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1/*2 * Driver for the MPC5200 Fast Ethernet Controller3 *4 * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and5 * now maintained by Sylvain Munaut <tnt@246tNt.com>6 *7 * Copyright (C) 2007 Domen Puncer, Telargo, Inc.8 * Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>9 * Copyright (C) 2003-2004 MontaVista, Software, Inc.10 *11 * This file is licensed under the terms of the GNU General Public License12 * version 2. This program is licensed "as is" without any warranty of any13 * kind, whether express or implied.14 *15 */16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt18 19#include <linux/dma-mapping.h>20#include <linux/module.h>21 22#include <linux/kernel.h>23#include <linux/types.h>24#include <linux/spinlock.h>25#include <linux/slab.h>26#include <linux/errno.h>27#include <linux/init.h>28#include <linux/interrupt.h>29#include <linux/crc32.h>30#include <linux/hardirq.h>31#include <linux/delay.h>32#include <linux/of.h>33#include <linux/of_address.h>34#include <linux/of_irq.h>35#include <linux/of_mdio.h>36#include <linux/of_net.h>37#include <linux/platform_device.h>38 39#include <linux/netdevice.h>40#include <linux/etherdevice.h>41#include <linux/ethtool.h>42#include <linux/skbuff.h>43 44#include <asm/io.h>45#include <asm/delay.h>46#include <asm/mpc52xx.h>47 48#include <linux/fsl/bestcomm/bestcomm.h>49#include <linux/fsl/bestcomm/fec.h>50 51#include "fec_mpc52xx.h"52 53#define DRIVER_NAME "mpc52xx-fec"54 55/* Private driver data structure */56struct mpc52xx_fec_priv {57 struct net_device *ndev;58 int duplex;59 int speed;60 int r_irq;61 int t_irq;62 struct mpc52xx_fec __iomem *fec;63 struct bcom_task *rx_dmatsk;64 struct bcom_task *tx_dmatsk;65 spinlock_t lock;66 int msg_enable;67 68 /* MDIO link details */69 unsigned int mdio_speed;70 struct device_node *phy_node;71 enum phy_state link;72 int seven_wire_mode;73};74 75 76static irqreturn_t mpc52xx_fec_interrupt(int, void *);77static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);78static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);79static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep);80static void mpc52xx_fec_start(struct net_device *dev);81static void mpc52xx_fec_reset(struct net_device *dev);82 83#define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \84 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)85static int debug = -1; /* the above default */86module_param(debug, int, 0);87MODULE_PARM_DESC(debug, "debugging messages level");88 89static void mpc52xx_fec_tx_timeout(struct net_device *dev, unsigned int txqueue)90{91 struct mpc52xx_fec_priv *priv = netdev_priv(dev);92 unsigned long flags;93 94 dev_warn(&dev->dev, "transmit timed out\n");95 96 spin_lock_irqsave(&priv->lock, flags);97 mpc52xx_fec_reset(dev);98 dev->stats.tx_errors++;99 spin_unlock_irqrestore(&priv->lock, flags);100 101 netif_wake_queue(dev);102}103 104static void mpc52xx_fec_set_paddr(struct net_device *dev, const u8 *mac)105{106 struct mpc52xx_fec_priv *priv = netdev_priv(dev);107 struct mpc52xx_fec __iomem *fec = priv->fec;108 109 out_be32(&fec->paddr1, *(const u32 *)(&mac[0]));110 out_be32(&fec->paddr2, (*(const u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);111}112 113static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)114{115 struct sockaddr *sock = addr;116 117 eth_hw_addr_set(dev, sock->sa_data);118 119 mpc52xx_fec_set_paddr(dev, sock->sa_data);120 return 0;121}122 123static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)124{125 while (!bcom_queue_empty(s)) {126 struct bcom_fec_bd *bd;127 struct sk_buff *skb;128 129 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);130 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,131 