| /* |
| * Atheros AR71xx built-in ethernet mac driver |
| * |
| * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> |
| * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| * |
| * Based on Atheros' AG7100 driver |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| */ |
| |
| #include "ag71xx.h" |
| |
| static void ag71xx_phy_link_adjust(struct net_device *dev) |
| { |
| struct ag71xx *ag = netdev_priv(dev); |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| struct phy_device *phydev = ag->phy_dev; |
| unsigned long flags; |
| int status_change = 0; |
| |
| spin_lock_irqsave(&ag->lock, flags); |
| |
| if (phydev->link) { |
| if (ag->duplex != phydev->duplex |
| || ag->speed != phydev->speed) { |
| status_change = 1; |
| } |
| } |
| |
| if (phydev->link != ag->link) |
| status_change = 1; |
| |
| if (pdata->force_link) { |
| ag->link = 1; |
| ag->duplex = pdata->duplex; |
| ag->speed = pdata->speed; |
| } |
| else { |
| ag->link = phydev->link; |
| ag->duplex = phydev->duplex; |
| ag->speed = phydev->speed; |
| } |
| |
| if (status_change) |
| ag71xx_link_adjust(ag); |
| |
| spin_unlock_irqrestore(&ag->lock, flags); |
| } |
| |
| void ag71xx_phy_start(struct ag71xx *ag) |
| { |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| |
| if (ag->phy_dev) { |
| phy_start(ag->phy_dev); |
| } else if (pdata->switch_data) { |
| ag71xx_ar7240_start(ag); |
| } else { |
| ag->link = 1; |
| ag71xx_link_adjust(ag); |
| } |
| } |
| |
| void ag71xx_phy_stop(struct ag71xx *ag) |
| { |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| unsigned long flags; |
| |
| if (ag->phy_dev) |
| phy_stop(ag->phy_dev); |
| else if (pdata->switch_data) |
| ag71xx_ar7240_stop(ag); |
| |
| spin_lock_irqsave(&ag->lock, flags); |
| if (ag->link) { |
| ag->link = 0; |
| ag71xx_link_adjust(ag); |
| } |
| spin_unlock_irqrestore(&ag->lock, flags); |
| } |
| |
| static int ag71xx_phy_connect_fixed(struct ag71xx *ag) |
| { |
| struct net_device *dev = ag->dev; |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| int ret = 0; |
| |
| /* use fixed settings */ |
| switch (pdata->speed) { |
| case SPEED_10: |
| case SPEED_100: |
| case SPEED_1000: |
| break; |
| default: |
| netdev_err(dev, "invalid speed specified\n"); |
| ret = -EINVAL; |
| break; |
| } |
| |
| netdev_dbg(dev, "using fixed link parameters\n"); |
| |
| ag->duplex = pdata->duplex; |
| ag->speed = pdata->speed; |
| |
| return ret; |
| } |
| |
| static int ag71xx_phy_connect_multi(struct ag71xx *ag) |
| { |
| struct net_device *dev = ag->dev; |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| struct phy_device *phydev = NULL; |
| int phy_addr; |
| int ret = 0; |
| |
| for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { |
| if (!(pdata->phy_mask & (1 << phy_addr))) |
| continue; |
| |
| if (ag->mii_bus->phy_map[phy_addr] == NULL) |
| continue; |
| |
| DBG("%s: PHY found at %s, uid=%08x\n", |
| dev->name, |
| dev_name(&ag->mii_bus->phy_map[phy_addr]->dev), |
| ag->mii_bus->phy_map[phy_addr]->phy_id); |
| |
| if (phydev == NULL) |
| phydev = ag->mii_bus->phy_map[phy_addr]; |
| } |
| |
| if (!phydev) { |
| netdev_err(dev, "no PHY found with phy_mask=%08x\n", |
| pdata->phy_mask); |
| return -ENODEV; |
| } |
| |
| ag->phy_dev = phy_connect(dev, dev_name(&phydev->dev), |
| &ag71xx_phy_link_adjust, 0, |
| pdata->phy_if_mode); |
| |
| if (IS_ERR(ag->phy_dev)) { |
| netdev_err(dev, "could not connect to PHY at %s\n", |
| dev_name(&phydev->dev)); |
| return PTR_ERR(ag->phy_dev); |
| } |
| |
| /* mask with MAC supported features */ |
| if (pdata->has_gbit) |
| phydev->supported &= PHY_GBIT_FEATURES; |
| else |
| phydev->supported &= PHY_BASIC_FEATURES; |
| |
| phydev->advertising = phydev->supported; |
| |
| netdev_info(dev, "connected to PHY at %s [uid=%08x, driver=%s]\n", |
| dev_name(&phydev->dev), phydev->phy_id, phydev->drv->name); |
| |
| ag->link = 0; |
| ag->speed = 0; |
| ag->duplex = -1; |
| |
| return ret; |
| } |
| |
| static int dev_is_class(struct device *dev, void *class) |
| { |
| if (dev->class != NULL && !strcmp(dev->class->name, class)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static struct device *dev_find_class(struct device *parent, char *class) |
| { |
| if (dev_is_class(parent, class)) { |
| get_device(parent); |
| return parent; |
| } |
| |
| return device_find_child(parent, class, dev_is_class); |
| } |
| |
| static struct mii_bus *dev_to_mii_bus(struct device *dev) |
| { |
| struct device *d; |
| |
| d = dev_find_class(dev, "mdio_bus"); |
| if (d != NULL) { |
| struct mii_bus *bus; |
| |
| bus = to_mii_bus(d); |
| put_device(d); |
| |
| return bus; |
| } |
| |
| return NULL; |
| } |
| |
| int __devinit ag71xx_phy_connect(struct ag71xx *ag) |
| { |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| |
| if (pdata->mii_bus_dev == NULL || |
| pdata->mii_bus_dev->bus == NULL ) |
| return ag71xx_phy_connect_fixed(ag); |
| |
| ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev); |
| if (ag->mii_bus == NULL) { |
| netdev_err(ag->dev, "unable to find MII bus on device '%s'\n", |
| dev_name(pdata->mii_bus_dev)); |
| return -ENODEV; |
| } |
| |
| /* Reset the mdio bus explicitly */ |
| if (ag->mii_bus->reset) { |
| mutex_lock(&ag->mii_bus->mdio_lock); |
| ag->mii_bus->reset(ag->mii_bus); |
| mutex_unlock(&ag->mii_bus->mdio_lock); |
| } |
| |
| if (pdata->switch_data) |
| return ag71xx_ar7240_init(ag); |
| |
| if (pdata->phy_mask) |
| return ag71xx_phy_connect_multi(ag); |
| |
| return ag71xx_phy_connect_fixed(ag); |
| } |
| |
| void ag71xx_phy_disconnect(struct ag71xx *ag) |
| { |
| struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); |
| |
| if (pdata->switch_data) |
| ag71xx_ar7240_cleanup(ag); |
| else if (ag->phy_dev) |
| phy_disconnect(ag->phy_dev); |
| } |