target/linux/ath79/files-4.19/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include <linux/of_mdio.h>
  15 #include "ag71xx.h"
  16
  17 static void ag71xx_phy_link_adjust(struct net_device *dev)
  18 {
  19         struct ag71xx *ag = netdev_priv(dev);
  20         struct phy_device *phydev = ag->phy_dev;
  21         unsigned long flags;
  22         int status_change = 0;
  23
  24         spin_lock_irqsave(&ag->lock, flags);
  25
  26         if (phydev->link) {
  27                 if (ag->duplex != phydev->duplex
  28                     || ag->speed != phydev->speed) {
  29                         status_change = 1;
  30                 }
  31         }
  32
  33         if (phydev->link != ag->link)
  34                 status_change = 1;
  35
  36         ag->link = phydev->link;
  37         ag->duplex = phydev->duplex;
  38         ag->speed = phydev->speed;
  39
  40         if (status_change)
  41                 ag71xx_link_adjust(ag);
  42
  43         spin_unlock_irqrestore(&ag->lock, flags);
  44 }
  45
  46 int ag71xx_phy_connect(struct ag71xx *ag)
  47 {
  48         struct device_node *np = ag->pdev->dev.of_node;
  49         struct device_node *phy_node;
  50         int ret;
  51
  52         if (of_phy_is_fixed_link(np)) {
  53                 ret = of_phy_register_fixed_link(np);
  54                 if (ret < 0) {
  55                         dev_err(&ag->pdev->dev,
  56                                 "Failed to register fixed PHY link: %d\n", ret);
  57                         return ret;
  58                 }
  59
  60                 phy_node = of_node_get(np);
  61         } else {
  62                 phy_node = of_parse_phandle(np, "phy-handle", 0);
  63         }
  64
  65         if (!phy_node) {
  66                 dev_err(&ag->pdev->dev,
  67                         "Could not find valid phy node\n");
  68                 return -ENODEV;
  69         }
  70
  71         ag->phy_dev = of_phy_connect(ag->dev, phy_node, ag71xx_phy_link_adjust,
  72                                      0, ag->phy_if_mode);
  73
  74         of_node_put(phy_node);
  75
  76         if (!ag->phy_dev) {
  77                 dev_err(&ag->pdev->dev,
  78                         "Could not connect to PHY device. Deferring probe.\n");
  79                 return -EPROBE_DEFER;
  80         }
  81
  82         dev_info(&ag->pdev->dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
  83                     phydev_name(ag->phy_dev),
  84                     ag->phy_dev->phy_id, ag->phy_dev->drv->name);
  85
  86         return 0;
  87 }
  88
  89 void ag71xx_phy_disconnect(struct ag71xx *ag)
  90 {
  91         phy_disconnect(ag->phy_dev);
  92 }