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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>
35#include <linux/fs.h>
36#include <linux/platform_device.h>
37#include <linux/phy.h>
38#include <linux/of.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>
43
44#include <linux/vmalloc.h>
45#include <asm/pgtable.h>
46#include <asm/irq.h>
47#include <linux/uaccess.h>
48
49#include "fs_enet.h"
50
51
52
53MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
54MODULE_DESCRIPTION("Freescale Ethernet Driver");
55MODULE_LICENSE("GPL");
56MODULE_VERSION(DRV_MODULE_VERSION);
57
58static int fs_enet_debug = -1;
59module_param(fs_enet_debug, int, 0);
60MODULE_PARM_DESC(fs_enet_debug,
61 "Freescale bitmapped debugging message enable value");
62
63#define RX_RING_SIZE 32
64#define TX_RING_SIZE 64
65
66#ifdef CONFIG_NET_POLL_CONTROLLER
67static void fs_enet_netpoll(struct net_device *dev);
68#endif
69
70static void fs_set_multicast_list(struct net_device *dev)
71{
72 struct fs_enet_private *fep = netdev_priv(dev);
73
74 (*fep->ops->set_multicast_list)(dev);
75}
76
77static void skb_align(struct sk_buff *skb, int align)
78{
79 int off = ((unsigned long)skb->data) & (align - 1);
80
81 if (off)
82 skb_reserve(skb, align - off);
83}
84
85
86static int fs_enet_napi(struct napi_struct *napi, int budget)
87{
88 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
89 struct net_device *dev = fep->ndev;
90 const struct fs_platform_info *fpi = fep->fpi;
91 cbd_t __iomem *bdp;
92 struct sk_buff *skb, *skbn;
93 int received = 0;
94 u16 pkt_len, sc;
95 int curidx;
96 int dirtyidx, do_wake, do_restart;
97 int tx_left = TX_RING_SIZE;
98
99 spin_lock(&fep->tx_lock);
100 bdp = fep->dirty_tx;
101
102
103 (*fep->ops->napi_clear_event)(dev);
104
105 do_wake = do_restart = 0;
106 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) {
107 dirtyidx = bdp - fep->tx_bd_base;
108
109 if (fep->tx_free == fep->tx_ring)
110 break;
111
112 skb = fep->tx_skbuff[dirtyidx];
113
114
115
116
117 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
118 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
119
120 if (sc & BD_ENET_TX_HB)
121 dev->stats.tx_heartbeat_errors++;
122 if (sc & BD_ENET_TX_LC)
123 dev->stats.tx_window_errors++;
124 if (sc & BD_ENET_TX_RL)
125 dev->stats.tx_aborted_errors++;
126 if (sc & BD_ENET_TX_UN)
127 dev->stats.tx_fifo_errors++;
128 if (sc & BD_ENET_TX_CSL)
129 dev->stats.tx_carrier_errors++;
130
131 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
132 dev->stats.tx_errors++;
133 do_restart = 1;
134 }
135 } else
136 dev->stats.tx_packets++;
137
138 if (sc & BD_ENET_TX_READY) {
139 dev_warn(fep->dev,
140 "HEY! Enet xmit interrupt and TX_READY.\n");
141 }
142
143
144
145
146
147 if (sc & BD_ENET_TX_DEF)
148 dev->stats.collisions++;
149
150
151 if (fep->mapped_as_page[dirtyidx])
152 dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp),
153 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
154 else
155 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
156 CBDR_DATLEN(bdp), DMA_TO_DEVICE);
157
158
159
160
161 if (skb) {
162 dev_kfree_skb(skb);
163 fep->tx_skbuff[dirtyidx] = NULL;
164 }
165
166
167
168
169 if ((sc & BD_ENET_TX_WRAP) == 0)
170 bdp++;
171 else
172 bdp = fep->tx_bd_base;
173
174
175
176
177
178 if (++fep->tx_free == MAX_SKB_FRAGS)
179 do_wake = 1;
180 tx_left--;
181 }
182
183 fep->dirty_tx = bdp;
184
185 if (do_restart)
186 (*fep->ops->tx_restart)(dev);
187
188 spin_unlock(&fep->tx_lock);
189
190 if (do_wake)
191 netif_wake_queue(dev);
192
193
194
195
196
197 bdp = fep->cur_rx;
198
199 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0 &&
