kernel/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/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
  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
  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
 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
 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
 138 void cvm_oct_sgmii_uninit(struct net_device *dev)
 139 {
 140         cvm_oct_common_uninit(dev);
 141 }