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89e5785f HS |
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/mii.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/dma-mapping.h> | |
23 | #include <linux/ethtool.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
26 | #include <asm/arch/board.h> | |
27 | ||
28 | #include "macb.h" | |
29 | ||
30 | #define to_net_dev(class) container_of(class, struct net_device, class_dev) | |
31 | ||
32 | #define RX_BUFFER_SIZE 128 | |
33 | #define RX_RING_SIZE 512 | |
34 | #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE) | |
35 | ||
36 | /* Make the IP header word-aligned (the ethernet header is 14 bytes) */ | |
37 | #define RX_OFFSET 2 | |
38 | ||
39 | #define TX_RING_SIZE 128 | |
40 | #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1) | |
41 | #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE) | |
42 | ||
43 | #define TX_RING_GAP(bp) \ | |
44 | (TX_RING_SIZE - (bp)->tx_pending) | |
45 | #define TX_BUFFS_AVAIL(bp) \ | |
46 | (((bp)->tx_tail <= (bp)->tx_head) ? \ | |
47 | (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \ | |
48 | (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp)) | |
49 | #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1)) | |
50 | ||
51 | #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1)) | |
52 | ||
53 | /* minimum number of free TX descriptors before waking up TX process */ | |
54 | #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4) | |
55 | ||
56 | #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \ | |
57 | | MACB_BIT(ISR_ROVR)) | |
58 | ||
59 | static void __macb_set_hwaddr(struct macb *bp) | |
60 | { | |
61 | u32 bottom; | |
62 | u16 top; | |
63 | ||
64 | bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); | |
65 | macb_writel(bp, SA1B, bottom); | |
66 | top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); | |
67 | macb_writel(bp, SA1T, top); | |
68 | } | |
69 | ||
70 | static void __init macb_get_hwaddr(struct macb *bp) | |
71 | { | |
72 | u32 bottom; | |
73 | u16 top; | |
74 | u8 addr[6]; | |
75 | ||
76 | bottom = macb_readl(bp, SA1B); | |
77 | top = macb_readl(bp, SA1T); | |
78 | ||
79 | addr[0] = bottom & 0xff; | |
80 | addr[1] = (bottom >> 8) & 0xff; | |
81 | addr[2] = (bottom >> 16) & 0xff; | |
82 | addr[3] = (bottom >> 24) & 0xff; | |
83 | addr[4] = top & 0xff; | |
84 | addr[5] = (top >> 8) & 0xff; | |
85 | ||
86 | if (is_valid_ether_addr(addr)) | |
87 | memcpy(bp->dev->dev_addr, addr, sizeof(addr)); | |
88 | } | |
89 | ||
90 | static void macb_enable_mdio(struct macb *bp) | |
91 | { | |
92 | unsigned long flags; | |
93 | u32 reg; | |
94 | ||
95 | spin_lock_irqsave(&bp->lock, flags); | |
96 | reg = macb_readl(bp, NCR); | |
97 | reg |= MACB_BIT(MPE); | |
98 | macb_writel(bp, NCR, reg); | |
99 | macb_writel(bp, IER, MACB_BIT(MFD)); | |
100 | spin_unlock_irqrestore(&bp->lock, flags); | |
101 | } | |
102 | ||
103 | static void macb_disable_mdio(struct macb *bp) | |
104 | { | |
105 | unsigned long flags; | |
106 | u32 reg; | |
107 | ||
108 | spin_lock_irqsave(&bp->lock, flags); | |
109 | reg = macb_readl(bp, NCR); | |
110 | reg &= ~MACB_BIT(MPE); | |
111 | macb_writel(bp, NCR, reg); | |
112 | macb_writel(bp, IDR, MACB_BIT(MFD)); | |
113 | spin_unlock_irqrestore(&bp->lock, flags); | |
114 | } | |
115 | ||
116 | static int macb_mdio_read(struct net_device *dev, int phy_id, int location) | |
117 | { | |
118 | struct macb *bp = netdev_priv(dev); | |
119 | int value; | |
120 | ||
121 | mutex_lock(&bp->mdio_mutex); | |
122 | ||
123 | macb_enable_mdio(bp); | |
124 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | |
125 | | MACB_BF(RW, MACB_MAN_READ) | |
126 | | MACB_BF(PHYA, phy_id) | |
127 | | MACB_BF(REGA, location) | |
128 | | MACB_BF(CODE, MACB_MAN_CODE))); | |
129 | ||
130 | wait_for_completion(&bp->mdio_complete); | |
131 | ||
132 | value = MACB_BFEXT(DATA, macb_readl(bp, MAN)); | |
133 | macb_disable_mdio(bp); | |
134 | mutex_unlock(&bp->mdio_mutex); | |
135 | ||
136 | return value; | |
137 | } | |
138 | ||
139 | static void macb_mdio_write(struct net_device *dev, int phy_id, | |
140 | int location, int val) | |
141 | { | |
142 | struct macb *bp = netdev_priv(dev); | |
143 | ||
144 | dev_dbg(&bp->pdev->dev, "mdio_write %02x:%02x <- %04x\n", | |
145 | phy_id, location, val); | |
146 | ||
147 | mutex_lock(&bp->mdio_mutex); | |
148 | macb_enable_mdio(bp); | |
149 | ||
150 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | |
151 | | MACB_BF(RW, MACB_MAN_WRITE) | |
152 | | MACB_BF(PHYA, phy_id) | |
153 | | MACB_BF(REGA, location) | |
154 | | MACB_BF(CODE, MACB_MAN_CODE) | |
155 | | MACB_BF(DATA, val))); | |
156 | ||
157 | wait_for_completion(&bp->mdio_complete); | |
158 | ||
159 | macb_disable_mdio(bp); | |
160 | mutex_unlock(&bp->mdio_mutex); | |
161 | } | |
162 | ||