200 received < budget) {
201 curidx = bdp - fep->rx_bd_base;
202
203
204
205
206
207 if ((sc & BD_ENET_RX_LAST) == 0)
208 dev_warn(fep->dev, "rcv is not +last\n");
209
210
211
212
213 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
214 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
215 dev->stats.rx_errors++;
216
217 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
218 dev->stats.rx_length_errors++;
219
220 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
221 dev->stats.rx_frame_errors++;
222
223 if (sc & BD_ENET_RX_CR)
224 dev->stats.rx_crc_errors++;
225
226 if (sc & BD_ENET_RX_OV)
227 dev->stats.rx_crc_errors++;
228
229 skbn = fep->rx_skbuff[curidx];
230 } else {
231 skb = fep->rx_skbuff[curidx];
232
233
234
235
236 dev->stats.rx_packets++;
237 pkt_len = CBDR_DATLEN(bdp) - 4;
238 dev->stats.rx_bytes += pkt_len + 4;
239
240 if (pkt_len <= fpi->rx_copybreak) {
241
242 skbn = netdev_alloc_skb(dev, pkt_len + 2);
243 if (skbn != NULL) {
244 skb_reserve(skbn, 2);
245 skb_copy_from_linear_data(skb,
246 skbn->data, pkt_len);
247 swap(skb, skbn);
248 dma_sync_single_for_cpu(fep->dev,
249 CBDR_BUFADDR(bdp),
250 L1_CACHE_ALIGN(pkt_len),
251 DMA_FROM_DEVICE);
252 }
253 } else {
254 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
255
256 if (skbn) {
257 dma_addr_t dma;
258
259 skb_align(skbn, ENET_RX_ALIGN);
260
261 dma_unmap_single(fep->dev,
262 CBDR_BUFADDR(bdp),
263 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
264 DMA_FROM_DEVICE);
265
266 dma = dma_map_single(fep->dev,
267 skbn->data,
268 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
269 DMA_FROM_DEVICE);
270 CBDW_BUFADDR(bdp, dma);
271 }
272 }
273
274 if (skbn != NULL) {
275 skb_put(skb, pkt_len);
276 skb->protocol = eth_type_trans(skb, dev);
277 received++;
278 netif_receive_skb(skb);
279 } else {
280 dev->stats.rx_dropped++;
281 skbn = skb;
282 }
283 }
284
285 fep->rx_skbuff[curidx] = skbn;
286 CBDW_DATLEN(bdp, 0);
287 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
288
289
290
291
292 if ((sc & BD_ENET_RX_WRAP) == 0)
293 bdp++;
294 else
295 bdp = fep->rx_bd_base;
296
297 (*fep->ops->rx_bd_done)(dev);
298 }
299
300 fep->cur_rx = bdp;
301
302 if (received < budget && tx_left) {
303
304 napi_complete_done(napi, received);
305 (*fep->ops->napi_enable)(dev);
306
307 return received;
308 }
309
310 return budget;
311}
312
313
314
315
316
317static irqreturn_t
318fs_enet_interrupt(int irq, void *dev_id)
319{
320 struct net_device *dev = dev_id;
321 struct fs_enet_private *fep;
322 const struct fs_platform_info *fpi;
323 u32 int_events;
324 u32 int_clr_events;
325 int nr, napi_ok;
326 int handled;
327
328 fep = netdev_priv(dev);
329 fpi = fep->fpi;
330
331 nr = 0;
332 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
333 nr++;
334
335 int_clr_events = int_events;
336 int_clr_events &= ~fep->ev_napi;
337
338 (*fep->ops->clear_int_events)(dev, int_clr_events);
339
340 if (int_events & fep->ev_err)
341 (*fep->ops->ev_error)(dev, int_events);
342
343 if (int_events & fep->ev) {
344 napi_ok = napi_schedule_prep(&fep->napi);
345
346 (*fep->ops->napi_disable)(dev);
347 (*fep->ops->clear_int_events)(dev, fep->ev_napi);
348
349
350
351 if (napi_ok)
352 __napi_schedule(&fep->napi);
353 }
354
355 }
356
357 handled = nr > 0;
358 return IRQ_RETVAL(handled);
359}
360
361void fs_init_bds(struct net_device *dev)
362{
363 struct fs_enet_private *fep = netdev_priv(dev);
364 cbd_t __iomem *bdp;
365 struct sk_buff *skb;
366 int i;
367
368 fs_cleanup_bds(dev);
369
370 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
