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net/fec_mpc52xx: Migrate to net_device_ops.
[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 | \
8b983510 81 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
5d031e9e
DP		 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);
461cadbc
GL		 132 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
133 DMA_FROM_DEVICE);
5d031e9e
DP		 134 kfree_skb(skb);
135 }
136}
137
138static 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;
461cadbc 154 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
5d031e9e
DP		 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 */
164static 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;
5d031e9e
DP		 201 }
202
203 } else if (priv->link) {
204 new_state = 1;
205 priv->link = PHY_DOWN;
206 priv->speed = 0;
207 priv->duplex = -1;
5d031e9e
DP		 208 }
209
210 if (new_state && netif_msg_link(priv))
211 phy_print_status(phydev);
212}
213
214static int mpc52xx_fec_init_phy(struct net_device *dev)
215{
216 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
217 struct phy_device *phydev;
218 char phy_id[BUS_ID_SIZE];
219
fb28ad35 220 snprintf(phy_id, sizeof(phy_id), "%x:%02x",
5d031e9e
DP		 221 (unsigned int)dev->base_addr, priv->phy_addr);
222
223 priv->link = PHY_DOWN;
224 priv->speed = 0;
225 priv->duplex = -1;
226
227 phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
228 if (IS_ERR(phydev)) {
229 dev_err(&dev->dev, "phy_connect failed\n");
230 return PTR_ERR(phydev);
231 }
232 dev_info(&dev->dev, "attached phy %i to driver %s\n",
233 phydev->addr, phydev->drv->name);
234
235 priv->phydev = phydev;
236
237 return 0;
238}
239
240static int mpc52xx_fec_phy_start(struct net_device *dev)
241{
242 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
243 int err;
244
80791be1 245 if (priv->phy_addr < 0)
5d031e9e
DP		 246 return 0;
247
248 err = mpc52xx_fec_init_phy(dev);
249 if (err) {
250 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
251 return err;
252 }
253
254 /* reset phy - this also wakes it from PDOWN */
255 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
256 phy_start(priv->phydev);
257
258 return 0;
259}
260
261static void mpc52xx_fec_phy_stop(struct net_device *dev)
262{
263 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
264
80791be1 265 if (!priv->phydev)
5d031e9e
DP		 266 return;
267
268 phy_disconnect(priv->phydev);
269 /* power down phy */
270 phy_stop(priv->phydev);
271 phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
272}
273
274static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
275 struct mii_ioctl_data *mii_data, int cmd)
276{
80791be1 277 if (!priv->phydev)
5d031e9e
DP		 278 return -ENOTSUPP;
279
280 return phy_mii_ioctl(priv->phydev, mii_data, cmd);
281}
282
283static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
284{
285 struct mpc52xx_fec __iomem *fec = priv->fec;
286
80791be1 287 if (priv->phydev)
5d031e9e
DP		 288 return;
289
290 out_be32(&fec->mii_speed, priv->phy_speed);
291}
292
293static int mpc52xx_fec_open(struct net_device *dev)
294{
295 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
296 int err = -EBUSY;
297
298 if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
299 DRIVER_NAME "_ctrl", dev)) {
300 dev_err(&dev->dev, "ctrl interrupt request failed\n");
301 goto out;
302 }
303 if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
304 DRIVER_NAME "_rx", dev)) {
305 dev_err(&dev->dev, "rx interrupt request failed\n");
306 goto free_ctrl_irq;
307 }
308 if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
309 DRIVER_NAME "_tx", dev)) {
310 dev_err(&dev->dev, "tx interrupt request failed\n");
311 goto free_2irqs;
312 }
313
314 bcom_fec_rx_reset(priv->rx_dmatsk);
315 bcom_fec_tx_reset(priv->tx_dmatsk);
316
317 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
318 if (err) {
319 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
320 goto free_irqs;
321 }
322
323 err = mpc52xx_fec_phy_start(dev);
324 if (err)
325 goto free_skbs;
326
327 bcom_enable(priv->rx_dmatsk);
328 bcom_enable(priv->tx_dmatsk);
329
330 mpc52xx_fec_start(dev);
331
332 netif_start_queue(dev);
333
334 return 0;
335
336 free_skbs:
337 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
338
339 free_irqs:
340 free_irq(priv->t_irq, dev);
341 free_2irqs:
342 free_irq(priv->r_irq, dev);
343 free_ctrl_irq:
344 free_irq(dev->irq, dev);
345 out:
346
347 return err;
348}
349
350static int mpc52xx_fec_close(struct net_device *dev)
351{
352 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
353
354 netif_stop_queue(dev);
355
356 mpc52xx_fec_stop(dev);
357
358 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
359
360 free_irq(dev->irq, dev);
361 free_irq(priv->r_irq, dev);
362 free_irq(priv->t_irq, dev);
363
364 mpc52xx_fec_phy_stop(dev);
365
366 return 0;
367}
368
369/* This will only be invoked if your driver is _not_ in XOFF state.
