drivers/net: Kill now superfluous ->last_rx stores.
[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/errno.h>
23 #include <linux/init.h>
24 #include <linux/crc32.h>
25 #include <linux/hardirq.h>
26 #include <linux/delay.h>
27 #include <linux/of_device.h>
28 #include <linux/of_platform.h>
29
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/ethtool.h>
33 #include <linux/skbuff.h>
34
35 #include <asm/io.h>
36 #include <asm/delay.h>
37 #include <asm/mpc52xx.h>
38
39 #include <sysdev/bestcomm/bestcomm.h>
40 #include <sysdev/bestcomm/fec.h>
41
42 #include "fec_mpc52xx.h"
43
44 #define DRIVER_NAME "mpc52xx-fec"
45
46 #define FEC5200_PHYADDR_NONE    (-1)
47 #define FEC5200_PHYADDR_7WIRE   (-2)
48
49 /* Private driver data structure */
50 struct mpc52xx_fec_priv {
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         int phy_addr;
63         unsigned int phy_speed;
64         struct phy_device *phydev;
65         enum phy_state link;
66 };
67
68
69 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
70 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
71 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
72 static void mpc52xx_fec_stop(struct net_device *dev);
73 static void mpc52xx_fec_start(struct net_device *dev);
74 static void mpc52xx_fec_reset(struct net_device *dev);
75
76 static u8 mpc52xx_fec_mac_addr[6];
77 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
78 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
79
80 #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
81                 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
82 static int debug = -1;  /* the above default */
83 module_param(debug, int, 0);
84 MODULE_PARM_DESC(debug, "debugging messages level");
85
86 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
87 {
88         dev_warn(&dev->dev, "transmit timed out\n");
89
90         mpc52xx_fec_reset(dev);
91
92         dev->stats.tx_errors++;
93
94         netif_wake_queue(dev);
95 }
96
97 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
98 {
99         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
100         struct mpc52xx_fec __iomem *fec = priv->fec;
101
102         out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
103         out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
104 }
105
106 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
107 {
108         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
109         struct mpc52xx_fec __iomem *fec = priv->fec;
110
111         *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
112         *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
113 }
114
115 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
116 {
117         struct sockaddr *sock = addr;
118
119         memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
120
121         mpc52xx_fec_set_paddr(dev, sock->sa_data);
122         return 0;
123 }
124
125 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
126 {
127         while (!bcom_queue_empty(s)) {
128                 struct bcom_fec_bd *bd;
129                 struct sk_buff *skb;
130
131                 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
132                 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
133                 kfree_skb(skb);
134         }
135 }
136
137 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
138 {
139         while (!bcom_queue_full(rxtsk)) {
140                 struct sk_buff *skb;
141                 struct bcom_fec_bd *bd;
142
143                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
144                 if (skb == NULL)
145                         return -EAGAIN;
146
147                 /* zero out the initial receive buffers to aid debugging */
148                 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
149
150                 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
151
152                 bd->status = FEC_RX_BUFFER_SIZE;
153                 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
154                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
155
156                 bcom_submit_next_buffer(rxtsk, skb);
157         }
158
159         return 0;
160 }
161
162 /* based on generic_adjust_link from fs_enet-main.c */
163 static void mpc52xx_fec_adjust_link(struct net_device *dev)
164 {
165         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
166         struct phy_device *phydev = priv->phydev;
167         int new_state = 0;
168
169         if (phydev->link != PHY_DOWN) {
170                 if (phydev->duplex != priv->duplex) {
171                         struct mpc52xx_fec __iomem *fec = priv->fec;
172                         u32 rcntrl;
173                         u32 tcntrl;
174
175                         new_state = 1;
176                         priv->duplex = phydev->duplex;
177
178                         rcntrl = in_be32(&fec->r_cntrl);
179                         tcntrl = in_be32(&fec->x_cntrl);
180
181                         rcntrl &= ~FEC_RCNTRL_DRT;
182                         tcntrl &= ~FEC_TCNTRL_FDEN;
183                         if (phydev->duplex == DUPLEX_FULL)
184                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
185                         else
186                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
187
188                         out_be32(&fec->r_cntrl, rcntrl);
189                         out_be32(&fec->x_cntrl, tcntrl);
