LXR linux/drivers/net/ethernet/amd/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/errno.h>
  18#include <linux/netdevice.h>
  19#include <linux/etherdevice.h>
  20#include <linux/init.h>
  21#include <linux/module.h>
  22#include <linux/kernel.h>
  23#include <linux/types.h>
  24#include <linux/fcntl.h>
  25#include <linux/interrupt.h>
  26#include <linux/ioport.h>
  27#include <linux/in.h>
  28#include <linux/route.h>
  29#include <linux/string.h>
  30#include <linux/skbuff.h>
  31#include <asm/irq.h>
  32/* Used for the temporal inet entries and routing */
  33#include <linux/socket.h>
  34#include <linux/bitops.h>
  35
  36#include <asm/io.h>
  37#include <asm/dma.h>
  38#include <asm/pgtable.h>
  39#ifdef CONFIG_HP300
  40#include <asm/blinken.h>
  41#endif
  42
  43#include "7990.h"
  44
  45#define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x))
  46#define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x))
  47#define READRDP(lp) in_be16(lp->base + LANCE_RDP)
  48
  49#if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE)
  50#include "hplance.h"
  51
  52#undef WRITERAP
  53#undef WRITERDP
  54#undef READRDP
  55
  56#if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE)
  57
  58/* Lossage Factor Nine, Mr Sulu. */
  59#define WRITERAP(lp,x) (lp->writerap(lp,x))
  60#define WRITERDP(lp,x) (lp->writerdp(lp,x))
  61#define READRDP(lp) (lp->readrdp(lp))
  62
  63#else
  64
  65/* These inlines can be used if only CONFIG_HPLANCE is defined */
  66static inline void WRITERAP(struct lance_private *lp, __u16 value)
  67{
  68        do {
  69                out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
  70        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  71}
  72
  73static inline void WRITERDP(struct lance_private *lp, __u16 value)
  74{
  75        do {
  76                out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
  77        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  78}
  79
  80static inline __u16 READRDP(struct lance_private *lp)
  81{
  82        __u16 value;
  83        do {
  84                value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
  85        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  86        return value;
  87}
  88
  89#endif
  90#endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */
  91
  92/* debugging output macros, various flavours */
  93/* #define TEST_HITS */
  94#ifdef UNDEF
  95#define PRINT_RINGS() \
  96do { \
  97        int t; \
  98        for (t=0; t < RX_RING_SIZE; t++) { \
  99                printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
 100                       t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
 101                       ib->brx_ring[t].length,\
 102                       ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
 103        }\
 104        for (t=0; t < TX_RING_SIZE; t++) { \
 105                printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
 106                       t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
 107                       ib->btx_ring[t].length,\
 108                       ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
 109        }\
 110} while (0)
 111#else
 112#define PRINT_RINGS()
 113#endif
 114
 115/* Load the CSR registers. The LANCE has to be STOPped when we do this! */
 116static void load_csrs (struct lance_private *lp)
 117{
 118        volatile struct lance_init_block *aib = lp->lance_init_block;
 119        int leptr;
 120
 121        leptr = LANCE_ADDR (aib);
 122
 123        WRITERAP(lp, LE_CSR1);                    /* load address of init block */
 124        WRITERDP(lp, leptr & 0xFFFF);
 125        WRITERAP(lp, LE_CSR2);
 126        WRITERDP(lp, leptr >> 16);
 127        WRITERAP(lp, LE_CSR3);
 128        WRITERDP(lp, lp->busmaster_regval);       /* set byteswap/ALEctrl/byte ctrl */
 129
 130        /* Point back to csr0 */
 131        WRITERAP(lp, LE_CSR0);
 132}
 133
 134/* #define to 0 or 1 appropriately */
 135#define DEBUG_IRING 0
 136/* Set up the Lance Rx and Tx rings and the init block */
 137static void lance_init_ring (struct net_device *dev)
 138{
 139        struct lance_private *lp = netdev_priv(dev);
 140        volatile struct lance_init_block *ib = lp->init_block;
 141        volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
 142        int leptr;
 143        int i;
 144
 145        aib = lp->lance_init_block;
 146
 147        lp->rx_new = lp->tx_new = 0;
 148        lp->rx_old = lp->tx_old = 0;
 149
 150        ib->mode = LE_MO_PROM;                             /* normal, enable Tx & Rx */
 151
 152        /* Copy the ethernet address to the lance init block
 153         * Notice that we do a byteswap if we're big endian.
