2 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
4 * Copyright (c) 2003 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
7 * 2005 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
10 * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
11 * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
13 * This file is licensed under the terms of the GNU General Public License
14 * version 2. This program is licensed "as is" without any warranty of any
15 * kind, whether express or implied.
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/ptrace.h>
23 #include <linux/errno.h>
24 #include <linux/ioport.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/skbuff.h>
31 #include <linux/spinlock.h>
32 #include <linux/mii.h>
33 #include <linux/ethtool.h>
34 #include <linux/bitops.h>
36 #include <linux/platform_device.h>
37 #include <linux/phy.h>
39 #include <linux/of_mdio.h>
40 #include <linux/of_platform.h>
41 #include <linux/of_gpio.h>
42 #include <linux/of_net.h>
44 #include <linux/vmalloc.h>
45 #include <asm/pgtable.h>
47 #include <asm/uaccess.h>
51 /*************************************************/
53 MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
54 MODULE_DESCRIPTION("Freescale Ethernet Driver");
55 MODULE_LICENSE("GPL");
56 MODULE_VERSION(DRV_MODULE_VERSION);
58 static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
59 module_param(fs_enet_debug, int, 0);
60 MODULE_PARM_DESC(fs_enet_debug,
61 "Freescale bitmapped debugging message enable value");
63 #ifdef CONFIG_NET_POLL_CONTROLLER
64 static void fs_enet_netpoll(struct net_device *dev);
67 static void fs_set_multicast_list(struct net_device *dev)
69 struct fs_enet_private *fep = netdev_priv(dev);
71 (*fep->ops->set_multicast_list)(dev);
74 static void skb_align(struct sk_buff *skb, int align)
76 int off = ((unsigned long)skb->data) & (align - 1);
79 skb_reserve(skb, align - off);
82 /* NAPI receive function */
83 static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
85 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
86 struct net_device *dev = fep->ndev;
87 const struct fs_platform_info *fpi = fep->fpi;
89 struct sk_buff *skb, *skbn;
98 * First, grab all of the stats for the incoming packet.
99 * These get messed up if we get called due to a busy condition.
103 /* clear RX status bits for napi*/
104 (*fep->ops->napi_clear_rx_event)(dev);
106 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
107 curidx = bdp - fep->rx_bd_base;
110 * Since we have allocated space to hold a complete frame,
111 * the last indicator should be set.
113 if ((sc & BD_ENET_RX_LAST) == 0)
114 dev_warn(fep->dev, "rcv is not +last\n");
119 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
120 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
121 fep->stats.rx_errors++;
122 /* Frame too long or too short. */
123 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
124 fep->stats.rx_length_errors++;
125 /* Frame alignment */
126 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
127 fep->stats.rx_frame_errors++;
129 if (sc & BD_ENET_RX_CR)
130 fep->stats.rx_crc_errors++;
132 if (sc & BD_ENET_RX_OV)
133 fep->stats.rx_crc_errors++;
135 skb = fep->rx_skbuff[curidx];
137 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
138 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
144 skb = fep->rx_skbuff[curidx];
146 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
147 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
151 * Process the incoming frame.
153 fep->stats.rx_packets++;
154 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
155 fep->stats.rx_bytes += pkt_len + 4;
157 if (pkt_len <= fpi->rx_copybreak) {
158 /* +2 to make IP header L1 cache aligned */
159 skbn = netdev_alloc_skb(dev, pkt_len + 2);
161 skb_reserve(skbn, 2); /* align IP header */
162 skb_copy_from_linear_data(skb,
163 skbn->data, pkt_len);
167 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
170 skb_align(skbn, ENET_RX_ALIGN);
174 skb_put(skb, pkt_len); /* Make room */
175 skb->protocol = eth_type_trans(skb, dev);
177 netif_receive_skb(skb);
179 fep->stats.rx_dropped++;
184 fep->rx_skbuff[curidx] = skbn;
185 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
186 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
189 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
192 * Update BD pointer to next entry.
