| /* |
| * 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/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/pgtable.h> |
| |
| #include <linux/vmalloc.h> |
| #include <asm/irq.h> |
| #include <linux/uaccess.h> |
| |
| #include "fs_enet.h" |
| |
| /*************************************************/ |
| |
| MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>"); |
| MODULE_DESCRIPTION("Freescale Ethernet Driver"); |
| MODULE_LICENSE("GPL"); |
| |
| 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"); |
| |
| #define RX_RING_SIZE 32 |
| #define TX_RING_SIZE 64 |
| |
| #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 function */ |
| static int fs_enet_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; |
| int received = 0; |
| u16 pkt_len, sc; |
| int curidx; |
| int dirtyidx, do_wake, do_restart; |
| int tx_left = TX_RING_SIZE; |
| |
| spin_lock(&fep->tx_lock); |
| bdp = fep->dirty_tx; |
| |
| /* clear status bits for napi*/ |
| (*fep->ops->napi_clear_event)(dev); |
| |
| do_wake = do_restart = 0; |
| while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) { |
| 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 */ |
| dev->stats.tx_heartbeat_errors++; |
| if (sc & BD_ENET_TX_LC) /* Late collision */ |
| dev->stats.tx_window_errors++; |
| if (sc & BD_ENET_TX_RL) /* Retrans limit */ |
| dev->stats.tx_aborted_errors++; |
| if (sc & BD_ENET_TX_UN) /* Underrun */ |
| dev->stats.tx_fifo_errors++; |
| if (sc & BD_ENET_TX_CSL) /* Carrier lost */ |
| dev->stats.tx_carrier_errors++; |
| |
| if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) { |
| dev->stats.tx_errors++; |
| do_restart = 1; |
| } |
| } else |
| dev->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) |
| dev->stats.collisions++; |
| |
| /* unmap */ |
| if (fep->mapped_as_page[dirtyidx]) |
| dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp), |
| CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
| else |
| dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
| CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
| |
| /* |
| * Free the sk buffer associated with this last transmit. |
| */ |
| if (skb) { |
| dev_kfree_skb(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 == MAX_SKB_FRAGS) |
| do_wake = 1; |
| tx_left--; |
| } |
| |
| fep->dirty_tx = bdp; |
| |
| if (do_restart) |
| (*fep->ops->tx_restart)(dev); |
| |
| spin_unlock(&fep->tx_lock); |
| |
| if (do_wake) |
| netif_wake_queue(dev); |
| |
| /* |
| * 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 && |
| received < budget) { |
| 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)) { |
| dev->stats.rx_errors++; |
| /* Frame too long or too short. */ |
| if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) |
| dev->stats.rx_length_errors++; |
| /* Frame alignment */ |
| if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) |
| dev->stats.rx_frame_errors++; |
| /* CRC Error */ |
| if (sc & BD_ENET_RX_CR) |
| dev->stats.rx_crc_errors++; |
| /* FIFO overrun */ |
| if (sc & BD_ENET_RX_OV) |
| dev->stats.rx_crc_errors++; |
| |
| skbn = fep->rx_skbuff[curidx]; |
| } else { |
| skb = fep->rx_skbuff[curidx]; |
| |
| /* |
| * Process the incoming frame. |
| */ |
| dev->stats.rx_packets++; |
| pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ |
| dev->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(skb, skbn); |
| dma_sync_single_for_cpu(fep->dev, |
| CBDR_BUFADDR(bdp), |
| L1_CACHE_ALIGN(pkt_len), |
| DMA_FROM_DEVICE); |
| } |
| } else { |
| skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); |
| |
| if (skbn) { |
| dma_addr_t dma; |
| |
| skb_align(skbn, ENET_RX_ALIGN); |
| |
| dma_unmap_single(fep->dev, |
| CBDR_BUFADDR(bdp), |
| L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| DMA_FROM_DEVICE); |
| |
| dma = dma_map_single(fep->dev, |
| skbn->data, |
| L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| DMA_FROM_DEVICE); |
| CBDW_BUFADDR(bdp, dma); |
| } |
| } |
| |
| if (skbn != NULL) { |
| skb_put(skb, pkt_len); /* Make room */ |
| skb->protocol = eth_type_trans(skb, dev); |
| received++; |
| netif_receive_skb(skb); |
| } else { |
| dev->stats.rx_dropped++; |
| skbn = skb; |
| } |
| } |
| |
| fep->rx_skbuff[curidx] = skbn; |
| 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; |
| |
| if (received < budget && tx_left) { |
| /* done */ |
| napi_complete_done(napi, received); |
| (*fep->ops->napi_enable)(dev); |
| |
| return received; |
| } |
| |
| return budget; |
| } |
| |
| /* |
