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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 int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
485{
486 struct fs_enet_private *fep = netdev_priv(dev);
487 cbd_t __iomem *bdp;
488 int curidx;
489 u16 sc;
490 int nr_frags;
491 skb_frag_t *frag;
492 int len;
493#ifdef CONFIG_FS_ENET_MPC5121_FEC
494 int is_aligned = 1;
495 int i;
496
497 if (!IS_ALIGNED((unsigned long)skb->data, 4)) {
498 is_aligned = 0;
499 } else {
500 nr_frags = skb_shinfo(skb)->nr_frags;
501 frag = skb_shinfo(skb)->frags;
502 for (i = 0; i < nr_frags; i++, frag++) {
503 if (!IS_ALIGNED(frag->page_offset, 4)) {
504 is_aligned = 0;
505 break;
506 }
507 }
508 }
509
510 if (!is_aligned) {
511 skb = tx_skb_align_workaround(dev, skb);
512 if (!skb) {
513
514
515
516
517
518 return NETDEV_TX_BUSY;
519 }
520 }
521#endif
522
523 spin_lock(&fep->tx_lock);
524
525
526
527
528 bdp = fep->cur_tx;
529
530 nr_frags = skb_shinfo(skb)->nr_frags;
531 if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
532 netif_stop_queue(dev);
533 spin_unlock(&fep->tx_lock);
534
535
536
537
538
539 dev_warn(fep->dev, "tx queue full!.\n");
540 return NETDEV_TX_BUSY;
541 }
542
543 curidx = bdp - fep->tx_bd_base;
544
545 len = skb->len;
546 dev->stats.tx_bytes += len;
547 if (nr_frags)
548 len -= skb->data_len;
549 fep->tx_free -= nr_frags + 1;
550
551
552
553 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
554 skb->data, len, DMA_TO_DEVICE));
555 CBDW_DATLEN(bdp, len);
556
557 fep->mapped_as_page[curidx] = 0;
558 frag = skb_shinfo(skb)->frags;
559 while (nr_frags) {
560 CBDC_SC(bdp,
561 BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST |
562 BD_ENET_TX_TC);
563 CBDS_SC(bdp, BD_ENET_TX_READY);
564
565 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
566 bdp++, curidx++;
567 else
568 bdp = fep->tx_bd_base, curidx = 0;
569
570 len = skb_frag_size(frag);
571 CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,
572 DMA_TO_DEVICE));
573 CBDW_DATLEN(bdp, len);
574
575 fep->tx_skbuff[curidx] = NULL;
576 fep->mapped_as_page[curidx] = 1;
577
578 frag++;
579 nr_frags--;
580 }
581
582
583 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
584 BD_ENET_TX_LAST | BD_ENET_TX_TC;
585
586
587
588
589 if (skb->len <= 60)
590 sc |= BD_ENET_TX_PAD;
591 CBDC_SC(bdp, BD_ENET_TX_STATS);
592 CBDS_SC(bdp, sc);
593
594
595 fep->tx_skbuff[curidx] = skb;
596
597
598 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
599 bdp++;
600 else
601 bdp = fep->tx_bd_base;
602 fep->cur_tx = bdp;
603
604 if (fep->tx_free < MAX_SKB_FRAGS)
605 netif_stop_queue(dev);
606
607 skb_tx_timestamp(skb);
608
609 (*fep->ops->tx_kickstart)(dev);
610
611 spin_unlock(&fep->tx_lock);
612
613 return NETDEV_TX_OK;
614}
615
616static void fs_timeout(struct net_device *dev)
617{
618 struct fs_enet_private *fep = netdev_priv(dev);
619 unsigned long flags;
620 int wake = 0;
621
622 dev->stats.tx_errors++;
623
624 spin_lock_irqsave(&fep->lock, flags);
625
626 if (dev->flags & IFF_UP) {
627 phy_stop(dev->phydev);
628 (*fep->ops->stop)(dev);
