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, *skbt;
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);
170 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
173 skb_align(skbn, ENET_RX_ALIGN);
177 skb_put(skb, pkt_len); /* Make room */
178 skb->protocol = eth_type_trans(skb, dev);
180 netif_receive_skb(skb);
182 fep->stats.rx_dropped++;
187 fep->rx_skbuff[curidx] = skbn;
188 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
189 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
192 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
195 * Update BD pointer to next entry.
197 if ((sc & BD_ENET_RX_WRAP) == 0)
200 bdp = fep->rx_bd_base;
202 (*fep->ops->rx_bd_done)(dev);
204 if (received >= budget)
210 if (received < budget) {
213 (*fep->ops->napi_enable_rx)(dev);
218 static int fs_enet_tx_napi(struct napi_struct *napi, int budget)
220 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private,
222 struct net_device *dev = fep->ndev;
225 int dirtyidx, do_wake, do_restart;
229 spin_lock(&fep->tx_lock);
232 /* clear TX status bits for napi*/
233 (*fep->ops->napi_clear_tx_event)(dev);
235 do_wake = do_restart = 0;
236 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
237 dirtyidx = bdp - fep->tx_bd_base;
239 if (fep->tx_free == fep->tx_ring)
242 skb = fep->tx_skbuff[dirtyidx];
247 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
248 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
250 if (sc & BD_ENET_TX_HB) /* No heartbeat */
251 fep->stats.tx_heartbeat_errors++;
252 if (sc & BD_ENET_TX_LC) /* Late collision */
253 fep->stats.tx_window_errors++;
254 if (sc & BD_ENET_TX_RL) /* Retrans limit */
255 fep->stats.tx_aborted_errors++;
256 if (sc & BD_ENET_TX_UN) /* Underrun */
257 fep->stats.tx_fifo_errors++;
258 if (sc & BD_ENET_TX_CSL) /* Carrier lost */
259 fep->stats.tx_carrier_errors++;
261 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
262 fep->stats.tx_errors++;
266 fep->stats.tx_packets++;
268 if (sc & BD_ENET_TX_READY) {
270 "HEY! Enet xmit interrupt and TX_READY.\n");
274 * Deferred means some collisions occurred during transmit,
275 * but we eventually sent the packet OK.
277 if (sc & BD_ENET_TX_DEF)
278 fep->stats.collisions++;
281 if (fep->mapped_as_page[dirtyidx])
282 dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp),
283 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
285 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
286 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
289 * Free the sk buffer associated with this last transmit.
293 fep->tx_skbuff[dirtyidx] = NULL;
297 * Update pointer to next buffer descriptor to be transmitted.
299 if ((sc & BD_ENET_TX_WRAP) == 0)
302 bdp = fep->tx_bd_base;
305 * Since we have freed up a buffer, the ring is no longer
308 if (++fep->tx_free >= MAX_SKB_FRAGS)
316 (*fep->ops->tx_restart)(dev);
320 (*fep->ops->napi_enable_tx)(dev);
323 spin_unlock(&fep->tx_lock);
326 netif_wake_queue(dev);
334 * The interrupt handler.
335 * This is called from the MPC core interrupt.
338 fs_enet_interrupt(int irq, void *dev_id)
340 struct net_device *dev = dev_id;
341 struct fs_enet_private *fep;
342 const struct fs_platform_info *fpi;
348 fep = netdev_priv(dev);
352 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
355 int_clr_events = int_events;
356 int_clr_events &= ~fep->ev_napi_rx;
358 (*fep->ops->clear_int_events)(dev, int_clr_events);
360 if (int_events & fep->ev_err)
361 (*fep->ops->ev_error)(dev, int_events);
363 if (int_events & fep->ev_rx) {
364 napi_ok = napi_schedule_prep(&fep->napi);
366 (*fep->ops->napi_disable_rx)(dev);
367 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
369 /* NOTE: it is possible for FCCs in NAPI mode */
370 /* to submit a spurious interrupt while in poll */
372 __napi_schedule(&fep->napi);
375 if (int_events & fep->ev_tx) {
376 napi_ok = napi_schedule_prep(&fep->napi_tx);
378 (*fep->ops->napi_disable_tx)(dev);
379 (*fep->ops->clear_int_events)(dev, fep->ev_napi_tx);
381 /* NOTE: it is possible for FCCs in NAPI mode */
382 /* to submit a spurious interrupt while in poll */
384 __napi_schedule(&fep->napi_tx);
389 return IRQ_RETVAL(handled);
392 void fs_init_bds(struct net_device *dev)
394 struct fs_enet_private *fep = netdev_priv(dev);
401 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
402 fep->tx_free = fep->tx_ring;
403 fep->cur_rx = fep->rx_bd_base;
406 * Initialize the receive buffer descriptors.
