+++ /dev/null
-/*
- * 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>
-#include <ifxmips_platform.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 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->watchdog_timeo = 10 * HZ;
- dev->mtu = 1500;
- 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 const struct net_device_ops ifxmips_eth_netdev_ops = {
- .ndo_init = ifxmips_mii_dev_init,
- .ndo_open = ifxmips_ifxmips_mii_open,
- .ndo_stop = ifxmips_mii_release,
- .ndo_start_xmit = ifxmips_mii_tx,
- .ndo_tx_timeout = ifxmips_mii_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int
-ifxmips_mii_probe(struct platform_device *dev)
-{
- int result = 0;
- struct ifxmips_eth_data *eth = (struct ifxmips_eth_data*)dev->dev.platform_data;
- ifxmips_mii0_dev = alloc_etherdev(sizeof(struct ifxmips_mii_priv));
- ifxmips_mii0_dev->netdev_ops = &ifxmips_eth_netdev_ops;
- memcpy(mac_addr, eth->mac, 6);
- strcpy(ifxmips_mii0_dev->name, "eth%d");
- ifxmips_mii_chip_init(eth->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");
projects / openwrt / svn-archive / archive.git / blobdiff