drivers/net/7990.c

   1 /*
   2  * 7990.c -- LANCE ethernet IC generic routines.
   3  * This is an attempt to separate out the bits of various ethernet
   4  * drivers that are common because they all use the AMD 7990 LANCE
   5  * (Local Area Network Controller for Ethernet) chip.
   6  *
   7  * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
   8  *
   9  * Most of this stuff was obtained by looking at other LANCE drivers,
  10  * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
  11  * NB: this was made easy by the fact that Jes Sorensen had cleaned up
  12  * most of a2025 and sunlance with the aim of merging them, so the
  13  * common code was pretty obvious.
  14  */
  15 #include <linux/crc32.h>
  16 #include <linux/delay.h>
  17 #include <linux/dio.h>
  18 #include <linux/errno.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/init.h>
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/types.h>
  25 #include <linux/fcntl.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/ioport.h>
  28 #include <linux/in.h>
  29 #include <linux/route.h>
  30 #include <linux/slab.h>
  31 #include <linux/string.h>
  32 #include <linux/skbuff.h>
  33 /* Used for the temporal inet entries and routing */
  34 #include <linux/socket.h>
  35
  36 #include <asm/system.h>
  37 #include <asm/bitops.h>
  38 #include <asm/io.h>
  39 #include <asm/dma.h>
  40 #include <asm/pgtable.h>
  41
  42 #include "7990.h"
  43
  44 /* Lossage Factor Nine, Mr Sulu. */
  45 #define WRITERAP(x) (lp->writerap(lp,x))
  46 #define WRITERDP(x) (lp->writerdp(lp,x))
  47 #define READRDP() (lp->readrdp(lp))
  48 /* These used to be ll->rap = x, ll->rdp = x, and (ll->rdp). Sigh.
  49  * If you want to switch them back then
  50  * #define DECLARE_LL volatile struct lance_regs *ll = lp->ll
  51  */
  52 #define DECLARE_LL /* nothing to declare */
  53
  54 /* debugging output macros, various flavours */
  55 /* #define TEST_HITS */
  56 #ifdef UNDEF
  57 #define PRINT_RINGS() \
  58 do { \
  59         int t; \
  60         for (t=0; t < RX_RING_SIZE; t++) { \
  61                 printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
  62                        t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
  63                        ib->brx_ring[t].length,\
  64                        ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
  65         }\
  66         for (t=0; t < TX_RING_SIZE; t++) { \
  67                 printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
  68                        t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
  69                        ib->btx_ring[t].length,\
  70                        ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
  71         }\
  72 } while (0)
  73 #else
  74 #define PRINT_RINGS()
  75 #endif
  76
  77 /* Load the CSR registers. The LANCE has to be STOPped when we do this! */
  78 static void load_csrs (struct lance_private *lp)
  79 {
  80         volatile struct lance_init_block *aib = lp->lance_init_block;
  81         int leptr;
  82         DECLARE_LL;
  83
  84         leptr = LANCE_ADDR (aib);
  85
  86         WRITERAP(LE_CSR1);                        /* load address of init block */
  87         WRITERDP(leptr & 0xFFFF);
  88         WRITERAP(LE_CSR2);
  89         WRITERDP(leptr >> 16);
  90         WRITERAP(LE_CSR3);
  91         WRITERDP(lp->busmaster_regval);           /* set byteswap/ALEctrl/byte ctrl */
  92
  93         /* Point back to csr0 */
  94         WRITERAP(LE_CSR0);
  95 }
  96
  97 /* #define to 0 or 1 appropriately */
  98 #define DEBUG_IRING 0
  99 /* Set up the Lance Rx and Tx rings and the init block */
 100 static void lance_init_ring (struct net_device *dev)
 101 {
 102         struct lance_private *lp = (struct lance_private *) dev->priv;
 103         volatile struct lance_init_block *ib = lp->init_block;
 104         volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
 105         int leptr;
 106         int i;
 107
 108         aib = lp->lance_init_block;
 109
 110         lp->rx_new = lp->tx_new = 0;
 111         lp->rx_old = lp->tx_old = 0;
 112
 113         ib->mode = LE_MO_PROM;                             /* normal, enable Tx & Rx */
 114
 115         /* Copy the ethernet address to the lance init block
 116          * Notice that we do a byteswap if we're big endian.
 117          * [I think this is the right criterion; at least, sunlance,
 118          * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
 119          * However, the datasheet says that the BSWAP bit doesn't affect
 120          * the init block, so surely it should be low byte first for
 121          * everybody? Um.]
