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ARM: PL08x: ensure loops use cpu_relax()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / bcm63xx_enet.c
blobecfef240a303039390088f59b6425747377f1cdc
1 /*
2 * Driver for BCM963xx builtin Ethernet mac
3 *
4 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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 as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/clk.h>
23 #include <linux/etherdevice.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <linux/ethtool.h>
27 #include <linux/crc32.h>
28 #include <linux/err.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/platform_device.h>
31 #include <linux/if_vlan.h>
32
33 #include <bcm63xx_dev_enet.h>
34 #include "bcm63xx_enet.h"
35
36 static char bcm_enet_driver_name[] = "bcm63xx_enet";
37 static char bcm_enet_driver_version[] = "1.0";
38
39 static int copybreak __read_mostly = 128;
40 module_param(copybreak, int, 0);
41 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
42
43 /* io memory shared between all devices */
44 static void __iomem *bcm_enet_shared_base;
45
46 /*
47 * io helpers to access mac registers
48 */
49 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
50 {
51 return bcm_readl(priv->base + off);
52 }
53
54 static inline void enet_writel(struct bcm_enet_priv *priv,
55 u32 val, u32 off)
56 {
57 bcm_writel(val, priv->base + off);
58 }
59
60 /*
61 * io helpers to access shared registers
62 */
63 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
64 {
65 return bcm_readl(bcm_enet_shared_base + off);
66 }
67
68 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
69 u32 val, u32 off)
70 {
71 bcm_writel(val, bcm_enet_shared_base + off);
72 }
73
74 /*
75 * write given data into mii register and wait for transfer to end
76 * with timeout (average measured transfer time is 25us)
77 */
78 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
79 {
80 int limit;
81
82 /* make sure mii interrupt status is cleared */
83 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
84
85 enet_writel(priv, data, ENET_MIIDATA_REG);
86 wmb();
87
88 /* busy wait on mii interrupt bit, with timeout */
89 limit = 1000;
90 do {
91 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
92 break;
93 udelay(1);
94 } while (limit-- > 0);
95
96 return (limit < 0) ? 1 : 0;
97 }
98
99 /*
100 * MII internal read callback
101 */
102 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
103 int regnum)
104 {
105 u32 tmp, val;
106
107 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
108 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
109 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
110 tmp |= ENET_MIIDATA_OP_READ_MASK;
111
112 if (do_mdio_op(priv, tmp))
113 return -1;
114
115 val = enet_readl(priv, ENET_MIIDATA_REG);
116 val &= 0xffff;
117 return val;
118 }
119
120 /*
121 * MII internal write callback
122 */
123 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
124 int regnum, u16 value)
125 {
126 u32 tmp;
127
128 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
129 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
130 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
131 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
132 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
133
134 (void)do_mdio_op(priv, tmp);
135 return 0;
136 }
137
138 /*
139 * MII read callback from phylib
140 */
141 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
142 int regnum)
143 {
144 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
145 }
146
147 /*
148 * MII write callback from phylib
149 */
150 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
151 int regnum, u16 value)
152 {
153 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
154 }
155
156 /*
157 * MII read callback from mii core
158 */
159 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
160 int regnum)
161 {
162 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
163 }
164
165 /*
166 * MII write callback from mii core
167 */
168 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
169 int regnum, int value)
170 {
171 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
172 }
173
174 /*
175 * refill rx queue
176 */
177 static int bcm_enet_refill_rx(struct net_device *dev)
178 {
179 struct bcm_enet_priv *priv;
180
181 priv = netdev_priv(dev);
182
183 while (priv->rx_desc_count < priv->rx_ring_size) {
184 struct bcm_enet_desc *desc;
185 struct sk_buff *skb;
186 dma_addr_t p;
187 int desc_idx;
188 u32 len_stat;
189
190 desc_idx = priv->rx_dirty_desc;
191 desc = &priv->rx_desc_cpu[desc_idx];
192
193 if (!priv->rx_skb[desc_idx]) {
194 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
195 if (!skb)
196 break;
197 priv->rx_skb[desc_idx] = skb;
198
199 p = dma_map_single(&priv->pdev->dev, skb->data,
200 priv->rx_skb_size,
201 DMA_FROM_DEVICE);
202 desc->address = p;
203 }
204
205 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
206 len_stat |= DMADESC_OWNER_MASK;
207 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
208 len_stat |= DMADESC_WRAP_MASK;
209 priv->rx_dirty_desc = 0;
210 } else {
211 priv->rx_dirty_desc++;
212 }
213 wmb();
214 desc->len_stat = len_stat;
215
216 priv->rx_desc_count++;
217
218 /* tell dma engine we allocated one buffer */
219 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
220 }
221
222 /* If rx ring is still empty, set a timer to try allocating
223 * again at a later time. */
224 if (priv->rx_desc_count == 0 && netif_running(dev)) {
225 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
226 priv->rx_timeout.expires = jiffies + HZ;
227 add_timer(&priv->rx_timeout);
228 }
229
230 return 0;
231 }
232
233 /*
234 * timer callback to defer refill rx queue in case we're OOM
235 */
236 static void bcm_enet_refill_rx_timer(unsigned long data)
237 {
238 struct net_device *dev;
239 struct bcm_enet_priv *priv;
240
241 dev = (struct net_device *)data;
242 priv = netdev_priv(dev);
243
244 spin_lock(&priv->rx_lock);
245 bcm_enet_refill_rx((struct net_device *)data);
246 spin_unlock(&priv->rx_lock);
247 }
248
249 /*
250 * extract packet from rx queue
251 */
252 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
253 {
254 struct bcm_enet_priv *priv;
255 struct device *kdev;
256 int processed;
257
258 priv = netdev_priv(dev);
259 kdev = &priv->pdev->dev;
260 processed = 0;
261
262 /* don't scan ring further than number of refilled
263 * descriptor */
264 if (budget > priv->rx_desc_count)
265 budget = priv->rx_desc_count;
266
267 do {
268 struct bcm_enet_desc *desc;
269 struct sk_buff *skb;
270 int desc_idx;
271 u32 len_stat;
272 unsigned int len;
273
274 desc_idx = priv->rx_curr_desc;
275 desc = &priv->rx_desc_cpu[desc_idx];
276
277 /* make sure we actually read the descriptor status at
278 * each loop */
279 rmb();
280
281 len_stat = desc->len_stat;
282
283 /* break if dma ownership belongs to hw */
284 if (len_stat & DMADESC_OWNER_MASK)
285 break;
286
287 processed++;
288 priv->rx_curr_desc++;
289 if (priv->rx_curr_desc == priv->rx_ring_size)
290 priv->rx_curr_desc = 0;
291 priv->rx_desc_count--;
292
293 /* if the packet does not have start of packet _and_
294 * end of packet flag set, then just recycle it */
