58fa39c1d6757727285e20547269124cb2b1e4db
[linux-2.6.git] / drivers / staging / octeon / ethernet-sgmii.c
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/netdevice.h>
29 #include <linux/mii.h>
30 #include <net/dst.h>
31
32 #include <asm/octeon/octeon.h>
33
34 #include "ethernet-defines.h"
35 #include "octeon-ethernet.h"
36 #include "ethernet-util.h"
37 #include "ethernet-common.h"
38
39 #include "cvmx-helper.h"
40
41 #include "cvmx-gmxx-defs.h"
42
43 static int cvm_oct_sgmii_open(struct net_device *dev)
44 {
45         union cvmx_gmxx_prtx_cfg gmx_cfg;
46         struct octeon_ethernet *priv = netdev_priv(dev);
47         int interface = INTERFACE(priv->port);
48         int index = INDEX(priv->port);
49         cvmx_helper_link_info_t link_info;
50
51         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
52         gmx_cfg.s.en = 1;
53         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
54
55         if (!octeon_is_simulation()) {
56                 link_info = cvmx_helper_link_get(priv->port);
57                 if (!link_info.s.link_up)
58                         netif_carrier_off(dev);
59         }
60
61         return 0;
62 }
63
64 static int cvm_oct_sgmii_stop(struct net_device *dev)
65 {
66         union cvmx_gmxx_prtx_cfg gmx_cfg;
67         struct octeon_ethernet *priv = netdev_priv(dev);
68         int interface = INTERFACE(priv->port);
69         int index = INDEX(priv->port);
70
71         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
72         gmx_cfg.s.en = 0;
73         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
74         return 0;
75 }
76
77 static void cvm_oct_sgmii_poll(struct net_device *dev)
78 {
79         struct octeon_ethernet *priv = netdev_priv(dev);
80         cvmx_helper_link_info_t link_info;
81
82         link_info = cvmx_helper_link_get(priv->port);
83         if (link_info.u64 == priv->link_info)
84                 return;
85
86         link_info = cvmx_helper_link_autoconf(priv->port);
87         priv->link_info = link_info.u64;
88
89         /* Tell Linux */
90         if (link_info.s.link_up) {
91
92                 if (!netif_carrier_ok(dev))
93                         netif_carrier_on(dev);
94                 if (priv->queue != -1)
95                         DEBUGPRINT
96                             ("%s: %u Mbps %s duplex, port %2d, queue %2d\n",
97                              dev->name, link_info.s.speed,
98                              (link_info.s.full_duplex) ? "Full" : "Half",
99                              priv->port, priv->queue);
100                 else
101                         DEBUGPRINT("%s: %u Mbps %s duplex, port %2d, POW\n",
102                                    dev->name, link_info.s.speed,
103                                    (link_info.s.full_duplex) ? "Full" : "Half",
104                                    priv->port);
105         } else {
106                 if (netif_carrier_ok(dev))
107                         netif_carrier_off(dev);
108                 DEBUGPRINT("%s: Link down\n", dev->name);
109         }
110 }
111
112 int cvm_oct_sgmii_init(struct net_device *dev)
113 {
114         struct octeon_ethernet *priv = netdev_priv(dev);
115         cvm_oct_common_init(dev);
116         dev->open = cvm_oct_sgmii_open;
117         dev->stop = cvm_oct_sgmii_stop;
118         dev->stop(dev);
119         if (!octeon_is_simulation())
120                 priv->poll = cvm_oct_sgmii_poll;
121
122         /* FIXME: Need autoneg logic */
123         return 0;
124 }
125
126 void cvm_oct_sgmii_uninit(struct net_device *dev)
127 {
128         cvm_oct_common_uninit(dev);
129 }