 122          * We could define the ib->physaddr as three 16bit values and
 123          * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
 124          */
 125 #ifdef __BIG_ENDIAN
 126         ib->phys_addr [0] = dev->dev_addr [1];
 127         ib->phys_addr [1] = dev->dev_addr [0];
 128         ib->phys_addr [2] = dev->dev_addr [3];
 129         ib->phys_addr [3] = dev->dev_addr [2];
 130         ib->phys_addr [4] = dev->dev_addr [5];
 131         ib->phys_addr [5] = dev->dev_addr [4];
 132 #else
 133         for (i=0; i<6; i++)
 134            ib->phys_addr[i] = dev->dev_addr[i];
 135 #endif
 136
 137         if (DEBUG_IRING)
 138                 printk ("TX rings:\n");
 139
 140         lp->tx_full = 0;
 141         /* Setup the Tx ring entries */
 142         for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) {
 143                 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
 144                 ib->btx_ring [i].tmd0      = leptr;
 145                 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
 146                 ib->btx_ring [i].tmd1_bits = 0;
 147                 ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
 148                 ib->btx_ring [i].misc      = 0;
 149                 if (DEBUG_IRING)
 150                    printk ("%d: 0x%8.8x\n", i, leptr);
 151         }
 152
 153         /* Setup the Rx ring entries */
 154         if (DEBUG_IRING)
 155                 printk ("RX rings:\n");
 156         for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
 157                 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
 158
 159                 ib->brx_ring [i].rmd0      = leptr;
 160                 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
 161                 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
 162                 /* 0xf000 == bits that must be one (reserved, presumably) */
 163                 ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
 164                 ib->brx_ring [i].mblength  = 0;
 165                 if (DEBUG_IRING)
 166                         printk ("%d: 0x%8.8x\n", i, leptr);
 167         }
 168
 169         /* Setup the initialization block */
 170
 171         /* Setup rx descriptor pointer */
 172         leptr = LANCE_ADDR(&aib->brx_ring);
 173         ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
 174         ib->rx_ptr = leptr;
 175         if (DEBUG_IRING)
 176                 printk ("RX ptr: %8.8x\n", leptr);
 177
 178         /* Setup tx descriptor pointer */
 179         leptr = LANCE_ADDR(&aib->btx_ring);
 180         ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
 181         ib->tx_ptr = leptr;
 182         if (DEBUG_IRING)
 183                 printk ("TX ptr: %8.8x\n", leptr);
 184
 185         /* Clear the multicast filter */
 186         ib->filter [0] = 0;
 187         ib->filter [1] = 0;
 188         PRINT_RINGS();
 189 }
 190
 191 /* LANCE must be STOPped before we do this, too... */
 192 static int init_restart_lance (struct lance_private *lp)
 193 {
 194         int i;
 195         DECLARE_LL;
 196
 197         WRITERAP(LE_CSR0);
 198         WRITERDP(LE_C0_INIT);
 199
 200         /* Need a hook here for sunlance ledma stuff */
 201
 202         /* Wait for the lance to complete initialization */
 203         for (i = 0; (i < 100) && !(READRDP() & (LE_C0_ERR | LE_C0_IDON)); i++)
 204                 barrier();
 205         if ((i == 100) || (READRDP() & LE_C0_ERR)) {
 206                 printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP());
 207                 return -1;
 208         }
 209
 210         /* Clear IDON by writing a "1", enable interrupts and start lance */
 211         WRITERDP(LE_C0_IDON);
 212         WRITERDP(LE_C0_INEA | LE_C0_STRT);
 213
 214         return 0;
 215 }
 216
 217 static int lance_reset (struct net_device *dev)
 218 {
 219         struct lance_private *lp = (struct lance_private *)dev->priv;
 220         int status;
 221         DECLARE_LL;
 222
 223         /* Stop the lance */
 224         WRITERAP(LE_CSR0);
 225         WRITERDP(LE_C0_STOP);
 226
 227         load_csrs (lp);
 228         lance_init_ring (dev);
 229         dev->trans_start = jiffies;
 230         status = init_restart_lance (lp);
 231 #ifdef DEBUG_DRIVER
 232         printk ("Lance restart=%d\n", status);
 233 #endif
 234         return status;
 235 }
 236
 237 static int lance_rx (struct net_device *dev)
 238 {
 239         struct lance_private *lp = (struct lance_private *) dev->priv;
 240         volatile struct lance_init_block *ib = lp->init_block;
 241         volatile struct lance_rx_desc *rd;
 242         unsigned char bits;
 243         int len = 0;                    /* XXX shut up gcc warnings */
 244         struct sk_buff *skb = 0;        /* XXX shut up gcc warnings */
 245 #ifdef TEST_HITS
 246         int i;
 247 #endif
 248         DECLARE_LL;
 249
 250 #ifdef TEST_HITS
 251         printk ("[");
 252         for (i = 0; i < RX_RING_SIZE; i++) {
 253                 if (i == lp->rx_new)
 254                         printk ("%s",
 255                                 ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
 256                 else
 257                         printk ("%s",
 258                                 ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
 259         }
 260         printk ("]");
 261 #endif
 262
 263         WRITERDP(LE_C0_RINT | LE_C0_INEA);     /* ack Rx int, reenable ints */
 264         for (rd = &ib->brx_ring [lp->rx_new];     /* For each Rx ring we own... */
 265              !((bits = rd->rmd1_bits) & LE_R1_OWN);
