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

   1 /* $Id: sunbmac.c,v 1.30 2002/01/15 06:48:55 davem Exp $
   2  * sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
   3  *
   4  * Copyright (C) 1997, 1998, 1999, 2003 David S. Miller (davem@redhat.com)
   5  */
   6
   7 #include <linux/module.h>
   8
   9 #include <linux/kernel.h>
  10 #include <linux/types.h>
  11 #include <linux/fcntl.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/ioport.h>
  14 #include <linux/in.h>
  15 #include <linux/slab.h>
  16 #include <linux/string.h>
  17 #include <linux/delay.h>
  18 #include <linux/init.h>
  19 #include <linux/crc32.h>
  20 #include <linux/errno.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/bitops.h>
  26
  27 #include <asm/auxio.h>
  28 #include <asm/byteorder.h>
  29 #include <asm/dma.h>
  30 #include <asm/idprom.h>
  31 #include <asm/io.h>
  32 #include <asm/openprom.h>
  33 #include <asm/oplib.h>
  34 #include <asm/pgtable.h>
  35 #include <asm/sbus.h>
  36 #include <asm/system.h>
  37
  38 #include "sunbmac.h"
  39
  40 #define DRV_NAME        "sunbmac"
  41 #define DRV_VERSION     "2.0"
  42 #define DRV_RELDATE     "11/24/03"
  43 #define DRV_AUTHOR      "David S. Miller (davem@redhat.com)"
  44
  45 static char version[] __initdata =
  46         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
  47
  48 MODULE_VERSION(DRV_VERSION);
  49 MODULE_AUTHOR(DRV_AUTHOR);
  50 MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
  51 MODULE_LICENSE("GPL");
  52
  53 #undef DEBUG_PROBE
  54 #undef DEBUG_TX
  55 #undef DEBUG_IRQ
  56
  57 #ifdef DEBUG_PROBE
  58 #define DP(x)  printk x
  59 #else
  60 #define DP(x)
  61 #endif
  62
  63 #ifdef DEBUG_TX
  64 #define DTX(x)  printk x
  65 #else
  66 #define DTX(x)
  67 #endif
  68
  69 #ifdef DEBUG_IRQ
  70 #define DIRQ(x)  printk x
  71 #else
  72 #define DIRQ(x)
  73 #endif
  74
  75 static struct bigmac *root_bigmac_dev;
  76
  77 #define DEFAULT_JAMSIZE    4 /* Toe jam */
  78
  79 #define QEC_RESET_TRIES 200
  80
  81 static int qec_global_reset(void __iomem *gregs)
  82 {
  83         int tries = QEC_RESET_TRIES;
  84
  85         sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
  86         while (--tries) {
  87                 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
  88                         udelay(20);
  89                         continue;
  90                 }
  91                 break;
  92         }
  93         if (tries)
  94                 return 0;
  95         printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
  96         return -1;
  97 }
  98
  99 static void qec_init(struct bigmac *bp)
 100 {
 101         void __iomem *gregs = bp->gregs;
 102         struct sbus_dev *qec_sdev = bp->qec_sdev;
 103         u8 bsizes = bp->bigmac_bursts;
 104         u32 regval;
 105
 106         /* 64byte bursts do not work at the moment, do
 107          * not even try to enable them.  -DaveM
 108          */
 109         if (bsizes & DMA_BURST32)
 110                 regval = GLOB_CTRL_B32;
 111         else
 112                 regval = GLOB_CTRL_B16;
 113         sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
 114         sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
 115
 116         /* All of memsize is given to bigmac. */
 117         sbus_writel(qec_sdev->reg_addrs[1].reg_size,
 118                     gregs + GLOB_MSIZE);
 119
 120         /* Half to the transmitter, half to the receiver. */
 121         sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
 122                     gregs + GLOB_TSIZE);
 123         sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
 124                     gregs + GLOB_RSIZE);
 125 }
 126
 127 #define TX_RESET_TRIES     32
 128 #define RX_RESET_TRIES     32
 129
 130 static void bigmac_tx_reset(void __iomem *bregs)
 131 {
 132         int tries = TX_RESET_TRIES;
 133
 134         sbus_writel(0, bregs + BMAC_TXCFG);
 135
 136         /* The fifo threshold bit is read-only and does
 137          * not clear.  -DaveM
 138          */
 139         while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
 140                --tries != 0)
 141                 udelay(20);
 142
 143         if (!tries) {
 144                 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
 145                 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
 146                        sbus_readl(bregs + BMAC_TXCFG));
 147         }
 148 }
 149
 150 static void bigmac_rx_reset(void __iomem *bregs)
 151 {
 152         int tries = RX_RESET_TRIES;
 153
 154         sbus_writel(0, bregs + BMAC_RXCFG);
 155         while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
 156                 udelay(20);
 157
 158         if (!tries) {
 159                 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
 160                 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
 161                        sbus_readl(bregs + BMAC_RXCFG));
 162         }
 163 }
 164
 165 /* Reset the transmitter and receiver. */
 166 static void bigmac_stop(struct bigmac *bp)
 167 {
 168         bigmac_tx_reset(bp->bregs);
 169         bigmac_rx_reset(bp->bregs);
 170 }
 171
 172 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
 173 {
 174         struct net_device_stats *stats = &bp->enet_stats;
 175
 176         stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
 177         sbus_writel(0, bregs + BMAC_RCRCECTR);
 178
 179         stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
 180         sbus_writel(0, bregs + BMAC_UNALECTR);
 181
 182         stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
 183         sbus_writel(0, bregs + BMAC_GLECTR);
 184
 185         stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
 186
 187         stats->collisions +=
 188                 (sbus_readl(bregs + BMAC_EXCTR) +
 189                  sbus_readl(bregs + BMAC_LTCTR));
 190         sbus_writel(0, bregs + BMAC_EXCTR);
 191         sbus_writel(0, bregs + BMAC_LTCTR);
 192 }
 193
 194 static void bigmac_clean_rings(struct bigmac *bp)
 195 {
 196         int i;
 197
 198         for (i = 0; i < RX_RING_SIZE; i++) {
 199                 if (bp->rx_skbs[i] != NULL) {
 200                         dev_kfree_skb_any(bp->rx_skbs[i]);
 201                         bp->rx_skbs[i] = NULL;
 202                 }
 203         }
 204
 205         for (i = 0; i < TX_RING_SIZE; i++) {
 206                 if (bp->tx_skbs[i] != NULL) {
 207                         dev_kfree_skb_any(bp->tx_skbs[i]);
