Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6.git] / drivers / net / bcm63xx_enet.c
1 /*
2  * Driver for BCM963xx builtin Ethernet mac
3  *
4  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  */
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/clk.h>
23 #include <linux/etherdevice.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <linux/ethtool.h>
27 #include <linux/crc32.h>
28 #include <linux/err.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/platform_device.h>
31 #include <linux/if_vlan.h>
32
33 #include <bcm63xx_dev_enet.h>
34 #include "bcm63xx_enet.h"
35
36 static char bcm_enet_driver_name[] = "bcm63xx_enet";
37 static char bcm_enet_driver_version[] = "1.0";
38
39 static int copybreak __read_mostly = 128;
40 module_param(copybreak, int, 0);
41 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
42
43 /* io memory shared between all devices */
44 static void __iomem *bcm_enet_shared_base;
45
46 /*
47  * io helpers to access mac registers
48  */
49 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
50 {
51         return bcm_readl(priv->base + off);
52 }
53
54 static inline void enet_writel(struct bcm_enet_priv *priv,
55                                u32 val, u32 off)
56 {
57         bcm_writel(val, priv->base + off);
58 }
59
60 /*
61  * io helpers to access shared registers
62  */
63 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
64 {
65         return bcm_readl(bcm_enet_shared_base + off);
66 }
67
68 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
69                                        u32 val, u32 off)
70 {
71         bcm_writel(val, bcm_enet_shared_base + off);
72 }
73
74 /*
75  * write given data into mii register and wait for transfer to end
76  * with timeout (average measured transfer time is 25us)
77  */
78 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
79 {
80         int limit;
81
82         /* make sure mii interrupt status is cleared */
83         enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
84
85         enet_writel(priv, data, ENET_MIIDATA_REG);
86         wmb();
87
88         /* busy wait on mii interrupt bit, with timeout */
89         limit = 1000;
90         do {
91                 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
92                         break;
93                 udelay(1);
94         } while (limit-- > 0);
95
96         return (limit < 0) ? 1 : 0;
97 }
98
99 /*
100  * MII internal read callback
101  */
102 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
103                               int regnum)
104 {
105         u32 tmp, val;
106
107         tmp = regnum << ENET_MIIDATA_REG_SHIFT;
108         tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
109         tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
110         tmp |= ENET_MIIDATA_OP_READ_MASK;
111
112         if (do_mdio_op(priv, tmp))
113                 return -1;
114
115         val = enet_readl(priv, ENET_MIIDATA_REG);
116         val &= 0xffff;
117         return val;
118 }
119
120 /*
121  * MII internal write callback
122  */
123 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
124                                int regnum, u16 value)
125 {
126         u32 tmp;
127
128         tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
129         tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
130         tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
131         tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
132         tmp |= ENET_MIIDATA_OP_WRITE_MASK;
133
134         (void)do_mdio_op(priv, tmp);
135         return 0;
136 }
137
138 /*
139  * MII read callback from phylib
140  */
141 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
142                                      int regnum)
143 {
144         return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
145 }
146
147 /*
148  * MII write callback from phylib
149  */
150 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
151                                       int regnum, u16 value)
152 {
153         return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
154 }
155
156 /*
157  * MII read callback from mii core
158  */
159 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
160                                   int regnum)
161 {
162         return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
163 }
164
165 /*
166  * MII write callback from mii core
167  */
168 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
169                                     int regnum, int value)
170 {
171         bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
172 }
173
174 /*
175  * refill rx queue
176  */
177 static int bcm_enet_refill_rx(struct net_device *dev)
178 {
179         struct bcm_enet_priv *priv;
180
181         priv = netdev_priv(dev);
182
183         while (priv->rx_desc_count < priv->rx_ring_size) {
184                 struct bcm_enet_desc *desc;
185                 struct sk_buff *skb;
186                 dma_addr_t p;
187                 int desc_idx;
188                 u32 len_stat;
189
190                 desc_idx = priv->rx_dirty_desc;
191                 desc = &priv->rx_desc_cpu[desc_idx];
192
193                 if (!priv->rx_skb[desc_idx]) {
194                         skb = netdev_alloc_skb(dev, priv->rx_skb_size);
195                         if (!skb)
196                                 break;
197                         priv->rx_skb[desc_idx] = skb;
198
199                         p = dma_map_single(&priv->pdev->dev, skb->data,
200                                            priv->rx_skb_size,
201                                            DMA_FROM_DEVICE);
202                         desc->address = p;
203                 }
204
205                 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
206                 len_stat |= DMADESC_OWNER_MASK;
207                 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
208                         len_stat |= DMADESC_WRAP_MASK;
209                         priv->rx_dirty_desc = 0;
210                 } else {
211                         priv->rx_dirty_desc++;
212                 }
213                 wmb();
214                 desc->len_stat = len_stat;
215
216                 priv->rx_desc_count++;
217
218                 /* tell dma engine we allocated one buffer */
219                 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
220         }
221
222         /* If rx ring is still empty, set a timer to try allocating
223          * again at a later time. */
224         if (priv->rx_desc_count == 0 && netif_running(dev)) {
225                 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
226                 priv->rx_timeout.expires = jiffies + HZ;
227                 add_timer(&priv->rx_timeout);
228         }
229
230         return 0;
231 }
232
233 /*
234  * timer callback to defer refill rx queue in case we're OOM
235  */
236 static void bcm_enet_refill_rx_timer(unsigned long data)
237 {
238         struct net_device *dev;
239         struct bcm_enet_priv *priv;
240
241         dev = (struct net_device *)data;
242         priv = netdev_priv(dev);
243
244         spin_lock(&priv->rx_lock);
245         bcm_enet_refill_rx((struct net_device *)data);
246         spin_unlock(&priv->rx_lock);
247 }
248
249 /*
250  * extract packet from rx queue
251  */
252 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
253 {
254         struct bcm_enet_priv *priv;
255         struct device *kdev;
256         int processed;
257
258         priv = netdev_priv(dev);
259         kdev = &priv->pdev->dev;
260         processed = 0;
261
262         /* don't scan ring further than number of refilled
263          * descriptor */
264         if (budget > priv->rx_desc_count)
265                 budget = priv->rx_desc_count;
266
267         do {
268                 struct bcm_enet_desc *desc;
269                 struct sk_buff *skb;
270                 int desc_idx;
271                 u32 len_stat;
272                 unsigned int len;
273
274                 desc_idx = priv->rx_curr_desc;
275                 desc = &priv->rx_desc_cpu[desc_idx];
276
277                 /* make sure we actually read the descriptor status at
278                  * each loop */
279                 rmb();
280
281                 len_stat = desc->len_stat;
282
283                 /* break if dma ownership belongs to hw */
284                 if (len_stat & DMADESC_OWNER_MASK)
285                         break;
286
287                 processed++;
288                 priv->rx_curr_desc++;
289                 if (priv->rx_curr_desc == priv->rx_ring_size)
290                         priv->rx_curr_desc = 0;
291                 priv->rx_desc_count--;
292
293                 /* if the packet does not have start of packet _and_
294                  * end of packet flag set, then just recycle it */
295                 if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
296                         priv->stats.rx_dropped++;
297                         continue;
298                 }
299
300                 /* recycle packet if it's marked as bad */
301                 if (unlikely(len_stat & DMADESC_ERR_MASK)) {
302                         priv->stats.rx_errors++;
303
304                         if (len_stat & DMADESC_OVSIZE_MASK)
305                                 priv->stats.rx_length_errors++;
306                         if (len_stat & DMADESC_CRC_MASK)
307                                 priv->stats.rx_crc_errors++;
308                         if (len_stat & DMADESC_UNDER_MASK)
309                                 priv->stats.rx_frame_errors++;
310                         if (len_stat & DMADESC_OV_MASK)
311                                 priv->stats.rx_fifo_errors++;
312                         continue;
313                 }
314
315                 /* valid packet */
316                 skb = priv->rx_skb[desc_idx];
317                 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
318                 /* don't include FCS */
319                 len -= 4;
320
321                 if (len < copybreak) {
322                         struct sk_buff *nskb;
323
324                         nskb = netdev_alloc_skb_ip_align(dev, len);
325                         if (!nskb) {
326                                 /* forget packet, just rearm desc */
327                                 priv->stats.rx_dropped++;
328                                 continue;
329                         }
330
331                         dma_sync_single_for_cpu(kdev, desc->address,
332                                                 len, DMA_FROM_DEVICE);
333                         memcpy(nskb->data, skb->data, len);
334                         dma_sync_single_for_device(kdev, desc->address,
335                                                    len, DMA_FROM_DEVICE);
336                         skb = nskb;
337                 } else {
338                         dma_unmap_single(&priv->pdev->dev, desc->address,
339                                          priv->rx_skb_size, DMA_FROM_DEVICE);
340                         priv->rx_skb[desc_idx] = NULL;
341                 }
342
343                 skb_put(skb, len);
344                 skb->protocol = eth_type_trans(skb, dev);
345                 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 netdev_hw_addr *ha;
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) || netdev_mc_count(dev) > 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         i = 0;
635         netdev_for_each_mc_addr(ha, dev) {
636                 u8 *dmi_addr;
637                 u32 tmp;
638
639                 if (i == 3)
640                         break;
641                 /* update perfect match registers */
642                 dmi_addr = ha->addr;
643                 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
644                         (dmi_addr[4] << 8) | dmi_addr[5];
645                 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
646
647                 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
648                 tmp |= ENET_PMH_DATAVALID_MASK;
649                 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
650         }
651
652         for (; i < 3; i++) {
653                 enet_writel(priv, 0, ENET_PML_REG(i + 1));
654                 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
655         }
656
657         enet_writel(priv, val, ENET_RXCFG_REG);
658 }
659
660 /*
661  * set mac duplex parameters
662  */
663 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
664 {
665         u32 val;
666
667         val = enet_readl(priv, ENET_TXCTL_REG);
668         if (fullduplex)
669                 val |= ENET_TXCTL_FD_MASK;
670         else
671                 val &= ~ENET_TXCTL_FD_MASK;
672         enet_writel(priv, val, ENET_TXCTL_REG);
673 }
674
675 /*
676  * set mac flow control parameters
677  */
678 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
679 {
680         u32 val;
681
682         /* rx flow control (pause frame handling) */
683         val = enet_readl(priv, ENET_RXCFG_REG);
684         if (rx_en)
685                 val |= ENET_RXCFG_ENFLOW_MASK;
686         else
687                 val &= ~ENET_RXCFG_ENFLOW_MASK;
688         enet_writel(priv, val, ENET_RXCFG_REG);
689
690         /* tx flow control (pause frame generation) */
691         val = enet_dma_readl(priv, ENETDMA_CFG_REG);
692         if (tx_en)
693                 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
694         else
695                 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
696         enet_dma_writel(priv, val, ENETDMA_CFG_REG);
697 }
698
699 /*
700  * link changed callback (from phylib)
701  */
702 static void bcm_enet_adjust_phy_link(struct net_device *dev)
703 {
704         struct bcm_enet_priv *priv;
705         struct phy_device *phydev;
706         int status_changed;
707
708         priv = netdev_priv(dev);
709         phydev = priv->phydev;
710         status_changed = 0;
711
712         if (priv->old_link != phydev->link) {
713                 status_changed = 1;
714                 priv->old_link = phydev->link;
715         }
716
717         /* reflect duplex change in mac configuration */
718         if (phydev->link && phydev->duplex != priv->old_duplex) {
719                 bcm_enet_set_duplex(priv,
720                                     (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
721                 status_changed = 1;
722                 priv->old_duplex = phydev->duplex;
723         }
724
725         /* enable flow control if remote advertise it (trust phylib to
726          * check that duplex is full */
727         if (phydev->link && phydev->pause != priv->old_pause) {
728                 int rx_pause_en, tx_pause_en;
729
730                 if (phydev->pause) {
731                         /* pause was advertised by lpa and us */
732                         rx_pause_en = 1;
733                         tx_pause_en = 1;
734                 } else if (!priv->pause_auto) {
735                         /* pause setting overrided by user */
736                         rx_pause_en = priv->pause_rx;
737                         tx_pause_en = priv->pause_tx;
738                 } else {
739                         rx_pause_en = 0;
740                         tx_pause_en = 0;
741                 }
742
743                 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
744                 status_changed = 1;
745                 priv->old_pause = phydev->pause;
746         }
747
748         if (status_changed) {
749                 pr_info("%s: link %s", dev->name, phydev->link ?
750                         "UP" : "DOWN");
751                 if (phydev->link)
752                         pr_cont(" - %d/%s - flow control %s", phydev->speed,
753                                DUPLEX_FULL == phydev->duplex ? "full" : "half",
754                                phydev->pause == 1 ? "rx&tx" : "off");
755
756                 pr_cont("\n");
757         }
758 }
759
760 /*
761  * link changed callback (if phylib is not used)
762  */
763 static void bcm_enet_adjust_link(struct net_device *dev)
764 {
765         struct bcm_enet_priv *priv;
766
767         priv = netdev_priv(dev);
768         bcm_enet_set_duplex(priv, priv->force_duplex_full);
769         bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
770         netif_carrier_on(dev);
771
772         pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
773                 dev->name,
774                 priv->force_speed_100 ? 100 : 10,
775                 priv->force_duplex_full ? "full" : "half",
776                 priv->pause_rx ? "rx" : "off",
777                 priv->pause_tx ? "tx" : "off");
778 }
779
780 /*
781  * open callback, allocate dma rings & buffers and start rx operation
782  */
783 static int bcm_enet_open(struct net_device *dev)
784 {
785         struct bcm_enet_priv *priv;
786         struct sockaddr addr;
787         struct device *kdev;
788         struct phy_device *phydev;
789         int i, ret;
790         unsigned int size;
791         char phy_id[MII_BUS_ID_SIZE + 3];
792         void *p;
793         u32 val;
794
795         priv = netdev_priv(dev);
796         kdev = &priv->pdev->dev;
797
798         if (priv->has_phy) {
799                 /* connect to PHY */
800                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
801                          priv->mac_id ? "1" : "0", priv->phy_id);
802
803                 phydev = phy_connect(dev, phy_id, &bcm_enet_adjust_phy_link, 0,
804                                      PHY_INTERFACE_MODE_MII);
805
806                 if (IS_ERR(phydev)) {
807                         dev_err(kdev, "could not attach to PHY\n");
808                         return PTR_ERR(phydev);
809                 }
810
811                 /* mask with MAC supported features */
812                 phydev->supported &= (SUPPORTED_10baseT_Half |
813                                       SUPPORTED_10baseT_Full |
814                                       SUPPORTED_100baseT_Half |
815                                       SUPPORTED_100baseT_Full |
816                                       SUPPORTED_Autoneg |
817                                       SUPPORTED_Pause |
818                                       SUPPORTED_MII);
819                 phydev->advertising = phydev->supported;
820
821                 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
822                         phydev->advertising |= SUPPORTED_Pause;
823                 else
824                         phydev->advertising &= ~SUPPORTED_Pause;
825
826                 dev_info(kdev, "attached PHY at address %d [%s]\n",
827                          phydev->addr, phydev->drv->name);
828
829                 priv->old_link = 0;
830                 priv->old_duplex = -1;
831                 priv->old_pause = -1;
832                 priv->phydev = phydev;
833         }
834
835         /* mask all interrupts and request them */
836         enet_writel(priv, 0, ENET_IRMASK_REG);
837         enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
838         enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
839
840         ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
841         if (ret)
842                 goto out_phy_disconnect;
843
844         ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
845                           IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev);
846         if (ret)
847                 goto out_freeirq;
848
849         ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
850                           IRQF_DISABLED, dev->name, dev);
851         if (ret)
852                 goto out_freeirq_rx;
853
854         /* initialize perfect match registers */
855         for (i = 0; i < 4; i++) {
856                 enet_writel(priv, 0, ENET_PML_REG(i));
857                 enet_writel(priv, 0, ENET_PMH_REG(i));
858         }
859
860         /* write device mac address */
861         memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
862         bcm_enet_set_mac_address(dev, &addr);
863
864         /* allocate rx dma ring */
865         size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
866         p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
867         if (!p) {
868                 dev_err(kdev, "cannot allocate rx ring %u\n", size);
869                 ret = -ENOMEM;
870                 goto out_freeirq_tx;
871         }
872
873         memset(p, 0, size);
874         priv->rx_desc_alloc_size = size;
875         priv->rx_desc_cpu = p;
876
877         /* allocate tx dma ring */
878         size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
879         p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
880         if (!p) {
881                 dev_err(kdev, "cannot allocate tx ring\n");
882                 ret = -ENOMEM;
883                 goto out_free_rx_ring;
884         }
885
886         memset(p, 0, size);
887         priv->tx_desc_alloc_size = size;
888         priv->tx_desc_cpu = p;
889
890         priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
891                                GFP_KERNEL);
892         if (!priv->tx_skb) {
893                 dev_err(kdev, "cannot allocate rx skb queue\n");
894                 ret = -ENOMEM;
895                 goto out_free_tx_ring;
896         }
897
898         priv->tx_desc_count = priv->tx_ring_size;
899         priv->tx_dirty_desc = 0;
900         priv->tx_curr_desc = 0;
901         spin_lock_init(&priv->tx_lock);
902
903         /* init & fill rx ring with skbs */
904         priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
905                                GFP_KERNEL);
906         if (!priv->rx_skb) {
907                 dev_err(kdev, "cannot allocate rx skb queue\n");
908                 ret = -ENOMEM;
909                 goto out_free_tx_skb;
910         }
911
912         priv->rx_desc_count = 0;
913         priv->rx_dirty_desc = 0;
914         priv->rx_curr_desc = 0;
915
916         /* initialize flow control buffer allocation */
917         enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
918                         ENETDMA_BUFALLOC_REG(priv->rx_chan));
919
920         if (bcm_enet_refill_rx(dev)) {
921                 dev_err(kdev, "cannot allocate rx skb queue\n");
922                 ret = -ENOMEM;
923                 goto out;
924         }
925
926         /* write rx & tx ring addresses */
927         enet_dma_writel(priv, priv->rx_desc_dma,
928                         ENETDMA_RSTART_REG(priv->rx_chan));
929         enet_dma_writel(priv, priv->tx_desc_dma,
930                         ENETDMA_RSTART_REG(priv->tx_chan));
931
932         /* clear remaining state ram for rx & tx channel */
933         enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
934         enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
935         enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
936         enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
937         enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
938         enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
939
940         /* set max rx/tx length */
941         enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
942         enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
943
944         /* set dma maximum burst len */
945         enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
