of/device: Replace struct of_device with struct platform_device
[linux-2.6.git] / drivers / net / fec_mpc52xx.c
1 /*
2  * Driver for the MPC5200 Fast Ethernet Controller
3  *
4  * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
5  * now maintained by Sylvain Munaut <tnt@246tNt.com>
6  *
7  * Copyright (C) 2007  Domen Puncer, Telargo, Inc.
8  * Copyright (C) 2007  Sylvain Munaut <tnt@246tNt.com>
9  * Copyright (C) 2003-2004  MontaVista, Software, Inc.
10  *
11  * This file is licensed under the terms of the GNU General Public License
12  * version 2. This program is licensed "as is" without any warranty of any
13  * kind, whether express or implied.
14  *
15  */
16
17 #include <linux/module.h>
18
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/spinlock.h>
22 #include <linux/slab.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/crc32.h>
26 #include <linux/hardirq.h>
27 #include <linux/delay.h>
28 #include <linux/of_device.h>
29 #include <linux/of_mdio.h>
30 #include <linux/of_platform.h>
31
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/ethtool.h>
35 #include <linux/skbuff.h>
36
37 #include <asm/io.h>
38 #include <asm/delay.h>
39 #include <asm/mpc52xx.h>
40
41 #include <sysdev/bestcomm/bestcomm.h>
42 #include <sysdev/bestcomm/fec.h>
43
44 #include "fec_mpc52xx.h"
45
46 #define DRIVER_NAME "mpc52xx-fec"
47
48 /* Private driver data structure */
49 struct mpc52xx_fec_priv {
50         struct net_device *ndev;
51         int duplex;
52         int speed;
53         int r_irq;
54         int t_irq;
55         struct mpc52xx_fec __iomem *fec;
56         struct bcom_task *rx_dmatsk;
57         struct bcom_task *tx_dmatsk;
58         spinlock_t lock;
59         int msg_enable;
60
61         /* MDIO link details */
62         unsigned int mdio_speed;
63         struct device_node *phy_node;
64         struct phy_device *phydev;
65         enum phy_state link;
66         int seven_wire_mode;
67 };
68
69
70 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
71 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
72 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
73 static void mpc52xx_fec_stop(struct net_device *dev);
74 static void mpc52xx_fec_start(struct net_device *dev);
75 static void mpc52xx_fec_reset(struct net_device *dev);
76
77 static u8 mpc52xx_fec_mac_addr[6];
78 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
79 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
80
81 #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
82                 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
83 static int debug = -1;  /* the above default */
84 module_param(debug, int, 0);
85 MODULE_PARM_DESC(debug, "debugging messages level");
86
87 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
88 {
89         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
90         unsigned long flags;
91
92         dev_warn(&dev->dev, "transmit timed out\n");
93
94         spin_lock_irqsave(&priv->lock, flags);
95         mpc52xx_fec_reset(dev);
96         dev->stats.tx_errors++;
97         spin_unlock_irqrestore(&priv->lock, flags);
98
99         netif_wake_queue(dev);
100 }
101
102 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
103 {
104         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
105         struct mpc52xx_fec __iomem *fec = priv->fec;
106
107         out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
108         out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
109 }
110
111 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
112 {
113         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
114         struct mpc52xx_fec __iomem *fec = priv->fec;
115
116         *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
117         *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
118 }
119
120 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
121 {
122         struct sockaddr *sock = addr;
123
124         memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
125
126         mpc52xx_fec_set_paddr(dev, sock->sa_data);
127         return 0;
128 }
129
130 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
131 {
132         while (!bcom_queue_empty(s)) {
133                 struct bcom_fec_bd *bd;
134                 struct sk_buff *skb;
135
136                 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
137                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
138                                  DMA_FROM_DEVICE);
139                 kfree_skb(skb);
140         }
141 }
142
143 static void
144 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
145 {
146         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
147         struct bcom_fec_bd *bd;
148
149         bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
150         bd->status = FEC_RX_BUFFER_SIZE;
151         bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
152                                     FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
153         bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
154 }
155
156 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
157 {
158         struct sk_buff *skb;
159
160         while (!bcom_queue_full(rxtsk)) {
161                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
