kernel/drivers/net/ethernet/sun/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/crc32.h>
  17 #include <linux/errno.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/mii.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
  38 #include "sunbmac.h"
  39
  40 #define DRV_NAME        "sunbmac"
  41 #define DRV_VERSION     "2.1"
  42 #define DRV_RELDATE     "August 26, 2008"
  43 #define DRV_AUTHOR      "David S. Miller (davem@davemloft.net)"
  44
  45 static char version[] =
  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 #define DEFAULT_JAMSIZE    4 /* Toe jam */
  76
  77 #define QEC_RESET_TRIES 200
  78
  79 static int qec_global_reset(void __iomem *gregs)
  80 {
  81         int tries = QEC_RESET_TRIES;
  82
  83         sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
  84         while (--tries) {
  85                 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
  86                         udelay(20);
  87                         continue;
  88                 }
  89                 break;
  90         }
  91         if (tries)
  92                 return 0;
  93         printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
  94         return -1;
  95 }
  96
  97 static void qec_init(struct bigmac *bp)
  98 {
  99         struct platform_device *qec_op = bp->qec_op;
 100         void __iomem *gregs = bp->gregs;
 101         u8 bsizes = bp->bigmac_bursts;
 102         u32 regval;
 103
 104         /* 64byte bursts do not work at the moment, do
 105          * not even try to enable them.  -DaveM
 106          */
 107         if (bsizes & DMA_BURST32)
 108                 regval = GLOB_CTRL_B32;
 109         else
 110                 regval = GLOB_CTRL_B16;
 111         sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
 112         sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
 113
 114         /* All of memsize is given to bigmac. */
 115         sbus_writel(resource_size(&qec_op->resource[1]),
 116                     gregs + GLOB_MSIZE);
 117
 118         /* Half to the transmitter, half to the receiver. */
 119         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 120                     gregs + GLOB_TSIZE);
 121         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 122                     gregs + GLOB_RSIZE);
 123 }
 124
 125 #define TX_RESET_TRIES     32
 126 #define RX_RESET_TRIES     32
 127
 128 static void bigmac_tx_reset(void __iomem *bregs)
 129 {
 130         int tries = TX_RESET_TRIES;
 131
 132         sbus_writel(0, bregs + BMAC_TXCFG);
 133
 134         /* The fifo threshold bit is read-only and does
 135          * not clear.  -DaveM
 136          */
 137         while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
 138                --tries != 0)
 139                 udelay(20);
 140
 141         if (!tries) {
 142                 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
 143                 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
 144                        sbus_readl(bregs + BMAC_TXCFG));
 145         }
 146 }
 147
 148 static void bigmac_rx_reset(void __iomem *bregs)
 149 {
 150         int tries = RX_RESET_TRIES;
 151
 152         sbus_writel(0, bregs + BMAC_RXCFG);
 153         while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
 154                 udelay(20);
 155
 156         if (!tries) {
 157                 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
 158                 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
 159                        sbus_readl(bregs + BMAC_RXCFG));
 160         }
 161 }
 162
 163 /* Reset the transmitter and receiver. */
 164 static void bigmac_stop(struct bigmac *bp)
 165 {
 166         bigmac_tx_reset(bp->bregs);
 167         bigmac_rx_reset(bp->bregs);
 168 }
 169
 170 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
 171 {
 172         struct net_device_stats *stats = &bp->enet_stats;
 173
 174         stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
 175         sbus_writel(0, bregs + BMAC_RCRCECTR);
 176
 177         stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
 178         sbus_writel(0, bregs + BMAC_UNALECTR);
 179
 180         stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
 181         sbus_writel(0, bregs + BMAC_GLECTR);
 182
 183         stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
 184
 185         stats->collisions +=
 186                 (sbus_readl(bregs + BMAC_EXCTR) +
 187                  sbus_readl(bregs + BMAC_LTCTR));
 188         sbus_writel(0, bregs + BMAC_EXCTR);
 189         sbus_writel(0, bregs + BMAC_LTCTR);
 190 }
 191
 192 static void bigmac_clean_rings(struct bigmac *bp)
 193 {
 194         int i;
 195
 196         for (i = 0; i < RX_RING_SIZE; i++) {
 197                 if (bp->rx_skbs[i] != NULL) {
 198                         dev_kfree_skb_any(bp->rx_skbs[i]);
 199                         bp->rx_skbs[i] = NULL;
 200                 }
 201         }
 202
 203         for (i = 0; i < TX_RING_SIZE; i++) {
 204                 if (bp->tx_skbs[i] != NULL) {
 205                         dev_kfree_skb_any(bp->tx_skbs[i]);
 206                         bp->tx_skbs[i] = NULL;
 207                 }
 208         }
 209 }
 210
 211 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
 212 {
 213         struct bmac_init_block *bb = bp->bmac_block;
 214         int i;
 215         gfp_t gfp_flags = GFP_KERNEL;
 216
 217         if (from_irq || in_interrupt())
 218                 gfp_flags = GFP_ATOMIC;
 219
 220         bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
 221
 222         /* Free any skippy bufs left around in the rings. */
 223         bigmac_clean_rings(bp);
 224
 225         /* Now get new skbufs for the receive ring. */
 226         for (i = 0; i < RX_RING_SIZE; i++) {
 227                 struct sk_buff *skb;
 228
 229                 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
 230                 if (!skb)
 231                         continue;
 232
 233                 bp->rx_skbs[i] = skb;
 234
 235                 /* Because we reserve afterwards. */
 236                 skb_put(skb, ETH_FRAME_LEN);
 237                 skb_reserve(skb, 34);
 238
 239                 bb->be_rxd[i].rx_addr =
 240                         dma_map_single(&bp->bigmac_op->dev,
 241                                        skb->data,
 242                                        RX_BUF_ALLOC_SIZE - 34,