163 | static int macb_phy_probe(struct macb *bp) | |
164 | { | |
165 | int phy_address; | |
166 | u16 phyid1, phyid2; | |
167 | ||
168 | for (phy_address = 0; phy_address < 32; phy_address++) { | |
169 | phyid1 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID1); | |
170 | phyid2 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID2); | |
171 | ||
172 | if (phyid1 != 0xffff && phyid1 != 0x0000 | |
173 | && phyid2 != 0xffff && phyid2 != 0x0000) | |
174 | break; | |
175 | } | |
176 | ||
177 | if (phy_address == 32) | |
178 | return -ENODEV; | |
179 | ||
180 | dev_info(&bp->pdev->dev, | |
181 | "detected PHY at address %d (ID %04x:%04x)\n", | |
182 | phy_address, phyid1, phyid2); | |
183 | ||
184 | bp->mii.phy_id = phy_address; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static void macb_set_media(struct macb *bp, int media) | |
189 | { | |
190 | u32 reg; | |
191 | ||
192 | spin_lock_irq(&bp->lock); | |
193 | reg = macb_readl(bp, NCFGR); | |
194 | reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); | |
195 | if (media & (ADVERTISE_100HALF | ADVERTISE_100FULL)) | |
196 | reg |= MACB_BIT(SPD); | |
197 | if (media & ADVERTISE_FULL) | |
198 | reg |= MACB_BIT(FD); | |
199 | macb_writel(bp, NCFGR, reg); | |
200 | spin_unlock_irq(&bp->lock); | |
201 | } | |
202 | ||
203 | static void macb_check_media(struct macb *bp, int ok_to_print, int init_media) | |
204 | { | |
205 | struct mii_if_info *mii = &bp->mii; | |
206 | unsigned int old_carrier, new_carrier; | |
207 | int advertise, lpa, media, duplex; | |
208 | ||
209 | /* if forced media, go no further */ | |
210 | if (mii->force_media) | |
211 | return; | |
212 | ||
213 | /* check current and old link status */ | |
214 | old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0; | |
215 | new_carrier = (unsigned int) mii_link_ok(mii); | |
216 | ||
217 | /* if carrier state did not change, assume nothing else did */ | |
218 | if (!init_media && old_carrier == new_carrier) | |
219 | return; | |
220 | ||
221 | /* no carrier, nothing much to do */ | |
222 | if (!new_carrier) { | |
223 | netif_carrier_off(mii->dev); | |
224 | printk(KERN_INFO "%s: link down\n", mii->dev->name); | |
225 | return; | |
226 | } | |
227 | ||
228 | /* | |
229 | * we have carrier, see who's on the other end | |
230 | */ | |
231 | netif_carrier_on(mii->dev); | |
232 | ||
233 | /* get MII advertise and LPA values */ | |
234 | if (!init_media && mii->advertising) { | |
235 | advertise = mii->advertising; | |
236 | } else { | |
237 | advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE); | |
238 | mii->advertising = advertise; | |
239 | } | |
240 | lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); | |
241 | ||
242 | /* figure out media and duplex from advertise and LPA values */ | |
243 | media = mii_nway_result(lpa & advertise); | |
244 | duplex = (media & ADVERTISE_FULL) ? 1 : 0; | |
245 | ||
246 | if (ok_to_print) | |
247 | printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n", | |
248 | mii->dev->name, | |
249 | media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10", | |
250 | duplex ? "full" : "half", lpa); | |
251 | ||
252 | mii->full_duplex = duplex; | |
253 | ||
254 | /* Let the MAC know about the new link state */ | |
255 | macb_set_media(bp, media); | |
256 | } | |
257 | ||
258 | static void macb_update_stats(struct macb *bp) | |
259 | { | |
260 | u32 __iomem *reg = bp->regs + MACB_PFR; | |
261 | u32 *p = &bp->hw_stats.rx_pause_frames; | |
262 | u32 *end = &bp->hw_stats.tx_pause_frames + 1; | |
263 | ||
264 | WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); | |
265 | ||
266 | for(; p < end; p++, reg++) | |
267 | *p += readl(reg); | |
268 | } | |
269 | ||
270 | static void macb_periodic_task(void *arg) | |
271 | { | |
272 | struct macb *bp = arg; | |
273 | ||
274 | macb_update_stats(bp); | |
275 | macb_check_media(bp, 1, 0); | |
276 | ||
277 | schedule_delayed_work(&bp->periodic_task, HZ); | |
278 | } | |
279 | ||
280 | static void macb_tx(struct macb *bp) | |
281 | { | |
282 | unsigned int tail; | |
283 | unsigned int head; | |
284 | u32 status; | |
285 | ||
286 | status = macb_readl(bp, TSR); | |
287 | macb_writel(bp, TSR, status); | |
288 | ||
289 | dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n", | |
290 | (unsigned long)status); | |
291 | ||
292 | if (status & MACB_BIT(UND)) { | |
293 | printk(KERN_ERR "%s: TX underrun, resetting buffers\n", | |
294 | bp->dev->name); | |
295 | bp->tx_head = bp->tx_tail = 0; | |
296 | } | |
297 | ||
298 | if (!(status & MACB_BIT(COMP))) | |
299 | /* | |
300 | * This may happen when a buffer becomes complete | |
301 | * between reading the ISR and scanning the | |
302 | * descriptors. Nothing to worry about. | |
303 | */ | |
304 | return; | |
305 | ||
306 | head = bp->tx_head; | |
307 | for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { | |
308 | struct ring_info *rp = &bp->tx_skb[tail]; | |
309 | struct sk_buff *skb = rp->skb; | |
310 | u32 bufstat; | |
311 | ||
312 | BUG_ON(skb == NULL); | |
313 | ||
314 | rmb(); | |
315 | bufstat = bp->tx_ring[tail].ctrl; | |
316 | ||
317 | if (!(bufstat & MACB_BIT(TX_USED))) | |
318 | break; | |
319 | ||
320 | dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n", | |
321 | tail, skb->data); | |
322 | dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len, | |
323 | DMA_TO_DEVICE); | |
324 | bp->stats.tx_packets++; | |
325 | bp->stats.tx_bytes += skb->len; | |
326 | rp->skb = NULL; | |
327 | dev_kfree_skb_irq(skb); | |
328 | } | |
329 | ||
330 | bp->tx_tail = tail; | |
331 | if (netif_queue_stopped(bp->dev) && | |
332 | TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH) | |
333 | netif_wake_queue(bp->dev); | |
334 | } | |
335 | ||
336 | static int macb_rx_frame(struct macb *bp, unsigned int first_frag, | |
337 | unsigned int last_frag) | |
338 | { | |
339 | unsigned int len; | |
340 | unsigned int frag; | |
341 | unsigned int offset = 0; | |
342 | struct sk_buff *skb; | |
343 | ||
344 | len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl); | |
345 | ||
346 | dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n", | |
347 | first_frag, last_frag, len); | |
348 | ||
349 | skb = dev_alloc_skb(len + RX_OFFSET); | |
350 | if (!skb) { | |
351 | bp->stats.rx_dropped++; | |
352 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { | |
353 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
354 | if (frag == last_frag) | |
355 | break; | |
356 | } | |
357 | wmb(); | |
358 | return 1; | |
359 | } | |
360 | ||
361 | skb_reserve(skb, RX_OFFSET); | |
362 | skb->dev = bp->dev; | |
363 | skb->ip_summed = CHECKSUM_NONE; | |
364 | skb_put(skb, len); | |
365 | ||
366 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { | |
367 | unsigned int frag_len = RX_BUFFER_SIZE; | |
368 | ||
369 | if (offset + frag_len > len) { | |
370 | BUG_ON(frag != last_frag); | |
371 | frag_len = len - offset; | |
372 | } | |
373 | memcpy(skb->data + offset, | |
374 | bp->rx_buffers + (RX_BUFFER_SIZE * frag), | |
375 | frag_len); | |
376 | offset += RX_BUFFER_SIZE; | |
377 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
378 | wmb(); | |
379 | ||
380 | if (frag == last_frag) | |
381 | break; | |
382 | } | |
383 | ||
384 | skb->protocol = eth_type_trans(skb, bp->dev); | |
385 | ||
386 | bp->stats.rx_packets++; | |
387 | bp->stats.rx_bytes += len; | |
388 | bp->dev->last_rx = jiffies; | |
389 | dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n", | |
390 | skb->len, skb->csum); | |
391 | netif_receive_skb(skb); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | /* Mark DMA descriptors from begin up to and not including end as unused */ | |
397 | static void discard_partial_frame(struct macb *bp, unsigned int begin, | |
398 | unsigned int end) | |
399 | { | |
400 | unsigned int frag; | |
401 | ||
402 | for (frag = begin; frag != end; frag = NEXT_RX(frag)) | |
403 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
404 | wmb(); | |
405 | ||
406 | /* | |
407 | * When this happens, the hardware stats registers for | |
408 | * whatever caused this is updated, so we don't have to record | |
409 | * anything. | |
410 | */ | |
411 | } | |
412 | ||
413 | static int macb_rx(struct macb *bp, int budget) | |
414 | { | |
415 | int received = 0; | |
416 | unsigned int tail = bp->rx_tail; | |
417 | int first_frag = -1; | |
418 | ||
419 | for (; budget > 0; tail = NEXT_RX(tail)) { | |
420 | u32 addr, ctrl; | |
421 | ||
422 | rmb(); | |
423 | addr = bp->rx_ring[tail].addr; | |
424 | ctrl = bp->rx_ring[tail].ctrl; | |
425 | ||
426 | if (!(addr & MACB_BIT(RX_USED))) | |
427 | break; | |
428 | ||
429 | if (ctrl & MACB_BIT(RX_SOF)) { | |
430 | if (first_frag != -1) | |
431 | discard_partial_frame(bp, first_frag, tail); | |
432 | first_frag = tail; | |
433 | } | |
434 | ||
435 | if (ctrl & MACB_BIT(RX_EOF)) { | |
436 | int dropped; | |
437 | BUG_ON(first_frag == -1); | |
438 | ||
439 | dropped = macb_rx_frame(bp, first_frag, tail); | |
440 | first_frag = -1; | |
441 | if (!dropped) { | |
442 | received++; | |
443 | budget--; | |
444 | } | |
445 | } | |
446 | } | |
447 | ||
448 | if (first_frag != -1) | |
449 | bp->rx_tail = first_frag; | |
450 | else | |
451 | bp->rx_tail = tail; | |
452 | ||
453 | return received; | |
454 | } | |
455 | ||
456 | static int macb_poll(struct net_device *dev, int *budget) | |
457 | { | |
458 | struct macb *bp = netdev_priv(dev); | |
459 | int orig_budget, work_done, retval = 0; | |
460 | u32 status; | |
461 | ||
462 | status = macb_readl(bp, RSR); | |
463 | macb_writel(bp, RSR, status); | |
464 | ||
465 | if (!status) { | |
466 | /* | |
467 | * This may happen if an interrupt was pending before | |
468 | * this function was called last time, and no packets | |
469 | * have been received since. | |
470 | */ | |
471 | netif_rx_complete(dev); | |
472 | goto out; | |
473 | } | |
474 | ||
475 | dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n", | |
476 | (unsigned long)status, *budget); | |
477 | ||
478 | if (!(status & MACB_BIT(REC))) { | |
479 | dev_warn(&bp->pdev->dev, | |
480 | "No RX buffers complete, status = %02lx\n", | |
481 | (unsigned long)status); | |
482 | netif_rx_complete(dev); | |
483 | goto out; | |
484 | } | |
485 | ||
486 | orig_budget = *budget; | |
487 | if (orig_budget > dev->quota) | |
488 | orig_budget = dev->quota; | |
489 | ||
490 | work_done = macb_rx(bp, orig_budget); | |
491 | if (work_done < orig_budget) { | |
492 | netif_rx_complete(dev); | |
493 | retval = 0; | |
494 | } else { | |
495 | retval = 1; | |
496 | } | |
497 | ||
498 | /* | |
499 | * We've done what we can to clean the buffers. Make sure we | |
500 | * get notified when new packets arrive. | |
501 | */ | |
502 | out: | |
503 | macb_writel(bp, IER, MACB_RX_INT_FLAGS); | |
504 | ||
505 | /* TODO: Handle errors */ | |
506 | ||
507 | return retval; | |
508 | } | |
509 | ||
510 | static irqreturn_t macb_interrupt(int irq, void *dev_id) | |
511 | { | |
512 | struct net_device *dev = dev_id; | |
513 | struct macb *bp = netdev_priv(dev); | |
514 | u32 status; | |
515 | ||
516 | status = macb_readl(bp, ISR); | |
517 | ||
518 | if (unlikely(!status)) | |
519 | return IRQ_NONE; | |
520 | ||
521 | spin_lock(&bp->lock); | |
522 | ||
523 | while (status) { | |
524 | if (status & MACB_BIT(MFD)) | |
525 | complete(&bp->mdio_complete); | |
526 | ||
527 | /* close possible race with dev_close */ | |
528 | if (unlikely(!netif_running(dev))) { | |
529 | macb_writel(bp, IDR, ~0UL); | |
530 | break; | |
531 | } | |
532 | ||
533 | if (status & MACB_RX_INT_FLAGS) { | |
534 | if (netif_rx_schedule_prep(dev)) { | |
535 | /* | |
536 | * There's no point taking any more interrupts | |
537 | * until we have processed the buffers | |
538 | */ | |
539 | macb_writel(bp, IDR, MACB_RX_INT_FLAGS); | |
540 | dev_dbg(&bp->pdev->dev, "scheduling RX softirq\n"); | |
541 | __netif_rx_schedule(dev); | |
542 | } | |
543 | } | |
544 | ||
545 | if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND))) | |
546 | macb_tx(bp); | |
547 | ||
548 | /* | |
549 | * Link change detection isn't possible with RMII, so we'll | |
550 | * add that if/when we get our hands on a full-blown MII PHY. | |
551 | */ | |
552 | ||
553 | if (status & MACB_BIT(HRESP)) { | |
554 | /* | |
555 | * TODO: Reset the hardware, and maybe move the printk | |
556 | * to a lower-priority context as well (work queue?) | |
557 | */ | |
558 | printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n", | |
559 | dev->name); | |
560 | } | |
561 | ||
562 | status = macb_readl(bp, ISR); | |
563 | } | |
564 | ||
565 | spin_unlock(&bp->lock); | |
566 | ||
567 | return IRQ_HANDLED; | |
568 | } | |
569 | ||
570 | static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
571 | { | |
572 | struct macb *bp = netdev_priv(dev); | |
573 | dma_addr_t mapping; | |
574 | unsigned int len, entry; | |
575 | u32 ctrl; | |
576 | ||
577 | #ifdef DEBUG | |
578 | int i; | |
579 | dev_dbg(&bp->pdev->dev, | |
580 | "start_xmit: len %u head %p data %p tail %p end %p\n", | |
581 | skb->len, skb->head, skb->data, skb->tail, skb->end); | |
582 | dev_dbg(&bp->pdev->dev, | |
583 | "data:"); | |
584 | for (i = 0; i < 16; i++) | |
585 | printk(" %02x", (unsigned int)skb->data[i]); | |
586 | printk("\n"); | |
587 | #endif | |
588 | ||
589 | len = skb->len; | |
590 | spin_lock_irq(&bp->lock); | |
591 | ||
592 | /* This is a hard error, log it. */ | |
593 | if (TX_BUFFS_AVAIL(bp) < 1) { | |
594 | netif_stop_queue(dev); | |
595 | spin_unlock_irq(&bp->lock); | |
596 | dev_err(&bp->pdev->dev, | |
597 | "BUG! Tx Ring full when queue awake!\n"); | |
598 | dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n", | |
599 | bp->tx_head, bp->tx_tail); | |
600 | return 1; | |
601 | } | |
602 | ||
603 | entry = bp->tx_head; | |
604 | dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry); | |
605 | mapping = dma_map_single(&bp->pdev->dev, skb->data, | |
606 | len, DMA_TO_DEVICE); | |
607 | bp->tx_skb[entry].skb = skb; | |
608 | bp->tx_skb[entry].mapping = mapping; | |
609 | dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n", | |
610 | skb->data, (unsigned long)mapping); | |
611 | ||
612 | ctrl = MACB_BF(TX_FRMLEN, len); | |
613 | ctrl |= MACB_BIT(TX_LAST); | |
614 | if (entry == (TX_RING_SIZE - 1)) | |
615 | ctrl |= MACB_BIT(TX_WRAP); | |
616 | ||
617 | bp->tx_ring[entry].addr = mapping; | |
618 | bp->tx_ring[entry].ctrl = ctrl; | |
619 | wmb(); | |
620 | ||
621 | entry = NEXT_TX(entry); | |
622 | bp->tx_head = entry; | |
623 | ||
624 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); | |
625 | ||
626 | if (TX_BUFFS_AVAIL(bp) < 1) | |
627 | netif_stop_queue(dev); | |
628 | ||
629 | spin_unlock_irq(&bp->lock); | |
630 | ||
631 | dev->trans_start = jiffies; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static void macb_free_consistent(struct macb *bp) | |
637 | { | |
638 | if (bp->tx_skb) { | |
639 | kfree(bp->tx_skb); | |
640 | bp->tx_skb = NULL; | |
641 | } | |
642 | if (bp->rx_ring) { | |
643 | dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES, | |
644 | bp->rx_ring, bp->rx_ring_dma); | |
645 | bp->rx_ring = NULL; | |
646 | } | |
647 | if (bp->tx_ring) { | |
648 | dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES, | |
649 | bp->tx_ring, bp->tx_ring_dma); | |
650 | bp->tx_ring = NULL; | |
651 | } | |
652 | if (bp->rx_buffers) { | |
653 | dma_free_coherent(&bp->pdev->dev, | |
654 | RX_RING_SIZE * RX_BUFFER_SIZE, | |
655 | bp->rx_buffers, bp->rx_buffers_dma); | |
656 | bp->rx_buffers = NULL; | |
657 | } | |
658 | } | |
659 | ||
660 | static int macb_alloc_consistent(struct macb *bp) | |
661 | { | |
662 | int size; | |
663 | ||
664 | size = TX_RING_SIZE * sizeof(struct ring_info); | |
665 | bp->tx_skb = kmalloc(size, GFP_KERNEL); | |
666 | if (!bp->tx_skb) | |
667 | goto out_err; | |
668 | ||
669 | size = RX_RING_BYTES; | |
670 | bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
671 | &bp->rx_ring_dma, GFP_KERNEL); | |
672 | if (!bp->rx_ring) | |
673 | goto out_err; | |
674 | dev_dbg(&bp->pdev->dev, | |
675 | "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", | |
676 | size, (unsigned long)bp->rx_ring_dma, bp->rx_ring); | |
677 | ||
678 | size = TX_RING_BYTES; | |
679 | bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
680 | &bp->tx_ring_dma, GFP_KERNEL); | |
681 | if (!bp->tx_ring) | |
682 | goto out_err; | |
683 | dev_dbg(&bp->pdev->dev, | |
684 | "Allocated TX ring of %d bytes at %08lx (mapped %p)\n", | |
685 | size, (unsigned long)bp->tx_ring_dma, bp->tx_ring); | |
686 | ||
687 | size = RX_RING_SIZE * RX_BUFFER_SIZE; | |
688 | bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, | |
689 | &bp->rx_buffers_dma, GFP_KERNEL); | |
690 | if (!bp->rx_buffers) | |
691 | goto out_err; | |
692 | dev_dbg(&bp->pdev->dev, | |
693 | "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", | |
694 | size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers); | |
695 | ||
696 | return 0; | |
697 | ||
698 | out_err: | |
699 | macb_free_consistent(bp); | |
700 | return -ENOMEM; | |
701 | } | |
702 | ||
703 | static void macb_init_rings(struct macb *bp) | |
704 | { | |
705 | int i; | |
706 | dma_addr_t addr; | |
707 | ||
708 | addr = bp->rx_buffers_dma; | |
709 | for (i = 0; i < RX_RING_SIZE; i++) { | |
710 | bp->rx_ring[i].addr = addr; | |
711 | bp->rx_ring[i].ctrl = 0; | |
712 | addr += RX_BUFFER_SIZE; | |
713 | } | |
714 | bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP); | |
715 | ||
716 | for (i = 0; i < TX_RING_SIZE; i++) { | |
717 | bp->tx_ring[i].addr = 0; | |
718 | bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); | |
719 | } | |
720 | bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); | |
721 | ||
722 | bp->rx_tail = bp->tx_head = bp->tx_tail = 0; | |
723 | } | |
724 | ||
725 | static void macb_reset_hw(struct macb *bp) | |
726 | { | |
727 | /* Make sure we have the write buffer for ourselves */ | |
728 | wmb(); | |
729 | ||
730 | /* | |
731 | * Disable RX and TX (XXX: Should we halt the transmission | |
732 | * more gracefully?) | |
733 | */ | |
734 | macb_writel(bp, NCR, 0); | |
735 | ||
736 | /* Clear the stats registers (XXX: Update stats first?) */ | |
737 | macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); | |
738 | ||
739 | /* Clear all status flags */ | |
740 | macb_writel(bp, TSR, ~0UL); | |
741 | macb_writel(bp, RSR, ~0UL); | |
742 | ||
743 | /* Disable all interrupts */ | |
744 | macb_writel(bp, IDR, ~0UL); | |
745 | macb_readl(bp, ISR); | |
746 | } | |
747 | ||
748 | static void macb_init_hw(struct macb *bp) | |
749 | { | |
750 | u32 config; | |
751 | ||
752 | macb_reset_hw(bp); | |
753 | __macb_set_hwaddr(bp); | |
754 | ||
755 | config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L); | |
756 | config |= MACB_BIT(PAE); /* PAuse Enable */ | |
757 | config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ | |
758 | if (bp->dev->flags & IFF_PROMISC) | |
759 | config |= MACB_BIT(CAF); /* Copy All Frames */ | |
760 | if (!(bp->dev->flags & IFF_BROADCAST)) | |
761 | config |= MACB_BIT(NBC); /* No BroadCast */ | |
762 | macb_writel(bp, NCFGR, config); | |
763 | ||
764 | /* Initialize TX and RX buffers */ | |
765 | macb_writel(bp, RBQP, bp->rx_ring_dma); | |
766 | macb_writel(bp, TBQP, bp->tx_ring_dma); | |
767 | ||
768 | /* Enable TX and RX */ | |
769 | macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE)); | |
770 | ||
771 | /* Enable interrupts */ | |
772 | macb_writel(bp, IER, (MACB_BIT(RCOMP) | |
773 | | MACB_BIT(RXUBR) | |
774 | | MACB_BIT(ISR_TUND) | |
775 | | MACB_BIT(ISR_RLE) | |
776 | | MACB_BIT(TXERR) | |
777 | | MACB_BIT(TCOMP) | |
778 | | MACB_BIT(ISR_ROVR) | |
779 | | MACB_BIT(HRESP))); | |
780 | } | |
781 | ||
782 | static void macb_init_phy(struct net_device *dev) | |
783 | { | |
784 | struct macb *bp = netdev_priv(dev); | |
785 | ||
786 | /* Set some reasonable default settings */ | |
787 | macb_mdio_write(dev, bp->mii.phy_id, MII_ADVERTISE, | |
788 | ADVERTISE_CSMA | ADVERTISE_ALL); | |
789 | macb_mdio_write(dev, bp->mii.phy_id, MII_BMCR, | |
790 | (BMCR_SPEED100 | BMCR_ANENABLE | |
791 | | BMCR_ANRESTART | BMCR_FULLDPLX)); | |
792 | } | |
793 | ||
794 | static int macb_open(struct net_device *dev) | |
795 | { | |
796 | struct macb *bp = netdev_priv(dev); | |
797 | int err; | |
798 | ||
799 | dev_dbg(&bp->pdev->dev, "open\n"); | |
800 | ||
801 | if (!is_valid_ether_addr(dev->dev_addr)) | |
802 | return -EADDRNOTAVAIL; | |
803 | ||
804 | err = macb_alloc_consistent(bp); | |
805 | if (err) { | |
806 | printk(KERN_ERR | |
807 | "%s: Unable to allocate DMA memory (error %d)\n", | |
808 | dev->name, err); | |
809 | return err; | |
810 | } | |
811 | ||
812 | macb_init_rings(bp); | |
813 | macb_init_hw(bp); | |
814 | macb_init_phy(dev); | |
815 | ||
816 | macb_check_media(bp, 1, 1); | |
817 | netif_start_queue(dev); | |
818 | ||
819 | schedule_delayed_work(&bp->periodic_task, HZ); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | static int macb_close(struct net_device *dev) | |
825 | { | |
826 | struct macb *bp = netdev_priv(dev); | |
827 | unsigned long flags; | |
828 | ||
829 | cancel_rearming_delayed_work(&bp->periodic_task); | |
830 | ||
831 | netif_stop_queue(dev); | |
832 | ||
833 | spin_lock_irqsave(&bp->lock, flags); | |
834 | macb_reset_hw(bp); | |
835 | netif_carrier_off(dev); | |
836 | spin_unlock_irqrestore(&bp->lock, flags); | |
837 | ||
838 | macb_free_consistent(bp); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | static struct net_device_stats *macb_get_stats(struct net_device *dev) | |
844 | { | |
845 | struct macb *bp = netdev_priv(dev); | |
846 | struct net_device_stats *nstat = &bp->stats; | |
847 | struct macb_stats *hwstat = &bp->hw_stats; | |
848 | ||
849 | /* Convert HW stats into netdevice stats */ | |
850 | nstat->rx_errors = (hwstat->rx_fcs_errors + | |
851 | hwstat->rx_align_errors + | |
852 | hwstat->rx_resource_errors + | |
853 | hwstat->rx_overruns + | |
854 | hwstat->rx_oversize_pkts + | |
855 | hwstat->rx_jabbers + | |
856 | hwstat->rx_undersize_pkts + | |
857 | hwstat->sqe_test_errors + | |
858 | hwstat->rx_length_mismatch); | |
859 | nstat->tx_errors = (hwstat->tx_late_cols + | |
860 | hwstat->tx_excessive_cols + | |
861 | hwstat->tx_underruns + | |
862 | hwstat->tx_carrier_errors); | |
863 | nstat->collisions = (hwstat->tx_single_cols + | |
864 | hwstat->tx_multiple_cols + | |
865 | hwstat->tx_excessive_cols); | |
866 | nstat->rx_length_errors = (hwstat->rx_oversize_pkts + | |
867 | hwstat->rx_jabbers + | |
868 | hwstat->rx_undersize_pkts + | |
869 | hwstat->rx_length_mismatch); | |
870 | nstat->rx_over_errors = hwstat->rx_resource_errors; | |
871 | nstat->rx_crc_errors = hwstat->rx_fcs_errors; | |
872 | nstat->rx_frame_errors = hwstat->rx_align_errors; | |
873 | nstat->rx_fifo_errors = hwstat->rx_overruns; | |
874 | /* XXX: What does "missed" mean? */ | |
875 | nstat->tx_aborted_errors = hwstat->tx_excessive_cols; | |
876 | nstat->tx_carrier_errors = hwstat->tx_carrier_errors; | |
877 | nstat->tx_fifo_errors = hwstat->tx_underruns; | |
878 | /* Don't know about heartbeat or window errors... */ | |
879 | ||
880 | return nstat; | |
881 | } | |
882 | ||
883 | static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
884 | { | |
885 | struct macb *bp = netdev_priv(dev); | |
886 | int ret; | |
887 | unsigned long flags; | |
888 | ||
889 | spin_lock_irqsave(&bp->lock, flags); | |
890 | ret = mii_ethtool_gset(&bp->mii, cmd); | |
891 | spin_unlock_irqrestore(&bp->lock, flags); | |
892 | ||
893 | return ret; | |
894 | } | |
895 | ||
896 | static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
897 | { | |
898 | struct macb *bp = netdev_priv(dev); | |
899 | int ret; | |
900 | unsigned long flags; | |
901 | ||
902 | spin_lock_irqsave(&bp->lock, flags); | |
903 | ret = mii_ethtool_sset(&bp->mii, cmd); | |
904 | spin_unlock_irqrestore(&bp->lock, flags); | |
905 | ||
906 | return ret; | |
907 | } | |
908 | ||
909 | static void macb_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
910 | { | |
911 | struct macb *bp = netdev_priv(dev); | |
912 | ||
913 | strcpy(info->driver, bp->pdev->dev.driver->name); | |
914 | strcpy(info->version, "$Revision: 1.14 $"); | |
915 | strcpy(info->bus_info, bp->pdev->dev.bus_id); | |
916 | } | |
917 | ||
918 | static int macb_nway_reset(struct net_device *dev) | |
919 | { | |
920 | struct macb *bp = netdev_priv(dev); | |
921 | return mii_nway_restart(&bp->mii); | |
922 | } | |
923 | ||
924 | static struct ethtool_ops macb_ethtool_ops = { | |
925 | .get_settings = macb_get_settings, | |
926 | .set_settings = macb_set_settings, | |
927 | .get_drvinfo = macb_get_drvinfo, | |
928 | .nway_reset = macb_nway_reset, | |
929 | .get_link = ethtool_op_get_link, | |
930 | }; | |
931 | ||
932 | static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
933 | { | |
934 | struct macb *bp = netdev_priv(dev); | |
935 | int ret; | |
936 | unsigned long flags; | |
937 | ||
938 | if (!netif_running(dev)) | |
939 | return -EINVAL; | |
940 | ||
941 | spin_lock_irqsave(&bp->lock, flags); | |
942 | ret = generic_mii_ioctl(&bp->mii, if_mii(rq), cmd, NULL); | |
943 | spin_unlock_irqrestore(&bp->lock, flags); | |
944 | ||
945 | return ret; | |
946 | } | |
947 | ||
948 | static ssize_t macb_mii_show(const struct class_device *cd, char *buf, | |
949 | unsigned long addr) | |
950 | { | |
951 | struct net_device *dev = to_net_dev(cd); | |
952 | struct macb *bp = netdev_priv(dev); | |
953 | ssize_t ret = -EINVAL; | |
954 | ||
955 | if (netif_running(dev)) { | |
956 | int value; | |
957 | value = macb_mdio_read(dev, bp->mii.phy_id, addr); | |
958 | ret = sprintf(buf, "0x%04x\n", (uint16_t)value); | |
959 | } | |
960 | ||
961 | return ret; | |
962 | } | |
963 | ||
964 | #define MII_ENTRY(name, addr) \ | |
965 | static ssize_t show_##name(struct class_device *cd, char *buf) \ | |
966 | { \ | |
967 | return macb_mii_show(cd, buf, addr); \ | |
968 | } \ | |
969 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) | |
970 | ||
971 | MII_ENTRY(bmcr, MII_BMCR); | |
972 | MII_ENTRY(bmsr, MII_BMSR); | |
973 | MII_ENTRY(physid1, MII_PHYSID1); | |
974 | MII_ENTRY(physid2, MII_PHYSID2); | |
975 | MII_ENTRY(advertise, MII_ADVERTISE); | |
976 | MII_ENTRY(lpa, MII_LPA); | |
977 | MII_ENTRY(expansion, MII_EXPANSION); | |
978 | ||
979 | static struct attribute *macb_mii_attrs[] = { | |
980 | &class_device_attr_bmcr.attr, | |
981 | &class_device_attr_bmsr.attr, | |
982 | &class_device_attr_physid1.attr, | |
983 | &class_device_attr_physid2.attr, | |
984 | &class_device_attr_advertise.attr, | |
985 | &class_device_attr_lpa.attr, | |
986 | &class_device_attr_expansion.attr, | |
987 | NULL, | |
988 | }; | |
989 | ||
990 | static struct attribute_group macb_mii_group = { | |
991 | .name = "mii", | |
992 | .attrs = macb_mii_attrs, | |
993 | }; | |
994 | ||
995 | static void macb_unregister_sysfs(struct net_device *net) | |
996 | { | |
997 | struct class_device *class_dev = &net->class_dev; | |
998 | ||
999 | sysfs_remove_group(&class_dev->kobj, &macb_mii_group); | |
1000 | } | |
1001 | ||
1002 | static int macb_register_sysfs(struct net_device *net) | |
1003 | { | |
1004 | struct class_device *class_dev = &net->class_dev; | |
1005 | int ret; | |
1006 | ||
1007 | ret = sysfs_create_group(&class_dev->kobj, &macb_mii_group); | |
1008 | if (ret) | |
1009 | printk(KERN_WARNING | |
1010 | "%s: sysfs mii attribute registration failed: %d\n", | |
1011 | net->name, ret); | |
1012 | return ret; | |
1013 | } | |
1014 | static int __devinit macb_probe(struct platform_device *pdev) | |
1015 | { | |
1016 | struct eth_platform_data *pdata; | |
1017 | struct resource *regs; | |
1018 | struct net_device *dev; | |
1019 | struct macb *bp; | |
1020 | unsigned long pclk_hz; | |
1021 | u32 config; | |
1022 | int err = -ENXIO; | |
1023 | ||
1024 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1025 | if (!regs) { | |
1026 | dev_err(&pdev->dev, "no mmio resource defined\n"); | |
1027 | goto err_out; | |
1028 | } | |
1029 | ||
1030 | err = -ENOMEM; | |
1031 | dev = alloc_etherdev(sizeof(*bp)); | |
1032 | if (!dev) { | |
1033 | dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n"); | |
1034 | goto err_out; | |
1035 | } | |
1036 | ||
1037 | SET_MODULE_OWNER(dev); | |
1038 | SET_NETDEV_DEV(dev, &pdev->dev); | |
1039 | ||
1040 | /* TODO: Actually, we have some interesting features... */ | |
1041 | dev->features |= 0; | |
1042 | ||
1043 | bp = netdev_priv(dev); | |
1044 | bp->pdev = pdev; | |
1045 | bp->dev = dev; | |
1046 | ||
1047 | spin_lock_init(&bp->lock); | |
1048 | ||
1049 | bp->pclk = clk_get(&pdev->dev, "pclk"); | |
1050 | if (IS_ERR(bp->pclk)) { | |
1051 | dev_err(&pdev->dev, "failed to get pclk\n"); | |
1052 | goto err_out_free_dev; | |
1053 | } | |
1054 | bp->hclk = clk_get(&pdev->dev, "hclk"); | |
1055 | if (IS_ERR(bp->hclk)) { | |
1056 | dev_err(&pdev->dev, "failed to get hclk\n"); | |
1057 | goto err_out_put_pclk; | |
1058 | } | |
1059 | ||
1060 | clk_enable(bp->pclk); | |
1061 | clk_enable(bp->hclk); | |
1062 | ||
1063 | bp->regs = ioremap(regs->start, regs->end - regs->start + 1); | |
1064 | if (!bp->regs) { | |
1065 | dev_err(&pdev->dev, "failed to map registers, aborting.\n"); | |
1066 | err = -ENOMEM; | |
1067 | goto err_out_disable_clocks; | |
1068 | } | |
1069 | ||
1070 | dev->irq = platform_get_irq(pdev, 0); | |
1071 | err = request_irq(dev->irq, macb_interrupt, SA_SAMPLE_RANDOM, | |
1072 | dev->name, dev); | |
1073 | if (err) { | |
1074 | printk(KERN_ERR | |
1075 | "%s: Unable to request IRQ %d (error %d)\n", | |
1076 | dev->name, dev->irq, err); | |
1077 | goto err_out_iounmap; | |
1078 | } | |
1079 | ||
1080 | dev->open = macb_open; | |
1081 | dev->stop = macb_close; | |
1082 | dev->hard_start_xmit = macb_start_xmit; | |
1083 | dev->get_stats = macb_get_stats; | |
1084 | dev->do_ioctl = macb_ioctl; | |
1085 | dev->poll = macb_poll; | |
1086 | dev->weight = 64; | |
1087 | dev->ethtool_ops = &macb_ethtool_ops; | |
1088 | ||
1089 | dev->base_addr = regs->start; | |
1090 | ||
1091 | INIT_WORK(&bp->periodic_task, macb_periodic_task, bp); | |
1092 | mutex_init(&bp->mdio_mutex); | |
1093 | init_completion(&bp->mdio_complete); | |
1094 | ||
1095 | /* Set MII management clock divider */ | |
1096 | pclk_hz = clk_get_rate(bp->pclk); | |
1097 | if (pclk_hz <= 20000000) | |
1098 | config = MACB_BF(CLK, MACB_CLK_DIV8); | |
1099 | else if (pclk_hz <= 40000000) | |
1100 | config = MACB_BF(CLK, MACB_CLK_DIV16); | |
1101 | else if (pclk_hz <= 80000000) | |
1102 | config = MACB_BF(CLK, MACB_CLK_DIV32); | |
1103 | else | |
1104 | config = MACB_BF(CLK, MACB_CLK_DIV64); | |
1105 | macb_writel(bp, NCFGR, config); | |
1106 | ||
1107 | bp->mii.dev = dev; | |
1108 | bp->mii.mdio_read = macb_mdio_read; | |
1109 | bp->mii.mdio_write = macb_mdio_write; | |
1110 | bp->mii.phy_id_mask = 0x1f; | |
1111 | bp->mii.reg_num_mask = 0x1f; | |
1112 | ||
1113 | macb_get_hwaddr(bp); | |
1114 | err = macb_phy_probe(bp); | |
1115 | if (err) { | |
1116 | dev_err(&pdev->dev, "Failed to detect PHY, aborting.\n"); | |
1117 | goto err_out_free_irq; | |
1118 | } | |
1119 | ||
1120 | pdata = pdev->dev.platform_data; | |
1121 | if (pdata && pdata->is_rmii) | |
1122 | macb_writel(bp, USRIO, 0); | |
1123 | else | |
1124 | macb_writel(bp, USRIO, MACB_BIT(MII)); | |
1125 | ||
1126 | bp->tx_pending = DEF_TX_RING_PENDING; | |
1127 | ||
1128 | err = register_netdev(dev); | |
1129 | if (err) { | |
1130 | dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); | |
1131 | goto err_out_free_irq; | |
1132 | } | |
1133 | ||
1134 | platform_set_drvdata(pdev, dev); | |
1135 | ||
1136 | macb_register_sysfs(dev); | |
1137 | ||
1138 | printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d " | |
1139 | "(%02x:%02x:%02x:%02x:%02x:%02x)\n", | |
1140 | dev->name, dev->base_addr, dev->irq, | |
1141 | dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], | |
1142 | dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); | |
1143 | ||
1144 | return 0; | |
1145 | ||
1146 | err_out_free_irq: | |
1147 | free_irq(dev->irq, dev); | |
1148 | err_out_iounmap: | |
1149 | iounmap(bp->regs); | |
1150 | err_out_disable_clocks: | |
1151 | clk_disable(bp->hclk); | |
1152 | clk_disable(bp->pclk); | |
1153 | clk_put(bp->hclk); | |
1154 | err_out_put_pclk: | |
1155 | clk_put(bp->pclk); | |
1156 | err_out_free_dev: | |
1157 | free_netdev(dev); | |
1158 | err_out: | |
1159 | platform_set_drvdata(pdev, NULL); | |
1160 | return err; | |
1161 | } | |
1162 | ||
1163 | static int __devexit macb_remove(struct platform_device *pdev) | |
1164 | { | |
1165 | struct net_device *dev; | |
1166 | struct macb *bp; | |
1167 | ||
1168 | dev = platform_get_drvdata(pdev); | |
1169 | ||
1170 | if (dev) { | |
1171 | bp = netdev_priv(dev); | |
1172 | macb_unregister_sysfs(dev); | |
1173 | unregister_netdev(dev); | |
1174 | free_irq(dev->irq, dev); | |
1175 | iounmap(bp->regs); | |
1176 | clk_disable(bp->hclk); | |
1177 | clk_disable(bp->pclk); | |
1178 | clk_put(bp->hclk); | |
1179 | clk_put(bp->pclk); | |
1180 | free_netdev(dev); | |
1181 | platform_set_drvdata(pdev, NULL); | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static struct platform_driver macb_driver = { | |
1188 | .probe = macb_probe, | |
1189 | .remove = __devexit_p(macb_remove), | |
1190 | .driver = { | |
1191 | .name = "macb", | |
1192 | }, | |
1193 | }; | |
1194 | ||
1195 | static int __init macb_init(void) | |
1196 | { | |
1197 | return platform_driver_register(&macb_driver); | |
1198 | } | |
1199 | ||
1200 | static void __exit macb_exit(void) | |
1201 | { | |
1202 | platform_driver_unregister(&macb_driver); | |
1203 | } | |
1204 | ||
1205 | module_init(macb_init); | |
1206 | module_exit(macb_exit); | |
1207 | ||
1208 | MODULE_LICENSE("GPL"); | |
1209 | MODULE_DESCRIPTION("Atmel MACB Ethernet driver"); | |
1210 | MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>"); |