diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom/bcm63xx_enet.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bcm63xx_enet.c | 1966 |
1 files changed, 1966 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c new file mode 100644 index 000000000000..1d9b9858067c --- /dev/null +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c @@ -0,0 +1,1966 @@ +/* + * 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/interrupt.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/etherdevice.h> +#include <linux/slab.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 <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) { + dev->stats.rx_dropped++; + continue; + } + + /* recycle packet if it's marked as bad */ + if (unlikely(len_stat & DMADESC_ERR_MASK)) { + dev->stats.rx_errors++; + + if (len_stat & DMADESC_OVSIZE_MASK) + dev->stats.rx_length_errors++; + if (len_stat & DMADESC_CRC_MASK) + dev->stats.rx_crc_errors++; + if (len_stat & DMADESC_UNDER_MASK) + dev->stats.rx_frame_errors++; + if (len_stat & DMADESC_OV_MASK) + dev->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_ip_align(dev, len); + if (!nskb) { + /* forget packet, just rearm desc */ + dev->stats.rx_dropped++; + continue; + } + + 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->protocol = eth_type_trans(skb, dev); + dev->stats.rx_packets++; + dev->stats.rx_bytes += len; + 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) + dev->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 */ + napi_complete(napi); + + /* 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)); + + napi_schedule(&priv->napi); + + 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); + + dev->stats.tx_bytes += skb->len; + dev->stats.tx_packets++; + 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 (promiscuous/allmulti) and update multicast list + */ +static void bcm_enet_set_multicast_list(struct net_device *dev) +{ + struct bcm_enet_priv *priv; + struct netdev_hw_addr *ha; + 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) || netdev_mc_count(dev) > 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; + } + + i = 0; + netdev_for_each_mc_addr(ha, dev) { + u8 *dmi_addr; + u32 tmp; + + if (i == 3) + break; + /* update perfect match registers */ + dmi_addr = ha->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) + pr_cont(" - %d/%s - flow control %s", phydev->speed, + DUPLEX_FULL == phydev->duplex ? "full" : "half", + phydev->pause == 1 ? "rx&tx" : "off"); + + pr_cont("\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); + netif_carrier_on(dev); + + 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 i, ret; + unsigned int size; + char phy_id[MII_BUS_ID_SIZE + 3]; + void *p; + u32 val; + + priv = netdev_priv(dev); + kdev = &priv->pdev->dev; + + if (priv->has_phy) { + /* connect to PHY */ + snprintf(phy_id, sizeof(phy_id), 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)); + + ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev); + if (ret) + goto out_phy_disconnect; + + ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, IRQF_DISABLED, + dev->name, dev); + if (ret) + goto out_freeirq; + + ret = request_irq(priv->irq_tx, bcm_enet_isr_dma, + IRQF_DISABLED, dev->name, dev); + if (ret) + goto out_freeirq_rx; + + /* 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_freeirq_tx; + } + + 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_free_rx_ring; + } + + 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_free_tx_ring; + } + + 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_free_tx_skb; + } + + 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(); + val = enet_readl(priv, ENET_CTL_REG); + val |= ENET_CTL_ENABLE_MASK; + enet_writel(priv, val, 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: + 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]); + } + kfree(priv->rx_skb); + +out_free_tx_skb: + kfree(priv->tx_skb); + +out_free_tx_ring: + dma_free_coherent(kdev, priv->tx_desc_alloc_size, + priv->tx_desc_cpu, priv->tx_desc_dma); + +out_free_rx_ring: + dma_free_coherent(kdev, priv->rx_desc_alloc_size, + priv->rx_desc_cpu, priv->rx_desc_dma); + +out_freeirq_tx: + free_irq(priv->irq_tx, dev); + +out_freeirq_rx: + free_irq(priv->irq_rx, dev); + +out_freeirq: + free_irq(dev->irq, dev); + +out_phy_disconnect: + phy_disconnect(priv->phydev); + + 