 208                         bp->tx_skbs[i] = NULL;
 209                 }
 210         }
 211 }
 212
 213 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
 214 {
 215         struct bmac_init_block *bb = bp->bmac_block;
 216         struct net_device *dev = bp->dev;
 217         int i;
 218         gfp_t gfp_flags = GFP_KERNEL;
 219
 220         if (from_irq || in_interrupt())
 221                 gfp_flags = GFP_ATOMIC;
 222
 223         bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
 224
 225         /* Free any skippy bufs left around in the rings. */
 226         bigmac_clean_rings(bp);
 227
 228         /* Now get new skbufs for the receive ring. */
 229         for (i = 0; i < RX_RING_SIZE; i++) {
 230                 struct sk_buff *skb;
 231
 232                 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
 233                 if (!skb)
 234                         continue;
 235
 236                 bp->rx_skbs[i] = skb;
 237                 skb->dev = dev;
 238
 239                 /* Because we reserve afterwards. */
 240                 skb_put(skb, ETH_FRAME_LEN);
 241                 skb_reserve(skb, 34);
 242
 243                 bb->be_rxd[i].rx_addr =
 244                         sbus_map_single(bp->bigmac_sdev, skb->data,
 245                                         RX_BUF_ALLOC_SIZE - 34,
 246                                         SBUS_DMA_FROMDEVICE);
 247                 bb->be_rxd[i].rx_flags =
 248                         (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 249         }
 250
 251         for (i = 0; i < TX_RING_SIZE; i++)
 252                 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
 253 }
 254
 255 #define MGMT_CLKON  (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
 256 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
 257
 258 static void idle_transceiver(void __iomem *tregs)
 259 {
 260         int i = 20;
 261
 262         while (i--) {
 263                 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
 264                 sbus_readl(tregs + TCVR_MPAL);
 265                 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
 266                 sbus_readl(tregs + TCVR_MPAL);
 267         }
 268 }
 269
 270 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
 271 {
 272         if (bp->tcvr_type == internal) {
 273                 bit = (bit & 1) << 3;
 274                 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
 275                             tregs + TCVR_MPAL);
 276                 sbus_readl(tregs + TCVR_MPAL);
 277                 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 278                             tregs + TCVR_MPAL);
 279                 sbus_readl(tregs + TCVR_MPAL);
 280         } else if (bp->tcvr_type == external) {
 281                 bit = (bit & 1) << 2;
 282                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
 283                             tregs + TCVR_MPAL);
 284                 sbus_readl(tregs + TCVR_MPAL);
 285                 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
 286                             tregs + TCVR_MPAL);
 287                 sbus_readl(tregs + TCVR_MPAL);
 288         } else {
 289                 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
 290         }
 291 }
 292
 293 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
 294 {
 295         int retval = 0;
 296
 297         if (bp->tcvr_type == internal) {
 298                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 299                 sbus_readl(tregs + TCVR_MPAL);
 300                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 301                             tregs + TCVR_MPAL);
 302                 sbus_readl(tregs + TCVR_MPAL);
 303                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 304         } else if (bp->tcvr_type == external) {
 305                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 306                 sbus_readl(tregs + TCVR_MPAL);
 307                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 308                 sbus_readl(tregs + TCVR_MPAL);
 309                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 310         } else {
 311                 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
 312         }
 313         return retval;
 314 }
 315
 316 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
 317 {
 318         int retval = 0;
 319
 320         if (bp->tcvr_type == internal) {
 321                 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 322                 sbus_readl(tregs + TCVR_MPAL);
 323                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
 324                 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 325                 sbus_readl(tregs + TCVR_MPAL);
 326         } else if (bp->tcvr_type == external) {
 327                 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
 328                 sbus_readl(tregs + TCVR_MPAL);
 329                 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
 330                 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
 331                 sbus_readl(tregs + TCVR_MPAL);
 332         } else {
 333                 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
 334         }
 335         return retval;
 336 }
 337
 338 static void put_tcvr_byte(struct bigmac *bp,
 339                           void __iomem *tregs,
 340                           unsigned int byte)
 341 {
 342         int shift = 4;
 343
 344         do {
 345                 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
 346                 shift -= 1;
 347         } while (shift >= 0);
 348 }
 349
 350 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
 351                               int reg, unsigned short val)
 352 {
 353         int shift;
 354
 355         reg &= 0xff;
 356         val &= 0xffff;
 357         switch(bp->tcvr_type) {
 358         case internal:
 359         case external:
 360                 break;
 361
 362         default:
 363                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 364                 return;
 365         };
 366
 367         idle_transceiver(tregs);
 368         write_tcvr_bit(bp, tregs, 0);
 369         write_tcvr_bit(bp, tregs, 1);
 370         write_tcvr_bit(bp, tregs, 0);
 371         write_tcvr_bit(bp, tregs, 1);
 372
 373         put_tcvr_byte(bp, tregs,
 374                       ((bp->tcvr_type == internal) ?
