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regulator: Specify REGULATOR_CHANGE_STATUS for WM835x LED constraints
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / bcm63xx_enet.c
blob0bd47d32ec425c531fac9468eaf297531e2140cc
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/delay.h>
25 #include <linux/ethtool.h>
26 #include <linux/crc32.h>
27 #include <linux/err.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/platform_device.h>
30 #include <linux/if_vlan.h>
31
32 #include <bcm63xx_dev_enet.h>
33 #include "bcm63xx_enet.h"
34
35 static char bcm_enet_driver_name[] = "bcm63xx_enet";
36 static char bcm_enet_driver_version[] = "1.0";
37
38 static int copybreak __read_mostly = 128;
39 module_param(copybreak, int, 0);
40 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
41
42 /* io memory shared between all devices */
43 static void __iomem *bcm_enet_shared_base;
44
45 /*
46 * io helpers to access mac registers
47 */
48 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
49 {
50 return bcm_readl(priv->base + off);
51 }
52
53 static inline void enet_writel(struct bcm_enet_priv *priv,
54 u32 val, u32 off)
55 {
56 bcm_writel(val, priv->base + off);
57 }
58
59 /*
60 * io helpers to access shared registers
61 */
62 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
63 {
64 return bcm_readl(bcm_enet_shared_base + off);
65 }
66
67 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
68 u32 val, u32 off)
69 {
70 bcm_writel(val, bcm_enet_shared_base + off);
71 }
72
73 /*
74 * write given data into mii register and wait for transfer to end
75 * with timeout (average measured transfer time is 25us)
76 */
77 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
78 {
79 int limit;
80
81 /* make sure mii interrupt status is cleared */
82 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
83
84 enet_writel(priv, data, ENET_MIIDATA_REG);
85 wmb();
86
87 /* busy wait on mii interrupt bit, with timeout */
88 limit = 1000;
89 do {
90 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
91 break;
92 udelay(1);
93 } while (limit-- > 0);
94
95 return (limit < 0) ? 1 : 0;
96 }
97
98 /*
99 * MII internal read callback
100 */
101 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
102 int regnum)
103 {
104 u32 tmp, val;
105
106 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
107 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
108 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
109 tmp |= ENET_MIIDATA_OP_READ_MASK;
110
111 if (do_mdio_op(priv, tmp))
112 return -1;
113
114 val = enet_readl(priv, ENET_MIIDATA_REG);
115 val &= 0xffff;
116 return val;
117 }
118
119 /*
120 * MII internal write callback
121 */
122 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
123 int regnum, u16 value)
124 {
125 u32 tmp;
126
127 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
128 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
129 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
130 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
131 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
132
133 (void)do_mdio_op(priv, tmp);
134 return 0;
135 }
136
137 /*
138 * MII read callback from phylib
139 */
140 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
141 int regnum)
142 {
143 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
144 }
145
146 /*
147 * MII write callback from phylib
148 */
149 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
150 int regnum, u16 value)
151 {
152 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
153 }
154
155 /*
156 * MII read callback from mii core
157 */
158 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
159 int regnum)
160 {
161 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
162 }
163
164 /*
165 * MII write callback from mii core
166 */
167 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
168 int regnum, int value)
169 {
170 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
171 }
172
173 /*
174 * refill rx queue
175 */
176 static int bcm_enet_refill_rx(struct net_device *dev)
177 {
178 struct bcm_enet_priv *priv;
179
180 priv = netdev_priv(dev);
181
182 while (priv->rx_desc_count < priv->rx_ring_size) {
183 struct bcm_enet_desc *desc;
184 struct sk_buff *skb;
185 dma_addr_t p;
186 int desc_idx;
187 u32 len_stat;
188
189 desc_idx = priv->rx_dirty_desc;
190 desc = &priv->rx_desc_cpu[desc_idx];
191
192 if (!priv->rx_skb[desc_idx]) {
193 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
194 if (!skb)
195 break;
196 priv->rx_skb[desc_idx] = skb;
197
198 p = dma_map_single(&priv->pdev->dev, skb->data,
199 priv->rx_skb_size,
200 DMA_FROM_DEVICE);
201 desc->address = p;
202 }
203
204 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
205 len_stat |= DMADESC_OWNER_MASK;
206 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
207 len_stat |= DMADESC_WRAP_MASK;
208 priv->rx_dirty_desc = 0;
209 } else {
210 priv->rx_dirty_desc++;
211 }
212 wmb();
213 desc->len_stat = len_stat;
214
215 priv->rx_desc_count++;
216
217 /* tell dma engine we allocated one buffer */
218 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
219 }
220
221 /* If rx ring is still empty, set a timer to try allocating
222 * again at a later time. */
223 if (priv->rx_desc_count == 0 && netif_running(dev)) {
224 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
225 priv->rx_timeout.expires = jiffies + HZ;
226 add_timer(&priv->rx_timeout);
227 }
228
229 return 0;
230 }
231
232 /*
233 * timer callback to defer refill rx queue in case we're OOM
234 */
235 static void bcm_enet_refill_rx_timer(unsigned long data)
236 {
237 struct net_device *dev;
238 struct bcm_enet_priv *priv;
239
240 dev = (struct net_device *)data;
241 priv = netdev_priv(dev);
242
243 spin_lock(&priv->rx_lock);
244 bcm_enet_refill_rx((struct net_device *)data);
245 spin_unlock(&priv->rx_lock);
246 }
247
248 /*
249 * extract packet from rx queue
250 */
251 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
252 {
253 struct bcm_enet_priv *priv;
254 struct device *kdev;
255 int processed;
256
257 priv = netdev_priv(dev);
258 kdev = &priv->pdev->dev;
259 processed = 0;
260
261 /* don't scan ring further than number of refilled
262 * descriptor */
263 if (budget > priv->rx_desc_count)
264 budget = priv->rx_desc_count;
265
266 do {
267 struct bcm_enet_desc *desc;
268 struct sk_buff *skb;
269 int desc_idx;
270 u32 len_stat;
271 unsigned int len;
272
273 desc_idx = priv->rx_curr_desc;
274 desc = &priv->rx_desc_cpu[desc_idx];
275
276 /* make sure we actually read the descriptor status at
277 * each loop */
278 rmb();
279
280 len_stat = desc->len_stat;
281
282 /* break if dma ownership belongs to hw */
283 if (len_stat & DMADESC_OWNER_MASK)
284 break;
285
286 processed++;
287 priv->rx_curr_desc++;
288 if (priv->rx_curr_desc == priv->rx_ring_size)
289 priv->rx_curr_desc = 0;
290 priv->rx_desc_count--;
291
292 /* if the packet does not have start of packet _and_
293 * end of packet flag set, then just recycle it */
294 if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
295 priv->stats.rx_dropped++;
296 continue;
297 }
298
299 /* recycle packet if it's marked as bad */
