This source file includes following definitions.
- mpc52xx_fec_tx_timeout
- mpc52xx_fec_set_paddr
- mpc52xx_fec_set_mac_address
- mpc52xx_fec_free_rx_buffers
- mpc52xx_fec_rx_submit
- mpc52xx_fec_alloc_rx_buffers
- mpc52xx_fec_adjust_link
- mpc52xx_fec_open
- mpc52xx_fec_close
- mpc52xx_fec_start_xmit
- mpc52xx_fec_poll_controller
- mpc52xx_fec_tx_interrupt
- mpc52xx_fec_rx_interrupt
- mpc52xx_fec_interrupt
- mpc52xx_fec_get_stats
- mpc52xx_fec_reset_stats
- mpc52xx_fec_set_multicast_list
- mpc52xx_fec_hw_init
- mpc52xx_fec_start
- mpc52xx_fec_stop
- mpc52xx_fec_reset
- mpc52xx_fec_get_msglevel
- mpc52xx_fec_set_msglevel
- mpc52xx_fec_ioctl
- mpc52xx_fec_probe
- mpc52xx_fec_remove
- mpc52xx_fec_of_suspend
- mpc52xx_fec_of_resume
- mpc52xx_fec_init
- mpc52xx_fec_exit
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17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/dma-mapping.h>
20 #include <linux/module.h>
21
22 #include <linux/kernel.h>
23 #include <linux/types.h>
24 #include <linux/spinlock.h>
25 #include <linux/slab.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/interrupt.h>
29 #include <linux/crc32.h>
30 #include <linux/hardirq.h>
31 #include <linux/delay.h>
32 #include <linux/of_device.h>
33 #include <linux/of_mdio.h>
34 #include <linux/of_net.h>
35 #include <linux/of_platform.h>
36
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/ethtool.h>
40 #include <linux/skbuff.h>
41
42 #include <asm/io.h>
43 #include <asm/delay.h>
44 #include <asm/mpc52xx.h>
45
46 #include <linux/fsl/bestcomm/bestcomm.h>
47 #include <linux/fsl/bestcomm/fec.h>
48
49 #include "fec_mpc52xx.h"
50
51 #define DRIVER_NAME "mpc52xx-fec"
52
53
54 struct mpc52xx_fec_priv {
55 struct net_device *ndev;
56 int duplex;
57 int speed;
58 int r_irq;
59 int t_irq;
60 struct mpc52xx_fec __iomem *fec;
61 struct bcom_task *rx_dmatsk;
62 struct bcom_task *tx_dmatsk;
63 spinlock_t lock;
64 int msg_enable;
65
66
67 unsigned int mdio_speed;
68 struct device_node *phy_node;
69 enum phy_state link;
70 int seven_wire_mode;
71 };
72
73
74 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
75 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
76 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
77 static void mpc52xx_fec_stop(struct net_device *dev);
78 static void mpc52xx_fec_start(struct net_device *dev);
79 static void mpc52xx_fec_reset(struct net_device *dev);
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;
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 int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
112 {
113 struct sockaddr *sock = addr;
114
115 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
116
117 mpc52xx_fec_set_paddr(dev, sock->sa_data);
118 return 0;
119 }
120
121 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
122 {
123 while (!bcom_queue_empty(s)) {
124 struct bcom_fec_bd *bd;
125 struct sk_buff *skb;
126
127 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
128 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
129 DMA_FROM_DEVICE);
130 kfree_skb(skb);
131 }
132 }
133
134 static void
135 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
136 {
137 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
138 struct bcom_fec_bd *bd;
139
140 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
141 bd->status = FEC_RX_BUFFER_SIZE;
142 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
143 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
144 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
145 }
146
147 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
148 {
149 struct sk_buff *skb;
150
151 while (!bcom_queue_full(rxtsk)) {
152 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);
153 if (!skb)
154 return -EAGAIN;
155
156