 375                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 376
 377         put_tcvr_byte(bp, tregs, reg);
 378
 379         write_tcvr_bit(bp, tregs, 1);
 380         write_tcvr_bit(bp, tregs, 0);
 381
 382         shift = 15;
 383         do {
 384                 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
 385                 shift -= 1;
 386         } while (shift >= 0);
 387 }
 388
 389 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
 390                                        void __iomem *tregs,
 391                                        int reg)
 392 {
 393         unsigned short retval = 0;
 394
 395         reg &= 0xff;
 396         switch(bp->tcvr_type) {
 397         case internal:
 398         case external:
 399                 break;
 400
 401         default:
 402                 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
 403                 return 0xffff;
 404         };
 405
 406         idle_transceiver(tregs);
 407         write_tcvr_bit(bp, tregs, 0);
 408         write_tcvr_bit(bp, tregs, 1);
 409         write_tcvr_bit(bp, tregs, 1);
 410         write_tcvr_bit(bp, tregs, 0);
 411
 412         put_tcvr_byte(bp, tregs,
 413                       ((bp->tcvr_type == internal) ?
 414                        BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
 415
 416         put_tcvr_byte(bp, tregs, reg);
 417
 418         if (bp->tcvr_type == external) {
 419                 int shift = 15;
 420
 421                 (void) read_tcvr_bit2(bp, tregs);
 422                 (void) read_tcvr_bit2(bp, tregs);
 423
 424                 do {
 425                         int tmp;
 426
 427                         tmp = read_tcvr_bit2(bp, tregs);
 428                         retval |= ((tmp & 1) << shift);
 429                         shift -= 1;
 430                 } while (shift >= 0);
 431
 432                 (void) read_tcvr_bit2(bp, tregs);
 433                 (void) read_tcvr_bit2(bp, tregs);
 434                 (void) read_tcvr_bit2(bp, tregs);
 435         } else {
 436                 int shift = 15;
 437
 438                 (void) read_tcvr_bit(bp, tregs);
 439                 (void) read_tcvr_bit(bp, tregs);
 440
 441                 do {
 442                         int tmp;
 443
 444                         tmp = read_tcvr_bit(bp, tregs);
 445                         retval |= ((tmp & 1) << shift);
 446                         shift -= 1;
 447                 } while (shift >= 0);
 448
 449                 (void) read_tcvr_bit(bp, tregs);
 450                 (void) read_tcvr_bit(bp, tregs);
 451                 (void) read_tcvr_bit(bp, tregs);
 452         }
 453         return retval;
 454 }
 455
 456 static void bigmac_tcvr_init(struct bigmac *bp)
 457 {
 458         void __iomem *tregs = bp->tregs;
 459         u32 mpal;
 460
 461         idle_transceiver(tregs);
 462         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
 463                     tregs + TCVR_MPAL);
 464         sbus_readl(tregs + TCVR_MPAL);
 465
 466         /* Only the bit for the present transceiver (internal or
 467          * external) will stick, set them both and see what stays.
 468          */
 469         sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
 470         sbus_readl(tregs + TCVR_MPAL);
 471         udelay(20);
 472
 473         mpal = sbus_readl(tregs + TCVR_MPAL);
 474         if (mpal & MGMT_PAL_EXT_MDIO) {
 475                 bp->tcvr_type = external;
 476                 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 477                             tregs + TCVR_TPAL);
 478                 sbus_readl(tregs + TCVR_TPAL);
 479         } else if (mpal & MGMT_PAL_INT_MDIO) {
 480                 bp->tcvr_type = internal;
 481                 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
 482                               TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
 483                             tregs + TCVR_TPAL);
 484                 sbus_readl(tregs + TCVR_TPAL);
 485         } else {
 486                 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
 487                        "external MDIO available!\n");
 488                 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
 489                        sbus_readl(tregs + TCVR_MPAL),
 490                        sbus_readl(tregs + TCVR_TPAL));
 491         }
 492 }
 493
 494 static int bigmac_init(struct bigmac *, int);
 495
 496 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
 497 {
 498         if (bp->sw_bmcr & BMCR_SPEED100) {
 499                 int timeout;
 500
 501                 /* Reset the PHY. */
 502                 bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 503                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 504                 bp->sw_bmcr     = (BMCR_RESET);
 505                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 506
 507                 timeout = 64;
 508                 while (--timeout) {
 509                         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 510                         if ((bp->sw_bmcr & BMCR_RESET) == 0)
 511                                 break;
 512                         udelay(20);
 513                 }
 514                 if (timeout == 0)
 515                         printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 516
 517                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 518
 519                 /* Now we try 10baseT. */
 520                 bp->sw_bmcr &= ~(BMCR_SPEED100);
 521                 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 522                 return 0;
 523         }
 524
 525         /* We've tried them all. */
 526         return -1;
 527 }
 528
 529 static void bigmac_timer(unsigned long data)
 530 {
 531         struct bigmac *bp = (struct bigmac *) data;
 532         void __iomem *tregs = bp->tregs;
 533         int restart_timer = 0;
 534
 535         bp->timer_ticks++;
 536         if (bp->timer_state == ltrywait) {
 537                 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 538                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 539                 if (bp->sw_bmsr & BMSR_LSTATUS) {
 540                         printk(KERN_INFO "%s: Link is now up at %s.\n",
 541                                bp->dev->name,
 542                                (bp->sw_bmcr & BMCR_SPEED100) ?
