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/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/types.h>
  23 #include <linux/fcntl.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/ioport.h>
  26 #include <linux/in.h>
  27 #include <linux/route.h>
  28 #include <linux/string.h>
  29 #include <linux/skbuff.h>
  30 #include <asm/irq.h>
  31 /* Used for the temporal inet entries and routing */
  32 #include <linux/socket.h>
  33 #include <linux/bitops.h>
  34
  35 #include <asm/io.h>
  36 #include <asm/dma.h>
  37 #include <asm/pgtable.h>
  38 #ifdef CONFIG_HP300
  39 #include <asm/blinken.h>
  40 #endif
  41
  42 #include "7990.h"
  43
  44 #define WRITERAP(lp, x) out_be16(lp->base + LANCE_RAP, (x))
  45 #define WRITERDP(lp, x) out_be16(lp->base + LANCE_RDP, (x))
  46 #define READRDP(lp)     in_be16(lp->base + LANCE_RDP)
  47
  48 #if IS_ENABLED(CONFIG_HPLANCE)
  49 #include "hplance.h"
  50
  51 #undef WRITERAP
  52 #undef WRITERDP
  53 #undef READRDP
  54
  55 #if IS_ENABLED(CONFIG_MVME147_NET)
  56
  57 /* Lossage Factor Nine, Mr Sulu. */
  58 #define WRITERAP(lp, x) (lp->writerap(lp, x))
  59 #define WRITERDP(lp, x) (lp->writerdp(lp, x))
  60 #define READRDP(lp)     (lp->readrdp(lp))
  61
  62 #else
  63
  64 /* These inlines can be used if only CONFIG_HPLANCE is defined */
  65 static inline void WRITERAP(struct lance_private *lp, __u16 value)
  66 {
  67         do {
  68                 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
  69         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  70 }
  71
  72 static inline void WRITERDP(struct lance_private *lp, __u16 value)
  73 {
  74         do {
  75                 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
  76         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  77 }
  78
  79 static inline __u16 READRDP(struct lance_private *lp)
  80 {
  81         __u16 value;
  82         do {
  83                 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
  84         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  85         return value;
  86 }
  87
  88 #endif
  89 #endif /* IS_ENABLED(CONFIG_HPLANCE) */
  90
  91 /* debugging output macros, various flavours */
  92 /* #define TEST_HITS */
  93 #ifdef UNDEF
  94 #define PRINT_RINGS() \
  95 do { \
  96         int t; \
  97         for (t = 0; t < RX_RING_SIZE; t++) { \
  98                 printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n", \
  99                        t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0, \
 100                        ib->brx_ring[t].length, \
 101                        ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits); \
 102         } \
 103         for (t = 0; t < TX_RING_SIZE; t++) { \
 104                 printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n", \
 105                        t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0, \
 106                        ib->btx_ring[t].length, \
 107                        ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits); \
 108         } \
 109 } while (0)
 110 #else
 111 #define PRINT_RINGS()
 112 #endif
 113
 114 /* Load the CSR registers. The LANCE has to be STOPped when we do this! */
 115 static void load_csrs(struct lance_private *lp)
 116 {
 117         volatile struct lance_init_block *aib = lp->lance_init_block;
 118         int leptr;
 119
 120         leptr = LANCE_ADDR(aib);
 121
 122         WRITERAP(lp, LE_CSR1);                    /* load address of init block */
 123         WRITERDP(lp, leptr & 0xFFFF);
 124         WRITERAP(lp, LE_CSR2);
 125         WRITERDP(lp, leptr >> 16);
 126         WRITERAP(lp, LE_CSR3);
 127         WRITERDP(lp, lp->busmaster_regval);       /* set byteswap/ALEctrl/byte ctrl */
 128
 129         /* Point back to csr0 */
 130         WRITERAP(lp, LE_CSR0);
 131 }
 132
 133 /* #define to 0 or 1 appropriately */
 134 #define DEBUG_IRING 0
 135 /* Set up the Lance Rx and Tx rings and the init block */
 136 static void lance_init_ring(struct net_device *dev)
 137 {
 138         struct lance_private *lp = netdev_priv(dev);
 139         volatile struct lance_init_block *ib = lp->init_block;
 140         volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
 141         int leptr;
 142         int i;
 143
 144         aib = lp->lance_init_block;
 145
 146         lp->rx_new = lp->tx_new = 0;
 147         lp->rx_old = lp->tx_old = 0;
 148
 149         ib->mode = LE_MO_PROM;                             /* normal, enable Tx & Rx */
 150
 151         /* Copy the ethernet address to the lance init block
 152          * Notice that we do a byteswap if we're big endian.