371 fep->tx_free = fep->tx_ring;
372 fep->cur_rx = fep->rx_bd_base;
373
374
375
376
377 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
378 skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
379 if (skb == NULL)
380 break;
381
382 skb_align(skb, ENET_RX_ALIGN);
383 fep->rx_skbuff[i] = skb;
384 CBDW_BUFADDR(bdp,
385 dma_map_single(fep->dev, skb->data,
386 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
387 DMA_FROM_DEVICE));
388 CBDW_DATLEN(bdp, 0);
389 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
390 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
391 }
392
393
394
395 for (; i < fep->rx_ring; i++, bdp++) {
396 fep->rx_skbuff[i] = NULL;
397 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
398 }
399
400
401
402
403 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
404 fep->tx_skbuff[i] = NULL;
405 CBDW_BUFADDR(bdp, 0);
406 CBDW_DATLEN(bdp, 0);
407 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
408 }
409}
410
411void fs_cleanup_bds(struct net_device *dev)
412{
413 struct fs_enet_private *fep = netdev_priv(dev);
414 struct sk_buff *skb;
415 cbd_t __iomem *bdp;
416 int i;
417
418
419
420
421 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
422 if ((skb = fep->tx_skbuff[i]) == NULL)
423 continue;
424
425
426 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
427 skb->len, DMA_TO_DEVICE);
428
429 fep->tx_skbuff[i] = NULL;
430 dev_kfree_skb(skb);
431 }
432
433
434
435
436 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
437 if ((skb = fep->rx_skbuff[i]) == NULL)
438 continue;
439
440
441 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
442 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
443 DMA_FROM_DEVICE);
444
445 fep->rx_skbuff[i] = NULL;
446
447 dev_kfree_skb(skb);
448 }
449}
450
451
452
453#ifdef CONFIG_FS_ENET_MPC5121_FEC
454
455
456
457static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
458 struct sk_buff *skb)
459{
460 struct sk_buff *new_skb;
461
462 if (skb_linearize(skb))
463 return NULL;
464
465
466 new_skb = netdev_alloc_skb(dev, skb->len + 4);
467 if (!new_skb)
468 return NULL;
469
470
471 skb_align(new_skb, 4);
472
473
474 skb_copy_from_linear_data(skb, new_skb->data, skb->len);
475 skb_put(new_skb, skb->len);
476
477
478 dev_kfree_skb_any(skb);
479
480 return new_skb;
481}
482#endif
483
484static netdev_tx_t
485fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
486{
487 struct fs_enet_private *fep = netdev_priv(dev);
488 cbd_t __iomem *bdp;
489 int curidx;
490 u16 sc;
491 int nr_frags;
492 skb_frag_t *frag;
493 int len;
494#ifdef CONFIG_FS_ENET_MPC5121_FEC
495 int is_aligned = 1;
496 int i;
497
498 if (!IS_ALIGNED((unsigned long)skb->data, 4)) {
499 is_aligned = 0;
500 } else {
501 nr_frags = skb_shinfo(skb)->nr_frags;
502 frag = skb_shinfo(skb)->frags;
503 for (i = 0; i < nr_frags; i++, frag++) {
504 if (!IS_ALIGNED(frag->page_offset, 4)) {
505 is_aligned = 0;
506 break;
507 }
508 }
509 }
510
511 if (!is_aligned) {
512 skb = tx_skb_align_workaround(dev, skb);
513 if (!skb) {
514
515
516
517
518
519 return NETDEV_TX_BUSY;
520 }
521 }
522#endif
523
524 spin_lock(&fep->tx_lock);
525
526
527
528
529 bdp = fep->cur_tx;
530
531 nr_frags = skb_shinfo(skb)->nr_frags;
532 if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
533 netif_stop_queue(dev);
534 spin_unlock(&fep->tx_lock);
535
536
537
538
539
540 dev_warn(fep->dev, "tx queue full!.\n");
541 return NETDEV_TX_BUSY;
542 }
543
544 curidx = bdp - fep->tx_bd_base;
545
546 len = skb->len;
547 dev->stats.tx_bytes += len;
548 if (nr_frags)
549 len -= skb->data_len;
550 fep->tx_free -= nr_frags + 1;
551
552
553
