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/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/spinlock.h>
22 #include <linux/errno.h>
23 #include <linux/init.h>
24 #include <linux/crc32.h>
25 #include <linux/hardirq.h>
26 #include <linux/delay.h>
27 #include <linux/of_device.h>
28 #include <linux/of_mdio.h>
29 #include <linux/of_platform.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/ethtool.h>
34 #include <linux/skbuff.h>
37 #include <asm/delay.h>
38 #include <asm/mpc52xx.h>
40 #include <sysdev/bestcomm/bestcomm.h>
41 #include <sysdev/bestcomm/fec.h>
43 #include "fec_mpc52xx.h"
45 #define DRIVER_NAME "mpc52xx-fec"
47 /* Private driver data structure */
48 struct mpc52xx_fec_priv {
49 struct net_device *ndev;
54 struct mpc52xx_fec __iomem *fec;
55 struct bcom_task *rx_dmatsk;
56 struct bcom_task *tx_dmatsk;
60 /* MDIO link details */
61 unsigned int mdio_speed;
62 struct device_node *phy_node;
63 struct phy_device *phydev;
69 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
70 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
71 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
72 static void mpc52xx_fec_stop(struct net_device *dev);
73 static void mpc52xx_fec_start(struct net_device *dev);
74 static void mpc52xx_fec_reset(struct net_device *dev);
76 static u8 mpc52xx_fec_mac_addr[6];
77 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
78 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
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 void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
112 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
113 struct mpc52xx_fec __iomem *fec = priv->fec;
115 *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
116 *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
119 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
121 struct sockaddr *sock = addr;
123 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
125 mpc52xx_fec_set_paddr(dev, sock->sa_data);
129 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
131 while (!bcom_queue_empty(s)) {
132 struct bcom_fec_bd *bd;
135 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
136 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
143 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
145 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
146 struct bcom_fec_bd *bd;
148 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
149 bd->status = FEC_RX_BUFFER_SIZE;
150 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
151 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
152 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
155 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
159 while (!bcom_queue_full(rxtsk)) {
160 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
164 /* zero out the initial receive buffers to aid debugging */
165 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
166 mpc52xx_fec_rx_submit(dev, skb);
171 /* based on generic_adjust_link from fs_enet-main.c */
172 static void mpc52xx_fec_adjust_link(struct net_device *dev)
174 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
175 struct phy_device *phydev = priv->phydev;
178 if (phydev->link != PHY_DOWN) {
179 if (phydev->duplex != priv->duplex) {
180 struct mpc52xx_fec __iomem *fec = priv->fec;
185 priv->duplex = phydev->duplex;
187 rcntrl = in_be32(&fec->r_cntrl);
188 tcntrl = in_be32(&fec->x_cntrl);
190 rcntrl &= ~FEC_RCNTRL_DRT;
191 tcntrl &= ~FEC_TCNTRL_FDEN;
192 if (phydev->duplex == DUPLEX_FULL)
193 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
195 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
197 out_be32(&fec->r_cntrl, rcntrl);
198 out_be32(&fec->x_cntrl, tcntrl);
201 if (phydev->speed != priv->speed) {
203 priv->speed = phydev->speed;
206 if (priv->link == PHY_DOWN) {
208 priv->link = phydev->link;
211 } else if (priv->link) {
213 priv->link = PHY_DOWN;
218 if (new_state && netif_msg_link(priv))
219 phy_print_status(phydev);
222 static int mpc52xx_fec_open(struct net_device *dev)
224 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
227 if (priv->phy_node) {
228 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
229 mpc52xx_fec_adjust_link, 0, 0);
231 dev_err(&dev->dev, "of_phy_connect failed\n");
234 phy_start(priv->phydev);
237 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
238 DRIVER_NAME "_ctrl", dev)) {
239 dev_err(&dev->dev, "ctrl interrupt request failed\n");
242 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
243 DRIVER_NAME "_rx", dev)) {
244 dev_err(&dev->dev, "rx interrupt request failed\n");
247 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
248 DRIVER_NAME "_tx", dev)) {
249 dev_err(&dev->dev, "tx interrupt request failed\n");
253 bcom_fec_rx_reset(priv->rx_dmatsk);
254 bcom_fec_tx_reset(priv->tx_dmatsk);
256 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
258 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
262 bcom_enable(priv->rx_dmatsk);
263 bcom_enable(priv->tx_dmatsk);
265 mpc52xx_fec_start(dev);
267 netif_start_queue(dev);
272 free_irq(priv->t_irq, dev);
274 free_irq(priv->r_irq, dev);
276 free_irq(dev->irq, dev);
279 phy_stop(priv->phydev);
280 phy_disconnect(priv->phydev);
287 static int mpc52xx_fec_close(struct net_device *dev)
289 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
291 netif_stop_queue(dev);
293 mpc52xx_fec_stop(dev);
295 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
297 free_irq(dev->irq, dev);
298 free_irq(priv->r_irq, dev);
299 free_irq(priv->t_irq, dev);
303 phy_stop(priv->phydev);
304 phy_disconnect(priv->phydev);
311 /* This will only be invoked if your driver is _not_ in XOFF state.
312 * What this means is that you need not check it, and that this
313 * invariant will hold if you make sure that the netif_*_queue()
314 * calls are done at the proper times.
316 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
318 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
319 struct bcom_fec_bd *bd;
322 if (bcom_queue_full(priv->tx_dmatsk)) {
324 dev_err(&dev->dev, "transmit queue overrun\n");
325 return NETDEV_TX_BUSY;
328 spin_lock_irqsave(&priv->lock, flags);
329 dev->trans_start = jiffies;
331 bd = (struct bcom_fec_bd *)
332 bcom_prepare_next_buffer(priv->tx_dmatsk);
334 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
335 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
338 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
339 spin_unlock_irqrestore(&priv->lock, flags);
341 if (bcom_queue_full(priv->tx_dmatsk)) {
342 netif_stop_queue(dev);
348 #ifdef CONFIG_NET_POLL_CONTROLLER
349 static void mpc52xx_fec_poll_controller(struct net_device *dev)
351 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
353 disable_irq(priv->t_irq);
354 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
355 enable_irq(priv->t_irq);
356 disable_irq(priv->r_irq);
357 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
358 enable_irq(priv->r_irq);
363 /* This handles BestComm transmit task interrupts
365 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
367 struct net_device *dev = dev_id;
368 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
371 spin_lock_irqsave(&priv->lock, flags);
372 while (bcom_buffer_done(priv->tx_dmatsk)) {
374 struct bcom_fec_bd *bd;
375 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
376 (struct bcom_bd **)&bd);
377 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
380 dev_kfree_skb_irq(skb);
382 spin_unlock_irqrestore(&priv->lock, flags);
384 netif_wake_queue(dev);
389 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
391 struct net_device *dev = dev_id;
392 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
393 struct sk_buff *rskb; /* received sk_buff */
394 struct sk_buff *skb; /* new sk_buff to enqueue in its place */
395 struct bcom_fec_bd *bd;
396 u32 status, physaddr;
400 spin_lock_irqsave(&priv->lock, flags);
402 while (bcom_buffer_done(priv->rx_dmatsk)) {
404 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
405 (struct bcom_bd **)&bd);
406 physaddr = bd->skb_pa;
408 /* Test for errors in received frame */
409 if (status & BCOM_FEC_RX_BD_ERRORS) {
410 /* Drop packet and reuse the buffer */
411 mpc52xx_fec_rx_submit(dev, rskb);
412 dev->stats.rx_dropped++;
416 /* skbs are allocated on open, so now we allocate a new one,
417 * and remove the old (with the packet) */
418 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
420 /* Can't get a new one : reuse the same & drop pkt */
421 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
422 mpc52xx_fec_rx_submit(dev, rskb);
423 dev->stats.rx_dropped++;
427 /* Enqueue the new sk_buff back on the hardware */
428 mpc52xx_fec_rx_submit(dev, skb);
430 /* Process the received skb - Drop the spin lock while
431 * calling into the network stack */
432 spin_unlock_irqrestore(&priv->lock, flags);
434 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
436 length = status & BCOM_FEC_RX_BD_LEN_MASK;
437 skb_put(rskb, length - 4); /* length without CRC32 */
439 rskb->protocol = eth_type_trans(rskb, dev);
442 spin_lock_irqsave(&priv->lock, flags);
445 spin_unlock_irqrestore(&priv->lock, flags);
450 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
452 struct net_device *dev = dev_id;
453 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
454 struct mpc52xx_fec __iomem *fec = priv->fec;
458 ievent = in_be32(&fec->ievent);
460 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
464 out_be32(&fec->ievent, ievent); /* clear pending events */
466 /* on fifo error, soft-reset fec */
467 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
469 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
470 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
471 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
472 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
474 spin_lock_irqsave(&priv->lock, flags);
475 mpc52xx_fec_reset(dev);
476 spin_unlock_irqrestore(&priv->lock, flags);
481 if (ievent & ~FEC_IEVENT_TFINT)
482 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
488 * Get the current statistics.
489 * This may be called with the card open or closed.
491 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
493 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
494 struct net_device_stats *stats = &dev->stats;
495 struct mpc52xx_fec __iomem *fec = priv->fec;
497 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
498 stats->rx_packets = in_be32(&fec->rmon_r_packets);
499 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
500 in_be32(&fec->rmon_r_undersize) +
501 in_be32(&fec->rmon_r_oversize) +
502 in_be32(&fec->rmon_r_frag) +
503 in_be32(&fec->rmon_r_jab);
505 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
506 stats->tx_packets = in_be32(&fec->rmon_t_packets);
507 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
508 in_be32(&fec->rmon_t_undersize) +
509 in_be32(&fec->rmon_t_oversize) +
510 in_be32(&fec->rmon_t_frag) +
511 in_be32(&fec->rmon_t_jab);
513 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
514 stats->collisions = in_be32(&fec->rmon_t_col);
516 /* detailed rx_errors: */
517 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
518 + in_be32(&fec->rmon_r_oversize)
519 + in_be32(&fec->rmon_r_frag)
520 + in_be32(&fec->rmon_r_jab);
521 stats->rx_over_errors = in_be32(&fec->r_macerr);
522 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
523 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
524 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
525 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
527 /* detailed tx_errors: */
528 stats->tx_aborted_errors = 0;
529 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
530 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
531 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
532 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
538 * Read MIB counters in order to reset them,
539 * then zero all the stats fields in memory
541 static void mpc52xx_fec_reset_stats(struct net_device *dev)
543 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
544 struct mpc52xx_fec __iomem *fec = priv->fec;
546 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
547 memset_io(&fec->rmon_t_drop, 0,
548 offsetof(struct mpc52xx_fec, reserved10) -
549 offsetof(struct mpc52xx_fec, rmon_t_drop));
550 out_be32(&fec->mib_control, 0);
552 memset(&dev->stats, 0, sizeof(dev->stats));
556 * Set or clear the multicast filter for this adaptor.
558 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
560 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
561 struct mpc52xx_fec __iomem *fec = priv->fec;
564 rx_control = in_be32(&fec->r_cntrl);
566 if (dev->flags & IFF_PROMISC) {
567 rx_control |= FEC_RCNTRL_PROM;
568 out_be32(&fec->r_cntrl, rx_control);
570 rx_control &= ~FEC_RCNTRL_PROM;
571 out_be32(&fec->r_cntrl, rx_control);
573 if (dev->flags & IFF_ALLMULTI) {
574 out_be32(&fec->gaddr1, 0xffffffff);
575 out_be32(&fec->gaddr2, 0xffffffff);
579 struct dev_mc_list *dmi;
580 u32 gaddr1 = 0x00000000;
581 u32 gaddr2 = 0x00000000;
584 for (i=0; i<dev->mc_count; i++) {
585 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
587 gaddr1 |= 1 << (crc-32);
592 out_be32(&fec->gaddr1, gaddr1);
593 out_be32(&fec->gaddr2, gaddr2);
599 * mpc52xx_fec_hw_init
600 * @dev: network device
602 * Setup various hardware setting, only needed once on start
604 static void mpc52xx_fec_hw_init(struct net_device *dev)
606 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
607 struct mpc52xx_fec __iomem *fec = priv->fec;
610 /* Whack a reset. We should wait for this. */
611 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
612 for (i = 0; i < FEC_RESET_DELAY; ++i) {
613 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
617 if (i == FEC_RESET_DELAY)
618 dev_err(&dev->dev, "FEC Reset timeout!\n");
620 /* set pause to 0x20 frames */
621 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
623 /* high service request will be deasserted when there's < 7 bytes in fifo
624 * low service request will be deasserted when there's < 4*7 bytes in fifo
626 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
627 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
629 /* alarm when <= x bytes in FIFO */
630 out_be32(&fec->rfifo_alarm, 0x0000030c);
631 out_be32(&fec->tfifo_alarm, 0x00000100);
633 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
634 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
636 /* enable crc generation */
637 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
638 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
639 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
642 * this can't be done in phy driver, since it needs to be called
643 * before fec stuff (even on resume) */
644 out_be32(&fec->mii_speed, priv->mdio_speed);
649 * @dev: network device
651 * This function is called to start or restart the FEC during a link
652 * change. This happens on fifo errors or when switching between half
655 static void mpc52xx_fec_start(struct net_device *dev)
657 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
658 struct mpc52xx_fec __iomem *fec = priv->fec;
663 /* clear sticky error bits */
664 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
665 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
666 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
668 /* FIFOs will reset on mpc52xx_fec_enable */
669 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
671 /* Set station address. */
672 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
674 mpc52xx_fec_set_multicast_list(dev);
676 /* set max frame len, enable flow control, select mii mode */
677 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
678 rcntrl |= FEC_RCNTRL_FCE;
680 if (!priv->seven_wire_mode)
681 rcntrl |= FEC_RCNTRL_MII_MODE;
683 if (priv->duplex == DUPLEX_FULL)
684 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
686 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
689 out_be32(&fec->r_cntrl, rcntrl);
690 out_be32(&fec->x_cntrl, tcntrl);
692 /* Clear any outstanding interrupt. */
693 out_be32(&fec->ievent, 0xffffffff);
695 /* Enable interrupts we wish to service. */
696 out_be32(&fec->imask, FEC_IMASK_ENABLE);
698 /* And last, enable the transmit and receive processing. */
699 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
700 out_be32(&fec->r_des_active, 0x01000000);
705 * @dev: network device
707 * stop all activity on fec and empty dma buffers
709 static void mpc52xx_fec_stop(struct net_device *dev)
711 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
712 struct mpc52xx_fec __iomem *fec = priv->fec;
713 unsigned long timeout;
715 /* disable all interrupts */
716 out_be32(&fec->imask, 0);
718 /* Disable the rx task. */
719 bcom_disable(priv->rx_dmatsk);
721 /* Wait for tx queue to drain, but only if we're in process context */
722 if (!in_interrupt()) {
723 timeout = jiffies + msecs_to_jiffies(2000);
724 while (time_before(jiffies, timeout) &&
725 !bcom_queue_empty(priv->tx_dmatsk))
728 if (time_after_eq(jiffies, timeout))
729 dev_err(&dev->dev, "queues didn't drain\n");
731 if (time_after_eq(jiffies, timeout)) {
732 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
733 priv->tx_dmatsk->index,
734 priv->tx_dmatsk->outdex);
735 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
736 priv->rx_dmatsk->index,
737 priv->rx_dmatsk->outdex);
742 bcom_disable(priv->tx_dmatsk);
745 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
748 /* reset fec and bestcomm tasks */
749 static void mpc52xx_fec_reset(struct net_device *dev)
751 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
752 struct mpc52xx_fec __iomem *fec = priv->fec;
754 mpc52xx_fec_stop(dev);
756 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
757 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
759 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
761 mpc52xx_fec_hw_init(dev);
763 bcom_fec_rx_reset(priv->rx_dmatsk);
764 bcom_fec_tx_reset(priv->tx_dmatsk);
766 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
768 bcom_enable(priv->rx_dmatsk);
769 bcom_enable(priv->tx_dmatsk);
771 mpc52xx_fec_start(dev);
773 netif_wake_queue(dev);
777 /* ethtool interface */
778 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
779 struct ethtool_drvinfo *info)
781 strcpy(info->driver, DRIVER_NAME);
784 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
786 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
791 return phy_ethtool_gset(priv->phydev, cmd);
794 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
796 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
801 return phy_ethtool_sset(priv->phydev, cmd);
804 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
806 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
807 return priv->msg_enable;
810 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
812 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
813 priv->msg_enable = level;
816 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
817 .get_drvinfo = mpc52xx_fec_get_drvinfo,
818 .get_settings = mpc52xx_fec_get_settings,
819 .set_settings = mpc52xx_fec_set_settings,
820 .get_link = ethtool_op_get_link,
821 .get_msglevel = mpc52xx_fec_get_msglevel,
822 .set_msglevel = mpc52xx_fec_set_msglevel,
826 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
828 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
833 return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
836 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
837 .ndo_open = mpc52xx_fec_open,
838 .ndo_stop = mpc52xx_fec_close,
839 .ndo_start_xmit = mpc52xx_fec_start_xmit,
840 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
841 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
842 .ndo_validate_addr = eth_validate_addr,
843 .ndo_do_ioctl = mpc52xx_fec_ioctl,
844 .ndo_change_mtu = eth_change_mtu,
845 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
846 .ndo_get_stats = mpc52xx_fec_get_stats,
847 #ifdef CONFIG_NET_POLL_CONTROLLER
848 .ndo_poll_controller = mpc52xx_fec_poll_controller,
852 /* ======================================================================== */
854 /* ======================================================================== */
857 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
860 struct net_device *ndev;
861 struct mpc52xx_fec_priv *priv = NULL;
869 /* Get the ether ndev & it's private zone */
870 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
874 priv = netdev_priv(ndev);
877 /* Reserve FEC control zone */
878 rv = of_address_to_resource(op->node, 0, &mem);
880 printk(KERN_ERR DRIVER_NAME ": "
881 "Error while parsing device node resource\n" );
884 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
885 printk(KERN_ERR DRIVER_NAME
886 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
887 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
891 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
894 /* Init ether ndev with what we have */
895 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
896 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
897 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
898 ndev->base_addr = mem.start;
899 SET_NETDEV_DEV(ndev, &op->dev);
901 spin_lock_init(&priv->lock);
903 /* ioremap the zones */
904 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
912 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
913 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
915 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
916 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
918 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
919 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
924 /* Get the IRQ we need one by one */
926 ndev->irq = irq_of_parse_and_map(op->node, 0);
929 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
932 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
934 /* MAC address init */
935 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
936 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
938 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
940 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
943 * Link mode configuration
946 /* Start with safe defaults for link connection */
948 priv->duplex = DUPLEX_HALF;
949 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
951 /* The current speed preconfigures the speed of the MII link */
952 prop = of_get_property(op->node, "current-speed", &prop_size);
953 if (prop && (prop_size >= sizeof(u32) * 2)) {
954 priv->speed = prop[0];
955 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
958 /* If there is a phy handle, then get the PHY node */
959 priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
961 /* the 7-wire property means don't use MII mode */
962 if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) {
963 priv->seven_wire_mode = 1;
964 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
968 mpc52xx_fec_hw_init(ndev);
969 mpc52xx_fec_reset_stats(ndev);
971 rv = register_netdev(ndev);
976 dev_set_drvdata(&op->dev, ndev);
981 /* Error handling - free everything that might be allocated */
985 of_node_put(priv->phy_node);
986 priv->phy_node = NULL;
988 irq_dispose_mapping(ndev->irq);
991 bcom_fec_rx_release(priv->rx_dmatsk);
993 bcom_fec_tx_release(priv->tx_dmatsk);
998 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1006 mpc52xx_fec_remove(struct of_device *op)
1008 struct net_device *ndev;
1009 struct mpc52xx_fec_priv *priv;
1011 ndev = dev_get_drvdata(&op->dev);
1012 priv = netdev_priv(ndev);
1014 unregister_netdev(ndev);
1017 of_node_put(priv->phy_node);
1018 priv->phy_node = NULL;
1020 irq_dispose_mapping(ndev->irq);
1022 bcom_fec_rx_release(priv->rx_dmatsk);
1023 bcom_fec_tx_release(priv->tx_dmatsk);
1027 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1031 dev_set_drvdata(&op->dev, NULL);
1036 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1038 struct net_device *dev = dev_get_drvdata(&op->dev);
1040 if (netif_running(dev))
1041 mpc52xx_fec_close(dev);
1046 static int mpc52xx_fec_of_resume(struct of_device *op)
1048 struct net_device *dev = dev_get_drvdata(&op->dev);
1050 mpc52xx_fec_hw_init(dev);
1051 mpc52xx_fec_reset_stats(dev);
1053 if (netif_running(dev))
1054 mpc52xx_fec_open(dev);
1060 static struct of_device_id mpc52xx_fec_match[] = {
1061 { .compatible = "fsl,mpc5200b-fec", },
1062 { .compatible = "fsl,mpc5200-fec", },
1063 { .compatible = "mpc5200-fec", },
1067 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1069 static struct of_platform_driver mpc52xx_fec_driver = {
1070 .owner = THIS_MODULE,
1071 .name = DRIVER_NAME,
1072 .match_table = mpc52xx_fec_match,
1073 .probe = mpc52xx_fec_probe,
1074 .remove = mpc52xx_fec_remove,
1076 .suspend = mpc52xx_fec_of_suspend,
1077 .resume = mpc52xx_fec_of_resume,
1082 /* ======================================================================== */
1084 /* ======================================================================== */
1087 mpc52xx_fec_init(void)
1089 #ifdef CONFIG_FEC_MPC52xx_MDIO
1091 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1093 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1097 return of_register_platform_driver(&mpc52xx_fec_driver);
1101 mpc52xx_fec_exit(void)
1103 of_unregister_platform_driver(&mpc52xx_fec_driver);
1104 #ifdef CONFIG_FEC_MPC52xx_MDIO
1105 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1110 module_init(mpc52xx_fec_init);
1111 module_exit(mpc52xx_fec_exit);
1113 MODULE_LICENSE("GPL");
1114 MODULE_AUTHOR("Dale Farnsworth");
1115 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");