157 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
158 mpc52xx_fec_rx_submit(dev, skb);
159 }
160 return 0;
161 }
162
163
164 static void mpc52xx_fec_adjust_link(struct net_device *dev)
165 {
166 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
167 struct phy_device *phydev = dev->phydev;
168 int new_state = 0;
169
170 if (phydev->link != PHY_DOWN) {
171 if (phydev->duplex != priv->duplex) {
172 struct mpc52xx_fec __iomem *fec = priv->fec;
173 u32 rcntrl;
174 u32 tcntrl;
175
176 new_state = 1;
177 priv->duplex = phydev->duplex;
178
179 rcntrl = in_be32(&fec->r_cntrl);
180 tcntrl = in_be32(&fec->x_cntrl);
181
182 rcntrl &= ~FEC_RCNTRL_DRT;
183 tcntrl &= ~FEC_TCNTRL_FDEN;
184 if (phydev->duplex == DUPLEX_FULL)
185 tcntrl |= FEC_TCNTRL_FDEN;
186 else
187 rcntrl |= FEC_RCNTRL_DRT;
188
189 out_be32(&fec->r_cntrl, rcntrl);
190 out_be32(&fec->x_cntrl, tcntrl);
191 }
192
193 if (phydev->speed != priv->speed) {
194 new_state = 1;
195 priv->speed = phydev->speed;
196 }
197
198 if (priv->link == PHY_DOWN) {
199 new_state = 1;
200 priv->link = phydev->link;
201 }
202
203 } else if (priv->link) {
204 new_state = 1;
205 priv->link = PHY_DOWN;
206 priv->speed = 0;
207 priv->duplex = -1;
208 }
209
210 if (new_state && netif_msg_link(priv))
211 phy_print_status(phydev);
212 }
213
214 static int mpc52xx_fec_open(struct net_device *dev)
215 {
216 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
217 struct phy_device *phydev = NULL;
218 int err = -EBUSY;
219
220 if (priv->phy_node) {
221 phydev = of_phy_connect(priv->ndev, priv->phy_node,
222 mpc52xx_fec_adjust_link, 0, 0);
223 if (!phydev) {
224 dev_err(&dev->dev, "of_phy_connect failed\n");
225 return -ENODEV;
226 }
227 phy_start(phydev);
228 }
229
230 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
231 DRIVER_NAME "_ctrl", dev)) {
232 dev_err(&dev->dev, "ctrl interrupt request failed\n");
233 goto free_phy;
234 }
235 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
236 DRIVER_NAME "_rx", dev)) {
237 dev_err(&dev->dev, "rx interrupt request failed\n");
238 goto free_ctrl_irq;
239 }
240 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
241 DRIVER_NAME "_tx", dev)) {
242 dev_err(&dev->dev, "tx interrupt request failed\n");
243 goto free_2irqs;
244 }
245
246 bcom_fec_rx_reset(priv->rx_dmatsk);
247 bcom_fec_tx_reset(priv->tx_dmatsk);
248
249 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
250 if (err) {
251 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
252 goto free_irqs;
253 }
254
255 bcom_enable(priv->rx_dmatsk);
256 bcom_enable(priv->tx_dmatsk);
257
258 mpc52xx_fec_start(dev);
259
260 netif_start_queue(dev);
261
262 return 0;
263
264 free_irqs:
265 free_irq(priv->t_irq, dev);
266 free_2irqs:
267 free_irq(priv->r_irq, dev);
268 free_ctrl_irq:
269 free_irq(dev->irq, dev);
270 free_phy:
271 if (phydev) {
272 phy_stop(phydev);
273 phy_disconnect(phydev);
274 }
275
276 return err;
277 }
278
279 static int mpc52xx_fec_close(struct net_device *dev)
280 {
281 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
282 struct phy_device *phydev = dev->phydev;
283
284 netif_stop_queue(dev);
285
286 mpc52xx_fec_stop(dev);
287
288 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
289
290 free_irq(dev->irq, dev);
291 free_irq(priv->r_irq, dev);
292 free_irq(priv->t_irq, dev);
293
294 if (phydev) {
295
296 phy_stop(phydev);
297 phy_disconnect(phydev);
298 }
299
300 return 0;
301 }
302
303
304
305
306
307
308 static netdev_tx_t
309 mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
310 {
311 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
312 struct bcom_fec_bd *bd;
313 unsigned long flags;
314
315 if (bcom_queue_full(priv->tx_dmatsk)) {
316 if (net_ratelimit())
317 dev_err(&dev->dev, "transmit queue overrun\n");
318 return NETDEV_TX_BUSY;
319 }
320