554 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
555 skb->data, len, DMA_TO_DEVICE));
556 CBDW_DATLEN(bdp, len);
557
558 fep->mapped_as_page[curidx] = 0;
559 frag = skb_shinfo(skb)->frags;
560 while (nr_frags) {
561 CBDC_SC(bdp,
562 BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST |
563 BD_ENET_TX_TC);
564 CBDS_SC(bdp, BD_ENET_TX_READY);
565
566 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
567 bdp++, curidx++;
568 else
569 bdp = fep->tx_bd_base, curidx = 0;
570
571 len = skb_frag_size(frag);
572 CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,
573 DMA_TO_DEVICE));
574 CBDW_DATLEN(bdp, len);
575
576 fep->tx_skbuff[curidx] = NULL;
577 fep->mapped_as_page[curidx] = 1;
578
579 frag++;
580 nr_frags--;
581 }
582
583
584 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
585 BD_ENET_TX_LAST | BD_ENET_TX_TC;
586
587
588
589
590 if (skb->len <= 60)
591 sc |= BD_ENET_TX_PAD;
592 CBDC_SC(bdp, BD_ENET_TX_STATS);
593 CBDS_SC(bdp, sc);
594
595
596 fep->tx_skbuff[curidx] = skb;
597
598
599 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
600 bdp++;
601 else
602 bdp = fep->tx_bd_base;
603 fep->cur_tx = bdp;
604
605 if (fep->tx_free < MAX_SKB_FRAGS)
606 netif_stop_queue(dev);
607
608 skb_tx_timestamp(skb);
609
610 (*fep->ops->tx_kickstart)(dev);
611
612 spin_unlock(&fep->tx_lock);
613
614 return NETDEV_TX_OK;
615}
616
617static void fs_timeout_work(struct work_struct *work)
618{
619 struct fs_enet_private *fep = container_of(work, struct fs_enet_private,
620 timeout_work);
621 struct net_device *dev = fep->ndev;
622 unsigned long flags;
623 int wake = 0;
624
625 dev->stats.tx_errors++;
626
627 spin_lock_irqsave(&fep->lock, flags);
628
629 if (dev->flags & IFF_UP) {
630 phy_stop(dev->phydev);
631 (*fep->ops->stop)(dev);
632 (*fep->ops->restart)(dev);
633 }
634
635 phy_start(dev->phydev);
636 wake = fep->tx_free >= MAX_SKB_FRAGS &&
637 !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
638 spin_unlock_irqrestore(&fep->lock, flags);
639
640 if (wake)
641 netif_wake_queue(dev);
642}
643
644static void fs_timeout(struct net_device *dev)
645{
646 struct fs_enet_private *fep = netdev_priv(dev);
647
648 schedule_work(&fep->timeout_work);
649}
650
651
652
653
654static void generic_adjust_link(struct net_device *dev)
655{
656 struct fs_enet_private *fep = netdev_priv(dev);
657 struct phy_device *phydev = dev->phydev;
658 int new_state = 0;
659
660 if (phydev->link) {
661
662 if (phydev->duplex != fep->oldduplex) {
663 new_state = 1;
664 fep->oldduplex = phydev->duplex;
665 }
666
667 if (phydev->speed != fep->oldspeed) {
668 new_state = 1;
669 fep->oldspeed = phydev->speed;
670 }
671
672 if (!fep->oldlink) {
673 new_state = 1;
674 fep->oldlink = 1;
675 }
676
677 if (new_state)
678 fep->ops->restart(dev);
679 } else if (fep->oldlink) {
680 new_state = 1;
681 fep->oldlink = 0;
682 fep->oldspeed = 0;
683 fep->oldduplex = -1;
684 }
685
686 if (new_state && netif_msg_link(fep))
687 phy_print_status(phydev);
688}
689
690
691static void fs_adjust_link(struct net_device *dev)
692{
693 struct fs_enet_private *fep = netdev_priv(dev);
694 unsigned long flags;
695
696 spin_lock_irqsave(&fep->lock, flags);
697
698 if(fep->ops->adjust_link)
699 fep->ops->adjust_link(dev);
700 else
701 generic_adjust_link(dev);
702
703 spin_unlock_irqrestore(&fep->lock, flags);
704}
705
706static int fs_init_phy(struct net_device *dev)
707{
708 struct fs_enet_private *fep = netdev_priv(dev);
709 struct phy_device *phydev;
710 phy_interface_t iface;
711
712 fep->oldlink = 0;
713 fep->oldspeed = 0;
714 fep->oldduplex = -1;
715
716 iface = fep->fpi->use_rmii ?