190                 }
191
192                 if (phydev->speed != priv->speed) {
193                         new_state = 1;
194                         priv->speed = phydev->speed;
195                 }
196
197                 if (priv->link == PHY_DOWN) {
198                         new_state = 1;
199                         priv->link = phydev->link;
200                 }
201
202         } else if (priv->link) {
203                 new_state = 1;
204                 priv->link = PHY_DOWN;
205                 priv->speed = 0;
206                 priv->duplex = -1;
207         }
208
209         if (new_state && netif_msg_link(priv))
210                 phy_print_status(phydev);
211 }
212
213 static int mpc52xx_fec_init_phy(struct net_device *dev)
214 {
215         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
216         struct phy_device *phydev;
217         char phy_id[BUS_ID_SIZE];
218
219         snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
220                         (unsigned int)dev->base_addr, priv->phy_addr);
221
222         priv->link = PHY_DOWN;
223         priv->speed = 0;
224         priv->duplex = -1;
225
226         phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
227         if (IS_ERR(phydev)) {
228                 dev_err(&dev->dev, "phy_connect failed\n");
229                 return PTR_ERR(phydev);
230         }
231         dev_info(&dev->dev, "attached phy %i to driver %s\n",
232                         phydev->addr, phydev->drv->name);
233
234         priv->phydev = phydev;
235
236         return 0;
237 }
238
239 static int mpc52xx_fec_phy_start(struct net_device *dev)
240 {
241         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
242         int err;
243
244         if (priv->phy_addr < 0)
245                 return 0;
246
247         err = mpc52xx_fec_init_phy(dev);
248         if (err) {
249                 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
250                 return err;
251         }
252
253         /* reset phy - this also wakes it from PDOWN */
254         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
255         phy_start(priv->phydev);
256
257         return 0;
258 }
259
260 static void mpc52xx_fec_phy_stop(struct net_device *dev)
261 {
262         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
263
264         if (!priv->phydev)
265                 return;
266
267         phy_disconnect(priv->phydev);
268         /* power down phy */
269         phy_stop(priv->phydev);
270         phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
271 }
272
273 static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
274                 struct mii_ioctl_data *mii_data, int cmd)
275 {
276         if (!priv->phydev)
277                 return -ENOTSUPP;
278
279         return phy_mii_ioctl(priv->phydev, mii_data, cmd);
280 }
281
282 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
283 {
284         struct mpc52xx_fec __iomem *fec = priv->fec;
285
286         if (priv->phydev)
287                 return;
288
289         out_be32(&fec->mii_speed, priv->phy_speed);
290 }
291
292 static int mpc52xx_fec_open(struct net_device *dev)
293 {
294         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
295         int err = -EBUSY;
296
297         if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
298                         DRIVER_NAME "_ctrl", dev)) {
299                 dev_err(&dev->dev, "ctrl interrupt request failed\n");
300                 goto out;
301         }
302         if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
303                         DRIVER_NAME "_rx", dev)) {
304                 dev_err(&dev->dev, "rx interrupt request failed\n");
305                 goto free_ctrl_irq;
306         }
307         if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
308                         DRIVER_NAME "_tx", dev)) {
309                 dev_err(&dev->dev, "tx interrupt request failed\n");
310                 goto free_2irqs;
311         }
312
313         bcom_fec_rx_reset(priv->rx_dmatsk);
314         bcom_fec_tx_reset(priv->tx_dmatsk);
315
316         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
317         if (err) {
318                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
319                 goto free_irqs;
320         }
321
322         err = mpc52xx_fec_phy_start(dev);
323         if (err)
324                 goto free_skbs;
325
326         bcom_enable(priv->rx_dmatsk);
327         bcom_enable(priv->tx_dmatsk);
328
329         mpc52xx_fec_start(dev);
330
331         netif_start_queue(dev);
332
333         return 0;
334
335  free_skbs:
336         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
337
338  free_irqs:
339         free_irq(priv->t_irq, dev);
340  free_2irqs:
341         free_irq(priv->r_irq, dev);
342  free_ctrl_irq:
343         free_irq(dev->irq, dev);
344  out:
345
346         return err;
347 }
348
349 static int mpc52xx_fec_close(struct net_device *dev)
350 {
351         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
352
353         netif_stop_queue(dev);
354
355         mpc52xx_fec_stop(dev);
356
357         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
358
359         free_irq(dev->irq, dev);
360         free_irq(priv->r_irq, dev);
361         free_irq(priv->t_irq, dev);
362
363         mpc52xx_fec_phy_stop(dev);
364
365         return 0;
366 }
367
368 /* This will only be invoked if your driver is _not_ in XOFF state.
