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Now it works.
[cbs-scheduler.git] / drivers / net / fec_mpc52xx.c
blobcd8e98b45ec50d9e253dcc9251ce8e62f8703ab6
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, sizeof(phy_id), "%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");
A cbs scheduler for rt-kernel