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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / fec_mpc52xx.c
blob9f81b1ac130e4f651bff6e73c7cec441d5dfe4db
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
370 spin_lock(&priv->lock);
371 while (bcom_buffer_done(priv->tx_dmatsk)) {
372 struct sk_buff *skb;
373 struct bcom_fec_bd *bd;
374 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
375 (struct bcom_bd **)&bd);
376 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
377 DMA_TO_DEVICE);
378
379 dev_kfree_skb_irq(skb);
380 }
381 spin_unlock(&priv->lock);
382
383 netif_wake_queue(dev);
384
385 return IRQ_HANDLED;
386 }
387
388 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
389 {
390 struct net_device *dev = dev_id;
391 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
392 struct sk_buff *rskb; /* received sk_buff */
393 struct sk_buff *skb; /* new sk_buff to enqueue in its place */
394 struct bcom_fec_bd *bd;
395 u32 status, physaddr;
396 int length;
397
398 spin_lock(&priv->lock);
399
400 while (bcom_buffer_done(priv->rx_dmatsk)) {
401
402 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
403 (struct bcom_bd **)&bd);
404 physaddr = bd->skb_pa;
405
406 /* Test for errors in received frame */
407 if (status & BCOM_FEC_RX_BD_ERRORS) {
408 /* Drop packet and reuse the buffer */
409 mpc52xx_fec_rx_submit(dev, rskb);
410 dev->stats.rx_dropped++;
411 continue;
412 }
413
414 /* skbs are allocated on open, so now we allocate a new one,
415 * and remove the old (with the packet) */
416 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
417 if (!skb) {
418 /* Can't get a new one : reuse the same & drop pkt */
419 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
420 mpc52xx_fec_rx_submit(dev, rskb);
421 dev->stats.rx_dropped++;
422 continue;
423 }
424
425 /* Enqueue the new sk_buff back on the hardware */
426 mpc52xx_fec_rx_submit(dev, skb);
427
428 /* Process the received skb - Drop the spin lock while
429 * calling into the network stack */
430 spin_unlock(&priv->lock);
431
432 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
433 DMA_FROM_DEVICE);
434 length = status & BCOM_FEC_RX_BD_LEN_MASK;
435 skb_put(rskb, length - 4); /* length without CRC32 */
436 rskb->protocol = eth_type_trans(rskb, dev);
437 netif_rx(rskb);
438
439 spin_lock(&priv->lock);
440 }
441
442 spin_unlock(&priv->lock);
443
444 return IRQ_HANDLED;
445 }
446
447 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
448 {
449 struct net_device *dev = dev_id;
450 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
451 struct mpc52xx_fec __iomem *fec = priv->fec;
452 u32 ievent;
453
454 ievent = in_be32(&fec->ievent);
455
456 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
457 if (!ievent)
458 return IRQ_NONE;
459
460 out_be32(&fec->ievent, ievent); /* clear pending events */
461
462 /* on fifo error, soft-reset fec */
463 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
464
465 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
466 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
467 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
468 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
469
470 spin_lock(&priv->lock);
471 mpc52xx_fec_reset(dev);
472 spin_unlock(&priv->lock);
473
474 return IRQ_HANDLED;
475 }
476
477 if (ievent & ~FEC_IEVENT_TFINT)
478 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
479
480 return IRQ_HANDLED;
481 }
482
483 /*
484 * Get the current statistics.
485 * This may be called with the card open or closed.