194 if ((sc & BD_ENET_RX_WRAP) == 0)
197 bdp = fep->rx_bd_base;
199 (*fep->ops->rx_bd_done)(dev);
201 if (received >= budget)
207 if (received < budget) {
210 (*fep->ops->napi_enable_rx)(dev);
215 static int fs_enet_tx_napi(struct napi_struct *napi, int budget)
217 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private,
219 struct net_device *dev = fep->ndev;
222 int dirtyidx, do_wake, do_restart;
226 spin_lock(&fep->tx_lock);
229 /* clear TX status bits for napi*/
230 (*fep->ops->napi_clear_tx_event)(dev);
232 do_wake = do_restart = 0;
233 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
234 dirtyidx = bdp - fep->tx_bd_base;
236 if (fep->tx_free == fep->tx_ring)
239 skb = fep->tx_skbuff[dirtyidx];
244 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
245 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
247 if (sc & BD_ENET_TX_HB) /* No heartbeat */
248 fep->stats.tx_heartbeat_errors++;
249 if (sc & BD_ENET_TX_LC) /* Late collision */
250 fep->stats.tx_window_errors++;
251 if (sc & BD_ENET_TX_RL) /* Retrans limit */
252 fep->stats.tx_aborted_errors++;
253 if (sc & BD_ENET_TX_UN) /* Underrun */
254 fep->stats.tx_fifo_errors++;
255 if (sc & BD_ENET_TX_CSL) /* Carrier lost */
256 fep->stats.tx_carrier_errors++;
258 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
259 fep->stats.tx_errors++;
263 fep->stats.tx_packets++;
265 if (sc & BD_ENET_TX_READY) {
267 "HEY! Enet xmit interrupt and TX_READY.\n");
271 * Deferred means some collisions occurred during transmit,
272 * but we eventually sent the packet OK.
274 if (sc & BD_ENET_TX_DEF)
275 fep->stats.collisions++;
278 if (fep->mapped_as_page[dirtyidx])
279 dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp),
280 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
282 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
283 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
286 * Free the sk buffer associated with this last transmit.
290 fep->tx_skbuff[dirtyidx] = NULL;
294 * Update pointer to next buffer descriptor to be transmitted.
296 if ((sc & BD_ENET_TX_WRAP) == 0)
299 bdp = fep->tx_bd_base;
302 * Since we have freed up a buffer, the ring is no longer
305 if (++fep->tx_free >= MAX_SKB_FRAGS)
313 (*fep->ops->tx_restart)(dev);
317 (*fep->ops->napi_enable_tx)(dev);
320 spin_unlock(&fep->tx_lock);
323 netif_wake_queue(dev);
331 * The interrupt handler.
332 * This is called from the MPC core interrupt.
335 fs_enet_interrupt(int irq, void *dev_id)
337 struct net_device *dev = dev_id;
338 struct fs_enet_private *fep;
339 const struct fs_platform_info *fpi;
345 fep = netdev_priv(dev);
349 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
352 int_clr_events = int_events;
353 int_clr_events &= ~fep->ev_napi_rx;
355 (*fep->ops->clear_int_events)(dev, int_clr_events);
357 if (int_events & fep->ev_err)
358 (*fep->ops->ev_error)(dev, int_events);
360 if (int_events & fep->ev_rx) {
361 napi_ok = napi_schedule_prep(&fep->napi);
363 (*fep->ops->napi_disable_rx)(dev);
364 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
366 /* NOTE: it is possible for FCCs in NAPI mode */
367 /* to submit a spurious interrupt while in poll */
369 __napi_schedule(&fep->napi);
372 if (int_events & fep->ev_tx) {
373 napi_ok = napi_schedule_prep(&fep->napi_tx);
375 (*fep->ops->napi_disable_tx)(dev);
376 (*fep->ops->clear_int_events)(dev, fep->ev_napi_tx);
378 /* NOTE: it is possible for FCCs in NAPI mode */
379 /* to submit a spurious interrupt while in poll */
381 __napi_schedule(&fep->napi_tx);
386 return IRQ_RETVAL(handled);
389 void fs_init_bds(struct net_device *dev)
391 struct fs_enet_private *fep = netdev_priv(dev);
398 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
399 fep->tx_free = fep->tx_ring;
400 fep->cur_rx = fep->rx_bd_base;
403 * Initialize the receive buffer descriptors.