162                 if (!skb)
163                         return -EAGAIN;
164
165                 /* zero out the initial receive buffers to aid debugging */
166                 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
167                 mpc52xx_fec_rx_submit(dev, skb);
168         }
169         return 0;
170 }
171
172 /* based on generic_adjust_link from fs_enet-main.c */
173 static void mpc52xx_fec_adjust_link(struct net_device *dev)
174 {
175         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
176         struct phy_device *phydev = priv->phydev;
177         int new_state = 0;
178
179         if (phydev->link != PHY_DOWN) {
180                 if (phydev->duplex != priv->duplex) {
181                         struct mpc52xx_fec __iomem *fec = priv->fec;
182                         u32 rcntrl;
183                         u32 tcntrl;
184
185                         new_state = 1;
186                         priv->duplex = phydev->duplex;
187
188                         rcntrl = in_be32(&fec->r_cntrl);
189                         tcntrl = in_be32(&fec->x_cntrl);
190
191                         rcntrl &= ~FEC_RCNTRL_DRT;
192                         tcntrl &= ~FEC_TCNTRL_FDEN;
193                         if (phydev->duplex == DUPLEX_FULL)
194                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
195                         else
196                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
197
198                         out_be32(&fec->r_cntrl, rcntrl);
199                         out_be32(&fec->x_cntrl, tcntrl);
200                 }
201
202                 if (phydev->speed != priv->speed) {
203                         new_state = 1;
204                         priv->speed = phydev->speed;
205                 }
206
207                 if (priv->link == PHY_DOWN) {
208                         new_state = 1;
209                         priv->link = phydev->link;
210                 }
211
212         } else if (priv->link) {
213                 new_state = 1;
214                 priv->link = PHY_DOWN;
215                 priv->speed = 0;
216                 priv->duplex = -1;
217         }
218
219         if (new_state && netif_msg_link(priv))
220                 phy_print_status(phydev);
221 }
222
223 static int mpc52xx_fec_open(struct net_device *dev)
224 {
225         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
226         int err = -EBUSY;
227
228         if (priv->phy_node) {
229                 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
230                                               mpc52xx_fec_adjust_link, 0, 0);
231                 if (!priv->phydev) {
232                         dev_err(&dev->dev, "of_phy_connect failed\n");
233                         return -ENODEV;
234                 }
235                 phy_start(priv->phydev);
236         }
237
238         if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
239                         DRIVER_NAME "_ctrl", dev)) {
240                 dev_err(&dev->dev, "ctrl interrupt request failed\n");
241                 goto free_phy;
242         }
243         if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
244                         DRIVER_NAME "_rx", dev)) {
245                 dev_err(&dev->dev, "rx interrupt request failed\n");
246                 goto free_ctrl_irq;
247         }
248         if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
249                         DRIVER_NAME "_tx", dev)) {
250                 dev_err(&dev->dev, "tx interrupt request failed\n");
251                 goto free_2irqs;
252         }
253
254         bcom_fec_rx_reset(priv->rx_dmatsk);
255         bcom_fec_tx_reset(priv->tx_dmatsk);
256
257         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
258         if (err) {
259                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
260                 goto free_irqs;
261         }
262
263         bcom_enable(priv->rx_dmatsk);
264         bcom_enable(priv->tx_dmatsk);
265
266         mpc52xx_fec_start(dev);
267
268         netif_start_queue(dev);
269
270         return 0;
271
272  free_irqs:
273         free_irq(priv->t_irq, dev);
274  free_2irqs:
275         free_irq(priv->r_irq, dev);
276  free_ctrl_irq:
277         free_irq(dev->irq, dev);
278  free_phy:
279         if (priv->phydev) {
280                 phy_stop(priv->phydev);
281                 phy_disconnect(priv->phydev);
282                 priv->phydev = NULL;
283         }
284
285         return err;
286 }
287
288 static int mpc52xx_fec_close(struct net_device *dev)
289 {
290         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
291
292         netif_stop_queue(dev);
293
294         mpc52xx_fec_stop(dev);
295
296         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
297
298         free_irq(dev->irq, dev);
299         free_irq(priv->r_irq, dev);
300         free_irq(priv->t_irq, dev);
301
302         if (priv->phydev) {
303                 /* power down phy */
304                 phy_stop(priv->phydev);
305                 phy_disconnect(priv->phydev);
306                 priv->phydev = NULL;
307         }
308
309         return 0;
310 }
311
312 /* This will only be invoked if your driver is _not_ in XOFF state.
