drivers/net/sunbmac.c

   1 /* sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
   2  *
   3  * Copyright (C) 1997, 1998, 1999, 2003, 2008 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #include <linux/module.h>
   7
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/fcntl.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/ioport.h>
  13 #include <linux/in.h>
  14 #include <linux/string.h>
  15 #include <linux/delay.h>
  16 #include <linux/init.h>
  17 #include <linux/crc32.h>
  18 #include <linux/errno.h>
  19 #include <linux/ethtool.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/bitops.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/of.h>
  26 #include <linux/of_device.h>
  27 #include <linux/gfp.h>
  28
  29 #include <asm/auxio.h>
  30 #include <asm/byteorder.h>
  31 #include <asm/dma.h>
  32 #include <asm/idprom.h>
  33 #include <asm/io.h>
  34 #include <asm/openprom.h>
  35 #include <asm/oplib.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/system.h>
  38
  39 #include "sunbmac.h"
  40
  41 #define DRV_NAME        "sunbmac"
  42 #define DRV_VERSION     "2.1"
  43 #define DRV_RELDATE     "August 26, 2008"
  44 #define DRV_AUTHOR      "David S. Miller (davem@davemloft.net)"
  45
  46 static char version[] =
  47         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
  48
  49 MODULE_VERSION(DRV_VERSION);
  50 MODULE_AUTHOR(DRV_AUTHOR);
  51 MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
  52 MODULE_LICENSE("GPL");
  53
  54 #undef DEBUG_PROBE
  55 #undef DEBUG_TX
  56 #undef DEBUG_IRQ
  57
  58 #ifdef DEBUG_PROBE
  59 #define DP(x)  printk x
  60 #else
  61 #define DP(x)
  62 #endif
  63
  64 #ifdef DEBUG_TX
  65 #define DTX(x)  printk x
  66 #else
  67 #define DTX(x)
  68 #endif
  69
  70 #ifdef DEBUG_IRQ
  71 #define DIRQ(x)  printk x
  72 #else
  73 #define DIRQ(x)
  74 #endif
  75
  76 #define DEFAULT_JAMSIZE    4 /* Toe jam */
  77
  78 #define QEC_RESET_TRIES 200
  79
  80 static int qec_global_reset(void __iomem *gregs)
  81 {
  82         int tries = QEC_RESET_TRIES;
  83
  84         sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
  85         while (--tries) {
  86                 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
  87                         udelay(20);
  88                         continue;
  89                 }
  90                 break;
  91         }
  92         if (tries)
  93                 return 0;
  94         printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
  95         return -1;
  96 }
  97
  98 static void qec_init(struct bigmac *bp)
  99 {
 100         struct platform_device *qec_op = bp->qec_op;
 101         void __iomem *gregs = bp->gregs;
 102         u8 bsizes = bp->bigmac_bursts;
 103         u32 regval;
 104
 105         /* 64byte bursts do not work at the moment, do
 106          * not even try to enable them.  -DaveM
 107          */
 108         if (bsizes & DMA_BURST32)
 109                 regval = GLOB_CTRL_B32;
 110         else
 111                 regval = GLOB_CTRL_B16;
 112         sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
 113         sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
 114
 115         /* All of memsize is given to bigmac. */
 116         sbus_writel(resource_size(&qec_op->resource[1]),
 117                     gregs + GLOB_MSIZE);
 118
 119         /* Half to the transmitter, half to the receiver. */
 120         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 121                     gregs + GLOB_TSIZE);
 122         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 123                     gregs + GLOB_RSIZE);
 124 }
 125
 126 #define TX_RESET_TRIES     32
 127 #define RX_RESET_TRIES     32
 128
 129 static void bigmac_tx_reset(void __iomem *bregs)
 130 {
 131         int tries = TX_RESET_TRIES;
 132
 133         sbus_writel(0, bregs + BMAC_TXCFG);
 134
 135         /* The fifo threshold bit is read-only and does
 136          * not clear.  -DaveM
 137          */
 138         while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
 139                --tries != 0)
 140                 udelay(20);
 141
 142         if (!tries) {
 143                 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
 144                 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
 145                        sbus_readl(bregs + BMAC_TXCFG));
 146         }
 147 }
 148
 149 static void bigmac_rx_reset(void __iomem *bregs)
 150 {
 151         int tries = RX_RESET_TRIES;
 152
 153         sbus_writel(0, bregs + BMAC_RXCFG);
 154         while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
 155                 udelay(20);
 156
 157         if (!tries) {
 158                 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
 159                 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
 160                        sbus_readl(bregs + BMAC_RXCFG));
 161         }
 162 }
 163
 164 /* Reset the transmitter and receiver. */
 165 static void bigmac_stop(struct bigmac *bp)
 166 {
 167         bigmac_tx_reset(bp->bregs);
 168         bigmac_rx_reset(bp->bregs);
 169 }
 170
 171 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
 172 {
 173         struct net_device_stats *stats = &bp->enet_stats;
 174
 175         stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
 176         sbus_writel(0, bregs + BMAC_RCRCECTR);
 177
 178         stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
 179         sbus_writel(0, bregs + BMAC_UNALECTR);
 180
 181         stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
 182         sbus_writel(0, bregs + BMAC_GLECTR);
 183
 184         stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
 185
 186         stats->collisions +=
 187                 (sbus_readl(bregs + BMAC_EXCTR) +
 188                  sbus_readl(bregs + BMAC_LTCTR));
 189         sbus_writel(0, bregs + BMAC_EXCTR);
 190         sbus_writel(0, bregs + BMAC_LTCTR);
 191 }
 192
 193 static void bigmac_clean_rings(struct bigmac *bp)
 194 {
 195         int i;
 196
 197         for (i = 0; i < RX_RING_SIZE; i++) {
