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1/*
2 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
3 *
4 * Copyright (c) 2003 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
6 *
7 * 2005 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
9 *
10 * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
11 * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
12 *
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.
16 */
17
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/init.h>
28#include <linux/delay.h>
29#include <linux/netdevice.h>
30#include <linux/etherdevice.h>
31#include <linux/skbuff.h>
32#include <linux/spinlock.h>
33#include <linux/mii.h>
34#include <linux/ethtool.h>
35#include <linux/bitops.h>
36#include <linux/fs.h>
37#include <linux/platform_device.h>
38#include <linux/phy.h>
39#include <linux/of.h>
40#include <linux/of_mdio.h>
41#include <linux/of_platform.h>
42#include <linux/of_gpio.h>
43#include <linux/of_net.h>
44
45#include <linux/vmalloc.h>
46#include <asm/pgtable.h>
47#include <asm/irq.h>
48#include <asm/uaccess.h>
49
50#include "fs_enet.h"
51
52/*************************************************/
53
54MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
55MODULE_DESCRIPTION("Freescale Ethernet Driver");
56MODULE_LICENSE("GPL");
57MODULE_VERSION(DRV_MODULE_VERSION);
58
59static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
60module_param(fs_enet_debug, int, 0);
61MODULE_PARM_DESC(fs_enet_debug,
62 "Freescale bitmapped debugging message enable value");
63
64#ifdef CONFIG_NET_POLL_CONTROLLER
65static void fs_enet_netpoll(struct net_device *dev);
66#endif
67
68static void fs_set_multicast_list(struct net_device *dev)
69{
70 struct fs_enet_private *fep = netdev_priv(dev);
71
72 (*fep->ops->set_multicast_list)(dev);
73}
74
75static void skb_align(struct sk_buff *skb, int align)
76{
77 int off = ((unsigned long)skb->data) & (align - 1);
78
79 if (off)
80 skb_reserve(skb, align - off);
81}
82
83/* NAPI receive function */
84static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
85{
86 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
87 struct net_device *dev = fep->ndev;
88 const struct fs_platform_info *fpi = fep->fpi;
89 cbd_t __iomem *bdp;
90 struct sk_buff *skb, *skbn, *skbt;
91 int received = 0;
92 u16 pkt_len, sc;
93 int curidx;
94
95 /*
96 * First, grab all of the stats for the incoming packet.
97 * These get messed up if we get called due to a busy condition.
98 */
99 bdp = fep->cur_rx;
100
101 /* clear RX status bits for napi*/
102 (*fep->ops->napi_clear_rx_event)(dev);
103
104 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
105 curidx = bdp - fep->rx_bd_base;
106
107 /*
108 * Since we have allocated space to hold a complete frame,
109 * the last indicator should be set.
110 */
111 if ((sc & BD_ENET_RX_LAST) == 0)
112 dev_warn(fep->dev, "rcv is not +last\n");
113
114 /*
115 * Check for errors.
116 */
117 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
118 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
119 fep->stats.rx_errors++;
120 /* Frame too long or too short. */
121 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
122 fep->stats.rx_length_errors++;
123 /* Frame alignment */
124 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
125 fep->stats.rx_frame_errors++;
126 /* CRC Error */
127 if (sc & BD_ENET_RX_CR)
128 fep->stats.rx_crc_errors++;
129 /* FIFO overrun */
130 if (sc & BD_ENET_RX_OV)
131 fep->stats.rx_crc_errors++;
132
133 skb = fep->rx_skbuff[curidx];
134
135 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
136 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
137 DMA_FROM_DEVICE);
138
139 skbn = skb;
140
141 } else {
142 skb = fep->rx_skbuff[curidx];
143
144 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
145 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
146 DMA_FROM_DEVICE);
147
148 /*
149 * Process the incoming frame.