 153          * [I think this is the right criterion; at least, sunlance,
 154          * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
 155          * However, the datasheet says that the BSWAP bit doesn't affect
 156          * the init block, so surely it should be low byte first for
 157          * everybody? Um.]
 158          * We could define the ib->physaddr as three 16bit values and
 159          * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
 160          */
 161 #ifdef __BIG_ENDIAN
 162         ib->phys_addr[0] = dev->dev_addr[1];
 163         ib->phys_addr[1] = dev->dev_addr[0];
 164         ib->phys_addr[2] = dev->dev_addr[3];
 165         ib->phys_addr[3] = dev->dev_addr[2];
 166         ib->phys_addr[4] = dev->dev_addr[5];
 167         ib->phys_addr[5] = dev->dev_addr[4];
 168 #else
 169         for (i = 0; i < 6; i++)
 170                ib->phys_addr[i] = dev->dev_addr[i];
 171 #endif
 172
 173         if (DEBUG_IRING)
 174                 printk("TX rings:\n");
 175
 176         lp->tx_full = 0;
 177         /* Setup the Tx ring entries */
 178         for (i = 0; i < (1 << lp->lance_log_tx_bufs); i++) {
 179                 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
 180                 ib->btx_ring[i].tmd0      = leptr;
 181                 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
 182                 ib->btx_ring[i].tmd1_bits = 0;
 183                 ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
 184                 ib->btx_ring[i].misc      = 0;
 185                 if (DEBUG_IRING)
 186                         printk("%d: 0x%8.8x\n", i, leptr);
 187         }
 188
 189         /* Setup the Rx ring entries */
 190         if (DEBUG_IRING)
 191                 printk("RX rings:\n");
 192         for (i = 0; i < (1 << lp->lance_log_rx_bufs); i++) {
 193                 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
 194
 195                 ib->brx_ring[i].rmd0      = leptr;
 196                 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
 197                 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
 198                 /* 0xf000 == bits that must be one (reserved, presumably) */
 199                 ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
 200                 ib->brx_ring[i].mblength  = 0;
 201                 if (DEBUG_IRING)
 202                         printk("%d: 0x%8.8x\n", i, leptr);
 203         }
 204
 205         /* Setup the initialization block */
 206
 207         /* Setup rx descriptor pointer */
 208         leptr = LANCE_ADDR(&aib->brx_ring);
 209         ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
 210         ib->rx_ptr = leptr;
 211         if (DEBUG_IRING)
 212                 printk("RX ptr: %8.8x\n", leptr);
 213
 214         /* Setup tx descriptor pointer */
 215         leptr = LANCE_ADDR(&aib->btx_ring);
 216         ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
 217         ib->tx_ptr = leptr;
 218         if (DEBUG_IRING)
 219                 printk("TX ptr: %8.8x\n", leptr);
 220
 221         /* Clear the multicast filter */
 222         ib->filter[0] = 0;
 223         ib->filter[1] = 0;
 224         PRINT_RINGS();
 225 }
 226
 227 /* LANCE must be STOPped before we do this, too... */
 228 static int init_restart_lance(struct lance_private *lp)
 229 {
 230         int i;
 231
 232         WRITERAP(lp, LE_CSR0);
 233         WRITERDP(lp, LE_C0_INIT);
 234
 235         /* Need a hook here for sunlance ledma stuff */
 236
 237         /* Wait for the lance to complete initialization */
 238         for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++)
 239                 barrier();
 240         if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) {
 241                 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
 242                 return -1;
