--- /dev/null
+/*
+ * 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/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;
+
+ if (budget <= 0)
+ return received;
+
+ /*
+ * 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;
+}
+
+static int fs_enet_tx_napi(struct napi_struct *napi, int budget)
+{
+ struct fs_enet_private *fep = container_of(napi, struct fs_enet_private,
+ napi_tx);
+ struct net_device *dev = fep->ndev;
+ cbd_t __iomem *bdp;
+ struct sk_buff *skb;
+ int dirtyidx, do_wake, do_restart;
+ u16 sc;
+ int has_tx_work = 0;
+
+ spin_lock(&fep->tx_lock);
+ bdp = fep->dirty_tx;
+
+ /* clear TX status bits for napi*/
+ (*fep->ops->napi_clear_tx_event)(dev);
+
+ 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 */
+ 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;
+ has_tx_work = 1;
+ }
+
+ fep->dirty_tx = bdp;
+
+ if (do_restart)
+ (*fep->ops->tx_restart)(dev);
+
+ if (!has_tx_work) {
+ napi_complete(napi);
+ (*fep->ops->napi_enable_tx)(dev);
+ }
+
+ spin_unlock(&fep->tx_lock);
+
+ if (do_wake)
+ netif_wake_queue(dev);
+
+ if (has_tx_work)
+ return budget;
+ return 0;
+}
+
+/*
+ * 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_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) {
+ 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) {
+ napi_ok = napi_schedule_prep(&fep->napi_tx);
+
+ (*fep->ops->napi_disable_tx)(dev);
+ (*fep->ops->clear_int_events)(dev, fep->ev_napi_tx);
+
+ /* NOTE: it is possible for FCCs in NAPI mode */
+ /* to submit a spurious interrupt while in poll */
+ if (napi_ok)
+ __napi_schedule(&fep->napi_tx);
+ }
+ }
+
+ 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;
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ skb_frag_t *frag;
+ int len;
+
+#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(&fep->tx_lock);
+
+ /*
+ * Fill in a Tx ring entry
+ */
+ bdp = fep->cur_tx;
+
+ 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;
+ fep->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_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(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) {
+ 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);
+
+ napi_enable(&fep->napi);
+ napi_enable(&fep->napi_tx);
+
+ /* 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);
+ napi_disable(&fep->napi_tx);
+ return -EINVAL;
+ }
+
+ err = fs_init_phy(dev);
+ if (err) {
+ free_irq(fep->interrupt, dev);
+ napi_disable(&fep->napi);
+ napi_disable(&fep->napi_tx);
+ 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);
+ napi_disable(&fep->napi);
+ napi_disable(&fep->napi_tx);
+ 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 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 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 = 64;
+ 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)) {
+ 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) +
+ 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);
+
+ 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;
+ netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi, fpi->napi_weight);
+ netif_napi_add(ndev, &fep->napi_tx, fs_enet_tx_napi, 2);
+
+ ndev->ethtool_ops = &fs_ethtool_ops;
+
+ init_timer(&fep->phy_timer_list);
+
+ 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:
+ 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 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);
Code Review / kvmfornfv.git / blobdiff