+++ /dev/null
-/*
- * Driver for BCM963xx builtin Ethernet mac
- *
- * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/clk.h>
-#include <linux/etherdevice.h>
-#include <linux/delay.h>
-#include <linux/ethtool.h>
-#include <linux/crc32.h>
-#include <linux/err.h>
-#include <linux/dma-mapping.h>
-#include <linux/platform_device.h>
-#include <linux/if_vlan.h>
-#include <linux/version.h>
-
-#include <bcm63xx_dev_enet.h>
-#include "bcm63xx_enet.h"
-
-static char bcm_enet_driver_name[] = "bcm63xx_enet";
-static char bcm_enet_driver_version[] = "1.0";
-
-static int copybreak __read_mostly = 128;
-module_param(copybreak, int, 0);
-MODULE_PARM_DESC(copybreak, "Receive copy threshold");
-
-/* io memory shared between all devices */
-static void __iomem *bcm_enet_shared_base;
-
-/*
- * io helpers to access mac registers
- */
-static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
-{
- return bcm_readl(priv->base + off);
-}
-
-static inline void enet_writel(struct bcm_enet_priv *priv,
- u32 val, u32 off)
-{
- bcm_writel(val, priv->base + off);
-}
-
-/*
- * io helpers to access shared registers
- */
-static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
-{
- return bcm_readl(bcm_enet_shared_base + off);
-}
-
-static inline void enet_dma_writel(struct bcm_enet_priv *priv,
- u32 val, u32 off)
-{
- bcm_writel(val, bcm_enet_shared_base + off);
-}
-
-/*
- * write given data into mii register and wait for transfer to end
- * with timeout (average measured transfer time is 25us)
- */
-static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
-{
- int limit;
-
- /* make sure mii interrupt status is cleared */
- enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
-
- enet_writel(priv, data, ENET_MIIDATA_REG);
- wmb();
-
- /* busy wait on mii interrupt bit, with timeout */
- limit = 1000;
- do {
- if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
- break;
- udelay(1);
- } while (limit-- >= 0);
-
- return (limit < 0) ? 1 : 0;
-}
-
-/*
- * MII internal read callback
- */
-static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
- int regnum)
-{
- u32 tmp, val;
-
- tmp = regnum << ENET_MIIDATA_REG_SHIFT;
- tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
- tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
- tmp |= ENET_MIIDATA_OP_READ_MASK;
-
- if (do_mdio_op(priv, tmp))
- return -1;
-
- val = enet_readl(priv, ENET_MIIDATA_REG);
- val &= 0xffff;
- return val;
-}
-
-/*
- * MII internal write callback
- */
-static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
- int regnum, u16 value)
-{
- u32 tmp;
-
- tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
- tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
- tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
- tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
- tmp |= ENET_MIIDATA_OP_WRITE_MASK;
-
- (void)do_mdio_op(priv, tmp);
- return 0;
-}
-
-/*
- * MII read callback from phylib
- */
-static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
- int regnum)
-{
- return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
-}
-
-/*
- * MII write callback from phylib
- */
-static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
- int regnum, u16 value)
-{
- return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
-}
-
-/*
- * MII read callback from mii core
- */
-static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
- int regnum)
-{
- return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
-}
-
-/*
- * MII write callback from mii core
- */
-static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
- int regnum, int value)
-{
- bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
-}
-
-/*
- * refill rx queue
- */
-static int bcm_enet_refill_rx(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
-
- while (priv->rx_desc_count < priv->rx_ring_size) {
- struct bcm_enet_desc *desc;
- struct sk_buff *skb;
- dma_addr_t p;
- int desc_idx;
- u32 len_stat;
-
- desc_idx = priv->rx_dirty_desc;
- desc = &priv->rx_desc_cpu[desc_idx];
-
- if (!priv->rx_skb[desc_idx]) {
- skb = netdev_alloc_skb(dev, priv->rx_skb_size);
- if (!skb)
- break;
- priv->rx_skb[desc_idx] = skb;
-
- p = dma_map_single(&priv->pdev->dev, skb->data,
- priv->rx_skb_size,
- DMA_FROM_DEVICE);
- desc->address = p;
- }
-
- len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
- len_stat |= DMADESC_OWNER_MASK;
- if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
- len_stat |= DMADESC_WRAP_MASK;
- priv->rx_dirty_desc = 0;
- } else {
- priv->rx_dirty_desc++;
- }
- wmb();
- desc->len_stat = len_stat;
-
- priv->rx_desc_count++;
-
- /* tell dma engine we allocated one buffer */
- enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
- }
-
- /* If rx ring is still empty, set a timer to try allocating
- * again at a later time. */
- if (priv->rx_desc_count == 0 && netif_running(dev)) {
- dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
- priv->rx_timeout.expires = jiffies + HZ;
- add_timer(&priv->rx_timeout);
- }
-
- return 0;
-}
-
-/*
- * timer callback to defer refill rx queue in case we're OOM
- */
-static void bcm_enet_refill_rx_timer(unsigned long data)
-{
- struct net_device *dev;
- struct bcm_enet_priv *priv;
-
- dev = (struct net_device *)data;
- priv = netdev_priv(dev);
-
- spin_lock(&priv->rx_lock);
- bcm_enet_refill_rx((struct net_device *)data);
- spin_unlock(&priv->rx_lock);
-}
-
-/*
- * extract packet from rx queue
- */
-static int bcm_enet_receive_queue(struct net_device *dev, int budget)
-{
- struct bcm_enet_priv *priv;
- struct device *kdev;
- int processed;
-
- priv = netdev_priv(dev);
- kdev = &priv->pdev->dev;
- processed = 0;
-
- /* don't scan ring further than number of refilled
- * descriptor */
- if (budget > priv->rx_desc_count)
- budget = priv->rx_desc_count;
-
- do {
- struct bcm_enet_desc *desc;
- struct sk_buff *skb;
- int desc_idx;
- u32 len_stat;
- unsigned int len;
-
- desc_idx = priv->rx_curr_desc;
- desc = &priv->rx_desc_cpu[desc_idx];
-
- /* make sure we actually read the descriptor status at
- * each loop */
- rmb();
-
- len_stat = desc->len_stat;
-
- /* break if dma ownership belongs to hw */
- if (len_stat & DMADESC_OWNER_MASK)
- break;
-
- processed++;
- priv->rx_curr_desc++;
- if (priv->rx_curr_desc == priv->rx_ring_size)
- priv->rx_curr_desc = 0;
- priv->rx_desc_count--;
-
- /* if the packet does not have start of packet _and_
- * end of packet flag set, then just recycle it */
- if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
- priv->stats.rx_dropped++;
- continue;
- }
-
- /* recycle packet if it's marked as bad */
- if (unlikely(len_stat & DMADESC_ERR_MASK)) {
- priv->stats.rx_errors++;
