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         __u32 bblk_dvma = (__u32)bp->bblock_dvma;
 627         unsigned char *e = &bp->dev->dev_addr[0];
 628
 629         /* Latch current counters into statistics. */
 630         bigmac_get_counters(bp, bregs);
 631
 632         /* Reset QEC. */
 633         qec_global_reset(gregs);
 634
 635         /* Init QEC. */
 636         qec_init(bp);
 637
 638         /* Alloc and reset the tx/rx descriptor chains. */
 639         bigmac_init_rings(bp, from_irq);
 640
 641         /* Initialize the PHY. */
 642         bigmac_tcvr_init(bp);
 643
 644         /* Stop transmitter and receiver. */
 645         bigmac_stop(bp);
 646
 647         /* Set hardware ethernet address. */
 648         sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
 649         sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
 650         sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
 651
 652         /* Clear the hash table until mc upload occurs. */
 653         sbus_writel(0, bregs + BMAC_HTABLE3);
 654         sbus_writel(0, bregs + BMAC_HTABLE2);
 655         sbus_writel(0, bregs + BMAC_HTABLE1);
 656         sbus_writel(0, bregs + BMAC_HTABLE0);
 657
 658         /* Enable Big Mac hash table filter. */
 659         sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
 660                     bregs + BMAC_RXCFG);
 661         udelay(20);
 662
 663         /* Ok, configure the Big Mac transmitter. */
 664         sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
 665
 666         /* The HME docs recommend to use the 10LSB of our MAC here. */
 667         sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
 668                     bregs + BMAC_RSEED);
 669
 670         /* Enable the output drivers no matter what. */
 671         sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
 672                     bregs + BMAC_XIFCFG);
 673
 674         /* Tell the QEC where the ring descriptors are. */
 675         sbus_writel(bblk_dvma + bib_offset(be_rxd, 0),
 676                     cregs + CREG_RXDS);
 677         sbus_writel(bblk_dvma + bib_offset(be_txd, 0),
 678                     cregs + CREG_TXDS);
 679
 680         /* Setup the FIFO pointers into QEC local memory. */
 681         sbus_writel(0, cregs + CREG_RXRBUFPTR);
 682         sbus_writel(0, cregs + CREG_RXWBUFPTR);
 683         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 684                     cregs + CREG_TXRBUFPTR);
 685         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 686                     cregs + CREG_TXWBUFPTR);
 687
 688         /* Tell bigmac what interrupts we don't want to hear about. */
 689         sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
 690                     bregs + BMAC_IMASK);
 691
 692         /* Enable the various other irq's. */
 693         sbus_writel(0, cregs + CREG_RIMASK);
 694         sbus_writel(0, cregs + CREG_TIMASK);
 695         sbus_writel(0, cregs + CREG_QMASK);
 696         sbus_writel(0, cregs + CREG_BMASK);
 697
 698         /* Set jam size to a reasonable default. */
 699         sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
 700
 701         /* Clear collision counter. */
 702         sbus_writel(0, cregs + CREG_CCNT);
 703
 704         /* Enable transmitter and receiver. */
 705         sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
 706                     bregs + BMAC_TXCFG);
 707         sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
 708                     bregs + BMAC_RXCFG);
 709
 710         /* Ok, start detecting link speed/duplex. */
 711         bigmac_begin_auto_negotiation(bp);
 712
 713         /* Success. */
 714         return 0;
 715 }
 716
 717 /* Error interrupts get sent here. */
 718 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
 719 {
 720         printk(KERN_ERR "bigmac_is_medium_rare: ");
 721         if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
 722                 if (qec_status & GLOB_STAT_ER)
 723                         printk("QEC_ERROR, ");
 724                 if (qec_status & GLOB_STAT_BM)
 725                         printk("QEC_BMAC_ERROR, ");
 726         }
 727         if (bmac_status & CREG_STAT_ERRORS) {