 198                 if (bp->rx_skbs[i] != NULL) {
 199                         dev_kfree_skb_any(bp->rx_skbs[i]);
 200                         bp->rx_skbs[i] = NULL;
 201                 }
 202         }
 203
 204         for (i = 0; i < TX_RING_SIZE; i++) {
 205                 if (bp->tx_skbs[i] != NULL) {
 206                         dev_kfree_skb_any(bp->tx_skbs[i]);
 207                         bp->tx_skbs[i] = NULL;
 208                 }
 209         }
 210 }
 211
 212 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
 213 {
 214         struct bmac_init_block *bb = bp->bmac_block;
 215         struct net_device *dev = bp->dev;
 216         int i;
 217         gfp_t 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                         dma_map_single(&bp->bigmac_op->dev,
 244                                        skb->data,
 245                                        RX_BUF_ALLOC_SIZE - 34,
 246                                        DMA_FROM_DEVICE);
 247                 bb->be_rxd[i].rx_flags =
 248                         (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 249         }
 250
 251         for (i = 0; i < TX_RING_SIZE; i++)
 252                 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
 253 }
 254
 255 #define MGMT_CLKON  (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
 256 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
 257
 258 static void idle_transceiver(void __iomem *tregs)
 259 {
 260         int i = 20;
 261
 262         while (i--) {
 263                 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
 264                 sbus_readl(tregs + TCVR_MPAL);
 265                 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
 266                 sbus_readl(tregs + TCVR_MPAL);
 267         }
 268 }
 269
 270 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
 271 {
 272         if (bp->tcvr_type == internal) {
 273                 bit = (bit & 1) << 3;
 274                 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
 275                             tregs + TCVR_MPAL);
 276                 sbus_readl(tregs + TCVR_MPAL);
 277                 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 278                             tregs + TCVR_MPAL);
 279                 sbus_readl(tregs + TCVR_MPAL);
 280         } else if (bp->tcvr_type == external) {
 281                 bit = (bit & 1) << 2;
 282                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
 283                             tregs + TCVR_MPAL);
 284                 sbus_readl(tregs + TCVR_MPAL);
 285                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
 286                             tregs + TCVR_MPAL);
 287                 sbus_readl(tregs + TCVR_MPAL);
 288         } else {
 289                 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
 290         }
 291 }
 292
 293 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
 294 {
 295         int retval = 0;
 296
 297         if (bp->tcvr_type == internal) {
 298                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 299                 sbus_readl(tregs + TCVR_MPAL);
 300                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 301                             tregs + TCVR_MPAL);
 302                 sbus_readl(tregs + TCVR_MPAL);
 303                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 304         } else if (bp->tcvr_type == external) {
 305                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 306                 sbus_readl(tregs + TCVR_MPAL);
 307                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 308                 sbus_readl(tregs + TCVR_MPAL);
 309                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 310         } else {
 311                 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
 312         }
 313         return retval;
 314 }
 315
 316 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
 317 {
 318         int retval = 0;
 319
 320         if (bp->tcvr_type == internal) {
 321                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 322                 sbus_readl(tregs + TCVR_MPAL);
 323                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 324                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 325                 sbus_readl(tregs + TCVR_MPAL);
 326         } else if (bp->tcvr_type == external) {
 327                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 328                 sbus_readl(tregs + TCVR_MPAL);
 329                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 330                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 331                 sbus_readl(tregs + TCVR_MPAL);
 332         } else {
 333                 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
 334         }
 335         return retval;
 336 }
 337
 338 static void put_tcvr_byte(struct bigmac *bp,
 339                           void __iomem *tregs,
 340                           unsigned int byte)
 341 {
 342         int shift = 4;
 343
 344         do {
 345                 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
 346                 shift -= 1;
 347         } while (shift >= 0);
 348 }
 349
 350 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
 351                               int reg, unsigned short val)
 352 {
 353         int shift;
 354
 355         reg &= 0xff;
 356         val &= 0xffff;
 357         switch(bp->tcvr_type) {
 358         case internal:
 359         case external:
 360                 break;
 361
 362         default:
 363                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 364                 return;
 365         }
 366
 367         idle_transceiver(tregs);
 368         write_tcvr_bit(bp, tregs, 0);
 369         write_tcvr_bit(bp, tregs, 1);
 370         write_tcvr_bit(bp, tregs, 0);
 371         write_tcvr_bit(bp, tregs, 1);
 372
 373         put_tcvr_byte(bp, tregs,
 374                       ((bp->tcvr_type == internal) ?