 543                                "100baseT" : "10baseT");
 544                         bp->timer_state = asleep;
 545                         restart_timer = 0;
 546                 } else {
 547                         if (bp->timer_ticks >= 4) {
 548                                 int ret;
 549
 550                                 ret = try_next_permutation(bp, tregs);
 551                                 if (ret == -1) {
 552                                         printk(KERN_ERR "%s: Link down, cable problem?\n",
 553                                                bp->dev->name);
 554                                         ret = bigmac_init(bp, 0);
 555                                         if (ret) {
 556                                                 printk(KERN_ERR "%s: Error, cannot re-init the "
 557                                                        "BigMAC.\n", bp->dev->name);
 558                                         }
 559                                         return;
 560                                 }
 561                                 bp->timer_ticks = 0;
 562                                 restart_timer = 1;
 563                         } else {
 564                                 restart_timer = 1;
 565                         }
 566                 }
 567         } else {
 568                 /* Can't happens.... */
 569                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
 570                        bp->dev->name);
 571                 restart_timer = 0;
 572                 bp->timer_ticks = 0;
 573                 bp->timer_state = asleep; /* foo on you */
 574         }
 575
 576         if (restart_timer != 0) {
 577                 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
 578                 add_timer(&bp->bigmac_timer);
 579         }
 580 }
 581
 582 /* Well, really we just force the chip into 100baseT then
 583  * 10baseT, each time checking for a link status.
 584  */
 585 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
 586 {
 587         void __iomem *tregs = bp->tregs;
 588         int timeout;
 589
 590         /* Grab new software copies of PHY registers. */
 591         bp->sw_bmsr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
 592         bp->sw_bmcr     = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 593
 594         /* Reset the PHY. */
 595         bp->sw_bmcr     = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
 596         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 597         bp->sw_bmcr     = (BMCR_RESET);
 598         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 599
 600         timeout = 64;
 601         while (--timeout) {
 602                 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 603                 if ((bp->sw_bmcr & BMCR_RESET) == 0)
 604                         break;
 605                 udelay(20);
 606         }
 607         if (timeout == 0)
 608                 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
 609
 610         bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
 611
 612         /* First we try 100baseT. */
 613         bp->sw_bmcr |= BMCR_SPEED100;
 614         bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
 615
 616         bp->timer_state = ltrywait;
 617         bp->timer_ticks = 0;
 618         bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
 619         bp->bigmac_timer.data = (unsigned long) bp;
 620         bp->bigmac_timer.function = &bigmac_timer;
 621         add_timer(&bp->bigmac_timer);
 622 }
 623
 624 static int bigmac_init(struct bigmac *bp, int from_irq)
 625 {
 626         void __iomem *gregs        = bp->gregs;
 627         void __iomem *cregs        = bp->creg;
 628         void __iomem *bregs        = bp->bregs;
 629         unsigned char *e = &bp->dev->dev_addr[0];
 630
 631         /* Latch current counters into statistics. */
 632         bigmac_get_counters(bp, bregs);
 633
 634         /* Reset QEC. */
 635         qec_global_reset(gregs);
 636
 637         /* Init QEC. */
 638         qec_init(bp);
 639
 640         /* Alloc and reset the tx/rx descriptor chains. */
 641         bigmac_init_rings(bp, from_irq);
 642
 643         /* Initialize the PHY. */
 644         bigmac_tcvr_init(bp);
 645
 646         /* Stop transmitter and receiver. */
 647         bigmac_stop(bp);
 648
 649         /* Set hardware ethernet address. */
 650         sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
 651         sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
 652         sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
 653
 654         /* Clear the hash table until mc upload occurs. */
 655         sbus_writel(0, bregs + BMAC_HTABLE3);
 656         sbus_writel(0, bregs + BMAC_HTABLE2);
 657         sbus_writel(0, bregs + BMAC_HTABLE1);
 658         sbus_writel(0, bregs + BMAC_HTABLE0);
 659
 660         /* Enable Big Mac hash table filter. */
 661         sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
 662                     bregs + BMAC_RXCFG);
 663         udelay(20);
 664
 665         /* Ok, configure the Big Mac transmitter. */
 666         sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
 667
 668         /* The HME docs recommend to use the 10LSB of our MAC here. */
 669         sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
 670                     bregs + BMAC_RSEED);
 671
 672         /* Enable the output drivers no matter what. */
 673         sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
 674                     bregs + BMAC_XIFCFG);
 675
 676         /* Tell the QEC where the ring descriptors are. */
 677         sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
 678                     cregs + CREG_RXDS);
 679         sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
 680                     cregs + CREG_TXDS);
 681
 682         /* Setup the FIFO pointers into QEC local memory. */
 683         sbus_writel(0, cregs + CREG_RXRBUFPTR);
 684         sbus_writel(0, cregs + CREG_RXWBUFPTR);
 685         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 686                     cregs + CREG_TXRBUFPTR);
 687         sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
 688                     cregs + CREG_TXWBUFPTR);
 689
 690         /* Tell bigmac what interrupts we don't want to hear about. */