 728                 if (bmac_status & CREG_STAT_BERROR)
 729                         printk("BMAC_ERROR, ");
 730                 if (bmac_status & CREG_STAT_TXDERROR)
 731                         printk("TXD_ERROR, ");
 732                 if (bmac_status & CREG_STAT_TXLERR)
 733                         printk("TX_LATE_ERROR, ");
 734                 if (bmac_status & CREG_STAT_TXPERR)
 735                         printk("TX_PARITY_ERROR, ");
 736                 if (bmac_status & CREG_STAT_TXSERR)
 737                         printk("TX_SBUS_ERROR, ");
 738
 739                 if (bmac_status & CREG_STAT_RXDROP)
 740                         printk("RX_DROP_ERROR, ");
 741
 742                 if (bmac_status & CREG_STAT_RXSMALL)
 743                         printk("RX_SMALL_ERROR, ");
 744                 if (bmac_status & CREG_STAT_RXLERR)
 745                         printk("RX_LATE_ERROR, ");
 746                 if (bmac_status & CREG_STAT_RXPERR)
 747                         printk("RX_PARITY_ERROR, ");
 748                 if (bmac_status & CREG_STAT_RXSERR)
 749                         printk("RX_SBUS_ERROR, ");
 750         }
 751
 752         printk(" RESET\n");
 753         bigmac_init_hw(bp, 1);
 754 }
 755
 756 /* BigMAC transmit complete service routines. */
 757 static void bigmac_tx(struct bigmac *bp)
 758 {
 759         struct be_txd *txbase = &bp->bmac_block->be_txd[0];
 760         struct net_device *dev = bp->dev;
 761         int elem;
 762
 763         spin_lock(&bp->lock);
 764
 765         elem = bp->tx_old;
 766         DTX(("bigmac_tx: tx_old[%d] ", elem));
 767         while (elem != bp->tx_new) {
 768                 struct sk_buff *skb;
 769                 struct be_txd *this = &txbase[elem];
 770
 771                 DTX(("this(%p) [flags(%08x)addr(%08x)]",
 772                      this, this->tx_flags, this->tx_addr));
 773
 774                 if (this->tx_flags & TXD_OWN)
 775                         break;
 776                 skb = bp->tx_skbs[elem];
 777                 bp->enet_stats.tx_packets++;
 778                 bp->enet_stats.tx_bytes += skb->len;
 779                 dma_unmap_single(&bp->bigmac_op->dev,
 780                                  this->tx_addr, skb->len,
 781                                  DMA_TO_DEVICE);
 782
 783                 DTX(("skb(%p) ", skb));
 784                 bp->tx_skbs[elem] = NULL;
 785                 dev_kfree_skb_irq(skb);
 786
 787                 elem = NEXT_TX(elem);
 788         }
 789         DTX((" DONE, tx_old=%d\n", elem));
 790         bp->tx_old = elem;
 791
 792         if (netif_queue_stopped(dev) &&
 793             TX_BUFFS_AVAIL(bp) > 0)
 794                 netif_wake_queue(bp->dev);
 795
 796         spin_unlock(&bp->lock);
 797 }
 798
 799 /* BigMAC receive complete service routines. */
 800 static void bigmac_rx(struct bigmac *bp)
 801 {
 802         struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
 803         struct be_rxd *this;
 804         int elem = bp->rx_new, drops = 0;
 805         u32 flags;
 806
 807         this = &rxbase[elem];
 808         while (!((flags = this->rx_flags) & RXD_OWN)) {
 809                 struct sk_buff *skb;
 810                 int len = (flags & RXD_LENGTH); /* FCS not included */
 811
 812                 /* Check for errors. */
 813                 if (len < ETH_ZLEN) {
 814                         bp->enet_stats.rx_errors++;
 815                         bp->enet_stats.rx_length_errors++;
 816
 817         drop_it:
 818                         /* Return it to the BigMAC. */
 819                         bp->enet_stats.rx_dropped++;
 820                         this->rx_flags =
 821                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 822                         goto next;
 823                 }
 824                 skb = bp->rx_skbs[elem];
 825                 if (len > RX_COPY_THRESHOLD) {
 826                         struct sk_buff *new_skb;
 827
 828                         /* Now refill the entry, if we can. */
 829                         new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 830                         if (new_skb == NULL) {
 831                                 drops++;
 832                                 goto drop_it;