369  * What this means is that you need not check it, and that this
370  * invariant will hold if you make sure that the netif_*_queue()
371  * calls are done at the proper times.
372  */
373 static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
374 {
375         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
376         struct bcom_fec_bd *bd;
377
378         if (bcom_queue_full(priv->tx_dmatsk)) {
379                 if (net_ratelimit())
380                         dev_err(&dev->dev, "transmit queue overrun\n");
381                 return 1;
382         }
383
384         spin_lock_irq(&priv->lock);
385         dev->trans_start = jiffies;
386
387         bd = (struct bcom_fec_bd *)
388                 bcom_prepare_next_buffer(priv->tx_dmatsk);
389
390         bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
391         bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
392
393         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
394
395         if (bcom_queue_full(priv->tx_dmatsk)) {
396                 netif_stop_queue(dev);
397         }
398
399         spin_unlock_irq(&priv->lock);
400
401         return 0;
402 }
403
404 #ifdef CONFIG_NET_POLL_CONTROLLER
405 static void mpc52xx_fec_poll_controller(struct net_device *dev)
406 {
407         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
408
409         disable_irq(priv->t_irq);
410         mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
411         enable_irq(priv->t_irq);
412         disable_irq(priv->r_irq);
413         mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
414         enable_irq(priv->r_irq);
415 }
416 #endif
417
418
419 /* This handles BestComm transmit task interrupts
420  */
421 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
422 {
423         struct net_device *dev = dev_id;
424         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
425
426         spin_lock(&priv->lock);
427
428         while (bcom_buffer_done(priv->tx_dmatsk)) {
429                 struct sk_buff *skb;
430                 struct bcom_fec_bd *bd;
431                 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
432                                 (struct bcom_bd **)&bd);
433                 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
434
435                 dev_kfree_skb_irq(skb);
436         }
437
438         netif_wake_queue(dev);
439
440         spin_unlock(&priv->lock);
441
442         return IRQ_HANDLED;
443 }
444
445 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
446 {
447         struct net_device *dev = dev_id;
448         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
449
450         while (bcom_buffer_done(priv->rx_dmatsk)) {
451                 struct sk_buff *skb;
452                 struct sk_buff *rskb;
453                 struct bcom_fec_bd *bd;
454                 u32 status;
455
456                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
457                                 (struct bcom_bd **)&bd);
458                 dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
459
460                 /* Test for errors in received frame */
461                 if (status & BCOM_FEC_RX_BD_ERRORS) {
462                         /* Drop packet and reuse the buffer */
463                         bd = (struct bcom_fec_bd *)
464                                 bcom_prepare_next_buffer(priv->rx_dmatsk);
465
466                         bd->status = FEC_RX_BUFFER_SIZE;
467                         bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
468                                         FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
469
470                         bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
471
472                         dev->stats.rx_dropped++;
473
474                         continue;
475                 }
476
477                 /* skbs are allocated on open, so now we allocate a new one,
478                  * and remove the old (with the packet) */
479                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
480                 if (skb) {
481                         /* Process the received skb */
482                         int length = status & BCOM_FEC_RX_BD_LEN_MASK;
483
484                         skb_put(rskb, length - 4);      /* length without CRC32 */
485
486                         rskb->dev = dev;
487                         rskb->protocol = eth_type_trans(rskb, dev);
488
489                         netif_rx(rskb);
490                 } else {
491                         /* Can't get a new one : reuse the same & drop pkt */
492                         dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
493                         dev->stats.rx_dropped++;
494
495                         skb = rskb;
496                 }
497
498                 bd = (struct bcom_fec_bd *)
499                         bcom_prepare_next_buffer(priv->rx_dmatsk);
500
501                 bd->status = FEC_RX_BUFFER_SIZE;
502                 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
503                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
504
505                 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
506         }
507
508         return IRQ_HANDLED;
509 }
510
511 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
512 {
513         struct net_device *dev = dev_id;
514         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
515         struct mpc52xx_fec __iomem *fec = priv->fec;
516         u32 ievent;
517
518         ievent = in_be32(&fec->ievent);
519
520         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
521         if (!ievent)
522                 return IRQ_NONE;
523
524         out_be32(&fec->ievent, ievent);         /* clear pending events */
525
526         /* on fifo error, soft-reset fec */
527         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
528
529                 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
530                         dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
531                 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
532                         dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
533
534                 mpc52xx_fec_reset(dev);
535
536                 netif_wake_queue(dev);
537                 return IRQ_HANDLED;
538         }
539
540         if (ievent & ~FEC_IEVENT_TFINT)
541                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
542
543         return IRQ_HANDLED;
544 }
545
546 /*
547  * Get the current statistics.