370 * What this means is that you need not check it, and that this
371 * invariant will hold if you make sure that the netif_*_queue()
372 * calls are done at the proper times.
373 */
d360009c 374static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
5d031e9e
DP		 375{
376 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
377 struct bcom_fec_bd *bd;
378
379 if (bcom_queue_full(priv->tx_dmatsk)) {
380 if (net_ratelimit())
381 dev_err(&dev->dev, "transmit queue overrun\n");
d360009c 382 return NETDEV_TX_BUSY;
5d031e9e
DP		 383 }
384
385 spin_lock_irq(&priv->lock);
386 dev->trans_start = jiffies;
387
388 bd = (struct bcom_fec_bd *)
389 bcom_prepare_next_buffer(priv->tx_dmatsk);
390
391 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
461cadbc
GL		 392 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
393 DMA_TO_DEVICE);
5d031e9e
DP		 394
395 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
396
397 if (bcom_queue_full(priv->tx_dmatsk)) {
398 netif_stop_queue(dev);
399 }
400
401 spin_unlock_irq(&priv->lock);
402
d360009c 403 return NETDEV_TX_OK;
5d031e9e
DP		 404}
405
bd28bdb1
JS		 406#ifdef CONFIG_NET_POLL_CONTROLLER
407static void mpc52xx_fec_poll_controller(struct net_device *dev)
408{
409 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
410
411 disable_irq(priv->t_irq);
412 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
413 enable_irq(priv->t_irq);
414 disable_irq(priv->r_irq);
415 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
416 enable_irq(priv->r_irq);
417}
418#endif
419
420
5d031e9e
DP		 421/* This handles BestComm transmit task interrupts
422 */
423static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
424{
425 struct net_device *dev = dev_id;
426 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
427
428 spin_lock(&priv->lock);
429
430 while (bcom_buffer_done(priv->tx_dmatsk)) {
431 struct sk_buff *skb;
432 struct bcom_fec_bd *bd;
433 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
434 (struct bcom_bd **)&bd);
461cadbc
GL		 435 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
436 DMA_TO_DEVICE);
5d031e9e
DP		 437
438 dev_kfree_skb_irq(skb);
439 }
440
441 netif_wake_queue(dev);
442
443 spin_unlock(&priv->lock);
444
445 return IRQ_HANDLED;
446}
447
448static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
449{
450 struct net_device *dev = dev_id;
451 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
452
453 while (bcom_buffer_done(priv->rx_dmatsk)) {
454 struct sk_buff *skb;
455 struct sk_buff *rskb;
456 struct bcom_fec_bd *bd;
457 u32 status;
458
459 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
460 (struct bcom_bd **)&bd);
461cadbc
GL		 461 dma_unmap_single(dev->dev.parent, bd->skb_pa, rskb->len,
462 DMA_FROM_DEVICE);
5d031e9e
DP		 463
464 /* Test for errors in received frame */
465 if (status & BCOM_FEC_RX_BD_ERRORS) {
466 /* Drop packet and reuse the buffer */
467 bd = (struct bcom_fec_bd *)
468 bcom_prepare_next_buffer(priv->rx_dmatsk);
469
470 bd->status = FEC_RX_BUFFER_SIZE;
461cadbc
GL		 471 bd->skb_pa = dma_map_single(dev->dev.parent,
472 rskb->data,
5d031e9e
DP		 473 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
474
475 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
476
477 dev->stats.rx_dropped++;
478
479 continue;
480 }
481
482 /* skbs are allocated on open, so now we allocate a new one,
483 * and remove the old (with the packet) */
484 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
485 if (skb) {
486 /* Process the received skb */
487 int length = status & BCOM_FEC_RX_BD_LEN_MASK;
488
489 skb_put(rskb, length - 4); /* length without CRC32 */
490
491 rskb->dev = dev;
492 rskb->protocol = eth_type_trans(rskb, dev);
493
494 netif_rx(rskb);
5d031e9e
DP		 495 } else {
496 /* Can't get a new one : reuse the same & drop pkt */
497 dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
498 dev->stats.rx_dropped++;
499
500 skb = rskb;
501 }
502
503 bd = (struct bcom_fec_bd *)
504 bcom_prepare_next_buffer(priv->rx_dmatsk);
505
506 bd->status = FEC_RX_BUFFER_SIZE;
461cadbc 507 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
5d031e9e
DP		 508 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
509
510 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
511 }
512
513 return IRQ_HANDLED;
514}
515
516static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
517{
518 struct net_device *dev = dev_id;
519 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
520 struct mpc52xx_fec __iomem *fec = priv->fec;
521 u32 ievent;
522
523 ievent = in_be32(&fec->ievent);
524
525 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
526 if (!ievent)
527 return IRQ_NONE;
528
529 out_be32(&fec->ievent, ievent); /* clear pending events */
530
8f3ba2dc
SH		 531 /* on fifo error, soft-reset fec */
532 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
533
534 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
535 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
536 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
537 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
538
539 mpc52xx_fec_reset(dev);
540
541 netif_wake_queue(dev);
5d031e9e
DP		 542 return IRQ_HANDLED;
543 }
544
8f3ba2dc
SH		 545 if (ievent & ~FEC_IEVENT_TFINT)
546 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
5d031e9e 547
5d031e9e
DP		 548 return IRQ_HANDLED;
549}
550
551/*
552 * Get the current statistics.
553 * This may be called with the card open or closed.
554 */
555static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
556{
557 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
558 struct net_device_stats *stats = &dev->stats;
559 struct mpc52xx_fec __iomem *fec = priv->fec;
560
561 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
562 stats->rx_packets = in_be32(&fec->rmon_r_packets);
563 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
564 in_be32(&fec->rmon_r_undersize) +
565 in_be32(&fec->rmon_r_oversize) +
566 in_be32(&fec->rmon_r_frag) +
567 in_be32(&fec->rmon_r_jab);
568
569 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
570 stats->tx_packets = in_be32(&fec->rmon_t_packets);
571 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
572 in_be32(&fec->rmon_t_undersize) +
573 in_be32(&fec->rmon_t_oversize) +
574 in_be32(&fec->rmon_t_frag) +
575 in_be32(&fec->rmon_t_jab);
576
577 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
578 stats->collisions = in_be32(&fec->rmon_t_col);
579
580 /* detailed rx_errors: */
581 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
582 + in_be32(&fec->rmon_r_oversize)
583 + in_be32(&fec->rmon_r_frag)
584 + in_be32(&fec->rmon_r_jab);
585 stats->rx_over_errors = in_be32(&fec->r_macerr);
586 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
587 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
588 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
589 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
590
591 /* detailed tx_errors: */
592 stats->tx_aborted_errors = 0;
593 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
594 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
595 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
596 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
597
598 return stats;
599}
600
601/*
602 * Read MIB counters in order to reset them,
603 * then zero all the stats fields in memory
604 */
605static void mpc52xx_fec_reset_stats(struct net_device *dev)
606{
607 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
608 struct mpc52xx_fec __iomem *fec = priv->fec;
609
610 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
cc154ac6
AV		 611 memset_io(&fec->rmon_t_drop, 0,
612 offsetof(struct mpc52xx_fec, reserved10) -
613 offsetof(struct mpc52xx_fec, rmon_t_drop));
5d031e9e
DP		 614 out_be32(&fec->mib_control, 0);
615
616 memset(&dev->stats, 0, sizeof(dev->stats));
617}
618
619/*
620 * Set or clear the multicast filter for this adaptor.
621 */
622static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
623{
624 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
625 struct mpc52xx_fec __iomem *fec = priv->fec;
626 u32 rx_control;
627
628 rx_control = in_be32(&fec->r_cntrl);
629
630 if (dev->flags & IFF_PROMISC) {
631 rx_control |= FEC_RCNTRL_PROM;
632 out_be32(&fec->r_cntrl, rx_control);
633 } else {
634 rx_control &= ~FEC_RCNTRL_PROM;
635 out_be32(&fec->r_cntrl, rx_control);
636
637 if (dev->flags & IFF_ALLMULTI) {
638 out_be32(&fec->gaddr1, 0xffffffff);
639 out_be32(&fec->gaddr2, 0xffffffff);
640 } else {
641 u32 crc;
642 int i;
643 struct dev_mc_list *dmi;
644 u32 gaddr1 = 0x00000000;
645 u32 gaddr2 = 0x00000000;
646
647 dmi = dev->mc_list;
648 for (i=0; i<dev->mc_count; i++) {
649 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
650 if (crc >= 32)
651 gaddr1 |= 1 << (crc-32);
652 else
653 gaddr2 |= 1 << crc;
654 dmi = dmi->next;
655 }
656 out_be32(&fec->gaddr1, gaddr1);
657 out_be32(&fec->gaddr2, gaddr2);
658 }
659 }
660}
661
662/**
663 * mpc52xx_fec_hw_init
664 * @dev: network device
665 *
666 * Setup various hardware setting, only needed once on start
667 */
668static void mpc52xx_fec_hw_init(struct net_device *dev)
669{
670 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
671 struct mpc52xx_fec __iomem *fec = priv->fec;
672 int i;
673
674 /* Whack a reset. We should wait for this. */
675 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
676 for (i = 0; i < FEC_RESET_DELAY; ++i) {
677 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
678 break;
679 udelay(1);
680 }
681 if (i == FEC_RESET_DELAY)
682 dev_err(&dev->dev, "FEC Reset timeout!\n");
683
684 /* set pause to 0x20 frames */
685 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
686
687 /* high service request will be deasserted when there's < 7 bytes in fifo
688 * low service request will be deasserted when there's < 4*7 bytes in fifo
689 */
690 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
691 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
692
693 /* alarm when <= x bytes in FIFO */
694 out_be32(&fec->rfifo_alarm, 0x0000030c);
695 out_be32(&fec->tfifo_alarm, 0x00000100);
696
697 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
698 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
699
700 /* enable crc generation */
701 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
702 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
703 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
704
705 /* set phy speed.
706 * this can't be done in phy driver, since it needs to be called
707 * before fec stuff (even on resume) */
708 mpc52xx_fec_phy_hw_init(priv);
709}
710
711/**
712 * mpc52xx_fec_start
713 * @dev: network device
714 *
715 * This function is called to start or restart the FEC during a link
716 * change. This happens on fifo errors or when switching between half
717 * and full duplex.
718 */
719static void mpc52xx_fec_start(struct net_device *dev)
720{
721 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
722 struct mpc52xx_fec __iomem *fec = priv->fec;
723 u32 rcntrl;
724 u32 tcntrl;
725 u32 tmp;
726
727 /* clear sticky error bits */
728 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
729 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
730 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
731
732 /* FIFOs will reset on mpc52xx_fec_enable */
733 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
734
735 /* Set station address. */
736 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
737
738 mpc52xx_fec_set_multicast_list(dev);
739
740 /* set max frame len, enable flow control, select mii mode */
741 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
742 rcntrl |= FEC_RCNTRL_FCE;
743
80791be1 744 if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
5d031e9e
DP		 745 rcntrl |= FEC_RCNTRL_MII_MODE;
746
747 if (priv->duplex == DUPLEX_FULL)
748 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
749 else {
750 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
751 tcntrl = 0;
752 }
753 out_be32(&fec->r_cntrl, rcntrl);
754 out_be32(&fec->x_cntrl, tcntrl);
755
756 /* Clear any outstanding interrupt. */
757 out_be32(&fec->ievent, 0xffffffff);
758
759 /* Enable interrupts we wish to service. */
760 out_be32(&fec->imask, FEC_IMASK_ENABLE);
761
762 /* And last, enable the transmit and receive processing. */
763 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
764 out_be32(&fec->r_des_active, 0x01000000);
765}
766
767/**
768 * mpc52xx_fec_stop
769 * @dev: network device
770 *
771 * stop all activity on fec and empty dma buffers
772 */
773static void mpc52xx_fec_stop(struct net_device *dev)
774{
775 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
776 struct mpc52xx_fec __iomem *fec = priv->fec;
777 unsigned long timeout;
778
779 /* disable all interrupts */
780 out_be32(&fec->imask, 0);
781
782 /* Disable the rx task. */
783 bcom_disable(priv->rx_dmatsk);
784
785 /* Wait for tx queue to drain, but only if we're in process context */
786 if (!in_interrupt()) {
787 timeout = jiffies + msecs_to_jiffies(2000);
788 while (time_before(jiffies, timeout) &&
789 !bcom_queue_empty(priv->tx_dmatsk))
790 msleep(100);
791
792 if (time_after_eq(jiffies, timeout))
793 dev_err(&dev->dev, "queues didn't drain\n");
794#if 1
795 if (time_after_eq(jiffies, timeout)) {
796 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
797 priv->tx_dmatsk->index,
798 priv->tx_dmatsk->outdex);
799 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
800 priv->rx_dmatsk->index,
801 priv->rx_dmatsk->outdex);
802 }
803#endif
804 }
805
806 bcom_disable(priv->tx_dmatsk);
807
808 /* Stop FEC */
809 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
810
811 return;
812}
813
814/* reset fec and bestcomm tasks */
815static void mpc52xx_fec_reset(struct net_device *dev)
816{
817 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
818 struct mpc52xx_fec __iomem *fec = priv->fec;
819
820 mpc52xx_fec_stop(dev);
821
822 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
823 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
824
825 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
826
827 mpc52xx_fec_hw_init(dev);
828
829 phy_stop(priv->phydev);
830 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
831 phy_start(priv->phydev);
832
833 bcom_fec_rx_reset(priv->rx_dmatsk);
834 bcom_fec_tx_reset(priv->tx_dmatsk);
835
836 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
837
838 bcom_enable(priv->rx_dmatsk);
839 bcom_enable(priv->tx_dmatsk);
840
841 mpc52xx_fec_start(dev);
842}
843
844
845/* ethtool interface */
846static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
847 struct ethtool_drvinfo *info)
848{
849 strcpy(info->driver, DRIVER_NAME);
850}
851
852static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
853{
854 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
855 return phy_ethtool_gset(priv->phydev, cmd);
856}
857
858static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
859{
860 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
861 return phy_ethtool_sset(priv->phydev, cmd);
862}
863
864static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
865{
866 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
867 return priv->msg_enable;
868}
869
870static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
871{
872 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
873 priv->msg_enable = level;
874}
875
876static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
877 .get_drvinfo = mpc52xx_fec_get_drvinfo,
878 .get_settings = mpc52xx_fec_get_settings,
879 .set_settings = mpc52xx_fec_set_settings,
880 .get_link = ethtool_op_get_link,
881 .get_msglevel = mpc52xx_fec_get_msglevel,
882 .set_msglevel = mpc52xx_fec_set_msglevel,
883};
884
885
886static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
887{
888 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
889
890 return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
891}
892
d360009c
HS		 893static const struct net_device_ops mpc52xx_fec_netdev_ops = {
894 .ndo_open = mpc52xx_fec_open,
895 .ndo_stop = mpc52xx_fec_close,
896 .ndo_start_xmit = mpc52xx_fec_start_xmit,
897 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
898 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
899 .ndo_validate_addr = eth_validate_addr,
900 .ndo_do_ioctl = mpc52xx_fec_ioctl,
901 .ndo_change_mtu = eth_change_mtu,
902 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
903 .ndo_get_stats = mpc52xx_fec_get_stats,
904#ifdef CONFIG_NET_POLL_CONTROLLER
905 .ndo_poll_controller = mpc52xx_fec_poll_controller,
906#endif
907};
908
5d031e9e
DP		 909/* ======================================================================== */
910/* OF Driver */
911/* ======================================================================== */
912
913static int __devinit
914mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
915{
916 int rv;
917 struct net_device *ndev;
918 struct mpc52xx_fec_priv *priv = NULL;
919 struct resource mem;
80791be1
GL		 920 struct device_node *phy_node;
921 const phandle *phy_handle;
922 const u32 *prop;
923 int prop_size;
5d031e9e
DP		 924
925 phys_addr_t rx_fifo;
926 phys_addr_t tx_fifo;
927
928 /* Get the ether ndev & it's private zone */
929 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
930 if (!ndev)
931 return -ENOMEM;
932
933 priv = netdev_priv(ndev);
934
935 /* Reserve FEC control zone */
936 rv = of_address_to_resource(op->node, 0, &mem);
937 if (rv) {
938 printk(KERN_ERR DRIVER_NAME ": "
939 "Error while parsing device node resource\n" );
940 return rv;
941 }
48d58459 942 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
5d031e9e 943 printk(KERN_ERR DRIVER_NAME
48d58459 944 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
5d031e9e
DP		 945 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
946 return -EINVAL;
947 }
948
949 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
950 return -EBUSY;
951
952 /* Init ether ndev with what we have */
d360009c 953 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
5d031e9e 954 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
5d031e9e
DP		 955 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
956 ndev->base_addr = mem.start;
5d031e9e
DP		 957
958 spin_lock_init(&priv->lock);
959
960 /* ioremap the zones */
961 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
962
963 if (!priv->fec) {
964 rv = -ENOMEM;
965 goto probe_error;
966 }
967
968 /* Bestcomm init */
969 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
970 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
971
972 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
973 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
974
975 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
976 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
977 rv = -ENOMEM;
978 goto probe_error;
979 }
980
981 /* Get the IRQ we need one by one */
982 /* Control */
983 ndev->irq = irq_of_parse_and_map(op->node, 0);
984
985 /* RX */
986 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
987
988 /* TX */
989 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
990
991 /* MAC address init */
992 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
993 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
994 else
995 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
996
997 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
5d031e9e 998
80791be1
GL		 999 /*
1000 * Link mode configuration
1001 */
5d031e9e 1002
80791be1
GL		 1003 /* Start with safe defaults for link connection */
1004 priv->phy_addr = FEC5200_PHYADDR_NONE;
1005 priv->speed = 100;
1006 priv->duplex = DUPLEX_HALF;
1007 priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
1008
1009 /* the 7-wire property means don't use MII mode */
1010 if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
1011 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
1012
1013 /* The current speed preconfigures the speed of the MII link */
1014 prop = of_get_property(op->node, "current-speed", &prop_size);
1015 if (prop && (prop_size >= sizeof(u32) * 2)) {
1016 priv->speed = prop[0];
1017 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
1018 }
5d031e9e 1019
80791be1
GL		 1020 /* If there is a phy handle, setup link to that phy */
1021 phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
1022 if (phy_handle && (prop_size >= sizeof(phandle))) {
1023 phy_node = of_find_node_by_phandle(*phy_handle);
1024 prop = of_get_property(phy_node, "reg", &prop_size);
1025 if (prop && (prop_size >= sizeof(u32)))
1026 if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1027 priv->phy_addr = *prop;
1028 of_node_put(phy_node);
5d031e9e
DP		 1029 }
1030
1031 /* Hardware init */
1032 mpc52xx_fec_hw_init(ndev);
1033
1034 mpc52xx_fec_reset_stats(ndev);
1035
3d26e695
DW		 1036 SET_NETDEV_DEV(ndev, &op->dev);
1037
5d031e9e
DP		 1038 /* Register the new network device */
1039 rv = register_netdev(ndev);
1040 if (rv < 0)
1041 goto probe_error;
1042
80791be1
GL		 1043 /* Now report the link setup */
1044 switch (priv->phy_addr) {
1045 case FEC5200_PHYADDR_NONE:
1046 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1047 priv->speed, priv->duplex ? 'F' : 'H');
1048 break;
1049 case FEC5200_PHYADDR_7WIRE:
1050 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1051 break;
1052 default:
1053 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1054 priv->phy_addr);
1055 }
1056
5d031e9e
DP		 1057 /* We're done ! */
1058 dev_set_drvdata(&op->dev, ndev);
1059
1060 return 0;
1061
1062
1063 /* Error handling - free everything that might be allocated */
1064probe_error:
1065
1066 irq_dispose_mapping(ndev->irq);
1067
1068 if (priv->rx_dmatsk)
1069 bcom_fec_rx_release(priv->rx_dmatsk);
1070 if (priv->tx_dmatsk)
1071 bcom_fec_tx_release(priv->tx_dmatsk);
1072
1073 if (priv->fec)
1074 iounmap(priv->fec);
1075
1076 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1077
1078 free_netdev(ndev);
1079
1080 return rv;
1081}
1082
1083static int
1084mpc52xx_fec_remove(struct of_device *op)
1085{
1086 struct net_device *ndev;
1087 struct mpc52xx_fec_priv *priv;
1088
1089 ndev = dev_get_drvdata(&op->dev);
1090 priv = netdev_priv(ndev);
1091
1092 unregister_netdev(ndev);
1093
1094 irq_dispose_mapping(ndev->irq);
1095
1096 bcom_fec_rx_release(priv->rx_dmatsk);
1097 bcom_fec_tx_release(priv->tx_dmatsk);
1098
1099 iounmap(priv->fec);
1100
1101 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1102
1103 free_netdev(ndev);
1104
1105 dev_set_drvdata(&op->dev, NULL);
1106 return 0;
1107}
1108
1109#ifdef CONFIG_PM
1110static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1111{
1112 struct net_device *dev = dev_get_drvdata(&op->dev);
1113
1114 if (netif_running(dev))
1115 mpc52xx_fec_close(dev);
1116
1117 return 0;
1118}
1119
1120static int mpc52xx_fec_of_resume(struct of_device *op)
1121{
1122 struct net_device *dev = dev_get_drvdata(&op->dev);
1123
1124 mpc52xx_fec_hw_init(dev);
1125 mpc52xx_fec_reset_stats(dev);
1126
1127 if (netif_running(dev))
1128 mpc52xx_fec_open(dev);
1129
1130 return 0;
1131}
1132#endif
1133
1134static struct of_device_id mpc52xx_fec_match[] = {
8d813941 1135 { .type = "network", .compatible = "fsl,mpc5200b-fec", },
66ffbe49
GL		 1136 { .type = "network", .compatible = "fsl,mpc5200-fec", },
1137 { .type = "network", .compatible = "mpc5200-fec", },
5d031e9e
DP		 1138 { }
1139};
1140
1141MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1142
1143static struct of_platform_driver mpc52xx_fec_driver = {
1144 .owner = THIS_MODULE,
1145 .name = DRIVER_NAME,
1146 .match_table = mpc52xx_fec_match,
1147 .probe = mpc52xx_fec_probe,
1148 .remove = mpc52xx_fec_remove,
1149#ifdef CONFIG_PM
1150 .suspend = mpc52xx_fec_of_suspend,
1151 .resume = mpc52xx_fec_of_resume,
1152#endif
1153};
1154
1155
1156/* ======================================================================== */
1157/* Module */
1158/* ======================================================================== */
1159
1160static int __init
1161mpc52xx_fec_init(void)
1162{
1163#ifdef CONFIG_FEC_MPC52xx_MDIO
1164 int ret;
1165 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1166 if (ret) {
1167 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1168 return ret;
1169 }
1170#endif
1171 return of_register_platform_driver(&mpc52xx_fec_driver);
1172}
1173
1174static void __exit
1175mpc52xx_fec_exit(void)
1176{
1177 of_unregister_platform_driver(&mpc52xx_fec_driver);
1178#ifdef CONFIG_FEC_MPC52xx_MDIO
1179 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1180#endif
1181}
1182
1183
1184module_init(mpc52xx_fec_init);
1185module_exit(mpc52xx_fec_exit);
1186
1187MODULE_LICENSE("GPL");
1188MODULE_AUTHOR("Dale Farnsworth");
1189MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
Linux kernel - Deliverables
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