+Index: linux-2.6.30.8/drivers/net/ifxmips_mii0.c
+===================================================================
+--- /dev/null 2010-01-25 20:01:36.843225078 +0100
++++ linux-2.6.30.10/drivers/net/ifxmips_mii0.c 2010-03-13 19:04:25.000000000 +0100
+@@ -0,0 +1,489 @@
++/*
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * Copyright (C) 2005 Wu Qi Ming <Qi-Ming.Wu@infineon.com>
++ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/interrupt.h>
++#include <linux/uaccess.h>
++#include <linux/in.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/phy.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/skbuff.h>
++#include <linux/mm.h>
++#include <linux/platform_device.h>
++#include <linux/ethtool.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++
++#include <asm/checksum.h>
++
++#include <ifxmips.h>
++#include <ifxmips_dma.h>
++#include <ifxmips_pmu.h>
++
++struct ifxmips_mii_priv {
++ struct net_device_stats stats;
++ struct dma_device_info *dma_device;
++ struct sk_buff *skb;
++
++ struct mii_bus *mii_bus;
++ struct phy_device *phydev;
++ int oldlink, oldspeed, oldduplex;
++};
++
++static struct net_device *ifxmips_mii0_dev;
++static unsigned char mac_addr[MAX_ADDR_LEN];
++
++static int ifxmips_mdiobus_write(struct mii_bus *bus, int phy_addr,
++ int phy_reg, u16 phy_data)
++{
++ u32 val = MDIO_ACC_REQUEST |
++ ((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
++ ((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET) |
++ phy_data;
++
++ while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
++ ;
++ ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
++
++ return 0;
++}
++
++static int ifxmips_mdiobus_read(struct mii_bus *bus, int phy_addr, int phy_reg)
++{
++ u32 val = MDIO_ACC_REQUEST | MDIO_ACC_READ |
++ ((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
++ ((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET);
++
++ while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
++ ;
++ ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
++ while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
++ ;
++ val = ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_VAL_MASK;
++ return val;
++}
++
++int ifxmips_ifxmips_mii_open(struct net_device *dev)
++{
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
++ struct dma_device_info *dma_dev = priv->dma_device;
++ int i;
++
++ for (i = 0; i < dma_dev->max_rx_chan_num; i++) {
++ if ((dma_dev->rx_chan[i])->control == IFXMIPS_DMA_CH_ON)
++ (dma_dev->rx_chan[i])->open(dma_dev->rx_chan[i]);
++ }
++ netif_start_queue(dev);
++ return 0;
++}
++
++int ifxmips_mii_release(struct net_device *dev)
++{
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
++ struct dma_device_info *dma_dev = priv->dma_device;
++ int i;
++
++ for (i = 0; i < dma_dev->max_rx_chan_num; i++)
++ dma_dev->rx_chan[i]->close(dma_dev->rx_chan[i]);
++ netif_stop_queue(dev);
++ return 0;
++}
++
++int ifxmips_mii_hw_receive(struct net_device *dev, struct dma_device_info *dma_dev)
++{
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
++ unsigned char *buf = NULL;
++ struct sk_buff *skb = NULL;
++ int len = 0;
++
++ len = dma_device_read(dma_dev, &buf, (void **)&skb);
++
++ if (len >= ETHERNET_PACKET_DMA_BUFFER_SIZE) {
++ printk(KERN_INFO "ifxmips_mii0: packet too large %d\n", len);
++ goto ifxmips_mii_hw_receive_err_exit;
++ }
++
