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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/config.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/types.h>
22 #include <linux/sched.h>
23 #include <linux/string.h>
24 #include <linux/ptrace.h>
25 #include <linux/errno.h>
26 #include <linux/ioport.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/delay.h>
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/skbuff.h>
35 #include <linux/spinlock.h>
36 #include <linux/mii.h>
37 #include <linux/ethtool.h>
38 #include <linux/bitops.h>
39 #include <linux/fs.h>
40 #include <linux/platform_device.h>
41
42 #include <linux/vmalloc.h>
43 #include <asm/pgtable.h>
44
45 #include <asm/pgtable.h>
46 #include <asm/irq.h>
47 #include <asm/uaccess.h>
48
49 #include "fs_enet.h"
50
51 /*************************************************/
52
53 static char version[] __devinitdata =
54 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")" "\n";
55
56 MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
57 MODULE_DESCRIPTION("Freescale Ethernet Driver");
58 MODULE_LICENSE("GPL");
59 MODULE_VERSION(DRV_MODULE_VERSION);
60
61 MODULE_PARM(fs_enet_debug, "i");
62 MODULE_PARM_DESC(fs_enet_debug,
63 "Freescale bitmapped debugging message enable value");
64
65 int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
66
67 static void fs_set_multicast_list(struct net_device *dev)
68 {
69 struct fs_enet_private *fep = netdev_priv(dev);
70
71 (*fep->ops->set_multicast_list)(dev);
72 }
73
74 /* NAPI receive function */
75 static int fs_enet_rx_napi(struct net_device *dev, int *budget)
76 {
77 struct fs_enet_private *fep = netdev_priv(dev);
78 const struct fs_platform_info *fpi = fep->fpi;
79 cbd_t *bdp;
80 struct sk_buff *skb, *skbn, *skbt;
81 int received = 0;
82 u16 pkt_len, sc;
83 int curidx;
84 int rx_work_limit = 0; /* pacify gcc */
85
86 rx_work_limit = min(dev->quota, *budget);
87
88 if (!netif_running(dev))
89 return 0;
90
91 /*
92 * First, grab all of the stats for the incoming packet.
93 * These get messed up if we get called due to a busy condition.
94 */
95 bdp = fep->cur_rx;
96
97 /* clear RX status bits for napi*/
98 (*fep->ops->napi_clear_rx_event)(dev);
99
100 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
101
102 curidx = bdp - fep->rx_bd_base;
103
104 /*
105 * Since we have allocated space to hold a complete frame,
106 * the last indicator should be set.
107 */
108 if ((sc & BD_ENET_RX_LAST) == 0)
109 printk(KERN_WARNING DRV_MODULE_NAME
110 ": %s rcv is not +last\n",
111 dev->name);
112
113 /*
114 * Check for errors.
115 */
116 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
117 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
118 fep->stats.rx_errors++;
119 /* Frame too long or too short. */
120 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
121 fep->stats.rx_length_errors++;
122 /* Frame alignment */
123 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
124 fep->stats.rx_frame_errors++;
125 /* CRC Error */
126 if (sc & BD_ENET_RX_CR)
127 fep->stats.rx_crc_errors++;
128 /* FIFO overrun */
129 if (sc & BD_ENET_RX_OV)
130 fep->stats.rx_crc_errors++;
131
132 skb = fep->rx_skbuff[curidx];
133
134 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
135 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
136 DMA_FROM_DEVICE);
137
138 skbn = skb;
139
140 } else {
141
142 /* napi, got packet but no quota */
143 if (--rx_work_limit < 0)
144 break;
145
146 skb = fep->rx_skbuff[curidx];
147
148 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
149 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
150 DMA_FROM_DEVICE);
151
152 /*
153 * Process the incoming frame.
154 */
155 fep->stats.rx_packets++;
156 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
157 fep->stats.rx_bytes += pkt_len + 4;
158
159 if (pkt_len <= fpi->rx_copybreak) {
160 /* +2 to make IP header L1 cache aligned */
161 skbn = dev_alloc_skb(pkt_len + 2);
162 if (skbn != NULL) {
163 skb_reserve(skbn, 2); /* align IP header */
164 memcpy(skbn->data, skb->data, pkt_len);
165 /* swap */
166 skbt = skb;
167 skb = skbn;
168 skbn = skbt;
169 }
170 } else
171 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
172
173 if (skbn != NULL) {
174 skb->dev = dev;
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 printk(KERN_WARNING DRV_MODULE_NAME
181 ": %s Memory squeeze, dropping packet.\n",
182 dev->name);
183 fep->stats.rx_dropped++;
184 skbn = skb;
185 }
186 }
187
188 fep->rx_skbuff[curidx] = skbn;
189 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
190 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
191 DMA_FROM_DEVICE));
192 CBDW_DATLEN(bdp, 0);
193 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
194
195 /*
196 * Update BD pointer to next entry.