| * 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; |
| int_clr_events &= ~fep->ev_napi; |
| |
| (*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) { |
| napi_ok = napi_schedule_prep(&fep->napi); |
| |
| (*fep->ops->napi_disable)(dev); |
| (*fep->ops->clear_int_events)(dev, fep->ev_napi); |
| |
| /* NOTE: it is possible for FCCs in NAPI mode */ |
| /* to submit a spurious interrupt while in poll */ |
| if (napi_ok) |
| __napi_schedule(&fep->napi); |
| } |
| |
| } |
| |
| 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; |
| |
| if (skb_linearize(skb)) |
| return NULL; |
| |
| /* 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 netdev_tx_t |
| 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; |
| int nr_frags; |
| skb_frag_t *frag; |
| int len; |
| #ifdef CONFIG_FS_ENET_MPC5121_FEC |
| int is_aligned = 1; |
| int i; |
| |
| if (!IS_ALIGNED((unsigned long)skb->data, 4)) { |
| is_aligned = 0; |
| } else { |
| nr_frags = skb_shinfo(skb)->nr_frags; |
| frag = skb_shinfo(skb)->frags; |
| for (i = 0; i < nr_frags; i++, frag++) { |
| if (!IS_ALIGNED(skb_frag_off(frag), 4)) { |
| is_aligned = 0; |
| break; |
| } |
| } |
| } |
| |
| if (!is_aligned) { |
| 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(&fep->tx_lock); |
| |
| /* |
| * Fill in a Tx ring entry |
| */ |
| bdp = fep->cur_tx; |
| |
| nr_frags = skb_shinfo(skb)->nr_frags; |
| if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) { |
| netif_stop_queue(dev); |
| spin_unlock(&fep->tx_lock); |
| |
| /* |
| * 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; |
| |
| len = skb->len; |
| dev->stats.tx_bytes += len; |
| if (nr_frags) |
| len -= skb->data_len; |
| fep->tx_free -= nr_frags + 1; |
| /* |
| * Push the data cache so the CPM does not get stale memory data. |
| */ |
| CBDW_BUFADDR(bdp, dma_map_single(fep->dev, |
| skb->data, len, DMA_TO_DEVICE)); |
| CBDW_DATLEN(bdp, len); |
| |
| fep->mapped_as_page[curidx] = 0; |
| frag = skb_shinfo(skb)->frags; |
| while (nr_frags) { |
| CBDC_SC(bdp, |
| BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST | |
| BD_ENET_TX_TC); |
| CBDS_SC(bdp, BD_ENET_TX_READY); |
| |
| if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) { |
| bdp++; |
| curidx++; |
| } else { |
| bdp = fep->tx_bd_base; |
| curidx = 0; |
| } |
| |
| len = skb_frag_size(frag); |
| CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len, |
| DMA_TO_DEVICE)); |
| CBDW_DATLEN(bdp, len); |
| |
| fep->tx_skbuff[curidx] = NULL; |
| fep->mapped_as_page[curidx] = 1; |
| |
| frag++; |
| nr_frags--; |
| } |
| |
| /* 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; |
| CBDC_SC(bdp, BD_ENET_TX_STATS); |
| CBDS_SC(bdp, sc); |
| |
| /* Save skb pointer. */ |
| fep->tx_skbuff[curidx] = skb; |
| |
| /* If this was the last BD in the ring, start at the beginning again. */ |
| if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) |
| bdp++; |
| else |
| bdp = fep->tx_bd_base; |
| fep->cur_tx = bdp; |
| |
| if (fep->tx_free < MAX_SKB_FRAGS) |
| netif_stop_queue(dev); |
| |
| skb_tx_timestamp(skb); |
| |
| (*fep->ops->tx_kickstart)(dev); |
| |
| spin_unlock(&fep->tx_lock); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static void fs_timeout_work(struct work_struct *work) |
| { |
| struct fs_enet_private *fep = container_of(work, struct fs_enet_private, |
| timeout_work); |
| struct net_device *dev = fep->ndev; |
| unsigned long flags; |
| int wake = 0; |
| |
| dev->stats.tx_errors++; |
| |
| spin_lock_irqsave(&fep->lock, flags); |
| |
| if (dev->flags & IFF_UP) { |
| phy_stop(dev->phydev); |
| (*fep->ops->stop)(dev); |
| (*fep->ops->restart)(dev); |
| } |
| |
| phy_start(dev->phydev); |
| wake = fep->tx_free >= MAX_SKB_FRAGS && |
| !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY); |
| spin_unlock_irqrestore(&fep->lock, flags); |
| |
| if (wake) |
| netif_wake_queue(dev); |
| } |
| |
| static void fs_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| struct fs_enet_private *fep = netdev_priv(dev); |
| |
| schedule_work(&fep->timeout_work); |
| } |
| |
| /*----------------------------------------------------------------------------- |
| * 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 = dev->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) { |
| dev_err(&dev->dev, "Could not attach to PHY\n"); |
| return -ENODEV; |
| } |
| |
| 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_napi */ |
| fs_init_bds(fep->ndev); |
| |
| 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!"); |