946                         ENETDMA_MAXBURST_REG(priv->rx_chan));
947         enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
948                         ENETDMA_MAXBURST_REG(priv->tx_chan));
949
950         /* set correct transmit fifo watermark */
951         enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
952
953         /* set flow control low/high threshold to 1/3 / 2/3 */
954         val = priv->rx_ring_size / 3;
955         enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
956         val = (priv->rx_ring_size * 2) / 3;
957         enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
958
959         /* all set, enable mac and interrupts, start dma engine and
960          * kick rx dma channel */
961         wmb();
962         enet_writel(priv, ENET_CTL_ENABLE_MASK, ENET_CTL_REG);
963         enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
964         enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
965                         ENETDMA_CHANCFG_REG(priv->rx_chan));
966
967         /* watch "mib counters about to overflow" interrupt */
968         enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
969         enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
970
971         /* watch "packet transferred" interrupt in rx and tx */
972         enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
973                         ENETDMA_IR_REG(priv->rx_chan));
974         enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
975                         ENETDMA_IR_REG(priv->tx_chan));
976
977         /* make sure we enable napi before rx interrupt  */
978         napi_enable(&priv->napi);
979
980         enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
981                         ENETDMA_IRMASK_REG(priv->rx_chan));
982         enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
983                         ENETDMA_IRMASK_REG(priv->tx_chan));
984
985         if (priv->has_phy)
986                 phy_start(priv->phydev);
987         else
988                 bcm_enet_adjust_link(dev);
989
990         netif_start_queue(dev);
991         return 0;
992
993 out:
994         for (i = 0; i < priv->rx_ring_size; i++) {
995                 struct bcm_enet_desc *desc;
996
997                 if (!priv->rx_skb[i])
998                         continue;
999
1000                 desc = &priv->rx_desc_cpu[i];
1001                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1002                                  DMA_FROM_DEVICE);
1003                 kfree_skb(priv->rx_skb[i]);
1004         }
1005         kfree(priv->rx_skb);
1006
1007 out_free_tx_skb:
1008         kfree(priv->tx_skb);
1009
1010 out_free_tx_ring:
1011         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1012                           priv->tx_desc_cpu, priv->tx_desc_dma);
1013
1014 out_free_rx_ring:
1015         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1016                           priv->rx_desc_cpu, priv->rx_desc_dma);
1017
1018 out_freeirq_tx:
1019         free_irq(priv->irq_tx, dev);
1020
1021 out_freeirq_rx:
1022         free_irq(priv->irq_rx, dev);
1023
1024 out_freeirq:
1025         free_irq(dev->irq, dev);
1026
1027 out_phy_disconnect:
1028         phy_disconnect(priv->phydev);
1029
1030         return ret;
1031 }
1032
1033 /*
1034  * disable mac
1035  */
1036 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1037 {
1038         int limit;
1039         u32 val;
1040
1041         val = enet_readl(priv, ENET_CTL_REG);
1042         val |= ENET_CTL_DISABLE_MASK;
1043         enet_writel(priv, val, ENET_CTL_REG);
1044
1045         limit = 1000;
1046         do {
1047                 u32 val;
1048
1049                 val = enet_readl(priv, ENET_CTL_REG);
1050                 if (!(val & ENET_CTL_DISABLE_MASK))
1051                         break;
1052                 udelay(1);
1053         } while (limit--);
1054 }
1055
1056 /*
1057  * disable dma in given channel
1058  */
1059 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1060 {
1061         int limit;
1062
1063         enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
1064
1065         limit = 1000;
1066         do {
1067                 u32 val;
1068
1069                 val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
1070                 if (!(val & ENETDMA_CHANCFG_EN_MASK))
1071                         break;
1072                 udelay(1);
1073         } while (limit--);
1074 }
1075
1076 /*
1077  * stop callback
1078  */
1079 static int bcm_enet_stop(struct net_device *dev)
1080 {
1081         struct bcm_enet_priv *priv;
1082         struct device *kdev;
1083         int i;
1084
1085         priv = netdev_priv(dev);
1086         kdev = &priv->pdev->dev;
1087
1088         netif_stop_queue(dev);
1089         napi_disable(&priv->napi);
1090         if (priv->has_phy)
1091                 phy_stop(priv->phydev);
1092         del_timer_sync(&priv->rx_timeout);
1093
1094         /* mask all interrupts */
1095         enet_writel(priv, 0, ENET_IRMASK_REG);
1096         enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
1097         enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
1098
1099         /* make sure no mib update is scheduled */
1100         flush_scheduled_work();
1101
1102         /* disable dma & mac */
1103         bcm_enet_disable_dma(priv, priv->tx_chan);
1104         bcm_enet_disable_dma(priv, priv->rx_chan);
1105         bcm_enet_disable_mac(priv);
1106
1107         /* force reclaim of all tx buffers */
1108         bcm_enet_tx_reclaim(dev, 1);
1109
1110         /* free the rx skb ring */
1111         for (i = 0; i < priv->rx_ring_size; i++) {
1112                 struct bcm_enet_desc *desc;
1113
1114                 if (!priv->rx_skb[i])
1115                         continue;
1116
1117                 desc = &priv->rx_desc_cpu[i];
1118                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1119                                  DMA_FROM_DEVICE);
1120                 kfree_skb(priv->rx_skb[i]);
1121         }
1122
1123         /* free remaining allocated memory */
1124         kfree(priv->rx_skb);
1125         kfree(priv->tx_skb);
1126         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1127                           priv->rx_desc_cpu, priv->rx_desc_dma);
1128         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1129                           priv->tx_desc_cpu, priv->tx_desc_dma);
1130         free_irq(priv->irq_tx, dev);
1131         free_irq(priv->irq_rx, dev);
1132         free_irq(dev->irq, dev);
1133
1134         /* release phy */
1135         if (priv->has_phy) {
1136                 phy_disconnect(priv->phydev);
1137                 priv->phydev = NULL;
1138         }
1139
1140         return 0;
1141 }
1142
1143 /*
1144  * core request to return device rx/tx stats
1145  */
1146 static struct net_device_stats *bcm_enet_get_stats(struct net_device *dev)
1147 {
1148         struct bcm_enet_priv *priv;
1149
1150         priv = netdev_priv(dev);
1151         return &priv->stats;
1152 }
1153
1154 /*
1155  * ethtool callbacks
1156  */
1157 struct bcm_enet_stats {
1158         char stat_string[ETH_GSTRING_LEN];
1159         int sizeof_stat;
1160         int stat_offset;
1161         int mib_reg;
1162 };
1163
1164 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m),             \
1165                      offsetof(struct bcm_enet_priv, m)
1166
1167 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1168         { "rx_packets", GEN_STAT(stats.rx_packets), -1 },
1169         { "tx_packets", GEN_STAT(stats.tx_packets), -1 },
1170         { "rx_bytes", GEN_STAT(stats.rx_bytes), -1 },
1171         { "tx_bytes", GEN_STAT(stats.tx_bytes), -1 },
1172         { "rx_errors", GEN_STAT(stats.rx_errors), -1 },
