sys/dev/ex/if_ex.c

   1 /*-
   2  * Copyright (c) 1996, Javier Martín Rueda (jmrueda@diatel.upm.es)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  *
  28  * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
  29  *                             <mdodd@FreeBSD.org>
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 /*
  36  * Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
  37  *
  38  * Revision history:
  39  *
  40  * dd-mmm-yyyy: Multicast support ported from NetBSD's if_iy driver.
  41  * 30-Oct-1996: first beta version. Inet and BPF supported, but no multicast.
  42  */
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/sockio.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/socket.h>
  50
  51 #include <sys/module.h>
  52 #include <sys/bus.h>
  53
  54 #include <machine/bus.h>
  55 #include <machine/resource.h>
  56 #include <sys/rman.h>
  57
  58 #include <net/if.h>
  59 #include <net/if_arp.h>
  60 #include <net/if_dl.h>
  61 #include <net/if_media.h>
  62 #include <net/if_types.h>
  63 #include <net/ethernet.h>
  64 #include <net/bpf.h>
  65
  66 #include <netinet/in.h>
  67 #include <netinet/if_ether.h>
  68
  69
  70 #include <isa/isavar.h>
  71 #include <isa/pnpvar.h>
  72
  73 #include <dev/ex/if_exreg.h>
  74 #include <dev/ex/if_exvar.h>
  75
  76 #ifdef EXDEBUG
  77 # define Start_End 1
  78 # define Rcvd_Pkts 2
  79 # define Sent_Pkts 4
  80 # define Status    8
  81 static int debug_mask = 0;
  82 # define DODEBUG(level, action) if (level & debug_mask) action
  83 #else
  84 # define DODEBUG(level, action)
  85 #endif
  86
  87 devclass_t ex_devclass;
  88
  89 char irq2eemap[] =
  90         { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
  91 u_char ee2irqmap[] =
  92         { 9, 3, 5, 10, 11, 0, 0, 0 };
  93
  94 char plus_irq2eemap[] =
  95         { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
  96 u_char plus_ee2irqmap[] =
  97         { 3, 4, 5, 7, 9, 10, 11, 12 };
  98
  99 /* Network Interface Functions */
 100 static void     ex_init(void *);
 101 static void     ex_start(struct ifnet *);
 102 static int      ex_ioctl(struct ifnet *, u_long, caddr_t);
 103 static void     ex_watchdog(struct ifnet *);
 104
 105 /* ifmedia Functions    */
 106 static int      ex_ifmedia_upd(struct ifnet *);
 107 static void     ex_ifmedia_sts(struct ifnet *, struct ifmediareq *);
 108
 109 static int      ex_get_media(struct ex_softc *);
 110
 111 static void     ex_reset(struct ex_softc *);
 112 static void     ex_setmulti(struct ex_softc *);
 113
 114 static void     ex_tx_intr(struct ex_softc *);
 115 static void     ex_rx_intr(struct ex_softc *);
 116
 117 void
 118 ex_get_address(struct ex_softc *sc, u_char *enaddr)
 119 {
 120         uint16_t        eaddr_tmp;
 121
 122         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Lo);
 123         enaddr[5] = eaddr_tmp & 0xff;
 124         enaddr[4] = eaddr_tmp >> 8;
 125         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Mid);
 126         enaddr[3] = eaddr_tmp & 0xff;
 127         enaddr[2] = eaddr_tmp >> 8;
 128         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Hi);
 129         enaddr[1] = eaddr_tmp & 0xff;
 130         enaddr[0] = eaddr_tmp >> 8;
 131
 132         return;
 133 }
 134
 135 int
 136 ex_card_type(u_char *enaddr)
 137 {
 138         if ((enaddr[0] == 0x00) && (enaddr[1] == 0xA0) && (enaddr[2] == 0xC9))
 139                 return (CARD_TYPE_EX_10_PLUS);
 140
 141         return (CARD_TYPE_EX_10);
 142 }
 143
 144 /*
 145  * Caller is responsible for eventually calling
 146  * ex_release_resources() on failure.