629 (*fep->ops->restart)(dev);
630 phy_start(dev->phydev);
631 }
632
633 phy_start(dev->phydev);
634 wake = fep->tx_free >= MAX_SKB_FRAGS &&
635 !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
636 spin_unlock_irqrestore(&fep->lock, flags);
637
638 if (wake)
639 netif_wake_queue(dev);
640}
641
642
643
644
645static void generic_adjust_link(struct net_device *dev)
646{
647 struct fs_enet_private *fep = netdev_priv(dev);
648 struct phy_device *phydev = dev->phydev;
649 int new_state = 0;
650
651 if (phydev->link) {
652
653 if (phydev->duplex != fep->oldduplex) {
654 new_state = 1;
655 fep->oldduplex = phydev->duplex;
656 }
657
658 if (phydev->speed != fep->oldspeed) {
659 new_state = 1;
660 fep->oldspeed = phydev->speed;
661 }
662
663 if (!fep->oldlink) {
664 new_state = 1;
665 fep->oldlink = 1;
666 }
667
668 if (new_state)
669 fep->ops->restart(dev);
670 } else if (fep->oldlink) {
671 new_state = 1;
672 fep->oldlink = 0;
673 fep->oldspeed = 0;
674 fep->oldduplex = -1;
675 }
676
677 if (new_state && netif_msg_link(fep))
678 phy_print_status(phydev);
679}
680
681
682static void fs_adjust_link(struct net_device *dev)
683{
684 struct fs_enet_private *fep = netdev_priv(dev);
685 unsigned long flags;
686
687 spin_lock_irqsave(&fep->lock, flags);
688
689 if(fep->ops->adjust_link)
690 fep->ops->adjust_link(dev);
691 else
692 generic_adjust_link(dev);
693
694 spin_unlock_irqrestore(&fep->lock, flags);
695}
696
697static int fs_init_phy(struct net_device *dev)
698{
699 struct fs_enet_private *fep = netdev_priv(dev);
700 struct phy_device *phydev;
701 phy_interface_t iface;
702
703 fep->oldlink = 0;
704 fep->oldspeed = 0;
705 fep->oldduplex = -1;
706
707 iface = fep->fpi->use_rmii ?
708 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII;
709
710 phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0,
711 iface);
712 if (!phydev) {
713 dev_err(&dev->dev, "Could not attach to PHY\n");
714 return -ENODEV;
715 }
716
717 return 0;
718}
719
720static int fs_enet_open(struct net_device *dev)
721{
722 struct fs_enet_private *fep = netdev_priv(dev);
723 int r;
724 int err;
725
726
727
728 fs_init_bds(fep->ndev);
729
730 napi_enable(&fep->napi);
731
732
733 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
734 "fs_enet-mac", dev);
735 if (r != 0) {
736 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
737 napi_disable(&fep->napi);
738 return -EINVAL;
739 }
740
741 err = fs_init_phy(dev);
742 if (err) {
743 free_irq(fep->interrupt, dev);
744 napi_disable(&fep->napi);
745 return err;
746 }
747 phy_start(dev->phydev);
748
749 netif_start_queue(dev);
750
751 return 0;
752}
753
754static int fs_enet_close(struct net_device *dev)
755{
756 struct fs_enet_private *fep = netdev_priv(dev);
757 unsigned long flags;
758
759 netif_stop_queue(dev);
760 netif_carrier_off(dev);
761 napi_disable(&fep->napi);
762 phy_stop(dev->phydev);
763
764 spin_lock_irqsave(&fep->lock, flags);
765 spin_lock(&fep->tx_lock);
766 (*fep->ops->stop)(dev);
767 spin_unlock(&fep->tx_lock);
768 spin_unlock_irqrestore(&fep->lock, flags);