 691         sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
 692                     bregs + BMAC_IMASK);
 693
 694         /* Enable the various other irq's. */
 695         sbus_writel(0, cregs + CREG_RIMASK);
 696         sbus_writel(0, cregs + CREG_TIMASK);
 697         sbus_writel(0, cregs + CREG_QMASK);
 698         sbus_writel(0, cregs + CREG_BMASK);
 699
 700         /* Set jam size to a reasonable default. */
 701         sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
 702
 703         /* Clear collision counter. */
 704         sbus_writel(0, cregs + CREG_CCNT);
 705
 706         /* Enable transmitter and receiver. */
 707         sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
 708                     bregs + BMAC_TXCFG);
 709         sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
 710                     bregs + BMAC_RXCFG);
 711
 712         /* Ok, start detecting link speed/duplex. */
 713         bigmac_begin_auto_negotiation(bp);
 714
 715         /* Success. */
 716         return 0;
 717 }
 718
 719 /* Error interrupts get sent here. */
 720 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
 721 {
 722         printk(KERN_ERR "bigmac_is_medium_rare: ");
 723         if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
 724                 if (qec_status & GLOB_STAT_ER)
 725                         printk("QEC_ERROR, ");
 726                 if (qec_status & GLOB_STAT_BM)
 727                         printk("QEC_BMAC_ERROR, ");
 728         }
 729         if (bmac_status & CREG_STAT_ERRORS) {
 730                 if (bmac_status & CREG_STAT_BERROR)
 731                         printk("BMAC_ERROR, ");
 732                 if (bmac_status & CREG_STAT_TXDERROR)
 733                         printk("TXD_ERROR, ");
 734                 if (bmac_status & CREG_STAT_TXLERR)
 735                         printk("TX_LATE_ERROR, ");
 736                 if (bmac_status & CREG_STAT_TXPERR)
 737                         printk("TX_PARITY_ERROR, ");
 738                 if (bmac_status & CREG_STAT_TXSERR)
 739                         printk("TX_SBUS_ERROR, ");
 740
 741                 if (bmac_status & CREG_STAT_RXDROP)
 742                         printk("RX_DROP_ERROR, ");
 743
 744                 if (bmac_status & CREG_STAT_RXSMALL)
 745                         printk("RX_SMALL_ERROR, ");
 746                 if (bmac_status & CREG_STAT_RXLERR)
 747                         printk("RX_LATE_ERROR, ");
 748                 if (bmac_status & CREG_STAT_RXPERR)
 749                         printk("RX_PARITY_ERROR, ");
 750                 if (bmac_status & CREG_STAT_RXSERR)
 751                         printk("RX_SBUS_ERROR, ");
 752         }
 753
 754         printk(" RESET\n");
 755         bigmac_init(bp, 1);
 756 }
 757
 758 /* BigMAC transmit complete service routines. */
 759 static void bigmac_tx(struct bigmac *bp)
 760 {
 761         struct be_txd *txbase = &bp->bmac_block->be_txd[0];
 762         struct net_device *dev = bp->dev;
 763         int elem;
 764
 765         spin_lock(&bp->lock);
 766
 767         elem = bp->tx_old;
 768         DTX(("bigmac_tx: tx_old[%d] ", elem));
 769         while (elem != bp->tx_new) {
 770                 struct sk_buff *skb;
 771                 struct be_txd *this = &txbase[elem];
 772
 773                 DTX(("this(%p) [flags(%08x)addr(%08x)]",
 774                      this, this->tx_flags, this->tx_addr));
 775
 776                 if (this->tx_flags & TXD_OWN)
 777                         break;
 778                 skb = bp->tx_skbs[elem];
 779                 bp->enet_stats.tx_packets++;
 780                 bp->enet_stats.tx_bytes += skb->len;
 781                 sbus_unmap_single(bp->bigmac_sdev,
 782                                   this->tx_addr, skb->len,
 783                                   SBUS_DMA_TODEVICE);
 784
 785                 DTX(("skb(%p) ", skb));
 786                 bp->tx_skbs[elem] = NULL;
 787                 dev_kfree_skb_irq(skb);
 788
 789                 elem = NEXT_TX(elem);
 790         }
 791         DTX((" DONE, tx_old=%d\n", elem));
 792         bp->tx_old = elem;
 793
 794         if (netif_queue_stopped(dev) &&
 795             TX_BUFFS_AVAIL(bp) > 0)
 796                 netif_wake_queue(bp->dev);
 797
 798         spin_unlock(&bp->lock);
 799 }
 800
 801 /* BigMAC receive complete service routines. */
 802 static void bigmac_rx(struct bigmac *bp)
 803 {
 804         struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
 805         struct be_rxd *this;
 806         int elem = bp->rx_new, drops = 0;
 807         u32 flags;
 808
 809         this = &rxbase[elem];
 810         while (!((flags = this->rx_flags) & RXD_OWN)) {
 811                 struct sk_buff *skb;
 812                 int len = (flags & RXD_LENGTH); /* FCS not included */
 813
 814                 /* Check for errors. */
 815                 if (len < ETH_ZLEN) {
 816                         bp->enet_stats.rx_errors++;
 817                         bp->enet_stats.rx_length_errors++;
 818
 819         drop_it:
 820                         /* Return it to the BigMAC. */
 821                         bp->enet_stats.rx_dropped++;
 822                         this->rx_flags =
 823                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 824                         goto next;
 825                 }
 826                 skb = bp->rx_skbs[elem];
 827                 if (len > RX_COPY_THRESHOLD) {
 828                         struct sk_buff *new_skb;
 829
 830                         /* Now refill the entry, if we can. */
 831                         new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
 832                         if (new_skb == NULL) {
 833                                 drops++;
 834                                 goto drop_it;
 835                         }
 836                         sbus_unmap_single(bp->bigmac_sdev,
 837                                           this->rx_addr,
 838                                           RX_BUF_ALLOC_SIZE - 34,
 839                                           SBUS_DMA_FROMDEVICE);
 840                         bp->rx_skbs[elem] = new_skb;
 841                         new_skb->dev = bp->dev;
 842                         skb_put(new_skb, ETH_FRAME_LEN);