 147  */
 148 int
 149 ex_alloc_resources(device_t dev)
 150 {
 151         struct ex_softc *       sc = device_get_softc(dev);
 152         int                     error = 0;
 153
 154         sc->ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
 155                                             &sc->ioport_rid, RF_ACTIVE);
 156         if (!sc->ioport) {
 157                 device_printf(dev, "No I/O space?!\n");
 158                 error = ENOMEM;
 159                 goto bad;
 160         }
 161         sc->bst = rman_get_bustag(sc->ioport);
 162         sc->bsh = rman_get_bushandle(sc->ioport);
 163
 164         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 165                                         RF_ACTIVE);
 166
 167         if (!sc->irq) {
 168                 device_printf(dev, "No IRQ?!\n");
 169                 error = ENOMEM;
 170                 goto bad;
 171         }
 172
 173 bad:
 174         return (error);
 175 }
 176
 177 void
 178 ex_release_resources(device_t dev)
 179 {
 180         struct ex_softc *       sc = device_get_softc(dev);
 181
 182         if (sc->ih) {
 183                 bus_teardown_intr(dev, sc->irq, sc->ih);
 184                 sc->ih = NULL;
 185         }
 186
 187         if (sc->ioport) {
 188                 bus_release_resource(dev, SYS_RES_IOPORT,
 189                                         sc->ioport_rid, sc->ioport);
 190                 sc->ioport = NULL;
 191         }
 192
 193         if (sc->irq) {
 194                 bus_release_resource(dev, SYS_RES_IRQ,
 195                                         sc->irq_rid, sc->irq);
 196                 sc->irq = NULL;
 197         }
 198
 199         if (sc->ifp)
 200                 if_free(sc->ifp);
 201
 202         return;
 203 }
 204
 205 int
 206 ex_attach(device_t dev)
 207 {
 208         struct ex_softc *       sc = device_get_softc(dev);
 209         struct ifnet *          ifp;
 210         struct ifmedia *        ifm;
 211         uint16_t                temp;
 212
 213         ifp = sc->ifp = if_alloc(IFT_ETHER);
 214         if (ifp == NULL) {
 215                 device_printf(dev, "can not if_alloc()\n");
 216                 return (ENOSPC);
 217         }
 218         /* work out which set of irq <-> internal tables to use */
 219         if (ex_card_type(sc->enaddr) == CARD_TYPE_EX_10_PLUS) {
 220                 sc->irq2ee = plus_irq2eemap;
 221                 sc->ee2irq = plus_ee2irqmap;
 222         } else {
 223                 sc->irq2ee = irq2eemap;
 224                 sc->ee2irq = ee2irqmap;
 225         }
 226
 227         sc->mem_size = CARD_RAM_SIZE;   /* XXX This should be read from the card itself. */
 228
 229         /*
 230          * Initialize the ifnet structure.
 231          */
 232         ifp->if_softc = sc;
 233         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 234         ifp->if_mtu = ETHERMTU;
 235         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST |
 236             IFF_NEEDSGIANT;
 237         ifp->if_start = ex_start;
 238         ifp->if_ioctl = ex_ioctl;
 239         ifp->if_watchdog = ex_watchdog;
 240         ifp->if_init = ex_init;
 241         ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
 242
 243         ifmedia_init(&sc->ifmedia, 0, ex_ifmedia_upd, ex_ifmedia_sts);
 244
 245         temp = ex_eeprom_read(sc, EE_W5);
 246         if (temp & EE_W5_PORT_TPE)
 247                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
 248         if (temp & EE_W5_PORT_BNC)
 249                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
 250         if (temp & EE_W5_PORT_AUI)
 251                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
 252
 253         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
 254         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
 255         ifmedia_set(&sc->ifmedia, ex_get_media(sc));
 256
 257         ifm = &sc->ifmedia;
 258         ifm->ifm_media = ifm->ifm_cur->ifm_media;
 259         ex_ifmedia_upd(ifp);
 260
 261         /*
 262          * Attach the interface.
 263          */
 264         ether_ifattach(ifp, sc->enaddr);
 265
 266         return(0);
 267 }
 268
 269 int
 270 ex_detach(device_t dev)
 271 {
 272         struct ex_softc *sc;
 273         struct ifnet    *ifp;
 274
 275         sc = device_get_softc(dev);
 276         ifp = sc->ifp;
 277
 278         ex_stop(sc);
 279
 280         ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 281         ether_ifdetach(ifp);
 282
 283         ex_release_resources(dev);
 284
 285         return (0);
 286 }
 287
 288 static void
 289 ex_init(void *xsc)
 290 {
 291         struct ex_softc *       sc = (struct ex_softc *) xsc;
 292         struct ifnet *          ifp = sc->ifp;
 293         int                     s;
 294         int                     i;
 295         unsigned short          temp_reg;
 296
 297         DODEBUG(Start_End, printf("%s: ex_init: start\n", ifp->if_xname););
 298
 299         s = splimp();
 300         ifp->if_timer = 0;
 301
 302         /*
 303          * Load the ethernet address into the card.