313  * What this means is that you need not check it, and that this
314  * invariant will hold if you make sure that the netif_*_queue()
315  * calls are done at the proper times.
316  */
317 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
318 {
319         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
320         struct bcom_fec_bd *bd;
321         unsigned long flags;
322
323         if (bcom_queue_full(priv->tx_dmatsk)) {
324                 if (net_ratelimit())
325                         dev_err(&dev->dev, "transmit queue overrun\n");
326                 return NETDEV_TX_BUSY;
327         }
328
329         spin_lock_irqsave(&priv->lock, flags);
330
331         bd = (struct bcom_fec_bd *)
332                 bcom_prepare_next_buffer(priv->tx_dmatsk);
333
334         bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
335         bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
336                                     DMA_TO_DEVICE);
337
338         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
339         spin_unlock_irqrestore(&priv->lock, flags);
340
341         if (bcom_queue_full(priv->tx_dmatsk)) {
342                 netif_stop_queue(dev);
343         }
344
345         return NETDEV_TX_OK;
346 }
347
348 #ifdef CONFIG_NET_POLL_CONTROLLER
349 static void mpc52xx_fec_poll_controller(struct net_device *dev)
350 {
351         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
352
353         disable_irq(priv->t_irq);
354         mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
355         enable_irq(priv->t_irq);
356         disable_irq(priv->r_irq);
357         mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
358         enable_irq(priv->r_irq);
359 }
360 #endif
361
362
363 /* This handles BestComm transmit task interrupts
364  */
365 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
366 {
367         struct net_device *dev = dev_id;
368         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
369         unsigned long flags;
370
371         spin_lock_irqsave(&priv->lock, flags);
372         while (bcom_buffer_done(priv->tx_dmatsk)) {
373                 struct sk_buff *skb;
374                 struct bcom_fec_bd *bd;
375                 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
376                                 (struct bcom_bd **)&bd);
377                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
378                                  DMA_TO_DEVICE);
379
380                 dev_kfree_skb_irq(skb);
381         }
382         spin_unlock_irqrestore(&priv->lock, flags);
383
384         netif_wake_queue(dev);
385
386         return IRQ_HANDLED;
387 }
388
389 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
390 {
391         struct net_device *dev = dev_id;
392         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
393         struct sk_buff *rskb; /* received sk_buff */
394         struct sk_buff *skb;  /* new sk_buff to enqueue in its place */
395         struct bcom_fec_bd *bd;
396         u32 status, physaddr;
397         int length;
398         unsigned long flags;
399
400         spin_lock_irqsave(&priv->lock, flags);
401
402         while (bcom_buffer_done(priv->rx_dmatsk)) {
403
404                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
405                                             (struct bcom_bd **)&bd);
406                 physaddr = bd->skb_pa;
407
408                 /* Test for errors in received frame */
409                 if (status & BCOM_FEC_RX_BD_ERRORS) {
410                         /* Drop packet and reuse the buffer */
411                         mpc52xx_fec_rx_submit(dev, rskb);
412                         dev->stats.rx_dropped++;
413                         continue;
414                 }
415
416                 /* skbs are allocated on open, so now we allocate a new one,
417                  * and remove the old (with the packet) */
418                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
419                 if (!skb) {
420                         /* Can't get a new one : reuse the same & drop pkt */
421                         dev_notice(&dev->dev, "Low memory - dropped packet.\n");
422                         mpc52xx_fec_rx_submit(dev, rskb);
423                         dev->stats.rx_dropped++;
424                         continue;
425                 }
426
427                 /* Enqueue the new sk_buff back on the hardware */
428                 mpc52xx_fec_rx_submit(dev, skb);
429
430                 /* Process the received skb - Drop the spin lock while
431                  * calling into the network stack */
432                 spin_unlock_irqrestore(&priv->lock, flags);
433
434                 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
435                                  DMA_FROM_DEVICE);
