| /* |
| * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. |
| * |
| * Copyright (c) 2003 Intracom S.A. |
| * by Pantelis Antoniou <panto@intracom.gr> |
| * |
| * 2005 (c) MontaVista Software, Inc. |
| * Vitaly Bordug <vbordug@ru.mvista.com> |
| * |
| * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com> |
| * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se> |
| * |
| * 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 <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/ptrace.h> |
| #include <linux/errno.h> |
| #include <linux/ioport.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/spinlock.h> |
| #include <linux/mii.h> |
| #include <linux/ethtool.h> |
| #include <linux/bitops.h> |
| #include <linux/fs.h> |
| #include <linux/platform_device.h> |
| #include <linux/phy.h> |
| #include <linux/of.h> |
| #include <linux/of_mdio.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_gpio.h> |
| #include <linux/of_net.h> |
| |
| #include <linux/vmalloc.h> |
| #include <asm/pgtable.h> |
| #include <asm/irq.h> |
| #include <asm/uaccess.h> |
| |
| #include "fs_enet.h" |
| |
| /*************************************************/ |
| |
| MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>"); |
| 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 { |
| dev_warn(fep->dev, |
| "Memory squeeze, dropping packet.\n"); |
| 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 { |
| dev_warn(fep->dev, |
| "Memory squeeze, dropping packet.\n"); |
| 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) { |
| dev_warn(fep->dev, |
| "Memory squeeze, unable to allocate skb\n"); |
| 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; |
| struct fs_enet_private *fep = netdev_priv(dev); |
| |
| /* Alloc new skb */ |
| new_skb = netdev_alloc_skb(dev, skb->len + 4); |
| if (!new_skb) { |
| if (net_ratelimit()) { |
| dev_warn(fep->dev, |
| "Memory squeeze, dropping tx packet.\n"); |
| } |
| 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) |
| { |
| strcpy(info->driver, DRV_MODULE_NAME); |
| strcpy(info->version, DRV_MODULE_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, |
| }; |
| |
| 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 __devinit 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; |
| 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; |
| } |
| |
| 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); |
| dev_set_drvdata(&ofdev->dev, 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, 6); |
| |
| 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); |
| dev_set_drvdata(&ofdev->dev, NULL); |
| out_put: |
| of_node_put(fpi->phy_node); |
| out_free_fpi: |
| kfree(fpi); |
| return ret; |
| } |
| |
| static int fs_enet_remove(struct platform_device *ofdev) |
| { |
| struct net_device *ndev = dev_get_drvdata(&ofdev->dev); |
| 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); |
| 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); |