197 */
198 if ((sc & BD_ENET_RX_WRAP) == 0)
199 bdp++;
200 else
201 bdp = fep->rx_bd_base;
202
203 (*fep->ops->rx_bd_done)(dev);
204 }
205
206 fep->cur_rx = bdp;
207
208 dev->quota -= received;
209 *budget -= received;
210
211 if (rx_work_limit < 0)
212 return 1; /* not done */
213
214 /* done */
215 netif_rx_complete(dev);
216
217 (*fep->ops->napi_enable_rx)(dev);
218
219 return 0;
220 }
221
222 /* non NAPI receive function */
223 static int fs_enet_rx_non_napi(struct net_device *dev)
224 {
225 struct fs_enet_private *fep = netdev_priv(dev);
226 const struct fs_platform_info *fpi = fep->fpi;
227 cbd_t *bdp;
228 struct sk_buff *skb, *skbn, *skbt;
229 int received = 0;
230 u16 pkt_len, sc;
231 int curidx;
232 /*
233 * First, grab all of the stats for the incoming packet.
234 * These get messed up if we get called due to a busy condition.
235 */
236 bdp = fep->cur_rx;
237
238 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
239
240 curidx = bdp - fep->rx_bd_base;
241
242 /*
243 * Since we have allocated space to hold a complete frame,
244 * the last indicator should be set.
245 */
246 if ((sc & BD_ENET_RX_LAST) == 0)
247 printk(KERN_WARNING DRV_MODULE_NAME
248 ": %s rcv is not +last\n",
249 dev->name);
250
251 /*
252 * Check for errors.
253 */
254 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
255 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
256 fep->stats.rx_errors++;
257 /* Frame too long or too short. */
258 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
259 fep->stats.rx_length_errors++;
260 /* Frame alignment */
261 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
262 fep->stats.rx_frame_errors++;
263 /* CRC Error */
264 if (sc & BD_ENET_RX_CR)
265 fep->stats.rx_crc_errors++;
266 /* FIFO overrun */
267 if (sc & BD_ENET_RX_OV)
268 fep->stats.rx_crc_errors++;
269
270 skb = fep->rx_skbuff[curidx];
271
272 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
273 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
274 DMA_FROM_DEVICE);
275
276 skbn = skb;
277
278 } else {
279
280 skb = fep->rx_skbuff[curidx];
281
282 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
283 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
284 DMA_FROM_DEVICE);
285
286 /*
287 * Process the incoming frame.
288 */
289 fep->stats.rx_packets++;
290 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
291 fep->stats.rx_bytes += pkt_len + 4;
292
293 if (pkt_len <= fpi->rx_copybreak) {
294 /* +2 to make IP header L1 cache aligned */
295 skbn = dev_alloc_skb(pkt_len + 2);
296 if (skbn != NULL) {
297 skb_reserve(skbn, 2); /* align IP header */
298 memcpy(skbn->data, skb->data, pkt_len);
299 /* swap */
300 skbt = skb;
301 skb = skbn;
302 skbn = skbt;
303 }
304 } else
305 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
306
307 if (skbn != NULL) {
308 skb->dev = dev;
309 skb_put(skb, pkt_len); /* Make room */
310 skb->protocol = eth_type_trans(skb, dev);
311 received++;
312 netif_rx(skb);
313 } else {
314 printk(KERN_WARNING DRV_MODULE_NAME
315 ": %s Memory squeeze, dropping packet.\n",
316 dev->name);
317 fep->stats.rx_dropped++;
318 skbn = skb;
319 }
320 }
321
322 fep->rx_skbuff[curidx] = skbn;
323 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
324 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
325 DMA_FROM_DEVICE));
326 CBDW_DATLEN(bdp, 0);
327 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
328
329 /*
330 * Update BD pointer to next entry.
331 */
332 if ((sc & BD_ENET_RX_WRAP) == 0)
333 bdp++;
334 else
335 bdp = fep->rx_bd_base;
336
337 (*fep->ops->rx_bd_done)(dev);
338 }
339
340 fep->cur_rx = bdp;
341
342 return 0;
343 }
344
345 static void fs_enet_tx(struct net_device *dev)
346 {
347 struct fs_enet_private *fep = netdev_priv(dev);
348 cbd_t *bdp;
349 struct sk_buff *skb;
350 int dirtyidx, do_wake, do_restart;
351 u16 sc;
352
353 spin_lock(&fep->lock);
354 bdp = fep->dirty_tx;
355
356 do_wake = do_restart = 0;
357 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
358
359 dirtyidx = bdp - fep->tx_bd_base;
360
361 if (fep->tx_free == fep->tx_ring)
362 break;
363
364 skb = fep->tx_skbuff[dirtyidx];
365
366 /*
367 * Check for errors.