 375                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 376
 377         put_tcvr_byte(bp, tregs, reg);
 378
 379         write_tcvr_bit(bp, tregs, 1);
 380         write_tcvr_bit(bp, tregs, 0);
 381
 382         shift = 15;
 383         do {
 384                 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
 385                 shift -= 1;
 386         } while (shift >= 0);
 387 }
 388
 389 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
 390                                        void __iomem *tregs,
 391                                        int reg)
 392 {
 393         unsigned short retval = 0;
 394
 395         reg &= 0xff;
 396         switch(bp->tcvr_type) {
 397         case internal:
 398         case external:
 399                 break;
 400
 401         default:
 402                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 403                 return 0xffff;
 404         }
 405
 406         idle_transceiver(tregs);
 407         write_tcvr_bit(bp, tregs, 0);
 408         write_tcvr_bit(bp, tregs, 1);
 409         write_tcvr_bit(bp, tregs, 1);
 410         write_tcvr_bit(bp, tregs, 0);
 411
 412         put_tcvr_byte(bp, tregs,
 413                       ((bp->tcvr_type == internal) ?
 414                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 415
 416         put_tcvr_byte(bp, tregs, reg);
 417
 418         if (bp->tcvr_type == external) {
 419                 int shift = 15;
 420
 421                 (void) read_tcvr_bit2(bp, tregs);
 422                 (void) read_tcvr_bit2(bp, tregs);
 423
 424                 do {
 425                         int tmp;
 426
 427                         tmp = read_tcvr_bit2(bp, tregs);
 428                         retval |= ((tmp & 1) << shift);
 429                         shift -= 1;
 430                 } while (shift >= 0);
 431
 432                 (void) read_tcvr_bit2(bp, tregs);
 433                 (void) read_tcvr_bit2(bp, tregs);
 434                 (void) read_tcvr_bit2(bp, tregs);
 435         } else {
 436                 int shift = 15;
 437
 438                 (void) read_tcvr_bit(bp, tregs);
 439                 (void) read_tcvr_bit(bp, tregs);
 440
 441                 do {
 442                         int tmp;
 443
 444                         tmp = read_tcvr_bit(bp, tregs);
 445                         retval |= ((tmp & 1) << shift);
 446                         shift -= 1;
 447                 } while (shift >= 0);
 448
 449                 (void) read_tcvr_bit(bp, tregs);
 450                 (void) read_tcvr_bit(bp, tregs);
 451                 (void) read_tcvr_bit(bp, tregs);
 452         }
 453         return retval;
 454 }
 455
 456 static void bigmac_tcvr_init(struct bigmac *bp)
 457 {
 458         void __iomem *tregs = bp->tregs;
 459         u32 mpal;
 460
 461         idle_transceiver(tregs);
 462         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 463                     tregs + TCVR_MPAL);
 464         sbus_readl(tregs + TCVR_MPAL);
 465
 466         /* Only the bit for the present transceiver (internal or
 467          * external) will stick, set them both and see what stays.
 468          */
 469         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 470         sbus_readl(tregs + TCVR_MPAL);
 471         udelay(20);
 472
 473         mpal = sbus_readl(tregs + TCVR_MPAL);
 474         if (mpal & MGMT_PAL_EXT_MDIO) {
 475                 bp->tcvr_type = external;
 476                 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 477                             tregs + TCVR_TPAL);
 478                 sbus_readl(tregs + TCVR_TPAL);
 479         } else if (mpal & MGMT_PAL_INT_MDIO) {
 480                 bp->tcvr_type = internal;
 481                 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
 482                               TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 483                             tregs + TCVR_TPAL);
 484                 sbus_readl(tregs + TCVR_TPAL);
 485         } else {
 486                 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
 487                        "external MDIO available!\n");
 488                 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
 489                        sbus_readl(tregs + TCVR_MPAL),
 490                        sbus_readl(tregs + TCVR_TPAL));
 491         }
 492 }
 493
 494 static int bigmac_init_hw(struct bigmac *, int);
 495
 496 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
 497 {
 498         if (bp->sw_bmcr & BMCR_SPEED100) {
 499                 int timeout;
 500
 501                 /* Reset the PHY. */
 502                 bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 503                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 504                 bp->sw_bmcr     = (BMCR_RESET);
 505                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 506
 507                 timeout = 64;
 508                 while (--timeout) {
 509                         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 510                         if ((bp->sw_bmcr & BMCR_RESET) == 0)
 511                                 break;
 512                         udelay(20);
 513                 }
 514                 if (timeout == 0)
 515                         printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 516
 517                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 518
 519                 /* Now we try 10baseT. */
 520                 bp->sw_bmcr &= ~(BMCR_SPEED100);
 521                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 522                 return 0;
 523         }
 524
 525         /* We've tried them all. */
 526         return -1;
 527 }
 528
 529 static void bigmac_timer(unsigned long data)
 530 {
 531         struct bigmac *bp = (struct bigmac *) data;
 532         void __iomem *tregs = bp->tregs;
 533         int restart_timer = 0;
 534
 535         bp->timer_ticks++;
 536         if (bp->timer_state == ltrywait) {
 537                 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 538                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 539                 if (bp->sw_bmsr & BMSR_LSTATUS) {
 540                         printk(KERN_INFO "%s: Link is now up at %s.\n",
 541                                bp->dev->name,
 542                                (bp->sw_bmcr & BMCR_SPEED100) ?
