LXR linux/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
  44static 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
  80int 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
 116int 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
 129int 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
 138void cvm_oct_sgmii_uninit(struct net_device *dev)
 139{
 140        cvm_oct_common_uninit(dev);
 141}
 142