368 */
369 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
370 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
371
372 if (sc & BD_ENET_TX_HB) /* No heartbeat */
373 fep->stats.tx_heartbeat_errors++;
374 if (sc & BD_ENET_TX_LC) /* Late collision */
375 fep->stats.tx_window_errors++;
376 if (sc & BD_ENET_TX_RL) /* Retrans limit */
377 fep->stats.tx_aborted_errors++;
378 if (sc & BD_ENET_TX_UN) /* Underrun */
379 fep->stats.tx_fifo_errors++;
380 if (sc & BD_ENET_TX_CSL) /* Carrier lost */
381 fep->stats.tx_carrier_errors++;
382
383 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
384 fep->stats.tx_errors++;
385 do_restart = 1;
386 }
387 } else
388 fep->stats.tx_packets++;
389
390 if (sc & BD_ENET_TX_READY)
391 printk(KERN_WARNING DRV_MODULE_NAME
392 ": %s HEY! Enet xmit interrupt and TX_READY.\n",
393 dev->name);
394
395 /*
396 * Deferred means some collisions occurred during transmit,
397 * but we eventually sent the packet OK.
398 */
399 if (sc & BD_ENET_TX_DEF)
400 fep->stats.collisions++;
401
402 /* unmap */
403 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
404 skb->len, DMA_TO_DEVICE);
405
406 /*
407 * Free the sk buffer associated with this last transmit.
408 */
409 dev_kfree_skb_irq(skb);
410 fep->tx_skbuff[dirtyidx] = NULL;
411
412 /*
413 * Update pointer to next buffer descriptor to be transmitted.
414 */
415 if ((sc & BD_ENET_TX_WRAP) == 0)
416 bdp++;
417 else
418 bdp = fep->tx_bd_base;
419
420 /*
421 * Since we have freed up a buffer, the ring is no longer
422 * full.
423 */
424 if (!fep->tx_free++)
425 do_wake = 1;
426 }
427
428 fep->dirty_tx = bdp;
429
430 if (do_restart)
431 (*fep->ops->tx_restart)(dev);
432
433 spin_unlock(&fep->lock);
434
435 if (do_wake)
436 netif_wake_queue(dev);
437 }
438
439 /*
440 * The interrupt handler.
441 * This is called from the MPC core interrupt.
442 */
443 static irqreturn_t
444 fs_enet_interrupt(int irq, void *dev_id, struct pt_regs *regs)
445 {
446 struct net_device *dev = dev_id;
447 struct fs_enet_private *fep;
448 const struct fs_platform_info *fpi;
449 u32 int_events;
450 u32 int_clr_events;
451 int nr, napi_ok;
452 int handled;
453
454 fep = netdev_priv(dev);
455 fpi = fep->fpi;
456
457 nr = 0;
458 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
459
460 nr++;
461
462 int_clr_events = int_events;
463 if (fpi->use_napi)
464 int_clr_events &= ~fep->ev_napi_rx;
465
466 (*fep->ops->clear_int_events)(dev, int_clr_events);
467
468 if (int_events & fep->ev_err)
469 (*fep->ops->ev_error)(dev, int_events);
470
471 if (int_events & fep->ev_rx) {
472 if (!fpi->use_napi)
473 fs_enet_rx_non_napi(dev);
474 else {
475 napi_ok = netif_rx_schedule_prep(dev);
476
477 (*fep->ops->napi_disable_rx)(dev);
478 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
479
480 /* NOTE: it is possible for FCCs in NAPI mode */
481 /* to submit a spurious interrupt while in poll */
482 if (napi_ok)
483 __netif_rx_schedule(dev);
484 }
485 }
486
487 if (int_events & fep->ev_tx)
488 fs_enet_tx(dev);
489 }
490
491 handled = nr > 0;
492 return IRQ_RETVAL(handled);
493 }
494
495 void fs_init_bds(struct net_device *dev)
496 {
497 struct fs_enet_private *fep = netdev_priv(dev);
498 cbd_t *bdp;
499 struct sk_buff *skb;
500 int i;
501
502 fs_cleanup_bds(dev);
503
504 fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
505 fep->tx_free = fep->tx_ring;
506 fep->cur_rx = fep->rx_bd_base;
507
508 /*
509 * Initialize the receive buffer descriptors.