 543                                "100baseT" : "10baseT");
 544                         bp->timer_state = asleep;
 545                         restart_timer = 0;
 546                 } else {
 547                         if (bp->timer_ticks >= 4) {
 548                                 int ret;
 549
 550                                 ret = try_next_permutation(bp, tregs);
 551                                 if (ret == -1) {
 552                                         printk(KERN_ERR "%s: Link down, cable problem?\n",
 553                                                bp->dev->name);
 554                                         ret = bigmac_init_hw(bp, 0);
 555                                         if (ret) {
 556                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 557                                                        "BigMAC.\n", bp->dev->name);
 558                                         }
 559                                         return;
 560                                 }
 561                                 bp->timer_ticks = 0;
 562                                 restart_timer = 1;
 563                         } else {
 564                                 restart_timer = 1;
 565                         }
 566                 }
 567         } else {
 568                 /* Can't happens.... */
 569                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 570                        bp->dev->name);
 571                 restart_timer = 0;
 572                 bp->timer_ticks = 0;
 573                 bp->timer_state = asleep; /* foo on you */
 574         }
 575
 576         if (restart_timer != 0) {
 577                 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 578                 add_timer(&bp->bigmac_timer);
 579         }
 580 }
 581
 582 /* Well, really we just force the chip into 100baseT then
 583  * 10baseT, each time checking for a link status.
 584  */
 585 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
 586 {
 587         void __iomem *tregs = bp->tregs;
 588         int timeout;
 589
 590         /* Grab new software copies of PHY registers. */
 591         bp->sw_bmsr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 592         bp->sw_bmcr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 593
 594         /* Reset the PHY. */
 595         bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 596         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 597         bp->sw_bmcr     = (BMCR_RESET);
 598         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 599
 600         timeout = 64;
 601         while (--timeout) {
 602                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 603                 if ((bp->sw_bmcr & BMCR_RESET) == 0)
 604                         break;
 605                 udelay(20);
 606         }
 607         if (timeout == 0)
 608                 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 609
 610         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 611
 612         /* First we try 100baseT. */
 613         bp->sw_bmcr |= BMCR_SPEED100;
 614         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 615
 616         bp->timer_state = ltrywait;
 617         bp->timer_ticks = 0;
 618         bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
 619         bp->bigmac_timer.data = (unsigned long) bp;
 620         bp->bigmac_timer.function = bigmac_timer;
 621         add_timer(&bp->bigmac_timer);
 622 }
 623
 624 static int bigmac_init_hw(struct bigmac *bp, int from_irq)
 625 {
 626         void __iomem *gregs        = bp->gregs;
 627         void __iomem *cregs        = bp->creg;
 628         void __iomem *bregs        = bp->bregs;
 629         unsigned char *e = &bp->dev->dev_addr[0];
 630
 631         /* Latch current counters into statistics. */
 632         bigmac_get_counters(bp, bregs);
 633
 634         /* Reset QEC. */
 635         qec_global_reset(gregs);
 636
 637         /* Init QEC. */
 638         qec_init(bp);
 639
 640         /* Alloc and reset the tx/rx descriptor chains. */
 641         bigmac_init_rings(bp, from_irq);
 642
 643         /* Initialize the PHY. */
 644         bigmac_tcvr_init(bp);
 645
 646         /* Stop transmitter and receiver. */
 647         bigmac_stop(bp);
 648
 649         /* Set hardware ethernet address. */
 650         sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
 651         sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
 652         sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
 653
 654         /* Clear the hash table until mc upload occurs. */
 655         sbus_writel(0, bregs + BMAC_HTABLE3);
 656         sbus_writel(0, bregs + BMAC_HTABLE2);
 657         sbus_writel(0, bregs + BMAC_HTABLE1);
 658         sbus_writel(0, bregs + BMAC_HTABLE0);
 659
 660         /* Enable Big Mac hash table filter. */
 661         sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
 662                     bregs + BMAC_RXCFG);
 663         udelay(20);
 664
 665         /* Ok, configure the Big Mac transmitter. */
 666         sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
 667
 668         /* The HME docs recommend to use the 10LSB of our MAC here. */
 669         sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
 670                     bregs + BMAC_RSEED);
 671
 672         /* Enable the output drivers no matter what. */
 673         sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
 674                     bregs + BMAC_XIFCFG);
 675
 676         /* Tell the QEC where the ring descriptors are. */
 677         sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
 678                     cregs + CREG_RXDS);
 679         sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
 680                     cregs + CREG_TXDS);
 681
 682         /* Setup the FIFO pointers into QEC local memory. */
 683         sbus_writel(0, cregs + CREG_RXRBUFPTR);
 684         sbus_writel(0, cregs + CREG_RXWBUFPTR);
 685         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 686                     cregs + CREG_TXRBUFPTR);
 687         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 688                     cregs + CREG_TXWBUFPTR);
 689
 690         /* Tell bigmac what interrupts we don't want to hear about. */
 691         sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
 692                     bregs + BMAC_IMASK);
 693
 694         /* Enable the various other irq's. */
 695         sbus_writel(0, cregs + CREG_RIMASK);
 696         sbus_writel(0, cregs + CREG_TIMASK);
 697         sbus_writel(0, cregs + CREG_QMASK);
 698         sbus_writel(0, cregs + CREG_BMASK);
 699
 700         /* Set jam size to a reasonable default. */
 701         sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
 702
 703         /* Clear collision counter. */
 704         sbus_writel(0, cregs + CREG_CCNT);
 705
 706         /* Enable transmitter and receiver. */
 707         sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
 708                     bregs + BMAC_TXCFG);
 709         sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
 710                     bregs + BMAC_RXCFG);
 711
 712         /* Ok, start detecting link speed/duplex. */
 713         bigmac_begin_auto_negotiation(bp);
 714
 715         /* Success. */
 716         return 0;
 717 }
 718
 719 /* Error interrupts get sent here. */
 720 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
 721 {
 722         printk(KERN_ERR "bigmac_is_medium_rare: ");
 723         if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
 724                 if (qec_status & GLOB_STAT_ER)
 725                         printk("QEC_ERROR, ");
 726                 if (qec_status & GLOB_STAT_BM)
 727                         printk("QEC_BMAC_ERROR, ");
 728         }
 729         if (bmac_status & CREG_STAT_ERRORS) {
 730                 if (bmac_status & CREG_STAT_BERROR)
 731                         printk("BMAC_ERROR, ");
 732                 if (bmac_status & CREG_STAT_TXDERROR)
 733                         printk("TXD_ERROR, ");
 734                 if (bmac_status & CREG_STAT_TXLERR)
 735                         printk("TX_LATE_ERROR, ");
 736                 if (bmac_status & CREG_STAT_TXPERR)
 737                         printk("TX_PARITY_ERROR, ");
 738                 if (bmac_status & CREG_STAT_TXSERR)
 739                         printk("TX_SBUS_ERROR, ");
 740
 741                 if (bmac_status & CREG_STAT_RXDROP)
 742                         printk("RX_DROP_ERROR, ");
 743
 744                 if (bmac_status & CREG_STAT_RXSMALL)
 745                         printk("RX_SMALL_ERROR, ");
 746                 if (bmac_status & CREG_STAT_RXLERR)
 747                         printk("RX_LATE_ERROR, ");
 748                 if (bmac_status & CREG_STAT_RXPERR)
 749                         printk("RX_PARITY_ERROR, ");
 750                 if (bmac_status & CREG_STAT_RXSERR)
 751                         printk("RX_SBUS_ERROR, ");
 752         }
 753
 754         printk(" RESET\n");
 755         bigmac_init_hw(bp, 1);
 756 }
 757
 758 /* BigMAC transmit complete service routines. */
 759 static void bigmac_tx(struct bigmac *bp)
 760 {
 761         struct be_txd *txbase = &bp->bmac_block->be_txd[0];
 762         struct net_device *dev = bp->dev;
 763         int elem;
 764
 765         spin_lock(&bp->lock);
 766
 767         elem = bp->tx_old;
 768         DTX(("bigmac_tx: tx_old[%d] ", elem));
 769         while (elem != bp->tx_new) {
 770                 struct sk_buff *skb;
 771                 struct be_txd *this = &txbase[elem];
 772
 773                 DTX(("this(%p) [flags(%08x)addr(%08x)]",
 774                      this, this->tx_flags, this->tx_addr));
 775
 776                 if (this->tx_flags & TXD_OWN)
 777                         break;
 778                 skb = bp->tx_skbs[elem];
 779                 bp->enet_stats.tx_packets++;
 780                 bp->enet_stats.tx_bytes += skb->len;
 781                 dma_unmap_single(&bp->bigmac_op->dev,
 782                                  this->tx_addr, skb->len,
 783                                  DMA_TO_DEVICE);
 784
 785                 DTX(("skb(%p) ", skb));
 786                 bp->tx_skbs[elem] = NULL;
 787                 dev_kfree_skb_irq(skb);
 788
 789                 elem = NEXT_TX(elem);
 790         }
 791         DTX((" DONE, tx_old=%d\n", elem));
 792         bp->tx_old = elem;
 793
 794         if (netif_queue_stopped(dev) &&
 795             TX_BUFFS_AVAIL(bp) > 0)
 796                 netif_wake_queue(bp->dev);
 797
 798         spin_unlock(&bp->lock);
 799 }
 800
 801 /* BigMAC receive complete service routines. */
 802 static void bigmac_rx(struct bigmac *bp)
 803 {
 804         struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
 805         struct be_rxd *this;
 806         int elem = bp->rx_new, drops = 0;
 807         u32 flags;
 808
 809         this = &rxbase[elem];
 810         while (!((flags = this->rx_flags) & RXD_OWN)) {
 811                 struct sk_buff *skb;
 812                 int len = (flags & RXD_LENGTH); /* FCS not included */
 813
 814                 /* Check for errors. */
 815                 if (len < ETH_ZLEN) {
 816                         bp->enet_stats.rx_errors++;
 817                         bp->enet_stats.rx_length_errors++;
 818
 819         drop_it:
 820                         /* Return it to the BigMAC. */
 821                         bp->enet_stats.rx_dropped++;
 822                         this->rx_flags =
 823                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 824                         goto next;
 825                 }
 826                 skb = bp->rx_skbs[elem];
 827                 if (len > RX_COPY_THRESHOLD) {
 828                         struct sk_buff *new_skb;
 829
 830                         /* Now refill the entry, if we can. */
 831                         new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 832                         if (new_skb == NULL) {
 833                                 drops++;
 834                                 goto drop_it;
 835                         }
 836                         dma_unmap_single(&bp->bigmac_op->dev,
 837                                          this->rx_addr,
 838                                          RX_BUF_ALLOC_SIZE - 34,
 839                                          DMA_FROM_DEVICE);
 840                         bp->rx_skbs[elem] = new_skb;
 841                         new_skb->dev = bp->dev;
 842                         skb_put(new_skb, ETH_FRAME_LEN);
 843                         skb_reserve(new_skb, 34);
 844                         this->rx_addr =
 845                                 dma_map_single(&bp->bigmac_op->dev,
 846                                                new_skb->data,
 847                                                RX_BUF_ALLOC_SIZE - 34,
 848                                                DMA_FROM_DEVICE);
 849                         this->rx_flags =
 850                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 851
 852                         /* Trim the original skb for the netif. */
 853                         skb_trim(skb, len);
 854                 } else {
 855                         struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
 856
 857                         if (copy_skb == NULL) {
 858                                 drops++;
 859                                 goto drop_it;
 860                         }
 861                         skb_reserve(copy_skb, 2);
 862                         skb_put(copy_skb, len);
 863                         dma_sync_single_for_cpu(&bp->bigmac_op->dev,
 864                                                 this->rx_addr, len,
 865                                                 DMA_FROM_DEVICE);
 866                         skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len);
 867                         dma_sync_single_for_device(&bp->bigmac_op->dev,
 868                                                    this->rx_addr, len,
 869                                                    DMA_FROM_DEVICE);
 870
 871                         /* Reuse original ring buffer. */
 872                         this->rx_flags =
 873                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 874
 875                         skb = copy_skb;
 876                 }
 877
 878                 /* No checksums done by the BigMAC ;-( */
 879                 skb->protocol = eth_type_trans(skb, bp->dev);
 880                 netif_rx(skb);
 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)
 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 = netdev_priv(dev);
 920         int ret;
 921
 922         ret = request_irq(dev->irq, bigmac_interrupt, IRQF_SHARED, 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_hw(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 = netdev_priv(dev);
 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 = netdev_priv(dev);
 951
 952         bigmac_init_hw(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 = netdev_priv(dev);
 960         int len, entry;
 961         u32 mapping;
 962
 963         len = skb->len;
 964         mapping = dma_map_single(&bp->bigmac_op->dev, skb->data,
 965                                  len, DMA_TO_DEVICE);
 966
 967         /* Avoid a race... */
 968         spin_lock_irq(&bp->lock);
 969         entry = bp->tx_new;
 970         DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
 971         bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
 972         bp->tx_skbs[entry] = skb;
 973         bp->bmac_block->be_txd[entry].tx_addr = mapping;
 974         bp->bmac_block->be_txd[entry].tx_flags =
 975                 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
 976         bp->tx_new = NEXT_TX(entry);
 977         if (TX_BUFFS_AVAIL(bp) <= 0)
 978                 netif_stop_queue(dev);
 979         spin_unlock_irq(&bp->lock);
 980
 981         /* Get it going. */
 982         sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
 983
 984
 985         return NETDEV_TX_OK;
 986 }
 987
 988 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
 989 {
 990         struct bigmac *bp = netdev_priv(dev);
 991
 992         bigmac_get_counters(bp, bp->bregs);
 993         return &bp->enet_stats;
 994 }
 995
 996 static void bigmac_set_multicast(struct net_device *dev)
 997 {
 998         struct bigmac *bp = netdev_priv(dev);
 999         void __iomem *bregs = bp->bregs;
1000         struct netdev_hw_addr *ha;
1001         int i;
1002         u32 tmp, crc;
1003
1004         /* Disable the receiver.  The bit self-clears when
1005          * the operation is complete.