 243         }
 244
 245         /* Clear IDON by writing a "1", enable interrupts and start lance */
 246         WRITERDP(lp, LE_C0_IDON);
 247         WRITERDP(lp, LE_C0_INEA | LE_C0_STRT);
 248
 249         return 0;
 250 }
 251
 252 static int lance_reset(struct net_device *dev)
 253 {
 254         struct lance_private *lp = netdev_priv(dev);
 255         int status;
 256
 257         /* Stop the lance */
 258         WRITERAP(lp, LE_CSR0);
 259         WRITERDP(lp, LE_C0_STOP);
 260
 261         load_csrs(lp);
 262         lance_init_ring(dev);
 263         netif_trans_update(dev); /* prevent tx timeout */
 264         status = init_restart_lance(lp);
 265 #ifdef DEBUG_DRIVER
 266         printk("Lance restart=%d\n", status);
 267 #endif
 268         return status;
 269 }
 270
 271 static int lance_rx(struct net_device *dev)
 272 {
 273         struct lance_private *lp = netdev_priv(dev);
 274         volatile struct lance_init_block *ib = lp->init_block;
 275         volatile struct lance_rx_desc *rd;
 276         unsigned char bits;
 277 #ifdef TEST_HITS
 278         int i;
 279 #endif
 280
 281 #ifdef TEST_HITS
 282         printk("[");
 283         for (i = 0; i < RX_RING_SIZE; i++) {
 284                 if (i == lp->rx_new)
 285                         printk("%s",
 286                                ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "_" : "X");
 287                 else
 288                         printk("%s",
 289                               ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "." : "1");
 290         }
 291         printk("]");
 292 #endif
 293 #ifdef CONFIG_HP300
 294         blinken_leds(0x40, 0);
 295 #endif
 296         WRITERDP(lp, LE_C0_RINT | LE_C0_INEA);     /* ack Rx int, reenable ints */
 297         for (rd = &ib->brx_ring[lp->rx_new];     /* For each Rx ring we own... */
 298              !((bits = rd->rmd1_bits) & LE_R1_OWN);
 299              rd = &ib->brx_ring[lp->rx_new]) {
 300
 301                 /* We got an incomplete frame? */
 302                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 303                         dev->stats.rx_over_errors++;
 304                         dev->stats.rx_errors++;
 305                         continue;
 306                 } else if (bits & LE_R1_ERR) {
 307                         /* Count only the end frame as a rx error,
 308                          * not the beginning
 309                          */
 310                         if (bits & LE_R1_BUF)
 311                                 dev->stats.rx_fifo_errors++;
 312                         if (bits & LE_R1_CRC)
 313                                 dev->stats.rx_crc_errors++;
 314                         if (bits & LE_R1_OFL)
 315                                 dev->stats.rx_over_errors++;
 316                         if (bits & LE_R1_FRA)
 317                                 dev->stats.rx_frame_errors++;
 318                         if (bits & LE_R1_EOP)
 319                                 dev->stats.rx_errors++;
 320                 } else {
 321                         int len = (rd->mblength & 0xfff) - 4;
 322                         struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
 323
 324                         if (!skb) {
 325                                 dev->stats.rx_dropped++;
 326                                 rd->mblength = 0;
 327                                 rd->rmd1_bits = LE_R1_OWN;
 328                                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 329                                 return 0;
 330                         }
 331
 332                         skb_reserve(skb, 2);           /* 16 byte align */
 333                         skb_put(skb, len);             /* make room */
 334                         skb_copy_to_linear_data(skb,