295 if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
296 dev->stats.rx_dropped++;
297 continue;
298 }
299
300 /* recycle packet if it's marked as bad */
301 if (unlikely(len_stat & DMADESC_ERR_MASK)) {
302 dev->stats.rx_errors++;
303
304 if (len_stat & DMADESC_OVSIZE_MASK)
305 dev->stats.rx_length_errors++;
306 if (len_stat & DMADESC_CRC_MASK)
307 dev->stats.rx_crc_errors++;
308 if (len_stat & DMADESC_UNDER_MASK)
309 dev->stats.rx_frame_errors++;
310 if (len_stat & DMADESC_OV_MASK)
311 dev->stats.rx_fifo_errors++;
312 continue;
313 }
314
315 /* valid packet */
316 skb = priv->rx_skb[desc_idx];
317 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
318 /* don't include FCS */
319 len -= 4;
320
321 if (len < copybreak) {
322 struct sk_buff *nskb;
323
324 nskb = netdev_alloc_skb_ip_align(dev, len);
325 if (!nskb) {
326 /* forget packet, just rearm desc */
327 dev->stats.rx_dropped++;
328 continue;
329 }
330
331 dma_sync_single_for_cpu(kdev, desc->address,
332 len, DMA_FROM_DEVICE);
333 memcpy(nskb->data, skb->data, len);
334 dma_sync_single_for_device(kdev, desc->address,
335 len, DMA_FROM_DEVICE);
336 skb = nskb;
337 } else {
338 dma_unmap_single(&priv->pdev->dev, desc->address,
339 priv->rx_skb_size, DMA_FROM_DEVICE);
340 priv->rx_skb[desc_idx] = NULL;
341 }
342
343 skb_put(skb, len);
344 skb->protocol = eth_type_trans(skb, dev);
345 dev->stats.rx_packets++;
346 dev->stats.rx_bytes += len;
347 netif_receive_skb(skb);
348
349 } while (--budget > 0);
350
351 if (processed || !priv->rx_desc_count) {
352 bcm_enet_refill_rx(dev);
353
354 /* kick rx dma */
355 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
356 ENETDMA_CHANCFG_REG(priv->rx_chan));
357 }
358
359 return processed;
360 }
361
362
363 /*
364 * try to or force reclaim of transmitted buffers
365 */
366 static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
367 {
368 struct bcm_enet_priv *priv;
369 int released;
370
371 priv = netdev_priv(dev);
372 released = 0;
373
374 while (priv->tx_desc_count < priv->tx_ring_size) {
375 struct bcm_enet_desc *desc;
376 struct sk_buff *skb;
377
378 /* We run in a bh and fight against start_xmit, which
379 * is called with bh disabled */
380 spin_lock(&priv->tx_lock);
381
382 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
383
384 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
385 spin_unlock(&priv->tx_lock);
386 break;
387 }
388
389 /* ensure other field of the descriptor were not read
390 * before we checked ownership */
391 rmb();
392
393 skb = priv->tx_skb[priv->tx_dirty_desc];
394 priv->tx_skb[priv->tx_dirty_desc] = NULL;
395 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
396 DMA_TO_DEVICE);
397
398 priv->tx_dirty_desc++;
399 if (priv->tx_dirty_desc == priv->tx_ring_size)
400 priv->tx_dirty_desc = 0;
401 priv->tx_desc_count++;
402
403 spin_unlock(&priv->tx_lock);
404
405 if (desc->len_stat & DMADESC_UNDER_MASK)
406 dev->stats.tx_errors++;
407
408 dev_kfree_skb(skb);
409 released++;
410 }
411
412 if (netif_queue_stopped(dev) && released)
413 netif_wake_queue(dev);
414
415 return released;
416 }
417
418 /*
419 * poll func, called by network core
420 */
421 static int bcm_enet_poll(struct napi_struct *napi, int budget)
422 {
423 struct bcm_enet_priv *priv;
424 struct net_device *dev;
425 int tx_work_done, rx_work_done;
426
427 priv = container_of(napi, struct bcm_enet_priv, napi);
428 dev = priv->net_dev;
429
430 /* ack interrupts */
431 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
432 ENETDMA_IR_REG(priv->rx_chan));
433 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
434 ENETDMA_IR_REG(priv->tx_chan));
435
436 /* reclaim sent skb */
437 tx_work_done = bcm_enet_tx_reclaim(dev, 0);
438
439 spin_lock(&priv->rx_lock);
440 rx_work_done = bcm_enet_receive_queue(dev, budget);
441 spin_unlock(&priv->rx_lock);
442
443 if (rx_work_done >= budget || tx_work_done > 0) {
444 /* rx/tx queue is not yet empty/clean */
445 return rx_work_done;
446 }
447
448 /* no more packet in rx/tx queue, remove device from poll
449 * queue */
450 napi_complete(napi);
451
452 /* restore rx/tx interrupt */
453 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
454 ENETDMA_IRMASK_REG(priv->rx_chan));
455 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
456 ENETDMA_IRMASK_REG(priv->tx_chan));
457
458 return rx_work_done;
459 }
460
461 /*
462 * mac interrupt handler
463 */
464 static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
465 {
466 struct net_device *dev;
467 struct bcm_enet_priv *priv;
468 u32 stat;
469
470 dev = dev_id;
471 priv = netdev_priv(dev);
472
473 stat = enet_readl(priv, ENET_IR_REG);
474 if (!(stat & ENET_IR_MIB))
475 return IRQ_NONE;
476
477 /* clear & mask interrupt */
478 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
479 enet_writel(priv, 0, ENET_IRMASK_REG);
480
481 /* read mib registers in workqueue */
482 schedule_work(&priv->mib_update_task);
483
484 return IRQ_HANDLED;
485 }
486
487 /*
488 * rx/tx dma interrupt handler
489 */
490 static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
491 {
492 struct net_device *dev;
493 struct bcm_enet_priv *priv;
494
495 dev = dev_id;
496 priv = netdev_priv(dev);
497
498 /* mask rx/tx interrupts */
499 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
500 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
501
502 napi_schedule(&priv->napi);
503
504 return IRQ_HANDLED;
505 }
506
507 /*
508 * tx request callback
509 */
510 static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
511 {
512 struct bcm_enet_priv *priv;
513 struct bcm_enet_desc *desc;
514 u32 len_stat;
515 int ret;
516
517 priv = netdev_priv(dev);
518
519 /* lock against tx reclaim */
520 spin_lock(&priv->tx_lock);
521
522 /* make sure the tx hw queue is not full, should not happen
523 * since we stop queue before it's the case */
524 if (unlikely(!priv->tx_desc_count)) {
525 netif_stop_queue(dev);
526 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
527 "available?\n");
528 ret = NETDEV_TX_BUSY;
529 goto out_unlock;
530 }
531
532 /* point to the next available desc */
533 desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
534 priv->tx_skb[priv->tx_curr_desc] = skb;
535
536 /* fill descriptor */
537 desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
538 DMA_TO_DEVICE);
539
540 len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
541 len_stat |= DMADESC_ESOP_MASK |
542 DMADESC_APPEND_CRC |
543 DMADESC_OWNER_MASK;
544
545 priv->tx_curr_desc++;
546 if (priv->tx_curr_desc == priv->tx_ring_size) {
547 priv->tx_curr_desc = 0;
548 len_stat |= DMADESC_WRAP_MASK;
549 }
550 priv->tx_desc_count--;
551
552 /* dma might be already polling, make sure we update desc
553 * fields in correct order */
554 wmb();
555 desc->len_stat = len_stat;
556 wmb();
557
558 /* kick tx dma */
559 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
560 ENETDMA_CHANCFG_REG(priv->tx_chan));
561
562 /* stop queue if no more desc available */
563 if (!priv->tx_desc_count)
564 netif_stop_queue(dev);
565
566 dev->stats.tx_bytes += skb->len;
567 dev->stats.tx_packets++;
568 ret = NETDEV_TX_OK;
569
570 out_unlock:
571 spin_unlock(&priv->tx_lock);
572 return ret;
573 }
574
575 /*
576 * Change the interface's mac address.
