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_platform.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/ethtool.h>
33 #include <linux/skbuff.h>
36 #include <asm/delay.h>
37 #include <asm/mpc52xx.h>
39 #include <sysdev/bestcomm/bestcomm.h>
40 #include <sysdev/bestcomm/fec.h>
42 #include "fec_mpc52xx.h"
44 #define DRIVER_NAME "mpc52xx-fec"
46 #define FEC5200_PHYADDR_NONE (-1)
47 #define FEC5200_PHYADDR_7WIRE (-2)
49 /* Private driver data structure */
50 struct mpc52xx_fec_priv {
55 struct mpc52xx_fec __iomem *fec;
56 struct bcom_task *rx_dmatsk;
57 struct bcom_task *tx_dmatsk;
61 /* MDIO link details */
63 unsigned int phy_speed;
64 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 dev_warn(&dev->dev, "transmit timed out\n");
90 mpc52xx_fec_reset(dev);
92 dev->stats.tx_errors++;
94 netif_wake_queue(dev);
97 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
99 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
100 struct mpc52xx_fec __iomem *fec = priv->fec;
102 out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
103 out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
106 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
108 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
109 struct mpc52xx_fec __iomem *fec = priv->fec;
111 *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
112 *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
115 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
117 struct sockaddr *sock = addr;
119 memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
121 mpc52xx_fec_set_paddr(dev, sock->sa_data);
125 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
127 while (!bcom_queue_empty(s)) {
128 struct bcom_fec_bd *bd;
131 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
132 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
137 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
139 while (!bcom_queue_full(rxtsk)) {
141 struct bcom_fec_bd *bd;
143 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
147 /* zero out the initial receive buffers to aid debugging */
148 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
150 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
152 bd->status = FEC_RX_BUFFER_SIZE;
153 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
154 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
156 bcom_submit_next_buffer(rxtsk, 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_init_phy(struct net_device *dev)
215 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
216 struct phy_device *phydev;
217 char phy_id[BUS_ID_SIZE];
219 snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
220 (unsigned int)dev->base_addr, priv->phy_addr);
222 priv->link = PHY_DOWN;
226 phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
227 if (IS_ERR(phydev)) {
228 dev_err(&dev->dev, "phy_connect failed\n");
229 return PTR_ERR(phydev);
231 dev_info(&dev->dev, "attached phy %i to driver %s\n",
232 phydev->addr, phydev->drv->name);
234 priv->phydev = phydev;
239 static int mpc52xx_fec_phy_start(struct net_device *dev)
241 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
244 if (priv->phy_addr < 0)
247 err = mpc52xx_fec_init_phy(dev);
249 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
253 /* reset phy - this also wakes it from PDOWN */
254 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
255 phy_start(priv->phydev);
260 static void mpc52xx_fec_phy_stop(struct net_device *dev)
262 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
267 phy_disconnect(priv->phydev);
269 phy_stop(priv->phydev);
270 phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
273 static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
274 struct mii_ioctl_data *mii_data, int cmd)
279 return phy_mii_ioctl(priv->phydev, mii_data, cmd);
282 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
284 struct mpc52xx_fec __iomem *fec = priv->fec;
289 out_be32(&fec->mii_speed, priv->phy_speed);
292 static int mpc52xx_fec_open(struct net_device *dev)
294 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
297 if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
298 DRIVER_NAME "_ctrl", dev)) {
299 dev_err(&dev->dev, "ctrl interrupt request failed\n");
302 if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
303 DRIVER_NAME "_rx", dev)) {
304 dev_err(&dev->dev, "rx interrupt request failed\n");
307 if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
308 DRIVER_NAME "_tx", dev)) {
309 dev_err(&dev->dev, "tx interrupt request failed\n");
313 bcom_fec_rx_reset(priv->rx_dmatsk);
314 bcom_fec_tx_reset(priv->tx_dmatsk);
316 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
318 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
322 err = mpc52xx_fec_phy_start(dev);
326 bcom_enable(priv->rx_dmatsk);
327 bcom_enable(priv->tx_dmatsk);
329 mpc52xx_fec_start(dev);
331 netif_start_queue(dev);
336 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
339 free_irq(priv->t_irq, dev);
341 free_irq(priv->r_irq, dev);
343 free_irq(dev->irq, dev);
349 static int mpc52xx_fec_close(struct net_device *dev)
351 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
353 netif_stop_queue(dev);
355 mpc52xx_fec_stop(dev);
357 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
359 free_irq(dev->irq, dev);
360 free_irq(priv->r_irq, dev);
361 free_irq(priv->t_irq, dev);
363 mpc52xx_fec_phy_stop(dev);
368 /* This will only be invoked if your driver is _not_ in XOFF state.