548  * This may be called with the card open or closed.
549  */
550 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
551 {
552         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
553         struct net_device_stats *stats = &dev->stats;
554         struct mpc52xx_fec __iomem *fec = priv->fec;
555
556         stats->rx_bytes = in_be32(&fec->rmon_r_octets);
557         stats->rx_packets = in_be32(&fec->rmon_r_packets);
558         stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
559                 in_be32(&fec->rmon_r_undersize) +
560                 in_be32(&fec->rmon_r_oversize) +
561                 in_be32(&fec->rmon_r_frag) +
562                 in_be32(&fec->rmon_r_jab);
563
564         stats->tx_bytes = in_be32(&fec->rmon_t_octets);
565         stats->tx_packets = in_be32(&fec->rmon_t_packets);
566         stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
567                 in_be32(&fec->rmon_t_undersize) +
568                 in_be32(&fec->rmon_t_oversize) +
569                 in_be32(&fec->rmon_t_frag) +
570                 in_be32(&fec->rmon_t_jab);
571
572         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
573         stats->collisions = in_be32(&fec->rmon_t_col);
574
575         /* detailed rx_errors: */
576         stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
577                                         + in_be32(&fec->rmon_r_oversize)
578                                         + in_be32(&fec->rmon_r_frag)
579                                         + in_be32(&fec->rmon_r_jab);
580         stats->rx_over_errors = in_be32(&fec->r_macerr);
581         stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
582         stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
583         stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
584         stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
585
586         /* detailed tx_errors: */
587         stats->tx_aborted_errors = 0;
588         stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
589         stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
590         stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
591         stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
592
593         return stats;
594 }
595
596 /*
597  * Read MIB counters in order to reset them,
598  * then zero all the stats fields in memory
599  */
600 static void mpc52xx_fec_reset_stats(struct net_device *dev)
601 {
602         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
603         struct mpc52xx_fec __iomem *fec = priv->fec;
604
605         out_be32(&fec->mib_control, FEC_MIB_DISABLE);
606         memset_io(&fec->rmon_t_drop, 0,
607                    offsetof(struct mpc52xx_fec, reserved10) -
608                    offsetof(struct mpc52xx_fec, rmon_t_drop));
609         out_be32(&fec->mib_control, 0);
610
611         memset(&dev->stats, 0, sizeof(dev->stats));
612 }
613
614 /*
615  * Set or clear the multicast filter for this adaptor.
