/* * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. * * Copyright (c) 2003 Intracom S.A. * by Pantelis Antoniou * * 2005 (c) MontaVista Software, Inc. * Vitaly Bordug * * Heavily based on original FEC driver by Dan Malek * and modifications by Joakim Tjernlund * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fs_enet.h" /*************************************************/ MODULE_AUTHOR("Pantelis Antoniou "); MODULE_DESCRIPTION("Freescale Ethernet Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_MODULE_VERSION); static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ module_param(fs_enet_debug, int, 0); MODULE_PARM_DESC(fs_enet_debug, "Freescale bitmapped debugging message enable value"); #ifdef CONFIG_NET_POLL_CONTROLLER static void fs_enet_netpoll(struct net_device *dev); #endif static void fs_set_multicast_list(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); (*fep->ops->set_multicast_list)(dev); } static void skb_align(struct sk_buff *skb, int align) { int off = ((unsigned long)skb->data) & (align - 1); if (off) skb_reserve(skb, align - off); } /* NAPI receive function */ static int fs_enet_rx_napi(struct napi_struct *napi, int budget) { struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi); struct net_device *dev = fep->ndev; const struct fs_platform_info *fpi = fep->fpi; cbd_t __iomem *bdp; struct sk_buff *skb, *skbn, *skbt; int received = 0; u16 pkt_len, sc; int curidx; /* * First, grab all of the stats for the incoming packet. * These get messed up if we get called due to a busy condition. */ bdp = fep->cur_rx; /* clear RX status bits for napi*/ (*fep->ops->napi_clear_rx_event)(dev); while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) { curidx = bdp - fep->rx_bd_base; /* * Since we have allocated space to hold a complete frame, * the last indicator should be set. */ if ((sc & BD_ENET_RX_LAST) == 0) dev_warn(fep->dev, "rcv is not +last\n"); /* * Check for errors. */ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL | BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { fep->stats.rx_errors++; /* Frame too long or too short. */ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) fep->stats.rx_length_errors++; /* Frame alignment */ if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) fep->stats.rx_frame_errors++; /* CRC Error */ if (sc & BD_ENET_RX_CR) fep->stats.rx_crc_errors++; /* FIFO overrun */ if (sc & BD_ENET_RX_OV) fep->stats.rx_crc_errors++; skb = fep->rx_skbuff[curidx]; dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE); skbn = skb; } else { skb = fep->rx_skbuff[curidx]; dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE); /* * Process the incoming frame. */ fep->stats.rx_packets++; pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ fep->stats.rx_bytes += pkt_len + 4; if (pkt_len <= fpi->rx_copybreak) { /* +2 to make IP header L1 cache aligned */ skbn = netdev_alloc_skb(dev, pkt_len + 2); if (skbn != NULL) { skb_reserve(skbn, 2); /* align IP header */ skb_copy_from_linear_data(skb, skbn->data, pkt_len); /* swap */ skbt = skb; skb = skbn; skbn = skbt; } } else { skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); if (skbn) skb_align(skbn, ENET_RX_ALIGN); } if (skbn != NULL) { skb_put(skb, pkt_len); /* Make room */ skb->protocol = eth_type_trans(skb, dev); received++; netif_receive_skb(skb); } else { fep->stats.rx_dropped++; skbn = skb; } } fep->rx_skbuff[curidx] = skbn; CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data, L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE)); CBDW_DATLEN(bdp, 0); CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY); /* * Update BD pointer to next entry. */ if ((sc & BD_ENET_RX_WRAP) == 0) bdp++; else bdp = fep->rx_bd_base; (*fep->ops->rx_bd_done)(dev); if (received >= budget) break; } fep->cur_rx = bdp; if (received < budget) { /* done */ napi_complete(napi); (*fep->ops->napi_enable_rx)(dev); } return received; } /* non NAPI receive function */ static int fs_enet_rx_non_napi(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); const