577 */
578 static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
579 {
580 struct bcm_enet_priv *priv;
581 struct sockaddr *addr = p;
582 u32 val;
583
584 priv = netdev_priv(dev);
585 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
586
587 /* use perfect match register 0 to store my mac address */
588 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
589 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
590 enet_writel(priv, val, ENET_PML_REG(0));
591
592 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
593 val |= ENET_PMH_DATAVALID_MASK;
594 enet_writel(priv, val, ENET_PMH_REG(0));
595
596 return 0;
597 }
598
599 /*
600 * Change rx mode (promiscous/allmulti) and update multicast list
601 */
602 static void bcm_enet_set_multicast_list(struct net_device *dev)
603 {
604 struct bcm_enet_priv *priv;
605 struct netdev_hw_addr *ha;
606 u32 val;
607 int i;
608
609 priv = netdev_priv(dev);
610
611 val = enet_readl(priv, ENET_RXCFG_REG);
612
613 if (dev->flags & IFF_PROMISC)
614 val |= ENET_RXCFG_PROMISC_MASK;
615 else
616 val &= ~ENET_RXCFG_PROMISC_MASK;
617
618 /* only 3 perfect match registers left, first one is used for
619 * own mac address */
620 if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
621 val |= ENET_RXCFG_ALLMCAST_MASK;
622 else
623 val &= ~ENET_RXCFG_ALLMCAST_MASK;
624
625 /* no need to set perfect match registers if we catch all
626 * multicast */
627 if (val & ENET_RXCFG_ALLMCAST_MASK) {
628 enet_writel(priv, val, ENET_RXCFG_REG);
629 return;
630 }
631
632 i = 0;
633 netdev_for_each_mc_addr(ha, dev) {
634 u8 *dmi_addr;
635 u32 tmp;
636
637 if (i == 3)
638 break;
639 /* update perfect match registers */
640 dmi_addr = ha->addr;
641 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
642 (dmi_addr[4] << 8) | dmi_addr[5];
643 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
644
645 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
646 tmp |= ENET_PMH_DATAVALID_MASK;
647 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
648 }
649
650 for (; i < 3; i++) {
651 enet_writel(priv, 0, ENET_PML_REG(i + 1));
652 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
653 }
654
655 enet_writel(priv, val, ENET_RXCFG_REG);
656 }
657
658 /*
659 * set mac duplex parameters
660 */
661 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
662 {
663 u32 val;
664
665 val = enet_readl(priv, ENET_TXCTL_REG);
666 if (fullduplex)
667 val |= ENET_TXCTL_FD_MASK;
668 else
669 val &= ~ENET_TXCTL_FD_MASK;
670 enet_writel(priv, val, ENET_TXCTL_REG);
671 }
672
673 /*
674 * set mac flow control parameters
675 */
676 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
677 {
678 u32 val;
679
680 /* rx flow control (pause frame handling) */
681 val = enet_readl(priv, ENET_RXCFG_REG);
682 if (rx_en)
683 val |= ENET_RXCFG_ENFLOW_MASK;
684 else
685 val &= ~ENET_RXCFG_ENFLOW_MASK;
686 enet_writel(priv, val, ENET_RXCFG_REG);
687
688 /* tx flow control (pause frame generation) */
689 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
690 if (tx_en)
691 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
692 else
693 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
694 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
695 }
696
697 /*
698 * link changed callback (from phylib)
699 */
700 static void bcm_enet_adjust_phy_link(struct net_device *dev)
701 {
702 struct bcm_enet_priv *priv;
703 struct phy_device *phydev;
704 int status_changed;
705
706 priv = netdev_priv(dev);
707 phydev = priv->phydev;
708 status_changed = 0;
709
710 if (priv->old_link != phydev->link) {
711 status_changed = 1;
712 priv->old_link = phydev->link;
713 }
714
715 /* reflect duplex change in mac configuration */
716 if (phydev->link && phydev->duplex != priv->old_duplex) {
717 bcm_enet_set_duplex(priv,
718 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
719 status_changed = 1;
720 priv->old_duplex = phydev->duplex;
721 }
722
723 /* enable flow control if remote advertise it (trust phylib to
724 * check that duplex is full */
725 if (phydev->link && phydev->pause != priv->old_pause) {
726 int rx_pause_en, tx_pause_en;
727
728 if (phydev->pause) {
729 /* pause was advertised by lpa and us */
730 rx_pause_en = 1;
731 tx_pause_en = 1;
732 } else if (!priv->pause_auto) {
733 /* pause setting overrided by user */
734 rx_pause_en = priv->pause_rx;
735 tx_pause_en = priv->pause_tx;
736 } else {
737 rx_pause_en = 0;
738 tx_pause_en = 0;
739 }
740
741 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
742 status_changed = 1;
743 priv->old_pause = phydev->pause;
744 }
745
746 if (status_changed) {
747 pr_info("%s: link %s", dev->name, phydev->link ?