405 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
406 skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
410 skb_align(skb, ENET_RX_ALIGN);
411 fep->rx_skbuff[i] = skb;
413 dma_map_single(fep->dev, skb->data,
414 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
416 CBDW_DATLEN(bdp, 0); /* zero */
417 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
418 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
421 * if we failed, fillup remainder
423 for (; i < fep->rx_ring; i++, bdp++) {
424 fep->rx_skbuff[i] = NULL;
425 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
429 * ...and the same for transmit.
431 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
432 fep->tx_skbuff[i] = NULL;
433 CBDW_BUFADDR(bdp, 0);
435 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
439 void fs_cleanup_bds(struct net_device *dev)
441 struct fs_enet_private *fep = netdev_priv(dev);
447 * Reset SKB transmit buffers.
449 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
450 if ((skb = fep->tx_skbuff[i]) == NULL)
454 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
455 skb->len, DMA_TO_DEVICE);
457 fep->tx_skbuff[i] = NULL;
462 * Reset SKB receive buffers
464 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
465 if ((skb = fep->rx_skbuff[i]) == NULL)
469 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
470 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
473 fep->rx_skbuff[i] = NULL;
479 /**********************************************************************************/
481 #ifdef CONFIG_FS_ENET_MPC5121_FEC
483 * MPC5121 FEC requeries 4-byte alignment for TX data buffer!
485 static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
488 struct sk_buff *new_skb;
490 if (skb_linearize(skb))
494 new_skb = netdev_alloc_skb(dev, skb->len + 4);
498 /* Make sure new skb is properly aligned */
499 skb_align(new_skb, 4);
501 /* Copy data to new skb ... */
502 skb_copy_from_linear_data(skb, new_skb->data, skb->len);
503 skb_put(new_skb, skb->len);
505 /* ... and free an old one */
506 dev_kfree_skb_any(skb);
512 static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
514 struct fs_enet_private *fep = netdev_priv(dev);
521 #ifdef CONFIG_FS_ENET_MPC5121_FEC
525 if (!IS_ALIGNED((unsigned long)skb->data, 4)) {
528 nr_frags = skb_shinfo(skb)->nr_frags;
529 frag = skb_shinfo(skb)->frags;
530 for (i = 0; i < nr_frags; i++, frag++) {
531 if (!IS_ALIGNED(frag->page_offset, 4)) {
539 skb = tx_skb_align_workaround(dev, skb);
542 * We have lost packet due to memory allocation error
543 * in tx_skb_align_workaround(). Hopefully original
544 * skb is still valid, so try transmit it later.
546 return NETDEV_TX_BUSY;
551 spin_lock(&fep->tx_lock);
554 * Fill in a Tx ring entry
558 nr_frags = skb_shinfo(skb)->nr_frags;
559 if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
560 netif_stop_queue(dev);
561 spin_unlock(&fep->tx_lock);
564 * Ooops. All transmit buffers are full. Bail out.
565 * This should not happen, since the tx queue should be stopped.
567 dev_warn(fep->dev, "tx queue full!.\n");
568 return NETDEV_TX_BUSY;
571 curidx = bdp - fep->tx_bd_base;
574 fep->stats.tx_bytes += len;
576 len -= skb->data_len;
577 fep->tx_free -= nr_frags + 1;
579 * Push the data cache so the CPM does not get stale memory data.