769
770
771 phy_disconnect(dev->phydev);
772 free_irq(fep->interrupt, dev);
773
774 return 0;
775}
776
777
778
779static void fs_get_drvinfo(struct net_device *dev,
780 struct ethtool_drvinfo *info)
781{
782 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
783 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
784}
785
786static int fs_get_regs_len(struct net_device *dev)
787{
788 struct fs_enet_private *fep = netdev_priv(dev);
789
790 return (*fep->ops->get_regs_len)(dev);
791}
792
793static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
794 void *p)
795{
796 struct fs_enet_private *fep = netdev_priv(dev);
797 unsigned long flags;
798 int r, len;
799
800 len = regs->len;
801
802 spin_lock_irqsave(&fep->lock, flags);
803 r = (*fep->ops->get_regs)(dev, p, &len);
804 spin_unlock_irqrestore(&fep->lock, flags);
805
806 if (r == 0)
807 regs->version = 0;
808}
809
810static u32 fs_get_msglevel(struct net_device *dev)
811{
812 struct fs_enet_private *fep = netdev_priv(dev);
813 return fep->msg_enable;
814}
815
816static void fs_set_msglevel(struct net_device *dev, u32 value)
817{
818 struct fs_enet_private *fep = netdev_priv(dev);
819 fep->msg_enable = value;
820}
821
822static int fs_get_tunable(struct net_device *dev,
823 const struct ethtool_tunable *tuna, void *data)
824{
825 struct fs_enet_private *fep = netdev_priv(dev);
826 struct fs_platform_info *fpi = fep->fpi;
827 int ret = 0;
828
829 switch (tuna->id) {
830 case ETHTOOL_RX_COPYBREAK:
831 *(u32 *)data = fpi->rx_copybreak;
832 break;
833 default:
834 ret = -EINVAL;
835 break;
836 }
837
838 return ret;
839}
840
841static int fs_set_tunable(struct net_device *dev,
842 const struct ethtool_tunable *tuna, const void *data)
843{
844 struct fs_enet_private *fep = netdev_priv(dev);
845 struct fs_platform_info *fpi = fep->fpi;
846 int ret = 0;
847
848 switch (tuna->id) {
849 case ETHTOOL_RX_COPYBREAK:
850 fpi->rx_copybreak = *(u32 *)data;
851 break;
852 default:
853 ret = -EINVAL;
854 break;
855 }
856
857 return ret;
858}
859
860static const struct ethtool_ops fs_ethtool_ops = {
861 .get_drvinfo = fs_get_drvinfo,
862 .get_regs_len = fs_get_regs_len,
863 .nway_reset = phy_ethtool_nway_reset,
864 .get_link = ethtool_op_get_link,
865 .get_msglevel = fs_get_msglevel,
866 .set_msglevel = fs_set_msglevel,
867 .get_regs = fs_get_regs,
868 .get_ts_info = ethtool_op_get_ts_info,
869 .get_link_ksettings = phy_ethtool_get_link_ksettings,
870 .set_link_ksettings = phy_ethtool_set_link_ksettings,
871 .get_tunable = fs_get_tunable,
872 .set_tunable = fs_set_tunable,
873};
874
875static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
876{
877 if (!netif_running(dev))
878 return -EINVAL;
879
880 return phy_mii_ioctl(dev->phydev, rq, cmd);
881}
882
883extern int fs_mii_connect(struct net_device *dev);
884extern void fs_mii_disconnect(struct net_device *dev);
885
886
887
888#ifdef CONFIG_FS_ENET_HAS_FEC
889#define IS_FEC(match) ((match)->data == &fs_fec_ops)
890#else
891#define IS_FEC(match) 0
892#endif
893
894static const struct net_device_ops fs_enet_netdev_ops = {
