drivers/net/ethernet/sun/sunbmac.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
   3  *
   4  * Copyright (C) 1997, 1998, 1999, 2003, 2008 David S. Miller (davem@davemloft.net)
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/pgtable.h>
   9
  10 #include <linux/kernel.h>
  11 #include <linux/types.h>
  12 #include <linux/fcntl.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/ioport.h>
  15 #include <linux/in.h>
  16 #include <linux/string.h>
  17 #include <linux/delay.h>
  18 #include <linux/crc32.h>
  19 #include <linux/errno.h>
  20 #include <linux/ethtool.h>
  21 #include <linux/mii.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/bitops.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/of.h>
  28 #include <linux/of_device.h>
  29 #include <linux/gfp.h>
  30
  31 #include <asm/auxio.h>
  32 #include <asm/byteorder.h>
  33 #include <asm/dma.h>
  34 #include <asm/idprom.h>
  35 #include <asm/io.h>
  36 #include <asm/openprom.h>
  37 #include <asm/oplib.h>
  38
  39 #include "sunbmac.h"
  40
  41 #define DRV_NAME        "sunbmac"
  42 #define DRV_VERSION     "2.1"
  43 #define DRV_RELDATE     "August 26, 2008"
  44 #define DRV_AUTHOR      "David S. Miller (davem@davemloft.net)"
  45
  46 static char version[] =
  47         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
  48
  49 MODULE_VERSION(DRV_VERSION);
  50 MODULE_AUTHOR(DRV_AUTHOR);
  51 MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
  52 MODULE_LICENSE("GPL");
  53
  54 #undef DEBUG_PROBE
  55 #undef DEBUG_TX
  56 #undef DEBUG_IRQ
  57
  58 #ifdef DEBUG_PROBE
  59 #define DP(x)  printk x
  60 #else
  61 #define DP(x)
  62 #endif
  63
  64 #ifdef DEBUG_TX
  65 #define DTX(x)  printk x
  66 #else
  67 #define DTX(x)
  68 #endif
  69
  70 #ifdef DEBUG_IRQ
  71 #define DIRQ(x)  printk x
  72 #else
  73 #define DIRQ(x)
  74 #endif
  75
  76 #define DEFAULT_JAMSIZE    4 /* Toe jam */
  77
  78 #define QEC_RESET_TRIES 200
  79
  80 static int qec_global_reset(void __iomem *gregs)
  81 {
  82         int tries = QEC_RESET_TRIES;
  83
  84         sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
  85         while (--tries) {
  86                 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
  87                         udelay(20);
  88                         continue;
  89                 }
  90                 break;
  91         }
  92         if (tries)
  93                 return 0;
  94         printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
  95         return -1;
  96 }
  97
  98 static void qec_init(struct bigmac *bp)
  99 {
 100         struct platform_device *qec_op = bp->qec_op;
 101         void __iomem *gregs = bp->gregs;
 102         u8 bsizes = bp->bigmac_bursts;
 103         u32 regval;
 104
 105         /* 64byte bursts do not work at the moment, do
 106          * not even try to enable them.  -DaveM
 107          */
 108         if (bsizes & DMA_BURST32)
 109                 regval = GLOB_CTRL_B32;
 110         else
 111                 regval = GLOB_CTRL_B16;
 112         sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
 113         sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
 114
 115         /* All of memsize is given to bigmac. */
 116         sbus_writel(resource_size(&qec_op->resource[1]),
 117                     gregs + GLOB_MSIZE);
 118
 119         /* Half to the transmitter, half to the receiver. */
 120         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 121                     gregs + GLOB_TSIZE);
 122         sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
 123                     gregs + GLOB_RSIZE);
 124 }
 125
 126 #define TX_RESET_TRIES     32
 127 #define RX_RESET_TRIES     32
 128
 129 static void bigmac_tx_reset(void __iomem *bregs)
 130 {
 131         int tries = TX_RESET_TRIES;
 132
 133         sbus_writel(0, bregs + BMAC_TXCFG);
 134
 135         /* The fifo threshold bit is read-only and does
 136          * not clear.  -DaveM
 137          */
 138         while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
 139                --tries != 0)
 140                 udelay(20);
 141
 142         if (!tries) {
 143                 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
 144                 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
 145                        sbus_readl(bregs + BMAC_TXCFG));
 146         }
 147 }
 148
 149 static void bigmac_rx_reset(void __iomem *bregs)
 150 {
 151         int tries = RX_RESET_TRIES;
 152
 153         sbus_writel(0, bregs + BMAC_RXCFG);
 154         while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
 155                 udelay(20);
 156
 157         if (!tries) {
 158                 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