 266              rd = &ib->brx_ring [lp->rx_new]) {
 267
 268                 /* We got an incomplete frame? */
 269                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 270                         lp->stats.rx_over_errors++;
 271                         lp->stats.rx_errors++;
 272                         continue;
 273                 } else if (bits & LE_R1_ERR) {
 274                         /* Count only the end frame as a rx error,
 275                          * not the beginning
 276                          */
 277                         if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++;
 278                         if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
 279                         if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
 280                         if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
 281                         if (bits & LE_R1_EOP) lp->stats.rx_errors++;
 282                 } else {
 283                         len = (rd->mblength & 0xfff) - 4;
 284                         skb = dev_alloc_skb (len+2);
 285
 286                         if (skb == 0) {
 287                                 printk ("%s: Memory squeeze, deferring packet.\n",
 288                                         dev->name);
 289                                 lp->stats.rx_dropped++;
 290                                 rd->mblength = 0;
 291                                 rd->rmd1_bits = LE_R1_OWN;
 292                                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 293                                 return 0;
 294                         }
 295
 296                         skb->dev = dev;
 297                         skb_reserve (skb, 2);           /* 16 byte align */
 298                         skb_put (skb, len);             /* make room */
 299                         eth_copy_and_sum(skb,
 300                                          (unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
 301                                          len, 0);
 302                         skb->protocol = eth_type_trans (skb, dev);
 303                         netif_rx (skb);
 304                         dev->last_rx = jiffies;
 305                         lp->stats.rx_packets++;
 306                         lp->stats.rx_bytes += len;
 307                 }
 308
 309                 /* Return the packet to the pool */
 310                 rd->mblength = 0;
 311                 rd->rmd1_bits = LE_R1_OWN;
 312                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 313         }
 314         return 0;
 315 }
 316
 317 static int lance_tx (struct net_device *dev)
 318 {
 319         struct lance_private *lp = (struct lance_private *) dev->priv;
 320         volatile struct lance_init_block *ib = lp->init_block;
 321         volatile struct lance_tx_desc *td;
 322         int i, j;
 323         int status;
 324         DECLARE_LL;
 325
 326         /* csr0 is 2f3 */
 327         WRITERDP(LE_C0_TINT | LE_C0_INEA);
 328         /* csr0 is 73 */
 329
 330         j = lp->tx_old;
 331         for (i = j; i != lp->tx_new; i = j) {
 332                 td = &ib->btx_ring [i];
 333
 334                 /* If we hit a packet not owned by us, stop */
 335                 if (td->tmd1_bits & LE_T1_OWN)
 336                         break;
 337
 338                 if (td->tmd1_bits & LE_T1_ERR) {
 339                         status = td->misc;
 340
 341                         lp->stats.tx_errors++;
 342                         if (status & LE_T3_RTY)  lp->stats.tx_aborted_errors++;
 343                         if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
 344
 345                         if (status & LE_T3_CLOS) {
 346                                 lp->stats.tx_carrier_errors++;
 347                                 if (lp->auto_select) {
 348                                         lp->tpe = 1 - lp->tpe;
 349                                         printk("%s: Carrier Lost, trying %s\n",
 350                                                dev->name, lp->tpe?"TPE":"AUI");
 351                                         /* Stop the lance */
 352                                         WRITERAP(LE_CSR0);
 353                                         WRITERDP(LE_C0_STOP);
 354                                         lance_init_ring (dev);
 355                                         load_csrs (lp);
 356                                         init_restart_lance (lp);
 357                                         return 0;
 358                                 }
 359                         }
 360
 361                         /* buffer errors and underflows turn off the transmitter */
 362                         /* Restart the adapter */
 363                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
 364                                 lp->stats.tx_fifo_errors++;
 365
 366                                 printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 367                                         dev->name);
 368                                 /* Stop the lance */
 369                                 WRITERAP(LE_CSR0);
 370                                 WRITERDP(LE_C0_STOP);
 371                                 lance_init_ring (dev);
 372                                 load_csrs (lp);
 373                                 init_restart_lance (lp);
 374                                 return 0;
 375                         }
 376                 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
 377                         /*
 378                          * So we don't count the packet more than once.