 243                                        DMA_FROM_DEVICE);
 244                 bb->be_rxd[i].rx_flags =
 245                         (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 246         }
 247
 248         for (i = 0; i < TX_RING_SIZE; i++)
 249                 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
 250 }
 251
 252 #define MGMT_CLKON  (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
 253 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
 254
 255 static void idle_transceiver(void __iomem *tregs)
 256 {
 257         int i = 20;
 258
 259         while (i--) {
 260                 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
 261                 sbus_readl(tregs + TCVR_MPAL);
 262                 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
 263                 sbus_readl(tregs + TCVR_MPAL);
 264         }
 265 }
 266
 267 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
 268 {
 269         if (bp->tcvr_type == internal) {
 270                 bit = (bit & 1) << 3;
 271                 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
 272                             tregs + TCVR_MPAL);
 273                 sbus_readl(tregs + TCVR_MPAL);
 274                 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 275                             tregs + TCVR_MPAL);
 276                 sbus_readl(tregs + TCVR_MPAL);
 277         } else if (bp->tcvr_type == external) {
 278                 bit = (bit & 1) << 2;
 279                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
 280                             tregs + TCVR_MPAL);
 281                 sbus_readl(tregs + TCVR_MPAL);
 282                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
 283                             tregs + TCVR_MPAL);
 284                 sbus_readl(tregs + TCVR_MPAL);
 285         } else {
 286                 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
 287         }
 288 }
 289
 290 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
 291 {
 292         int retval = 0;
 293
 294         if (bp->tcvr_type == internal) {
 295                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 296                 sbus_readl(tregs + TCVR_MPAL);
 297                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 298                             tregs + TCVR_MPAL);
 299                 sbus_readl(tregs + TCVR_MPAL);
 300                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 301         } else if (bp->tcvr_type == external) {
 302                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 303                 sbus_readl(tregs + TCVR_MPAL);
 304                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 305                 sbus_readl(tregs + TCVR_MPAL);
 306                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 307         } else {
 308                 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
 309         }
 310         return retval;
 311 }
 312
 313 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
 314 {
 315         int retval = 0;
 316
 317         if (bp->tcvr_type == internal) {
 318                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 319                 sbus_readl(tregs + TCVR_MPAL);
 320                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 321                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 322                 sbus_readl(tregs + TCVR_MPAL);
 323         } else if (bp->tcvr_type == external) {
 324                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 325                 sbus_readl(tregs + TCVR_MPAL);
 326                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 327                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 328                 sbus_readl(tregs + TCVR_MPAL);
 329         } else {
 330                 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
 331         }
 332         return retval;
 333 }
 334
 335 static void put_tcvr_byte(struct bigmac *bp,
 336                           void __iomem *tregs,
 337                           unsigned int byte)
 338 {
 339         int shift = 4;
 340
 341         do {
 342                 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
 343                 shift -= 1;
 344         } while (shift >= 0);
 345 }
 346
 347 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
 348                               int reg, unsigned short val)
 349 {
 350         int shift;
 351
 352         reg &= 0xff;
 353         val &= 0xffff;
 354         switch(bp->tcvr_type) {
 355         case internal:
 356         case external:
 357                 break;
 358
 359         default:
 360                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 361                 return;
 362         }
 363
 364         idle_transceiver(tregs);
 365         write_tcvr_bit(bp, tregs, 0);
 366         write_tcvr_bit(bp, tregs, 1);
 367         write_tcvr_bit(bp, tregs, 0);
 368         write_tcvr_bit(bp, tregs, 1);
 369
 370         put_tcvr_byte(bp, tregs,
 371                       ((bp->tcvr_type == internal) ?
 372                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 373
 374         put_tcvr_byte(bp, tregs, reg);
 375
 376         write_tcvr_bit(bp, tregs, 1);
 377         write_tcvr_bit(bp, tregs, 0);
 378
 379         shift = 15;
 380         do {
 381                 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
 382                 shift -= 1;
 383         } while (shift >= 0);
 384 }
 385
 386 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
 387                                        void __iomem *tregs,
 388                                        int reg)
 389 {
 390         unsigned short retval = 0;
 391
 392         reg &= 0xff;
 393         switch(bp->tcvr_type) {
 394         case internal:
 395         case external:
 396                 break;
 397
 398         default:
 399                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 400                 return 0xffff;
 401         }
 402
 403         idle_transceiver(tregs);
 404         write_tcvr_bit(bp, tregs, 0);
 405         write_tcvr_bit(bp, tregs, 1);
 406         write_tcvr_bit(bp, tregs, 1);
 407         write_tcvr_bit(bp, tregs, 0);
 408
 409         put_tcvr_byte(bp, tregs,
 410                       ((bp->tcvr_type == internal) ?