 843                         skb_reserve(new_skb, 34);
 844                         this->rx_addr = sbus_map_single(bp->bigmac_sdev,
 845                                                         new_skb->data,
 846                                                         RX_BUF_ALLOC_SIZE - 34,
 847                                                         SBUS_DMA_FROMDEVICE);
 848                         this->rx_flags =
 849                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 850
 851                         /* Trim the original skb for the netif. */
 852                         skb_trim(skb, len);
 853                 } else {
 854                         struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
 855
 856                         if (copy_skb == NULL) {
 857                                 drops++;
 858                                 goto drop_it;
 859                         }
 860                         copy_skb->dev = bp->dev;
 861                         skb_reserve(copy_skb, 2);
 862                         skb_put(copy_skb, len);
 863                         sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
 864                                                      this->rx_addr, len,
 865                                                      SBUS_DMA_FROMDEVICE);
 866                         eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
 867                         sbus_dma_sync_single_for_device(bp->bigmac_sdev,
 868                                                         this->rx_addr, len,
 869                                                         SBUS_DMA_FROMDEVICE);
 870
 871                         /* Reuse original ring buffer. */
 872                         this->rx_flags =
 873                                 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
 874
 875                         skb = copy_skb;
 876                 }
 877
 878                 /* No checksums done by the BigMAC ;-( */
 879                 skb->protocol = eth_type_trans(skb, bp->dev);
 880                 netif_rx(skb);
 881                 bp->dev->last_rx = jiffies;
 882                 bp->enet_stats.rx_packets++;
 883                 bp->enet_stats.rx_bytes += len;
 884         next:
 885                 elem = NEXT_RX(elem);
 886                 this = &rxbase[elem];
 887         }
 888         bp->rx_new = elem;
 889         if (drops)
 890                 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
 891 }
 892
 893 static irqreturn_t bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 894 {
 895         struct bigmac *bp = (struct bigmac *) dev_id;
 896         u32 qec_status, bmac_status;
 897
 898         DIRQ(("bigmac_interrupt: "));
 899
 900         /* Latch status registers now. */
 901         bmac_status = sbus_readl(bp->creg + CREG_STAT);
 902         qec_status = sbus_readl(bp->gregs + GLOB_STAT);
 903
 904         DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
 905         if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
 906            (bmac_status & CREG_STAT_ERRORS))
 907                 bigmac_is_medium_rare(bp, qec_status, bmac_status);
 908
 909         if (bmac_status & CREG_STAT_TXIRQ)
 910                 bigmac_tx(bp);
 911
 912         if (bmac_status & CREG_STAT_RXIRQ)
 913                 bigmac_rx(bp);
 914
 915         return IRQ_HANDLED;
 916 }
 917
 918 static int bigmac_open(struct net_device *dev)
 919 {
 920         struct bigmac *bp = (struct bigmac *) dev->priv;
 921         int ret;
 922
 923         ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
 924         if (ret) {
 925                 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
 926                 return ret;
 927         }
 928         init_timer(&bp->bigmac_timer);
 929         ret = bigmac_init(bp, 0);
 930         if (ret)
 931                 free_irq(dev->irq, bp);
 932         return ret;
 933 }
 934
 935 static int bigmac_close(struct net_device *dev)
 936 {
 937         struct bigmac *bp = (struct bigmac *) dev->priv;
 938
 939         del_timer(&bp->bigmac_timer);
 940         bp->timer_state = asleep;
 941         bp->timer_ticks = 0;
 942
 943         bigmac_stop(bp);
 944         bigmac_clean_rings(bp);
 945         free_irq(dev->irq, bp);
 946         return 0;
 947 }
 948
 949 static void bigmac_tx_timeout(struct net_device *dev)
 950 {
 951         struct bigmac *bp = (struct bigmac *) dev->priv;
 952
 953         bigmac_init(bp, 0);
 954         netif_wake_queue(dev);
 955 }
 956
 957 /* Put a packet on the wire. */
 958 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 959 {
 960         struct bigmac *bp = (struct bigmac *) dev->priv;
 961         int len, entry;
 962         u32 mapping;
 963
 964         len = skb->len;
 965         mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
 966
 967         /* Avoid a race... */
 968         spin_lock_irq(&bp->lock);
 969         entry = bp->tx_new;
 970         DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
 971         bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
 972         bp->tx_skbs[entry] = skb;
 973         bp->bmac_block->be_txd[entry].tx_addr = mapping;
 974         bp->bmac_block->be_txd[entry].tx_flags =
 975                 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
 976         bp->tx_new = NEXT_TX(entry);
 977         if (TX_BUFFS_AVAIL(bp) <= 0)
 978                 netif_stop_queue(dev);
 979         spin_unlock_irq(&bp->lock);
 980
 981         /* Get it going. */
 982         sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
 983
 984
 985         dev->trans_start = jiffies;
 986
 987         return 0;
 988 }
 989
 990 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
 991 {
 992         struct bigmac *bp = (struct bigmac *) dev->priv;
 993
 994         bigmac_get_counters(bp, bp->bregs);
 995         return &bp->enet_stats;
 996 }
 997
 998 static void bigmac_set_multicast(struct net_device *dev)
 999 {
1000         struct bigmac *bp = (struct bigmac *) dev->priv;
1001         void __iomem *bregs = bp->bregs;
1002         struct dev_mc_list *dmi = dev->mc_list;
1003         char *addrs;
1004         int i;
1005         u32 tmp, crc;
1006
1007         /* Disable the receiver.  The bit self-clears when
1008          * the operation is complete.