 379                          */
 380                         td->tmd1_bits &= ~(LE_T1_POK);
 381
 382                         /* One collision before packet was sent. */
 383                         if (td->tmd1_bits & LE_T1_EONE)
 384                                 lp->stats.collisions++;
 385
 386                         /* More than one collision, be optimistic. */
 387                         if (td->tmd1_bits & LE_T1_EMORE)
 388                                 lp->stats.collisions += 2;
 389
 390                         lp->stats.tx_packets++;
 391                 }
 392
 393                 j = (j + 1) & lp->tx_ring_mod_mask;
 394         }
 395         lp->tx_old = j;
 396         WRITERDP(LE_C0_TINT | LE_C0_INEA);
 397         return 0;
 398 }
 399
 400 static irqreturn_t
 401 lance_interrupt (int irq, void *dev_id, struct pt_regs *regs)
 402 {
 403         struct net_device *dev = (struct net_device *)dev_id;
 404         struct lance_private *lp = (struct lance_private *)dev->priv;
 405         int csr0;
 406         DECLARE_LL;
 407
 408         spin_lock (&lp->devlock);
 409
 410         WRITERAP(LE_CSR0);              /* LANCE Controller Status */
 411         csr0 = READRDP();
 412
 413         PRINT_RINGS();
 414
 415         if (!(csr0 & LE_C0_INTR)) {     /* Check if any interrupt has */
 416                 spin_lock (&lp->devlock);
 417                 return IRQ_NONE;        /* been generated by the Lance. */
 418         }
 419
 420         /* Acknowledge all the interrupt sources ASAP */
 421         WRITERDP(csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));
 422
 423         if ((csr0 & LE_C0_ERR)) {
 424                 /* Clear the error condition */
 425                 WRITERDP(LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
 426         }
 427
 428         if (csr0 & LE_C0_RINT)
 429                 lance_rx (dev);
 430
 431         if (csr0 & LE_C0_TINT)
 432                 lance_tx (dev);
 433
 434         /* Log misc errors. */
 435         if (csr0 & LE_C0_BABL)
 436                 lp->stats.tx_errors++;       /* Tx babble. */
 437         if (csr0 & LE_C0_MISS)
 438                 lp->stats.rx_errors++;       /* Missed a Rx frame. */
 439         if (csr0 & LE_C0_MERR) {
 440                 printk("%s: Bus master arbitration failure, status %4.4x.\n",
 441                        dev->name, csr0);
 442                 /* Restart the chip. */
 443                 WRITERDP(LE_C0_STRT);
 444         }
 445
 446         if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
 447                 lp->tx_full = 0;
 448                 netif_wake_queue (dev);
 449         }
 450
 451         WRITERAP(LE_CSR0);
 452         WRITERDP(LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);
 453
 454         spin_unlock (&lp->devlock);
 455         return IRQ_HANDLED;
 456 }
 457
 458 int lance_open (struct net_device *dev)
 459 {
 460         struct lance_private *lp = (struct lance_private *)dev->priv;
 461         int res;
 462         DECLARE_LL;
 463
 464         /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
 465         if (request_irq(lp->irq, lance_interrupt, 0, lp->name, dev))
 466                 return -EAGAIN;
 467
 468         res = lance_reset(dev);
 469         lp->devlock = SPIN_LOCK_UNLOCKED;
 470         netif_start_queue (dev);
 471
 472         return res;
 473 }
 474
 475 int lance_close (struct net_device *dev)
 476 {
 477         struct lance_private *lp = (struct lance_private *) dev->priv;
 478         DECLARE_LL;
 479
 480         netif_stop_queue (dev);
 481
 482         /* Stop the LANCE */
 483         WRITERAP(LE_CSR0);
 484         WRITERDP(LE_C0_STOP);
 485
 486         free_irq(lp->irq, dev);
 487
 488         return 0;
 489 }
 490
 491 void lance_tx_timeout(struct net_device *dev)
 492 {
 493         printk("lance_tx_timeout\n");
 494         lance_reset(dev);
 495         dev->trans_start = jiffies;
 496         netif_wake_queue (dev);
 497 }
 498
 499
 500 int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
 501 {
 502         struct lance_private *lp = (struct lance_private *)dev->priv;
 503         volatile struct lance_init_block *ib = lp->init_block;
 504         int entry, skblen, len;
 505         static int outs;
 506         unsigned long flags;
 507         DECLARE_LL;
 508
 509         if (!TX_BUFFS_AVAIL)
 510                 return -1;
 511
 512         netif_stop_queue (dev);
 513
 514         skblen = skb->len;
 515
 516 #ifdef DEBUG_DRIVER
 517         /* dump the packet */
 518         {
 519                 int i;
 520
 521                 for (i = 0; i < 64; i++) {
 522                         if ((i % 16) == 0)
 523                                 printk ("\n");
 524                         printk ("%2.2x ", skb->data [i]);
 525                 }
 526         }
 527 #endif
 528         len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
 529         entry = lp->tx_new & lp->tx_ring_mod_mask;
 530         ib->btx_ring [entry].length = (-len) | 0xf000;
 531         ib->btx_ring [entry].misc = 0;
 532
 533         if (skb->len < ETH_ZLEN)
 534                 memset((char *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
 535         memcpy ((char *)&ib->tx_buf [entry][0], skb->data, skblen);
 536
 537         /* Now, give the packet to the lance */
 538         ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 539         lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
 540
 541         outs++;
 542         /* Kick the lance: transmit now */
 543         WRITERDP(LE_C0_INEA | LE_C0_TDMD);
 544         dev->trans_start = jiffies;
 545         dev_kfree_skb (skb);
 546
 547         spin_lock_irqsave (&lp->devlock, flags);
 548         if (TX_BUFFS_AVAIL)
 549                 netif_start_queue (dev);
 550         else
 551                 lp->tx_full = 1;
 552         spin_unlock_irqrestore (&lp->devlock, flags);
 553
 554         return 0;
 555 }
 556
 557 struct net_device_stats *lance_get_stats (struct net_device *dev)
 558 {
 559         struct lance_private *lp = (struct lance_private *) dev->priv;
 560
 561         return &lp->stats;
 562 }
 563
 564 /* taken from the depca driver via a2065.c */
 565 static void lance_load_multicast (struct net_device *dev)
 566 {
 567         struct lance_private *lp = (struct lance_private *) dev->priv;
 568         volatile struct lance_init_block *ib = lp->init_block;
 569         volatile u16 *mcast_table = (u16 *)&ib->filter;
 570         struct dev_mc_list *dmi=dev->mc_list;
 571         char *addrs;
 572         int i;
 573         u32 crc;
 574
 575         /* set all multicast bits */
 576         if (dev->flags & IFF_ALLMULTI){
 577                 ib->filter [0] = 0xffffffff;
 578                 ib->filter [1] = 0xffffffff;
 579                 return;
 580         }
 581         /* clear the multicast filter */
 582         ib->filter [0] = 0;
 583         ib->filter [1] = 0;
 584
 585         /* Add addresses */
 586         for (i = 0; i < dev->mc_count; i++){
 587                 addrs = dmi->dmi_addr;
 588                 dmi   = dmi->next;
 589
 590                 /* multicast address? */
 591                 if (!(*addrs & 1))
 592                         continue;
 593
 594                 crc = ether_crc_le(6, addrs);
 595                 crc = crc >> 26;
 596                 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
 597         }
 598         return;
 599 }
 600
 601
 602 void lance_set_multicast (struct net_device *dev)
 603 {
 604         struct lance_private *lp = (struct lance_private *) dev->priv;
 605         volatile struct lance_init_block *ib = lp->init_block;
 606         int stopped;
 607         DECLARE_LL;
 608
 609         stopped = netif_queue_stopped(dev);
 610         if (!stopped)
 611                 netif_stop_queue (dev);
 612
 613         while (lp->tx_old != lp->tx_new)
 614                 schedule();
 615
 616         WRITERAP(LE_CSR0);
 617         WRITERDP(LE_C0_STOP);
 618         lance_init_ring (dev);
 619
 620         if (dev->flags & IFF_PROMISC) {
 621                 ib->mode |= LE_MO_PROM;
 622         } else {
 623                 ib->mode &= ~LE_MO_PROM;
 624                 lance_load_multicast (dev);
 625         }
 626         load_csrs (lp);
 627         init_restart_lance (lp);
 628
 629         if (!stopped)
 630                 netif_start_queue (dev);
 631 }
 632
 633 MODULE_LICENSE("GPL");