 335                                          (unsigned char *)&(ib->rx_buf[lp->rx_new][0]),
 336                                          len);
 337                         skb->protocol = eth_type_trans(skb, dev);
 338                         netif_rx(skb);
 339                         dev->stats.rx_packets++;
 340                         dev->stats.rx_bytes += len;
 341                 }
 342
 343                 /* Return the packet to the pool */
 344                 rd->mblength = 0;
 345                 rd->rmd1_bits = LE_R1_OWN;
 346                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 347         }
 348         return 0;
 349 }
 350
 351 static int lance_tx(struct net_device *dev)
 352 {
 353         struct lance_private *lp = netdev_priv(dev);
 354         volatile struct lance_init_block *ib = lp->init_block;
 355         volatile struct lance_tx_desc *td;
 356         int i, j;
 357         int status;
 358
 359 #ifdef CONFIG_HP300
 360         blinken_leds(0x80, 0);
 361 #endif
 362         /* csr0 is 2f3 */
 363         WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 364         /* csr0 is 73 */
 365
 366         j = lp->tx_old;
 367         for (i = j; i != lp->tx_new; i = j) {
 368                 td = &ib->btx_ring[i];
 369
 370                 /* If we hit a packet not owned by us, stop */
 371                 if (td->tmd1_bits & LE_T1_OWN)
 372                         break;
 373
 374                 if (td->tmd1_bits & LE_T1_ERR) {
 375                         status = td->misc;
 376
 377                         dev->stats.tx_errors++;
 378                         if (status & LE_T3_RTY)
 379                                 dev->stats.tx_aborted_errors++;
 380                         if (status & LE_T3_LCOL)
 381                                 dev->stats.tx_window_errors++;
 382
 383                         if (status & LE_T3_CLOS) {
 384                                 dev->stats.tx_carrier_errors++;
 385                                 if (lp->auto_select) {
 386                                         lp->tpe = 1 - lp->tpe;
 387                                         printk("%s: Carrier Lost, trying %s\n",
 388                                                dev->name,
 389                                                lp->tpe ? "TPE" : "AUI");
 390                                         /* Stop the lance */
 391                                         WRITERAP(lp, LE_CSR0);
 392                                         WRITERDP(lp, LE_C0_STOP);
 393                                         lance_init_ring(dev);
 394                                         load_csrs(lp);
 395                                         init_restart_lance(lp);
 396                                         return 0;
 397                                 }
 398                         }
 399
 400                         /* buffer errors and underflows turn off the transmitter */
 401                         /* Restart the adapter */
 402                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
 403                                 dev->stats.tx_fifo_errors++;
 404
 405                                 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 406                                        dev->name);
 407                                 /* Stop the lance */
 408                                 WRITERAP(lp, LE_CSR0);
 409                                 WRITERDP(lp, LE_C0_STOP);
 410                                 lance_init_ring(dev);
 411                                 load_csrs(lp);
 412                                 init_restart_lance(lp);
 413                                 return 0;
 414                         }
 415                 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
 416                         /*
 417                          * So we don't count the packet more than once.
 418                          */
 419                         td->tmd1_bits &= ~(LE_T1_POK);
 420
 421                         /* One collision before packet was sent. */
 422                         if (td->tmd1_bits & LE_T1_EONE)
 423                                 dev->stats.collisions++;
 424
 425                         /* More than one collision, be optimistic. */
 426                         if (td->tmd1_bits & LE_T1_EMORE)
 427                                 dev->stats.collisions += 2;
 428
 429                         dev->stats.tx_packets++;
 430                 }
 431
 432                 j = (j + 1) & lp->tx_ring_mod_mask;
 433         }
 434         lp->tx_old = j;
 435         WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 436         return 0;
 437 }
 438
 439 static irqreturn_t
 440 lance_interrupt(int irq, void *dev_id)
 441 {
 442         struct net_device *dev = (struct net_device *)dev_id;
 443         struct lance_private *lp = netdev_priv(dev);
 444         int csr0;
 445
 446         spin_lock(&lp->devlock);
 447
 448         WRITERAP(lp, LE_CSR0);              /* LANCE Controller Status */
 449         csr0 = READRDP(lp);
 450
 451         PRINT_RINGS();
 452
 453         if (!(csr0 & LE_C0_INTR)) {     /* Check if any interrupt has */
 454                 spin_unlock(&lp->devlock);
 455                 return IRQ_NONE;        /* been generated by the Lance. */
 456         }
 457
 458         /* Acknowledge all the interrupt sources ASAP */
 459         WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));
 460
 461         if ((csr0 & LE_C0_ERR)) {
 462                 /* Clear the error condition */
 463                 WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
 464         }
 465
 466         if (csr0 & LE_C0_RINT)
 467                 lance_rx(dev);
 468
 469         if (csr0 & LE_C0_TINT)
 470                 lance_tx(dev);
 471
 472         /* Log misc errors. */
 473         if (csr0 & LE_C0_BABL)
 474                 dev->stats.tx_errors++;       /* Tx babble. */
 475         if (csr0 & LE_C0_MISS)
 476                 dev->stats.rx_errors++;       /* Missed a Rx frame. */
 477         if (csr0 & LE_C0_MERR) {
 478                 printk("%s: Bus master arbitration failure, status %4.4x.\n",
 479                        dev->name, csr0);
 480                 /* Restart the chip. */
 481                 WRITERDP(lp, LE_C0_STRT);
 482         }
 483
 484         if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
 485                 lp->tx_full = 0;
 486                 netif_wake_queue(dev);
 487         }
 488
 489         WRITERAP(lp, LE_CSR0);
 490         WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);
 491
 492         spin_unlock(&lp->devlock);
 493         return IRQ_HANDLED;
 494 }
 495
 496 int lance_open(struct net_device *dev)
 497 {
 498         struct lance_private *lp = netdev_priv(dev);
 499         int res;
 500
 501         /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
 502         if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev))
 503                 return -EAGAIN;
 504
 505         res = lance_reset(dev);
 506         spin_lock_init(&lp->devlock);
 507         netif_start_queue(dev);
 508
 509         return res;
 510 }
 511 EXPORT_SYMBOL_GPL(lance_open);
 512
 513 int lance_close(struct net_device *dev)
 514 {
 515         struct lance_private *lp = netdev_priv(dev);
 516
 517         netif_stop_queue(dev);
 518
 519         /* Stop the LANCE */
 520         WRITERAP(lp, LE_CSR0);
 521         WRITERDP(lp, LE_C0_STOP);
 522
 523         free_irq(lp->irq, dev);
 524
 525         return 0;
 526 }
 527 EXPORT_SYMBOL_GPL(lance_close);
 528
 529 void lance_tx_timeout(struct net_device *dev)
 530 {
 531         printk("lance_tx_timeout\n");
 532         lance_reset(dev);
 533         netif_trans_update(dev); /* prevent tx timeout */
 534         netif_wake_queue(dev);
 535 }
 536 EXPORT_SYMBOL_GPL(lance_tx_timeout);
 537
 538 int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
 539 {
 540         struct lance_private *lp = netdev_priv(dev);
 541         volatile struct lance_init_block *ib = lp->init_block;
 542         int entry, skblen, len;
 543         static int outs;
 544         unsigned long flags;
 545
 546         netif_stop_queue(dev);
 547
 548         if (!TX_BUFFS_AVAIL) {
 549                 dev_consume_skb_any(skb);
 550                 return NETDEV_TX_OK;
 551         }
 552
 553         skblen = skb->len;
 554
 555 #ifdef DEBUG_DRIVER
 556         /* dump the packet */
 557         {
 558                 int i;
 559
 560                 for (i = 0; i < 64; i++) {
 561                         if ((i % 16) == 0)
 562                                 printk("\n");
 563                         printk("%2.2x ", skb->data[i]);
 564                 }
 565         }
 566 #endif
 567         len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
 568         entry = lp->tx_new & lp->tx_ring_mod_mask;
 569         ib->btx_ring[entry].length = (-len) | 0xf000;
 570         ib->btx_ring[entry].misc = 0;
 571
 572         if (skb->len < ETH_ZLEN)
 573                 memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
 574         skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
 575
 576         /* Now, give the packet to the lance */
 577         ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 578         lp->tx_new = (lp->tx_new + 1) & lp->tx_ring_mod_mask;
 579
 580         outs++;
 581         /* Kick the lance: transmit now */
 582         WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD);
 583         dev_consume_skb_any(skb);
 584
 585         spin_lock_irqsave(&lp->devlock, flags);
 586         if (TX_BUFFS_AVAIL)
 587                 netif_start_queue(dev);
 588         else
 589                 lp->tx_full = 1;
 590         spin_unlock_irqrestore(&lp->devlock, flags);
 591
 592         return NETDEV_TX_OK;
 593 }
 594 EXPORT_SYMBOL_GPL(lance_start_xmit);
 595
 596 /* taken from the depca driver via a2065.c */
 597 static void lance_load_multicast(struct net_device *dev)
 598 {
 599         struct lance_private *lp = netdev_priv(dev);
 600         volatile struct lance_init_block *ib = lp->init_block;
 601         volatile u16 *mcast_table = (u16 *)&ib->filter;
 602         struct netdev_hw_addr *ha;
 603         u32 crc;
 604
 605         /* set all multicast bits */
 606         if (dev->flags & IFF_ALLMULTI) {
 607                 ib->filter[0] = 0xffffffff;
 608                 ib->filter[1] = 0xffffffff;
 609                 return;
 610         }
 611         /* clear the multicast filter */
 612         ib->filter[0] = 0;
 613         ib->filter[1] = 0;
 614
 615         /* Add addresses */
 616         netdev_for_each_mc_addr(ha, dev) {
 617                 crc = ether_crc_le(6, ha->addr);
 618                 crc = crc >> 26;
 619                 mcast_table[crc >> 4] |= 1 << (crc & 0xf);
 620         }
 621 }
 622
 623
 624 void lance_set_multicast(struct net_device *dev)
 625 {
 626         struct lance_private *lp = netdev_priv(dev);
 627         volatile struct lance_init_block *ib = lp->init_block;
 628         int stopped;
 629
 630         stopped = netif_queue_stopped(dev);
 631         if (!stopped)
 632                 netif_stop_queue(dev);
 633
 634         while (lp->tx_old != lp->tx_new)
 635                 schedule();
 636
 637         WRITERAP(lp, LE_CSR0);
 638         WRITERDP(lp, LE_C0_STOP);
 639         lance_init_ring(dev);
 640
 641         if (dev->flags & IFF_PROMISC) {
 642                 ib->mode |= LE_MO_PROM;
 643         } else {
 644                 ib->mode &= ~LE_MO_PROM;
 645                 lance_load_multicast(dev);
 646         }
 647         load_csrs(lp);
 648         init_restart_lance(lp);
 649
 650         if (!stopped)
 651                 netif_start_queue(dev);
 652 }
 653 EXPORT_SYMBOL_GPL(lance_set_multicast);
 654
 655 #ifdef CONFIG_NET_POLL_CONTROLLER
 656 void lance_poll(struct net_device *dev)
 657 {
 658         struct lance_private *lp = netdev_priv(dev);
 659
 660         spin_lock(&lp->devlock);
 661         WRITERAP(lp, LE_CSR0);
 662         WRITERDP(lp, LE_C0_STRT);
 663         spin_unlock(&lp->devlock);
 664         lance_interrupt(dev->irq, dev);
 665 }
 666 EXPORT_SYMBOL_GPL(lance_poll);
 667 #endif
 668
 669 MODULE_LICENSE("GPL");