895 .ndo_open = fs_enet_open,
896 .ndo_stop = fs_enet_close,
897 .ndo_start_xmit = fs_enet_start_xmit,
898 .ndo_tx_timeout = fs_timeout,
899 .ndo_set_rx_mode = fs_set_multicast_list,
900 .ndo_do_ioctl = fs_ioctl,
901 .ndo_validate_addr = eth_validate_addr,
902 .ndo_set_mac_address = eth_mac_addr,
903#ifdef CONFIG_NET_POLL_CONTROLLER
904 .ndo_poll_controller = fs_enet_netpoll,
905#endif
906};
907
908static const struct of_device_id fs_enet_match[];
909static int fs_enet_probe(struct platform_device *ofdev)
910{
911 const struct of_device_id *match;
912 struct net_device *ndev;
913 struct fs_enet_private *fep;
914 struct fs_platform_info *fpi;
915 const u32 *data;
916 struct clk *clk;
917 int err;
918 const u8 *mac_addr;
919 const char *phy_connection_type;
920 int privsize, len, ret = -ENODEV;
921
922 match = of_match_device(fs_enet_match, &ofdev->dev);
923 if (!match)
924 return -EINVAL;
925
926 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
927 if (!fpi)
928 return -ENOMEM;
929
930 if (!IS_FEC(match)) {
931 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
932 if (!data || len != 4)
933 goto out_free_fpi;
934
935 fpi->cp_command = *data;
936 }
937
938 fpi->rx_ring = RX_RING_SIZE;
939 fpi->tx_ring = TX_RING_SIZE;
940 fpi->rx_copybreak = 240;
941 fpi->napi_weight = 17;
942 fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
943 if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) {
944 err = of_phy_register_fixed_link(ofdev->dev.of_node);
945 if (err)
946 goto out_free_fpi;
947
948
949
950
951 fpi->phy_node = of_node_get(ofdev->dev.of_node);
952 }
953
954 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
955 phy_connection_type = of_get_property(ofdev->dev.of_node,
956 "phy-connection-type", NULL);
957 if (phy_connection_type && !strcmp("rmii", phy_connection_type))
958 fpi->use_rmii = 1;
959 }
960
961
962
963
964
965 clk = devm_clk_get(&ofdev->dev, "per");
966 if (!IS_ERR(clk)) {
967 ret = clk_prepare_enable(clk);
968 if (ret)
969 goto out_deregister_fixed_link;
970
971 fpi->clk_per = clk;
972 }
973
974 privsize = sizeof(*fep) +
975 sizeof(struct sk_buff **) *
976 (fpi->rx_ring + fpi->tx_ring) +
977 sizeof(char) * fpi->tx_ring;
978
979 ndev = alloc_etherdev(privsize);
980 if (!ndev) {
981 ret = -ENOMEM;
982 goto out_put;
983 }
984
985 SET_NETDEV_DEV(ndev, &ofdev->dev);
986 platform_set_drvdata(ofdev, ndev);
987
988 fep = netdev_priv(ndev);
989 fep->dev = &ofdev->dev;
990 fep->ndev = ndev;
991 fep->fpi = fpi;
992 fep->ops = match->data;
993
994 ret = fep->ops->setup_data(ndev);
995 if (ret)
996 goto out_free_dev;
997
998 fep->rx_skbuff = (struct sk_buff **)&fep[1];
999 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1000 fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +
1001 fpi->tx_ring);
1002
1003 spin_lock_init(&fep->lock);
1004 spin_lock_init(&fep->tx_lock);
1005
1006 mac_addr = of_get_mac_address(ofdev->dev.of_node);
1007 if (mac_addr)
1008 memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
1009
1010 ret = fep->ops->allocate_bd(ndev);
1011 if (ret)