 411                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 412
 413         put_tcvr_byte(bp, tregs, reg);
 414
 415         if (bp->tcvr_type == external) {
 416                 int shift = 15;
 417
 418                 (void) read_tcvr_bit2(bp, tregs);
 419                 (void) read_tcvr_bit2(bp, tregs);
 420
 421                 do {
 422                         int tmp;
 423
 424                         tmp = read_tcvr_bit2(bp, tregs);
 425                         retval |= ((tmp & 1) << shift);
 426                         shift -= 1;
 427                 } while (shift >= 0);
 428
 429                 (void) read_tcvr_bit2(bp, tregs);
 430                 (void) read_tcvr_bit2(bp, tregs);
 431                 (void) read_tcvr_bit2(bp, tregs);
 432         } else {
 433                 int shift = 15;
 434
 435                 (void) read_tcvr_bit(bp, tregs);
 436                 (void) read_tcvr_bit(bp, tregs);
 437
 438                 do {
 439                         int tmp;
 440
 441                         tmp = read_tcvr_bit(bp, tregs);
 442                         retval |= ((tmp & 1) << shift);
 443                         shift -= 1;
 444                 } while (shift >= 0);
 445
 446                 (void) read_tcvr_bit(bp, tregs);
 447                 (void) read_tcvr_bit(bp, tregs);
 448                 (void) read_tcvr_bit(bp, tregs);
 449         }
 450         return retval;
 451 }
 452
 453 static void bigmac_tcvr_init(struct bigmac *bp)
 454 {
 455         void __iomem *tregs = bp->tregs;
 456         u32 mpal;
 457
 458         idle_transceiver(tregs);
 459         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 460                     tregs + TCVR_MPAL);
 461         sbus_readl(tregs + TCVR_MPAL);
 462
 463         /* Only the bit for the present transceiver (internal or
 464          * external) will stick, set them both and see what stays.
 465          */
 466         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 467         sbus_readl(tregs + TCVR_MPAL);
 468         udelay(20);
 469
 470         mpal = sbus_readl(tregs + TCVR_MPAL);
 471         if (mpal & MGMT_PAL_EXT_MDIO) {
 472                 bp->tcvr_type = external;
 473                 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 474                             tregs + TCVR_TPAL);
 475                 sbus_readl(tregs + TCVR_TPAL);
 476         } else if (mpal & MGMT_PAL_INT_MDIO) {
 477                 bp->tcvr_type = internal;
 478                 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
 479                               TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 480                             tregs + TCVR_TPAL);
 481                 sbus_readl(tregs + TCVR_TPAL);
 482         } else {
 483                 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
 484                        "external MDIO available!\n");
 485                 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
 486                        sbus_readl(tregs + TCVR_MPAL),
 487                        sbus_readl(tregs + TCVR_TPAL));
 488         }
 489 }
 490
 491 static int bigmac_init_hw(struct bigmac *, int);
 492
 493 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
 494 {
 495         if (bp->sw_bmcr & BMCR_SPEED100) {
 496                 int timeout;
 497
 498                 /* Reset the PHY. */
 499                 bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 500                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 501                 bp->sw_bmcr     = (BMCR_RESET);
 502                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 503
 504                 timeout = 64;
 505                 while (--timeout) {
 506                         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 507                         if ((bp->sw_bmcr & BMCR_RESET) == 0)
 508                                 break;
 509                         udelay(20);
 510                 }
 511                 if (timeout == 0)
 512                         printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 513
 514                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 515
 516                 /* Now we try 10baseT. */
 517                 bp->sw_bmcr &= ~(BMCR_SPEED100);
 518                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 519                 return 0;
 520         }
 521
 522         /* We've tried them all. */
 523         return -1;
 524 }
 525
 526 static void bigmac_timer(unsigned long data)
 527 {
 528         struct bigmac *bp = (struct bigmac *) data;
 529         void __iomem *tregs = bp->tregs;
 530         int restart_timer = 0;
 531
 532         bp->timer_ticks++;
 533         if (bp->timer_state == ltrywait) {
 534                 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, MII_BMSR);
 535                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 536                 if (bp->sw_bmsr & BMSR_LSTATUS) {
 537                         printk(KERN_INFO "%s: Link is now up at %s.\n",
 538                                bp->dev->name,
 539                                (bp->sw_bmcr & BMCR_SPEED100) ?
 540                                "100baseT" : "10baseT");
 541                         bp->timer_state = asleep;
 542                         restart_timer = 0;
 543                 } else {
 544                         if (bp->timer_ticks >= 4) {
 545                                 int ret;
 546
 547                                 ret = try_next_permutation(bp, tregs);
 548                                 if (ret == -1) {
 549                                         printk(KERN_ERR "%s: Link down, cable problem?\n",
 550                                                bp->dev->name);
 551                                         ret = bigmac_init_hw(bp, 0);
 552                                         if (ret) {
 553                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 554                                                        "BigMAC.\n", bp->dev->name);
 555                                         }
 556                                         return;
 557                                 }
 558                                 bp->timer_ticks = 0;
 559                                 restart_timer = 1;
 560                         } else {
 561                                 restart_timer = 1;
 562                         }
 563                 }
 564         } else {
 565                 /* Can't happens.... */
 566                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 567                        bp->dev->name);
 568                 restart_timer = 0;
 569                 bp->timer_ticks = 0;
 570                 bp->timer_state = asleep; /* foo on you */
 571         }
 572
 573         if (restart_timer != 0) {
 574                 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 575                 add_timer(&bp->bigmac_timer);
 576         }
 577 }
 578
 579 /* Well, really we just force the chip into 100baseT then
 580  * 10baseT, each time checking for a link status.
 581  */
 582 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
 583 {
 584         void __iomem *tregs = bp->tregs;
 585         int timeout;
 586
 587         /* Grab new software copies of PHY registers. */
 588         bp->sw_bmsr     = bigmac_tcvr_read(bp, tregs, MII_BMSR);
 589         bp->sw_bmcr     = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 590
 591         /* Reset the PHY. */
 592         bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 593         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 594         bp->sw_bmcr     = (BMCR_RESET);
 595         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 596
 597         timeout = 64;
 598         while (--timeout) {
 599                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 600                 if ((bp->sw_bmcr & BMCR_RESET) == 0)
 601                         break;
 602                 udelay(20);
 603         }
 604         if (timeout == 0)
 605                 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 606
 607         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 608
 609         /* First we try 100baseT. */
 610         bp->sw_bmcr |= BMCR_SPEED100;
 611         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 612
 613         bp->timer_state = ltrywait;
 614         bp->timer_ticks = 0;
 615         bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
 616         bp->bigmac_timer.data = (unsigned long) bp;
 617         bp->bigmac_timer.function = bigmac_timer;
 618         add_timer(&bp->bigmac_timer);
 619 }
 620
 621 static int bigmac_init_hw(struct bigmac *bp, int from_irq)
 622 {
 623         void __iomem *gregs        = bp->gregs;
 624         void __iomem *cregs        = bp->creg;
 625         void __iomem *bregs        = bp->bregs;
 626         unsigned char *e = &bp->dev->dev_addr[0];
 627
 628         /* Latch current counters into statistics. */
 629         bigmac_get_counters(bp, bregs);
 630
 631         /* Reset QEC. */
 632         qec_global_reset(gregs);
 633
 634         /* Init QEC. */
 635         qec_init(bp);
 636
 637         /* Alloc and reset the tx/rx descriptor chains. */
 638         bigmac_init_rings(bp, from_irq);
 639
 640         /* Initialize the PHY. */
 641         bigmac_tcvr_init(bp);
 642
 643         /* Stop transmitter and receiver. */
 644         bigmac_stop(bp);
 645
 646         /* Set hardware ethernet address. */
 647         sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
 648         sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
 649         sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
 650
 651         /* Clear the hash table until mc upload occurs. */
 652         sbus_writel(0, bregs + BMAC_HTABLE3);
 653         sbus_writel(0, bregs + BMAC_HTABLE2);
 654         sbus_writel(0, bregs + BMAC_HTABLE1);
 655         sbus_writel(0, bregs + BMAC_HTABLE0);
 656
 657         /* Enable Big Mac hash table filter. */
 658         sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
 659                     bregs + BMAC_RXCFG);
 660         udelay(20);
 661
 662         /* Ok, configure the Big Mac transmitter. */
 663         sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
 664
 665         /* The HME docs recommend to use the 10LSB of our MAC here. */
 666         sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
 667                     bregs + BMAC_RSEED);
 668
 669         /* Enable the output drivers no matter what. */
 670         sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
 671                     bregs + BMAC_XIFCFG);
 672
 673         /* Tell the QEC where the ring descriptors are. */
 674         sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
 675                     cregs + CREG_RXDS);
 676         sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
 677                     cregs + CREG_TXDS);
 678
 679         /* Setup the FIFO pointers into QEC local memory. */
 680         sbus_writel(0, cregs + CREG_RXRBUFPTR);
 681         sbus_writel(0, cregs + CREG_RXWBUFPTR);
 682         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 683                     cregs + CREG_TXRBUFPTR);
 684         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 685                     cregs + CREG_TXWBUFPTR);
 686
 687         /* Tell bigmac what interrupts we don't want to hear about. */
 688         sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
 689                     bregs + BMAC_IMASK);
 690
 691         /* Enable the various other irq's. */
 692         sbus_writel(0, cregs + CREG_RIMASK);
 693         sbus_writel(0, cregs + CREG_TIMASK);
 694         sbus_writel(0, cregs + CREG_QMASK);
 695         sbus_writel(0, cregs + CREG_BMASK);
 696
 697         /* Set jam size to a reasonable default. */
 698         sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
 699
 700         /* Clear collision counter. */
 701         sbus_writel(0, cregs + CREG_CCNT);
 702
 703         /* Enable transmitter and receiver. */
 704         sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
 705                     bregs + BMAC_TXCFG);
 706         sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
 707                     bregs + BMAC_RXCFG);
 708
 709         /* Ok, start detecting link speed/duplex. */
 710         bigmac_begin_auto_negotiation(bp);
 711
 712         /* Success. */
 713         return 0;
 714 }
 715
 716 /* Error interrupts get sent here. */
 717 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
 718 {
 719         printk(KERN_ERR "bigmac_is_medium_rare: ");
 720         if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
 721                 if (qec_status & GLOB_STAT_ER)
 722                         printk("QEC_ERROR, ");
 723                 if (qec_status & GLOB_STAT_BM)
 724                         printk("QEC_BMAC_ERROR, ");
 725         }
 726         if (bmac_status & CREG_STAT_ERRORS) {
 727                 if (bmac_status & CREG_STAT_BERROR)
 728                         printk("BMAC_ERROR, ");
 729                 if (bmac_status & CREG_STAT_TXDERROR)
 730                         printk("TXD_ERROR, ");
 731                 if (bmac_status & CREG_STAT_TXLERR)
 732                         printk("TX_LATE_ERROR, ");
 733                 if (bmac_status & CREG_STAT_TXPERR)
 734                         printk("TX_PARITY_ERROR, ");
 735                 if (bmac_status & CREG_STAT_TXSERR)
 736                         printk("TX_SBUS_ERROR, ");
 737
 738                 if (bmac_status & CREG_STAT_RXDROP)
 739                         printk("RX_DROP_ERROR, ");
 740
 741                 if (bmac_status & CREG_STAT_RXSMALL)
 742                         printk("RX_SMALL_ERROR, ");
 743                 if (bmac_status & CREG_STAT_RXLERR)
 744                         printk("RX_LATE_ERROR, ");
 745                 if (bmac_status & CREG_STAT_RXPERR)
 746                         printk("RX_PARITY_ERROR, ");
 747                 if (bmac_status & CREG_STAT_RXSERR)
 748                         printk("RX_SBUS_ERROR, ");
 749         }
 750
 751         printk(" RESET\n");
 752         bigmac_init_hw(bp, 1);
 753 }
 754
 755 /* BigMAC transmit complete service routines. */
 756 static void bigmac_tx(struct bigmac *bp)
 757 {
 758         struct be_txd *txbase = &bp->bmac_block->be_txd[0];
 759         struct net_device *dev = bp->dev;
 760         int elem;
 761
 762         spin_lock(&bp->lock);
 763
 764         elem = bp->tx_old;
 765         DTX(("bigmac_tx: tx_old[%d] ", elem));
 766         while (elem != bp->tx_new) {
 767                 struct sk_buff *skb;
 768                 struct be_txd *this = &txbase[elem];
 769
 770                 DTX(("this(%p) [flags(%08x)addr(%08x)]",
 771                      this, this->tx_flags, this->tx_addr));
 772
 773                 if (this->tx_flags & TXD_OWN)
 774                         break;
 775                 skb = bp->tx_skbs[elem];
 776                 bp->enet_stats.tx_packets++;
 777                 bp->enet_stats.tx_bytes += skb->len;
 778                 dma_unmap_single(&bp->bigmac_op->dev,
 779                                  this->tx_addr, skb->len,
 780                                  DMA_TO_DEVICE);
 781
 782                 DTX(("skb(%p) ", skb));
 783                 bp->tx_skbs[elem] = NULL;
 784                 dev_kfree_skb_irq(skb);
 785
 786                 elem = NEXT_TX(elem);
 787         }
 788         DTX((" DONE, tx_old=%d\n", elem));
 789         bp->tx_old = elem;
 790
 791         if (netif_queue_stopped(dev) &&
 792             TX_BUFFS_AVAIL(bp) > 0)
 793                 netif_wake_queue(bp->dev);
 794
 795         spin_unlock(&bp->lock);
 796 }
 797
 798 /* BigMAC receive complete service routines. */
 799 static void bigmac_rx(struct bigmac *bp)
 800 {
 801         struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
 802         struct be_rxd *this;
 803         int elem = bp->rx_new, drops = 0;
 804         u32 flags;
 805
 806         this = &rxbase[elem];
 807         while (!((flags = this->rx_flags) & RXD_OWN)) {
 808                 struct sk_buff *skb;
 809                 int len = (flags & RXD_LENGTH); /* FCS not included */
 810
 811                 /* Check for errors. */
 812                 if (len < ETH_ZLEN) {
 813                         bp->enet_stats.rx_errors++;
 814                         bp->enet_stats.rx_length_errors++;
 815
 816         drop_it:
 817                         /* Return it to the BigMAC. */
 818                         bp->enet_stats.rx_dropped++;
 819                         this->rx_flags =
 820                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 821                         goto next;
 822                 }
 823                 skb = bp->rx_skbs[elem];
 824                 if (len > RX_COPY_THRESHOLD) {
 825                         struct sk_buff *new_skb;
 826
 827                         /* Now refill the entry, if we can. */
 828                         new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 829                         if (new_skb == NULL) {
 830                                 drops++;
 831                                 goto drop_it;
 832                         }
 833                         dma_unmap_single(&bp->bigmac_op->dev,
 834                                          this->rx_addr,
 835                                          RX_BUF_ALLOC_SIZE - 34,
 836                                          DMA_FROM_DEVICE);
 837                         bp->rx_skbs[elem] = new_skb;
 838                         skb_put(new_skb, ETH_FRAME_LEN);
 839                         skb_reserve(new_skb, 34);
 840                         this->rx_addr =
 841                                 dma_map_single(&bp->bigmac_op->dev,
 842                                                new_skb->data,
 843                                                RX_BUF_ALLOC_SIZE - 34,
 844                                                DMA_FROM_DEVICE);
 845                         this->rx_flags =
 846                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 847
 848                         /* Trim the original skb for the netif. */
 849                         skb_trim(skb, len);
 850                 } else {
 851                         struct sk_buff *copy_skb = netdev_alloc_skb(bp->dev, len + 2);
 852
 853                         if (copy_skb == NULL) {
 854                                 drops++;
 855                                 goto drop_it;
 856                         }
 857                         skb_reserve(copy_skb, 2);
 858                         skb_put(copy_skb, len);
 859                         dma_sync_single_for_cpu(&bp->bigmac_op->dev,
 860                                                 this->rx_addr, len,
 861                                                 DMA_FROM_DEVICE);
 862                         skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len);
 863                         dma_sync_single_for_device(&bp->bigmac_op->dev,
 864                                                    this->rx_addr, len,
 865                                                    DMA_FROM_DEVICE);
 866
 867                         /* Reuse original ring buffer. */
 868                         this->rx_flags =
 869                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 870
 871                         skb = copy_skb;
 872                 }
 873
 874                 /* No checksums done by the BigMAC ;-( */
 875                 skb->protocol = eth_type_trans(skb, bp->dev);
 876                 netif_rx(skb);
 877                 bp->enet_stats.rx_packets++;
 878                 bp->enet_stats.rx_bytes += len;
 879         next:
 880                 elem = NEXT_RX(elem);
 881                 this = &rxbase[elem];
 882         }
 883         bp->rx_new = elem;
 884         if (drops)
 885                 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
 886 }
 887
 888 static irqreturn_t bigmac_interrupt(int irq, void *dev_id)
 889 {
 890         struct bigmac *bp = (struct bigmac *) dev_id;
 891         u32 qec_status, bmac_status;
 892
 893         DIRQ(("bigmac_interrupt: "));
 894
 895         /* Latch status registers now. */
 896         bmac_status = sbus_readl(bp->creg + CREG_STAT);
 897         qec_status = sbus_readl(bp->gregs + GLOB_STAT);
 898
 899         DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
 900         if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
 901            (bmac_status & CREG_STAT_ERRORS))
 902                 bigmac_is_medium_rare(bp, qec_status, bmac_status);
 903
 904         if (bmac_status & CREG_STAT_TXIRQ)
 905                 bigmac_tx(bp);
 906
 907         if (bmac_status & CREG_STAT_RXIRQ)
 908                 bigmac_rx(bp);
 909
 910         return IRQ_HANDLED;
 911 }
 912
 913 static int bigmac_open(struct net_device *dev)
 914 {
 915         struct bigmac *bp = netdev_priv(dev);
 916         int ret;
 917
 918         ret = request_irq(dev->irq, bigmac_interrupt, IRQF_SHARED, dev->name, bp);
 919         if (ret) {
 920                 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
 921                 return ret;
 922         }
 923         init_timer(&bp->bigmac_timer);
 924         ret = bigmac_init_hw(bp, 0);
 925         if (ret)
 926                 free_irq(dev->irq, bp);
 927         return ret;
 928 }
 929
 930 static int bigmac_close(struct net_device *dev)
 931 {
 932         struct bigmac *bp = netdev_priv(dev);
 933
 934         del_timer(&bp->bigmac_timer);
 935         bp->timer_state = asleep;
 936         bp->timer_ticks = 0;
 937
 938         bigmac_stop(bp);
 939         bigmac_clean_rings(bp);
 940         free_irq(dev->irq, bp);
 941         return 0;
 942 }
 943
 944 static void bigmac_tx_timeout(struct net_device *dev)
 945 {
 946         struct bigmac *bp = netdev_priv(dev);
 947
 948         bigmac_init_hw(bp, 0);
 949         netif_wake_queue(dev);
 950 }
 951
 952 /* Put a packet on the wire. */
 953 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 954 {
 955         struct bigmac *bp = netdev_priv(dev);
 956         int len, entry;
 957         u32 mapping;
 958
 959         len = skb->len;
 960         mapping = dma_map_single(&bp->bigmac_op->dev, skb->data,
 961                                  len, DMA_TO_DEVICE);
 962
 963         /* Avoid a race... */
 964         spin_lock_irq(&bp->lock);
 965         entry = bp->tx_new;
 966         DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
 967         bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
 968         bp->tx_skbs[entry] = skb;
 969         bp->bmac_block->be_txd[entry].tx_addr = mapping;
 970         bp->bmac_block->be_txd[entry].tx_flags =
 971                 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
 972         bp->tx_new = NEXT_TX(entry);
 973         if (TX_BUFFS_AVAIL(bp) <= 0)
 974                 netif_stop_queue(dev);
 975         spin_unlock_irq(&bp->lock);
 976
 977         /* Get it going. */
 978         sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
 979
 980
 981         return NETDEV_TX_OK;
 982 }
 983
 984 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
 985 {
 986         struct bigmac *bp = netdev_priv(dev);
 987
 988         bigmac_get_counters(bp, bp->bregs);
 989         return &bp->enet_stats;
 990 }
 991
 992 static void bigmac_set_multicast(struct net_device *dev)
 993 {
 994         struct bigmac *bp = netdev_priv(dev);
 995         void __iomem *bregs = bp->bregs;
 996         struct netdev_hw_addr *ha;
 997         u32 tmp, crc;
 998
 999         /* Disable the receiver.  The bit self-clears when
1000          * the operation is complete.
1001          */
1002         tmp = sbus_readl(bregs + BMAC_RXCFG);
1003         tmp &= ~(BIGMAC_RXCFG_ENABLE);
1004         sbus_writel(tmp, bregs + BMAC_RXCFG);
1005         while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1006                 udelay(20);
1007
1008         if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
1009                 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1010                 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1011                 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1012                 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1013         } else if (dev->flags & IFF_PROMISC) {
1014                 tmp = sbus_readl(bregs + BMAC_RXCFG);
1015                 tmp |= BIGMAC_RXCFG_PMISC;
1016                 sbus_writel(tmp, bregs + BMAC_RXCFG);
1017         } else {
1018                 u16 hash_table[4] = { 0 };
1019
1020                 netdev_for_each_mc_addr(ha, dev) {
1021                         crc = ether_crc_le(6, ha->addr);
1022                         crc >>= 26;
1023                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1024                 }
1025                 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1026                 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1027                 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1028                 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1029         }
1030
1031         /* Re-enable the receiver. */
1032         tmp = sbus_readl(bregs + BMAC_RXCFG);
1033         tmp |= BIGMAC_RXCFG_ENABLE;
1034         sbus_writel(tmp, bregs + BMAC_RXCFG);
1035 }
1036
1037 /* Ethtool support... */
1038 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1039 {
1040         strlcpy(info->driver, "sunbmac", sizeof(info->driver));
1041         strlcpy(info->version, "2.0", sizeof(info->version));
1042 }
1043
1044 static u32 bigmac_get_link(struct net_device *dev)
1045 {
1046         struct bigmac *bp = netdev_priv(dev);
1047
1048         spin_lock_irq(&bp->lock);
1049         bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, MII_BMSR);
1050         spin_unlock_irq(&bp->lock);
1051
1052         return (bp->sw_bmsr & BMSR_LSTATUS);
1053 }
1054
1055 static const struct ethtool_ops bigmac_ethtool_ops = {
1056         .get_drvinfo            = bigmac_get_drvinfo,
1057         .get_link               = bigmac_get_link,
1058 };
1059
1060 static const struct net_device_ops bigmac_ops = {
1061         .ndo_open               = bigmac_open,
1062         .ndo_stop               = bigmac_close,
1063         .ndo_start_xmit         = bigmac_start_xmit,
1064         .ndo_get_stats          = bigmac_get_stats,
1065         .ndo_set_rx_mode        = bigmac_set_multicast,
1066         .ndo_tx_timeout         = bigmac_tx_timeout,
1067         .ndo_change_mtu         = eth_change_mtu,
1068         .ndo_set_mac_address    = eth_mac_addr,
1069         .ndo_validate_addr      = eth_validate_addr,
1070 };
1071
1072 static int bigmac_ether_init(struct platform_device *op,
1073                              struct platform_device *qec_op)
1074 {
1075         static int version_printed;
1076         struct net_device *dev;
1077         u8 bsizes, bsizes_more;
1078         struct bigmac *bp;
1079         int i;
1080
1081         /* Get a new device struct for this interface. */
1082         dev = alloc_etherdev(sizeof(struct bigmac));
1083         if (!dev)
1084                 return -ENOMEM;
1085
1086         if (version_printed++ == 0)
1087                 printk(KERN_INFO "%s", version);
1088
1089         for (i = 0; i < 6; i++)
1090                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1091
1092         /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1093         bp = netdev_priv(dev);
1094         bp->qec_op = qec_op;
1095         bp->bigmac_op = op;
1096
1097         SET_NETDEV_DEV(dev, &op->dev);
1098
1099         spin_lock_init(&bp->lock);
1100
1101         /* Map in QEC global control registers. */
1102         bp->gregs = of_ioremap(&qec_op->resource[0], 0,
1103                                GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1104         if (!bp->gregs) {
1105                 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1106                 goto fail_and_cleanup;
1107         }
1108
1109         /* Make sure QEC is in BigMAC mode. */
1110         if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1111                 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1112                 goto fail_and_cleanup;
1113         }
1114
1115         /* Reset the QEC. */
1116         if (qec_global_reset(bp->gregs))
1117                 goto fail_and_cleanup;
1118
1119         /* Get supported SBUS burst sizes. */
1120         bsizes = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1121         bsizes_more = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1122
1123         bsizes &= 0xff;
1124         if (bsizes_more != 0xff)
1125                 bsizes &= bsizes_more;
1126         if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1127             (bsizes & DMA_BURST32) == 0)
1128                 bsizes = (DMA_BURST32 - 1);
1129         bp->bigmac_bursts = bsizes;
1130
1131         /* Perform QEC initialization. */
1132         qec_init(bp);
1133
1134         /* Map in the BigMAC channel registers. */
1135         bp->creg = of_ioremap(&op->resource[0], 0,
1136                               CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1137         if (!bp->creg) {
1138                 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1139                 goto fail_and_cleanup;
1140         }
1141
1142         /* Map in the BigMAC control registers. */
1143         bp->bregs = of_ioremap(&op->resource[1], 0,
1144                                BMAC_REG_SIZE, "BigMAC Primary Regs");
1145         if (!bp->bregs) {
1146                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1147                 goto fail_and_cleanup;
1148         }
1149
1150         /* Map in the BigMAC transceiver registers, this is how you poke at
1151          * the BigMAC's PHY.
