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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / broadcom / bcm63xx_enet.c
blobc7ca7ec065eeea7dfe164f96384ec3aaf464809d
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/interrupt.h>
22 #include <linux/module.h>
23 #include <linux/clk.h>
24 #include <linux/etherdevice.h>
25 #include <linux/slab.h>
26 #include <linux/delay.h>
27 #include <linux/ethtool.h>
28 #include <linux/crc32.h>
29 #include <linux/err.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/platform_device.h>
32 #include <linux/if_vlan.h>
33
34 #include <bcm63xx_dev_enet.h>
35 #include "bcm63xx_enet.h"
36
37 static char bcm_enet_driver_name[] = "bcm63xx_enet";
38 static char bcm_enet_driver_version[] = "1.0";
39
40 static int copybreak __read_mostly = 128;
41 module_param(copybreak, int, 0);
42 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
43
44 /* io memory shared between all devices */
45 static void __iomem *bcm_enet_shared_base;
46
47 /*
48 * io helpers to access mac registers
49 */
50 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
51 {
52 return bcm_readl(priv->base + off);
53 }
54
55 static inline void enet_writel(struct bcm_enet_priv *priv,
56 u32 val, u32 off)
57 {
58 bcm_writel(val, priv->base + off);
59 }
60
61 /*
62 * io helpers to access shared registers
63 */
64 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
65 {
66 return bcm_readl(bcm_enet_shared_base + off);
67 }
68
69 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
70 u32 val, u32 off)
71 {
72 bcm_writel(val, bcm_enet_shared_base + off);
73 }
74
75 /*
76 * write given data into mii register and wait for transfer to end
77 * with timeout (average measured transfer time is 25us)
78 */
79 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
80 {
81 int limit;
82
83 /* make sure mii interrupt status is cleared */
84 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
85
86 enet_writel(priv, data, ENET_MIIDATA_REG);
87 wmb();
88
89 /* busy wait on mii interrupt bit, with timeout */
90 limit = 1000;
91 do {
92 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
93 break;
94 udelay(1);
95 } while (limit-- > 0);
96
97 return (limit < 0) ? 1 : 0;
98 }
99
100 /*
101 * MII internal read callback
102 */
103 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
104 int regnum)
105 {
106 u32 tmp, val;
107
108 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
109 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
110 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
111 tmp |= ENET_MIIDATA_OP_READ_MASK;
112
113 if (do_mdio_op(priv, tmp))
114 return -1;
115
116 val = enet_readl(priv, ENET_MIIDATA_REG);
117 val &= 0xffff;
118 return val;
119 }
120
121 /*
122 * MII internal write callback
123 */
124 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
125 int regnum, u16 value)
126 {
127 u32 tmp;
128
129 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
130 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
131 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
132 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
133 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
134
135 (void)do_mdio_op(priv, tmp);
136 return 0;
137 }
138
139 /*
140 * MII read callback from phylib
141 */
142 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
143 int regnum)
144 {
145 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
146 }
147
148 /*
149 * MII write callback from phylib
150 */
151 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
152 int regnum, u16 value)
153 {
154 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
155 }
156
157 /*
158 * MII read callback from mii core
159 */
160 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
161 int regnum)
162 {
163 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
164 }
165
166 /*
167 * MII write callback from mii core
168 */
169 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
170 int regnum, int value)
171 {
172 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
173 }
174
175 /*
176 * refill rx queue
177 */
178 static int bcm_enet_refill_rx(struct net_device *dev)
179 {
180 struct bcm_enet_priv *priv;
181
182 priv = netdev_priv(dev);
183
184 while (priv->rx_desc_count < priv->rx_ring_size) {
185 struct bcm_enet_desc *desc;
186 struct sk_buff *skb;
187 dma_addr_t p;
188 int desc_idx;
189 u32 len_stat;
190
191 desc_idx = priv->rx_dirty_desc;
192 desc = &priv->rx_desc_cpu[desc_idx];
193
194 if (!priv->rx_skb[desc_idx]) {
195 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
196 if (!skb)
197 break;
198 priv->rx_skb[desc_idx] = skb;
199
200 p = dma_map_single(&priv->pdev->dev, skb->data,
201 priv->rx_skb_size,
202 DMA_FROM_DEVICE);
203 desc->address = p;
204 }
205
206 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
207 len_stat |= DMADESC_OWNER_MASK;
208 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
209 len_stat |= DMADESC_WRAP_MASK;
210 priv->rx_dirty_desc = 0;
211 } else {
212 priv->rx_dirty_desc++;
213 }
214 wmb();
215 desc->len_stat = len_stat;
216
217 priv->rx_desc_count++;
218
219 /* tell dma engine we allocated one buffer */
220 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
221 }
222
223 /* If rx ring is still empty, set a timer to try allocating
224 * again at a later time. */
225 if (priv->rx_desc_count == 0 && netif_running(dev)) {
226 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
227 priv->rx_timeout.expires = jiffies + HZ;
228 add_timer(&priv->rx_timeout);
229 }
230
231 return 0;
232 }
233
234 /*
235 * timer callback to defer refill rx queue in case we're OOM
236 */
237 static void bcm_enet_refill_rx_timer(unsigned long data)
238 {
239 struct net_device *dev;
240 struct bcm_enet_priv *priv;
241
242 dev = (struct net_device *)data;
243 priv = netdev_priv(dev);
244
245 spin_lock(&priv->rx_lock);
246 bcm_enet_refill_rx((struct net_device *)data);
247 spin_unlock(&priv->rx_lock);
248 }
249
250 /*
251 * extract packet from rx queue
252 */
253 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
254 {
255 struct bcm_enet_priv *priv;
256 struct device *kdev;
257 int processed;
258
259 priv = netdev_priv(dev);
260 kdev = &priv->pdev->dev;
261 processed = 0;
262
263 /* don't scan ring further than number of refilled
264 * descriptor */
265 if (budget > priv->rx_desc_count)
266 budget = priv->rx_desc_count;
267
268 do {
269 struct bcm_enet_desc *desc;
270 struct sk_buff *skb;
271 int desc_idx;
272 u32 len_stat;
273 unsigned int len;
274
275 desc_idx = priv->rx_curr_desc;
276 desc = &priv->rx_desc_cpu[desc_idx];
277
278 /* make sure we actually read the descriptor status at
279 * each loop */
280 rmb();
281
282 len_stat = desc->len_stat;
283
284 /* break if dma ownership belongs to hw */
285 if (len_stat & DMADESC_OWNER_MASK)
286 break;
287
288 processed++;
289 priv->rx_curr_desc++;
290 if (priv->rx_curr_desc == priv->rx_ring_size)
291 priv->rx_curr_desc = 0;
292 priv->rx_desc_count--;
293
294 /* if the packet does not have start of packet _and_
295 * end of packet flag set, then just recycle it */
296 if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
297 dev->stats.rx_dropped++;
298 continue;
299 }
300
301 /* recycle packet if it's marked as bad */
302 if (unlikely(len_stat & DMADESC_ERR_MASK)) {
303 dev->stats.rx_errors++;
304
305 if (len_stat & DMADESC_OVSIZE_MASK)
306 dev->stats.rx_length_errors++;
307 if (len_stat & DMADESC_CRC_MASK)
308 dev->stats.rx_crc_errors++;
309 if (len_stat & DMADESC_UNDER_MASK)
310 dev->stats.rx_frame_errors++;
311 if (len_stat & DMADESC_OV_MASK)
312 dev->stats.rx_fifo_errors++;
313 continue;
314 }
315
316 /* valid packet */
317 skb = priv->rx_skb[desc_idx];
318 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
319 /* don't include FCS */
320 len -= 4;
321
322 if (len < copybreak) {
323 struct sk_buff *nskb;
324
325 nskb = netdev_alloc_skb_ip_align(dev, len);
326 if (!nskb) {
327 /* forget packet, just rearm desc */
328 dev->stats.rx_dropped++;
329 continue;
330 }
331
332 dma_sync_single_for_cpu(kdev, desc->address,
333 len, DMA_FROM_DEVICE);
334 memcpy(nskb->data, skb->data, len);
335 dma_sync_single_for_device(kdev, desc->address,
336 len, DMA_FROM_DEVICE);
337 skb = nskb;
338 } else {
339 dma_unmap_single(&priv->pdev->dev, desc->address,
340 priv->rx_skb_size, DMA_FROM_DEVICE);
341 priv->rx_skb[desc_idx] = NULL;
342 }
343
344 skb_put(skb, len);
345 skb->protocol = eth_type_trans(skb, dev);
346 dev->stats.rx_packets++;
347 dev->stats.rx_bytes += len;
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 dev->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 dev->stats.tx_bytes += skb->len;
568 dev->stats.tx_packets++;
569 ret = NETDEV_TX_OK;
570
571 out_unlock:
572 spin_unlock(&priv->tx_lock);
573 return ret;
574 }
575
576 /*
577 * Change the interface's mac address.
578 */
579 static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
580 {
581 struct bcm_enet_priv *priv;
582 struct sockaddr *addr = p;
583 u32 val;
584
585 priv = netdev_priv(dev);
586 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
587
588 /* use perfect match register 0 to store my mac address */
589 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
590 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
591 enet_writel(priv, val, ENET_PML_REG(0));
592
593 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
594 val |= ENET_PMH_DATAVALID_MASK;
595 enet_writel(priv, val, ENET_PMH_REG(0));
596
597 return 0;
598 }
599
600 /*
601 * Change rx mode (promiscuous/allmulti) and update multicast list
602 */
603 static void bcm_enet_set_multicast_list(struct net_device *dev)
604 {
605 struct bcm_enet_priv *priv;
606 struct netdev_hw_addr *ha;
607 u32 val;
608 int i;
609
610 priv = netdev_priv(dev);
611
612 val = enet_readl(priv, ENET_RXCFG_REG);
613
614 if (dev->flags & IFF_PROMISC)
615 val |= ENET_RXCFG_PROMISC_MASK;
616 else
617 val &= ~ENET_RXCFG_PROMISC_MASK;
618
619 /* only 3 perfect match registers left, first one is used for
620 * own mac address */
621 if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
622 val |= ENET_RXCFG_ALLMCAST_MASK;
623 else
624 val &= ~ENET_RXCFG_ALLMCAST_MASK;
625
626 /* no need to set perfect match registers if we catch all
627 * multicast */
628 if (val & ENET_RXCFG_ALLMCAST_MASK) {
629 enet_writel(priv, val, ENET_RXCFG_REG);
630 return;
631 }
632
633 i = 0;
634 netdev_for_each_mc_addr(ha, dev) {
635 u8 *dmi_addr;
636 u32 tmp;
637
638 if (i == 3)
639 break;
640 /* update perfect match registers */
641 dmi_addr = ha->addr;
642 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
643 (dmi_addr[4] << 8) | dmi_addr[5];
644 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
645
646 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
647 tmp |= ENET_PMH_DATAVALID_MASK;
648 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
649 }
650
651 for (; i < 3; i++) {
652 enet_writel(priv, 0, ENET_PML_REG(i + 1));
653 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
654 }
655
656 enet_writel(priv, val, ENET_RXCFG_REG);
657 }
658
659 /*
660 * set mac duplex parameters
661 */
662 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
663 {
664 u32 val;
665
666 val = enet_readl(priv, ENET_TXCTL_REG);
667 if (fullduplex)
668 val |= ENET_TXCTL_FD_MASK;
669 else
670 val &= ~ENET_TXCTL_FD_MASK;
671 enet_writel(priv, val, ENET_TXCTL_REG);
672 }
673
674 /*
675 * set mac flow control parameters
676 */
677 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
678 {
679 u32 val;
680
681 /* rx flow control (pause frame handling) */
682 val = enet_readl(priv, ENET_RXCFG_REG);
683 if (rx_en)
684 val |= ENET_RXCFG_ENFLOW_MASK;
685 else
686 val &= ~ENET_RXCFG_ENFLOW_MASK;
687 enet_writel(priv, val, ENET_RXCFG_REG);
688
689 /* tx flow control (pause frame generation) */
690 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
691 if (tx_en)
692 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
693 else
694 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
695 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
696 }
697
698 /*
699 * link changed callback (from phylib)
700 */
701 static void bcm_enet_adjust_phy_link(struct net_device *dev)
702 {
703 struct bcm_enet_priv *priv;
704 struct phy_device *phydev;
705 int status_changed;
706
707 priv = netdev_priv(dev);
708 phydev = priv->phydev;
709 status_changed = 0;
710
711 if (priv->old_link != phydev->link) {
712 status_changed = 1;
713 priv->old_link = phydev->link;
714 }
715
716 /* reflect duplex change in mac configuration */
717 if (phydev->link && phydev->duplex != priv->old_duplex) {
718 bcm_enet_set_duplex(priv,
719 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
720 status_changed = 1;
721 priv->old_duplex = phydev->duplex;
722 }
723
724 /* enable flow control if remote advertise it (trust phylib to
725 * check that duplex is full */
726 if (phydev->link && phydev->pause != priv->old_pause) {
727 int rx_pause_en, tx_pause_en;
728
729 if (phydev->pause) {
730 /* pause was advertised by lpa and us */
731 rx_pause_en = 1;
732 tx_pause_en = 1;
733 } else if (!priv->pause_auto) {
734 /* pause setting overrided by user */
735 rx_pause_en = priv->pause_rx;
736 tx_pause_en = priv->pause_tx;
737 } else {
738 rx_pause_en = 0;
739 tx_pause_en = 0;
740 }
741
742 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
743 status_changed = 1;
744 priv->old_pause = phydev->pause;
745 }
746
747 if (status_changed) {
748 pr_info("%s: link %s", dev->name, phydev->link ?
749 "UP" : "DOWN");
750 if (phydev->link)
751 pr_cont(" - %d/%s - flow control %s", phydev->speed,
752 DUPLEX_FULL == phydev->duplex ? "full" : "half",
753 phydev->pause == 1 ? "rx&tx" : "off");
754
755 pr_cont("\n");
756 }
757 }
758
759 /*
760 * link changed callback (if phylib is not used)
761 */
762 static void bcm_enet_adjust_link(struct net_device *dev)
763 {
764 struct bcm_enet_priv *priv;
765
766 priv = netdev_priv(dev);
767 bcm_enet_set_duplex(priv, priv->force_duplex_full);
768 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
769 netif_carrier_on(dev);
770
771 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
772 dev->name,
773 priv->force_speed_100 ? 100 : 10,
774 priv->force_duplex_full ? "full" : "half",
775 priv->pause_rx ? "rx" : "off",
776 priv->pause_tx ? "tx" : "off");
777 }
778
779 /*
780 * open callback, allocate dma rings & buffers and start rx operation
781 */
782 static int bcm_enet_open(struct net_device *dev)
783 {
784 struct bcm_enet_priv *priv;
785 struct sockaddr addr;
786 struct device *kdev;
787 struct phy_device *phydev;
788 int i, ret;
789 unsigned int size;
790 char phy_id[MII_BUS_ID_SIZE + 3];
791 void *p;
792 u32 val;
793
794 priv = netdev_priv(dev);
795 kdev = &priv->pdev->dev;
796
797 if (priv->has_phy) {
798 /* connect to PHY */
799 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
800 priv->mii_bus->id, priv->phy_id);
801
802 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link, 0,
803 PHY_INTERFACE_MODE_MII);
804
805 if (IS_ERR(phydev)) {
806 dev_err(kdev, "could not attach to PHY\n");
807 return PTR_ERR(phydev);
808 }
809
810 /* mask with MAC supported features */
811 phydev->supported &= (SUPPORTED_10baseT_Half |
812 SUPPORTED_10baseT_Full |
813 SUPPORTED_100baseT_Half |
814 SUPPORTED_100baseT_Full |
815 SUPPORTED_Autoneg |
816 SUPPORTED_Pause |
817 SUPPORTED_MII);
818 phydev->advertising = phydev->supported;
819
820 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
821 phydev->advertising |= SUPPORTED_Pause;
822 else
823 phydev->advertising &= ~SUPPORTED_Pause;
824
825 dev_info(kdev, "attached PHY at address %d [%s]\n",
826 phydev->addr, phydev->drv->name);
827
828 priv->old_link = 0;
829 priv->old_duplex = -1;
830 priv->old_pause = -1;
831 priv->phydev = phydev;
832 }
833
834 /* mask all interrupts and request them */
835 enet_writel(priv, 0, ENET_IRMASK_REG);
836 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
837 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
838
839 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
840 if (ret)
841 goto out_phy_disconnect;
842
843 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, IRQF_DISABLED,
844 dev->name, dev);
845 if (ret)
846 goto out_freeirq;
847
848 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
849 IRQF_DISABLED, dev->name, dev);
850 if (ret)
851 goto out_freeirq_rx;
852
853 /* initialize perfect match registers */
854 for (i = 0; i < 4; i++) {
855 enet_writel(priv, 0, ENET_PML_REG(i));
856 enet_writel(priv, 0, ENET_PMH_REG(i));
857 }
858
859 /* write device mac address */
860 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
861 bcm_enet_set_mac_address(dev, &addr);
862
863 /* allocate rx dma ring */
864 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
865 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
866 if (!p) {
867 dev_err(kdev, "cannot allocate rx ring %u\n", size);
868 ret = -ENOMEM;
869 goto out_freeirq_tx;
870 }
871
872 memset(p, 0, size);
873 priv->rx_desc_alloc_size = size;
874 priv->rx_desc_cpu = p;
875
876 /* allocate tx dma ring */
877 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
878 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
879 if (!p) {
880 dev_err(kdev, "cannot allocate tx ring\n");
881 ret = -ENOMEM;
882 goto out_free_rx_ring;
883 }
884
885 memset(p, 0, size);
886 priv->tx_desc_alloc_size = size;
887 priv->tx_desc_cpu = p;
888
889 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
890 GFP_KERNEL);
891 if (!priv->tx_skb) {
892 dev_err(kdev, "cannot allocate rx skb queue\n");
893 ret = -ENOMEM;
894 goto out_free_tx_ring;
895 }
896
897 priv->tx_desc_count = priv->tx_ring_size;
898 priv->tx_dirty_desc = 0;
899 priv->tx_curr_desc = 0;
900 spin_lock_init(&priv->tx_lock);
901
902 /* init & fill rx ring with skbs */
903 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
904 GFP_KERNEL);
905 if (!priv->rx_skb) {
906 dev_err(kdev, "cannot allocate rx skb queue\n");
907 ret = -ENOMEM;
908 goto out_free_tx_skb;
909 }
910
911 priv->rx_desc_count = 0;
912 priv->rx_dirty_desc = 0;
913 priv->rx_curr_desc = 0;
914
915 /* initialize flow control buffer allocation */
916 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
917 ENETDMA_BUFALLOC_REG(priv->rx_chan));
918
919 if (bcm_enet_refill_rx(dev)) {
920 dev_err(kdev, "cannot allocate rx skb queue\n");
921 ret = -ENOMEM;
922 goto out;
923 }
924
925 /* write rx & tx ring addresses */
926 enet_dma_writel(priv, priv->rx_desc_dma,
927 ENETDMA_RSTART_REG(priv->rx_chan));
928 enet_dma_writel(priv, priv->tx_desc_dma,
929 ENETDMA_RSTART_REG(priv->tx_chan));
930
931 /* clear remaining state ram for rx & tx channel */
932 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
933 enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
934 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
935 enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
936 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
937 enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
938
939 /* set max rx/tx length */
940 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
941 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
942
943 /* set dma maximum burst len */
944 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
945 ENETDMA_MAXBURST_REG(priv->rx_chan));
946 enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
947 ENETDMA_MAXBURST_REG(priv->tx_chan));
948
949 /* set correct transmit fifo watermark */
950 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
951
952 /* set flow control low/high threshold to 1/3 / 2/3 */
953 val = priv->rx_ring_size / 3;
954 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
955 val = (priv->rx_ring_size * 2) / 3;
956 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
957
958 /* all set, enable mac and interrupts, start dma engine and
959 * kick rx dma channel */
960 wmb();
961 val = enet_readl(priv, ENET_CTL_REG);
962 val |= ENET_CTL_ENABLE_MASK;
963 enet_writel(priv, val, ENET_CTL_REG);
964 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
965 enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
966 ENETDMA_CHANCFG_REG(priv->rx_chan));
967
968 /* watch "mib counters about to overflow" interrupt */
969 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
970 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
971
972 /* watch "packet transferred" interrupt in rx and tx */
973 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
974 ENETDMA_IR_REG(priv->rx_chan));
975 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
976 ENETDMA_IR_REG(priv->tx_chan));
977
978 /* make sure we enable napi before rx interrupt */
979 napi_enable(&priv->napi);
980
981 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
982 ENETDMA_IRMASK_REG(priv->rx_chan));
983 enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
984 ENETDMA_IRMASK_REG(priv->tx_chan));
985
986 if (priv->has_phy)
987 phy_start(priv->phydev);
988 else
989 bcm_enet_adjust_link(dev);
990
991 netif_start_queue(dev);
992 return 0;
993
994 out:
995 for (i = 0; i < priv->rx_ring_size; i++) {
996 struct bcm_enet_desc *desc;
997
998 if (!priv->rx_skb[i])
999 continue;
1000
1001 desc = &priv->rx_desc_cpu[i];
1002 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1003 DMA_FROM_DEVICE);
1004 kfree_skb(priv->rx_skb[i]);
1005 }
1006 kfree(priv->rx_skb);
1007
1008 out_free_tx_skb:
1009 kfree(priv->tx_skb);
1010
1011 out_free_tx_ring:
1012 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1013 priv->tx_desc_cpu, priv->tx_desc_dma);
1014
1015 out_free_rx_ring:
1016 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1017 priv->rx_desc_cpu, priv->rx_desc_dma);
1018
1019 out_freeirq_tx:
1020 free_irq(priv->irq_tx, dev);
1021
1022 out_freeirq_rx:
1023 free_irq(priv->irq_rx, dev);
1024
1025 out_freeirq:
1026 free_irq(dev->irq, dev);
1027
1028 out_phy_disconnect:
1029 phy_disconnect(priv->phydev);
1030
1031 return ret;
1032 }
1033
1034 /*
1035 * disable mac
1036 */
1037 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1038 {
1039 int limit;
1040 u32 val;
1041
1042 val = enet_readl(priv, ENET_CTL_REG);
1043 val |= ENET_CTL_DISABLE_MASK;
1044 enet_writel(priv, val, ENET_CTL_REG);
1045
1046 limit = 1000;
1047 do {
1048 u32 val;
1049
1050 val = enet_readl(priv, ENET_CTL_REG);
1051 if (!(val & ENET_CTL_DISABLE_MASK))
1052 break;
1053 udelay(1);
1054 } while (limit--);
1055 }
1056
1057 /*
1058 * disable dma in given channel
1059 */
1060 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1061 {
1062 int limit;
1063
1064 enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
1065
1066 limit = 1000;
1067 do {
1068 u32 val;
1069
1070 val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
1071 if (!(val & ENETDMA_CHANCFG_EN_MASK))
1072 break;
1073 udelay(1);
1074 } while (limit--);
1075 }
1076
1077 /*
1078 * stop callback
1079 */
1080 static int bcm_enet_stop(struct net_device *dev)
1081 {
1082 struct bcm_enet_priv *priv;
1083 struct device *kdev;
1084 int i;
1085
1086 priv = netdev_priv(dev);
1087 kdev = &priv->pdev->dev;
1088
1089 netif_stop_queue(dev);
1090 napi_disable(&priv->napi);
1091 if (priv->has_phy)
1092 phy_stop(priv->phydev);
1093 del_timer_sync(&priv->rx_timeout);
1094
1095 /* mask all interrupts */
1096 enet_writel(priv, 0, ENET_IRMASK_REG);
1097 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
1098 enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
1099
1100 /* make sure no mib update is scheduled */
1101 cancel_work_sync(&priv->mib_update_task);
1102
1103 /* disable dma & mac */
1104 bcm_enet_disable_dma(priv, priv->tx_chan);
1105 bcm_enet_disable_dma(priv, priv->rx_chan);
1106 bcm_enet_disable_mac(priv);
1107
1108 /* force reclaim of all tx buffers */
1109 bcm_enet_tx_reclaim(dev, 1);
1110
1111 /* free the rx skb ring */
1112 for (i = 0; i < priv->rx_ring_size; i++) {
1113 struct bcm_enet_desc *desc;
1114
1115 if (!priv->rx_skb[i])
1116 continue;
1117
1118 desc = &priv->rx_desc_cpu[i];
1119 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1120 DMA_FROM_DEVICE);
1121 kfree_skb(priv->rx_skb[i]);
1122 }
1123
1124 /* free remaining allocated memory */
1125 kfree(priv->rx_skb);
1126 kfree(priv->tx_skb);
1127 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1128 priv->rx_desc_cpu, priv->rx_desc_dma);
1129 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1130 priv->tx_desc_cpu, priv->tx_desc_dma);
1131 free_irq(priv->irq_tx, dev);
1132 free_irq(priv->irq_rx, dev);
1133 free_irq(dev->irq, dev);
1134
1135 /* release phy */
1136 if (priv->has_phy) {
1137 phy_disconnect(priv->phydev);
1138 priv->phydev = NULL;
1139 }
1140
1141 return 0;
1142 }
1143
1144 /*
1145 * ethtool callbacks
1146 */
1147 struct bcm_enet_stats {
1148 char stat_string[ETH_GSTRING_LEN];
1149 int sizeof_stat;
1150 int stat_offset;
1151 int mib_reg;
1152 };
1153
1154 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1155 offsetof(struct bcm_enet_priv, m)
1156 #define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1157 offsetof(struct net_device_stats, m)
1158
1159 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1160 { "rx_packets", DEV_STAT(rx_packets), -1 },
1161 { "tx_packets", DEV_STAT(tx_packets), -1 },
1162 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1163 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1164 { "rx_errors", DEV_STAT(rx_errors), -1 },
1165 { "tx_errors", DEV_STAT(tx_errors), -1 },
1166 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1167 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1168
1169 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1170 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1171 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1172 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1173 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1174 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1175 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1176 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1177 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1178 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1179 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1180 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1181 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1182 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1183 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1184 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1185 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1186 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1187 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1188 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1189 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1190
1191 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1192 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1193 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1194 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1195 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1196 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1197 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1198 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1199 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1200 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1201 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1202 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1203 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1204 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1205 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1206 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1207 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1208 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1209 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1210 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1211 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1212 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1213
1214 };
1215
1216 #define BCM_ENET_STATS_LEN \
1217 (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
1218
1219 static const u32 unused_mib_regs[] = {
1220 ETH_MIB_TX_ALL_OCTETS,
1221 ETH_MIB_TX_ALL_PKTS,
1222 ETH_MIB_RX_ALL_OCTETS,
1223 ETH_MIB_RX_ALL_PKTS,
1224 };
1225
1226
1227 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1228 struct ethtool_drvinfo *drvinfo)
1229 {
1230 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
1231 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
1232 strncpy(drvinfo->fw_version, "N/A", 32);
1233 strncpy(drvinfo->bus_info, "bcm63xx", 32);
1234 drvinfo->n_stats = BCM_ENET_STATS_LEN;
1235 }
1236
1237 static int bcm_enet_get_sset_count(struct net_device *netdev,
1238 int string_set)
1239 {
1240 switch (string_set) {
1241 case ETH_SS_STATS:
1242 return BCM_ENET_STATS_LEN;
1243 default:
1244 return -EINVAL;
1245 }
1246 }
1247
1248 static void bcm_enet_get_strings(struct net_device *netdev,
1249 u32 stringset, u8 *data)
1250 {
1251 int i;
1252
1253 switch (stringset) {
1254 case ETH_SS_STATS:
1255 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1256 memcpy(data + i * ETH_GSTRING_LEN,
1257 bcm_enet_gstrings_stats[i].stat_string,
1258 ETH_GSTRING_LEN);
1259 }
1260 break;
1261 }
1262 }
1263
1264 static void update_mib_counters(struct bcm_enet_priv *priv)
1265 {
1266 int i;
1267
1268 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1269 const struct bcm_enet_stats *s;
1270 u32 val;
1271 char *p;
1272
1273 s = &bcm_enet_gstrings_stats[i];
1274 if (s->mib_reg == -1)
1275 continue;
1276
1277 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1278 p = (char *)priv + s->stat_offset;
1279
1280 if (s->sizeof_stat == sizeof(u64))
1281 *(u64 *)p += val;
1282 else
1283 *(u32 *)p += val;
1284 }
1285
1286 /* also empty unused mib counters to make sure mib counter
1287 * overflow interrupt is cleared */
1288 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1289 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1290 }
1291
1292 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1293 {
1294 struct bcm_enet_priv *priv;
1295
1296 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1297 mutex_lock(&priv->mib_update_lock);
1298 update_mib_counters(priv);
1299 mutex_unlock(&priv->mib_update_lock);
1300
1301 /* reenable mib interrupt */
1302 if (netif_running(priv->net_dev))
1303 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1304 }
1305
1306 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1307 struct ethtool_stats *stats,
1308 u64 *data)
1309 {
1310 struct bcm_enet_priv *priv;
1311 int i;
1312
1313 priv = netdev_priv(netdev);
1314
1315 mutex_lock(&priv->mib_update_lock);
1316 update_mib_counters(priv);
1317
1318 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1319 const struct bcm_enet_stats *s;
1320 char *p;
1321
1322 s = &bcm_enet_gstrings_stats[i];
1323 if (s->mib_reg == -1)
1324 p = (char *)&netdev->stats;
1325 else
1326 p = (char *)priv;
1327 p += s->stat_offset;
1328 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1329 *(u64 *)p : *(u32 *)p;
1330 }
1331 mutex_unlock(&priv->mib_update_lock);
1332 }
1333
1334 static int bcm_enet_get_settings(struct net_device *dev,
1335 struct ethtool_cmd *cmd)
1336 {
1337 struct bcm_enet_priv *priv;
1338
1339 priv = netdev_priv(dev);
1340
1341 cmd->maxrxpkt = 0;
1342 cmd->maxtxpkt = 0;
1343
1344 if (priv->has_phy) {
1345 if (!priv->phydev)
1346 return -ENODEV;
1347 return phy_ethtool_gset(priv->phydev, cmd);
1348 } else {
1349 cmd->autoneg = 0;
1350 ethtool_cmd_speed_set(cmd, ((priv->force_speed_100)
1351 ? SPEED_100 : SPEED_10));
1352 cmd->duplex = (priv->force_duplex_full) ?
1353 DUPLEX_FULL : DUPLEX_HALF;
1354 cmd->supported = ADVERTISED_10baseT_Half |
1355 ADVERTISED_10baseT_Full |
1356 ADVERTISED_100baseT_Half |
1357 ADVERTISED_100baseT_Full;
1358 cmd->advertising = 0;
1359 cmd->port = PORT_MII;
1360 cmd->transceiver = XCVR_EXTERNAL;
1361 }
1362 return 0;
1363 }
1364
1365 static int bcm_enet_set_settings(struct net_device *dev,
1366 struct ethtool_cmd *cmd)
1367 {
1368 struct bcm_enet_priv *priv;
1369
1370 priv = netdev_priv(dev);
1371 if (priv->has_phy) {
1372 if (!priv->phydev)
1373 return -ENODEV;
1374 return phy_ethtool_sset(priv->phydev, cmd);
1375 } else {
1376
1377 if (cmd->autoneg ||
1378 (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1379 cmd->port != PORT_MII)
1380 return -EINVAL;
1381
1382 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1383 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1384
1385 if (netif_running(dev))
1386 bcm_enet_adjust_link(dev);
1387 return 0;
1388 }
1389 }
1390
1391 static void bcm_enet_get_ringparam(struct net_device *dev,
1392 struct ethtool_ringparam *ering)
1393 {
1394 struct bcm_enet_priv *priv;
1395
1396 priv = netdev_priv(dev);
1397
1398 /* rx/tx ring is actually only limited by memory */
1399 ering->rx_max_pending = 8192;
1400 ering->tx_max_pending = 8192;
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 const 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_rx_mode = 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 = resource_size(res_mem);
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, "%s-%d", pdev->name, 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, resource_size(res));
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 = resource_size(res);
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, resource_size(res));
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");