1009          */
1010         tmp = sbus_readl(bregs + BMAC_RXCFG);
1011         tmp &= ~(BIGMAC_RXCFG_ENABLE);
1012         sbus_writel(tmp, bregs + BMAC_RXCFG);
1013         while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1014                 udelay(20);
1015
1016         if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1017                 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1018                 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1019                 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1020                 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1021         } else if (dev->flags & IFF_PROMISC) {
1022                 tmp = sbus_readl(bregs + BMAC_RXCFG);
1023                 tmp |= BIGMAC_RXCFG_PMISC;
1024                 sbus_writel(tmp, bregs + BMAC_RXCFG);
1025         } else {
1026                 u16 hash_table[4];
1027
1028                 for (i = 0; i < 4; i++)
1029                         hash_table[i] = 0;
1030
1031                 for (i = 0; i < dev->mc_count; i++) {
1032                         addrs = dmi->dmi_addr;
1033                         dmi = dmi->next;
1034
1035                         if (!(*addrs & 1))
1036                                 continue;
1037
1038                         crc = ether_crc_le(6, addrs);
1039                         crc >>= 26;
1040                         hash_table[crc >> 4] |= 1 << (crc & 0xf);
1041                 }
1042                 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1043                 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1044                 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1045                 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1046         }
1047
1048         /* Re-enable the receiver. */
1049         tmp = sbus_readl(bregs + BMAC_RXCFG);
1050         tmp |= BIGMAC_RXCFG_ENABLE;
1051         sbus_writel(tmp, bregs + BMAC_RXCFG);
1052 }
1053
1054 /* Ethtool support... */
1055 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1056 {
1057         struct bigmac *bp = dev->priv;
1058
1059         strcpy(info->driver, "sunbmac");
1060         strcpy(info->version, "2.0");
1061         sprintf(info->bus_info, "SBUS:%d",
1062                 bp->qec_sdev->slot);
1063 }
1064
1065 static u32 bigmac_get_link(struct net_device *dev)
1066 {
1067         struct bigmac *bp = dev->priv;
1068
1069         spin_lock_irq(&bp->lock);
1070         bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1071         spin_unlock_irq(&bp->lock);
1072
1073         return (bp->sw_bmsr & BMSR_LSTATUS);
1074 }
1075
1076 static struct ethtool_ops bigmac_ethtool_ops = {
1077         .get_drvinfo            = bigmac_get_drvinfo,
1078         .get_link               = bigmac_get_link,
1079 };
1080
1081 static int __init bigmac_ether_init(struct sbus_dev *qec_sdev)
1082 {
1083         struct net_device *dev;
1084         static int version_printed;
1085         struct bigmac *bp;
1086         u8 bsizes, bsizes_more;
1087         int i;
1088
1089         /* Get a new device struct for this interface. */
1090         dev = alloc_etherdev(sizeof(struct bigmac));
1091         if (!dev)
1092                 return -ENOMEM;
1093         SET_MODULE_OWNER(dev);
1094
1095         if (version_printed++ == 0)
1096                 printk(KERN_INFO "%s", version);
1097
1098         dev->base_addr = (long) qec_sdev;
1099         for (i = 0; i < 6; i++)
1100                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1101
1102         /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1103         bp = dev->priv;
1104         bp->qec_sdev = qec_sdev;
1105         bp->bigmac_sdev = qec_sdev->child;
1106
1107         spin_lock_init(&bp->lock);
1108
1109         /* Verify the registers we expect, are actually there. */
1110         if ((bp->bigmac_sdev->num_registers != 3) ||
1111            (bp->qec_sdev->num_registers != 2)) {
1112                 printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.\n",
1113                        bp->qec_sdev->num_registers,
1114                        bp->bigmac_sdev->num_registers);
1115                 printk(KERN_ERR "BIGMAC: Would you like that for here or to go?\n");
1116                 goto fail_and_cleanup;
1117         }
1118
1119         /* Map in QEC global control registers. */
1120         bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
1121                                  GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1122         if (!bp->gregs) {
1123                 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1124                 goto fail_and_cleanup;
1125         }
1126
1127         /* Make sure QEC is in BigMAC mode. */
1128         if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1129                 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1130                 goto fail_and_cleanup;
1131         }
1132
1133         /* Reset the QEC. */
1134         if (qec_global_reset(bp->gregs))
1135                 goto fail_and_cleanup;
1136
1137         /* Get supported SBUS burst sizes. */
1138         bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
1139                                     "burst-sizes",
1140                                     0xff);
1141
1142         bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
1143                                          "burst-sizes",
1144                                          0xff);
1145
1146         bsizes &= 0xff;
1147         if (bsizes_more != 0xff)
1148                 bsizes &= bsizes_more;
1149         if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1150             (bsizes & DMA_BURST32) == 0)
1151                 bsizes = (DMA_BURST32 - 1);
1152         bp->bigmac_bursts = bsizes;
1153
1154         /* Perform QEC initialization. */
1155         qec_init(bp);
1156
1157         /* Map in the BigMAC channel registers. */
1158         bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
1159                                 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1160         if (!bp->creg) {
1161                 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1162                 goto fail_and_cleanup;
1163         }
1164
1165         /* Map in the BigMAC control registers. */
1166         bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
1167                                  BMAC_REG_SIZE, "BigMAC Primary Regs");
1168         if (!bp->bregs) {
1169                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1170                 goto fail_and_cleanup;
1171         }
1172
1173         /* Map in the BigMAC transceiver registers, this is how you poke at
1174          * the BigMAC's PHY.
1175          */
1176         bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
1177                                  TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1178         if (!bp->tregs) {
1179                 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1180                 goto fail_and_cleanup;
1181         }
1182
1183         /* Stop the BigMAC. */
1184         bigmac_stop(bp);
1185
1186         /* Allocate transmit/receive descriptor DVMA block. */
1187         bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
1188                                                PAGE_SIZE,
1189                                                &bp->bblock_dvma);
1190         if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1191                 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1192                 goto fail_and_cleanup;
1193         }
1194
1195         /* Get the board revision of this BigMAC. */
1196         bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
1197                                            "board-version", 1);
1198
1199         /* Init auto-negotiation timer state. */
1200         init_timer(&bp->bigmac_timer);
1201         bp->timer_state = asleep;
1202         bp->timer_ticks = 0;
1203
1204         /* Backlink to generic net device struct. */
1205         bp->dev = dev;
1206
1207         /* Set links to our BigMAC open and close routines. */
1208         dev->open = &bigmac_open;
1209         dev->stop = &bigmac_close;
1210         dev->hard_start_xmit = &bigmac_start_xmit;
1211         dev->ethtool_ops = &bigmac_ethtool_ops;
1212
1213         /* Set links to BigMAC statistic and multi-cast loading code. */
1214         dev->get_stats = &bigmac_get_stats;
1215         dev->set_multicast_list = &bigmac_set_multicast;
1216
1217         dev->tx_timeout = &bigmac_tx_timeout;
1218         dev->watchdog_timeo = 5*HZ;
1219
1220         /* Finish net device registration. */
1221         dev->irq = bp->bigmac_sdev->irqs[0];
1222         dev->dma = 0;
1223
1224         if (register_netdev(dev)) {
1225                 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1226                 goto fail_and_cleanup;
1227         }
1228
1229         /* Put us into the list of instances attached for later driver
1230          * exit.
1231          */
1232         bp->next_module = root_bigmac_dev;
1233         root_bigmac_dev = bp;
1234
1235         printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
1236         for (i = 0; i < 6; i++)
1237                 printk("%2.2x%c", dev->dev_addr[i],
1238                        i == 5 ? ' ' : ':');
1239         printk("\n");
1240
1241         return 0;
1242
1243 fail_and_cleanup:
1244         /* Something went wrong, undo whatever we did so far. */
1245         /* Free register mappings if any. */
1246         if (bp->gregs)
1247                 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1248         if (bp->creg)
1249                 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1250         if (bp->bregs)
1251                 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1252         if (bp->tregs)
1253                 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1254
1255         if (bp->bmac_block)
1256                 sbus_free_consistent(bp->bigmac_sdev,
1257                                      PAGE_SIZE,
1258                                      bp->bmac_block,
1259                                      bp->bblock_dvma);
1260
1261         /* This also frees the co-located 'dev->priv' */
1262         free_netdev(dev);
1263         return -ENODEV;
1264 }
1265
1266 /* QEC can be the parent of either QuadEthernet or
1267  * a BigMAC.  We want the latter.
1268  */
1269 static int __init bigmac_match(struct sbus_dev *sdev)
1270 {
1271         struct sbus_dev *child = sdev->child;
1272
1273         if (strcmp(sdev->prom_name, "qec") != 0)
1274                 return 0;
1275
1276         if (child == NULL)
1277                 return 0;
1278
1279         if (strcmp(child->prom_name, "be") != 0)
1280                 return 0;
1281
1282         return 1;
1283 }
1284
1285 static int __init bigmac_probe(void)
1286 {
1287         struct sbus_bus *sbus;
1288         struct sbus_dev *sdev = NULL;
1289         static int called;
1290         int cards = 0, v;
1291
1292         root_bigmac_dev = NULL;
1293
1294         if (called)
1295                 return -ENODEV;
1296         called++;
1297
1298         for_each_sbus(sbus) {
1299                 for_each_sbusdev(sdev, sbus) {
1300                         if (bigmac_match(sdev)) {
1301                                 cards++;
1302                                 if ((v = bigmac_ether_init(sdev)))
1303                                         return v;
1304                         }
1305                 }
1306         }
1307         if (!cards)
1308                 return -ENODEV;
1309         return 0;
1310 }
1311
1312 static void __exit bigmac_cleanup(void)
1313 {
1314         while (root_bigmac_dev) {
1315                 struct bigmac *bp = root_bigmac_dev;
1316                 struct bigmac *bp_nxt = root_bigmac_dev->next_module;
1317
1318                 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1319                 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1320                 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1321                 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1322                 sbus_free_consistent(bp->bigmac_sdev,
1323                                      PAGE_SIZE,
1324                                      bp->bmac_block,
1325                                      bp->bblock_dvma);
1326
1327                 unregister_netdev(bp->dev);
1328                 free_netdev(bp->dev);
1329                 root_bigmac_dev = bp_nxt;
1330         }
1331 }
1332
1333 module_init(bigmac_probe);
1334 module_exit(bigmac_cleanup);