Commit | Line | Data |
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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 | ||
89e5785f HS |
30 | #define RX_BUFFER_SIZE 128 |
31 | #define RX_RING_SIZE 512 | |
32 | #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE) | |
33 | ||
34 | /* Make the IP header word-aligned (the ethernet header is 14 bytes) */ | |
35 | #define RX_OFFSET 2 | |
36 | ||
37 | #define TX_RING_SIZE 128 | |
38 | #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1) | |
39 | #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE) | |
40 | ||
41 | #define TX_RING_GAP(bp) \ | |
42 | (TX_RING_SIZE - (bp)->tx_pending) | |
43 | #define TX_BUFFS_AVAIL(bp) \ | |
44 | (((bp)->tx_tail <= (bp)->tx_head) ? \ | |
45 | (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \ | |
46 | (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp)) | |
47 | #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1)) | |
48 | ||
49 | #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1)) | |
50 | ||
51 | /* minimum number of free TX descriptors before waking up TX process */ | |
52 | #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4) | |
53 | ||
54 | #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \ | |
55 | | MACB_BIT(ISR_ROVR)) | |
56 | ||
57 | static void __macb_set_hwaddr(struct macb *bp) | |
58 | { | |
59 | u32 bottom; | |
60 | u16 top; | |
61 | ||
62 | bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); | |
63 | macb_writel(bp, SA1B, bottom); | |
64 | top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); | |
65 | macb_writel(bp, SA1T, top); | |
66 | } | |
67 | ||
68 | static void __init macb_get_hwaddr(struct macb *bp) | |
69 | { | |
70 | u32 bottom; | |
71 | u16 top; | |
72 | u8 addr[6]; | |
73 | ||
74 | bottom = macb_readl(bp, SA1B); | |
75 | top = macb_readl(bp, SA1T); | |
76 | ||
77 | addr[0] = bottom & 0xff; | |
78 | addr[1] = (bottom >> 8) & 0xff; | |
79 | addr[2] = (bottom >> 16) & 0xff; | |
80 | addr[3] = (bottom >> 24) & 0xff; | |
81 | addr[4] = top & 0xff; | |
82 | addr[5] = (top >> 8) & 0xff; | |
83 | ||
84 | if (is_valid_ether_addr(addr)) | |
85 | memcpy(bp->dev->dev_addr, addr, sizeof(addr)); | |
86 | } | |
87 | ||
88 | static void macb_enable_mdio(struct macb *bp) | |
89 | { | |
90 | unsigned long flags; | |
91 | u32 reg; | |
92 | ||
93 | spin_lock_irqsave(&bp->lock, flags); | |
94 | reg = macb_readl(bp, NCR); | |
95 | reg |= MACB_BIT(MPE); | |
96 | macb_writel(bp, NCR, reg); | |
97 | macb_writel(bp, IER, MACB_BIT(MFD)); | |
98 | spin_unlock_irqrestore(&bp->lock, flags); | |
99 | } | |
100 | ||
101 | static void macb_disable_mdio(struct macb *bp) | |
102 | { | |
103 | unsigned long flags; | |
104 | u32 reg; | |
105 | ||
106 | spin_lock_irqsave(&bp->lock, flags); | |
107 | reg = macb_readl(bp, NCR); | |
108 | reg &= ~MACB_BIT(MPE); | |
109 | macb_writel(bp, NCR, reg); | |
110 | macb_writel(bp, IDR, MACB_BIT(MFD)); | |
111 | spin_unlock_irqrestore(&bp->lock, flags); | |
112 | } | |
113 | ||
114 | static int macb_mdio_read(struct net_device *dev, int phy_id, int location) | |
115 | { | |
116 | struct macb *bp = netdev_priv(dev); | |
117 | int value; | |
118 | ||
119 | mutex_lock(&bp->mdio_mutex); | |
120 | ||
121 | macb_enable_mdio(bp); | |
122 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | |
123 | | MACB_BF(RW, MACB_MAN_READ) | |
124 | | MACB_BF(PHYA, phy_id) | |
125 | | MACB_BF(REGA, location) | |
126 | | MACB_BF(CODE, MACB_MAN_CODE))); | |
127 | ||
128 | wait_for_completion(&bp->mdio_complete); | |
129 | ||
130 | value = MACB_BFEXT(DATA, macb_readl(bp, MAN)); | |
131 | macb_disable_mdio(bp); | |
132 | mutex_unlock(&bp->mdio_mutex); | |
133 | ||
134 | return value; | |
135 | } | |
136 | ||
137 | static void macb_mdio_write(struct net_device *dev, int phy_id, | |
138 | int location, int val) | |
139 | { | |
140 | struct macb *bp = netdev_priv(dev); | |
141 | ||
142 | dev_dbg(&bp->pdev->dev, "mdio_write %02x:%02x <- %04x\n", | |
143 | phy_id, location, val); | |
144 | ||
145 | mutex_lock(&bp->mdio_mutex); | |
146 | macb_enable_mdio(bp); | |
147 | ||
148 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) | |
149 | | MACB_BF(RW, MACB_MAN_WRITE) | |
150 | | MACB_BF(PHYA, phy_id) | |
151 | | MACB_BF(REGA, location) | |
152 | | MACB_BF(CODE, MACB_MAN_CODE) | |
153 | | MACB_BF(DATA, val))); | |
154 | ||
155 | wait_for_completion(&bp->mdio_complete); | |
156 | ||
157 | macb_disable_mdio(bp); | |
158 | mutex_unlock(&bp->mdio_mutex); | |
159 | } | |
160 | ||
161 | static int macb_phy_probe(struct macb *bp) | |
162 | { | |
163 | int phy_address; | |
164 | u16 phyid1, phyid2; | |
165 | ||
166 | for (phy_address = 0; phy_address < 32; phy_address++) { | |
167 | phyid1 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID1); | |
