SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/fec_mpc52xx.c

   1 /*
   2  * Driver for the MPC5200 Fast Ethernet Controller
   3  *
   4  * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
   5  * 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 License
  12  * version 2. This program is licensed "as is" without any warranty of any
  13  * kind, whether express or implied.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18
  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>
  30
  31 #include <linux/netdevice.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/skbuff.h>
  35
  36 #include <asm/io.h>
  37 #include <asm/delay.h>
  38 #include <asm/mpc52xx.h>
  39
  40 #include <sysdev/bestcomm/bestcomm.h>
  41 #include <sysdev/bestcomm/fec.h>
  42
  43 #include "fec_mpc52xx.h"
  44
  45 #define DRIVER_NAME "mpc52xx-fec"
  46
  47 /* Private driver data structure */
  48 struct mpc52xx_fec_priv {
  49         struct net_device *ndev;
  50         int duplex;
  51         int speed;
  52         int r_irq;
  53         int t_irq;
  54         struct mpc52xx_fec __iomem *fec;
  55         struct bcom_task *rx_dmatsk;
  56         struct bcom_task *tx_dmatsk;
  57         spinlock_t lock;
  58         int msg_enable;
  59
  60         /* MDIO link details */
  61         unsigned int mdio_speed;
  62         struct device_node *phy_node;
  63         struct phy_device *phydev;
  64         enum phy_state link;
  65         int seven_wire_mode;
  66 };
  67
  68
  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);
  75
  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");
  79
  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");
  85
  86 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
  87 {
  88         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
  89         unsigned long flags;
  90
  91         dev_warn(&dev->dev, "transmit timed out\n");
  92
  93         spin_lock_irqsave(&priv->lock, flags);
  94         mpc52xx_fec_reset(dev);
  95         dev->stats.tx_errors++;
  96         spin_unlock_irqrestore(&priv->lock, flags);
  97
  98         netif_wake_queue(dev);
  99 }
 100
 101 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
 102 {
 103         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 104         struct mpc52xx_fec __iomem *fec = priv->fec;
 105
 106         out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
 107         out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
 108 }
 109
 110 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
 111 {
 112         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 113         struct mpc52xx_fec __iomem *fec = priv->fec;
 114
 115         *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
 116         *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
 117 }
 118
 119 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
 120 {
 121         struct sockaddr *sock = addr;
 122
 123         memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
 124
 125         mpc52xx_fec_set_paddr(dev, sock->sa_data);
 126         return 0;
 127 }
 128
 129 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
 130 {
 131         while (!bcom_queue_empty(s)) {
 132                 struct bcom_fec_bd *bd;
 133                 struct sk_buff *skb;
 134
 135                 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
 136                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
 137                                  DMA_FROM_DEVICE);
 138                 kfree_skb(skb);
 139         }
 140 }
 141
 142 static void
 143 mpc52xx_fec_rx_submit(struct net_device *dev, struct sk_buff *rskb)
 144 {
 145         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 146         struct bcom_fec_bd *bd;
 147
 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);
 153 }
 154
 155 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
 156 {
 157         struct sk_buff *skb;
 158
 159         while (!bcom_queue_full(rxtsk)) {
 160                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 161                 if (!skb)
 162                         return -EAGAIN;
 163
 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);
 167         }
 168         return 0;
 169 }
 170
 171 /* based on generic_adjust_link from fs_enet-main.c */
 172 static void mpc52xx_fec_adjust_link(struct net_device *dev)
 173 {
 174         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 175         struct phy_device *phydev = priv->phydev;
 176         int new_state = 0;
 177
 178         if (phydev->link != PHY_DOWN) {
 179                 if (phydev->duplex != priv->duplex) {
 180                         struct mpc52xx_fec __iomem *fec = priv->fec;
 181                         u32 rcntrl;
 182                         u32 tcntrl;
 183
 184                         new_state = 1;
 185                         priv->duplex = phydev->duplex;
 186
 187                         rcntrl = in_be32(&fec->r_cntrl);
 188                         tcntrl = in_be32(&fec->x_cntrl);
 189
 190                         rcntrl &= ~FEC_RCNTRL_DRT;
 191                         tcntrl &= ~FEC_TCNTRL_FDEN;
 192                         if (phydev->duplex == DUPLEX_FULL)
 193                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
 194                         else
 195                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 196
 197                         out_be32(&fec->r_cntrl, rcntrl);
 198                         out_be32(&fec->x_cntrl, tcntrl);
 199                 }
 200
 201                 if (phydev->speed != priv->speed) {
 202                         new_state = 1;
 203                         priv->speed = phydev->speed;
 204                 }
 205
 206                 if (priv->link == PHY_DOWN) {
 207                         new_state = 1;
 208                         priv->link = phydev->link;
 209                 }
 210
 211         } else if (priv->link) {
 212                 new_state = 1;
 213                 priv->link = PHY_DOWN;
 214                 priv->speed = 0;
 215                 priv->duplex = -1;
 216         }
 217
 218         if (new_state && netif_msg_link(priv))
 219                 phy_print_status(phydev);
 220 }
 221
 222 static int mpc52xx_fec_open(struct net_device *dev)
 223 {
 224         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 225         int err = -EBUSY;
 226
 227         if (priv->phy_node) {
 228                 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
 229                                               mpc52xx_fec_adjust_link, 0, 0);
 230                 if (!priv->phydev) {
 231                         dev_err(&dev->dev, "of_phy_connect failed\n");
 232                         return -ENODEV;
 233                 }
 234                 phy_start(priv->phydev);
 235         }
 236
 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");
 240                 goto free_phy;
 241         }
 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");
 245                 goto free_ctrl_irq;
 246         }
 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");
 250                 goto free_2irqs;
 251         }
 252
 253         bcom_fec_rx_reset(priv->rx_dmatsk);
 254         bcom_fec_tx_reset(priv->tx_dmatsk);
 255
 256         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 257         if (err) {
 258                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
 259                 goto free_irqs;
 260         }
 261
 262         bcom_enable(priv->rx_dmatsk);
 263         bcom_enable(priv->tx_dmatsk);
 264
 265         mpc52xx_fec_start(dev);
 266
 267         netif_start_queue(dev);
 268
 269         return 0;
 270
 271  free_irqs:
 272         free_irq(priv->t_irq, dev);
 273  free_2irqs:
 274         free_irq(priv->r_irq, dev);
 275  free_ctrl_irq:
 276         free_irq(dev->irq, dev);
 277  free_phy:
 278         if (priv->phydev) {
 279                 phy_stop(priv->phydev);
 280                 phy_disconnect(priv->phydev);
 281                 priv->phydev = NULL;
 282         }
 283
 284         return err;
 285 }
 286
 287 static int mpc52xx_fec_close(struct net_device *dev)
 288 {
 289         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 290
 291         netif_stop_queue(dev);
 292
 293         mpc52xx_fec_stop(dev);
 294
 295         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 296
 297         free_irq(dev->irq, dev);
 298         free_irq(priv->r_irq, dev);
 299         free_irq(priv->t_irq, dev);
 300
 301         if (priv->phydev) {
 302                 /* power down phy */
 303                 phy_stop(priv->phydev);
 304                 phy_disconnect(priv->phydev);
 305                 priv->phydev = NULL;
 306         }
 307
 308         return 0;
 309 }
 310
 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.
 315  */
 316 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 317 {
 318         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 319         struct bcom_fec_bd *bd;
 320         unsigned long flags;
 321
 322         if (bcom_queue_full(priv->tx_dmatsk)) {
 323                 if (net_ratelimit())
 324                         dev_err(&dev->dev, "transmit queue overrun\n");
 325                 return NETDEV_TX_BUSY;
 326         }
 327
 328         spin_lock_irqsave(&priv->lock, flags);
 329         dev->trans_start = jiffies;
 330
 331         bd = (struct bcom_fec_bd *)
 332                 bcom_prepare_next_buffer(priv->tx_dmatsk);
 333
 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,
 336                                     DMA_TO_DEVICE);
 337
 338         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
 339         spin_unlock_irqrestore(&priv->lock, flags);
 340
 341         if (bcom_queue_full(priv->tx_dmatsk)) {
 342                 netif_stop_queue(dev);
 343         }
 344
 345         return NETDEV_TX_OK;
 346 }
 347
 348 #ifdef CONFIG_NET_POLL_CONTROLLER
 349 static void mpc52xx_fec_poll_controller(struct net_device *dev)
 350 {
 351         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 352
 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);
 359 }
 360 #endif
 361
 362
 363 /* This handles BestComm transmit task interrupts
 364  */
 365 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
 366 {
 367         struct net_device *dev = dev_id;
 368         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 369         unsigned long flags;
 370
 371         spin_lock_irqsave(&priv->lock, flags);
 372         while (bcom_buffer_done(priv->tx_dmatsk)) {
 373                 struct sk_buff *skb;
 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,
 378                                  DMA_TO_DEVICE);
 379
 380                 dev_kfree_skb_irq(skb);
 381         }
 382         spin_unlock_irqrestore(&priv->lock, flags);
 383
 384         netif_wake_queue(dev);
 385
 386         return IRQ_HANDLED;
 387 }
 388
 389 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
 390 {
 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;
 397         int length;
 398         unsigned long flags;
 399
 400         spin_lock_irqsave(&priv->lock, flags);
 401
 402         while (bcom_buffer_done(priv->rx_dmatsk)) {
 403
 404                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
 405                                             (struct bcom_bd **)&bd);
 406                 physaddr = bd->skb_pa;
 407
 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++;
 413                         continue;
 414                 }
 415
 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);
 419                 if (!skb) {
 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++;
 424                         continue;
 425                 }
 426
 427                 /* Enqueue the new sk_buff back on the hardware */
 428                 mpc52xx_fec_rx_submit(dev, skb);
 429
 430                 /* Process the received skb - Drop the spin lock while
 431                  * calling into the network stack */
 432                 spin_unlock_irqrestore(&priv->lock, flags);
 433
 434                 dma_unmap_single(dev->dev.parent, physaddr, rskb->len,
 435                                  DMA_FROM_DEVICE);
 436                 length = status & BCOM_FEC_RX_BD_LEN_MASK;
 437                 skb_put(rskb, length - 4);      /* length without CRC32 */
 438                 rskb->dev = dev;
 439                 rskb->protocol = eth_type_trans(rskb, dev);
 440                 netif_rx(rskb);
 441
 442                 spin_lock_irqsave(&priv->lock, flags);
 443         }
 444
 445         spin_unlock_irqrestore(&priv->lock, flags);
 446
 447         return IRQ_HANDLED;
 448 }
 449
 450 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
 451 {
 452         struct net_device *dev = dev_id;
 453         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 454         struct mpc52xx_fec __iomem *fec = priv->fec;
 455         u32 ievent;
 456         unsigned long flags;
 457
 458         ievent = in_be32(&fec->ievent);
 459
 460         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
 461         if (!ievent)
 462                 return IRQ_NONE;
 463
 464         out_be32(&fec->ievent, ievent);         /* clear pending events */
 465
 466         /* on fifo error, soft-reset fec */
 467         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
 468
 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");
 473
 474                 spin_lock_irqsave(&priv->lock, flags);
 475                 mpc52xx_fec_reset(dev);
 476                 spin_unlock_irqrestore(&priv->lock, flags);
 477
 478                 return IRQ_HANDLED;
 479         }
 480
 481         if (ievent & ~FEC_IEVENT_TFINT)
 482                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
 483
 484         return IRQ_HANDLED;
 485 }
 486
 487 /*
 488  * Get the current statistics.
 489  * This may be called with the card open or closed.
 490  */
 491 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
 492 {
 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;
 496
 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);
 504
 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);
 512
 513         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
 514         stats->collisions = in_be32(&fec->rmon_t_col);
 515
 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);
 526
 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);
 533
 534         return stats;
 535 }
 536
 537 /*
 538  * Read MIB counters in order to reset them,
 539  * then zero all the stats fields in memory
 540  */
 541 static void mpc52xx_fec_reset_stats(struct net_device *dev)
 542 {
 543         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 544         struct mpc52xx_fec __iomem *fec = priv->fec;
 545
 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);
 551
 552         memset(&dev->stats, 0, sizeof(dev->stats));
 553 }
 554
 555 /*
 556  * Set or clear the multicast filter for this adaptor.
 557  */
 558 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
 559 {
 560         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 561         struct mpc52xx_fec __iomem *fec = priv->fec;
 562         u32 rx_control;
 563
 564         rx_control = in_be32(&fec->r_cntrl);
 565
 566         if (dev->flags & IFF_PROMISC) {
 567                 rx_control |= FEC_RCNTRL_PROM;
 568                 out_be32(&fec->r_cntrl, rx_control);
 569         } else {
 570                 rx_control &= ~FEC_RCNTRL_PROM;
 571                 out_be32(&fec->r_cntrl, rx_control);
 572
 573                 if (dev->flags & IFF_ALLMULTI) {
 574                         out_be32(&fec->gaddr1, 0xffffffff);
 575                         out_be32(&fec->gaddr2, 0xffffffff);
 576                 } else {
 577                         u32 crc;
 578                         int i;
 579                         struct dev_mc_list *dmi;
 580                         u32 gaddr1 = 0x00000000;
 581                         u32 gaddr2 = 0x00000000;
 582
 583                         dmi = dev->mc_list;
 584                         for (i=0; i<dev->mc_count; i++) {
 585                                 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
 586                                 if (crc >= 32)
 587                                         gaddr1 |= 1 << (crc-32);
 588                                 else
 589                                         gaddr2 |= 1 << crc;
 590                                 dmi = dmi->next;
 591                         }
 592                         out_be32(&fec->gaddr1, gaddr1);
 593                         out_be32(&fec->gaddr2, gaddr2);
 594                 }
 595         }
 596 }
 597
 598 /**
 599  * mpc52xx_fec_hw_init
 600  * @dev: network device
 601  *
 602  * Setup various hardware setting, only needed once on start
 603  */
 604 static void mpc52xx_fec_hw_init(struct net_device *dev)
 605 {
 606         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 607         struct mpc52xx_fec __iomem *fec = priv->fec;
 608         int i;
 609
 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)
 614                         break;
 615                 udelay(1);
 616         }
 617         if (i == FEC_RESET_DELAY)
 618                 dev_err(&dev->dev, "FEC Reset timeout!\n");
 619
 620         /* set pause to 0x20 frames */
 621         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
 622
 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
 625          */
 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);
 628
 629         /* alarm when <= x bytes in FIFO */
 630         out_be32(&fec->rfifo_alarm, 0x0000030c);
 631         out_be32(&fec->tfifo_alarm, 0x00000100);
 632
 633         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
 634         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
 635
 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 */
 640
 641         /* set phy speed.
 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);
 645 }
 646
 647 /**
 648  * mpc52xx_fec_start
 649  * @dev: network device
 650  *
 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
 653  * and full duplex.
 654  */
 655 static void mpc52xx_fec_start(struct net_device *dev)
 656 {
 657         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 658         struct mpc52xx_fec __iomem *fec = priv->fec;
 659         u32 rcntrl;
 660         u32 tcntrl;
 661         u32 tmp;
 662
 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);
 667
 668         /* FIFOs will reset on mpc52xx_fec_enable */
 669         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
 670
 671         /* Set station address. */
 672         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
 673
 674         mpc52xx_fec_set_multicast_list(dev);
 675
 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;
 679
 680         if (!priv->seven_wire_mode)
 681                 rcntrl |= FEC_RCNTRL_MII_MODE;
 682
 683         if (priv->duplex == DUPLEX_FULL)
 684                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
 685         else {
 686                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 687                 tcntrl = 0;
 688         }
 689         out_be32(&fec->r_cntrl, rcntrl);
 690         out_be32(&fec->x_cntrl, tcntrl);
 691
 692         /* Clear any outstanding interrupt. */
 693         out_be32(&fec->ievent, 0xffffffff);
 694
 695         /* Enable interrupts we wish to service. */
 696         out_be32(&fec->imask, FEC_IMASK_ENABLE);
 697
 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);
 701 }
 702
 703 /**
 704  * mpc52xx_fec_stop
 705  * @dev: network device
 706  *
 707  * stop all activity on fec and empty dma buffers
 708  */
 709 static void mpc52xx_fec_stop(struct net_device *dev)
 710 {
 711         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 712         struct mpc52xx_fec __iomem *fec = priv->fec;
 713         unsigned long timeout;
 714
 715         /* disable all interrupts */
 716         out_be32(&fec->imask, 0);
 717
 718         /* Disable the rx task. */
 719         bcom_disable(priv->rx_dmatsk);
 720
 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))
 726                         msleep(100);
 727
 728                 if (time_after_eq(jiffies, timeout))
 729                         dev_err(&dev->dev, "queues didn't drain\n");
 730 #if 1
 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);
 738                 }
 739 #endif
 740         }
 741
 742         bcom_disable(priv->tx_dmatsk);
 743
 744         /* Stop FEC */
 745         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
 746 }
 747
 748 /* reset fec and bestcomm tasks */
 749 static void mpc52xx_fec_reset(struct net_device *dev)
 750 {
 751         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 752         struct mpc52xx_fec __iomem *fec = priv->fec;
 753
 754         mpc52xx_fec_stop(dev);
 755
 756         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
 757         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
 758
 759         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 760
 761         mpc52xx_fec_hw_init(dev);
 762
 763         bcom_fec_rx_reset(priv->rx_dmatsk);
 764         bcom_fec_tx_reset(priv->tx_dmatsk);
 765
 766         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 767
 768         bcom_enable(priv->rx_dmatsk);
 769         bcom_enable(priv->tx_dmatsk);
 770
 771         mpc52xx_fec_start(dev);
 772
 773         netif_wake_queue(dev);
 774 }
 775
 776
 777 /* ethtool interface */
 778 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
 779                 struct ethtool_drvinfo *info)
 780 {
 781         strcpy(info->driver, DRIVER_NAME);
 782 }
 783
 784 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 785 {
 786         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 787
 788         if (!priv->phydev)
 789                 return -ENODEV;
 790
 791         return phy_ethtool_gset(priv->phydev, cmd);
 792 }
 793
 794 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 795 {
 796         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 797
 798         if (!priv->phydev)
 799                 return -ENODEV;
 800
 801         return phy_ethtool_sset(priv->phydev, cmd);
 802 }
 803
 804 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
 805 {
 806         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 807         return priv->msg_enable;
 808 }
 809
 810 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
 811 {
 812         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 813         priv->msg_enable = level;
 814 }
 815
 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,
 823 };
 824
 825
 826 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 827 {
 828         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 829
 830         if (!priv->phydev)
 831                 return -ENOTSUPP;
 832
 833         return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
 834 }
 835
 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,
 849 #endif
 850 };
 851
 852 /* ======================================================================== */
 853 /* OF Driver                                                                */
 854 /* ======================================================================== */
 855
 856 static int __devinit
 857 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
 858 {
 859         int rv;
 860         struct net_device *ndev;
 861         struct mpc52xx_fec_priv *priv = NULL;
 862         struct resource mem;
 863         const u32 *prop;
 864         int prop_size;
 865
 866         phys_addr_t rx_fifo;
 867         phys_addr_t tx_fifo;
 868
 869         /* Get the ether ndev & it's private zone */
 870         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
 871         if (!ndev)
 872                 return -ENOMEM;
 873
 874         priv = netdev_priv(ndev);
 875         priv->ndev = ndev;
 876
 877         /* Reserve FEC control zone */
 878         rv = of_address_to_resource(op->node, 0, &mem);
 879         if (rv) {
 880                 printk(KERN_ERR DRIVER_NAME ": "
 881                                 "Error while parsing device node resource\n" );
 882                 return rv;
 883         }
 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));
 888                 return -EINVAL;
 889         }
 890
 891         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
 892                 return -EBUSY;
 893
 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);
 900
 901         spin_lock_init(&priv->lock);
 902
 903         /* ioremap the zones */
 904         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
 905
 906         if (!priv->fec) {
 907                 rv = -ENOMEM;
 908                 goto probe_error;
 909         }
 910
 911         /* Bestcomm init */
 912         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
 913         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
 914
 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);
 917
 918         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
 919                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
 920                 rv = -ENOMEM;
 921                 goto probe_error;
 922         }
 923
 924         /* Get the IRQ we need one by one */
 925                 /* Control */
 926         ndev->irq = irq_of_parse_and_map(op->node, 0);
 927
 928                 /* RX */
 929         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
 930
 931                 /* TX */
 932         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
 933
 934         /* MAC address init */
 935         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
 936                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
 937         else
 938                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
 939
 940         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
 941
 942         /*
 943          * Link mode configuration
 944          */
 945
 946         /* Start with safe defaults for link connection */
 947         priv->speed = 100;
 948         priv->duplex = DUPLEX_HALF;
 949         priv->mdio_speed = ((mpc5xxx_get_bus_frequency(op->node) >> 20) / 5) << 1;
 950
 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;
 956         }
 957
 958         /* If there is a phy handle, then get the PHY node */
 959         priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
 960
 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");
 965         }
 966
 967         /* Hardware init */
 968         mpc52xx_fec_hw_init(ndev);
 969         mpc52xx_fec_reset_stats(ndev);
 970
 971         rv = register_netdev(ndev);
 972         if (rv < 0)
 973                 goto probe_error;
 974
 975         /* We're done ! */
 976         dev_set_drvdata(&op->dev, ndev);
 977
 978         return 0;
 979
 980
 981         /* Error handling - free everything that might be allocated */
 982 probe_error:
 983
 984         if (priv->phy_node)
 985                 of_node_put(priv->phy_node);
 986         priv->phy_node = NULL;
 987
 988         irq_dispose_mapping(ndev->irq);
 989
 990         if (priv->rx_dmatsk)
 991                 bcom_fec_rx_release(priv->rx_dmatsk);
 992         if (priv->tx_dmatsk)
 993                 bcom_fec_tx_release(priv->tx_dmatsk);
 994
 995         if (priv->fec)
 996                 iounmap(priv->fec);
 997
 998         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
 999
1000         free_netdev(ndev);
1001
1002         return rv;
1003 }
1004
1005 static int
1006 mpc52xx_fec_remove(struct of_device *op)
1007 {
1008         struct net_device *ndev;
1009         struct mpc52xx_fec_priv *priv;
1010
1011         ndev = dev_get_drvdata(&op->dev);
1012         priv = netdev_priv(ndev);
1013
1014         unregister_netdev(ndev);
1015
1016         if (priv->phy_node)
1017                 of_node_put(priv->phy_node);
1018         priv->phy_node = NULL;
1019
1020         irq_dispose_mapping(ndev->irq);
1021
1022         bcom_fec_rx_release(priv->rx_dmatsk);
1023         bcom_fec_tx_release(priv->tx_dmatsk);
1024
1025         iounmap(priv->fec);
1026
1027         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1028
1029         free_netdev(ndev);
1030
1031         dev_set_drvdata(&op->dev, NULL);
1032         return 0;
1033 }
1034
1035 #ifdef CONFIG_PM
1036 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1037 {
1038         struct net_device *dev = dev_get_drvdata(&op->dev);
1039
1040         if (netif_running(dev))
1041                 mpc52xx_fec_close(dev);
1042
1043         return 0;
1044 }
1045
1046 static int mpc52xx_fec_of_resume(struct of_device *op)
1047 {
1048         struct net_device *dev = dev_get_drvdata(&op->dev);
1049
1050         mpc52xx_fec_hw_init(dev);
1051         mpc52xx_fec_reset_stats(dev);
1052
1053         if (netif_running(dev))
1054                 mpc52xx_fec_open(dev);
1055
1056         return 0;
1057 }
1058 #endif
1059
1060 static struct of_device_id mpc52xx_fec_match[] = {
1061         { .compatible = "fsl,mpc5200b-fec", },
1062         { .compatible = "fsl,mpc5200-fec", },
1063         { .compatible = "mpc5200-fec", },
1064         { }
1065 };
1066
1067 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1068
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,
1075 #ifdef CONFIG_PM
1076         .suspend        = mpc52xx_fec_of_suspend,
1077         .resume         = mpc52xx_fec_of_resume,
1078 #endif
1079 };
1080
1081
1082 /* ======================================================================== */
1083 /* Module                                                                   */
1084 /* ======================================================================== */
1085
1086 static int __init
1087 mpc52xx_fec_init(void)
1088 {
1089 #ifdef CONFIG_FEC_MPC52xx_MDIO
1090         int ret;
1091         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1092         if (ret) {
1093                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1094                 return ret;
1095         }
1096 #endif
1097         return of_register_platform_driver(&mpc52xx_fec_driver);
1098 }
1099
1100 static void __exit
1101 mpc52xx_fec_exit(void)
1102 {
1103         of_unregister_platform_driver(&mpc52xx_fec_driver);
1104 #ifdef CONFIG_FEC_MPC52xx_MDIO
1105         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1106 #endif
1107 }
1108
1109
1110 module_init(mpc52xx_fec_init);
1111 module_exit(mpc52xx_fec_exit);
1112
1113 MODULE_LICENSE("GPL");
1114 MODULE_AUTHOR("Dale Farnsworth");
1115 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");