1173         { "tx_errors", GEN_STAT(stats.tx_errors), -1 },
1174         { "rx_dropped", GEN_STAT(stats.rx_dropped), -1 },
1175         { "tx_dropped", GEN_STAT(stats.tx_dropped), -1 },
1176
1177         { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1178         { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1179         { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1180         { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1181         { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1182         { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1183         { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1184         { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1185         { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1186         { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1187         { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1188         { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1189         { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1190         { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1191         { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1192         { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1193         { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1194         { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1195         { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1196         { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1197         { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1198
1199         { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1200         { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1201         { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1202         { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1203         { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1204         { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1205         { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1206         { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1207         { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1208         { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1209         { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1210         { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1211         { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1212         { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1213         { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1214         { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1215         { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1216         { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1217         { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1218         { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1219         { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1220         { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1221
1222 };
1223
1224 #define BCM_ENET_STATS_LEN      \
1225         (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
1226
1227 static const u32 unused_mib_regs[] = {
1228         ETH_MIB_TX_ALL_OCTETS,
1229         ETH_MIB_TX_ALL_PKTS,
1230         ETH_MIB_RX_ALL_OCTETS,
1231         ETH_MIB_RX_ALL_PKTS,
1232 };
1233
1234
1235 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1236                                  struct ethtool_drvinfo *drvinfo)
1237 {
1238         strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
1239         strncpy(drvinfo->version, bcm_enet_driver_version, 32);
1240         strncpy(drvinfo->fw_version, "N/A", 32);
1241         strncpy(drvinfo->bus_info, "bcm63xx", 32);
1242         drvinfo->n_stats = BCM_ENET_STATS_LEN;
1243 }
1244
1245 static int bcm_enet_get_sset_count(struct net_device *netdev,
1246                                         int string_set)
1247 {
1248         switch (string_set) {
1249         case ETH_SS_STATS:
1250                 return BCM_ENET_STATS_LEN;
1251         default:
1252                 return -EINVAL;
1253         }
1254 }
1255
1256 static void bcm_enet_get_strings(struct net_device *netdev,
1257                                  u32 stringset, u8 *data)
1258 {
1259         int i;
1260
1261         switch (stringset) {
1262         case ETH_SS_STATS:
1263                 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1264                         memcpy(data + i * ETH_GSTRING_LEN,
1265                                bcm_enet_gstrings_stats[i].stat_string,
1266                                ETH_GSTRING_LEN);
1267                 }
1268                 break;
1269         }
1270 }
1271
1272 static void update_mib_counters(struct bcm_enet_priv *priv)
1273 {
1274         int i;
1275
1276         for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1277                 const struct bcm_enet_stats *s;
1278                 u32 val;
1279                 char *p;
1280
1281                 s = &bcm_enet_gstrings_stats[i];
1282                 if (s->mib_reg == -1)
1283                         continue;
1284
1285                 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1286                 p = (char *)priv + s->stat_offset;
1287
1288                 if (s->sizeof_stat == sizeof(u64))
1289                         *(u64 *)p += val;
1290                 else
1291                         *(u32 *)p += val;
1292         }
1293
1294         /* also empty unused mib counters to make sure mib counter
1295          * overflow interrupt is cleared */
1296         for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1297                 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1298 }
1299
1300 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1301 {
1302         struct bcm_enet_priv *priv;
1303
1304         priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1305         mutex_lock(&priv->mib_update_lock);
1306         update_mib_counters(priv);
1307         mutex_unlock(&priv->mib_update_lock);
1308
1309         /* reenable mib interrupt */
1310         if (netif_running(priv->net_dev))
1311                 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1312 }
1313
1314 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1315                                        struct ethtool_stats *stats,
1316                                        u64 *data)
1317 {
1318         struct bcm_enet_priv *priv;
1319         int i;
1320
1321         priv = netdev_priv(netdev);
1322
1323         mutex_lock(&priv->mib_update_lock);
1324         update_mib_counters(priv);
1325
1326         for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1327                 const struct bcm_enet_stats *s;
1328                 char *p;
1329
1330                 s = &bcm_enet_gstrings_stats[i];
1331                 p = (char *)priv + s->stat_offset;
1332                 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1333                         *(u64 *)p : *(u32 *)p;
1334         }
1335         mutex_unlock(&priv->mib_update_lock);
1336 }
1337
1338 static int bcm_enet_get_settings(struct net_device *dev,
1339                                  struct ethtool_cmd *cmd)
1340 {
1341         struct bcm_enet_priv *priv;
1342
1343         priv = netdev_priv(dev);
1344
1345         cmd->maxrxpkt = 0;
1346         cmd->maxtxpkt = 0;
1347
1348         if (priv->has_phy) {
1349                 if (!priv->phydev)
1350                         return -ENODEV;
1351                 return phy_ethtool_gset(priv->phydev, cmd);
1352         } else {
1353                 cmd->autoneg = 0;
1354                 cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
1355                 cmd->duplex = (priv->force_duplex_full) ?