168 | phyid2 = macb_mdio_read(bp->dev, phy_address, MII_PHYSID2); | |
169 | ||
170 | if (phyid1 != 0xffff && phyid1 != 0x0000 | |
171 | && phyid2 != 0xffff && phyid2 != 0x0000) | |
172 | break; | |
173 | } | |
174 | ||
175 | if (phy_address == 32) | |
176 | return -ENODEV; | |
177 | ||
178 | dev_info(&bp->pdev->dev, | |
179 | "detected PHY at address %d (ID %04x:%04x)\n", | |
180 | phy_address, phyid1, phyid2); | |
181 | ||
182 | bp->mii.phy_id = phy_address; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static void macb_set_media(struct macb *bp, int media) | |
187 | { | |
188 | u32 reg; | |
189 | ||
190 | spin_lock_irq(&bp->lock); | |
191 | reg = macb_readl(bp, NCFGR); | |
192 | reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); | |
193 | if (media & (ADVERTISE_100HALF | ADVERTISE_100FULL)) | |
194 | reg |= MACB_BIT(SPD); | |
195 | if (media & ADVERTISE_FULL) | |
196 | reg |= MACB_BIT(FD); | |
197 | macb_writel(bp, NCFGR, reg); | |
198 | spin_unlock_irq(&bp->lock); | |
199 | } | |
200 | ||
201 | static void macb_check_media(struct macb *bp, int ok_to_print, int init_media) | |
202 | { | |
203 | struct mii_if_info *mii = &bp->mii; | |
204 | unsigned int old_carrier, new_carrier; | |
205 | int advertise, lpa, media, duplex; | |
206 | ||
207 | /* if forced media, go no further */ | |
208 | if (mii->force_media) | |
209 | return; | |
210 | ||
211 | /* check current and old link status */ | |
212 | old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0; | |
213 | new_carrier = (unsigned int) mii_link_ok(mii); | |
214 | ||
215 | /* if carrier state did not change, assume nothing else did */ | |
216 | if (!init_media && old_carrier == new_carrier) | |
217 | return; | |
218 | ||
219 | /* no carrier, nothing much to do */ | |
220 | if (!new_carrier) { | |
221 | netif_carrier_off(mii->dev); | |
222 | printk(KERN_INFO "%s: link down\n", mii->dev->name); | |
223 | return; | |
224 | } | |
225 | ||
226 | /* | |
227 | * we have carrier, see who's on the other end | |
228 | */ | |
229 | netif_carrier_on(mii->dev); | |
230 | ||
231 | /* get MII advertise and LPA values */ | |
232 | if (!init_media && mii->advertising) { | |
233 | advertise = mii->advertising; | |
234 | } else { | |
235 | advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE); | |
236 | mii->advertising = advertise; | |
237 | } | |
238 | lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); | |
239 | ||
240 | /* figure out media and duplex from advertise and LPA values */ | |
241 | media = mii_nway_result(lpa & advertise); | |
242 | duplex = (media & ADVERTISE_FULL) ? 1 : 0; | |
243 | ||
244 | if (ok_to_print) | |
245 | printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n", | |
246 | mii->dev->name, | |
247 | media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10", | |
248 | duplex ? "full" : "half", lpa); | |
249 | ||
250 | mii->full_duplex = duplex; | |
251 | ||
252 | /* Let the MAC know about the new link state */ | |
253 | macb_set_media(bp, media); | |
254 | } | |
255 | ||
256 | static void macb_update_stats(struct macb *bp) | |
257 | { | |
258 | u32 __iomem *reg = bp->regs + MACB_PFR; | |
259 | u32 *p = &bp->hw_stats.rx_pause_frames; | |
260 | u32 *end = &bp->hw_stats.tx_pause_frames + 1; | |
261 | ||
262 | WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); | |
263 | ||
264 | for(; p < end; p++, reg++) | |
0f0d84e5 | 265 | *p += __raw_readl(reg); |
89e5785f HS |
266 | } |
267 | ||
d836cae4 | 268 | static void macb_periodic_task(struct work_struct *work) |
89e5785f | 269 | { |
d836cae4 | 270 | struct macb *bp = container_of(work, struct macb, periodic_task.work); |
89e5785f HS |
271 | |
272 | macb_update_stats(bp); | |
273 | macb_check_media(bp, 1, 0); | |
274 | ||
275 | schedule_delayed_work(&bp->periodic_task, HZ); | |
276 | } | |
277 | ||
278 | static void macb_tx(struct macb *bp) | |
279 | { | |
280 | unsigned int tail; | |
281 | unsigned int head; | |
282 | u32 status; | |
283 | ||
284 | status = macb_readl(bp, TSR); | |
285 | macb_writel(bp, TSR, status); | |
286 | ||
287 | dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n", | |
288 | (unsigned long)status); | |
289 | ||
290 | if (status & MACB_BIT(UND)) { | |
291 | printk(KERN_ERR "%s: TX underrun, resetting buffers\n", | |
292 | bp->dev->name); | |
293 | bp->tx_head = bp->tx_tail = 0; | |
294 | } | |
295 | ||
296 | if (!(status & MACB_BIT(COMP))) | |
297 | /* | |
298 | * This may happen when a buffer becomes complete | |
299 | * between reading the ISR and scanning the | |
300 | * descriptors. Nothing to worry about. | |
301 | */ | |
302 | return; | |
303 | ||
304 | head = bp->tx_head; | |
305 | for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { | |
306 | struct ring_info *rp = &bp->tx_skb[tail]; | |
307 | struct sk_buff *skb = rp->skb; | |
308 | u32 bufstat; | |
309 | ||