408 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
409 skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
413 skb_align(skb, ENET_RX_ALIGN);
414 fep->rx_skbuff[i] = skb;
416 dma_map_single(fep->dev, skb->data,
417 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
419 CBDW_DATLEN(bdp, 0); /* zero */
420 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
421 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
424 * if we failed, fillup remainder
426 for (; i < fep->rx_ring; i++, bdp++) {
427 fep->rx_skbuff[i] = NULL;
428 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
432 * ...and the same for transmit.
434 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
435 fep->tx_skbuff[i] = NULL;
436 CBDW_BUFADDR(bdp, 0);
438 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
442 void fs_cleanup_bds(struct net_device *dev)
444 struct fs_enet_private *fep = netdev_priv(dev);
450 * Reset SKB transmit buffers.
452 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
453 if ((skb = fep->tx_skbuff[i]) == NULL)
457 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
458 skb->len, DMA_TO_DEVICE);
460 fep->tx_skbuff[i] = NULL;
465 * Reset SKB receive buffers
467 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
468 if ((skb = fep->rx_skbuff[i]) == NULL)
472 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
473 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
476 fep->rx_skbuff[i] = NULL;
482 /**********************************************************************************/
484 #ifdef CONFIG_FS_ENET_MPC5121_FEC
486 * MPC5121 FEC requeries 4-byte alignment for TX data buffer!
488 static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
491 struct sk_buff *new_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);
518 int nr_frags = skb_shinfo(skb)->nr_frags;
522 #ifdef CONFIG_FS_ENET_MPC5121_FEC
523 if (((unsigned long)skb->data) & 0x3) {
524 skb = tx_skb_align_workaround(dev, skb);
527 * We have lost packet due to memory allocation error
528 * in tx_skb_align_workaround(). Hopefully original
529 * skb is still valid, so try transmit it later.
531 return NETDEV_TX_BUSY;
535 spin_lock(&fep->tx_lock);
538 * Fill in a Tx ring entry
542 if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
543 netif_stop_queue(dev);
544 spin_unlock(&fep->tx_lock);
547 * Ooops. All transmit buffers are full. Bail out.
548 * This should not happen, since the tx queue should be stopped.
550 dev_warn(fep->dev, "tx queue full!.\n");
551 return NETDEV_TX_BUSY;
554 curidx = bdp - fep->tx_bd_base;
557 fep->stats.tx_bytes += len;
559 len -= skb->data_len;
560 fep->tx_free -= nr_frags + 1;
562 * Push the data cache so the CPM does not get stale memory data.