DMA_FROM_DEVICE);132 kfree_skb(skb);133 }134}135 136static void137mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)138{139 struct mpc52xx_fec_priv *priv = netdev_priv(dev);140 struct bcom_fec_bd *bd;141 142 bd = (struct bcom_fec_bd *) bcom_prepare_next_buffer(priv->rx_dmatsk);143 bd->status = FEC_RX_BUFFER_SIZE;144 bd->skb_pa = dma_map_single(dev->dev.parent, rskb->data,145 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);146 bcom_submit_next_buffer(priv->rx_dmatsk, rskb);147}148 149static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)150{151 struct sk_buff *skb;152 153 while (!bcom_queue_full(rxtsk)) {154 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);155 if (!skb)156 return -EAGAIN;157 158 /* zero out the initial receive buffers to aid debugging */159 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);160 mpc52xx_fec_rx_submit(dev, skb);161 }162 return 0;163}164 165/* based on generic_adjust_link from fs_enet-main.c */166static void mpc52xx_fec_adjust_link(struct net_device *dev)167{168 struct mpc52xx_fec_priv *priv = netdev_priv(dev);169 struct phy_device *phydev = dev->phydev;170 int new_state = 0;171 172 if (phydev->link != PHY_DOWN) {173 if (phydev->duplex != priv->duplex) {174 struct mpc52xx_fec __iomem *fec = priv->fec;175 u32 rcntrl;176 u32 tcntrl;177 178 new_state = 1;179 priv->duplex = phydev->duplex;180 181 rcntrl = in_be32(&fec->r_cntrl);182 tcntrl = in_be32(&fec->x_cntrl);183 184 rcntrl &= ~FEC_RCNTRL_DRT;185 tcntrl &= ~FEC_TCNTRL_FDEN;186 if (phydev->duplex == DUPLEX_FULL)187 tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */188 else189 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */190 191 out_be32(&fec->r_cntrl, rcntrl);192 out_be32(&fec->x_cntrl, tcntrl);193 }194 195 if (phydev->speed != priv->speed) {196 new_state = 1;197 priv->speed = phydev->speed;198 }199 200 if (priv->link == PHY_DOWN) {201 new_state = 1;202 priv->link = phydev->link;203 }204 205 } else if (priv->link) {206 new_state = 1;207 priv->link = PHY_DOWN;208 priv->speed = 0;209 priv->duplex = -1;210 }211 212 if (new_state && netif_msg_link(priv))213 phy_print_status(phydev);214}215 216static int mpc52xx_fec_open(struct net_device *dev)217{218 struct mpc52xx_fec_priv *priv = netdev_priv(dev);219 struct phy_device *phydev = NULL;220 int err = -EBUSY;221 222 if (priv->phy_node) {223 phydev = of_phy_connect(priv->ndev, priv->phy_node,224 mpc52xx_fec_adjust_link, 0, 0);225 if (!phydev) {226 dev_err(&dev->dev, "of_phy_connect failed\n");227 return -ENODEV;228 }229 phy_start(phydev);230 }231 232 if (request_irq(dev->irq, mpc52xx_fec_interrupt, IRQF_SHARED,233 DRIVER_NAME "_ctrl", dev)) {234 dev_err(&dev->dev, "ctrl interrupt request failed\n");235 goto free_phy;236 }237 if (request_irq(priv->r_irq, mpc52xx_fec_rx_interrupt, 0,238 DRIVER_NAME "_rx", dev)) {239 dev_err(&dev->dev, "rx interrupt request failed\n");240 goto free_ctrl_irq;241 }242 if (request_irq(priv->t_irq, mpc52xx_fec_tx_interrupt, 0,243 DRIVER_NAME "_tx", dev)) {244 dev_err(&dev->dev, "tx interrupt request failed\n");245 goto free_2irqs;246 }247 248 bcom_fec_rx_reset(priv->rx_dmatsk);249 bcom_fec_tx_reset(priv->tx_dmatsk);250 251 err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);252 if (err) {253 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");254 goto free_irqs;255 }256 257 bcom_enable(priv->rx_dmatsk);258 bcom_enable(priv->tx_dmatsk);259 260 mpc52xx_fec_start(dev);261 262 netif_start_queue(dev);263 264 return 0;265 266 free_irqs:267 free_irq(priv->t_irq, dev);268 free_2irqs:269 free_irq(priv->r_irq, dev);270 free_ctrl_irq:271 free_irq(dev->irq, dev);272 free_phy:273 if (phydev) {274 phy_stop(phydev);275 phy_disconnect(phydev);276 }277 278 return err;279}280 281static int mpc52xx_fec_close(struct net_device *dev)282{283 struct mpc52xx_fec_priv *priv = netdev_priv(dev);284 struct phy_device *phydev = dev->phydev;285 286 netif_stop_queue(dev);287 288 mpc52xx_fec_stop(dev, true);289 290 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);291 292 free_irq(dev->irq, dev);293 free_irq(priv->r_irq, dev);294 free_irq(priv->t_irq, dev);295 296 if (phydev) {297 /* power down phy */298 phy_stop(phydev);299 phy_disconnect(phydev);300 }301 302 return 0;303}304 305/* This will only be invoked if your driver is _not_ in XOFF state.306 * What this means is that you need not check it, and that this307 * invariant will hold if you make sure that the netif_*_queue()308 * calls are done at the proper times.309 */310static netdev_tx_t311mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)312{313 struct mpc52xx_fec_priv *priv = netdev_priv(dev);314 struct bcom_fec_bd *bd;315 unsigned long flags;316 317 if (bcom_queue_full(priv->tx_dmatsk)) {318 if (net_ratelimit())319 dev_err(&dev->dev, "transmit queue overrun\n");320 return NETDEV_TX_BUSY;321 }322 323 spin_lock_irqsave(&priv->lock, flags);324 325 bd = (struct bcom_fec_bd *)326 bcom_prepare_next_buffer(priv->tx_dmatsk);327 328 bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;329 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,330 DMA_TO_DEVICE);331 332 skb_tx_timestamp(skb);333 bcom_submit_next_buffer(priv->tx_dmatsk, skb);334 spin_unlock_irqrestore(&priv->lock, flags);335 336 if (bcom_queue_full(priv->tx_dmatsk)) {337 netif_stop_queue(dev);338 }339 340 return NETDEV_TX_OK;341}342 343#ifdef CONFIG_NET_POLL_CONTROLLER344static void mpc52xx_fec_poll_controller(struct net_device *dev)345{346 struct mpc52xx_fec_priv *priv = netdev_priv(dev);347 348 disable_irq(priv->t_irq);349 mpc52xx_fec_tx_interrupt(priv->t_irq, dev);350 enable_irq(priv->t_irq);351 disable_irq(priv->r_irq);352 mpc52xx_fec_rx_interrupt(priv->r_irq, dev);353 enable_irq(priv->r_irq);354}355#endif356 357 358/* This handles BestComm transmit task interrupts359 */360static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)361{362 struct net_device *dev = dev_id;363 struct mpc52xx_fec_priv *priv = netdev_priv(dev);364 365 spin_lock(&priv->lock);366 while (bcom_buffer_done(priv->tx_dmatsk)) {367 struct sk_buff *skb;368 struct bcom_fec_bd *bd;369 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,370 (struct bcom_bd **)&bd);371 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,372 DMA_TO_DEVICE);373 374 dev_consume_skb_irq(skb);375 }376 spin_unlock(&priv->lock);377 378 netif_wake_queue(dev);379 380 return IRQ_HANDLED;381}382 383static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)384{385 struct net_device *dev = dev_id;386 struct mpc52xx_fec_priv *priv = netdev_priv(dev);387 struct sk_buff *rskb; /* received sk_buff */388 struct sk_buff *skb; /* new sk_buff to enqueue in its place */389 struct bcom_fec_bd *bd;390 u32 status, physaddr;391 int length;392 393 spin_lock(&priv->lock);394 395 while (bcom_buffer_done(priv->rx_dmatsk)) {396 397 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,398 (struct bcom_bd **)&bd);399 physaddr = bd->skb_pa;400 401 /* Test for errors in received frame */402 if (status & BCOM_FEC_RX_BD_ERRORS) {403 /* Drop packet and reuse the buffer */404 mpc52xx_fec_rx_submit(dev, rskb);405 dev->stats.rx_dropped++;406 continue;407 }408 409 /* skbs are allocated on open, so now we allocate a new one,410 * and remove the old (with the packet) */411 skb = netdev_alloc_skb(dev, FEC_RX_BUFFER_SIZE);412 if (!skb) {413 /* Can't get a new one : reuse the same & drop pkt */414 dev_notice(&dev->dev, "Low memory - dropped packet.