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25#include <linux/dma-mapping.h>
26#include <linux/module.h>
27#include <linux/uaccess.h>
28#include <linux/interrupt.h>
29#include <linux/netdevice.h>
30#include <linux/etherdevice.h>
31#include <linux/ethtool.h>
32#include <linux/skbuff.h>
33#include <linux/io.h>
34#include <linux/crc32.h>
35#include <linux/mii.h>
36#include <linux/of_device.h>
37#include <linux/of_net.h>
38#include <linux/of_platform.h>
39#include <linux/slab.h>
40#include <asm/cacheflush.h>
41#include <asm/byteorder.h>
42
43#ifdef CONFIG_SPARC
44#include <asm/idprom.h>
45#endif
46
47#include "greth.h"
48
49#define GRETH_DEF_MSG_ENABLE \
50 (NETIF_MSG_DRV | \
51 NETIF_MSG_PROBE | \
52 NETIF_MSG_LINK | \
53 NETIF_MSG_IFDOWN | \
54 NETIF_MSG_IFUP | \
55 NETIF_MSG_RX_ERR | \
56 NETIF_MSG_TX_ERR)
57
58static int greth_debug = -1;
59module_param(greth_debug, int, 0);
60MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value");
61
62
63static int macaddr[6];
64module_param_array(macaddr, int, NULL, 0);
65MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address");
66
67static int greth_edcl = 1;
68module_param(greth_edcl, int, 0);
69MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used.");
70
71static int greth_open(struct net_device *dev);
72static netdev_tx_t greth_start_xmit(struct sk_buff *skb,
73 struct net_device *dev);
74static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb,
75 struct net_device *dev);
76static int greth_rx(struct net_device *dev, int limit);
77static int greth_rx_gbit(struct net_device *dev, int limit);
78static void greth_clean_tx(struct net_device *dev);
79static void greth_clean_tx_gbit(struct net_device *dev);
80static irqreturn_t greth_interrupt(int irq, void *dev_id);
81static int greth_close(struct net_device *dev);
82static int greth_set_mac_add(struct net_device *dev, void *p);
83static void greth_set_multicast_list(struct net_device *dev);
84
85#define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a))))
86#define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a)))
87#define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v))))
88#define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v))))
89
90#define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK)
91#define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK)
92#define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK)
93
94static void greth_print_rx_packet(void *addr, int len)
95{
96 print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1,
97 addr, len, true);
98}
99
100static void greth_print_tx_packet(struct sk_buff *skb)
101{
102 int i;
103 int length;
104
105 if (skb_shinfo(skb)->nr_frags == 0)
106 length = skb->len;
107 else
108 length = skb_headlen(skb);
109
110 print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
111 skb->data, length, true);
112
113 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
114
115 print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
116 skb_frag_address(&skb_shinfo(skb)->frags[i]),
117 skb_shinfo(skb)->frags[i].size, true);
118 }
119}
120
121static inline void greth_enable_tx(struct greth_private *greth)
122{
123 wmb();
124 GRETH_REGORIN(greth->regs->control, GRETH_TXEN);
125}
126
127static inline void greth_enable_tx_and_irq(struct greth_private *greth)
128{
129 wmb();
130 GRETH_REGORIN(greth->regs->control, GRETH_TXEN | GRETH_TXI);
131}
132
133static inline void greth_disable_tx(struct greth_private *greth)
134{
135 GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN);
136}
137
138static inline void greth_enable_rx(struct greth_private *greth)
139{
140 wmb();
141 GRETH_REGORIN(greth->regs->control, GRETH_RXEN);
142}
143
144static inline void greth_disable_rx(struct greth_private *greth)
145{
146 GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN);
147}
148
149static inline void greth_enable_irqs(struct greth_private *greth)
150{
151 GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI);
152}
153
154static inline void greth_disable_irqs(struct greth_private *greth)
155{
156 GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI));
157}
158
159static inline void greth_write_bd(u32 *bd, u32 val)
160{
161 __raw_writel(cpu_to_be32(val), bd);
162}
163
164static inline u32 greth_read_bd(u32 *bd)
165{
166 return be32_to_cpu(__raw_readl(bd));
167}
168
169static void greth_clean_rings(struct greth_private *greth)
170{
171 int i;
172 struct greth_bd *rx_bdp = greth->rx_bd_base;
173 struct greth_bd *tx_bdp = greth->tx_bd_base;
174
175 if (greth->gbit_mac) {
176
177
178 for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) {
179 if (greth->rx_skbuff[i] != NULL) {
180 dev_kfree_skb(greth->rx_skbuff[i]);
181 dma_unmap_single(greth->dev,
182 greth_read_bd(&rx_bdp->addr),
183 MAX_FRAME_SIZE+NET_IP_ALIGN,
184 DMA_FROM_DEVICE);
185 }
186 }
187
188
189 while (greth->tx_free < GRETH_TXBD_NUM) {
190
191 struct sk_buff *skb = greth->tx_skbuff[greth->tx_last];
192 int nr_frags = skb_shinfo(skb)->nr_frags;
193 tx_bdp = greth->tx_bd_base + greth->tx_last;
194 greth->tx_last = NEXT_TX(greth->tx_last);
195
196 dma_unmap_single(greth->dev,
197 greth_read_bd(&tx_bdp->addr),
198 skb_headlen(skb),
199 DMA_TO_DEVICE);
200
201 for (i = 0; i < nr_frags; i++) {
202 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
203 tx_bdp = greth->tx_bd_base + greth->tx_last;
204
205 dma_unmap_page(greth->dev,
206 greth_read_bd(&tx_bdp->addr),
207 skb_frag_size(frag),
208 DMA_TO_DEVICE);
209
210 greth->tx_last = NEXT_TX(greth->tx_last);
211 }
212 greth->tx_free += nr_frags+1;
213 dev_kfree_skb(skb);
214 }
215
216
217 } else {
218
219 for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) {
220 kfree(greth->rx_bufs[i]);
221 dma_unmap_single(greth->dev,
222 greth_read_bd(&rx_bdp->addr),
223 MAX_FRAME_SIZE,
224 DMA_FROM_DEVICE);
225 }
226 for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) {
227 kfree(greth->tx_bufs[i]);
228 dma_unmap_single(greth->dev,
229 greth_read_bd(&tx_bdp->addr),
230 MAX_FRAME_SIZE,
231 DMA_TO_DEVICE);
232 }
233 }
234}
235
236static int greth_init_rings(struct greth_private *greth)
237{
238 struct sk_buff *skb;
239 struct greth_bd *rx_bd, *tx_bd;
240 u32 dma_addr;
241 int i;
242
243 rx_bd = greth->rx_bd_base;
244 tx_bd = greth->tx_bd_base;
245
246
247 if (greth->gbit_mac) {
248
249 for (i = 0; i < GRETH_RXBD_NUM; i++) {
250 skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN);
251 if (skb == NULL) {
252 if (netif_msg_ifup(greth))
253 dev_err(greth->dev, "Error allocating DMA ring.\n");
254 goto cleanup;
255 }
256 skb_reserve(skb, NET_IP_ALIGN);
257 dma_addr = dma_map_single(greth->dev,
258 skb->data,
259 MAX_FRAME_SIZE+NET_IP_ALIGN,
260 DMA_FROM_DEVICE);
261
262 if (dma_mapping_error(greth->dev, dma_addr)) {
263 if (netif_msg_ifup(greth))
264 dev_err(greth->dev, "Could not create initial DMA mapping\n");
265 goto cleanup;
266 }
267 greth->rx_skbuff[i] = skb;
268 greth_write_bd(&rx_bd[i].addr, dma_addr);
269 greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE);
270 }
271
272 } else {
273
274
275 for (i = 0; i < GRETH_RXBD_NUM; i++) {
276
277 greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL);
278
279 if (greth->rx_bufs[i] == NULL) {
280 if (netif_msg_ifup(greth))
281 dev_err(greth->dev, "Error allocating DMA ring.\n");
282 goto cleanup;
283 }
284
285 dma_addr = dma_map_single(greth->dev,
286 greth->rx_bufs[i],
287 MAX_FRAME_SIZE,
288 DMA_FROM_DEVICE);
289
290 if (dma_mapping_error(greth->dev, dma_addr)) {
291 if (netif_msg_ifup(greth))
292 dev_err(greth->dev, "Could not create initial DMA mapping\n");
293 goto cleanup;
294 }
295 greth_write_bd(&rx_bd[i].addr, dma_addr);
296 greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE);
297 }
298 for (i = 0; i < GRETH_TXBD_NUM; i++) {
299
300 greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL);
301
302 if (greth->tx_bufs[i] == NULL) {
303 if (netif_msg_ifup(greth))
304 dev_err(greth->dev, "Error allocating DMA ring.\n");
305 goto cleanup;
306 }
307
308 dma_addr = dma_map_single(greth->dev,
309 greth->tx_bufs[i],
310 MAX_FRAME_SIZE,
311 DMA_TO_DEVICE);
312
313 if (dma_mapping_error(greth->dev, dma_addr)) {
314 if (netif_msg_ifup(greth))
315 dev_err(greth->dev, "Could not create initial DMA mapping\n");
316 goto cleanup;
317 }
318 greth_write_bd(&tx_bd[i].addr, dma_addr);
319 greth_write_bd(&tx_bd[i].stat, 0);
320 }
321 }
322 greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat,
323 greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR);
324
325
326 greth->rx_cur = 0;
327 greth->tx_next = 0;
328 greth->tx_last = 0;
329 greth->tx_free = GRETH_TXBD_NUM;
330
331
332 GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys);
333 GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys);
334
335 return 0;
336
337cleanup:
338 greth_clean_rings(greth);
339 return -ENOMEM;
340}
341
342static int greth_open(struct net_device *dev)
343{
344 struct greth_private *greth = netdev_priv(dev);
345 int err;
346
347 err = greth_init_rings(greth);
348 if (err) {
349 if (netif_msg_ifup(greth))
350 dev_err(&dev->dev, "Could not allocate memory for DMA rings\n");
351 return err;
352 }
353
354 err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev);
355 if (err) {
356 if (netif_msg_ifup(greth))
357 dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq);
358 greth_clean_rings(greth);
359 return err;
360 }
361
362 if (netif_msg_ifup(greth))
363 dev_dbg(&dev->dev, " starting queue\n");
364 netif_start_queue(dev);
365
366 GRETH_REGSAVE(greth->regs->status, 0xFF);
367
368 napi_enable(&greth->napi);
369
370 greth_enable_irqs(greth);
371 greth_enable_tx(greth);
372 greth_enable_rx(greth);
373 return 0;
374
375}
376
377static int greth_close(struct net_device *dev)
378{
379 struct greth_private *greth = netdev_priv(dev);
380
381 napi_disable(&greth->napi);
382
383 greth_disable_irqs(greth);
384 greth_disable_tx(greth);
385 greth_disable_rx(greth);
386
387 netif_stop_queue(dev);
388
389 free_irq(greth->irq, (void *) dev);
390
391 greth_clean_rings(greth);
392
393 return 0;
394}
395
396static netdev_tx_t
397greth_start_xmit(struct sk_buff *skb, struct net_device *dev)
398{
399 struct greth_private *greth = netdev_priv(dev);
400 struct greth_bd *bdp;
401 int err = NETDEV_TX_OK;
402 u32 status, dma_addr, ctrl;
403 unsigned long flags;
404
405
406 greth_clean_tx(greth->netdev);
407
408 if (unlikely(greth->tx_free <= 0)) {
409 spin_lock_irqsave(&greth->devlock, flags);
410 ctrl = GRETH_REGLOAD(greth->regs->control);
411
412 if (ctrl & GRETH_RXI)
413 GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI);
414 netif_stop_queue(dev);
415 spin_unlock_irqrestore(&greth->devlock, flags);
416 return NETDEV_TX_BUSY;
417 }
418
419 if (netif_msg_pktdata(greth))
420 greth_print_tx_packet(skb);
421
422
423 if (unlikely(skb->len > MAX_FRAME_SIZE)) {
424 dev->stats.tx_errors++;
425 goto out;
426 }
427
428 bdp = greth->tx_bd_base + greth->tx_next;
429 dma_addr = greth_read_bd(&bdp->addr);
430
431 memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len);
432
433 dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE);
434
435 status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN);
436 greth->tx_bufs_length[greth->tx_next] = skb->len & GRETH_BD_LEN;
437
438
439 if (greth->tx_next == GRETH_TXBD_NUM_MASK) {
440 status |= GRETH_BD_WR;
441 }
442
443 greth->tx_next = NEXT_TX(greth->tx_next);
444 greth->tx_free--;
445
446
447 greth_write_bd(&bdp->stat, status);
448 spin_lock_irqsave(&greth->devlock, flags);
449 greth_enable_tx(greth);
450 spin_unlock_irqrestore(&greth->devlock, flags);
451
452out:
453 dev_kfree_skb(skb);
454 return err;
455}
456
457static inline u16 greth_num_free_bds(u16 tx_last, u16 tx_next)
458{
459 if (tx_next < tx_last)
460 return (tx_last - tx_next) - 1;
461 else
462 return GRETH_TXBD_NUM - (tx_next - tx_last) - 1;
463}
464
465static netdev_tx_t
466greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
467{
468 struct greth_private *greth = netdev_priv(dev);
469 struct greth_bd *bdp;
470 u32 status, dma_addr;
471 int curr_tx, nr_frags, i, err = NETDEV_TX_OK;
472 unsigned long flags;
473 u16 tx_last;
474
475 nr_frags = skb_shinfo(skb)->nr_frags;
476 tx_last = greth->tx_last;
477 rmb();
478
479 if (greth_num_free_bds(tx_last, greth->tx_next) < nr_frags + 1) {
480 netif_stop_queue(dev);
481 err = NETDEV_TX_BUSY;
482 goto out;
483 }
484
485 if (netif_msg_pktdata(greth))
486 greth_print_tx_packet(skb);
487
488 if (unlikely(skb->len > MAX_FRAME_SIZE)) {
489 dev->stats.tx_errors++;
490 goto out;
491 }
492
493
494 greth->tx_skbuff[greth->tx_next] = skb;
495
496
497 if (nr_frags != 0)
498 status = GRETH_TXBD_MORE;
499 else
500 status = GRETH_BD_IE;
501
502 if (skb->ip_summed == CHECKSUM_PARTIAL)
503 status |= GRETH_TXBD_CSALL;
504 status |= skb_headlen(skb) & GRETH_BD_LEN;
505 if (greth->tx_next == GRETH_TXBD_NUM_MASK)
506 status |= GRETH_BD_WR;
507
508
509 bdp = greth->tx_bd_base + greth->tx_next;
510 greth_write_bd(&bdp->stat, status);
511 dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
512
513 if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
514 goto map_error;
515
516 greth_write_bd(&bdp->addr, dma_addr);
517
518 curr_tx = NEXT_TX(greth->tx_next);
519
520
521 for (i = 0; i < nr_frags; i++) {
522 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
523 greth->tx_skbuff[curr_tx] = NULL;
524 bdp = greth->tx_bd_base + curr_tx;
525
526 status = GRETH_BD_EN;
527 if (skb->ip_summed == CHECKSUM_PARTIAL)
528 status |= GRETH_TXBD_CSALL;
529 status |= skb_frag_size(frag) & GRETH_BD_LEN;
530
531
532 if (curr_tx == GRETH_TXBD_NUM_MASK)
533 status |= GRETH_BD_WR;
534
535
536 if (i < nr_frags - 1)
537 status |= GRETH_TXBD_MORE;
538 else
539 status |= GRETH_BD_IE;
540
541 greth_write_bd(&bdp->stat, status);
542
543 dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag),
544 DMA_TO_DEVICE);
545
546 if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
547 goto frag_map_error;
548
549 greth_write_bd(&bdp->addr, dma_addr);
550
551 curr_tx = NEXT_TX(curr_tx);
552 }
553
554 wmb();
555
556
557 bdp = greth->tx_bd_base + greth->tx_next;
558 greth_write_bd(&bdp->stat,
559 greth_read_bd(&bdp->stat) | GRETH_BD_EN);
560
561 spin_lock_irqsave(&greth->devlock, flags);
562 greth->tx_next = curr_tx;
563 greth_enable_tx_and_irq(greth);
564 spin_unlock_irqrestore(&greth->devlock, flags);
565
566 return NETDEV_TX_OK;
567
568frag_map_error:
569
570 for (i = 0; greth->tx_next + i != curr_tx; i++) {
571 bdp = greth->tx_bd_base + greth->tx_next + i;
572 dma_unmap_single(greth->dev,
573 greth_read_bd(&bdp->addr),
574 greth_read_bd(&bdp->stat) & GRETH_BD_LEN,
575 DMA_TO_DEVICE);
576 greth_write_bd(&bdp->stat, 0);
577 }
578map_error:
579 if (net_ratelimit())
580 dev_warn(greth->dev, "Could not create TX DMA mapping\n");
581 dev_kfree_skb(skb);
582out:
583 return err;
584}
585
586static irqreturn_t greth_interrupt(int irq, void *dev_id)
587{
588 struct net_device *dev = dev_id;
589 struct greth_private *greth;
590 u32 status, ctrl;
591 irqreturn_t retval = IRQ_NONE;
592
593 greth = netdev_priv(dev);
594
595 spin_lock(&greth->devlock);
596
597
598 status = GRETH_REGLOAD(greth->regs->status);
599
600
601
602
603
604 ctrl = GRETH_REGLOAD(greth->regs->control);
605
606
607 if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) ||
608 ((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) {
609 retval = IRQ_HANDLED;
610
611
612 greth_disable_irqs(greth);
613 napi_schedule(&greth->napi);
614 }
615
616 spin_unlock(&greth->devlock);
617
618 return retval;
619}
620
621static void greth_clean_tx(struct net_device *dev)
622{
623 struct greth_private *greth;
624 struct greth_bd *bdp;
625 u32 stat;
626
627 greth = netdev_priv(dev);
628
629 while (1) {
630 bdp = greth->tx_bd_base + greth->tx_last;
631 GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
632 mb();
633 stat = greth_read_bd(&bdp->stat);
634
635 if (unlikely(stat & GRETH_BD_EN))
636 break;
637
638 if (greth->tx_free == GRETH_TXBD_NUM)
639 break;
640
641
642 if (unlikely(stat & GRETH_TXBD_STATUS)) {
643 dev->stats.tx_errors++;
644 if (stat & GRETH_TXBD_ERR_AL)
645 dev->stats.tx_aborted_errors++;
646 if (stat & GRETH_TXBD_ERR_UE)
647 dev->stats.tx_fifo_errors++;
648 }
649 dev->stats.tx_packets++;
650 dev->stats.tx_bytes += greth->tx_bufs_length[greth->tx_last];
651 greth->tx_last = NEXT_TX(greth->tx_last);
652 greth->tx_free++;
653 }
654
655 if (greth->tx_free > 0) {
656 netif_wake_queue(dev);
657 }
658}
659
660static inline void greth_update_tx_stats(struct net_device *dev, u32 stat)
661{
662
663 if (unlikely(stat & GRETH_TXBD_STATUS)) {
664 dev->stats.tx_errors++;
665 if (stat & GRETH_TXBD_ERR_AL)
666 dev->stats.tx_aborted_errors++;
667 if (stat & GRETH_TXBD_ERR_UE)
668 dev->stats.tx_fifo_errors++;
669 if (stat & GRETH_TXBD_ERR_LC)
670 dev->stats.tx_aborted_errors++;
671 }
672 dev->stats.tx_packets++;
673}
674
675static void greth_clean_tx_gbit(struct net_device *dev)
676{
677 struct greth_private *greth;
678 struct greth_bd *bdp, *bdp_last_frag;
679 struct sk_buff *skb = NULL;
680 u32 stat;
681 int nr_frags, i;
682 u16 tx_last;
683
684 greth = netdev_priv(dev);
685 tx_last = greth->tx_last;
686
687 while (tx_last != greth->tx_next) {
688
689 skb = greth->tx_skbuff[tx_last];
690
691 nr_frags = skb_shinfo(skb)->nr_frags;
692
693
694 bdp_last_frag = greth->tx_bd_base + SKIP_TX(tx_last, nr_frags);
695
696 GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
697 mb();
698 stat = greth_read_bd(&bdp_last_frag->stat);
699
700 if (stat & GRETH_BD_EN)
701 break;
702
703 greth->tx_skbuff[tx_last] = NULL;
704
705 greth_update_tx_stats(dev, stat);
706 dev->stats.tx_bytes += skb->len;
707
708 bdp = greth->tx_bd_base + tx_last;
709
710 tx_last = NEXT_TX(tx_last);
711
712 dma_unmap_single(greth->dev,
713 greth_read_bd(&bdp->addr),
714 skb_headlen(skb),
715 DMA_TO_DEVICE);
716
717 for (i = 0; i < nr_frags; i++) {
718 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
719 bdp = greth->tx_bd_base + tx_last;
720
721 dma_unmap_page(greth->dev,
722 greth_read_bd(&bdp->addr),
723 skb_frag_size(frag),
724 DMA_TO_DEVICE);
725
726 tx_last = NEXT_TX(tx_last);
727 }
728 dev_kfree_skb(skb);
729 }
730 if (skb) {
731 wmb();
732 greth->tx_last = tx_last;
733
734 if (netif_queue_stopped(dev) &&
735 (greth_num_free_bds(tx_last, greth->tx_next) >
736 (MAX_SKB_FRAGS+1)))
737 netif_wake_queue(dev);
738 }
739}
740
741static int greth_rx(struct net_device *dev, int limit)
742{
743 struct greth_private *greth;
744 struct greth_bd *bdp;
745 struct sk_buff *skb;
746 int pkt_len;
747 int bad, count;
748 u32 status, dma_addr;
749 unsigned long flags;
750
751 greth = netdev_priv(dev);
752
753 for (count = 0; count < limit; ++count) {
754
755 bdp = greth->rx_bd_base + greth->rx_cur;
756 GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
757 mb();
758 status = greth_read_bd(&bdp->stat);
759
760 if (unlikely(status & GRETH_BD_EN)) {
761 break;
762 }
763
764 dma_addr = greth_read_bd(&bdp->addr);
765 bad = 0;
766
767
768 if (unlikely(status & GRETH_RXBD_STATUS)) {
769 if (status & GRETH_RXBD_ERR_FT) {
770 dev->stats.rx_length_errors++;
771 bad = 1;
772 }
773 if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) {
774 dev->stats.rx_frame_errors++;
775 bad = 1;
776 }
777 if (status & GRETH_RXBD_ERR_CRC) {
778 dev->stats.rx_crc_errors++;
779 bad = 1;
780 }
781 }
782 if (unlikely(bad)) {
783 dev->stats.rx_errors++;
784
785 } else {
786
787 pkt_len = status & GRETH_BD_LEN;
788
789 skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN);
790
791 if (unlikely(skb == NULL)) {
792
793 if (net_ratelimit())
794 dev_warn(&dev->dev, "low on memory - " "packet dropped\n");
795
796 dev->stats.rx_dropped++;
797
798 } else {
799 skb_reserve(skb, NET_IP_ALIGN);
800
801 dma_sync_single_for_cpu(greth->dev,
802 dma_addr,
803 pkt_len,
804 DMA_FROM_DEVICE);
805
806 if (netif_msg_pktdata(greth))
807 greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len);
808
809 skb_put_data(skb, phys_to_virt(dma_addr),
810 pkt_len);
811
812 skb->protocol = eth_type_trans(skb, dev);
813 dev->stats.rx_bytes += pkt_len;
814 dev->stats.rx_packets++;
815 netif_receive_skb(skb);
816 }
817 }
818
819 status = GRETH_BD_EN | GRETH_BD_IE;
820 if (greth->rx_cur == GRETH_RXBD_NUM_MASK) {
821 status |= GRETH_BD_WR;
822 }
823
824 wmb();
825 greth_write_bd(&bdp->stat, status);
826
827 dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE);
828
829 spin_lock_irqsave(&greth->devlock, flags);
830 greth_enable_rx(greth);
831 spin_unlock_irqrestore(&greth->devlock, flags);
832
833 greth->rx_cur = NEXT_RX(greth->rx_cur);
834 }
835
836 return count;
837}
838
839static inline int hw_checksummed(u32 status)
840{
841
842 if (status & GRETH_RXBD_IP_FRAG)
843 return 0;
844
845 if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR)
846 return 0;
847
848 if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR)
849 return 0;
850
851 if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR)
852 return 0;
853
854 return 1;
855}
856
857static int greth_rx_gbit(struct net_device *dev, int limit)
858{
859 struct greth_private *greth;
860 struct greth_bd *bdp;
861 struct sk_buff *skb, *newskb;
862 int pkt_len;
863 int bad, count = 0;
864 u32 status, dma_addr;
865 unsigned long flags;
866
867 greth = netdev_priv(dev);
868
869 for (count = 0; count < limit; ++count) {
870
871 bdp = greth->rx_bd_base + greth->rx_cur;
872 skb = greth->rx_skbuff[greth->rx_cur];
873 GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
874 mb();
875 status = greth_read_bd(&bdp->stat);
876 bad = 0;
877
878 if (status & GRETH_BD_EN)
879 break;
880
881
882 if (unlikely(status & GRETH_RXBD_STATUS)) {
883
884 if (status & GRETH_RXBD_ERR_FT) {
885 dev->stats.rx_length_errors++;
886 bad = 1;
887 } else if (status &
888 (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) {
889 dev->stats.rx_frame_errors++;
890 bad = 1;
891 } else if (status & GRETH_RXBD_ERR_CRC) {
892 dev->stats.rx_crc_errors++;
893 bad = 1;
894 }
895 }
896
897
898
899 if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) {
900 skb_reserve(newskb, NET_IP_ALIGN);
901
902 dma_addr = dma_map_single(greth->dev,
903 newskb->data,
904 MAX_FRAME_SIZE + NET_IP_ALIGN,
905 DMA_FROM_DEVICE);
906
907 if (!dma_mapping_error(greth->dev, dma_addr)) {
908
909 pkt_len = status & GRETH_BD_LEN;
910
911 dma_unmap_single(greth->dev,
912 greth_read_bd(&bdp->addr),
913 MAX_FRAME_SIZE + NET_IP_ALIGN,
914 DMA_FROM_DEVICE);
915
916 if (netif_msg_pktdata(greth))
917 greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len);
918
919 skb_put(skb, pkt_len);
920
921 if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status))
922 skb->ip_summed = CHECKSUM_UNNECESSARY;
923 else
924 skb_checksum_none_assert(skb);
925
926 skb->protocol = eth_type_trans(skb, dev);
927 dev->stats.rx_packets++;
928 dev->stats.rx_bytes += pkt_len;
929 netif_receive_skb(skb);
930
931 greth->rx_skbuff[greth->rx_cur] = newskb;
932 greth_write_bd(&bdp->addr, dma_addr);
933 } else {
934 if (net_ratelimit())
935 dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n");
936 dev_kfree_skb(newskb);
937
938 dev->stats.rx_dropped++;
939 }
940 } else if (bad) {
941
942 dev->stats.rx_dropped++;
943 } else {
944
945
946
947
948
949
950 if (net_ratelimit())
951 dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n");
952
953 dev->stats.rx_dropped++;
954 }
955
956 status = GRETH_BD_EN | GRETH_BD_IE;
957 if (greth->rx_cur == GRETH_RXBD_NUM_MASK) {
958 status |= GRETH_BD_WR;
959 }
960
961 wmb();
962 greth_write_bd(&bdp->stat, status);
963 spin_lock_irqsave(&greth->devlock, flags);
964 greth_enable_rx(greth);
965 spin_unlock_irqrestore(&greth->devlock, flags);
966 greth->rx_cur = NEXT_RX(greth->rx_cur);
967 }
968
969 return count;
970
971}
972
973static int greth_poll(struct napi_struct *napi, int budget)
974{
975 struct greth_private *greth;
976 int work_done = 0;
977 unsigned long flags;
978 u32 mask, ctrl;
979 greth = container_of(napi, struct greth_private, napi);
980
981restart_txrx_poll:
982 if (greth->gbit_mac) {
983 greth_clean_tx_gbit(greth->netdev);
984 work_done += greth_rx_gbit(greth->netdev, budget - work_done);
985 } else {
986 if (netif_queue_stopped(greth->netdev))
987 greth_clean_tx(greth->netdev);
988 work_done += greth_rx(greth->netdev, budget - work_done);
989 }
990
991 if (work_done < budget) {
992
993 spin_lock_irqsave(&greth->devlock, flags);
994
995 ctrl = GRETH_REGLOAD(greth->regs->control);
996 if ((greth->gbit_mac && (greth->tx_last != greth->tx_next)) ||
997 (!greth->gbit_mac && netif_queue_stopped(greth->netdev))) {
998 GRETH_REGSAVE(greth->regs->control,
999 ctrl | GRETH_TXI | GRETH_RXI);
1000 mask = GRETH_INT_RX | GRETH_INT_RE |
1001 GRETH_INT_TX | GRETH_INT_TE;
1002 } else {
1003 GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI);
1004 mask = GRETH_INT_RX | GRETH_INT_RE;
1005 }
1006
1007 if (GRETH_REGLOAD(greth->regs->status) & mask) {
1008 GRETH_REGSAVE(greth->regs->control, ctrl);
1009 spin_unlock_irqrestore(&greth->devlock, flags);
1010 goto restart_txrx_poll;
1011 } else {
1012 napi_complete_done(napi, work_done);
1013 spin_unlock_irqrestore(&greth->devlock, flags);
1014 }
1015 }
1016
1017 return work_done;
1018}
1019
1020static int greth_set_mac_add(struct net_device *dev, void *p)
1021{
1022 struct sockaddr *addr = p;
1023 struct greth_private *greth;
1024 struct greth_regs *regs;
1025
1026 greth = netdev_priv(dev);
1027 regs = greth->regs;
1028
1029 if (!is_valid_ether_addr(addr->sa_data))
1030 return -EADDRNOTAVAIL;
1031
1032 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1033 GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]);
1034 GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 |
1035 dev->dev_addr[4] << 8 | dev->dev_addr[5]);
1036
1037 return 0;
1038}
1039
1040static u32 greth_hash_get_index(__u8 *addr)
1041{
1042 return (ether_crc(6, addr)) & 0x3F;
1043}
1044
1045static void greth_set_hash_filter(struct net_device *dev)
1046{
1047 struct netdev_hw_addr *ha;
1048 struct greth_private *greth = netdev_priv(dev);
1049 struct greth_regs *regs = greth->regs;
1050 u32 mc_filter[2];
1051 unsigned int bitnr;
1052
1053 mc_filter[0] = mc_filter[1] = 0;
1054
1055 netdev_for_each_mc_addr(ha, dev) {
1056 bitnr = greth_hash_get_index(ha->addr);
1057 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
1058 }
1059
1060 GRETH_REGSAVE(regs->hash_msb, mc_filter[1]);
1061 GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]);
1062}
1063
1064static void greth_set_multicast_list(struct net_device *dev)
1065{
1066 int cfg;
1067 struct greth_private *greth = netdev_priv(dev);
1068 struct greth_regs *regs = greth->regs;
1069
1070 cfg = GRETH_REGLOAD(regs->control);
1071 if (dev->flags & IFF_PROMISC)
1072 cfg |= GRETH_CTRL_PR;
1073 else
1074 cfg &= ~GRETH_CTRL_PR;
1075
1076 if (greth->multicast) {
1077 if (dev->flags & IFF_ALLMULTI) {
1078 GRETH_REGSAVE(regs->hash_msb, -1);
1079 GRETH_REGSAVE(regs->hash_lsb, -1);
1080 cfg |= GRETH_CTRL_MCEN;
1081 GRETH_REGSAVE(regs->control, cfg);
1082 return;
1083 }
1084
1085 if (netdev_mc_empty(dev)) {
1086 cfg &= ~GRETH_CTRL_MCEN;
1087 GRETH_REGSAVE(regs->control, cfg);
1088 return;
1089 }
1090
1091
1092 greth_set_hash_filter(dev);
1093 cfg |= GRETH_CTRL_MCEN;
1094 }
1095 GRETH_REGSAVE(regs->control, cfg);
1096}
1097
1098static u32 greth_get_msglevel(struct net_device *dev)
1099{
1100 struct greth_private *greth = netdev_priv(dev);
1101 return greth->msg_enable;
1102}
1103
1104static void greth_set_msglevel(struct net_device *dev, u32 value)
1105{
1106 struct greth_private *greth = netdev_priv(dev);
1107 greth->msg_enable = value;
1108}
1109
1110static int greth_get_regs_len(struct net_device *dev)
1111{
1112 return sizeof(struct greth_regs);
1113}
1114
1115static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1116{
1117 struct greth_private *greth = netdev_priv(dev);
1118
1119 strlcpy(info->driver, dev_driver_string(greth->dev),
1120 sizeof(info->driver));
1121 strlcpy(info->version, "revision: 1.0", sizeof(info->version));
1122 strlcpy(info->bus_info, greth->dev->bus->name, sizeof(info->bus_info));
1123 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1124}
1125
1126static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
1127{
1128 int i;
1129 struct greth_private *greth = netdev_priv(dev);
1130 u32 __iomem *greth_regs = (u32 __iomem *) greth->regs;
1131 u32 *buff = p;
1132
1133 for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++)
1134 buff[i] = greth_read_bd(&greth_regs[i]);
1135}
1136
1137static const struct ethtool_ops greth_ethtool_ops = {
1138 .get_msglevel = greth_get_msglevel,
1139 .set_msglevel = greth_set_msglevel,
1140 .get_drvinfo = greth_get_drvinfo,
1141 .get_regs_len = greth_get_regs_len,
1142 .get_regs = greth_get_regs,
1143 .get_link = ethtool_op_get_link,
1144 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1145 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1146};
1147
1148static struct net_device_ops greth_netdev_ops = {
1149 .ndo_open = greth_open,
1150 .ndo_stop = greth_close,
1151 .ndo_start_xmit = greth_start_xmit,
1152 .ndo_set_mac_address = greth_set_mac_add,
1153 .ndo_validate_addr = eth_validate_addr,
1154};
1155
1156static inline int wait_for_mdio(struct greth_private *greth)
1157{
1158 unsigned long timeout = jiffies + 4*HZ/100;
1159 while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) {
1160 if (time_after(jiffies, timeout))
1161 return 0;
1162 }
1163 return 1;
1164}
1165
1166static int greth_mdio_read(struct mii_bus *bus, int phy, int reg)
1167{
1168 struct greth_private *greth = bus->priv;
1169 int data;
1170
1171 if (!wait_for_mdio(greth))
1172 return -EBUSY;
1173
1174 GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2);
1175
1176 if (!wait_for_mdio(greth))
1177 return -EBUSY;
1178
1179 if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) {
1180 data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF;
1181 return data;
1182
1183 } else {
1184 return -1;
1185 }
1186}
1187
1188static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
1189{
1190 struct greth_private *greth = bus->priv;
1191
1192 if (!wait_for_mdio(greth))
1193 return -EBUSY;
1194
1195 GRETH_REGSAVE(greth->regs->mdio,
1196 ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1);
1197
1198 if (!wait_for_mdio(greth))
1199 return -EBUSY;
1200
1201 return 0;
1202}
1203
1204static void greth_link_change(struct net_device *dev)
1205{
1206 struct greth_private *greth = netdev_priv(dev);
1207 struct phy_device *phydev = dev->phydev;
1208 unsigned long flags;
1209 int status_change = 0;
1210 u32 ctrl;
1211
1212 spin_lock_irqsave(&greth->devlock, flags);
1213
1214 if (phydev->link) {
1215
1216 if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) {
1217 ctrl = GRETH_REGLOAD(greth->regs->control) &
1218 ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB);
1219
1220 if (phydev->duplex)
1221 ctrl |= GRETH_CTRL_FD;
1222
1223 if (phydev->speed == SPEED_100)
1224 ctrl |= GRETH_CTRL_SP;
1225 else if (phydev->speed == SPEED_1000)
1226 ctrl |= GRETH_CTRL_GB;
1227
1228 GRETH_REGSAVE(greth->regs->control, ctrl);
1229 greth->speed = phydev->speed;
1230 greth->duplex = phydev->duplex;
1231 status_change = 1;
1232 }
1233 }
1234
1235 if (phydev->link != greth->link) {
1236 if (!phydev->link) {
1237 greth->speed = 0;
1238 greth->duplex = -1;
1239 }
1240 greth->link = phydev->link;
1241
1242 status_change = 1;
1243 }
1244
1245 spin_unlock_irqrestore(&greth->devlock, flags);
1246
1247 if (status_change) {
1248 if (phydev->link)
1249 pr_debug("%s: link up (%d/%s)\n",
1250 dev->name, phydev->speed,
1251 DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
1252 else
1253 pr_debug("%s: link down\n", dev->name);
1254 }
1255}
1256
1257static int greth_mdio_probe(struct net_device *dev)
1258{
1259 struct greth_private *greth = netdev_priv(dev);
1260 struct phy_device *phy = NULL;
1261 int ret;
1262
1263
1264 phy = phy_find_first(greth->mdio);
1265
1266 if (!phy) {
1267 if (netif_msg_probe(greth))
1268 dev_err(&dev->dev, "no PHY found\n");
1269 return -ENXIO;
1270 }
1271
1272 ret = phy_connect_direct(dev, phy, &greth_link_change,
1273 greth->gbit_mac ? PHY_INTERFACE_MODE_GMII : PHY_INTERFACE_MODE_MII);
1274 if (ret) {
1275 if (netif_msg_ifup(greth))
1276 dev_err(&dev->dev, "could not attach to PHY\n");
1277 return ret;
1278 }
1279
1280 if (greth->gbit_mac)
1281 phy_set_max_speed(phy, SPEED_1000);
1282 else
1283 phy_set_max_speed(phy, SPEED_100);
1284
1285 linkmode_copy(phy->advertising, phy->supported);
1286
1287 greth->link = 0;
1288 greth->speed = 0;
1289 greth->duplex = -1;
1290
1291 return 0;
1292}
1293
1294static int greth_mdio_init(struct greth_private *greth)
1295{
1296 int ret;
1297 unsigned long timeout;
1298 struct net_device *ndev = greth->netdev;
1299
1300 greth->mdio = mdiobus_alloc();
1301 if (!greth->mdio) {
1302 return -ENOMEM;
1303 }
1304
1305 greth->mdio->name = "greth-mdio";
1306 snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq);
1307 greth->mdio->read = greth_mdio_read;
1308 greth->mdio->write = greth_mdio_write;
1309 greth->mdio->priv = greth;
1310
1311 ret = mdiobus_register(greth->mdio);
1312 if (ret) {
1313 goto error;
1314 }
1315
1316 ret = greth_mdio_probe(greth->netdev);
1317 if (ret) {
1318 if (netif_msg_probe(greth))
1319 dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n");
1320 goto unreg_mdio;
1321 }
1322
1323 phy_start(ndev->phydev);
1324
1325
1326 if (greth->edcl && greth_edcl == 1) {
1327 phy_start_aneg(ndev->phydev);
1328 timeout = jiffies + 6*HZ;
1329 while (!phy_aneg_done(ndev->phydev) &&
1330 time_before(jiffies, timeout)) {
1331 }
1332 phy_read_status(ndev->phydev);
1333 greth_link_change(greth->netdev);
1334 }
1335
1336 return 0;
1337
1338unreg_mdio:
1339 mdiobus_unregister(greth->mdio);
1340error:
1341 mdiobus_free(greth->mdio);
1342 return ret;
1343}
1344
1345
1346static int greth_of_probe(struct platform_device *ofdev)
1347{
1348 struct net_device *dev;
1349 struct greth_private *greth;
1350 struct greth_regs *regs;
1351
1352 int i;
1353 int err;
1354 int tmp;
1355 unsigned long timeout;
1356
1357 dev = alloc_etherdev(sizeof(struct greth_private));
1358
1359 if (dev == NULL)
1360 return -ENOMEM;
1361
1362 greth = netdev_priv(dev);
1363 greth->netdev = dev;
1364 greth->dev = &ofdev->dev;
1365
1366 if (greth_debug > 0)
1367 greth->msg_enable = greth_debug;
1368 else
1369 greth->msg_enable = GRETH_DEF_MSG_ENABLE;
1370
1371 spin_lock_init(&greth->devlock);
1372
1373 greth->regs = of_ioremap(&ofdev->resource[0], 0,
1374 resource_size(&ofdev->resource[0]),
1375 "grlib-greth regs");
1376
1377 if (greth->regs == NULL) {
1378 if (netif_msg_probe(greth))
1379 dev_err(greth->dev, "ioremap failure.\n");
1380 err = -EIO;
1381 goto error1;
1382 }
1383
1384 regs = greth->regs;
1385 greth->irq = ofdev->archdata.irqs[0];
1386
1387 dev_set_drvdata(greth->dev, dev);
1388 SET_NETDEV_DEV(dev, greth->dev);
1389
1390 if (netif_msg_probe(greth))
1391 dev_dbg(greth->dev, "resetting controller.\n");
1392
1393
1394 GRETH_REGSAVE(regs->control, GRETH_RESET);
1395
1396
1397 timeout = jiffies + HZ/100;
1398 while (GRETH_REGLOAD(regs->control) & GRETH_RESET) {
1399 if (time_after(jiffies, timeout)) {
1400 err = -EIO;
1401 if (netif_msg_probe(greth))
1402 dev_err(greth->dev, "timeout when waiting for reset.\n");
1403 goto error2;
1404 }
1405 }
1406
1407
1408 greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F;
1409
1410
1411 tmp = GRETH_REGLOAD(regs->control);
1412 greth->gbit_mac = (tmp >> 27) & 1;
1413
1414
1415 greth->multicast = (tmp >> 25) & 1;
1416
1417 greth->edcl = (tmp >> 31) & 1;
1418
1419
1420
1421 if (greth->edcl != 0)
1422 GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX);
1423
1424
1425 greth->mdio_int_en = (tmp >> 26) & 1;
1426
1427 err = greth_mdio_init(greth);
1428 if (err) {
1429 if (netif_msg_probe(greth))
1430 dev_err(greth->dev, "failed to register MDIO bus\n");
1431 goto error2;
1432 }
1433
1434
1435 greth->tx_bd_base = dma_zalloc_coherent(greth->dev, 1024,
1436 &greth->tx_bd_base_phys,
1437 GFP_KERNEL);
1438 if (!greth->tx_bd_base) {
1439 err = -ENOMEM;
1440 goto error3;
1441 }
1442
1443
1444 greth->rx_bd_base = dma_zalloc_coherent(greth->dev, 1024,
1445 &greth->rx_bd_base_phys,
1446 GFP_KERNEL);
1447 if (!greth->rx_bd_base) {
1448 err = -ENOMEM;
1449 goto error4;
1450 }
1451
1452
1453 for (i = 0; i < 6; i++) {
1454 if (macaddr[i] != 0)
1455 break;
1456 }
1457 if (i == 6) {
1458 u8 addr[ETH_ALEN];
1459
1460 err = of_get_mac_address(ofdev->dev.of_node, addr);
1461 if (!err) {
1462 for (i = 0; i < 6; i++)
1463 macaddr[i] = (unsigned int) addr[i];
1464 } else {
1465#ifdef CONFIG_SPARC
1466 for (i = 0; i < 6; i++)
1467 macaddr[i] = (unsigned int) idprom->id_ethaddr[i];
1468#endif
1469 }
1470 }
1471
1472 for (i = 0; i < 6; i++)
1473 dev->dev_addr[i] = macaddr[i];
1474
1475 macaddr[5]++;
1476
1477 if (!is_valid_ether_addr(&dev->dev_addr[0])) {
1478 if (netif_msg_probe(greth))
1479 dev_err(greth->dev, "no valid ethernet address, aborting.\n");
1480 err = -EINVAL;
1481 goto error5;
1482 }
1483
1484 GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]);
1485 GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 |
1486 dev->dev_addr[4] << 8 | dev->dev_addr[5]);
1487
1488
1489 GRETH_REGSAVE(regs->status, 0xFF);
1490
1491 if (greth->gbit_mac) {
1492 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
1493 NETIF_F_RXCSUM;
1494 dev->features = dev->hw_features | NETIF_F_HIGHDMA;
1495 greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit;
1496 }
1497
1498 if (greth->multicast) {
1499 greth_netdev_ops.ndo_set_rx_mode = greth_set_multicast_list;
1500 dev->flags |= IFF_MULTICAST;
1501 } else {
1502 dev->flags &= ~IFF_MULTICAST;
1503 }
1504
1505 dev->netdev_ops = &greth_netdev_ops;
1506 dev->ethtool_ops = &greth_ethtool_ops;
1507
1508 err = register_netdev(dev);
1509 if (err) {
1510 if (netif_msg_probe(greth))
1511 dev_err(greth->dev, "netdevice registration failed.\n");
1512 goto error5;
1513 }
1514
1515
1516 netif_napi_add(dev, &greth->napi, greth_poll, 64);
1517
1518 return 0;
1519
1520error5:
1521 dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys);
1522error4:
1523 dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys);
1524error3:
1525 mdiobus_unregister(greth->mdio);
1526error2:
1527 of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0]));
1528error1:
1529 free_netdev(dev);
1530 return err;
1531}
1532
1533static int greth_of_remove(struct platform_device *of_dev)
1534{
1535 struct net_device *ndev = platform_get_drvdata(of_dev);
1536 struct greth_private *greth = netdev_priv(ndev);
1537
1538
1539 dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys);
1540
1541 dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys);
1542
1543 if (ndev->phydev)
1544 phy_stop(ndev->phydev);
1545 mdiobus_unregister(greth->mdio);
1546
1547 unregister_netdev(ndev);
1548 free_netdev(ndev);
1549
1550 of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0]));
1551
1552 return 0;
1553}
1554
1555static const struct of_device_id greth_of_match[] = {
1556 {
1557 .name = "GAISLER_ETHMAC",
1558 },
1559 {
1560 .name = "01_01d",
1561 },
1562 {},
1563};
1564
1565MODULE_DEVICE_TABLE(of, greth_of_match);
1566
1567static struct platform_driver greth_of_driver = {
1568 .driver = {
1569 .name = "grlib-greth",
1570 .of_match_table = greth_of_match,
1571 },
1572 .probe = greth_of_probe,
1573 .remove = greth_of_remove,
1574};
1575
1576module_platform_driver(greth_of_driver);
1577
1578MODULE_AUTHOR("Aeroflex Gaisler AB.");
1579MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver");
1580MODULE_LICENSE("GPL");
1581
