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/phy.h>
28#include <linux/kernel.h>
29#include <linux/netdevice.h>
30#include <linux/ratelimit.h>
31#include <net/dst.h>
32
33#include <asm/octeon/octeon.h>
34
35#include "ethernet-defines.h"
36#include "octeon-ethernet.h"
37#include "ethernet-util.h"
38#include "ethernet-mdio.h"
39
40#include <asm/octeon/cvmx-helper.h>
41
42#include <asm/octeon/cvmx-gmxx-defs.h>
43
44static void cvm_oct_sgmii_poll(struct net_device *dev)
45{
46	struct octeon_ethernet *priv = netdev_priv(dev);
47	cvmx_helper_link_info_t link_info;
48
49	link_info = cvmx_helper_link_get(priv->port);
50	if (link_info.u64 == priv->link_info)
51		return;
52
53	link_info = cvmx_helper_link_autoconf(priv->port);
54	priv->link_info = link_info.u64;
55
56	/* Tell Linux */
57	if (link_info.s.link_up) {
58
59		if (!netif_carrier_ok(dev))
60			netif_carrier_on(dev);
61		if (priv->queue != -1)
62			printk_ratelimited
63			    ("%s: %u Mbps %s duplex, port %2d, queue %2d\n",
64			     dev->name, link_info.s.speed,
65			     (link_info.s.full_duplex) ? "Full" : "Half",
66			     priv->port, priv->queue);
67		else
68			printk_ratelimited
69				("%s: %u Mbps %s duplex, port %2d, POW\n",
70				 dev->name, link_info.s.speed,
71				 (link_info.s.full_duplex) ? "Full" : "Half",
72				 priv->port);
73	} else {
74		if (netif_carrier_ok(dev))
75			netif_carrier_off(dev);
76		printk_ratelimited("%s: Link down\n", dev->name);
77	}
78}
79
80int cvm_oct_sgmii_open(struct net_device *dev)
81{
82	union cvmx_gmxx_prtx_cfg gmx_cfg;
83	struct octeon_ethernet *priv = netdev_priv(dev);
84	int interface = INTERFACE(priv->port);
85	int index = INDEX(priv->port);
86	cvmx_helper_link_info_t link_info;
87	int rv;
88
89	rv = cvm_oct_phy_setup_device(dev);
90	if (rv)
91		return rv;
92
93	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
94	gmx_cfg.s.en = 1;
95	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
96
97	if (octeon_is_simulation())
98		return 0;
99
100	if (priv->phydev) {
101		int r = phy_read_status(priv->phydev);
102
103		if (r == 0 && priv->phydev->link == 0)
104			netif_carrier_off(dev);
105		cvm_oct_adjust_link(dev);
106	} else {
107		link_info = cvmx_helper_link_get(priv->port);
108		if (!link_info.s.link_up)
109			netif_carrier_off(dev);
110		priv->poll = cvm_oct_sgmii_poll;
111		cvm_oct_sgmii_poll(dev);
112	}
113	return 0;
114}
115
116int cvm_oct_sgmii_stop(struct net_device *dev)
117{
118	union cvmx_gmxx_prtx_cfg gmx_cfg;
119	struct octeon_ethernet *priv = netdev_priv(dev);
120	int interface = INTERFACE(priv->port);
121	int index = INDEX(priv->port);
122
123	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
124	gmx_cfg.s.en = 0;
125	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
126	return cvm_oct_common_stop(dev);
127}
128
129int cvm_oct_sgmii_init(struct net_device *dev)
130{
131	cvm_oct_common_init(dev);
132	dev->netdev_ops->ndo_stop(dev);
133
134	/* FIXME: Need autoneg logic */
135	return 0;
136}
137
138void cvm_oct_sgmii_uninit(struct net_device *dev)
139{
140	cvm_oct_common_uninit(dev);
141}
142