564 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
565 skb->data, len, DMA_TO_DEVICE));
566 CBDW_DATLEN(bdp, len);
568 fep->mapped_as_page[curidx] = 0;
569 frag = skb_shinfo(skb)->frags;
572 BD_ENET_TX_STATS | BD_ENET_TX_LAST | BD_ENET_TX_TC);
573 CBDS_SC(bdp, BD_ENET_TX_READY);
575 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
578 bdp = fep->tx_bd_base, curidx = 0;
580 len = skb_frag_size(frag);
581 CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,
583 CBDW_DATLEN(bdp, len);
585 fep->tx_skbuff[curidx] = NULL;
586 fep->mapped_as_page[curidx] = 1;
592 /* Trigger transmission start */
593 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
594 BD_ENET_TX_LAST | BD_ENET_TX_TC;
596 /* note that while FEC does not have this bit
597 * it marks it as available for software use
598 * yay for hw reuse :) */
600 sc |= BD_ENET_TX_PAD;
601 CBDC_SC(bdp, BD_ENET_TX_STATS);
604 /* Save skb pointer. */
605 fep->tx_skbuff[curidx] = skb;
607 /* If this was the last BD in the ring, start at the beginning again. */
608 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
611 bdp = fep->tx_bd_base;
614 if (fep->tx_free < MAX_SKB_FRAGS)
615 netif_stop_queue(dev);
617 skb_tx_timestamp(skb);
619 (*fep->ops->tx_kickstart)(dev);
621 spin_unlock(&fep->tx_lock);
626 static void fs_timeout(struct net_device *dev)
628 struct fs_enet_private *fep = netdev_priv(dev);
632 fep->stats.tx_errors++;
634 spin_lock_irqsave(&fep->lock, flags);
636 if (dev->flags & IFF_UP) {
637 phy_stop(fep->phydev);
638 (*fep->ops->stop)(dev);
639 (*fep->ops->restart)(dev);
640 phy_start(fep->phydev);
643 phy_start(fep->phydev);
644 wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
645 spin_unlock_irqrestore(&fep->lock, flags);
648 netif_wake_queue(dev);
651 /*-----------------------------------------------------------------------------
652 * generic link-change handler - should be sufficient for most cases
653 *-----------------------------------------------------------------------------*/
654 static void generic_adjust_link(struct net_device *dev)
656 struct fs_enet_private *fep = netdev_priv(dev);
657 struct phy_device *phydev = fep->phydev;
661 /* adjust to duplex mode */
662 if (phydev->duplex != fep->oldduplex) {
664 fep->oldduplex = phydev->duplex;
667 if (phydev->speed != fep->oldspeed) {
669 fep->oldspeed = phydev->speed;
678 fep->ops->restart(dev);
679 } else if (fep->oldlink) {
686 if (new_state && netif_msg_link(fep))
687 phy_print_status(phydev);
691 static void fs_adjust_link(struct net_device *dev)
693 struct fs_enet_private *fep = netdev_priv(dev);
696 spin_lock_irqsave(&fep->lock, flags);
698 if(fep->ops->adjust_link)
699 fep->ops->adjust_link(dev);
701 generic_adjust_link(dev);
703 spin_unlock_irqrestore(&fep->lock, flags);
706 static int fs_init_phy(struct net_device *dev)
708 struct fs_enet_private *fep = netdev_priv(dev);
709 struct phy_device *phydev;
710 phy_interface_t iface;
716 iface = fep->fpi->use_rmii ?
717 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII;
719 phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0,
722 dev_err(&dev->dev, "Could not attach to PHY\n");
726 fep->phydev = phydev;
731 static int fs_enet_open(struct net_device *dev)
733 struct fs_enet_private *fep = netdev_priv(dev);
737 /* to initialize the fep->cur_rx,... */
738 /* not doing this, will cause a crash in fs_enet_rx_napi */
739 fs_init_bds(fep->ndev);
741 napi_enable(&fep->napi);
742 napi_enable(&fep->napi_tx);
744 /* Install our interrupt handler. */
745 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
748 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
749 napi_disable(&fep->napi);
750 napi_disable(&fep->napi_tx);
754 err = fs_init_phy(dev);
756 free_irq(fep->interrupt, dev);
757 napi_disable(&fep->napi);
758 napi_disable(&fep->napi_tx);
761 phy_start(fep->phydev);
763 netif_start_queue(dev);
768 static int fs_enet_close(struct net_device *dev)
770 struct fs_enet_private *fep = netdev_priv(dev);
773 netif_stop_queue(dev);
774 netif_carrier_off(dev);
775 napi_disable(&fep->napi);
776 napi_disable(&fep->napi_tx);