436                 length = status & BCOM_FEC_RX_BD_LEN_MASK;
437                 skb_put(rskb, length - 4);      /* length without CRC32 */
438                 rskb->protocol = eth_type_trans(rskb, dev);
439                 netif_rx(rskb);
440
441                 spin_lock_irqsave(&priv->lock, flags);
442         }
443
444         spin_unlock_irqrestore(&priv->lock, flags);
445
446         return IRQ_HANDLED;
447 }
448
449 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
450 {
451         struct net_device *dev = dev_id;
452         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
453         struct mpc52xx_fec __iomem *fec = priv->fec;
454         u32 ievent;
455         unsigned long flags;
456
457         ievent = in_be32(&fec->ievent);
458
459         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
460         if (!ievent)
461                 return IRQ_NONE;
462
463         out_be32(&fec->ievent, ievent);         /* clear pending events */
464
465         /* on fifo error, soft-reset fec */
466         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
467
468                 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
469                         dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
470                 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
471                         dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
472
473                 spin_lock_irqsave(&priv->lock, flags);
474                 mpc52xx_fec_reset(dev);
475                 spin_unlock_irqrestore(&priv->lock, flags);
476
477                 return IRQ_HANDLED;
478         }
479
480         if (ievent & ~FEC_IEVENT_TFINT)
481                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
482
483         return IRQ_HANDLED;
484 }
485
486 /*
487  * Get the current statistics.
488  * This may be called with the card open or closed.
489  */
490 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
491 {
492         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
493         struct net_device_stats *stats = &dev->stats;
494         struct mpc52xx_fec __iomem *fec = priv->fec;
495
496         stats->rx_bytes = in_be32(&fec->rmon_r_octets);
497         stats->rx_packets = in_be32(&fec->rmon_r_packets);
498         stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
499                 in_be32(&fec->rmon_r_undersize) +
500                 in_be32(&fec->rmon_r_oversize) +
501                 in_be32(&fec->rmon_r_frag) +
502                 in_be32(&fec->rmon_r_jab);
503
504         stats->tx_bytes = in_be32(&fec->rmon_t_octets);
505         stats->tx_packets = in_be32(&fec->rmon_t_packets);
506         stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
507                 in_be32(&fec->rmon_t_undersize) +
508                 in_be32(&fec->rmon_t_oversize) +
509                 in_be32(&fec->rmon_t_frag) +
510                 in_be32(&fec->rmon_t_jab);
511
512         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
513         stats->collisions = in_be32(&fec->rmon_t_col);
514
515         /* detailed rx_errors: */
516         stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
517                                         + in_be32(&fec->rmon_r_oversize)
518                                         + in_be32(&fec->rmon_r_frag)
519                                         + in_be32(&fec->rmon_r_jab);
520         stats->rx_over_errors = in_be32(&fec->r_macerr);
521         stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
522         stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
523         stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
524         stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
525
526         /* detailed tx_errors: */
527         stats->tx_aborted_errors = 0;
528         stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
529         stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
530         stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
531         stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
532
533         return stats;
534 }
535
536 /*
537  * Read MIB counters in order to reset them,
538  * then zero all the stats fields in memory
539  */
540 static void mpc52xx_fec_reset_stats(struct net_device *dev)
541 {
542         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
543         struct mpc52xx_fec __iomem *fec = priv->fec;
544
545         out_be32(&fec->mib_control, FEC_MIB_DISABLE);
546         memset_io(&fec->rmon_t_drop, 0,
547                    offsetof(struct mpc52xx_fec, reserved10) -
548                    offsetof(struct mpc52xx_fec, rmon_t_drop));
549         out_be32(&fec->mib_control, 0);
550
551         memset(&dev->stats, 0, sizeof(dev->stats));
552 }
553
554 /*
555  * Set or clear the multicast filter for this adaptor.