310 | BUG_ON(skb == NULL); | |
311 | ||
312 | rmb(); | |
313 | bufstat = bp->tx_ring[tail].ctrl; | |
314 | ||
315 | if (!(bufstat & MACB_BIT(TX_USED))) | |
316 | break; | |
317 | ||
318 | dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n", | |
319 | tail, skb->data); | |
320 | dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len, | |
321 | DMA_TO_DEVICE); | |
322 | bp->stats.tx_packets++; | |
323 | bp->stats.tx_bytes += skb->len; | |
324 | rp->skb = NULL; | |
325 | dev_kfree_skb_irq(skb); | |
326 | } | |
327 | ||
328 | bp->tx_tail = tail; | |
329 | if (netif_queue_stopped(bp->dev) && | |
330 | TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH) | |
331 | netif_wake_queue(bp->dev); | |
332 | } | |
333 | ||
334 | static int macb_rx_frame(struct macb *bp, unsigned int first_frag, | |
335 | unsigned int last_frag) | |
336 | { | |
337 | unsigned int len; | |
338 | unsigned int frag; | |
339 | unsigned int offset = 0; | |
340 | struct sk_buff *skb; | |
341 | ||
342 | len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl); | |
343 | ||
344 | dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n", | |
345 | first_frag, last_frag, len); | |
346 | ||
347 | skb = dev_alloc_skb(len + RX_OFFSET); | |
348 | if (!skb) { | |
349 | bp->stats.rx_dropped++; | |
350 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { | |
351 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
352 | if (frag == last_frag) | |
353 | break; | |
354 | } | |
355 | wmb(); | |
356 | return 1; | |
357 | } | |
358 | ||
359 | skb_reserve(skb, RX_OFFSET); | |
89e5785f HS |
360 | skb->ip_summed = CHECKSUM_NONE; |
361 | skb_put(skb, len); | |
362 | ||
363 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { | |
364 | unsigned int frag_len = RX_BUFFER_SIZE; | |
365 | ||
366 | if (offset + frag_len > len) { | |
367 | BUG_ON(frag != last_frag); | |
368 | frag_len = len - offset; | |
369 | } | |
27d7ff46 ACM |
370 | skb_copy_to_linear_data_offset(skb, offset, |
371 | (bp->rx_buffers + | |
372 | (RX_BUFFER_SIZE * frag)), | |
373 | frag_len); | |
89e5785f HS |
374 | offset += RX_BUFFER_SIZE; |
375 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
376 | wmb(); | |
377 | ||
378 | if (frag == last_frag) | |
379 | break; | |
380 | } | |
381 | ||
382 | skb->protocol = eth_type_trans(skb, bp->dev); | |
383 | ||
384 | bp->stats.rx_packets++; | |
385 | bp->stats.rx_bytes += len; | |
386 | bp->dev->last_rx = jiffies; | |
387 | dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n", | |
388 | skb->len, skb->csum); | |
389 | netif_receive_skb(skb); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | /* Mark DMA descriptors from begin up to and not including end as unused */ | |
395 | static void discard_partial_frame(struct macb *bp, unsigned int begin, | |
396 | unsigned int end) | |
397 | { | |
398 | unsigned int frag; | |
399 | ||
400 | for (frag = begin; frag != end; frag = NEXT_RX(frag)) | |
401 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); | |
402 | wmb(); | |
403 | ||
404 | /* | |
405 | * When this happens, the hardware stats registers for | |
406 | * whatever caused this is updated, so we don't have to record | |
407 | * anything. | |
408 | */ | |
409 | } | |
410 | ||
411 | static int macb_rx(struct macb *bp, int budget) | |
412 | { | |
413 | int received = 0; | |
414 | unsigned int tail = bp->rx_tail; | |
415 | int first_frag = -1; | |
416 | ||
417 | for (; budget > 0; tail = NEXT_RX(tail)) { | |
418 | u32 addr, ctrl; | |
419 | ||
420 | rmb(); | |
421 | addr = bp->rx_ring[tail].addr; | |
422 | ctrl = bp->rx_ring[tail].ctrl; | |
423 | ||
424 | if (!(addr & MACB_BIT(RX_USED))) | |
425 | break; | |
426 | ||
427 | if (ctrl & MACB_BIT(RX_SOF)) { | |
428 | if (first_frag != -1) | |
429 | discard_partial_frame(bp, first_frag, tail); | |
430 | first_frag = tail; | |
431 | } | |
432 | ||
433 | if (ctrl & MACB_BIT(RX_EOF)) { | |
434 | int dropped; | |
435 | BUG_ON(first_frag == -1); | |
436 | ||
437 | dropped = macb_rx_frame(bp, first_frag, tail); | |
438 | first_frag = -1; | |
439 | if (!dropped) { | |
440 | received++; | |
441 | budget--; | |
442 | } | |
443 | } | |
444 | } | |
445 | ||
446 | if (first_frag != -1) | |
447 | bp->rx_tail = first_frag; | |
448 | else | |
449 | bp->rx_tail = tail; | |
450 | ||
451 | return received; | |
452 | } | |
453 | ||
454 | static int macb_poll(struct net_device *dev, int *budget) | |
455 | { | |
456 | struct macb *bp = netdev_priv(dev); | |
457 | int orig_budget, work_done, retval = 0; | |
458 | u32 status; | |
459 | ||
460 | status = macb_readl(bp, RSR); | |
461 | macb_writel(bp, RSR, status); | |
462 | ||
463 | if (!status) { | |
464 | /* | |
465 | * This may happen if an interrupt was pending before | |
466 | * this function was called last time, and no packets | |
467 | * have been received since. | |
468 | */ | |
469 | netif_rx_complete(dev); | |
470 | goto out; | |
471 | } | |
472 | ||
473 | dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n", | |
474 | (unsigned long)status, *budget); | |
475 | ||
476 | if (!(status & MACB_BIT(REC))) { | |
477 | dev_warn(&bp->pdev->dev, | |
478 | "No RX buffers complete, status = %02lx\n", | |
479 | (unsigned long)status); | |
480 | netif_rx_complete(dev); | |
481 | goto out; | |
482 | } | |
483 | ||
484 | orig_budget = *budget; | |
485 | if (orig_budget > dev->quota) | |
486 | orig_budget = dev->quota; | |
487 | ||
488 | work_done = macb_rx(bp, orig_budget); | |
489 | if (work_done < orig_budget) { | |
490 | netif_rx_complete(dev); | |
491 | retval = 0; | |
492 | } else { | |
493 | retval = 1; | |
494 | } | |
495 | ||
496 | /* | |
497 | * We've done what we can to clean the buffers. Make sure we | |
498 | * get notified when new packets arrive. | |
499 | */ | |
500 | out: | |
501 | macb_writel(bp, IER, MACB_RX_INT_FLAGS); | |
502 | ||
503 | /* TODO: Handle errors */ | |
504 | ||
505 | return retval; | |
506 | } | |
507 | ||
508 | static irqreturn_t macb_interrupt(int irq, void *dev_id) | |
509 | { | |
510 | struct net_device *dev = dev_id; | |
511 | struct macb *bp = netdev_priv(dev); | |
512 | u32 status; | |
513 | ||
514 | status = macb_readl(bp, ISR); | |
515 | ||
516 | if (unlikely(!status)) | |
517 | return IRQ_NONE; | |
518 | ||
519 | spin_lock(&bp->lock); | |
520 | ||
521 | while (status) { | |
522 | if (status & MACB_BIT(MFD)) | |
523 | complete(&bp->mdio_complete); | |
524 | ||
525 | /* close possible race with dev_close */ | |
526 | if (unlikely(!netif_running(dev))) { | |
527 | macb_writel(bp, IDR, ~0UL); | |
528 | break; | |
529 | } | |
530 | ||
531 | if (status & MACB_RX_INT_FLAGS) { | |
532 | if (netif_rx_schedule_prep(dev)) { | |
533 | /* | |
534 | * There's no point taking any more interrupts | |
535 | * until we have processed the buffers | |
536 | */ | |
537 | macb_writel(bp, IDR, MACB_RX_INT_FLAGS); | |
538 | dev_dbg(&bp->pdev->dev, "scheduling RX softirq\n"); | |
539 | __netif_rx_schedule(dev); | |
540 | } | |
541 | } | |
542 | ||
543 | if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND))) | |
544 | macb_tx(bp); | |
545 | ||
546 | /* | |
547 | * Link change detection isn't possible with RMII, so we'll | |
548 | * add that if/when we get our hands on a full-blown MII PHY. | |
549 | */ | |
550 | ||
551 | if (status & MACB_BIT(HRESP)) { | |
552 | /* | |
553 | * TODO: Reset the hardware, and maybe move the printk | |
554 | * to a lower-priority context as well (work queue?) | |
555 | */ | |
556 | printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n", | |
557 | dev->name); | |
558 | } | |
559 | ||
560 | status = macb_readl(bp, ISR); | |
561 | } | |
562 | ||
563 | spin_unlock(&bp->lock); | |
564 | ||
565 | return IRQ_HANDLED; | |
566 | } | |
567 | ||
568 | static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
569 | { | |
570 | struct macb *bp = netdev_priv(dev); | |
571 | dma_addr_t mapping; | |
572 | unsigned int len, entry; | |
573 | u32 ctrl; | |
574 | ||
575 | #ifdef DEBUG | |
576 | int i; | |
577 | dev_dbg(&bp->pdev->dev, | |
578 | "start_xmit: len %u head %p data %p tail %p end %p\n", | |
27a884dc | 579 | skb->len, skb->head, skb->data, |
4305b541 | 580 | skb_tail_pointer(skb), skb_end_pointer(skb)); |
89e5785f HS |
581 | dev_dbg(&bp->pdev->dev, |
582 | "data:"); | |
583 | for (i = 0; i < 16; i++) | |
584 | printk(" %02x", (unsigned int)skb->data[i]); | |
585 | printk("\n"); | |
586 | #endif | |
587 | ||
588 | len = skb->len; | |
589 | spin_lock_irq(&bp->lock); | |
590 | ||
591 | /* This is a hard error, log it. */ | |
592 | if (TX_BUFFS_AVAIL(bp) < 1) { | |
593 | netif_stop_queue(dev); | |
594 | spin_unlock_irq(&bp->lock); | |
595 | dev_err(&bp->pdev->dev, | |
596 | "BUG! Tx Ring full when queue awake!\n"); | |
597 | dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n", | |
598 | bp->tx_head, bp->tx_tail); | |
599 | return 1; | |
600 | } | |
601 | ||
602 | entry = bp->tx_head; | |
603 | dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry); | |
604 | mapping = dma_map_single(&bp->pdev->dev, skb->data, | |
605 | len, DMA_TO_DEVICE); | |
606 | bp->tx_skb[entry].skb = skb; | |
607 | bp->tx_skb[entry].mapping = mapping; | |
608 | dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n", | |
609 | skb->data, (unsigned long)mapping); | |
610 | ||
611 | ctrl = MACB_BF(TX_FRMLEN, len); | |
612 | ctrl |= MACB_BIT(TX_LAST); | |
613 | if (entry == (TX_RING_SIZE - 1)) | |
614 | ctrl |= MACB_BIT(TX_WRAP); | |
615 | ||
616 | bp->tx_ring[entry].addr = mapping; | |
617 | bp->tx_ring[entry].ctrl = ctrl; | |
618 | wmb(); | |
619 | ||
620 | entry = NEXT_TX(entry); | |
621 | bp->tx_head = entry; | |
622 | ||