616  */
617 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
618 {
619         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
620         struct mpc52xx_fec __iomem *fec = priv->fec;
621         u32 rx_control;
622
623         rx_control = in_be32(&fec->r_cntrl);
624
625         if (dev->flags & IFF_PROMISC) {
626                 rx_control |= FEC_RCNTRL_PROM;
627                 out_be32(&fec->r_cntrl, rx_control);
628         } else {
629                 rx_control &= ~FEC_RCNTRL_PROM;
630                 out_be32(&fec->r_cntrl, rx_control);
631
632                 if (dev->flags & IFF_ALLMULTI) {
633                         out_be32(&fec->gaddr1, 0xffffffff);
634                         out_be32(&fec->gaddr2, 0xffffffff);
635                 } else {
636                         u32 crc;
637                         int i;
638                         struct dev_mc_list *dmi;
639                         u32 gaddr1 = 0x00000000;
640                         u32 gaddr2 = 0x00000000;
641
642                         dmi = dev->mc_list;
643                         for (i=0; i<dev->mc_count; i++) {
644                                 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
645                                 if (crc >= 32)
646                                         gaddr1 |= 1 << (crc-32);
647                                 else
648                                         gaddr2 |= 1 << crc;
649                                 dmi = dmi->next;
650                         }
651                         out_be32(&fec->gaddr1, gaddr1);
652                         out_be32(&fec->gaddr2, gaddr2);
653                 }
654         }
655 }
656
657 /**
658  * mpc52xx_fec_hw_init
659  * @dev: network device
660  *
661  * Setup various hardware setting, only needed once on start
662  */
663 static void mpc52xx_fec_hw_init(struct net_device *dev)
664 {
665         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
666         struct mpc52xx_fec __iomem *fec = priv->fec;
667         int i;
668
669         /* Whack a reset.  We should wait for this. */
670         out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
671         for (i = 0; i < FEC_RESET_DELAY; ++i) {
672                 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
673                         break;
674                 udelay(1);
675         }
676         if (i == FEC_RESET_DELAY)
677                 dev_err(&dev->dev, "FEC Reset timeout!\n");
678
679         /* set pause to 0x20 frames */
680         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
681
682         /* high service request will be deasserted when there's < 7 bytes in fifo
683          * low service request will be deasserted when there's < 4*7 bytes in fifo
684          */
685         out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
686         out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
687
688         /* alarm when <= x bytes in FIFO */
689         out_be32(&fec->rfifo_alarm, 0x0000030c);
690         out_be32(&fec->tfifo_alarm, 0x00000100);
691
692         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
693         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
694
695         /* enable crc generation */
696         out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
697         out_be32(&fec->iaddr1, 0x00000000);     /* No individual filter */
698         out_be32(&fec->iaddr2, 0x00000000);     /* No individual filter */
699
700         /* set phy speed.
701          * this can't be done in phy driver, since it needs to be called
702          * before fec stuff (even on resume) */
703         mpc52xx_fec_phy_hw_init(priv);
704 }
705
706 /**
707  * mpc52xx_fec_start
708  * @dev: network device
709  *
710  * This function is called to start or restart the FEC during a link
711  * change.  This happens on fifo errors or when switching between half
712  * and full duplex.
713  */
714 static void mpc52xx_fec_start(struct net_device *dev)
715 {
716         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
717         struct mpc52xx_fec __iomem *fec = priv->fec;
718         u32 rcntrl;
719         u32 tcntrl;
720         u32 tmp;
721
722         /* clear sticky error bits */
723         tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
724         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
725         out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
726
727         /* FIFOs will reset on mpc52xx_fec_enable */
728         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
729
730         /* Set station address. */
731         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
732
733         mpc52xx_fec_set_multicast_list(dev);
734
735         /* set max frame len, enable flow control, select mii mode */
736         rcntrl = FEC_RX_BUFFER_SIZE << 16;      /* max frame length */
737         rcntrl |= FEC_RCNTRL_FCE;
738
739         if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
740                 rcntrl |= FEC_RCNTRL_MII_MODE;
741
742         if (priv->duplex == DUPLEX_FULL)
743                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
744         else {
745                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
746                 tcntrl = 0;
747         }
748         out_be32(&fec->r_cntrl, rcntrl);
749         out_be32(&fec->x_cntrl, tcntrl);
750
751         /* Clear any outstanding interrupt. */
752         out_be32(&fec->ievent, 0xffffffff);
753
754         /* Enable interrupts we wish to service. */
755         out_be32(&fec->imask, FEC_IMASK_ENABLE);
756
757         /* And last, enable the transmit and receive processing. */
758         out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
759         out_be32(&fec->r_des_active, 0x01000000);
760 }
761
762 /**
763  * mpc52xx_fec_stop
764  * @dev: network device
765  *
766  * stop all activity on fec and empty dma buffers
767  */
768 static void mpc52xx_fec_stop(struct net_device *dev)
769 {
770         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
771         struct mpc52xx_fec __iomem *fec = priv->fec;
772         unsigned long timeout;
773
774         /* disable all interrupts */
775         out_be32(&fec->imask, 0);
776
777         /* Disable the rx task. */
778         bcom_disable(priv->rx_dmatsk);
779
780         /* Wait for tx queue to drain, but only if we're in process context */
781         if (!in_interrupt()) {
782                 timeout = jiffies + msecs_to_jiffies(2000);
783                 while (time_before(jiffies, timeout) &&
784                                 !bcom_queue_empty(priv->tx_dmatsk))
785                         msleep(100);
786
787                 if (time_after_eq(jiffies, timeout))
788                         dev_err(&dev->dev, "queues didn't drain\n");
789 #if 1
790                 if (time_after_eq(jiffies, timeout)) {
791                         dev_err(&dev->dev, "  tx: index: %i, outdex: %i\n",
792                                         priv->tx_dmatsk->index,
793                                         priv->tx_dmatsk->outdex);
794                         dev_err(&dev->dev, "  rx: index: %i, outdex: %i\n",
795                                         priv->rx_dmatsk->index,
796                                         priv->rx_dmatsk->outdex);
797                 }
798 #endif
799         }
800
801         bcom_disable(priv->tx_dmatsk);
802
803         /* Stop FEC */
804         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
805
806         return;
807 }
808
809 /* reset fec and bestcomm tasks */
810 static void mpc52xx_fec_reset(struct net_device *dev)
811 {
812         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
813         struct mpc52xx_fec __iomem *fec = priv->fec;
814
815         mpc52xx_fec_stop(dev);
816
817         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
818         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
819
820         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
821
822         mpc52xx_fec_hw_init(dev);
823
824         phy_stop(priv->phydev);
825         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
826         phy_start(priv->phydev);
827
828         bcom_fec_rx_reset(priv->rx_dmatsk);
829         bcom_fec_tx_reset(priv->tx_dmatsk);
830
831         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
832
833         bcom_enable(priv->rx_dmatsk);
834         bcom_enable(priv->tx_dmatsk);
835
836         mpc52xx_fec_start(dev);
837 }
838
839
840 /* ethtool interface */
841 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
842                 struct ethtool_drvinfo *info)
843 {
844         strcpy(info->driver, DRIVER_NAME);
845 }
846
847 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
848 {
849         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
850         return phy_ethtool_gset(priv->phydev, cmd);
851 }
852
853 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
854 {
855         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
856         return phy_ethtool_sset(priv->phydev, cmd);
857 }
858
859 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
860 {
861         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
862         return priv->msg_enable;
863 }
864
865 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
866 {
867         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
868         priv->msg_enable = level;
869 }
870
871 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
872         .get_drvinfo = mpc52xx_fec_get_drvinfo,
873         .get_settings = mpc52xx_fec_get_settings,
874         .set_settings = mpc52xx_fec_set_settings,
875         .get_link = ethtool_op_get_link,
876         .get_msglevel = mpc52xx_fec_get_msglevel,
877         .set_msglevel = mpc52xx_fec_set_msglevel,
878 };
879
880
881 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
882 {
883         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
884
885         return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
886 }
887
888 /* ======================================================================== */
889 /* OF Driver                                                                */