369 * What this means is that you need not check it, and that this
370 * invariant will hold if you make sure that the netif_*_queue()
371 * calls are done at the proper times.
373 static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
375 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
376 struct bcom_fec_bd *bd;
378 if (bcom_queue_full(priv->tx_dmatsk)) {
380 dev_err(&dev->dev, "transmit queue overrun\n");
384 spin_lock_irq(&priv->lock);
385 dev->trans_start = jiffies;
387 bd = (struct bcom_fec_bd *)
388 bcom_prepare_next_buffer(priv->tx_dmatsk);
390 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
391 bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
393 bcom_submit_next_buffer(priv->tx_dmatsk, skb);
395 if (bcom_queue_full(priv->tx_dmatsk)) {
396 netif_stop_queue(dev);
399 spin_unlock_irq(&priv->lock);
404 /* This handles BestComm transmit task interrupts
406 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
408 struct net_device *dev = dev_id;
409 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
411 spin_lock(&priv->lock);
413 while (bcom_buffer_done(priv->tx_dmatsk)) {
415 struct bcom_fec_bd *bd;
416 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
417 (struct bcom_bd **)&bd);
418 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
420 dev_kfree_skb_irq(skb);
423 netif_wake_queue(dev);
425 spin_unlock(&priv->lock);
430 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
432 struct net_device *dev = dev_id;
433 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
435 while (bcom_buffer_done(priv->rx_dmatsk)) {
437 struct sk_buff *rskb;
438 struct bcom_fec_bd *bd;
441 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
442 (struct bcom_bd **)&bd);
443 dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
445 /* Test for errors in received frame */
446 if (status & BCOM_FEC_RX_BD_ERRORS) {
447 /* Drop packet and reuse the buffer */
448 bd = (struct bcom_fec_bd *)
449 bcom_prepare_next_buffer(priv->rx_dmatsk);
451 bd->status = FEC_RX_BUFFER_SIZE;
452 bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
453 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
455 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
457 dev->stats.rx_dropped++;
462 /* skbs are allocated on open, so now we allocate a new one,
463 * and remove the old (with the packet) */
464 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
466 /* Process the received skb */
467 int length = status & BCOM_FEC_RX_BD_LEN_MASK;
469 skb_put(rskb, length - 4); /* length without CRC32 */
472 rskb->protocol = eth_type_trans(rskb, dev);
475 dev->last_rx = jiffies;
477 /* Can't get a new one : reuse the same & drop pkt */
478 dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
479 dev->stats.rx_dropped++;
484 bd = (struct bcom_fec_bd *)
485 bcom_prepare_next_buffer(priv->rx_dmatsk);
487 bd->status = FEC_RX_BUFFER_SIZE;
488 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
489 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
491 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
497 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
499 struct net_device *dev = dev_id;
500 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
501 struct mpc52xx_fec __iomem *fec = priv->fec;
504 ievent = in_be32(&fec->ievent);
506 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
510 out_be32(&fec->ievent, ievent); /* clear pending events */
512 /* on fifo error, soft-reset fec */
513 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
515 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
516 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
517 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
518 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
520 mpc52xx_fec_reset(dev);
522 netif_wake_queue(dev);
526 if (ievent & ~FEC_IEVENT_TFINT)
527 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
533 * Get the current statistics.
534 * This may be called with the card open or closed.