717 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII;
718
719 phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0,
720 iface);
721 if (!phydev) {
722 dev_err(&dev->dev, "Could not attach to PHY\n");
723 return -ENODEV;
724 }
725
726 return 0;
727}
728
729static int fs_enet_open(struct net_device *dev)
730{
731 struct fs_enet_private *fep = netdev_priv(dev);
732 int r;
733 int err;
734
735
736
737 fs_init_bds(fep->ndev);
738
739 napi_enable(&fep->napi);
740
741
742 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
743 "fs_enet-mac", dev);
744 if (r != 0) {
745 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
746 napi_disable(&fep->napi);
747 return -EINVAL;
748 }
749
750 err = fs_init_phy(dev);
751 if (err) {
752 free_irq(fep->interrupt, dev);
753 napi_disable(&fep->napi);
754 return err;
755 }
756 phy_start(dev->phydev);
757
758 netif_start_queue(dev);
759
760 return 0;
761}
762
763static int fs_enet_close(struct net_device *dev)
764{
765 struct fs_enet_private *fep = netdev_priv(dev);
766 unsigned long flags;
767
768 netif_stop_queue(dev);
769 netif_carrier_off(dev);
770 napi_disable(&fep->napi);
771 cancel_work_sync(&fep->timeout_work);
772 phy_stop(dev->phydev);
773
774 spin_lock_irqsave(&fep->lock, flags);
775 spin_lock(&fep->tx_lock);
776 (*fep->ops->stop)(dev);
777 spin_unlock(&fep->tx_lock);
778 spin_unlock_irqrestore(&fep->lock, flags);
779
780
781 phy_disconnect(dev->phydev);
782 free_irq(fep->interrupt, dev);
783
784 return 0;
785}
786
787
788
789static void fs_get_drvinfo(struct net_device *dev,
790 struct ethtool_drvinfo *info)
791{
792 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
793 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
794}
795
796static int fs_get_regs_len(struct net_device *dev)
797{
798 struct fs_enet_private *fep = netdev_priv(dev);
799
800 return (*fep->ops->get_regs_len)(dev);
801}
802
803static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
804 void *p)
805{
806 struct fs_enet_private *fep = netdev_priv(dev);
807 unsigned long flags;
808 int r, len;
809
810 len = regs->len;
811
812 spin_lock_irqsave(&fep->lock, flags);
813 r = (*fep->ops->get_regs)(dev, p, &len);
814 spin_unlock_irqrestore(&fep->lock, flags);
815
816 if (r == 0)
817 regs->version = 0;
818}
819
820static u32 fs_get_msglevel(struct net_device *dev)
821{
822 struct fs_enet_private *fep = netdev_priv(dev);
823 return fep->msg_enable;
824}
825
826static void fs_set_msglevel(struct net_device *dev, u32 value)
827{
828 struct fs_enet_private *fep = netdev_priv(dev);
829 fep->msg_enable = value;
830}
831
832static int fs_get_tunable(struct net_device *dev,
833 const struct ethtool_tunable *tuna, void *data)
834{
835 struct fs_enet_private *fep = netdev_priv(dev);
836 struct fs_platform_info *fpi = fep->fpi;
837 int ret = 0;
838
839 switch (tuna->id) {
840 case ETHTOOL_RX_COPYBREAK:
841 *(u32 *)data = fpi->rx_copybreak;
842 break;
843 default:
844 ret = -EINVAL;
845 break;
846 }
847
848 return ret;
849}
850
851static int fs_set_tunable(struct net_device *dev,
852 const struct ethtool_tunable *tuna, const void *data)
853{
854 struct fs_enet_private *fep = netdev_priv(dev);
855 struct fs_platform_info *fpi = fep->fpi;
856 int ret = 0;
857
858 switch (tuna->id) {
859 case ETHTOOL_RX_COPYBREAK:
860 fpi->rx_copybreak = *(u32 *)data;
861 break;
862 default:
863 ret = -EINVAL;
864 break;
865 }
866
867 return ret;
868}
869
870static const struct ethtool_ops fs_ethtool_ops = {