321 spin_lock_irqsave(&priv->lock, flags);
322
323 bd = (struct bcom_fec_bd *)
324 bcom_prepare_next_buffer(priv->tx_dmatsk);
325
326 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
327 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
328 DMA_TO_DEVICE);
329
330 skb_tx_timestamp(skb);
331 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
332 spin_unlock_irqrestore(&priv->lock, flags);
333
334 if (bcom_queue_full(priv->tx_dmatsk)) {
335 netif_stop_queue(dev);
336 }
337
338 return NETDEV_TX_OK;
339 }
340
341 #ifdef CONFIG_NET_POLL_CONTROLLER
342 static void mpc52xx_fec_poll_controller(struct net_device *dev)
343 {
344 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
345
346 disable_irq(priv->t_irq);
347 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
348 enable_irq(priv->t_irq);
349 disable_irq(priv->r_irq);
350 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
351 enable_irq(priv->r_irq);
352 }
353 #endif
354
355
356
357
358 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
359 {
360 struct net_device *dev = dev_id;
361 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
362
363 spin_lock(&priv->lock);
364 while (bcom_buffer_done(priv->tx_dmatsk)) {
365 struct sk_buff *skb;
366 struct bcom_fec_bd *bd;
367 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
368 (struct bcom_bd **)&bd);
369 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
370 DMA_TO_DEVICE);
371
372 dev_consume_skb_irq(skb);
373 }
374 spin_unlock(&priv->lock);
375
376 netif_wake_queue(dev);
377
378 return IRQ_HANDLED;
379 }
380
381 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
382 {
383 struct net_device *dev = dev_id;
384 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
385 struct sk_buff *rskb;
386 struct sk_buff *skb;
387 struct bcom_fec_bd *bd;
388 u32 status, physaddr;
389 int length;
390
391 spin_lock(&priv->lock);
392
393 while (bcom_buffer_done(priv->rx_dmatsk)) {
394
395 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
396 (struct bcom_bd **)&bd);
397 physaddr = bd->skb_pa;
398
399
400 if (status & BCOM_FEC_RX_BD_ERRORS) {
401
402 mpc52xx_fec_rx_submit(dev, rskb);
403 dev->stats.rx_dropped++;
404 continue;
405 }
406
407
408
409 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);
410 if (!skb) {
411
412 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
413 mpc52xx_fec_rx_submit(dev, rskb);
414 dev->stats.rx_dropped++;
415 continue;
416 }
417
418
419 mpc52xx_fec_rx_submit(dev, skb);
420
421
422
423 spin_unlock(&priv->lock);
424
425 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
426 DMA_FROM_DEVICE);
427 length = status & BCOM_FEC_RX_BD_LEN_MASK;
428 skb_put(rskb, length - 4);
429 rskb->protocol = eth_type_trans(rskb, dev);
430 if (!skb_defer_rx_timestamp(rskb))
431 netif_rx(rskb);
432
433 spin_lock(&priv->lock);
434 }
435
436 spin_unlock(&priv->lock);
437
438 return IRQ_HANDLED;
439 }
440
441 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
442 {
443 struct net_device *dev = dev_id;
444 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
445 struct mpc52xx_fec __iomem *fec = priv->fec;
446 u32 ievent;
447
448 ievent = in_be32(&fec->ievent);
449
450 ievent &= ~FEC_IEVENT_MII;
451 if (!ievent)
452 return IRQ_NONE;
453
454 out_be32(&fec->ievent, ievent);
455
456
457 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
458
459 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
460 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
461 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
462 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
463
464 spin_lock(&priv->lock);
465 mpc52xx_fec_reset(dev);
466 spin_unlock(&priv->lock);
467
468 return IRQ_HANDLED;
469 }
470
471 if (ievent & ~FEC_IEVENT_TFINT)
472 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