486 */
487 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
488 {
489 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
490 struct net_device_stats *stats = &dev->stats;
491 struct mpc52xx_fec __iomem *fec = priv->fec;
492
493 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
494 stats->rx_packets = in_be32(&fec->rmon_r_packets);
495 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
496 in_be32(&fec->rmon_r_undersize) +
497 in_be32(&fec->rmon_r_oversize) +
498 in_be32(&fec->rmon_r_frag) +
499 in_be32(&fec->rmon_r_jab);
500
501 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
502 stats->tx_packets = in_be32(&fec->rmon_t_packets);
503 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
504 in_be32(&fec->rmon_t_undersize) +
505 in_be32(&fec->rmon_t_oversize) +
506 in_be32(&fec->rmon_t_frag) +
507 in_be32(&fec->rmon_t_jab);
508
509 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
510 stats->collisions = in_be32(&fec->rmon_t_col);
511
512 /* detailed rx_errors: */
513 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
514 + in_be32(&fec->rmon_r_oversize)
515 + in_be32(&fec->rmon_r_frag)
516 + in_be32(&fec->rmon_r_jab);
517 stats->rx_over_errors = in_be32(&fec->r_macerr);
518 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
519 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
520 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
521 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
522
523 /* detailed tx_errors: */
524 stats->tx_aborted_errors = 0;
525 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
526 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
527 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
528 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
529
530 return stats;
531 }
532
533 /*
534 * Read MIB counters in order to reset them,
535 * then zero all the stats fields in memory
536 */
537 static void mpc52xx_fec_reset_stats(struct net_device *dev)
538 {
539 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
540 struct mpc52xx_fec __iomem *fec = priv->fec;
541
542 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
543 memset_io(&fec->rmon_t_drop, 0,
544 offsetof(struct mpc52xx_fec, reserved10) -
545 offsetof(struct mpc52xx_fec, rmon_t_drop));
546 out_be32(&fec->mib_control, 0);
547
548 memset(&dev->stats, 0, sizeof(dev->stats));
549 }
550
551 /*
552 * Set or clear the multicast filter for this adaptor.
553 */
554 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
555 {
556 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
557 struct mpc52xx_fec __iomem *fec = priv->fec;
558 u32 rx_control;
559
560 rx_control = in_be32(&fec->r_cntrl);
561
562 if (dev->flags & IFF_PROMISC) {
563 rx_control |= FEC_RCNTRL_PROM;
564 out_be32(&fec->r_cntrl, rx_control);
565 } else {
566 rx_control &= ~FEC_RCNTRL_PROM;
567 out_be32(&fec->r_cntrl, rx_control);
568
569 if (dev->flags & IFF_ALLMULTI) {
570 out_be32(&fec->gaddr1, 0xffffffff);
571 out_be32(&fec->gaddr2, 0xffffffff);
572 } else {
573 u32 crc;
574 struct netdev_hw_addr *ha;
575 u32 gaddr1 = 0x00000000;
576 u32 gaddr2 = 0x00000000;
577
578 netdev_for_each_mc_addr(ha, dev) {
579 crc = ether_crc_le(6, ha->addr) >> 26;
580 if (crc >= 32)
581 gaddr1 |= 1 << (crc-32);
582 else
583 gaddr2 |= 1 << crc;
584 }
585 out_be32(&fec->gaddr1, gaddr1);
586 out_be32(&fec->gaddr2, gaddr2);
587 }
588 }
589 }
590
591 /**
592 * mpc52xx_fec_hw_init
593 * @dev: network device
594 *
595 * Setup various hardware setting, only needed once on start
596 */
597 static void mpc52xx_fec_hw_init(struct net_device *dev)
598 {
599 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
600 struct mpc52xx_fec __iomem *fec = priv->fec;
601 int i;
602
603 /* Whack a reset. We should wait for this. */
604 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
605 for (i = 0; i < FEC_RESET_DELAY; ++i) {
606 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
607 break;
608 udelay(1);
609 }
610 if (i == FEC_RESET_DELAY)
611 dev_err(&dev->dev, "FEC Reset timeout!\n");
612
613 /* set pause to 0x20 frames */
614 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
615
616 /* high service request will be deasserted when there's < 7 bytes in fifo
617 * low service request will be deasserted when there's < 4*7 bytes in fifo
618 */
619 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
620 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
621
622 /* alarm when <= x bytes in FIFO */
623 out_be32(&fec->rfifo_alarm, 0x0000030c);
624 out_be32(&fec->tfifo_alarm, 0x00000100);
625
626 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
627 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
628
629 /* enable crc generation */
630 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
631 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
632 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
633
634 /* set phy speed.
635 * this can't be done in phy driver, since it needs to be called
636 * before fec stuff (even on resume) */
637 out_be32(&fec->mii_speed, priv->mdio_speed);
638 }
639
640 /**
641 * mpc52xx_fec_start
642 * @dev: network device
643 *
644 * This function is called to start or restart the FEC during a link
645 * change. This happens on fifo errors or when switching between half
646 * and full duplex.
