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ASoC: Fix handling of bias levels for non-DAPM codecs
[linux/fpc-iii.git] / drivers / net / fec_mpc52xx.c
blobcc786333d95c87cd84d34a1b189c43f9b60367c1
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_mdio.h>
29 #include <linux/of_platform.h>
30
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/ethtool.h>
34 #include <linux/skbuff.h>
35
36 #include <asm/io.h>
37 #include <asm/delay.h>
38 #include <asm/mpc52xx.h>
39
40 #include <sysdev/bestcomm/bestcomm.h>
41 #include <sysdev/bestcomm/fec.h>
42
43 #include "fec_mpc52xx.h"
44
45 #define DRIVER_NAME "mpc52xx-fec"
46
47 /* Private driver data structure */
48 struct mpc52xx_fec_priv {
49 struct net_device *ndev;
50 int duplex;
51 int speed;
52 int r_irq;
53 int t_irq;
54 struct mpc52xx_fec __iomem *fec;
55 struct bcom_task *rx_dmatsk;
56 struct bcom_task *tx_dmatsk;
57 spinlock_t lock;
58 int msg_enable;
59
60 /* MDIO link details */
61 unsigned int mdio_speed;
62 struct device_node *phy_node;
63 struct phy_device *phydev;
64 enum phy_state link;
65 int seven_wire_mode;
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.parent, bd->skb_pa, skb->len,
133 DMA_FROM_DEVICE);
134 kfree_skb(skb);
135 }
136 }
137
138 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
139 {
140 while (!bcom_queue_full(rxtsk)) {
141 struct sk_buff *skb;
142 struct bcom_fec_bd *bd;
143
144 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
145 if (skb == NULL)
146 return -EAGAIN;
147
148 /* zero out the initial receive buffers to aid debugging */
149 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
150
151 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
152
153 bd->status = FEC_RX_BUFFER_SIZE;
154 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
155 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
156
157 bcom_submit_next_buffer(rxtsk, skb);
158 }
159
160 return 0;
161 }
162
163 /* based on generic_adjust_link from fs_enet-main.c */
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 = priv->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; /* FD enable */
186 else
187 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
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 int err = -EBUSY;
218
219 if (priv->phy_node) {
220 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
221 mpc52xx_fec_adjust_link, 0, 0);
222 if (!priv->phydev) {
223 dev_err(&dev->dev, "of_phy_connect failed\n");
224 return -ENODEV;
225 }
226 phy_start(priv->phydev);
227 }
228
229 if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
230 DRIVER_NAME "_ctrl", dev)) {
231 dev_err(&dev->dev, "ctrl interrupt request failed\n");
232 goto free_phy;
233 }
234 if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
235 DRIVER_NAME "_rx", dev)) {
236 dev_err(&dev->dev, "rx interrupt request failed\n");
237 goto free_ctrl_irq;
238 }
239 if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
240 DRIVER_NAME "_tx", dev)) {
241 dev_err(&dev->dev, "tx interrupt request failed\n");
242 goto free_2irqs;
243 }
244
245 bcom_fec_rx_reset(priv->rx_dmatsk);
246 bcom_fec_tx_reset(priv->tx_dmatsk);
247
248 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
249 if (err) {
250 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
251 goto free_irqs;
252 }
253
254 bcom_enable(priv->rx_dmatsk);
255 bcom_enable(priv->tx_dmatsk);
256
257 mpc52xx_fec_start(dev);
258
259 netif_start_queue(dev);
260
261 return 0;
262
263 free_irqs:
264 free_irq(priv->t_irq, dev);
265 free_2irqs:
266 free_irq(priv->r_irq, dev);
267 free_ctrl_irq:
268 free_irq(dev->irq, dev);
269 free_phy:
270 if (priv->phydev) {
271 phy_stop(priv->phydev);
272 phy_disconnect(priv->phydev);
273 priv->phydev = NULL;
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
283 netif_stop_queue(dev);
284
285 mpc52xx_fec_stop(dev);
286
287 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
288
289 free_irq(dev->irq, dev);
290 free_irq(priv->r_irq, dev);
291 free_irq(priv->t_irq, dev);
292
293 if (priv->phydev) {
294 /* power down phy */
295 phy_stop(priv->phydev);
296 phy_disconnect(priv->phydev);
297 priv->phydev = NULL;
298 }
299
300 return 0;
301 }
302
303 /* This will only be invoked if your driver is _not_ in XOFF state.
304 * What this means is that you need not check it, and that this
305 * invariant will hold if you make sure that the netif_*_queue()
306 * calls are done at the proper times.
307 */
308 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
309 {
310 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
311 struct bcom_fec_bd *bd;
312
313 if (bcom_queue_full(priv->tx_dmatsk)) {
314 if (net_ratelimit())
315 dev_err(&dev->dev, "transmit queue overrun\n");
316 return NETDEV_TX_BUSY;
317 }
318
319 spin_lock_irq(&priv->lock);
320 dev->trans_start = jiffies;
321
322 bd = (struct bcom_fec_bd *)
323 bcom_prepare_next_buffer(priv->tx_dmatsk);
324
325 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
326 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
327 DMA_TO_DEVICE);
328
329 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
330
331 if (bcom_queue_full(priv->tx_dmatsk)) {
332 netif_stop_queue(dev);
333 }
334
335 spin_unlock_irq(&priv->lock);
336
337 return NETDEV_TX_OK;
338 }
339
340 #ifdef CONFIG_NET_POLL_CONTROLLER
341 static void mpc52xx_fec_poll_controller(struct net_device *dev)
342 {
343 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
344
345 disable_irq(priv->t_irq);
346 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
347 enable_irq(priv->t_irq);
348 disable_irq(priv->r_irq);
349 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
350 enable_irq(priv->r_irq);
351 }
352 #endif
353
354
355 /* This handles BestComm transmit task interrupts
356 */
357 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
358 {
359 struct net_device *dev = dev_id;
360 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
361
362 spin_lock(&priv->lock);
363
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_kfree_skb_irq(skb);
373 }
374
375 netif_wake_queue(dev);
376
377 spin_unlock(&priv->lock);
378
379 return IRQ_HANDLED;
380 }
381
382 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
383 {
384 struct net_device *dev = dev_id;
385 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
386
387 while (bcom_buffer_done(priv->rx_dmatsk)) {
388 struct sk_buff *skb;
389 struct sk_buff *rskb;
390 struct bcom_fec_bd *bd;
391 u32 status;
392
393 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
394 (struct bcom_bd **)&bd);
395 dma_unmap_single(dev->dev.parent, bd->skb_pa, rskb->len,
396 DMA_FROM_DEVICE);
397
398 /* Test for errors in received frame */
399 if (status & BCOM_FEC_RX_BD_ERRORS) {
400 /* Drop packet and reuse the buffer */
401 bd = (struct bcom_fec_bd *)
402 bcom_prepare_next_buffer(priv->rx_dmatsk);
403
404 bd->status = FEC_RX_BUFFER_SIZE;
405 bd->skb_pa = dma_map_single(dev->dev.parent,
406 rskb->data,
407 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
408
409 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
410
411 dev->stats.rx_dropped++;
412
413 continue;
414 }
415
416 /* skbs are allocated on open, so now we allocate a new one,
417 * and remove the old (with the packet) */
418 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
419 if (skb) {
420 /* Process the received skb */
421 int length = status & BCOM_FEC_RX_BD_LEN_MASK;
422
423 skb_put(rskb, length - 4); /* length without CRC32 */
424
425 rskb->dev = dev;
426 rskb->protocol = eth_type_trans(rskb, dev);
427
428 netif_rx(rskb);
429 } else {
430 /* Can't get a new one : reuse the same & drop pkt */
431 dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
432 dev->stats.rx_dropped++;
433
434 skb = rskb;
435 }
436
437 bd = (struct bcom_fec_bd *)
438 bcom_prepare_next_buffer(priv->rx_dmatsk);
439
440 bd->status = FEC_RX_BUFFER_SIZE;
441 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
442 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
443
444 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
445 }
446
447 return IRQ_HANDLED;
448 }
449
450 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
451 {
452 struct net_device *dev = dev_id;
453 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
454 struct mpc52xx_fec __iomem *fec = priv->fec;
455 u32 ievent;
456
457 ievent = in_be32(&fec->ievent);
458
459 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
460 if (!ievent)
461 return IRQ_NONE;
462
463 out_be32(&fec->ievent, ievent); /* clear pending events */
464
465 /* on fifo error, soft-reset fec */
466 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
467
468 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
469 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
470 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
471 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
472
473 mpc52xx_fec_reset(dev);
474
475 netif_wake_queue(dev);
476 return IRQ_HANDLED;
477 }
478
479 if (ievent & ~FEC_IEVENT_TFINT)
480 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
481
482 return IRQ_HANDLED;
483 }
484
485 /*
486 * Get the current statistics.
487 * This may be called with the card open or closed.
488 */
489 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
490 {
491 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
492 struct net_device_stats *stats = &dev->stats;
493 struct mpc52xx_fec __iomem *fec = priv->fec;
494
495 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
496 stats->rx_packets = in_be32(&fec->rmon_r_packets);
497 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
498 in_be32(&fec->rmon_r_undersize) +
499 in_be32(&fec->rmon_r_oversize) +
500 in_be32(&fec->rmon_r_frag) +
501 in_be32(&fec->rmon_r_jab);
502
503 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
504 stats->tx_packets = in_be32(&fec->rmon_t_packets);
505 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
506 in_be32(&fec->rmon_t_undersize) +
507 in_be32(&fec->rmon_t_oversize) +
508 in_be32(&fec->rmon_t_frag) +
509 in_be32(&fec->rmon_t_jab);
510
511 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
512 stats->collisions = in_be32(&fec->rmon_t_col);
513
514 /* detailed rx_errors: */
515 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
516 + in_be32(&fec->rmon_r_oversize)
517 + in_be32(&fec->rmon_r_frag)
518 + in_be32(&fec->rmon_r_jab);
519 stats->rx_over_errors = in_be32(&fec->r_macerr);
520 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
521 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
522 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
523 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
524
525 /* detailed tx_errors: */
526 stats->tx_aborted_errors = 0;
527 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
528 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
529 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
530 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
531
532 return stats;
533 }
534
535 /*
536 * Read MIB counters in order to reset them,
537 * then zero all the stats fields in memory
538 */
539 static void mpc52xx_fec_reset_stats(struct net_device *dev)
540 {
541 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
542 struct mpc52xx_fec __iomem *fec = priv->fec;
543
544 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
545 memset_io(&fec->rmon_t_drop, 0,
546 offsetof(struct mpc52xx_fec, reserved10) -
547 offsetof(struct mpc52xx_fec, rmon_t_drop));
548 out_be32(&fec->mib_control, 0);
549
550 memset(&dev->stats, 0, sizeof(dev->stats));
551 }
552
553 /*
554 * Set or clear the multicast filter for this adaptor.
555 */
556 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
557 {
558 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
559 struct mpc52xx_fec __iomem *fec = priv->fec;
560 u32 rx_control;
561
562 rx_control = in_be32(&fec->r_cntrl);
563
564 if (dev->flags & IFF_PROMISC) {
565 rx_control |= FEC_RCNTRL_PROM;
566 out_be32(&fec->r_cntrl, rx_control);
567 } else {
568 rx_control &= ~FEC_RCNTRL_PROM;
569 out_be32(&fec->r_cntrl, rx_control);
570
571 if (dev->flags & IFF_ALLMULTI) {
572 out_be32(&fec->gaddr1, 0xffffffff);
573 out_be32(&fec->gaddr2, 0xffffffff);
574 } else {
575 u32 crc;
576 int i;
577 struct dev_mc_list *dmi;
578 u32 gaddr1 = 0x00000000;
579 u32 gaddr2 = 0x00000000;
580
581 dmi = dev->mc_list;
582 for (i=0; i<dev->mc_count; i++) {
583 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
584 if (crc >= 32)
585 gaddr1 |= 1 << (crc-32);
586 else
587 gaddr2 |= 1 << crc;
588 dmi = dmi->next;
589 }
590 out_be32(&fec->gaddr1, gaddr1);
591 out_be32(&fec->gaddr2, gaddr2);
592 }
593 }
594 }
595
596 /**
597 * mpc52xx_fec_hw_init
598 * @dev: network device
599 *
600 * Setup various hardware setting, only needed once on start
601 */
602 static void mpc52xx_fec_hw_init(struct net_device *dev)
603 {
604 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
605 struct mpc52xx_fec __iomem *fec = priv->fec;
606 int i;
607
608 /* Whack a reset. We should wait for this. */
609 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
610 for (i = 0; i < FEC_RESET_DELAY; ++i) {
611 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
612 break;
613 udelay(1);
614 }
615 if (i == FEC_RESET_DELAY)
616 dev_err(&dev->dev, "FEC Reset timeout!\n");
617
618 /* set pause to 0x20 frames */
619 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
620
621 /* high service request will be deasserted when there's < 7 bytes in fifo
622 * low service request will be deasserted when there's < 4*7 bytes in fifo
623 */
624 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
625 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
626
627 /* alarm when <= x bytes in FIFO */
628 out_be32(&fec->rfifo_alarm, 0x0000030c);
629 out_be32(&fec->tfifo_alarm, 0x00000100);
630
631 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
632 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
633
634 /* enable crc generation */
635 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
636 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
637 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
638
639 /* set phy speed.
640 * this can't be done in phy driver, since it needs to be called
641 * before fec stuff (even on resume) */
642 out_be32(&fec->mii_speed, priv->mdio_speed);
643 }
644
645 /**
646 * mpc52xx_fec_start
647 * @dev: network device
648 *
649 * This function is called to start or restart the FEC during a link
650 * change. This happens on fifo errors or when switching between half
651 * and full duplex.
652 */
653 static void mpc52xx_fec_start(struct net_device *dev)
654 {
655 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
656 struct mpc52xx_fec __iomem *fec = priv->fec;
657 u32 rcntrl;
658 u32 tcntrl;
659 u32 tmp;
660
661 /* clear sticky error bits */
662 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
663 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
664 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
665
666 /* FIFOs will reset on mpc52xx_fec_enable */
667 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
668
669 /* Set station address. */
670 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
671
672 mpc52xx_fec_set_multicast_list(dev);
673
674 /* set max frame len, enable flow control, select mii mode */
675 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
676 rcntrl |= FEC_RCNTRL_FCE;
677
678 if (!priv->seven_wire_mode)
679 rcntrl |= FEC_RCNTRL_MII_MODE;
680
681 if (priv->duplex == DUPLEX_FULL)
682 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
683 else {
684 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
685 tcntrl = 0;
686 }
687 out_be32(&fec->r_cntrl, rcntrl);
688 out_be32(&fec->x_cntrl, tcntrl);
689
690 /* Clear any outstanding interrupt. */
691 out_be32(&fec->ievent, 0xffffffff);
692
693 /* Enable interrupts we wish to service. */
694 out_be32(&fec->imask, FEC_IMASK_ENABLE);
695
696 /* And last, enable the transmit and receive processing. */
697 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
698 out_be32(&fec->r_des_active, 0x01000000);
699 }
700
701 /**
702 * mpc52xx_fec_stop
703 * @dev: network device
704 *
705 * stop all activity on fec and empty dma buffers
706 */
707 static void mpc52xx_fec_stop(struct net_device *dev)
708 {
709 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
710 struct mpc52xx_fec __iomem *fec = priv->fec;
711 unsigned long timeout;
712
713 /* disable all interrupts */
714 out_be32(&fec->imask, 0);
715
716 /* Disable the rx task. */
717 bcom_disable(priv->rx_dmatsk);
718
719 /* Wait for tx queue to drain, but only if we're in process context */
720 if (!in_interrupt()) {
721 timeout = jiffies + msecs_to_jiffies(2000);
722 while (time_before(jiffies, timeout) &&
723 !bcom_queue_empty(priv->tx_dmatsk))
724 msleep(100);
725
726 if (time_after_eq(jiffies, timeout))
727 dev_err(&dev->dev, "queues didn't drain\n");
728 #if 1
729 if (time_after_eq(jiffies, timeout)) {
730 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
731 priv->tx_dmatsk->index,
732 priv->tx_dmatsk->outdex);
733 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
734 priv->rx_dmatsk->index,
735 priv->rx_dmatsk->outdex);
736 }
737 #endif
738 }
739
740 bcom_disable(priv->tx_dmatsk);
741
742 /* Stop FEC */
743 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
744 }
745
746 /* reset fec and bestcomm tasks */
747 static void mpc52xx_fec_reset(struct net_device *dev)
748 {
749 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
750 struct mpc52xx_fec __iomem *fec = priv->fec;
751
752 mpc52xx_fec_stop(dev);
753
754 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
755 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
756
757 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
758
759 mpc52xx_fec_hw_init(dev);
760
761 if (priv->phydev) {
762 phy_stop(priv->phydev);
763 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
764 phy_start(priv->phydev);
765 }
766
767 bcom_fec_rx_reset(priv->rx_dmatsk);
768 bcom_fec_tx_reset(priv->tx_dmatsk);
769
770 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
771
772 bcom_enable(priv->rx_dmatsk);
773 bcom_enable(priv->tx_dmatsk);
774
775 mpc52xx_fec_start(dev);
776 }
777
778
779 /* ethtool interface */
780 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
781 struct ethtool_drvinfo *info)
782 {
783 strcpy(info->driver, DRIVER_NAME);
784 }
785
786 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
787 {
788 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
789
790 if (!priv->phydev)
791 return -ENODEV;
792
793 return phy_ethtool_gset(priv->phydev, cmd);
794 }
795
796 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
797 {
798 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
799
800 if (!priv->phydev)
801 return -ENODEV;
802
803 return phy_ethtool_sset(priv->phydev, cmd);
804 }
805
806 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
807 {
808 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
809 return priv->msg_enable;
810 }
811
812 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
813 {
814 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
815 priv->msg_enable = level;
816 }
817
818 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
819 .get_drvinfo = mpc52xx_fec_get_drvinfo,
820 .get_settings = mpc52xx_fec_get_settings,
821 .set_settings = mpc52xx_fec_set_settings,
822 .get_link = ethtool_op_get_link,
823 .get_msglevel = mpc52xx_fec_get_msglevel,
824 .set_msglevel = mpc52xx_fec_set_msglevel,
825 };
826
827
828 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
829 {
830 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
831
832 if (!priv->phydev)
833 return -ENOTSUPP;
834
835 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
836 }
837
838 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
839 .ndo_open = mpc52xx_fec_open,
840 .ndo_stop = mpc52xx_fec_close,
841 .ndo_start_xmit = mpc52xx_fec_start_xmit,
842 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
843 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
844 .ndo_validate_addr = eth_validate_addr,
845 .ndo_do_ioctl = mpc52xx_fec_ioctl,
846 .ndo_change_mtu = eth_change_mtu,
847 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
848 .ndo_get_stats = mpc52xx_fec_get_stats,
849 #ifdef CONFIG_NET_POLL_CONTROLLER
850 .ndo_poll_controller = mpc52xx_fec_poll_controller,
851 #endif
852 };
853
854 /* ======================================================================== */
855 /* OF Driver */
856 /* ======================================================================== */
857
858 static int __devinit
859 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
860 {
861 int rv;
862 struct net_device *ndev;
863 struct mpc52xx_fec_priv *priv = NULL;
864 struct resource mem;
865 const u32 *prop;
866 int prop_size;
867
868 phys_addr_t rx_fifo;
869 phys_addr_t tx_fifo;
870
871 /* Get the ether ndev & it's private zone */
872 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
873 if (!ndev)
874 return -ENOMEM;
875
876 priv = netdev_priv(ndev);
877 priv->ndev = ndev;
878
879 /* Reserve FEC control zone */
880 rv = of_address_to_resource(op->node, 0, &mem);
881 if (rv) {
882 printk(KERN_ERR DRIVER_NAME ": "
883 "Error while parsing device node resource\n" );
884 return rv;
885 }
886 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
887 printk(KERN_ERR DRIVER_NAME
888 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
889 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
890 return -EINVAL;
891 }
892
893 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
894 return -EBUSY;
895
896 /* Init ether ndev with what we have */
897 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
898 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
899 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
900 ndev->base_addr = mem.start;
901 SET_NETDEV_DEV(ndev, &op->dev);
902
903 spin_lock_init(&priv->lock);
904
905 /* ioremap the zones */
906 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
907
908 if (!priv->fec) {
909 rv = -ENOMEM;
910 goto probe_error;
911 }
912
913 /* Bestcomm init */
914 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
915 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
916
917 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
918 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
919
920 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
921 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
922 rv = -ENOMEM;
923 goto probe_error;
924 }
925
926 /* Get the IRQ we need one by one */
927 /* Control */
928 ndev->irq = irq_of_parse_and_map(op->node, 0);
929
930 /* RX */
931 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
932
933 /* TX */
934 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
935
936 /* MAC address init */
937 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
938 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
939 else
940 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
941
942 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
943
944 /*
945 * Link mode configuration
946 */
947
948 /* Start with safe defaults for link connection */
949 priv->speed = 100;
950 priv->duplex = DUPLEX_HALF;
951 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
952
953 /* The current speed preconfigures the speed of the MII link */
954 prop = of_get_property(op->node, "current-speed", &prop_size);
955 if (prop && (prop_size >= sizeof(u32) * 2)) {
956 priv->speed = prop[0];
957 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
958 }
959
960 /* If there is a phy handle, then get the PHY node */
961 priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
962
963 /* the 7-wire property means don't use MII mode */
964 if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) {
965 priv->seven_wire_mode = 1;
966 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
967 }
968
969 /* Hardware init */
970 mpc52xx_fec_hw_init(ndev);
971 mpc52xx_fec_reset_stats(ndev);
972
973 rv = register_netdev(ndev);
974 if (rv < 0)
975 goto probe_error;
976
977 /* We're done ! */
978 dev_set_drvdata(&op->dev, ndev);
979
980 return 0;
981
982
983 /* Error handling - free everything that might be allocated */
984 probe_error:
985
986 if (priv->phy_node)
987 of_node_put(priv->phy_node);
988 priv->phy_node = NULL;
989
990 irq_dispose_mapping(ndev->irq);
991
992 if (priv->rx_dmatsk)
993 bcom_fec_rx_release(priv->rx_dmatsk);
994 if (priv->tx_dmatsk)
995 bcom_fec_tx_release(priv->tx_dmatsk);
996
997 if (priv->fec)
998 iounmap(priv->fec);
999
1000 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1001
1002 free_netdev(ndev);
1003
1004 return rv;
1005 }
1006
1007 static int
1008 mpc52xx_fec_remove(struct of_device *op)
1009 {
1010 struct net_device *ndev;
1011 struct mpc52xx_fec_priv *priv;
1012
1013 ndev = dev_get_drvdata(&op->dev);
1014 priv = netdev_priv(ndev);
1015
1016 unregister_netdev(ndev);
1017
1018 if (priv->phy_node)
1019 of_node_put(priv->phy_node);
1020 priv->phy_node = NULL;
1021
1022 irq_dispose_mapping(ndev->irq);
1023
1024 bcom_fec_rx_release(priv->rx_dmatsk);
1025 bcom_fec_tx_release(priv->tx_dmatsk);
1026
1027 iounmap(priv->fec);
1028
1029 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1030
1031 free_netdev(ndev);
1032
1033 dev_set_drvdata(&op->dev, NULL);
1034 return 0;
1035 }
1036
1037 #ifdef CONFIG_PM
1038 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1039 {
1040 struct net_device *dev = dev_get_drvdata(&op->dev);
1041
1042 if (netif_running(dev))
1043 mpc52xx_fec_close(dev);
1044
1045 return 0;
1046 }
1047
1048 static int mpc52xx_fec_of_resume(struct of_device *op)
1049 {
1050 struct net_device *dev = dev_get_drvdata(&op->dev);
1051
1052 mpc52xx_fec_hw_init(dev);
1053 mpc52xx_fec_reset_stats(dev);
1054
1055 if (netif_running(dev))
1056 mpc52xx_fec_open(dev);
1057
1058 return 0;
1059 }
1060 #endif
1061
1062 static struct of_device_id mpc52xx_fec_match[] = {
1063 { .compatible = "fsl,mpc5200b-fec", },
1064 { .compatible = "fsl,mpc5200-fec", },
1065 { .compatible = "mpc5200-fec", },
1066 { }
1067 };
1068
1069 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1070
1071 static struct of_platform_driver mpc52xx_fec_driver = {
1072 .owner = THIS_MODULE,
1073 .name = DRIVER_NAME,
1074 .match_table = mpc52xx_fec_match,
1075 .probe = mpc52xx_fec_probe,
1076 .remove = mpc52xx_fec_remove,
1077 #ifdef CONFIG_PM
1078 .suspend = mpc52xx_fec_of_suspend,
1079 .resume = mpc52xx_fec_of_resume,
1080 #endif
1081 };
1082
1083
1084 /* ======================================================================== */
1085 /* Module */
1086 /* ======================================================================== */
1087
1088 static int __init
1089 mpc52xx_fec_init(void)
1090 {
1091 #ifdef CONFIG_FEC_MPC52xx_MDIO
1092 int ret;
1093 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1094 if (ret) {
1095 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1096 return ret;
1097 }
1098 #endif
1099 return of_register_platform_driver(&mpc52xx_fec_driver);
1100 }
1101
1102 static void __exit
1103 mpc52xx_fec_exit(void)
1104 {
1105 of_unregister_platform_driver(&mpc52xx_fec_driver);
1106 #ifdef CONFIG_FEC_MPC52xx_MDIO
1107 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1108 #endif
1109 }
1110
1111
1112 module_init(mpc52xx_fec_init);
1113 module_exit(mpc52xx_fec_exit);
1114
1115 MODULE_LICENSE("GPL");
1116 MODULE_AUTHOR("Dale Farnsworth");
1117 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
Linux with added FPC-III support