748 "UP" : "DOWN");
749 if (phydev->link)
750 pr_cont(" - %d/%s - flow control %s", phydev->speed,
751 DUPLEX_FULL == phydev->duplex ? "full" : "half",
752 phydev->pause == 1 ? "rx&tx" : "off");
753
754 pr_cont("\n");
755 }
756 }
757
758 /*
759 * link changed callback (if phylib is not used)
760 */
761 static void bcm_enet_adjust_link(struct net_device *dev)
762 {
763 struct bcm_enet_priv *priv;
764
765 priv = netdev_priv(dev);
766 bcm_enet_set_duplex(priv, priv->force_duplex_full);
767 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
768 netif_carrier_on(dev);
769
770 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
771 dev->name,
772 priv->force_speed_100 ? 100 : 10,
773 priv->force_duplex_full ? "full" : "half",
774 priv->pause_rx ? "rx" : "off",
775 priv->pause_tx ? "tx" : "off");
776 }
777
778 /*
779 * open callback, allocate dma rings & buffers and start rx operation
780 */
781 static int bcm_enet_open(struct net_device *dev)
782 {
783 struct bcm_enet_priv *priv;
784 struct sockaddr addr;
785 struct device *kdev;
786 struct phy_device *phydev;
787 int i, ret;
788 unsigned int size;
789 char phy_id[MII_BUS_ID_SIZE + 3];
790 void *p;
791 u32 val;
792
793 priv = netdev_priv(dev);
794 kdev = &priv->pdev->dev;
795
796 if (priv->has_phy) {
797 /* connect to PHY */
798 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
799 priv->mac_id ? "1" : "0", priv->phy_id);
800
801 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link, 0,
802 PHY_INTERFACE_MODE_MII);
803
804 if (IS_ERR(phydev)) {
805 dev_err(kdev, "could not attach to PHY\n");
806 return PTR_ERR(phydev);
807 }
808
809 /* mask with MAC supported features */
810 phydev->supported &= (SUPPORTED_10baseT_Half |
811 SUPPORTED_10baseT_Full |
812 SUPPORTED_100baseT_Half |
813 SUPPORTED_100baseT_Full |
814 SUPPORTED_Autoneg |
815 SUPPORTED_Pause |
816 SUPPORTED_MII);
817 phydev->advertising = phydev->supported;
818
819 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
820 phydev->advertising |= SUPPORTED_Pause;
821 else
822 phydev->advertising &= ~SUPPORTED_Pause;
823
824 dev_info(kdev, "attached PHY at address %d [%s]\n",
825 phydev->addr, phydev->drv->name);
826
827 priv->old_link = 0;
828 priv->old_duplex = -1;
829 priv->old_pause = -1;
830 priv->phydev = phydev;
831 }
832
833 /* mask all interrupts and request them */
834 enet_writel(priv, 0, ENET_IRMASK_REG);
835 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
836 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
837
838 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
839 if (ret)
840 goto out_phy_disconnect;
841
842 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
843 IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev);
844 if (ret)
845 goto out_freeirq;
846
847 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
848 IRQF_DISABLED, dev->name, dev);
849 if (ret)
850 goto out_freeirq_rx;
851
852 /* initialize perfect match registers */
853 for (i = 0; i < 4; i++) {
854 enet_writel(priv, 0, ENET_PML_REG(i));
855 enet_writel(priv, 0, ENET_PMH_REG(i));
856 }
857
858 /* write device mac address */
859 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
860 bcm_enet_set_mac_address(dev, &addr);
861
862 /* allocate rx dma ring */
863 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
864 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
865 if (!p) {
866 dev_err(kdev, "cannot allocate rx ring %u\n", size);
867 ret = -ENOMEM;
868 goto out_freeirq_tx;
869 }
870
871 memset(p, 0, size);
872 priv->rx_desc_alloc_size = size;
873 priv->rx_desc_cpu = p;
874
875 /* allocate tx dma ring */
876 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
877 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
878 if (!p) {
879 dev_err(kdev, "cannot allocate tx ring\n");
880 ret = -ENOMEM;
881 goto out_free_rx_ring;
882 }
883
884 memset(p, 0, size);
885 priv->tx_desc_alloc_size = size;
886 priv->tx_desc_cpu = p;
887
888 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
889 GFP_KERNEL);
890 if (!priv->tx_skb) {
891 dev_err(kdev, "cannot allocate rx skb queue\n");
892 ret = -ENOMEM;
893 goto out_free_tx_ring;
894 }
895
896 priv->tx_desc_count = priv->tx_ring_size;
897 priv->tx_dirty_desc = 0;
898 priv->tx_curr_desc = 0;
899 spin_lock_init(&priv->tx_lock);
900
901 /* init & fill rx ring with skbs */
902 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
903 GFP_KERNEL);
904 if (!priv->rx_skb) {
905 dev_err(kdev, "cannot allocate rx skb queue\n");
906 ret = -ENOMEM;
907 goto out_free_tx_skb;
908 }
909
910 priv->rx_desc_count = 0;
911 priv->rx_dirty_desc = 0;
912 priv->rx_curr_desc = 0;
913
914 /* initialize flow control buffer allocation */
915 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
916 ENETDMA_BUFALLOC_REG(priv->rx_chan));
917
918 if (bcm_enet_refill_rx(dev)) {
919 dev_err(kdev, "cannot allocate rx skb queue\n");
920 ret = -ENOMEM;
921 goto out;
922 }
923
924 /* write rx & tx ring addresses */
925 enet_dma_writel(priv, priv->rx_desc_dma,
926 ENETDMA_RSTART_REG(priv->rx_chan));
927 enet_dma_writel(priv, priv->tx_desc_dma,
928 ENETDMA_RSTART_REG(priv->tx_chan));
929
930 /* clear remaining state ram for rx & tx channel */
931 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
932 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
933 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
934 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
935 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
936 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
937
938 /* set max rx/tx length */
939 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
940 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
941
942 /* set dma maximum burst len */
943 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
944 ENETDMA_MAXBURST_REG(priv->rx_chan));
945 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
946 ENETDMA_MAXBURST_REG(priv->tx_chan));
947
948 /* set correct transmit fifo watermark */
949 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
950
951 /* set flow control low/high threshold to 1/3 / 2/3 */
952 val = priv->rx_ring_size / 3;
953 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
954 val = (priv->rx_ring_size * 2) / 3;
955 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
956
957 /* all set, enable mac and interrupts, start dma engine and
958 * kick rx dma channel */
959 wmb();
960 val = enet_readl(priv, ENET_CTL_REG);
961 val |= ENET_CTL_ENABLE_MASK;
962 enet_writel(priv, val, ENET_CTL_REG);
963 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
964 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
965 ENETDMA_CHANCFG_REG(priv->rx_chan));
966
967 /* watch "mib counters about to overflow" interrupt */
968 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
969 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
970
971 /* watch "packet transferred" interrupt in rx and tx */
972 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
973 ENETDMA_IR_REG(priv->rx_chan));
974 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
975 ENETDMA_IR_REG(priv->tx_chan));
976
977 /* make sure we enable napi before rx interrupt */
978 napi_enable(&priv->napi);
979
980 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
981 ENETDMA_IRMASK_REG(priv->rx_chan));
982 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
983 ENETDMA_IRMASK_REG(priv->tx_chan));
984
985 if (priv->has_phy)
986 phy_start(priv->phydev);
987 else
988 bcm_enet_adjust_link(dev);
989
990 netif_start_queue(dev);
991 return 0;
992
993 out:
994 for (i = 0; i < priv->rx_ring_size; i++) {
995 struct bcm_enet_desc *desc;
996
997 if (!priv->rx_skb[i])
998 continue;
999
1000 desc = &priv->rx_desc_cpu[i];
1001 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1002 DMA_FROM_DEVICE);
1003 kfree_skb(priv->rx_skb[i]);
1004 }
1005 kfree(priv->rx_skb);
1006
1007 out_free_tx_skb:
1008 kfree(priv->tx_skb);
1009
1010 out_free_tx_ring:
1011 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1012 priv->tx_desc_cpu, priv->tx_desc_dma);
1013
1014 out_free_rx_ring:
1015 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1016 priv->rx_desc_cpu, priv->rx_desc_dma);
1017
1018 out_freeirq_tx:
1019 free_irq(priv->irq_tx, dev);
1020
1021 out_freeirq_rx:
1022 free_irq(priv->irq_rx, dev);
1023
1024 out_freeirq:
1025 free_irq(dev->irq, dev);
1026
1027 out_phy_disconnect:
1028 phy_disconnect(priv->phydev);
1029
1030 return ret;
1031 }
1032
1033 /*
1034 * disable mac
1035 */
1036 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1037 {
1038 int limit;
1039 u32 val;
1040
1041 val = enet_readl(priv, ENET_CTL_REG);
1042 val |= ENET_CTL_DISABLE_MASK;
1043 enet_writel(priv, val, ENET_CTL_REG);
1044
1045 limit = 1000;
1046 do {
1047 u32 val;
1048
1049 val = enet_readl(priv, ENET_CTL_REG);
1050 if (!(val & ENET_CTL_DISABLE_MASK))
1051 break;
1052 udelay(1);
1053 } while (limit--);
1054 }
1055
1056 /*
1057 * disable dma in given channel
1058 */
1059 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1060 {
1061 int limit;
1062
1063 enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