581 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
582 skb->data, len, DMA_TO_DEVICE));
583 CBDW_DATLEN(bdp, len);
585 fep->mapped_as_page[curidx] = 0;
586 frag = skb_shinfo(skb)->frags;
589 BD_ENET_TX_STATS | BD_ENET_TX_LAST | BD_ENET_TX_TC);
590 CBDS_SC(bdp, BD_ENET_TX_READY);
592 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
595 bdp = fep->tx_bd_base, curidx = 0;
597 len = skb_frag_size(frag);
598 CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,
600 CBDW_DATLEN(bdp, len);
602 fep->tx_skbuff[curidx] = NULL;
603 fep->mapped_as_page[curidx] = 1;
609 /* Trigger transmission start */
610 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
611 BD_ENET_TX_LAST | BD_ENET_TX_TC;
613 /* note that while FEC does not have this bit
614 * it marks it as available for software use
615 * yay for hw reuse :) */
617 sc |= BD_ENET_TX_PAD;
618 CBDC_SC(bdp, BD_ENET_TX_STATS);
621 /* Save skb pointer. */
622 fep->tx_skbuff[curidx] = skb;
624 /* If this was the last BD in the ring, start at the beginning again. */
625 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
628 bdp = fep->tx_bd_base;
631 if (fep->tx_free < MAX_SKB_FRAGS)
632 netif_stop_queue(dev);
634 skb_tx_timestamp(skb);
636 (*fep->ops->tx_kickstart)(dev);
638 spin_unlock(&fep->tx_lock);
643 static void fs_timeout(struct net_device *dev)
645 struct fs_enet_private *fep = netdev_priv(dev);
649 fep->stats.tx_errors++;
651 spin_lock_irqsave(&fep->lock, flags);
653 if (dev->flags & IFF_UP) {
654 phy_stop(fep->phydev);
655 (*fep->ops->stop)(dev);
656 (*fep->ops->restart)(dev);
657 phy_start(fep->phydev);
660 phy_start(fep->phydev);
661 wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
662 spin_unlock_irqrestore(&fep->lock, flags);
665 netif_wake_queue(dev);
668 /*-----------------------------------------------------------------------------
669 * generic link-change handler - should be sufficient for most cases
670 *-----------------------------------------------------------------------------*/
671 static void generic_adjust_link(struct net_device *dev)
673 struct fs_enet_private *fep = netdev_priv(dev);
674 struct phy_device *phydev = fep->phydev;
678 /* adjust to duplex mode */
679 if (phydev->duplex != fep->oldduplex) {
681 fep->oldduplex = phydev->duplex;
684 if (phydev->speed != fep->oldspeed) {
686 fep->oldspeed = phydev->speed;
695 fep->ops->restart(dev);
696 } else if (fep->oldlink) {
703 if (new_state && netif_msg_link(fep))
704 phy_print_status(phydev);
708 static void fs_adjust_link(struct net_device *dev)
710 struct fs_enet_private *fep = netdev_priv(dev);
713 spin_lock_irqsave(&fep->lock, flags);
715 if(fep->ops->adjust_link)
716 fep->ops->adjust_link(dev);
718 generic_adjust_link(dev);
720 spin_unlock_irqrestore(&fep->lock, flags);
723 static int fs_init_phy(struct net_device *dev)
725 struct fs_enet_private *fep = netdev_priv(dev);
726 struct phy_device *phydev;
727 phy_interface_t iface;
733 iface = fep->fpi->use_rmii ?
734 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII;
736 phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0,
739 dev_err(&dev->dev, "Could not attach to PHY\n");
743 fep->phydev = phydev;
748 static int fs_enet_open(struct net_device *dev)
750 struct fs_enet_private *fep = netdev_priv(dev);
754 /* to initialize the fep->cur_rx,... */
755 /* not doing this, will cause a crash in fs_enet_rx_napi */
756 fs_init_bds(fep->ndev);
758 napi_enable(&fep->napi);
759 napi_enable(&fep->napi_tx);
761 /* Install our interrupt handler. */
762 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
765 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
766 napi_disable(&fep->napi);
767 napi_disable(&fep->napi_tx);
771 err = fs_init_phy(dev);
773 free_irq(fep->interrupt, dev);
774 napi_disable(&fep->napi);
775 napi_disable(&fep->napi_tx);
778 phy_start(fep->phydev);
780 netif_start_queue(dev);
785 static int fs_enet_close(struct net_device *dev)
787 struct fs_enet_private *fep = netdev_priv(dev);
790 netif_stop_queue(dev);
791 netif_carrier_off(dev);
792 napi_disable(&fep->napi);
793 napi_disable(&fep->napi_tx);