++ /* remove CRC */
++ len -= 4;
++ if (skb == NULL) {
++ printk(KERN_INFO "ifxmips_mii0: cannot restore pointer\n");
++ goto ifxmips_mii_hw_receive_err_exit;
++ }
++
++ if (len > (skb->end - skb->tail)) {
++ printk(KERN_INFO "ifxmips_mii0: BUG, len:%d end:%p tail:%p\n",
++ (len+4), skb->end, skb->tail);
++ goto ifxmips_mii_hw_receive_err_exit;
++ }
++
++ skb_put(skb, len);
++ skb->dev = dev;
++ skb->protocol = eth_type_trans(skb, dev);
++ netif_rx(skb);
++
++ priv->stats.rx_packets++;
++ priv->stats.rx_bytes += len;
++ return 0;
++
++ifxmips_mii_hw_receive_err_exit:
++ if (len == 0) {
++ if (skb)
++ dev_kfree_skb_any(skb);
++ priv->stats.rx_errors++;
++ priv->stats.rx_dropped++;
++ return -EIO;
++ } else {
++ return len;
++ }
++}
++
++int ifxmips_mii_hw_tx(char *buf, int len, struct net_device *dev)
++{
++ int ret = 0;
++ struct ifxmips_mii_priv *priv = netdev_priv(dev);
++ struct dma_device_info *dma_dev = priv->dma_device;
++ ret = dma_device_write(dma_dev, buf, len, priv->skb);
++ return ret;
++}
++
++int ifxmips_mii_tx(struct sk_buff *skb, struct net_device *dev)
++{
++ int len;
++ char *data;
++ struct ifxmips_mii_priv *priv = netdev_priv(dev);
++ struct dma_device_info *dma_dev = priv->dma_device;
++
++ len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
++ data = skb->data;
++ priv->skb = skb;
++ dev->trans_start = jiffies;
++ /* TODO: we got more than 1 dma channel,
++ so we should do something intelligent here to select one */
++ dma_dev->current_tx_chan = 0;
++
++ wmb();
++
++ if (ifxmips_mii_hw_tx(data, len, dev) != len) {
++ dev_kfree_skb_any(skb);
++ priv->stats.tx_errors++;
++ priv->stats.tx_dropped++;
++ } else {
++ priv->stats.tx_packets++;
++ priv->stats.tx_bytes += len;
++ }
++
++ return 0;
++}
++
++void ifxmips_mii_tx_timeout(struct net_device *dev)
++{
++ int i;
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
++
++ priv->stats.tx_errors++;
++ for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
++ priv->dma_device->tx_chan[i]->disable_irq(priv->dma_device->tx_chan[i]);
++ netif_wake_queue(dev);
++ return;
++}
++
++int dma_intr_handler(struct dma_device_info *dma_dev, int status)
++{
++ int i;
++
++ switch (status) {
++ case RCV_INT:
++ ifxmips_mii_hw_receive(ifxmips_mii0_dev, dma_dev);
++ break;
++
++ case TX_BUF_FULL_INT:
++ printk(KERN_INFO "ifxmips_mii0: tx buffer full\n");
++ netif_stop_queue(ifxmips_mii0_dev);
++ for (i = 0; i < dma_dev->max_tx_chan_num; i++) {
++ if ((dma_dev->tx_chan[i])->control == IFXMIPS_DMA_CH_ON)
++ dma_dev->tx_chan[i]->enable_irq(dma_dev->tx_chan[i]);
++ }
++ break;
++
++ case TRANSMIT_CPT_INT:
++ for (i = 0; i < dma_dev->max_tx_chan_num; i++)
++ dma_dev->tx_chan[i]->disable_irq(dma_dev->tx_chan[i]);
++
++ netif_wake_queue(ifxmips_mii0_dev);
++ break;
++ }
++
++ return 0;
++}
++
++unsigned char *ifxmips_etop_dma_buffer_alloc(int len, int *byte_offset, void **opt)
++{
++ unsigned char *buffer = NULL;
++ struct sk_buff *skb = NULL;
++
++ skb = dev_alloc_skb(ETHERNET_PACKET_DMA_BUFFER_SIZE);
++ if (skb == NULL)
++ return NULL;
++
++ buffer = (unsigned char *)(skb->data);
++ skb_reserve(skb, 2);
++ *(int *)opt = (int)skb;
++ *byte_offset = 2;
++
++ return buffer;
++}
++
++void ifxmips_etop_dma_buffer_free(unsigned char *dataptr, void *opt)
++{
++ struct sk_buff *skb = NULL;
++
++ if (opt == NULL) {
++ kfree(dataptr);
++ } else {