-
- if (len_stat & DMADESC_OVSIZE_MASK)
- priv->stats.rx_length_errors++;
- if (len_stat & DMADESC_CRC_MASK)
- priv->stats.rx_crc_errors++;
- if (len_stat & DMADESC_UNDER_MASK)
- priv->stats.rx_frame_errors++;
- if (len_stat & DMADESC_OV_MASK)
- priv->stats.rx_fifo_errors++;
- continue;
- }
-
- /* valid packet */
- skb = priv->rx_skb[desc_idx];
- len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
- /* don't include FCS */
- len -= 4;
-
- if (len < copybreak) {
- struct sk_buff *nskb;
-
- nskb = netdev_alloc_skb(dev, len + 2);
- if (!nskb) {
- /* forget packet, just rearm desc */
- priv->stats.rx_dropped++;
- continue;
- }
-
- /* since we're copying the data, we can align
- * them properly */
- skb_reserve(nskb, NET_IP_ALIGN);
- dma_sync_single_for_cpu(kdev, desc->address,
- len, DMA_FROM_DEVICE);
- memcpy(nskb->data, skb->data, len);
- dma_sync_single_for_device(kdev, desc->address,
- len, DMA_FROM_DEVICE);
- skb = nskb;
- } else {
- dma_unmap_single(&priv->pdev->dev, desc->address,
- priv->rx_skb_size, DMA_FROM_DEVICE);
- priv->rx_skb[desc_idx] = NULL;
- }
-
- skb_put(skb, len);
- skb->dev = dev;
- skb->protocol = eth_type_trans(skb, dev);
- priv->stats.rx_packets++;
- priv->stats.rx_bytes += len;
- dev->last_rx = jiffies;
- netif_receive_skb(skb);
-
- } while (--budget > 0);
-
- if (processed || !priv->rx_desc_count) {
- bcm_enet_refill_rx(dev);
-
- /* kick rx dma */
- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
- ENETDMA_CHANCFG_REG(priv->rx_chan));
- }
-
- return processed;
-}
-
-
-/*
- * try to or force reclaim of transmitted buffers
- */
-static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
-{
- struct bcm_enet_priv *priv;
- int released;
-
- priv = netdev_priv(dev);
- released = 0;
-
- while (priv->tx_desc_count < priv->tx_ring_size) {
- struct bcm_enet_desc *desc;
- struct sk_buff *skb;
-
- /* We run in a bh and fight against start_xmit, which
- * is called with bh disabled */
- spin_lock(&priv->tx_lock);
-
- desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
-
- if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
- spin_unlock(&priv->tx_lock);
- break;
- }
-
- /* ensure other field of the descriptor were not read
- * before we checked ownership */
- rmb();
-
- skb = priv->tx_skb[priv->tx_dirty_desc];
- priv->tx_skb[priv->tx_dirty_desc] = NULL;
- dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
- DMA_TO_DEVICE);
-
- priv->tx_dirty_desc++;
- if (priv->tx_dirty_desc == priv->tx_ring_size)
- priv->tx_dirty_desc = 0;
- priv->tx_desc_count++;
-
- spin_unlock(&priv->tx_lock);
-
- if (desc->len_stat & DMADESC_UNDER_MASK)
- priv->stats.tx_errors++;
-
- dev_kfree_skb(skb);
- released++;
- }
-
- if (netif_queue_stopped(dev) && released)
- netif_wake_queue(dev);
-
- return released;
-}
-
-/*
- * poll func, called by network core
- */
-static int bcm_enet_poll(struct napi_struct *napi, int budget)
-{
- struct bcm_enet_priv *priv;
- struct net_device *dev;
- int tx_work_done, rx_work_done;
-
- priv = container_of(napi, struct bcm_enet_priv, napi);
- dev = priv->net_dev;
-
- /* ack interrupts */
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IR_REG(priv->rx_chan));
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IR_REG(priv->tx_chan));
-
- /* reclaim sent skb */
- tx_work_done = bcm_enet_tx_reclaim(dev, 0);
-
- spin_lock(&priv->rx_lock);
- rx_work_done = bcm_enet_receive_queue(dev, budget);
- spin_unlock(&priv->rx_lock);
-
- if (rx_work_done >= budget || tx_work_done > 0) {
- /* rx/tx queue is not yet empty/clean */
- return rx_work_done;
- }
-
- /* no more packet in rx/tx queue, remove device from poll
- * queue */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
- netif_rx_complete(dev, napi);
-#else
- napi_complete(napi);
-#endif
-
- /* restore rx/tx interrupt */
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IRMASK_REG(priv->rx_chan));
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IRMASK_REG(priv->tx_chan));
-
- return rx_work_done;
-}
-
-/*
- * mac interrupt handler
- */
-static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
-{
- struct net_device *dev;
- struct bcm_enet_priv *priv;
- u32 stat;
-
- dev = dev_id;
- priv = netdev_priv(dev);
-
- stat = enet_readl(priv, ENET_IR_REG);
- if (!(stat & ENET_IR_MIB))
- return IRQ_NONE;
-
- /* clear & mask interrupt */
- enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
- enet_writel(priv, 0, ENET_IRMASK_REG);
-
- /* read mib registers in workqueue */
- schedule_work(&priv->mib_update_task);
-
- return IRQ_HANDLED;
-}
-
-/*
- * rx/tx dma interrupt handler
- */
-static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
-{
- struct net_device *dev;
- struct bcm_enet_priv *priv;
-
- dev = dev_id;
- priv = netdev_priv(dev);
-
- /* mask rx/tx interrupts */
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
- netif_rx_schedule(dev, &priv->napi);
-#else
- napi_schedule(&priv->napi);
-#endif
-
- return IRQ_HANDLED;
-}
-
-/*
- * tx request callback
- */
-static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
- struct bcm_enet_desc *desc;
- u32 len_stat;
- int ret;
-
- priv = netdev_priv(dev);
-
- /* lock against tx reclaim */
- spin_lock(&priv->tx_lock);
-
- /* make sure the tx hw queue is not full, should not happen
- * since we stop queue before it's the case */
- if (unlikely(!priv->tx_desc_count)) {
- netif_stop_queue(dev);
- dev_err(&priv->pdev->dev, "xmit called with no tx desc "
- "available?\n");
- ret = NETDEV_TX_BUSY;
- goto out_unlock;
- }
-
- /* point to the next available desc */
- desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
- priv->tx_skb[priv->tx_curr_desc] = skb;
-
- /* fill descriptor */
- desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
- DMA_TO_DEVICE);
-
- len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
- len_stat |= DMADESC_ESOP_MASK |
- DMADESC_APPEND_CRC |
- DMADESC_OWNER_MASK;
-
- priv->tx_curr_desc++;
- if (priv->tx_curr_desc == priv->tx_ring_size) {
- priv->tx_curr_desc = 0;
- len_stat |= DMADESC_WRAP_MASK;
- }
- priv->tx_desc_count--;
-
- /* dma might be already polling, make sure we update desc
- * fields in correct order */
- wmb();
- desc->len_stat = len_stat;
- wmb();
-
- /* kick tx dma */
- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
- ENETDMA_CHANCFG_REG(priv->tx_chan));
-
- /* stop queue if no more desc available */
- if (!priv->tx_desc_count)
- netif_stop_queue(dev);
-
- priv->stats.tx_bytes += skb->len;
- priv->stats.tx_packets++;
- dev->trans_start = jiffies;
- ret = NETDEV_TX_OK;
-
-out_unlock:
- spin_unlock(&priv->tx_lock);
- return ret;
-}
-
-/*
- * Change the interface's mac address.