1064
1065 limit = 1000;
1066 do {
1067 u32 val;
1068
1069 val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
1070 if (!(val & ENETDMA_CHANCFG_EN_MASK))
1071 break;
1072 udelay(1);
1073 } while (limit--);
1074 }
1075
1076 /*
1077 * stop callback
1078 */
1079 static int bcm_enet_stop(struct net_device *dev)
1080 {
1081 struct bcm_enet_priv *priv;
1082 struct device *kdev;
1083 int i;
1084
1085 priv = netdev_priv(dev);
1086 kdev = &priv->pdev->dev;
1087
1088 netif_stop_queue(dev);
1089 napi_disable(&priv->napi);
1090 if (priv->has_phy)
1091 phy_stop(priv->phydev);
1092 del_timer_sync(&priv->rx_timeout);
1093
1094 /* mask all interrupts */
1095 enet_writel(priv, 0, ENET_IRMASK_REG);
1096 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
1097 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
1098
1099 /* make sure no mib update is scheduled */
1100 flush_scheduled_work();
1101
1102 /* disable dma & mac */
1103 bcm_enet_disable_dma(priv, priv->tx_chan);
1104 bcm_enet_disable_dma(priv, priv->rx_chan);
1105 bcm_enet_disable_mac(priv);
1106
1107 /* force reclaim of all tx buffers */
1108 bcm_enet_tx_reclaim(dev, 1);
1109
1110 /* free the rx skb ring */
1111 for (i = 0; i < priv->rx_ring_size; i++) {
1112 struct bcm_enet_desc *desc;
1113
1114 if (!priv->rx_skb[i])
1115 continue;
1116
1117 desc = &priv->rx_desc_cpu[i];
1118 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1119 DMA_FROM_DEVICE);
1120 kfree_skb(priv->rx_skb[i]);
1121 }
1122
1123 /* free remaining allocated memory */
1124 kfree(priv->rx_skb);
1125 kfree(priv->tx_skb);
1126 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1127 priv->rx_desc_cpu, priv->rx_desc_dma);
1128 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1129 priv->tx_desc_cpu, priv->tx_desc_dma);
1130 free_irq(priv->irq_tx, dev);
1131 free_irq(priv->irq_rx, dev);
1132 free_irq(dev->irq, dev);
1133
1134 /* release phy */
1135 if (priv->has_phy) {
1136 phy_disconnect(priv->phydev);
1137 priv->phydev = NULL;
1138 }
1139
1140 return 0;
1141 }
1142
1143 /*
1144 * ethtool callbacks
1145 */
1146 struct bcm_enet_stats {
1147 char stat_string[ETH_GSTRING_LEN];
1148 int sizeof_stat;
1149 int stat_offset;
1150 int mib_reg;
1151 };
1152
1153 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1154 offsetof(struct bcm_enet_priv, m)
1155 #define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1156 offsetof(struct net_device_stats, m)
1157
1158 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1159 { "rx_packets", DEV_STAT(rx_packets), -1 },
1160 { "tx_packets", DEV_STAT(tx_packets), -1 },
1161 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1162 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1163 { "rx_errors", DEV_STAT(rx_errors), -1 },
1164 { "tx_errors", DEV_STAT(tx_errors), -1 },
1165 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1166 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1167
1168 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1169 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1170 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1171 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1172 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1173 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1174 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1175 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1176 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1177 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1178 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1179 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1180 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1181 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1182 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1183 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1184 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1185 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1186 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1187 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1188 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1189
1190 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1191 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1192 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1193 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1194 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1195 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1196 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1197 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1198 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1199 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1200 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1201 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1202 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1203 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1204 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1205 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1206 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1207 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1208 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1209 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1210 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1211 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1212
1213 };
1214
1215 #define BCM_ENET_STATS_LEN \
1216 (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
1217
1218 static const u32 unused_mib_regs[] = {
1219 ETH_MIB_TX_ALL_OCTETS,
1220 ETH_MIB_TX_ALL_PKTS,
1221 ETH_MIB_RX_ALL_OCTETS,
1222 ETH_MIB_RX_ALL_PKTS,
1223 };
1224
1225
1226 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1227 struct ethtool_drvinfo *drvinfo)
1228 {
1229 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
1230 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
1231 strncpy(drvinfo->fw_version, "N/A", 32);
1232 strncpy(drvinfo->bus_info, "bcm63xx", 32);
1233 drvinfo->n_stats = BCM_ENET_STATS_LEN;
1234 }
1235
1236 static int bcm_enet_get_sset_count(struct net_device *netdev,
1237 int string_set)
1238 {
1239 switch (string_set) {
1240 case ETH_SS_STATS:
1241 return BCM_ENET_STATS_LEN;
1242 default:
1243 return -EINVAL;
1244 }
1245 }
1246
1247 static void bcm_enet_get_strings(struct net_device *netdev,
1248 u32 stringset, u8 *data)
1249 {
1250 int i;
1251
1252 switch (stringset) {
1253 case ETH_SS_STATS:
1254 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1255 memcpy(data + i * ETH_GSTRING_LEN,
1256 bcm_enet_gstrings_stats[i].stat_string,
1257 ETH_GSTRING_LEN);
1258 }
1259 break;
1260 }
1261 }
1262
1263 static void update_mib_counters(struct bcm_enet_priv *priv)
1264 {
1265 int i;
1266
1267 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1268 const struct bcm_enet_stats *s;
1269 u32 val;
1270 char *p;
1271
1272 s = &bcm_enet_gstrings_stats[i];
1273 if (s->mib_reg == -1)
1274 continue;
1275
1276 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1277 p = (char *)priv + s->stat_offset;
1278
1279 if (s->sizeof_stat == sizeof(u64))
1280 *(u64 *)p += val;
1281 else
1282 *(u32 *)p += val;
1283 }
1284
1285 /* also empty unused mib counters to make sure mib counter
1286 * overflow interrupt is cleared */
1287 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1288 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1289 }
1290
1291 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1292 {
1293 struct bcm_enet_priv *priv;
1294
1295 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1296 mutex_lock(&priv->mib_update_lock);
1297 update_mib_counters(priv);
1298 mutex_unlock(&priv->mib_update_lock);
1299
1300 /* reenable mib interrupt */
1301 if (netif_running(priv->net_dev))
1302 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1303 }
1304
1305 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1306 struct ethtool_stats *stats,
1307 u64 *data)
1308 {
1309 struct bcm_enet_priv *priv;
1310 int i;
1311
1312 priv = netdev_priv(netdev);
1313
1314 mutex_lock(&priv->mib_update_lock);
1315 update_mib_counters(priv);
1316
1317 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1318 const struct bcm_enet_stats *s;
1319 char *p;
1320
1321 s = &bcm_enet_gstrings_stats[i];
1322 if (s->mib_reg == -1)
1323 p = (char *)&netdev->stats;
1324 else
1325 p = (char *)priv;
1326 p += s->stat_offset;
1327 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1328 *(u64 *)p : *(u32 *)p;
1329 }
1330 mutex_unlock(&priv->mib_update_lock);
1331 }
1332
1333 static int bcm_enet_get_settings(struct net_device *dev,
1334 struct ethtool_cmd *cmd)
1335 {
1336 struct bcm_enet_priv *priv;
1337
1338 priv = netdev_priv(dev);
1339
1340 cmd->maxrxpkt = 0;
1341 cmd->maxtxpkt = 0;
1342
1343 if (priv->has_phy) {
1344 if (!priv->phydev)
1345 return -ENODEV;
1346 return phy_ethtool_gset(priv->phydev, cmd);
1347 } else {
1348 cmd->autoneg = 0;
1349 cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
1350 cmd->duplex = (priv->force_duplex_full) ?