890 /* ======================================================================== */
891
892 static int __devinit
893 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
894 {
895         int rv;
896         struct net_device *ndev;
897         struct mpc52xx_fec_priv *priv = NULL;
898         struct resource mem;
899         struct device_node *phy_node;
900         const phandle *phy_handle;
901         const u32 *prop;
902         int prop_size;
903
904         phys_addr_t rx_fifo;
905         phys_addr_t tx_fifo;
906
907         /* Get the ether ndev & it's private zone */
908         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
909         if (!ndev)
910                 return -ENOMEM;
911
912         priv = netdev_priv(ndev);
913
914         /* Reserve FEC control zone */
915         rv = of_address_to_resource(op->node, 0, &mem);
916         if (rv) {
917                 printk(KERN_ERR DRIVER_NAME ": "
918                                 "Error while parsing device node resource\n" );
919                 return rv;
920         }
921         if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
922                 printk(KERN_ERR DRIVER_NAME
923                         " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
924                         (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
925                 return -EINVAL;
926         }
927
928         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
929                 return -EBUSY;
930
931         /* Init ether ndev with what we have */
932         ndev->open              = mpc52xx_fec_open;
933         ndev->stop              = mpc52xx_fec_close;
934         ndev->hard_start_xmit   = mpc52xx_fec_hard_start_xmit;
935         ndev->do_ioctl          = mpc52xx_fec_ioctl;
936         ndev->ethtool_ops       = &mpc52xx_fec_ethtool_ops;
937         ndev->get_stats         = mpc52xx_fec_get_stats;
938         ndev->set_mac_address   = mpc52xx_fec_set_mac_address;
939         ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
940         ndev->tx_timeout        = mpc52xx_fec_tx_timeout;
941         ndev->watchdog_timeo    = FEC_WATCHDOG_TIMEOUT;
942         ndev->base_addr         = mem.start;
943 #ifdef CONFIG_NET_POLL_CONTROLLER
944         ndev->poll_controller = mpc52xx_fec_poll_controller;
945 #endif
946
947         priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
948
949         spin_lock_init(&priv->lock);
950
951         /* ioremap the zones */
952         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
953
954         if (!priv->fec) {
955                 rv = -ENOMEM;
956                 goto probe_error;
957         }
958
959         /* Bestcomm init */
960         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
961         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
962
963         priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
964         priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
965
966         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
967                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
968                 rv = -ENOMEM;
969                 goto probe_error;
970         }
971
972         /* Get the IRQ we need one by one */
973                 /* Control */
974         ndev->irq = irq_of_parse_and_map(op->node, 0);
975
976                 /* RX */
977         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
978
979                 /* TX */
980         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
981
982         /* MAC address init */
983         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
984                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
985         else
986                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
987
988         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
989
990         /*
991          * Link mode configuration
992          */
993
994         /* Start with safe defaults for link connection */
995         priv->phy_addr = FEC5200_PHYADDR_NONE;
996         priv->speed = 100;
997         priv->duplex = DUPLEX_HALF;
998         priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
999
1000         /* the 7-wire property means don't use MII mode */
1001         if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
1002                 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
1003
1004         /* The current speed preconfigures the speed of the MII link */
1005         prop = of_get_property(op->node, "current-speed", &prop_size);
1006         if (prop && (prop_size >= sizeof(u32) * 2)) {
1007                 priv->speed = prop[0];
1008                 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
1009         }
1010
1011         /* If there is a phy handle, setup link to that phy */
1012         phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
1013         if (phy_handle && (prop_size >= sizeof(phandle))) {
1014                 phy_node = of_find_node_by_phandle(*phy_handle);
1015                 prop = of_get_property(phy_node, "reg", &prop_size);
1016                 if (prop && (prop_size >= sizeof(u32)))
1017                         if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1018                                 priv->phy_addr = *prop;
1019                 of_node_put(phy_node);
1020         }
1021
1022         /* Hardware init */
1023         mpc52xx_fec_hw_init(ndev);
1024
1025         mpc52xx_fec_reset_stats(ndev);
1026
1027         SET_NETDEV_DEV(ndev, &op->dev);
1028
1029         /* Register the new network device */
1030         rv = register_netdev(ndev);
1031         if (rv < 0)
1032                 goto probe_error;
1033
1034         /* Now report the link setup */
1035         switch (priv->phy_addr) {
1036          case FEC5200_PHYADDR_NONE:
1037                 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1038                          priv->speed, priv->duplex ? 'F' : 'H');
1039                 break;
1040          case FEC5200_PHYADDR_7WIRE:
1041                 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1042                 break;
1043          default:
1044                 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1045                          priv->phy_addr);
1046         }
1047
1048         /* We're done ! */
1049         dev_set_drvdata(&op->dev, ndev);
1050
1051         return 0;
1052
1053
1054         /* Error handling - free everything that might be allocated */
1055 probe_error:
1056
1057         irq_dispose_mapping(ndev->irq);
1058
1059         if (priv->rx_dmatsk)
1060                 bcom_fec_rx_release(priv->rx_dmatsk);
1061         if (priv->tx_dmatsk)
1062                 bcom_fec_tx_release(priv->tx_dmatsk);
1063
1064         if (priv->fec)
1065                 iounmap(priv->fec);
1066
1067         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1068
1069         free_netdev(ndev);
1070
1071         return rv;
1072 }
1073
1074 static int
1075 mpc52xx_fec_remove(struct of_device *op)
1076 {
1077         struct net_device *ndev;
1078         struct mpc52xx_fec_priv *priv;
1079
1080         ndev = dev_get_drvdata(&op->dev);
1081         priv = netdev_priv(ndev);
1082
1083         unregister_netdev(ndev);
1084
1085         irq_dispose_mapping(ndev->irq);
1086
1087         bcom_fec_rx_release(priv->rx_dmatsk);
1088         bcom_fec_tx_release(priv->tx_dmatsk);
1089
1090         iounmap(priv->fec);
1091
1092         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1093
1094         free_netdev(ndev);
1095
1096         dev_set_drvdata(&op->dev, NULL);
1097         return 0;
1098 }
1099
1100 #ifdef CONFIG_PM
1101 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1102 {
1103         struct net_device *dev = dev_get_drvdata(&op->dev);
1104
1105         if (netif_running(dev))
1106                 mpc52xx_fec_close(dev);
1107
1108         return 0;
1109 }
1110
1111 static int mpc52xx_fec_of_resume(struct of_device *op)
1112 {
1113         struct net_device *dev = dev_get_drvdata(&op->dev);
1114
1115         mpc52xx_fec_hw_init(dev);
1116         mpc52xx_fec_reset_stats(dev);
1117
1118         if (netif_running(dev))
1119                 mpc52xx_fec_open(dev);
1120
1121         return 0;
1122 }
1123 #endif
1124
1125 static struct of_device_id mpc52xx_fec_match[] = {
1126         { .type = "network", .compatible = "fsl,mpc5200b-fec", },
1127         { .type = "network", .compatible = "fsl,mpc5200-fec", },
1128         { .type = "network", .compatible = "mpc5200-fec", },
1129         { }
1130 };
1131
1132 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1133
1134 static struct of_platform_driver mpc52xx_fec_driver = {
1135         .owner          = THIS_MODULE,
1136         .name           = DRIVER_NAME,
1137         .match_table    = mpc52xx_fec_match,
1138         .probe          = mpc52xx_fec_probe,
1139         .remove         = mpc52xx_fec_remove,
1140 #ifdef CONFIG_PM
1141         .suspend        = mpc52xx_fec_of_suspend,
1142         .resume         = mpc52xx_fec_of_resume,
1143 #endif
1144 };
1145
1146
1147 /* ======================================================================== */
1148 /* Module                                                                   */
1149 /* ======================================================================== */
1150
1151 static int __init
1152 mpc52xx_fec_init(void)
1153 {
1154 #ifdef CONFIG_FEC_MPC52xx_MDIO
1155         int ret;
1156         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1157         if (ret) {
1158                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1159                 return ret;
1160         }
1161 #endif
1162         return of_register_platform_driver(&mpc52xx_fec_driver);
1163 }
1164
1165 static void __exit
1166 mpc52xx_fec_exit(void)
1167 {
1168         of_unregister_platform_driver(&mpc52xx_fec_driver);
1169 #ifdef CONFIG_FEC_MPC52xx_MDIO
1170         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1171 #endif
1172 }
1173
1174
1175 module_init(mpc52xx_fec_init);
1176 module_exit(mpc52xx_fec_exit);
1177
1178 MODULE_LICENSE("GPL");
1179 MODULE_AUTHOR("Dale Farnsworth");
1180 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");