150 */
151 fep->stats.rx_packets++;
152 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
153 fep->stats.rx_bytes += pkt_len + 4;
154
155 if (pkt_len <= fpi->rx_copybreak) {
156 /* +2 to make IP header L1 cache aligned */
157 skbn = netdev_alloc_skb(dev, pkt_len + 2);
158 if (skbn != NULL) {
159 skb_reserve(skbn, 2); /* align IP header */
160 skb_copy_from_linear_data(skb,
161 skbn->data, pkt_len);
162 /* swap */
163 skbt = skb;
164 skb = skbn;
165 skbn = skbt;
166 }
167 } else {
168 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
169
170 if (skbn)
171 skb_align(skbn, ENET_RX_ALIGN);
172 }
173
174 if (skbn != NULL) {
175 skb_put(skb, pkt_len); /* Make room */
176 skb->protocol = eth_type_trans(skb, dev);
177 received++;
178 netif_receive_skb(skb);
179 } else {
180 dev_warn(fep->dev,
181 "Memory squeeze, dropping packet.\n");
182 fep->stats.rx_dropped++;
183 skbn = skb;
184 }
185 }
186
187 fep->rx_skbuff[curidx] = skbn;
188 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
189 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
190 DMA_FROM_DEVICE));
191 CBDW_DATLEN(bdp, 0);
192 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
193
194 /*
195 * Update BD pointer to next entry.
196 */
197 if ((sc & BD_ENET_RX_WRAP) == 0)
198 bdp++;
199 else
200 bdp = fep->rx_bd_base;
201
202 (*fep->ops->rx_bd_done)(dev);
203
204 if (received >= budget)
205 break;
206 }
207
208 fep->cur_rx = bdp;
209
210 if (received < budget) {
211 /* done */
212 napi_complete(napi);
213 (*fep->ops->napi_enable_rx)(dev);
214 }
215 return received;
216}
217
218/* non NAPI receive function */
219static int fs_enet_rx_non_napi(struct net_device *dev)
220{
221 struct fs_enet_private *fep = netdev_priv(dev);
222 const struct fs_platform_info *fpi = fep->fpi;
223 cbd_t __iomem *bdp;
224 struct sk_buff *skb, *skbn, *skbt;
225 int received = 0;
226 u16 pkt_len, sc;
227 int curidx;
228 /*
229 * First, grab all of the stats for the incoming packet.
230 * These get messed up if we get called due to a busy condition.
231 */
232 bdp = fep->cur_rx;
233
234 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
235
236 curidx = bdp - fep->rx_bd_base;
237
238 /*
239 * Since we have allocated space to hold a complete frame,
240 * the last indicator should be set.
241 */
242 if ((sc & BD_ENET_RX_LAST) == 0)
243 dev_warn(fep->dev, "rcv is not +last\n");
244
245 /*
246 * Check for errors.
247 */
248 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
249 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
250 fep->stats.rx_errors++;
251 /* Frame too long or too short. */
252 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
253 fep->stats.rx_length_errors++;
254 /* Frame alignment */
255 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
256 fep->stats.rx_frame_errors++;
257 /* CRC Error */
258 if (sc & BD_ENET_RX_CR)
259 fep->stats.rx_crc_errors++;
260 /* FIFO overrun */
261 if (sc & BD_ENET_RX_OV)
262 fep->stats.rx_crc_errors++;
263
264 skb = fep->rx_skbuff[curidx];
265
266 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
267 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
268 DMA_FROM_DEVICE);
269
270 skbn = skb;
271
272 } else {
273
274 skb = fep->rx_skbuff[curidx];
275
276 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
277 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
278 DMA_FROM_DEVICE);
279
280 /*
281 * Process the incoming frame.
282 */
283 fep->stats.rx_packets++;
284 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
285 fep->stats.rx_bytes += pkt_len + 4;
286
287 if (pkt_len <= fpi->rx_copybreak) {
288 /* +2 to make IP header L1 cache aligned */
289 skbn = netdev_alloc_skb(dev, pkt_len + 2);
290 if (skbn != NULL) {
291 skb_reserve(skbn, 2); /* align IP header */
292 skb_copy_from_linear_data(skb,
293 skbn->data, pkt_len);
294 /* swap */
295 skbt = skb;
296 skb = skbn;
297 skbn = skbt;
298 }
299 } else {
300 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
301
302 if (skbn)
303 skb_align(skbn, ENET_RX_ALIGN);
304 }
305
306 if (skbn != NULL) {
307 skb_put(skb, pkt_len); /* Make room */
308 skb->protocol = eth_type_trans(skb, dev);
309 received++;
310 netif_rx(skb);
311 } else {
312 dev_warn(fep->dev,
313 "Memory squeeze, dropping packet.\n");
314 fep->stats.rx_dropped++;
315 skbn = skb;
316 }
317 }
318
319 fep->rx_skbuff[curidx] = skbn;
320 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
321 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
322 DMA_FROM_DEVICE));
323 CBDW_DATLEN(bdp, 0);
324 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
325
326 /*
327 * Update BD pointer to next entry.