871 .get_drvinfo = fs_get_drvinfo,
872 .get_regs_len = fs_get_regs_len,
873 .nway_reset = phy_ethtool_nway_reset,
874 .get_link = ethtool_op_get_link,
875 .get_msglevel = fs_get_msglevel,
876 .set_msglevel = fs_set_msglevel,
877 .get_regs = fs_get_regs,
878 .get_ts_info = ethtool_op_get_ts_info,
879 .get_link_ksettings = phy_ethtool_get_link_ksettings,
880 .set_link_ksettings = phy_ethtool_set_link_ksettings,
881 .get_tunable = fs_get_tunable,
882 .set_tunable = fs_set_tunable,
883};
884
885static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
886{
887 if (!netif_running(dev))
888 return -EINVAL;
889
890 return phy_mii_ioctl(dev->phydev, rq, cmd);
891}
892
893extern int fs_mii_connect(struct net_device *dev);
894extern void fs_mii_disconnect(struct net_device *dev);
895
896
897
898#ifdef CONFIG_FS_ENET_HAS_FEC
899#define IS_FEC(match) ((match)->data == &fs_fec_ops)
900#else
901#define IS_FEC(match) 0
902#endif
903
904static const struct net_device_ops fs_enet_netdev_ops = {
905 .ndo_open = fs_enet_open,
906 .ndo_stop = fs_enet_close,
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#ifdef CONFIG_NET_POLL_CONTROLLER
914 .ndo_poll_controller = fs_enet_netpoll,
915#endif
916};
917
918static const struct of_device_id fs_enet_match[];
919static int fs_enet_probe(struct platform_device *ofdev)
920{
921 const struct of_device_id *match;
922 struct net_device *ndev;
923 struct fs_enet_private *fep;
924 struct fs_platform_info *fpi;
925 const u32 *data;
926 struct clk *clk;
927 int err;
928 const u8 *mac_addr;
929 const char *phy_connection_type;
930 int privsize, len, ret = -ENODEV;
931
932 match = of_match_device(fs_enet_match, &ofdev->dev);
933 if (!match)
934 return -EINVAL;
935
936 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
937 if (!fpi)
938 return -ENOMEM;
939
940 if (!IS_FEC(match)) {
941 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
942 if (!data || len != 4)
943 goto out_free_fpi;
944
945 fpi->cp_command = *data;
946 }
947
948 fpi->rx_ring = RX_RING_SIZE;
949 fpi->tx_ring = TX_RING_SIZE;
950 fpi->rx_copybreak = 240;
951 fpi->napi_weight = 17;
952 fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
953 if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) {
954 err = of_phy_register_fixed_link(ofdev->dev.of_node);
955 if (err)
956 goto out_free_fpi;
957
958
959
960
961 fpi->phy_node = of_node_get(ofdev->dev.of_node);
962 }
963
964 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
965 phy_connection_type = of_get_property(ofdev->dev.of_node,
966 "phy-connection-type", NULL);
967 if (phy_connection_type && !strcmp("rmii", phy_connection_type))
968 fpi->use_rmii = 1;
969 }
970
971
972
973
974
975 clk = devm_clk_get(&ofdev->dev, "per");
976 if (!IS_ERR(clk)) {
977 ret = clk_prepare_enable(clk);
978 if (ret)
979 goto out_deregister_fixed_link;
980
981 fpi->clk_per = clk;
982 }
983
984 privsize = sizeof(*fep) +
985 sizeof(struct sk_buff **) *
986 (fpi->rx_ring + fpi->tx_ring) +
987 sizeof(char) * fpi->tx_ring;
988
989 ndev = alloc_etherdev(privsize);
990 if (!ndev) {
991 ret = -ENOMEM;
992 goto out_put;
993 }
994
995 SET_NETDEV_DEV(ndev, &ofdev->dev);
996 platform_set_drvdata(ofdev, ndev);
997
998 fep = netdev_priv(ndev);
999 fep->dev = &ofdev->dev;
1000 fep->ndev = ndev;
1001 fep->fpi = fpi;
1002 fep->ops = match->data;
1003
1004 ret = fep->ops->setup_data(ndev);
1005 if (ret)
1006 goto out_free_dev;
1007
1008 fep->rx_skbuff = (struct sk_buff **)&fep[1];