 833                         }
 834                         dma_unmap_single(&bp->bigmac_op->dev,
 835                                          this->rx_addr,
 836                                          RX_BUF_ALLOC_SIZE - 34,
 837                                          DMA_FROM_DEVICE);
 838                         bp->rx_skbs[elem] = new_skb;
 839                         skb_put(new_skb, ETH_FRAME_LEN);
 840                         skb_reserve(new_skb, 34);
 841                         this->rx_addr =
 842                                 dma_map_single(&bp->bigmac_op->dev,
 843                                                new_skb->data,
 844                                                RX_BUF_ALLOC_SIZE - 34,
 845                                                DMA_FROM_DEVICE);
 846                         this->rx_flags =
 847                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 848
 849                         /* Trim the original skb for the netif. */
 850                         skb_trim(skb, len);
 851                 } else {
 852                         struct sk_buff *copy_skb = netdev_alloc_skb(bp->dev, len + 2);
 853
 854                         if (copy_skb == NULL) {
 855                                 drops++;
 856                                 goto drop_it;
 857                         }
 858                         skb_reserve(copy_skb, 2);
 859                         skb_put(copy_skb, len);
 860                         dma_sync_single_for_cpu(&bp->bigmac_op->dev,
 861                                                 this->rx_addr, len,
 862                                                 DMA_FROM_DEVICE);
 863                         skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len);
 864                         dma_sync_single_for_device(&bp->bigmac_op->dev,
 865                                                    this->rx_addr, len,
 866                                                    DMA_FROM_DEVICE);
 867
 868                         /* Reuse original ring buffer. */
 869                         this->rx_flags =
 870                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 871
 872                         skb = copy_skb;
 873                 }
 874
 875                 /* No checksums done by the BigMAC ;-( */
 876                 skb->protocol = eth_type_trans(skb, bp->dev);
 877                 netif_rx(skb);
 878                 bp->enet_stats.rx_packets++;
 879                 bp->enet_stats.rx_bytes += len;
 880         next:
 881                 elem = NEXT_RX(elem);
 882                 this = &rxbase[elem];
 883         }
 884         bp->rx_new = elem;
 885         if (drops)
 886                 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
 887 }
 888
 889 static irqreturn_t bigmac_interrupt(int irq, void *dev_id)
 890 {
 891         struct bigmac *bp = (struct bigmac *) dev_id;
 892         u32 qec_status, bmac_status;
 893
 894         DIRQ(("bigmac_interrupt: "));
 895
 896         /* Latch status registers now. */
 897         bmac_status = sbus_readl(bp->creg + CREG_STAT);
 898         qec_status = sbus_readl(bp->gregs + GLOB_STAT);
 899
 900         DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
 901         if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
 902            (bmac_status & CREG_STAT_ERRORS))
 903                 bigmac_is_medium_rare(bp, qec_status, bmac_status);
 904
 905         if (bmac_status & CREG_STAT_TXIRQ)
 906                 bigmac_tx(bp);
 907
 908         if (bmac_status & CREG_STAT_RXIRQ)
 909                 bigmac_rx(bp);
 910
 911         return IRQ_HANDLED;
 912 }
 913
 914 static int bigmac_open(struct net_device *dev)
 915 {
 916         struct bigmac *bp = netdev_priv(dev);
 917         int ret;
 918
 919         ret = request_irq(dev->irq, bigmac_interrupt, IRQF_SHARED, dev->name, bp);
 920         if (ret) {
 921                 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
 922                 return ret;
 923         }
 924         init_timer(&bp->bigmac_timer);
 925         ret = bigmac_init_hw(bp, 0);
 926         if (ret)
 927                 free_irq(dev->irq, bp);
 928         return ret;
 929 }
 930
 931 static int bigmac_close(struct net_device *dev)
 932 {
 933         struct bigmac *bp = netdev_priv(dev);
 934
 935         del_timer(&bp->bigmac_timer);
 936         bp->timer_state = asleep;
 937         bp->timer_ticks = 0;
 938
 939         bigmac_stop(bp);
 940         bigmac_clean_rings(bp);
 941         free_irq(dev->irq, bp);
 942         return 0;
 943 }
 944
 945 static void bigmac_tx_timeout(struct net_device *dev)
 946 {
 947         struct bigmac *bp = netdev_priv(dev);
 948
 949         bigmac_init_hw(bp, 0);
 950         netif_wake_queue(dev);
 951 }
 952
 953 /* Put a packet on the wire. */
 954 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 955 {
 956         struct bigmac *bp = netdev_priv(dev);
 957         int len, entry;
 958         u32 mapping;
 959
 960         len = skb->len;
 961         mapping = dma_map_single(&bp->bigmac_op->dev, skb->data,
 962                                  len, DMA_TO_DEVICE);
 963
 964         /* Avoid a race... */
 965         spin_lock_irq(&bp->lock);
 966         entry = bp->tx_new;
 967         DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
 968         bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
 969         bp->tx_skbs[entry] = skb;
 970         bp->bmac_block->be_txd[entry].tx_addr = mapping;
 971         bp->bmac_block->be_txd[entry].tx_flags =
 972                 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
 973         bp->tx_new = NEXT_TX(entry);
 974         if (TX_BUFFS_AVAIL(bp) <= 0)
 975                 netif_stop_queue(dev);
 976         spin_unlock_irq(&bp->lock);
 977
 978         /* Get it going. */
 979         sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
 980
 981
 982         return NETDEV_TX_OK;
 983 }
 984
 985 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
 986 {
 987         struct bigmac *bp = netdev_priv(dev);
 988
 989         bigmac_get_counters(bp, bp->bregs);
 990         return &bp->enet_stats;
 991 }
 992
 993 static void bigmac_set_multicast(struct net_device *dev)
 994 {
 995         struct bigmac *bp = netdev_priv(dev);
 996         void __iomem *bregs = bp->bregs;
 997         struct netdev_hw_addr *ha;
 998         u32 tmp, crc;
 999
1000         /* Disable the receiver.  The bit self-clears when
1001          * the operation is complete.
1002          */
1003         tmp = sbus_readl(bregs + BMAC_RXCFG);
1004         tmp &= ~(BIGMAC_RXCFG_ENABLE);
1005         sbus_writel(tmp, bregs + BMAC_RXCFG);
1006         while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1007                 udelay(20);
1008
1009         if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
1010                 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1011                 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1012                 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1013                 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1014         } else if (dev->flags & IFF_PROMISC) {
1015                 tmp = sbus_readl(bregs + BMAC_RXCFG);
1016                 tmp |= BIGMAC_RXCFG_PMISC;
1017                 sbus_writel(tmp, bregs + BMAC_RXCFG);
1018         } else {
1019                 u16 hash_table[4] = { 0 };
1020
1021                 netdev_for_each_mc_addr(ha, dev) {
1022                         crc = ether_crc_le(6, ha->addr);
1023                         crc >>= 26;
1024                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1025                 }
1026                 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1027                 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1028                 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1029                 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1030         }
1031
1032         /* Re-enable the receiver. */
1033         tmp = sbus_readl(bregs + BMAC_RXCFG);
1034         tmp |= BIGMAC_RXCFG_ENABLE;
1035         sbus_writel(tmp, bregs + BMAC_RXCFG);
1036 }
1037
1038 /* Ethtool support... */
1039 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1040 {
1041         strlcpy(info->driver, "sunbmac", sizeof(info->driver));
1042         strlcpy(info->version, "2.0", sizeof(info->version));
1043 }
1044
1045 static u32 bigmac_get_link(struct net_device *dev)