 159                 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
 160                        sbus_readl(bregs + BMAC_RXCFG));
 161         }
 162 }
 163
 164 /* Reset the transmitter and receiver. */
 165 static void bigmac_stop(struct bigmac *bp)
 166 {
 167         bigmac_tx_reset(bp->bregs);
 168         bigmac_rx_reset(bp->bregs);
 169 }
 170
 171 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
 172 {
 173         struct net_device_stats *stats = &bp->dev->stats;
 174
 175         stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
 176         sbus_writel(0, bregs + BMAC_RCRCECTR);
 177
 178         stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
 179         sbus_writel(0, bregs + BMAC_UNALECTR);
 180
 181         stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
 182         sbus_writel(0, bregs + BMAC_GLECTR);
 183
 184         stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
 185
 186         stats->collisions +=
 187                 (sbus_readl(bregs + BMAC_EXCTR) +
 188                  sbus_readl(bregs + BMAC_LTCTR));
 189         sbus_writel(0, bregs + BMAC_EXCTR);
 190         sbus_writel(0, bregs + BMAC_LTCTR);
 191 }
 192
 193 static void bigmac_clean_rings(struct bigmac *bp)
 194 {
 195         int i;
 196
 197         for (i = 0; i < RX_RING_SIZE; i++) {
 198                 if (bp->rx_skbs[i] != NULL) {
 199                         dev_kfree_skb_any(bp->rx_skbs[i]);
 200                         bp->rx_skbs[i] = NULL;
 201                 }
 202         }
 203
 204         for (i = 0; i < TX_RING_SIZE; i++) {
 205                 if (bp->tx_skbs[i] != NULL) {
 206                         dev_kfree_skb_any(bp->tx_skbs[i]);
 207                         bp->tx_skbs[i] = NULL;
 208                 }
 209         }
 210 }
 211
 212 static void bigmac_init_rings(struct bigmac *bp, bool non_blocking)
 213 {
 214         struct bmac_init_block *bb = bp->bmac_block;
 215         int i;
 216         gfp_t gfp_flags = GFP_KERNEL;
 217
 218         if (non_blocking)
 219                 gfp_flags = GFP_ATOMIC;
 220
 221         bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
 222
 223         /* Free any skippy bufs left around in the rings. */
 224         bigmac_clean_rings(bp);
 225
 226         /* Now get new skbufs for the receive ring. */
 227         for (i = 0; i < RX_RING_SIZE; i++) {
 228                 struct sk_buff *skb;
 229
 230                 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
 231                 if (!skb)
 232                         continue;
 233
 234                 bp->rx_skbs[i] = skb;
 235
 236                 /* Because we reserve afterwards. */
 237                 skb_put(skb, ETH_FRAME_LEN);
 238                 skb_reserve(skb, 34);
 239
 240                 bb->be_rxd[i].rx_addr =
 241                         dma_map_single(&bp->bigmac_op->dev,
 242                                        skb->data,
 243                                        RX_BUF_ALLOC_SIZE - 34,
 244                                        DMA_FROM_DEVICE);
 245                 bb->be_rxd[i].rx_flags =
 246                         (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 247         }
 248
 249         for (i = 0; i < TX_RING_SIZE; i++)
 250                 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
 251 }
 252
 253 #define MGMT_CLKON  (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
 254 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
 255
 256 static void idle_transceiver(void __iomem *tregs)
 257 {
 258         int i = 20;
 259
 260         while (i--) {
 261                 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
 262                 sbus_readl(tregs + TCVR_MPAL);
 263                 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
 264                 sbus_readl(tregs + TCVR_MPAL);
 265         }
 266 }
 267
 268 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
 269 {
 270         if (bp->tcvr_type == internal) {
 271                 bit = (bit & 1) << 3;
 272                 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
 273                             tregs + TCVR_MPAL);
 274                 sbus_readl(tregs + TCVR_MPAL);
 275                 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 276                             tregs + TCVR_MPAL);
 277                 sbus_readl(tregs + TCVR_MPAL);
 278         } else if (bp->tcvr_type == external) {
 279                 bit = (bit & 1) << 2;
 280                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
 281                             tregs + TCVR_MPAL);
 282                 sbus_readl(tregs + TCVR_MPAL);
 283                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
 284                             tregs + TCVR_MPAL);
 285                 sbus_readl(tregs + TCVR_MPAL);
 286         } else {
 287                 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
 288         }
 289 }
 290
 291 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
 292 {
 293         int retval = 0;
 294
 295         if (bp->tcvr_type == internal) {
 296                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 297                 sbus_readl(tregs + TCVR_MPAL);
 298                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 299                             tregs + TCVR_MPAL);
 300                 sbus_readl(tregs + TCVR_MPAL);
 301                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 302         } else if (bp->tcvr_type == external) {
 303                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 304                 sbus_readl(tregs + TCVR_MPAL);
 305                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 306                 sbus_readl(tregs + TCVR_MPAL);
 307                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 308         } else {
 309                 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
 310         }
 311         return retval;
 312 }
 313
 314 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
 315 {
 316         int retval = 0;
 317
 318         if (bp->tcvr_type == internal) {
 319                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 320                 sbus_readl(tregs + TCVR_MPAL);
 321                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 322                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 323                 sbus_readl(tregs + TCVR_MPAL);
 324         } else if (bp->tcvr_type == external) {
 325                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 326                 sbus_readl(tregs + TCVR_MPAL);
 327                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 328                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 329                 sbus_readl(tregs + TCVR_MPAL);
 330         } else {
 331                 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
 332         }
 333         return retval;
 334 }
 335
 336 static void put_tcvr_byte(struct bigmac *bp,
 337                           void __iomem *tregs,
 338                           unsigned int byte)
 339 {
 340         int shift = 4;
 341
 342         do {
 343                 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
 344                 shift -= 1;
 345         } while (shift >= 0);
 346 }
 347
 348 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
 349                               int reg, unsigned short val)
 350 {
 351         int shift;
 352
 353         reg &= 0xff;
 354         val &= 0xffff;
 355         switch(bp->tcvr_type) {
 356         case internal:
 357         case external:
 358                 break;
 359
 360         default:
 361                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 362                 return;
 363         }
 364
 365         idle_transceiver(tregs);
 366         write_tcvr_bit(bp, tregs, 0);
 367         write_tcvr_bit(bp, tregs, 1);
 368         write_tcvr_bit(bp, tregs, 0);
 369         write_tcvr_bit(bp, tregs, 1);
 370
 371         put_tcvr_byte(bp, tregs,
 372                       ((bp->tcvr_type == internal) ?
 373                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 374
 375         put_tcvr_byte(bp, tregs, reg);
 376
 377         write_tcvr_bit(bp, tregs, 1);
 378         write_tcvr_bit(bp, tregs, 0);
 379
 380         shift = 15;
 381         do {
 382                 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
 383                 shift -= 1;
 384         } while (shift >= 0);
 385 }
 386
 387 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
 388                                        void __iomem *tregs,
 389                                        int reg)
 390 {
 391         unsigned short retval = 0;
 392
 393         reg &= 0xff;
 394         switch(bp->tcvr_type) {
 395         case internal:
 396         case external:
 397                 break;
 398
 399         default:
 400                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 401                 return 0xffff;
 402         }
 403
 404         idle_transceiver(tregs);
 405         write_tcvr_bit(bp, tregs, 0);
 406         write_tcvr_bit(bp, tregs, 1);
 407         write_tcvr_bit(bp, tregs, 1);
 408         write_tcvr_bit(bp, tregs, 0);
 409
 410         put_tcvr_byte(bp, tregs,
 411                       ((bp->tcvr_type == internal) ?
 412                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 413
 414         put_tcvr_byte(bp, tregs, reg);
 415
 416         if (bp->tcvr_type == external) {
 417                 int shift = 15;
 418
 419                 (void) read_tcvr_bit2(bp, tregs);
 420                 (void) read_tcvr_bit2(bp, tregs);
 421
 422                 do {
 423                         int tmp;
 424
 425                         tmp = read_tcvr_bit2(bp, tregs);
 426                         retval |= ((tmp & 1) << shift);
 427                         shift -= 1;
 428                 } while (shift >= 0);
 429
 430                 (void) read_tcvr_bit2(bp, tregs);
 431                 (void) read_tcvr_bit2(bp, tregs);
 432                 (void) read_tcvr_bit2(bp, tregs);
 433         } else {
 434                 int shift = 15;
 435
 436                 (void) read_tcvr_bit(bp, tregs);
 437                 (void) read_tcvr_bit(bp, tregs);
 438
 439                 do {
 440                         int tmp;
 441
 442                         tmp = read_tcvr_bit(bp, tregs);
 443                         retval |= ((tmp & 1) << shift);
 444                         shift -= 1;
 445                 } while (shift >= 0);
 446
 447                 (void) read_tcvr_bit(bp, tregs);
 448                 (void) read_tcvr_bit(bp, tregs);
 449                 (void) read_tcvr_bit(bp, tregs);
 450         }
 451         return retval;
 452 }
 453
 454 static void bigmac_tcvr_init(struct bigmac *bp)
 455 {
 456         void __iomem *tregs = bp->tregs;
 457         u32 mpal;
 458
 459         idle_transceiver(tregs);
 460         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 461                     tregs + TCVR_MPAL);
 462         sbus_readl(tregs + TCVR_MPAL);
 463
 464         /* Only the bit for the present transceiver (internal or
 465          * external) will stick, set them both and see what stays.
 466          */
 467         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 468         sbus_readl(tregs + TCVR_MPAL);
 469         udelay(20);
 470
 471         mpal = sbus_readl(tregs + TCVR_MPAL);
 472         if (mpal & MGMT_PAL_EXT_MDIO) {
 473                 bp->tcvr_type = external;
 474                 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 475                             tregs + TCVR_TPAL);
 476                 sbus_readl(tregs + TCVR_TPAL);
 477         } else if (mpal & MGMT_PAL_INT_MDIO) {
 478                 bp->tcvr_type = internal;
 479                 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
 480                               TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 481                             tregs + TCVR_TPAL);
 482                 sbus_readl(tregs + TCVR_TPAL);
 483         } else {
 484                 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
 485                        "external MDIO available!\n");
 486                 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
 487                        sbus_readl(tregs + TCVR_MPAL),
 488                        sbus_readl(tregs + TCVR_TPAL));
 489         }
 490 }
 491
 492 static int bigmac_init_hw(struct bigmac *, bool);
 493
 494 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
 495 {
 496         if (bp->sw_bmcr & BMCR_SPEED100) {
 497                 int timeout;
 498
 499                 /* Reset the PHY. */
 500                 bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 501                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 502                 bp->sw_bmcr     = (BMCR_RESET);
 503                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 504
 505                 timeout = 64;
 506                 while (--timeout) {
 507                         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 508                         if ((bp->sw_bmcr & BMCR_RESET) == 0)
 509                                 break;
 510                         udelay(20);
 511                 }
 512                 if (timeout == 0)
 513                         printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 514
 515                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 516
 517                 /* Now we try 10baseT. */
 518                 bp->sw_bmcr &= ~(BMCR_SPEED100);
 519                 bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 520                 return 0;
 521         }
 522
 523         /* We've tried them all. */
 524         return -1;
 525 }
 526
 527 static void bigmac_timer(struct timer_list *t)
 528 {
 529         struct bigmac *bp = from_timer(bp, t, bigmac_timer);
 530         void __iomem *tregs = bp->tregs;
 531         int restart_timer = 0;
 532
 533         bp->timer_ticks++;
 534         if (bp->timer_state == ltrywait) {
 535                 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, MII_BMSR);
 536                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 537                 if (bp->sw_bmsr & BMSR_LSTATUS) {
 538                         printk(KERN_INFO "%s: Link is now up at %s.\n",
 539                                bp->dev->name,
 540                                (bp->sw_bmcr & BMCR_SPEED100) ?