struct fs_platform_info *fpi = fep->fpi; cbd_t __iomem *bdp; struct sk_buff *skb, *skbn, *skbt; int received = 0; u16 pkt_len, sc; int curidx; /* * First, grab all of the stats for the incoming packet. * These get messed up if we get called due to a busy condition. */ bdp = fep->cur_rx; while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) { curidx = bdp - fep->rx_bd_base; /* * Since we have allocated space to hold a complete frame, * the last indicator should be set. */ if ((sc & BD_ENET_RX_LAST) == 0) dev_warn(fep->dev, "rcv is not +last\n"); /* * Check for errors. */ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL | BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { fep->stats.rx_errors++; /* Frame too long or too short. */ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) fep->stats.rx_length_errors++; /* Frame alignment */ if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) fep->stats.rx_frame_errors++; /* CRC Error */ if (sc & BD_ENET_RX_CR) fep->stats.rx_crc_errors++; /* FIFO overrun */ if (sc & BD_ENET_RX_OV) fep->stats.rx_crc_errors++; skb = fep->rx_skbuff[curidx]; dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE); skbn = skb; } else { skb = fep->rx_skbuff[curidx]; dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE); /* * Process the incoming frame. */ fep->stats.rx_packets++; pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ fep->stats.rx_bytes += pkt_len + 4; if (pkt_len <= fpi->rx_copybreak) { /* +2 to make IP header L1 cache aligned */ skbn = netdev_alloc_skb(dev, pkt_len + 2); if (skbn != NULL) { skb_reserve(skbn, 2); /* align IP header */ skb_copy_from_linear_data(skb, skbn->data, pkt_len); /* swap */ skbt = skb; skb = skbn; skbn = skbt; } } else { skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); if (skbn) skb_align(skbn, ENET_RX_ALIGN); } if (skbn != NULL) { skb_put(skb, pkt_len); /* Make room */ skb->protocol = eth_type_trans(skb, dev); received++; netif_rx(skb); } else { fep->stats.rx_dropped++; skbn = skb; } } fep->rx_skbuff[curidx] = skbn; CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data, L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE)); CBDW_DATLEN(bdp, 0); CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY); /* * Update BD pointer to next entry. */ if ((sc & BD_ENET_RX_WRAP) == 0) bdp++; else bdp = fep->rx_bd_base; (*fep->ops->rx_bd_done)(dev); } fep->cur_rx = bdp; return 0; } static void fs_enet_tx(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); cbd_t __iomem *bdp; struct sk_buff *skb; int dirtyidx, do_wake, do_restart; u16 sc; spin_lock(&fep->tx_lock); bdp = fep->dirty_tx; do_wake = do_restart = 0; while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) { dirtyidx = bdp - fep->tx_bd_base; if (fep->tx_free == fep->tx_ring) break; skb = fep->tx_skbuff[dirtyidx]; /* * Check for errors. */ if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) { if (sc & BD_ENET_TX_HB) /* No heartbeat */ fep->stats.tx_heartbeat_errors++; if (sc & BD_ENET_TX_LC) /* Late collision */ fep->stats.tx_window_errors++; if (sc & BD_ENET_TX_RL) /* Retrans limit */ fep->stats.tx_aborted_errors++; if (sc & BD_ENET_TX_UN) /* Underrun */ fep->stats.tx_fifo_errors++; if (sc & BD_ENET_TX_CSL) /* Carrier lost */ fep->stats.tx_carrier_errors++; if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) { fep->stats.tx_errors++; do_restart = 1; } } else fep->stats.tx_packets++; if (sc & BD_ENET_TX_READY) { dev_warn(fep->dev, "HEY! Enet xmit interrupt and TX_READY.