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ipg: fix receivemode IPG_RM_RECEIVEMULTICAST{,HASH} in ipg_nic_set_multicast_list()
[deliverable/linux.git] / drivers / net / fec_mpc52xx.c
CommitLineData
5d031e9e
DP		 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
80791be1
GL		 46#define FEC5200_PHYADDR_NONE (-1)
47#define FEC5200_PHYADDR_7WIRE (-2)
48
49/* Private driver data structure */
50struct 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
5d031e9e
DP		 69static irqreturn_t mpc52xx_fec_interrupt(int, void *);
70static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
71static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
72static void mpc52xx_fec_stop(struct net_device *dev);
73static void mpc52xx_fec_start(struct net_device *dev);
74static void mpc52xx_fec_reset(struct net_device *dev);
75
76static u8 mpc52xx_fec_mac_addr[6];
77module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
78MODULE_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_IFDOWN )
82static int debug = -1; /* the above default */
83module_param(debug, int, 0);
84MODULE_PARM_DESC(debug, "debugging messages level");
85
86static 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
97static 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
106static 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
115static 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
125static 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
137static 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 */
163static 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 netif_schedule(dev);
201 netif_carrier_on(dev);
202 netif_start_queue(dev);
203 }
204
205 } else if (priv->link) {
206 new_state = 1;
207 priv->link = PHY_DOWN;
208 priv->speed = 0;
209 priv->duplex = -1;
210 netif_stop_queue(dev);
211 netif_carrier_off(dev);
212 }
213
214 if (new_state && netif_msg_link(priv))
215 phy_print_status(phydev);
216}
217
218static int mpc52xx_fec_init_phy(struct net_device *dev)
219{
220 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
221 struct phy_device *phydev;
222 char phy_id[BUS_ID_SIZE];
223
9d9326d3 224 snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
5d031e9e
DP		 225 (unsigned int)dev->base_addr, priv->phy_addr);
226
227 priv->link = PHY_DOWN;
228 priv->speed = 0;
229 priv->duplex = -1;
230
231 phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
232 if (IS_ERR(phydev)) {
233 dev_err(&dev->dev, "phy_connect failed\n");
234 return PTR_ERR(phydev);
235 }
236 dev_info(&dev->dev, "attached phy %i to driver %s\n",
237 phydev->addr, phydev->drv->name);
238
239 priv->phydev = phydev;
240
241 return 0;
242}
243
244static int mpc52xx_fec_phy_start(struct net_device *dev)
245{
246 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
247 int err;
248
80791be1 249 if (priv->phy_addr < 0)
5d031e9e
DP		 250 return 0;
251
252 err = mpc52xx_fec_init_phy(dev);
253 if (err) {
254 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
255 return err;
256 }
257
258 /* reset phy - this also wakes it from PDOWN */
259 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
260 phy_start(priv->phydev);
261
262 return 0;
263}
264
265static void mpc52xx_fec_phy_stop(struct net_device *dev)
266{
267 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
268
80791be1 269 if (!priv->phydev)
5d031e9e
DP		 270 return;
271
272 phy_disconnect(priv->phydev);
273 /* power down phy */
274 phy_stop(priv->phydev);
275 phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
276}
277
278static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
279 struct mii_ioctl_data *mii_data, int cmd)
280{
80791be1 281 if (!priv->phydev)
5d031e9e
DP		 282 return -ENOTSUPP;
283
284 return phy_mii_ioctl(priv->phydev, mii_data, cmd);
285}
286
287static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
288{
289 struct mpc52xx_fec __iomem *fec = priv->fec;
290
80791be1 291 if (priv->phydev)
5d031e9e
DP		 292 return;
293
294 out_be32(&fec->mii_speed, priv->phy_speed);
295}
296
297static int mpc52xx_fec_open(struct net_device *dev)
298{
299 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
300 int err = -EBUSY;
301
302 if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
303 DRIVER_NAME "_ctrl", dev)) {
304 dev_err(&dev->dev, "ctrl interrupt request failed\n");
305 goto out;
306 }
307 if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