++ skb = (struct sk_buff *)opt;
++ dev_kfree_skb_any(skb);
++ }
++}
++
++static struct net_device_stats *ifxmips_get_stats(struct net_device *dev)
++{
++ return &((struct ifxmips_mii_priv *)netdev_priv(dev))->stats;
++}
++
++static void
++ifxmips_adjust_link(struct net_device *dev)
++{
++ struct ifxmips_mii_priv *priv = netdev_priv(dev);
++ struct phy_device *phydev = priv->phydev;
++ int new_state = 0;
++
++ /* Did anything change? */
++ if (priv->oldlink != phydev->link ||
++ priv->oldduplex != phydev->duplex ||
++ priv->oldspeed != phydev->speed) {
++ /* Yes, so update status and mark as changed */
++ new_state = 1;
++ priv->oldduplex = phydev->duplex;
++ priv->oldspeed = phydev->speed;
++ priv->oldlink = phydev->link;
++ }
++
++ /* If link status changed, show new status */
++ if (new_state)
++ phy_print_status(phydev);
++}
++
++static int mii_probe(struct net_device *dev)
++{
++ struct ifxmips_mii_priv *priv = netdev_priv(dev);
++ struct phy_device *phydev = NULL;
++ int phy_addr;
++
++ priv->oldlink = 0;
++ priv->oldspeed = 0;
++ priv->oldduplex = -1;
++
++ /* find the first (lowest address) PHY on the current MAC's MII bus */
++ for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
++ if (priv->mii_bus->phy_map[phy_addr]) {
++ phydev = priv->mii_bus->phy_map[phy_addr];
++ break; /* break out with first one found */
++ }
++ }
++
++ if (!phydev) {
++ printk (KERN_ERR "%s: no PHY found\n", dev->name);
++ return -ENODEV;
++ }
++
++ /* now we are supposed to have a proper phydev, to attach to... */
++ BUG_ON(!phydev);
++ BUG_ON(phydev->attached_dev);
++
++ phydev = phy_connect(dev, dev_name(&phydev->dev), &ifxmips_adjust_link,
++ 0, PHY_INTERFACE_MODE_MII);
++
++ if (IS_ERR(phydev)) {
++ printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
++ return PTR_ERR(phydev);
++ }
++
++ /* mask with MAC supported features */
++ phydev->supported &= (SUPPORTED_10baseT_Half
++ | SUPPORTED_10baseT_Full
++ | SUPPORTED_100baseT_Half
++ | SUPPORTED_100baseT_Full
++ | SUPPORTED_Autoneg
++ /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
++ | SUPPORTED_MII
++ | SUPPORTED_TP);
++
++ phydev->advertising = phydev->supported;
++
++ priv->phydev = phydev;
++
++ printk(KERN_INFO "%s: attached PHY driver [%s] "
++ "(mii_bus:phy_addr=%s, irq=%d)\n",
++ dev->name, phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
++
++ return 0;
++}
++
++
++static int ifxmips_mii_dev_init(struct net_device *dev)
++{
++ int i;
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
++ ether_setup(dev);
++ dev->open = ifxmips_ifxmips_mii_open;
++ dev->stop = ifxmips_mii_release;
++ dev->hard_start_xmit = ifxmips_mii_tx;
++ dev->get_stats = ifxmips_get_stats;
++ dev->tx_timeout = ifxmips_mii_tx_timeout;
++ dev->watchdog_timeo = 10 * HZ;
++ memset(priv, 0, sizeof(struct ifxmips_mii_priv));
++ priv->dma_device = dma_device_reserve("PPE");
++ if (!priv->dma_device) {
++ BUG();
++ return -ENODEV;
++ }
++ priv->dma_device->buffer_alloc = &ifxmips_etop_dma_buffer_alloc;
++ priv->dma_device->buffer_free = &ifxmips_etop_dma_buffer_free;
++ priv->dma_device->intr_handler = &dma_intr_handler;
++ priv->dma_device->max_rx_chan_num = 4;
++
++ for (i = 0; i < priv->dma_device->max_rx_chan_num; i++) {
++ priv->dma_device->rx_chan[i]->packet_size = ETHERNET_PACKET_DMA_BUFFER_SIZE;
++ priv->dma_device->rx_chan[i]->control = IFXMIPS_DMA_CH_ON;