510 */
511 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
512 skb = dev_alloc_skb(ENET_RX_FRSIZE);
513 if (skb == NULL) {
514 printk(KERN_WARNING DRV_MODULE_NAME
515 ": %s Memory squeeze, unable to allocate skb\n",
516 dev->name);
517 break;
518 }
519 fep->rx_skbuff[i] = skb;
520 skb->dev = dev;
521 CBDW_BUFADDR(bdp,
522 dma_map_single(fep->dev, skb->data,
523 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
524 DMA_FROM_DEVICE));
525 CBDW_DATLEN(bdp, 0); /* zero */
526 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
527 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
528 }
529 /*
530 * if we failed, fillup remainder
531 */
532 for (; i < fep->rx_ring; i++, bdp++) {
533 fep->rx_skbuff[i] = NULL;
534 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
535 }
536
537 /*
538 * ...and the same for transmit.
539 */
540 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
541 fep->tx_skbuff[i] = NULL;
542 CBDW_BUFADDR(bdp, 0);
543 CBDW_DATLEN(bdp, 0);
544 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
545 }
546 }
547
548 void fs_cleanup_bds(struct net_device *dev)
549 {
550 struct fs_enet_private *fep = netdev_priv(dev);
551 struct sk_buff *skb;
552 cbd_t *bdp;
553 int i;
554
555 /*
556 * Reset SKB transmit buffers.
557 */
558 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
559 if ((skb = fep->tx_skbuff[i]) == NULL)
560 continue;
561
562 /* unmap */
563 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
564 skb->len, DMA_TO_DEVICE);
565
566 fep->tx_skbuff[i] = NULL;
567 dev_kfree_skb(skb);
568 }
569
570 /*
571 * Reset SKB receive buffers
572 */
573 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
574 if ((skb = fep->rx_skbuff[i]) == NULL)
575 continue;
576
577 /* unmap */
578 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
579 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
580 DMA_FROM_DEVICE);
581
582 fep->rx_skbuff[i] = NULL;
583
584 dev_kfree_skb(skb);
585 }
586 }
587
588 /**********************************************************************************/
589
590 static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
591 {
592 struct fs_enet_private *fep = netdev_priv(dev);
593 cbd_t *bdp;
594 int curidx;
595 u16 sc;
596 unsigned long flags;
597
598 spin_lock_irqsave(&fep->tx_lock, flags);
599
600 /*
601 * Fill in a Tx ring entry
602 */
603 bdp = fep->cur_tx;
604
605 if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
606 netif_stop_queue(dev);
607 spin_unlock_irqrestore(&fep->tx_lock, flags);
608
609 /*
610 * Ooops. All transmit buffers are full. Bail out.
611 * This should not happen, since the tx queue should be stopped.
612 */
613 printk(KERN_WARNING DRV_MODULE_NAME
614 ": %s tx queue full!.\n", dev->name);
615 return NETDEV_TX_BUSY;
616 }
617
618 curidx = bdp - fep->tx_bd_base;
619 /*
620 * Clear all of the status flags.
621 */
622 CBDC_SC(bdp, BD_ENET_TX_STATS);
623
624 /*
625 * Save skb pointer.
626 */
627 fep->tx_skbuff[curidx] = skb;
628
629 fep->stats.tx_bytes += skb->len;
630
631 /*
632 * Push the data cache so the CPM does not get stale memory data.
633 */
634 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
635 skb->data, skb->len, DMA_TO_DEVICE));
636 CBDW_DATLEN(bdp, skb->len);
637
638 dev->trans_start = jiffies;
639
640 /*
641 * If this was the last BD in the ring, start at the beginning again.
642 */
643 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
644 fep->cur_tx++;
645 else
646 fep->cur_tx = fep->tx_bd_base;
647
648 if (!--fep->tx_free)
649 netif_stop_queue(dev);
650
651 /* Trigger transmission start */
652 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
653 BD_ENET_TX_LAST | BD_ENET_TX_TC;
654
655 /* note that while FEC does not have this bit
656 * it marks it as available for software use
657 * yay for hw reuse :) */
658 if (skb->len <= 60)
659 sc |= BD_ENET_TX_PAD;
660 CBDS_SC(bdp, sc);
661
662 (*fep->ops->tx_kickstart)(dev);
663
664 spin_unlock_irqrestore(&fep->tx_lock, flags);
665
666 return NETDEV_TX_OK;
667 }
668
669 static int fs_request_irq(struct net_device *dev, int irq, const char *name,
670 irqreturn_t (*irqf)(int irq, void *dev_id, struct pt_regs *regs))
671 {
672 struct fs_enet_private *fep = netdev_priv(dev);
673
674 (*fep->ops->pre_request_irq)(dev, irq);
675 return request_irq(irq, irqf, SA_SHIRQ, name, dev);
676 }
677
678 static void fs_free_irq(struct net_device *dev, int irq)
679 {
680 struct fs_enet_private *fep = netdev_priv(dev);
681
682 free_irq(irq, dev);
683 (*fep->ops->post_free_irq)(dev, irq);
684 }
685
686 /**********************************************************************************/
687
688 /* This interrupt occurs when the PHY detects a link change. */
689 static irqreturn_t
690 fs_mii_link_interrupt(int irq, void *dev_id, struct pt_regs *regs)
691 {
692 struct net_device *dev = dev_id;
693 struct fs_enet_private *fep;
694 const struct fs_platform_info *fpi;
695
696 fep = netdev_priv(dev);
697 fpi = fep->fpi;
698
699 /*
700 * Acknowledge the interrupt if possible. If we have not
701 * found the PHY yet we can't process or acknowledge the
702 * interrupt now. Instead we ignore this interrupt for now,
703 * which we can do since it is edge triggered. It will be
704 * acknowledged later by fs_enet_open().
705 */
706 if (!fep->phy)
707 return IRQ_NONE;
708
709 fs_mii_ack_int(dev);
710 fs_mii_link_status_change_check(dev, 0);
711
712 return IRQ_HANDLED;
713 }
714
715 static void fs_timeout(struct net_device *dev)
716 {
717 struct fs_enet_private *fep = netdev_priv(dev);
718 unsigned long flags;
719 int wake = 0;
720
721 fep->stats.tx_errors++;
722
723 spin_lock_irqsave(&fep->lock, flags);
724
725 if (dev->flags & IFF_UP) {
726 (*fep->ops->stop)(dev);
727 (*fep->ops->restart)(dev);
728 }
729
730 wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
731 spin_unlock_irqrestore(&fep->lock, flags);
732
733 if (wake)
734 netif_wake_queue(dev);
735 }
736
737 static int fs_enet_open(struct net_device *dev)
738 {
739 struct fs_enet_private *fep = netdev_priv(dev);
740 const struct fs_platform_info *fpi = fep->fpi;
741 int r;
742
743 /* Install our interrupt handler. */
744 r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
745 if (r != 0) {
746 printk(KERN_ERR DRV_MODULE_NAME
747 ": %s Could not allocate FEC IRQ!", dev->name);
748 return -EINVAL;
749 }
750
751 /* Install our phy interrupt handler */
752 if (fpi->phy_irq != -1) {
753
754 r = fs_request_irq(dev, fpi->phy_irq, "fs_enet-phy", fs_mii_link_interrupt);
755 if (r != 0) {
756 printk(KERN_ERR DRV_MODULE_NAME
757 ": %s Could not allocate PHY IRQ!", dev->name);
758 fs_free_irq(dev, fep->interrupt);
759 return -EINVAL;
760 }
761 }
762
763 fs_mii_startup(dev);
764 netif_carrier_off(dev);
765 fs_mii_link_status_change_check(dev, 1);
766
767 return 0;
768 }
769
770 static int fs_enet_close(struct net_device *dev)
771 {
772 struct fs_enet_private *fep = netdev_priv(dev);
773 const struct fs_platform_info *fpi = fep->fpi;
774 unsigned long flags;
775
776 netif_stop_queue(dev);
777 netif_carrier_off(dev);
778 fs_mii_shutdown(dev);
779
780 spin_lock_irqsave(&fep->lock, flags);
781 (*fep->ops->stop)(dev);
782 spin_unlock_irqrestore(&fep->lock, flags);
783
784 /* release any irqs */
785 if (fpi->phy_irq != -1)
786 fs_free_irq(dev, fpi->phy_irq);
787 fs_free_irq(dev, fep->interrupt);
788
789 return 0;
790 }
791
792 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
793 {
794 struct fs_enet_private *fep = netdev_priv(dev);
795 return &fep->stats;
796 }
797
798 /*************************************************************************/
799
800 static void fs_get_drvinfo(struct net_device *dev,
801 struct ethtool_drvinfo *info)
802 {
803 strcpy(info->driver, DRV_MODULE_NAME);
804 strcpy(info->version, DRV_MODULE_VERSION);
805 }
806
807 static int fs_get_regs_len(struct net_device *dev)
808 {