\n"); } /* * Deferred means some collisions occurred during transmit, * but we eventually sent the packet OK. */ if (sc & BD_ENET_TX_DEF) fep->stats.collisions++; /* unmap */ dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), skb->len, DMA_TO_DEVICE); /* * Free the sk buffer associated with this last transmit. */ dev_kfree_skb_irq(skb); fep->tx_skbuff[dirtyidx] = NULL; /* * Update pointer to next buffer descriptor to be transmitted. */ if ((sc & BD_ENET_TX_WRAP) == 0) bdp++; else bdp = fep->tx_bd_base; /* * Since we have freed up a buffer, the ring is no longer * full. */ if (!fep->tx_free++) do_wake = 1; } fep->dirty_tx = bdp; if (do_restart) (*fep->ops->tx_restart)(dev); spin_unlock(&fep->tx_lock); if (do_wake) netif_wake_queue(dev); } /* * The interrupt handler. * This is called from the MPC core interrupt. */ static irqreturn_t fs_enet_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct fs_enet_private *fep; const struct fs_platform_info *fpi; u32 int_events; u32 int_clr_events; int nr, napi_ok; int handled; fep = netdev_priv(dev); fpi = fep->fpi; nr = 0; while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) { nr++; int_clr_events = int_events; if (fpi->use_napi) int_clr_events &= ~fep->ev_napi_rx; (*fep->ops->clear_int_events)(dev, int_clr_events); if (int_events & fep->ev_err) (*fep->ops->ev_error)(dev, int_events); if (int_events & fep->ev_rx) { if (!fpi->use_napi) fs_enet_rx_non_napi(dev); else { napi_ok = napi_schedule_prep(&fep->napi); (*fep->ops->napi_disable_rx)(dev); (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx); /* NOTE: it is possible for FCCs in NAPI mode */ /* to submit a spurious interrupt while in poll */ if (napi_ok) __napi_schedule(&fep->napi); } } if (int_events & fep->ev_tx) fs_enet_tx(dev); } handled = nr > 0; return IRQ_RETVAL(handled); } void fs_init_bds(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); cbd_t __iomem *bdp; struct sk_buff *skb; int i; fs_cleanup_bds(dev); fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; fep->tx_free = fep->tx_ring; fep->cur_rx = fep->rx_bd_base; /* * Initialize the receive buffer descriptors. */ for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE); if (skb == NULL) break; skb_align(skb, ENET_RX_ALIGN); fep->rx_skbuff[i] = skb; CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skb->data, L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE)); CBDW_DATLEN(bdp, 0); /* zero */ CBDW_SC(bdp, BD_ENET_RX_EMPTY | ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP)); } /* * if we failed, fillup remainder */ for (; i < fep->rx_ring; i++, bdp++) { fep->rx_skbuff[i] = NULL; CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP); } /* * ...and the same for transmit. */ for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { fep->tx_skbuff[i] = NULL; CBDW_BUFADDR(bdp, 0); CBDW_DATLEN(bdp, 0); CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP); } } void fs_cleanup_bds(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); struct sk_buff *skb; cbd_t __iomem *bdp; int i; /* * Reset SKB transmit buffers. */ for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { if ((skb = fep->tx_skbuff[i]) == NULL) continue; /* unmap */ dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), skb->len, DMA_TO_DEVICE); fep->tx_skbuff[i] = NULL; dev_kfree_skb(skb); } /* * Reset SKB receive buffers */ for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { if ((skb = fep->rx_skbuff[i]) == NULL) continue; /* unmap */ dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), DMA_FROM_DEVICE); fep->rx_skbuff[i] = NULL; dev_kfree_skb(skb); } } /**********************************************************************************/ #ifdef CONFIG_FS_ENET_MPC5121_FEC /* * MPC5121 FEC requeries 4-byte alignment for TX data buffer! */ static struct sk_buff *tx_skb_align_workaround(struct net_device *dev, struct sk_buff *skb) { struct sk_buff *new_skb; /* Alloc new skb */ new_skb = netdev_alloc_skb(dev, skb->len + 4); if (!new_skb) return NULL; /* Make sure new skb is properly aligned */ skb_align(new_skb, 4); /* Copy data to new skb ... */ skb_copy_from_linear_data(skb, new_skb->data, skb->len); skb_put(new_skb, skb->len); /* ... and free an old one */ dev_kfree_skb_any(skb); return new_skb; } #endif static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); cbd_t __iomem *bdp; int curidx; u16 sc; unsigned long flags; #ifdef CONFIG_FS_ENET_MPC5121_FEC if (((unsigned long)skb->data) & 0x3) { skb = tx_skb_align_workaround(dev, skb); if (!skb) { /* * We have lost packet due to memory allocation error * in tx_skb_align_workaround(). Hopefully original * skb is still valid, so try transmit it later. */ return NETDEV_TX_BUSY; } } #endif spin_lock_irqsave(&fep->tx_lock, flags); /* * Fill in a Tx ring entry */ bdp = fep->cur_tx; if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) { netif_stop_queue(dev); spin_unlock_irqrestore(&fep->tx_lock, flags); /* * Ooops. All transmit buffers are full. Bail out. * This should not happen, since the tx queue should be stopped. */ dev_warn(fep->dev, "tx queue full!.