 304          */
 305         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 306         temp_reg = CSR_READ_1(sc, EEPROM_REG);
 307         if (temp_reg & Trnoff_Enable) {
 308                 CSR_WRITE_1(sc, EEPROM_REG, temp_reg & ~Trnoff_Enable);
 309         }
 310         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 311                 CSR_WRITE_1(sc, I_ADDR_REG0 + i, IF_LLADDR(sc->ifp)[i]);
 312         }
 313         /*
 314          * - Setup transmit chaining and discard bad received frames.
 315          * - Match broadcast.
 316          * - Clear test mode.
 317          * - Set receiving mode.
 318          * - Set IRQ number.
 319          */
 320         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
 321         CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | No_SA_Ins | RX_CRC_InMem);
 322         CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3) & 0x3f /* XXX constants. */ );
 323         CSR_WRITE_1(sc, CMD_REG, Bank1_Sel);
 324         CSR_WRITE_1(sc, INT_NO_REG, (CSR_READ_1(sc, INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
 325
 326         /*
 327          * Divide the available memory in the card into rcv and xmt buffers.
 328          * By default, I use the first 3/4 of the memory for the rcv buffer,
 329          * and the remaining 1/4 of the memory for the xmt buffer.
 330          */
 331         sc->rx_mem_size = sc->mem_size * 3 / 4;
 332         sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
 333         sc->rx_lower_limit = 0x0000;
 334         sc->rx_upper_limit = sc->rx_mem_size - 2;
 335         sc->tx_lower_limit = sc->rx_mem_size;
 336         sc->tx_upper_limit = sc->mem_size - 2;
 337         CSR_WRITE_1(sc, RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
 338         CSR_WRITE_1(sc, RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
 339         CSR_WRITE_1(sc, XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
 340         CSR_WRITE_1(sc, XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
 341
 342         /*
 343          * Enable receive and transmit interrupts, and clear any pending int.
 344          */
 345         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) | TriST_INT);
 346         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 347         CSR_WRITE_1(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 348         CSR_WRITE_1(sc, STATUS_REG, All_Int);
 349
 350         /*
 351          * Initialize receive and transmit ring buffers.
 352          */
 353         CSR_WRITE_2(sc, RCV_BAR, sc->rx_lower_limit);
 354         sc->rx_head = sc->rx_lower_limit;
 355         CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
 356         CSR_WRITE_2(sc, XMT_BAR, sc->tx_lower_limit);
 357         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 358
 359         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 360         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 361         DODEBUG(Status, printf("OIDLE init\n"););
 362
 363         ex_setmulti(sc);
 364
 365         /*
 366          * Final reset of the board, and enable operation.
 367          */
 368         CSR_WRITE_1(sc, CMD_REG, Sel_Reset_CMD);
 369         DELAY(2);
 370         CSR_WRITE_1(sc, CMD_REG, Rcv_Enable_CMD);
 371
 372         ex_start(ifp);
 373         splx(s);
 374
 375         DODEBUG(Start_End, printf("%s: ex_init: finish\n", ifp->if_xname););
 376 }
 377
 378
 379 static void
 380 ex_start(struct ifnet *ifp)
 381 {
 382         struct ex_softc *       sc = ifp->if_softc;
 383         int                     i, s, len, data_len, avail, dest, next;
 384         unsigned char           tmp16[2];
 385         struct mbuf *           opkt;
 386         struct mbuf *           m;
 387
 388         DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
 389
 390         s = splimp();
 391
 392         /*
 393          * Main loop: send outgoing packets to network card until there are no
 394          * more packets left, or the card cannot accept any more yet.
 395          */
 396         while (((opkt = ifp->if_snd.ifq_head) != NULL) &&
 397                !(ifp->if_drv_flags & IFF_DRV_OACTIVE)) {
 398
 399                 /*
 400                  * Ensure there is enough free transmit buffer space for
 401                  * this packet, including its header. Note: the header
 402                  * cannot wrap around the end of the transmit buffer and
 403                  * must be kept together, so we allow space for twice the
 404                  * length of the header, just in case.