1046 {
1047         struct bigmac *bp = netdev_priv(dev);
1048
1049         spin_lock_irq(&bp->lock);
1050         bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, MII_BMSR);
1051         spin_unlock_irq(&bp->lock);
1052
1053         return (bp->sw_bmsr & BMSR_LSTATUS);
1054 }
1055
1056 static const struct ethtool_ops bigmac_ethtool_ops = {
1057         .get_drvinfo            = bigmac_get_drvinfo,
1058         .get_link               = bigmac_get_link,
1059 };
1060
1061 static const struct net_device_ops bigmac_ops = {
1062         .ndo_open               = bigmac_open,
1063         .ndo_stop               = bigmac_close,
1064         .ndo_start_xmit         = bigmac_start_xmit,
1065         .ndo_get_stats          = bigmac_get_stats,
1066         .ndo_set_rx_mode        = bigmac_set_multicast,
1067         .ndo_tx_timeout         = bigmac_tx_timeout,
1068         .ndo_change_mtu         = eth_change_mtu,
1069         .ndo_set_mac_address    = eth_mac_addr,
1070         .ndo_validate_addr      = eth_validate_addr,
1071 };
1072
1073 static int bigmac_ether_init(struct platform_device *op,
1074                              struct platform_device *qec_op)
1075 {
1076         static int version_printed;
1077         struct net_device *dev;
1078         u8 bsizes, bsizes_more;
1079         struct bigmac *bp;
1080         int i;
1081
1082         /* Get a new device struct for this interface. */
1083         dev = alloc_etherdev(sizeof(struct bigmac));
1084         if (!dev)
1085                 return -ENOMEM;
1086
1087         if (version_printed++ == 0)
1088                 printk(KERN_INFO "%s", version);
1089
1090         for (i = 0; i < 6; i++)
1091                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1092
1093         /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1094         bp = netdev_priv(dev);
1095         bp->qec_op = qec_op;
1096         bp->bigmac_op = op;
1097
1098         SET_NETDEV_DEV(dev, &op->dev);
1099
1100         spin_lock_init(&bp->lock);
1101
1102         /* Map in QEC global control registers. */
1103         bp->gregs = of_ioremap(&qec_op->resource[0], 0,
1104                                GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1105         if (!bp->gregs) {
1106                 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1107                 goto fail_and_cleanup;
1108         }
1109
1110         /* Make sure QEC is in BigMAC mode. */
1111         if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1112                 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1113                 goto fail_and_cleanup;
1114         }
1115
1116         /* Reset the QEC. */
1117         if (qec_global_reset(bp->gregs))
1118                 goto fail_and_cleanup;
1119
1120         /* Get supported SBUS burst sizes. */
1121         bsizes = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1122         bsizes_more = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff);
1123
1124         bsizes &= 0xff;
1125         if (bsizes_more != 0xff)
1126                 bsizes &= bsizes_more;
1127         if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1128             (bsizes & DMA_BURST32) == 0)
1129                 bsizes = (DMA_BURST32 - 1);
1130         bp->bigmac_bursts = bsizes;
1131
1132         /* Perform QEC initialization. */
1133         qec_init(bp);
1134
1135         /* Map in the BigMAC channel registers. */
1136         bp->creg = of_ioremap(&op->resource[0], 0,
1137                               CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1138         if (!bp->creg) {
1139                 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1140                 goto fail_and_cleanup;
1141         }
1142
1143         /* Map in the BigMAC control registers. */
1144         bp->bregs = of_ioremap(&op->resource[1], 0,
1145                                BMAC_REG_SIZE, "BigMAC Primary Regs");
1146         if (!bp->bregs) {
1147                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1148                 goto fail_and_cleanup;
1149         }
1150
1151         /* Map in the BigMAC transceiver registers, this is how you poke at
1152          * the BigMAC's PHY.