473
474 return IRQ_HANDLED;
475 }
476
477
478
479
480
481 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
482 {
483 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
484 struct net_device_stats *stats = &dev->stats;
485 struct mpc52xx_fec __iomem *fec = priv->fec;
486
487 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
488 stats->rx_packets = in_be32(&fec->rmon_r_packets);
489 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
490 in_be32(&fec->rmon_r_undersize) +
491 in_be32(&fec->rmon_r_oversize) +
492 in_be32(&fec->rmon_r_frag) +
493 in_be32(&fec->rmon_r_jab);
494
495 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
496 stats->tx_packets = in_be32(&fec->rmon_t_packets);
497 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
498 in_be32(&fec->rmon_t_undersize) +
499 in_be32(&fec->rmon_t_oversize) +
500 in_be32(&fec->rmon_t_frag) +
501 in_be32(&fec->rmon_t_jab);
502
503 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
504 stats->collisions = in_be32(&fec->rmon_t_col);
505
506
507 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
508 + in_be32(&fec->rmon_r_oversize)
509 + in_be32(&fec->rmon_r_frag)
510 + in_be32(&fec->rmon_r_jab);
511 stats->rx_over_errors = in_be32(&fec->r_macerr);
512 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
513 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
514 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
515 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
516
517
518 stats->tx_aborted_errors = 0;
519 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
520 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
521 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
522 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
523
524 return stats;
525 }
526
527
528
529
530
531 static void mpc52xx_fec_reset_stats(struct net_device *dev)
532 {
533 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
534 struct mpc52xx_fec __iomem *fec = priv->fec;
535
536 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
537 memset_io(&fec->rmon_t_drop, 0,
538 offsetof(struct mpc52xx_fec, reserved10) -
539 offsetof(struct mpc52xx_fec, rmon_t_drop));
540 out_be32(&fec->mib_control, 0);
541
542 memset(&dev->stats, 0, sizeof(dev->stats));
543 }
544
545
546
547
548 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
549 {
550 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
551 struct mpc52xx_fec __iomem *fec = priv->fec;
552 u32 rx_control;
553
554 rx_control = in_be32(&fec->r_cntrl);
555
556 if (dev->flags & IFF_PROMISC) {
557 rx_control |= FEC_RCNTRL_PROM;
558 out_be32(&fec->r_cntrl, rx_control);
559 } else {
560 rx_control &= ~FEC_RCNTRL_PROM;
561 out_be32(&fec->r_cntrl, rx_control);
562
563 if (dev->flags & IFF_ALLMULTI) {
564 out_be32(&fec->gaddr1, 0xffffffff);
565 out_be32(&fec->gaddr2, 0xffffffff);
566 } else {
567 u32 crc;
568 struct netdev_hw_addr *ha;
569 u32 gaddr1 = 0x00000000;
570 u32 gaddr2 = 0x00000000;
571
572 netdev_for_each_mc_addr(ha, dev) {
573 crc = ether_crc_le(6, ha->addr) >> 26;
574 if (crc >= 32)
575 gaddr1 |= 1 << (crc-32);
576 else
577 gaddr2 |= 1 << crc;
578 }
579 out_be32(&fec->gaddr1, gaddr1);
580 out_be32(&fec->gaddr2, gaddr2);
581 }
582 }
583 }
584
585
586
587
588
589
590
591 static void mpc52xx_fec_hw_init(struct net_device *dev)
592 {
593 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
594 struct mpc52xx_fec __iomem *fec = priv->fec;
595 int i;
596
597
598 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
599 for (i = 0; i < FEC_RESET_DELAY; ++i) {
600 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
601 break;
602 udelay(1);
603 }
604 if (i == FEC_RESET_DELAY)
605 dev_err(&dev->dev, "FEC Reset timeout!\n");
606
607
608 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