300 if (unlikely(len_stat & DMADESC_ERR_MASK)) {
301 priv->stats.rx_errors++;
302
303 if (len_stat & DMADESC_OVSIZE_MASK)
304 priv->stats.rx_length_errors++;
305 if (len_stat & DMADESC_CRC_MASK)
306 priv->stats.rx_crc_errors++;
307 if (len_stat & DMADESC_UNDER_MASK)
308 priv->stats.rx_frame_errors++;
309 if (len_stat & DMADESC_OV_MASK)
310 priv->stats.rx_fifo_errors++;
311 continue;
312 }
313
314 /* valid packet */
315 skb = priv->rx_skb[desc_idx];
316 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
317 /* don't include FCS */
318 len -= 4;
319
320 if (len < copybreak) {
321 struct sk_buff *nskb;
322
323 nskb = netdev_alloc_skb_ip_align(dev, len);
324 if (!nskb) {
325 /* forget packet, just rearm desc */
326 priv->stats.rx_dropped++;
327 continue;
328 }
329
330 dma_sync_single_for_cpu(kdev, desc->address,
331 len, DMA_FROM_DEVICE);
332 memcpy(nskb->data, skb->data, len);
333 dma_sync_single_for_device(kdev, desc->address,
334 len, DMA_FROM_DEVICE);
335 skb = nskb;
336 } else {
337 dma_unmap_single(&priv->pdev->dev, desc->address,
338 priv->rx_skb_size, DMA_FROM_DEVICE);
339 priv->rx_skb[desc_idx] = NULL;
340 }
341
342 skb_put(skb, len);
343 skb->dev = dev;
344 skb->protocol = eth_type_trans(skb, dev);
345 priv->stats.rx_packets++;
346 priv->stats.rx_bytes += len;
347 dev->last_rx = jiffies;
348 netif_receive_skb(skb);
349
350 } while (--budget > 0);
351
352 if (processed || !priv->rx_desc_count) {
353 bcm_enet_refill_rx(dev);
354
355 /* kick rx dma */
356 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
357 ENETDMA_CHANCFG_REG(priv->rx_chan));
358 }
359
360 return processed;
361 }
362
363
364 /*
365 * try to or force reclaim of transmitted buffers
366 */
367 static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
368 {
369 struct bcm_enet_priv *priv;
370 int released;
371
372 priv = netdev_priv(dev);
373 released = 0;
374
375 while (priv->tx_desc_count < priv->tx_ring_size) {
376 struct bcm_enet_desc *desc;
377 struct sk_buff *skb;
378
379 /* We run in a bh and fight against start_xmit, which
380 * is called with bh disabled */
381 spin_lock(&priv->tx_lock);
382
383 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
384
385 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
386 spin_unlock(&priv->tx_lock);
387 break;
388 }
389
390 /* ensure other field of the descriptor were not read
391 * before we checked ownership */
392 rmb();
393
394 skb = priv->tx_skb[priv->tx_dirty_desc];
395 priv->tx_skb[priv->tx_dirty_desc] = NULL;
396 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
397 DMA_TO_DEVICE);
398
399 priv->tx_dirty_desc++;
400 if (priv->tx_dirty_desc == priv->tx_ring_size)
401 priv->tx_dirty_desc = 0;
402 priv->tx_desc_count++;
403
404 spin_unlock(&priv->tx_lock);
405
406 if (desc->len_stat & DMADESC_UNDER_MASK)
407 priv->stats.tx_errors++;
408
409 dev_kfree_skb(skb);
410 released++;
411 }
412
413 if (netif_queue_stopped(dev) && released)
414 netif_wake_queue(dev);
415
416 return released;
417 }
418
419 /*
420 * poll func, called by network core
421 */
422 static int bcm_enet_poll(struct napi_struct *napi, int budget)
423 {
424 struct bcm_enet_priv *priv;
425 struct net_device *dev;
426 int tx_work_done, rx_work_done;
427
428 priv = container_of(napi, struct bcm_enet_priv, napi);
429 dev = priv->net_dev;
430
431 /* ack interrupts */
432 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
433 ENETDMA_IR_REG(priv->rx_chan));
434 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
435 ENETDMA_IR_REG(priv->tx_chan));
436
437 /* reclaim sent skb */
438 tx_work_done = bcm_enet_tx_reclaim(dev, 0);
439
440 spin_lock(&priv->rx_lock);
441 rx_work_done = bcm_enet_receive_queue(dev, budget);
442 spin_unlock(&priv->rx_lock);
443
444 if (rx_work_done >= budget || tx_work_done > 0) {
445 /* rx/tx queue is not yet empty/clean */
446 return rx_work_done;
447 }
448
449 /* no more packet in rx/tx queue, remove device from poll
450 * queue */
451 napi_complete(napi);
452
453 /* restore rx/tx interrupt */
454 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
455 ENETDMA_IRMASK_REG(priv->rx_chan));
456 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
457 ENETDMA_IRMASK_REG(priv->tx_chan));
458
459 return rx_work_done;
460 }
461
462 /*
463 * mac interrupt handler
464 */
465 static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
466 {
467 struct net_device *dev;
468 struct bcm_enet_priv *priv;
469 u32 stat;
470
471 dev = dev_id;
472 priv = netdev_priv(dev);
473
474 stat = enet_readl(priv, ENET_IR_REG);
475 if (!(stat & ENET_IR_MIB))
476 return IRQ_NONE;
477
478 /* clear & mask interrupt */
479 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
480 enet_writel(priv, 0, ENET_IRMASK_REG);
481
482 /* read mib registers in workqueue */
483 schedule_work(&priv->mib_update_task);
484
485 return IRQ_HANDLED;
486 }
487
488 /*
489 * rx/tx dma interrupt handler
490 */
491 static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
492 {
493 struct net_device *dev;
494 struct bcm_enet_priv *priv;
495
496 dev = dev_id;
497 priv = netdev_priv(dev);
498
499 /* mask rx/tx interrupts */
500 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
501 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
502
503 napi_schedule(&priv->napi);
504
505 return IRQ_HANDLED;
506 }
507
508 /*
509 * tx request callback
510 */
511 static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
512 {
513 struct bcm_enet_priv *priv;
514 struct bcm_enet_desc *desc;
515 u32 len_stat;
516 int ret;
517
518 priv = netdev_priv(dev);
519
520 /* lock against tx reclaim */
521 spin_lock(&priv->tx_lock);
522
523 /* make sure the tx hw queue is not full, should not happen
524 * since we stop queue before it's the case */
525 if (unlikely(!priv->tx_desc_count)) {
526 netif_stop_queue(dev);
527 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
528 "available?\n");
529 ret = NETDEV_TX_BUSY;
530 goto out_unlock;
531 }
532
533 /* point to the next available desc */
534 desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
535 priv->tx_skb[priv->tx_curr_desc] = skb;
536
537 /* fill descriptor */
538 desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
539 DMA_TO_DEVICE);
540
541 len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
542 len_stat |= DMADESC_ESOP_MASK |
543 DMADESC_APPEND_CRC |
544 DMADESC_OWNER_MASK;
545
546 priv->tx_curr_desc++;
547 if (priv->tx_curr_desc == priv->tx_ring_size) {
548 priv->tx_curr_desc = 0;
549 len_stat |= DMADESC_WRAP_MASK;
550 }
551 priv->tx_desc_count--;
552
553 /* dma might be already polling, make sure we update desc
554 * fields in correct order */
555 wmb();
556 desc->len_stat = len_stat;
557 wmb();
558
559 /* kick tx dma */
560 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
561 ENETDMA_CHANCFG_REG(priv->tx_chan));
562
563 /* stop queue if no more desc available */
564 if (!priv->tx_desc_count)
565 netif_stop_queue(dev);
566
567 priv->stats.tx_bytes += skb->len;
568 priv->stats.tx_packets++;
569 dev->trans_start = jiffies;
570 ret = NETDEV_TX_OK;
571
572 out_unlock:
573 spin_unlock(&priv->tx_lock);
574 return ret;
575 }
576
577 /*
578 * Change the interface's mac address.