1351 DUPLEX_FULL : DUPLEX_HALF;
1352 cmd->supported = ADVERTISED_10baseT_Half |
1353 ADVERTISED_10baseT_Full |
1354 ADVERTISED_100baseT_Half |
1355 ADVERTISED_100baseT_Full;
1356 cmd->advertising = 0;
1357 cmd->port = PORT_MII;
1358 cmd->transceiver = XCVR_EXTERNAL;
1359 }
1360 return 0;
1361 }
1362
1363 static int bcm_enet_set_settings(struct net_device *dev,
1364 struct ethtool_cmd *cmd)
1365 {
1366 struct bcm_enet_priv *priv;
1367
1368 priv = netdev_priv(dev);
1369 if (priv->has_phy) {
1370 if (!priv->phydev)
1371 return -ENODEV;
1372 return phy_ethtool_sset(priv->phydev, cmd);
1373 } else {
1374
1375 if (cmd->autoneg ||
1376 (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1377 cmd->port != PORT_MII)
1378 return -EINVAL;
1379
1380 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1381 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1382
1383 if (netif_running(dev))
1384 bcm_enet_adjust_link(dev);
1385 return 0;
1386 }
1387 }
1388
1389 static void bcm_enet_get_ringparam(struct net_device *dev,
1390 struct ethtool_ringparam *ering)
1391 {
1392 struct bcm_enet_priv *priv;
1393
1394 priv = netdev_priv(dev);
1395
1396 /* rx/tx ring is actually only limited by memory */
1397 ering->rx_max_pending = 8192;
1398 ering->tx_max_pending = 8192;
1399 ering->rx_mini_max_pending = 0;
1400 ering->rx_jumbo_max_pending = 0;
1401 ering->rx_pending = priv->rx_ring_size;
1402 ering->tx_pending = priv->tx_ring_size;
1403 }
1404
1405 static int bcm_enet_set_ringparam(struct net_device *dev,
1406 struct ethtool_ringparam *ering)
1407 {
1408 struct bcm_enet_priv *priv;
1409 int was_running;
1410
1411 priv = netdev_priv(dev);
1412
1413 was_running = 0;
1414 if (netif_running(dev)) {
1415 bcm_enet_stop(dev);
1416 was_running = 1;
1417 }
1418
1419 priv->rx_ring_size = ering->rx_pending;
1420 priv->tx_ring_size = ering->tx_pending;
1421
1422 if (was_running) {
1423 int err;
1424
1425 err = bcm_enet_open(dev);
1426 if (err)
1427 dev_close(dev);
1428 else
1429 bcm_enet_set_multicast_list(dev);
1430 }
1431 return 0;
1432 }
1433
1434 static void bcm_enet_get_pauseparam(struct net_device *dev,
1435 struct ethtool_pauseparam *ecmd)
1436 {
1437 struct bcm_enet_priv *priv;
1438
1439 priv = netdev_priv(dev);
1440 ecmd->autoneg = priv->pause_auto;
1441 ecmd->rx_pause = priv->pause_rx;
1442 ecmd->tx_pause = priv->pause_tx;
1443 }
1444
1445 static int bcm_enet_set_pauseparam(struct net_device *dev,
1446 struct ethtool_pauseparam *ecmd)
1447 {
1448 struct bcm_enet_priv *priv;
1449
1450 priv = netdev_priv(dev);
1451
1452 if (priv->has_phy) {
1453 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1454 /* asymetric pause mode not supported,
1455 * actually possible but integrated PHY has RO
1456 * asym_pause bit */
1457 return -EINVAL;
1458 }
1459 } else {
1460 /* no pause autoneg on direct mii connection */
1461 if (ecmd->autoneg)
1462 return -EINVAL;
1463 }
1464
1465 priv->pause_auto = ecmd->autoneg;
1466 priv->pause_rx = ecmd->rx_pause;
1467 priv->pause_tx = ecmd->tx_pause;
1468
1469 return 0;
1470 }
1471
1472 static struct ethtool_ops bcm_enet_ethtool_ops = {
1473 .get_strings = bcm_enet_get_strings,
1474 .get_sset_count = bcm_enet_get_sset_count,
1475 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1476 .get_settings = bcm_enet_get_settings,
1477 .set_settings = bcm_enet_set_settings,
1478 .get_drvinfo = bcm_enet_get_drvinfo,
1479 .get_link = ethtool_op_get_link,
1480 .get_ringparam = bcm_enet_get_ringparam,
1481 .set_ringparam = bcm_enet_set_ringparam,
1482 .get_pauseparam = bcm_enet_get_pauseparam,
1483 .set_pauseparam = bcm_enet_set_pauseparam,
1484 };
1485
1486 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1487 {
1488 struct bcm_enet_priv *priv;
1489
1490 priv = netdev_priv(dev);
1491 if (priv->has_phy) {
1492 if (!priv->phydev)
1493 return -ENODEV;
1494 return phy_mii_ioctl(priv->phydev, rq, cmd);
1495 } else {
1496 struct mii_if_info mii;
1497
1498 mii.dev = dev;
1499 mii.mdio_read = bcm_enet_mdio_read_mii;
1500 mii.mdio_write = bcm_enet_mdio_write_mii;
1501 mii.phy_id = 0;
1502 mii.phy_id_mask = 0x3f;
1503 mii.reg_num_mask = 0x1f;
1504 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1505 }
1506 }
1507
1508 /*
1509 * calculate actual hardware mtu
1510 */
1511 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1512 {
1513 int actual_mtu;
1514
1515 actual_mtu = mtu;
1516
1517 /* add ethernet header + vlan tag size */
1518 actual_mtu += VLAN_ETH_HLEN;
1519
1520 if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1521 return -EINVAL;
1522
1523 /*
1524 * setup maximum size before we get overflow mark in
1525 * descriptor, note that this will not prevent reception of
1526 * big frames, they will be split into multiple buffers
1527 * anyway
1528 */
1529 priv->hw_mtu = actual_mtu;
1530
1531 /*
1532 * align rx buffer size to dma burst len, account FCS since
1533 * it's appended
1534 */
1535 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1536 BCMENET_DMA_MAXBURST * 4);
1537 return 0;
1538 }
1539
1540 /*
1541 * adjust mtu, can't be called while device is running
1542 */
1543 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1544 {
1545 int ret;
1546
1547 if (netif_running(dev))
1548 return -EBUSY;
1549
1550 ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1551 if (ret)
1552 return ret;
1553 dev->mtu = new_mtu;
1554 return 0;
1555 }
1556
1557 /*
1558 * preinit hardware to allow mii operation while device is down
1559 */
1560 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1561 {
1562 u32 val;
1563 int limit;
1564
1565 /* make sure mac is disabled */
1566 bcm_enet_disable_mac(priv);