609
610
611
612
613 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
614 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
615
616
617 out_be32(&fec->rfifo_alarm, 0x0000030c);
618 out_be32(&fec->tfifo_alarm, 0x00000100);
619
620
621 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
622
623
624 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
625 out_be32(&fec->iaddr1, 0x00000000);
626 out_be32(&fec->iaddr2, 0x00000000);
627
628
629
630
631 out_be32(&fec->mii_speed, priv->mdio_speed);
632 }
633
634
635
636
637
638
639
640
641
642 static void mpc52xx_fec_start(struct net_device *dev)
643 {
644 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
645 struct mpc52xx_fec __iomem *fec = priv->fec;
646 u32 rcntrl;
647 u32 tcntrl;
648 u32 tmp;
649
650
651 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
652 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
653 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
654
655
656 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
657
658
659 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
660
661 mpc52xx_fec_set_multicast_list(dev);
662
663
664 rcntrl = FEC_RX_BUFFER_SIZE << 16;
665 rcntrl |= FEC_RCNTRL_FCE;
666
667 if (!priv->seven_wire_mode)
668 rcntrl |= FEC_RCNTRL_MII_MODE;
669
670 if (priv->duplex == DUPLEX_FULL)
671 tcntrl = FEC_TCNTRL_FDEN;
672 else {
673 rcntrl |= FEC_RCNTRL_DRT;
674 tcntrl = 0;
675 }
676 out_be32(&fec->r_cntrl, rcntrl);
677 out_be32(&fec->x_cntrl, tcntrl);
678
679
680 out_be32(&fec->ievent, 0xffffffff);
681
682
683 out_be32(&fec->imask, FEC_IMASK_ENABLE);
684
685
686 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
687 out_be32(&fec->r_des_active, 0x01000000);
688 }
689
690
691
692
693
694
695
696 static void mpc52xx_fec_stop(struct net_device *dev)
697 {
698 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
699 struct mpc52xx_fec __iomem *fec = priv->fec;
700 unsigned long timeout;
701
702
703 out_be32(&fec->imask, 0);
704
705
706 bcom_disable(priv->rx_dmatsk);
707
708
709 if (!in_interrupt()) {
710 timeout = jiffies + msecs_to_jiffies(2000);
711 while (time_before(jiffies, timeout) &&
712 !bcom_queue_empty(priv->tx_dmatsk))
713 msleep(100);
714
715 if (time_after_eq(jiffies, timeout))
716 dev_err(&dev->dev, "queues didn't drain\n");
717 #if 1
718 if (time_after_eq(jiffies, timeout)) {
719 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
720 priv->tx_dmatsk->index,
721 priv->tx_dmatsk->outdex);
722 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
723 priv->rx_dmatsk->index,
724 priv->rx_dmatsk->outdex);
725 }
726 #endif
727 }
728
729 bcom_disable(priv->tx_dmatsk);
730
731
732 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
733 }
734
735
736 static void mpc52xx_fec_reset(struct net_device *dev)
737 {
738 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
739 struct mpc52xx_fec __iomem *fec = priv->fec;
740
741 mpc52xx_fec_stop(dev);
742
743 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
744 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
745
746 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
747
748 mpc52xx_fec_hw_init(dev);
749
750 bcom_fec_rx_reset(priv->rx_dmatsk);
751 bcom_fec_tx_reset(priv->tx_dmatsk);
752
753 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
754
755 bcom_enable(priv->rx_dmatsk);
756 bcom_enable(priv->tx_dmatsk);
757
758 mpc52xx_fec_start(dev);
759
760 netif_wake_queue(dev);
761 }
762
763
764
765
766 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
767 {
768 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
769 return priv->msg_enable;
770 }
771
772 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
773 {
774 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
775 priv->msg_enable = level;