647 */
648 static void mpc52xx_fec_start(struct net_device *dev)
649 {
650 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
651 struct mpc52xx_fec __iomem *fec = priv->fec;
652 u32 rcntrl;
653 u32 tcntrl;
654 u32 tmp;
655
656 /* clear sticky error bits */
657 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
658 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
659 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
660
661 /* FIFOs will reset on mpc52xx_fec_enable */
662 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
663
664 /* Set station address. */
665 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
666
667 mpc52xx_fec_set_multicast_list(dev);
668
669 /* set max frame len, enable flow control, select mii mode */
670 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
671 rcntrl |= FEC_RCNTRL_FCE;
672
673 if (!priv->seven_wire_mode)
674 rcntrl |= FEC_RCNTRL_MII_MODE;
675
676 if (priv->duplex == DUPLEX_FULL)
677 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
678 else {
679 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
680 tcntrl = 0;
681 }
682 out_be32(&fec->r_cntrl, rcntrl);
683 out_be32(&fec->x_cntrl, tcntrl);
684
685 /* Clear any outstanding interrupt. */
686 out_be32(&fec->ievent, 0xffffffff);
687
688 /* Enable interrupts we wish to service. */
689 out_be32(&fec->imask, FEC_IMASK_ENABLE);
690
691 /* And last, enable the transmit and receive processing. */
692 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
693 out_be32(&fec->r_des_active, 0x01000000);
694 }
695
696 /**
697 * mpc52xx_fec_stop
698 * @dev: network device
699 *
700 * stop all activity on fec and empty dma buffers
701 */
702 static void mpc52xx_fec_stop(struct net_device *dev)
703 {
704 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
705 struct mpc52xx_fec __iomem *fec = priv->fec;
706 unsigned long timeout;
707
708 /* disable all interrupts */
709 out_be32(&fec->imask, 0);
710
711 /* Disable the rx task. */
712 bcom_disable(priv->rx_dmatsk);
713
714 /* Wait for tx queue to drain, but only if we're in process context */
715 if (!in_interrupt()) {
716 timeout = jiffies + msecs_to_jiffies(2000);
717 while (time_before(jiffies, timeout) &&
718 !bcom_queue_empty(priv->tx_dmatsk))
719 msleep(100);
720
721 if (time_after_eq(jiffies, timeout))
722 dev_err(&dev->dev, "queues didn't drain\n");
723 #if 1
724 if (time_after_eq(jiffies, timeout)) {
725 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
726 priv->tx_dmatsk->index,
727 priv->tx_dmatsk->outdex);
728 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
729 priv->rx_dmatsk->index,
730 priv->rx_dmatsk->outdex);
731 }
732 #endif
733 }
734
735 bcom_disable(priv->tx_dmatsk);
736
737 /* Stop FEC */
738 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
739 }
740
741 /* reset fec and bestcomm tasks */
742 static void mpc52xx_fec_reset(struct net_device *dev)
743 {
744 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
745 struct mpc52xx_fec __iomem *fec = priv->fec;
746
747 mpc52xx_fec_stop(dev);
748
749 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
750 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
751
752 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
753
754 mpc52xx_fec_hw_init(dev);
755
756 bcom_fec_rx_reset(priv->rx_dmatsk);
757 bcom_fec_tx_reset(priv->tx_dmatsk);
758
759 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
760
761 bcom_enable(priv->rx_dmatsk);
762 bcom_enable(priv->tx_dmatsk);
763
764 mpc52xx_fec_start(dev);
765
766 netif_wake_queue(dev);
767 }
768
769
770 /* ethtool interface */
771
772 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
773 {
774 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
775
776 if (!priv->phydev)
777 return -ENODEV;
778
779 return phy_ethtool_gset(priv->phydev, cmd);
780 }
781
782 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
783 {
784 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
785
786 if (!priv->phydev)
787 return -ENODEV;
788
789 return phy_ethtool_sset(priv->phydev, cmd);
790 }
791
792 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
793 {
794 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
795 return priv->msg_enable;
796 }
797