536 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
538 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
539 struct net_device_stats *stats = &dev->stats;
540 struct mpc52xx_fec __iomem *fec = priv->fec;
542 stats->rx_bytes = in_be32(&fec->rmon_r_octets);
543 stats->rx_packets = in_be32(&fec->rmon_r_packets);
544 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
545 in_be32(&fec->rmon_r_undersize) +
546 in_be32(&fec->rmon_r_oversize) +
547 in_be32(&fec->rmon_r_frag) +
548 in_be32(&fec->rmon_r_jab);
550 stats->tx_bytes = in_be32(&fec->rmon_t_octets);
551 stats->tx_packets = in_be32(&fec->rmon_t_packets);
552 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
553 in_be32(&fec->rmon_t_undersize) +
554 in_be32(&fec->rmon_t_oversize) +
555 in_be32(&fec->rmon_t_frag) +
556 in_be32(&fec->rmon_t_jab);
558 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
559 stats->collisions = in_be32(&fec->rmon_t_col);
561 /* detailed rx_errors: */
562 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
563 + in_be32(&fec->rmon_r_oversize)
564 + in_be32(&fec->rmon_r_frag)
565 + in_be32(&fec->rmon_r_jab);
566 stats->rx_over_errors = in_be32(&fec->r_macerr);
567 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
568 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
569 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
570 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
572 /* detailed tx_errors: */
573 stats->tx_aborted_errors = 0;
574 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
575 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
576 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
577 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
583 * Read MIB counters in order to reset them,
584 * then zero all the stats fields in memory
586 static void mpc52xx_fec_reset_stats(struct net_device *dev)
588 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
589 struct mpc52xx_fec __iomem *fec = priv->fec;
591 out_be32(&fec->mib_control, FEC_MIB_DISABLE);
592 memset_io(&fec->rmon_t_drop, 0,
593 offsetof(struct mpc52xx_fec, reserved10) -
594 offsetof(struct mpc52xx_fec, rmon_t_drop));
595 out_be32(&fec->mib_control, 0);
597 memset(&dev->stats, 0, sizeof(dev->stats));
601 * Set or clear the multicast filter for this adaptor.
603 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
605 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
606 struct mpc52xx_fec __iomem *fec = priv->fec;
609 rx_control = in_be32(&fec->r_cntrl);
611 if (dev->flags & IFF_PROMISC) {
612 rx_control |= FEC_RCNTRL_PROM;
613 out_be32(&fec->r_cntrl, rx_control);
615 rx_control &= ~FEC_RCNTRL_PROM;
616 out_be32(&fec->r_cntrl, rx_control);
618 if (dev->flags & IFF_ALLMULTI) {
619 out_be32(&fec->gaddr1, 0xffffffff);
620 out_be32(&fec->gaddr2, 0xffffffff);
624 struct dev_mc_list *dmi;
625 u32 gaddr1 = 0x00000000;
626 u32 gaddr2 = 0x00000000;
629 for (i=0; i<dev->mc_count; i++) {
630 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
632 gaddr1 |= 1 << (crc-32);
637 out_be32(&fec->gaddr1, gaddr1);
638 out_be32(&fec->gaddr2, gaddr2);
644 * mpc52xx_fec_hw_init
645 * @dev: network device
647 * Setup various hardware setting, only needed once on start
649 static void mpc52xx_fec_hw_init(struct net_device *dev)
651 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
652 struct mpc52xx_fec __iomem *fec = priv->fec;
655 /* Whack a reset. We should wait for this. */
656 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
657 for (i = 0; i < FEC_RESET_DELAY; ++i) {
658 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
662 if (i == FEC_RESET_DELAY)
663 dev_err(&dev->dev, "FEC Reset timeout!\n");
665 /* set pause to 0x20 frames */
666 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
668 /* high service request will be deasserted when there's < 7 bytes in fifo
669 * low service request will be deasserted when there's < 4*7 bytes in fifo
671 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
672 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
674 /* alarm when <= x bytes in FIFO */
675 out_be32(&fec->rfifo_alarm, 0x0000030c);
676 out_be32(&fec->tfifo_alarm, 0x00000100);
678 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
679 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
681 /* enable crc generation */
682 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
683 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
684 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
687 * this can't be done in phy driver, since it needs to be called
688 * before fec stuff (even on resume) */
689 mpc52xx_fec_phy_hw_init(priv);
694 * @dev: network device
696 * This function is called to start or restart the FEC during a link
697 * change. This happens on fifo errors or when switching between half
700 static void mpc52xx_fec_start(struct net_device *dev)
702 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
703 struct mpc52xx_fec __iomem *fec = priv->fec;
708 /* clear sticky error bits */
709 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
710 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
711 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
713 /* FIFOs will reset on mpc52xx_fec_enable */
714 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
716 /* Set station address. */
717 mpc52xx_fec_set_paddr(dev, dev->dev_addr);