- */
-static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
-{
- struct bcm_enet_priv *priv;
- struct sockaddr *addr = p;
- u32 val;
-
- priv = netdev_priv(dev);
- memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
-
- /* use perfect match register 0 to store my mac address */
- val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
- (dev->dev_addr[4] << 8) | dev->dev_addr[5];
- enet_writel(priv, val, ENET_PML_REG(0));
-
- val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
- val |= ENET_PMH_DATAVALID_MASK;
- enet_writel(priv, val, ENET_PMH_REG(0));
-
- return 0;
-}
-
-/*
- * Change rx mode (promiscous/allmulti) and update multicast list
- */
-static void bcm_enet_set_multicast_list(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
- struct dev_mc_list *mc_list;
- u32 val;
- int i;
-
- priv = netdev_priv(dev);
-
- val = enet_readl(priv, ENET_RXCFG_REG);
-
- if (dev->flags & IFF_PROMISC)
- val |= ENET_RXCFG_PROMISC_MASK;
- else
- val &= ~ENET_RXCFG_PROMISC_MASK;
-
- /* only 3 perfect match registers left, first one is used for
- * own mac address */
- if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > 3)
- val |= ENET_RXCFG_ALLMCAST_MASK;
- else
- val &= ~ENET_RXCFG_ALLMCAST_MASK;
-
- /* no need to set perfect match registers if we catch all
- * multicast */
- if (val & ENET_RXCFG_ALLMCAST_MASK) {
- enet_writel(priv, val, ENET_RXCFG_REG);
- return;
- }
-
- for (i = 0, mc_list = dev->mc_list;
- (mc_list != NULL) && (i < dev->mc_count) && (i < 3);
- i++, mc_list = mc_list->next) {
- u8 *dmi_addr;
- u32 tmp;
-
- /* filter non ethernet address */
- if (mc_list->dmi_addrlen != 6)
- continue;
-
- /* update perfect match registers */
- dmi_addr = mc_list->dmi_addr;
- tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
- (dmi_addr[4] << 8) | dmi_addr[5];
- enet_writel(priv, tmp, ENET_PML_REG(i + 1));
-
- tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
- tmp |= ENET_PMH_DATAVALID_MASK;
- enet_writel(priv, tmp, ENET_PMH_REG(i + 1));
- }
-
- for (; i < 3; i++) {
- enet_writel(priv, 0, ENET_PML_REG(i + 1));
- enet_writel(priv, 0, ENET_PMH_REG(i + 1));
- }
-
- enet_writel(priv, val, ENET_RXCFG_REG);
-}
-
-/*
- * set mac duplex parameters
- */
-static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
-{
- u32 val;
-
- val = enet_readl(priv, ENET_TXCTL_REG);
- if (fullduplex)
- val |= ENET_TXCTL_FD_MASK;
- else
- val &= ~ENET_TXCTL_FD_MASK;
- enet_writel(priv, val, ENET_TXCTL_REG);
-}
-
-/*
- * set mac flow control parameters
- */
-static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
-{
- u32 val;
-
- /* rx flow control (pause frame handling) */
- val = enet_readl(priv, ENET_RXCFG_REG);
- if (rx_en)
- val |= ENET_RXCFG_ENFLOW_MASK;
- else
- val &= ~ENET_RXCFG_ENFLOW_MASK;
- enet_writel(priv, val, ENET_RXCFG_REG);
-
- /* tx flow control (pause frame generation) */
- val = enet_dma_readl(priv, ENETDMA_CFG_REG);
- if (tx_en)
- val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
- else
- val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
- enet_dma_writel(priv, val, ENETDMA_CFG_REG);
-}
-
-/*
- * link changed callback (from phylib)
- */
-static void bcm_enet_adjust_phy_link(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
- struct phy_device *phydev;
- int status_changed;
-
- priv = netdev_priv(dev);
- phydev = priv->phydev;
- status_changed = 0;
-
- if (priv->old_link != phydev->link) {
- status_changed = 1;
- priv->old_link = phydev->link;
- }
-
- /* reflect duplex change in mac configuration */
- if (phydev->link && phydev->duplex != priv->old_duplex) {
- bcm_enet_set_duplex(priv,
- (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
- status_changed = 1;
- priv->old_duplex = phydev->duplex;
- }
-
- /* enable flow control if remote advertise it (trust phylib to
- * check that duplex is full */
- if (phydev->link && phydev->pause != priv->old_pause) {
- int rx_pause_en, tx_pause_en;
-
- if (phydev->pause) {
- /* pause was advertised by lpa and us */
- rx_pause_en = 1;
- tx_pause_en = 1;
- } else if (!priv->pause_auto) {
- /* pause setting overrided by user */
- rx_pause_en = priv->pause_rx;
- tx_pause_en = priv->pause_tx;
- } else {
- rx_pause_en = 0;
- tx_pause_en = 0;
- }
-
- bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
- status_changed = 1;
- priv->old_pause = phydev->pause;
- }
-
- if (status_changed) {
- pr_info("%s: link %s", dev->name, phydev->link ?