1009 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1010 fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +
1011 fpi->tx_ring);
1012
1013 spin_lock_init(&fep->lock);
1014 spin_lock_init(&fep->tx_lock);
1015
1016 mac_addr = of_get_mac_address(ofdev->dev.of_node);
1017 if (!IS_ERR(mac_addr))
1018 ether_addr_copy(ndev->dev_addr, mac_addr);
1019
1020 ret = fep->ops->allocate_bd(ndev);
1021 if (ret)
1022 goto out_cleanup_data;
1023
1024 fep->rx_bd_base = fep->ring_base;
1025 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1026
1027 fep->tx_ring = fpi->tx_ring;
1028 fep->rx_ring = fpi->rx_ring;
1029
1030 ndev->netdev_ops = &fs_enet_netdev_ops;
1031 ndev->watchdog_timeo = 2 * HZ;
1032 INIT_WORK(&fep->timeout_work, fs_timeout_work);
1033 netif_napi_add(ndev, &fep->napi, fs_enet_napi, fpi->napi_weight);
1034
1035 ndev->ethtool_ops = &fs_ethtool_ops;
1036
1037 netif_carrier_off(ndev);
1038
1039 ndev->features |= NETIF_F_SG;
1040
1041 ret = register_netdev(ndev);
1042 if (ret)
1043 goto out_free_bd;
1044
1045 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
1046
1047 return 0;
1048
1049out_free_bd:
1050 fep->ops->free_bd(ndev);
1051out_cleanup_data:
1052 fep->ops->cleanup_data(ndev);
1053out_free_dev:
1054 free_netdev(ndev);
1055out_put:
1056 if (fpi->clk_per)
1057 clk_disable_unprepare(fpi->clk_per);
1058out_deregister_fixed_link:
1059 of_node_put(fpi->phy_node);
1060 if (of_phy_is_fixed_link(ofdev->dev.of_node))
1061 of_phy_deregister_fixed_link(ofdev->dev.of_node);
1062out_free_fpi:
1063 kfree(fpi);
1064 return ret;
1065}
1066
1067static int fs_enet_remove(struct platform_device *ofdev)
1068{
1069 struct net_device *ndev = platform_get_drvdata(ofdev);
1070 struct fs_enet_private *fep = netdev_priv(ndev);
1071
1072 unregister_netdev(ndev);
1073
1074 fep->ops->free_bd(ndev);
1075 fep->ops->cleanup_data(ndev);
1076 dev_set_drvdata(fep->dev, NULL);
1077 of_node_put(fep->fpi->phy_node);
1078 if (fep->fpi->clk_per)
1079 clk_disable_unprepare(fep->fpi->clk_per);
1080 if (of_phy_is_fixed_link(ofdev->dev.of_node))
1081 of_phy_deregister_fixed_link(ofdev->dev.of_node);
1082 free_netdev(ndev);
1083 return 0;
1084}
1085
1086static const struct of_device_id fs_enet_match[] = {
1087#ifdef CONFIG_FS_ENET_HAS_SCC
1088 {
1089 .compatible = "fsl,cpm1-scc-enet",
1090 .data = (void *)&fs_scc_ops,
1091 },
1092 {
1093 .compatible = "fsl,cpm2-scc-enet",
1094 .data = (void *)&fs_scc_ops,
1095 },
1096#endif
1097#ifdef CONFIG_FS_ENET_HAS_FCC
1098 {
1099 .compatible = "fsl,cpm2-fcc-enet",
1100 .data = (void *)&fs_fcc_ops,
1101 },
1102#endif
1103#ifdef CONFIG_FS_ENET_HAS_FEC
1104#ifdef CONFIG_FS_ENET_MPC5121_FEC
1105 {
1106 .compatible = "fsl,mpc5121-fec",
1107 .data = (void *)&fs_fec_ops,
1108 },
1109 {
1110 .compatible = "fsl,mpc5125-fec",
1111 .data = (void *)&fs_fec_ops,
1112 },
1113#else
1114 {
1115 .compatible = "fsl,pq1-fec-enet",
1116 .data = (void *)&fs_fec_ops,
1117 },
1118#endif
1119#endif
1120 {}
1121};
1122MODULE_DEVICE_TABLE(of, fs_enet_match);
1123
1124static struct platform_driver fs_enet_driver = {
1125 .driver = {
1126 .name = "fs_enet",
1127 .of_match_table = fs_enet_match,
1128 },
1129 .probe = fs_enet_probe,
1130 .remove = fs_enet_remove,
1131};
1132
1133#ifdef CONFIG_NET_POLL_CONTROLLER
1134static void fs_enet_netpoll(struct net_device *dev)
1135{
1136 disable_irq(dev->irq);
1137 fs_enet_interrupt(dev->irq, dev);
1138 enable_irq(dev->irq);
1139}
1140#endif
1141
1142module_platform_driver(fs_enet_driver);
1143