798 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
799 {
800 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
801 priv->msg_enable = level;
802 }
803
804 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
805 .get_settings = mpc52xx_fec_get_settings,
806 .set_settings = mpc52xx_fec_set_settings,
807 .get_link = ethtool_op_get_link,
808 .get_msglevel = mpc52xx_fec_get_msglevel,
809 .set_msglevel = mpc52xx_fec_set_msglevel,
810 };
811
812
813 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
814 {
815 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
816
817 if (!priv->phydev)
818 return -ENOTSUPP;
819
820 return phy_mii_ioctl(priv->phydev, rq, cmd);
821 }
822
823 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
824 .ndo_open = mpc52xx_fec_open,
825 .ndo_stop = mpc52xx_fec_close,
826 .ndo_start_xmit = mpc52xx_fec_start_xmit,
827 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
828 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
829 .ndo_validate_addr = eth_validate_addr,
830 .ndo_do_ioctl = mpc52xx_fec_ioctl,
831 .ndo_change_mtu = eth_change_mtu,
832 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
833 .ndo_get_stats = mpc52xx_fec_get_stats,
834 #ifdef CONFIG_NET_POLL_CONTROLLER
835 .ndo_poll_controller = mpc52xx_fec_poll_controller,
836 #endif
837 };
838
839 /* ======================================================================== */
840 /* OF Driver */
841 /* ======================================================================== */
842
843 static int __devinit mpc52xx_fec_probe(struct platform_device *op)
844 {
845 int rv;
846 struct net_device *ndev;
847 struct mpc52xx_fec_priv *priv = NULL;
848 struct resource mem;
849 const u32 *prop;
850 int prop_size;
851
852 phys_addr_t rx_fifo;
853 phys_addr_t tx_fifo;
854
855 /* Get the ether ndev & it's private zone */
856 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
857 if (!ndev)
858 return -ENOMEM;
859
860 priv = netdev_priv(ndev);
861 priv->ndev = ndev;
862
863 /* Reserve FEC control zone */
864 rv = of_address_to_resource(op->dev.of_node, 0, &mem);
865 if (rv) {
866 printk(KERN_ERR DRIVER_NAME ": "
867 "Error while parsing device node resource\n" );
868 goto err_netdev;
869 }
870 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
871 printk(KERN_ERR DRIVER_NAME
872 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
873 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
874 rv = -EINVAL;
875 goto err_netdev;
876 }
877
878 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),
879 DRIVER_NAME)) {
880 rv = -EBUSY;
881 goto err_netdev;
882 }
883
884 /* Init ether ndev with what we have */
885 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
886 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
887 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
888 ndev->base_addr = mem.start;
889 SET_NETDEV_DEV(ndev, &op->dev);
890
891 spin_lock_init(&priv->lock);
892
893 /* ioremap the zones */
894 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
895
896 if (!priv->fec) {
897 rv = -ENOMEM;
898 goto err_mem_region;
899 }
900
901 /* Bestcomm init */
902 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
903 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
904
905 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
906 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
907
908 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
909 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
910 rv = -ENOMEM;
911 goto err_rx_tx_dmatsk;
912 }
913
914 /* Get the IRQ we need one by one */
915 /* Control */
916 ndev->irq = irq_of_parse_and_map(op->dev.of_node, 0);
917
918 /* RX */
919 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
920
921 /* TX */
922 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
923
924 /* MAC address init */
925 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
926 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
927 else
928 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
929
930 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
931
932 /*
933 * Link mode configuration
934 */
935
936 /* Start with safe defaults for link connection */
937 priv->speed = 100;
938 priv->duplex = DUPLEX_HALF;