 405                  */
 406
 407                 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
 408                         len += m->m_len;
 409                 }
 410
 411                 data_len = len;
 412
 413                 DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
 414
 415                 if (len & 1) {
 416                         len += XMT_HEADER_LEN + 1;
 417                 } else {
 418                         len += XMT_HEADER_LEN;
 419                 }
 420
 421                 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
 422                         avail = sc->tx_mem_size - i;
 423                 } else {
 424                         avail = -i;
 425                 }
 426
 427                 DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
 428
 429                 if (avail >= len + XMT_HEADER_LEN) {
 430                         IF_DEQUEUE(&ifp->if_snd, opkt);
 431
 432 #ifdef EX_PSA_INTR
 433                         /*
 434                          * Disable rx and tx interrupts, to avoid corruption
 435                          * of the host address register by interrupt service
 436                          * routines.
 437                          * XXX Is this necessary with splimp() enabled?
 438                          */
 439                         CSR_WRITE_1(sc, MASK_REG, All_Int);
 440 #endif
 441
 442                         /*
 443                          * Compute the start and end addresses of this
 444                          * frame in the tx buffer.
 445                          */
 446                         dest = sc->tx_tail;
 447                         next = dest + len;
 448
 449                         if (next > sc->tx_upper_limit) {
 450                                 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
 451                                     XMT_HEADER_LEN) {
 452                                         dest = sc->tx_lower_limit;
 453                                         next = dest + len;
 454                                 } else {
 455                                         next = sc->tx_lower_limit +
 456                                                 next - sc->tx_upper_limit - 2;
 457                                 }
 458                         }
 459
 460                         /*
 461                          * Build the packet frame in the card's ring buffer.
 462                          */
 463                         DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
 464
 465                         CSR_WRITE_2(sc, HOST_ADDR_REG, dest);
 466                         CSR_WRITE_2(sc, IO_PORT_REG, Transmit_CMD);
 467                         CSR_WRITE_2(sc, IO_PORT_REG, 0);
 468                         CSR_WRITE_2(sc, IO_PORT_REG, next);
 469                         CSR_WRITE_2(sc, IO_PORT_REG, data_len);
 470
 471                         /*
 472                          * Output the packet data to the card. Ensure all
 473                          * transfers are 16-bit wide, even if individual
 474                          * mbufs have odd length.
 475                          */
 476                         for (m = opkt, i = 0; m != NULL; m = m->m_next) {
 477                                 DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
 478                                 if (i) {
 479                                         tmp16[1] = *(mtod(m, caddr_t));
 480                                         CSR_WRITE_MULTI_2(sc, IO_PORT_REG,
 481                                             (uint16_t *) tmp16, 1);
 482                                 }
 483                                 CSR_WRITE_MULTI_2(sc, IO_PORT_REG,
 484                                     (uint16_t *) (mtod(m, caddr_t) + i),
 485                                     (m->m_len - i) / 2);
 486                                 if ((i = (m->m_len - i) & 1) != 0) {
 487                                         tmp16[0] = *(mtod(m, caddr_t) +
 488                                                    m->m_len - 1);
 489                                 }
 490                         }
 491                         if (i)
 492                                 CSR_WRITE_MULTI_2(sc, IO_PORT_REG,
 493                                     (uint16_t *) tmp16, 1);
 494                         /*
 495                          * If there were other frames chained, update the
 496                          * chain in the last one.
 497                          */
 498                         if (sc->tx_head != sc->tx_tail) {
 499                                 if (sc->tx_tail != dest) {
 500                                         CSR_WRITE_2(sc, HOST_ADDR_REG,
 501                                              sc->tx_last + XMT_Chain_Point);
 502                                         CSR_WRITE_2(sc, IO_PORT_REG, dest);
 503                                 }
 504                                 CSR_WRITE_2(sc, HOST_ADDR_REG,
 505                                      sc->tx_last + XMT_Byte_Count);
 506                                 i = CSR_READ_2(sc, IO_PORT_REG);
 507                                 CSR_WRITE_2(sc, HOST_ADDR_REG,
 508                                      sc->tx_last + XMT_Byte_Count);
 509                                 CSR_WRITE_2(sc, IO_PORT_REG, i | Ch_bit);
 510                         }
 511
 512                         /*
 513                          * Resume normal operation of the card:
 514                          * - Make a dummy read to flush the DRAM write
 515                          *   pipeline.
 516                          * - Enable receive and transmit interrupts.
 517                          * - Send Transmit or Resume_XMT command, as
 518                          *   appropriate.