- "UP" : "DOWN");
- if (phydev->link)
- printk(" - %d/%s - flow control %s", phydev->speed,
- DUPLEX_FULL == phydev->duplex ? "full" : "half",
- phydev->pause == 1 ? "rx&tx" : "off");
-
- printk("\n");
- }
-}
-
-/*
- * link changed callback (if phylib is not used)
- */
-static void bcm_enet_adjust_link(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
- bcm_enet_set_duplex(priv, priv->force_duplex_full);
- bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
-
- pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
- dev->name,
- priv->force_speed_100 ? 100 : 10,
- priv->force_duplex_full ? "full" : "half",
- priv->pause_rx ? "rx" : "off",
- priv->pause_tx ? "tx" : "off");
-}
-
-/*
- * open callback, allocate dma rings & buffers and start rx operation
- */
-static int bcm_enet_open(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
- struct sockaddr addr;
- struct device *kdev;
- struct phy_device *phydev;
- int irq_requested, i, ret;
- unsigned int size;
- char phy_id[BUS_ID_SIZE];
- void *p;
- u32 val;
-
- priv = netdev_priv(dev);
- priv->rx_desc_cpu = priv->tx_desc_cpu = NULL;
- priv->rx_skb = priv->tx_skb = NULL;
-
- kdev = &priv->pdev->dev;
-
- if (priv->has_phy) {
- /* connect to PHY */
- snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT,
- priv->mac_id ? "1" : "0", priv->phy_id);
-
- phydev = phy_connect(dev, phy_id, &bcm_enet_adjust_phy_link, 0,
- PHY_INTERFACE_MODE_MII);
-
- if (IS_ERR(phydev)) {
- dev_err(kdev, "could not attach to PHY\n");
- 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_MII);
- phydev->advertising = phydev->supported;
-
- if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
- phydev->advertising |= SUPPORTED_Pause;
- else
- phydev->advertising &= ~SUPPORTED_Pause;
-
- dev_info(kdev, "attached PHY at address %d [%s]\n",
- phydev->addr, phydev->drv->name);
-
- priv->old_link = 0;
- priv->old_duplex = -1;
- priv->old_pause = -1;
- priv->phydev = phydev;
- }
-
- /* mask all interrupts and request them */
- enet_writel(priv, 0, ENET_IRMASK_REG);
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-
- irq_requested = 0;
- ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
- if (ret)
- goto out;
- irq_requested++;
-
- ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
- IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev);
- if (ret)
- goto out;
- irq_requested++;
-
- ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
- IRQF_DISABLED, dev->name, dev);
- if (ret)
- goto out;
- irq_requested++;
-
- /* initialize perfect match registers */
- for (i = 0; i < 4; i++) {
- enet_writel(priv, 0, ENET_PML_REG(i));
- enet_writel(priv, 0, ENET_PMH_REG(i));
- }
-
- /* write device mac address */
- memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
- bcm_enet_set_mac_address(dev, &addr);
-
- /* allocate rx dma ring */
- size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
- p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
- if (!p) {
- dev_err(kdev, "cannot allocate rx ring %u\n", size);
- ret = -ENOMEM;
- goto out;
- }
-
- memset(p, 0, size);
- priv->rx_desc_alloc_size = size;
- priv->rx_desc_cpu = p;
-
- /* allocate tx dma ring */
- size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
- p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
- if (!p) {
- dev_err(kdev, "cannot allocate tx ring\n");
- ret = -ENOMEM;
- goto out;
- }
-
- memset(p, 0, size);
- priv->tx_desc_alloc_size = size;
- priv->tx_desc_cpu = p;
-
- priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
- GFP_KERNEL);
- if (!priv->tx_skb) {
- dev_err(kdev, "cannot allocate rx skb queue\n");
- ret = -ENOMEM;
- goto out;
- }
-
- priv->tx_desc_count = priv->tx_ring_size;
- priv->tx_dirty_desc = 0;
- priv->tx_curr_desc = 0;
- spin_lock_init(&priv->tx_lock);
-
- /* init & fill rx ring with skbs */
- priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
- GFP_KERNEL);
- if (!priv->rx_skb) {
- dev_err(kdev, "cannot allocate rx skb queue\n");
- ret = -ENOMEM;
- goto out;
- }
-
- priv->rx_desc_count = 0;
- priv->rx_dirty_desc = 0;
- priv->rx_curr_desc = 0;
-
- /* initialize flow control buffer allocation */
- enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
- ENETDMA_BUFALLOC_REG(priv->rx_chan));
-
- if (bcm_enet_refill_rx(dev)) {
- dev_err(kdev, "cannot allocate rx skb queue\n");
- ret = -ENOMEM;
- goto out;
- }
-
- /* write rx & tx ring addresses */
- enet_dma_writel(priv, priv->rx_desc_dma,
- ENETDMA_RSTART_REG(priv->rx_chan));
- enet_dma_writel(priv, priv->tx_desc_dma,
- ENETDMA_RSTART_REG(priv->tx_chan));
-
- /* clear remaining state ram for rx & tx channel */
- enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
- enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
- enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
-
- /* set max rx/tx length */
- enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
- enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
-
- /* set dma maximum burst len */
- enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
- ENETDMA_MAXBURST_REG(priv->rx_chan));
- enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
- ENETDMA_MAXBURST_REG(priv->tx_chan));
-
- /* set correct transmit fifo watermark */
- enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
-
- /* set flow control low/high threshold to 1/3 / 2/3 */
- val = priv->rx_ring_size / 3;
- enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
- val = (priv->rx_ring_size * 2) / 3;
- enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
-
- /* all set, enable mac and interrupts, start dma engine and
- * kick rx dma channel */
- wmb();
- enet_writel(priv, ENET_CTL_ENABLE_MASK, ENET_CTL_REG);
- enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
- enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
- ENETDMA_CHANCFG_REG(priv->rx_chan));
-
- /* watch "mib counters about to overflow" interrupt */
- enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
- enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
-
- /* watch "packet transferred" interrupt in rx and tx */
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IR_REG(priv->rx_chan));