1152          */
1153         bp->tregs = of_ioremap(&op->resource[2], 0,
1154                                TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1155         if (!bp->tregs) {
1156                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1157                 goto fail_and_cleanup;
1158         }
1159
1160         /* Stop the BigMAC. */
1161         bigmac_stop(bp);
1162
1163         /* Allocate transmit/receive descriptor DVMA block. */
1164         bp->bmac_block = dma_alloc_coherent(&bp->bigmac_op->dev,
1165                                             PAGE_SIZE,
1166                                             &bp->bblock_dvma, GFP_ATOMIC);
1167         if (bp->bmac_block == NULL || bp->bblock_dvma == 0)
1168                 goto fail_and_cleanup;
1169
1170         /* Get the board revision of this BigMAC. */
1171         bp->board_rev = of_getintprop_default(bp->bigmac_op->dev.of_node,
1172                                               "board-version", 1);
1173
1174         /* Init auto-negotiation timer state. */
1175         init_timer(&bp->bigmac_timer);
1176         bp->timer_state = asleep;
1177         bp->timer_ticks = 0;
1178
1179         /* Backlink to generic net device struct. */
1180         bp->dev = dev;
1181
1182         /* Set links to our BigMAC open and close routines. */
1183         dev->ethtool_ops = &bigmac_ethtool_ops;
1184         dev->netdev_ops = &bigmac_ops;
1185         dev->watchdog_timeo = 5*HZ;
1186
1187         /* Finish net device registration. */
1188         dev->irq = bp->bigmac_op->archdata.irqs[0];
1189         dev->dma = 0;
1190
1191         if (register_netdev(dev)) {
1192                 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1193                 goto fail_and_cleanup;
1194         }
1195
1196         dev_set_drvdata(&bp->bigmac_op->dev, bp);
1197
1198         printk(KERN_INFO "%s: BigMAC 100baseT Ethernet %pM\n",
1199                dev->name, dev->dev_addr);
1200
1201         return 0;
1202
1203 fail_and_cleanup:
1204         /* Something went wrong, undo whatever we did so far. */
1205         /* Free register mappings if any. */
1206         if (bp->gregs)
1207                 of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1208         if (bp->creg)
1209                 of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1210         if (bp->bregs)
1211                 of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1212         if (bp->tregs)
1213                 of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1214
1215         if (bp->bmac_block)
1216                 dma_free_coherent(&bp->bigmac_op->dev,
1217                                   PAGE_SIZE,
1218                                   bp->bmac_block,
1219                                   bp->bblock_dvma);
1220
1221         /* This also frees the co-located private data */
1222         free_netdev(dev);
1223         return -ENODEV;
1224 }
1225
1226 /* QEC can be the parent of either QuadEthernet or a BigMAC.  We want
1227  * the latter.
1228  */
1229 static int bigmac_sbus_probe(struct platform_device *op)
1230 {
1231         struct device *parent = op->dev.parent;
1232         struct platform_device *qec_op;
1233
1234         qec_op = to_platform_device(parent);
1235
1236         return bigmac_ether_init(op, qec_op);
1237 }
1238
1239 static int bigmac_sbus_remove(struct platform_device *op)
1240 {
1241         struct bigmac *bp = platform_get_drvdata(op);
1242         struct device *parent = op->dev.parent;
1243         struct net_device *net_dev = bp->dev;
1244         struct platform_device *qec_op;
1245
1246         qec_op = to_platform_device(parent);
1247
1248         unregister_netdev(net_dev);
1249
1250         of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1251         of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1252         of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1253         of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1254         dma_free_coherent(&op->dev,
1255                           PAGE_SIZE,
1256                           bp->bmac_block,
1257                           bp->bblock_dvma);
1258
1259         free_netdev(net_dev);
1260
1261         return 0;
1262 }
1263
1264 static const struct of_device_id bigmac_sbus_match[] = {
1265         {
1266                 .name = "be",
1267         },
1268         {},
1269 };
1270
1271 MODULE_DEVICE_TABLE(of, bigmac_sbus_match);
1272
1273 static struct platform_driver bigmac_sbus_driver = {
1274         .driver = {
1275                 .name = "sunbmac",
1276                 .of_match_table = bigmac_sbus_match,
1277         },
1278         .probe          = bigmac_sbus_probe,
1279         .remove         = bigmac_sbus_remove,
1280 };
1281
1282 module_platform_driver(bigmac_sbus_driver);