939 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->dev.of_node) >> 20) / 5) << 1;
940
941 /* The current speed preconfigures the speed of the MII link */
942 prop = of_get_property(op->dev.of_node, "current-speed", &prop_size);
943 if (prop && (prop_size >= sizeof(u32) * 2)) {
944 priv->speed = prop[0];
945 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
946 }
947
948 /* If there is a phy handle, then get the PHY node */
949 priv->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0);
950
951 /* the 7-wire property means don't use MII mode */
952 if (of_find_property(op->dev.of_node, "fsl,7-wire-mode", NULL)) {
953 priv->seven_wire_mode = 1;
954 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
955 }
956
957 /* Hardware init */
958 mpc52xx_fec_hw_init(ndev);
959 mpc52xx_fec_reset_stats(ndev);
960
961 rv = register_netdev(ndev);
962 if (rv < 0)
963 goto err_node;
964
965 /* We're done ! */
966 dev_set_drvdata(&op->dev, ndev);
967
968 return 0;
969
970 err_node:
971 of_node_put(priv->phy_node);
972 irq_dispose_mapping(ndev->irq);
973 err_rx_tx_dmatsk:
974 if (priv->rx_dmatsk)
975 bcom_fec_rx_release(priv->rx_dmatsk);
976 if (priv->tx_dmatsk)
977 bcom_fec_tx_release(priv->tx_dmatsk);
978 iounmap(priv->fec);
979 err_mem_region:
980 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
981 err_netdev:
982 free_netdev(ndev);
983
984 return rv;
985 }
986
987 static int
988 mpc52xx_fec_remove(struct platform_device *op)
989 {
990 struct net_device *ndev;
991 struct mpc52xx_fec_priv *priv;
992
993 ndev = dev_get_drvdata(&op->dev);
994 priv = netdev_priv(ndev);
995
996 unregister_netdev(ndev);
997
998 if (priv->phy_node)
999 of_node_put(priv->phy_node);
1000 priv->phy_node = NULL;
1001
1002 irq_dispose_mapping(ndev->irq);
1003
1004 bcom_fec_rx_release(priv->rx_dmatsk);
1005 bcom_fec_tx_release(priv->tx_dmatsk);
1006
1007 iounmap(priv->fec);
1008
1009 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1010
1011 free_netdev(ndev);
1012
1013 dev_set_drvdata(&op->dev, NULL);
1014 return 0;
1015 }
1016
1017 #ifdef CONFIG_PM
1018 static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)
1019 {
1020 struct net_device *dev = dev_get_drvdata(&op->dev);
1021
1022 if (netif_running(dev))
1023 mpc52xx_fec_close(dev);
1024
1025 return 0;
1026 }
1027
1028 static int mpc52xx_fec_of_resume(struct platform_device *op)
1029 {
1030 struct net_device *dev = dev_get_drvdata(&op->dev);
1031
1032 mpc52xx_fec_hw_init(dev);
1033 mpc52xx_fec_reset_stats(dev);
1034
1035 if (netif_running(dev))
1036 mpc52xx_fec_open(dev);
1037
1038 return 0;
1039 }
1040 #endif
1041
1042 static struct of_device_id mpc52xx_fec_match[] = {
1043 { .compatible = "fsl,mpc5200b-fec", },
1044 { .compatible = "fsl,mpc5200-fec", },
1045 { .compatible = "mpc5200-fec", },
1046 { }
1047 };
1048
1049 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1050
1051 static struct platform_driver mpc52xx_fec_driver = {
1052 .driver = {
1053 .name = DRIVER_NAME,
1054 .owner = THIS_MODULE,
1055 .of_match_table = mpc52xx_fec_match,
1056 },
1057 .probe = mpc52xx_fec_probe,
1058 .remove = mpc52xx_fec_remove,
1059 #ifdef CONFIG_PM
1060 .suspend = mpc52xx_fec_of_suspend,
1061 .resume = mpc52xx_fec_of_resume,
1062 #endif
1063 };
1064
1065
1066 /* ======================================================================== */
1067 /* Module */
1068 /* ======================================================================== */
1069
1070 static int __init
1071 mpc52xx_fec_init(void)
1072 {
1073 #ifdef CONFIG_FEC_MPC52xx_MDIO
1074 int ret;
1075 ret = platform_driver_register(&mpc52xx_fec_mdio_driver);
1076 if (ret) {
1077 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1078 return ret;
1079 }
1080 #endif
1081 return platform_driver_register(&mpc52xx_fec_driver);
1082 }
1083
1084 static void __exit
1085 mpc52xx_fec_exit(void)
1086 {
1087 platform_driver_unregister(&mpc52xx_fec_driver);
1088 #ifdef CONFIG_FEC_MPC52xx_MDIO
1089 platform_driver_unregister(&mpc52xx_fec_mdio_driver);
1090 #endif
1091 }
1092
1093
1094 module_init(mpc52xx_fec_init);
1095 module_exit(mpc52xx_fec_exit);
1096
1097 MODULE_LICENSE("GPL");
1098 MODULE_AUTHOR("Dale Farnsworth");
1099 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");