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 }