308 DRIVER_NAME "_rx", dev)) {
309 dev_err(&dev->dev, "rx interrupt request failed\n");
310 goto free_ctrl_irq;
311 }
312 if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
313 DRIVER_NAME "_tx", dev)) {
314 dev_err(&dev->dev, "tx interrupt request failed\n");
315 goto free_2irqs;
316 }
317
318 bcom_fec_rx_reset(priv->rx_dmatsk);
319 bcom_fec_tx_reset(priv->tx_dmatsk);
320
321 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
322 if (err) {
323 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
324 goto free_irqs;
325 }
326
327 err = mpc52xx_fec_phy_start(dev);
328 if (err)
329 goto free_skbs;
330
331 bcom_enable(priv->rx_dmatsk);
332 bcom_enable(priv->tx_dmatsk);
333
334 mpc52xx_fec_start(dev);
335
336 netif_start_queue(dev);
337
338 return 0;
339
340 free_skbs:
341 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
342
343 free_irqs:
344 free_irq(priv->t_irq, dev);
345 free_2irqs:
346 free_irq(priv->r_irq, dev);
347 free_ctrl_irq:
348 free_irq(dev->irq, dev);
349 out:
350
351 return err;
352}
353
354static int mpc52xx_fec_close(struct net_device *dev)
355{
356 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
357
358 netif_stop_queue(dev);
359
360 mpc52xx_fec_stop(dev);
361
362 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
363
364 free_irq(dev->irq, dev);
365 free_irq(priv->r_irq, dev);
366 free_irq(priv->t_irq, dev);
367
368 mpc52xx_fec_phy_stop(dev);
369
370 return 0;
371}
372
373/* This will only be invoked if your driver is _not_ in XOFF state.
374 * What this means is that you need not check it, and that this
375 * invariant will hold if you make sure that the netif_*_queue()
376 * calls are done at the proper times.
377 */
378static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
379{
380 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
381 struct bcom_fec_bd *bd;
382
383 if (bcom_queue_full(priv->tx_dmatsk)) {
384 if (net_ratelimit())
385 dev_err(&dev->dev, "transmit queue overrun\n");
386 return 1;
387 }
388
389 spin_lock_irq(&priv->lock);
390 dev->trans_start = jiffies;
391
392 bd = (struct bcom_fec_bd *)
393 bcom_prepare_next_buffer(priv->tx_dmatsk);
394
395 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
396 bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
397
398 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
399
400 if (bcom_queue_full(priv->tx_dmatsk)) {
401 netif_stop_queue(dev);
402 }
403
404 spin_unlock_irq(&priv->lock);
405
406 return 0;
407}
408
409/* This handles BestComm transmit task interrupts
410 */
411static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
412{
413 struct net_device *dev = dev_id;
414 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
415
416 spin_lock(&priv->lock);
417
418 while (bcom_buffer_done(priv->tx_dmatsk)) {
419 struct sk_buff *skb;
420 struct bcom_fec_bd *bd;
421 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
422 (struct bcom_bd **)&bd);
423 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
424
425 dev_kfree_skb_irq(skb);
426 }
427
428 netif_wake_queue(dev);
429
430 spin_unlock(&priv->lock);
431
432 return IRQ_HANDLED;
433}
434
435static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
436{
437 struct net_device *dev = dev_id;
438 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
439
440 while (bcom_buffer_done(priv->rx_dmatsk)) {
441 struct sk_buff *skb;
442 struct sk_buff *rskb;
443 struct bcom_fec_bd *bd;
444 u32 status;
445
446 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
447 (struct bcom_bd **)&bd);
4c537e63 448 dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
5d031e9e
DP		 449
450 /* Test for errors in received frame */
451 if (status & BCOM_FEC_RX_BD_ERRORS) {
452 /* Drop packet and reuse the buffer */
453 bd = (struct bcom_fec_bd *)
454 bcom_prepare_next_buffer(priv->rx_dmatsk);
455
456 bd->status = FEC_RX_BUFFER_SIZE;
457 bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
458 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
459
460 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
461
462 dev->stats.rx_dropped++;
463
464 continue;
465 }
466
467 /* skbs are allocated on open, so now we allocate a new one,
468 * and remove the old (with the packet) */
469 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
470 if (skb) {
471 /* Process the received skb */
472 int length = status & BCOM_FEC_RX_BD_LEN_MASK;
