summaryrefslogtreecommitdiffstats
path: root/drivers/staging/octeon/ethernet-mdio.c
blob: b3049108edc45a79dd85df9ff5bd912ad485f540 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
// SPDX-License-Identifier: GPL-2.0
/*
 * This file is based on code from OCTEON SDK by Cavium Networks.
 *
 * Copyright (c) 2003-2007 Cavium Networks
 */

#include <linux/kernel.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/ratelimit.h>
#include <linux/of_mdio.h>
#include <generated/utsrelease.h>
#include <net/dst.h>

#include "octeon-ethernet.h"
#include "ethernet-defines.h"
#include "ethernet-mdio.h"
#include "ethernet-util.h"

static void cvm_oct_get_drvinfo(struct net_device *dev,
				struct ethtool_drvinfo *info)
{
	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
	strscpy(info->version, UTS_RELEASE, sizeof(info->version));
	strscpy(info->bus_info, "Builtin", sizeof(info->bus_info));
}

static int cvm_oct_nway_reset(struct net_device *dev)
{
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (dev->phydev)
		return phy_start_aneg(dev->phydev);

	return -EINVAL;
}

const struct ethtool_ops cvm_oct_ethtool_ops = {
	.get_drvinfo = cvm_oct_get_drvinfo,
	.nway_reset = cvm_oct_nway_reset,
	.get_link = ethtool_op_get_link,
	.get_link_ksettings = phy_ethtool_get_link_ksettings,
	.set_link_ksettings = phy_ethtool_set_link_ksettings,
};

/**
 * cvm_oct_ioctl - IOCTL support for PHY control
 * @dev:    Device to change
 * @rq:     the request
 * @cmd:    the command
 *
 * Returns Zero on success
 */
int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	if (!netif_running(dev))
		return -EINVAL;

	if (!dev->phydev)
		return -EINVAL;

	return phy_mii_ioctl(dev->phydev, rq, cmd);
}

void cvm_oct_note_carrier(struct octeon_ethernet *priv,
			  union cvmx_helper_link_info li)
{
	if (li.s.link_up) {
		pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
				      netdev_name(priv->netdev), li.s.speed,
				      (li.s.full_duplex) ? "Full" : "Half",
				      priv->port, priv->queue);
	} else {
		pr_notice_ratelimited("%s: Link down\n",
				      netdev_name(priv->netdev));
	}
}

void cvm_oct_adjust_link(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	union cvmx_helper_link_info link_info;

	link_info.u64		= 0;
	link_info.s.link_up	= dev->phydev->link ? 1 : 0;
	link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
	link_info.s.speed	= dev->phydev->speed;
	priv->link_info		= link_info.u64;

	/*
	 * The polling task need to know about link status changes.
	 */
	if (priv->poll)
		priv->poll(dev);

	if (priv->last_link != dev->phydev->link) {
		priv->last_link = dev->phydev->link;
		cvmx_helper_link_set(priv->port, link_info);
		cvm_oct_note_carrier(priv, link_info);
	}
}

int cvm_oct_common_stop(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	int interface = INTERFACE(priv->port);
	union cvmx_helper_link_info link_info;
	union cvmx_gmxx_prtx_cfg gmx_cfg;
	int index = INDEX(priv->port);

	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
	gmx_cfg.s.en = 0;
	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);

	priv->poll = NULL;

	if (dev->phydev)
		phy_disconnect(dev->phydev);

	if (priv->last_link) {
		link_info.u64 = 0;
		priv->last_link = 0;

		cvmx_helper_link_set(priv->port, link_info);
		cvm_oct_note_carrier(priv, link_info);
	}
	return 0;
}

/**
 * cvm_oct_phy_setup_device - setup the PHY
 *
 * @dev:    Device to setup
 *
 * Returns Zero on success, negative on failure
 */
int cvm_oct_phy_setup_device(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	struct device_node *phy_node;
	struct phy_device *phydev = NULL;

	if (!priv->of_node)
		goto no_phy;

	phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
	if (!phy_node && of_phy_is_fixed_link(priv->of_node))
		phy_node = of_node_get(priv->of_node);
	if (!phy_node)
		goto no_phy;

	phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
				priv->phy_mode);
	of_node_put(phy_node);

	if (!phydev)
		return -EPROBE_DEFER;

	priv->last_link = 0;
	phy_start(phydev);

	return 0;
no_phy:
	/* If there is no phy, assume a direct MAC connection and that
	 * the link is up.
	 */
	netif_carrier_on(dev);
	return 0;
}