cvm_oct_common_stop(struct net_device * dev)133 int cvm_oct_common_stop(struct net_device *dev)
134 {
135 struct octeon_ethernet *priv = netdev_priv(dev);
136 int interface = INTERFACE(priv->port);
137 cvmx_helper_link_info_t link_info;
138 union cvmx_gmxx_prtx_cfg gmx_cfg;
139 int index = INDEX(priv->port);
140
141 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
142 gmx_cfg.s.en = 0;
143 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
144
145 priv->poll = NULL;
146
147 if (priv->phydev)
148 phy_disconnect(priv->phydev);
149 priv->phydev = NULL;
150
151 if (priv->last_link) {
152 link_info.u64 = 0;
153 priv->last_link = 0;
154
155 cvmx_helper_link_set(priv->port, link_info);
156 cvm_oct_note_carrier(priv, link_info);
157 }
158 return 0;
159 }
160
161 /**
162 * cvm_oct_phy_setup_device - setup the PHY
163 *
164 * @dev: Device to setup
165 *
166 * Returns Zero on success, negative on failure
167 */
cvm_oct_phy_setup_device(struct net_device * dev)168 int cvm_oct_phy_setup_device(struct net_device *dev)
169 {
170 struct octeon_ethernet *priv = netdev_priv(dev);
171 struct device_node *phy_node;
172
173 if (!priv->of_node)
174 goto no_phy;
175
176 phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
177 if (!phy_node)
178 goto no_phy;
179
180 priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
181 PHY_INTERFACE_MODE_GMII);
182
183 if (priv->phydev == NULL)
184 return -ENODEV;
185
186 priv->last_link = 0;
187 phy_start_aneg(priv->phydev);
188
189 return 0;
190 no_phy:
191 /* If there is no phy, assume a direct MAC connection and that
192 * the link is up.
193 */
194 netif_carrier_on(dev);
195 return 0;
196 }
197