328 */
329 if ((sc & BD_ENET_RX_WRAP) == 0)
330 bdp++;
331 else
332 bdp = fep->rx_bd_base;
333
334 (*fep->ops->rx_bd_done)(dev);
335 }
336
337 fep->cur_rx = bdp;
338
339 return 0;
340}
341
342static void fs_enet_tx(struct net_device *dev)
343{
344 struct fs_enet_private *fep = netdev_priv(dev);
345 cbd_t __iomem *bdp;
346 struct sk_buff *skb;
347 int dirtyidx, do_wake, do_restart;
348 u16 sc;
349
350 spin_lock(&fep->tx_lock);
351 bdp = fep->dirty_tx;
352
353 do_wake = do_restart = 0;
354 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
355 dirtyidx = bdp - fep->tx_bd_base;
356
357 if (fep->tx_free == fep->tx_ring)
358 break;
359
360 skb = fep->tx_skbuff[dirtyidx];
361
362 /*
363 * Check for errors.
364 */
365 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
366 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
367
368 if (sc & BD_ENET_TX_HB) /* No heartbeat */
369 fep->stats.tx_heartbeat_errors++;
370 if (sc & BD_ENET_TX_LC) /* Late collision */
371 fep->stats.tx_window_errors++;
372 if (sc & BD_ENET_TX_RL) /* Retrans limit */
373 fep->stats.tx_aborted_errors++;
374 if (sc & BD_ENET_TX_UN) /* Underrun */
375 fep->stats.tx_fifo_errors++;
376 if (sc & BD_ENET_TX_CSL) /* Carrier lost */
377 fep->stats.tx_carrier_errors++;
378
379 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
380 fep->stats.tx_errors++;
381 do_restart = 1;
382 }
383 } else
384 fep->stats.tx_packets++;
385
386 if (sc & BD_ENET_TX_READY) {
387 dev_warn(fep->dev,
388 "HEY! Enet xmit interrupt and TX_READY.\n");
389 }
390
391 /*
392 * Deferred means some collisions occurred during transmit,
393 * but we eventually sent the packet OK.
394 */
395 if (sc & BD_ENET_TX_DEF)
396 fep->stats.collisions++;
397
398 /* unmap */
399 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
400 skb->len, DMA_TO_DEVICE);
401
402 /*
403 * Free the sk buffer associated with this last transmit.
404 */
405 dev_kfree_skb_irq(skb);
406 fep->tx_skbuff[dirtyidx] = NULL;
407
408 /*
409 * Update pointer to next buffer descriptor to be transmitted.
410 */
411 if ((sc & BD_ENET_TX_WRAP) == 0)
412 bdp++;
413 else
414 bdp = fep->tx_bd_base;
415
416 /*
417 * Since we have freed up a buffer, the ring is no longer
418 * full.
419 */
420 if (!fep->tx_free++)
421 do_wake = 1;
422 }
423
424 fep->dirty_tx = bdp;
425
426 if (do_restart)
427 (*fep->ops->tx_restart)(dev);
428
429 spin_unlock(&fep->tx_lock);
430
431 if (do_wake)
432 netif_wake_queue(dev);
433}
434
435/*
436 * The interrupt handler.
437 * This is called from the MPC core interrupt.
438 */
439static irqreturn_t
440fs_enet_interrupt(int irq, void *dev_id)
441{
442 struct net_device *dev = dev_id;
443 struct fs_enet_private *fep;
444 const struct fs_platform_info *fpi;
445 u32 int_events;
446 u32 int_clr_events;
447 int nr, napi_ok;
448 int handled;
449
450 fep = netdev_priv(dev);
451 fpi = fep->fpi;
452
453 nr = 0;
454 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
455 nr++;
456
457 int_clr_events = int_events;
458 if (fpi->use_napi)
459 int_clr_events &= ~fep->ev_napi_rx;
460
461 (*fep->ops->clear_int_events)(dev, int_clr_events);
462
463 if (int_events & fep->ev_err)
464 (*fep->ops->ev_error)(dev, int_events);
465
466 if (int_events & fep->ev_rx) {
467 if (!fpi->use_napi)
468 fs_enet_rx_non_napi(dev);
469 else {
470 napi_ok = napi_schedule_prep(&fep->napi);
471
472 (*fep->ops->napi_disable_rx)(dev);
473 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
474
475 /* NOTE: it is possible for FCCs in NAPI mode */
476 /* to submit a spurious interrupt while in poll */
477 if (napi_ok)
478 __napi_schedule(&fep->napi);
479 }
480 }
481
482 if (int_events & fep->ev_tx)
483 fs_enet_tx(dev);
484 }
485
486 handled = nr > 0;
487 return IRQ_RETVAL(handled);
488}
489
490void fs_init_bds(struct net_device *dev)
491{
492 struct fs_enet_private *fep = netdev_priv(dev);
493 cbd_t __iomem *bdp;
494 struct sk_buff *skb;
495 int i;
496
497 fs_cleanup_bds(dev);
498
499 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
500 fep->tx_free = fep->tx_ring;
501 fep->cur_rx = fep->rx_bd_base;
502
503 /*
504 * Initialize the receive buffer descriptors.