794 phy_stop(fep->phydev);
796 spin_lock_irqsave(&fep->lock, flags);
797 spin_lock(&fep->tx_lock);
798 (*fep->ops->stop)(dev);
799 spin_unlock(&fep->tx_lock);
800 spin_unlock_irqrestore(&fep->lock, flags);
802 /* release any irqs */
803 phy_disconnect(fep->phydev);
805 free_irq(fep->interrupt, dev);
810 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
812 struct fs_enet_private *fep = netdev_priv(dev);
816 /*************************************************************************/
818 static void fs_get_drvinfo(struct net_device *dev,
819 struct ethtool_drvinfo *info)
821 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
822 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
825 static int fs_get_regs_len(struct net_device *dev)
827 struct fs_enet_private *fep = netdev_priv(dev);
829 return (*fep->ops->get_regs_len)(dev);
832 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
835 struct fs_enet_private *fep = netdev_priv(dev);
841 spin_lock_irqsave(&fep->lock, flags);
842 r = (*fep->ops->get_regs)(dev, p, &len);
843 spin_unlock_irqrestore(&fep->lock, flags);
849 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
851 struct fs_enet_private *fep = netdev_priv(dev);
856 return phy_ethtool_gset(fep->phydev, cmd);
859 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
861 struct fs_enet_private *fep = netdev_priv(dev);
866 return phy_ethtool_sset(fep->phydev, cmd);
869 static int fs_nway_reset(struct net_device *dev)
874 static u32 fs_get_msglevel(struct net_device *dev)
876 struct fs_enet_private *fep = netdev_priv(dev);
877 return fep->msg_enable;
880 static void fs_set_msglevel(struct net_device *dev, u32 value)
882 struct fs_enet_private *fep = netdev_priv(dev);
883 fep->msg_enable = value;
886 static const struct ethtool_ops fs_ethtool_ops = {
887 .get_drvinfo = fs_get_drvinfo,
888 .get_regs_len = fs_get_regs_len,
889 .get_settings = fs_get_settings,
890 .set_settings = fs_set_settings,
891 .nway_reset = fs_nway_reset,
892 .get_link = ethtool_op_get_link,
893 .get_msglevel = fs_get_msglevel,
894 .set_msglevel = fs_set_msglevel,
895 .get_regs = fs_get_regs,
896 .get_ts_info = ethtool_op_get_ts_info,
899 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
901 struct fs_enet_private *fep = netdev_priv(dev);
903 if (!netif_running(dev))
906 return phy_mii_ioctl(fep->phydev, rq, cmd);
909 extern int fs_mii_connect(struct net_device *dev);
910 extern void fs_mii_disconnect(struct net_device *dev);
912 /**************************************************************************************/
914 #ifdef CONFIG_FS_ENET_HAS_FEC
915 #define IS_FEC(match) ((match)->data == &fs_fec_ops)
917 #define IS_FEC(match) 0
920 static const struct net_device_ops fs_enet_netdev_ops = {
921 .ndo_open = fs_enet_open,
922 .ndo_stop = fs_enet_close,
923 .ndo_get_stats = fs_enet_get_stats,
924 .ndo_start_xmit = fs_enet_start_xmit,
925 .ndo_tx_timeout = fs_timeout,
926 .ndo_set_rx_mode = fs_set_multicast_list,
927 .ndo_do_ioctl = fs_ioctl,
928 .ndo_validate_addr = eth_validate_addr,
929 .ndo_set_mac_address = eth_mac_addr,
930 .ndo_change_mtu = eth_change_mtu,
931 #ifdef CONFIG_NET_POLL_CONTROLLER
932 .ndo_poll_controller = fs_enet_netpoll,
936 static const struct of_device_id fs_enet_match[];
937 static int fs_enet_probe(struct platform_device *ofdev)
939 const struct of_device_id *match;
940 struct net_device *ndev;
941 struct fs_enet_private *fep;
942 struct fs_platform_info *fpi;
947 const char *phy_connection_type;
948 int privsize, len, ret = -ENODEV;
950 match = of_match_device(fs_enet_match, &ofdev->dev);
954 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
958 if (!IS_FEC(match)) {
959 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
960 if (!data || len != 4)
963 fpi->cp_command = *data;
968 fpi->rx_copybreak = 240;
969 fpi->napi_weight = 17;
970 fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
971 if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) {
972 err = of_phy_register_fixed_link(ofdev->dev.of_node);
976 /* In the case of a fixed PHY, the DT node associated
977 * to the PHY is the Ethernet MAC DT node.