579 */
580 static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
581 {
582 struct bcm_enet_priv *priv;
583 struct sockaddr *addr = p;
584 u32 val;
585
586 priv = netdev_priv(dev);
587 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
588
589 /* use perfect match register 0 to store my mac address */
590 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
591 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
592 enet_writel(priv, val, ENET_PML_REG(0));
593
594 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
595 val |= ENET_PMH_DATAVALID_MASK;
596 enet_writel(priv, val, ENET_PMH_REG(0));
597
598 return 0;
599 }
600
601 /*
602 * Change rx mode (promiscous/allmulti) and update multicast list
603 */
604 static void bcm_enet_set_multicast_list(struct net_device *dev)
605 {
606 struct bcm_enet_priv *priv;
607 struct dev_mc_list *mc_list;
608 u32 val;
609 int i;
610
611 priv = netdev_priv(dev);
612
613 val = enet_readl(priv, ENET_RXCFG_REG);
614
615 if (dev->flags & IFF_PROMISC)
616 val |= ENET_RXCFG_PROMISC_MASK;
617 else
618 val &= ~ENET_RXCFG_PROMISC_MASK;
619
620 /* only 3 perfect match registers left, first one is used for
621 * own mac address */
622 if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > 3)
623 val |= ENET_RXCFG_ALLMCAST_MASK;
624 else
625 val &= ~ENET_RXCFG_ALLMCAST_MASK;
626
627 /* no need to set perfect match registers if we catch all
628 * multicast */
629 if (val & ENET_RXCFG_ALLMCAST_MASK) {
630 enet_writel(priv, val, ENET_RXCFG_REG);
631 return;
632 }
633
634 for (i = 0, mc_list = dev->mc_list;
635 (mc_list != NULL) && (i < dev->mc_count) && (i < 3);
636 i++, mc_list = mc_list->next) {
637 u8 *dmi_addr;
638 u32 tmp;
639
640 /* filter non ethernet address */
641 if (mc_list->dmi_addrlen != 6)
642 continue;
643
644 /* update perfect match registers */
645 dmi_addr = mc_list->dmi_addr;
646 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
647 (dmi_addr[4] << 8) | dmi_addr[5];
648 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
649
650 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
651 tmp |= ENET_PMH_DATAVALID_MASK;
652 enet_writel(priv, tmp, ENET_PMH_REG(i + 1));
653 }
654
655 for (; i < 3; i++) {
656 enet_writel(priv, 0, ENET_PML_REG(i + 1));
657 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
658 }
659
660 enet_writel(priv, val, ENET_RXCFG_REG);
661 }
662
663 /*
664 * set mac duplex parameters
665 */
666 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
667 {
668 u32 val;
669
670 val = enet_readl(priv, ENET_TXCTL_REG);
671 if (fullduplex)
672 val |= ENET_TXCTL_FD_MASK;
673 else
674 val &= ~ENET_TXCTL_FD_MASK;
675 enet_writel(priv, val, ENET_TXCTL_REG);
676 }
677
678 /*
679 * set mac flow control parameters
680 */
681 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
682 {
683 u32 val;
684
685 /* rx flow control (pause frame handling) */
686 val = enet_readl(priv, ENET_RXCFG_REG);
687 if (rx_en)
688 val |= ENET_RXCFG_ENFLOW_MASK;
689 else
690 val &= ~ENET_RXCFG_ENFLOW_MASK;
691 enet_writel(priv, val, ENET_RXCFG_REG);
692
693 /* tx flow control (pause frame generation) */
694 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
695 if (tx_en)
696 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
697 else
698 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
699 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
700 }
701
702 /*
703 * link changed callback (from phylib)
704 */
705 static void bcm_enet_adjust_phy_link(struct net_device *dev)
706 {
707 struct bcm_enet_priv *priv;
708 struct phy_device *phydev;
709 int status_changed;
710
711 priv = netdev_priv(dev);
712 phydev = priv->phydev;
713 status_changed = 0;
714
715 if (priv->old_link != phydev->link) {
716 status_changed = 1;
717 priv->old_link = phydev->link;
718 }
719
720 /* reflect duplex change in mac configuration */
721 if (phydev->link && phydev->duplex != priv->old_duplex) {
722 bcm_enet_set_duplex(priv,
723 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
724 status_changed = 1;
725 priv->old_duplex = phydev->duplex;
726 }
727
728 /* enable flow control if remote advertise it (trust phylib to
729 * check that duplex is full */
730 if (phydev->link && phydev->pause != priv->old_pause) {
731 int rx_pause_en, tx_pause_en;
732
733 if (phydev->pause) {
734 /* pause was advertised by lpa and us */
735 rx_pause_en = 1;
736 tx_pause_en = 1;
737 } else if (!priv->pause_auto) {
738 /* pause setting overrided by user */
739 rx_pause_en = priv->pause_rx;
740 tx_pause_en = priv->pause_tx;
741 } else {
742 rx_pause_en = 0;
743 tx_pause_en = 0;
744 }
745
746 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
747 status_changed = 1;
748 priv->old_pause = phydev->pause;
749 }
750
751 if (status_changed) {
752 pr_info("%s: link %s", dev->name, phydev->link ?
753 "UP" : "DOWN");
754 if (phydev->link)
755 pr_cont(" - %d/%s - flow control %s", phydev->speed,
756 DUPLEX_FULL == phydev->duplex ? "full" : "half",
757 phydev->pause == 1 ? "rx&tx" : "off");
758
759 pr_cont("\n");
760 }
761 }
762
763 /*
764 * link changed callback (if phylib is not used)
765 */
766 static void bcm_enet_adjust_link(struct net_device *dev)
767 {
768 struct bcm_enet_priv *priv;
769
770 priv = netdev_priv(dev);
771 bcm_enet_set_duplex(priv, priv->force_duplex_full);
772 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
773 netif_carrier_on(dev);
774
775 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
776 dev->name,
777 priv->force_speed_100 ? 100 : 10,
778 priv->force_duplex_full ? "full" : "half",
779 priv->pause_rx ? "rx" : "off",
780 priv->pause_tx ? "tx" : "off");
781 }
782
783 /*
784 * open callback, allocate dma rings & buffers and start rx operation
785 */
786 static int bcm_enet_open(struct net_device *dev)
787 {
788 struct bcm_enet_priv *priv;
789 struct sockaddr addr;
790 struct device *kdev;
791 struct phy_device *phydev;
792 int i, ret;
793 unsigned int size;
794 char phy_id[MII_BUS_ID_SIZE + 3];
795 void *p;
796 u32 val;
797
798 priv = netdev_priv(dev);
799 kdev = &priv->pdev->dev;
800
801 if (priv->has_phy) {
802 /* connect to PHY */
803 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
804 priv->mac_id ? "1" : "0", priv->phy_id);
805
806 phydev = phy_connect(dev, phy_id, &bcm_enet_adjust_phy_link, 0,
807 PHY_INTERFACE_MODE_MII);
808
809 if (IS_ERR(phydev)) {
810 dev_err(kdev, "could not attach to PHY\n");
811 return PTR_ERR(phydev);
812 }
813
814 /* mask with MAC supported features */
815 phydev->supported &= (SUPPORTED_10baseT_Half |
816 SUPPORTED_10baseT_Full |
817 SUPPORTED_100baseT_Half |
818 SUPPORTED_100baseT_Full |
819 SUPPORTED_Autoneg |
820 SUPPORTED_Pause |
821 SUPPORTED_MII);
822 phydev->advertising = phydev->supported;
823
824 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
825 phydev->advertising |= SUPPORTED_Pause;
826 else
827 phydev->advertising &= ~SUPPORTED_Pause;
828
829 dev_info(kdev, "attached PHY at address %d [%s]\n",
830 phydev->addr, phydev->drv->name);
831
832 priv->old_link = 0;
833 priv->old_duplex = -1;
834 priv->old_pause = -1;
835 priv->phydev = phydev;
836 }
837
838 /* mask all interrupts and request them */
839 enet_writel(priv, 0, ENET_IRMASK_REG);
840 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
841 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
842
843 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
844 if (ret)
845 goto out_phy_disconnect;
846
847 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
848 IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev);
849 if (ret)
850 goto out_freeirq;
851
852 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
853 IRQF_DISABLED, dev->name, dev);
854 if (ret)
855 goto out_freeirq_rx;
856
857 /* initialize perfect match registers */
858 for (i = 0; i < 4; i++) {
859 enet_writel(priv, 0, ENET_PML_REG(i));
860 enet_writel(priv, 0, ENET_PMH_REG(i));
861 }
862
863 /* write device mac address */
864 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
865 bcm_enet_set_mac_address(dev, &addr);
866
867 /* allocate rx dma ring */
868 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
869 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
870 if (!p) {
871 dev_err(kdev, "cannot allocate rx ring %u\n", size);
872 ret = -ENOMEM;
873 goto out_freeirq_tx;
874 }
875
876 memset(p, 0, size);
877 priv->rx_desc_alloc_size = size;
878 priv->rx_desc_cpu = p;
879
880 /* allocate tx dma ring */
881 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
882 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
883 if (!p) {
884 dev_err(kdev, "cannot allocate tx ring\n");
885 ret = -ENOMEM;
886 goto out_free_rx_ring;
887 }
888
889 memset(p, 0, size);
890 priv->tx_desc_alloc_size = size;
891 priv->tx_desc_cpu = p;
892
893 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
894 GFP_KERNEL);
895 if (!priv->tx_skb) {
896 dev_err(kdev, "cannot allocate rx skb queue\n");
897 ret = -ENOMEM;
898 goto out_free_tx_ring;
899 }
900
901 priv->tx_desc_count = priv->tx_ring_size;
902 priv->tx_dirty_desc = 0;
903 priv->tx_curr_desc = 0;
904 spin_lock_init(&priv->tx_lock);
905
906 /* init & fill rx ring with skbs */
907 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
908 GFP_KERNEL);
909 if (!priv->rx_skb) {
910 dev_err(kdev, "cannot allocate rx skb queue\n");
911 ret = -ENOMEM;
912 goto out_free_tx_skb;
913 }
914
915 priv->rx_desc_count = 0;
916 priv->rx_dirty_desc = 0;
917 priv->rx_curr_desc = 0;
918
919 /* initialize flow control buffer allocation */
920 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
921 ENETDMA_BUFALLOC_REG(priv->rx_chan));
922
923 if (bcm_enet_refill_rx(dev)) {
924 dev_err(kdev, "cannot allocate rx skb queue\n");
925 ret = -ENOMEM;
926 goto out;
927 }
928
929 /* write rx & tx ring addresses */
930 enet_dma_writel(priv, priv->rx_desc_dma,
931 ENETDMA_RSTART_REG(priv->rx_chan));
932 enet_dma_writel(priv, priv->tx_desc_dma,
933 ENETDMA_RSTART_REG(priv->tx_chan));
934
935 /* clear remaining state ram for rx & tx channel */
936 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
937 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
938 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
939 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
940 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
941 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
942
943 /* set max rx/tx length */
944 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
945 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
946
947 /* set dma maximum burst len */
948 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
949 ENETDMA_MAXBURST_REG(priv->rx_chan));
950 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
951 ENETDMA_MAXBURST_REG(priv->tx_chan));
952
953 /* set correct transmit fifo watermark */
954 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
955
956 /* set flow control low/high threshold to 1/3 / 2/3 */
957 val = priv->rx_ring_size / 3;
958 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
959 val = (priv->rx_ring_size * 2) / 3;
960 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
961
962 /* all set, enable mac and interrupts, start dma engine and
963 * kick rx dma channel */
964 wmb();
965 enet_writel(priv, ENET_CTL_ENABLE_MASK, ENET_CTL_REG);
966 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
967 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
968 ENETDMA_CHANCFG_REG(priv->rx_chan));
969
970 /* watch "mib counters about to overflow" interrupt */
971 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
972 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
973
974 /* watch "packet transferred" interrupt in rx and tx */
975 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
976 ENETDMA_IR_REG(priv->rx_chan));
977 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
978 ENETDMA_IR_REG(priv->tx_chan));
979
980 /* make sure we enable napi before rx interrupt */
981 napi_enable(&priv->napi);
982
983 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
984 ENETDMA_IRMASK_REG(priv->rx_chan));
985 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
986 ENETDMA_IRMASK_REG(priv->tx_chan));
987
988 if (priv->has_phy)
989 phy_start(priv->phydev);
990 else
991 bcm_enet_adjust_link(dev);
992
993 netif_start_queue(dev);
994 return 0;
995
996 out:
997 for (i = 0; i < priv->rx_ring_size; i++) {
998 struct bcm_enet_desc *desc;
999
1000 if (!priv->rx_skb[i])
1001 continue;
1002
1003 desc = &priv->rx_desc_cpu[i];
1004 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1005 DMA_FROM_DEVICE);
1006 kfree_skb(priv->rx_skb[i]);
1007 }
1008 kfree(priv->rx_skb);
1009
1010 out_free_tx_skb:
1011 kfree(priv->tx_skb);
1012
1013 out_free_tx_ring:
1014 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1015 priv->tx_desc_cpu, priv->tx_desc_dma);
1016
1017 out_free_rx_ring:
1018 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1019 priv->rx_desc_cpu, priv->rx_desc_dma);
1020
1021 out_freeirq_tx:
1022 free_irq(priv->irq_tx, dev);
1023
1024 out_freeirq_rx:
1025 free_irq(priv->irq_rx, dev);
1026
1027 out_freeirq:
1028 free_irq(dev->irq, dev);
1029
1030 out_phy_disconnect:
1031 phy_disconnect(priv->phydev);
1032
1033 return ret;
1034 }
1035
1036 /*
1037 * disable mac
1038 */
1039 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1040 {
1041 int limit;
1042 u32 val;
1043
1044 val = enet_readl(priv, ENET_CTL_REG);
1045 val |= ENET_CTL_DISABLE_MASK;
1046 enet_writel(priv, val, ENET_CTL_REG);
1047
1048 limit = 1000;
1049 do {
1050 u32 val;
1051
1052 val = enet_readl(priv, ENET_CTL_REG);
1053 if (!(val & ENET_CTL_DISABLE_MASK))
1054 break;
1055 udelay(1);
1056 } while (limit--);
1057 }
1058
1059 /*
1060 * disable dma in given channel
1061 */
1062 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1063 {
1064 int limit;
1065
1066 enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
1067
1068 limit = 1000;
1069 do {
1070 u32 val;
1071
1072 val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
1073 if (!(val & ENETDMA_CHANCFG_EN_MASK))
1074 break;
1075 udelay(1);
1076 } while (limit--);
1077 }
1078
1079 /*
1080 * stop callback
1081 */
1082 static int bcm_enet_stop(struct net_device *dev)
1083 {
1084 struct bcm_enet_priv *priv;
1085 struct device *kdev;
1086 int i;
1087
1088 priv = netdev_priv(dev);
1089 kdev = &priv->pdev->dev;
1090
1091 netif_stop_queue(dev);
1092 napi_disable(&priv->napi);
1093 if (priv->has_phy)
1094 phy_stop(priv->phydev);
1095 del_timer_sync(&priv->rx_timeout);
1096
1097 /* mask all interrupts */
1098 enet_writel(priv, 0, ENET_IRMASK_REG);
1099 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
1100 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
1101
1102 /* make sure no mib update is scheduled */
1103 flush_scheduled_work();
1104
1105 /* disable dma & mac */
1106 bcm_enet_disable_dma(priv, priv->tx_chan);
1107 bcm_enet_disable_dma(priv, priv->rx_chan);
1108 bcm_enet_disable_mac(priv);
1109
1110 /* force reclaim of all tx buffers */
1111 bcm_enet_tx_reclaim(dev, 1);
1112
1113 /* free the rx skb ring */
1114 for (i = 0; i < priv->rx_ring_size; i++) {
1115 struct bcm_enet_desc *desc;
1116
1117 if (!priv->rx_skb[i])
1118 continue;
1119
1120 desc = &priv->rx_desc_cpu[i];
1121 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1122 DMA_FROM_DEVICE);
1123 kfree_skb(priv->rx_skb[i]);
1124 }
1125
1126 /* free remaining allocated memory */
1127 kfree(priv->rx_skb);
1128 kfree(priv->tx_skb);
1129 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1130 priv->rx_desc_cpu, priv->rx_desc_dma);
1131 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1132 priv->tx_desc_cpu, priv->tx_desc_dma);
1133 free_irq(priv->irq_tx, dev);
1134 free_irq(priv->irq_rx, dev);
1135 free_irq(dev->irq, dev);
1136
1137 /* release phy */
1138 if (priv->has_phy) {
1139 phy_disconnect(priv->phydev);
1140 priv->phydev = NULL;
1141 }
1142
1143 return 0;
1144 }
1145
1146 /*
1147 * core request to return device rx/tx stats
1148 */
1149 static struct net_device_stats *bcm_enet_get_stats(struct net_device *dev)
1150 {
1151 struct bcm_enet_priv *priv;
1152
1153 priv = netdev_priv(dev);
1154 return &priv->stats;
1155 }
1156
1157 /*
1158 * ethtool callbacks
1159 */
1160 struct bcm_enet_stats {
1161 char stat_string[ETH_GSTRING_LEN];
1162 int sizeof_stat;
1163 int stat_offset;
1164 int mib_reg;
1165 };
1166
1167 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1168 offsetof(struct bcm_enet_priv, m)
1169
1170 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1171 { "rx_packets", GEN_STAT(stats.rx_packets), -1 },
1172 { "tx_packets", GEN_STAT(stats.tx_packets), -1 },
1173 { "rx_bytes", GEN_STAT(stats.rx_bytes), -1 },
1174 { "tx_bytes", GEN_STAT(stats.tx_bytes), -1 },
1175 { "rx_errors", GEN_STAT(stats.rx_errors), -1 },
1176 { "tx_errors", GEN_STAT(stats.tx_errors), -1 },
1177 { "rx_dropped", GEN_STAT(stats.rx_dropped), -1 },
1178 { "tx_dropped", GEN_STAT(stats.tx_dropped), -1 },
1179
1180 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1181 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1182 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1183 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1184 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1185 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1186 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1187 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1188 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1189 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1190 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1191 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1192 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1193 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1194 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1195 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1196 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1197 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1198 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1199 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1200 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1201
1202 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1203 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1204 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1205 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1206 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1207 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1208 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1209 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1210 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1211 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1212 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1213 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1214 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1215 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1216 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1217 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1218 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1219 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1220 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1221 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1222 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1223 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1224
1225 };
1226
1227 #define BCM_ENET_STATS_LEN \
1228 (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
1229
1230 static const u32 unused_mib_regs[] = {
1231 ETH_MIB_TX_ALL_OCTETS,
1232 ETH_MIB_TX_ALL_PKTS,
1233 ETH_MIB_RX_ALL_OCTETS,
1234 ETH_MIB_RX_ALL_PKTS,
1235 };
1236
1237
1238 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1239 struct ethtool_drvinfo *drvinfo)
1240 {
1241 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
1242 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
1243 strncpy(drvinfo->fw_version, "N/A", 32);
1244 strncpy(drvinfo->bus_info, "bcm63xx", 32);
1245 drvinfo->n_stats = BCM_ENET_STATS_LEN;
1246 }
1247
1248 static int bcm_enet_get_sset_count(struct net_device *netdev,
1249 int string_set)
1250 {
1251 switch (string_set) {
1252 case ETH_SS_STATS:
1253 return BCM_ENET_STATS_LEN;
1254 default:
1255 return -EINVAL;
1256 }
1257 }
1258
1259 static void bcm_enet_get_strings(struct net_device *netdev,
1260 u32 stringset, u8 *data)
1261 {
1262 int i;
1263
1264 switch (stringset) {
1265 case ETH_SS_STATS:
1266 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1267 memcpy(data + i * ETH_GSTRING_LEN,
1268 bcm_enet_gstrings_stats[i].stat_string,
1269 ETH_GSTRING_LEN);
1270 }
1271 break;
1272 }
1273 }
1274
1275 static void update_mib_counters(struct bcm_enet_priv *priv)
1276 {
1277 int i;
1278
1279 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1280 const struct bcm_enet_stats *s;
1281 u32 val;
1282 char *p;
1283
1284 s = &bcm_enet_gstrings_stats[i];
1285 if (s->mib_reg == -1)
1286 continue;
1287
1288 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1289 p = (char *)priv + s->stat_offset;
1290
1291 if (s->sizeof_stat == sizeof(u64))
1292 *(u64 *)p += val;
1293 else
1294 *(u32 *)p += val;
1295 }
1296
1297 /* also empty unused mib counters to make sure mib counter
1298 * overflow interrupt is cleared */
1299 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1300 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1301 }
1302
1303 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1304 {
1305 struct bcm_enet_priv *priv;
1306
1307 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1308 mutex_lock(&priv->mib_update_lock);
1309 update_mib_counters(priv);
1310 mutex_unlock(&priv->mib_update_lock);
1311
1312 /* reenable mib interrupt */
1313 if (netif_running(priv->net_dev))
1314 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1315 }
1316
1317 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1318 struct ethtool_stats *stats,
1319 u64 *data)
1320 {
1321 struct bcm_enet_priv *priv;
1322 int i;
1323
1324 priv = netdev_priv(netdev);
1325
1326 mutex_lock(&priv->mib_update_lock);
1327 update_mib_counters(priv);
1328
1329 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1330 const struct bcm_enet_stats *s;
1331 char *p;
1332
1333 s = &bcm_enet_gstrings_stats[i];
1334 p = (char *)priv + s->stat_offset;
1335 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1336 *(u64 *)p : *(u32 *)p;
1337 }
1338 mutex_unlock(&priv->mib_update_lock);
1339 }
1340
1341 static int bcm_enet_get_settings(struct net_device *dev,
1342 struct ethtool_cmd *cmd)
1343 {
1344 struct bcm_enet_priv *priv;
1345
1346 priv = netdev_priv(dev);
1347
1348 cmd->maxrxpkt = 0;
1349 cmd->maxtxpkt = 0;
1350
1351 if (priv->has_phy) {
1352 if (!priv->phydev)
1353 return -ENODEV;
1354 return phy_ethtool_gset(priv->phydev, cmd);
1355 } else {
1356 cmd->autoneg = 0;
1357 cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
1358 cmd->duplex = (priv->force_duplex_full) ?
1359 DUPLEX_FULL : DUPLEX_HALF;
1360 cmd->supported = ADVERTISED_10baseT_Half |
1361 ADVERTISED_10baseT_Full |
1362 ADVERTISED_100baseT_Half |
1363 ADVERTISED_100baseT_Full;
1364 cmd->advertising = 0;
1365 cmd->port = PORT_MII;
1366 cmd->transceiver = XCVR_EXTERNAL;
1367 }
1368 return 0;
1369 }
1370
1371 static int bcm_enet_set_settings(struct net_device *dev,
1372 struct ethtool_cmd *cmd)
1373 {
1374 struct bcm_enet_priv *priv;
1375
1376 priv = netdev_priv(dev);
1377 if (priv->has_phy) {
1378 if (!priv->phydev)
1379 return -ENODEV;
1380 return phy_ethtool_sset(priv->phydev, cmd);
1381 } else {
1382
1383 if (cmd->autoneg ||
1384 (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1385 cmd->port != PORT_MII)
1386 return -EINVAL;
1387
1388 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1389 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1390
1391 if (netif_running(dev))
1392 bcm_enet_adjust_link(dev);
1393 return 0;
1394 }
1395 }
1396
1397 static void bcm_enet_get_ringparam(struct net_device *dev,
1398 struct ethtool_ringparam *ering)
1399 {
1400 struct bcm_enet_priv *priv;
1401
1402 priv = netdev_priv(dev);
1403
1404 /* rx/tx ring is actually only limited by memory */
1405 ering->rx_max_pending = 8192;
1406 ering->tx_max_pending = 8192;
1407 ering->rx_mini_max_pending = 0;
1408 ering->rx_jumbo_max_pending = 0;
1409 ering->rx_pending = priv->rx_ring_size;
1410 ering->tx_pending = priv->tx_ring_size;
1411 }
1412
1413 static int bcm_enet_set_ringparam(struct net_device *dev,
1414 struct ethtool_ringparam *ering)
1415 {
1416 struct bcm_enet_priv *priv;
1417 int was_running;
1418
1419 priv = netdev_priv(dev);
1420
1421 was_running = 0;
1422 if (netif_running(dev)) {
1423 bcm_enet_stop(dev);
1424 was_running = 1;
1425 }
1426
1427 priv->rx_ring_size = ering->rx_pending;
1428 priv->tx_ring_size = ering->tx_pending;
1429
1430 if (was_running) {
1431 int err;
1432
1433 err = bcm_enet_open(dev);
1434 if (err)
1435 dev_close(dev);
1436 else
1437 bcm_enet_set_multicast_list(dev);
1438 }
1439 return 0;
1440 }
1441
1442 static void bcm_enet_get_pauseparam(struct net_device *dev,
1443 struct ethtool_pauseparam *ecmd)
1444 {
1445 struct bcm_enet_priv *priv;
1446
1447 priv = netdev_priv(dev);
1448 ecmd->autoneg = priv->pause_auto;
1449 ecmd->rx_pause = priv->pause_rx;
1450 ecmd->tx_pause = priv->pause_tx;
1451 }
1452
1453 static int bcm_enet_set_pauseparam(struct net_device *dev,
1454 struct ethtool_pauseparam *ecmd)
1455 {
1456 struct bcm_enet_priv *priv;
1457
1458 priv = netdev_priv(dev);
1459
1460 if (priv->has_phy) {
1461 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1462 /* asymetric pause mode not supported,
1463 * actually possible but integrated PHY has RO
1464 * asym_pause bit */
1465 return -EINVAL;
1466 }
1467 } else {
1468 /* no pause autoneg on direct mii connection */
1469 if (ecmd->autoneg)
1470 return -EINVAL;
1471 }
1472
1473 priv->pause_auto = ecmd->autoneg;
1474 priv->pause_rx = ecmd->rx_pause;
1475 priv->pause_tx = ecmd->tx_pause;
1476
1477 return 0;
1478 }
1479
1480 static struct ethtool_ops bcm_enet_ethtool_ops = {
1481 .get_strings = bcm_enet_get_strings,
1482 .get_sset_count = bcm_enet_get_sset_count,
1483 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1484 .get_settings = bcm_enet_get_settings,
1485 .set_settings = bcm_enet_set_settings,
1486 .get_drvinfo = bcm_enet_get_drvinfo,
1487 .get_link = ethtool_op_get_link,
1488 .get_ringparam = bcm_enet_get_ringparam,
1489 .set_ringparam = bcm_enet_set_ringparam,
1490 .get_pauseparam = bcm_enet_get_pauseparam,
1491 .set_pauseparam = bcm_enet_set_pauseparam,
1492 };
1493
1494 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1495 {
1496 struct bcm_enet_priv *priv;
1497
1498 priv = netdev_priv(dev);
1499 if (priv->has_phy) {
1500 if (!priv->phydev)
1501 return -ENODEV;
1502 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
1503 } else {
1504 struct mii_if_info mii;
1505
1506 mii.dev = dev;
1507 mii.mdio_read = bcm_enet_mdio_read_mii;
1508 mii.mdio_write = bcm_enet_mdio_write_mii;
1509 mii.phy_id = 0;
1510 mii.phy_id_mask = 0x3f;
1511 mii.reg_num_mask = 0x1f;
1512 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1513 }
1514 }
1515
1516 /*
1517 * calculate actual hardware mtu
1518 */
1519 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1520 {
1521 int actual_mtu;
1522
1523 actual_mtu = mtu;
1524
1525 /* add ethernet header + vlan tag size */
1526 actual_mtu += VLAN_ETH_HLEN;
1527
1528 if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1529 return -EINVAL;
1530
1531 /*
1532 * setup maximum size before we get overflow mark in
1533 * descriptor, note that this will not prevent reception of
1534 * big frames, they will be split into multiple buffers
1535 * anyway
1536 */
1537 priv->hw_mtu = actual_mtu;
1538
1539 /*
1540 * align rx buffer size to dma burst len, account FCS since
1541 * it's appended
1542 */
1543 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1544 BCMENET_DMA_MAXBURST * 4);
1545 return 0;
1546 }
1547
1548 /*
1549 * adjust mtu, can't be called while device is running
1550 */
1551 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1552 {
1553 int ret;
1554
1555 if (netif_running(dev))
1556 return -EBUSY;
1557
1558 ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1559 if (ret)
1560 return ret;
1561 dev->mtu = new_mtu;
1562 return 0;
1563 }
1564
1565 /*
1566 * preinit hardware to allow mii operation while device is down
1567 */
1568 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1569 {
1570 u32 val;
1571 int limit;
1572
1573 /* make sure mac is disabled */
1574 bcm_enet_disable_mac(priv);
1575
1576 /* soft reset mac */
1577 val = ENET_CTL_SRESET_MASK;
1578 enet_writel(priv, val, ENET_CTL_REG);
1579 wmb();
1580
1581 limit = 1000;
1582 do {
1583 val = enet_readl(priv, ENET_CTL_REG);
1584 if (!(val & ENET_CTL_SRESET_MASK))
1585 break;
1586 udelay(1);
1587 } while (limit--);
1588
1589 /* select correct mii interface */
1590 val = enet_readl(priv, ENET_CTL_REG);
1591 if (priv->use_external_mii)
1592 val |= ENET_CTL_EPHYSEL_MASK;
1593 else
1594 val &= ~ENET_CTL_EPHYSEL_MASK;
1595 enet_writel(priv, val, ENET_CTL_REG);
1596
1597 /* turn on mdc clock */
1598 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1599 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1600
1601 /* set mib counters to self-clear when read */
1602 val = enet_readl(priv, ENET_MIBCTL_REG);
1603 val |= ENET_MIBCTL_RDCLEAR_MASK;
1604 enet_writel(priv, val, ENET_MIBCTL_REG);
1605 }
1606
1607 static const struct net_device_ops bcm_enet_ops = {
1608 .ndo_open = bcm_enet_open,
1609 .ndo_stop = bcm_enet_stop,
1610 .ndo_start_xmit = bcm_enet_start_xmit,
1611 .ndo_get_stats = bcm_enet_get_stats,
1612 .ndo_set_mac_address = bcm_enet_set_mac_address,
1613 .ndo_set_multicast_list = bcm_enet_set_multicast_list,
1614 .ndo_do_ioctl = bcm_enet_ioctl,
1615 .ndo_change_mtu = bcm_enet_change_mtu,
1616 #ifdef CONFIG_NET_POLL_CONTROLLER
1617 .ndo_poll_controller = bcm_enet_netpoll,
1618 #endif
1619 };
1620
1621 /*
1622 * allocate netdevice, request register memory and register device.
1623 */
1624 static int __devinit bcm_enet_probe(struct platform_device *pdev)
1625 {
1626 struct bcm_enet_priv *priv;
1627 struct net_device *dev;
1628 struct bcm63xx_enet_platform_data *pd;
1629 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1630 struct mii_bus *bus;
1631 const char *clk_name;
1632 unsigned int iomem_size;
1633 int i, ret;
1634
1635 /* stop if shared driver failed, assume driver->probe will be
1636 * called in the same order we register devices (correct ?) */
1637 if (!bcm_enet_shared_base)
1638 return -ENODEV;
1639
1640 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1641 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1642 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1643 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1644 if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
1645 return -ENODEV;
1646
1647 ret = 0;
1648 dev = alloc_etherdev(sizeof(*priv));
1649 if (!dev)
1650 return -ENOMEM;
1651 priv = netdev_priv(dev);
1652 memset(priv, 0, sizeof(*priv));
1653
1654 ret = compute_hw_mtu(priv, dev->mtu);
1655 if (ret)
1656 goto out;
1657
1658 iomem_size = res_mem->end - res_mem->start + 1;
1659 if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
1660 ret = -EBUSY;
1661 goto out;
1662 }
1663
1664 priv->base = ioremap(res_mem->start, iomem_size);
1665 if (priv->base == NULL) {
1666 ret = -ENOMEM;
1667 goto out_release_mem;
1668 }
1669 dev->irq = priv->irq = res_irq->start;
1670 priv->irq_rx = res_irq_rx->start;
1671 priv->irq_tx = res_irq_tx->start;
1672 priv->mac_id = pdev->id;
1673
1674 /* get rx & tx dma channel id for this mac */
1675 if (priv->mac_id == 0) {
1676 priv->rx_chan = 0;
1677 priv->tx_chan = 1;
1678 clk_name = "enet0";
1679 } else {
1680 priv->rx_chan = 2;
1681 priv->tx_chan = 3;
1682 clk_name = "enet1";
1683 }
1684
1685 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1686 if (IS_ERR(priv->mac_clk)) {
1687 ret = PTR_ERR(priv->mac_clk);
1688 goto out_unmap;
1689 }
1690 clk_enable(priv->mac_clk);
1691
1692 /* initialize default and fetch platform data */
1693 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1694 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1695
1696 pd = pdev->dev.platform_data;
1697 if (pd) {
1698 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1699 priv->has_phy = pd->has_phy;
1700 priv->phy_id = pd->phy_id;
1701 priv->has_phy_interrupt = pd->has_phy_interrupt;
1702 priv->phy_interrupt = pd->phy_interrupt;
1703 priv->use_external_mii = !pd->use_internal_phy;
1704 priv->pause_auto = pd->pause_auto;
1705 priv->pause_rx = pd->pause_rx;
1706 priv->pause_tx = pd->pause_tx;
1707 priv->force_duplex_full = pd->force_duplex_full;
1708 priv->force_speed_100 = pd->force_speed_100;
1709 }
1710
1711 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1712 /* using internal PHY, enable clock */
1713 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1714 if (IS_ERR(priv->phy_clk)) {
1715 ret = PTR_ERR(priv->phy_clk);
1716 priv->phy_clk = NULL;
1717 goto out_put_clk_mac;
1718 }
1719 clk_enable(priv->phy_clk);
1720 }
1721
1722 /* do minimal hardware init to be able to probe mii bus */
1723 bcm_enet_hw_preinit(priv);
1724
1725 /* MII bus registration */
1726 if (priv->has_phy) {
1727
1728 priv->mii_bus = mdiobus_alloc();
1729 if (!priv->mii_bus) {
1730 ret = -ENOMEM;
1731 goto out_uninit_hw;
1732 }
1733
1734 bus = priv->mii_bus;
1735 bus->name = "bcm63xx_enet MII bus";
1736 bus->parent = &pdev->dev;
1737 bus->priv = priv;
1738 bus->read = bcm_enet_mdio_read_phylib;
1739 bus->write = bcm_enet_mdio_write_phylib;
1740 sprintf(bus->id, "%d", priv->mac_id);
1741
1742 /* only probe bus where we think the PHY is, because
1743 * the mdio read operation return 0 instead of 0xffff
1744 * if a slave is not present on hw */
1745 bus->phy_mask = ~(1 << priv->phy_id);
1746
1747 bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
1748 if (!bus->irq) {
1749 ret = -ENOMEM;
1750 goto out_free_mdio;
1751 }
1752
1753 if (priv->has_phy_interrupt)
1754 bus->irq[priv->phy_id] = priv->phy_interrupt;
1755 else
1756 bus->irq[priv->phy_id] = PHY_POLL;
1757
1758 ret = mdiobus_register(bus);
1759 if (ret) {
1760 dev_err(&pdev->dev, "unable to register mdio bus\n");
1761 goto out_free_mdio;
1762 }
1763 } else {
1764
1765 /* run platform code to initialize PHY device */
1766 if (pd->mii_config &&
1767 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1768 bcm_enet_mdio_write_mii)) {
1769 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1770 goto out_uninit_hw;
1771 }
1772 }
1773
1774 spin_lock_init(&priv->rx_lock);
1775
1776 /* init rx timeout (used for oom) */
1777 init_timer(&priv->rx_timeout);
1778 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1779 priv->rx_timeout.data = (unsigned long)dev;
1780
1781 /* init the mib update lock&work */
1782 mutex_init(&priv->mib_update_lock);
1783 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1784
1785 /* zero mib counters */
1786 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1787 enet_writel(priv, 0, ENET_MIB_REG(i));
1788
1789 /* register netdevice */
1790 dev->netdev_ops = &bcm_enet_ops;
1791 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1792
1793 SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
1794 SET_NETDEV_DEV(dev, &pdev->dev);
1795
1796 ret = register_netdev(dev);
1797 if (ret)
1798 goto out_unregister_mdio;
1799
1800 netif_carrier_off(dev);
1801 platform_set_drvdata(pdev, dev);
1802 priv->pdev = pdev;
1803 priv->net_dev = dev;
1804
1805 return 0;
1806
1807 out_unregister_mdio:
1808 if (priv->mii_bus) {
1809 mdiobus_unregister(priv->mii_bus);
1810 kfree(priv->mii_bus->irq);
1811 }
1812
1813 out_free_mdio:
1814 if (priv->mii_bus)
1815 mdiobus_free(priv->mii_bus);
1816
1817 out_uninit_hw:
1818 /* turn off mdc clock */
1819 enet_writel(priv, 0, ENET_MIISC_REG);
1820 if (priv->phy_clk) {
1821 clk_disable(priv->phy_clk);
1822 clk_put(priv->phy_clk);
1823 }
1824
1825 out_put_clk_mac:
1826 clk_disable(priv->mac_clk);
1827 clk_put(priv->mac_clk);
1828
1829 out_unmap:
1830 iounmap(priv->base);
1831
1832 out_release_mem:
1833 release_mem_region(res_mem->start, iomem_size);
1834 out:
1835 free_netdev(dev);
1836 return ret;
1837 }
1838
1839
1840 /*
1841 * exit func, stops hardware and unregisters netdevice
1842 */
1843 static int __devexit bcm_enet_remove(struct platform_device *pdev)
1844 {
1845 struct bcm_enet_priv *priv;
1846 struct net_device *dev;
1847 struct resource *res;
1848
1849 /* stop netdevice */
1850 dev = platform_get_drvdata(pdev);
1851 priv = netdev_priv(dev);
1852 unregister_netdev(dev);
1853
1854 /* turn off mdc clock */
1855 enet_writel(priv, 0, ENET_MIISC_REG);
1856
1857 if (priv->has_phy) {
1858 mdiobus_unregister(priv->mii_bus);
1859 kfree(priv->mii_bus->irq);
1860 mdiobus_free(priv->mii_bus);
1861 } else {
1862 struct bcm63xx_enet_platform_data *pd;
1863
1864 pd = pdev->dev.platform_data;
1865 if (pd && pd->mii_config)
1866 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1867 bcm_enet_mdio_write_mii);
1868 }
1869
1870 /* release device resources */
1871 iounmap(priv->base);
1872 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1873 release_mem_region(res->start, res->end - res->start + 1);
1874
1875 /* disable hw block clocks */
1876 if (priv->phy_clk) {
1877 clk_disable(priv->phy_clk);
1878 clk_put(priv->phy_clk);
1879 }
1880 clk_disable(priv->mac_clk);
1881 clk_put(priv->mac_clk);
1882
1883 platform_set_drvdata(pdev, NULL);
1884 free_netdev(dev);
1885 return 0;
1886 }
1887
1888 struct platform_driver bcm63xx_enet_driver = {
1889 .probe = bcm_enet_probe,
1890 .remove = __devexit_p(bcm_enet_remove),
1891 .driver = {
1892 .name = "bcm63xx_enet",
1893 .owner = THIS_MODULE,
1894 },
1895 };
1896
1897 /*
1898 * reserve & remap memory space shared between all macs
1899 */
1900 static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
1901 {
1902 struct resource *res;
1903 unsigned int iomem_size;
1904
1905 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1906 if (!res)
1907 return -ENODEV;
1908
1909 iomem_size = res->end - res->start + 1;
1910 if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
1911 return -EBUSY;
1912
1913 bcm_enet_shared_base = ioremap(res->start, iomem_size);
1914 if (!bcm_enet_shared_base) {
1915 release_mem_region(res->start, iomem_size);
1916 return -ENOMEM;
1917 }
1918 return 0;
1919 }
1920
1921 static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
1922 {
1923 struct resource *res;
1924
1925 iounmap(bcm_enet_shared_base);
1926 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1927 release_mem_region(res->start, res->end - res->start + 1);
1928 return 0;
1929 }
1930
1931 /*
1932 * this "shared" driver is needed because both macs share a single
1933 * address space
1934 */
1935 struct platform_driver bcm63xx_enet_shared_driver = {
1936 .probe = bcm_enet_shared_probe,
1937 .remove = __devexit_p(bcm_enet_shared_remove),
1938 .driver = {
1939 .name = "bcm63xx_enet_shared",
1940 .owner = THIS_MODULE,
1941 },
1942 };
1943
1944 /*
1945 * entry point
1946 */
1947 static int __init bcm_enet_init(void)
1948 {
1949 int ret;
1950
1951 ret = platform_driver_register(&bcm63xx_enet_shared_driver);
1952 if (ret)
1953 return ret;
1954
1955 ret = platform_driver_register(&bcm63xx_enet_driver);
1956 if (ret)
1957 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1958
1959 return ret;
1960 }
1961
1962 static void __exit bcm_enet_exit(void)
1963 {
1964 platform_driver_unregister(&bcm63xx_enet_driver);
1965 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1966 }
1967
1968
1969 module_init(bcm_enet_init);
1970 module_exit(bcm_enet_exit);
1971
1972 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
1973 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
1974 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree