git.oblomov.eu Git - linux-2.6/blob - drivers/net/sunbmac.c

   1 /* $Id: sunbmac.c,v 1.30 2002/01/15 06:48:55 davem Exp $
   2  * sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
   3  *
   4  * Copyright (C) 1997, 1998, 1999, 2003 David S. Miller (davem@redhat.com)
   5  */
   6
   7 #include <linux/module.h>
   8
   9 #include <linux/kernel.h>
  10 #include <linux/types.h>
  11 #include <linux/fcntl.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/ioport.h>
  14 #include <linux/in.h>
  15 #include <linux/slab.h>
  16 #include <linux/string.h>
  17 #include <linux/delay.h>
  18 #include <linux/init.h>
  19 #include <linux/crc32.h>
  20 #include <linux/errno.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/bitops.h>
  26
  27 #include <asm/auxio.h>
  28 #include <asm/byteorder.h>
  29 #include <asm/dma.h>
  30 #include <asm/idprom.h>
  31 #include <asm/io.h>
  32 #include <asm/openprom.h>
  33 #include <asm/oplib.h>
  34 #include <asm/pgtable.h>
  35 #include <asm/sbus.h>
  36 #include <asm/system.h>
  37
  38 #include "sunbmac.h"
  39
  40 #define DRV_NAME        "sunbmac"
  41 #define DRV_VERSION     "2.0"
  42 #define DRV_RELDATE     "11/24/03"
  43 #define DRV_AUTHOR      "David S. Miller (davem@redhat.com)"
  44
  45 static char version[] __initdata =
  46         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
  47
  48 MODULE_VERSION(DRV_VERSION);
  49 MODULE_AUTHOR(DRV_AUTHOR);
  50 MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
  51 MODULE_LICENSE("GPL");
  52
  53 #undef DEBUG_PROBE
  54 #undef DEBUG_TX
  55 #undef DEBUG_IRQ
  56
  57 #ifdef DEBUG_PROBE
  58 #define DP(x)  printk x
  59 #else
  60 #define DP(x)
  61 #endif
  62
  63 #ifdef DEBUG_TX
  64 #define DTX(x)  printk x
  65 #else
  66 #define DTX(x)
  67 #endif
  68
  69 #ifdef DEBUG_IRQ
  70 #define DIRQ(x)  printk x
  71 #else
  72 #define DIRQ(x)
  73 #endif
  74
  75 static struct bigmac *root_bigmac_dev;
  76
  77 #define DEFAULT_JAMSIZE    4 /* Toe jam */
  78
  79 #define QEC_RESET_TRIES 200
  80
  81 static int qec_global_reset(void __iomem *gregs)
  82 {
  83         int tries = QEC_RESET_TRIES;
  84
  85         sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
  86         while (--tries) {
  87                 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
  88                         udelay(20);
  89                         continue;
  90                 }
  91                 break;
  92         }
  93         if (tries)
  94                 return 0;
  95         printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
  96         return -1;
  97 }
  98
  99 static void qec_init(struct bigmac *bp)
 100 {
 101         void __iomem *gregs = bp->gregs;
 102         struct sbus_dev *qec_sdev = bp->qec_sdev;
 103         u8 bsizes = bp->bigmac_bursts;
 104         u32 regval;
 105
 106         /* 64byte bursts do not work at the moment, do
 107          * not even try to enable them.  -DaveM
 108          */
 109         if (bsizes & DMA_BURST32)
 110                 regval = GLOB_CTRL_B32;
 111         else
 112                 regval = GLOB_CTRL_B16;
 113         sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
 114         sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
 115
 116         /* All of memsize is given to bigmac. */
 117         sbus_writel(qec_sdev->reg_addrs[1].reg_size,
 118                     gregs + GLOB_MSIZE);
 119
 120         /* Half to the transmitter, half to the receiver. */
 121         sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
 122                     gregs + GLOB_TSIZE);
 123         sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
 124                     gregs + GLOB_RSIZE);
 125 }
 126
 127 #define TX_RESET_TRIES     32
 128 #define RX_RESET_TRIES     32
 129
 130 static void bigmac_tx_reset(void __iomem *bregs)
 131 {
 132         int tries = TX_RESET_TRIES;
 133
 134         sbus_writel(0, bregs + BMAC_TXCFG);
 135
 136         /* The fifo threshold bit is read-only and does
 137          * not clear.  -DaveM
 138          */
 139         while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
 140                --tries != 0)
 141                 udelay(20);
 142
 143         if (!tries) {
 144                 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
 145                 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
 146                        sbus_readl(bregs + BMAC_TXCFG));
 147         }
 148 }
 149
 150 static void bigmac_rx_reset(void __iomem *bregs)
 151 {
 152         int tries = RX_RESET_TRIES;
 153
 154         sbus_writel(0, bregs + BMAC_RXCFG);
 155         while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
 156                 udelay(20);
 157
 158         if (!tries) {
 159                 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
 160                 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
 161                        sbus_readl(bregs + BMAC_RXCFG));
 162         }
 163 }
 164
 165 /* Reset the transmitter and receiver. */
 166 static void bigmac_stop(struct bigmac *bp)
 167 {
 168         bigmac_tx_reset(bp->bregs);
 169         bigmac_rx_reset(bp->bregs);
 170 }
 171
 172 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
 173 {
 174         struct net_device_stats *stats = &bp->enet_stats;
 175
 176         stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
 177         sbus_writel(0, bregs + BMAC_RCRCECTR);
 178
 179         stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
 180         sbus_writel(0, bregs + BMAC_UNALECTR);
 181
 182         stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
 183         sbus_writel(0, bregs + BMAC_GLECTR);
 184
 185         stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
 186
 187         stats->collisions +=
 188                 (sbus_readl(bregs + BMAC_EXCTR) +
 189                  sbus_readl(bregs + BMAC_LTCTR));
 190         sbus_writel(0, bregs + BMAC_EXCTR);
 191         sbus_writel(0, bregs + BMAC_LTCTR);
 192 }
 193
 194 static void bigmac_clean_rings(struct bigmac *bp)
 195 {
 196         int i;
 197
 198         for (i = 0; i < RX_RING_SIZE; i++) {
 199                 if (bp->rx_skbs[i] != NULL) {
 200                         dev_kfree_skb_any(bp->rx_skbs[i]);
 201                         bp->rx_skbs[i] = NULL;
 202                 }
 203         }
 204
 205         for (i = 0; i < TX_RING_SIZE; i++) {
 206                 if (bp->tx_skbs[i] != NULL) {
 207                         dev_kfree_skb_any(bp->tx_skbs[i]);
 208                         bp->tx_skbs[i] = NULL;
 209                 }
 210         }
 211 }
 212
 213 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
 214 {
 215         struct bmac_init_block *bb = bp->bmac_block;
 216         struct net_device *dev = bp->dev;
 217         int i, gfp_flags = GFP_KERNEL;
 218
 219         if (from_irq || in_interrupt())
 220                 gfp_flags = GFP_ATOMIC;
 221
 222         bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
 223
 224         /* Free any skippy bufs left around in the rings. */
 225         bigmac_clean_rings(bp);
 226
 227         /* Now get new skbufs for the receive ring. */
 228         for (i = 0; i < RX_RING_SIZE; i++) {
 229                 struct sk_buff *skb;
 230
 231                 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
 232                 if (!skb)
 233                         continue;
 234
 235                 bp->rx_skbs[i] = skb;
 236                 skb->dev = dev;
 237
 238                 /* Because we reserve afterwards. */
 239                 skb_put(skb, ETH_FRAME_LEN);
 240                 skb_reserve(skb, 34);
 241
 242                 bb->be_rxd[i].rx_addr =
 243                         sbus_map_single(bp->bigmac_sdev, skb->data,
 244                                         RX_BUF_ALLOC_SIZE - 34,
 245                                         SBUS_DMA_FROMDEVICE);
 246                 bb->be_rxd[i].rx_flags =
 247                         (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 248         }
 249
 250         for (i = 0; i < TX_RING_SIZE; i++)
 251                 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
 252 }
 253
 254 #define MGMT_CLKON  (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
 255 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
 256
 257 static void idle_transceiver(void __iomem *tregs)
 258 {
 259         int i = 20;
 260
 261         while (i--) {
 262                 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
 263                 sbus_readl(tregs + TCVR_MPAL);
 264                 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
 265                 sbus_readl(tregs + TCVR_MPAL);
 266         }
 267 }
 268
 269 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
 270 {
 271         if (bp->tcvr_type == internal) {
 272                 bit = (bit & 1) << 3;
 273                 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
 274                             tregs + TCVR_MPAL);
 275                 sbus_readl(tregs + TCVR_MPAL);
 276                 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 277                             tregs + TCVR_MPAL);
 278                 sbus_readl(tregs + TCVR_MPAL);
 279         } else if (bp->tcvr_type == external) {
 280                 bit = (bit & 1) << 2;
 281                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
 282                             tregs + TCVR_MPAL);
 283                 sbus_readl(tregs + TCVR_MPAL);
 284                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
 285                             tregs + TCVR_MPAL);
 286                 sbus_readl(tregs + TCVR_MPAL);
 287         } else {
 288                 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
 289         }
 290 }
 291
 292 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
 293 {
 294         int retval = 0;
 295
 296         if (bp->tcvr_type == internal) {
 297                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 298                 sbus_readl(tregs + TCVR_MPAL);
 299                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 300                             tregs + TCVR_MPAL);
 301                 sbus_readl(tregs + TCVR_MPAL);
 302                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 303         } else if (bp->tcvr_type == external) {
 304                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 305                 sbus_readl(tregs + TCVR_MPAL);
 306                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 307                 sbus_readl(tregs + TCVR_MPAL);
 308                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 309         } else {
 310                 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
 311         }
 312         return retval;
 313 }
 314
 315 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
 316 {
 317         int retval = 0;
 318
 319         if (bp->tcvr_type == internal) {
 320                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 321                 sbus_readl(tregs + TCVR_MPAL);
 322                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 323                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 324                 sbus_readl(tregs + TCVR_MPAL);
 325         } else if (bp->tcvr_type == external) {
 326                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 327                 sbus_readl(tregs + TCVR_MPAL);
 328                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 329                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 330                 sbus_readl(tregs + TCVR_MPAL);
 331         } else {
 332                 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
 333         }
 334         return retval;
 335 }
 336
 337 static void put_tcvr_byte(struct bigmac *bp,
 338                           void __iomem *tregs,
 339                           unsigned int byte)
 340 {
 341         int shift = 4;
 342
 343         do {
 344                 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
 345                 shift -= 1;
 346         } while (shift >= 0);
 347 }
 348
 349 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
 350                               int reg, unsigned short val)
 351 {
 352         int shift;
 353
 354         reg &= 0xff;
 355         val &= 0xffff;
 356         switch(bp->tcvr_type) {
 357         case internal:
 358         case external:
 359                 break;
 360
 361         default:
 362                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 363                 return;
 364         };
 365
 366         idle_transceiver(tregs);
 367         write_tcvr_bit(bp, tregs, 0);
 368         write_tcvr_bit(bp, tregs, 1);
 369         write_tcvr_bit(bp, tregs, 0);
 370         write_tcvr_bit(bp, tregs, 1);
 371
 372         put_tcvr_byte(bp, tregs,
 373                       ((bp->tcvr_type == internal) ?
 374                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 375
 376         put_tcvr_byte(bp, tregs, reg);
 377
 378         write_tcvr_bit(bp, tregs, 1);
 379         write_tcvr_bit(bp, tregs, 0);
 380
 381         shift = 15;
 382         do {
 383                 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
 384                 shift -= 1;
 385         } while (shift >= 0);
 386 }
 387
 388 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
 389                                        void __iomem *tregs,
 390                                        int reg)
 391 {
 392         unsigned short retval = 0;
 393
 394         reg &= 0xff;
 395         switch(bp->tcvr_type) {
 396         case internal:
 397         case external:
 398                 break;
 399
 400         default:
 401                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 402                 return 0xffff;
 403         };
 404
 405         idle_transceiver(tregs);
 406         write_tcvr_bit(bp, tregs, 0);
 407         write_tcvr_bit(bp, tregs, 1);
 408         write_tcvr_bit(bp, tregs, 1);
 409         write_tcvr_bit(bp, tregs, 0);
 410
 411         put_tcvr_byte(bp, tregs,
 412                       ((bp->tcvr_type == internal) ?
 413                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 414
 415         put_tcvr_byte(bp, tregs, reg);
 416
 417         if (bp->tcvr_type == external) {
 418                 int shift = 15;
 419
 420                 (void) read_tcvr_bit2(bp, tregs);
 421                 (void) read_tcvr_bit2(bp, tregs);
 422
 423                 do {
 424                         int tmp;
 425
 426                         tmp = read_tcvr_bit2(bp, tregs);
 427                         retval |= ((tmp & 1) << shift);
 428                         shift -= 1;
 429                 } while (shift >= 0);
 430
 431                 (void) read_tcvr_bit2(bp, tregs);
 432                 (void) read_tcvr_bit2(bp, tregs);
 433                 (void) read_tcvr_bit2(bp, tregs);
 434         } else {
 435                 int shift = 15;
 436
 437                 (void) read_tcvr_bit(bp, tregs);
 438                 (void) read_tcvr_bit(bp, tregs);
 439
 440                 do {
 441                         int tmp;
 442
 443                         tmp = read_tcvr_bit(bp, tregs);
 444                         retval |= ((tmp & 1) << shift);
 445                         shift -= 1;
 446                 } while (shift >= 0);
 447
 448                 (void) read_tcvr_bit(bp, tregs);
 449                 (void) read_tcvr_bit(bp, tregs);
 450                 (void) read_tcvr_bit(bp, tregs);
 451         }
 452         return retval;
 453 }
 454
 455 static void bigmac_tcvr_init(struct bigmac *bp)
 456 {
 457         void __iomem *tregs = bp->tregs;
 458         u32 mpal;
 459
 460         idle_transceiver(tregs);
 461         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 462                     tregs + TCVR_MPAL);
 463         sbus_readl(tregs + TCVR_MPAL);
 464
 465         /* Only the bit for the present transceiver (internal or
 466          * external) will stick, set them both and see what stays.
 467          */
 468         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 469         sbus_readl(tregs + TCVR_MPAL);
 470         udelay(20);
 471
 472         mpal = sbus_readl(tregs + TCVR_MPAL);
 473         if (mpal & MGMT_PAL_EXT_MDIO) {
 474                 bp->tcvr_type = external;
 475                 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 476                             tregs + TCVR_TPAL);
 477                 sbus_readl(tregs + TCVR_TPAL);
 478         } else if (mpal & MGMT_PAL_INT_MDIO) {
 479                 bp->tcvr_type = internal;
 480                 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
 481                               TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 482                             tregs + TCVR_TPAL);
 483                 sbus_readl(tregs + TCVR_TPAL);
 484         } else {
 485                 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
 486                        "external MDIO available!\n");
 487                 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
 488                        sbus_readl(tregs + TCVR_MPAL),
 489                        sbus_readl(tregs + TCVR_TPAL));
 490         }
 491 }
 492
 493 static int bigmac_init(struct bigmac *, int);
 494
 495 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
 496 {
 497         if (bp->sw_bmcr & BMCR_SPEED100) {
 498                 int timeout;
 499
 500                 /* Reset the PHY. */
 501                 bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 502                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 503                 bp->sw_bmcr     = (BMCR_RESET);
 504                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 505
 506                 timeout = 64;
 507                 while (--timeout) {
 508                         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 509                         if ((bp->sw_bmcr & BMCR_RESET) == 0)
 510                                 break;
 511                         udelay(20);
 512                 }
 513                 if (timeout == 0)
 514                         printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 515
 516                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 517
 518                 /* Now we try 10baseT. */
 519                 bp->sw_bmcr &= ~(BMCR_SPEED100);
 520                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 521                 return 0;
 522         }
 523
 524         /* We've tried them all. */
 525         return -1;
 526 }
 527
 528 static void bigmac_timer(unsigned long data)
 529 {
 530         struct bigmac *bp = (struct bigmac *) data;
 531         void __iomem *tregs = bp->tregs;
 532         int restart_timer = 0;
 533
 534         bp->timer_ticks++;
 535         if (bp->timer_state == ltrywait) {
 536                 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 537                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 538                 if (bp->sw_bmsr & BMSR_LSTATUS) {
 539                         printk(KERN_INFO "%s: Link is now up at %s.\n",
 540                                bp->dev->name,
 541                                (bp->sw_bmcr & BMCR_SPEED100) ?
 542                                "100baseT" : "10baseT");
 543                         bp->timer_state = asleep;
 544                         restart_timer = 0;
 545                 } else {
 546                         if (bp->timer_ticks >= 4) {
 547                                 int ret;
 548
 549                                 ret = try_next_permutation(bp, tregs);
 550                                 if (ret == -1) {
 551                                         printk(KERN_ERR "%s: Link down, cable problem?\n",
 552                                                bp->dev->name);
 553                                         ret = bigmac_init(bp, 0);
 554                                         if (ret) {
 555                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 556                                                        "BigMAC.\n", bp->dev->name);
 557                                         }
 558                                         return;
 559                                 }
 560                                 bp->timer_ticks = 0;
 561                                 restart_timer = 1;
 562                         } else {
 563                                 restart_timer = 1;
 564                         }
 565                 }
 566         } else {
 567                 /* Can't happens.... */
 568                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 569                        bp->dev->name);
 570                 restart_timer = 0;
 571                 bp->timer_ticks = 0;
 572                 bp->timer_state = asleep; /* foo on you */
 573         }
 574
 575         if (restart_timer != 0) {
 576                 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 577                 add_timer(&bp->bigmac_timer);
 578         }
 579 }
 580
 581 /* Well, really we just force the chip into 100baseT then
 582  * 10baseT, each time checking for a link status.
 583  */
 584 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
 585 {
 586         void __iomem *tregs = bp->tregs;
 587         int timeout;
 588
 589         /* Grab new software copies of PHY registers. */
 590         bp->sw_bmsr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 591         bp->sw_bmcr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 592
 593         /* Reset the PHY. */
 594         bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 595         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 596         bp->sw_bmcr     = (BMCR_RESET);
 597         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 598
 599         timeout = 64;
 600         while (--timeout) {
 601                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 602                 if ((bp->sw_bmcr & BMCR_RESET) == 0)
 603                         break;
 604                 udelay(20);
 605         }
 606         if (timeout == 0)
 607                 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 608
 609         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 610
 611         /* First we try 100baseT. */
 612         bp->sw_bmcr |= BMCR_SPEED100;
 613         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 614
 615         bp->timer_state = ltrywait;
 616         bp->timer_ticks = 0;
 617         bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
 618         bp->bigmac_timer.data = (unsigned long) bp;
 619         bp->bigmac_timer.function = &bigmac_timer;
 620         add_timer(&bp->bigmac_timer);
 621 }
 622
 623 static int bigmac_init(struct bigmac *bp, int from_irq)
 624 {
 625         void __iomem *gregs        = bp->gregs;
 626         void __iomem *cregs        = bp->creg;
 627         void __iomem *bregs        = bp->bregs;
 628         unsigned char *e = &bp->dev->dev_addr[0];
 629
 630         /* Latch current counters into statistics. */
 631         bigmac_get_counters(bp, bregs);
 632
 633         /* Reset QEC. */
 634         qec_global_reset(gregs);
 635
 636         /* Init QEC. */
 637         qec_init(bp);
 638
 639         /* Alloc and reset the tx/rx descriptor chains. */
 640         bigmac_init_rings(bp, from_irq);
 641
 642         /* Initialize the PHY. */
 643         bigmac_tcvr_init(bp);
 644
 645         /* Stop transmitter and receiver. */
 646         bigmac_stop(bp);
 647
 648         /* Set hardware ethernet address. */
 649         sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
 650         sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
 651         sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
 652
 653         /* Clear the hash table until mc upload occurs. */
 654         sbus_writel(0, bregs + BMAC_HTABLE3);
 655         sbus_writel(0, bregs + BMAC_HTABLE2);
 656         sbus_writel(0, bregs + BMAC_HTABLE1);
 657         sbus_writel(0, bregs + BMAC_HTABLE0);
 658
 659         /* Enable Big Mac hash table filter. */
 660         sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
 661                     bregs + BMAC_RXCFG);
 662         udelay(20);
 663
 664         /* Ok, configure the Big Mac transmitter. */
 665         sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
 666
 667         /* The HME docs recommend to use the 10LSB of our MAC here. */
 668         sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
 669                     bregs + BMAC_RSEED);
 670
 671         /* Enable the output drivers no matter what. */
 672         sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
 673                     bregs + BMAC_XIFCFG);
 674
 675         /* Tell the QEC where the ring descriptors are. */
 676         sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
 677                     cregs + CREG_RXDS);
 678         sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
 679                     cregs + CREG_TXDS);
 680
 681         /* Setup the FIFO pointers into QEC local memory. */
 682         sbus_writel(0, cregs + CREG_RXRBUFPTR);
 683         sbus_writel(0, cregs + CREG_RXWBUFPTR);
 684         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 685                     cregs + CREG_TXRBUFPTR);
 686         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 687                     cregs + CREG_TXWBUFPTR);
 688
 689         /* Tell bigmac what interrupts we don't want to hear about. */
 690         sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
 691                     bregs + BMAC_IMASK);
 692
 693         /* Enable the various other irq's. */
 694         sbus_writel(0, cregs + CREG_RIMASK);
 695         sbus_writel(0, cregs + CREG_TIMASK);
 696         sbus_writel(0, cregs + CREG_QMASK);
 697         sbus_writel(0, cregs + CREG_BMASK);
 698
 699         /* Set jam size to a reasonable default. */
 700         sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
 701
 702         /* Clear collision counter. */
 703         sbus_writel(0, cregs + CREG_CCNT);
 704
 705         /* Enable transmitter and receiver. */
 706         sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
 707                     bregs + BMAC_TXCFG);
 708         sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
 709                     bregs + BMAC_RXCFG);
 710
 711         /* Ok, start detecting link speed/duplex. */
 712         bigmac_begin_auto_negotiation(bp);
 713
 714         /* Success. */
 715         return 0;
 716 }
 717
 718 /* Error interrupts get sent here. */
 719 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
 720 {
 721         printk(KERN_ERR "bigmac_is_medium_rare: ");
 722         if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
 723                 if (qec_status & GLOB_STAT_ER)
 724                         printk("QEC_ERROR, ");
 725                 if (qec_status & GLOB_STAT_BM)
 726                         printk("QEC_BMAC_ERROR, ");
 727         }
 728         if (bmac_status & CREG_STAT_ERRORS) {
 729                 if (bmac_status & CREG_STAT_BERROR)
 730                         printk("BMAC_ERROR, ");
 731                 if (bmac_status & CREG_STAT_TXDERROR)
 732                         printk("TXD_ERROR, ");
 733                 if (bmac_status & CREG_STAT_TXLERR)
 734                         printk("TX_LATE_ERROR, ");
 735                 if (bmac_status & CREG_STAT_TXPERR)
 736                         printk("TX_PARITY_ERROR, ");
 737                 if (bmac_status & CREG_STAT_TXSERR)
 738                         printk("TX_SBUS_ERROR, ");
 739
 740                 if (bmac_status & CREG_STAT_RXDROP)
 741                         printk("RX_DROP_ERROR, ");
 742
 743                 if (bmac_status & CREG_STAT_RXSMALL)
 744                         printk("RX_SMALL_ERROR, ");
 745                 if (bmac_status & CREG_STAT_RXLERR)
 746                         printk("RX_LATE_ERROR, ");
 747                 if (bmac_status & CREG_STAT_RXPERR)
 748                         printk("RX_PARITY_ERROR, ");
 749                 if (bmac_status & CREG_STAT_RXSERR)
 750                         printk("RX_SBUS_ERROR, ");
 751         }
 752
 753         printk(" RESET\n");
 754         bigmac_init(bp, 1);
 755 }
 756
 757 /* BigMAC transmit complete service routines. */
 758 static void bigmac_tx(struct bigmac *bp)
 759 {
 760         struct be_txd *txbase = &bp->bmac_block->be_txd[0];
 761         struct net_device *dev = bp->dev;
 762         int elem;
 763
 764         spin_lock(&bp->lock);
 765
 766         elem = bp->tx_old;
 767         DTX(("bigmac_tx: tx_old[%d] ", elem));
 768         while (elem != bp->tx_new) {
 769                 struct sk_buff *skb;
 770                 struct be_txd *this = &txbase[elem];
 771
 772                 DTX(("this(%p) [flags(%08x)addr(%08x)]",
 773                      this, this->tx_flags, this->tx_addr));
 774
 775                 if (this->tx_flags & TXD_OWN)
 776                         break;
 777                 skb = bp->tx_skbs[elem];
 778                 bp->enet_stats.tx_packets++;
 779                 bp->enet_stats.tx_bytes += skb->len;
 780                 sbus_unmap_single(bp->bigmac_sdev,
 781                                   this->tx_addr, skb->len,
 782                                   SBUS_DMA_TODEVICE);
 783
 784                 DTX(("skb(%p) ", skb));
 785                 bp->tx_skbs[elem] = NULL;
 786                 dev_kfree_skb_irq(skb);
 787
 788                 elem = NEXT_TX(elem);
 789         }
 790         DTX((" DONE, tx_old=%d\n", elem));
 791         bp->tx_old = elem;
 792
 793         if (netif_queue_stopped(dev) &&
 794             TX_BUFFS_AVAIL(bp) > 0)
 795                 netif_wake_queue(bp->dev);
 796
 797         spin_unlock(&bp->lock);
 798 }
 799
 800 /* BigMAC receive complete service routines. */
 801 static void bigmac_rx(struct bigmac *bp)
 802 {
 803         struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
 804         struct be_rxd *this;
 805         int elem = bp->rx_new, drops = 0;
 806         u32 flags;
 807
 808         this = &rxbase[elem];
 809         while (!((flags = this->rx_flags) & RXD_OWN)) {
 810                 struct sk_buff *skb;
 811                 int len = (flags & RXD_LENGTH); /* FCS not included */
 812
 813                 /* Check for errors. */
 814                 if (len < ETH_ZLEN) {
 815                         bp->enet_stats.rx_errors++;
 816                         bp->enet_stats.rx_length_errors++;
 817
 818         drop_it:
 819                         /* Return it to the BigMAC. */
 820                         bp->enet_stats.rx_dropped++;
 821                         this->rx_flags =
 822                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 823                         goto next;
 824                 }
 825                 skb = bp->rx_skbs[elem];
 826                 if (len > RX_COPY_THRESHOLD) {
 827                         struct sk_buff *new_skb;
 828
 829                         /* Now refill the entry, if we can. */
 830                         new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 831                         if (new_skb == NULL) {
 832                                 drops++;
 833                                 goto drop_it;
 834                         }
 835                         sbus_unmap_single(bp->bigmac_sdev,
 836                                           this->rx_addr,
 837                                           RX_BUF_ALLOC_SIZE - 34,
 838                                           SBUS_DMA_FROMDEVICE);
 839                         bp->rx_skbs[elem] = new_skb;
 840                         new_skb->dev = bp->dev;
 841                         skb_put(new_skb, ETH_FRAME_LEN);