\n"); return NETDEV_TX_BUSY; } curidx = bdp - fep->tx_bd_base; /* * Clear all of the status flags. */ CBDC_SC(bdp, BD_ENET_TX_STATS); /* * Save skb pointer. */ fep->tx_skbuff[curidx] = skb; fep->stats.tx_bytes += skb->len; /* * Push the data cache so the CPM does not get stale memory data. */ CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skb->data, skb->len, DMA_TO_DEVICE)); CBDW_DATLEN(bdp, skb->len); /* * If this was the last BD in the ring, start at the beginning again. */ if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) fep->cur_tx++; else fep->cur_tx = fep->tx_bd_base; if (!--fep->tx_free) netif_stop_queue(dev); /* Trigger transmission start */ sc = BD_ENET_TX_READY | BD_ENET_TX_INTR | BD_ENET_TX_LAST | BD_ENET_TX_TC; /* note that while FEC does not have this bit * it marks it as available for software use * yay for hw reuse :) */ if (skb->len <= 60) sc |= BD_ENET_TX_PAD; CBDS_SC(bdp, sc); skb_tx_timestamp(skb); (*fep->ops->tx_kickstart)(dev); spin_unlock_irqrestore(&fep->tx_lock, flags); return NETDEV_TX_OK; } static void fs_timeout(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); unsigned long flags; int wake = 0; fep->stats.tx_errors++; spin_lock_irqsave(&fep->lock, flags); if (dev->flags & IFF_UP) { phy_stop(fep->phydev); (*fep->ops->stop)(dev); (*fep->ops->restart)(dev); phy_start(fep->phydev); } phy_start(fep->phydev); wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY); spin_unlock_irqrestore(&fep->lock, flags); if (wake) netif_wake_queue(dev); } /*----------------------------------------------------------------------------- * generic link-change handler - should be sufficient for most cases *-----------------------------------------------------------------------------*/ static void generic_adjust_link(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); struct phy_device *phydev = fep->phydev; int new_state = 0; if (phydev->link) { /* adjust to duplex mode */ if (phydev->duplex != fep->oldduplex) { new_state = 1; fep->oldduplex = phydev->duplex; } if (phydev->speed != fep->oldspeed) { new_state = 1; fep->oldspeed = phydev->speed; } if (!fep->oldlink) { new_state = 1; fep->oldlink = 1; } if (new_state) fep->ops->restart(dev); } else if (fep->oldlink) { new_state = 1; fep->oldlink = 0; fep->oldspeed = 0; fep->oldduplex = -1; } if (new_state && netif_msg_link(fep)) phy_print_status(phydev); } static void fs_adjust_link(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); unsigned long flags; spin_lock_irqsave(&fep->lock, flags); if(fep->ops->adjust_link) fep->ops->adjust_link(dev); else generic_adjust_link(dev); spin_unlock_irqrestore(&fep->lock, flags); } static int fs_init_phy(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); struct phy_device *phydev; phy_interface_t iface; fep->oldlink = 0; fep->oldspeed = 0; fep->oldduplex = -1; iface = fep->fpi->use_rmii ? PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII; phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0, iface); if (!phydev) { phydev = of_phy_connect_fixed_link(dev, &fs_adjust_link, iface); } if (!phydev) { dev_err(&dev->dev, "Could not attach to PHY\n"); return -ENODEV; } fep->phydev = phydev; return 0; } static int fs_enet_open(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); int r; int err; /* to initialize the fep->cur_rx,... */ /* not doing this, will cause a crash in fs_enet_rx_napi */ fs_init_bds(fep->ndev); if (fep->fpi->use_napi) napi_enable(&fep->napi); /* Install our interrupt handler. */ r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED, "fs_enet-mac", dev); if (r != 0) { dev_err(fep->dev, "Could not allocate FS_ENET IRQ!"); if (fep->fpi->use_napi) napi_disable(&fep->napi); return -EINVAL; } err = fs_init_phy(dev); if (err) { free_irq(fep->interrupt, dev); if (fep->fpi->use_napi) napi_disable(&fep->napi); return err; } phy_start(fep->phydev); netif_start_queue(dev); return 0; } static int fs_enet_close(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); unsigned long flags; netif_stop_queue(dev); netif_carrier_off(dev); if (fep->fpi->use_napi) napi_disable(&fep->napi); phy_stop(fep->phydev); spin_lock_irqsave(&fep->lock, flags); spin_lock(&fep->tx_lock); (*fep->ops->stop)(dev); spin_unlock(&fep->tx_lock); spin_unlock_irqrestore(&fep->lock, flags); /* release any irqs */ phy_disconnect(fep->phydev); fep->phydev = NULL; free_irq(fep->interrupt, dev); return 0; } static struct net_device_stats *fs_enet_get_stats(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); return &fep->stats; } /*************************************************************************/ static void fs_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version)); } static int fs_get_regs_len(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); return (*fep->ops->get_regs_len)(dev); } static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) { struct fs_enet_private *fep = netdev_priv(dev); unsigned long flags; int r, len; len = regs->len; spin_lock_irqsave(&fep->lock, flags); r = (*fep->ops->get_regs)(dev, p, &len); spin_unlock_irqrestore(&fep->lock, flags); if (r == 0) regs->version = 0; } static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct fs_enet_private *fep = netdev_priv(dev); if (!fep->phydev) return -ENODEV; return phy_ethtool_gset(fep->phydev, cmd); } static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct fs_enet_private *fep = netdev_priv(dev); if (!fep->phydev) return -ENODEV; return phy_ethtool_sset(fep->phydev, cmd); } static int fs_nway_reset(struct net_device *dev) { return 0; } static u32 fs_get_msglevel(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); return fep->msg_enable; } static void fs_set_msglevel(struct net_device *dev, u32 value) { struct fs_enet_private *fep = netdev_priv(dev); fep->msg_enable = value; } static const struct ethtool_ops fs_ethtool_ops = { .get_drvinfo = fs_get_drvinfo, .get_regs_len = fs_get_regs_len, .get_settings = fs_get_settings, .set_settings = fs_set_settings, .nway_reset = fs_nway_reset, .get_link = ethtool_op_get_link, .get_msglevel = fs_get_msglevel, .set_msglevel = fs_set_msglevel, .get_regs = fs_get_regs, .get_ts_info = ethtool_op_get_ts_info, }; static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct fs_enet_private *fep = netdev_priv(dev); if (!netif_running(dev)) return -EINVAL; return phy_mii_ioctl(fep->phydev, rq, cmd); } extern int fs_mii_connect(struct net_device *dev); extern void fs_mii_disconnect(struct net_device *dev); /**************************************************************************************/ #ifdef CONFIG_FS_ENET_HAS_FEC #define IS_FEC(match) ((match)->data == &fs_fec_ops) #else #define IS_FEC(match) 0 #endif static const struct net_device_ops fs_enet_netdev_ops = { .ndo_open = fs_enet_open, .ndo_stop = fs_enet_close, .ndo_get_stats = fs_enet_get_stats, .ndo_start_xmit = fs_enet_start_xmit, .ndo_tx_timeout = fs_timeout, .ndo_set_rx_mode = fs_set_multicast_list, .ndo_do_ioctl = fs_ioctl, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, .ndo_change_mtu = eth_change_mtu, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = fs_enet_netpoll, #endif }; static struct of_device_id fs_enet_match[]; static int fs_enet_probe(struct platform_device *ofdev) { const struct of_device_id *match; struct net_device *ndev; struct fs_enet_private *fep; struct fs_platform_info *fpi; const u32 *data; struct clk *clk; int err; const u8 *mac_addr; const char *phy_connection_type; int privsize, len, ret = -ENODEV; match = of_match_device(fs_enet_match, &ofdev->dev); if (!match) return -EINVAL; fpi = kzalloc(sizeof(*fpi), GFP_KERNEL); if (!fpi) return -ENOMEM; if (!IS_FEC(match)) { data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len); if (!data || len != 4) goto out_free_fpi; fpi->cp_command = *data; } fpi->rx_ring = 32; fpi->tx_ring = 32; fpi->rx_copybreak = 240; fpi->use_napi = 1; fpi->napi_weight = 17; fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); if ((!fpi->phy_node) && (!of_get_property(ofdev->dev.of_node, "fixed-link", NULL))) goto out_free_fpi; if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) { phy_connection_type = of_get_property(ofdev->dev.of_node, "phy-connection-type", NULL); if (phy_connection_type && !strcmp("rmii", phy_connection_type)) fpi->use_rmii = 1; } /* make clock lookup non-fatal (the driver is shared among platforms), * but require enable to succeed when a clock was specified/found, * keep a reference to the clock upon successful acquisition */ clk = devm_clk_get(&ofdev->dev, "per"); if (!IS_ERR(clk)) { err = clk_prepare_enable(clk); if (err) { ret = err; goto out_free_fpi; } fpi->clk_per = clk; } privsize = sizeof(*fep) + sizeof(struct sk_buff **) * (fpi->rx_ring + fpi->tx_ring); ndev = alloc_etherdev(privsize); if (!ndev) { ret = -ENOMEM; goto out_put; } SET_NETDEV_DEV(ndev, &ofdev->dev); platform_set_drvdata(ofdev, ndev); fep = netdev_priv(ndev); fep->dev = &ofdev->dev; fep->ndev = ndev; fep->fpi = fpi; fep->ops = match->data; ret = fep->ops->setup_data(ndev); if (ret) goto out_free_dev; fep->rx_skbuff = (struct sk_buff **)&fep[1]; fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring; spin_lock_init(&fep->lock); spin_lock_init(&fep->tx_lock); mac_addr = of_get_mac_address(ofdev->dev.of_node); if (mac_addr) memcpy(ndev->dev_addr, mac_addr, ETH_ALEN); ret = fep->ops->allocate_bd(ndev); if (ret) goto out_cleanup_data; fep->rx_bd_base = fep->ring_base; fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring; fep->tx_ring = fpi->tx_ring; fep->rx_ring = fpi->rx_ring; ndev->netdev_ops = &fs_enet_netdev_ops; ndev->watchdog_timeo = 2 * HZ; if (fpi->use_napi) netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi, fpi->napi_weight); ndev->ethtool_ops = &fs_ethtool_ops; init_timer(&fep->phy_timer_list); netif_carrier_off(ndev); ret = register_netdev(ndev); if (ret) goto out_free_bd; pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr); return 0; out_free_bd: fep->ops->free_bd(ndev); out_cleanup_data: fep->ops->cleanup_data(ndev); out_free_dev: free_netdev(ndev); out_put: of_node_put(fpi->phy_node); if (fpi->clk_per) clk_disable_unprepare(fpi->clk_per); out_free_fpi: kfree(fpi); return ret; } static int fs_enet_remove(struct platform_device *ofdev) { struct net_device *ndev = platform_get_drvdata(ofdev); struct fs_enet_private *fep = netdev_priv(ndev); unregister_netdev(ndev); fep->ops->free_bd(ndev); fep->ops->cleanup_data(ndev); dev_set_drvdata(fep->dev, NULL); of_node_put(fep->fpi->phy_node); if (fep->fpi->clk_per) clk_disable_unprepare(fep->fpi->clk_per); free_netdev(ndev); return 0; } static struct of_device_id fs_enet_match[] = { #ifdef CONFIG_FS_ENET_HAS_SCC { .compatible = "fsl,cpm1-scc-enet", .data = (void *)&fs_scc_ops, }, { .compatible = "fsl,cpm2-scc-enet", .data = (void *)&fs_scc_ops, }, #endif #ifdef CONFIG_FS_ENET_HAS_FCC { .compatible = "fsl,cpm2-fcc-enet", .data = (void *)&fs_fcc_ops, }, #endif #ifdef CONFIG_FS_ENET_HAS_FEC #ifdef CONFIG_FS_ENET_MPC5121_FEC { .compatible = "fsl,mpc5121-fec", .data = (void *)&fs_fec_ops, }, { .compatible = "fsl,mpc5125-fec", .data = (void *)&fs_fec_ops, }, #else { .compatible = "fsl,pq1-fec-enet", .data = (void *)&fs_fec_ops, }, #endif #endif {} }; MODULE_DEVICE_TABLE(of, fs_enet_match); static struct platform_driver fs_enet_driver = { .driver = { .owner = THIS_MODULE, .name = "fs_enet", .of_match_table = fs_enet_match, }, .probe = fs_enet_probe, .remove = fs_enet_remove, }; #ifdef CONFIG_NET_POLL_CONTROLLER static void fs_enet_netpoll(struct net_device *dev) { disable_irq(dev->irq); fs_enet_interrupt(dev->irq, dev); enable_irq(dev->irq); } #endif module_platform_driver(fs_enet_driver);