 541                                "100baseT" : "10baseT");
 542                         bp->timer_state = asleep;
 543                         restart_timer = 0;
 544                 } else {
 545                         if (bp->timer_ticks >= 4) {
 546                                 int ret;
 547
 548                                 ret = try_next_permutation(bp, tregs);
 549                                 if (ret == -1) {
 550                                         printk(KERN_ERR "%s: Link down, cable problem?\n",
 551                                                bp->dev->name);
 552                                         ret = bigmac_init_hw(bp, true);
 553                                         if (ret) {
 554                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 555                                                        "BigMAC.\n", bp->dev->name);
 556                                         }
 557                                         return;
 558                                 }
 559                                 bp->timer_ticks = 0;
 560                                 restart_timer = 1;
 561                         } else {
 562                                 restart_timer = 1;
 563                         }
 564                 }
 565         } else {
 566                 /* Can't happens.... */
 567                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 568                        bp->dev->name);
 569                 restart_timer = 0;
 570                 bp->timer_ticks = 0;
 571                 bp->timer_state = asleep; /* foo on you */
 572         }
 573
 574         if (restart_timer != 0) {
 575                 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 576                 add_timer(&bp->bigmac_timer);
 577         }
 578 }
 579
 580 /* Well, really we just force the chip into 100baseT then
 581  * 10baseT, each time checking for a link status.
 582  */
 583 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
 584 {
 585         void __iomem *tregs = bp->tregs;
 586         int timeout;
 587
 588         /* Grab new software copies of PHY registers. */
 589         bp->sw_bmsr     = bigmac_tcvr_read(bp, tregs, MII_BMSR);
 590         bp->sw_bmcr     = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 591
 592         /* Reset the PHY. */
 593         bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 594         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 595         bp->sw_bmcr     = (BMCR_RESET);
 596         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 597
 598         timeout = 64;
 599         while (--timeout) {
 600                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 601                 if ((bp->sw_bmcr & BMCR_RESET) == 0)
 602                         break;
 603                 udelay(20);
 604         }
 605         if (timeout == 0)
 606                 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 607
 608         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, MII_BMCR);
 609
 610         /* First we try 100baseT. */
 611         bp->sw_bmcr |= BMCR_SPEED100;
 612         bigmac_tcvr_write(bp, tregs, MII_BMCR, bp->sw_bmcr);
 613
 614         bp->timer_state = ltrywait;
 615         bp->timer_ticks = 0;
 616         bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
 617         add_timer(&bp->bigmac_timer);
 618 }
 619
 620 static int bigmac_init_hw(struct bigmac *bp, bool non_blocking)
 621 {
 622         void __iomem *gregs        = bp->gregs;
 623         void __iomem *cregs        = bp->creg;
 624         void __iomem *bregs        = bp->bregs;
 625         __u32 bblk_dvma = (__u32)bp->bblock_dvma;
 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, non_blocking);
 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(bblk_dvma + bib_offset(be_rxd, 0),
 675                     cregs + CREG_RXDS);
 676         sbus_writel(bblk_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, true);
 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                 dev->stats.tx_packets++;
 777                 dev->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_consume_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->dev->stats.rx_errors++;
 814                         bp->dev->stats.rx_length_errors++;
 815
 816         drop_it:
 817                         /* Return it to the BigMAC. */
 818                         bp->dev->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->dev->stats.rx_packets++;
 878                 bp->dev->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         timer_setup(&bp->bigmac_timer, bigmac_timer, 0);
 924         ret = bigmac_init_hw(bp, false);
 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, unsigned int txqueue)
 945 {
 946         struct bigmac *bp = netdev_priv(dev);
 947
 948         bigmac_init_hw(bp, true);
 949         netif_wake_queue(dev);
 950 }
 951
 952 /* Put a packet on the wire. */
 953 static netdev_tx_t
 954 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 &dev->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_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         timer_setup(&bp->bigmac_timer, bigmac_timer, 0);
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);