979 fpi->phy_node = of_node_get(ofdev->dev.of_node);
982 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
983 phy_connection_type = of_get_property(ofdev->dev.of_node,
984 "phy-connection-type", NULL);
985 if (phy_connection_type && !strcmp("rmii", phy_connection_type))
989 /* make clock lookup non-fatal (the driver is shared among platforms),
990 * but require enable to succeed when a clock was specified/found,
991 * keep a reference to the clock upon successful acquisition
993 clk = devm_clk_get(&ofdev->dev, "per");
995 err = clk_prepare_enable(clk);
1003 privsize = sizeof(*fep) +
1004 sizeof(struct sk_buff **) *
1005 (fpi->rx_ring + fpi->tx_ring) +
1006 sizeof(char) * fpi->tx_ring;
1008 ndev = alloc_etherdev(privsize);
1014 SET_NETDEV_DEV(ndev, &ofdev->dev);
1015 platform_set_drvdata(ofdev, ndev);
1017 fep = netdev_priv(ndev);
1018 fep->dev = &ofdev->dev;
1021 fep->ops = match->data;
1023 ret = fep->ops->setup_data(ndev);
1027 fep->rx_skbuff = (struct sk_buff **)&fep[1];
1028 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1029 fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +
1032 spin_lock_init(&fep->lock);
1033 spin_lock_init(&fep->tx_lock);
1035 mac_addr = of_get_mac_address(ofdev->dev.of_node);
1037 memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
1039 ret = fep->ops->allocate_bd(ndev);
1041 goto out_cleanup_data;
1043 fep->rx_bd_base = fep->ring_base;
1044 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1046 fep->tx_ring = fpi->tx_ring;
1047 fep->rx_ring = fpi->rx_ring;
1049 ndev->netdev_ops = &fs_enet_netdev_ops;
1050 ndev->watchdog_timeo = 2 * HZ;
1051 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi, fpi->napi_weight);
1052 netif_napi_add(ndev, &fep->napi_tx, fs_enet_tx_napi, 2);
1054 ndev->ethtool_ops = &fs_ethtool_ops;
1056 init_timer(&fep->phy_timer_list);
1058 netif_carrier_off(ndev);
1060 ndev->features |= NETIF_F_SG;
1062 ret = register_netdev(ndev);
1066 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
1071 fep->ops->free_bd(ndev);
1073 fep->ops->cleanup_data(ndev);
1077 of_node_put(fpi->phy_node);
1079 clk_disable_unprepare(fpi->clk_per);
1085 static int fs_enet_remove(struct platform_device *ofdev)
1087 struct net_device *ndev = platform_get_drvdata(ofdev);
1088 struct fs_enet_private *fep = netdev_priv(ndev);
1090 unregister_netdev(ndev);
1092 fep->ops->free_bd(ndev);
1093 fep->ops->cleanup_data(ndev);
1094 dev_set_drvdata(fep->dev, NULL);
1095 of_node_put(fep->fpi->phy_node);
1096 if (fep->fpi->clk_per)
1097 clk_disable_unprepare(fep->fpi->clk_per);
1102 static const struct of_device_id fs_enet_match[] = {
1103 #ifdef CONFIG_FS_ENET_HAS_SCC
1105 .compatible = "fsl,cpm1-scc-enet",
1106 .data = (void *)&fs_scc_ops,
1109 .compatible = "fsl,cpm2-scc-enet",
1110 .data = (void *)&fs_scc_ops,
1113 #ifdef CONFIG_FS_ENET_HAS_FCC
1115 .compatible = "fsl,cpm2-fcc-enet",
1116 .data = (void *)&fs_fcc_ops,
1119 #ifdef CONFIG_FS_ENET_HAS_FEC
1120 #ifdef CONFIG_FS_ENET_MPC5121_FEC
1122 .compatible = "fsl,mpc5121-fec",
1123 .data = (void *)&fs_fec_ops,
1126 .compatible = "fsl,mpc5125-fec",
1127 .data = (void *)&fs_fec_ops,
1131 .compatible = "fsl,pq1-fec-enet",
1132 .data = (void *)&fs_fec_ops,
1138 MODULE_DEVICE_TABLE(of, fs_enet_match);
1140 static struct platform_driver fs_enet_driver = {
1143 .of_match_table = fs_enet_match,
1145 .probe = fs_enet_probe,
1146 .remove = fs_enet_remove,
1149 #ifdef CONFIG_NET_POLL_CONTROLLER
1150 static void fs_enet_netpoll(struct net_device *dev)
1152 disable_irq(dev->irq);
1153 fs_enet_interrupt(dev->irq, dev);
1154 enable_irq(dev->irq);
1158 module_platform_driver(fs_enet_driver);