| napi_disable(&fep->napi); |
| return -EINVAL; |
| } |
| |
| err = fs_init_phy(dev); |
| if (err) { |
| free_irq(fep->interrupt, dev); |
| napi_disable(&fep->napi); |
| return err; |
| } |
| phy_start(dev->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); |
| napi_disable(&fep->napi); |
| cancel_work_sync(&fep->timeout_work); |
| phy_stop(dev->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(dev->phydev); |
| free_irq(fep->interrupt, dev); |
| |
| return 0; |
| } |
| |
| /*************************************************************************/ |
| |
| static void fs_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); |
| } |
| |
| 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 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 int fs_get_tunable(struct net_device *dev, |
| const struct ethtool_tunable *tuna, void *data) |
| { |
| struct fs_enet_private *fep = netdev_priv(dev); |
| struct fs_platform_info *fpi = fep->fpi; |
| int ret = 0; |
| |
| switch (tuna->id) { |
| case ETHTOOL_RX_COPYBREAK: |
| *(u32 *)data = fpi->rx_copybreak; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int fs_set_tunable(struct net_device *dev, |
| const struct ethtool_tunable *tuna, const void *data) |
| { |
| struct fs_enet_private *fep = netdev_priv(dev); |
| struct fs_platform_info *fpi = fep->fpi; |
| int ret = 0; |
| |
| switch (tuna->id) { |
| case ETHTOOL_RX_COPYBREAK: |
| fpi->rx_copybreak = *(u32 *)data; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static const struct ethtool_ops fs_ethtool_ops = { |
| .get_drvinfo = fs_get_drvinfo, |
| .get_regs_len = fs_get_regs_len, |
| .nway_reset = phy_ethtool_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, |
| .get_link_ksettings = phy_ethtool_get_link_ksettings, |
| .set_link_ksettings = phy_ethtool_set_link_ksettings, |
| .get_tunable = fs_get_tunable, |
| .set_tunable = fs_set_tunable, |
| }; |
| |
| /**************************************************************************************/ |
| |
| #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_start_xmit = fs_enet_start_xmit, |
| .ndo_tx_timeout = fs_timeout, |
| .ndo_set_rx_mode = fs_set_multicast_list, |
| .ndo_eth_ioctl = phy_do_ioctl_running, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = fs_enet_netpoll, |
| #endif |
| }; |
| |
| static const 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 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 = RX_RING_SIZE; |
| fpi->tx_ring = TX_RING_SIZE; |
| fpi->rx_copybreak = 240; |
| fpi->napi_weight = 17; |
| fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); |
| if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) { |
| err = of_phy_register_fixed_link(ofdev->dev.of_node); |
| if (err) |
| goto out_free_fpi; |
| |
| /* In the case of a fixed PHY, the DT node associated |
| * to the PHY is the Ethernet MAC DT node. |
| */ |
| fpi->phy_node = of_node_get(ofdev->dev.of_node); |
| } |
| |
| 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)) { |
| ret = clk_prepare_enable(clk); |
| if (ret) |
| goto out_deregister_fixed_link; |
| |
| fpi->clk_per = clk; |
| } |
| |
| privsize = sizeof(*fep) + |
| sizeof(struct sk_buff **) * |
| (fpi->rx_ring + fpi->tx_ring) + |
| sizeof(char) * 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; |
| fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring + |
| fpi->tx_ring); |
| |
| spin_lock_init(&fep->lock); |
| spin_lock_init(&fep->tx_lock); |
| |
| of_get_ethdev_address(ofdev->dev.of_node, ndev); |
| |
| 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; |
| INIT_WORK(&fep->timeout_work, fs_timeout_work); |
| netif_napi_add_weight(ndev, &fep->napi, fs_enet_napi, |
| fpi->napi_weight); |
| |
| ndev->ethtool_ops = &fs_ethtool_ops; |
| |
| netif_carrier_off(ndev); |
| |
| ndev->features |= NETIF_F_SG; |
| |
| 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: |
| clk_disable_unprepare(fpi->clk_per); |
| out_deregister_fixed_link: |
| of_node_put(fpi->phy_node); |
| if (of_phy_is_fixed_link(ofdev->dev.of_node)) |
| of_phy_deregister_fixed_link(ofdev->dev.of_node); |
| 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); |
| clk_disable_unprepare(fep->fpi->clk_per); |
| if (of_phy_is_fixed_link(ofdev->dev.of_node)) |
| of_phy_deregister_fixed_link(ofdev->dev.of_node); |
| free_netdev(ndev); |
| return 0; |
| } |
| |
| static const 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 = { |
| .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); |