drivers/net/fs_enet/mac-fcc.c

   1 /*
   2  * FCC driver for Motorola MPC82xx (PQ2).
   3  *
   4  * Copyright (c) 2003 Intracom S.A.
   5  *  by Pantelis Antoniou <panto@intracom.gr>
   6  *
   7  * 2005 (c) MontaVista Software, Inc.
   8  * Vitaly Bordug <vbordug@ru.mvista.com>
   9  *
  10  * This file is licensed under the terms of the GNU General Public License
  11  * version 2. This program is licensed "as is" without any warranty of any
  12  * kind, whether express or implied.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/string.h>
  19 #include <linux/ptrace.h>
  20 #include <linux/errno.h>
  21 #include <linux/ioport.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/init.h>
  25 #include <linux/delay.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/mii.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/bitops.h>
  33 #include <linux/fs.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/phy.h>
  36
  37 #include <asm/immap_cpm2.h>
  38 #include <asm/mpc8260.h>
  39 #include <asm/cpm2.h>
  40
  41 #include <asm/pgtable.h>
  42 #include <asm/irq.h>
  43 #include <asm/uaccess.h>
  44
  45 #ifdef CONFIG_PPC_CPM_NEW_BINDING
  46 #include <asm/of_device.h>
  47 #endif
  48
  49 #include "fs_enet.h"
  50
  51 /*************************************************/
  52
  53 /* FCC access macros */
  54
  55 /* write, read, set bits, clear bits */
  56 #define W32(_p, _m, _v) out_be32(&(_p)->_m, (_v))
  57 #define R32(_p, _m)     in_be32(&(_p)->_m)
  58 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
  59 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
  60
  61 #define W16(_p, _m, _v) out_be16(&(_p)->_m, (_v))
  62 #define R16(_p, _m)     in_be16(&(_p)->_m)
  63 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
  64 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
  65
  66 #define W8(_p, _m, _v)  out_8(&(_p)->_m, (_v))
  67 #define R8(_p, _m)      in_8(&(_p)->_m)
  68 #define S8(_p, _m, _v)  W8(_p, _m, R8(_p, _m) | (_v))
  69 #define C8(_p, _m, _v)  W8(_p, _m, R8(_p, _m) & ~(_v))
  70
  71 /*************************************************/
  72
  73 #define FCC_MAX_MULTICAST_ADDRS 64
  74
  75 #define mk_mii_read(REG)        (0x60020000 | ((REG & 0x1f) << 18))
  76 #define mk_mii_write(REG, VAL)  (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
  77 #define mk_mii_end              0
  78
  79 #define MAX_CR_CMD_LOOPS        10000
  80
  81 static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 op)
  82 {
  83         const struct fs_platform_info *fpi = fep->fpi;
  84         int i;
  85
  86         W32(cpmp, cp_cpcr, fpi->cp_command | op | CPM_CR_FLG);
  87         for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
  88                 if ((R32(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
  89                         return 0;
  90
  91         printk(KERN_ERR "%s(): Not able to issue CPM command\n",
  92                __FUNCTION__);
  93         return 1;
  94 }
  95
  96 static int do_pd_setup(struct fs_enet_private *fep)
  97 {
  98 #ifdef CONFIG_PPC_CPM_NEW_BINDING
  99         struct of_device *ofdev = to_of_device(fep->dev);
 100         struct fs_platform_info *fpi = fep->fpi;
 101         int ret = -EINVAL;
 102
 103         fep->interrupt = of_irq_to_resource(ofdev->node, 0, NULL);
 104         if (fep->interrupt == NO_IRQ)
 105                 goto out;
 106
 107         fep->fcc.fccp = of_iomap(ofdev->node, 0);
 108         if (!fep->fcc.fccp)
 109                 goto out;
 110
 111         fep->fcc.ep = of_iomap(ofdev->node, 1);
 112         if (!fep->fcc.ep)
 113                 goto out_fccp;
 114
 115         fep->fcc.fcccp = of_iomap(ofdev->node, 2);
 116         if (!fep->fcc.fcccp)
 117                 goto out_ep;
 118
 119         fep->fcc.mem = (void __iomem *)cpm2_immr;
 120         fpi->dpram_offset = cpm_dpalloc(128, 8);
 121         if (IS_ERR_VALUE(fpi->dpram_offset)) {
 122                 ret = fpi->dpram_offset;
 123                 goto out_fcccp;
 124         }
 125
 126         return 0;
 127
 128 out_fcccp:
 129         iounmap(fep->fcc.fcccp);
 130 out_ep:
 131         iounmap(fep->fcc.ep);
 132 out_fccp:
 133         iounmap(fep->fcc.fccp);
 134 out:
 135         return ret;
 136 #else
 137         struct platform_device *pdev = to_platform_device(fep->dev);
 138         struct resource *r;
 139
 140         /* Fill out IRQ field */
 141         fep->interrupt = platform_get_irq(pdev, 0);
 142         if (fep->interrupt < 0)
 143                 return -EINVAL;
 144
 145         /* Attach the memory for the FCC Parameter RAM */
 146         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_pram");
 147         fep->fcc.ep = ioremap(r->start, r->end - r->start + 1);
 148         if (fep->fcc.ep == NULL)
 149                 return -EINVAL;
 150
 151         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_regs");
 152         fep->fcc.fccp = ioremap(r->start, r->end - r->start + 1);
 153         if (fep->fcc.fccp == NULL)
 154                 return -EINVAL;
 155
 156         if (fep->fpi->fcc_regs_c) {
 157                 fep->fcc.fcccp = (void __iomem *)fep->fpi->fcc_regs_c;
 158         } else {
 159                 r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 160                                 "fcc_regs_c");
 161                 fep->fcc.fcccp = ioremap(r->start,
 162                                 r->end - r->start + 1);
 163         }
 164
 165         if (fep->fcc.fcccp == NULL)
 166                 return -EINVAL;
 167
 168         fep->fcc.mem = (void __iomem *)fep->fpi->mem_offset;
 169         if (fep->fcc.mem == NULL)
 170                 return -EINVAL;
 171
 172         return 0;
 173 #endif
 174 }
 175
 176 #define FCC_NAPI_RX_EVENT_MSK   (FCC_ENET_RXF | FCC_ENET_RXB)
 177 #define FCC_RX_EVENT            (FCC_ENET_RXF)
 178 #define FCC_TX_EVENT            (FCC_ENET_TXB)
 179 #define FCC_ERR_EVENT_MSK       (FCC_ENET_TXE | FCC_ENET_BSY)
 180
 181 static int setup_data(struct net_device *dev)
 182 {
 183         struct fs_enet_private *fep = netdev_priv(dev);
 184 #ifndef CONFIG_PPC_CPM_NEW_BINDING
 185         struct fs_platform_info *fpi = fep->fpi;
 186
 187         fpi->cp_command = (fpi->cp_page << 26) |
 188                           (fpi->cp_block << 21) |
 189                           (12 << 6);
 190
 191         fep->fcc.idx = fs_get_fcc_index(fpi->fs_no);
 192         if ((unsigned int)fep->fcc.idx >= 3)    /* max 3 FCCs */
 193                 return -EINVAL;
 194 #endif
 195
 196         if (do_pd_setup(fep) != 0)
 197                 return -EINVAL;
 198
 199         fep->ev_napi_rx = FCC_NAPI_RX_EVENT_MSK;
 200         fep->ev_rx = FCC_RX_EVENT;
 201         fep->ev_tx = FCC_TX_EVENT;
 202         fep->ev_err = FCC_ERR_EVENT_MSK;
 203
 204         return 0;
 205 }
 206
 207 static int allocate_bd(struct net_device *dev)
 208 {
 209         struct fs_enet_private *fep = netdev_priv(dev);
 210         const struct fs_platform_info *fpi = fep->fpi;
 211
 212         fep->ring_base = (void __iomem __force *)dma_alloc_coherent(fep->dev,
 213                                             (fpi->tx_ring + fpi->rx_ring) *
 214                                             sizeof(cbd_t), &fep->ring_mem_addr,
 215                                             GFP_KERNEL);
 216         if (fep->ring_base == NULL)
 217                 return -ENOMEM;
 218
 219         return 0;
 220 }
 221
 222 static void free_bd(struct net_device *dev)
 223 {
 224         struct fs_enet_private *fep = netdev_priv(dev);
 225         const struct fs_platform_info *fpi = fep->fpi;
 226
 227         if (fep->ring_base)
 228                 dma_free_coherent(fep->dev,
 229                         (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
 230                         (void __force *)fep->ring_base, fep->ring_mem_addr);
 231 }
 232
 233 static void cleanup_data(struct net_device *dev)
 234 {
 235         /* nothing */
 236 }
 237
 238 static void set_promiscuous_mode(struct net_device *dev)
 239 {
 240         struct fs_enet_private *fep = netdev_priv(dev);
 241         fcc_t __iomem *fccp = fep->fcc.fccp;
 242
 243         S32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
 244 }
 245
 246 static void set_multicast_start(struct net_device *dev)
 247 {
 248         struct fs_enet_private *fep = netdev_priv(dev);
 249         fcc_enet_t __iomem *ep = fep->fcc.ep;
 250
 251         W32(ep, fen_gaddrh, 0);
 252         W32(ep, fen_gaddrl, 0);
 253 }
 254
 255 static void set_multicast_one(struct net_device *dev, const u8 *mac)
 256 {
 257         struct fs_enet_private *fep = netdev_priv(dev);
 258         fcc_enet_t __iomem *ep = fep->fcc.ep;
 259         u16 taddrh, taddrm, taddrl;
 260
 261         taddrh = ((u16)mac[5] << 8) | mac[4];
 262         taddrm = ((u16)mac[3] << 8) | mac[2];
 263         taddrl = ((u16)mac[1] << 8) | mac[0];
 264
 265         W16(ep, fen_taddrh, taddrh);
 266         W16(ep, fen_taddrm, taddrm);
 267         W16(ep, fen_taddrl, taddrl);
 268         fcc_cr_cmd(fep, CPM_CR_SET_GADDR);
 269 }
 270
 271 static void set_multicast_finish(struct net_device *dev)
 272 {
 273         struct fs_enet_private *fep = netdev_priv(dev);
 274         fcc_t __iomem *fccp = fep->fcc.fccp;
 275         fcc_enet_t __iomem *ep = fep->fcc.ep;
 276
 277         /* clear promiscuous always */
 278         C32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
 279
 280         /* if all multi or too many multicasts; just enable all */
 281         if ((dev->flags & IFF_ALLMULTI) != 0 ||
 282             dev->mc_count > FCC_MAX_MULTICAST_ADDRS) {
 283
 284                 W32(ep, fen_gaddrh, 0xffffffff);
 285                 W32(ep, fen_gaddrl, 0xffffffff);
 286         }
 287
 288         /* read back */
 289         fep->fcc.gaddrh = R32(ep, fen_gaddrh);
 290         fep->fcc.gaddrl = R32(ep, fen_gaddrl);
 291 }
 292
 293 static void set_multicast_list(struct net_device *dev)
 294 {
 295         struct dev_mc_list *pmc;
 296
 297         if ((dev->flags & IFF_PROMISC) == 0) {
 298                 set_multicast_start(dev);
 299                 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
 300                         set_multicast_one(dev, pmc->dmi_addr);
 301                 set_multicast_finish(dev);
 302         } else
 303                 set_promiscuous_mode(dev);
 304 }
 305
 306 static void restart(struct net_device *dev)
 307 {
 308         struct fs_enet_private *fep = netdev_priv(dev);
 309         const struct fs_platform_info *fpi = fep->fpi;
 310         fcc_t __iomem *fccp = fep->fcc.fccp;
 311         fcc_c_t __iomem *fcccp = fep->fcc.fcccp;
 312         fcc_enet_t __iomem *ep = fep->fcc.ep;
 313         dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
 314         u16 paddrh, paddrm, paddrl;
 315 #ifndef CONFIG_PPC_CPM_NEW_BINDING
 316         u16 mem_addr;
 317 #endif
 318         const unsigned char *mac;
 319         int i;
 320
 321         C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
 322
 323         /* clear everything (slow & steady does it) */
 324         for (i = 0; i < sizeof(*ep); i++)
 325                 out_8((u8 __iomem *)ep + i, 0);
 326
 327         /* get physical address */
 328         rx_bd_base_phys = fep->ring_mem_addr;
 329         tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
 330
 331         /* point to bds */
 332         W32(ep, fen_genfcc.fcc_rbase, rx_bd_base_phys);
 333         W32(ep, fen_genfcc.fcc_tbase, tx_bd_base_phys);
 334
 335         /* Set maximum bytes per receive buffer.
 336          * It must be a multiple of 32.
 337          */
 338         W16(ep, fen_genfcc.fcc_mrblr, PKT_MAXBLR_SIZE);
 339
 340         W32(ep, fen_genfcc.fcc_rstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
 341         W32(ep, fen_genfcc.fcc_tstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
 342
 343         /* Allocate space in the reserved FCC area of DPRAM for the
 344          * internal buffers.  No one uses this space (yet), so we
 345          * can do this.  Later, we will add resource management for
 346          * this area.
 347          */
 348
 349 #ifdef CONFIG_PPC_CPM_NEW_BINDING
 350         W16(ep, fen_genfcc.fcc_riptr, fpi->dpram_offset);
 351         W16(ep, fen_genfcc.fcc_tiptr, fpi->dpram_offset + 32);
 352
 353         W16(ep, fen_padptr, fpi->dpram_offset + 64);
 354 #else
 355         mem_addr = (u32) fep->fcc.mem;  /* de-fixup dpram offset */
 356
 357         W16(ep, fen_genfcc.fcc_riptr, (mem_addr & 0xffff));
 358         W16(ep, fen_genfcc.fcc_tiptr, ((mem_addr + 32) & 0xffff));
 359
 360         W16(ep, fen_padptr, mem_addr + 64);
 361 #endif
 362
 363         /* fill with special symbol...  */
 364         memset_io(fep->fcc.mem + fpi->dpram_offset + 64, 0x88, 32);
 365
 366         W32(ep, fen_genfcc.fcc_rbptr, 0);
 367         W32(ep, fen_genfcc.fcc_tbptr, 0);
 368         W32(ep, fen_genfcc.fcc_rcrc, 0);
 369         W32(ep, fen_genfcc.fcc_tcrc, 0);
 370         W16(ep, fen_genfcc.fcc_res1, 0);
 371         W32(ep, fen_genfcc.fcc_res2, 0);
 372
 373         /* no CAM */
 374         W32(ep, fen_camptr, 0);
 375
 376         /* Set CRC preset and mask */
 377         W32(ep, fen_cmask, 0xdebb20e3);
 378         W32(ep, fen_cpres, 0xffffffff);
 379
 380         W32(ep, fen_crcec, 0);          /* CRC Error counter       */
 381         W32(ep, fen_alec, 0);           /* alignment error counter */
 382         W32(ep, fen_disfc, 0);          /* discard frame counter   */
 383         W16(ep, fen_retlim, 15);        /* Retry limit threshold   */
 384         W16(ep, fen_pper, 0);           /* Normal persistence      */
 385
 386         /* set group address */
 387         W32(ep, fen_gaddrh, fep->fcc.gaddrh);
 388         W32(ep, fen_gaddrl, fep->fcc.gaddrh);
 389
 390         /* Clear hash filter tables */
 391         W32(ep, fen_iaddrh, 0);
 392         W32(ep, fen_iaddrl, 0);
 393
 394         /* Clear the Out-of-sequence TxBD  */
 395         W16(ep, fen_tfcstat, 0);
 396         W16(ep, fen_tfclen, 0);
 397         W32(ep, fen_tfcptr, 0);
 398
 399         W16(ep, fen_mflr, PKT_MAXBUF_SIZE);     /* maximum frame length register */
 400         W16(ep, fen_minflr, PKT_MINBUF_SIZE);   /* minimum frame length register */
 401
 402         /* set address */
 403         mac = dev->dev_addr;
 404         paddrh = ((u16)mac[5] << 8) | mac[4];
 405         paddrm = ((u16)mac[3] << 8) | mac[2];
 406         paddrl = ((u16)mac[1] << 8) | mac[0];
 407
 408         W16(ep, fen_paddrh, paddrh);
 409         W16(ep, fen_paddrm, paddrm);
 410         W16(ep, fen_paddrl, paddrl);
 411
 412         W16(ep, fen_taddrh, 0);
 413         W16(ep, fen_taddrm, 0);
 414         W16(ep, fen_taddrl, 0);
 415
 416         W16(ep, fen_maxd1, 1520);       /* maximum DMA1 length */
 417         W16(ep, fen_maxd2, 1520);       /* maximum DMA2 length */
 418
 419         /* Clear stat counters, in case we ever enable RMON */
 420         W32(ep, fen_octc, 0);
 421         W32(ep, fen_colc, 0);
 422         W32(ep, fen_broc, 0);
 423         W32(ep, fen_mulc, 0);
 424         W32(ep, fen_uspc, 0);
 425         W32(ep, fen_frgc, 0);
 426         W32(ep, fen_ospc, 0);
 427         W32(ep, fen_jbrc, 0);
 428         W32(ep, fen_p64c, 0);
 429         W32(ep, fen_p65c, 0);
 430         W32(ep, fen_p128c, 0);
 431         W32(ep, fen_p256c, 0);
 432         W32(ep, fen_p512c, 0);
 433         W32(ep, fen_p1024c, 0);
 434
 435         W16(ep, fen_rfthr, 0);  /* Suggested by manual */
 436         W16(ep, fen_rfcnt, 0);
 437         W16(ep, fen_cftype, 0);
 438
 439         fs_init_bds(dev);
 440
 441         /* adjust to speed (for RMII mode) */
 442         if (fpi->use_rmii) {
 443                 if (fep->phydev->speed == 100)
 444                         C8(fcccp, fcc_gfemr, 0x20);
 445                 else
 446                         S8(fcccp, fcc_gfemr, 0x20);
 447         }
 448
 449         fcc_cr_cmd(fep, CPM_CR_INIT_TRX);
 450
 451         /* clear events */
 452         W16(fccp, fcc_fcce, 0xffff);
 453
 454         /* Enable interrupts we wish to service */
 455         W16(fccp, fcc_fccm, FCC_ENET_TXE | FCC_ENET_RXF | FCC_ENET_TXB);
 456
 457         /* Set GFMR to enable Ethernet operating mode */
 458         W32(fccp, fcc_gfmr, FCC_GFMR_TCI | FCC_GFMR_MODE_ENET);
 459
 460         /* set sync/delimiters */
 461         W16(fccp, fcc_fdsr, 0xd555);
 462
 463         W32(fccp, fcc_fpsmr, FCC_PSMR_ENCRC);
 464
 465         if (fpi->use_rmii)
 466                 S32(fccp, fcc_fpsmr, FCC_PSMR_RMII);
 467
 468         /* adjust to duplex mode */
 469         if (fep->phydev->duplex)
 470                 S32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
 471         else
 472                 C32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
 473
 474         S32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
 475 }
 476
 477 static void stop(struct net_device *dev)
 478 {
 479         struct fs_enet_private *fep = netdev_priv(dev);
 480         fcc_t __iomem *fccp = fep->fcc.fccp;
 481
 482         /* stop ethernet */
 483         C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
 484
 485         /* clear events */
 486         W16(fccp, fcc_fcce, 0xffff);
 487
 488         /* clear interrupt mask */
 489         W16(fccp, fcc_fccm, 0);
 490
 491         fs_cleanup_bds(dev);
 492 }
 493
 494 static void pre_request_irq(struct net_device *dev, int irq)
 495 {
 496         /* nothing */
 497 }
 498
 499 static void post_free_irq(struct net_device *dev, int irq)
 500 {
 501         /* nothing */
 502 }
 503
 504 static void napi_clear_rx_event(struct net_device *dev)
 505 {
 506         struct fs_enet_private *fep = netdev_priv(dev);
 507         fcc_t __iomem *fccp = fep->fcc.fccp;
 508
 509         W16(fccp, fcc_fcce, FCC_NAPI_RX_EVENT_MSK);
 510 }
 511
 512 static void napi_enable_rx(struct net_device *dev)
 513 {
 514         struct fs_enet_private *fep = netdev_priv(dev);
 515         fcc_t __iomem *fccp = fep->fcc.fccp;
 516
 517         S16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK);
 518 }
 519
 520 static void napi_disable_rx(struct net_device *dev)
 521 {
 522         struct fs_enet_private *fep = netdev_priv(dev);
 523         fcc_t __iomem *fccp = fep->fcc.fccp;
 524
 525         C16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK);
 526 }
 527
 528 static void rx_bd_done(struct net_device *dev)
 529 {
 530         /* nothing */
 531 }
 532
 533 static void tx_kickstart(struct net_device *dev)
 534 {
 535         struct fs_enet_private *fep = netdev_priv(dev);
 536         fcc_t __iomem *fccp = fep->fcc.fccp;
 537
 538         S16(fccp, fcc_ftodr, 0x8000);
 539 }
 540
 541 static u32 get_int_events(struct net_device *dev)
 542 {
 543         struct fs_enet_private *fep = netdev_priv(dev);
 544         fcc_t __iomem *fccp = fep->fcc.fccp;
 545
 546         return (u32)R16(fccp, fcc_fcce);
 547 }
 548
 549 static void clear_int_events(struct net_device *dev, u32 int_events)
 550 {
 551         struct fs_enet_private *fep = netdev_priv(dev);
 552         fcc_t __iomem *fccp = fep->fcc.fccp;
 553
 554         W16(fccp, fcc_fcce, int_events & 0xffff);
 555 }
 556
 557 static void ev_error(struct net_device *dev, u32 int_events)
 558 {
 559         printk(KERN_WARNING DRV_MODULE_NAME
 560                ": %s FS_ENET ERROR(s) 0x%x\n", dev->name, int_events);
 561 }
 562
 563 static int get_regs(struct net_device *dev, void *p, int *sizep)
 564 {
 565         struct fs_enet_private *fep = netdev_priv(dev);
 566
 567         if (*sizep < sizeof(fcc_t) + sizeof(fcc_enet_t) + 1)
 568                 return -EINVAL;
 569
 570         memcpy_fromio(p, fep->fcc.fccp, sizeof(fcc_t));
 571         p = (char *)p + sizeof(fcc_t);
 572
 573         memcpy_fromio(p, fep->fcc.ep, sizeof(fcc_enet_t));
 574         p = (char *)p + sizeof(fcc_enet_t);
 575
 576         memcpy_fromio(p, fep->fcc.fcccp, 1);
 577         return 0;
 578 }
 579
 580 static int get_regs_len(struct net_device *dev)
 581 {
 582         return sizeof(fcc_t) + sizeof(fcc_enet_t) + 1;
 583 }
 584
 585 /* Some transmit errors cause the transmitter to shut
 586  * down.  We now issue a restart transmit.  Since the
 587  * errors close the BD and update the pointers, the restart
 588  * _should_ pick up without having to reset any of our
 589  * pointers either.  Also, To workaround 8260 device erratum
 590  * CPM37, we must disable and then re-enable the transmitter
 591  * following a Late Collision, Underrun, or Retry Limit error.
 592  */
 593 static void tx_restart(struct net_device *dev)
 594 {
 595         struct fs_enet_private *fep = netdev_priv(dev);
 596         fcc_t __iomem *fccp = fep->fcc.fccp;
 597
 598         C32(fccp, fcc_gfmr, FCC_GFMR_ENT);
 599         udelay(10);
 600         S32(fccp, fcc_gfmr, FCC_GFMR_ENT);
 601
 602         fcc_cr_cmd(fep, CPM_CR_RESTART_TX);
 603 }
 604
 605 /*************************************************************************/
 606
 607 const struct fs_ops fs_fcc_ops = {
 608         .setup_data             = setup_data,
 609         .cleanup_data           = cleanup_data,
 610         .set_multicast_list     = set_multicast_list,
 611         .restart                = restart,
 612         .stop                   = stop,
 613         .pre_request_irq        = pre_request_irq,
 614         .post_free_irq          = post_free_irq,
 615         .napi_clear_rx_event    = napi_clear_rx_event,
 616         .napi_enable_rx         = napi_enable_rx,
 617         .napi_disable_rx        = napi_disable_rx,
 618         .rx_bd_done             = rx_bd_done,
 619         .tx_kickstart           = tx_kickstart,
 620         .get_int_events         = get_int_events,
 621         .clear_int_events       = clear_int_events,
 622         .ev_error               = ev_error,
 623         .get_regs               = get_regs,
 624         .get_regs_len           = get_regs_len,
 625         .tx_restart             = tx_restart,
 626         .allocate_bd            = allocate_bd,
 627         .free_bd                = free_bd,
 628 };