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_nway_reset(struct net_device * dev)37 static int cvm_oct_nway_reset(struct net_device *dev)
38 {
39 if (!capable(CAP_NET_ADMIN))
40 return -EPERM;
41
42 if (dev->phydev)
43 return phy_start_aneg(dev->phydev);
44
45 return -EINVAL;
46 }
47
48 const struct ethtool_ops cvm_oct_ethtool_ops = {
49 .get_drvinfo = cvm_oct_get_drvinfo,
50 .nway_reset = cvm_oct_nway_reset,
51 .get_link = ethtool_op_get_link,
52 .get_link_ksettings = phy_ethtool_get_link_ksettings,
53 .set_link_ksettings = phy_ethtool_set_link_ksettings,
54 };
55
56 /**
57 * cvm_oct_ioctl - IOCTL support for PHY control
58 * @dev: Device to change
59 * @rq: the request
60 * @cmd: the command
61 *
62 * Returns Zero on success
63 */
cvm_oct_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)64 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
65 {
66 if (!netif_running(dev))
67 return -EINVAL;
68
69 if (!dev->phydev)
70 return -EINVAL;
71
72 return phy_mii_ioctl(dev->phydev, rq, cmd);
73 }
74
cvm_oct_note_carrier(struct octeon_ethernet * priv,cvmx_helper_link_info_t li)75 void cvm_oct_note_carrier(struct octeon_ethernet *priv,
76 cvmx_helper_link_info_t li)
77 {
78 if (li.s.link_up) {
79 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
80 netdev_name(priv->netdev), li.s.speed,
81 (li.s.full_duplex) ? "Full" : "Half",
82 priv->port, priv->queue);
83 } else {
84 pr_notice_ratelimited("%s: Link down\n",
85 netdev_name(priv->netdev));
86 }
87 }
88
cvm_oct_adjust_link(struct net_device * dev)89 void cvm_oct_adjust_link(struct net_device *dev)
90 {
91 struct octeon_ethernet *priv = netdev_priv(dev);
92 cvmx_helper_link_info_t link_info;
93
94 link_info.u64 = 0;
95 link_info.s.link_up = dev->phydev->link ? 1 : 0;
96 link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
97 link_info.s.speed = dev->phydev->speed;
98 priv->link_info = link_info.u64;
99
100 /*
101 * The polling task need to know about link status changes.
102 */
103 if (priv->poll)
104 priv->poll(dev);
105
106 if (priv->last_link != dev->phydev->link) {
107 priv->last_link = dev->phydev->link;
108 cvmx_helper_link_set(priv->port, link_info);
109 cvm_oct_note_carrier(priv, link_info);
110 }
111 }
112
cvm_oct_common_stop(struct net_device * dev)113 int cvm_oct_common_stop(struct net_device *dev)
114 {
115 struct octeon_ethernet *priv = netdev_priv(dev);
116 int interface = INTERFACE(priv->port);
117 cvmx_helper_link_info_t link_info;
118 union cvmx_gmxx_prtx_cfg gmx_cfg;
119 int index = INDEX(priv->port);
120
121 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
122 gmx_cfg.s.en = 0;
123 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
124
125 priv->poll = NULL;
126
127 if (dev->phydev)
128 phy_disconnect(dev->phydev);
129
130 if (priv->last_link) {
131 link_info.u64 = 0;
132 priv->last_link = 0;
133
134 cvmx_helper_link_set(priv->port, link_info);
135 cvm_oct_note_carrier(priv, link_info);
136 }
137 return 0;
138 }
139
140 /**
141 * cvm_oct_phy_setup_device - setup the PHY
142 *
143 * @dev: Device to setup
144 *
145 * Returns Zero on success, negative on failure
146 */
cvm_oct_phy_setup_device(struct net_device * dev)147 int cvm_oct_phy_setup_device(struct net_device *dev)
148 {
149 struct octeon_ethernet *priv = netdev_priv(dev);
150 struct device_node *phy_node;
151 struct phy_device *phydev = NULL;
152
153 if (!priv->of_node)
154 goto no_phy;
155
156 phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
157 if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
158 int rc;
159
160 rc = of_phy_register_fixed_link(priv->of_node);
161 if (rc)
162 return rc;
163
164 phy_node = of_node_get(priv->of_node);
165 }
166 if (!phy_node)
167 goto no_phy;
168
169 phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
170 PHY_INTERFACE_MODE_GMII);
171 of_node_put(phy_node);
172
173 if (!phydev)
174 return -ENODEV;
175
176 priv->last_link = 0;
177 phy_start_aneg(phydev);
178
179 return 0;
180 no_phy:
181 /* If there is no phy, assume a direct MAC connection and that
182 * the link is up.
183 */
184 netif_carrier_on(dev);
185 return 0;
186 }
187