1/**********************************************************************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2007 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT.  See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26**********************************************************************/
27#include <linux/kernel.h>
28#include <linux/ethtool.h>
29#include <linux/phy.h>
30#include <linux/ratelimit.h>
31#include <linux/of_mdio.h>
32
33#include <net/dst.h>
34
35#include <asm/octeon/octeon.h>
36
37#include "ethernet-defines.h"
38#include "octeon-ethernet.h"
39#include "ethernet-mdio.h"
40#include "ethernet-util.h"
41
42#include <asm/octeon/cvmx-helper-board.h>
43
44#include <asm/octeon/cvmx-smix-defs.h>
45
46static void cvm_oct_get_drvinfo(struct net_device *dev,
47				struct ethtool_drvinfo *info)
48{
49	strlcpy(info->driver, "cavium-ethernet", sizeof(info->driver));
50	strlcpy(info->version, OCTEON_ETHERNET_VERSION, sizeof(info->version));
51	strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
52}
53
54static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
55{
56	struct octeon_ethernet *priv = netdev_priv(dev);
57
58	if (priv->phydev)
59		return phy_ethtool_gset(priv->phydev, cmd);
60
61	return -EINVAL;
62}
63
64static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
65{
66	struct octeon_ethernet *priv = netdev_priv(dev);
67
68	if (!capable(CAP_NET_ADMIN))
69		return -EPERM;
70
71	if (priv->phydev)
72		return phy_ethtool_sset(priv->phydev, cmd);
73
74	return -EINVAL;
75}
76
77static int cvm_oct_nway_reset(struct net_device *dev)
78{
79	struct octeon_ethernet *priv = netdev_priv(dev);
80
81	if (!capable(CAP_NET_ADMIN))
82		return -EPERM;
83
84	if (priv->phydev)
85		return phy_start_aneg(priv->phydev);
86
87	return -EINVAL;
88}
89
90const struct ethtool_ops cvm_oct_ethtool_ops = {
91	.get_drvinfo = cvm_oct_get_drvinfo,
92	.get_settings = cvm_oct_get_settings,
93	.set_settings = cvm_oct_set_settings,
94	.nway_reset = cvm_oct_nway_reset,
95	.get_link = ethtool_op_get_link,
96};
97
98/**
99 * cvm_oct_ioctl - IOCTL support for PHY control
100 * @dev:    Device to change
101 * @rq:     the request
102 * @cmd:    the command
103 *
104 * Returns Zero on success
105 */
106int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
107{
108	struct octeon_ethernet *priv = netdev_priv(dev);
109
110	if (!netif_running(dev))
111		return -EINVAL;
112
113	if (!priv->phydev)
114		return -EINVAL;
115
116	return phy_mii_ioctl(priv->phydev, rq, cmd);
117}
118
119static void cvm_oct_note_carrier(struct octeon_ethernet *priv,
120				 cvmx_helper_link_info_t li)
121{
122	if (li.s.link_up) {
123		pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d\n",
124				      netdev_name(priv->netdev), li.s.speed,
125				      (li.s.full_duplex) ? "Full" : "Half",
126				      priv->port);
127	} else {
128		pr_notice_ratelimited("%s: Link down\n",
129				      netdev_name(priv->netdev));
130	}
131}
132
133void cvm_oct_adjust_link(struct net_device *dev)
134{
135	struct octeon_ethernet *priv = netdev_priv(dev);
136	cvmx_helper_link_info_t link_info;
137
138	if (priv->last_link != priv->phydev->link) {
139		priv->last_link = priv->phydev->link;
140		link_info.u64 = 0;
141		link_info.s.link_up = priv->last_link ? 1 : 0;
142		link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
143		link_info.s.speed = priv->phydev->speed;
144
145		cvmx_helper_link_set(priv->port, link_info);
146		cvm_oct_note_carrier(priv, link_info);
147	}
148}
149
150int cvm_oct_common_stop(struct net_device *dev)
151{
152	struct octeon_ethernet *priv = netdev_priv(dev);
153	cvmx_helper_link_info_t link_info;
154
155	priv->poll = NULL;
156
157	if (priv->phydev)
158		phy_disconnect(priv->phydev);
159	priv->phydev = NULL;
160
161	if (priv->last_link) {
162		link_info.u64 = 0;
163		priv->last_link = 0;
164
165		cvmx_helper_link_set(priv->port, link_info);
166		cvm_oct_note_carrier(priv, link_info);
167	}
168	return 0;
169}
170
171/**
172 * cvm_oct_phy_setup_device - setup the PHY
173 *
174 * @dev:    Device to setup
175 *
176 * Returns Zero on success, negative on failure
177 */
178int cvm_oct_phy_setup_device(struct net_device *dev)
179{
180	struct octeon_ethernet *priv = netdev_priv(dev);
181	struct device_node *phy_node;
182
183	if (!priv->of_node)
184		goto no_phy;
185
186	phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
187	if (!phy_node)
188		goto no_phy;
189
190	priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
191				      PHY_INTERFACE_MODE_GMII);
192
193	if (priv->phydev == NULL)
194		return -ENODEV;
195
196	priv->last_link = 0;
197	phy_start_aneg(priv->phydev);
198
199	return 0;
200no_phy:
201	/* If there is no phy, assume a direct MAC connection and that
202	 * the link is up.
203	 */
204	netif_carrier_on(dev);
205	return 0;
206}
207