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