git.oblomov.eu Git - 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         dev_warn(&dev->dev, "transmit timed out\n");
  89
  90         mpc52xx_fec_reset(dev);
  91
  92         dev->stats.tx_errors++;
  93
  94         netif_wake_queue(dev);
  95 }
  96
  97 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
  98 {
  99         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 100         struct mpc52xx_fec __iomem *fec = priv->fec;
 101
 102         out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
 103         out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
 104 }
 105
 106 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
 107 {
 108         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 109         struct mpc52xx_fec __iomem *fec = priv->fec;
 110
 111         *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
 112         *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
 113 }
 114
 115 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
 116 {
 117         struct sockaddr *sock = addr;
 118
 119         memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
 120
 121         mpc52xx_fec_set_paddr(dev, sock->sa_data);
 122         return 0;
 123 }
 124
 125 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
 126 {
 127         while (!bcom_queue_empty(s)) {
 128                 struct bcom_fec_bd *bd;
 129                 struct sk_buff *skb;
 130
 131                 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
 132                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
 133                                  DMA_FROM_DEVICE);
 134                 kfree_skb(skb);
 135         }
 136 }
 137
 138 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
 139 {
 140         while (!bcom_queue_full(rxtsk)) {
 141                 struct sk_buff *skb;
 142                 struct bcom_fec_bd *bd;
 143
 144                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 145                 if (skb == NULL)
 146                         return -EAGAIN;
 147
 148                 /* zero out the initial receive buffers to aid debugging */
 149                 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
 150
 151                 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
 152
 153                 bd->status = FEC_RX_BUFFER_SIZE;
 154                 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
 155                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 156
 157                 bcom_submit_next_buffer(rxtsk, skb);
 158         }
 159
 160         return 0;
 161 }
 162
 163 /* based on generic_adjust_link from fs_enet-main.c */
 164 static void mpc52xx_fec_adjust_link(struct net_device *dev)
 165 {
 166         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 167         struct phy_device *phydev = priv->phydev;
 168         int new_state = 0;
 169
 170         if (phydev->link != PHY_DOWN) {
 171                 if (phydev->duplex != priv->duplex) {
 172                         struct mpc52xx_fec __iomem *fec = priv->fec;
 173                         u32 rcntrl;
 174                         u32 tcntrl;
 175
 176                         new_state = 1;
 177                         priv->duplex = phydev->duplex;
 178
 179                         rcntrl = in_be32(&fec->r_cntrl);
 180                         tcntrl = in_be32(&fec->x_cntrl);
 181
 182                         rcntrl &= ~FEC_RCNTRL_DRT;
 183                         tcntrl &= ~FEC_TCNTRL_FDEN;
 184                         if (phydev->duplex == DUPLEX_FULL)
 185                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
 186                         else
 187                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 188
 189                         out_be32(&fec->r_cntrl, rcntrl);
 190                         out_be32(&fec->x_cntrl, tcntrl);
 191                 }
 192
 193                 if (phydev->speed != priv->speed) {
 194                         new_state = 1;
 195                         priv->speed = phydev->speed;
 196                 }
 197
 198                 if (priv->link == PHY_DOWN) {
 199                         new_state = 1;
 200                         priv->link = phydev->link;
 201                 }
 202
 203         } else if (priv->link) {
 204                 new_state = 1;
 205                 priv->link = PHY_DOWN;
 206                 priv->speed = 0;
 207                 priv->duplex = -1;
 208         }
 209
 210         if (new_state && netif_msg_link(priv))
 211                 phy_print_status(phydev);
 212 }
 213
 214 static int mpc52xx_fec_open(struct net_device *dev)
 215 {
 216         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 217         int err = -EBUSY;
 218
 219         if (priv->phy_node) {
 220                 priv->phydev = of_phy_connect(priv->ndev, priv->phy_node,
 221                                               mpc52xx_fec_adjust_link, 0, 0);
 222                 if (!priv->phydev) {
 223                         dev_err(&dev->dev, "of_phy_connect failed\n");
 224                         return -ENODEV;
 225                 }
 226                 phy_start(priv->phydev);
 227         }
 228
 229         if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
 230                         DRIVER_NAME "_ctrl", dev)) {
 231                 dev_err(&dev->dev, "ctrl interrupt request failed\n");
 232                 goto free_phy;
 233         }
 234         if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
 235                         DRIVER_NAME "_rx", dev)) {
 236                 dev_err(&dev->dev, "rx interrupt request failed\n");
 237                 goto free_ctrl_irq;
 238         }
 239         if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
 240                         DRIVER_NAME "_tx", dev)) {
 241                 dev_err(&dev->dev, "tx interrupt request failed\n");
 242                 goto free_2irqs;
 243         }
 244
 245         bcom_fec_rx_reset(priv->rx_dmatsk);
 246         bcom_fec_tx_reset(priv->tx_dmatsk);
 247
 248         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 249         if (err) {
 250                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
 251                 goto free_irqs;
 252         }
 253
 254         bcom_enable(priv->rx_dmatsk);
 255         bcom_enable(priv->tx_dmatsk);
 256
 257         mpc52xx_fec_start(dev);
 258
 259         netif_start_queue(dev);
 260
 261         return 0;
 262
 263  free_irqs:
 264         free_irq(priv->t_irq, dev);
 265  free_2irqs:
 266         free_irq(priv->r_irq, dev);
 267  free_ctrl_irq:
 268         free_irq(dev->irq, dev);
 269  free_phy:
 270         if (priv->phydev) {
 271                 phy_stop(priv->phydev);
 272                 phy_disconnect(priv->phydev);
 273                 priv->phydev = NULL;
 274         }
 275
 276         return err;
 277 }
 278
 279 static int mpc52xx_fec_close(struct net_device *dev)
 280 {
 281         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 282
 283         netif_stop_queue(dev);
 284
 285         mpc52xx_fec_stop(dev);
 286
 287         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 288
 289         free_irq(dev->irq, dev);
 290         free_irq(priv->r_irq, dev);
 291         free_irq(priv->t_irq, dev);
 292
 293         if (priv->phydev) {
 294                 /* power down phy */
 295                 phy_stop(priv->phydev);
 296                 phy_disconnect(priv->phydev);
 297                 priv->phydev = NULL;
 298         }
 299
 300         return 0;
 301 }
 302
 303 /* This will only be invoked if your driver is _not_ in XOFF state.
 304  * What this means is that you need not check it, and that this
 305  * invariant will hold if you make sure that the netif_*_queue()
 306  * calls are done at the proper times.
 307  */
 308 static int mpc52xx_fec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 309 {
 310         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 311         struct bcom_fec_bd *bd;
 312
 313         if (bcom_queue_full(priv->tx_dmatsk)) {
 314                 if (net_ratelimit())
 315                         dev_err(&dev->dev, "transmit queue overrun\n");
 316                 return NETDEV_TX_BUSY;
 317         }
 318
 319         spin_lock_irq(&priv->lock);
 320         dev->trans_start = jiffies;
 321
 322         bd = (struct bcom_fec_bd *)
 323                 bcom_prepare_next_buffer(priv->tx_dmatsk);
 324
 325         bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
 326         bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
 327                                     DMA_TO_DEVICE);
 328
 329         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
 330
 331         if (bcom_queue_full(priv->tx_dmatsk)) {
 332                 netif_stop_queue(dev);
 333         }
 334
 335         spin_unlock_irq(&priv->lock);
 336
 337         return NETDEV_TX_OK;
 338 }
 339
 340 #ifdef CONFIG_NET_POLL_CONTROLLER
 341 static void mpc52xx_fec_poll_controller(struct net_device *dev)
 342 {
 343         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 344
 345         disable_irq(priv->t_irq);
 346         mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
 347         enable_irq(priv->t_irq);
 348         disable_irq(priv->r_irq);
 349         mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
 350         enable_irq(priv->r_irq);
 351 }
 352 #endif
 353
 354
 355 /* This handles BestComm transmit task interrupts
 356  */
 357 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
 358 {
 359         struct net_device *dev = dev_id;
 360         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 361
 362         spin_lock(&priv->lock);
 363
 364         while (bcom_buffer_done(priv->tx_dmatsk)) {
 365                 struct sk_buff *skb;
 366                 struct bcom_fec_bd *bd;
 367                 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
 368                                 (struct bcom_bd **)&bd);
 369                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
 370                                  DMA_TO_DEVICE);
 371
 372                 dev_kfree_skb_irq(skb);
 373         }
 374
 375         netif_wake_queue(dev);
 376
 377         spin_unlock(&priv->lock);
 378
 379         return IRQ_HANDLED;
 380 }
 381
 382 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
 383 {
 384         struct net_device *dev = dev_id;
 385         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 386
 387         while (bcom_buffer_done(priv->rx_dmatsk)) {
 388                 struct sk_buff *skb;
 389                 struct sk_buff *rskb;
 390                 struct bcom_fec_bd *bd;
 391                 u32 status;
 392
 393                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
 394                                 (struct bcom_bd **)&bd);
 395                 dma_unmap_single(dev->dev.parent, bd->skb_pa, rskb->len,
 396                                  DMA_FROM_DEVICE);
 397
 398                 /* Test for errors in received frame */
 399                 if (status & BCOM_FEC_RX_BD_ERRORS) {
 400                         /* Drop packet and reuse the buffer */
 401                         bd = (struct bcom_fec_bd *)
 402                                 bcom_prepare_next_buffer(priv->rx_dmatsk);
 403
 404                         bd->status = FEC_RX_BUFFER_SIZE;
 405                         bd->skb_pa = dma_map_single(dev->dev.parent,
 406                                         rskb->data,
 407                                         FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 408
 409                         bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
 410
 411                         dev->stats.rx_dropped++;
 412
 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                         /* Process the received skb */
 421                         int length = status & BCOM_FEC_RX_BD_LEN_MASK;
 422
 423                         skb_put(rskb, length - 4);      /* length without CRC32 */
 424
 425                         rskb->dev = dev;
 426                         rskb->protocol = eth_type_trans(rskb, dev);
 427
 428                         netif_rx(rskb);
 429                 } else {
 430                         /* Can't get a new one : reuse the same & drop pkt */
 431                         dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
 432                         dev->stats.rx_dropped++;
 433
 434                         skb = rskb;
 435                 }
 436
 437                 bd = (struct bcom_fec_bd *)
 438                         bcom_prepare_next_buffer(priv->rx_dmatsk);
 439
 440                 bd->status = FEC_RX_BUFFER_SIZE;
 441                 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
 442                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 443
 444                 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
 445         }
 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
 457         ievent = in_be32(&fec->ievent);
 458
 459         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
 460         if (!ievent)
 461                 return IRQ_NONE;
 462
 463         out_be32(&fec->ievent, ievent);         /* clear pending events */
 464
 465         /* on fifo error, soft-reset fec */
 466         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
 467
 468                 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
 469                         dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
 470                 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
 471                         dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
 472
 473                 mpc52xx_fec_reset(dev);
 474
 475                 netif_wake_queue(dev);
 476                 return IRQ_HANDLED;
 477         }
 478
 479         if (ievent & ~FEC_IEVENT_TFINT)
 480                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
 481
 482         return IRQ_HANDLED;
 483 }
 484
 485 /*
 486  * Get the current statistics.
 487  * This may be called with the card open or closed.
 488  */
 489 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
 490 {
 491         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 492         struct net_device_stats *stats = &dev->stats;
 493         struct mpc52xx_fec __iomem *fec = priv->fec;
 494
 495         stats->rx_bytes = in_be32(&fec->rmon_r_octets);
 496         stats->rx_packets = in_be32(&fec->rmon_r_packets);
 497         stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
 498                 in_be32(&fec->rmon_r_undersize) +
 499                 in_be32(&fec->rmon_r_oversize) +
 500                 in_be32(&fec->rmon_r_frag) +
 501                 in_be32(&fec->rmon_r_jab);
 502
 503         stats->tx_bytes = in_be32(&fec->rmon_t_octets);
 504         stats->tx_packets = in_be32(&fec->rmon_t_packets);
 505         stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
 506                 in_be32(&fec->rmon_t_undersize) +
 507                 in_be32(&fec->rmon_t_oversize) +
 508                 in_be32(&fec->rmon_t_frag) +
 509                 in_be32(&fec->rmon_t_jab);
 510
 511         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
 512         stats->collisions = in_be32(&fec->rmon_t_col);
 513
 514         /* detailed rx_errors: */
 515         stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
 516                                         + in_be32(&fec->rmon_r_oversize)
 517                                         + in_be32(&fec->rmon_r_frag)
 518                                         + in_be32(&fec->rmon_r_jab);
 519         stats->rx_over_errors = in_be32(&fec->r_macerr);
 520         stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
 521         stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
 522         stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
 523         stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
 524
 525         /* detailed tx_errors: */
 526         stats->tx_aborted_errors = 0;
 527         stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
 528         stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
 529         stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
 530         stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
 531
 532         return stats;
 533 }
 534
 535 /*
 536  * Read MIB counters in order to reset them,
 537  * then zero all the stats fields in memory
 538  */
 539 static void mpc52xx_fec_reset_stats(struct net_device *dev)
 540 {
 541         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 542         struct mpc52xx_fec __iomem *fec = priv->fec;
 543
 544         out_be32(&fec->mib_control, FEC_MIB_DISABLE);
 545         memset_io(&fec->rmon_t_drop, 0,
 546                    offsetof(struct mpc52xx_fec, reserved10) -
 547                    offsetof(struct mpc52xx_fec, rmon_t_drop));
 548         out_be32(&fec->mib_control, 0);
 549
 550         memset(&dev->stats, 0, sizeof(dev->stats));
 551 }
 552
 553 /*
 554  * Set or clear the multicast filter for this adaptor.
 555  */
 556 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
 557 {
 558         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 559         struct mpc52xx_fec __iomem *fec = priv->fec;
 560         u32 rx_control;
 561
 562         rx_control = in_be32(&fec->r_cntrl);
 563
 564         if (dev->flags & IFF_PROMISC) {
 565                 rx_control |= FEC_RCNTRL_PROM;
 566                 out_be32(&fec->r_cntrl, rx_control);
 567         } else {
 568                 rx_control &= ~FEC_RCNTRL_PROM;
 569                 out_be32(&fec->r_cntrl, rx_control);
 570
 571                 if (dev->flags & IFF_ALLMULTI) {
 572                         out_be32(&fec->gaddr1, 0xffffffff);
 573                         out_be32(&fec->gaddr2, 0xffffffff);
 574                 } else {
 575                         u32 crc;
 576                         int i;
 577                         struct dev_mc_list *dmi;
 578                         u32 gaddr1 = 0x00000000;
 579                         u32 gaddr2 = 0x00000000;
 580
 581                         dmi = dev->mc_list;
 582                         for (i=0; i<dev->mc_count; i++) {
 583                                 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
 584                                 if (crc >= 32)
 585                                         gaddr1 |= 1 << (crc-32);
 586                                 else
 587                                         gaddr2 |= 1 << crc;
 588                                 dmi = dmi->next;
 589                         }
 590                         out_be32(&fec->gaddr1, gaddr1);
 591                         out_be32(&fec->gaddr2, gaddr2);
 592                 }
 593         }
 594 }
 595
 596 /**
 597  * mpc52xx_fec_hw_init
 598  * @dev: network device
 599  *
 600  * Setup various hardware setting, only needed once on start
 601  */
 602 static void mpc52xx_fec_hw_init(struct net_device *dev)
 603 {
 604         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 605         struct mpc52xx_fec __iomem *fec = priv->fec;
 606         int i;
 607
 608         /* Whack a reset.  We should wait for this. */
 609         out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
 610         for (i = 0; i < FEC_RESET_DELAY; ++i) {
 611                 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
 612                         break;
 613                 udelay(1);
 614         }
 615         if (i == FEC_RESET_DELAY)
 616                 dev_err(&dev->dev, "FEC Reset timeout!\n");
 617
 618         /* set pause to 0x20 frames */
 619         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
 620
 621         /* high service request will be deasserted when there's < 7 bytes in fifo
 622          * low service request will be deasserted when there's < 4*7 bytes in fifo
 623          */
 624         out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 625         out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 626
 627         /* alarm when <= x bytes in FIFO */
 628         out_be32(&fec->rfifo_alarm, 0x0000030c);
 629         out_be32(&fec->tfifo_alarm, 0x00000100);
 630
 631         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
 632         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
 633
 634         /* enable crc generation */
 635         out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
 636         out_be32(&fec->iaddr1, 0x00000000);     /* No individual filter */
 637         out_be32(&fec->iaddr2, 0x00000000);     /* No individual filter */
 638
 639         /* set phy speed.
 640          * this can't be done in phy driver, since it needs to be called
 641          * before fec stuff (even on resume) */
 642         out_be32(&fec->mii_speed, priv->mdio_speed);
 643 }
 644
 645 /**
 646  * mpc52xx_fec_start
 647  * @dev: network device
 648  *
 649  * This function is called to start or restart the FEC during a link
 650  * change.  This happens on fifo errors or when switching between half
 651  * and full duplex.
 652  */
 653 static void mpc52xx_fec_start(struct net_device *dev)
 654 {
 655         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 656         struct mpc52xx_fec __iomem *fec = priv->fec;
 657         u32 rcntrl;
 658         u32 tcntrl;
 659         u32 tmp;
 660
 661         /* clear sticky error bits */
 662         tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
 663         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
 664         out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
 665
 666         /* FIFOs will reset on mpc52xx_fec_enable */
 667         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
 668
 669         /* Set station address. */
 670         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
 671
 672         mpc52xx_fec_set_multicast_list(dev);
 673
 674         /* set max frame len, enable flow control, select mii mode */
 675         rcntrl = FEC_RX_BUFFER_SIZE << 16;      /* max frame length */
 676         rcntrl |= FEC_RCNTRL_FCE;
 677
 678         if (!priv->seven_wire_mode)
 679                 rcntrl |= FEC_RCNTRL_MII_MODE;
 680
 681         if (priv->duplex == DUPLEX_FULL)
 682                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
 683         else {
 684                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 685                 tcntrl = 0;
 686         }
 687         out_be32(&fec->r_cntrl, rcntrl);
 688         out_be32(&fec->x_cntrl, tcntrl);
 689
 690         /* Clear any outstanding interrupt. */
 691         out_be32(&fec->ievent, 0xffffffff);
 692
 693         /* Enable interrupts we wish to service. */
 694         out_be32(&fec->imask, FEC_IMASK_ENABLE);
 695
 696         /* And last, enable the transmit and receive processing. */
 697         out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
 698         out_be32(&fec->r_des_active, 0x01000000);
 699 }
 700
 701 /**
 702  * mpc52xx_fec_stop
 703  * @dev: network device
 704  *
 705  * stop all activity on fec and empty dma buffers
 706  */
 707 static void mpc52xx_fec_stop(struct net_device *dev)
 708 {
 709         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 710         struct mpc52xx_fec __iomem *fec = priv->fec;
 711         unsigned long timeout;
 712
 713         /* disable all interrupts */
 714         out_be32(&fec->imask, 0);
 715
 716         /* Disable the rx task. */
 717         bcom_disable(priv->rx_dmatsk);
 718
 719         /* Wait for tx queue to drain, but only if we're in process context */
 720         if (!in_interrupt()) {
 721                 timeout = jiffies + msecs_to_jiffies(2000);
 722                 while (time_before(jiffies, timeout) &&
 723                                 !bcom_queue_empty(priv->tx_dmatsk))
 724                         msleep(100);
 725
 726                 if (time_after_eq(jiffies, timeout))
 727                         dev_err(&dev->dev, "queues didn't drain\n");
 728 #if 1
 729                 if (time_after_eq(jiffies, timeout)) {
 730                         dev_err(&dev->dev, "  tx: index: %i, outdex: %i\n",
 731                                         priv->tx_dmatsk->index,
 732                                         priv->tx_dmatsk->outdex);
 733                         dev_err(&dev->dev, "  rx: index: %i, outdex: %i\n",
 734                                         priv->rx_dmatsk->index,
 735                                         priv->rx_dmatsk->outdex);
 736                 }
 737 #endif
 738         }
 739
 740         bcom_disable(priv->tx_dmatsk);
 741
 742         /* Stop FEC */
 743         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
 744 }
 745
 746 /* reset fec and bestcomm tasks */
 747 static void mpc52xx_fec_reset(struct net_device *dev)
 748 {
 749         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 750         struct mpc52xx_fec __iomem *fec = priv->fec;
 751
 752         mpc52xx_fec_stop(dev);
 753
 754         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
 755         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
 756
 757         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 758
 759         mpc52xx_fec_hw_init(dev);
 760
 761         if (priv->phydev) {
 762                 phy_stop(priv->phydev);
 763                 phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
 764                 phy_start(priv->phydev);
 765         }
 766
 767         bcom_fec_rx_reset(priv->rx_dmatsk);
 768         bcom_fec_tx_reset(priv->tx_dmatsk);
 769
 770         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 771
 772         bcom_enable(priv->rx_dmatsk);
 773         bcom_enable(priv->tx_dmatsk);
 774
 775         mpc52xx_fec_start(dev);
 776 }
 777
 778
 779 /* ethtool interface */
 780 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
 781                 struct ethtool_drvinfo *info)
 782 {
 783         strcpy(info->driver, DRIVER_NAME);
 784 }
 785
 786 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 787 {
 788         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 789
 790         if (!priv->phydev)
 791                 return -ENODEV;
 792
 793         return phy_ethtool_gset(priv->phydev, cmd);
 794 }
 795
 796 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 797 {
 798         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 799
 800         if (!priv->phydev)
 801                 return -ENODEV;
 802
 803         return phy_ethtool_sset(priv->phydev, cmd);
 804 }
 805
 806 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
 807 {
 808         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 809         return priv->msg_enable;
 810 }
 811
 812 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
 813 {
 814         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 815         priv->msg_enable = level;
 816 }
 817
 818 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
 819         .get_drvinfo = mpc52xx_fec_get_drvinfo,
 820         .get_settings = mpc52xx_fec_get_settings,
 821         .set_settings = mpc52xx_fec_set_settings,
 822         .get_link = ethtool_op_get_link,
 823         .get_msglevel = mpc52xx_fec_get_msglevel,
 824         .set_msglevel = mpc52xx_fec_set_msglevel,
 825 };
 826
 827
 828 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 829 {
 830         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 831
 832         if (!priv->phydev)
 833                 return -ENOTSUPP;
 834
 835         return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
 836 }
 837
 838 static const struct net_device_ops mpc52xx_fec_netdev_ops = {
 839         .ndo_open = mpc52xx_fec_open,
 840         .ndo_stop = mpc52xx_fec_close,
 841         .ndo_start_xmit = mpc52xx_fec_start_xmit,
 842         .ndo_set_multicast_list = mpc52xx_fec_set_multicast_list,
 843         .ndo_set_mac_address = mpc52xx_fec_set_mac_address,
 844         .ndo_validate_addr = eth_validate_addr,
 845         .ndo_do_ioctl = mpc52xx_fec_ioctl,
 846         .ndo_change_mtu = eth_change_mtu,
 847         .ndo_tx_timeout = mpc52xx_fec_tx_timeout,
 848         .ndo_get_stats = mpc52xx_fec_get_stats,
 849 #ifdef CONFIG_NET_POLL_CONTROLLER
 850         .ndo_poll_controller = mpc52xx_fec_poll_controller,
 851 #endif
 852 };
 853
 854 /* ======================================================================== */
 855 /* OF Driver                                                                */
 856 /* ======================================================================== */
 857
 858 static int __devinit
 859 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
 860 {
 861         int rv;
 862         struct net_device *ndev;
 863         struct mpc52xx_fec_priv *priv = NULL;
 864         struct resource mem;
 865         const u32 *prop;
 866         int prop_size;
 867
 868         phys_addr_t rx_fifo;
 869         phys_addr_t tx_fifo;
 870
 871         /* Get the ether ndev & it's private zone */
 872         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
 873         if (!ndev)
 874                 return -ENOMEM;
 875
 876         priv = netdev_priv(ndev);
 877         priv->ndev = ndev;
 878
 879         /* Reserve FEC control zone */
 880         rv = of_address_to_resource(op->node, 0, &mem);
 881         if (rv) {
 882                 printk(KERN_ERR DRIVER_NAME ": "
 883                                 "Error while parsing device node resource\n" );
 884                 return rv;
 885         }
 886         if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
 887                 printk(KERN_ERR DRIVER_NAME
 888                         " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
 889                         (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
 890                 return -EINVAL;
 891         }
 892
 893         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
 894                 return -EBUSY;
 895
 896         /* Init ether ndev with what we have */
 897         ndev->netdev_ops        = &mpc52xx_fec_netdev_ops;
 898         ndev->ethtool_ops       = &mpc52xx_fec_ethtool_ops;
 899         ndev->watchdog_timeo    = FEC_WATCHDOG_TIMEOUT;
 900         ndev->base_addr         = mem.start;
 901         SET_NETDEV_DEV(ndev, &op->dev);
 902
 903         spin_lock_init(&priv->lock);
 904
 905         /* ioremap the zones */
 906         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
 907
 908         if (!priv->fec) {
 909                 rv = -ENOMEM;
 910                 goto probe_error;
 911         }
 912
 913         /* Bestcomm init */
 914         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
 915         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
 916
 917         priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
 918         priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
 919
 920         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
 921                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
 922                 rv = -ENOMEM;
 923                 goto probe_error;
 924         }
 925
 926         /* Get the IRQ we need one by one */
 927                 /* Control */
 928         ndev->irq = irq_of_parse_and_map(op->node, 0);
 929
 930                 /* RX */
 931         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
 932
 933                 /* TX */
 934         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
 935
 936         /* MAC address init */
 937         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
 938                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
 939         else
 940                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
 941
 942         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
 943
 944         /*
 945          * Link mode configuration
 946          */
 947
 948         /* Start with safe defaults for link connection */
 949         priv->speed = 100;
 950         priv->duplex = DUPLEX_HALF;
 951         priv->mdio_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
 952
 953         /* The current speed preconfigures the speed of the MII link */
 954         prop = of_get_property(op->node, "current-speed", &prop_size);
 955         if (prop && (prop_size >= sizeof(u32) * 2)) {
 956                 priv->speed = prop[0];
 957                 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
 958         }
 959
 960         /* If there is a phy handle, then get the PHY node */
 961         priv->phy_node = of_parse_phandle(op->node, "phy-handle", 0);
 962
 963         /* the 7-wire property means don't use MII mode */
 964         if (of_find_property(op->node, "fsl,7-wire-mode", NULL)) {
 965                 priv->seven_wire_mode = 1;
 966                 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
 967         }
 968
 969         /* Hardware init */
 970         mpc52xx_fec_hw_init(ndev);
 971         mpc52xx_fec_reset_stats(ndev);
 972
 973         rv = register_netdev(ndev);
 974         if (rv < 0)
 975                 goto probe_error;
 976
 977         /* We're done ! */
 978         dev_set_drvdata(&op->dev, ndev);
 979
 980         return 0;
 981
 982
 983         /* Error handling - free everything that might be allocated */
 984 probe_error:
 985
 986         if (priv->phy_node)
 987                 of_node_put(priv->phy_node);
 988         priv->phy_node = NULL;
 989
 990         irq_dispose_mapping(ndev->irq);
 991
 992         if (priv->rx_dmatsk)
 993                 bcom_fec_rx_release(priv->rx_dmatsk);
 994         if (priv->tx_dmatsk)
 995                 bcom_fec_tx_release(priv->tx_dmatsk);
 996
 997         if (priv->fec)
 998                 iounmap(priv->fec);
 999
1000         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1001
1002         free_netdev(ndev);
1003
1004         return rv;
1005 }
1006
1007 static int
1008 mpc52xx_fec_remove(struct of_device *op)
1009 {
1010         struct net_device *ndev;
1011         struct mpc52xx_fec_priv *priv;
1012
1013         ndev = dev_get_drvdata(&op->dev);
1014         priv = netdev_priv(ndev);
1015
1016         unregister_netdev(ndev);
1017
1018         if (priv->phy_node)
1019                 of_node_put(priv->phy_node);
1020         priv->phy_node = NULL;
1021
1022         irq_dispose_mapping(ndev->irq);
1023
1024         bcom_fec_rx_release(priv->rx_dmatsk);
1025         bcom_fec_tx_release(priv->tx_dmatsk);
1026
1027         iounmap(priv->fec);
1028
1029         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1030
1031         free_netdev(ndev);
1032
1033         dev_set_drvdata(&op->dev, NULL);
1034         return 0;
1035 }
1036
1037 #ifdef CONFIG_PM
1038 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1039 {
1040         struct net_device *dev = dev_get_drvdata(&op->dev);
1041
1042         if (netif_running(dev))
1043                 mpc52xx_fec_close(dev);
1044
1045         return 0;
1046 }
1047
1048 static int mpc52xx_fec_of_resume(struct of_device *op)
1049 {
1050         struct net_device *dev = dev_get_drvdata(&op->dev);
1051
1052         mpc52xx_fec_hw_init(dev);
1053         mpc52xx_fec_reset_stats(dev);
1054
1055         if (netif_running(dev))
1056                 mpc52xx_fec_open(dev);
1057
1058         return 0;
1059 }
1060 #endif
1061
1062 static struct of_device_id mpc52xx_fec_match[] = {
1063         { .compatible = "fsl,mpc5200b-fec", },
1064         { .compatible = "fsl,mpc5200-fec", },
1065         { .compatible = "mpc5200-fec", },
1066         { }
1067 };
1068
1069 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1070
1071 static struct of_platform_driver mpc52xx_fec_driver = {
1072         .owner          = THIS_MODULE,
1073         .name           = DRIVER_NAME,
1074         .match_table    = mpc52xx_fec_match,
1075         .probe          = mpc52xx_fec_probe,
1076         .remove         = mpc52xx_fec_remove,
1077 #ifdef CONFIG_PM
1078         .suspend        = mpc52xx_fec_of_suspend,
1079         .resume         = mpc52xx_fec_of_resume,
1080 #endif
1081 };
1082
1083
1084 /* ======================================================================== */
1085 /* Module                                                                   */
1086 /* ======================================================================== */
1087
1088 static int __init
1089 mpc52xx_fec_init(void)
1090 {
1091 #ifdef CONFIG_FEC_MPC52xx_MDIO
1092         int ret;
1093         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1094         if (ret) {
1095                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1096                 return ret;
1097         }
1098 #endif
1099         return of_register_platform_driver(&mpc52xx_fec_driver);
1100 }
1101
1102 static void __exit
1103 mpc52xx_fec_exit(void)
1104 {
1105         of_unregister_platform_driver(&mpc52xx_fec_driver);
1106 #ifdef CONFIG_FEC_MPC52xx_MDIO
1107         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1108 #endif
1109 }
1110
1111
1112 module_init(mpc52xx_fec_init);
1113 module_exit(mpc52xx_fec_exit);
1114
1115 MODULE_LICENSE("GPL");
1116 MODULE_AUTHOR("Dale Farnsworth");
1117 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");