556  */
557 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
558 {
559         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
560         struct mpc52xx_fec __iomem *fec = priv->fec;
561         u32 rx_control;
562
563         rx_control = in_be32(&fec->r_cntrl);
564
565         if (dev->flags & IFF_PROMISC) {
566                 rx_control |= FEC_RCNTRL_PROM;
567                 out_be32(&fec->r_cntrl, rx_control);
568         } else {
569                 rx_control &= ~FEC_RCNTRL_PROM;
570                 out_be32(&fec->r_cntrl, rx_control);
571
572                 if (dev->flags & IFF_ALLMULTI) {
573                         out_be32(&fec->gaddr1, 0xffffffff);
574                         out_be32(&fec->gaddr2, 0xffffffff);
575                 } else {
576                         u32 crc;
577                         struct netdev_hw_addr *ha;
578                         u32 gaddr1 = 0x00000000;
579                         u32 gaddr2 = 0x00000000;
580
581                         netdev_for_each_mc_addr(ha, dev) {
582                                 crc = ether_crc_le(6, ha->addr) >> 26;
583                                 if (crc >= 32)
584                                         gaddr1 |= 1 << (crc-32);
585                                 else
586                                         gaddr2 |= 1 << crc;
587                         }
588                         out_be32(&fec->gaddr1, gaddr1);
589                         out_be32(&fec->gaddr2, gaddr2);
590                 }
591         }
592 }
593
594 /**
595  * mpc52xx_fec_hw_init
596  * @dev: network device
597  *
598  * Setup various hardware setting, only needed once on start
599  */
600 static void mpc52xx_fec_hw_init(struct net_device *dev)
601 {
602         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
603         struct mpc52xx_fec __iomem *fec = priv->fec;
604         int i;
605
606         /* Whack a reset.  We should wait for this. */
607         out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
608         for (i = 0; i < FEC_RESET_DELAY; ++i) {
609                 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
610                         break;
611                 udelay(1);
612         }
613         if (i == FEC_RESET_DELAY)
614                 dev_err(&dev->dev, "FEC Reset timeout!\n");
615
616         /* set pause to 0x20 frames */
617         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
618
619         /* high service request will be deasserted when there's < 7 bytes in fifo
620          * low service request will be deasserted when there's < 4*7 bytes in fifo
621          */
622         out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
623         out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
624
625         /* alarm when <= x bytes in FIFO */
626         out_be32(&fec->rfifo_alarm, 0x0000030c);
627         out_be32(&fec->tfifo_alarm, 0x00000100);
628
629         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
630         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
631
632         /* enable crc generation */
633         out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
634         out_be32(&fec->iaddr1, 0x00000000);     /* No individual filter */
635         out_be32(&fec->iaddr2, 0x00000000);     /* No individual filter */
636
637         /* set phy speed.
638          * this can't be done in phy driver, since it needs to be called
639          * before fec stuff (even on resume) */
640         out_be32(&fec->mii_speed, priv->mdio_speed);
641 }
642
643 /**
644  * mpc52xx_fec_start
645  * @dev: network device
646  *
647  * This function is called to start or restart the FEC during a link
648  * change.  This happens on fifo errors or when switching between half
649  * and full duplex.
650  */
651 static void mpc52xx_fec_start(struct net_device *dev)
652 {
653         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
654         struct mpc52xx_fec __iomem *fec = priv->fec;
655         u32 rcntrl;
656         u32 tcntrl;
657         u32 tmp;
658
659         /* clear sticky error bits */
660         tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
661         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
662         out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
663
664         /* FIFOs will reset on mpc52xx_fec_enable */
665         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
666
667         /* Set station address. */
668         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
669
670         mpc52xx_fec_set_multicast_list(dev);
671
672         /* set max frame len, enable flow control, select mii mode */
673         rcntrl = FEC_RX_BUFFER_SIZE << 16;      /* max frame length */
674         rcntrl |= FEC_RCNTRL_FCE;
675
676         if (!priv->seven_wire_mode)
677                 rcntrl |= FEC_RCNTRL_MII_MODE;
678
679         if (priv->duplex == DUPLEX_FULL)
680                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
681         else {
682                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
683                 tcntrl = 0;
684         }
685         out_be32(&fec->r_cntrl, rcntrl);
686         out_be32(&fec->x_cntrl, tcntrl);
687
688         /* Clear any outstanding interrupt. */
689         out_be32(&fec->ievent, 0xffffffff);
690
691         /* Enable interrupts we wish to service. */
692         out_be32(&fec->imask, FEC_IMASK_ENABLE);
693
694         /* And last, enable the transmit and receive processing. */
695         out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
696         out_be32(&fec->r_des_active, 0x01000000);
697 }
698
699 /**
700  * mpc52xx_fec_stop
701  * @dev: network device
702  *
703  * stop all activity on fec and empty dma buffers
704  */
705 static void mpc52xx_fec_stop(struct net_device *dev)
706 {
707         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
708         struct mpc52xx_fec __iomem *fec = priv->fec;
709         unsigned long timeout;
710
711         /* disable all interrupts */
712         out_be32(&fec->imask, 0);
713
714         /* Disable the rx task. */
715         bcom_disable(priv->rx_dmatsk);
716
717         /* Wait for tx queue to drain, but only if we're in process context */
718         if (!in_interrupt()) {
719                 timeout = jiffies + msecs_to_jiffies(2000);
720                 while (time_before(jiffies, timeout) &&
721                                 !bcom_queue_empty(priv->tx_dmatsk))
722                         msleep(100);
723
724                 if (time_after_eq(jiffies, timeout))
725                         dev_err(&dev->dev, "queues didn't drain\n");
726 #if 1
727                 if (time_after_eq(jiffies, timeout)) {
728                         dev_err(&dev->dev, "  tx: index: %i, outdex: %i\n",
729                                         priv->tx_dmatsk->index,
730                                         priv->tx_dmatsk->outdex);
731                         dev_err(&dev->dev, "  rx: index: %i, outdex: %i\n",
732                                         priv->rx_dmatsk->index,
733                                         priv->rx_dmatsk->outdex);
734                 }
735 #endif
736         }
737
738         bcom_disable(priv->tx_dmatsk);
739
740         /* Stop FEC */
741         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
742 }
743
744 /* reset fec and bestcomm tasks */
745 static void mpc52xx_fec_reset(struct net_device *dev)
746 {
747         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
748         struct mpc52xx_fec __iomem *fec = priv->fec;
749
750         mpc52xx_fec_stop(dev);
751
752         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
753         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
754
755         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
756
757         mpc52xx_fec_hw_init(dev);
758
759         bcom_fec_rx_reset(priv->rx_dmatsk);
760         bcom_fec_tx_reset(priv->tx_dmatsk);
761
762         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
763
764         bcom_enable(priv->rx_dmatsk);
765         bcom_enable(priv->tx_dmatsk);
766
767         mpc52xx_fec_start(dev);
768
769         netif_wake_queue(dev);
770 }
771
772
773 /* ethtool interface */
774 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
775                 struct ethtool_drvinfo *info)
776 {
777         strcpy(info->driver, DRIVER_NAME);
778 }
779
780 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
781 {
782         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
783
784         if (!priv->phydev)
785                 return -ENODEV;
786
787         return phy_ethtool_gset(priv->phydev, cmd);
788 }
789
790 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
791 {
792         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
793
794         if (!priv->phydev)
795                 return -ENODEV;
796
797         return phy_ethtool_sset(priv->phydev, cmd);
798 }
799
800 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
801 {
802         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