 519                          */
 520                         CSR_READ_2(sc, IO_PORT_REG);
 521 #ifdef EX_PSA_INTR
 522                         CSR_WRITE_1(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 523 #endif
 524                         if (sc->tx_head == sc->tx_tail) {
 525                                 CSR_WRITE_2(sc, XMT_BAR, dest);
 526                                 CSR_WRITE_1(sc, CMD_REG, Transmit_CMD);
 527                                 sc->tx_head = dest;
 528                                 DODEBUG(Sent_Pkts, printf("Transmit\n"););
 529                         } else {
 530                                 CSR_WRITE_1(sc, CMD_REG, Resume_XMT_List_CMD);
 531                                 DODEBUG(Sent_Pkts, printf("Resume\n"););
 532                         }
 533
 534                         sc->tx_last = dest;
 535                         sc->tx_tail = next;
 536
 537                         BPF_MTAP(ifp, opkt);
 538
 539                         ifp->if_timer = 2;
 540                         ifp->if_opackets++;
 541                         m_freem(opkt);
 542                 } else {
 543                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 544                         DODEBUG(Status, printf("OACTIVE start\n"););
 545                 }
 546         }
 547
 548         splx(s);
 549
 550         DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
 551 }
 552
 553 void
 554 ex_stop(struct ex_softc *sc)
 555 {
 556
 557         DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
 558
 559         /*
 560          * Disable card operation:
 561          * - Disable the interrupt line.
 562          * - Flush transmission and disable reception.
 563          * - Mask and clear all interrupts.
 564          * - Reset the 82595.
 565          */
 566         CSR_WRITE_1(sc, CMD_REG, Bank1_Sel);
 567         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) & ~TriST_INT);
 568         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 569         CSR_WRITE_1(sc, CMD_REG, Rcv_Stop);
 570         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 571         sc->tx_last = 0; /* XXX I think these two lines are not necessary, because ex_init will always be called again to reinit the interface. */
 572         CSR_WRITE_1(sc, MASK_REG, All_Int);
 573         CSR_WRITE_1(sc, STATUS_REG, All_Int);
 574         CSR_WRITE_1(sc, CMD_REG, Reset_CMD);
 575         DELAY(200);
 576
 577         DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
 578
 579         return;
 580 }
 581
 582 void
 583 ex_intr(void *arg)
 584 {
 585         struct ex_softc *sc = (struct ex_softc *)arg;
 586         struct ifnet    *ifp = sc->ifp;
 587         int             int_status, send_pkts;
 588         int             loops = 100;
 589
 590         DODEBUG(Start_End, printf("ex_intr%d: start\n", unit););
 591
 592         send_pkts = 0;
 593         while (loops-- > 0 &&
 594             (int_status = CSR_READ_1(sc, STATUS_REG)) & (Tx_Int | Rx_Int)) {
 595                 /* don't loop forever */
 596                 if (int_status == 0xff)
 597                         break;
 598                 if (int_status & Rx_Int) {
 599                         CSR_WRITE_1(sc, STATUS_REG, Rx_Int);
 600                         ex_rx_intr(sc);
 601                 } else if (int_status & Tx_Int) {
 602                         CSR_WRITE_1(sc, STATUS_REG, Tx_Int);
 603                         ex_tx_intr(sc);
 604                         send_pkts = 1;
 605                 }
 606         }
 607         if (loops == 0)
 608                 printf("100 loops are not enough\n");
 609
 610         /*
 611          * If any packet has been transmitted, and there are queued packets to
 612          * be sent, attempt to send more packets to the network card.
 613          */
 614         if (send_pkts && (ifp->if_snd.ifq_head != NULL))
 615                 ex_start(ifp);
 616
 617         DODEBUG(Start_End, printf("ex_intr%d: finish\n", unit););
 618
 619         return;
 620 }
 621
 622 static void
 623 ex_tx_intr(struct ex_softc *sc)
 624 {
 625         struct ifnet *  ifp = sc->ifp;
 626         int             tx_status;
 627
 628         DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
 629
 630         /*
 631          * - Cancel the watchdog.
 632          * For all packets transmitted since last transmit interrupt:
 633          * - Advance chain pointer to next queued packet.
 634          * - Update statistics.
 635          */
 636
 637         ifp->if_timer = 0;
 638
 639         while (sc->tx_head != sc->tx_tail) {
 640                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->tx_head);
 641
 642                 if (! CSR_READ_2(sc, IO_PORT_REG) & Done_bit)
 643                         break;
 644
 645                 tx_status = CSR_READ_2(sc, IO_PORT_REG);
 646                 sc->tx_head = CSR_READ_2(sc, IO_PORT_REG);
 647
 648                 if (tx_status & TX_OK_bit) {
 649                         ifp->if_opackets++;
 650                 } else {
 651                         ifp->if_oerrors++;
 652                 }
 653
 654                 ifp->if_collisions += tx_status & No_Collisions_bits;
 655         }
 656
 657         /*
 658          * The card should be ready to accept more packets now.
 659          */
 660
 661         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 662
 663         DODEBUG(Status, printf("OIDLE tx_intr\n"););
 664         DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
 665
 666         return;
 667 }
 668
 669 static void
 670 ex_rx_intr(struct ex_softc *sc)
 671 {
 672         struct ifnet *          ifp = sc->ifp;
 673         int                     rx_status;
 674         int                     pkt_len;
 675         int                     QQQ;
 676         struct mbuf *           m;
 677         struct mbuf *           ipkt;
 678         struct ether_header *   eh;
 679
 680         DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
 681
 682         /*
 683          * For all packets received since last receive interrupt:
 684          * - If packet ok, read it into a new mbuf and queue it to interface,
 685          *   updating statistics.
 686          * - If packet bad, just discard it, and update statistics.
 687          * Finally, advance receive stop limit in card's memory to new location.
 688          */
 689
 690         CSR_WRITE_2(sc, HOST_ADDR_REG, sc->rx_head);
 691
 692         while (CSR_READ_2(sc, IO_PORT_REG) == RCV_Done) {
 693
 694                 rx_status = CSR_READ_2(sc, IO_PORT_REG);
 695                 sc->rx_head = CSR_READ_2(sc, IO_PORT_REG);
 696                 QQQ = pkt_len = CSR_READ_2(sc, IO_PORT_REG);
 697
 698                 if (rx_status & RCV_OK_bit) {
 699                         MGETHDR(m, M_DONTWAIT, MT_DATA);
 700                         ipkt = m;
 701                         if (ipkt == NULL) {
 702                                 ifp->if_iqdrops++;
 703                         } else {
 704                                 ipkt->m_pkthdr.rcvif = ifp;
 705                                 ipkt->m_pkthdr.len = pkt_len;
 706                                 ipkt->m_len = MHLEN;
 707
 708                                 while (pkt_len > 0) {
 709                                         if (pkt_len >= MINCLSIZE) {
 710                                                 MCLGET(m, M_DONTWAIT);
 711                                                 if (m->m_flags & M_EXT) {
 712                                                         m->m_len = MCLBYTES;
 713                                                 } else {
 714                                                         m_freem(ipkt);
 715                                                         ifp->if_iqdrops++;
 716                                                         goto rx_another;
 717                                                 }
 718                                         }
 719                                         m->m_len = min(m->m_len, pkt_len);
 720
 721           /*
 722            * NOTE: I'm assuming that all mbufs allocated are of even length,
 723            * except for the last one in an odd-length packet.
 724            */
 725
 726                                         CSR_READ_MULTI_2(sc, IO_PORT_REG,
 727                                             mtod(m, uint16_t *), m->m_len / 2);
 728
 729                                         if (m->m_len & 1) {
 730                                                 *(mtod(m, caddr_t) + m->m_len - 1) = CSR_READ_1(sc, IO_PORT_REG);
 731                                         }
 732                                         pkt_len -= m->m_len;
 733
 734                                         if (pkt_len > 0) {
 735                                                 MGET(m->m_next, M_DONTWAIT, MT_DATA);
 736                                                 if (m->m_next == NULL) {
 737                                                         m_freem(ipkt);
 738                                                         ifp->if_iqdrops++;
 739                                                         goto rx_another;
 740                                                 }
 741                                                 m = m->m_next;
 742                                                 m->m_len = MLEN;
 743                                         }
 744                                 }
 745                                 eh = mtod(ipkt, struct ether_header *);
 746 #ifdef EXDEBUG
 747         if (debug_mask & Rcvd_Pkts) {
 748                 if ((eh->ether_dhost[5] != 0xff) || (eh->ether_dhost[0] != 0xff)) {
 749                         printf("Receive packet with %d data bytes: %6D -> ", QQQ, eh->ether_shost, ":");
 750                         printf("%6D\n", eh->ether_dhost, ":");
 751                 } /* QQQ */
 752         }
 753 #endif
 754                                 (*ifp->if_input)(ifp, ipkt);
 755                                 ifp->if_ipackets++;
 756                         }
 757                 } else {
 758                         ifp->if_ierrors++;
 759                 }
 760                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->rx_head);
 761 rx_another: ;
 762         }
 763
 764         if (sc->rx_head < sc->rx_lower_limit + 2)
 765                 CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_upper_limit);
 766         else
 767                 CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_head - 2);
 768
 769         DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
 770
 771         return;
 772 }
 773
 774
 775 static int
 776 ex_ioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
 777 {
 778         struct ex_softc *       sc = ifp->if_softc;
 779         struct ifreq *          ifr = (struct ifreq *)data;
 780         int                     s;
 781         int                     error = 0;
 782
 783         DODEBUG(Start_End, printf("%s: ex_ioctl: start ", ifp->if_xname););
 784
 785         s = splimp();
 786
 787         switch(cmd) {
 788                 case SIOCSIFADDR:
 789                 case SIOCGIFADDR:
 790                 case SIOCSIFMTU:
 791                         error = ether_ioctl(ifp, cmd, data);
 792                         break;
 793
 794                 case SIOCSIFFLAGS:
 795                         DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
 796                         if ((ifp->if_flags & IFF_UP) == 0 &&
 797                             (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 798
 799                                 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 800                                 ex_stop(sc);
 801                         } else {
 802                                 ex_init(sc);
 803                         }
 804                         break;
 805                 case SIOCADDMULTI:
 806                 case SIOCDELMULTI:
 807                         ex_init(sc);
 808                         error = 0;
 809                         break;
 810                 case SIOCSIFMEDIA:
 811                 case SIOCGIFMEDIA:
 812                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
 813                         break;
 814                 default:
 815                         DODEBUG(Start_End, printf("unknown"););
 816                         error = EINVAL;
 817         }
 818
 819         splx(s);
 820
 821         DODEBUG(Start_End, printf("\n%s: ex_ioctl: finish\n", ifp->if_xname););
 822
 823         return(error);
 824 }
 825
 826 static void
 827 ex_setmulti(struct ex_softc *sc)
 828 {
 829         struct ifnet *ifp;
 830         struct ifmultiaddr *maddr;
 831         uint16_t *addr;
 832         int count;
 833         int timeout, status;
 834
 835         ifp = sc->ifp;
 836
 837         count = 0;
 838         IF_ADDR_LOCK(ifp);
 839         TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
 840                 if (maddr->ifma_addr->sa_family != AF_LINK)
 841                         continue;
 842                 count++;
 843         }
 844         IF_ADDR_UNLOCK(ifp);
 845
 846         if ((ifp->if_flags & IFF_PROMISC) || (ifp->if_flags & IFF_ALLMULTI)
 847                         || count > 63) {
 848                 /* Interface is in promiscuous mode or there are too many
 849                  * multicast addresses for the card to handle */
 850                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 851                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | Promisc_Mode);
 852                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
 853                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 854         }
 855         else if ((ifp->if_flags & IFF_MULTICAST) && (count > 0)) {
 856                 /* Program multicast addresses plus our MAC address
 857                  * into the filter */
 858                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 859                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | Multi_IA);
 860                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
 861                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 862
 863                 /* Borrow space from TX buffer; this should be safe
 864                  * as this is only called from ex_init */
 865
 866                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->tx_lower_limit);
 867                 CSR_WRITE_2(sc, IO_PORT_REG, MC_Setup_CMD);
 868                 CSR_WRITE_2(sc, IO_PORT_REG, 0);
 869                 CSR_WRITE_2(sc, IO_PORT_REG, 0);
 870                 CSR_WRITE_2(sc, IO_PORT_REG, (count + 1) * 6);
 871
 872                 IF_ADDR_LOCK(ifp);
 873                 TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
 874                         if (maddr->ifma_addr->sa_family != AF_LINK)
 875                                 continue;
 876
 877                         addr = (uint16_t*)LLADDR((struct sockaddr_dl *)
 878                                         maddr->ifma_addr);
 879                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 880                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 881                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 882                 }
 883                 IF_ADDR_UNLOCK(ifp);
 884
 885                 /* Program our MAC address as well */
 886                 /* XXX: Is this necessary?  The Linux driver does this
 887                  * but the NetBSD driver does not */
 888                 addr = (uint16_t*)IF_LLADDR(sc->ifp);
 889                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 890                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 891                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
 892
 893                 CSR_READ_2(sc, IO_PORT_REG);
 894                 CSR_WRITE_2(sc, XMT_BAR, sc->tx_lower_limit);
 895                 CSR_WRITE_1(sc, CMD_REG, MC_Setup_CMD);
 896
 897                 sc->tx_head = sc->tx_lower_limit;
 898                 sc->tx_tail = sc->tx_head + XMT_HEADER_LEN + (count + 1) * 6;
 899
 900                 for (timeout=0; timeout<100; timeout++) {
 901                         DELAY(2);
 902                         if ((CSR_READ_1(sc, STATUS_REG) & Exec_Int) == 0)
 903                                 continue;
 904
 905                         status = CSR_READ_1(sc, CMD_REG);
 906                         CSR_WRITE_1(sc, STATUS_REG, Exec_Int);
 907                         break;
 908                 }
 909
 910                 sc->tx_head = sc->tx_tail;
 911         }
 912         else
 913         {
 914                 /* No multicast or promiscuous mode */
 915                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 916                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) & 0xDE);
 917                         /* ~(Multi_IA | Promisc_Mode) */
 918                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
 919                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 920         }
 921 }
 922
 923 static void
 924 ex_reset(struct ex_softc *sc)
 925 {
 926         int s;
 927
 928         DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
 929
 930         s = splimp();
 931
 932         ex_stop(sc);
 933         ex_init(sc);
 934
 935         splx(s);
 936
 937         DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
 938
 939         return;
 940 }
 941
 942 static void
 943 ex_watchdog(struct ifnet *ifp)
 944 {
 945         struct ex_softc *       sc = ifp->if_softc;
 946
 947         DODEBUG(Start_End, printf("%s: ex_watchdog: start\n", ifp->if_xname););
 948
 949         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 950
 951         DODEBUG(Status, printf("OIDLE watchdog\n"););
 952
 953         ifp->if_oerrors++;
 954         ex_reset(sc);
 955         ex_start(ifp);
 956
 957         DODEBUG(Start_End, printf("%s: ex_watchdog: finish\n", ifp->if_xname););
 958
 959         return;
 960 }
 961
 962 static int
 963 ex_get_media(struct ex_softc *sc)
 964 {
 965         int     current;
 966         int     media;
 967
 968         media = ex_eeprom_read(sc, EE_W5);
 969
 970         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 971         current = CSR_READ_1(sc, REG3);
 972         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 973
 974         if ((current & TPE_bit) && (media & EE_W5_PORT_TPE))
 975                 return(IFM_ETHER|IFM_10_T);
 976         if ((current & BNC_bit) && (media & EE_W5_PORT_BNC))
 977                 return(IFM_ETHER|IFM_10_2);
 978
 979         if (media & EE_W5_PORT_AUI)
 980                 return (IFM_ETHER|IFM_10_5);
 981
 982         return (IFM_ETHER|IFM_AUTO);
 983 }
 984
 985 static int
 986 ex_ifmedia_upd(ifp)
 987         struct ifnet *          ifp;
 988 {
 989         struct ex_softc *       sc = ifp->if_softc;
 990
 991         if (IFM_TYPE(sc->ifmedia.ifm_media) != IFM_ETHER)
 992                 return EINVAL;
 993
 994         return (0);
 995 }
 996
 997 static void
 998 ex_ifmedia_sts(ifp, ifmr)
 999         struct ifnet *          ifp;
1000         struct ifmediareq *     ifmr;
1001 {
1002         struct ex_softc *       sc = ifp->if_softc;
1003
1004         ifmr->ifm_active = ex_get_media(sc);
1005         ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE;
1006
1007         return;
1008 }
1009
1010 u_short
1011 ex_eeprom_read(struct ex_softc *sc, int location)
1012 {
1013         int i;
1014         u_short data = 0;
1015         int read_cmd = location | EE_READ_CMD;
1016         short ctrl_val = EECS;
1017
1018         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
1019         CSR_WRITE_1(sc, EEPROM_REG, EECS);
1020         for (i = 8; i >= 0; i--) {
1021                 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
1022                 CSR_WRITE_1(sc, EEPROM_REG, outval);
1023                 CSR_WRITE_1(sc, EEPROM_REG, outval | EESK);
1024                 DELAY(3);
1025                 CSR_WRITE_1(sc, EEPROM_REG, outval);
1026                 DELAY(2);
1027         }
1028         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
1029
1030         for (i = 16; i > 0; i--) {
1031                 CSR_WRITE_1(sc, EEPROM_REG, ctrl_val | EESK);
1032                 DELAY(3);
1033                 data = (data << 1) |
1034                     ((CSR_READ_1(sc, EEPROM_REG) & EEDO) ? 1 : 0);
1035                 CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
1036                 DELAY(2);
1037         }
1038
1039         ctrl_val &= ~EECS;
1040         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val | EESK);
1041         DELAY(3);
1042         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
1043         DELAY(2);
1044         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
1045         return(data);
1046 }