505 */
506 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
507 skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
508 if (skb == NULL) {
509 dev_warn(fep->dev,
510 "Memory squeeze, unable to allocate skb\n");
511 break;
512 }
513 skb_align(skb, ENET_RX_ALIGN);
514 fep->rx_skbuff[i] = skb;
515 CBDW_BUFADDR(bdp,
516 dma_map_single(fep->dev, skb->data,
517 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
518 DMA_FROM_DEVICE));
519 CBDW_DATLEN(bdp, 0); /* zero */
520 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
521 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
522 }
523 /*
524 * if we failed, fillup remainder
525 */
526 for (; i < fep->rx_ring; i++, bdp++) {
527 fep->rx_skbuff[i] = NULL;
528 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
529 }
530
531 /*
532 * ...and the same for transmit.
533 */
534 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
535 fep->tx_skbuff[i] = NULL;
536 CBDW_BUFADDR(bdp, 0);
537 CBDW_DATLEN(bdp, 0);
538 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
539 }
540}
541
542void fs_cleanup_bds(struct net_device *dev)
543{
544 struct fs_enet_private *fep = netdev_priv(dev);
545 struct sk_buff *skb;
546 cbd_t __iomem *bdp;
547 int i;
548
549 /*
550 * Reset SKB transmit buffers.
551 */
552 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
553 if ((skb = fep->tx_skbuff[i]) == NULL)
554 continue;
555
556 /* unmap */
557 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
558 skb->len, DMA_TO_DEVICE);
559
560 fep->tx_skbuff[i] = NULL;
561 dev_kfree_skb(skb);
562 }
563
564 /*
565 * Reset SKB receive buffers
566 */
567 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
568 if ((skb = fep->rx_skbuff[i]) == NULL)
569 continue;
570
571 /* unmap */
572 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
573 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
574 DMA_FROM_DEVICE);
575
576 fep->rx_skbuff[i] = NULL;
577
578 dev_kfree_skb(skb);
579 }
580}
581
582/**********************************************************************************/
583
584#ifdef CONFIG_FS_ENET_MPC5121_FEC
585/*
586 * MPC5121 FEC requeries 4-byte alignment for TX data buffer!
587 */
588static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
589 struct sk_buff *skb)
590{
591 struct sk_buff *new_skb;
592 struct fs_enet_private *fep = netdev_priv(dev);
593
594 /* Alloc new skb */
595 new_skb = netdev_alloc_skb(dev, skb->len + 4);
596 if (!new_skb) {
597 if (net_ratelimit()) {
598 dev_warn(fep->dev,
599 "Memory squeeze, dropping tx packet.\n");
600 }
601 return NULL;
602 }
603
604 /* Make sure new skb is properly aligned */
605 skb_align(new_skb, 4);
606
607 /* Copy data to new skb ... */
608 skb_copy_from_linear_data(skb, new_skb->data, skb->len);
609 skb_put(new_skb, skb->len);
610
611 /* ... and free an old one */
612 dev_kfree_skb_any(skb);
613
614 return new_skb;
615}
616#endif
617
618static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
619{
620 struct fs_enet_private *fep = netdev_priv(dev);
621 cbd_t __iomem *bdp;
622 int curidx;
623 u16 sc;
624 unsigned long flags;
625
626#ifdef CONFIG_FS_ENET_MPC5121_FEC
627 if (((unsigned long)skb->data) & 0x3) {
628 skb = tx_skb_align_workaround(dev, skb);
629 if (!skb) {
630 /*
631 * We have lost packet due to memory allocation error
632 * in tx_skb_align_workaround(). Hopefully original
633 * skb is still valid, so try transmit it later.