776 }
777
778 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
779 .get_link = ethtool_op_get_link,
780 .get_msglevel = mpc52xx_fec_get_msglevel,
781 .set_msglevel = mpc52xx_fec_set_msglevel,
782 .get_ts_info = ethtool_op_get_ts_info,
783 .get_link_ksettings = phy_ethtool_get_link_ksettings,
784 .set_link_ksettings = phy_ethtool_set_link_ksettings,
785 };
786
787
788 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
789 {
790 struct phy_device *phydev = dev->phydev;
791
792 if (!phydev)
793 return -ENOTSUPP;
794
795 return phy_mii_ioctl(phydev, rq, cmd);
796 }
797
798 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
799 .ndo_open = mpc52xx_fec_open,
800 .ndo_stop = mpc52xx_fec_close,
801 .ndo_start_xmit = mpc52xx_fec_start_xmit,
802 .ndo_set_rx_mode = mpc52xx_fec_set_multicast_list,
803 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
804 .ndo_validate_addr = eth_validate_addr,
805 .ndo_do_ioctl = mpc52xx_fec_ioctl,
806 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
807 .ndo_get_stats = mpc52xx_fec_get_stats,
808 #ifdef CONFIG_NET_POLL_CONTROLLER
809 .ndo_poll_controller = mpc52xx_fec_poll_controller,
810 #endif
811 };
812
813
814
815
816
817 static int mpc52xx_fec_probe(struct platform_device *op)
818 {
819 int rv;
820 struct net_device *ndev;
821 struct mpc52xx_fec_priv *priv = NULL;
822 struct resource mem;
823 const u32 *prop;
824 int prop_size;
825 struct device_node *np = op->dev.of_node;
826 const char *mac_addr;
827
828 phys_addr_t rx_fifo;
829 phys_addr_t tx_fifo;
830
831
832 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
833 if (!ndev)
834 return -ENOMEM;
835
836 priv = netdev_priv(ndev);
837 priv->ndev = ndev;
838
839
840 rv = of_address_to_resource(np, 0, &mem);
841 if (rv) {
842 pr_err("Error while parsing device node resource\n");
843 goto err_netdev;
844 }
845 if (resource_size(&mem) < sizeof(struct mpc52xx_fec)) {
846 pr_err("invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
847 (unsigned long)resource_size(&mem),
848 sizeof(struct mpc52xx_fec));
849 rv = -EINVAL;
850 goto err_netdev;
851 }
852
853 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),
854 DRIVER_NAME)) {
855 rv = -EBUSY;
856 goto err_netdev;
857 }
858
859
860 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
861 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
862 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
863 ndev->base_addr = mem.start;
864 SET_NETDEV_DEV(ndev, &op->dev);
865
866 spin_lock_init(&priv->lock);
867
868
869 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
870
871 if (!priv->fec) {
872 rv = -ENOMEM;
873 goto err_mem_region;
874 }
875
876
877 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
878 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
879
880 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
881 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
882
883 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
884 pr_err("Can not init SDMA tasks\n");
885 rv = -ENOMEM;
886 goto err_rx_tx_dmatsk;
887 }
888
889
890
891 ndev->irq = irq_of_parse_and_map(np, 0);
892
893
894 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
895
896
897 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
898
899
900
901
902
903
904 mac_addr = of_get_mac_address(np);
905 if (!IS_ERR(mac_addr)) {
906 ether_addr_copy(ndev->dev_addr, mac_addr);
907 } else {
908 struct mpc52xx_fec __iomem *fec = priv->fec;
909
910
911
912
913
914 *(u32 *)(&ndev->dev_addr[0]) = in_be32(&fec->paddr1);
915 *(u16 *)(&ndev->dev_addr[4]) = in_be32(&fec->paddr2) >> 16;
916 }
917
918
919
920
921 if (!is_valid_ether_addr(ndev->dev_addr)) {
922 eth_hw_addr_random(ndev);
923 dev_warn(&ndev->dev, "using random MAC address %pM\n",
924 ndev->dev_addr);
925 }
926