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 */ + cancel_work_sync(&priv->mib_update_task); + + /* 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; +} + +/* + * 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) +#define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \ + offsetof(struct net_device_stats, m) + +static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = { + { "rx_packets", DEV_STAT(rx_packets), -1 }, + { "tx_packets", DEV_STAT(tx_packets), -1 }, + { "rx_bytes", DEV_STAT(rx_bytes), -1 }, + { "tx_bytes", DEV_STAT(tx_bytes), -1 }, + { "rx_errors", DEV_STAT(rx_errors), -1 }, + { "tx_errors", DEV_STAT(tx_errors), -1 }, + { "rx_dropped", DEV_STAT(rx_dropped), -1 }, + { "tx_dropped", DEV_STAT(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_sset_count(struct net_device *netdev, + int string_set) +{ + switch (string_set) { + case ETH_SS_STATS: + return BCM_ENET_STATS_LEN; + default: + return -EINVAL; + } +} + +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]; + if (s->mib_reg == -1) + p = (char *)&netdev->stats; + else + p = (char *)priv; + p += 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; + ethtool_cmd_speed_set(cmd, ((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_sset_count = bcm_enet_get_sset_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, 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); +} + +static const struct net_device_ops bcm_enet_ops = { + .ndo_open = bcm_enet_open, + .ndo_stop = bcm_enet_stop, + .ndo_start_xmit = bcm_enet_start_xmit, + .ndo_set_mac_address = bcm_enet_set_mac_address, + .ndo_set_multicast_list = bcm_enet_set_multicast_list, + .ndo_do_ioctl = bcm_enet_ioctl, + .ndo_change_mtu = bcm_enet_change_mtu, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = bcm_enet_netpoll, +#endif +}; + +/* + * 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; + + /* 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; + + 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); + + ret = compute_hw_mtu(priv, dev->mtu); + if (ret) + goto out; + + iomem_size = resource_size(res_mem); + if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) { + ret = -EBUSY; + goto out; + } + + priv->base = ioremap(res_mem->start, iomem_size); + if (priv->base == NULL) { + ret = -ENOMEM; + goto out_release_mem; + } + 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); + goto out_unmap; + } + 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 out_put_clk_mac; + } + 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) { + + priv->mii_bus = mdiobus_alloc(); + if (!priv->mii_bus) { + ret = -ENOMEM; + goto out_uninit_hw; + } + + bus = priv->mii_bus; + bus->name = "bcm63xx_enet MII bus"; + bus->parent = &pdev->dev; + 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 out_free_mdio; + } + + 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 out_free_mdio; + } + } 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 out_uninit_hw; + } + } + + 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->netdev_ops = &bcm_enet_ops; + netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16); + + SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops); + SET_NETDEV_DEV(dev, &pdev->dev); + + ret = register_netdev(dev); + if (ret) + goto out_unregister_mdio; + + netif_carrier_off(dev); + platform_set_drvdata(pdev, dev); + priv->pdev = pdev; + priv->net_dev = dev; + + return 0; + +out_unregister_mdio: + if (priv->mii_bus) { + mdiobus_unregister(priv->mii_bus); + kfree(priv->mii_bus->irq); + } + +out_free_mdio: + if (priv->mii_bus) + mdiobus_free(priv->mii_bus); + +out_uninit_hw: + /* turn off mdc clock */ + enet_writel(priv, 0, ENET_MIISC_REG); + if (priv->phy_clk) { + clk_disable(priv->phy_clk); + clk_put(priv->phy_clk); + } + +out_put_clk_mac: + clk_disable(priv->mac_clk); + clk_put(priv->mac_clk); + +out_unmap: + iounmap(priv->base); + +out_release_mem: + release_mem_region(res_mem->start, iomem_size); +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); + mdiobus_free(priv->mii_bus); + } 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, resource_size(res)); + + /* 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 = resource_size(res); + 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, resource_size(res)); + 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"); |