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IR_REG(priv->tx_chan));
-
- /* make sure we enable napi before rx interrupt */
- napi_enable(&priv->napi);
-
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IRMASK_REG(priv->rx_chan));
- enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
- ENETDMA_IRMASK_REG(priv->tx_chan));
-
- if (priv->has_phy)
- phy_start(priv->phydev);
- else
- bcm_enet_adjust_link(dev);
-
- netif_start_queue(dev);
- return 0;
-
-out:
- phy_disconnect(priv->phydev);
- if (irq_requested > 2)
- free_irq(priv->irq_tx, dev);
- if (irq_requested > 1)
- free_irq(priv->irq_rx, dev);
- if (irq_requested > 0)
- free_irq(dev->irq, dev);
- for (i = 0; i < priv->rx_ring_size; i++) {
- struct bcm_enet_desc *desc;
-
- if (!priv->rx_skb[i])
- continue;
-
- desc = &priv->rx_desc_cpu[i];
- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
- DMA_FROM_DEVICE);
- kfree_skb(priv->rx_skb[i]);
- }
- if (priv->rx_desc_cpu)
- dma_free_coherent(kdev, priv->rx_desc_alloc_size,
- priv->rx_desc_cpu, priv->rx_desc_dma);
- if (priv->tx_desc_cpu)
- dma_free_coherent(kdev, priv->tx_desc_alloc_size,
- priv->tx_desc_cpu, priv->tx_desc_dma);
- kfree(priv->rx_skb);
- kfree(priv->tx_skb);
- return ret;
-}
-
-/*
- * disable mac
- */
-static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
-{
- int limit;
- u32 val;
-
- val = enet_readl(priv, ENET_CTL_REG);
- val |= ENET_CTL_DISABLE_MASK;
- enet_writel(priv, val, ENET_CTL_REG);
-
- limit = 1000;
- do {
- u32 val;
-
- val = enet_readl(priv, ENET_CTL_REG);
- if (!(val & ENET_CTL_DISABLE_MASK))
- break;
- udelay(1);
- } while (limit--);
-}
-
-/*
- * disable dma in given channel
- */
-static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
-{
- int limit;
-
- enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
-
- limit = 1000;
- do {
- u32 val;
-
- val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
- if (!(val & ENETDMA_CHANCFG_EN_MASK))
- break;
- udelay(1);
- } while (limit--);
-}
-
-/*
- * stop callback
- */
-static int bcm_enet_stop(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
- struct device *kdev;
- int i;
-
- priv = netdev_priv(dev);
- kdev = &priv->pdev->dev;
-
- netif_stop_queue(dev);
- napi_disable(&priv->napi);
- if (priv->has_phy)
- phy_stop(priv->phydev);
- del_timer_sync(&priv->rx_timeout);
-
- /* mask all interrupts */
- enet_writel(priv, 0, ENET_IRMASK_REG);
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
- enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
-
- /* make sure no mib update is scheduled */
- flush_scheduled_work();
-
- /* disable dma & mac */
- bcm_enet_disable_dma(priv, priv->tx_chan);
- bcm_enet_disable_dma(priv, priv->rx_chan);
- bcm_enet_disable_mac(priv);
-
- /* force reclaim of all tx buffers */
- bcm_enet_tx_reclaim(dev, 1);
-
- /* free the rx skb ring */
- for (i = 0; i < priv->rx_ring_size; i++) {
- struct bcm_enet_desc *desc;
-
- if (!priv->rx_skb[i])
- continue;
-
- desc = &priv->rx_desc_cpu[i];
- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
- DMA_FROM_DEVICE);
- kfree_skb(priv->rx_skb[i]);
- }
-
- /* free remaining allocated memory */
- kfree(priv->rx_skb);
- kfree(priv->tx_skb);
- dma_free_coherent(kdev, priv->rx_desc_alloc_size,
- priv->rx_desc_cpu, priv->rx_desc_dma);
- dma_free_coherent(kdev, priv->tx_desc_alloc_size,
- priv->tx_desc_cpu, priv->tx_desc_dma);
- free_irq(priv->irq_tx, dev);
- free_irq(priv->irq_rx, dev);
- free_irq(dev->irq, dev);
-
- /* release phy */
- if (priv->has_phy) {
- phy_disconnect(priv->phydev);
- priv->phydev = NULL;
- }
-
- return 0;
-}
-
-/*
- * core request to return device rx/tx stats
- */
-static struct net_device_stats *bcm_enet_get_stats(struct net_device *dev)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
- return &priv->stats;
-}
-
-/*
- * ethtool callbacks
- */
-struct bcm_enet_stats {
- char stat_string[ETH_GSTRING_LEN];
- int sizeof_stat;
- int stat_offset;
- int mib_reg;
-};
-
-#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
- offsetof(struct bcm_enet_priv, m)
-
-static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
- { "rx_packets", GEN_STAT(stats.rx_packets), -1 },
- { "tx_packets", GEN_STAT(stats.tx_packets), -1 },
- { "rx_bytes", GEN_STAT(stats.rx_bytes), -1 },
- { "tx_bytes", GEN_STAT(stats.tx_bytes), -1 },
- { "rx_errors", GEN_STAT(stats.rx_errors), -1 },
- { "tx_errors", GEN_STAT(stats.tx_errors), -1 },
- { "rx_dropped", GEN_STAT(stats.rx_dropped), -1 },
- { "tx_dropped", GEN_STAT(stats.tx_dropped), -1 },
-
- { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
- { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
- { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
- { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
- { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
- { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
- { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
- { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
- { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
- { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
- { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
- { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
- { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
- { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
- { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
- { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
- { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
- { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
- { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
- { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
- { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
-
- { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
- { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
- { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
- { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
- { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
- { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
- { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
- { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
- { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
- { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
- { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
- { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
- { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
- { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
- { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
- { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
- { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
- { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
- { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
- { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
- { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
- { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
-
-};
-
-#define BCM_ENET_STATS_LEN \
- (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
-
-static const u32 unused_mib_regs[] = {
- ETH_MIB_TX_ALL_OCTETS,
- ETH_MIB_TX_ALL_PKTS,
- ETH_MIB_RX_ALL_OCTETS,
- ETH_MIB_RX_ALL_PKTS,
-};
-
-
-static void bcm_enet_get_drvinfo(struct net_device *netdev,
- struct ethtool_drvinfo *drvinfo)
-{
- strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
- strncpy(drvinfo->version, bcm_enet_driver_version, 32);
- strncpy(drvinfo->fw_version, "N/A", 32);
- strncpy(drvinfo->bus_info, "bcm63xx", 32);
- drvinfo->n_stats = BCM_ENET_STATS_LEN;
-}
-
-static int bcm_enet_get_stats_count(struct net_device *netdev)
-{
- return BCM_ENET_STATS_LEN;
-}
-
-static void bcm_enet_get_strings(struct net_device *netdev,
- u32 stringset, u8 *data)
-{
- int i;
-
- switch (stringset) {
- case ETH_SS_STATS:
- for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
- memcpy(data + i * ETH_GSTRING_LEN,
- bcm_enet_gstrings_stats[i].stat_string,
- ETH_GSTRING_LEN);
- }
- break;
- }
-}
-
-static void update_mib_counters(struct bcm_enet_priv *priv)
-{
- int i;
-
- for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
- const struct bcm_enet_stats *s;
- u32 val;
- char *p;
-
- s = &bcm_enet_gstrings_stats[i];
- if (s->mib_reg == -1)
- continue;
-
- val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
- p = (char *)priv + s->stat_offset;
-
- if (s->sizeof_stat == sizeof(u64))
- *(u64 *)p += val;
- else
- *(u32 *)p += val;
- }
-
- /* also empty unused mib counters to make sure mib counter
- * overflow interrupt is cleared */
- for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
- (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
-}
-
-static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
-{
- struct bcm_enet_priv *priv;
-
- priv = container_of(t, struct bcm_enet_priv, mib_update_task);
- mutex_lock(&priv->mib_update_lock);
- update_mib_counters(priv);
- mutex_unlock(&priv->mib_update_lock);
-
- /* reenable mib interrupt */
- if (netif_running(priv->net_dev))
- enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
-}
-
-static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
- struct ethtool_stats *stats,
- u64 *data)
-{
- struct bcm_enet_priv *priv;
- int i;
-
- priv = netdev_priv(netdev);
-
- mutex_lock(&priv->mib_update_lock);
- update_mib_counters(priv);
-
- for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
- const struct bcm_enet_stats *s;
- char *p;
-
- s = &bcm_enet_gstrings_stats[i];
- p = (char *)priv + s->stat_offset;
- data[i] = (s->sizeof_stat == sizeof(u64)) ?
- *(u64 *)p : *(u32 *)p;
- }
- mutex_unlock(&priv->mib_update_lock);
-}
-
-static int bcm_enet_get_settings(struct net_device *dev,
- struct ethtool_cmd *cmd)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
-
- cmd->maxrxpkt = 0;
- cmd->maxtxpkt = 0;
-
- if (priv->has_phy) {
- if (!priv->phydev)
- return -ENODEV;
- return phy_ethtool_gset(priv->phydev, cmd);
- } else {
- cmd->autoneg = 0;
- cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
- cmd->duplex = (priv->force_duplex_full) ?
- DUPLEX_FULL : DUPLEX_HALF;
- cmd->supported = ADVERTISED_10baseT_Half |
- ADVERTISED_10baseT_Full |
- ADVERTISED_100baseT_Half |
- ADVERTISED_100baseT_Full;
- cmd->advertising = 0;
- cmd->port = PORT_MII;
- cmd->transceiver = XCVR_EXTERNAL;
- }
- return 0;
-}
-
-static int bcm_enet_set_settings(struct net_device *dev,
- struct ethtool_cmd *cmd)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
- if (priv->has_phy) {
- if (!priv->phydev)
- return -ENODEV;
- return phy_ethtool_sset(priv->phydev, cmd);
- } else {
-
- if (cmd->autoneg ||
- (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
- cmd->port != PORT_MII)
- return -EINVAL;
-
- priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
- priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
-
- if (netif_running(dev))
- bcm_enet_adjust_link(dev);
- return 0;
- }
-}
-
-static void bcm_enet_get_ringparam(struct net_device *dev,
- struct ethtool_ringparam *ering)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
-
- /* rx/tx ring is actually only limited by memory */
- ering->rx_max_pending = 8192;
- ering->tx_max_pending = 8192;
- ering->rx_mini_max_pending = 0;
- ering->rx_jumbo_max_pending = 0;
- ering->rx_pending = priv->rx_ring_size;
- ering->tx_pending = priv->tx_ring_size;
-}
-
-static int bcm_enet_set_ringparam(struct net_device *dev,
- struct ethtool_ringparam *ering)
-{
- struct bcm_enet_priv *priv;
- int was_running;
-
- priv = netdev_priv(dev);
-
- was_running = 0;
- if (netif_running(dev)) {
- bcm_enet_stop(dev);
- was_running = 1;
- }
-
- priv->rx_ring_size = ering->rx_pending;
- priv->tx_ring_size = ering->tx_pending;
-
- if (was_running) {
- int err;
-
- err = bcm_enet_open(dev);
- if (err)
- dev_close(dev);
- else
- bcm_enet_set_multicast_list(dev);
- }
- return 0;
-}
-
-static void bcm_enet_get_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *ecmd)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
- ecmd->autoneg = priv->pause_auto;
- ecmd->rx_pause = priv->pause_rx;
- ecmd->tx_pause = priv->pause_tx;
-}
-
-static int bcm_enet_set_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *ecmd)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
-
- if (priv->has_phy) {
- if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
- /* asymetric pause mode not supported,
- * actually possible but integrated PHY has RO
- * asym_pause bit */
- return -EINVAL;
- }
- } else {
- /* no pause autoneg on direct mii connection */
- if (ecmd->autoneg)
- return -EINVAL;
- }
-
- priv->pause_auto = ecmd->autoneg;
- priv->pause_rx = ecmd->rx_pause;
- priv->pause_tx = ecmd->tx_pause;
-
- return 0;
-}
-
-static struct ethtool_ops bcm_enet_ethtool_ops = {
- .get_strings = bcm_enet_get_strings,
- .get_stats_count = bcm_enet_get_stats_count,
- .get_ethtool_stats = bcm_enet_get_ethtool_stats,
- .get_settings = bcm_enet_get_settings,
- .set_settings = bcm_enet_set_settings,
- .get_drvinfo = bcm_enet_get_drvinfo,
- .get_link = ethtool_op_get_link,
- .get_ringparam = bcm_enet_get_ringparam,
- .set_ringparam = bcm_enet_set_ringparam,
- .get_pauseparam = bcm_enet_get_pauseparam,
- .set_pauseparam = bcm_enet_set_pauseparam,
-};
-
-static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- struct bcm_enet_priv *priv;
-
- priv = netdev_priv(dev);
- if (priv->has_phy) {
- if (!priv->phydev)
- return -ENODEV;
- return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
- } else {
- struct mii_if_info mii;
-
- mii.dev = dev;
- mii.mdio_read = bcm_enet_mdio_read_mii;
- mii.mdio_write = bcm_enet_mdio_write_mii;
- mii.phy_id = 0;
- mii.phy_id_mask = 0x3f;
- mii.reg_num_mask = 0x1f;
- return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
- }
-}
-
-/*
- * calculate actual hardware mtu
- */
-static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
-{
- int actual_mtu;
-
- actual_mtu = mtu;
-
- /* add ethernet header + vlan tag size */
- actual_mtu += VLAN_ETH_HLEN;
-
- if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
- return -EINVAL;
-
- /*
- * setup maximum size before we get overflow mark in
- * descriptor, note that this will not prevent reception of
- * big frames, they will be split into multiple buffers
- * anyway
- */
- priv->hw_mtu = actual_mtu;
-
- /*
- * align rx buffer size to dma burst len, account FCS since
- * it's appended
- */
- priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
- BCMENET_DMA_MAXBURST * 4);
- return 0;
-}
-
-/*
- * adjust mtu, can't be called while device is running
- */
-static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
-{
- int ret;
-
- if (netif_running(dev))
- return -EBUSY;
-
- ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
- if (ret)
- return ret;
- dev->mtu = new_mtu;
- return 0;
-}
-
-/*
- * preinit hardware to allow mii operation while device is down
- */
-static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
-{
- u32 val;
- int limit;
-
- /* make sure mac is disabled */
- bcm_enet_disable_mac(priv);
-
- /* soft reset mac */
- val = ENET_CTL_SRESET_MASK;
- enet_writel(priv, val, ENET_CTL_REG);
- wmb();
-
- limit = 1000;
- do {
- val = enet_readl(priv, ENET_CTL_REG);
- if (!(val & ENET_CTL_SRESET_MASK))
- break;
- udelay(1);
- } while (limit--);
-
- /* select correct mii interface */
- val = enet_readl(priv, ENET_CTL_REG);
- if (priv->use_external_mii)
- val |= ENET_CTL_EPHYSEL_MASK;
- else
- val &= ~ENET_CTL_EPHYSEL_MASK;
- enet_writel(priv, val, ENET_CTL_REG);
-
- /* turn on mdc clock */
- enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
- ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
-
- /* set mib counters to self-clear when read */
- val = enet_readl(priv, ENET_MIBCTL_REG);
- val |= ENET_MIBCTL_RDCLEAR_MASK;
- enet_writel(priv, val, ENET_MIBCTL_REG);
-}
-
-/*
- * allocate netdevice, request register memory and register device.
- */
-static int __devinit bcm_enet_probe(struct platform_device *pdev)
-{
- struct bcm_enet_priv *priv;
- struct net_device *dev;
- struct bcm63xx_enet_platform_data *pd;
- struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
- struct mii_bus *bus;
- const char *clk_name;
- unsigned int iomem_size;
- int i, ret, mdio_registered, mem_requested;
-
- /* stop if shared driver failed, assume driver->probe will be
- * called in the same order we register devices (correct ?) */
- if (!bcm_enet_shared_base)
- return -ENODEV;
-
- mdio_registered = mem_requested = 0;
-
- res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
- res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
- if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
- return -ENODEV;
-
- ret = 0;
- dev = alloc_etherdev(sizeof(*priv));
- if (!dev)
- return -ENOMEM;
- priv = netdev_priv(dev);
- memset(priv, 0, sizeof(*priv));
-
- ret = compute_hw_mtu(priv, dev->mtu);
- if (ret)
- goto out;
-
- iomem_size = res_mem->end - res_mem->start + 1;
- if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
- ret = -EBUSY;
- goto err;
- }
- mem_requested = 1;
-
- priv->base = ioremap(res_mem->start, iomem_size);
- if (priv->base == NULL) {
- ret = -ENOMEM;
- goto err;
- }
- dev->irq = priv->irq = res_irq->start;
- priv->irq_rx = res_irq_rx->start;
- priv->irq_tx = res_irq_tx->start;
- priv->mac_id = pdev->id;
-
- /* get rx & tx dma channel id for this mac */
- if (priv->mac_id == 0) {
- priv->rx_chan = 0;
- priv->tx_chan = 1;
- clk_name = "enet0";
- } else {
- priv->rx_chan = 2;
- priv->tx_chan = 3;
- clk_name = "enet1";
- }
-
- priv->mac_clk = clk_get(&pdev->dev, clk_name);
- if (IS_ERR(priv->mac_clk)) {
- ret = PTR_ERR(priv->mac_clk);
- priv->mac_clk = NULL;
- goto err;
- }
- clk_enable(priv->mac_clk);
-
- /* initialize default and fetch platform data */
- priv->rx_ring_size = BCMENET_DEF_RX_DESC;
- priv->tx_ring_size = BCMENET_DEF_TX_DESC;
-
- pd = pdev->dev.platform_data;
- if (pd) {
- memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
- priv->has_phy = pd->has_phy;
- priv->phy_id = pd->phy_id;
- priv->has_phy_interrupt = pd->has_phy_interrupt;
- priv->phy_interrupt = pd->phy_interrupt;
- priv->use_external_mii = !pd->use_internal_phy;
- priv->pause_auto = pd->pause_auto;
- priv->pause_rx = pd->pause_rx;
- priv->pause_tx = pd->pause_tx;
- priv->force_duplex_full = pd->force_duplex_full;
- priv->force_speed_100 = pd->force_speed_100;
- }
-
- if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
- /* using internal PHY, enable clock */
- priv->phy_clk = clk_get(&pdev->dev, "ephy");
- if (IS_ERR(priv->phy_clk)) {
- ret = PTR_ERR(priv->phy_clk);