927 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
928
929
930
931
932
933
934 priv->speed = 100;
935 priv->duplex = DUPLEX_HALF;
936 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(np) >> 20) / 5) << 1;
937
938
939 prop = of_get_property(np, "current-speed", &prop_size);
940 if (prop && (prop_size >= sizeof(u32) * 2)) {
941 priv->speed = prop[0];
942 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
943 }
944
945
946 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
947
948
949 if (of_find_property(np, "fsl,7-wire-mode", NULL)) {
950 priv->seven_wire_mode = 1;
951 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
952 }
953
954
955 mpc52xx_fec_hw_init(ndev);
956 mpc52xx_fec_reset_stats(ndev);
957
958 rv = register_netdev(ndev);
959 if (rv < 0)
960 goto err_node;
961
962
963 platform_set_drvdata(op, ndev);
964 netdev_info(ndev, "%pOF MAC %pM\n",
965 op->dev.of_node, ndev->dev_addr);
966
967 return 0;
968
969 err_node:
970 of_node_put(priv->phy_node);
971 irq_dispose_mapping(ndev->irq);
972 err_rx_tx_dmatsk:
973 if (priv->rx_dmatsk)
974 bcom_fec_rx_release(priv->rx_dmatsk);
975 if (priv->tx_dmatsk)
976 bcom_fec_tx_release(priv->tx_dmatsk);
977 iounmap(priv->fec);
978 err_mem_region:
979 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
980 err_netdev:
981 free_netdev(ndev);
982
983 return rv;
984 }
985
986 static int
987 mpc52xx_fec_remove(struct platform_device *op)
988 {
989 struct net_device *ndev;
990 struct mpc52xx_fec_priv *priv;
991
992 ndev = platform_get_drvdata(op);
993 priv = netdev_priv(ndev);
994
995 unregister_netdev(ndev);
996
997 of_node_put(priv->phy_node);
998 priv->phy_node = NULL;
999
1000 irq_dispose_mapping(ndev->irq);
1001
1002 bcom_fec_rx_release(priv->rx_dmatsk);
1003 bcom_fec_tx_release(priv->tx_dmatsk);
1004
1005 iounmap(priv->fec);
1006
1007 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1008
1009 free_netdev(ndev);
1010
1011 return 0;
1012 }
1013
1014 #ifdef CONFIG_PM
1015 static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)
1016 {
1017 struct net_device *dev = platform_get_drvdata(op);
1018
1019 if (netif_running(dev))
1020 mpc52xx_fec_close(dev);
1021
1022 return 0;
1023 }
1024
1025 static int mpc52xx_fec_of_resume(struct platform_device *op)
1026 {
1027 struct net_device *dev = platform_get_drvdata(op);
1028
1029 mpc52xx_fec_hw_init(dev);
1030 mpc52xx_fec_reset_stats(dev);
1031
1032 if (netif_running(dev))
1033 mpc52xx_fec_open(dev);
1034
1035 return 0;
1036 }
1037 #endif
1038
1039 static const struct of_device_id mpc52xx_fec_match[] = {
1040 { .compatible = "fsl,mpc5200b-fec", },
1041 { .compatible = "fsl,mpc5200-fec", },
1042 { .compatible = "mpc5200-fec", },
1043 { }
1044 };
1045
1046 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1047
1048 static struct platform_driver mpc52xx_fec_driver = {
1049 .driver = {
1050 .name = DRIVER_NAME,
1051 .of_match_table = mpc52xx_fec_match,
1052 },
1053 .probe = mpc52xx_fec_probe,
1054 .remove = mpc52xx_fec_remove,
1055 #ifdef CONFIG_PM
1056 .suspend = mpc52xx_fec_of_suspend,
1057 .resume = mpc52xx_fec_of_resume,
1058 #endif
1059 };
1060
1061
1062
1063
1064
1065
1066 static struct platform_driver * const drivers[] = {
1067 #ifdef CONFIG_FEC_MPC52xx_MDIO
1068 &mpc52xx_fec_mdio_driver,
1069 #endif
1070 &mpc52xx_fec_driver,
1071 };
1072
1073 static int __init
1074 mpc52xx_fec_init(void)
1075 {
1076 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1077 }
1078
1079 static void __exit
1080 mpc52xx_fec_exit(void)
1081 {
1082 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1083 }
1084
1085
1086 module_init(mpc52xx_fec_init);
1087 module_exit(mpc52xx_fec_exit);
1088
1089 MODULE_LICENSE("GPL");
1090 MODULE_AUTHOR("Dale Farnsworth");
1091 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");