634 */
635 return NETDEV_TX_BUSY;
636 }
637 }
638#endif
639 spin_lock_irqsave(&fep->tx_lock, flags);
640
641 /*
642 * Fill in a Tx ring entry
643 */
644 bdp = fep->cur_tx;
645
646 if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
647 netif_stop_queue(dev);
648 spin_unlock_irqrestore(&fep->tx_lock, flags);
649
650 /*
651 * Ooops. All transmit buffers are full. Bail out.
652 * This should not happen, since the tx queue should be stopped.
653 */
654 dev_warn(fep->dev, "tx queue full!.\n");
655 return NETDEV_TX_BUSY;
656 }
657
658 curidx = bdp - fep->tx_bd_base;
659 /*
660 * Clear all of the status flags.
661 */
662 CBDC_SC(bdp, BD_ENET_TX_STATS);
663
664 /*
665 * Save skb pointer.
666 */
667 fep->tx_skbuff[curidx] = skb;
668
669 fep->stats.tx_bytes += skb->len;
670
671 /*
672 * Push the data cache so the CPM does not get stale memory data.
673 */
674 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
675 skb->data, skb->len, DMA_TO_DEVICE));
676 CBDW_DATLEN(bdp, skb->len);
677
678 /*
679 * If this was the last BD in the ring, start at the beginning again.
680 */
681 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
682 fep->cur_tx++;
683 else
684 fep->cur_tx = fep->tx_bd_base;
685
686 if (!--fep->tx_free)
687 netif_stop_queue(dev);
688
689 /* Trigger transmission start */
690 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
691 BD_ENET_TX_LAST | BD_ENET_TX_TC;
692
693 /* note that while FEC does not have this bit
694 * it marks it as available for software use
695 * yay for hw reuse :) */
696 if (skb->len <= 60)
697 sc |= BD_ENET_TX_PAD;
698 CBDS_SC(bdp, sc);
699
700 skb_tx_timestamp(skb);
701
702 (*fep->ops->tx_kickstart)(dev);
703
704 spin_unlock_irqrestore(&fep->tx_lock, flags);
705
706 return NETDEV_TX_OK;
707}
708
709static void fs_timeout(struct net_device *dev)
710{
711 struct fs_enet_private *fep = netdev_priv(dev);
712 unsigned long flags;
713 int wake = 0;
714
715 fep->stats.tx_errors++;
716
717 spin_lock_irqsave(&fep->lock, flags);
718
719 if (dev->flags & IFF_UP) {
720 phy_stop(fep->phydev);
721 (*fep->ops->stop)(dev);
722 (*fep->ops->restart)(dev);
723 phy_start(fep->phydev);
724 }
725
726 phy_start(fep->phydev);
727 wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
728 spin_unlock_irqrestore(&fep->lock, flags);
729
730 if (wake)
731 netif_wake_queue(dev);
732}
733
734/*-----------------------------------------------------------------------------
735 * generic link-change handler - should be sufficient for most cases
736 *-----------------------------------------------------------------------------*/
737static void generic_adjust_link(struct net_device *dev)
738{
739 struct fs_enet_private *fep = netdev_priv(dev);
740 struct phy_device *phydev = fep->phydev;
741 int new_state = 0;
742
743 if (phydev->link) {
744 /* adjust to duplex mode */
745 if (phydev->duplex != fep->oldduplex) {
746 new_state = 1;
747 fep->oldduplex = phydev->duplex;
748 }
749
750 if (phydev->speed != fep->oldspeed) {
751 new_state = 1;
752 fep->oldspeed = phydev->speed;
753 }
754
755 if (!fep->oldlink) {
756 new_state = 1;
757 fep->oldlink = 1;
758 }
759
760 if (new_state)
761 fep->ops->restart(dev);
762 } else if (fep->oldlink) {
763 new_state = 1;
764 fep->oldlink = 0;
765 fep->oldspeed = 0;
766 fep->oldduplex = -1;
767 }
768
769 if (new_state && netif_msg_link(fep))
770 phy_print_status(phydev);
771}
772
773
774static void fs_adjust_link(struct net_device *dev)
775{
776 struct fs_enet_private *fep = netdev_priv(dev);
777 unsigned long flags;
778
779 spin_lock_irqsave(&fep->lock, flags);
780
781 if(fep->ops->adjust_link)
782 fep->ops->adjust_link(dev);
783 else
784 generic_adjust_link(dev);
785
786 spin_unlock_irqrestore(&fep->lock, flags);
787}
788
789static int fs_init_phy(struct net_device *dev)
790{
791 struct fs_enet_private *fep = netdev_priv(dev);
792 struct phy_device *phydev;
793 phy_interface_t iface;
794
795 fep->oldlink = 0;
796 fep->oldspeed = 0;
797 fep->oldduplex = -1;
798
799 iface = fep->fpi->use_rmii ?