1006          */
1007         tmp = sbus_readl(bregs + BMAC_RXCFG);
1008         tmp &= ~(BIGMAC_RXCFG_ENABLE);
1009         sbus_writel(tmp, bregs + BMAC_RXCFG);
1010         while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1011                 udelay(20);
1012
1013         if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
1014                 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1015                 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1016                 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1017                 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1018         } else if (dev->flags & IFF_PROMISC) {
1019                 tmp = sbus_readl(bregs + BMAC_RXCFG);
1020                 tmp |= BIGMAC_RXCFG_PMISC;
1021                 sbus_writel(tmp, bregs + BMAC_RXCFG);
1022         } else {
1023                 u16 hash_table[4];
1024
1025                 for (i = 0; i < 4; i++)
1026                         hash_table[i] = 0;
1027
1028                 netdev_for_each_mc_addr(ha, dev) {
1029                         crc = ether_crc_le(6, ha->addr);
1030                         crc >>= 26;
1031                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1032                 }
1033                 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1034                 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1035                 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1036                 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1037         }
1038
1039         /* Re-enable the receiver. */
1040         tmp = sbus_readl(bregs + BMAC_RXCFG);
1041         tmp |= BIGMAC_RXCFG_ENABLE;
1042         sbus_writel(tmp, bregs + BMAC_RXCFG);
1043 }
1044
1045 /* Ethtool support... */
1046 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1047 {
1048         strcpy(info->driver, "sunbmac");
1049         strcpy(info->version, "2.0");
1050 }
1051
1052 static u32 bigmac_get_link(struct net_device *dev)
1053 {
1054         struct bigmac *bp = netdev_priv(dev);
1055
1056         spin_lock_irq(&bp->lock);
1057         bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1058         spin_unlock_irq(&bp->lock);
1059
1060         return (bp->sw_bmsr & BMSR_LSTATUS);
1061 }
1062
1063 static const struct ethtool_ops bigmac_ethtool_ops = {
1064         .get_drvinfo            = bigmac_get_drvinfo,
1065         .get_link               = bigmac_get_link,
1066 };
1067
1068 static const struct net_device_ops bigmac_ops = {
1069         .ndo_open               = bigmac_open,
1070         .ndo_stop               = bigmac_close,
1071         .ndo_start_xmit         = bigmac_start_xmit,
1072         .ndo_get_stats          = bigmac_get_stats,
1073         .ndo_set_multicast_list = bigmac_set_multicast,
1074         .ndo_tx_timeout         = bigmac_tx_timeout,
1075         .ndo_change_mtu         = eth_change_mtu,
1076         .ndo_set_mac_address    = eth_mac_addr,
1077         .ndo_validate_addr      = eth_validate_addr,
1078 };
1079
1080 static int __devinit bigmac_ether_init(struct platform_device *op,
1081                                        struct platform_device *qec_op)
1082 {
1083         static int version_printed;
1084         struct net_device *dev;
1085         u8 bsizes, bsizes_more;
1086         struct bigmac *bp;
1087         int i;
1088
1089         /* Get a new device struct for this interface. */
1090         dev = alloc_etherdev(sizeof(struct bigmac));
1091         if (!dev)
1092                 return -ENOMEM;
1093
1094         if (version_printed++ == 0)
1095                 printk(KERN_INFO "%s", version);
1096
1097         for (i = 0; i < 6; i++)
1098                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1099
1100         /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1101         bp = netdev_priv(dev);
1102         bp->qec_op = qec_op;
1103         bp->bigmac_op = op;
1104
1105         SET_NETDEV_DEV(dev, &op->dev);
1106
1107         spin_lock_init(&bp->lock);
1108
1109         /* Map in QEC global control registers. */
1110         bp->gregs = of_ioremap(&qec_op->resource[0], 0,
1111                                GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1112         if (!bp->gregs) {
1113                 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1114                 goto fail_and_cleanup;
1115         }
1116
1117         /* Make sure QEC is in BigMAC mode. */
1118         if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1119                 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1120                 goto fail_and_cleanup;
1121         }
1122
1123         /* Reset the QEC. */
1124         if (qec_global_reset(bp->gregs))
1125                 goto fail_and_cleanup;
1126
1127         /* Get supported SBUS burst sizes. */
1128         bsizes = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1129         bsizes_more = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1130
1131         bsizes &= 0xff;
1132         if (bsizes_more != 0xff)
1133                 bsizes &= bsizes_more;
1134         if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1135             (bsizes & DMA_BURST32) == 0)
1136                 bsizes = (DMA_BURST32 - 1);
1137         bp->bigmac_bursts = bsizes;
1138
1139         /* Perform QEC initialization. */
1140         qec_init(bp);
1141
1142         /* Map in the BigMAC channel registers. */
1143         bp->creg = of_ioremap(&op->resource[0], 0,
1144                               CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1145         if (!bp->creg) {
1146                 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1147                 goto fail_and_cleanup;
1148         }
1149
1150         /* Map in the BigMAC control registers. */
1151         bp->bregs = of_ioremap(&op->resource[1], 0,
1152                                BMAC_REG_SIZE, "BigMAC Primary Regs");
1153         if (!bp->bregs) {
1154                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1155                 goto fail_and_cleanup;
1156         }
1157
1158         /* Map in the BigMAC transceiver registers, this is how you poke at
1159          * the BigMAC's PHY.
1160          */
1161         bp->tregs = of_ioremap(&op->resource[2], 0,
1162                                TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1163         if (!bp->tregs) {
1164                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1165                 goto fail_and_cleanup;
1166         }
1167
1168         /* Stop the BigMAC. */
1169         bigmac_stop(bp);
1170
1171         /* Allocate transmit/receive descriptor DVMA block. */
1172         bp->bmac_block = dma_alloc_coherent(&bp->bigmac_op->dev,
1173                                             PAGE_SIZE,
1174                                             &bp->bblock_dvma, GFP_ATOMIC);
1175         if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1176                 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1177                 goto fail_and_cleanup;
1178         }
1179
1180         /* Get the board revision of this BigMAC. */
1181         bp->board_rev = of_getintprop_default(bp->bigmac_op->dev.of_node,
1182                                               "board-version", 1);
1183
1184         /* Init auto-negotiation timer state. */
1185         init_timer(&bp->bigmac_timer);
1186         bp->timer_state = asleep;
1187         bp->timer_ticks = 0;
1188
1189         /* Backlink to generic net device struct. */
1190         bp->dev = dev;
1191
1192         /* Set links to our BigMAC open and close routines. */
1193         dev->ethtool_ops = &bigmac_ethtool_ops;
1194         dev->netdev_ops = &bigmac_ops;
1195         dev->watchdog_timeo = 5*HZ;
1196
1197         /* Finish net device registration. */
1198         dev->irq = bp->bigmac_op->archdata.irqs[0];
1199         dev->dma = 0;
1200
1201         if (register_netdev(dev)) {
1202                 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1203                 goto fail_and_cleanup;
1204         }
1205
1206         dev_set_drvdata(&bp->bigmac_op->dev, bp);
1207
1208         printk(KERN_INFO "%s: BigMAC 100baseT Ethernet %pM\n",
1209                dev->name, dev->dev_addr);
1210
1211         return 0;
1212
1213 fail_and_cleanup:
1214         /* Something went wrong, undo whatever we did so far. */
1215         /* Free register mappings if any. */
1216         if (bp->gregs)
1217                 of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1218         if (bp->creg)
1219                 of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1220         if (bp->bregs)
1221                 of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1222         if (bp->tregs)
1223                 of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1224
1225         if (bp->bmac_block)
1226                 dma_free_coherent(&bp->bigmac_op->dev,
1227                                   PAGE_SIZE,
1228                                   bp->bmac_block,
1229                                   bp->bblock_dvma);
1230
1231         /* This also frees the co-located private data */
1232         free_netdev(dev);
1233         return -ENODEV;
1234 }
1235
1236 /* QEC can be the parent of either QuadEthernet or a BigMAC.  We want
1237  * the latter.
1238  */
1239 static int __devinit bigmac_sbus_probe(struct platform_device *op)
1240 {
1241         struct device *parent = op->dev.parent;
1242         struct platform_device *qec_op;
1243
1244         qec_op = to_platform_device(parent);
1245
1246         return bigmac_ether_init(op, qec_op);
1247 }
1248
1249 static int __devexit bigmac_sbus_remove(struct platform_device *op)
1250 {
1251         struct bigmac *bp = dev_get_drvdata(&op->dev);
1252         struct device *parent = op->dev.parent;
1253         struct net_device *net_dev = bp->dev;
1254         struct platform_device *qec_op;
1255
1256         qec_op = to_platform_device(parent);
1257
1258         unregister_netdev(net_dev);
1259
1260         of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1261         of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1262         of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1263         of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1264         dma_free_coherent(&op->dev,
1265                           PAGE_SIZE,
1266                           bp->bmac_block,
1267                           bp->bblock_dvma);
1268
1269         free_netdev(net_dev);
1270
1271         dev_set_drvdata(&op->dev, NULL);
1272
1273         return 0;
1274 }
1275
1276 static const struct of_device_id bigmac_sbus_match[] = {
1277         {
1278                 .name = "be",
1279         },
1280         {},
1281 };
1282
1283 MODULE_DEVICE_TABLE(of, bigmac_sbus_match);
1284
1285 static struct platform_driver bigmac_sbus_driver = {
1286         .driver = {
1287                 .name = "sunbmac",
1288                 .owner = THIS_MODULE,
1289                 .of_match_table = bigmac_sbus_match,
1290         },
1291         .probe          = bigmac_sbus_probe,
1292         .remove         = __devexit_p(bigmac_sbus_remove),
1293 };
1294
1295 static int __init bigmac_init(void)
1296 {
1297         return platform_driver_register(&bigmac_sbus_driver);
1298 }
1299
1300 static void __exit bigmac_exit(void)
1301 {
1302         platform_driver_unregister(&bigmac_sbus_driver);
1303 }
1304
1305 module_init(bigmac_init);
1306 module_exit(bigmac_exit);