1567
1568 /* soft reset mac */
1569 val = ENET_CTL_SRESET_MASK;
1570 enet_writel(priv, val, ENET_CTL_REG);
1571 wmb();
1572
1573 limit = 1000;
1574 do {
1575 val = enet_readl(priv, ENET_CTL_REG);
1576 if (!(val & ENET_CTL_SRESET_MASK))
1577 break;
1578 udelay(1);
1579 } while (limit--);
1580
1581 /* select correct mii interface */
1582 val = enet_readl(priv, ENET_CTL_REG);
1583 if (priv->use_external_mii)
1584 val |= ENET_CTL_EPHYSEL_MASK;
1585 else
1586 val &= ~ENET_CTL_EPHYSEL_MASK;
1587 enet_writel(priv, val, ENET_CTL_REG);
1588
1589 /* turn on mdc clock */
1590 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1591 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1592
1593 /* set mib counters to self-clear when read */
1594 val = enet_readl(priv, ENET_MIBCTL_REG);
1595 val |= ENET_MIBCTL_RDCLEAR_MASK;
1596 enet_writel(priv, val, ENET_MIBCTL_REG);
1597 }
1598
1599 static const struct net_device_ops bcm_enet_ops = {
1600 .ndo_open = bcm_enet_open,
1601 .ndo_stop = bcm_enet_stop,
1602 .ndo_start_xmit = bcm_enet_start_xmit,
1603 .ndo_set_mac_address = bcm_enet_set_mac_address,
1604 .ndo_set_multicast_list = bcm_enet_set_multicast_list,
1605 .ndo_do_ioctl = bcm_enet_ioctl,
1606 .ndo_change_mtu = bcm_enet_change_mtu,
1607 #ifdef CONFIG_NET_POLL_CONTROLLER
1608 .ndo_poll_controller = bcm_enet_netpoll,
1609 #endif
1610 };
1611
1612 /*
1613 * allocate netdevice, request register memory and register device.
1614 */
1615 static int __devinit bcm_enet_probe(struct platform_device *pdev)
1616 {
1617 struct bcm_enet_priv *priv;
1618 struct net_device *dev;
1619 struct bcm63xx_enet_platform_data *pd;
1620 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1621 struct mii_bus *bus;
1622 const char *clk_name;
1623 unsigned int iomem_size;
1624 int i, ret;
1625
1626 /* stop if shared driver failed, assume driver->probe will be
1627 * called in the same order we register devices (correct ?) */
1628 if (!bcm_enet_shared_base)
1629 return -ENODEV;
1630
1631 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1632 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1633 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1634 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1635 if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
1636 return -ENODEV;
1637
1638 ret = 0;
1639 dev = alloc_etherdev(sizeof(*priv));
1640 if (!dev)
1641 return -ENOMEM;
1642 priv = netdev_priv(dev);
1643
1644 ret = compute_hw_mtu(priv, dev->mtu);
1645 if (ret)
1646 goto out;
1647
1648 iomem_size = res_mem->end - res_mem->start + 1;
1649 if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
1650 ret = -EBUSY;
1651 goto out;
1652 }
1653
1654 priv->base = ioremap(res_mem->start, iomem_size);
1655 if (priv->base == NULL) {
1656 ret = -ENOMEM;
1657 goto out_release_mem;
1658 }
1659 dev->irq = priv->irq = res_irq->start;
1660 priv->irq_rx = res_irq_rx->start;
1661 priv->irq_tx = res_irq_tx->start;
1662 priv->mac_id = pdev->id;
1663
1664 /* get rx & tx dma channel id for this mac */
1665 if (priv->mac_id == 0) {
1666 priv->rx_chan = 0;
1667 priv->tx_chan = 1;
1668 clk_name = "enet0";
1669 } else {
1670 priv->rx_chan = 2;
1671 priv->tx_chan = 3;
1672 clk_name = "enet1";
1673 }
1674
1675 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1676 if (IS_ERR(priv->mac_clk)) {
1677 ret = PTR_ERR(priv->mac_clk);
1678 goto out_unmap;
1679 }
1680 clk_enable(priv->mac_clk);
1681
1682 /* initialize default and fetch platform data */
1683 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1684 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1685
1686 pd = pdev->dev.platform_data;
1687 if (pd) {
1688 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1689 priv->has_phy = pd->has_phy;
1690 priv->phy_id = pd->phy_id;
1691 priv->has_phy_interrupt = pd->has_phy_interrupt;
1692 priv->phy_interrupt = pd->phy_interrupt;
1693 priv->use_external_mii = !pd->use_internal_phy;
1694 priv->pause_auto = pd->pause_auto;
1695 priv->pause_rx = pd->pause_rx;
1696 priv->pause_tx = pd->pause_tx;
1697 priv->force_duplex_full = pd->force_duplex_full;
1698 priv->force_speed_100 = pd->force_speed_100;
1699 }
1700
1701 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1702 /* using internal PHY, enable clock */
1703 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1704 if (IS_ERR(priv->phy_clk)) {
1705 ret = PTR_ERR(priv->phy_clk);
1706 priv->phy_clk = NULL;
1707 goto out_put_clk_mac;
1708 }
1709 clk_enable(priv->phy_clk);
1710 }
1711
1712 /* do minimal hardware init to be able to probe mii bus */
1713 bcm_enet_hw_preinit(priv);
1714
1715 /* MII bus registration */
1716 if (priv->has_phy) {
1717
1718 priv->mii_bus = mdiobus_alloc();
1719 if (!priv->mii_bus) {
1720 ret = -ENOMEM;
1721 goto out_uninit_hw;
1722 }
1723
1724 bus = priv->mii_bus;
1725 bus->name = "bcm63xx_enet MII bus";
1726 bus->parent = &pdev->dev;
1727 bus->priv = priv;
1728 bus->read = bcm_enet_mdio_read_phylib;
1729 bus->write = bcm_enet_mdio_write_phylib;
1730 sprintf(bus->id, "%d", priv->mac_id);
1731
1732 /* only probe bus where we think the PHY is, because
1733 * the mdio read operation return 0 instead of 0xffff
1734 * if a slave is not present on hw */
1735 bus->phy_mask = ~(1 << priv->phy_id);
1736
1737 bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
1738 if (!bus->irq) {
1739 ret = -ENOMEM;
1740 goto out_free_mdio;
1741 }
1742
1743 if (priv->has_phy_interrupt)
1744 bus->irq[priv->phy_id] = priv->phy_interrupt;
1745 else
1746 bus->irq[priv->phy_id] = PHY_POLL;
1747
1748 ret = mdiobus_register(bus);
1749 if (ret) {
1750 dev_err(&pdev->dev, "unable to register mdio bus\n");