1356                         DUPLEX_FULL : DUPLEX_HALF;
1357                 cmd->supported = ADVERTISED_10baseT_Half  |
1358                         ADVERTISED_10baseT_Full |
1359                         ADVERTISED_100baseT_Half |
1360                         ADVERTISED_100baseT_Full;
1361                 cmd->advertising = 0;
1362                 cmd->port = PORT_MII;
1363                 cmd->transceiver = XCVR_EXTERNAL;
1364         }
1365         return 0;
1366 }
1367
1368 static int bcm_enet_set_settings(struct net_device *dev,
1369                                  struct ethtool_cmd *cmd)
1370 {
1371         struct bcm_enet_priv *priv;
1372
1373         priv = netdev_priv(dev);
1374         if (priv->has_phy) {
1375                 if (!priv->phydev)
1376                         return -ENODEV;
1377                 return phy_ethtool_sset(priv->phydev, cmd);
1378         } else {
1379
1380                 if (cmd->autoneg ||
1381                     (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1382                     cmd->port != PORT_MII)
1383                         return -EINVAL;
1384
1385                 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1386                 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1387
1388                 if (netif_running(dev))
1389                         bcm_enet_adjust_link(dev);
1390                 return 0;
1391         }
1392 }
1393
1394 static void bcm_enet_get_ringparam(struct net_device *dev,
1395                                    struct ethtool_ringparam *ering)
1396 {
1397         struct bcm_enet_priv *priv;
1398
1399         priv = netdev_priv(dev);
1400
1401         /* rx/tx ring is actually only limited by memory */
1402         ering->rx_max_pending = 8192;
1403         ering->tx_max_pending = 8192;
1404         ering->rx_mini_max_pending = 0;
1405         ering->rx_jumbo_max_pending = 0;
1406         ering->rx_pending = priv->rx_ring_size;
1407         ering->tx_pending = priv->tx_ring_size;
1408 }
1409
1410 static int bcm_enet_set_ringparam(struct net_device *dev,
1411                                   struct ethtool_ringparam *ering)
1412 {
1413         struct bcm_enet_priv *priv;
1414         int was_running;
1415
1416         priv = netdev_priv(dev);
1417
1418         was_running = 0;
1419         if (netif_running(dev)) {
1420                 bcm_enet_stop(dev);
1421                 was_running = 1;
1422         }
1423
1424         priv->rx_ring_size = ering->rx_pending;
1425         priv->tx_ring_size = ering->tx_pending;
1426
1427         if (was_running) {
1428                 int err;
1429
1430                 err = bcm_enet_open(dev);
1431                 if (err)
1432                         dev_close(dev);
1433                 else
1434                         bcm_enet_set_multicast_list(dev);
1435         }
1436         return 0;
1437 }
1438
1439 static void bcm_enet_get_pauseparam(struct net_device *dev,
1440                                     struct ethtool_pauseparam *ecmd)
1441 {
1442         struct bcm_enet_priv *priv;
1443
1444         priv = netdev_priv(dev);
1445         ecmd->autoneg = priv->pause_auto;
1446         ecmd->rx_pause = priv->pause_rx;
1447         ecmd->tx_pause = priv->pause_tx;
1448 }
1449
1450 static int bcm_enet_set_pauseparam(struct net_device *dev,
1451                                    struct ethtool_pauseparam *ecmd)
1452 {
1453         struct bcm_enet_priv *priv;
1454
1455         priv = netdev_priv(dev);
1456
1457         if (priv->has_phy) {
1458                 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1459                         /* asymetric pause mode not supported,
1460                          * actually possible but integrated PHY has RO
1461                          * asym_pause bit */
1462                         return -EINVAL;
1463                 }
1464         } else {
1465                 /* no pause autoneg on direct mii connection */
1466                 if (ecmd->autoneg)
1467                         return -EINVAL;
1468         }
1469
1470         priv->pause_auto = ecmd->autoneg;
1471         priv->pause_rx = ecmd->rx_pause;
1472         priv->pause_tx = ecmd->tx_pause;
1473
1474         return 0;
1475 }
1476
1477 static struct ethtool_ops bcm_enet_ethtool_ops = {
1478         .get_strings            = bcm_enet_get_strings,
1479         .get_sset_count         = bcm_enet_get_sset_count,
1480         .get_ethtool_stats      = bcm_enet_get_ethtool_stats,
1481         .get_settings           = bcm_enet_get_settings,
1482         .set_settings           = bcm_enet_set_settings,
1483         .get_drvinfo            = bcm_enet_get_drvinfo,
1484         .get_link               = ethtool_op_get_link,
1485         .get_ringparam          = bcm_enet_get_ringparam,
1486         .set_ringparam          = bcm_enet_set_ringparam,
1487         .get_pauseparam         = bcm_enet_get_pauseparam,
1488         .set_pauseparam         = bcm_enet_set_pauseparam,
1489 };
1490
1491 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1492 {
1493         struct bcm_enet_priv *priv;
1494
1495         priv = netdev_priv(dev);
1496         if (priv->has_phy) {
1497                 if (!priv->phydev)
1498                         return -ENODEV;
1499                 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
1500         } else {
1501                 struct mii_if_info mii;
1502
1503                 mii.dev = dev;
1504                 mii.mdio_read = bcm_enet_mdio_read_mii;
1505                 mii.mdio_write = bcm_enet_mdio_write_mii;
1506                 mii.phy_id = 0;
1507                 mii.phy_id_mask = 0x3f;
1508                 mii.reg_num_mask = 0x1f;
1509                 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1510         }
1511 }
1512
1513 /*
1514  * calculate actual hardware mtu
1515  */
1516 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1517 {
1518         int actual_mtu;
1519
1520         actual_mtu = mtu;
1521
1522         /* add ethernet header + vlan tag size */
1523         actual_mtu += VLAN_ETH_HLEN;
1524
1525         if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1526                 return -EINVAL;
1527
1528         /*
1529          * setup maximum size before we get overflow mark in
1530          * descriptor, note that this will not prevent reception of
1531          * big frames, they will be split into multiple buffers
1532          * anyway
1533          */
1534         priv->hw_mtu = actual_mtu;
1535
1536         /*
1537          * align rx buffer size to dma burst len, account FCS since
1538          * it's appended
1539          */
1540         priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1541                                   BCMENET_DMA_MAXBURST * 4);
1542         return 0;
1543 }
1544
1545 /*
1546  * adjust mtu, can't be called while device is running
1547  */
1548 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1549 {
1550         int ret;
1551
1552         if (netif_running(dev))
1553                 return -EBUSY;
1554
1555         ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1556         if (ret)
1557                 return ret;
1558         dev->mtu = new_mtu;
1559         return 0;
1560 }
1561
1562 /*
1563  * preinit hardware to allow mii operation while device is down
1564  */
1565 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1566 {
1567         u32 val;
1568         int limit;
1569
1570         /* make sure mac is disabled */
1571         bcm_enet_disable_mac(priv);
1572
1573         /* soft reset mac */
1574         val = ENET_CTL_SRESET_MASK;
1575         enet_writel(priv, val, ENET_CTL_REG);
1576         wmb();
1577
1578         limit = 1000;
1579         do {
1580                 val = enet_readl(priv, ENET_CTL_REG);
1581                 if (!(val & ENET_CTL_SRESET_MASK))
1582                         break;
1583                 udelay(1);
1584         } while (limit--);
1585
1586         /* select correct mii interface */
1587         val = enet_readl(priv, ENET_CTL_REG);
1588         if (priv->use_external_mii)
1589                 val |= ENET_CTL_EPHYSEL_MASK;
1590         else
1591                 val &= ~ENET_CTL_EPHYSEL_MASK;
1592         enet_writel(priv, val, ENET_CTL_REG);
1593
1594         /* turn on mdc clock */
1595         enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1596                     ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1597
1598         /* set mib counters to self-clear when read */
1599         val = enet_readl(priv, ENET_MIBCTL_REG);
1600         val |= ENET_MIBCTL_RDCLEAR_MASK;
1601         enet_writel(priv, val, ENET_MIBCTL_REG);
1602 }
1603
1604 static const struct net_device_ops bcm_enet_ops = {
1605         .ndo_open               = bcm_enet_open,
1606         .ndo_stop               = bcm_enet_stop,
1607         .ndo_start_xmit         = bcm_enet_start_xmit,
1608         .ndo_get_stats          = bcm_enet_get_stats,
1609         .ndo_set_mac_address    = bcm_enet_set_mac_address,
1610         .ndo_set_multicast_list = bcm_enet_set_multicast_list,
1611         .ndo_do_ioctl           = bcm_enet_ioctl,
1612         .ndo_change_mtu         = bcm_enet_change_mtu,
1613 #ifdef CONFIG_NET_POLL_CONTROLLER
1614         .ndo_poll_controller = bcm_enet_netpoll,
1615 #endif
1616 };
1617
1618 /*
1619  * allocate netdevice, request register memory and register device.
