1 /*
2 * Atmel MACB Ethernet Controller driver
3 *
4 * Copyright (C) 2004-2006 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/clk.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/init.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/platform_device.h>
22 #include <linux/phy.h>
23
24 #include <mach/board.h>
25 #include <mach/cpu.h>
26
27 #include "macb.h"
28
29 #define RX_BUFFER_SIZE 128
30 #define RX_RING_SIZE 512
31 #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE)
32
33 /* Make the IP header word-aligned (the ethernet header is 14 bytes) */
34 #define RX_OFFSET 2
35
36 #define TX_RING_SIZE 128
37 #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1)
38 #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE)
39
40 #define TX_RING_GAP(bp) \
41 (TX_RING_SIZE - (bp)->tx_pending)
42 #define TX_BUFFS_AVAIL(bp) \
43 (((bp)->tx_tail <= (bp)->tx_head) ? \
44 (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \
45 (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp))
46 #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1))
47
48 #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1))
49
50 /* minimum number of free TX descriptors before waking up TX process */
51 #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4)
52
53 #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \
54 | MACB_BIT(ISR_ROVR))
55
__macb_set_hwaddr(struct macb * bp)56 static void __macb_set_hwaddr(struct macb *bp)
57 {
58 u32 bottom;
59 u16 top;
60
61 bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
62 macb_writel(bp, SA1B, bottom);
63 top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
64 macb_writel(bp, SA1T, top);
65 }
66
macb_get_hwaddr(struct macb * bp)67 static void __init macb_get_hwaddr(struct macb *bp)
68 {
69 u32 bottom;
70 u16 top;
71 u8 addr[6];
72
73 bottom = macb_readl(bp, SA1B);
74 top = macb_readl(bp, SA1T);
75
76 addr[0] = bottom & 0xff;
77 addr[1] = (bottom >> 8) & 0xff;
78 addr[2] = (bottom >> 16) & 0xff;
79 addr[3] = (bottom >> 24) & 0xff;
80 addr[4] = top & 0xff;
81 addr[5] = (top >> 8) & 0xff;
82
83 if (is_valid_ether_addr(addr)) {
84 memcpy(bp->dev->dev_addr, addr, sizeof(addr));
85 } else {
86 dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
87 random_ether_addr(bp->dev->dev_addr);
88 }
89 }
90
macb_mdio_read(struct mii_bus * bus,int mii_id,int regnum)91 static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
92 {
93 struct macb *bp = bus->priv;
94 int value;
95
96 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
97 | MACB_BF(RW, MACB_MAN_READ)
98 | MACB_BF(PHYA, mii_id)
99 | MACB_BF(REGA, regnum)
100 | MACB_BF(CODE, MACB_MAN_CODE)));
101
102 /* wait for end of transfer */
103 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
104 cpu_relax();
105
106 value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
107
108 return value;
109 }
110
macb_mdio_write(struct mii_bus * bus,int mii_id,int regnum,u16 value)111 static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
112 u16 value)
113 {
114 struct macb *bp = bus->priv;
115
116 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
117 | MACB_BF(RW, MACB_MAN_WRITE)
118 | MACB_BF(PHYA, mii_id)
119 | MACB_BF(REGA, regnum)
120 | MACB_BF(CODE, MACB_MAN_CODE)
121 | MACB_BF(DATA, value)));
122
123 /* wait for end of transfer */
124 while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
125 cpu_relax();
126
127 return 0;
128 }
129
macb_mdio_reset(struct mii_bus * bus)130 static int macb_mdio_reset(struct mii_bus *bus)
131 {
132 return 0;
133 }
134
macb_handle_link_change(struct net_device * dev)135 static void macb_handle_link_change(struct net_device *dev)
136 {
137 struct macb *bp = netdev_priv(dev);
138 struct phy_device *phydev = bp->phy_dev;
139 unsigned long flags;
140
141 int status_change = 0;
142
143 spin_lock_irqsave(&bp->lock, flags);
144
145 if (phydev->link) {
146 if ((bp->speed != phydev->speed) ||
147 (bp->duplex != phydev->duplex)) {
148 u32 reg;
149
150 reg = macb_readl(bp, NCFGR);
151 reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
152
153 if (phydev->duplex)
154 reg |= MACB_BIT(FD);
155 if (phydev->speed == SPEED_100)
156 reg |= MACB_BIT(SPD);
157
158 macb_writel(bp, NCFGR, reg);
159
160 bp->speed = phydev->speed;
161 bp->duplex = phydev->duplex;
162 status_change = 1;
163 }
164 }
165
166 if (phydev->link != bp->link) {
167 if (!phydev->link) {
168 bp->speed = 0;
169 bp->duplex = -1;
170 }
171 bp->link = phydev->link;
172
173 status_change = 1;
174 }
175
176 spin_unlock_irqrestore(&bp->lock, flags);
177
178 if (status_change) {
179 if (phydev->link)
180 printk(KERN_INFO "%s: link up (%d/%s)\n",
181 dev->name, phydev->speed,
182 DUPLEX_FULL == phydev->duplex ? "Full":"Half");
183 else
184 printk(KERN_INFO "%s: link down\n", dev->name);
185 }
186 }
187
188 /* based on au1000_eth. c*/
macb_mii_probe(struct net_device * dev)189 static int macb_mii_probe(struct net_device *dev)
190 {
191 struct macb *bp = netdev_priv(dev);
192 struct phy_device *phydev = NULL;
193 struct eth_platform_data *pdata;
194 int phy_addr;
195
196 /* find the first phy */
197 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
198 if (bp->mii_bus->phy_map[phy_addr]) {
199 phydev = bp->mii_bus->phy_map[phy_addr];
200 break;
201 }
202 }
203
204 if (!phydev) {
205 printk (KERN_ERR "%s: no PHY found\n", dev->name);
206 return -1;
207 }
208
209 pdata = bp->pdev->dev.platform_data;
210 /* TODO : add pin_irq */
211
212 /* attach the mac to the phy */
213 if (pdata && pdata->is_rmii) {
214 phydev = phy_connect(dev, phydev->dev.bus_id,
215 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_RMII);
216 } else {
217 phydev = phy_connect(dev, phydev->dev.bus_id,
218 &macb_handle_link_change, 0, PHY_INTERFACE_MODE_MII);
219 }
220
221 if (IS_ERR(phydev)) {
222 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
223 return PTR_ERR(phydev);
224 }
225
226 /* mask with MAC supported features */
227 phydev->supported &= PHY_BASIC_FEATURES;
228
229 phydev->advertising = phydev->supported;
230
231 bp->link = 0;
232 bp->speed = 0;
233 bp->duplex = -1;
234 bp->phy_dev = phydev;
235
236 return 0;
237 }
238
macb_mii_init(struct macb * bp)239 static int macb_mii_init(struct macb *bp)
240 {
241 struct eth_platform_data *pdata;
242 int err = -ENXIO, i;
243
244 /* Enable managment port */
245 macb_writel(bp, NCR, MACB_BIT(MPE));
246
247 bp->mii_bus = mdiobus_alloc();
248 if (bp->mii_bus == NULL) {
249 err = -ENOMEM;
250 goto err_out;
251 }
252
253 bp->mii_bus->name = "MACB_mii_bus";
254 bp->mii_bus->read = &macb_mdio_read;
255 bp->mii_bus->write = &macb_mdio_write;
256 bp->mii_bus->reset = &macb_mdio_reset;
257 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
258 bp->mii_bus->priv = bp;
259 bp->mii_bus->parent = &bp->dev->dev;
260 pdata = bp->pdev->dev.platform_data;
261
262 if (pdata)
263 bp->mii_bus->phy_mask = pdata->phy_mask;
264
265 bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
266 if (!bp->mii_bus->irq) {
267 err = -ENOMEM;
268 goto err_out_free_mdiobus;
269 }
270
271 for (i = 0; i < PHY_MAX_ADDR; i++)
272 bp->mii_bus->irq[i] = PHY_POLL;
273
274 platform_set_drvdata(bp->dev, bp->mii_bus);
275
276 if (mdiobus_register(bp->mii_bus))
277 goto err_out_free_mdio_irq;
278
279 if (macb_mii_probe(bp->dev) != 0) {
280 goto err_out_unregister_bus;
281 }
282
283 return 0;
284
285 err_out_unregister_bus:
286 mdiobus_unregister(bp->mii_bus);
287 err_out_free_mdio_irq:
288 kfree(bp->mii_bus->irq);
289 err_out_free_mdiobus:
290 mdiobus_free(bp->mii_bus);
291 err_out:
292 return err;
293 }
294
macb_update_stats(struct macb * bp)295 static void macb_update_stats(struct macb *bp)
296 {
297 u32 __iomem *reg = bp->regs + MACB_PFR;
298 u32 *p = &bp->hw_stats.rx_pause_frames;
299 u32 *end = &bp->hw_stats.tx_pause_frames + 1;
300
301 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
302
303 for(; p < end; p++, reg++)
304 *p += __raw_readl(reg);
305 }
306
macb_tx(struct macb * bp)307 static void macb_tx(struct macb *bp)
308 {
309 unsigned int tail;
310 unsigned int head;
311 u32 status;
312
313 status = macb_readl(bp, TSR);
314 macb_writel(bp, TSR, status);
315
316 dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n",
317 (unsigned long)status);
318
319 if (status & MACB_BIT(UND)) {
320 int i;
321 printk(KERN_ERR "%s: TX underrun, resetting buffers\n",
322 bp->dev->name);
323
324 /* Transfer ongoing, disable transmitter, to avoid confusion */
325 if (status & MACB_BIT(TGO))
326 macb_writel(bp, NCR, macb_readl(bp, NCR) & ~MACB_BIT(TE));
327
328 head = bp->tx_head;
329
330 /*Mark all the buffer as used to avoid sending a lost buffer*/
331 for (i = 0; i < TX_RING_SIZE; i++)
332 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
333
334 /* free transmit buffer in upper layer*/
335 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
336 struct ring_info *rp = &bp->tx_skb[tail];
337 struct sk_buff *skb = rp->skb;
338
339 BUG_ON(skb == NULL);
340
341 rmb();
342
343 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
344 DMA_TO_DEVICE);
345 rp->skb = NULL;
346 dev_kfree_skb_irq(skb);
347 }
348
349 bp->tx_head = bp->tx_tail = 0;
350
351 /* Enable the transmitter again */
352 if (status & MACB_BIT(TGO))
353 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TE));
354 }
355
356 if (!(status & MACB_BIT(COMP)))
357 /*
358 * This may happen when a buffer becomes complete
359 * between reading the ISR and scanning the
360 * descriptors. Nothing to worry about.
361 */
362 return;
363
364 head = bp->tx_head;
365 for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
366 struct ring_info *rp = &bp->tx_skb[tail];
367 struct sk_buff *skb = rp->skb;
368 u32 bufstat;
369
370 BUG_ON(skb == NULL);
371
372 rmb();
373 bufstat = bp->tx_ring[tail].ctrl;
374
375 if (!(bufstat & MACB_BIT(TX_USED)))
376 break;
377
378 dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n",
379 tail, skb->data);
380 dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
381 DMA_TO_DEVICE);
382 bp->stats.tx_packets++;
383 bp->stats.tx_bytes += skb->len;
384 rp->skb = NULL;
385 dev_kfree_skb_irq(skb);
386 }
387
388 bp->tx_tail = tail;
389 if (netif_queue_stopped(bp->dev) &&
390 TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH)
391 netif_wake_queue(bp->dev);
392 }
393
macb_rx_frame(struct macb * bp,unsigned int first_frag,unsigned int last_frag)394 static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
395 unsigned int last_frag)
396 {
397 unsigned int len;
398 unsigned int frag;
399 unsigned int offset = 0;
400 struct sk_buff *skb;
401
402 len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl);
403
404 dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n",
405 first_frag, last_frag, len);
406
407 skb = dev_alloc_skb(len + RX_OFFSET);
408 if (!skb) {
409 bp->stats.rx_dropped++;
410 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
411 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
412 if (frag == last_frag)
413 break;
414 }
415 wmb();
416 return 1;
417 }
418
419 skb_reserve(skb, RX_OFFSET);
420 skb->ip_summed = CHECKSUM_NONE;
421 skb_put(skb, len);
422
423 for (frag = first_frag; ; frag = NEXT_RX(frag)) {
424 unsigned int frag_len = RX_BUFFER_SIZE;
425
426 if (offset + frag_len > len) {
427 BUG_ON(frag != last_frag);
428 frag_len = len - offset;
429 }
430 skb_copy_to_linear_data_offset(skb, offset,
431 (bp->rx_buffers +
432 (RX_BUFFER_SIZE * frag)),
433 frag_len);
434 offset += RX_BUFFER_SIZE;
435 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
436 wmb();
437
438 if (frag == last_frag)
439 break;
440 }
441
442 skb->protocol = eth_type_trans(skb, bp->dev);
443
444 bp->stats.rx_packets++;
445 bp->stats.rx_bytes += len;
446 dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n",
447 skb->len, skb->csum);
448 netif_receive_skb(skb);
449
450 return 0;
451 }
452
453 /* Mark DMA descriptors from begin up to and not including end as unused */
discard_partial_frame(struct macb * bp,unsigned int begin,unsigned int end)454 static void discard_partial_frame(struct macb *bp, unsigned int begin,
455 unsigned int end)
456 {
457 unsigned int frag;
458
459 for (frag = begin; frag != end; frag = NEXT_RX(frag))
460 bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
461 wmb();
462
463 /*
464 * When this happens, the hardware stats registers for
465 * whatever caused this is updated, so we don't have to record
466 * anything.
467 */
468 }
469
macb_rx(struct macb * bp,int budget)470 static int macb_rx(struct macb *bp, int budget)
471 {
472 int received = 0;
473 unsigned int tail = bp->rx_tail;
474 int first_frag = -1;
475
476 for (; budget > 0; tail = NEXT_RX(tail)) {
477 u32 addr, ctrl;
478
479 rmb();
480 addr = bp->rx_ring[tail].addr;
481 ctrl = bp->rx_ring[tail].ctrl;
482
483 if (!(addr & MACB_BIT(RX_USED)))
484 break;
485
486 if (ctrl & MACB_BIT(RX_SOF)) {
487 if (first_frag != -1)
488 discard_partial_frame(bp, first_frag, tail);
489 first_frag = tail;
490 }
491
492 if (ctrl & MACB_BIT(RX_EOF)) {
493 int dropped;
494 BUG_ON(first_frag == -1);
495
496 dropped = macb_rx_frame(bp, first_frag, tail);
497 first_frag = -1;
498 if (!dropped) {
499 received++;
500 budget--;
501 }
502 }
503 }
504
505 if (first_frag != -1)
506 bp->rx_tail = first_frag;
507 else
508 bp->rx_tail = tail;
509
510 return received;
511 }
512
macb_poll(struct napi_struct * napi,int budget)513 static int macb_poll(struct napi_struct *napi, int budget)
514 {
515 struct macb *bp = container_of(napi, struct macb, napi);
516 struct net_device *dev = bp->dev;
517 int work_done;
518 u32 status;
519
520 status = macb_readl(bp, RSR);
521 macb_writel(bp, RSR, status);
522
523 work_done = 0;
524 if (!status) {
525 /*
526 * This may happen if an interrupt was pending before
527 * this function was called last time, and no packets
528 * have been received since.
529 */
530 netif_rx_complete(napi);
531 goto out;
532 }
533
534 dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
535 (unsigned long)status, budget);
536
537 if (!(status & MACB_BIT(REC))) {
538 dev_warn(&bp->pdev->dev,
539 "No RX buffers complete, status = %02lx\n",
540 (unsigned long)status);
541 netif_rx_complete(napi);
542 goto out;
543 }
544
545 work_done = macb_rx(bp, budget);
546 if (work_done < budget)
547 netif_rx_complete(napi);
548
549 /*
550 * We've done what we can to clean the buffers. Make sure we
551 * get notified when new packets arrive.
552 */
553 out:
554 macb_writel(bp, IER, MACB_RX_INT_FLAGS);
555
556 /* TODO: Handle errors */
557
558 return work_done;
559 }
560
macb_interrupt(int irq,void * dev_id)561 static irqreturn_t macb_interrupt(int irq, void *dev_id)
562 {
563 struct net_device *dev = dev_id;
564 struct macb *bp = netdev_priv(dev);
565 u32 status;
566
567 status = macb_readl(bp, ISR);
568
569 if (unlikely(!status))
570 return IRQ_NONE;
571
572 spin_lock(&bp->lock);
573
574 while (status) {
575 /* close possible race with dev_close */
576 if (unlikely(!netif_running(dev))) {
577 macb_writel(bp, IDR, ~0UL);
578 break;
579 }
580
581 if (status & MACB_RX_INT_FLAGS) {
582 if (netif_rx_schedule_prep(&bp->napi)) {
583 /*
584 * There's no point taking any more interrupts
585 * until we have processed the buffers
586 */
587 macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
588 dev_dbg(&bp->pdev->dev,
589 "scheduling RX softirq\n");
590 __netif_rx_schedule(&bp->napi);
591 }
592 }
593
594 if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND)))
595 macb_tx(bp);
596
597 /*
598 * Link change detection isn't possible with RMII, so we'll
599 * add that if/when we get our hands on a full-blown MII PHY.
600 */
601
602 if (status & MACB_BIT(HRESP)) {
603 /*
604 * TODO: Reset the hardware, and maybe move the printk
605 * to a lower-priority context as well (work queue?)
606 */
607 printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n",
608 dev->name);
609 }
610
611 status = macb_readl(bp, ISR);
612 }
613
614 spin_unlock(&bp->lock);
615
616 return IRQ_HANDLED;
617 }
618
macb_start_xmit(struct sk_buff * skb,struct net_device * dev)619 static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
620 {
621 struct macb *bp = netdev_priv(dev);
622 dma_addr_t mapping;
623 unsigned int len, entry;
624 u32 ctrl;
625
626 #ifdef DEBUG
627 int i;
628 dev_dbg(&bp->pdev->dev,
629 "start_xmit: len %u head %p data %p tail %p end %p\n",
630 skb->len, skb->head, skb->data,
631 skb_tail_pointer(skb), skb_end_pointer(skb));
632 dev_dbg(&bp->pdev->dev,
633 "data:");
634 for (i = 0; i < 16; i++)
635 printk(" %02x", (unsigned int)skb->data[i]);
636 printk("\n");
637 #endif
638
639 len = skb->len;
640 spin_lock_irq(&bp->lock);
641
642 /* This is a hard error, log it. */
643 if (TX_BUFFS_AVAIL(bp) < 1) {
644 netif_stop_queue(dev);
645 spin_unlock_irq(&bp->lock);
646 dev_err(&bp->pdev->dev,
647 "BUG! Tx Ring full when queue awake!\n");
648 dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n",
649 bp->tx_head, bp->tx_tail);
650 return 1;
651 }
652
653 entry = bp->tx_head;
654 dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry);
655 mapping = dma_map_single(&bp->pdev->dev, skb->data,
656 len, DMA_TO_DEVICE);
657 bp->tx_skb[entry].skb = skb;
658 bp->tx_skb[entry].mapping = mapping;
659 dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n",
660 skb->data, (unsigned long)mapping);
661
662 ctrl = MACB_BF(TX_FRMLEN, len);
663 ctrl |= MACB_BIT(TX_LAST);
664 if (entry == (TX_RING_SIZE - 1))
665 ctrl |= MACB_BIT(TX_WRAP);
666
667 bp->tx_ring[entry].addr = mapping;
668 bp->tx_ring[entry].ctrl = ctrl;
669 wmb();
670
671 entry = NEXT_TX(entry);
672 bp->tx_head = entry;
673
674 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
675
676 if (TX_BUFFS_AVAIL(bp) < 1)
677 netif_stop_queue(dev);
678
679 spin_unlock_irq(&bp->lock);
680
681 dev->trans_start = jiffies;
682
683 return 0;
684 }
685
macb_free_consistent(struct macb * bp)686 static void macb_free_consistent(struct macb *bp)
687 {
688 if (bp->tx_skb) {
689 kfree(bp->tx_skb);
690 bp->tx_skb = NULL;
691 }
692 if (bp->rx_ring) {
693 dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES,
694 bp->rx_ring, bp->rx_ring_dma);
695 bp->rx_ring = NULL;
696 }
697 if (bp->tx_ring) {
698 dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES,
699 bp->tx_ring, bp->tx_ring_dma);
700 bp->tx_ring = NULL;
701 }
702 if (bp->rx_buffers) {
703 dma_free_coherent(&bp->pdev->dev,
704 RX_RING_SIZE * RX_BUFFER_SIZE,
705 bp->rx_buffers, bp->rx_buffers_dma);
706 bp->rx_buffers = NULL;
707 }
708 }
709
macb_alloc_consistent(struct macb * bp)710 static int macb_alloc_consistent(struct macb *bp)
711 {
712 int size;
713
714 size = TX_RING_SIZE * sizeof(struct ring_info);
715 bp->tx_skb = kmalloc(size, GFP_KERNEL);
716 if (!bp->tx_skb)
717 goto out_err;
718
719 size = RX_RING_BYTES;
720 bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
721 &bp->rx_ring_dma, GFP_KERNEL);
722 if (!bp->rx_ring)
723 goto out_err;
724 dev_dbg(&bp->pdev->dev,
725 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
726 size, (unsigned long)bp->rx_ring_dma, bp->rx_ring);
727
728 size = TX_RING_BYTES;
729 bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
730 &bp->tx_ring_dma, GFP_KERNEL);
731 if (!bp->tx_ring)
732 goto out_err;
733 dev_dbg(&bp->pdev->dev,
734 "Allocated TX ring of %d bytes at %08lx (mapped %p)\n",
735 size, (unsigned long)bp->tx_ring_dma, bp->tx_ring);
736
737 size = RX_RING_SIZE * RX_BUFFER_SIZE;
738 bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
739 &bp->rx_buffers_dma, GFP_KERNEL);
740 if (!bp->rx_buffers)
741 goto out_err;
742 dev_dbg(&bp->pdev->dev,
743 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
744 size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers);
745
746 return 0;
747
748 out_err:
749 macb_free_consistent(bp);
750 return -ENOMEM;
751 }
752
macb_init_rings(struct macb * bp)753 static void macb_init_rings(struct macb *bp)
754 {
755 int i;
756 dma_addr_t addr;
757
758 addr = bp->rx_buffers_dma;
759 for (i = 0; i < RX_RING_SIZE; i++) {
760 bp->rx_ring[i].addr = addr;
761 bp->rx_ring[i].ctrl = 0;
762 addr += RX_BUFFER_SIZE;
763 }
764 bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP);
765
766 for (i = 0; i < TX_RING_SIZE; i++) {
767 bp->tx_ring[i].addr = 0;
768 bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
769 }
770 bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
771
772 bp->rx_tail = bp->tx_head = bp->tx_tail = 0;
773 }
774
macb_reset_hw(struct macb * bp)775 static void macb_reset_hw(struct macb *bp)
776 {
777 /* Make sure we have the write buffer for ourselves */
778 wmb();
779
780 /*
781 * Disable RX and TX (XXX: Should we halt the transmission
782 * more gracefully?)
783 */
784 macb_writel(bp, NCR, 0);
785
786 /* Clear the stats registers (XXX: Update stats first?) */
787 macb_writel(bp, NCR, MACB_BIT(CLRSTAT));
788
789 /* Clear all status flags */
790 macb_writel(bp, TSR, ~0UL);
791 macb_writel(bp, RSR, ~0UL);
792
793 /* Disable all interrupts */
794 macb_writel(bp, IDR, ~0UL);
795 macb_readl(bp, ISR);
796 }
797
macb_init_hw(struct macb * bp)798 static void macb_init_hw(struct macb *bp)
799 {
800 u32 config;
801
802 macb_reset_hw(bp);
803 __macb_set_hwaddr(bp);
804
805 config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
806 config |= MACB_BIT(PAE); /* PAuse Enable */
807 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
808 if (bp->dev->flags & IFF_PROMISC)
809 config |= MACB_BIT(CAF); /* Copy All Frames */
810 if (!(bp->dev->flags & IFF_BROADCAST))
811 config |= MACB_BIT(NBC); /* No BroadCast */
812 macb_writel(bp, NCFGR, config);
813
814 /* Initialize TX and RX buffers */
815 macb_writel(bp, RBQP, bp->rx_ring_dma);
816 macb_writel(bp, TBQP, bp->tx_ring_dma);
817
818 /* Enable TX and RX */
819 macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE));
820
821 /* Enable interrupts */
822 macb_writel(bp, IER, (MACB_BIT(RCOMP)
823 | MACB_BIT(RXUBR)
824 | MACB_BIT(ISR_TUND)
825 | MACB_BIT(ISR_RLE)
826 | MACB_BIT(TXERR)
827 | MACB_BIT(TCOMP)
828 | MACB_BIT(ISR_ROVR)
829 | MACB_BIT(HRESP)));
830
831 }
832
833 /*
834 * The hash address register is 64 bits long and takes up two
835 * locations in the memory map. The least significant bits are stored
836 * in EMAC_HSL and the most significant bits in EMAC_HSH.
837 *
838 * The unicast hash enable and the multicast hash enable bits in the
839 * network configuration register enable the reception of hash matched
840 * frames. The destination address is reduced to a 6 bit index into
841 * the 64 bit hash register using the following hash function. The
842 * hash function is an exclusive or of every sixth bit of the
843 * destination address.
844 *
845 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
846 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
847 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
848 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
849 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
850 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
851 *
852 * da[0] represents the least significant bit of the first byte
853 * received, that is, the multicast/unicast indicator, and da[47]
854 * represents the most significant bit of the last byte received. If
855 * the hash index, hi[n], points to a bit that is set in the hash
856 * register then the frame will be matched according to whether the
857 * frame is multicast or unicast. A multicast match will be signalled
858 * if the multicast hash enable bit is set, da[0] is 1 and the hash
859 * index points to a bit set in the hash register. A unicast match
860 * will be signalled if the unicast hash enable bit is set, da[0] is 0
861 * and the hash index points to a bit set in the hash register. To
862 * receive all multicast frames, the hash register should be set with
863 * all ones and the multicast hash enable bit should be set in the
864 * network configuration register.
865 */
866
hash_bit_value(int bitnr,__u8 * addr)867 static inline int hash_bit_value(int bitnr, __u8 *addr)
868 {
869 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
870 return 1;
871 return 0;
872 }
873
874 /*
875 * Return the hash index value for the specified address.
876 */
hash_get_index(__u8 * addr)877 static int hash_get_index(__u8 *addr)
878 {
879 int i, j, bitval;
880 int hash_index = 0;
881
882 for (j = 0; j < 6; j++) {
883 for (i = 0, bitval = 0; i < 8; i++)
884 bitval ^= hash_bit_value(i*6 + j, addr);
885
886 hash_index |= (bitval << j);
887 }
888
889 return hash_index;
890 }
891
892 /*
893 * Add multicast addresses to the internal multicast-hash table.
894 */
macb_sethashtable(struct net_device * dev)895 static void macb_sethashtable(struct net_device *dev)
896 {
897 struct dev_mc_list *curr;
898 unsigned long mc_filter[2];
899 unsigned int i, bitnr;
900 struct macb *bp = netdev_priv(dev);
901
902 mc_filter[0] = mc_filter[1] = 0;
903
904 curr = dev->mc_list;
905 for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
906 if (!curr) break; /* unexpected end of list */
907
908 bitnr = hash_get_index(curr->dmi_addr);
909 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
910 }
911
912 macb_writel(bp, HRB, mc_filter[0]);
913 macb_writel(bp, HRT, mc_filter[1]);
914 }
915
916 /*
917 * Enable/Disable promiscuous and multicast modes.
918 */
macb_set_rx_mode(struct net_device * dev)919 static void macb_set_rx_mode(struct net_device *dev)
920 {
921 unsigned long cfg;
922 struct macb *bp = netdev_priv(dev);
923
924 cfg = macb_readl(bp, NCFGR);
925
926 if (dev->flags & IFF_PROMISC)
927 /* Enable promiscuous mode */
928 cfg |= MACB_BIT(CAF);
929 else if (dev->flags & (~IFF_PROMISC))
930 /* Disable promiscuous mode */
931 cfg &= ~MACB_BIT(CAF);
932
933 if (dev->flags & IFF_ALLMULTI) {
934 /* Enable all multicast mode */
935 macb_writel(bp, HRB, -1);
936 macb_writel(bp, HRT, -1);
937 cfg |= MACB_BIT(NCFGR_MTI);
938 } else if (dev->mc_count > 0) {
939 /* Enable specific multicasts */
940 macb_sethashtable(dev);
941 cfg |= MACB_BIT(NCFGR_MTI);
942 } else if (dev->flags & (~IFF_ALLMULTI)) {
943 /* Disable all multicast mode */
944 macb_writel(bp, HRB, 0);
945 macb_writel(bp, HRT, 0);
946 cfg &= ~MACB_BIT(NCFGR_MTI);
947 }
948
949 macb_writel(bp, NCFGR, cfg);
950 }
951
macb_open(struct net_device * dev)952 static int macb_open(struct net_device *dev)
953 {
954 struct macb *bp = netdev_priv(dev);
955 int err;
956
957 dev_dbg(&bp->pdev->dev, "open\n");
958
959 /* if the phy is not yet register, retry later*/
960 if (!bp->phy_dev)
961 return -EAGAIN;
962
963 if (!is_valid_ether_addr(dev->dev_addr))
964 return -EADDRNOTAVAIL;
965
966 err = macb_alloc_consistent(bp);
967 if (err) {
968 printk(KERN_ERR
969 "%s: Unable to allocate DMA memory (error %d)\n",
970 dev->name, err);
971 return err;
972 }
973
974 napi_enable(&bp->napi);
975
976 macb_init_rings(bp);
977 macb_init_hw(bp);
978
979 /* schedule a link state check */
980 phy_start(bp->phy_dev);
981
982 netif_start_queue(dev);
983
984 return 0;
985 }
986
macb_close(struct net_device * dev)987 static int macb_close(struct net_device *dev)
988 {
989 struct macb *bp = netdev_priv(dev);
990 unsigned long flags;
991
992 netif_stop_queue(dev);
993 napi_disable(&bp->napi);
994
995 if (bp->phy_dev)
996 phy_stop(bp->phy_dev);
997
998 spin_lock_irqsave(&bp->lock, flags);
999 macb_reset_hw(bp);
1000 netif_carrier_off(dev);
1001 spin_unlock_irqrestore(&bp->lock, flags);
1002
1003 macb_free_consistent(bp);
1004
1005 return 0;
1006 }
1007
macb_get_stats(struct net_device * dev)1008 static struct net_device_stats *macb_get_stats(struct net_device *dev)
1009 {
1010 struct macb *bp = netdev_priv(dev);
1011 struct net_device_stats *nstat = &bp->stats;
1012 struct macb_stats *hwstat = &bp->hw_stats;
1013
1014 /* read stats from hardware */
1015 macb_update_stats(bp);
1016
1017 /* Convert HW stats into netdevice stats */
1018 nstat->rx_errors = (hwstat->rx_fcs_errors +
1019 hwstat->rx_align_errors +
1020 hwstat->rx_resource_errors +
1021 hwstat->rx_overruns +
1022 hwstat->rx_oversize_pkts +
1023 hwstat->rx_jabbers +
1024 hwstat->rx_undersize_pkts +
1025 hwstat->sqe_test_errors +
1026 hwstat->rx_length_mismatch);
1027 nstat->tx_errors = (hwstat->tx_late_cols +
1028 hwstat->tx_excessive_cols +
1029 hwstat->tx_underruns +
1030 hwstat->tx_carrier_errors);
1031 nstat->collisions = (hwstat->tx_single_cols +
1032 hwstat->tx_multiple_cols +
1033 hwstat->tx_excessive_cols);
1034 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1035 hwstat->rx_jabbers +
1036 hwstat->rx_undersize_pkts +
1037 hwstat->rx_length_mismatch);
1038 nstat->rx_over_errors = hwstat->rx_resource_errors;
1039 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
1040 nstat->rx_frame_errors = hwstat->rx_align_errors;
1041 nstat->rx_fifo_errors = hwstat->rx_overruns;
1042 /* XXX: What does "missed" mean? */
1043 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
1044 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
1045 nstat->tx_fifo_errors = hwstat->tx_underruns;
1046 /* Don't know about heartbeat or window errors... */
1047
1048 return nstat;
1049 }
1050
macb_get_settings(struct net_device * dev,struct ethtool_cmd * cmd)1051 static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1052 {
1053 struct macb *bp = netdev_priv(dev);
1054 struct phy_device *phydev = bp->phy_dev;
1055
1056 if (!phydev)
1057 return -ENODEV;
1058
1059 return phy_ethtool_gset(phydev, cmd);
1060 }
1061
macb_set_settings(struct net_device * dev,struct ethtool_cmd * cmd)1062 static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1063 {
1064 struct macb *bp = netdev_priv(dev);
1065 struct phy_device *phydev = bp->phy_dev;
1066
1067 if (!phydev)
1068 return -ENODEV;
1069
1070 return phy_ethtool_sset(phydev, cmd);
1071 }
1072
macb_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1073 static void macb_get_drvinfo(struct net_device *dev,
1074 struct ethtool_drvinfo *info)
1075 {
1076 struct macb *bp = netdev_priv(dev);
1077
1078 strcpy(info->driver, bp->pdev->dev.driver->name);
1079 strcpy(info->version, "$Revision: 1.14 $");
1080 strcpy(info->bus_info, bp->pdev->dev.bus_id);
1081 }
1082
1083 static struct ethtool_ops macb_ethtool_ops = {
1084 .get_settings = macb_get_settings,
1085 .set_settings = macb_set_settings,
1086 .get_drvinfo = macb_get_drvinfo,
1087 .get_link = ethtool_op_get_link,
1088 };
1089
macb_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)1090 static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1091 {
1092 struct macb *bp = netdev_priv(dev);
1093 struct phy_device *phydev = bp->phy_dev;
1094
1095 if (!netif_running(dev))
1096 return -EINVAL;
1097
1098 if (!phydev)
1099 return -ENODEV;
1100
1101 return phy_mii_ioctl(phydev, if_mii(rq), cmd);
1102 }
1103
macb_probe(struct platform_device * pdev)1104 static int __init macb_probe(struct platform_device *pdev)
1105 {
1106 struct eth_platform_data *pdata;
1107 struct resource *regs;
1108 struct net_device *dev;
1109 struct macb *bp;
1110 struct phy_device *phydev;
1111 unsigned long pclk_hz;
1112 u32 config;
1113 int err = -ENXIO;
1114
1115 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1116 if (!regs) {
1117 dev_err(&pdev->dev, "no mmio resource defined\n");
1118 goto err_out;
1119 }
1120
1121 err = -ENOMEM;
1122 dev = alloc_etherdev(sizeof(*bp));
1123 if (!dev) {
1124 dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
1125 goto err_out;
1126 }
1127
1128 SET_NETDEV_DEV(dev, &pdev->dev);
1129
1130 /* TODO: Actually, we have some interesting features... */
1131 dev->features |= 0;
1132
1133 bp = netdev_priv(dev);
1134 bp->pdev = pdev;
1135 bp->dev = dev;
1136
1137 spin_lock_init(&bp->lock);
1138
1139 #if defined(CONFIG_ARCH_AT91)
1140 bp->pclk = clk_get(&pdev->dev, "macb_clk");
1141 if (IS_ERR(bp->pclk)) {
1142 dev_err(&pdev->dev, "failed to get macb_clk\n");
1143 goto err_out_free_dev;
1144 }
1145 clk_enable(bp->pclk);
1146 #else
1147 bp->pclk = clk_get(&pdev->dev, "pclk");
1148 if (IS_ERR(bp->pclk)) {
1149 dev_err(&pdev->dev, "failed to get pclk\n");
1150 goto err_out_free_dev;
1151 }
1152 bp->hclk = clk_get(&pdev->dev, "hclk");
1153 if (IS_ERR(bp->hclk)) {
1154 dev_err(&pdev->dev, "failed to get hclk\n");
1155 goto err_out_put_pclk;
1156 }
1157
1158 clk_enable(bp->pclk);
1159 clk_enable(bp->hclk);
1160 #endif
1161
1162 bp->regs = ioremap(regs->start, regs->end - regs->start + 1);
1163 if (!bp->regs) {
1164 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
1165 err = -ENOMEM;
1166 goto err_out_disable_clocks;
1167 }
1168
1169 dev->irq = platform_get_irq(pdev, 0);
1170 err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM,
1171 dev->name, dev);
1172 if (err) {
1173 printk(KERN_ERR
1174 "%s: Unable to request IRQ %d (error %d)\n",
1175 dev->name, dev->irq, err);
1176 goto err_out_iounmap;
1177 }
1178
1179 dev->open = macb_open;
1180 dev->stop = macb_close;
1181 dev->hard_start_xmit = macb_start_xmit;
1182 dev->get_stats = macb_get_stats;
1183 dev->set_multicast_list = macb_set_rx_mode;
1184 dev->do_ioctl = macb_ioctl;
1185 netif_napi_add(dev, &bp->napi, macb_poll, 64);
1186 dev->ethtool_ops = &macb_ethtool_ops;
1187
1188 dev->base_addr = regs->start;
1189
1190 /* Set MII management clock divider */
1191 pclk_hz = clk_get_rate(bp->pclk);
1192 if (pclk_hz <= 20000000)
1193 config = MACB_BF(CLK, MACB_CLK_DIV8);
1194 else if (pclk_hz <= 40000000)
1195 config = MACB_BF(CLK, MACB_CLK_DIV16);
1196 else if (pclk_hz <= 80000000)
1197 config = MACB_BF(CLK, MACB_CLK_DIV32);
1198 else
1199 config = MACB_BF(CLK, MACB_CLK_DIV64);
1200 macb_writel(bp, NCFGR, config);
1201
1202 macb_get_hwaddr(bp);
1203 pdata = pdev->dev.platform_data;
1204
1205 if (pdata && pdata->is_rmii)
1206 #if defined(CONFIG_ARCH_AT91)
1207 macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
1208 #else
1209 macb_writel(bp, USRIO, 0);
1210 #endif
1211 else
1212 #if defined(CONFIG_ARCH_AT91)
1213 macb_writel(bp, USRIO, MACB_BIT(CLKEN));
1214 #else
1215 macb_writel(bp, USRIO, MACB_BIT(MII));
1216 #endif
1217
1218 bp->tx_pending = DEF_TX_RING_PENDING;
1219
1220 err = register_netdev(dev);
1221 if (err) {
1222 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
1223 goto err_out_free_irq;
1224 }
1225
1226 if (macb_mii_init(bp) != 0) {
1227 goto err_out_unregister_netdev;
1228 }
1229
1230 platform_set_drvdata(pdev, dev);
1231
1232 printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d (%pM)\n",
1233 dev->name, dev->base_addr, dev->irq, dev->dev_addr);
1234
1235 phydev = bp->phy_dev;
1236 printk(KERN_INFO "%s: attached PHY driver [%s] "
1237 "(mii_bus:phy_addr=%s, irq=%d)\n",
1238 dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
1239
1240 return 0;
1241
1242 err_out_unregister_netdev:
1243 unregister_netdev(dev);
1244 err_out_free_irq:
1245 free_irq(dev->irq, dev);
1246 err_out_iounmap:
1247 iounmap(bp->regs);
1248 err_out_disable_clocks:
1249 #ifndef CONFIG_ARCH_AT91
1250 clk_disable(bp->hclk);
1251 clk_put(bp->hclk);
1252 #endif
1253 clk_disable(bp->pclk);
1254 #ifndef CONFIG_ARCH_AT91
1255 err_out_put_pclk:
1256 #endif
1257 clk_put(bp->pclk);
1258 err_out_free_dev:
1259 free_netdev(dev);
1260 err_out:
1261 platform_set_drvdata(pdev, NULL);
1262 return err;
1263 }
1264
macb_remove(struct platform_device * pdev)1265 static int __exit macb_remove(struct platform_device *pdev)
1266 {
1267 struct net_device *dev;
1268 struct macb *bp;
1269
1270 dev = platform_get_drvdata(pdev);
1271
1272 if (dev) {
1273 bp = netdev_priv(dev);
1274 if (bp->phy_dev)
1275 phy_disconnect(bp->phy_dev);
1276 mdiobus_unregister(bp->mii_bus);
1277 kfree(bp->mii_bus->irq);
1278 mdiobus_free(bp->mii_bus);
1279 unregister_netdev(dev);
1280 free_irq(dev->irq, dev);
1281 iounmap(bp->regs);
1282 #ifndef CONFIG_ARCH_AT91
1283 clk_disable(bp->hclk);
1284 clk_put(bp->hclk);
1285 #endif
1286 clk_disable(bp->pclk);
1287 clk_put(bp->pclk);
1288 free_netdev(dev);
1289 platform_set_drvdata(pdev, NULL);
1290 }
1291
1292 return 0;
1293 }
1294
1295 #ifdef CONFIG_PM
macb_suspend(struct platform_device * pdev,pm_message_t state)1296 static int macb_suspend(struct platform_device *pdev, pm_message_t state)
1297 {
1298 struct net_device *netdev = platform_get_drvdata(pdev);
1299 struct macb *bp = netdev_priv(netdev);
1300
1301 netif_device_detach(netdev);
1302
1303 #ifndef CONFIG_ARCH_AT91
1304 clk_disable(bp->hclk);
1305 #endif
1306 clk_disable(bp->pclk);
1307
1308 return 0;
1309 }
1310
macb_resume(struct platform_device * pdev)1311 static int macb_resume(struct platform_device *pdev)
1312 {
1313 struct net_device *netdev = platform_get_drvdata(pdev);
1314 struct macb *bp = netdev_priv(netdev);
1315
1316 clk_enable(bp->pclk);
1317 #ifndef CONFIG_ARCH_AT91
1318 clk_enable(bp->hclk);
1319 #endif
1320
1321 netif_device_attach(netdev);
1322
1323 return 0;
1324 }
1325 #else
1326 #define macb_suspend NULL
1327 #define macb_resume NULL
1328 #endif
1329
1330 static struct platform_driver macb_driver = {
1331 .remove = __exit_p(macb_remove),
1332 .suspend = macb_suspend,
1333 .resume = macb_resume,
1334 .driver = {
1335 .name = "macb",
1336 .owner = THIS_MODULE,
1337 },
1338 };
1339
macb_init(void)1340 static int __init macb_init(void)
1341 {
1342 return platform_driver_probe(&macb_driver, macb_probe);
1343 }
1344
macb_exit(void)1345 static void __exit macb_exit(void)
1346 {
1347 platform_driver_unregister(&macb_driver);
1348 }
1349
1350 module_init(macb_init);
1351 module_exit(macb_exit);
1352
1353 MODULE_LICENSE("GPL");
1354 MODULE_DESCRIPTION("Atmel MACB Ethernet driver");
1355 MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
1356 MODULE_ALIAS("platform:macb");
1357