2 * Driver for the MPC5200 Fast Ethernet Controller
4 * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
5 * now maintained by Sylvain Munaut <tnt@246tNt.com>
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.
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.
17 #include <linux/dma-mapping.h>
18 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/types.h>
22 #include <linux/spinlock.h>
23 #include <linux/slab.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/crc32.h>
28 #include <linux/hardirq.h>
29 #include <linux/delay.h>
30 #include <linux/of_device.h>
31 #include <linux/of_mdio.h>
32 #include <linux/of_net.h>
33 #include <linux/of_platform.h>
35 #include <linux/netdevice.h>
36 #include <linux/etherdevice.h>
37 #include <linux/ethtool.h>
38 #include <linux/skbuff.h>
41 #include <asm/delay.h>
42 #include <asm/mpc52xx.h>
44 #include <sysdev/bestcomm/bestcomm.h>
45 #include <sysdev/bestcomm/fec.h>
47 #include "fec_mpc52xx.h"
49 #define DRIVER_NAME "mpc52xx-fec"
51 /* Private driver data structure */
52 struct mpc52xx_fec_priv {
53 struct net_device *ndev;
58 struct mpc52xx_fec __iomem *fec;
59 struct bcom_task *rx_dmatsk;
60 struct bcom_task *tx_dmatsk;
64 /* MDIO link details */
65 unsigned int mdio_speed;
66 struct device_node *phy_node;
67 struct phy_device *phydev;
73 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
74 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
75 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
76 static void mpc52xx_fec_stop(struct net_device *dev);
77 static void mpc52xx_fec_start(struct net_device *dev);
78 static void mpc52xx_fec_reset(struct net_device *dev);
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");
86 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
88 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
91 dev_warn(&dev->dev, "transmit timed out\n");
93 spin_lock_irqsave(&priv->lock, flags);
94 mpc52xx_fec_reset(dev);
95 dev->stats.tx_errors++;
96 spin_unlock_irqrestore(&priv->lock, flags);
98 netif_wake_queue(dev);
101 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
103 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
104 struct mpc52xx_fec __iomem *fec = priv->fec;
106 out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
107 out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
110 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
112 struct sockaddr *sock = addr;
114 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
116 mpc52xx_fec_set_paddr(dev, sock->sa_data);
120 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
122 while (!bcom_queue_empty(s)) {
123 struct bcom_fec_bd *bd;
126 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
127 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
134 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
136 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
137 struct bcom_fec_bd *bd;
139 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
140 bd->status = FEC_RX_BUFFER_SIZE;
141 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
142 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
143 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
146 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
150 while (!bcom_queue_full(rxtsk)) {
151 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);
155 /* zero out the initial receive buffers to aid debugging */
156 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
157 mpc52xx_fec_rx_submit(dev, skb);
162 /* based on generic_adjust_link from fs_enet-main.c */
163 static void mpc52xx_fec_adjust_link(struct net_device *dev)
165 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
166 struct phy_device *phydev = priv->phydev;
169 if (phydev->link != PHY_DOWN) {
170 if (phydev->duplex != priv->duplex) {
171 struct mpc52xx_fec __iomem *fec = priv->fec;
176 priv->duplex = phydev->duplex;
178 rcntrl = in_be32(&fec->r_cntrl);
179 tcntrl = in_be32(&fec->x_cntrl);
181 rcntrl &= ~FEC_RCNTRL_DRT;
182 tcntrl &= ~FEC_TCNTRL_FDEN;
183 if (phydev->duplex == DUPLEX_FULL)
184 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
186 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
188 out_be32(&fec->r_cntrl, rcntrl);
189 out_be32(&fec->x_cntrl, tcntrl);
192 if (phydev->speed != priv->speed) {
194 priv->speed = phydev->speed;
197 if (priv->link == PHY_DOWN) {
199 priv->link = phydev->link;
202 } else if (priv->link) {
204 priv->link = PHY_DOWN;
209 if (new_state && netif_msg_link(priv))
210 phy_print_status(phydev);
213 static int mpc52xx_fec_open(struct net_device *dev)
215 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
218 if (priv->phy_node) {
219 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
220 mpc52xx_fec_adjust_link, 0, 0);
222 dev_err(&dev->dev, "of_phy_connect failed\n");
225 phy_start(priv->phydev);
228 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
229 DRIVER_NAME "_ctrl", dev)) {
230 dev_err(&dev->dev, "ctrl interrupt request failed\n");
233 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
234 DRIVER_NAME "_rx", dev)) {
235 dev_err(&dev->dev, "rx interrupt request failed\n");
238 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
239 DRIVER_NAME "_tx", dev)) {
240 dev_err(&dev->dev, "tx interrupt request failed\n");
244 bcom_fec_rx_reset(priv->rx_dmatsk);
245 bcom_fec_tx_reset(priv->tx_dmatsk);
247 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
249 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
253 bcom_enable(priv->rx_dmatsk);
254 bcom_enable(priv->tx_dmatsk);
256 mpc52xx_fec_start(dev);
258 netif_start_queue(dev);
263 free_irq(priv->t_irq, dev);
265 free_irq(priv->r_irq, dev);
267 free_irq(dev->irq, dev);
270 phy_stop(priv->phydev);
271 phy_disconnect(priv->phydev);
278 static int mpc52xx_fec_close(struct net_device *dev)
280 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
282 netif_stop_queue(dev);
284 mpc52xx_fec_stop(dev);
286 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
288 free_irq(dev->irq, dev);
289 free_irq(priv->r_irq, dev);
290 free_irq(priv->t_irq, dev);
294 phy_stop(priv->phydev);
295 phy_disconnect(priv->phydev);
302 /* This will only be invoked if your driver is _not_ in XOFF state.
303 * What this means is that you need not check it, and that this
304 * invariant will hold if you make sure that the netif_*_queue()
305 * calls are done at the proper times.
307 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
309 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
310 struct bcom_fec_bd *bd;
313 if (bcom_queue_full(priv->tx_dmatsk)) {
315 dev_err(&dev->dev, "transmit queue overrun\n");
316 return NETDEV_TX_BUSY;
319 spin_lock_irqsave(&priv->lock, flags);
321 bd = (struct bcom_fec_bd *)
322 bcom_prepare_next_buffer(priv->tx_dmatsk);
324 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
325 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
328 skb_tx_timestamp(skb);
329 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
330 spin_unlock_irqrestore(&priv->lock, flags);
332 if (bcom_queue_full(priv->tx_dmatsk)) {
333 netif_stop_queue(dev);
339 #ifdef CONFIG_NET_POLL_CONTROLLER
340 static void mpc52xx_fec_poll_controller(struct net_device *dev)
342 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
344 disable_irq(priv->t_irq);
345 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
346 enable_irq(priv->t_irq);
347 disable_irq(priv->r_irq);
348 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
349 enable_irq(priv->r_irq);
354 /* This handles BestComm transmit task interrupts
356 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
358 struct net_device *dev = dev_id;
359 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
361 spin_lock(&priv->lock);
362 while (bcom_buffer_done(priv->tx_dmatsk)) {
364 struct bcom_fec_bd *bd;
365 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
366 (struct bcom_bd **)&bd);
367 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
370 dev_kfree_skb_irq(skb);
372 spin_unlock(&priv->lock);
374 netif_wake_queue(dev);
379 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
381 struct net_device *dev = dev_id;
382 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
383 struct sk_buff *rskb; /* received sk_buff */
384 struct sk_buff *skb; /* new sk_buff to enqueue in its place */
385 struct bcom_fec_bd *bd;
386 u32 status, physaddr;
389 spin_lock(&priv->lock);
391 while (bcom_buffer_done(priv->rx_dmatsk)) {
393 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
394 (struct bcom_bd **)&bd);
395 physaddr = bd->skb_pa;
397 /* Test for errors in received frame */
398 if (status & BCOM_FEC_RX_BD_ERRORS) {
399 /* Drop packet and reuse the buffer */
400 mpc52xx_fec_rx_submit(dev, rskb);
401 dev->stats.rx_dropped++;
405 /* skbs are allocated on open, so now we allocate a new one,
406 * and remove the old (with the packet) */
407 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);
409 /* Can't get a new one : reuse the same & drop pkt */
410 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
411 mpc52xx_fec_rx_submit(dev, rskb);
412 dev->stats.rx_dropped++;
416 /* Enqueue the new sk_buff back on the hardware */
417 mpc52xx_fec_rx_submit(dev, skb);
419 /* Process the received skb - Drop the spin lock while
420 * calling into the network stack */
421 spin_unlock(&priv->lock);
423 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
425 length = status & BCOM_FEC_RX_BD_LEN_MASK;
426 skb_put(rskb, length - 4); /* length without CRC32 */
427 rskb->protocol = eth_type_trans(rskb, dev);
428 if (!skb_defer_rx_timestamp(rskb))
431 spin_lock(&priv->lock);
434 spin_unlock(&priv->lock);
439 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
441 struct net_device *dev = dev_id;
442 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
443 struct mpc52xx_fec __iomem *fec = priv->fec;
446 ievent = in_be32(&fec->ievent);
448 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
452 out_be32(&fec->ievent, ievent); /* clear pending events */
454 /* on fifo error, soft-reset fec */
455 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
457 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
458 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
459 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
460 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
462 spin_lock(&priv->lock);
463 mpc52xx_fec_reset(dev);
464 spin_unlock(&priv->lock);
469 if (ievent & ~FEC_IEVENT_TFINT)
470 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
476 * Get the current statistics.
477 * This may be called with the card open or closed.
479 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
481 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
482 struct net_device_stats *stats = &dev->stats;
483 struct mpc52xx_fec __iomem *fec = priv->fec;
485 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
486 stats->rx_packets = in_be32(&fec->rmon_r_packets);
487 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
488 in_be32(&fec->rmon_r_undersize) +
489 in_be32(&fec->rmon_r_oversize) +
490 in_be32(&fec->rmon_r_frag) +
491 in_be32(&fec->rmon_r_jab);
493 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
494 stats->tx_packets = in_be32(&fec->rmon_t_packets);
495 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
496 in_be32(&fec->rmon_t_undersize) +
497 in_be32(&fec->rmon_t_oversize) +
498 in_be32(&fec->rmon_t_frag) +
499 in_be32(&fec->rmon_t_jab);
501 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
502 stats->collisions = in_be32(&fec->rmon_t_col);
504 /* detailed rx_errors: */
505 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
506 + in_be32(&fec->rmon_r_oversize)
507 + in_be32(&fec->rmon_r_frag)
508 + in_be32(&fec->rmon_r_jab);
509 stats->rx_over_errors = in_be32(&fec->r_macerr);
510 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
511 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
512 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
513 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
515 /* detailed tx_errors: */
516 stats->tx_aborted_errors = 0;
517 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
518 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
519 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
520 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
526 * Read MIB counters in order to reset them,
527 * then zero all the stats fields in memory
529 static void mpc52xx_fec_reset_stats(struct net_device *dev)
531 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
532 struct mpc52xx_fec __iomem *fec = priv->fec;
534 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
535 memset_io(&fec->rmon_t_drop, 0,
536 offsetof(struct mpc52xx_fec, reserved10) -
537 offsetof(struct mpc52xx_fec, rmon_t_drop));
538 out_be32(&fec->mib_control, 0);
540 memset(&dev->stats, 0, sizeof(dev->stats));
544 * Set or clear the multicast filter for this adaptor.
546 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
548 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
549 struct mpc52xx_fec __iomem *fec = priv->fec;
552 rx_control = in_be32(&fec->r_cntrl);
554 if (dev->flags & IFF_PROMISC) {
555 rx_control |= FEC_RCNTRL_PROM;
556 out_be32(&fec->r_cntrl, rx_control);
558 rx_control &= ~FEC_RCNTRL_PROM;
559 out_be32(&fec->r_cntrl, rx_control);
561 if (dev->flags & IFF_ALLMULTI) {
562 out_be32(&fec->gaddr1, 0xffffffff);
563 out_be32(&fec->gaddr2, 0xffffffff);
566 struct netdev_hw_addr *ha;
567 u32 gaddr1 = 0x00000000;
568 u32 gaddr2 = 0x00000000;
570 netdev_for_each_mc_addr(ha, dev) {
571 crc = ether_crc_le(6, ha->addr) >> 26;
573 gaddr1 |= 1 << (crc-32);
577 out_be32(&fec->gaddr1, gaddr1);
578 out_be32(&fec->gaddr2, gaddr2);
584 * mpc52xx_fec_hw_init
585 * @dev: network device
587 * Setup various hardware setting, only needed once on start
589 static void mpc52xx_fec_hw_init(struct net_device *dev)
591 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
592 struct mpc52xx_fec __iomem *fec = priv->fec;
595 /* Whack a reset. We should wait for this. */
596 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
597 for (i = 0; i < FEC_RESET_DELAY; ++i) {
598 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
602 if (i == FEC_RESET_DELAY)
603 dev_err(&dev->dev, "FEC Reset timeout!\n");
605 /* set pause to 0x20 frames */
606 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
608 /* high service request will be deasserted when there's < 7 bytes in fifo
609 * low service request will be deasserted when there's < 4*7 bytes in fifo
611 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
612 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
614 /* alarm when <= x bytes in FIFO */
615 out_be32(&fec->rfifo_alarm, 0x0000030c);
616 out_be32(&fec->tfifo_alarm, 0x00000100);
618 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
619 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
621 /* enable crc generation */
622 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
623 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
624 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
627 * this can't be done in phy driver, since it needs to be called
628 * before fec stuff (even on resume) */
629 out_be32(&fec->mii_speed, priv->mdio_speed);
634 * @dev: network device
636 * This function is called to start or restart the FEC during a link
637 * change. This happens on fifo errors or when switching between half
640 static void mpc52xx_fec_start(struct net_device *dev)
642 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
643 struct mpc52xx_fec __iomem *fec = priv->fec;
648 /* clear sticky error bits */
649 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
650 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
651 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
653 /* FIFOs will reset on mpc52xx_fec_enable */
654 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
656 /* Set station address. */
657 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
659 mpc52xx_fec_set_multicast_list(dev);
661 /* set max frame len, enable flow control, select mii mode */
662 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
663 rcntrl |= FEC_RCNTRL_FCE;
665 if (!priv->seven_wire_mode)
666 rcntrl |= FEC_RCNTRL_MII_MODE;
668 if (priv->duplex == DUPLEX_FULL)
669 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
671 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
674 out_be32(&fec->r_cntrl, rcntrl);
675 out_be32(&fec->x_cntrl, tcntrl);
677 /* Clear any outstanding interrupt. */
678 out_be32(&fec->ievent, 0xffffffff);
680 /* Enable interrupts we wish to service. */
681 out_be32(&fec->imask, FEC_IMASK_ENABLE);
683 /* And last, enable the transmit and receive processing. */
684 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
685 out_be32(&fec->r_des_active, 0x01000000);
690 * @dev: network device
692 * stop all activity on fec and empty dma buffers
694 static void mpc52xx_fec_stop(struct net_device *dev)
696 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
697 struct mpc52xx_fec __iomem *fec = priv->fec;
698 unsigned long timeout;
700 /* disable all interrupts */
701 out_be32(&fec->imask, 0);
703 /* Disable the rx task. */
704 bcom_disable(priv->rx_dmatsk);
706 /* Wait for tx queue to drain, but only if we're in process context */
707 if (!in_interrupt()) {
708 timeout = jiffies + msecs_to_jiffies(2000);
709 while (time_before(jiffies, timeout) &&
710 !bcom_queue_empty(priv->tx_dmatsk))
713 if (time_after_eq(jiffies, timeout))
714 dev_err(&dev->dev, "queues didn't drain\n");
716 if (time_after_eq(jiffies, timeout)) {
717 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
718 priv->tx_dmatsk->index,
719 priv->tx_dmatsk->outdex);
720 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
721 priv->rx_dmatsk->index,
722 priv->rx_dmatsk->outdex);
727 bcom_disable(priv->tx_dmatsk);
730 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
733 /* reset fec and bestcomm tasks */
734 static void mpc52xx_fec_reset(struct net_device *dev)
736 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
737 struct mpc52xx_fec __iomem *fec = priv->fec;
739 mpc52xx_fec_stop(dev);
741 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
742 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
744 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
746 mpc52xx_fec_hw_init(dev);
748 bcom_fec_rx_reset(priv->rx_dmatsk);
749 bcom_fec_tx_reset(priv->tx_dmatsk);
751 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
753 bcom_enable(priv->rx_dmatsk);
754 bcom_enable(priv->tx_dmatsk);
756 mpc52xx_fec_start(dev);
758 netif_wake_queue(dev);
762 /* ethtool interface */
764 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
766 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
771 return phy_ethtool_gset(priv->phydev, cmd);
774 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
776 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
781 return phy_ethtool_sset(priv->phydev, cmd);
784 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
786 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
787 return priv->msg_enable;
790 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
792 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
793 priv->msg_enable = level;
796 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
797 .get_settings = mpc52xx_fec_get_settings,
798 .set_settings = mpc52xx_fec_set_settings,
799 .get_link = ethtool_op_get_link,
800 .get_msglevel = mpc52xx_fec_get_msglevel,
801 .set_msglevel = mpc52xx_fec_set_msglevel,
802 .get_ts_info = ethtool_op_get_ts_info,
806 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
808 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
813 return phy_mii_ioctl(priv->phydev, rq, cmd);
816 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
817 .ndo_open = mpc52xx_fec_open,
818 .ndo_stop = mpc52xx_fec_close,
819 .ndo_start_xmit = mpc52xx_fec_start_xmit,
820 .ndo_set_rx_mode = mpc52xx_fec_set_multicast_list,
821 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
822 .ndo_validate_addr = eth_validate_addr,
823 .ndo_do_ioctl = mpc52xx_fec_ioctl,
824 .ndo_change_mtu = eth_change_mtu,
825 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
826 .ndo_get_stats = mpc52xx_fec_get_stats,
827 #ifdef CONFIG_NET_POLL_CONTROLLER
828 .ndo_poll_controller = mpc52xx_fec_poll_controller,
832 /* ======================================================================== */
834 /* ======================================================================== */
836 static int mpc52xx_fec_probe(struct platform_device *op)
839 struct net_device *ndev;
840 struct mpc52xx_fec_priv *priv = NULL;
844 struct device_node *np = op->dev.of_node;
845 const char *mac_addr;
850 /* Get the ether ndev & it's private zone */
851 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
855 priv = netdev_priv(ndev);
858 /* Reserve FEC control zone */
859 rv = of_address_to_resource(np, 0, &mem);
861 printk(KERN_ERR DRIVER_NAME ": "
862 "Error while parsing device node resource\n" );
865 if (resource_size(&mem) < sizeof(struct mpc52xx_fec)) {
866 printk(KERN_ERR DRIVER_NAME
867 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
868 (unsigned long)resource_size(&mem),
869 sizeof(struct mpc52xx_fec));
874 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),
880 /* Init ether ndev with what we have */
881 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
882 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
883 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
884 ndev->base_addr = mem.start;
885 SET_NETDEV_DEV(ndev, &op->dev);
887 spin_lock_init(&priv->lock);
889 /* ioremap the zones */
890 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
898 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
899 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
901 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
902 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
904 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
905 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
907 goto err_rx_tx_dmatsk;
910 /* Get the IRQ we need one by one */
912 ndev->irq = irq_of_parse_and_map(np, 0);
915 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
918 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
923 * First try to read MAC address from DT
925 mac_addr = of_get_mac_address(np);
927 memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
929 struct mpc52xx_fec __iomem *fec = priv->fec;
932 * If the MAC addresse is not provided via DT then read
933 * it back from the controller regs
935 *(u32 *)(&ndev->dev_addr[0]) = in_be32(&fec->paddr1);
936 *(u16 *)(&ndev->dev_addr[4]) = in_be32(&fec->paddr2) >> 16;
940 * Check if the MAC address is valid, if not get a random one
942 if (!is_valid_ether_addr(ndev->dev_addr)) {
943 eth_hw_addr_random(ndev);
944 dev_warn(&ndev->dev, "using random MAC address %pM\n",
948 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
951 * Link mode configuration
954 /* Start with safe defaults for link connection */
956 priv->duplex = DUPLEX_HALF;
957 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(np) >> 20) / 5) << 1;
959 /* The current speed preconfigures the speed of the MII link */
960 prop = of_get_property(np, "current-speed", &prop_size);
961 if (prop && (prop_size >= sizeof(u32) * 2)) {
962 priv->speed = prop[0];
963 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
966 /* If there is a phy handle, then get the PHY node */
967 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
969 /* the 7-wire property means don't use MII mode */
970 if (of_find_property(np, "fsl,7-wire-mode", NULL)) {
971 priv->seven_wire_mode = 1;
972 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
976 mpc52xx_fec_hw_init(ndev);
977 mpc52xx_fec_reset_stats(ndev);
979 rv = register_netdev(ndev);
984 dev_set_drvdata(&op->dev, ndev);
985 printk(KERN_INFO "%s: %s MAC %pM\n",
986 ndev->name, op->dev.of_node->full_name, ndev->dev_addr);
991 of_node_put(priv->phy_node);
992 irq_dispose_mapping(ndev->irq);
995 bcom_fec_rx_release(priv->rx_dmatsk);
997 bcom_fec_tx_release(priv->tx_dmatsk);
1000 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1008 mpc52xx_fec_remove(struct platform_device *op)
1010 struct net_device *ndev;
1011 struct mpc52xx_fec_priv *priv;
1013 ndev = dev_get_drvdata(&op->dev);
1014 priv = netdev_priv(ndev);
1016 unregister_netdev(ndev);
1019 of_node_put(priv->phy_node);
1020 priv->phy_node = NULL;
1022 irq_dispose_mapping(ndev->irq);
1024 bcom_fec_rx_release(priv->rx_dmatsk);
1025 bcom_fec_tx_release(priv->tx_dmatsk);
1029 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1033 dev_set_drvdata(&op->dev, NULL);
1038 static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)
1040 struct net_device *dev = dev_get_drvdata(&op->dev);
1042 if (netif_running(dev))
1043 mpc52xx_fec_close(dev);
1048 static int mpc52xx_fec_of_resume(struct platform_device *op)
1050 struct net_device *dev = dev_get_drvdata(&op->dev);
1052 mpc52xx_fec_hw_init(dev);
1053 mpc52xx_fec_reset_stats(dev);
1055 if (netif_running(dev))
1056 mpc52xx_fec_open(dev);
1062 static struct of_device_id mpc52xx_fec_match[] = {
1063 { .compatible = "fsl,mpc5200b-fec", },
1064 { .compatible = "fsl,mpc5200-fec", },
1065 { .compatible = "mpc5200-fec", },
1069 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1071 static struct platform_driver mpc52xx_fec_driver = {
1073 .name = DRIVER_NAME,
1074 .owner = THIS_MODULE,
1075 .of_match_table = mpc52xx_fec_match,
1077 .probe = mpc52xx_fec_probe,
1078 .remove = mpc52xx_fec_remove,
1080 .suspend = mpc52xx_fec_of_suspend,
1081 .resume = mpc52xx_fec_of_resume,
1086 /* ======================================================================== */
1088 /* ======================================================================== */
1091 mpc52xx_fec_init(void)
1093 #ifdef CONFIG_FEC_MPC52xx_MDIO
1095 ret = platform_driver_register(&mpc52xx_fec_mdio_driver);
1097 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1101 return platform_driver_register(&mpc52xx_fec_driver);
1105 mpc52xx_fec_exit(void)
1107 platform_driver_unregister(&mpc52xx_fec_driver);
1108 #ifdef CONFIG_FEC_MPC52xx_MDIO
1109 platform_driver_unregister(&mpc52xx_fec_mdio_driver);
1114 module_init(mpc52xx_fec_init);
1115 module_exit(mpc52xx_fec_exit);
1117 MODULE_LICENSE("GPL");
1118 MODULE_AUTHOR("Dale Farnsworth");
1119 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");