\n");415 mpc52xx_fec_rx_submit(dev, rskb);416 dev->stats.rx_dropped++;417 continue;418 }419 420 /* Enqueue the new sk_buff back on the hardware */421 mpc52xx_fec_rx_submit(dev, skb);422 423 /* Process the received skb - Drop the spin lock while424 * calling into the network stack */425 spin_unlock(&priv->lock);426 427 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,428 DMA_FROM_DEVICE);429 length = status & BCOM_FEC_RX_BD_LEN_MASK;430 skb_put(rskb, length - 4); /* length without CRC32 */431 rskb->protocol = eth_type_trans(rskb, dev);432 if (!skb_defer_rx_timestamp(rskb))433 netif_rx(rskb);434 435 spin_lock(&priv->lock);436 }437 438 spin_unlock(&priv->lock);439 440 return IRQ_HANDLED;441}442 443static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)444{445 struct net_device *dev = dev_id;446 struct mpc52xx_fec_priv *priv = netdev_priv(dev);447 struct mpc52xx_fec __iomem *fec = priv->fec;448 u32 ievent;449 450 ievent = in_be32(&fec->ievent);451 452 ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */453 if (!ievent)454 return IRQ_NONE;455 456 out_be32(&fec->ievent, ievent); /* clear pending events */457 458 /* on fifo error, soft-reset fec */459 if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {460 461 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))462 dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");463 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))464 dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");465 466 spin_lock(&priv->lock);467 mpc52xx_fec_reset(dev);468 spin_unlock(&priv->lock);469 470 return IRQ_HANDLED;471 }472 473 if (ievent & ~FEC_IEVENT_TFINT)474 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);475 476 return IRQ_HANDLED;477}478 479/*480 * Get the current statistics.481 * This may be called with the card open or closed.482 */483static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)484{485 struct mpc52xx_fec_priv *priv = netdev_priv(dev);486 struct net_device_stats *stats = &dev->stats;487 struct mpc52xx_fec __iomem *fec = priv->fec;488 489 stats->rx_bytes = in_be32(&fec->rmon_r_octets);490 stats->rx_packets = in_be32(&fec->rmon_r_packets);491 stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +492 in_be32(&fec->rmon_r_undersize) +493 in_be32(&fec->rmon_r_oversize) +494 in_be32(&fec->rmon_r_frag) +495 in_be32(&fec->rmon_r_jab);496 497 stats->tx_bytes = in_be32(&fec->rmon_t_octets);498 stats->tx_packets = in_be32(&fec->rmon_t_packets);499 stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +500 in_be32(&fec->rmon_t_undersize) +501 in_be32(&fec->rmon_t_oversize) +502 in_be32(&fec->rmon_t_frag) +503 in_be32(&fec->rmon_t_jab);504 505 stats->multicast = in_be32(&fec->rmon_r_mc_pkt);506 stats->collisions = in_be32(&fec->rmon_t_col);507 508 /* detailed rx_errors: */509 stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)510 + in_be32(&fec->rmon_r_oversize)511 + in_be32(&fec->rmon_r_frag)512 + in_be32(&fec->rmon_r_jab);513 stats->rx_over_errors = in_be32(&fec->r_macerr);514 stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);515 stats->rx_frame_errors = in_be32(&fec->ieee_r_align);516 stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);517 stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);518 519 /* detailed tx_errors: */520 stats->tx_aborted_errors = 0;521 stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);522 stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);523 stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);524 stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);525 526 return stats;527}528 529/*530 * Read MIB counters in order to reset them,531 * then zero all the stats fields in memory532 */533static void mpc52xx_fec_reset_stats(struct net_device *dev)534{535 struct mpc52xx_fec_priv *priv = netdev_priv(dev);536 struct mpc52xx_fec __iomem *fec = priv->fec;537 538 out_be32(&fec->mib_control, FEC_MIB_DISABLE);539 memset_io(&fec->rmon_t_drop, 0,540 offsetof(struct mpc52xx_fec, reserved10) -541 offsetof(struct mpc52xx_fec, rmon_t_drop));542 out_be32(&fec->mib_control, 0);543 544 memset(&dev->stats, 0, sizeof(dev->stats));545}546 547/*548 * Set or clear the multicast filter for this adaptor.549 */550static void mpc52xx_fec_set_multicast_list(struct net_device *dev)551{552 struct mpc52xx_fec_priv *priv = netdev_priv(dev);553 struct mpc52xx_fec __iomem *fec = priv->fec;554 u32 rx_control;555 556 rx_control = in_be32(&fec->r_cntrl);557 558 if (dev->flags & IFF_PROMISC) {559 rx_control |= FEC_RCNTRL_PROM;560 out_be32(&fec->r_cntrl, rx_control);561 } else {562 rx_control &= ~FEC_RCNTRL_PROM;563 out_be32(&fec->r_cntrl, rx_control);564 565 if (dev->flags & IFF_ALLMULTI) {566 out_be32(&fec->gaddr1, 0xffffffff);567 out_be32(&fec->gaddr2, 0xffffffff);568 } else {569 u32 crc;570 struct netdev_hw_addr *ha;571 u32 gaddr1 = 0x00000000;572 u32 gaddr2 = 0x00000000;573 574 netdev_for_each_mc_addr(ha, dev) {575 crc = ether_crc_le(6, ha->addr) >> 26;576 if (crc >= 32)577 gaddr1 |= 1 << (crc-32);578 else579 gaddr2 |= 1 << crc;580 }581 out_be32(&fec->gaddr1, gaddr1);582 out_be32(&fec->gaddr2, gaddr2);583 }584 }585}586 587/**588 * mpc52xx_fec_hw_init589 * @dev: network device590 *591 * Setup various hardware setting, only needed once on start592 */593static void mpc52xx_fec_hw_init(struct net_device *dev)594{595 struct mpc52xx_fec_priv *priv = netdev_priv(dev);596 struct mpc52xx_fec __iomem *fec = priv->fec;597 int i;598 599 /* Whack a reset. We should wait for this. */600 out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);601 for (i = 0; i < FEC_RESET_DELAY; ++i) {602 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)603 break;604 udelay(1);605 }606 if (i == FEC_RESET_DELAY)607 dev_err(&dev->dev, "FEC Reset timeout!\n");608 609 /* set pause to 0x20 frames */610 out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);611 612 /* high service request will be deasserted when there's < 7 bytes in fifo613 * low service request will be deasserted when there's < 4*7 bytes in fifo614 */615 out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);616 out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);617 618 /* alarm when <= x bytes in FIFO */619 out_be32(&fec->rfifo_alarm, 0x0000030c);620 out_be32(&fec->tfifo_alarm, 0x00000100);621 622 /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */623 out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);624 625 /* enable crc generation */626 out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);627 out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */628 out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */629 630 /* set phy speed.631 * this can't be done in phy driver, since it needs to be called632 * before fec stuff (even on resume) */633 out_be32(&fec->mii_speed, priv->mdio_speed);634}635 636/**637 * mpc52xx_fec_start638 * @dev: network device639 *640 * This function is called to start or restart the FEC during a link641 * change. This happens on fifo errors or when switching between half642 * and full duplex.643 */644static void mpc52xx_fec_start(struct net_device *dev)645{646 struct mpc52xx_fec_priv *priv = netdev_priv(dev);647 struct mpc52xx_fec __iomem *fec = priv->fec;648 u32 rcntrl;649 u32 tcntrl;650 u32 tmp;651 652 /* clear sticky error bits */653 tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;654 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);655 out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);656 657 /* FIFOs will reset on mpc52xx_fec_enable */658 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);659 660 /* Set station address. */661 mpc52xx_fec_set_paddr(dev, dev->dev_addr);662 663 mpc52xx_fec_set_multicast_list(dev);664 665 /* set max frame len, enable flow control, select mii mode */666 rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */667 rcntrl |= FEC_RCNTRL_FCE;668 669 if (!priv->seven_wire_mode)670 rcntrl |= FEC_RCNTRL_MII_MODE;671 672 if (priv->duplex == DUPLEX_FULL)673 tcntrl = FEC_TCNTRL_FDEN; /* FD enable */674 else {675 rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */676 tcntrl = 0;677 }678 out_be32(&fec->r_cntrl, rcntrl);679 out_be32(&fec->x_cntrl, tcntrl);680 681 /* Clear any outstanding interrupt. */682 out_be32(&fec->ievent, 0xffffffff);683 684 /* Enable interrupts we wish to service. */685 out_be32(&fec->imask, FEC_IMASK_ENABLE);686 687 /* And last, enable the transmit and receive processing. */688 out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);689 out_be32(&fec->r_des_active, 0x01000000);690}691 692/**693 * mpc52xx_fec_stop694 * @dev: network device695 *696 * stop all activity on fec and empty dma buffers697 */698static void mpc52xx_fec_stop(struct net_device *dev, bool may_sleep)699{700 struct mpc52xx_fec_priv *priv = netdev_priv(dev);701 struct mpc52xx_fec __iomem *fec = priv->fec;702 unsigned long timeout;703 704 /* disable all interrupts */705 out_be32(&fec->imask, 0);706 707 /* Disable the rx task. */708 bcom_disable(priv->rx_dmatsk);709 710 /* Wait for tx queue to drain, but only if we're in process context */711 if (may_sleep) {712 timeout = jiffies + msecs_to_jiffies(2000);713 while (time_before(jiffies, timeout) &&714 !bcom_queue_empty(priv->tx_dmatsk))715 msleep(100);716 717 if (time_after_eq(jiffies, timeout))718 dev_err(&dev->dev, "queues didn't drain\n");719#if 1720 if (time_after_eq(jiffies, timeout)) {721 dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",722 priv->tx_dmatsk->index,723 priv->tx_dmatsk->outdex);724 dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",725 priv->rx_dmatsk->index,726 priv->rx_dmatsk->outdex);727 }728#endif729 }730 731 bcom_disable(priv->tx_dmatsk);732 733 /* Stop FEC */734 out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);735}736 737/* reset fec and bestcomm tasks */738static void mpc52xx_fec_reset(struct net_device *dev)739{740 struct mpc52xx_fec_priv *priv = netdev_priv(dev);741 struct mpc52xx_fec __iomem *fec = priv->fec;742 743 mpc52xx_fec_stop(dev, false);744 745 out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));746 out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);747 748 mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);749 750 mpc52xx_fec_hw_init(dev);751 752 bcom_fec_rx_reset(priv->rx_dmatsk);753 bcom_fec_tx_reset(priv->tx_dmatsk);754 755 mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);756 757 bcom_enable(priv->rx_dmatsk);758 bcom_enable(priv->tx_dmatsk);759 760 mpc52xx_fec_start(dev);761 762 netif_wake_queue(dev);763}764 765 766/* ethtool interface */767 768static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)769{770 struct mpc52xx_fec_priv *priv = netdev_priv(dev);771 return priv->msg_enable;772}773 774static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)775{776 struct mpc52xx_fec_priv *priv = netdev_priv(dev);777 priv->msg_enable = level;778}779 780static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {781 .get_link = ethtool_op_get_link,782 .get_msglevel = mpc52xx_fec_get_msglevel,783 .set_msglevel = mpc52xx_fec_set_msglevel,784 .get_ts_info = ethtool_op_get_ts_info,785 .get_link_ksettings = phy_ethtool_get_link_ksettings,786 .set_link_ksettings = phy_ethtool_set_link_ksettings,787};788 789 790static const struct net_device_ops mpc52xx_fec_netdev_ops = {791 .ndo_open = mpc52xx_fec_open,792 .ndo_stop = mpc52xx_fec_close,793 .ndo_start_xmit = mpc52xx_fec_start_xmit,794 .ndo_set_rx_mode = mpc52xx_fec_set_multicast_list,795 .ndo_set_mac_address = mpc52xx_fec_set_mac_address,796 .ndo_validate_addr = eth_validate_addr,797 .ndo_eth_ioctl = phy_do_ioctl,798 .ndo_tx_timeout = mpc52xx_fec_tx_timeout,799 .ndo_get_stats = mpc52xx_fec_get_stats,800#ifdef CONFIG_NET_POLL_CONTROLLER801 .ndo_poll_controller = mpc52xx_fec_poll_controller,802#endif803};804 805/* ======================================================================== */806/* OF Driver */807/* ======================================================================== */808 809static int mpc52xx_fec_probe(struct platform_device *op)810{811 int rv;812 struct net_device *ndev;813 struct mpc52xx_fec_priv *priv = NULL;814 struct resource mem;815 const u32 *prop;816 int prop_size;817 struct device_node *np = op->dev.of_node;818 819 phys_addr_t rx_fifo;820 phys_addr_t tx_fifo;821 822 /* Get the ether ndev & it's private zone */823 ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));824 if (!ndev)825 return -ENOMEM;826 827 priv = netdev_priv(ndev);828 priv->ndev = ndev;829 830 /* Reserve FEC control zone */831 rv = of_address_to_resource(np, 0, &mem);832 if (rv) {833 pr_err("Error while parsing device node resource\n");834 goto err_netdev;835 }836 if (resource_size(&mem) < sizeof(struct mpc52xx_fec)) {837 pr_err("invalid resource size (%lx < %x), check mpc52xx_devices.c\n",838 (unsigned long)resource_size(&mem),839 sizeof(struct mpc52xx_fec));840 rv = -EINVAL;841 goto err_netdev;842 }843 844 if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec),845 DRIVER_NAME)) {846 rv = -EBUSY;847 goto err_netdev;848 }849 850 /* Init ether ndev with what we have */851 ndev->netdev_ops = &mpc52xx_fec_netdev_ops;852 ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;853 ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;854 ndev->base_addr = mem.start;855 SET_NETDEV_DEV(ndev, &op->dev);856 857 spin_lock_init(&priv->lock);858 859 /* ioremap the zones */860 priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));861 862 if (!priv->fec) {863 rv = -ENOMEM;864 goto err_mem_region;865 }866 867 /* Bestcomm init */868 rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);869 tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);870 871 priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);872 priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);873 874 if (!priv->rx_dmatsk || !priv->tx_dmatsk) {875 pr_err("Can not init SDMA tasks\n");876 rv = -ENOMEM;877 goto err_rx_tx_dmatsk;878 }879 880 /* Get the IRQ we need one by one */881 /* Control */882 ndev->irq = irq_of_parse_and_map(np, 0);883 884 /* RX */885 priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);886 887 /* TX */888 priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);889 890 /*891 * MAC address init:892 *893 * First try to read MAC address from DT894 */895 rv = of_get_ethdev_address(np, ndev);896 if (rv) {897 struct mpc52xx_fec __iomem *fec = priv->fec;898 u8 addr[ETH_ALEN] __aligned(4);899 900 /*901 * If the MAC addresse is not provided via DT then read902 * it back from the controller regs903 */904 *(u32 *)(&addr[0]) = in_be32(&fec->paddr1);905 *(u16 *)(&addr[4]) = in_be32(&fec->paddr2) >> 16;906 eth_hw_addr_set(ndev, addr);907 }908 909 /*910 * Check if the MAC address is valid, if not get a random one911 */912 if (!is_valid_ether_addr(ndev->dev_addr)) {913 eth_hw_addr_random(ndev);914 dev_warn(&ndev->dev, "using random MAC address %pM\n",915 ndev->dev_addr);916 }917 918 priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);919 920 /*921 * Link mode configuration922 */923 924 /* Start with safe defaults for link connection */925 priv->speed = 100;926 priv->duplex = DUPLEX_HALF;927 priv->mdio_speed = ((mpc5xxx_get_bus_frequency(&op->dev) >> 20) / 5) << 1;928 929 /* The current speed preconfigures the speed of the MII link */930 prop = of_get_property(np, "current-speed", &prop_size);931 if (prop && (prop_size >= sizeof(u32) * 2)) {932 priv->speed = prop[0];933 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;934 }935 936 /* If there is a phy handle, then get the PHY node */937 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);938 939 /* the 7-wire property means don't use MII mode */940 if (of_property_read_bool(np, "fsl,7-wire-mode")) {941 priv->seven_wire_mode = 1;942 dev_info(&ndev->dev, "using 7-wire PHY mode\n");943 }944 945 /* Hardware init */946 mpc52xx_fec_hw_init(ndev);947 mpc52xx_fec_reset_stats(ndev);948 949 rv = register_netdev(ndev);950 if (rv < 0)951 goto err_node;952 953 /* We're done ! */954 platform_set_drvdata(op, ndev);955 netdev_info(ndev, "%pOF MAC %pM\n",956 op->dev.of_node, ndev->dev_addr);957 958 return 0;959 960err_node:961 of_node_put(priv->phy_node);962 irq_dispose_mapping(ndev->irq);963err_rx_tx_dmatsk:964 if (priv->rx_dmatsk)965 bcom_fec_rx_release(priv->rx_dmatsk);966 if (priv->tx_dmatsk)967 bcom_fec_tx_release(priv->tx_dmatsk);968 iounmap(priv->fec);969err_mem_region:970 release_mem_region(mem.start, sizeof(struct mpc52xx_fec));971err_netdev:972 free_netdev(ndev);973 974 return rv;975}976 977static void978mpc52xx_fec_remove(struct platform_device *op)979{980 struct net_device *ndev;981 struct mpc52xx_fec_priv *priv;982 983 ndev = platform_get_drvdata(op);984 priv = netdev_priv(ndev);985 986 unregister_netdev(ndev);987 988 of_node_put(priv->phy_node);989 priv->phy_node = NULL;990 991 irq_dispose_mapping(ndev->irq);992 993 bcom_fec_rx_release(priv->rx_dmatsk);994 bcom_fec_tx_release(priv->tx_dmatsk);995 996 iounmap(priv->fec);997 998 release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));999 1000 free_netdev(ndev);1001}1002 1003#ifdef CONFIG_PM1004static int mpc52xx_fec_of_suspend(struct platform_device *op, pm_message_t state)1005{1006 struct net_device *dev = platform_get_drvdata(op);1007 1008 if (netif_running(dev))1009 mpc52xx_fec_close(dev);1010 1011 return 0;1012}1013 1014static int mpc52xx_fec_of_resume(struct platform_device *op)1015{1016 struct net_device *dev = platform_get_drvdata(op);1017 1018 mpc52xx_fec_hw_init(dev);1019 mpc52xx_fec_reset_stats(dev);1020 1021 if (netif_running(dev))1022 mpc52xx_fec_open(dev);1023 1024 return 0;1025}1026#endif1027 1028static const struct of_device_id mpc52xx_fec_match[] = {1029 { .compatible = "fsl,mpc5200b-fec", },1030 { .compatible = "fsl,mpc5200-fec", },1031 { .compatible = "mpc5200-fec", },1032 { }1033};1034 1035MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);1036 1037static struct platform_driver mpc52xx_fec_driver = {1038 .driver = {1039 .name = DRIVER_NAME,1040 .of_match_table = mpc52xx_fec_match,1041 },1042 .probe = mpc52xx_fec_probe,1043 .remove_new = mpc52xx_fec_remove,1044#ifdef CONFIG_PM1045 .suspend = mpc52xx_fec_of_suspend,1046 .resume = mpc52xx_fec_of_resume,1047#endif1048};1049 1050 1051/* ======================================================================== */1052/* Module */1053/* ======================================================================== */1054 1055static struct platform_driver * const drivers[] = {1056#ifdef CONFIG_FEC_MPC52xx_MDIO1057 &mpc52xx_fec_mdio_driver,1058#endif1059 &mpc52xx_fec_driver,1060};1061 1062static int __init1063mpc52xx_fec_init(void)1064{1065 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));1066}1067 1068static void __exit1069mpc52xx_fec_exit(void)1070{1071 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));1072}1073 1074 1075module_init(mpc52xx_fec_init);1076module_exit(mpc52xx_fec_exit);1077 1078MODULE_LICENSE("GPL");1079MODULE_AUTHOR("Dale Farnsworth");1080MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");1081