623 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); | |
624 | ||
625 | if (TX_BUFFS_AVAIL(bp) < 1) | |
626 | netif_stop_queue(dev); | |
627 | ||
628 | spin_unlock_irq(&bp->lock); | |
629 | ||
630 | dev->trans_start = jiffies; | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | static void macb_free_consistent(struct macb *bp) | |
636 | { | |
637 | if (bp->tx_skb) { | |
638 | kfree(bp->tx_skb); | |
639 | bp->tx_skb = NULL; | |
640 | } | |
641 | if (bp->rx_ring) { | |
642 | dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES, | |
643 | bp->rx_ring, bp->rx_ring_dma); | |
644 | bp->rx_ring = NULL; | |
645 | } | |
646 | if (bp->tx_ring) { | |
647 | dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES, | |
648 | bp->tx_ring, bp->tx_ring_dma); | |
649 | bp->tx_ring = NULL; | |
650 | } | |
651 | if (bp->rx_buffers) { | |
652 | dma_free_coherent(&bp->pdev->dev, | |
653 | RX_RING_SIZE * RX_BUFFER_SIZE, | |
654 | bp->rx_buffers, bp->rx_buffers_dma); | |
655 | bp->rx_buffers = NULL; | |
656 | } | |
657 | } | |
658 | ||
659 | static int macb_alloc_consistent(struct macb *bp) | |
660 | { | |
661 | int size; | |
662 | ||
663 | size = TX_RING_SIZE * sizeof(struct ring_info); | |
664 | bp->tx_skb = kmalloc(size, GFP_KERNEL); | |
665 | if (!bp->tx_skb) | |
666 | goto out_err; | |
667 | ||
668 | size = RX_RING_BYTES; | |
669 | bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
670 | &bp->rx_ring_dma, GFP_KERNEL); | |
671 | if (!bp->rx_ring) | |
672 | goto out_err; | |
673 | dev_dbg(&bp->pdev->dev, | |
674 | "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", | |
675 | size, (unsigned long)bp->rx_ring_dma, bp->rx_ring); | |
676 | ||
677 | size = TX_RING_BYTES; | |
678 | bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, | |
679 | &bp->tx_ring_dma, GFP_KERNEL); | |
680 | if (!bp->tx_ring) | |
681 | goto out_err; | |
682 | dev_dbg(&bp->pdev->dev, | |
683 | "Allocated TX ring of %d bytes at %08lx (mapped %p)\n", | |
684 | size, (unsigned long)bp->tx_ring_dma, bp->tx_ring); | |
685 | ||
686 | size = RX_RING_SIZE * RX_BUFFER_SIZE; | |
687 | bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, | |
688 | &bp->rx_buffers_dma, GFP_KERNEL); | |
689 | if (!bp->rx_buffers) | |
690 | goto out_err; | |
691 | dev_dbg(&bp->pdev->dev, | |
692 | "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", | |
693 | size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers); | |
694 | ||
695 | return 0; | |
696 | ||
697 | out_err: | |
698 | macb_free_consistent(bp); | |
699 | return -ENOMEM; | |
700 | } | |
701 | ||
702 | static void macb_init_rings(struct macb *bp) | |
703 | { | |
704 | int i; | |
705 | dma_addr_t addr; | |
706 | ||
707 | addr = bp->rx_buffers_dma; | |
708 | for (i = 0; i < RX_RING_SIZE; i++) { | |
709 | bp->rx_ring[i].addr = addr; | |
710 | bp->rx_ring[i].ctrl = 0; | |
711 | addr += RX_BUFFER_SIZE; | |
712 | } | |
713 | bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP); | |
714 | ||
715 | for (i = 0; i < TX_RING_SIZE; i++) { | |
716 | bp->tx_ring[i].addr = 0; | |
717 | bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); | |
718 | } | |
719 | bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); | |
720 | ||
721 | bp->rx_tail = bp->tx_head = bp->tx_tail = 0; | |
722 | } | |
723 | ||
724 | static void macb_reset_hw(struct macb *bp) | |
725 | { | |
726 | /* Make sure we have the write buffer for ourselves */ | |
727 | wmb(); | |
728 | ||
729 | /* | |
730 | * Disable RX and TX (XXX: Should we halt the transmission | |
731 | * more gracefully?) | |
732 | */ | |
733 | macb_writel(bp, NCR, 0); | |
734 | ||
735 | /* Clear the stats registers (XXX: Update stats first?) */ | |
736 | macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); | |
737 | ||
738 | /* Clear all status flags */ | |
739 | macb_writel(bp, TSR, ~0UL); | |
740 | macb_writel(bp, RSR, ~0UL); | |
741 | ||
742 | /* Disable all interrupts */ | |
743 | macb_writel(bp, IDR, ~0UL); | |
744 | macb_readl(bp, ISR); | |
745 | } | |
746 | ||
747 | static void macb_init_hw(struct macb *bp) | |
748 | { | |
749 | u32 config; | |
750 | ||
751 | macb_reset_hw(bp); | |
752 | __macb_set_hwaddr(bp); | |
753 | ||
754 | config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L); | |
755 | config |= MACB_BIT(PAE); /* PAuse Enable */ | |
756 | config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ | |
757 | if (bp->dev->flags & IFF_PROMISC) | |
758 | config |= MACB_BIT(CAF); /* Copy All Frames */ | |
759 | if (!(bp->dev->flags & IFF_BROADCAST)) | |
760 | config |= MACB_BIT(NBC); /* No BroadCast */ | |
761 | macb_writel(bp, NCFGR, config); | |
762 | ||
763 | /* Initialize TX and RX buffers */ | |
764 | macb_writel(bp, RBQP, bp->rx_ring_dma); | |
765 | macb_writel(bp, TBQP, bp->tx_ring_dma); | |
766 | ||
767 | /* Enable TX and RX */ | |
768 | macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE)); | |
769 | ||
770 | /* Enable interrupts */ | |
771 | macb_writel(bp, IER, (MACB_BIT(RCOMP) | |
772 | | MACB_BIT(RXUBR) | |
773 | | MACB_BIT(ISR_TUND) | |
774 | | MACB_BIT(ISR_RLE) | |
775 | | MACB_BIT(TXERR) | |
776 | | MACB_BIT(TCOMP) | |
777 | | MACB_BIT(ISR_ROVR) | |
778 | | MACB_BIT(HRESP))); | |
779 | } | |
780 | ||
781 | static void macb_init_phy(struct net_device *dev) | |
782 | { | |
783 | struct macb *bp = netdev_priv(dev); | |
784 | ||
785 | /* Set some reasonable default settings */ | |
786 | macb_mdio_write(dev, bp->mii.phy_id, MII_ADVERTISE, | |
787 | ADVERTISE_CSMA | ADVERTISE_ALL); | |
788 | macb_mdio_write(dev, bp->mii.phy_id, MII_BMCR, | |
789 | (BMCR_SPEED100 | BMCR_ANENABLE | |
790 | | BMCR_ANRESTART | BMCR_FULLDPLX)); | |
791 | } | |
792 | ||
793 | static int macb_open(struct net_device *dev) | |
794 | { | |
795 | struct macb *bp = netdev_priv(dev); | |
796 | int err; | |
797 | ||
798 | dev_dbg(&bp->pdev->dev, "open\n"); | |
799 | ||
800 | if (!is_valid_ether_addr(dev->dev_addr)) | |
801 | return -EADDRNOTAVAIL; | |
802 | ||
803 | err = macb_alloc_consistent(bp); | |
804 | if (err) { | |
805 | printk(KERN_ERR | |
806 | "%s: Unable to allocate DMA memory (error %d)\n", | |
807 | dev->name, err); | |
808 | return err; | |
809 | } | |
810 | ||
811 | macb_init_rings(bp); | |
812 | macb_init_hw(bp); | |
813 | macb_init_phy(dev); | |
814 | ||
815 | macb_check_media(bp, 1, 1); | |
816 | netif_start_queue(dev); | |
817 | ||
818 | schedule_delayed_work(&bp->periodic_task, HZ); | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
823 | static int macb_close(struct net_device *dev) | |
824 | { | |
825 | struct macb *bp = netdev_priv(dev); | |
826 | unsigned long flags; | |
827 | ||
828 | cancel_rearming_delayed_work(&bp->periodic_task); | |
829 | ||
830 | netif_stop_queue(dev); | |
831 | ||
832 | spin_lock_irqsave(&bp->lock, flags); | |
833 | macb_reset_hw(bp); | |
834 | netif_carrier_off(dev); | |
835 | spin_unlock_irqrestore(&bp->lock, flags); | |
836 | ||
837 | macb_free_consistent(bp); | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | static struct net_device_stats *macb_get_stats(struct net_device *dev) | |
843 | { | |
844 | struct macb *bp = netdev_priv(dev); | |
845 | struct net_device_stats *nstat = &bp->stats; | |
846 | struct macb_stats *hwstat = &bp->hw_stats; | |
847 | ||
848 | /* Convert HW stats into netdevice stats */ | |
849 | nstat->rx_errors = (hwstat->rx_fcs_errors + | |
850 | hwstat->rx_align_errors + | |
851 | hwstat->rx_resource_errors + | |
852 | hwstat->rx_overruns + | |
853 | hwstat->rx_oversize_pkts + | |
854 | hwstat->rx_jabbers + | |
855 | hwstat->rx_undersize_pkts + | |
856 | hwstat->sqe_test_errors + | |
857 | hwstat->rx_length_mismatch); | |
858 | nstat->tx_errors = (hwstat->tx_late_cols + | |
859 | hwstat->tx_excessive_cols + | |
860 | hwstat->tx_underruns + | |
861 | hwstat->tx_carrier_errors); | |
862 | nstat->collisions = (hwstat->tx_single_cols + | |
863 | hwstat->tx_multiple_cols + | |
864 | hwstat->tx_excessive_cols); | |
865 | nstat->rx_length_errors = (hwstat->rx_oversize_pkts + | |
866 | hwstat->rx_jabbers + | |
867 | hwstat->rx_undersize_pkts + | |
868 | hwstat->rx_length_mismatch); | |
869 | nstat->rx_over_errors = hwstat->rx_resource_errors; | |
870 | nstat->rx_crc_errors = hwstat->rx_fcs_errors; | |
871 | nstat->rx_frame_errors = hwstat->rx_align_errors; | |
872 | nstat->rx_fifo_errors = hwstat->rx_overruns; | |
873 | /* XXX: What does "missed" mean? */ | |
874 | nstat->tx_aborted_errors = hwstat->tx_excessive_cols; | |
875 | nstat->tx_carrier_errors = hwstat->tx_carrier_errors; | |
876 | nstat->tx_fifo_errors = hwstat->tx_underruns; | |
877 | /* Don't know about heartbeat or window errors... */ | |
878 | ||
879 | return nstat; | |
880 | } | |
881 | ||
882 | static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
883 | { | |
884 | struct macb *bp = netdev_priv(dev); | |
89e5785f | 885 | |
140e807d | 886 | return mii_ethtool_gset(&bp->mii, cmd); |
89e5785f HS |
887 | } |
888 | ||
889 | static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
890 | { | |
891 | struct macb *bp = netdev_priv(dev); | |
89e5785f | 892 | |
140e807d | 893 | return mii_ethtool_sset(&bp->mii, cmd); |
89e5785f HS |
894 | } |
895 | ||
896 | static void macb_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
897 | { | |
898 | struct macb *bp = netdev_priv(dev); | |
899 | ||
900 | strcpy(info->driver, bp->pdev->dev.driver->name); | |
901 | strcpy(info->version, "$Revision: 1.14 $"); | |
902 | strcpy(info->bus_info, bp->pdev->dev.bus_id); | |
903 | } | |
904 | ||
905 | static int macb_nway_reset(struct net_device *dev) | |
906 | { | |
907 | struct macb *bp = netdev_priv(dev); | |
908 | return mii_nway_restart(&bp->mii); | |
909 | } | |
910 | ||
911 | static struct ethtool_ops macb_ethtool_ops = { | |
912 | .get_settings = macb_get_settings, | |
913 | .set_settings = macb_set_settings, | |
914 | .get_drvinfo = macb_get_drvinfo, | |
915 | .nway_reset = macb_nway_reset, | |
916 | .get_link = ethtool_op_get_link, | |
917 | }; | |
918 | ||
919 | static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
920 | { | |
921 | struct macb *bp = netdev_priv(dev); | |
89e5785f HS |
922 | |
923 | if (!netif_running(dev)) | |
924 | return -EINVAL; | |
925 | ||
140e807d | 926 | return generic_mii_ioctl(&bp->mii, if_mii(rq), cmd, NULL); |
89e5785f HS |
927 | } |
928 | ||
43cb76d9 | 929 | static ssize_t macb_mii_show(const struct device *_dev, char *buf, |
89e5785f HS |
930 | unsigned long addr) |
931 | { | |
43cb76d9 | 932 | struct net_device *dev = to_net_dev(_dev); |
89e5785f HS |
933 | struct macb *bp = netdev_priv(dev); |
934 | ssize_t ret = -EINVAL; | |
935 | ||
936 | if (netif_running(dev)) { | |
937 | int value; | |
938 | value = macb_mdio_read(dev, bp->mii.phy_id, addr); | |
939 | ret = sprintf(buf, "0x%04x\n", (uint16_t)value); | |
940 | } | |
941 | ||
942 | return ret; | |
943 | } | |
944 | ||
945 | #define MII_ENTRY(name, addr) \ | |
43cb76d9 GKH |
946 | static ssize_t show_##name(struct device *_dev, \ |
947 | struct device_attribute *attr, \ | |
948 | char *buf) \ | |
89e5785f | 949 | { \ |
43cb76d9 | 950 | return macb_mii_show(_dev, buf, addr); \ |
89e5785f | 951 | } \ |
43cb76d9 | 952 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
89e5785f HS |
953 | |
954 | MII_ENTRY(bmcr, MII_BMCR); | |
955 | MII_ENTRY(bmsr, MII_BMSR); | |
956 | MII_ENTRY(physid1, MII_PHYSID1); | |
957 | MII_ENTRY(physid2, MII_PHYSID2); | |
958 | MII_ENTRY(advertise, MII_ADVERTISE); | |
959 | MII_ENTRY(lpa, MII_LPA); | |
960 | MII_ENTRY(expansion, MII_EXPANSION); | |
961 | ||
962 | static struct attribute *macb_mii_attrs[] = { | |
43cb76d9 GKH |
963 | &dev_attr_bmcr.attr, |
964 | &dev_attr_bmsr.attr, | |
965 | &dev_attr_physid1.attr, | |
966 | &dev_attr_physid2.attr, | |
967 | &dev_attr_advertise.attr, | |
968 | &dev_attr_lpa.attr, | |
969 | &dev_attr_expansion.attr, | |
89e5785f HS |
970 | NULL, |
971 | }; | |
972 | ||
973 | static struct attribute_group macb_mii_group = { | |
974 | .name = "mii", | |
975 | .attrs = macb_mii_attrs, | |
976 | }; | |
977 | ||
978 | static void macb_unregister_sysfs(struct net_device *net) | |
979 | { | |
43cb76d9 | 980 | struct device *_dev = &net->dev; |
89e5785f | 981 | |
43cb76d9 | 982 | sysfs_remove_group(&_dev->kobj, &macb_mii_group); |
89e5785f HS |
983 | } |
984 | ||
985 | static int macb_register_sysfs(struct net_device *net) | |
986 | { | |
43cb76d9 | 987 | struct device *_dev = &net->dev; |
89e5785f HS |
988 | int ret; |
989 | ||
43cb76d9 | 990 | ret = sysfs_create_group(&_dev->kobj, &macb_mii_group); |
89e5785f HS |
991 | if (ret) |
992 | printk(KERN_WARNING | |
993 | "%s: sysfs mii attribute registration failed: %d\n", | |
994 | net->name, ret); | |
995 | return ret; | |
996 | } | |
997 | static int __devinit macb_probe(struct platform_device *pdev) | |
998 | { | |
999 | struct eth_platform_data *pdata; | |
1000 | struct resource *regs; | |
1001 | struct net_device *dev; | |
1002 | struct macb *bp; | |
1003 | unsigned long pclk_hz; | |
1004 | u32 config; | |
1005 | int err = -ENXIO; | |
1006 | ||
1007 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1008 | if (!regs) { | |
1009 | dev_err(&pdev->dev, "no mmio resource defined\n"); | |
1010 | goto err_out; | |
1011 | } | |
1012 | ||
1013 | err = -ENOMEM; | |
1014 | dev = alloc_etherdev(sizeof(*bp)); | |
1015 | if (!dev) { | |
1016 | dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n"); | |
1017 | goto err_out; | |
1018 | } | |
1019 | ||
1020 | SET_MODULE_OWNER(dev); | |
1021 | SET_NETDEV_DEV(dev, &pdev->dev); | |
1022 | ||
1023 | /* TODO: Actually, we have some interesting features... */ | |
1024 | dev->features |= 0; | |
1025 | ||
1026 | bp = netdev_priv(dev); | |
1027 | bp->pdev = pdev; | |
1028 | bp->dev = dev; | |
1029 | ||
1030 | spin_lock_init(&bp->lock); | |
1031 | ||
0cc8674f AV |
1032 | #if defined(CONFIG_ARCH_AT91) |
1033 | bp->pclk = clk_get(&pdev->dev, "macb_clk"); | |
1034 | if (IS_ERR(bp->pclk)) { | |
1035 | dev_err(&pdev->dev, "failed to get macb_clk\n"); | |
1036 | goto err_out_free_dev; | |
1037 | } | |
1038 | clk_enable(bp->pclk); | |
1039 | #else | |
89e5785f HS |
1040 | bp->pclk = clk_get(&pdev->dev, "pclk"); |
1041 | if (IS_ERR(bp->pclk)) { | |
1042 | dev_err(&pdev->dev, "failed to get pclk\n"); | |
1043 | goto err_out_free_dev; | |
1044 | } | |
1045 | bp->hclk = clk_get(&pdev->dev, "hclk"); | |
1046 | if (IS_ERR(bp->hclk)) { | |
1047 | dev_err(&pdev->dev, "failed to get hclk\n"); | |
1048 | goto err_out_put_pclk; | |
1049 | } | |
1050 | ||
1051 | clk_enable(bp->pclk); | |
1052 | clk_enable(bp->hclk); | |
0cc8674f | 1053 | #endif |
89e5785f HS |
1054 | |
1055 | bp->regs = ioremap(regs->start, regs->end - regs->start + 1); | |
1056 | if (!bp->regs) { | |
1057 | dev_err(&pdev->dev, "failed to map registers, aborting.\n"); | |
1058 | err = -ENOMEM; | |
1059 | goto err_out_disable_clocks; | |
1060 | } | |
1061 | ||
1062 | dev->irq = platform_get_irq(pdev, 0); | |
38515e90 | 1063 | err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM, |
89e5785f HS |
1064 | dev->name, dev); |
1065 | if (err) { | |
1066 | printk(KERN_ERR | |
1067 | "%s: Unable to request IRQ %d (error %d)\n", | |
1068 | dev->name, dev->irq, err); | |
1069 | goto err_out_iounmap; | |
1070 | } | |
1071 | ||
1072 | dev->open = macb_open; | |
1073 | dev->stop = macb_close; | |
1074 | dev->hard_start_xmit = macb_start_xmit; | |
1075 | dev->get_stats = macb_get_stats; | |
1076 | dev->do_ioctl = macb_ioctl; | |
1077 | dev->poll = macb_poll; | |
1078 | dev->weight = 64; | |
1079 | dev->ethtool_ops = &macb_ethtool_ops; | |
1080 | ||
1081 | dev->base_addr = regs->start; | |
1082 | ||
d836cae4 | 1083 | INIT_DELAYED_WORK(&bp->periodic_task, macb_periodic_task); |
89e5785f HS |
1084 | mutex_init(&bp->mdio_mutex); |
1085 | init_completion(&bp->mdio_complete); | |
1086 | ||
1087 | /* Set MII management clock divider */ | |
1088 | pclk_hz = clk_get_rate(bp->pclk); | |
1089 | if (pclk_hz <= 20000000) | |
1090 | config = MACB_BF(CLK, MACB_CLK_DIV8); | |
1091 | else if (pclk_hz <= 40000000) | |
1092 | config = MACB_BF(CLK, MACB_CLK_DIV16); | |
1093 | else if (pclk_hz <= 80000000) | |
1094 | config = MACB_BF(CLK, MACB_CLK_DIV32); | |
1095 | else | |
1096 | config = MACB_BF(CLK, MACB_CLK_DIV64); | |
1097 | macb_writel(bp, NCFGR, config); | |
1098 | ||
1099 | bp->mii.dev = dev; | |
1100 | bp->mii.mdio_read = macb_mdio_read; | |
1101 | bp->mii.mdio_write = macb_mdio_write; | |
1102 | bp->mii.phy_id_mask = 0x1f; | |
1103 | bp->mii.reg_num_mask = 0x1f; | |
1104 | ||
1105 | macb_get_hwaddr(bp); | |
1106 | err = macb_phy_probe(bp); | |
1107 | if (err) { | |
1108 | dev_err(&pdev->dev, "Failed to detect PHY, aborting.\n"); | |
1109 | goto err_out_free_irq; | |
1110 | } | |
1111 | ||
1112 | pdata = pdev->dev.platform_data; | |
1113 | if (pdata && pdata->is_rmii) | |
0cc8674f AV |
1114 | #if defined(CONFIG_ARCH_AT91) |
1115 | macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) ); | |
1116 | #else | |
89e5785f | 1117 | macb_writel(bp, USRIO, 0); |
0cc8674f | 1118 | #endif |
89e5785f | 1119 | else |
0cc8674f AV |
1120 | #if defined(CONFIG_ARCH_AT91) |
1121 | macb_writel(bp, USRIO, MACB_BIT(CLKEN)); | |
1122 | #else | |
89e5785f | 1123 | macb_writel(bp, USRIO, MACB_BIT(MII)); |
0cc8674f | 1124 | #endif |
89e5785f HS |
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: | |
0cc8674f | 1151 | #ifndef CONFIG_ARCH_AT91 |
89e5785f | 1152 | clk_disable(bp->hclk); |
89e5785f | 1153 | clk_put(bp->hclk); |
0cc8674f AV |
1154 | #endif |
1155 | clk_disable(bp->pclk); | |
89e5785f HS |
1156 | err_out_put_pclk: |
1157 | clk_put(bp->pclk); | |
1158 | err_out_free_dev: | |
1159 | free_netdev(dev); | |
1160 | err_out: | |
1161 | platform_set_drvdata(pdev, NULL); | |
1162 | return err; | |
1163 | } | |
1164 | ||
1165 | static int __devexit macb_remove(struct platform_device *pdev) | |
1166 | { | |
1167 | struct net_device *dev; | |
1168 | struct macb *bp; | |
1169 | ||
1170 | dev = platform_get_drvdata(pdev); | |
1171 | ||
1172 | if (dev) { | |
1173 | bp = netdev_priv(dev); | |
1174 | macb_unregister_sysfs(dev); | |
1175 | unregister_netdev(dev); | |
1176 | free_irq(dev->irq, dev); | |
1177 | iounmap(bp->regs); | |
0cc8674f | 1178 | #ifndef CONFIG_ARCH_AT91 |
89e5785f | 1179 | clk_disable(bp->hclk); |
89e5785f | 1180 | clk_put(bp->hclk); |
0cc8674f AV |
1181 | #endif |
1182 | clk_disable(bp->pclk); | |
89e5785f HS |
1183 | clk_put(bp->pclk); |
1184 | free_netdev(dev); | |
1185 | platform_set_drvdata(pdev, NULL); | |
1186 | } | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static struct platform_driver macb_driver = { | |
1192 | .probe = macb_probe, | |
1193 | .remove = __devexit_p(macb_remove), | |
1194 | .driver = { | |
1195 | .name = "macb", | |
1196 | }, | |
1197 | }; | |
1198 | ||
1199 | static int __init macb_init(void) | |
1200 | { | |
1201 | return platform_driver_register(&macb_driver); | |
1202 | } | |
1203 | ||
1204 | static void __exit macb_exit(void) | |
1205 | { | |
1206 | platform_driver_unregister(&macb_driver); | |
1207 | } | |
1208 | ||
1209 | module_init(macb_init); | |
1210 | module_exit(macb_exit); | |
1211 | ||
1212 | MODULE_LICENSE("GPL"); | |
1213 | MODULE_DESCRIPTION("Atmel MACB Ethernet driver"); | |
1214 | MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>"); |