 154         * [I think this is the right criterion; at least, sunlance,
 155         * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
 156         * However, the datasheet says that the BSWAP bit doesn't affect
 157         * the init block, so surely it should be low byte first for
 158         * everybody? Um.]
 159         * We could define the ib->physaddr as three 16bit values and
 160         * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
 161         */
 162#ifdef __BIG_ENDIAN
 163        ib->phys_addr [0] = dev->dev_addr [1];
 164        ib->phys_addr [1] = dev->dev_addr [0];
 165        ib->phys_addr [2] = dev->dev_addr [3];
 166        ib->phys_addr [3] = dev->dev_addr [2];
 167        ib->phys_addr [4] = dev->dev_addr [5];
 168        ib->phys_addr [5] = dev->dev_addr [4];
 169#else
 170        for (i=0; i<6; i++)
 171           ib->phys_addr[i] = dev->dev_addr[i];
 172#endif
 173
 174        if (DEBUG_IRING)
 175                printk ("TX rings:\n");
 176
 177        lp->tx_full = 0;
 178        /* Setup the Tx ring entries */
 179        for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) {
 180                leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
 181                ib->btx_ring [i].tmd0      = leptr;
 182                ib->btx_ring [i].tmd1_hadr = leptr >> 16;
 183                ib->btx_ring [i].tmd1_bits = 0;
 184                ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
 185                ib->btx_ring [i].misc      = 0;
 186                if (DEBUG_IRING)
 187                   printk ("%d: 0x%8.8x\n", i, leptr);
 188        }
 189
 190        /* Setup the Rx ring entries */
 191        if (DEBUG_IRING)
 192                printk ("RX rings:\n");
 193        for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
 194                leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
 195
 196                ib->brx_ring [i].rmd0      = leptr;
 197                ib->brx_ring [i].rmd1_hadr = leptr >> 16;
 198                ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
 199                /* 0xf000 == bits that must be one (reserved, presumably) */
 200                ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
 201                ib->brx_ring [i].mblength  = 0;
 202                if (DEBUG_IRING)
 203                        printk ("%d: 0x%8.8x\n", i, leptr);
 204        }
 205
 206        /* Setup the initialization block */
 207
 208        /* Setup rx descriptor pointer */
 209        leptr = LANCE_ADDR(&aib->brx_ring);
 210        ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
 211        ib->rx_ptr = leptr;
 212        if (DEBUG_IRING)
 213                printk ("RX ptr: %8.8x\n", leptr);
 214
 215        /* Setup tx descriptor pointer */
 216        leptr = LANCE_ADDR(&aib->btx_ring);
 217        ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
 218        ib->tx_ptr = leptr;
 219        if (DEBUG_IRING)
 220                printk ("TX ptr: %8.8x\n", leptr);
 221
 222        /* Clear the multicast filter */
 223        ib->filter [0] = 0;
 224        ib->filter [1] = 0;
 225        PRINT_RINGS();
 226}
 227
 228/* LANCE must be STOPped before we do this, too... */
 229static int init_restart_lance (struct lance_private *lp)
 230{
 231        int i;
 232
 233        WRITERAP(lp, LE_CSR0);
 234        WRITERDP(lp, LE_C0_INIT);
 235
 236        /* Need a hook here for sunlance ledma stuff */
 237
 238        /* Wait for the lance to complete initialization */
 239        for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++)
 240                barrier();
 241        if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) {
 242                printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
 243                return -1;
 244        }
 245
 246        /* Clear IDON by writing a "1", enable interrupts and start lance */
 247        WRITERDP(lp, LE_C0_IDON);
 248        WRITERDP(lp, LE_C0_INEA | LE_C0_STRT);
 249
 250        return 0;
 251}
 252
 253static int lance_reset (struct net_device *dev)
 254{
 255        struct lance_private *lp = netdev_priv(dev);
 256        int status;
 257
 258        /* Stop the lance */
 259        WRITERAP(lp, LE_CSR0);
 260        WRITERDP(lp, LE_C0_STOP);
 261
 262        load_csrs (lp);
 263        lance_init_ring (dev);
 264        dev->trans_start = jiffies; /* prevent tx timeout */
 265        status = init_restart_lance (lp);
 266#ifdef DEBUG_DRIVER
 267        printk ("Lance restart=%d\n", status);
 268#endif
 269        return status;
 270}
 271
 272static int lance_rx (struct net_device *dev)
 273{
 274        struct lance_private *lp = netdev_priv(dev);
 275        volatile struct lance_init_block *ib = lp->init_block;
 276        volatile struct lance_rx_desc *rd;
 277        unsigned char bits;
 278#ifdef TEST_HITS
 279        int i;
 280#endif
 281
 282#ifdef TEST_HITS
 283        printk ("[");
 284        for (i = 0; i < RX_RING_SIZE; i++) {
 285                if (i == lp->rx_new)
 286                        printk ("%s",
 287                                ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
 288                else
 289                        printk ("%s",
 290                                ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
 291        }
 292        printk ("]");
 293#endif
 294#ifdef CONFIG_HP300
 295        blinken_leds(0x40, 0);
 296#endif
 297        WRITERDP(lp, LE_C0_RINT | LE_C0_INEA);     /* ack Rx int, reenable ints */
 298        for (rd = &ib->brx_ring [lp->rx_new];     /* For each Rx ring we own... */
 299             !((bits = rd->rmd1_bits) & LE_R1_OWN);
 300             rd = &ib->brx_ring [lp->rx_new]) {
 301
 302                /* We got an incomplete frame? */
 303                if ((bits & LE_R1_POK) != LE_R1_POK) {
 304                        dev->stats.rx_over_errors++;
 305                        dev->stats.rx_errors++;
 306                        continue;
 307                } else if (bits & LE_R1_ERR) {
 308                        /* Count only the end frame as a rx error,
 309                         * not the beginning
 310                         */
 311                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 312                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 313                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 314                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 315                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 316                } else {
 317                        int len = (rd->mblength & 0xfff) - 4;
 318                        struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
 319
 320                        if (!skb) {
 321                                printk ("%s: Memory squeeze, deferring packet.\n",
 322                                        dev->name);
 323                                dev->stats.rx_dropped++;
 324                                rd->mblength = 0;
 325                                rd->rmd1_bits = LE_R1_OWN;
 326                                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 327                                return 0;
 328                        }
 329
 330                        skb_reserve (skb, 2);           /* 16 byte align */
 331                        skb_put (skb, len);             /* make room */
 332                        skb_copy_to_linear_data(skb,
 333                                         (unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
 334                                         len);
 335                        skb->protocol = eth_type_trans (skb, dev);
 336                        netif_rx (skb);
 337                        dev->stats.rx_packets++;
 338                        dev->stats.rx_bytes += len;
 339                }
 340
 341                /* Return the packet to the pool */
 342                rd->mblength = 0;
 343                rd->rmd1_bits = LE_R1_OWN;
 344                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 345        }
 346        return 0;
 347}
 348
 349static int lance_tx (struct net_device *dev)
 350{
 351        struct lance_private *lp = netdev_priv(dev);
 352        volatile struct lance_init_block *ib = lp->init_block;
 353        volatile struct lance_tx_desc *td;
 354        int i, j;
 355        int status;
 356
 357#ifdef CONFIG_HP300
 358        blinken_leds(0x80, 0);
 359#endif
 360        /* csr0 is 2f3 */
 361        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 362        /* csr0 is 73 */
 363
 364        j = lp->tx_old;
 365        for (i = j; i != lp->tx_new; i = j) {
 366                td = &ib->btx_ring [i];
 367
 368                /* If we hit a packet not owned by us, stop */
 369                if (td->tmd1_bits & LE_T1_OWN)
 370                        break;
 371
 372                if (td->tmd1_bits & LE_T1_ERR) {
 373                        status = td->misc;
 374
 375                        dev->stats.tx_errors++;
 376                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 377                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 378
 379                        if (status & LE_T3_CLOS) {
 380                                dev->stats.tx_carrier_errors++;
 381                                if (lp->auto_select) {
 382                                        lp->tpe = 1 - lp->tpe;
 383                                        printk("%s: Carrier Lost, trying %s\n",
 384                                               dev->name, lp->tpe?"TPE":"AUI");
 385                                        /* Stop the lance */
 386                                        WRITERAP(lp, LE_CSR0);
 387                                        WRITERDP(lp, LE_C0_STOP);
 388                                        lance_init_ring (dev);
 389                                        load_csrs (lp);
 390                                        init_restart_lance (lp);
 391                                        return 0;
 392                                }
 393                        }
 394
 395                        /* buffer errors and underflows turn off the transmitter */
 396                        /* Restart the adapter */
 397                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 398                                dev->stats.tx_fifo_errors++;
 399
 400                                printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 401                                        dev->name);
 402                                /* Stop the lance */
 403                                WRITERAP(lp, LE_CSR0);
 404                                WRITERDP(lp, LE_C0_STOP);
 405                                lance_init_ring (dev);
 406                                load_csrs (lp);
 407                                init_restart_lance (lp);
 408                                return 0;
 409                        }
 410                } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
 411                        /*
 412                         * So we don't count the packet more than once.
 413                         */
 414                        td->tmd1_bits &= ~(LE_T1_POK);
 415
 416                        /* One collision before packet was sent. */
 417                        if (td->tmd1_bits & LE_T1_EONE)
 418                                dev->stats.collisions++;
 419
 420                        /* More than one collision, be optimistic. */
 421                        if (td->tmd1_bits & LE_T1_EMORE)
 422                                dev->stats.collisions += 2;
 423
 424                        dev->stats.tx_packets++;
 425                }
 426
 427                j = (j + 1) & lp->tx_ring_mod_mask;
 428        }
 429        lp->tx_old = j;
 430        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 431        return 0;
 432}
 433
 434static irqreturn_t
 435lance_interrupt (int irq, void *dev_id)
 436{
 437        struct net_device *dev = (struct net_device *)dev_id;
 438        struct lance_private *lp = netdev_priv(dev);
 439        int csr0;
 440
 441        spin_lock (&lp->devlock);
 442
 443        WRITERAP(lp, LE_CSR0);              /* LANCE Controller Status */
 444        csr0 = READRDP(lp);
 445
 446        PRINT_RINGS();
 447
 448        if (!(csr0 & LE_C0_INTR)) {     /* Check if any interrupt has */
 449                spin_unlock (&lp->devlock);
 450                return IRQ_NONE;        /* been generated by the Lance. */
 451        }
 452
 453        /* Acknowledge all the interrupt sources ASAP */
 454        WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));
 455
 456        if ((csr0 & LE_C0_ERR)) {
 457                /* Clear the error condition */
 458                WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
 459        }
 460
 461        if (csr0 & LE_C0_RINT)
 462                lance_rx (dev);
 463
 464        if (csr0 & LE_C0_TINT)
 465                lance_tx (dev);
 466
 467        /* Log misc errors. */
 468        if (csr0 & LE_C0_BABL)
 469                dev->stats.tx_errors++;       /* Tx babble. */
 470        if (csr0 & LE_C0_MISS)
 471                dev->stats.rx_errors++;       /* Missed a Rx frame. */
 472        if (csr0 & LE_C0_MERR) {
 473                printk("%s: Bus master arbitration failure, status %4.4x.\n",
 474                       dev->name, csr0);
 475                /* Restart the chip. */
 476                WRITERDP(lp, LE_C0_STRT);
 477        }
 478
 479        if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
 480                lp->tx_full = 0;
 481                netif_wake_queue (dev);
 482        }
 483
 484        WRITERAP(lp, LE_CSR0);
 485        WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);
 486
 487        spin_unlock (&lp->devlock);
 488        return IRQ_HANDLED;
 489}
 490
 491int lance_open (struct net_device *dev)
 492{
 493        struct lance_private *lp = netdev_priv(dev);
 494        int res;
 495
 496        /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
 497        if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev))
 498                return -EAGAIN;
 499
 500        res = lance_reset(dev);
 501        spin_lock_init(&lp->devlock);
 502        netif_start_queue (dev);
 503
 504        return res;
 505}
 506EXPORT_SYMBOL_GPL(lance_open);
 507
 508int lance_close (struct net_device *dev)
 509{
 510        struct lance_private *lp = netdev_priv(dev);
 511
 512        netif_stop_queue (dev);
 513
 514        /* Stop the LANCE */
 515        WRITERAP(lp, LE_CSR0);
 516        WRITERDP(lp, LE_C0_STOP);
 517
 518        free_irq(lp->irq, dev);
 519
 520        return 0;
 521}
 522EXPORT_SYMBOL_GPL(lance_close);
 523
 524void lance_tx_timeout(struct net_device *dev)
 525{
 526        printk("lance_tx_timeout\n");
 527        lance_reset(dev);
 528        dev->trans_start = jiffies; /* prevent tx timeout */
 529        netif_wake_queue (dev);
 530}
 531EXPORT_SYMBOL_GPL(lance_tx_timeout);
 532
 533int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
 534{
 535        struct lance_private *lp = netdev_priv(dev);
 536        volatile struct lance_init_block *ib = lp->init_block;
 537        int entry, skblen, len;
 538        static int outs;
 539        unsigned long flags;
 540
 541        if (!TX_BUFFS_AVAIL)
 542                return NETDEV_TX_LOCKED;
 543
 544        netif_stop_queue (dev);
 545
 546        skblen = skb->len;
 547
 548#ifdef DEBUG_DRIVER
 549        /* dump the packet */
 550        {
 551                int i;
 552
 553                for (i = 0; i < 64; i++) {
 554                        if ((i % 16) == 0)
 555                                printk ("\n");
 556                        printk ("%2.2x ", skb->data [i]);
 557                }
 558        }
 559#endif
 560        len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
 561        entry = lp->tx_new & lp->tx_ring_mod_mask;
 562        ib->btx_ring [entry].length = (-len) | 0xf000;
 563        ib->btx_ring [entry].misc = 0;
 564
 565        if (skb->len < ETH_ZLEN)
 566                memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
 567        skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
 568
 569        /* Now, give the packet to the lance */
 570        ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 571        lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
 572
 573        outs++;
 574        /* Kick the lance: transmit now */
 575        WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD);
 576        dev_kfree_skb (skb);
 577
 578        spin_lock_irqsave (&lp->devlock, flags);
 579        if (TX_BUFFS_AVAIL)
 580                netif_start_queue (dev);
 581        else
 582                lp->tx_full = 1;
 583        spin_unlock_irqrestore (&lp->devlock, flags);
 584
 585        return NETDEV_TX_OK;
 586}
 587EXPORT_SYMBOL_GPL(lance_start_xmit);
 588
 589/* taken from the depca driver via a2065.c */
 590static void lance_load_multicast (struct net_device *dev)
 591{
 592        struct lance_private *lp = netdev_priv(dev);
 593        volatile struct lance_init_block *ib = lp->init_block;
 594        volatile u16 *mcast_table = (u16 *)&ib->filter;
 595        struct netdev_hw_addr *ha;
 596        u32 crc;
 597
 598        /* set all multicast bits */
 599        if (dev->flags & IFF_ALLMULTI){
 600                ib->filter [0] = 0xffffffff;
 601                ib->filter [1] = 0xffffffff;
 602                return;
 603        }
 604        /* clear the multicast filter */
 605        ib->filter [0] = 0;
 606        ib->filter [1] = 0;
 607
 608        /* Add addresses */
 609        netdev_for_each_mc_addr(ha, dev) {
 610                crc = ether_crc_le(6, ha->addr);
 611                crc = crc >> 26;
 612                mcast_table [crc >> 4] |= 1 << (crc & 0xf);
 613        }
 614}
 615
 616
 617void lance_set_multicast (struct net_device *dev)
 618{
 619        struct lance_private *lp = netdev_priv(dev);
 620        volatile struct lance_init_block *ib = lp->init_block;
 621        int stopped;
 622
 623        stopped = netif_queue_stopped(dev);
 624        if (!stopped)
 625                netif_stop_queue (dev);
 626
 627        while (lp->tx_old != lp->tx_new)
 628                schedule();
 629
 630        WRITERAP(lp, LE_CSR0);
 631        WRITERDP(lp, LE_C0_STOP);
 632        lance_init_ring (dev);
 633
 634        if (dev->flags & IFF_PROMISC) {
 635                ib->mode |= LE_MO_PROM;
 636        } else {
 637                ib->mode &= ~LE_MO_PROM;
 638                lance_load_multicast (dev);
 639        }
 640        load_csrs (lp);
 641        init_restart_lance (lp);
 642
 643        if (!stopped)
 644                netif_start_queue (dev);
 645}
 646EXPORT_SYMBOL_GPL(lance_set_multicast);
 647
 648#ifdef CONFIG_NET_POLL_CONTROLLER
 649void lance_poll(struct net_device *dev)
 650{
 651        struct lance_private *lp = netdev_priv(dev);
 652
 653        spin_lock (&lp->devlock);
 654        WRITERAP(lp, LE_CSR0);
 655        WRITERDP(lp, LE_C0_STRT);
 656        spin_unlock (&lp->devlock);
 657        lance_interrupt(dev->irq, dev);
 658}
 659#endif
 660
 661MODULE_LICENSE("GPL");
 662