-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2009 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 unsigned char *ag71xx_speed_str(struct ag71xx *ag)
-{
- switch (ag->speed) {
- case SPEED_1000:
- return "1000";
- case SPEED_100:
- return "100";
- case SPEED_10:
- return "10";
- }
-
- return "?";
-}
-
-static void ag71xx_phy_link_update(struct ag71xx *ag)
-{
- struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
- u32 cfg2;
- u32 ifctl;
- u32 fifo5;
- u32 mii_speed;
-
- if (!ag->link) {
- netif_carrier_off(ag->dev);
- if (netif_msg_link(ag))
- printk(KERN_INFO "%s: link down\n", ag->dev->name);
- return;
- }
-
- cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
- cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
- cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
-
- ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
- ifctl &= ~(MAC_IFCTL_SPEED);
-
- fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
- fifo5 &= ~FIFO_CFG5_BM;
-
- switch (ag->speed) {
- case SPEED_1000:
- mii_speed = MII_CTRL_SPEED_1000;
- cfg2 |= MAC_CFG2_IF_1000;
- fifo5 |= FIFO_CFG5_BM;
- break;
- case SPEED_100:
- mii_speed = MII_CTRL_SPEED_100;
- cfg2 |= MAC_CFG2_IF_10_100;
- ifctl |= MAC_IFCTL_SPEED;
- break;
- case SPEED_10:
- mii_speed = MII_CTRL_SPEED_10;
- cfg2 |= MAC_CFG2_IF_10_100;
- break;
- default:
- BUG();
- return;
- }
-
- if (pdata->is_ar91xx)
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff);
- else if (pdata->is_ar724x)
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3);
- else
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
-
- if (pdata->set_pll)
- pdata->set_pll(ag->speed);
-
- ag71xx_mii_ctrl_set_speed(ag, mii_speed);
-
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
- ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
-
- netif_carrier_on(ag->dev);
- if (netif_msg_link(ag))
- printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
- ag->dev->name,
- ag71xx_speed_str(ag),
- (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
-
- DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
-
- DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
-
- DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
- ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
- ag71xx_mii_ctrl_rr(ag));
-}
-
-static void ag71xx_phy_link_adjust(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- 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;
-
- ag->link = phydev->link;
- ag->duplex = phydev->duplex;
- ag->speed = phydev->speed;
-
- if (status_change)
- ag71xx_phy_link_update(ag);
-
- spin_unlock_irqrestore(&ag->lock, flags);
-}
-
-void ag71xx_phy_start(struct ag71xx *ag)
-{
- if (ag->phy_dev) {
- phy_start(ag->phy_dev);
- } else {
- struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
-
- ag->duplex = pdata->duplex;
- ag->speed = pdata->speed;
- ag->link = 1;
- ag71xx_phy_link_update(ag);
- }
-}
-
-void ag71xx_phy_stop(struct ag71xx *ag)
-{
- if (ag->phy_dev) {
- phy_stop(ag->phy_dev);
- } else {
- ag->duplex = -1;
- ag->link = 0;
- ag->speed = 0;
- ag71xx_phy_link_update(ag);
- }
-}
-
-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:
- printk(KERN_ERR "%s: invalid speed specified\n",
- dev->name);
- ret = -EINVAL;
- break;
- }
-
- 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_count = 0;
- 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];
-
- phy_count++;
- }
-
- switch (phy_count) {
- case 0:
- printk(KERN_ERR "%s: no PHY found with phy_mask=%08x\n",
- dev->name, pdata->phy_mask);
- ret = -ENODEV;
- break;
- case 1:
- 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)) {
- printk(KERN_ERR "%s: could not connect to PHY at %s\n",
- dev->name, 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;
-
- printk(KERN_DEBUG "%s: connected to PHY at %s "
- "[uid=%08x, driver=%s]\n",
- dev->name, dev_name(&phydev->dev),
- phydev->phy_id, phydev->drv->name);
-
- ag->link = 0;
- ag->speed = 0;
- ag->duplex = -1;
- break;
-
- default:
- printk(KERN_DEBUG "%s: connected to %d PHYs\n",
- dev->name, phy_count);
- ret = ag71xx_phy_connect_fixed(ag);
- break;
- }
-
- 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 ag71xx_phy_connect(struct ag71xx *ag)
-{
- struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
-
- ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
- if (ag->mii_bus == NULL) {
- printk(KERN_ERR "%s: unable to find MII bus on device '%s'\n",
- ag->dev->name, dev_name(pdata->mii_bus_dev));
- return -ENODEV;
- }
-
- /* Reset the mdio bus explicitly */
- mutex_lock(&ag->mii_bus->mdio_lock);
- ag->mii_bus->reset(ag->mii_bus);
- mutex_unlock(&ag->mii_bus->mdio_lock);
-
- if (pdata->phy_mask)
- return ag71xx_phy_connect_multi(ag);
-
- return ag71xx_phy_connect_fixed(ag);
-}
-
-void ag71xx_phy_disconnect(struct ag71xx *ag)
-{
- if (ag->phy_dev)
- phy_disconnect(ag->phy_dev);
-}
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