719 mpc52xx_fec_set_multicast_list(dev);
721 /* set max frame len, enable flow control, select mii mode */
722 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
723 rcntrl |= FEC_RCNTRL_FCE;
725 if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
726 rcntrl |= FEC_RCNTRL_MII_MODE;
728 if (priv->duplex == DUPLEX_FULL)
729 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
731 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
734 out_be32(&fec->r_cntrl, rcntrl);
735 out_be32(&fec->x_cntrl, tcntrl);
737 /* Clear any outstanding interrupt. */
738 out_be32(&fec->ievent, 0xffffffff);
740 /* Enable interrupts we wish to service. */
741 out_be32(&fec->imask, FEC_IMASK_ENABLE);
743 /* And last, enable the transmit and receive processing. */
744 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
745 out_be32(&fec->r_des_active, 0x01000000);
750 * @dev: network device
752 * stop all activity on fec and empty dma buffers
754 static void mpc52xx_fec_stop(struct net_device *dev)
756 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
757 struct mpc52xx_fec __iomem *fec = priv->fec;
758 unsigned long timeout;
760 /* disable all interrupts */
761 out_be32(&fec->imask, 0);
763 /* Disable the rx task. */
764 bcom_disable(priv->rx_dmatsk);
766 /* Wait for tx queue to drain, but only if we're in process context */
767 if (!in_interrupt()) {
768 timeout = jiffies + msecs_to_jiffies(2000);
769 while (time_before(jiffies, timeout) &&
770 !bcom_queue_empty(priv->tx_dmatsk))
773 if (time_after_eq(jiffies, timeout))
774 dev_err(&dev->dev, "queues didn't drain\n");
776 if (time_after_eq(jiffies, timeout)) {
777 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
778 priv->tx_dmatsk->index,
779 priv->tx_dmatsk->outdex);
780 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
781 priv->rx_dmatsk->index,
782 priv->rx_dmatsk->outdex);
787 bcom_disable(priv->tx_dmatsk);
790 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
795 /* reset fec and bestcomm tasks */
796 static void mpc52xx_fec_reset(struct net_device *dev)
798 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
799 struct mpc52xx_fec __iomem *fec = priv->fec;
801 mpc52xx_fec_stop(dev);
803 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
804 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
806 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
808 mpc52xx_fec_hw_init(dev);
810 phy_stop(priv->phydev);
811 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
812 phy_start(priv->phydev);
814 bcom_fec_rx_reset(priv->rx_dmatsk);
815 bcom_fec_tx_reset(priv->tx_dmatsk);
817 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
819 bcom_enable(priv->rx_dmatsk);
820 bcom_enable(priv->tx_dmatsk);
822 mpc52xx_fec_start(dev);
826 /* ethtool interface */
827 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
828 struct ethtool_drvinfo *info)
830 strcpy(info->driver, DRIVER_NAME);
833 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
835 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
836 return phy_ethtool_gset(priv->phydev, cmd);
839 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
841 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
842 return phy_ethtool_sset(priv->phydev, cmd);
845 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
847 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
848 return priv->msg_enable;
851 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
853 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
854 priv->msg_enable = level;
857 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
858 .get_drvinfo = mpc52xx_fec_get_drvinfo,
859 .get_settings = mpc52xx_fec_get_settings,
860 .set_settings = mpc52xx_fec_set_settings,
861 .get_link = ethtool_op_get_link,
862 .get_msglevel = mpc52xx_fec_get_msglevel,
863 .set_msglevel = mpc52xx_fec_set_msglevel,
867 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
869 struct mpc52xx_fec_priv *priv = netdev_priv(dev);
871 return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
874 /* ======================================================================== */
876 /* ======================================================================== */
879 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
882 struct net_device *ndev;
883 struct mpc52xx_fec_priv *priv = NULL;
885 struct device_node *phy_node;
886 const phandle *phy_handle;
893 /* Get the ether ndev & it's private zone */
894 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
898 priv = netdev_priv(ndev);
900 /* Reserve FEC control zone */
901 rv = of_address_to_resource(op->node, 0, &mem);
903 printk(KERN_ERR DRIVER_NAME ": "
904 "Error while parsing device node resource\n" );
907 if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
908 printk(KERN_ERR DRIVER_NAME
909 " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
910 (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
914 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
917 /* Init ether ndev with what we have */
918 ndev->open = mpc52xx_fec_open;
919 ndev->stop = mpc52xx_fec_close;
920 ndev->hard_start_xmit = mpc52xx_fec_hard_start_xmit;
921 ndev->do_ioctl = mpc52xx_fec_ioctl;
922 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
923 ndev->get_stats = mpc52xx_fec_get_stats;
924 ndev->set_mac_address = mpc52xx_fec_set_mac_address;
925 ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
926 ndev->tx_timeout = mpc52xx_fec_tx_timeout;
927 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
928 ndev->base_addr = mem.start;
930 priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
932 spin_lock_init(&priv->lock);
934 /* ioremap the zones */
935 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
943 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
944 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
946 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
947 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
949 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
950 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
955 /* Get the IRQ we need one by one */
957 ndev->irq = irq_of_parse_and_map(op->node, 0);
960 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
963 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
965 /* MAC address init */
966 if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
967 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
969 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
971 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
974 * Link mode configuration
977 /* Start with safe defaults for link connection */
978 priv->phy_addr = FEC5200_PHYADDR_NONE;
980 priv->duplex = DUPLEX_HALF;
981 priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
983 /* the 7-wire property means don't use MII mode */
984 if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
985 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
987 /* The current speed preconfigures the speed of the MII link */
988 prop = of_get_property(op->node, "current-speed", &prop_size);
989 if (prop && (prop_size >= sizeof(u32) * 2)) {
990 priv->speed = prop[0];
991 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
994 /* If there is a phy handle, setup link to that phy */
995 phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
996 if (phy_handle && (prop_size >= sizeof(phandle))) {
997 phy_node = of_find_node_by_phandle(*phy_handle);
998 prop = of_get_property(phy_node, "reg", &prop_size);
999 if (prop && (prop_size >= sizeof(u32)))
1000 if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1001 priv->phy_addr = *prop;
1002 of_node_put(phy_node);
1006 mpc52xx_fec_hw_init(ndev);
1008 mpc52xx_fec_reset_stats(ndev);
1010 SET_NETDEV_DEV(ndev, &op->dev);
1012 /* Register the new network device */
1013 rv = register_netdev(ndev);
1017 /* Now report the link setup */
1018 switch (priv->phy_addr) {
1019 case FEC5200_PHYADDR_NONE:
1020 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1021 priv->speed, priv->duplex ? 'F' : 'H');
1023 case FEC5200_PHYADDR_7WIRE:
1024 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1027 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1032 dev_set_drvdata(&op->dev, ndev);
1037 /* Error handling - free everything that might be allocated */
1040 irq_dispose_mapping(ndev->irq);
1042 if (priv->rx_dmatsk)
1043 bcom_fec_rx_release(priv->rx_dmatsk);
1044 if (priv->tx_dmatsk)
1045 bcom_fec_tx_release(priv->tx_dmatsk);
1050 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1058 mpc52xx_fec_remove(struct of_device *op)
1060 struct net_device *ndev;
1061 struct mpc52xx_fec_priv *priv;
1063 ndev = dev_get_drvdata(&op->dev);
1064 priv = netdev_priv(ndev);
1066 unregister_netdev(ndev);
1068 irq_dispose_mapping(ndev->irq);
1070 bcom_fec_rx_release(priv->rx_dmatsk);
1071 bcom_fec_tx_release(priv->tx_dmatsk);
1075 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1079 dev_set_drvdata(&op->dev, NULL);
1084 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1086 struct net_device *dev = dev_get_drvdata(&op->dev);
1088 if (netif_running(dev))
1089 mpc52xx_fec_close(dev);
1094 static int mpc52xx_fec_of_resume(struct of_device *op)
1096 struct net_device *dev = dev_get_drvdata(&op->dev);
1098 mpc52xx_fec_hw_init(dev);
1099 mpc52xx_fec_reset_stats(dev);
1101 if (netif_running(dev))
1102 mpc52xx_fec_open(dev);
1108 static struct of_device_id mpc52xx_fec_match[] = {
1109 { .type = "network", .compatible = "fsl,mpc5200b-fec", },
1110 { .type = "network", .compatible = "fsl,mpc5200-fec", },
1111 { .type = "network", .compatible = "mpc5200-fec", },
1115 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1117 static struct of_platform_driver mpc52xx_fec_driver = {
1118 .owner = THIS_MODULE,
1119 .name = DRIVER_NAME,
1120 .match_table = mpc52xx_fec_match,
1121 .probe = mpc52xx_fec_probe,
1122 .remove = mpc52xx_fec_remove,
1124 .suspend = mpc52xx_fec_of_suspend,
1125 .resume = mpc52xx_fec_of_resume,
1130 /* ======================================================================== */
1132 /* ======================================================================== */
1135 mpc52xx_fec_init(void)
1137 #ifdef CONFIG_FEC_MPC52xx_MDIO
1139 ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1141 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1145 return of_register_platform_driver(&mpc52xx_fec_driver);
1149 mpc52xx_fec_exit(void)
1151 of_unregister_platform_driver(&mpc52xx_fec_driver);
1152 #ifdef CONFIG_FEC_MPC52xx_MDIO
1153 of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1158 module_init(mpc52xx_fec_init);
1159 module_exit(mpc52xx_fec_exit);
1161 MODULE_LICENSE("GPL");
1162 MODULE_AUTHOR("Dale Farnsworth");
1163 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");