473
474 skb_put(rskb, length - 4); /* length without CRC32 */
475
476 rskb->dev = dev;
477 rskb->protocol = eth_type_trans(rskb, dev);
478
479 netif_rx(rskb);
480 dev->last_rx = jiffies;
481 } else {
482 /* Can't get a new one : reuse the same & drop pkt */
483 dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
484 dev->stats.rx_dropped++;
485
486 skb = rskb;
487 }
488
489 bd = (struct bcom_fec_bd *)
490 bcom_prepare_next_buffer(priv->rx_dmatsk);
491
492 bd->status = FEC_RX_BUFFER_SIZE;
4c537e63 493 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
5d031e9e
DP		 494 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
495
496 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
497 }
498
499 return IRQ_HANDLED;
500}
501
502static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
503{
504 struct net_device *dev = dev_id;
505 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
506 struct mpc52xx_fec __iomem *fec = priv->fec;
507 u32 ievent;
508
509 ievent = in_be32(&fec->ievent);
510
511 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
512 if (!ievent)
513 return IRQ_NONE;
514
515 out_be32(&fec->ievent, ievent); /* clear pending events */
516
8f3ba2dc
SH		 517 /* on fifo error, soft-reset fec */
518 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
519
520 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
521 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
522 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
523 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
524
525 mpc52xx_fec_reset(dev);
526
527 netif_wake_queue(dev);
5d031e9e
DP		 528 return IRQ_HANDLED;
529 }
530
8f3ba2dc
SH		 531 if (ievent & ~FEC_IEVENT_TFINT)
532 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
5d031e9e 533
5d031e9e
DP		 534 return IRQ_HANDLED;
535}
536
537/*
538 * Get the current statistics.
539 * This may be called with the card open or closed.
540 */
541static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
542{
543 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
544 struct net_device_stats *stats = &dev->stats;
545 struct mpc52xx_fec __iomem *fec = priv->fec;
546
547 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
548 stats->rx_packets = in_be32(&fec->rmon_r_packets);
549 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
550 in_be32(&fec->rmon_r_undersize) +
551 in_be32(&fec->rmon_r_oversize) +
552 in_be32(&fec->rmon_r_frag) +
553 in_be32(&fec->rmon_r_jab);
554
555 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
556 stats->tx_packets = in_be32(&fec->rmon_t_packets);
557 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
558 in_be32(&fec->rmon_t_undersize) +
559 in_be32(&fec->rmon_t_oversize) +
560 in_be32(&fec->rmon_t_frag) +
561 in_be32(&fec->rmon_t_jab);
562
563 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
564 stats->collisions = in_be32(&fec->rmon_t_col);
565
566 /* detailed rx_errors: */
567 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
568 + in_be32(&fec->rmon_r_oversize)
569 + in_be32(&fec->rmon_r_frag)
570 + in_be32(&fec->rmon_r_jab);
571 stats->rx_over_errors = in_be32(&fec->r_macerr);
572 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
573 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
574 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
575 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
576
577 /* detailed tx_errors: */
578 stats->tx_aborted_errors = 0;
579 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
580 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
581 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
582 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
583
584 return stats;
585}
586
587/*
588 * Read MIB counters in order to reset them,
589 * then zero all the stats fields in memory
590 */
591static void mpc52xx_fec_reset_stats(struct net_device *dev)
592{
593 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
594 struct mpc52xx_fec __iomem *fec = priv->fec;
595
596 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
cc154ac6
AV		 597 memset_io(&fec->rmon_t_drop, 0,
598 offsetof(struct mpc52xx_fec, reserved10) -
599 offsetof(struct mpc52xx_fec, rmon_t_drop));
5d031e9e
DP		 600 out_be32(&fec->mib_control, 0);
601
602 memset(&dev->stats, 0, sizeof(dev->stats));
603}
604
605/*
606 * Set or clear the multicast filter for this adaptor.
607 */
608static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
609{
610 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
611 struct mpc52xx_fec __iomem *fec = priv->fec;
612 u32 rx_control;
613
614 rx_control = in_be32(&fec->r_cntrl);
615
616 if (dev->flags & IFF_PROMISC) {
617 rx_control |= FEC_RCNTRL_PROM;
618 out_be32(&fec->r_cntrl, rx_control);
619 } else {
620 rx_control &= ~FEC_RCNTRL_PROM;
621 out_be32(&fec->r_cntrl, rx_control);
622
623 if (dev->flags & IFF_ALLMULTI) {
624 out_be32(&fec->gaddr1, 0xffffffff);
625 out_be32(&fec->gaddr2, 0xffffffff);
626 } else {
627 u32 crc;
628 int i;
629 struct dev_mc_list *dmi;
630 u32 gaddr1 = 0x00000000;
631 u32 gaddr2 = 0x00000000;
632
633 dmi = dev->mc_list;
634 for (i=0; i<dev->mc_count; i++) {
635 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
636 if (crc >= 32)
637 gaddr1 |= 1 << (crc-32);
638 else
639 gaddr2 |= 1 << crc;
640 dmi = dmi->next;
641 }
642 out_be32(&fec->gaddr1, gaddr1);
643 out_be32(&fec->gaddr2, gaddr2);
644 }
645 }
646}
647
648/**
649 * mpc52xx_fec_hw_init
650 * @dev: network device
651 *
652 * Setup various hardware setting, only needed once on start
653 */
654static void mpc52xx_fec_hw_init(struct net_device *dev)
655{
656 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
657 struct mpc52xx_fec __iomem *fec = priv->fec;
658 int i;
659
660 /* Whack a reset. We should wait for this. */
661 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
662 for (i = 0; i < FEC_RESET_DELAY; ++i) {
663 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
664 break;
665 udelay(1);
666 }
667 if (i == FEC_RESET_DELAY)
668 dev_err(&dev->dev, "FEC Reset timeout!\n");
669
670 /* set pause to 0x20 frames */
671 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
672
673 /* high service request will be deasserted when there's < 7 bytes in fifo
674 * low service request will be deasserted when there's < 4*7 bytes in fifo
675 */
676 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
677 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
678
679 /* alarm when <= x bytes in FIFO */
680 out_be32(&fec->rfifo_alarm, 0x0000030c);
681 out_be32(&fec->tfifo_alarm, 0x00000100);
682
683 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
684 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
685
686 /* enable crc generation */
687 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
688 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
689 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
690
691 /* set phy speed.
692 * this can't be done in phy driver, since it needs to be called
693 * before fec stuff (even on resume) */
694 mpc52xx_fec_phy_hw_init(priv);
695}
696
697/**
698 * mpc52xx_fec_start
699 * @dev: network device
700 *
701 * This function is called to start or restart the FEC during a link
702 * change. This happens on fifo errors or when switching between half
703 * and full duplex.
704 */
705static void mpc52xx_fec_start(struct net_device *dev)
706{
707 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
708 struct mpc52xx_fec __iomem *fec = priv->fec;
709 u32 rcntrl;
710 u32 tcntrl;
711 u32 tmp;
712
713 /* clear sticky error bits */
714 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
715 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
716 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
717
718 /* FIFOs will reset on mpc52xx_fec_enable */
719 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
720
721 /* Set station address. */
722 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
723
724 mpc52xx_fec_set_multicast_list(dev);
725
726 /* set max frame len, enable flow control, select mii mode */
727 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
728 rcntrl |= FEC_RCNTRL_FCE;
729
80791be1 730 if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
5d031e9e
DP		 731 rcntrl |= FEC_RCNTRL_MII_MODE;
732
733 if (priv->duplex == DUPLEX_FULL)
734 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
735 else {
736 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
737 tcntrl = 0;
738 }
739 out_be32(&fec->r_cntrl, rcntrl);
740 out_be32(&fec->x_cntrl, tcntrl);
741
742 /* Clear any outstanding interrupt. */
743 out_be32(&fec->ievent, 0xffffffff);
744
745 /* Enable interrupts we wish to service. */
746 out_be32(&fec->imask, FEC_IMASK_ENABLE);
747
748 /* And last, enable the transmit and receive processing. */
749 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
750 out_be32(&fec->r_des_active, 0x01000000);
751}
752
753/**
754 * mpc52xx_fec_stop
755 * @dev: network device
756 *
757 * stop all activity on fec and empty dma buffers
758 */
759static void mpc52xx_fec_stop(struct net_device *dev)
760{
761 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
762 struct mpc52xx_fec __iomem *fec = priv->fec;
763 unsigned long timeout;
764
765 /* disable all interrupts */
766 out_be32(&fec->imask, 0);
767
768 /* Disable the rx task. */
769 bcom_disable(priv->rx_dmatsk);
770
771 /* Wait for tx queue to drain, but only if we're in process context */
772 if (!in_interrupt()) {
773 timeout = jiffies + msecs_to_jiffies(2000);
774 while (time_before(jiffies, timeout) &&
775 !bcom_queue_empty(priv->tx_dmatsk))
776 msleep(100);
777
778 if (time_after_eq(jiffies, timeout))
779 dev_err(&dev->dev, "queues didn't drain\n");
780#if 1
781 if (time_after_eq(jiffies, timeout)) {
782 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
783 priv->tx_dmatsk->index,
784 priv->tx_dmatsk->outdex);
785 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
786 priv->rx_dmatsk->index,
787 priv->rx_dmatsk->outdex);
788 }
789#endif
790 }
791
792 bcom_disable(priv->tx_dmatsk);
793
794 /* Stop FEC */
795 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
796
797 return;
798}
799
800/* reset fec and bestcomm tasks */
801static void mpc52xx_fec_reset(struct net_device *dev)
802{
803 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
804 struct mpc52xx_fec __iomem *fec = priv->fec;
805
806 mpc52xx_fec_stop(dev);
807
808 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
809 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
810
811 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
812
813 mpc52xx_fec_hw_init(dev);
814
815 phy_stop(priv->phydev);
816 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
817 phy_start(priv->phydev);
818
819 bcom_fec_rx_reset(priv->rx_dmatsk);
820 bcom_fec_tx_reset(priv->tx_dmatsk);
821
822 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
823
824 bcom_enable(priv->rx_dmatsk);
825 bcom_enable(priv->tx_dmatsk);
826
827 mpc52xx_fec_start(dev);
828}
829
830
831/* ethtool interface */
832static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
833 struct ethtool_drvinfo *info)
834{
835 strcpy(info->driver, DRIVER_NAME);
836}
837
838static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
839{
840 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
841 return phy_ethtool_gset(priv->phydev, cmd);
842}
843
844static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
845{
846 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
847 return phy_ethtool_sset(priv->phydev, cmd);
848}
849
850static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
851{
852 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
853 return priv->msg_enable;
854}
855
856static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
857{
858 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
859 priv->msg_enable = level;
860}
861
862static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
863 .get_drvinfo = mpc52xx_fec_get_drvinfo,
864 .get_settings = mpc52xx_fec_get_settings,
865 .set_settings = mpc52xx_fec_set_settings,
866 .get_link = ethtool_op_get_link,
867 .get_msglevel = mpc52xx_fec_get_msglevel,
868 .set_msglevel = mpc52xx_fec_set_msglevel,
869};
870
871
872static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
873{
874 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
875
876 return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
877}
878
879/* ======================================================================== */
880/* OF Driver */
881/* ======================================================================== */
882
883static int __devinit
884mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
885{
886 int rv;
887 struct net_device *ndev;
888 struct mpc52xx_fec_priv *priv = NULL;
889 struct resource mem;
80791be1
GL		 890 struct device_node *phy_node;
891 const phandle *phy_handle;
892 const u32 *prop;
893 int prop_size;
5d031e9e
DP		 894
895 phys_addr_t rx_fifo;
896 phys_addr_t tx_fifo;
897
898 /* Get the ether ndev & it's private zone */
899 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
900 if (!ndev)
901 return -ENOMEM;
902
903 priv = netdev_priv(ndev);
904
905 /* Reserve FEC control zone */
906 rv = of_address_to_resource(op->node, 0, &mem);
907 if (rv) {
908 printk(KERN_ERR DRIVER_NAME ": "
909 "Error while parsing device node resource\n" );
910 return rv;
911 }
48d58459 912 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
5d031e9e 913 printk(KERN_ERR DRIVER_NAME
48d58459 914 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
5d031e9e
DP		 915 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
916 return -EINVAL;
917 }
918
919 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
920 return -EBUSY;
921
922 /* Init ether ndev with what we have */
923 ndev->open = mpc52xx_fec_open;
924 ndev->stop = mpc52xx_fec_close;
925 ndev->hard_start_xmit = mpc52xx_fec_hard_start_xmit;
926 ndev->do_ioctl = mpc52xx_fec_ioctl;
927 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
928 ndev->get_stats = mpc52xx_fec_get_stats;
929 ndev->set_mac_address = mpc52xx_fec_set_mac_address;
930 ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
931 ndev->tx_timeout = mpc52xx_fec_tx_timeout;
932 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
933 ndev->base_addr = mem.start;
934
935 priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
936
937 spin_lock_init(&priv->lock);
938
939 /* ioremap the zones */
940 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
941
942 if (!priv->fec) {
943 rv = -ENOMEM;
944 goto probe_error;
945 }
946
947 /* Bestcomm init */
948 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
949 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
950
951 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
952 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
953
954 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
955 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
956 rv = -ENOMEM;
957 goto probe_error;
958 }
959
960 /* Get the IRQ we need one by one */
961 /* Control */
962 ndev->irq = irq_of_parse_and_map(op->node, 0);
963
964 /* RX */
965 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
966
967 /* TX */
968 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
969
970 /* MAC address init */
971 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
972 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
973 else
974 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
975
976 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
5d031e9e 977
80791be1
GL		 978 /*
979 * Link mode configuration
980 */
5d031e9e 981
80791be1
GL		 982 /* Start with safe defaults for link connection */
983 priv->phy_addr = FEC5200_PHYADDR_NONE;
984 priv->speed = 100;
985 priv->duplex = DUPLEX_HALF;
986 priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
987
988 /* the 7-wire property means don't use MII mode */
989 if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
990 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
991
992 /* The current speed preconfigures the speed of the MII link */
993 prop = of_get_property(op->node, "current-speed", &prop_size);
994 if (prop && (prop_size >= sizeof(u32) * 2)) {
995 priv->speed = prop[0];
996 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
997 }
5d031e9e 998
80791be1
GL		 999 /* If there is a phy handle, setup link to that phy */
1000 phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
1001 if (phy_handle && (prop_size >= sizeof(phandle))) {
1002 phy_node = of_find_node_by_phandle(*phy_handle);
1003 prop = of_get_property(phy_node, "reg", &prop_size);
1004 if (prop && (prop_size >= sizeof(u32)))
1005 if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1006 priv->phy_addr = *prop;
1007 of_node_put(phy_node);
5d031e9e
DP		 1008 }
1009
1010 /* Hardware init */
1011 mpc52xx_fec_hw_init(ndev);
1012
1013 mpc52xx_fec_reset_stats(ndev);
1014
3d26e695
DW		 1015 SET_NETDEV_DEV(ndev, &op->dev);
1016
5d031e9e
DP		 1017 /* Register the new network device */
1018 rv = register_netdev(ndev);
1019 if (rv < 0)
1020 goto probe_error;
1021
80791be1
GL		 1022 /* Now report the link setup */
1023 switch (priv->phy_addr) {
1024 case FEC5200_PHYADDR_NONE:
1025 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1026 priv->speed, priv->duplex ? 'F' : 'H');
1027 break;
1028 case FEC5200_PHYADDR_7WIRE:
1029 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1030 break;
1031 default:
1032 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1033 priv->phy_addr);
1034 }
1035
5d031e9e
DP		 1036 /* We're done ! */
1037 dev_set_drvdata(&op->dev, ndev);
1038
1039 return 0;
1040
1041
1042 /* Error handling - free everything that might be allocated */
1043probe_error:
1044
1045 irq_dispose_mapping(ndev->irq);
1046
1047 if (priv->rx_dmatsk)
1048 bcom_fec_rx_release(priv->rx_dmatsk);
1049 if (priv->tx_dmatsk)
1050 bcom_fec_tx_release(priv->tx_dmatsk);
1051
1052 if (priv->fec)
1053 iounmap(priv->fec);
1054
1055 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1056
1057 free_netdev(ndev);
1058
1059 return rv;
1060}
1061
1062static int
1063mpc52xx_fec_remove(struct of_device *op)
1064{
1065 struct net_device *ndev;
1066 struct mpc52xx_fec_priv *priv;
1067
1068 ndev = dev_get_drvdata(&op->dev);
1069 priv = netdev_priv(ndev);
1070
1071 unregister_netdev(ndev);
1072
1073 irq_dispose_mapping(ndev->irq);
1074
1075 bcom_fec_rx_release(priv->rx_dmatsk);
1076 bcom_fec_tx_release(priv->tx_dmatsk);
1077
1078 iounmap(priv->fec);
1079
1080 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1081
1082 free_netdev(ndev);
1083
1084 dev_set_drvdata(&op->dev, NULL);
1085 return 0;
1086}
1087
1088#ifdef CONFIG_PM
1089static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1090{
1091 struct net_device *dev = dev_get_drvdata(&op->dev);
1092
1093 if (netif_running(dev))
1094 mpc52xx_fec_close(dev);
1095
1096 return 0;
1097}
1098
1099static int mpc52xx_fec_of_resume(struct of_device *op)
1100{
1101 struct net_device *dev = dev_get_drvdata(&op->dev);
1102
1103 mpc52xx_fec_hw_init(dev);
1104 mpc52xx_fec_reset_stats(dev);
1105
1106 if (netif_running(dev))
1107 mpc52xx_fec_open(dev);
1108
1109 return 0;
1110}
1111#endif
1112
1113static struct of_device_id mpc52xx_fec_match[] = {
8d813941 1114 { .type = "network", .compatible = "fsl,mpc5200b-fec", },
66ffbe49
GL		 1115 { .type = "network", .compatible = "fsl,mpc5200-fec", },
1116 { .type = "network", .compatible = "mpc5200-fec", },
5d031e9e
DP		 1117 { }
1118};
1119
1120MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1121
1122static struct of_platform_driver mpc52xx_fec_driver = {
1123 .owner = THIS_MODULE,
1124 .name = DRIVER_NAME,
1125 .match_table = mpc52xx_fec_match,
1126 .probe = mpc52xx_fec_probe,
1127 .remove = mpc52xx_fec_remove,
1128#ifdef CONFIG_PM
1129 .suspend = mpc52xx_fec_of_suspend,
1130 .resume = mpc52xx_fec_of_resume,
1131#endif
1132};
1133
1134
1135/* ======================================================================== */
1136/* Module */
1137/* ======================================================================== */
1138
1139static int __init
1140mpc52xx_fec_init(void)
1141{
1142#ifdef CONFIG_FEC_MPC52xx_MDIO
1143 int ret;
1144 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1145 if (ret) {
1146 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1147 return ret;
1148 }
1149#endif
1150 return of_register_platform_driver(&mpc52xx_fec_driver);
1151}
1152
1153static void __exit
1154mpc52xx_fec_exit(void)
1155{
1156 of_unregister_platform_driver(&mpc52xx_fec_driver);
1157#ifdef CONFIG_FEC_MPC52xx_MDIO
1158 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1159#endif
1160}
1161
1162
1163module_init(mpc52xx_fec_init);
1164module_exit(mpc52xx_fec_exit);
1165
1166MODULE_LICENSE("GPL");
1167MODULE_AUTHOR("Dale Farnsworth");
1168MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
Linux kernel - Deliverables
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