800 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII;
801
802 phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0,
803 iface);
804 if (!phydev) {
805 phydev = of_phy_connect_fixed_link(dev, &fs_adjust_link,
806 iface);
807 }
808 if (!phydev) {
809 dev_err(&dev->dev, "Could not attach to PHY\n");
810 return -ENODEV;
811 }
812
813 fep->phydev = phydev;
814
815 return 0;
816}
817
818static int fs_enet_open(struct net_device *dev)
819{
820 struct fs_enet_private *fep = netdev_priv(dev);
821 int r;
822 int err;
823
824 /* to initialize the fep->cur_rx,... */
825 /* not doing this, will cause a crash in fs_enet_rx_napi */
826 fs_init_bds(fep->ndev);
827
828 if (fep->fpi->use_napi)
829 napi_enable(&fep->napi);
830
831 /* Install our interrupt handler. */
832 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
833 "fs_enet-mac", dev);
834 if (r != 0) {
835 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
836 if (fep->fpi->use_napi)
837 napi_disable(&fep->napi);
838 return -EINVAL;
839 }
840
841 err = fs_init_phy(dev);
842 if (err) {
843 free_irq(fep->interrupt, dev);
844 if (fep->fpi->use_napi)
845 napi_disable(&fep->napi);
846 return err;
847 }
848 phy_start(fep->phydev);
849
850 netif_start_queue(dev);
851
852 return 0;
853}
854
855static int fs_enet_close(struct net_device *dev)
856{
857 struct fs_enet_private *fep = netdev_priv(dev);
858 unsigned long flags;
859
860 netif_stop_queue(dev);
861 netif_carrier_off(dev);
862 if (fep->fpi->use_napi)
863 napi_disable(&fep->napi);
864 phy_stop(fep->phydev);
865
866 spin_lock_irqsave(&fep->lock, flags);
867 spin_lock(&fep->tx_lock);
868 (*fep->ops->stop)(dev);
869 spin_unlock(&fep->tx_lock);
870 spin_unlock_irqrestore(&fep->lock, flags);
871
872 /* release any irqs */
873 phy_disconnect(fep->phydev);
874 fep->phydev = NULL;
875 free_irq(fep->interrupt, dev);
876
877 return 0;
878}
879
880static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
881{
882 struct fs_enet_private *fep = netdev_priv(dev);
883 return &fep->stats;
884}
885
886/*************************************************************************/
887
888static void fs_get_drvinfo(struct net_device *dev,
889 struct ethtool_drvinfo *info)
890{
891 strcpy(info->driver, DRV_MODULE_NAME);
892 strcpy(info->version, DRV_MODULE_VERSION);
893}
894
895static int fs_get_regs_len(struct net_device *dev)
896{
897 struct fs_enet_private *fep = netdev_priv(dev);
898
899 return (*fep->ops->get_regs_len)(dev);
900}
901
902static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
903 void *p)
904{
905 struct fs_enet_private *fep = netdev_priv(dev);
906 unsigned long flags;
907 int r, len;
908
909 len = regs->len;
910
911 spin_lock_irqsave(&fep->lock, flags);
912 r = (*fep->ops->get_regs)(dev, p, &len);
913 spin_unlock_irqrestore(&fep->lock, flags);
914
915 if (r == 0)
916 regs->version = 0;
917}
918
919static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
920{
921 struct fs_enet_private *fep = netdev_priv(dev);
922
923 if (!fep->phydev)
924 return -ENODEV;
925
926 return phy_ethtool_gset(fep->phydev, cmd);
927}
928
929static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
930{
931 struct fs_enet_private *fep = netdev_priv(dev);
932
933 if (!fep->phydev)
934 return -ENODEV;
935
936 return phy_ethtool_sset(fep->phydev, cmd);
937}
938
939static int fs_nway_reset(struct net_device *dev)
940{
941 return 0;
942}
943
944static u32 fs_get_msglevel(struct net_device *dev)
945{
946 struct fs_enet_private *fep = netdev_priv(dev);
947 return fep->msg_enable;
948}
949
950static void fs_set_msglevel(struct net_device *dev, u32 value)
951{
952 struct fs_enet_private *fep = netdev_priv(dev);
953 fep->msg_enable = value;
954}
955
956static const struct ethtool_ops fs_ethtool_ops = {
957 .get_drvinfo = fs_get_drvinfo,
958 .get_regs_len = fs_get_regs_len,
959 .get_settings = fs_get_settings,
960 .set_settings = fs_set_settings,
961 .nway_reset = fs_nway_reset,
962 .get_link = ethtool_op_get_link,
963 .get_msglevel = fs_get_msglevel,
964 .set_msglevel = fs_set_msglevel,
965 .get_regs = fs_get_regs,
966 .get_ts_info = ethtool_op_get_ts_info,
967};
968
969static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
970{
971 struct fs_enet_private *fep = netdev_priv(dev);
972
973 if (!netif_running(dev))
974 return -EINVAL;
975
976 return phy_mii_ioctl(fep->phydev, rq, cmd);
977}
978
979extern int fs_mii_connect(struct net_device *dev);
980extern void fs_mii_disconnect(struct net_device *dev);
981
982/**************************************************************************************/
983
984#ifdef CONFIG_FS_ENET_HAS_FEC
985#define IS_FEC(match) ((match)->data == &fs_fec_ops)
986#else
987#define IS_FEC(match) 0
988#endif
989
990static const struct net_device_ops fs_enet_netdev_ops = {
991 .ndo_open = fs_enet_open,
992 .ndo_stop = fs_enet_close,
993 .ndo_get_stats = fs_enet_get_stats,
994 .ndo_start_xmit = fs_enet_start_xmit,
995 .ndo_tx_timeout = fs_timeout,
996 .ndo_set_rx_mode = fs_set_multicast_list,
997 .ndo_do_ioctl = fs_ioctl,
998 .ndo_validate_addr = eth_validate_addr,
999 .ndo_set_mac_address = eth_mac_addr,
1000 .ndo_change_mtu = eth_change_mtu,
1001#ifdef CONFIG_NET_POLL_CONTROLLER
1002 .ndo_poll_controller = fs_enet_netpoll,
1003#endif
1004};
1005
1006static struct of_device_id fs_enet_match[];
1007static int __devinit fs_enet_probe(struct platform_device *ofdev)
1008{
1009 const struct of_device_id *match;
1010 struct net_device *ndev;
1011 struct fs_enet_private *fep;
1012 struct fs_platform_info *fpi;
1013 const u32 *data;
1014 const u8 *mac_addr;
1015 const char *phy_connection_type;
1016 int privsize, len, ret = -ENODEV;
1017
1018 match = of_match_device(fs_enet_match, &ofdev->dev);
1019 if (!match)
1020 return -EINVAL;
1021
1022 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
1023 if (!fpi)
1024 return -ENOMEM;
1025
1026 if (!IS_FEC(match)) {
1027 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
1028 if (!data || len != 4)
1029 goto out_free_fpi;
1030
1031 fpi->cp_command = *data;
1032 }
1033
1034 fpi->rx_ring = 32;
1035 fpi->tx_ring = 32;
1036 fpi->rx_copybreak = 240;
1037 fpi->use_napi = 1;
1038 fpi->napi_weight = 17;
1039 fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
1040 if ((!fpi->phy_node) && (!of_get_property(ofdev->dev.of_node, "fixed-link",
1041 NULL)))
1042 goto out_free_fpi;
1043
1044 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
1045 phy_connection_type = of_get_property(ofdev->dev.of_node,
1046 "phy-connection-type", NULL);
1047 if (phy_connection_type && !strcmp("rmii", phy_connection_type))
1048 fpi->use_rmii = 1;
1049 }
1050
1051 privsize = sizeof(*fep) +
1052 sizeof(struct sk_buff **) *
1053 (fpi->rx_ring + fpi->tx_ring);
1054
1055 ndev = alloc_etherdev(privsize);
1056 if (!ndev) {
1057 ret = -ENOMEM;
1058 goto out_put;
1059 }
1060
1061 SET_NETDEV_DEV(ndev, &ofdev->dev);
1062 dev_set_drvdata(&ofdev->dev, ndev);
1063
1064 fep = netdev_priv(ndev);
1065 fep->dev = &ofdev->dev;
1066 fep->ndev = ndev;
1067 fep->fpi = fpi;
1068 fep->ops = match->data;
1069
1070 ret = fep->ops->setup_data(ndev);
1071 if (ret)
1072 goto out_free_dev;
1073
1074 fep->rx_skbuff = (struct sk_buff **)&fep[1];
1075 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1076
1077 spin_lock_init(&fep->lock);
1078 spin_lock_init(&fep->tx_lock);
1079
1080 mac_addr = of_get_mac_address(ofdev->dev.of_node);
1081 if (mac_addr)
1082 memcpy(ndev->dev_addr, mac_addr, 6);
1083
1084 ret = fep->ops->allocate_bd(ndev);
1085 if (ret)
1086 goto out_cleanup_data;
1087
1088 fep->rx_bd_base = fep->ring_base;
1089 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1090
1091 fep->tx_ring = fpi->tx_ring;
1092 fep->rx_ring = fpi->rx_ring;
1093
1094 ndev->netdev_ops = &fs_enet_netdev_ops;
1095 ndev->watchdog_timeo = 2 * HZ;
1096 if (fpi->use_napi)
1097 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi,
1098 fpi->napi_weight);
1099
1100 ndev->ethtool_ops = &fs_ethtool_ops;
1101
1102 init_timer(&fep->phy_timer_list);
1103
1104 netif_carrier_off(ndev);
1105
1106 ret = register_netdev(ndev);
1107 if (ret)
1108 goto out_free_bd;
1109
1110 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
1111
1112 return 0;
1113
1114out_free_bd:
1115 fep->ops->free_bd(ndev);
1116out_cleanup_data:
1117 fep->ops->cleanup_data(ndev);
1118out_free_dev:
1119 free_netdev(ndev);
1120 dev_set_drvdata(&ofdev->dev, NULL);
1121out_put:
1122 of_node_put(fpi->phy_node);
1123out_free_fpi:
1124 kfree(fpi);
1125 return ret;
1126}
1127
1128static int fs_enet_remove(struct platform_device *ofdev)
1129{
1130 struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
1131 struct fs_enet_private *fep = netdev_priv(ndev);
1132
1133 unregister_netdev(ndev);
1134
1135 fep->ops->free_bd(ndev);
1136 fep->ops->cleanup_data(ndev);
1137 dev_set_drvdata(fep->dev, NULL);
1138 of_node_put(fep->fpi->phy_node);
1139 free_netdev(ndev);
1140 return 0;
1141}
1142
1143static struct of_device_id fs_enet_match[] = {
1144#ifdef CONFIG_FS_ENET_HAS_SCC
1145 {
1146 .compatible = "fsl,cpm1-scc-enet",
1147 .data = (void *)&fs_scc_ops,
1148 },
1149 {
1150 .compatible = "fsl,cpm2-scc-enet",
1151 .data = (void *)&fs_scc_ops,
1152 },
1153#endif
1154#ifdef CONFIG_FS_ENET_HAS_FCC
1155 {
1156 .compatible = "fsl,cpm2-fcc-enet",
1157 .data = (void *)&fs_fcc_ops,
1158 },
1159#endif
1160#ifdef CONFIG_FS_ENET_HAS_FEC
1161#ifdef CONFIG_FS_ENET_MPC5121_FEC
1162 {
1163 .compatible = "fsl,mpc5121-fec",
1164 .data = (void *)&fs_fec_ops,
1165 },
1166 {
1167 .compatible = "fsl,mpc5125-fec",
1168 .data = (void *)&fs_fec_ops,
1169 },
1170#else
1171 {
1172 .compatible = "fsl,pq1-fec-enet",
1173 .data = (void *)&fs_fec_ops,
1174 },
1175#endif
1176#endif
1177 {}
1178};
1179MODULE_DEVICE_TABLE(of, fs_enet_match);
1180
1181static struct platform_driver fs_enet_driver = {
1182 .driver = {
1183 .owner = THIS_MODULE,
1184 .name = "fs_enet",
1185 .of_match_table = fs_enet_match,
1186 },
1187 .probe = fs_enet_probe,
1188 .remove = fs_enet_remove,
1189};
1190
1191#ifdef CONFIG_NET_POLL_CONTROLLER
1192static void fs_enet_netpoll(struct net_device *dev)
1193{
1194 disable_irq(dev->irq);
1195 fs_enet_interrupt(dev->irq, dev);
1196 enable_irq(dev->irq);
1197}
1198#endif
1199
1200module_platform_driver(fs_enet_driver);