809 struct fs_enet_private *fep = netdev_priv(dev);
810
811 return (*fep->ops->get_regs_len)(dev);
812 }
813
814 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
815 void *p)
816 {
817 struct fs_enet_private *fep = netdev_priv(dev);
818 unsigned long flags;
819 int r, len;
820
821 len = regs->len;
822
823 spin_lock_irqsave(&fep->lock, flags);
824 r = (*fep->ops->get_regs)(dev, p, &len);
825 spin_unlock_irqrestore(&fep->lock, flags);
826
827 if (r == 0)
828 regs->version = 0;
829 }
830
831 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
832 {
833 struct fs_enet_private *fep = netdev_priv(dev);
834 unsigned long flags;
835 int rc;
836
837 spin_lock_irqsave(&fep->lock, flags);
838 rc = mii_ethtool_gset(&fep->mii_if, cmd);
839 spin_unlock_irqrestore(&fep->lock, flags);
840
841 return rc;
842 }
843
844 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
845 {
846 struct fs_enet_private *fep = netdev_priv(dev);
847 unsigned long flags;
848 int rc;
849
850 spin_lock_irqsave(&fep->lock, flags);
851 rc = mii_ethtool_sset(&fep->mii_if, cmd);
852 spin_unlock_irqrestore(&fep->lock, flags);
853
854 return rc;
855 }
856
857 static int fs_nway_reset(struct net_device *dev)
858 {
859 struct fs_enet_private *fep = netdev_priv(dev);
860 return mii_nway_restart(&fep->mii_if);
861 }
862
863 static u32 fs_get_msglevel(struct net_device *dev)
864 {
865 struct fs_enet_private *fep = netdev_priv(dev);
866 return fep->msg_enable;
867 }
868
869 static void fs_set_msglevel(struct net_device *dev, u32 value)
870 {
871 struct fs_enet_private *fep = netdev_priv(dev);
872 fep->msg_enable = value;
873 }
874
875 static struct ethtool_ops fs_ethtool_ops = {
876 .get_drvinfo = fs_get_drvinfo,
877 .get_regs_len = fs_get_regs_len,
878 .get_settings = fs_get_settings,
879 .set_settings = fs_set_settings,
880 .nway_reset = fs_nway_reset,
881 .get_link = ethtool_op_get_link,
882 .get_msglevel = fs_get_msglevel,
883 .set_msglevel = fs_set_msglevel,
884 .get_tx_csum = ethtool_op_get_tx_csum,
885 .set_tx_csum = ethtool_op_set_tx_csum, /* local! */
886 .get_sg = ethtool_op_get_sg,
887 .set_sg = ethtool_op_set_sg,
888 .get_regs = fs_get_regs,
889 };
890
891 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
892 {
893 struct fs_enet_private *fep = netdev_priv(dev);
894 struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
895 unsigned long flags;
896 int rc;
897
898 if (!netif_running(dev))
899 return -EINVAL;
900
901 spin_lock_irqsave(&fep->lock, flags);
902 rc = generic_mii_ioctl(&fep->mii_if, mii, cmd, NULL);
903 spin_unlock_irqrestore(&fep->lock, flags);
904 return rc;
905 }
906
907 extern int fs_mii_connect(struct net_device *dev);
908 extern void fs_mii_disconnect(struct net_device *dev);
909
910 static struct net_device *fs_init_instance(struct device *dev,
911 const struct fs_platform_info *fpi)
912 {
913 struct net_device *ndev = NULL;
914 struct fs_enet_private *fep = NULL;
915 int privsize, i, r, err = 0, registered = 0;
916
917 /* guard */
918 if ((unsigned int)fpi->fs_no >= FS_MAX_INDEX)
919 return ERR_PTR(-EINVAL);
920
921 privsize = sizeof(*fep) + (sizeof(struct sk_buff **) *
922 (fpi->rx_ring + fpi->tx_ring));
923
924 ndev = alloc_etherdev(privsize);
925 if (!ndev) {
926 err = -ENOMEM;
927 goto err;
928 }
929 SET_MODULE_OWNER(ndev);
930
931 fep = netdev_priv(ndev);
932 memset(fep, 0, privsize); /* clear everything */
933
934 fep->dev = dev;
935 dev_set_drvdata(dev, ndev);
936 fep->fpi = fpi;
937 if (fpi->init_ioports)
938 fpi->init_ioports();
939
940 #ifdef CONFIG_FS_ENET_HAS_FEC
941 if (fs_get_fec_index(fpi->fs_no) >= 0)
942 fep->ops = &fs_fec_ops;
943 #endif
944
945 #ifdef CONFIG_FS_ENET_HAS_SCC
946 if (fs_get_scc_index(fpi->fs_no) >=0 )
947 fep->ops = &fs_scc_ops;
948 #endif
949
950 #ifdef CONFIG_FS_ENET_HAS_FCC
951 if (fs_get_fcc_index(fpi->fs_no) >= 0)
952 fep->ops = &fs_fcc_ops;
953 #endif
954
955 if (fep->ops == NULL) {
956 printk(KERN_ERR DRV_MODULE_NAME
957 ": %s No matching ops found (%d).\n",
958 ndev->name, fpi->fs_no);
959 err = -EINVAL;
960 goto err;
961 }
962
963 r = (*fep->ops->setup_data)(ndev);
964 if (r != 0) {
965 printk(KERN_ERR DRV_MODULE_NAME
966 ": %s setup_data failed\n",
967 ndev->name);
968 err = r;
969 goto err;
970 }
971
972 /* point rx_skbuff, tx_skbuff */
973 fep->rx_skbuff = (struct sk_buff **)&fep[1];
974 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
975
976 /* init locks */
977 spin_lock_init(&fep->lock);
978 spin_lock_init(&fep->tx_lock);
979
980 /*
981 * Set the Ethernet address.
982 */
983 for (i = 0; i < 6; i++)
984 ndev->dev_addr[i] = fpi->macaddr[i];
985
986 r = (*fep->ops->allocate_bd)(ndev);
987
988 if (fep->ring_base == NULL) {
989 printk(KERN_ERR DRV_MODULE_NAME
990 ": %s buffer descriptor alloc failed (%d).\n", ndev->name, r);
991 err = r;
992 goto err;
993 }
994
995 /*
996 * Set receive and transmit descriptor base.
997 */
998 fep->rx_bd_base = fep->ring_base;
999 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1000
1001 /* initialize ring size variables */
1002 fep->tx_ring = fpi->tx_ring;
1003 fep->rx_ring = fpi->rx_ring;
1004
1005 /*
1006 * The FEC Ethernet specific entries in the device structure.
1007 */
1008 ndev->open = fs_enet_open;
1009 ndev->hard_start_xmit = fs_enet_start_xmit;
1010 ndev->tx_timeout = fs_timeout;
1011 ndev->watchdog_timeo = 2 * HZ;
1012 ndev->stop = fs_enet_close;
1013 ndev->get_stats = fs_enet_get_stats;
1014 ndev->set_multicast_list = fs_set_multicast_list;
1015 if (fpi->use_napi) {
1016 ndev->poll = fs_enet_rx_napi;
1017 ndev->weight = fpi->napi_weight;
1018 }
1019 ndev->ethtool_ops = &fs_ethtool_ops;
1020 ndev->do_ioctl = fs_ioctl;
1021
1022 init_timer(&fep->phy_timer_list);
1023
1024 netif_carrier_off(ndev);
1025
1026 err = register_netdev(ndev);
1027 if (err != 0) {
1028 printk(KERN_ERR DRV_MODULE_NAME
1029 ": %s register_netdev failed.\n", ndev->name);
1030 goto err;
1031 }
1032 registered = 1;
1033
1034 err = fs_mii_connect(ndev);
1035 if (err != 0) {
1036 printk(KERN_ERR DRV_MODULE_NAME
1037 ": %s fs_mii_connect failed.\n", ndev->name);
1038 goto err;
1039 }
1040
1041 return ndev;
1042
1043 err:
1044 if (ndev != NULL) {
1045
1046 if (registered)
1047 unregister_netdev(ndev);
1048
1049 if (fep != NULL) {
1050 (*fep->ops->free_bd)(ndev);
1051 (*fep->ops->cleanup_data)(ndev);
1052 }
1053
1054 free_netdev(ndev);
1055 }
1056
1057 dev_set_drvdata(dev, NULL);
1058
1059 return ERR_PTR(err);
1060 }
1061
1062 static int fs_cleanup_instance(struct net_device *ndev)
1063 {
1064 struct fs_enet_private *fep;
1065 const struct fs_platform_info *fpi;
1066 struct device *dev;
1067
1068 if (ndev == NULL)
1069 return -EINVAL;
1070
1071 fep = netdev_priv(ndev);
1072 if (fep == NULL)
1073 return -EINVAL;
1074
1075 fpi = fep->fpi;
1076
1077 fs_mii_disconnect(ndev);
1078
1079 unregister_netdev(ndev);
1080
1081 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
1082 fep->ring_base, fep->ring_mem_addr);
1083
1084 /* reset it */
1085 (*fep->ops->cleanup_data)(ndev);
1086
1087 dev = fep->dev;
1088 if (dev != NULL) {
1089 dev_set_drvdata(dev, NULL);
1090 fep->dev = NULL;
1091 }
1092
1093 free_netdev(ndev);
1094
1095 return 0;
1096 }
1097
1098 /**************************************************************************************/
1099
1100 /* handy pointer to the immap */
1101 void *fs_enet_immap = NULL;
1102
1103 static int setup_immap(void)
1104 {
1105 phys_addr_t paddr = 0;
1106 unsigned long size = 0;
1107
1108 #ifdef CONFIG_CPM1
1109 paddr = IMAP_ADDR;
1110 size = 0x10000; /* map 64K */
1111 #endif
1112
1113 #ifdef CONFIG_CPM2
1114 paddr = CPM_MAP_ADDR;
1115 size = 0x40000; /* map 256 K */
1116 #endif
1117 fs_enet_immap = ioremap(paddr, size);
1118 if (fs_enet_immap == NULL)
1119 return -EBADF; /* XXX ahem; maybe just BUG_ON? */
1120
1121 return 0;
1122 }
1123
1124 static void cleanup_immap(void)
1125 {
1126 if (fs_enet_immap != NULL) {
1127 iounmap(fs_enet_immap);
1128 fs_enet_immap = NULL;
1129 }
1130 }
1131
1132 /**************************************************************************************/
1133
1134 static int __devinit fs_enet_probe(struct device *dev)
1135 {
1136 struct net_device *ndev;
1137
1138 /* no fixup - no device */
1139 if (dev->platform_data == NULL) {
1140 printk(KERN_INFO "fs_enet: "
1141 "probe called with no platform data; "
1142 "remove unused devices\n");
1143 return -ENODEV;
1144 }
1145
1146 ndev = fs_init_instance(dev, dev->platform_data);
1147 if (IS_ERR(ndev))
1148 return PTR_ERR(ndev);
1149 return 0;
1150 }
1151
1152 static int fs_enet_remove(struct device *dev)
1153 {
1154 return fs_cleanup_instance(dev_get_drvdata(dev));
1155 }
1156
1157 static struct device_driver fs_enet_fec_driver = {
1158 .name = "fsl-cpm-fec",
1159 .bus = &platform_bus_type,
1160 .probe = fs_enet_probe,
1161 .remove = fs_enet_remove,
1162 #ifdef CONFIG_PM
1163 /* .suspend = fs_enet_suspend, TODO */
1164 /* .resume = fs_enet_resume, TODO */
1165 #endif
1166 };
1167
1168 static struct device_driver fs_enet_scc_driver = {
1169 .name = "fsl-cpm-scc",
1170 .bus = &platform_bus_type,
1171 .probe = fs_enet_probe,
1172 .remove = fs_enet_remove,
1173 #ifdef CONFIG_PM
1174 /* .suspend = fs_enet_suspend, TODO */
1175 /* .resume = fs_enet_resume, TODO */
1176 #endif
1177 };
1178
1179 static struct device_driver fs_enet_fcc_driver = {
1180 .name = "fsl-cpm-fcc",
1181 .bus = &platform_bus_type,
1182 .probe = fs_enet_probe,
1183 .remove = fs_enet_remove,
1184 #ifdef CONFIG_PM
1185 /* .suspend = fs_enet_suspend, TODO */
1186 /* .resume = fs_enet_resume, TODO */
1187 #endif
1188 };
1189
1190 static int __init fs_init(void)
1191 {
1192 int r;
1193
1194 printk(KERN_INFO
1195 "%s", version);
1196
1197 r = setup_immap();
1198 if (r != 0)
1199 return r;
1200 r = driver_register(&fs_enet_fec_driver);
1201 if (r != 0)
1202 goto err;
1203
1204 r = driver_register(&fs_enet_fcc_driver);
1205 if (r != 0)
1206 goto err;
1207
1208 r = driver_register(&fs_enet_scc_driver);
1209 if (r != 0)
1210 goto err;
1211
1212 return 0;
1213 err:
1214 cleanup_immap();
1215 return r;
1216
1217 }
1218
1219 static void __exit fs_cleanup(void)
1220 {
1221 driver_unregister(&fs_enet_fec_driver);
1222 driver_unregister(&fs_enet_fcc_driver);
1223 driver_unregister(&fs_enet_scc_driver);
1224 cleanup_immap();
1225 }
1226
1227 /**************************************************************************************/
1228
1229 module_init(fs_init);
1230 module_exit(fs_cleanup);
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