- priv->phy_clk = NULL;
- goto err;
- }
- clk_enable(priv->phy_clk);
- }
-
- /* do minimal hardware init to be able to probe mii bus */
- bcm_enet_hw_preinit(priv);
-
- /* MII bus registration */
- if (priv->has_phy) {
- bus = &priv->mii_bus;
- bus->name = "bcm63xx_enet MII bus";
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
- bus->dev = &pdev->dev;
-#else
- bus->parent = &pdev->dev;
-#endif
- bus->priv = priv;
- bus->read = bcm_enet_mdio_read_phylib;
- bus->write = bcm_enet_mdio_write_phylib;
- sprintf(bus->id, "%d", priv->mac_id);
-
- /* only probe bus where we think the PHY is, because
- * the mdio read operation return 0 instead of 0xffff
- * if a slave is not present on hw */
- bus->phy_mask = ~(1 << priv->phy_id);
-
- bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
- if (!bus->irq) {
- ret = -ENOMEM;
- goto err;
- }
-
- if (priv->has_phy_interrupt)
- bus->irq[priv->phy_id] = priv->phy_interrupt;
- else
- bus->irq[priv->phy_id] = PHY_POLL;
-
- ret = mdiobus_register(bus);
- if (ret) {
- dev_err(&pdev->dev, "unable to register mdio bus\n");
- goto err;
- }
- mdio_registered = 1;
- } else {
-
- /* run platform code to initialize PHY device */
- if (pd->mii_config &&
- pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
- bcm_enet_mdio_write_mii)) {
- dev_err(&pdev->dev, "unable to configure mdio bus\n");
- goto err;
- }
- }
-
- spin_lock_init(&priv->rx_lock);
-
- /* init rx timeout (used for oom) */
- init_timer(&priv->rx_timeout);
- priv->rx_timeout.function = bcm_enet_refill_rx_timer;
- priv->rx_timeout.data = (unsigned long)dev;
-
- /* init the mib update lock&work */
- mutex_init(&priv->mib_update_lock);
- INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
-
- /* zero mib counters */
- for (i = 0; i < ENET_MIB_REG_COUNT; i++)
- enet_writel(priv, 0, ENET_MIB_REG(i));
-
- /* register netdevice */
- dev->open = bcm_enet_open;
- dev->stop = bcm_enet_stop;
- dev->hard_start_xmit = bcm_enet_start_xmit;
- dev->get_stats = bcm_enet_get_stats;
- dev->set_mac_address = bcm_enet_set_mac_address;
- dev->set_multicast_list = bcm_enet_set_multicast_list;
- netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
- dev->do_ioctl = bcm_enet_ioctl;
-#ifdef CONFIG_NET_POLL_CONTROLLER
- dev->poll_controller = bcm_enet_netpoll;
-#endif
- dev->change_mtu = bcm_enet_change_mtu;
-
- SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
- SET_NETDEV_DEV(dev, &pdev->dev);
-
- ret = register_netdev(dev);
- if (ret)
- goto err;
-
- platform_set_drvdata(pdev, dev);
- priv->pdev = pdev;
- priv->net_dev = dev;
-
- return 0;
-
-err:
- if (mem_requested)
- release_mem_region(res_mem->start, iomem_size);
- if (mdio_registered)
- mdiobus_unregister(&priv->mii_bus);
- kfree(priv->mii_bus.irq);
- if (priv->mac_clk) {
- clk_disable(priv->mac_clk);
- clk_put(priv->mac_clk);
- }
- if (priv->phy_clk) {
- clk_disable(priv->phy_clk);
- clk_put(priv->phy_clk);
- }
- if (priv->base) {
- /* turn off mdc clock */
- enet_writel(priv, 0, ENET_MIISC_REG);
- iounmap(priv->base);
- }
-out:
- free_netdev(dev);
- return ret;
-}
-
-
-/*
- * exit func, stops hardware and unregisters netdevice
- */
-static int __devexit bcm_enet_remove(struct platform_device *pdev)
-{
- struct bcm_enet_priv *priv;
- struct net_device *dev;
- struct resource *res;
-
- /* stop netdevice */
- dev = platform_get_drvdata(pdev);
- priv = netdev_priv(dev);
- unregister_netdev(dev);
-
- /* turn off mdc clock */
- enet_writel(priv, 0, ENET_MIISC_REG);
-
- if (priv->has_phy) {
- mdiobus_unregister(&priv->mii_bus);
- kfree(priv->mii_bus.irq);
- } else {
- struct bcm63xx_enet_platform_data *pd;
-
- pd = pdev->dev.platform_data;
- if (pd && pd->mii_config)
- pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
- bcm_enet_mdio_write_mii);
- }
-
- /* release device resources */
- iounmap(priv->base);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, res->end - res->start + 1);
-
- /* disable hw block clocks */
- if (priv->phy_clk) {
- clk_disable(priv->phy_clk);
- clk_put(priv->phy_clk);
- }
- clk_disable(priv->mac_clk);
- clk_put(priv->mac_clk);
-
- platform_set_drvdata(pdev, NULL);
- free_netdev(dev);
- return 0;
-}
-
-struct platform_driver bcm63xx_enet_driver = {
- .probe = bcm_enet_probe,
- .remove = __devexit_p(bcm_enet_remove),
- .driver = {
- .name = "bcm63xx_enet",
- .owner = THIS_MODULE,
- },
-};
-
-/*
- * reserve & remap memory space shared between all macs
- */
-static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
-{
- struct resource *res;
- unsigned int iomem_size;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- iomem_size = res->end - res->start + 1;
- if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
- return -EBUSY;
-
- bcm_enet_shared_base = ioremap(res->start, iomem_size);
- if (!bcm_enet_shared_base) {
- release_mem_region(res->start, iomem_size);
- return -ENOMEM;
- }
- return 0;
-}
-
-static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
-{
- struct resource *res;
-
- iounmap(bcm_enet_shared_base);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, res->end - res->start + 1);
- return 0;
-}
-
-/*
- * this "shared" driver is needed because both macs share a single
- * address space
- */
-struct platform_driver bcm63xx_enet_shared_driver = {
- .probe = bcm_enet_shared_probe,
- .remove = __devexit_p(bcm_enet_shared_remove),
- .driver = {
- .name = "bcm63xx_enet_shared",
- .owner = THIS_MODULE,
- },
-};
-
-/*
- * entry point
- */
-static int __init bcm_enet_init(void)
-{
- int ret;
-
- ret = platform_driver_register(&bcm63xx_enet_shared_driver);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&bcm63xx_enet_driver);
- if (ret)
- platform_driver_unregister(&bcm63xx_enet_shared_driver);
-
- return ret;
-}
-
-static void __exit bcm_enet_exit(void)
-{
- platform_driver_unregister(&bcm63xx_enet_driver);
- platform_driver_unregister(&bcm63xx_enet_shared_driver);
-}
-
-
-module_init(bcm_enet_init);
-module_exit(bcm_enet_exit);
-
-MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
-MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
-MODULE_LICENSE("GPL");
projects / openwrt / svn-archive / archive.git / blobdiff