803         return priv->msg_enable;
804 }
805
806 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
807 {
808         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
809         priv->msg_enable = level;
810 }
811
812 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
813         .get_drvinfo = mpc52xx_fec_get_drvinfo,
814         .get_settings = mpc52xx_fec_get_settings,
815         .set_settings = mpc52xx_fec_set_settings,
816         .get_link = ethtool_op_get_link,
817         .get_msglevel = mpc52xx_fec_get_msglevel,
818         .set_msglevel = mpc52xx_fec_set_msglevel,
819 };
820
821
822 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
823 {
824         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
825
826         if (!priv->phydev)
827                 return -ENOTSUPP;
828
829         return phy_mii_ioctl(priv->phydev, rq, cmd);
830 }
831
832 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
833         .ndo_open = mpc52xx_fec_open,
834         .ndo_stop = mpc52xx_fec_close,
835         .ndo_start_xmit = mpc52xx_fec_start_xmit,
836         .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
837         .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
838         .ndo_validate_addr = eth_validate_addr,
839         .ndo_do_ioctl = mpc52xx_fec_ioctl,
840         .ndo_change_mtu = eth_change_mtu,
841         .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
842         .ndo_get_stats = mpc52xx_fec_get_stats,
843 #ifdef CONFIG_NET_POLL_CONTROLLER
844         .ndo_poll_controller = mpc52xx_fec_poll_controller,
845 #endif
846 };
847
848 /* ======================================================================== */
849 /* OF Driver                                                                */
850 /* ======================================================================== */
851
852 static int __devinit
853 mpc52xx_fec_probe(struct platform_device *op, const struct of_device_id *match)
854 {
855         int rv;
856         struct net_device *ndev;
857         struct mpc52xx_fec_priv *priv = NULL;
858         struct resource mem;
859         const u32 *prop;
860         int prop_size;
861
862         phys_addr_t rx_fifo;
863         phys_addr_t tx_fifo;
864
865         /* Get the ether ndev & it's private zone */
866         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
867         if (!ndev)
868                 return -ENOMEM;
869
870         priv = netdev_priv(ndev);
871         priv->ndev = ndev;
872
873         /* Reserve FEC control zone */
874         rv = of_address_to_resource(op->dev.of_node, 0, &mem);
875         if (rv) {
876                 printk(KERN_ERR DRIVER_NAME ": "
877                                 "Error while parsing device node resource\n" );
878                 goto err_netdev;
879         }
880         if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
881                 printk(KERN_ERR DRIVER_NAME
882                         " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
883                         (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
884                 rv = -EINVAL;
885                 goto err_netdev;
886         }
887
888         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),
889                                 DRIVER_NAME)) {
890                 rv = -EBUSY;
891                 goto err_netdev;
892         }
893
894         /* Init ether ndev with what we have */
895         ndev->netdev_ops        = &mpc52xx_fec_netdev_ops;
896         ndev->ethtool_ops       = &mpc52xx_fec_ethtool_ops;
897         ndev->watchdog_timeo    = FEC_WATCHDOG_TIMEOUT;
898         ndev->base_addr         = mem.start;
899         SET_NETDEV_DEV(ndev, &op->dev);
900
901         spin_lock_init(&priv->lock);
902
903         /* ioremap the zones */
904         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
905
906         if (!priv->fec) {
907                 rv = -ENOMEM;
908                 goto err_mem_region;
909         }
910
911         /* Bestcomm init */
912         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
913         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
914
915         priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
916         priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
917
918         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
919                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
920                 rv = -ENOMEM;
921                 goto err_rx_tx_dmatsk;
922         }
923
924         /* Get the IRQ we need one by one */
925                 /* Control */
926         ndev->irq = irq_of_parse_and_map(op->dev.of_node, 0);
927
928                 /* RX */
929         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
930
931                 /* TX */
932         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
933
934         /* MAC address init */
935         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
936                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
937         else
938                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
939
940         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
941
942         /*
943          * Link mode configuration
944          */
945
946         /* Start with safe defaults for link connection */
947         priv->speed = 100;
948         priv->duplex = DUPLEX_HALF;
949         priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->dev.of_node) >> 20) / 5) << 1;
950
951         /* The current speed preconfigures the speed of the MII link */
952         prop = of_get_property(op->dev.of_node, "current-speed", &prop_size);
953         if (prop && (prop_size >= sizeof(u32) * 2)) {
954                 priv->speed = prop[0];
955                 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
956         }
957
958         /* If there is a phy handle, then get the PHY node */
959         priv->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0);
960
961         /* the 7-wire property means don't use MII mode */
962         if (of_find_property(op->dev.of_node, "fsl,7-wire-mode", NULL)) {
963                 priv->seven_wire_mode = 1;
964                 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
965         }
966
967         /* Hardware init */
968         mpc52xx_fec_hw_init(ndev);
969         mpc52xx_fec_reset_stats(ndev);
970
971         rv = register_netdev(ndev);
972         if (rv < 0)
973                 goto err_node;
974
975         /* We're done ! */
976         dev_set_drvdata(&op->dev, ndev);
977
978         return 0;
979
980 err_node:
981         of_node_put(priv->phy_node);
982         irq_dispose_mapping(ndev->irq);
983 err_rx_tx_dmatsk:
984         if (priv->rx_dmatsk)
985                 bcom_fec_rx_release(priv->rx_dmatsk);
986         if (priv->tx_dmatsk)
987                 bcom_fec_tx_release(priv->tx_dmatsk);
988         iounmap(priv->fec);
989 err_mem_region:
990         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
991 err_netdev:
992         free_netdev(ndev);
993
994         return rv;
995 }
996
997 static int
998 mpc52xx_fec_remove(struct platform_device *op)
999 {
1000         struct net_device *ndev;
1001         struct mpc52xx_fec_priv *priv;
1002
1003         ndev = dev_get_drvdata(&op->dev);
1004         priv = netdev_priv(ndev);
1005
1006         unregister_netdev(ndev);
1007
1008         if (priv->phy_node)
1009                 of_node_put(priv->phy_node);
1010         priv->phy_node = NULL;
1011
1012         irq_dispose_mapping(ndev->irq);
1013
1014         bcom_fec_rx_release(priv->rx_dmatsk);
1015         bcom_fec_tx_release(priv->tx_dmatsk);
1016
1017         iounmap(priv->fec);
1018
1019         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1020
1021         free_netdev(ndev);
1022
1023         dev_set_drvdata(&op->dev, NULL);
1024         return 0;
1025 }
1026
1027 #ifdef CONFIG_PM
1028 static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)
1029 {
1030         struct net_device *dev = dev_get_drvdata(&op->dev);
1031
1032         if (netif_running(dev))
1033                 mpc52xx_fec_close(dev);
1034
1035         return 0;
1036 }
1037
1038 static int mpc52xx_fec_of_resume(struct platform_device *op)
1039 {
1040         struct net_device *dev = dev_get_drvdata(&op->dev);
1041
1042         mpc52xx_fec_hw_init(dev);
1043         mpc52xx_fec_reset_stats(dev);
1044
1045         if (netif_running(dev))
1046                 mpc52xx_fec_open(dev);
1047
1048         return 0;
1049 }
1050 #endif
1051
1052 static struct of_device_id mpc52xx_fec_match[] = {
1053         { .compatible = "fsl,mpc5200b-fec", },
1054         { .compatible = "fsl,mpc5200-fec", },
1055         { .compatible = "mpc5200-fec", },
1056         { }
1057 };
1058
1059 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1060
1061 static struct of_platform_driver mpc52xx_fec_driver = {
1062         .driver = {
1063                 .name = DRIVER_NAME,
1064                 .owner = THIS_MODULE,
1065                 .of_match_table = mpc52xx_fec_match,
1066         },
1067         .probe          = mpc52xx_fec_probe,
1068         .remove         = mpc52xx_fec_remove,
1069 #ifdef CONFIG_PM
1070         .suspend        = mpc52xx_fec_of_suspend,
1071         .resume         = mpc52xx_fec_of_resume,
1072 #endif
1073 };
1074
1075
1076 /* ======================================================================== */
1077 /* Module                                                                   */
1078 /* ======================================================================== */
1079
1080 static int __init
1081 mpc52xx_fec_init(void)
1082 {
1083 #ifdef CONFIG_FEC_MPC52xx_MDIO
1084         int ret;
1085         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1086         if (ret) {
1087                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1088                 return ret;
1089         }
1090 #endif
1091         return of_register_platform_driver(&mpc52xx_fec_driver);
1092 }
1093
1094 static void __exit
1095 mpc52xx_fec_exit(void)
1096 {
1097         of_unregister_platform_driver(&mpc52xx_fec_driver);
1098 #ifdef CONFIG_FEC_MPC52xx_MDIO
1099         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1100 #endif
1101 }
1102
1103
1104 module_init(mpc52xx_fec_init);
1105 module_exit(mpc52xx_fec_exit);
1106
1107 MODULE_LICENSE("GPL");
1108 MODULE_AUTHOR("Dale Farnsworth");
1109 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");