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Merge commit 'v2.6.27-rc1' into x86/urgent
[linux-2.6/x86.git] / drivers / net / fec_mpc52xx.c
blob4e4f68304e822ed9a1356ee9d225d5f5324358fa
1 /*
2 * Driver for the MPC5200 Fast Ethernet Controller
3 *
4 * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
5 * now maintained by Sylvain Munaut <tnt@246tNt.com>
6 *
7 * Copyright (C) 2007 Domen Puncer, Telargo, Inc.
8 * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
9 * Copyright (C) 2003-2004 MontaVista, Software, Inc.
10 *
11 * This file is licensed under the terms of the GNU General Public License
12 * version 2. This program is licensed "as is" without any warranty of any
13 * kind, whether express or implied.
14 *
15 */
16
17 #include <linux/module.h>
18
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/spinlock.h>
22 #include <linux/errno.h>
23 #include <linux/init.h>
24 #include <linux/crc32.h>
25 #include <linux/hardirq.h>
26 #include <linux/delay.h>
27 #include <linux/of_device.h>
28 #include <linux/of_platform.h>
29
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/ethtool.h>
33 #include <linux/skbuff.h>
34
35 #include <asm/io.h>
36 #include <asm/delay.h>
37 #include <asm/mpc52xx.h>
38
39 #include <sysdev/bestcomm/bestcomm.h>
40 #include <sysdev/bestcomm/fec.h>
41
42 #include "fec_mpc52xx.h"
43
44 #define DRIVER_NAME "mpc52xx-fec"
45
46 #define FEC5200_PHYADDR_NONE (-1)
47 #define FEC5200_PHYADDR_7WIRE (-2)
48
49 /* Private driver data structure */
50 struct mpc52xx_fec_priv {
51 int duplex;
52 int speed;
53 int r_irq;
54 int t_irq;
55 struct mpc52xx_fec __iomem *fec;
56 struct bcom_task *rx_dmatsk;
57 struct bcom_task *tx_dmatsk;
58 spinlock_t lock;
59 int msg_enable;
60
61 /* MDIO link details */
62 int phy_addr;
63 unsigned int phy_speed;
64 struct phy_device *phydev;
65 enum phy_state link;
66 };
67
68
69 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
70 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
71 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
72 static void mpc52xx_fec_stop(struct net_device *dev);
73 static void mpc52xx_fec_start(struct net_device *dev);
74 static void mpc52xx_fec_reset(struct net_device *dev);
75
76 static u8 mpc52xx_fec_mac_addr[6];
77 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
78 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
79
80 #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
81 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
82 static int debug = -1; /* the above default */
83 module_param(debug, int, 0);
84 MODULE_PARM_DESC(debug, "debugging messages level");
85
86 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
87 {
88 dev_warn(&dev->dev, "transmit timed out\n");
89
90 mpc52xx_fec_reset(dev);
91
92 dev->stats.tx_errors++;
93
94 netif_wake_queue(dev);
95 }
96
97 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
98 {
99 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
100 struct mpc52xx_fec __iomem *fec = priv->fec;
101
102 out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
103 out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
104 }
105
106 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
107 {
108 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
109 struct mpc52xx_fec __iomem *fec = priv->fec;
110
111 *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
112 *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
113 }
114
115 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
116 {
117 struct sockaddr *sock = addr;
118
119 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
120
121 mpc52xx_fec_set_paddr(dev, sock->sa_data);
122 return 0;
123 }
124
125 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
126 {
127 while (!bcom_queue_empty(s)) {
128 struct bcom_fec_bd *bd;
129 struct sk_buff *skb;
130
131 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
132 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
133 kfree_skb(skb);
134 }
135 }
136
137 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
138 {
139 while (!bcom_queue_full(rxtsk)) {
140 struct sk_buff *skb;
141 struct bcom_fec_bd *bd;
142
143 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
144 if (skb == NULL)