1012 goto out_cleanup_data;
1013
1014 fep->rx_bd_base = fep->ring_base;
1015 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1016
1017 fep->tx_ring = fpi->tx_ring;
1018 fep->rx_ring = fpi->rx_ring;
1019
1020 ndev->netdev_ops = &fs_enet_netdev_ops;
1021 ndev->watchdog_timeo = 2 * HZ;
1022 netif_napi_add(ndev, &fep->napi, fs_enet_napi, fpi->napi_weight);
1023
1024 ndev->ethtool_ops = &fs_ethtool_ops;
1025
1026 init_timer(&fep->phy_timer_list);
1027
1028 netif_carrier_off(ndev);
1029
1030 ndev->features |= NETIF_F_SG;
1031
1032 ret = register_netdev(ndev);
1033 if (ret)
1034 goto out_free_bd;
1035
1036 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
1037
1038 return 0;
1039
1040out_free_bd:
1041 fep->ops->free_bd(ndev);
1042out_cleanup_data:
1043 fep->ops->cleanup_data(ndev);
1044out_free_dev:
1045 free_netdev(ndev);
1046out_put:
1047 if (fpi->clk_per)
1048 clk_disable_unprepare(fpi->clk_per);
1049out_deregister_fixed_link:
1050 of_node_put(fpi->phy_node);
1051 if (of_phy_is_fixed_link(ofdev->dev.of_node))
1052 of_phy_deregister_fixed_link(ofdev->dev.of_node);
1053out_free_fpi:
1054 kfree(fpi);
1055 return ret;
1056}
1057
1058static int fs_enet_remove(struct platform_device *ofdev)
1059{
1060 struct net_device *ndev = platform_get_drvdata(ofdev);
1061 struct fs_enet_private *fep = netdev_priv(ndev);
1062
1063 unregister_netdev(ndev);
1064
1065 fep->ops->free_bd(ndev);
1066 fep->ops->cleanup_data(ndev);
1067 dev_set_drvdata(fep->dev, NULL);
1068 of_node_put(fep->fpi->phy_node);
1069 if (fep->fpi->clk_per)
1070 clk_disable_unprepare(fep->fpi->clk_per);
1071 if (of_phy_is_fixed_link(ofdev->dev.of_node))
1072 of_phy_deregister_fixed_link(ofdev->dev.of_node);
1073 free_netdev(ndev);
1074 return 0;
1075}
1076
1077static const struct of_device_id fs_enet_match[] = {
1078#ifdef CONFIG_FS_ENET_HAS_SCC
1079 {
1080 .compatible = "fsl,cpm1-scc-enet",
1081 .data = (void *)&fs_scc_ops,
1082 },
1083 {
1084 .compatible = "fsl,cpm2-scc-enet",
1085 .data = (void *)&fs_scc_ops,
1086 },
1087#endif
1088#ifdef CONFIG_FS_ENET_HAS_FCC
1089 {
1090 .compatible = "fsl,cpm2-fcc-enet",
1091 .data = (void *)&fs_fcc_ops,
1092 },
1093#endif
1094#ifdef CONFIG_FS_ENET_HAS_FEC
1095#ifdef CONFIG_FS_ENET_MPC5121_FEC
1096 {
1097 .compatible = "fsl,mpc5121-fec",
1098 .data = (void *)&fs_fec_ops,
1099 },
1100 {
1101 .compatible = "fsl,mpc5125-fec",
1102 .data = (void *)&fs_fec_ops,
1103 },
1104#else
1105 {
1106 .compatible = "fsl,pq1-fec-enet",
1107 .data = (void *)&fs_fec_ops,
1108 },
1109#endif
1110#endif
1111 {}
1112};
1113MODULE_DEVICE_TABLE(of, fs_enet_match);
1114
1115static struct platform_driver fs_enet_driver = {
1116 .driver = {
1117 .name = "fs_enet",
1118 .of_match_table = fs_enet_match,
1119 },
1120 .probe = fs_enet_probe,
1121 .remove = fs_enet_remove,
1122};
1123
1124#ifdef CONFIG_NET_POLL_CONTROLLER
1125static void fs_enet_netpoll(struct net_device *dev)
1126{
1127 disable_irq(dev->irq);
1128 fs_enet_interrupt(dev->irq, dev);
1129 enable_irq(dev->irq);
1130}
1131#endif
1132
1133module_platform_driver(fs_enet_driver);
1134