777 phy_stop(fep->phydev);
779 spin_lock_irqsave(&fep->lock, flags);
780 spin_lock(&fep->tx_lock);
781 (*fep->ops->stop)(dev);
782 spin_unlock(&fep->tx_lock);
783 spin_unlock_irqrestore(&fep->lock, flags);
785 /* release any irqs */
786 phy_disconnect(fep->phydev);
788 free_irq(fep->interrupt, dev);
793 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
795 struct fs_enet_private *fep = netdev_priv(dev);
799 /*************************************************************************/
801 static void fs_get_drvinfo(struct net_device *dev,
802 struct ethtool_drvinfo *info)
804 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
805 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
808 static int fs_get_regs_len(struct net_device *dev)
810 struct fs_enet_private *fep = netdev_priv(dev);
812 return (*fep->ops->get_regs_len)(dev);
815 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
818 struct fs_enet_private *fep = netdev_priv(dev);
824 spin_lock_irqsave(&fep->lock, flags);
825 r = (*fep->ops->get_regs)(dev, p, &len);
826 spin_unlock_irqrestore(&fep->lock, flags);
832 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
834 struct fs_enet_private *fep = netdev_priv(dev);
839 return phy_ethtool_gset(fep->phydev, cmd);
842 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
844 struct fs_enet_private *fep = netdev_priv(dev);
849 return phy_ethtool_sset(fep->phydev, cmd);
852 static int fs_nway_reset(struct net_device *dev)
857 static u32 fs_get_msglevel(struct net_device *dev)
859 struct fs_enet_private *fep = netdev_priv(dev);
860 return fep->msg_enable;
863 static void fs_set_msglevel(struct net_device *dev, u32 value)
865 struct fs_enet_private *fep = netdev_priv(dev);
866 fep->msg_enable = value;
869 static const struct ethtool_ops fs_ethtool_ops = {
870 .get_drvinfo = fs_get_drvinfo,
871 .get_regs_len = fs_get_regs_len,
872 .get_settings = fs_get_settings,
873 .set_settings = fs_set_settings,
874 .nway_reset = fs_nway_reset,
875 .get_link = ethtool_op_get_link,
876 .get_msglevel = fs_get_msglevel,
877 .set_msglevel = fs_set_msglevel,
878 .get_regs = fs_get_regs,
879 .get_ts_info = ethtool_op_get_ts_info,
882 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
884 struct fs_enet_private *fep = netdev_priv(dev);
886 if (!netif_running(dev))
889 return phy_mii_ioctl(fep->phydev, rq, cmd);
892 extern int fs_mii_connect(struct net_device *dev);
893 extern void fs_mii_disconnect(struct net_device *dev);
895 /**************************************************************************************/
897 #ifdef CONFIG_FS_ENET_HAS_FEC
898 #define IS_FEC(match) ((match)->data == &fs_fec_ops)
900 #define IS_FEC(match) 0
903 static const struct net_device_ops fs_enet_netdev_ops = {
904 .ndo_open = fs_enet_open,
905 .ndo_stop = fs_enet_close,
906 .ndo_get_stats = fs_enet_get_stats,
907 .ndo_start_xmit = fs_enet_start_xmit,
908 .ndo_tx_timeout = fs_timeout,
909 .ndo_set_rx_mode = fs_set_multicast_list,
910 .ndo_do_ioctl = fs_ioctl,
911 .ndo_validate_addr = eth_validate_addr,
912 .ndo_set_mac_address = eth_mac_addr,
913 .ndo_change_mtu = eth_change_mtu,
914 #ifdef CONFIG_NET_POLL_CONTROLLER
915 .ndo_poll_controller = fs_enet_netpoll,
919 static const struct of_device_id fs_enet_match[];
920 static int fs_enet_probe(struct platform_device *ofdev)
922 const struct of_device_id *match;
923 struct net_device *ndev;
924 struct fs_enet_private *fep;
925 struct fs_platform_info *fpi;
930 const char *phy_connection_type;
931 int privsize, len, ret = -ENODEV;
933 match = of_match_device(fs_enet_match, &ofdev->dev);
937 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
941 if (!IS_FEC(match)) {
942 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
943 if (!data || len != 4)
946 fpi->cp_command = *data;
951 fpi->rx_copybreak = 240;
952 fpi->napi_weight = 17;
953 fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
954 if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) {
955 err = of_phy_register_fixed_link(ofdev->dev.of_node);
959 /* In the case of a fixed PHY, the DT node associated
960 * to the PHY is the Ethernet MAC DT node.