++ }
++
++ for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
++ if (i == 0)
++ priv->dma_device->tx_chan[i]->control = IFXMIPS_DMA_CH_ON;
++ else
++ priv->dma_device->tx_chan[i]->control = IFXMIPS_DMA_CH_OFF;
++
++ dma_device_register(priv->dma_device);
++
++ printk(KERN_INFO "%s: using mac=", dev->name);
++ for (i = 0; i < 6; i++) {
++ dev->dev_addr[i] = mac_addr[i];
++ printk("%02X%c", dev->dev_addr[i], (i == 5) ? ('\n') : (':'));
++ }
++
++ priv->mii_bus = mdiobus_alloc();
++ if (priv->mii_bus == NULL)
++ return -ENOMEM;
++
++ priv->mii_bus->priv = dev;
++ priv->mii_bus->read = ifxmips_mdiobus_read;
++ priv->mii_bus->write = ifxmips_mdiobus_write;
++ priv->mii_bus->name = "ifxmips_mii";
++ snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
++ priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
++ for(i = 0; i < PHY_MAX_ADDR; ++i)
++ priv->mii_bus->irq[i] = PHY_POLL;
++
++ mdiobus_register(priv->mii_bus);
++
++ return mii_probe(dev);
++}
++
++static void ifxmips_mii_chip_init(int mode)
++{
++ ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_DMA);
++ ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_PPE);
++
++ if (mode == REV_MII_MODE)
++ ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_REVERSE, IFXMIPS_PPE32_CFG);
++ else if (mode == MII_MODE)
++ ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_NORMAL, IFXMIPS_PPE32_CFG);
++ ifxmips_w32(PPE32_PLEN_UNDER | PPE32_PLEN_OVER, IFXMIPS_PPE32_IG_PLEN_CTRL);
++ ifxmips_w32(PPE32_CGEN, IFXMIPS_PPE32_ENET_MAC_CFG);
++ wmb();
++}
++
++static int ifxmips_mii_probe(struct platform_device *dev)
++{
++ int result = 0;
++ unsigned char *mac = (unsigned char *)dev->dev.platform_data;
++ ifxmips_mii0_dev = alloc_etherdev(sizeof(struct ifxmips_mii_priv));
++ ifxmips_mii0_dev->init = ifxmips_mii_dev_init;
++ memcpy(mac_addr, mac, 6);
++ strcpy(ifxmips_mii0_dev->name, "eth%d");
++ ifxmips_mii_chip_init(REV_MII_MODE);
++ result = register_netdev(ifxmips_mii0_dev);
++ if (result) {
++ printk(KERN_INFO "ifxmips_mii0: error %i registering device \"%s\"\n", result, ifxmips_mii0_dev->name);
++ goto out;
++ }
++
++ printk(KERN_INFO "ifxmips_mii0: driver loaded!\n");
++
++out:
++ return result;
++}
++
++static int ifxmips_mii_remove(struct platform_device *dev)
++{
++ struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(ifxmips_mii0_dev);
++
++ printk(KERN_INFO "ifxmips_mii0: ifxmips_mii0 cleanup\n");
++
++ dma_device_unregister(priv->dma_device);
++ dma_device_release(priv->dma_device);
++ kfree(priv->dma_device);
++ unregister_netdev(ifxmips_mii0_dev);
++ return 0;
++}
++
++static struct platform_driver ifxmips_mii_driver = {
++ .probe = ifxmips_mii_probe,
++ .remove = ifxmips_mii_remove,
++ .driver = {
++ .name = "ifxmips_mii0",
++ .owner = THIS_MODULE,
++ },
++};
++
++int __init ifxmips_mii_init(void)
++{
++ int ret = platform_driver_register(&ifxmips_mii_driver);
++ if (ret)
++ printk(KERN_INFO "ifxmips_mii0: Error registering platfom driver!");
++ return ret;
++}
++
++static void __exit ifxmips_mii_cleanup(void)
++{
++ platform_driver_unregister(&ifxmips_mii_driver);
++}
++
++module_init(ifxmips_mii_init);
++module_exit(ifxmips_mii_cleanup);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_DESCRIPTION("ethernet driver for IFXMIPS boards");
++
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