1620  */
1621 static int __devinit bcm_enet_probe(struct platform_device *pdev)
1622 {
1623         struct bcm_enet_priv *priv;
1624         struct net_device *dev;
1625         struct bcm63xx_enet_platform_data *pd;
1626         struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1627         struct mii_bus *bus;
1628         const char *clk_name;
1629         unsigned int iomem_size;
1630         int i, ret;
1631
1632         /* stop if shared driver failed, assume driver->probe will be
1633          * called in the same order we register devices (correct ?) */
1634         if (!bcm_enet_shared_base)
1635                 return -ENODEV;
1636
1637         res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1638         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1639         res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1640         res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1641         if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
1642                 return -ENODEV;
1643
1644         ret = 0;
1645         dev = alloc_etherdev(sizeof(*priv));
1646         if (!dev)
1647                 return -ENOMEM;
1648         priv = netdev_priv(dev);
1649         memset(priv, 0, sizeof(*priv));
1650
1651         ret = compute_hw_mtu(priv, dev->mtu);
1652         if (ret)
1653                 goto out;
1654
1655         iomem_size = res_mem->end - res_mem->start + 1;
1656         if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
1657                 ret = -EBUSY;
1658                 goto out;
1659         }
1660
1661         priv->base = ioremap(res_mem->start, iomem_size);
1662         if (priv->base == NULL) {
1663                 ret = -ENOMEM;
1664                 goto out_release_mem;
1665         }
1666         dev->irq = priv->irq = res_irq->start;
1667         priv->irq_rx = res_irq_rx->start;
1668         priv->irq_tx = res_irq_tx->start;
1669         priv->mac_id = pdev->id;
1670
1671         /* get rx & tx dma channel id for this mac */
1672         if (priv->mac_id == 0) {
1673                 priv->rx_chan = 0;
1674                 priv->tx_chan = 1;
1675                 clk_name = "enet0";
1676         } else {
1677                 priv->rx_chan = 2;
1678                 priv->tx_chan = 3;
1679                 clk_name = "enet1";
1680         }
1681
1682         priv->mac_clk = clk_get(&pdev->dev, clk_name);
1683         if (IS_ERR(priv->mac_clk)) {
1684                 ret = PTR_ERR(priv->mac_clk);
1685                 goto out_unmap;
1686         }
1687         clk_enable(priv->mac_clk);
1688
1689         /* initialize default and fetch platform data */
1690         priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1691         priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1692
1693         pd = pdev->dev.platform_data;
1694         if (pd) {
1695                 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1696                 priv->has_phy = pd->has_phy;
1697                 priv->phy_id = pd->phy_id;
1698                 priv->has_phy_interrupt = pd->has_phy_interrupt;
1699                 priv->phy_interrupt = pd->phy_interrupt;
1700                 priv->use_external_mii = !pd->use_internal_phy;
1701                 priv->pause_auto = pd->pause_auto;
1702                 priv->pause_rx = pd->pause_rx;
1703                 priv->pause_tx = pd->pause_tx;
1704                 priv->force_duplex_full = pd->force_duplex_full;
1705                 priv->force_speed_100 = pd->force_speed_100;
1706         }
1707
1708         if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1709                 /* using internal PHY, enable clock */
1710                 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1711                 if (IS_ERR(priv->phy_clk)) {
1712                         ret = PTR_ERR(priv->phy_clk);
1713                         priv->phy_clk = NULL;
1714                         goto out_put_clk_mac;
1715                 }
1716                 clk_enable(priv->phy_clk);
1717         }
1718
1719         /* do minimal hardware init to be able to probe mii bus */
1720         bcm_enet_hw_preinit(priv);
1721
1722         /* MII bus registration */
1723         if (priv->has_phy) {
1724
1725                 priv->mii_bus = mdiobus_alloc();
1726                 if (!priv->mii_bus) {
1727                         ret = -ENOMEM;
1728                         goto out_uninit_hw;
1729                 }
1730
1731                 bus = priv->mii_bus;
1732                 bus->name = "bcm63xx_enet MII bus";
1733                 bus->parent = &pdev->dev;
1734                 bus->priv = priv;
1735                 bus->read = bcm_enet_mdio_read_phylib;
1736                 bus->write = bcm_enet_mdio_write_phylib;
1737                 sprintf(bus->id, "%d", priv->mac_id);
1738
1739                 /* only probe bus where we think the PHY is, because
1740                  * the mdio read operation return 0 instead of 0xffff
1741                  * if a slave is not present on hw */
1742                 bus->phy_mask = ~(1 << priv->phy_id);
1743
1744                 bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
1745                 if (!bus->irq) {
1746                         ret = -ENOMEM;
1747                         goto out_free_mdio;
1748                 }
1749
1750                 if (priv->has_phy_interrupt)
1751                         bus->irq[priv->phy_id] = priv->phy_interrupt;
1752                 else
1753                         bus->irq[priv->phy_id] = PHY_POLL;
1754
1755                 ret = mdiobus_register(bus);
1756                 if (ret) {
1757                         dev_err(&pdev->dev, "unable to register mdio bus\n");
1758                         goto out_free_mdio;
1759                 }
1760         } else {
1761
1762                 /* run platform code to initialize PHY device */
1763                 if (pd->mii_config &&
1764                     pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1765                                    bcm_enet_mdio_write_mii)) {
1766                         dev_err(&pdev->dev, "unable to configure mdio bus\n");
1767                         goto out_uninit_hw;
1768                 }
1769         }
1770
1771         spin_lock_init(&priv->rx_lock);
1772
1773         /* init rx timeout (used for oom) */
1774         init_timer(&priv->rx_timeout);
1775         priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1776         priv->rx_timeout.data = (unsigned long)dev;
1777
1778         /* init the mib update lock&work */
1779         mutex_init(&priv->mib_update_lock);
1780         INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1781
1782         /* zero mib counters */
1783         for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1784                 enet_writel(priv, 0, ENET_MIB_REG(i));
1785
1786         /* register netdevice */
1787         dev->netdev_ops = &bcm_enet_ops;
1788         netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1789
1790         SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
1791         SET_NETDEV_DEV(dev, &pdev->dev);
1792
1793         ret = register_netdev(dev);
1794         if (ret)
1795                 goto out_unregister_mdio;
1796
1797         netif_carrier_off(dev);
1798         platform_set_drvdata(pdev, dev);
1799         priv->pdev = pdev;
1800         priv->net_dev = dev;
1801
1802         return 0;
1803
1804 out_unregister_mdio:
1805         if (priv->mii_bus) {
1806                 mdiobus_unregister(priv->mii_bus);
1807                 kfree(priv->mii_bus->irq);
1808         }
1809
1810 out_free_mdio:
1811         if (priv->mii_bus)
1812                 mdiobus_free(priv->mii_bus);
1813
1814 out_uninit_hw:
1815         /* turn off mdc clock */
1816         enet_writel(priv, 0, ENET_MIISC_REG);
1817         if (priv->phy_clk) {
1818                 clk_disable(priv->phy_clk);
1819                 clk_put(priv->phy_clk);
1820         }
1821
1822 out_put_clk_mac:
1823         clk_disable(priv->mac_clk);
1824         clk_put(priv->mac_clk);
1825
1826 out_unmap:
1827         iounmap(priv->base);
1828
1829 out_release_mem:
1830         release_mem_region(res_mem->start, iomem_size);
1831 out:
1832         free_netdev(dev);
1833         return ret;
1834 }
1835
1836
1837 /*
1838  * exit func, stops hardware and unregisters netdevice
1839  */
1840 static int __devexit bcm_enet_remove(struct platform_device *pdev)
1841 {
1842         struct bcm_enet_priv *priv;
1843         struct net_device *dev;
1844         struct resource *res;
1845
1846         /* stop netdevice */
1847         dev = platform_get_drvdata(pdev);
1848         priv = netdev_priv(dev);
1849         unregister_netdev(dev);
1850
1851         /* turn off mdc clock */
1852         enet_writel(priv, 0, ENET_MIISC_REG);
1853
1854         if (priv->has_phy) {
1855                 mdiobus_unregister(priv->mii_bus);
1856                 kfree(priv->mii_bus->irq);
1857                 mdiobus_free(priv->mii_bus);
1858         } else {
1859                 struct bcm63xx_enet_platform_data *pd;
1860
1861                 pd = pdev->dev.platform_data;
1862                 if (pd && pd->mii_config)
1863                         pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1864                                        bcm_enet_mdio_write_mii);
1865         }
1866
1867         /* release device resources */
1868         iounmap(priv->base);
1869         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1870         release_mem_region(res->start, res->end - res->start + 1);
1871
1872         /* disable hw block clocks */
1873         if (priv->phy_clk) {
1874                 clk_disable(priv->phy_clk);
1875                 clk_put(priv->phy_clk);
1876         }
1877         clk_disable(priv->mac_clk);
1878         clk_put(priv->mac_clk);
1879
1880         platform_set_drvdata(pdev, NULL);
1881         free_netdev(dev);
1882         return 0;
1883 }
1884
1885 struct platform_driver bcm63xx_enet_driver = {
1886         .probe  = bcm_enet_probe,
1887         .remove = __devexit_p(bcm_enet_remove),
1888         .driver = {
1889                 .name   = "bcm63xx_enet",
1890                 .owner  = THIS_MODULE,
1891         },
1892 };
1893
1894 /*
1895  * reserve & remap memory space shared between all macs
1896  */
1897 static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
1898 {
1899         struct resource *res;
1900         unsigned int iomem_size;
1901
1902         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1903         if (!res)
1904                 return -ENODEV;
1905
1906         iomem_size = res->end - res->start + 1;
1907         if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
1908                 return -EBUSY;
1909
1910         bcm_enet_shared_base = ioremap(res->start, iomem_size);
1911         if (!bcm_enet_shared_base) {
1912                 release_mem_region(res->start, iomem_size);
1913                 return -ENOMEM;
1914         }
1915         return 0;
1916 }
1917
1918 static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
1919 {
1920         struct resource *res;
1921
1922         iounmap(bcm_enet_shared_base);
1923         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1924         release_mem_region(res->start, res->end - res->start + 1);
1925         return 0;
1926 }
1927
1928 /*
1929  * this "shared" driver is needed because both macs share a single
1930  * address space
1931  */
1932 struct platform_driver bcm63xx_enet_shared_driver = {
1933         .probe  = bcm_enet_shared_probe,
1934         .remove = __devexit_p(bcm_enet_shared_remove),
1935         .driver = {
1936                 .name   = "bcm63xx_enet_shared",
1937                 .owner  = THIS_MODULE,
1938         },
1939 };
1940
1941 /*
1942  * entry point
1943  */
1944 static int __init bcm_enet_init(void)
1945 {
1946         int ret;
1947
1948         ret = platform_driver_register(&bcm63xx_enet_shared_driver);
1949         if (ret)
1950                 return ret;
1951
1952         ret = platform_driver_register(&bcm63xx_enet_driver);
1953         if (ret)
1954                 platform_driver_unregister(&bcm63xx_enet_shared_driver);
1955
1956         return ret;
1957 }
1958
1959 static void __exit bcm_enet_exit(void)
1960 {
1961         platform_driver_unregister(&bcm63xx_enet_driver);
1962         platform_driver_unregister(&bcm63xx_enet_shared_driver);
1963 }
1964
1965
1966 module_init(bcm_enet_init);
1967 module_exit(bcm_enet_exit);
1968
1969 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
1970 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
1971 MODULE_LICENSE("GPL");