145 return -EAGAIN;
146
147 /* zero out the initial receive buffers to aid debugging */
148 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
149
150 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
151
152 bd->status = FEC_RX_BUFFER_SIZE;
153 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
154 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
155
156 bcom_submit_next_buffer(rxtsk, skb);
157 }
158
159 return 0;
160 }
161
162 /* based on generic_adjust_link from fs_enet-main.c */
163 static void mpc52xx_fec_adjust_link(struct net_device *dev)
164 {
165 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
166 struct phy_device *phydev = priv->phydev;
167 int new_state = 0;
168
169 if (phydev->link != PHY_DOWN) {
170 if (phydev->duplex != priv->duplex) {
171 struct mpc52xx_fec __iomem *fec = priv->fec;
172 u32 rcntrl;
173 u32 tcntrl;
174
175 new_state = 1;
176 priv->duplex = phydev->duplex;
177
178 rcntrl = in_be32(&fec->r_cntrl);
179 tcntrl = in_be32(&fec->x_cntrl);
180
181 rcntrl &= ~FEC_RCNTRL_DRT;
182 tcntrl &= ~FEC_TCNTRL_FDEN;
183 if (phydev->duplex == DUPLEX_FULL)
184 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
185 else
186 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
187
188 out_be32(&fec->r_cntrl, rcntrl);
189 out_be32(&fec->x_cntrl, tcntrl);
190 }
191
192 if (phydev->speed != priv->speed) {
193 new_state = 1;
194 priv->speed = phydev->speed;
195 }
196
197 if (priv->link == PHY_DOWN) {
198 new_state = 1;
199 priv->link = phydev->link;
200 }
201
202 } else if (priv->link) {
203 new_state = 1;
204 priv->link = PHY_DOWN;
205 priv->speed = 0;
206 priv->duplex = -1;
207 }
208
209 if (new_state && netif_msg_link(priv))
210 phy_print_status(phydev);
211 }
212
213 static int mpc52xx_fec_init_phy(struct net_device *dev)
214 {
215 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
216 struct phy_device *phydev;
217 char phy_id[BUS_ID_SIZE];
218
219 snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
220 (unsigned int)dev->base_addr, priv->phy_addr);
221
222 priv->link = PHY_DOWN;
223 priv->speed = 0;
224 priv->duplex = -1;
225
226 phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
227 if (IS_ERR(phydev)) {
228 dev_err(&dev->dev, "phy_connect failed\n");
229 return PTR_ERR(phydev);
230 }
231 dev_info(&dev->dev, "attached phy %i to driver %s\n",
232 phydev->addr, phydev->drv->name);
233
234 priv->phydev = phydev;
235
236 return 0;
237 }
238
239 static int mpc52xx_fec_phy_start(struct net_device *dev)
240 {
241 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
242 int err;
243
244 if (priv->phy_addr < 0)
245 return 0;
246
247 err = mpc52xx_fec_init_phy(dev);
248 if (err) {
249 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
250 return err;
251 }
252
253 /* reset phy - this also wakes it from PDOWN */
254 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
255 phy_start(priv->phydev);
256
257 return 0;
258 }
259
260 static void mpc52xx_fec_phy_stop(struct net_device *dev)
261 {
262 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
263
264 if (!priv->phydev)
265 return;
266
267 phy_disconnect(priv->phydev);
268 /* power down phy */
269 phy_stop(priv->phydev);
270 phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
271 }
272
273 static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
274 struct mii_ioctl_data *mii_data, int cmd)
275 {
276 if (!priv->phydev)
277 return -ENOTSUPP;
278
279 return phy_mii_ioctl(priv->phydev, mii_data, cmd);
280 }
281
282 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
283 {
284 struct mpc52xx_fec __iomem *fec = priv->fec;
285
286 if (priv->phydev)
287 return;
288
289 out_be32(&fec->mii_speed, priv->phy_speed);
290 }
291
292 static int mpc52xx_fec_open(struct net_device *dev)
293 {
294 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
295 int err = -EBUSY;
296
297 if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
298 DRIVER_NAME "_ctrl", dev)) {
299 dev_err(&dev->dev, "ctrl interrupt request failed\n");
300 goto out;
301 }
302 if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
303 DRIVER_NAME "_rx", dev)) {
304 dev_err(&dev->dev, "rx interrupt request failed\n");
305 goto free_ctrl_irq;
306 }
307 if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
308 DRIVER_NAME "_tx", dev)) {
309 dev_err(&dev->dev, "tx interrupt request failed\n");
310 goto free_2irqs;
311 }
312
313 bcom_fec_rx_reset(priv->rx_dmatsk);
314 bcom_fec_tx_reset(priv->tx_dmatsk);
315
316 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
317 if (err) {
318 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
319 goto free_irqs;
320 }
321
322 err = mpc52xx_fec_phy_start(dev);
323 if (err)
324 goto free_skbs;
325
326 bcom_enable(priv->rx_dmatsk);
327 bcom_enable(priv->tx_dmatsk);
328
329 mpc52xx_fec_start(dev);
330
331 netif_start_queue(dev);
332
333 return 0;
334
335 free_skbs:
336 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
337
338 free_irqs:
339 free_irq(priv->t_irq, dev);
340 free_2irqs:
341 free_irq(priv->r_irq, dev);
342 free_ctrl_irq:
343 free_irq(dev->irq, dev);
344 out:
345
346 return err;
347 }
348
349 static int mpc52xx_fec_close(struct net_device *dev)
350 {
351 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
352
353 netif_stop_queue(dev);
354
355 mpc52xx_fec_stop(dev);
356
357 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
358
359 free_irq(dev->irq, dev);
360 free_irq(priv->r_irq, dev);
361 free_irq(priv->t_irq, dev);
362
363 mpc52xx_fec_phy_stop(dev);
364
365 return 0;
366 }
367
368 /* This will only be invoked if your driver is _not_ in XOFF state.
369 * What this means is that you need not check it, and that this
370 * invariant will hold if you make sure that the netif_*_queue()
371 * calls are done at the proper times.
372 */
373 static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
374 {
375 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
376 struct bcom_fec_bd *bd;
377
378 if (bcom_queue_full(priv->tx_dmatsk)) {
379 if (net_ratelimit())
380 dev_err(&dev->dev, "transmit queue overrun\n");
381 return 1;
382 }
383
384 spin_lock_irq(&priv->lock);
385 dev->trans_start = jiffies;
386
387 bd = (struct bcom_fec_bd *)
388 bcom_prepare_next_buffer(priv->tx_dmatsk);
389
390 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
391 bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
392
393 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
394
395 if (bcom_queue_full(priv->tx_dmatsk)) {
396 netif_stop_queue(dev);
397 }
398
399 spin_unlock_irq(&priv->lock);
400
401 return 0;
402 }
403
404 /* This handles BestComm transmit task interrupts
405 */
406 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
407 {
408 struct net_device *dev = dev_id;
409 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
410
411 spin_lock(&priv->lock);
412
413 while (bcom_buffer_done(priv->tx_dmatsk)) {
414 struct sk_buff *skb;
415 struct bcom_fec_bd *bd;
416 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
417 (struct bcom_bd **)&bd);
418 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
419
420 dev_kfree_skb_irq(skb);
421 }
422
423 netif_wake_queue(dev);
424
425 spin_unlock(&priv->lock);
426
427 return IRQ_HANDLED;
428 }
429
430 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
431 {
432 struct net_device *dev = dev_id;
433 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
434
435 while (bcom_buffer_done(priv->rx_dmatsk)) {
436 struct sk_buff *skb;
437 struct sk_buff *rskb;
438 struct bcom_fec_bd *bd;
439 u32 status;
440
441 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
442 (struct bcom_bd **)&bd);
443 dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
444
445 /* Test for errors in received frame */
446 if (status & BCOM_FEC_RX_BD_ERRORS) {
447 /* Drop packet and reuse the buffer */
448 bd = (struct bcom_fec_bd *)
449 bcom_prepare_next_buffer(priv->rx_dmatsk);
450
451 bd->status = FEC_RX_BUFFER_SIZE;
452 bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
453 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
454
455 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
456
457 dev->stats.rx_dropped++;
458
459 continue;
460 }
461
462 /* skbs are allocated on open, so now we allocate a new one,
463 * and remove the old (with the packet) */
464 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
465 if (skb) {
466 /* Process the received skb */
467 int length = status & BCOM_FEC_RX_BD_LEN_MASK;
468
469 skb_put(rskb, length - 4); /* length without CRC32 */
470
471 rskb->dev = dev;
472 rskb->protocol = eth_type_trans(rskb, dev);
473
474 netif_rx(rskb);
475 dev->last_rx = jiffies;
476 } else {
477 /* Can't get a new one : reuse the same & drop pkt */
478 dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
479 dev->stats.rx_dropped++;
480
481 skb = rskb;
482 }
483
484 bd = (struct bcom_fec_bd *)
485 bcom_prepare_next_buffer(priv->rx_dmatsk);
486
487 bd->status = FEC_RX_BUFFER_SIZE;
488 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
489 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
490
491 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
492 }
493
494 return IRQ_HANDLED;
495 }
496
497 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
498 {
499 struct net_device *dev = dev_id;
500 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
501 struct mpc52xx_fec __iomem *fec = priv->fec;
502 u32 ievent;
503
504 ievent = in_be32(&fec->ievent);
505
506 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
507 if (!ievent)
508 return IRQ_NONE;
509
510 out_be32(&fec->ievent, ievent); /* clear pending events */
511
512 /* on fifo error, soft-reset fec */
513 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
514
515 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
516 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
517 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
518 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
519
520 mpc52xx_fec_reset(dev);
521
522 netif_wake_queue(dev);
523 return IRQ_HANDLED;
524 }
525
526 if (ievent & ~FEC_IEVENT_TFINT)
527 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
528
529 return IRQ_HANDLED;
530 }
531
532 /*
533 * Get the current statistics.
534 * This may be called with the card open or closed.
535 */
536 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
537 {
538 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
539 struct net_device_stats *stats = &dev->stats;
540 struct mpc52xx_fec __iomem *fec = priv->fec;
541
542 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
543 stats->rx_packets = in_be32(&fec->rmon_r_packets);
544 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
545 in_be32(&fec->rmon_r_undersize) +
546 in_be32(&fec->rmon_r_oversize) +
547 in_be32(&fec->rmon_r_frag) +
548 in_be32(&fec->rmon_r_jab);
549
550 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
551 stats->tx_packets = in_be32(&fec->rmon_t_packets);
552 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
553 in_be32(&fec->rmon_t_undersize) +
554 in_be32(&fec->rmon_t_oversize) +
555 in_be32(&fec->rmon_t_frag) +
556 in_be32(&fec->rmon_t_jab);
557
558 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
559 stats->collisions = in_be32(&fec->rmon_t_col);
560
561 /* detailed rx_errors: */
562 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
563 + in_be32(&fec->rmon_r_oversize)
564 + in_be32(&fec->rmon_r_frag)
565 + in_be32(&fec->rmon_r_jab);
566 stats->rx_over_errors = in_be32(&fec->r_macerr);
567 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
568 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
569 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
570 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
571
572 /* detailed tx_errors: */
573 stats->tx_aborted_errors = 0;
574 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
575 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
576 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
577 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
578
579 return stats;
580 }
581
582 /*
583 * Read MIB counters in order to reset them,
584 * then zero all the stats fields in memory
585 */
586 static void mpc52xx_fec_reset_stats(struct net_device *dev)
587 {
588 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
589 struct mpc52xx_fec __iomem *fec = priv->fec;
590
591 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
592 memset_io(&fec->rmon_t_drop, 0,
593 offsetof(struct mpc52xx_fec, reserved10) -
594 offsetof(struct mpc52xx_fec, rmon_t_drop));
595 out_be32(&fec->mib_control, 0);
596
597 memset(&dev->stats, 0, sizeof(dev->stats));
598 }
599
600 /*
601 * Set or clear the multicast filter for this adaptor.
602 */
603 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
604 {
605 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
606 struct mpc52xx_fec __iomem *fec = priv->fec;
607 u32 rx_control;
608
609 rx_control = in_be32(&fec->r_cntrl);
610
611 if (dev->flags & IFF_PROMISC) {
612 rx_control |= FEC_RCNTRL_PROM;
613 out_be32(&fec->r_cntrl, rx_control);
614 } else {
615 rx_control &= ~FEC_RCNTRL_PROM;
616 out_be32(&fec->r_cntrl, rx_control);
617
618 if (dev->flags & IFF_ALLMULTI) {
619 out_be32(&fec->gaddr1, 0xffffffff);
620 out_be32(&fec->gaddr2, 0xffffffff);
621 } else {
622 u32 crc;
623 int i;
624 struct dev_mc_list *dmi;
625 u32 gaddr1 = 0x00000000;
626 u32 gaddr2 = 0x00000000;
627
628 dmi = dev->mc_list;
629 for (i=0; i<dev->mc_count; i++) {
630 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
631 if (crc >= 32)
632 gaddr1 |= 1 << (crc-32);
633 else
634 gaddr2 |= 1 << crc;
635 dmi = dmi->next;
636 }
637 out_be32(&fec->gaddr1, gaddr1);
638 out_be32(&fec->gaddr2, gaddr2);
639 }
640 }
641 }
642
643 /**
644 * mpc52xx_fec_hw_init
645 * @dev: network device
646 *
647 * Setup various hardware setting, only needed once on start
648 */
649 static void mpc52xx_fec_hw_init(struct net_device *dev)
650 {
651 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
652 struct mpc52xx_fec __iomem *fec = priv->fec;
653 int i;
654
655 /* Whack a reset. We should wait for this. */
656 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
657 for (i = 0; i < FEC_RESET_DELAY; ++i) {
658 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
659 break;
660 udelay(1);
661 }
662 if (i == FEC_RESET_DELAY)
663 dev_err(&dev->dev, "FEC Reset timeout!\n");
664
665 /* set pause to 0x20 frames */
666 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
667
668 /* high service request will be deasserted when there's < 7 bytes in fifo
669 * low service request will be deasserted when there's < 4*7 bytes in fifo
670 */
671 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
672 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
673
674 /* alarm when <= x bytes in FIFO */
675 out_be32(&fec->rfifo_alarm, 0x0000030c);
676 out_be32(&fec->tfifo_alarm, 0x00000100);
677
678 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
679 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
680
681 /* enable crc generation */
682 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
683 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
684 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
685
686 /* set phy speed.
687 * this can't be done in phy driver, since it needs to be called
688 * before fec stuff (even on resume) */
689 mpc52xx_fec_phy_hw_init(priv);
690 }
691
692 /**
693 * mpc52xx_fec_start
694 * @dev: network device
695 *
696 * This function is called to start or restart the FEC during a link
697 * change. This happens on fifo errors or when switching between half
698 * and full duplex.
699 */
700 static void mpc52xx_fec_start(struct net_device *dev)
701 {
702 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
703 struct mpc52xx_fec __iomem *fec = priv->fec;
704 u32 rcntrl;
705 u32 tcntrl;
706 u32 tmp;
707
708 /* clear sticky error bits */
709 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
710 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
711 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
712
713 /* FIFOs will reset on mpc52xx_fec_enable */
714 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
715
716 /* Set station address. */
717 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
718
719 mpc52xx_fec_set_multicast_list(dev);
720
721 /* set max frame len, enable flow control, select mii mode */
722 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
723 rcntrl |= FEC_RCNTRL_FCE;
724
725 if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
726 rcntrl |= FEC_RCNTRL_MII_MODE;
727
728 if (priv->duplex == DUPLEX_FULL)
729 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
730 else {
731 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
732 tcntrl = 0;
733 }
734 out_be32(&fec->r_cntrl, rcntrl);
735 out_be32(&fec->x_cntrl, tcntrl);
736
737 /* Clear any outstanding interrupt. */
738 out_be32(&fec->ievent, 0xffffffff);
739
740 /* Enable interrupts we wish to service. */
741 out_be32(&fec->imask, FEC_IMASK_ENABLE);
742
743 /* And last, enable the transmit and receive processing. */
744 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
745 out_be32(&fec->r_des_active, 0x01000000);
746 }
747
748 /**
749 * mpc52xx_fec_stop
750 * @dev: network device
751 *
752 * stop all activity on fec and empty dma buffers
753 */
754 static void mpc52xx_fec_stop(struct net_device *dev)
755 {
756 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
757 struct mpc52xx_fec __iomem *fec = priv->fec;
758 unsigned long timeout;
759
760 /* disable all interrupts */
761 out_be32(&fec->imask, 0);
762
763 /* Disable the rx task. */
764 bcom_disable(priv->rx_dmatsk);
765
766 /* Wait for tx queue to drain, but only if we're in process context */
767 if (!in_interrupt()) {
768 timeout = jiffies + msecs_to_jiffies(2000);
769 while (time_before(jiffies, timeout) &&
770 !bcom_queue_empty(priv->tx_dmatsk))
771 msleep(100);
772
773 if (time_after_eq(jiffies, timeout))
774 dev_err(&dev->dev, "queues didn't drain\n");
775 #if 1
776 if (time_after_eq(jiffies, timeout)) {
777 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
778 priv->tx_dmatsk->index,
779 priv->tx_dmatsk->outdex);
780 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
781 priv->rx_dmatsk->index,
782 priv->rx_dmatsk->outdex);
783 }
784 #endif
785 }
786
787 bcom_disable(priv->tx_dmatsk);
788
789 /* Stop FEC */
790 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
791
792 return;
793 }
794
795 /* reset fec and bestcomm tasks */
796 static void mpc52xx_fec_reset(struct net_device *dev)
797 {
798 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
799 struct mpc52xx_fec __iomem *fec = priv->fec;
800
801 mpc52xx_fec_stop(dev);
802
803 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
804 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
805
806 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
807
808 mpc52xx_fec_hw_init(dev);
809
810 phy_stop(priv->phydev);
811 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
812 phy_start(priv->phydev);
813
814 bcom_fec_rx_reset(priv->rx_dmatsk);
815 bcom_fec_tx_reset(priv->tx_dmatsk);
816
817 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
818
819 bcom_enable(priv->rx_dmatsk);
820 bcom_enable(priv->tx_dmatsk);
821
822 mpc52xx_fec_start(dev);
823 }
824
825
826 /* ethtool interface */
827 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
828 struct ethtool_drvinfo *info)
829 {
830 strcpy(info->driver, DRIVER_NAME);
831 }
832
833 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
834 {
835 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
836 return phy_ethtool_gset(priv->phydev, cmd);
837 }
838
839 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
840 {
841 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
842 return phy_ethtool_sset(priv->phydev, cmd);
843 }
844
845 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
846 {
847 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
848 return priv->msg_enable;
849 }
850
851 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
852 {
853 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
854 priv->msg_enable = level;
855 }
856
857 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
858 .get_drvinfo = mpc52xx_fec_get_drvinfo,
859 .get_settings = mpc52xx_fec_get_settings,
860 .set_settings = mpc52xx_fec_set_settings,
861 .get_link = ethtool_op_get_link,
862 .get_msglevel = mpc52xx_fec_get_msglevel,
863 .set_msglevel = mpc52xx_fec_set_msglevel,
864 };
865
866
867 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
868 {
869 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
870
871 return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
872 }
873
874 /* ======================================================================== */
875 /* OF Driver */
876 /* ======================================================================== */
877
878 static int __devinit
879 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
880 {
881 int rv;
882 struct net_device *ndev;
883 struct mpc52xx_fec_priv *priv = NULL;
884 struct resource mem;
885 struct device_node *phy_node;
886 const phandle *phy_handle;
887 const u32 *prop;
888 int prop_size;
889
890 phys_addr_t rx_fifo;
891 phys_addr_t tx_fifo;
892
893 /* Get the ether ndev & it's private zone */
894 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
895 if (!ndev)
896 return -ENOMEM;
897
898 priv = netdev_priv(ndev);
899
900 /* Reserve FEC control zone */
901 rv = of_address_to_resource(op->node, 0, &mem);
902 if (rv) {
903 printk(KERN_ERR DRIVER_NAME ": "
904 "Error while parsing device node resource\n" );
905 return rv;
906 }
907 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
908 printk(KERN_ERR DRIVER_NAME
909 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
910 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
911 return -EINVAL;
912 }
913
914 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
915 return -EBUSY;
916
917 /* Init ether ndev with what we have */
918 ndev->open = mpc52xx_fec_open;
919 ndev->stop = mpc52xx_fec_close;
920 ndev->hard_start_xmit = mpc52xx_fec_hard_start_xmit;
921 ndev->do_ioctl = mpc52xx_fec_ioctl;
922 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
923 ndev->get_stats = mpc52xx_fec_get_stats;
924 ndev->set_mac_address = mpc52xx_fec_set_mac_address;
925 ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
926 ndev->tx_timeout = mpc52xx_fec_tx_timeout;
927 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
928 ndev->base_addr = mem.start;
929
930 priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
931
932 spin_lock_init(&priv->lock);
933
934 /* ioremap the zones */
935 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
936
937 if (!priv->fec) {
938 rv = -ENOMEM;
939 goto probe_error;
940 }
941
942 /* Bestcomm init */
943 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
944 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
945
946 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
947 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
948
949 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
950 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
951 rv = -ENOMEM;
952 goto probe_error;
953 }
954
955 /* Get the IRQ we need one by one */
956 /* Control */
957 ndev->irq = irq_of_parse_and_map(op->node, 0);
958
959 /* RX */
960 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
961
962 /* TX */
963 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
964
965 /* MAC address init */
966 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
967 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
968 else
969 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
970
971 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
972
973 /*
974 * Link mode configuration
975 */
976
977 /* Start with safe defaults for link connection */
978 priv->phy_addr = FEC5200_PHYADDR_NONE;
979 priv->speed = 100;
980 priv->duplex = DUPLEX_HALF;
981 priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
982
983 /* the 7-wire property means don't use MII mode */
984 if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
985 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
986
987 /* The current speed preconfigures the speed of the MII link */
988 prop = of_get_property(op->node, "current-speed", &prop_size);
989 if (prop && (prop_size >= sizeof(u32) * 2)) {
990 priv->speed = prop[0];
991 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
992 }
993
994 /* If there is a phy handle, setup link to that phy */
995 phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
996 if (phy_handle && (prop_size >= sizeof(phandle))) {
997 phy_node = of_find_node_by_phandle(*phy_handle);
998 prop = of_get_property(phy_node, "reg", &prop_size);
999 if (prop && (prop_size >= sizeof(u32)))
1000 if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1001 priv->phy_addr = *prop;
1002 of_node_put(phy_node);
1003 }
1004
1005 /* Hardware init */
1006 mpc52xx_fec_hw_init(ndev);
1007
1008 mpc52xx_fec_reset_stats(ndev);
1009
1010 SET_NETDEV_DEV(ndev, &op->dev);
1011
1012 /* Register the new network device */
1013 rv = register_netdev(ndev);
1014 if (rv < 0)
1015 goto probe_error;
1016
1017 /* Now report the link setup */
1018 switch (priv->phy_addr) {
1019 case FEC5200_PHYADDR_NONE:
1020 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1021 priv->speed, priv->duplex ? 'F' : 'H');
1022 break;
1023 case FEC5200_PHYADDR_7WIRE:
1024 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1025 break;
1026 default:
1027 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1028 priv->phy_addr);
1029 }
1030
1031 /* We're done ! */
1032 dev_set_drvdata(&op->dev, ndev);
1033
1034 return 0;
1035
1036
1037 /* Error handling - free everything that might be allocated */
1038 probe_error:
1039
1040 irq_dispose_mapping(ndev->irq);
1041
1042 if (priv->rx_dmatsk)
1043 bcom_fec_rx_release(priv->rx_dmatsk);
1044 if (priv->tx_dmatsk)
1045 bcom_fec_tx_release(priv->tx_dmatsk);
1046
1047 if (priv->fec)
1048 iounmap(priv->fec);
1049
1050 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1051
1052 free_netdev(ndev);
1053
1054 return rv;
1055 }
1056
1057 static int
1058 mpc52xx_fec_remove(struct of_device *op)
1059 {
1060 struct net_device *ndev;
1061 struct mpc52xx_fec_priv *priv;
1062
1063 ndev = dev_get_drvdata(&op->dev);
1064 priv = netdev_priv(ndev);
1065
1066 unregister_netdev(ndev);
1067
1068 irq_dispose_mapping(ndev->irq);
1069
1070 bcom_fec_rx_release(priv->rx_dmatsk);
1071 bcom_fec_tx_release(priv->tx_dmatsk);
1072
1073 iounmap(priv->fec);
1074
1075 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1076
1077 free_netdev(ndev);
1078
1079 dev_set_drvdata(&op->dev, NULL);
1080 return 0;
1081 }
1082
1083 #ifdef CONFIG_PM
1084 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1085 {
1086 struct net_device *dev = dev_get_drvdata(&op->dev);
1087
1088 if (netif_running(dev))
1089 mpc52xx_fec_close(dev);
1090
1091 return 0;
1092 }
1093
1094 static int mpc52xx_fec_of_resume(struct of_device *op)
1095 {
1096 struct net_device *dev = dev_get_drvdata(&op->dev);
1097
1098 mpc52xx_fec_hw_init(dev);
1099 mpc52xx_fec_reset_stats(dev);
1100
1101 if (netif_running(dev))
1102 mpc52xx_fec_open(dev);
1103
1104 return 0;
1105 }
1106 #endif
1107
1108 static struct of_device_id mpc52xx_fec_match[] = {
1109 { .type = "network", .compatible = "fsl,mpc5200b-fec", },
1110 { .type = "network", .compatible = "fsl,mpc5200-fec", },
1111 { .type = "network", .compatible = "mpc5200-fec", },
1112 { }
1113 };
1114
1115 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1116
1117 static struct of_platform_driver mpc52xx_fec_driver = {
1118 .owner = THIS_MODULE,
1119 .name = DRIVER_NAME,
1120 .match_table = mpc52xx_fec_match,
1121 .probe = mpc52xx_fec_probe,
1122 .remove = mpc52xx_fec_remove,
1123 #ifdef CONFIG_PM
1124 .suspend = mpc52xx_fec_of_suspend,
1125 .resume = mpc52xx_fec_of_resume,
1126 #endif
1127 };
1128
1129
1130 /* ======================================================================== */
1131 /* Module */
1132 /* ======================================================================== */
1133
1134 static int __init
1135 mpc52xx_fec_init(void)
1136 {
1137 #ifdef CONFIG_FEC_MPC52xx_MDIO
1138 int ret;
1139 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1140 if (ret) {
1141 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1142 return ret;
1143 }
1144 #endif
1145 return of_register_platform_driver(&mpc52xx_fec_driver);
1146 }
1147
1148 static void __exit
1149 mpc52xx_fec_exit(void)
1150 {
1151 of_unregister_platform_driver(&mpc52xx_fec_driver);
1152 #ifdef CONFIG_FEC_MPC52xx_MDIO
1153 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1154 #endif
1155 }
1156
1157
1158 module_init(mpc52xx_fec_init);
1159 module_exit(mpc52xx_fec_exit);
1160
1161 MODULE_LICENSE("GPL");
1162 MODULE_AUTHOR("Dale Farnsworth");
1163 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
x86 "subsystem" repository