 842                         skb_reserve(new_skb, 34);
 843                         this->rx_addr = sbus_map_single(bp->bigmac_sdev,
 844                                                         new_skb->data,
 845                                                         RX_BUF_ALLOC_SIZE - 34,
 846                                                         SBUS_DMA_FROMDEVICE);
 847                         this->rx_flags =
 848                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 849
 850                         /* Trim the original skb for the netif. */
 851                         skb_trim(skb, len);
 852                 } else {
 853                         struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
 854
 855                         if (copy_skb == NULL) {
 856                                 drops++;
 857                                 goto drop_it;
 858                         }
 859                         copy_skb->dev = bp->dev;
 860                         skb_reserve(copy_skb, 2);
 861                         skb_put(copy_skb, len);
 862                         sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
 863                                                      this->rx_addr, len,
 864                                                      SBUS_DMA_FROMDEVICE);
 865                         eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
 866                         sbus_dma_sync_single_for_device(bp->bigmac_sdev,
 867                                                         this->rx_addr, len,
 868                                                         SBUS_DMA_FROMDEVICE);
 869
 870                         /* Reuse original ring buffer. */
 871                         this->rx_flags =
 872                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 873
 874                         skb = copy_skb;
 875                 }
 876
 877                 /* No checksums done by the BigMAC ;-( */
 878                 skb->protocol = eth_type_trans(skb, bp->dev);
 879                 netif_rx(skb);
 880                 bp->dev->last_rx = jiffies;
 881                 bp->enet_stats.rx_packets++;
 882                 bp->enet_stats.rx_bytes += len;
 883         next:
 884                 elem = NEXT_RX(elem);
 885                 this = &rxbase[elem];
 886         }
 887         bp->rx_new = elem;
 888         if (drops)
 889                 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
 890 }
 891
 892 static irqreturn_t bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 893 {
 894         struct bigmac *bp = (struct bigmac *) dev_id;
 895         u32 qec_status, bmac_status;
 896
 897         DIRQ(("bigmac_interrupt: "));
 898
 899         /* Latch status registers now. */
 900         bmac_status = sbus_readl(bp->creg + CREG_STAT);
 901         qec_status = sbus_readl(bp->gregs + GLOB_STAT);
 902
 903         DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
 904         if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
 905            (bmac_status & CREG_STAT_ERRORS))
 906                 bigmac_is_medium_rare(bp, qec_status, bmac_status);
 907
 908         if (bmac_status & CREG_STAT_TXIRQ)
 909                 bigmac_tx(bp);
 910
 911         if (bmac_status & CREG_STAT_RXIRQ)
 912                 bigmac_rx(bp);
 913
 914         return IRQ_HANDLED;
 915 }
 916
 917 static int bigmac_open(struct net_device *dev)
 918 {
 919         struct bigmac *bp = (struct bigmac *) dev->priv;
 920         int ret;
 921
 922         ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
 923         if (ret) {
 924                 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
 925                 return ret;
 926         }
 927         init_timer(&bp->bigmac_timer);
 928         ret = bigmac_init(bp, 0);
 929         if (ret)
 930                 free_irq(dev->irq, bp);
 931         return ret;
 932 }
 933
 934 static int bigmac_close(struct net_device *dev)
 935 {
 936         struct bigmac *bp = (struct bigmac *) dev->priv;
 937
 938         del_timer(&bp->bigmac_timer);
 939         bp->timer_state = asleep;
 940         bp->timer_ticks = 0;
 941
 942         bigmac_stop(bp);
 943         bigmac_clean_rings(bp);
 944         free_irq(dev->irq, bp);
 945         return 0;
 946 }
 947
 948 static void bigmac_tx_timeout(struct net_device *dev)
 949 {
 950         struct bigmac *bp = (struct bigmac *) dev->priv;
 951
 952         bigmac_init(bp, 0);
 953         netif_wake_queue(dev);
 954 }
 955
 956 /* Put a packet on the wire. */
 957 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 958 {
 959         struct bigmac *bp = (struct bigmac *) dev->priv;
 960         int len, entry;
 961         u32 mapping;
 962
 963         len = skb->len;
 964         mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
 965
 966         /* Avoid a race... */
 967         spin_lock_irq(&bp->lock);
 968         entry = bp->tx_new;
 969         DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
 970         bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
 971         bp->tx_skbs[entry] = skb;
 972         bp->bmac_block->be_txd[entry].tx_addr = mapping;
 973         bp->bmac_block->be_txd[entry].tx_flags =
 974                 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
 975         bp->tx_new = NEXT_TX(entry);
 976         if (TX_BUFFS_AVAIL(bp) <= 0)
 977                 netif_stop_queue(dev);
 978         spin_unlock_irq(&bp->lock);
 979
 980         /* Get it going. */
 981         sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
 982
 983
 984         dev->trans_start = jiffies;
 985
 986         return 0;
 987 }
 988
 989 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
 990 {
 991         struct bigmac *bp = (struct bigmac *) dev->priv;
 992
 993         bigmac_get_counters(bp, bp->bregs);
 994         return &bp->enet_stats;
 995 }
 996
 997 static void bigmac_set_multicast(struct net_device *dev)
 998 {
 999         struct bigmac *bp = (struct bigmac *) dev->priv;
1000         void __iomem *bregs = bp->bregs;
1001         struct dev_mc_list *dmi = dev->mc_list;
1002         char *addrs;
1003         int i;
1004         u32 tmp, crc;
1005
1006         /* Disable the receiver.  The bit self-clears when
1007          * the operation is complete.
1008          */
1009         tmp = sbus_readl(bregs + BMAC_RXCFG);
1010         tmp &= ~(BIGMAC_RXCFG_ENABLE);
1011         sbus_writel(tmp, bregs + BMAC_RXCFG);
1012         while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1013                 udelay(20);
1014
1015         if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1016                 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1017                 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1018                 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1019                 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1020         } else if (dev->flags & IFF_PROMISC) {
1021                 tmp = sbus_readl(bregs + BMAC_RXCFG);
1022                 tmp |= BIGMAC_RXCFG_PMISC;
1023                 sbus_writel(tmp, bregs + BMAC_RXCFG);
1024         } else {
1025                 u16 hash_table[4];
1026
1027                 for (i = 0; i < 4; i++)
1028                         hash_table[i] = 0;
1029
1030                 for (i = 0; i < dev->mc_count; i++) {
1031                         addrs = dmi->dmi_addr;
1032                         dmi = dmi->next;
1033
1034                         if (!(*addrs & 1))
1035                                 continue;
1036
1037                         crc = ether_crc_le(6, addrs);
1038                         crc >>= 26;
1039                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1040                 }
1041                 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1042                 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1043                 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1044                 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1045         }
1046
1047         /* Re-enable the receiver. */
1048         tmp = sbus_readl(bregs + BMAC_RXCFG);
1049         tmp |= BIGMAC_RXCFG_ENABLE;
1050         sbus_writel(tmp, bregs + BMAC_RXCFG);
1051 }
1052
1053 /* Ethtool support... */
1054 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1055 {
1056         struct bigmac *bp = dev->priv;
1057
1058         strcpy(info->driver, "sunbmac");
1059         strcpy(info->version, "2.0");
1060         sprintf(info->bus_info, "SBUS:%d",
1061                 bp->qec_sdev->slot);
1062 }
1063
1064 static u32 bigmac_get_link(struct net_device *dev)
1065 {
1066         struct bigmac *bp = dev->priv;
1067
1068         spin_lock_irq(&bp->lock);
1069         bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1070         spin_unlock_irq(&bp->lock);
1071
1072         return (bp->sw_bmsr & BMSR_LSTATUS);
1073 }
1074
1075 static struct ethtool_ops bigmac_ethtool_ops = {
1076         .get_drvinfo            = bigmac_get_drvinfo,
1077         .get_link               = bigmac_get_link,
1078 };
1079
1080 static int __init bigmac_ether_init(struct sbus_dev *qec_sdev)
1081 {
1082         struct net_device *dev;
1083         static int version_printed;
1084         struct bigmac *bp;
1085         u8 bsizes, bsizes_more;
1086         int i;
1087
1088         /* Get a new device struct for this interface. */
1089         dev = alloc_etherdev(sizeof(struct bigmac));
1090         if (!dev)
1091                 return -ENOMEM;
1092         SET_MODULE_OWNER(dev);
1093
1094         if (version_printed++ == 0)
1095                 printk(KERN_INFO "%s", version);
1096
1097         dev->base_addr = (long) qec_sdev;
1098         for (i = 0; i < 6; i++)
1099                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1100
1101         /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1102         bp = dev->priv;
1103         bp->qec_sdev = qec_sdev;
1104         bp->bigmac_sdev = qec_sdev->child;
1105
1106         spin_lock_init(&bp->lock);
1107
1108         /* Verify the registers we expect, are actually there. */
1109         if ((bp->bigmac_sdev->num_registers != 3) ||
1110            (bp->qec_sdev->num_registers != 2)) {
1111                 printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.\n",
1112                        bp->qec_sdev->num_registers,
1113                        bp->bigmac_sdev->num_registers);
1114                 printk(KERN_ERR "BIGMAC: Would you like that for here or to go?\n");
1115                 goto fail_and_cleanup;
1116         }
1117
1118         /* Map in QEC global control registers. */
1119         bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
1120                                  GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1121         if (!bp->gregs) {
1122                 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1123                 goto fail_and_cleanup;
1124         }
1125
1126         /* Make sure QEC is in BigMAC mode. */
1127         if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1128                 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1129                 goto fail_and_cleanup;
1130         }
1131
1132         /* Reset the QEC. */
1133         if (qec_global_reset(bp->gregs))
1134                 goto fail_and_cleanup;
1135
1136         /* Get supported SBUS burst sizes. */
1137         bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
1138                                     "burst-sizes",
1139                                     0xff);
1140
1141         bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
1142                                          "burst-sizes",
1143                                          0xff);
1144
1145         bsizes &= 0xff;
1146         if (bsizes_more != 0xff)
1147                 bsizes &= bsizes_more;
1148         if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1149             (bsizes & DMA_BURST32) == 0)
1150                 bsizes = (DMA_BURST32 - 1);
1151         bp->bigmac_bursts = bsizes;
1152
1153         /* Perform QEC initialization. */
1154         qec_init(bp);
1155
1156         /* Map in the BigMAC channel registers. */
1157         bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
1158                                 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1159         if (!bp->creg) {
1160                 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1161                 goto fail_and_cleanup;
1162         }
1163
1164         /* Map in the BigMAC control registers. */
1165         bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
1166                                  BMAC_REG_SIZE, "BigMAC Primary Regs");
1167         if (!bp->bregs) {
1168                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1169                 goto fail_and_cleanup;
1170         }
1171
1172         /* Map in the BigMAC transceiver registers, this is how you poke at
1173          * the BigMAC's PHY.
1174          */
1175         bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
1176                                  TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1177         if (!bp->tregs) {
1178                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1179                 goto fail_and_cleanup;
1180         }
1181
1182         /* Stop the BigMAC. */
1183         bigmac_stop(bp);
1184
1185         /* Allocate transmit/receive descriptor DVMA block. */
1186         bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
1187                                                PAGE_SIZE,
1188                                                &bp->bblock_dvma);
1189         if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1190                 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1191                 goto fail_and_cleanup;
1192         }
1193
1194         /* Get the board revision of this BigMAC. */
1195         bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
1196                                            "board-version", 1);
1197
1198         /* Init auto-negotiation timer state. */
1199         init_timer(&bp->bigmac_timer);
1200         bp->timer_state = asleep;
1201         bp->timer_ticks = 0;
1202
1203         /* Backlink to generic net device struct. */
1204         bp->dev = dev;
1205
1206         /* Set links to our BigMAC open and close routines. */
1207         dev->open = &bigmac_open;
1208         dev->stop = &bigmac_close;
1209         dev->hard_start_xmit = &bigmac_start_xmit;
1210         dev->ethtool_ops = &bigmac_ethtool_ops;
1211
1212         /* Set links to BigMAC statistic and multi-cast loading code. */
1213         dev->get_stats = &bigmac_get_stats;
1214         dev->set_multicast_list = &bigmac_set_multicast;
1215
1216         dev->tx_timeout = &bigmac_tx_timeout;
1217         dev->watchdog_timeo = 5*HZ;
1218
1219         /* Finish net device registration. */
1220         dev->irq = bp->bigmac_sdev->irqs[0];
1221         dev->dma = 0;
1222
1223         if (register_netdev(dev)) {
1224                 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1225                 goto fail_and_cleanup;
1226         }
1227
1228         /* Put us into the list of instances attached for later driver
1229          * exit.
1230          */
1231         bp->next_module = root_bigmac_dev;
1232         root_bigmac_dev = bp;
1233
1234         printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
1235         for (i = 0; i < 6; i++)
1236                 printk("%2.2x%c", dev->dev_addr[i],
1237                        i == 5 ? ' ' : ':');
1238         printk("\n");
1239
1240         return 0;
1241
1242 fail_and_cleanup:
1243         /* Something went wrong, undo whatever we did so far. */
1244         /* Free register mappings if any. */
1245         if (bp->gregs)
1246                 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1247         if (bp->creg)
1248                 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1249         if (bp->bregs)
1250                 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1251         if (bp->tregs)
1252                 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1253
1254         if (bp->bmac_block)
1255                 sbus_free_consistent(bp->bigmac_sdev,
1256                                      PAGE_SIZE,
1257                                      bp->bmac_block,
1258                                      bp->bblock_dvma);
1259
1260         /* This also frees the co-located 'dev->priv' */
1261         free_netdev(dev);
1262         return -ENODEV;
1263 }
1264
1265 /* QEC can be the parent of either QuadEthernet or
1266  * a BigMAC.  We want the latter.
1267  */
1268 static int __init bigmac_match(struct sbus_dev *sdev)
1269 {
1270         struct sbus_dev *child = sdev->child;
1271
1272         if (strcmp(sdev->prom_name, "qec") != 0)
1273                 return 0;
1274
1275         if (child == NULL)
1276                 return 0;
1277
1278         if (strcmp(child->prom_name, "be") != 0)
1279                 return 0;
1280
1281         return 1;
1282 }
1283
1284 static int __init bigmac_probe(void)
1285 {
1286         struct sbus_bus *sbus;
1287         struct sbus_dev *sdev = NULL;
1288         static int called;
1289         int cards = 0, v;
1290
1291         root_bigmac_dev = NULL;
1292
1293         if (called)
1294                 return -ENODEV;
1295         called++;
1296
1297         for_each_sbus(sbus) {
1298                 for_each_sbusdev(sdev, sbus) {
1299                         if (bigmac_match(sdev)) {
1300                                 cards++;
1301                                 if ((v = bigmac_ether_init(sdev)))
1302                                         return v;
1303                         }
1304                 }
1305         }
1306         if (!cards)
1307                 return -ENODEV;
1308         return 0;
1309 }
1310
1311 static void __exit bigmac_cleanup(void)
1312 {
1313         while (root_bigmac_dev) {
1314                 struct bigmac *bp = root_bigmac_dev;
1315                 struct bigmac *bp_nxt = root_bigmac_dev->next_module;
1316
1317                 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1318                 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1319                 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1320                 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1321                 sbus_free_consistent(bp->bigmac_sdev,
1322                                      PAGE_SIZE,
1323                                      bp->bmac_block,
1324                                      bp->bblock_dvma);
1325
1326                 unregister_netdev(bp->dev);
1327                 free_netdev(bp->dev);
1328                 root_bigmac_dev = bp_nxt;
1329         }
1330 }
1331
1332 module_init(bigmac_probe);
1333 module_exit(bigmac_cleanup);