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
cvm_oct_sgmii_poll(struct net_device * dev)44 static 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
cvm_oct_sgmii_open(struct net_device * dev)80 int 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
cvm_oct_sgmii_stop(struct net_device * dev)116 int 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
cvm_oct_sgmii_init(struct net_device * dev)129 int 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
cvm_oct_sgmii_uninit(struct net_device * dev)138 void cvm_oct_sgmii_uninit(struct net_device *dev)
139 {
140 cvm_oct_common_uninit(dev);
141 }
142