962 fpi->phy_node = of_node_get(ofdev->dev.of_node);
965 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
966 phy_connection_type = of_get_property(ofdev->dev.of_node,
967 "phy-connection-type", NULL);
968 if (phy_connection_type && !strcmp("rmii", phy_connection_type))
972 /* make clock lookup non-fatal (the driver is shared among platforms),
973 * but require enable to succeed when a clock was specified/found,
974 * keep a reference to the clock upon successful acquisition
976 clk = devm_clk_get(&ofdev->dev, "per");
978 err = clk_prepare_enable(clk);
986 privsize = sizeof(*fep) +
987 sizeof(struct sk_buff **) *
988 (fpi->rx_ring + fpi->tx_ring) +
989 sizeof(char) * fpi->tx_ring;
991 ndev = alloc_etherdev(privsize);
997 SET_NETDEV_DEV(ndev, &ofdev->dev);
998 platform_set_drvdata(ofdev, ndev);
1000 fep = netdev_priv(ndev);
1001 fep->dev = &ofdev->dev;
1004 fep->ops = match->data;
1006 ret = fep->ops->setup_data(ndev);
1010 fep->rx_skbuff = (struct sk_buff **)&fep[1];
1011 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1012 fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +
1015 spin_lock_init(&fep->lock);
1016 spin_lock_init(&fep->tx_lock);
1018 mac_addr = of_get_mac_address(ofdev->dev.of_node);
1020 memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
1022 ret = fep->ops->allocate_bd(ndev);
1024 goto out_cleanup_data;
1026 fep->rx_bd_base = fep->ring_base;
1027 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1029 fep->tx_ring = fpi->tx_ring;
1030 fep->rx_ring = fpi->rx_ring;
1032 ndev->netdev_ops = &fs_enet_netdev_ops;
1033 ndev->watchdog_timeo = 2 * HZ;
1034 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi, fpi->napi_weight);
1035 netif_napi_add(ndev, &fep->napi_tx, fs_enet_tx_napi, 2);
1037 ndev->ethtool_ops = &fs_ethtool_ops;
1039 init_timer(&fep->phy_timer_list);
1041 netif_carrier_off(ndev);
1043 ndev->features |= NETIF_F_SG;
1045 ret = register_netdev(ndev);
1049 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
1054 fep->ops->free_bd(ndev);
1056 fep->ops->cleanup_data(ndev);
1060 of_node_put(fpi->phy_node);
1062 clk_disable_unprepare(fpi->clk_per);
1068 static int fs_enet_remove(struct platform_device *ofdev)
1070 struct net_device *ndev = platform_get_drvdata(ofdev);
1071 struct fs_enet_private *fep = netdev_priv(ndev);
1073 unregister_netdev(ndev);
1075 fep->ops->free_bd(ndev);
1076 fep->ops->cleanup_data(ndev);
1077 dev_set_drvdata(fep->dev, NULL);
1078 of_node_put(fep->fpi->phy_node);
1079 if (fep->fpi->clk_per)
1080 clk_disable_unprepare(fep->fpi->clk_per);
1085 static const struct of_device_id fs_enet_match[] = {
1086 #ifdef CONFIG_FS_ENET_HAS_SCC
1088 .compatible = "fsl,cpm1-scc-enet",
1089 .data = (void *)&fs_scc_ops,
1092 .compatible = "fsl,cpm2-scc-enet",
1093 .data = (void *)&fs_scc_ops,
1096 #ifdef CONFIG_FS_ENET_HAS_FCC
1098 .compatible = "fsl,cpm2-fcc-enet",
1099 .data = (void *)&fs_fcc_ops,
1102 #ifdef CONFIG_FS_ENET_HAS_FEC
1103 #ifdef CONFIG_FS_ENET_MPC5121_FEC
1105 .compatible = "fsl,mpc5121-fec",
1106 .data = (void *)&fs_fec_ops,
1109 .compatible = "fsl,mpc5125-fec",
1110 .data = (void *)&fs_fec_ops,
1114 .compatible = "fsl,pq1-fec-enet",
1115 .data = (void *)&fs_fec_ops,
1121 MODULE_DEVICE_TABLE(of, fs_enet_match);
1123 static struct platform_driver fs_enet_driver = {
1126 .of_match_table = fs_enet_match,
1128 .probe = fs_enet_probe,
1129 .remove = fs_enet_remove,
1132 #ifdef CONFIG_NET_POLL_CONTROLLER
1133 static void fs_enet_netpoll(struct net_device *dev)
1135 disable_irq(dev->irq);
1136 fs_enet_interrupt(dev->irq, dev);
1137 enable_irq(dev->irq);
1141 module_platform_driver(fs_enet_driver);