1153          */
1154         bp->tregs = of_ioremap(&op->resource[2], 0,
1155                                TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1156         if (!bp->tregs) {
1157                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1158                 goto fail_and_cleanup;
1159         }
1160
1161         /* Stop the BigMAC. */
1162         bigmac_stop(bp);
1163
1164         /* Allocate transmit/receive descriptor DVMA block. */
1165         bp->bmac_block = dma_alloc_coherent(&bp->bigmac_op->dev,
1166                                             PAGE_SIZE,
1167                                             &bp->bblock_dvma, GFP_ATOMIC);
1168         if (bp->bmac_block == NULL || bp->bblock_dvma == 0)
1169                 goto fail_and_cleanup;
1170
1171         /* Get the board revision of this BigMAC. */
1172         bp->board_rev = of_getintprop_default(bp->bigmac_op->dev.of_node,
1173                                               "board-version", 1);
1174
1175         /* Init auto-negotiation timer state. */
1176         init_timer(&bp->bigmac_timer);
1177         bp->timer_state = asleep;
1178         bp->timer_ticks = 0;
1179
1180         /* Backlink to generic net device struct. */
1181         bp->dev = dev;
1182
1183         /* Set links to our BigMAC open and close routines. */
1184         dev->ethtool_ops = &bigmac_ethtool_ops;
1185         dev->netdev_ops = &bigmac_ops;
1186         dev->watchdog_timeo = 5*HZ;
1187
1188         /* Finish net device registration. */
1189         dev->irq = bp->bigmac_op->archdata.irqs[0];
1190         dev->dma = 0;
1191
1192         if (register_netdev(dev)) {
1193                 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1194                 goto fail_and_cleanup;
1195         }
1196
1197         dev_set_drvdata(&bp->bigmac_op->dev, bp);
1198
1199         printk(KERN_INFO "%s: BigMAC 100baseT Ethernet %pM\n",
1200                dev->name, dev->dev_addr);
1201
1202         return 0;
1203
1204 fail_and_cleanup:
1205         /* Something went wrong, undo whatever we did so far. */
1206         /* Free register mappings if any. */
1207         if (bp->gregs)
1208                 of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1209         if (bp->creg)
1210                 of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1211         if (bp->bregs)
1212                 of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1213         if (bp->tregs)
1214                 of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1215
1216         if (bp->bmac_block)
1217                 dma_free_coherent(&bp->bigmac_op->dev,
1218                                   PAGE_SIZE,
1219                                   bp->bmac_block,
1220                                   bp->bblock_dvma);
1221
1222         /* This also frees the co-located private data */
1223         free_netdev(dev);
1224         return -ENODEV;
1225 }
1226
1227 /* QEC can be the parent of either QuadEthernet or a BigMAC.  We want
1228  * the latter.
1229  */
1230 static int bigmac_sbus_probe(struct platform_device *op)
1231 {
1232         struct device *parent = op->dev.parent;
1233         struct platform_device *qec_op;
1234
1235         qec_op = to_platform_device(parent);
1236
1237         return bigmac_ether_init(op, qec_op);
1238 }
1239
1240 static int bigmac_sbus_remove(struct platform_device *op)
1241 {
1242         struct bigmac *bp = platform_get_drvdata(op);
1243         struct device *parent = op->dev.parent;
1244         struct net_device *net_dev = bp->dev;
1245         struct platform_device *qec_op;
1246
1247         qec_op = to_platform_device(parent);
1248
1249         unregister_netdev(net_dev);
1250
1251         of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1252         of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1253         of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1254         of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1255         dma_free_coherent(&op->dev,
1256                           PAGE_SIZE,
1257                           bp->bmac_block,
1258                           bp->bblock_dvma);
1259
1260         free_netdev(net_dev);
1261
1262         return 0;
1263 }
1264
1265 static const struct of_device_id bigmac_sbus_match[] = {
1266         {
1267                 .name = "be",
1268         },
1269         {},
1270 };
1271
1272 MODULE_DEVICE_TABLE(of, bigmac_sbus_match);
1273
1274 static struct platform_driver bigmac_sbus_driver = {
1275         .driver = {
1276                 .name = "sunbmac",
1277                 .of_match_table = bigmac_sbus_match,
1278         },
1279         .probe          = bigmac_sbus_probe,
1280         .remove         = bigmac_sbus_remove,
1281 };
1282
1283 module_platform_driver(bigmac_sbus_driver);