1751 goto out_free_mdio;
1752 }
1753 } else {
1754
1755 /* run platform code to initialize PHY device */
1756 if (pd->mii_config &&
1757 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1758 bcm_enet_mdio_write_mii)) {
1759 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1760 goto out_uninit_hw;
1761 }
1762 }
1763
1764 spin_lock_init(&priv->rx_lock);
1765
1766 /* init rx timeout (used for oom) */
1767 init_timer(&priv->rx_timeout);
1768 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1769 priv->rx_timeout.data = (unsigned long)dev;
1770
1771 /* init the mib update lock&work */
1772 mutex_init(&priv->mib_update_lock);
1773 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1774
1775 /* zero mib counters */
1776 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1777 enet_writel(priv, 0, ENET_MIB_REG(i));
1778
1779 /* register netdevice */
1780 dev->netdev_ops = &bcm_enet_ops;
1781 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1782
1783 SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
1784 SET_NETDEV_DEV(dev, &pdev->dev);
1785
1786 ret = register_netdev(dev);
1787 if (ret)
1788 goto out_unregister_mdio;
1789
1790 netif_carrier_off(dev);
1791 platform_set_drvdata(pdev, dev);
1792 priv->pdev = pdev;
1793 priv->net_dev = dev;
1794
1795 return 0;
1796
1797 out_unregister_mdio:
1798 if (priv->mii_bus) {
1799 mdiobus_unregister(priv->mii_bus);
1800 kfree(priv->mii_bus->irq);
1801 }
1802
1803 out_free_mdio:
1804 if (priv->mii_bus)
1805 mdiobus_free(priv->mii_bus);
1806
1807 out_uninit_hw:
1808 /* turn off mdc clock */
1809 enet_writel(priv, 0, ENET_MIISC_REG);
1810 if (priv->phy_clk) {
1811 clk_disable(priv->phy_clk);
1812 clk_put(priv->phy_clk);
1813 }
1814
1815 out_put_clk_mac:
1816 clk_disable(priv->mac_clk);
1817 clk_put(priv->mac_clk);
1818
1819 out_unmap:
1820 iounmap(priv->base);
1821
1822 out_release_mem:
1823 release_mem_region(res_mem->start, iomem_size);
1824 out:
1825 free_netdev(dev);
1826 return ret;
1827 }
1828
1829
1830 /*
1831 * exit func, stops hardware and unregisters netdevice
1832 */
1833 static int __devexit bcm_enet_remove(struct platform_device *pdev)
1834 {
1835 struct bcm_enet_priv *priv;
1836 struct net_device *dev;
1837 struct resource *res;
1838
1839 /* stop netdevice */
1840 dev = platform_get_drvdata(pdev);
1841 priv = netdev_priv(dev);
1842 unregister_netdev(dev);
1843
1844 /* turn off mdc clock */
1845 enet_writel(priv, 0, ENET_MIISC_REG);
1846
1847 if (priv->has_phy) {
1848 mdiobus_unregister(priv->mii_bus);
1849 kfree(priv->mii_bus->irq);
1850 mdiobus_free(priv->mii_bus);
1851 } else {
1852 struct bcm63xx_enet_platform_data *pd;
1853
1854 pd = pdev->dev.platform_data;
1855 if (pd && pd->mii_config)
1856 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1857 bcm_enet_mdio_write_mii);
1858 }
1859
1860 /* release device resources */
1861 iounmap(priv->base);
1862 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1863 release_mem_region(res->start, res->end - res->start + 1);
1864
1865 /* disable hw block clocks */
1866 if (priv->phy_clk) {
1867 clk_disable(priv->phy_clk);
1868 clk_put(priv->phy_clk);
1869 }
1870 clk_disable(priv->mac_clk);
1871 clk_put(priv->mac_clk);
1872
1873 platform_set_drvdata(pdev, NULL);
1874 free_netdev(dev);
1875 return 0;
1876 }
1877
1878 struct platform_driver bcm63xx_enet_driver = {
1879 .probe = bcm_enet_probe,
1880 .remove = __devexit_p(bcm_enet_remove),
1881 .driver = {
1882 .name = "bcm63xx_enet",
1883 .owner = THIS_MODULE,
1884 },
1885 };
1886
1887 /*
1888 * reserve & remap memory space shared between all macs
1889 */
1890 static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
1891 {
1892 struct resource *res;
1893 unsigned int iomem_size;
1894
1895 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1896 if (!res)
1897 return -ENODEV;
1898
1899 iomem_size = res->end - res->start + 1;
1900 if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
1901 return -EBUSY;
1902
1903 bcm_enet_shared_base = ioremap(res->start, iomem_size);
1904 if (!bcm_enet_shared_base) {
1905 release_mem_region(res->start, iomem_size);
1906 return -ENOMEM;
1907 }
1908 return 0;
1909 }
1910
1911 static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
1912 {
1913 struct resource *res;
1914
1915 iounmap(bcm_enet_shared_base);
1916 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1917 release_mem_region(res->start, res->end - res->start + 1);
1918 return 0;
1919 }
1920
1921 /*
1922 * this "shared" driver is needed because both macs share a single
1923 * address space
1924 */
1925 struct platform_driver bcm63xx_enet_shared_driver = {
1926 .probe = bcm_enet_shared_probe,
1927 .remove = __devexit_p(bcm_enet_shared_remove),
1928 .driver = {
1929 .name = "bcm63xx_enet_shared",
1930 .owner = THIS_MODULE,
1931 },
1932 };
1933
1934 /*
1935 * entry point
1936 */
1937 static int __init bcm_enet_init(void)
1938 {
1939 int ret;
1940
1941 ret = platform_driver_register(&bcm63xx_enet_shared_driver);
1942 if (ret)
1943 return ret;
1944
1945 ret = platform_driver_register(&bcm63xx_enet_driver);
1946 if (ret)
1947 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1948
1949 return ret;
1950 }
1951
1952 static void __exit bcm_enet_exit(void)
1953 {
1954 platform_driver_unregister(&bcm63xx_enet_driver);
1955 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1956 }
1957
1958
1959 module_init(bcm_enet_init);
1960 module_exit(bcm_enet_exit);
1961
1962 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
1963 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
1964 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree