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ASoC: Avoid wraparound in wm_hubs DC servo correction
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / fec_mpc52xx.c
blob0dbd7219bbde2fa067134666cab69bc37325a147
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 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
89 unsigned long flags;
90
91 dev_warn(&dev->dev, "transmit timed out\n");
92
93 spin_lock_irqsave(&priv->lock, flags);
94 mpc52xx_fec_reset(dev);
95 dev->stats.tx_errors++;
96 spin_unlock_irqrestore(&priv->lock, flags);
97
98 netif_wake_queue(dev);
99 }
100
101 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
102 {
103 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
104 struct mpc52xx_fec __iomem *fec = priv->fec;
105
106 out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
107 out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
108 }
109
110 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
111 {
112 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
113 struct mpc52xx_fec __iomem *fec = priv->fec;
114
115 *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
116 *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
117 }
118
119 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
120 {
121 struct sockaddr *sock = addr;
122
123 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
124
125 mpc52xx_fec_set_paddr(dev, sock->sa_data);
126 return 0;
127 }
128
129 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
130 {
131 while (!bcom_queue_empty(s)) {
132 struct bcom_fec_bd *bd;
133 struct sk_buff *skb;
134
135 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
136 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
137 DMA_FROM_DEVICE);
138 kfree_skb(skb);
139 }
140 }
141
142 static void
143 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
144 {
145 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
146 struct bcom_fec_bd *bd;
147
148 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
149 bd->status = FEC_RX_BUFFER_SIZE;
150 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
151 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
152 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
153 }
154
155 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
156 {
157 struct sk_buff *skb;
158
159 while (!bcom_queue_full(rxtsk)) {
160 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
161 if (!skb)
162 return -EAGAIN;
163
164 /* zero out the initial receive buffers to aid debugging */
165 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
166 mpc52xx_fec_rx_submit(dev, skb);
167 }
168 return 0;
169 }
170
171 /* based on generic_adjust_link from fs_enet-main.c */
172 static void mpc52xx_fec_adjust_link(struct net_device *dev)
173 {
174 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
175 struct phy_device *phydev = priv->phydev;
176 int new_state = 0;
177
178 if (phydev->link != PHY_DOWN) {
179 if (phydev->duplex != priv->duplex) {
180 struct mpc52xx_fec __iomem *fec = priv->fec;
181 u32 rcntrl;
182 u32 tcntrl;
183
184 new_state = 1;
185 priv->duplex = phydev->duplex;
186
187 rcntrl = in_be32(&fec->r_cntrl);
188 tcntrl = in_be32(&fec->x_cntrl);
189
190 rcntrl &= ~FEC_RCNTRL_DRT;
191 tcntrl &= ~FEC_TCNTRL_FDEN;
192 if (phydev->duplex == DUPLEX_FULL)
193 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
194 else
195 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
196
197 out_be32(&fec->r_cntrl, rcntrl);
198 out_be32(&fec->x_cntrl, tcntrl);
199 }
200
201 if (phydev->speed != priv->speed) {
202 new_state = 1;
203 priv->speed = phydev->speed;
204 }
205
206 if (priv->link == PHY_DOWN) {
207 new_state = 1;
208 priv->link = phydev->link;
209 }
210
211 } else if (priv->link) {
212 new_state = 1;
213 priv->link = PHY_DOWN;
214 priv->speed = 0;
215 priv->duplex = -1;
216 }
217
218 if (new_state && netif_msg_link(priv))
219 phy_print_status(phydev);
220 }
221
222 static int mpc52xx_fec_open(struct net_device *dev)
223 {
224 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
225 int err = -EBUSY;
226
227 if (priv->phy_node) {
228 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
229 mpc52xx_fec_adjust_link, 0, 0);
230 if (!priv->phydev) {
231 dev_err(&dev->dev, "of_phy_connect failed\n");
232 return -ENODEV;
233 }
234 phy_start(priv->phydev);
235 }
236
237 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
238 DRIVER_NAME "_ctrl", dev)) {
239 dev_err(&dev->dev, "ctrl interrupt request failed\n");
240 goto free_phy;
241 }
242 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
243 DRIVER_NAME "_rx", dev)) {
244 dev_err(&dev->dev, "rx interrupt request failed\n");
245 goto free_ctrl_irq;
246 }
247 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
248 DRIVER_NAME "_tx", dev)) {
249 dev_err(&dev->dev, "tx interrupt request failed\n");
250 goto free_2irqs;
251 }
252
253 bcom_fec_rx_reset(priv->rx_dmatsk);
254 bcom_fec_tx_reset(priv->tx_dmatsk);
255
256 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
257 if (err) {
258 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
259 goto free_irqs;
260 }
261
262 bcom_enable(priv->rx_dmatsk);
263 bcom_enable(priv->tx_dmatsk);
264
265 mpc52xx_fec_start(dev);
266
267 netif_start_queue(dev);
268
269 return 0;
270
271 free_irqs:
272 free_irq(priv->t_irq, dev);
273 free_2irqs:
274 free_irq(priv->r_irq, dev);
275 free_ctrl_irq:
276 free_irq(dev->irq, dev);
277 free_phy:
278 if (priv->phydev) {
279 phy_stop(priv->phydev);
280 phy_disconnect(priv->phydev);
281 priv->phydev = NULL;
282 }
283
284 return err;
285 }
286
287 static int mpc52xx_fec_close(struct net_device *dev)
288 {
289 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
290
291 netif_stop_queue(dev);
292
293 mpc52xx_fec_stop(dev);
294
295 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
296
297 free_irq(dev->irq, dev);
298 free_irq(priv->r_irq, dev);
299 free_irq(priv->t_irq, dev);
300
301 if (priv->phydev) {
302 /* power down phy */
303 phy_stop(priv->phydev);
304 phy_disconnect(priv->phydev);
305 priv->phydev = NULL;
306 }
307
308 return 0;
309 }
310
311 /* This will only be invoked if your driver is _not_ in XOFF state.
312 * What this means is that you need not check it, and that this
313 * invariant will hold if you make sure that the netif_*_queue()
314 * calls are done at the proper times.
315 */
316 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
317 {
318 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
319 struct bcom_fec_bd *bd;
320 unsigned long flags;
321
322 if (bcom_queue_full(priv->tx_dmatsk)) {
323 if (net_ratelimit())
324 dev_err(&dev->dev, "transmit queue overrun\n");
325 return NETDEV_TX_BUSY;
326 }
327
328 spin_lock_irqsave(&priv->lock, flags);
329 dev->trans_start = jiffies;
330
331 bd = (struct bcom_fec_bd *)
332 bcom_prepare_next_buffer(priv->tx_dmatsk);
333
334 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
335 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
336 DMA_TO_DEVICE);
337
338 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
339 spin_unlock_irqrestore(&priv->lock, flags);
340
341 if (bcom_queue_full(priv->tx_dmatsk)) {
342 netif_stop_queue(dev);
343 }
344
345 return NETDEV_TX_OK;
346 }
347
348 #ifdef CONFIG_NET_POLL_CONTROLLER
349 static void mpc52xx_fec_poll_controller(struct net_device *dev)
350 {
351 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
352
353 disable_irq(priv->t_irq);
354 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
355 enable_irq(priv->t_irq);
356 disable_irq(priv->r_irq);
357 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
358 enable_irq(priv->r_irq);
359 }
360 #endif
361
362
363 /* This handles BestComm transmit task interrupts
364 */
365 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
366 {
367 struct net_device *dev = dev_id;
368 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
369 unsigned long flags;
370
371 spin_lock_irqsave(&priv->lock, flags);
372 while (bcom_buffer_done(priv->tx_dmatsk)) {
373 struct sk_buff *skb;
374 struct bcom_fec_bd *bd;
375 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
376 (struct bcom_bd **)&bd);
377 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
378 DMA_TO_DEVICE);
379
380 dev_kfree_skb_irq(skb);
381 }
382 spin_unlock_irqrestore(&priv->lock, flags);
383
384 netif_wake_queue(dev);
385
386 return IRQ_HANDLED;
387 }
388
389 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
390 {
391 struct net_device *dev = dev_id;
392 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
393 struct sk_buff *rskb; /* received sk_buff */
394 struct sk_buff *skb; /* new sk_buff to enqueue in its place */
395 struct bcom_fec_bd *bd;
396 u32 status, physaddr;
397 int length;
398 unsigned long flags;
399
400 spin_lock_irqsave(&priv->lock, flags);
401
402 while (bcom_buffer_done(priv->rx_dmatsk)) {
403
404 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
405 (struct bcom_bd **)&bd);
406 physaddr = bd->skb_pa;
407
408 /* Test for errors in received frame */
409 if (status & BCOM_FEC_RX_BD_ERRORS) {
410 /* Drop packet and reuse the buffer */
411 mpc52xx_fec_rx_submit(dev, rskb);
412 dev->stats.rx_dropped++;
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 /* Can't get a new one : reuse the same & drop pkt */
421 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
422 mpc52xx_fec_rx_submit(dev, rskb);
423 dev->stats.rx_dropped++;
424 continue;
425 }
426
427 /* Enqueue the new sk_buff back on the hardware */
428 mpc52xx_fec_rx_submit(dev, skb);
429
430 /* Process the received skb - Drop the spin lock while
431 * calling into the network stack */
432 spin_unlock_irqrestore(&priv->lock, flags);
433
434 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
435 DMA_FROM_DEVICE);
436 length = status & BCOM_FEC_RX_BD_LEN_MASK;
437 skb_put(rskb, length - 4); /* length without CRC32 */
438 rskb->dev = dev;
439 rskb->protocol = eth_type_trans(rskb, dev);
440 netif_rx(rskb);
441
442 spin_lock_irqsave(&priv->lock, flags);
443 }
444
445 spin_unlock_irqrestore(&priv->lock, flags);
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 unsigned long flags;
457
458 ievent = in_be32(&fec->ievent);
459
460 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
461 if (!ievent)
462 return IRQ_NONE;
463
464 out_be32(&fec->ievent, ievent); /* clear pending events */
465
466 /* on fifo error, soft-reset fec */
467 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
468
469 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
470 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
471 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
472 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
473
474 spin_lock_irqsave(&priv->lock, flags);
475 mpc52xx_fec_reset(dev);
476 spin_unlock_irqrestore(&priv->lock, flags);
477
478 return IRQ_HANDLED;
479 }
480
481 if (ievent & ~FEC_IEVENT_TFINT)
482 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
483
484 return IRQ_HANDLED;
485 }
486
487 /*
488 * Get the current statistics.
489 * This may be called with the card open or closed.
490 */
491 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
492 {
493 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
494 struct net_device_stats *stats = &dev->stats;
495 struct mpc52xx_fec __iomem *fec = priv->fec;
496
497 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
498 stats->rx_packets = in_be32(&fec->rmon_r_packets);
499 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
500 in_be32(&fec->rmon_r_undersize) +
501 in_be32(&fec->rmon_r_oversize) +
502 in_be32(&fec->rmon_r_frag) +
503 in_be32(&fec->rmon_r_jab);
504
505 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
506 stats->tx_packets = in_be32(&fec->rmon_t_packets);
507 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
508 in_be32(&fec->rmon_t_undersize) +
509 in_be32(&fec->rmon_t_oversize) +
510 in_be32(&fec->rmon_t_frag) +
511 in_be32(&fec->rmon_t_jab);
512
513 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
514 stats->collisions = in_be32(&fec->rmon_t_col);
515
516 /* detailed rx_errors: */
517 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
518 + in_be32(&fec->rmon_r_oversize)
519 + in_be32(&fec->rmon_r_frag)
520 + in_be32(&fec->rmon_r_jab);
521 stats->rx_over_errors = in_be32(&fec->r_macerr);
522 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
523 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
524 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
525 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
526
527 /* detailed tx_errors: */
528 stats->tx_aborted_errors = 0;
529 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
530 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
531 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
532 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
533
534 return stats;
535 }
536
537 /*
538 * Read MIB counters in order to reset them,
539 * then zero all the stats fields in memory
540 */
541 static void mpc52xx_fec_reset_stats(struct net_device *dev)
542 {
543 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
544 struct mpc52xx_fec __iomem *fec = priv->fec;
545
546 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
547 memset_io(&fec->rmon_t_drop, 0,
548 offsetof(struct mpc52xx_fec, reserved10) -
549 offsetof(struct mpc52xx_fec, rmon_t_drop));
550 out_be32(&fec->mib_control, 0);
551
552 memset(&dev->stats, 0, sizeof(dev->stats));
553 }
554
555 /*
556 * Set or clear the multicast filter for this adaptor.
557 */
558 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
559 {
560 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
561 struct mpc52xx_fec __iomem *fec = priv->fec;
562 u32 rx_control;
563
564 rx_control = in_be32(&fec->r_cntrl);
565
566 if (dev->flags & IFF_PROMISC) {
567 rx_control |= FEC_RCNTRL_PROM;
568 out_be32(&fec->r_cntrl, rx_control);
569 } else {
570 rx_control &= ~FEC_RCNTRL_PROM;
571 out_be32(&fec->r_cntrl, rx_control);
572
573 if (dev->flags & IFF_ALLMULTI) {
574 out_be32(&fec->gaddr1, 0xffffffff);
575 out_be32(&fec->gaddr2, 0xffffffff);
576 } else {
577 u32 crc;
578 struct dev_mc_list *dmi;
579 u32 gaddr1 = 0x00000000;
580 u32 gaddr2 = 0x00000000;
581
582 netdev_for_each_mc_addr(dmi, dev) {
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 }
589 out_be32(&fec->gaddr1, gaddr1);
590 out_be32(&fec->gaddr2, gaddr2);
591 }
592 }
593 }
594
595 /**
596 * mpc52xx_fec_hw_init
597 * @dev: network device
598 *
599 * Setup various hardware setting, only needed once on start
600 */
601 static void mpc52xx_fec_hw_init(struct net_device *dev)
602 {
603 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
604 struct mpc52xx_fec __iomem *fec = priv->fec;
605 int i;
606
607 /* Whack a reset. We should wait for this. */
608 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
609 for (i = 0; i < FEC_RESET_DELAY; ++i) {
610 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
611 break;
612 udelay(1);
613 }
614 if (i == FEC_RESET_DELAY)
615 dev_err(&dev->dev, "FEC Reset timeout!\n");
616
617 /* set pause to 0x20 frames */
618 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
619
620 /* high service request will be deasserted when there's < 7 bytes in fifo
621 * low service request will be deasserted when there's < 4*7 bytes in fifo
622 */
623 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
624 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
625
626 /* alarm when <= x bytes in FIFO */
627 out_be32(&fec->rfifo_alarm, 0x0000030c);
628 out_be32(&fec->tfifo_alarm, 0x00000100);
629
630 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
631 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
632
633 /* enable crc generation */
634 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
635 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
636 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
637
638 /* set phy speed.
639 * this can't be done in phy driver, since it needs to be called
640 * before fec stuff (even on resume) */
641 out_be32(&fec->mii_speed, priv->mdio_speed);
642 }
643
644 /**
645 * mpc52xx_fec_start
646 * @dev: network device
647 *
648 * This function is called to start or restart the FEC during a link
649 * change. This happens on fifo errors or when switching between half
650 * and full duplex.
651 */
652 static void mpc52xx_fec_start(struct net_device *dev)
653 {
654 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
655 struct mpc52xx_fec __iomem *fec = priv->fec;
656 u32 rcntrl;
657 u32 tcntrl;
658 u32 tmp;
659
660 /* clear sticky error bits */
661 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
662 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
663 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
664
665 /* FIFOs will reset on mpc52xx_fec_enable */
666 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
667
668 /* Set station address. */
669 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
670
671 mpc52xx_fec_set_multicast_list(dev);
672
673 /* set max frame len, enable flow control, select mii mode */
674 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
675 rcntrl |= FEC_RCNTRL_FCE;
676
677 if (!priv->seven_wire_mode)
678 rcntrl |= FEC_RCNTRL_MII_MODE;
679
680 if (priv->duplex == DUPLEX_FULL)
681 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
682 else {
683 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
684 tcntrl = 0;
685 }
686 out_be32(&fec->r_cntrl, rcntrl);
687 out_be32(&fec->x_cntrl, tcntrl);
688
689 /* Clear any outstanding interrupt. */
690 out_be32(&fec->ievent, 0xffffffff);
691
692 /* Enable interrupts we wish to service. */
693 out_be32(&fec->imask, FEC_IMASK_ENABLE);
694
695 /* And last, enable the transmit and receive processing. */
696 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
697 out_be32(&fec->r_des_active, 0x01000000);
698 }
699
700 /**
701 * mpc52xx_fec_stop
702 * @dev: network device
703 *
704 * stop all activity on fec and empty dma buffers
705 */
706 static void mpc52xx_fec_stop(struct net_device *dev)
707 {
708 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
709 struct mpc52xx_fec __iomem *fec = priv->fec;
710 unsigned long timeout;
711
712 /* disable all interrupts */
713 out_be32(&fec->imask, 0);
714
715 /* Disable the rx task. */
716 bcom_disable(priv->rx_dmatsk);
717
718 /* Wait for tx queue to drain, but only if we're in process context */
719 if (!in_interrupt()) {
720 timeout = jiffies + msecs_to_jiffies(2000);
721 while (time_before(jiffies, timeout) &&
722 !bcom_queue_empty(priv->tx_dmatsk))
723 msleep(100);
724
725 if (time_after_eq(jiffies, timeout))
726 dev_err(&dev->dev, "queues didn't drain\n");
727 #if 1
728 if (time_after_eq(jiffies, timeout)) {
729 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
730 priv->tx_dmatsk->index,
731 priv->tx_dmatsk->outdex);
732 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
733 priv->rx_dmatsk->index,
734 priv->rx_dmatsk->outdex);
735 }
736 #endif
737 }
738
739 bcom_disable(priv->tx_dmatsk);
740
741 /* Stop FEC */
742 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
743 }
744
745 /* reset fec and bestcomm tasks */
746 static void mpc52xx_fec_reset(struct net_device *dev)
747 {
748 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
749 struct mpc52xx_fec __iomem *fec = priv->fec;
750
751 mpc52xx_fec_stop(dev);
752
753 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
754 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
755
756 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
757
758 mpc52xx_fec_hw_init(dev);
759
760 bcom_fec_rx_reset(priv->rx_dmatsk);
761 bcom_fec_tx_reset(priv->tx_dmatsk);
762
763 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
764
765 bcom_enable(priv->rx_dmatsk);
766 bcom_enable(priv->tx_dmatsk);
767
768 mpc52xx_fec_start(dev);
769
770 netif_wake_queue(dev);
771 }
772
773
774 /* ethtool interface */
775 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
776 struct ethtool_drvinfo *info)
777 {
778 strcpy(info->driver, DRIVER_NAME);
779 }
780
781 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
782 {
783 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
784
785 if (!priv->phydev)
786 return -ENODEV;
787
788 return phy_ethtool_gset(priv->phydev, cmd);
789 }
790
791 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
792 {
793 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
794
795 if (!priv->phydev)
796 return -ENODEV;
797
798 return phy_ethtool_sset(priv->phydev, cmd);
799 }
800
801 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
802 {
803 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
804 return priv->msg_enable;
805 }
806
807 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
808 {
809 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
810 priv->msg_enable = level;
811 }
812
813 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
814 .get_drvinfo = mpc52xx_fec_get_drvinfo,
815 .get_settings = mpc52xx_fec_get_settings,
816 .set_settings = mpc52xx_fec_set_settings,
817 .get_link = ethtool_op_get_link,
818 .get_msglevel = mpc52xx_fec_get_msglevel,
819 .set_msglevel = mpc52xx_fec_set_msglevel,
820 };
821
822
823 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
824 {
825 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
826
827 if (!priv->phydev)
828 return -ENOTSUPP;
829
830 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
831 }
832
833 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
834 .ndo_open = mpc52xx_fec_open,
835 .ndo_stop = mpc52xx_fec_close,
836 .ndo_start_xmit = mpc52xx_fec_start_xmit,
837 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
838 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
839 .ndo_validate_addr = eth_validate_addr,
840 .ndo_do_ioctl = mpc52xx_fec_ioctl,
841 .ndo_change_mtu = eth_change_mtu,
842 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
843 .ndo_get_stats = mpc52xx_fec_get_stats,
844 #ifdef CONFIG_NET_POLL_CONTROLLER
845 .ndo_poll_controller = mpc52xx_fec_poll_controller,
846 #endif
847 };
848
849 /* ======================================================================== */
850 /* OF Driver */
851 /* ======================================================================== */
852
853 static int __devinit
854 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
855 {
856 int rv;
857 struct net_device *ndev;
858 struct mpc52xx_fec_priv *priv = NULL;
859 struct resource mem;
860 const u32 *prop;
861 int prop_size;
862
863 phys_addr_t rx_fifo;
864 phys_addr_t tx_fifo;
865
866 /* Get the ether ndev & it's private zone */
867 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
868 if (!ndev)
869 return -ENOMEM;
870
871 priv = netdev_priv(ndev);
872 priv->ndev = ndev;
873
874 /* Reserve FEC control zone */
875 rv = of_address_to_resource(op->node, 0, &mem);
876 if (rv) {
877 printk(KERN_ERR DRIVER_NAME ": "
878 "Error while parsing device node resource\n" );
879 return rv;
880 }
881 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
882 printk(KERN_ERR DRIVER_NAME
883 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
884 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
885 return -EINVAL;
886 }
887
888 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
889 return -EBUSY;
890
891 /* Init ether ndev with what we have */
892 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
893 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
894 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
895 ndev->base_addr = mem.start;
896 SET_NETDEV_DEV(ndev, &op->dev);
897
898 spin_lock_init(&priv->lock);
899
900 /* ioremap the zones */
901 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
902
903 if (!priv->fec) {
904 rv = -ENOMEM;
905 goto probe_error;
906 }
907
908 /* Bestcomm init */
909 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
910 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
911
912 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
913 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
914
915 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
916 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
917 rv = -ENOMEM;
918 goto probe_error;
919 }
920
921 /* Get the IRQ we need one by one */
922 /* Control */
923 ndev->irq = irq_of_parse_and_map(op->node, 0);
924
925 /* RX */
926 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
927
928 /* TX */
929 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
930
931 /* MAC address init */
932 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
933 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
934 else
935 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
936
937 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
938
939 /*
940 * Link mode configuration
941 */
942
943 /* Start with safe defaults for link connection */
944 priv->speed = 100;
945 priv->duplex = DUPLEX_HALF;
946 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
947
948 /* The current speed preconfigures the speed of the MII link */
949 prop = of_get_property(op->node, "current-speed", &prop_size);
950 if (prop && (prop_size >= sizeof(u32) * 2)) {
951 priv->speed = prop[0];
952 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
953 }
954
955 /* If there is a phy handle, then get the PHY node */
956 priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
957
958 /* the 7-wire property means don't use MII mode */
959 if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) {
960 priv->seven_wire_mode = 1;
961 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
962 }
963
964 /* Hardware init */
965 mpc52xx_fec_hw_init(ndev);
966 mpc52xx_fec_reset_stats(ndev);
967
968 rv = register_netdev(ndev);
969 if (rv < 0)
970 goto probe_error;
971
972 /* We're done ! */
973 dev_set_drvdata(&op->dev, ndev);
974
975 return 0;
976
977
978 /* Error handling - free everything that might be allocated */
979 probe_error:
980
981 if (priv->phy_node)
982 of_node_put(priv->phy_node);
983 priv->phy_node = NULL;
984
985 irq_dispose_mapping(ndev->irq);
986
987 if (priv->rx_dmatsk)
988 bcom_fec_rx_release(priv->rx_dmatsk);
989 if (priv->tx_dmatsk)
990 bcom_fec_tx_release(priv->tx_dmatsk);
991
992 if (priv->fec)
993 iounmap(priv->fec);
994
995 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
996
997 free_netdev(ndev);
998
999 return rv;
1000 }
1001
1002 static int
1003 mpc52xx_fec_remove(struct of_device *op)
1004 {
1005 struct net_device *ndev;
1006 struct mpc52xx_fec_priv *priv;
1007
1008 ndev = dev_get_drvdata(&op->dev);
1009 priv = netdev_priv(ndev);
1010
1011 unregister_netdev(ndev);
1012
1013 if (priv->phy_node)
1014 of_node_put(priv->phy_node);
1015 priv->phy_node = NULL;
1016
1017 irq_dispose_mapping(ndev->irq);
1018
1019 bcom_fec_rx_release(priv->rx_dmatsk);
1020 bcom_fec_tx_release(priv->tx_dmatsk);
1021
1022 iounmap(priv->fec);
1023
1024 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1025
1026 free_netdev(ndev);
1027
1028 dev_set_drvdata(&op->dev, NULL);
1029 return 0;
1030 }
1031
1032 #ifdef CONFIG_PM
1033 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1034 {
1035 struct net_device *dev = dev_get_drvdata(&op->dev);
1036
1037 if (netif_running(dev))
1038 mpc52xx_fec_close(dev);
1039
1040 return 0;
1041 }
1042
1043 static int mpc52xx_fec_of_resume(struct of_device *op)
1044 {
1045 struct net_device *dev = dev_get_drvdata(&op->dev);
1046
1047 mpc52xx_fec_hw_init(dev);
1048 mpc52xx_fec_reset_stats(dev);
1049
1050 if (netif_running(dev))
1051 mpc52xx_fec_open(dev);
1052
1053 return 0;
1054 }
1055 #endif
1056
1057 static struct of_device_id mpc52xx_fec_match[] = {
1058 { .compatible = "fsl,mpc5200b-fec", },
1059 { .compatible = "fsl,mpc5200-fec", },
1060 { .compatible = "mpc5200-fec", },
1061 { }
1062 };
1063
1064 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1065
1066 static struct of_platform_driver mpc52xx_fec_driver = {
1067 .owner = THIS_MODULE,
1068 .name = DRIVER_NAME,
1069 .match_table = mpc52xx_fec_match,
1070 .probe = mpc52xx_fec_probe,
1071 .remove = mpc52xx_fec_remove,
1072 #ifdef CONFIG_PM
1073 .suspend = mpc52xx_fec_of_suspend,
1074 .resume = mpc52xx_fec_of_resume,
1075 #endif
1076 };
1077
1078
1079 /* ======================================================================== */
1080 /* Module */
1081 /* ======================================================================== */
1082
1083 static int __init
1084 mpc52xx_fec_init(void)
1085 {
1086 #ifdef CONFIG_FEC_MPC52xx_MDIO
1087 int ret;
1088 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1089 if (ret) {
1090 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1091 return ret;
1092 }
1093 #endif
1094 return of_register_platform_driver(&mpc52xx_fec_driver);
1095 }
1096
1097 static void __exit
1098 mpc52xx_fec_exit(void)
1099 {
1100 of_unregister_platform_driver(&mpc52xx_fec_driver);
1101 #ifdef CONFIG_FEC_MPC52xx_MDIO
1102 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1103 #endif
1104 }
1105
1106
1107 module_init(mpc52xx_fec_init);
1108 module_exit(mpc52xx_fec_exit);
1109
1110 MODULE_LICENSE("GPL");
1111 MODULE_AUTHOR("Dale Farnsworth");
1112 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree