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/slab.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/interrupt.h>
26 #include <linux/crc32.h>
27 #include <linux/hardirq.h>
28 #include <linux/delay.h>
29 #include <linux/of_device.h>
30 #include <linux/of_mdio.h>
31 #include <linux/of_platform.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/ethtool.h>
36 #include <linux/skbuff.h>
39 #include <asm/delay.h>
40 #include <asm/mpc52xx.h>
42 #include <sysdev/bestcomm/bestcomm.h>
43 #include <sysdev/bestcomm/fec.h>
45 #include "fec_mpc52xx.h"
47 #define DRIVER_NAME "mpc52xx-fec"
49 /* Private driver data structure */
50 struct mpc52xx_fec_priv {
51 struct net_device *ndev;
56 struct mpc52xx_fec __iomem *fec;
57 struct bcom_task *rx_dmatsk;
58 struct bcom_task *tx_dmatsk;
62 /* MDIO link details */
63 unsigned int mdio_speed;
64 struct device_node *phy_node;
65 struct phy_device *phydev;
71 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
72 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
73 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
74 static void mpc52xx_fec_stop(struct net_device *dev);
75 static void mpc52xx_fec_start(struct net_device *dev);
76 static void mpc52xx_fec_reset(struct net_device *dev);
78 static u8 mpc52xx_fec_mac_addr[6];
79 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
80 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
82 #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
83 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
84 static int debug = -1; /* the above default */
85 module_param(debug, int, 0);
86 MODULE_PARM_DESC(debug, "debugging messages level");
88 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
90 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
93 dev_warn(&dev->dev, "transmit timed out\n");
95 spin_lock_irqsave(&priv->lock, flags);
96 mpc52xx_fec_reset(dev);
97 dev->stats.tx_errors++;
98 spin_unlock_irqrestore(&priv->lock, flags);
100 netif_wake_queue(dev);
103 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
105 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
106 struct mpc52xx_fec __iomem *fec = priv->fec;
108 out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
109 out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
112 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
114 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
115 struct mpc52xx_fec __iomem *fec = priv->fec;
117 *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
118 *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
121 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
123 struct sockaddr *sock = addr;
125 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
127 mpc52xx_fec_set_paddr(dev, sock->sa_data);
131 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
133 while (!bcom_queue_empty(s)) {
134 struct bcom_fec_bd *bd;
137 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
138 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
145 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
147 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
148 struct bcom_fec_bd *bd;
150 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);
151 bd->status = FEC_RX_BUFFER_SIZE;
152 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,
153 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
154 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
157 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
161 while (!bcom_queue_full(rxtsk)) {
162 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
166 /* zero out the initial receive buffers to aid debugging */
167 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
168 mpc52xx_fec_rx_submit(dev, skb);
173 /* based on generic_adjust_link from fs_enet-main.c */
174 static void mpc52xx_fec_adjust_link(struct net_device *dev)
176 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
177 struct phy_device *phydev = priv->phydev;
180 if (phydev->link != PHY_DOWN) {
181 if (phydev->duplex != priv->duplex) {
182 struct mpc52xx_fec __iomem *fec = priv->fec;
187 priv->duplex = phydev->duplex;
189 rcntrl = in_be32(&fec->r_cntrl);
190 tcntrl = in_be32(&fec->x_cntrl);
192 rcntrl &= ~FEC_RCNTRL_DRT;
193 tcntrl &= ~FEC_TCNTRL_FDEN;
194 if (phydev->duplex == DUPLEX_FULL)
195 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
197 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
199 out_be32(&fec->r_cntrl, rcntrl);
200 out_be32(&fec->x_cntrl, tcntrl);
203 if (phydev->speed != priv->speed) {
205 priv->speed = phydev->speed;
208 if (priv->link == PHY_DOWN) {
210 priv->link = phydev->link;
213 } else if (priv->link) {
215 priv->link = PHY_DOWN;
220 if (new_state && netif_msg_link(priv))
221 phy_print_status(phydev);
224 static int mpc52xx_fec_open(struct net_device *dev)
226 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
229 if (priv->phy_node) {
230 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
231 mpc52xx_fec_adjust_link, 0, 0);
233 dev_err(&dev->dev, "of_phy_connect failed\n");
236 phy_start(priv->phydev);
239 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,
240 DRIVER_NAME "_ctrl", dev)) {
241 dev_err(&dev->dev, "ctrl interrupt request failed\n");
244 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,
245 DRIVER_NAME "_rx", dev)) {
246 dev_err(&dev->dev, "rx interrupt request failed\n");
249 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,
250 DRIVER_NAME "_tx", dev)) {
251 dev_err(&dev->dev, "tx interrupt request failed\n");
255 bcom_fec_rx_reset(priv->rx_dmatsk);
256 bcom_fec_tx_reset(priv->tx_dmatsk);
258 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
260 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
264 bcom_enable(priv->rx_dmatsk);
265 bcom_enable(priv->tx_dmatsk);
267 mpc52xx_fec_start(dev);
269 netif_start_queue(dev);
274 free_irq(priv->t_irq, dev);
276 free_irq(priv->r_irq, dev);
278 free_irq(dev->irq, dev);
281 phy_stop(priv->phydev);
282 phy_disconnect(priv->phydev);
289 static int mpc52xx_fec_close(struct net_device *dev)
291 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
293 netif_stop_queue(dev);
295 mpc52xx_fec_stop(dev);
297 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
299 free_irq(dev->irq, dev);
300 free_irq(priv->r_irq, dev);
301 free_irq(priv->t_irq, dev);
305 phy_stop(priv->phydev);
306 phy_disconnect(priv->phydev);
313 /* This will only be invoked if your driver is _not_ in XOFF state.
314 * What this means is that you need not check it, and that this
315 * invariant will hold if you make sure that the netif_*_queue()
316 * calls are done at the proper times.
318 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
320 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
321 struct bcom_fec_bd *bd;
324 if (bcom_queue_full(priv->tx_dmatsk)) {
326 dev_err(&dev->dev, "transmit queue overrun\n");
327 return NETDEV_TX_BUSY;
330 spin_lock_irqsave(&priv->lock, flags);
332 bd = (struct bcom_fec_bd *)
333 bcom_prepare_next_buffer(priv->tx_dmatsk);
335 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
336 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
339 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
340 spin_unlock_irqrestore(&priv->lock, flags);
342 if (bcom_queue_full(priv->tx_dmatsk)) {
343 netif_stop_queue(dev);
349 #ifdef CONFIG_NET_POLL_CONTROLLER
350 static void mpc52xx_fec_poll_controller(struct net_device *dev)
352 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
354 disable_irq(priv->t_irq);
355 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
356 enable_irq(priv->t_irq);
357 disable_irq(priv->r_irq);
358 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
359 enable_irq(priv->r_irq);
364 /* This handles BestComm transmit task interrupts
366 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
368 struct net_device *dev = dev_id;
369 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
371 spin_lock(&priv->lock);
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(&priv->lock);
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;
399 spin_lock(&priv->lock);
401 while (bcom_buffer_done(priv->rx_dmatsk)) {
403 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
404 (struct bcom_bd **)&bd);
405 physaddr = bd->skb_pa;
407 /* Test for errors in received frame */
408 if (status & BCOM_FEC_RX_BD_ERRORS) {
409 /* Drop packet and reuse the buffer */
410 mpc52xx_fec_rx_submit(dev, rskb);
411 dev->stats.rx_dropped++;
415 /* skbs are allocated on open, so now we allocate a new one,
416 * and remove the old (with the packet) */
417 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
419 /* Can't get a new one : reuse the same & drop pkt */
420 dev_notice(&dev->dev, "Low memory - dropped packet.\n");
421 mpc52xx_fec_rx_submit(dev, rskb);
422 dev->stats.rx_dropped++;
426 /* Enqueue the new sk_buff back on the hardware */
427 mpc52xx_fec_rx_submit(dev, skb);
429 /* Process the received skb - Drop the spin lock while
430 * calling into the network stack */
431 spin_unlock(&priv->lock);
433 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
435 length = status & BCOM_FEC_RX_BD_LEN_MASK;
436 skb_put(rskb, length - 4); /* length without CRC32 */
437 rskb->protocol = eth_type_trans(rskb, dev);
440 spin_lock(&priv->lock);
443 spin_unlock(&priv->lock);
448 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
450 struct net_device *dev = dev_id;
451 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
452 struct mpc52xx_fec __iomem *fec = priv->fec;
455 ievent = in_be32(&fec->ievent);
457 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
461 out_be32(&fec->ievent, ievent); /* clear pending events */
463 /* on fifo error, soft-reset fec */
464 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
466 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
467 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
468 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
469 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
471 spin_lock(&priv->lock);
472 mpc52xx_fec_reset(dev);
473 spin_unlock(&priv->lock);
478 if (ievent & ~FEC_IEVENT_TFINT)
479 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
485 * Get the current statistics.
486 * This may be called with the card open or closed.
488 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
490 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
491 struct net_device_stats *stats = &dev->stats;
492 struct mpc52xx_fec __iomem *fec = priv->fec;
494 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
495 stats->rx_packets = in_be32(&fec->rmon_r_packets);
496 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
497 in_be32(&fec->rmon_r_undersize) +
498 in_be32(&fec->rmon_r_oversize) +
499 in_be32(&fec->rmon_r_frag) +
500 in_be32(&fec->rmon_r_jab);
502 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
503 stats->tx_packets = in_be32(&fec->rmon_t_packets);
504 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
505 in_be32(&fec->rmon_t_undersize) +
506 in_be32(&fec->rmon_t_oversize) +
507 in_be32(&fec->rmon_t_frag) +
508 in_be32(&fec->rmon_t_jab);
510 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
511 stats->collisions = in_be32(&fec->rmon_t_col);
513 /* detailed rx_errors: */
514 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
515 + in_be32(&fec->rmon_r_oversize)
516 + in_be32(&fec->rmon_r_frag)
517 + in_be32(&fec->rmon_r_jab);
518 stats->rx_over_errors = in_be32(&fec->r_macerr);
519 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
520 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
521 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
522 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
524 /* detailed tx_errors: */
525 stats->tx_aborted_errors = 0;
526 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
527 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
528 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
529 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
535 * Read MIB counters in order to reset them,
536 * then zero all the stats fields in memory
538 static void mpc52xx_fec_reset_stats(struct net_device *dev)
540 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
541 struct mpc52xx_fec __iomem *fec = priv->fec;
543 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
544 memset_io(&fec->rmon_t_drop, 0,
545 offsetof(struct mpc52xx_fec, reserved10) -
546 offsetof(struct mpc52xx_fec, rmon_t_drop));
547 out_be32(&fec->mib_control, 0);
549 memset(&dev->stats, 0, sizeof(dev->stats));
553 * Set or clear the multicast filter for this adaptor.
555 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
557 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
558 struct mpc52xx_fec __iomem *fec = priv->fec;
561 rx_control = in_be32(&fec->r_cntrl);
563 if (dev->flags & IFF_PROMISC) {
564 rx_control |= FEC_RCNTRL_PROM;
565 out_be32(&fec->r_cntrl, rx_control);
567 rx_control &= ~FEC_RCNTRL_PROM;
568 out_be32(&fec->r_cntrl, rx_control);
570 if (dev->flags & IFF_ALLMULTI) {
571 out_be32(&fec->gaddr1, 0xffffffff);
572 out_be32(&fec->gaddr2, 0xffffffff);
575 struct netdev_hw_addr *ha;
576 u32 gaddr1 = 0x00000000;
577 u32 gaddr2 = 0x00000000;
579 netdev_for_each_mc_addr(ha, dev) {
580 crc = ether_crc_le(6, ha->addr) >> 26;
582 gaddr1 |= 1 << (crc-32);
586 out_be32(&fec->gaddr1, gaddr1);
587 out_be32(&fec->gaddr2, gaddr2);
593 * mpc52xx_fec_hw_init
594 * @dev: network device
596 * Setup various hardware setting, only needed once on start
598 static void mpc52xx_fec_hw_init(struct net_device *dev)
600 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
601 struct mpc52xx_fec __iomem *fec = priv->fec;
604 /* Whack a reset. We should wait for this. */
605 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
606 for (i = 0; i < FEC_RESET_DELAY; ++i) {
607 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
611 if (i == FEC_RESET_DELAY)
612 dev_err(&dev->dev, "FEC Reset timeout!\n");
614 /* set pause to 0x20 frames */
615 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
617 /* high service request will be deasserted when there's < 7 bytes in fifo
618 * low service request will be deasserted when there's < 4*7 bytes in fifo
620 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
621 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
623 /* alarm when <= x bytes in FIFO */
624 out_be32(&fec->rfifo_alarm, 0x0000030c);
625 out_be32(&fec->tfifo_alarm, 0x00000100);
627 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
628 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
630 /* enable crc generation */
631 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
632 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
633 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
636 * this can't be done in phy driver, since it needs to be called
637 * before fec stuff (even on resume) */
638 out_be32(&fec->mii_speed, priv->mdio_speed);
643 * @dev: network device
645 * This function is called to start or restart the FEC during a link
646 * change. This happens on fifo errors or when switching between half
649 static void mpc52xx_fec_start(struct net_device *dev)
651 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
652 struct mpc52xx_fec __iomem *fec = priv->fec;
657 /* clear sticky error bits */
658 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
659 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
660 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
662 /* FIFOs will reset on mpc52xx_fec_enable */
663 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
665 /* Set station address. */
666 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
668 mpc52xx_fec_set_multicast_list(dev);
670 /* set max frame len, enable flow control, select mii mode */
671 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
672 rcntrl |= FEC_RCNTRL_FCE;
674 if (!priv->seven_wire_mode)
675 rcntrl |= FEC_RCNTRL_MII_MODE;
677 if (priv->duplex == DUPLEX_FULL)
678 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
680 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
683 out_be32(&fec->r_cntrl, rcntrl);
684 out_be32(&fec->x_cntrl, tcntrl);
686 /* Clear any outstanding interrupt. */
687 out_be32(&fec->ievent, 0xffffffff);
689 /* Enable interrupts we wish to service. */
690 out_be32(&fec->imask, FEC_IMASK_ENABLE);
692 /* And last, enable the transmit and receive processing. */
693 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
694 out_be32(&fec->r_des_active, 0x01000000);
699 * @dev: network device
701 * stop all activity on fec and empty dma buffers
703 static void mpc52xx_fec_stop(struct net_device *dev)
705 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
706 struct mpc52xx_fec __iomem *fec = priv->fec;
707 unsigned long timeout;
709 /* disable all interrupts */
710 out_be32(&fec->imask, 0);
712 /* Disable the rx task. */
713 bcom_disable(priv->rx_dmatsk);
715 /* Wait for tx queue to drain, but only if we're in process context */
716 if (!in_interrupt()) {
717 timeout = jiffies + msecs_to_jiffies(2000);
718 while (time_before(jiffies, timeout) &&
719 !bcom_queue_empty(priv->tx_dmatsk))
722 if (time_after_eq(jiffies, timeout))
723 dev_err(&dev->dev, "queues didn't drain\n");
725 if (time_after_eq(jiffies, timeout)) {
726 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
727 priv->tx_dmatsk->index,
728 priv->tx_dmatsk->outdex);
729 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
730 priv->rx_dmatsk->index,
731 priv->rx_dmatsk->outdex);
736 bcom_disable(priv->tx_dmatsk);
739 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
742 /* reset fec and bestcomm tasks */
743 static void mpc52xx_fec_reset(struct net_device *dev)
745 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
746 struct mpc52xx_fec __iomem *fec = priv->fec;
748 mpc52xx_fec_stop(dev);
750 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
751 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
753 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
755 mpc52xx_fec_hw_init(dev);
757 bcom_fec_rx_reset(priv->rx_dmatsk);
758 bcom_fec_tx_reset(priv->tx_dmatsk);
760 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
762 bcom_enable(priv->rx_dmatsk);
763 bcom_enable(priv->tx_dmatsk);
765 mpc52xx_fec_start(dev);
767 netif_wake_queue(dev);
771 /* ethtool interface */
773 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
775 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
780 return phy_ethtool_gset(priv->phydev, cmd);
783 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
785 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
790 return phy_ethtool_sset(priv->phydev, cmd);
793 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
795 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
796 return priv->msg_enable;
799 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
801 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
802 priv->msg_enable = level;
805 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
806 .get_settings = mpc52xx_fec_get_settings,
807 .set_settings = mpc52xx_fec_set_settings,
808 .get_link = ethtool_op_get_link,
809 .get_msglevel = mpc52xx_fec_get_msglevel,
810 .set_msglevel = mpc52xx_fec_set_msglevel,
814 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
816 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
821 return phy_mii_ioctl(priv->phydev, rq, cmd);
824 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
825 .ndo_open = mpc52xx_fec_open,
826 .ndo_stop = mpc52xx_fec_close,
827 .ndo_start_xmit = mpc52xx_fec_start_xmit,
828 .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
829 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
830 .ndo_validate_addr = eth_validate_addr,
831 .ndo_do_ioctl = mpc52xx_fec_ioctl,
832 .ndo_change_mtu = eth_change_mtu,
833 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
834 .ndo_get_stats = mpc52xx_fec_get_stats,
835 #ifdef CONFIG_NET_POLL_CONTROLLER
836 .ndo_poll_controller = mpc52xx_fec_poll_controller,
840 /* ======================================================================== */
842 /* ======================================================================== */
844 static int __devinit mpc52xx_fec_probe(struct platform_device *op)
847 struct net_device *ndev;
848 struct mpc52xx_fec_priv *priv = NULL;
856 /* Get the ether ndev & it's private zone */
857 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
861 priv = netdev_priv(ndev);
864 /* Reserve FEC control zone */
865 rv = of_address_to_resource(op->dev.of_node, 0, &mem);
867 printk(KERN_ERR DRIVER_NAME ": "
868 "Error while parsing device node resource\n" );
871 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
872 printk(KERN_ERR DRIVER_NAME
873 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
874 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
879 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),
885 /* Init ether ndev with what we have */
886 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;
887 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
888 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
889 ndev->base_addr = mem.start;
890 SET_NETDEV_DEV(ndev, &op->dev);
892 spin_lock_init(&priv->lock);
894 /* ioremap the zones */
895 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
903 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
904 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
906 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
907 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
909 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
910 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
912 goto err_rx_tx_dmatsk;
915 /* Get the IRQ we need one by one */
917 ndev->irq = irq_of_parse_and_map(op->dev.of_node, 0);
920 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
923 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
925 /* MAC address init */
926 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
927 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
929 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
931 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
934 * Link mode configuration
937 /* Start with safe defaults for link connection */
939 priv->duplex = DUPLEX_HALF;
940 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->dev.of_node) >> 20) / 5) << 1;
942 /* The current speed preconfigures the speed of the MII link */
943 prop = of_get_property(op->dev.of_node, "current-speed", &prop_size);
944 if (prop && (prop_size >= sizeof(u32) * 2)) {
945 priv->speed = prop[0];
946 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
949 /* If there is a phy handle, then get the PHY node */
950 priv->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0);
952 /* the 7-wire property means don't use MII mode */
953 if (of_find_property(op->dev.of_node, "fsl,7-wire-mode", NULL)) {
954 priv->seven_wire_mode = 1;
955 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
959 mpc52xx_fec_hw_init(ndev);
960 mpc52xx_fec_reset_stats(ndev);
962 rv = register_netdev(ndev);
967 dev_set_drvdata(&op->dev, ndev);
972 of_node_put(priv->phy_node);
973 irq_dispose_mapping(ndev->irq);
976 bcom_fec_rx_release(priv->rx_dmatsk);
978 bcom_fec_tx_release(priv->tx_dmatsk);
981 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
989 mpc52xx_fec_remove(struct platform_device *op)
991 struct net_device *ndev;
992 struct mpc52xx_fec_priv *priv;
994 ndev = dev_get_drvdata(&op->dev);
995 priv = netdev_priv(ndev);
997 unregister_netdev(ndev);
1000 of_node_put(priv->phy_node);
1001 priv->phy_node = NULL;
1003 irq_dispose_mapping(ndev->irq);
1005 bcom_fec_rx_release(priv->rx_dmatsk);
1006 bcom_fec_tx_release(priv->tx_dmatsk);
1010 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1014 dev_set_drvdata(&op->dev, NULL);
1019 static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)
1021 struct net_device *dev = dev_get_drvdata(&op->dev);
1023 if (netif_running(dev))
1024 mpc52xx_fec_close(dev);
1029 static int mpc52xx_fec_of_resume(struct platform_device *op)
1031 struct net_device *dev = dev_get_drvdata(&op->dev);
1033 mpc52xx_fec_hw_init(dev);
1034 mpc52xx_fec_reset_stats(dev);
1036 if (netif_running(dev))
1037 mpc52xx_fec_open(dev);
1043 static struct of_device_id mpc52xx_fec_match[] = {
1044 { .compatible = "fsl,mpc5200b-fec", },
1045 { .compatible = "fsl,mpc5200-fec", },
1046 { .compatible = "mpc5200-fec", },
1050 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1052 static struct platform_driver mpc52xx_fec_driver = {
1054 .name = DRIVER_NAME,
1055 .owner = THIS_MODULE,
1056 .of_match_table = mpc52xx_fec_match,
1058 .probe = mpc52xx_fec_probe,
1059 .remove = mpc52xx_fec_remove,
1061 .suspend = mpc52xx_fec_of_suspend,
1062 .resume = mpc52xx_fec_of_resume,
1067 /* ======================================================================== */
1069 /* ======================================================================== */
1072 mpc52xx_fec_init(void)
1074 #ifdef CONFIG_FEC_MPC52xx_MDIO
1076 ret = platform_driver_register(&mpc52xx_fec_mdio_driver);
1078 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1082 return platform_driver_register(&mpc52xx_fec_driver);
1086 mpc52xx_fec_exit(void)
1088 platform_driver_unregister(&mpc52xx_fec_driver);
1089 #ifdef CONFIG_FEC_MPC52xx_MDIO
1090 platform_driver_unregister(&mpc52xx_fec_mdio_driver);
1095 module_init(mpc52xx_fec_init);
1096 module_exit(mpc52xx_fec_exit);
1098 MODULE_LICENSE("GPL");
1099 MODULE_AUTHOR("Dale Farnsworth");
1100 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");