sys/dev/netif/cs/if_cs.c

   1 /*
   2  * Copyright (c) 1997,1998 Maxim Bolotin and Oleg Sharoiko.
   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  * $FreeBSD: src/sys/dev/cs/if_cs.c,v 1.19.2.1 2001/01/25 20:13:48 imp Exp $
  28  */
  29
  30 /*
  31  * Device driver for Crystal Semiconductor CS8920 based ethernet
  32  *   adapters. By Maxim Bolotin and Oleg Sharoiko, 27-April-1997
  33  */
  34
  35 /*
  36 #define  CS_DEBUG
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/interrupt.h>
  42 #include <sys/malloc.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/socket.h>
  45 #include <sys/sockio.h>
  46 #include <sys/kernel.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/syslog.h>
  49 #include <sys/module.h>
  50 #include <sys/bus.h>
  51 #include <sys/rman.h>
  52 #include <sys/thread2.h>
  53 #include <sys/machintr.h>
  54
  55 #include <machine/clock.h>
  56
  57 #include <net/if.h>
  58 #include <net/ifq_var.h>
  59 #include <net/if_arp.h>
  60 #include <net/if_media.h>
  61 #include <net/ethernet.h>
  62 #include <net/bpf.h>
  63
  64 #include "if_csreg.h"
  65 #include "if_csvar.h"
  66
  67 #ifdef  CS_USE_64K_DMA
  68 #define CS_DMA_BUFFER_SIZE 65536
  69 #else
  70 #define CS_DMA_BUFFER_SIZE 16384
  71 #endif
  72
  73 static int      cs_recv_delay = 570;
  74 SYSCTL_INT(_machdep, OID_AUTO, cs_recv_delay, CTLFLAG_RW, &cs_recv_delay, 0, "");
  75
  76 static void     cs_init(void *);
  77 static int      cs_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
  78 static void     cs_start(struct ifnet *);
  79 static void     cs_stop(struct cs_softc *);
  80 static void     cs_reset(struct cs_softc *);
  81 static void     cs_watchdog(struct ifnet *);
  82 static void     csintr(void *);
  83
  84 static int      cs_mediachange(struct ifnet *);
  85 static void     cs_mediastatus(struct ifnet *, struct ifmediareq *);
  86 static int      cs_mediaset(struct cs_softc *, int);
  87
  88 static void     cs_write_mbufs(struct cs_softc*, struct mbuf*);
  89 static void     cs_xmit_buf(struct cs_softc*);
  90 static int      cs_get_packet(struct cs_softc*);
  91 static void     cs_setmode(struct cs_softc*);
  92
  93 static int      get_eeprom_data(device_t, int, int, int *);
  94 static int      get_eeprom_cksum(int, int, int *);
  95 static int      wait_eeprom_ready( struct cs_softc *);
  96 static void     control_dc_dc(struct cs_softc *, int );
  97 static int      send_test_pkt(struct cs_softc * );
  98 static int      enable_tp(struct cs_softc *);
  99 static int      enable_aui(struct cs_softc *);
 100 static int      enable_bnc(struct cs_softc *);
 101 static int      cs_duplex_auto(struct cs_softc *);
 102
 103 devclass_t cs_devclass;
 104
 105 DECLARE_DUMMY_MODULE(if_cs);
 106
 107 static int
 108 get_eeprom_data(device_t dev, int off, int len, int *buffer)
 109 {
 110         struct cs_softc *sc;
 111         int i;
 112
 113         sc = device_get_softc(dev);
 114
 115 #ifdef CS_DEBUG
 116         device_printf(dev, "EEPROM data from %x for %x:\n", off, len);
 117 #endif
 118
 119         for (i=0;i<len;i++) {
 120                 if (wait_eeprom_ready(sc) < 0) return -1;
 121                 /* Send command to EEPROM to read */
 122                 cs_writereg(sc->nic_addr, PP_EECMD, (off+i)|EEPROM_READ_CMD );
 123                 if (wait_eeprom_ready(sc)<0)
 124                         return -1;
 125                 buffer[i] = cs_readreg (sc->nic_addr, PP_EEData);
 126
 127 #ifdef CS_DEBUG
 128                 kprintf("%02x %02x ",(unsigned char)buffer[i],
 129                                         (unsigned char)buffer[i+1]);
 130 #endif
 131         }
 132
 133 #ifdef CS_DEBUG
 134         kprintf("\n");
 135 #endif
 136
 137         return 0;
 138 }
 139
 140 static int
 141 get_eeprom_cksum(int off, int len, int *buffer)
 142 {
 143         int i,cksum=0;
 144
 145         for (i=0;i<len;i++)
 146                 cksum+=buffer[i];
 147         cksum &= 0xffff;
 148         if (cksum==0)
 149                 return 0;
 150         return -1;
 151 }
 152
 153 static int
 154 wait_eeprom_ready(struct cs_softc *sc)
 155 {
 156         DELAY ( 30000 );        /* XXX should we do some checks here ? */
 157         return 0;
 158 }
 159
 160 static void
 161 control_dc_dc(struct cs_softc *sc, int on_not_off)
 162 {
 163         unsigned int self_control = HCB1_ENBL;
 164
 165         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0) ^ on_not_off)
 166                 self_control |= HCB1;
 167         else
 168                 self_control &= ~HCB1;
 169         cs_writereg( sc->nic_addr, PP_SelfCTL, self_control );
 170
 171         DELAY( 500000 );
 172 }
 173
 174
 175 static int
 176 cs_duplex_auto(struct cs_softc *sc)
 177 {
 178         int i, error=0;
 179
 180         cs_writereg(sc->nic_addr, PP_AutoNegCTL,
 181                     RE_NEG_NOW | ALLOW_FDX | AUTO_NEG_ENABLE );
 182         for (i=0; cs_readreg(sc->nic_addr,PP_AutoNegST)&AUTO_NEG_BUSY; i++) {
 183                 if (i > 40000) {
 184                         if_printf(&sc->arpcom.ac_if, "full/half duplex "
 185                                   "auto negotiation timeout\n");
 186                         error = ETIMEDOUT;
 187                         break;
 188                 }
 189                 DELAY(1000);
 190         }
 191         DELAY( 1000000 );
 192         return error;
 193 }
 194
 195 static int
 196 enable_tp(struct cs_softc *sc)
 197 {
 198         cs_writereg(sc->nic_addr, PP_LineCTL, sc->line_ctl & ~AUI_ONLY);
 199         control_dc_dc(sc, 0);
 200         DELAY( 150000 );
 201
 202         if ((cs_readreg(sc->nic_addr, PP_LineST) & LINK_OK)==0) {
 203                 if_printf(&sc->arpcom.ac_if, "failed to enable TP\n");
 204                 return EINVAL;
 205         }
 206
 207         return 0;
 208 }
 209
 210 /*
 211  * XXX This was rewritten from Linux driver without any tests.
 212  */
 213 static int
 214 send_test_pkt(struct cs_softc *sc)
 215 {
 216         char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
 217                                 0, 46,  /* A 46 in network order */
 218                                 0, 0,   /* DSAP=0 & SSAP=0 fields */
 219                                 0xf3, 0 /* Control (Test Req + P bit set) */ };
 220         int i;
 221         u_char ether_address_backup[ETHER_ADDR_LEN];
 222
 223         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 224                 ether_address_backup[i] = sc->arpcom.ac_enaddr[i];
 225         }
 226
 227         cs_writereg(sc->nic_addr, PP_LineCTL,
 228                 cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_TX_ON );
 229         bcopy(test_packet,
 230                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 231         bcopy(test_packet+ETHER_ADDR_LEN,
 232                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 233         outw(sc->nic_addr + TX_CMD_PORT, sc->send_cmd);
 234         outw(sc->nic_addr + TX_LEN_PORT, sizeof(test_packet));
 235
 236         /* Wait for chip to allocate memory */
 237         DELAY(50000);
 238         if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
 239                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 240                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 241                 }
 242                 return 0;
 243         }
 244
 245         outsw(sc->nic_addr + TX_FRAME_PORT, test_packet, sizeof(test_packet));
 246
 247         DELAY(30000);
 248
 249         if ((cs_readreg(sc->nic_addr,PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
 250                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 251                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 252                 }
 253                 return 1;
 254         }
 255         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 256                 sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 257         }
 258         return 0;
 259 }
 260
 261 /*
 262  * XXX This was rewritten from Linux driver without any tests.
 263  */
 264 static int
 265 enable_aui(struct cs_softc *sc)
 266 {
 267         control_dc_dc(sc, 0);
 268         cs_writereg(sc->nic_addr, PP_LineCTL,
 269                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 270
 271         if (!send_test_pkt(sc)) {
 272                 if_printf(&sc->arpcom.ac_if, "failed to enable AUI\n");
 273                 return EINVAL;
 274         }
 275         return 0;
 276 }
 277
 278 /*
 279  * XXX This was rewritten from Linux driver without any tests.
 280  */
 281 static int
 282 enable_bnc(struct cs_softc *sc)
 283 {
 284         control_dc_dc(sc, 1);
 285         cs_writereg(sc->nic_addr, PP_LineCTL,
 286                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 287
 288         if (!send_test_pkt(sc)) {
 289                 if_printf(&sc->arpcom.ac_if, "failed to enable BNC\n");
 290                 return EINVAL;
 291         }
 292         return 0;
 293 }
 294
 295 int
 296 cs_cs89x0_probe(device_t dev)
 297 {
 298         int i;
 299         int iobase;
 300         int error;
 301
 302         u_long irq, junk;
 303
 304         struct cs_softc *sc = device_get_softc(dev);
 305
 306         unsigned rev_type = 0;
 307         char chip_revision;
 308         int eeprom_buff[CHKSUM_LEN];
 309         int chip_type, pp_isaint, pp_isadma;
 310
 311         error = cs_alloc_port(dev, 0, CS_89x0_IO_PORTS);
 312         if (error)
 313                 return (error);
 314
 315         iobase=rman_get_start(sc->port_res);
 316
 317         if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG) {
 318                 /* Chip not detected. Let's try to reset it */
 319                 if (bootverbose)
 320                         device_printf(dev, "trying to reset the chip.\n");
 321                 outw(iobase+ADD_PORT, PP_SelfCTL);
 322                 i = inw(iobase+DATA_PORT);
 323                 outw(iobase+ADD_PORT, PP_SelfCTL);
 324                 outw(iobase+DATA_PORT, i | POWER_ON_RESET);
 325                 if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG)
 326                         return (ENXIO);
 327         }
 328
 329         outw(iobase+ADD_PORT, PP_ChipID);
 330         if (inw(iobase+DATA_PORT) != CHIP_EISA_ID_SIG)
 331                 return (ENXIO);
 332
 333         rev_type = cs_readreg(iobase, PRODUCT_ID_ADD);
 334         chip_type = rev_type & ~REVISON_BITS;
 335         chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 336
 337         sc->nic_addr = iobase;
 338         sc->chip_type = chip_type;
 339
 340         if(chip_type==CS8900) {
 341                 pp_isaint = PP_CS8900_ISAINT;
 342                 pp_isadma = PP_CS8900_ISADMA;
 343                 sc->send_cmd = TX_CS8900_AFTER_ALL;
 344         } else {
 345                 pp_isaint = PP_CS8920_ISAINT;
 346                 pp_isadma = PP_CS8920_ISADMA;
 347                 sc->send_cmd = TX_CS8920_AFTER_ALL;
 348         }
 349
 350         /*
 351          * Clear some fields so that fail of EEPROM will left them clean
 352          */
 353         sc->auto_neg_cnf = 0;
 354         sc->adapter_cnf  = 0;
 355         sc->isa_config   = 0;
 356
 357         /*
 358          * If no interrupt specified (or "?"), use what the board tells us.
 359          */
 360         error = bus_get_resource(dev, SYS_RES_IRQ, 0, &irq, &junk);
 361
 362         /*
 363          * Get data from EEPROM
 364          */
 365         if((cs_readreg(iobase, PP_SelfST) & EEPROM_PRESENT) == 0) {
 366                 device_printf(dev, "No EEPROM, assuming defaults.\n");
 367         } else {
 368                 if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN,
 369                                     eeprom_buff)<0) {
 370                         device_printf(dev, "EEPROM read failed, "
 371                                 "assuming defaults.\n");
 372                 } else {
 373                         if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
 374                                 device_printf(dev, "EEPROM cheksum bad, "
 375                                         "assuming defaults.\n");
 376                         } else {
 377                                 sc->auto_neg_cnf =
 378                                         eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
 379                                 sc->adapter_cnf =
 380                                         eeprom_buff[ADAPTER_CNF_OFFSET/2];
 381                                 sc->isa_config =
 382                                         eeprom_buff[ISA_CNF_OFFSET/2];
 383
 384                                 for (i=0; i<ETHER_ADDR_LEN/2; i++) {
 385                                         sc->arpcom.ac_enaddr[i*2]=
 386                                                 eeprom_buff[i];
 387                                         sc->arpcom.ac_enaddr[i*2+1]=
 388                                                 eeprom_buff[i] >> 8;
 389                                 }
 390
 391                                 /*
 392                                  * If no interrupt specified (or "?"),
 393                                  * use what the board tells us.
 394                                  */
 395                                 if (error) {
 396                                         irq = sc->isa_config & INT_NO_MASK;
 397                                         if (chip_type==CS8900) {
 398                                                 switch(irq) {
 399                                                  case 0:
 400                                                         irq=10;
 401                                                         error=0;
 402                                                         break;
 403                                                  case 1:
 404                                                         irq=11;
 405                                                         error=0;
 406                                                         break;
 407                                                  case 2:
 408                                                         irq=12;
 409                                                         error=0;
 410                                                         break;
 411                                                  case 3:
 412                                                         irq=5;
 413                                                         error=0;
 414                                                         break;
 415                                                  default:
 416                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 417                                                         error=EINVAL;
 418                                                 }
 419                                         } else {
 420                                                 if (irq>CS8920_NO_INTS) {
 421                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 422                                                         error=EINVAL;
 423                                                 } else {
 424                                                         error=0;
 425                                                 }
 426                                         }
 427
 428                                         if (!error) {
 429                                                 bus_set_resource(dev, SYS_RES_IRQ, 0,
 430                                                     irq, 1, machintr_intr_cpuid(irq));
 431                                         }
 432                                 }
 433                         }
 434                 }
 435         }
 436
 437         if (!error) {
 438                 if (chip_type == CS8900) {
 439                         switch(irq) {
 440                                 case  5:
 441                                         irq = 3;
 442                                         break;
 443                                 case 10:
 444                                         irq = 0;
 445                                         break;
 446                                 case 11:
 447                                         irq = 1;
 448                                         break;
 449                                 case 12:
 450                                         irq = 2;
 451                                         break;
 452                                 default:
 453                                         error=EINVAL;
 454                         }
 455                 } else {
 456                         if (irq > CS8920_NO_INTS) {
 457                                 error = EINVAL;
 458                         }
 459                 }
 460         }
 461
 462         if (!error) {
 463                 cs_writereg(iobase, pp_isaint, irq);
 464         } else {
 465                 device_printf(dev, "Unknown or invalid irq\n");
 466                 return (ENXIO);
 467         }
 468
 469         /*
 470          * Temporary disabled
 471          *
 472         if (drq>0)
 473                 cs_writereg(iobase, pp_isadma, drq);
 474         else {
 475                 device_printf(dev, "incorrect drq\n");
 476                 return 0;
 477         }
 478         */
 479
 480         if (bootverbose)
 481                  device_printf(dev, "CS89%c0%s rev %c media%s%s%s\n",
 482                         chip_type==CS8900 ? '0' : '2',
 483                         chip_type==CS8920M ? "M" : "",
 484                         chip_revision,
 485                         (sc->adapter_cnf & A_CNF_10B_T) ? " TP"  : "",
 486                         (sc->adapter_cnf & A_CNF_AUI)   ? " AUI" : "",
 487                         (sc->adapter_cnf & A_CNF_10B_2) ? " BNC" : "");
 488
 489         if ((sc->adapter_cnf & A_CNF_EXTND_10B_2) &&
 490             (sc->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
 491                 sc->line_ctl = LOW_RX_SQUELCH;
 492         else
 493                 sc->line_ctl = 0;
 494
 495
 496         return 0;
 497 }
 498
 499 /*
 500  * Allocate a port resource with the given resource id.
 501  */
 502 int
 503 cs_alloc_port(device_t dev, int rid, int size)
 504 {
 505         struct cs_softc *sc = device_get_softc(dev);
 506         struct resource *res;
 507
 508         res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 509                                  0ul, ~0ul, size, RF_ACTIVE);
 510         if (res) {
 511                 sc->port_rid = rid;
 512                 sc->port_res = res;
 513                 sc->port_used = size;
 514                 return (0);
 515         } else {
 516                 return (ENOENT);
 517         }
 518 }
 519
 520 /*
 521  * Allocate a memory resource with the given resource id.
 522  */
 523 int
 524 cs_alloc_memory(device_t dev, int rid, int size)
 525 {
 526         struct cs_softc *sc = device_get_softc(dev);
 527         struct resource *res;
 528
 529         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
 530                                  0ul, ~0ul, size, RF_ACTIVE);
 531         if (res) {
 532                 sc->mem_rid = rid;
 533                 sc->mem_res = res;
 534                 sc->mem_used = size;
 535                 return (0);
 536         } else {
 537                 return (ENOENT);
 538         }
 539 }
 540
 541 /*
 542  * Allocate an irq resource with the given resource id.
 543  */
 544 int
 545 cs_alloc_irq(device_t dev, int rid, int flags)
 546 {
 547         struct cs_softc *sc = device_get_softc(dev);
 548         struct resource *res;
 549
 550         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
 551             (RF_ACTIVE | flags));
 552         if (res) {
 553                 sc->irq_rid = rid;
 554                 sc->irq_res = res;
 555                 return (0);
 556         } else {
 557                 return (ENOENT);
 558         }
 559 }
 560
 561 /*
 562  * Release all resources
 563  */
 564 void
 565 cs_release_resources(device_t dev)
 566 {
 567         struct cs_softc *sc = device_get_softc(dev);
 568
 569         if (sc->port_res) {
 570                 bus_release_resource(dev, SYS_RES_IOPORT,
 571                                      sc->port_rid, sc->port_res);
 572                 sc->port_res = 0;
 573         }
 574         if (sc->mem_res) {
 575                 bus_release_resource(dev, SYS_RES_MEMORY,
 576                                      sc->mem_rid, sc->mem_res);
 577                 sc->mem_res = 0;
 578         }
 579         if (sc->irq_res) {
 580                 bus_release_resource(dev, SYS_RES_IRQ,
 581                                      sc->irq_rid, sc->irq_res);
 582                 sc->irq_res = 0;
 583         }
 584 }
 585
 586 /*
 587  * Install the interface into kernel networking data structures
 588  */
 589 int
 590 cs_attach(device_t dev)
 591 {
 592         struct cs_softc *sc = device_get_softc(dev);
 593         int media = 0, error;
 594         struct ifnet *ifp = &sc->arpcom.ac_if;
 595
 596         /*
 597          * Initialize the media structures.
 598          */
 599         ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
 600
 601         KASSERT(sc->port_used > 0 || sc->mem_used > 0,
 602                 ("%s: either I/O port or I/O memory should be used",
 603                  device_get_nameunit(dev)));
 604         if (sc->port_used > 0)
 605                 cs_alloc_port(dev, sc->port_rid, sc->port_used);
 606         if (sc->mem_used > 0)
 607                 cs_alloc_memory(dev, sc->mem_rid, sc->mem_used);
 608
 609         error = cs_alloc_irq(dev, sc->irq_rid, 0);
 610         if (error) {
 611                 device_printf(dev, "Couldn't allocate irq");
 612                 goto bad;
 613         }
 614
 615         cs_stop(sc);
 616
 617         ifp->if_softc=sc;
 618         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 619         ifp->if_start=cs_start;
 620         ifp->if_ioctl=cs_ioctl;
 621         ifp->if_watchdog=cs_watchdog;
 622         ifp->if_init=cs_init;
 623         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 624         ifq_set_ready(&ifp->if_snd);
 625
 626 #if 0
 627         /*
 628          *  MIB DATA
 629          */
 630         ifp->if_linkmib=&sc->mibdata;
 631         ifp->if_linkmiblen=sizeof sc->mibdata;
 632 #endif
 633
 634         ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST );
 635
 636 #if 0
 637         /*
 638          * this code still in progress (DMA support)
 639          */
 640         sc->recv_ring=kmalloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_WAITOK);
 641         if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
 642             < (128*1024-CS_DMA_BUFFER_SIZE))
 643             sc->recv_ring+=16*1024;
 644 #endif
 645
 646         sc->buffer=kmalloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_WAITOK);
 647
 648         if (sc->adapter_cnf & A_CNF_10B_T) {
 649                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
 650                 if (sc->chip_type != CS8900) {
 651                         ifmedia_add(&sc->media,
 652                                 IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
 653                         ifmedia_add(&sc->media,
 654                                 IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
 655                 }
 656         }
 657
 658         if (sc->adapter_cnf & A_CNF_10B_2)
 659                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
 660
 661         if (sc->adapter_cnf & A_CNF_AUI)
 662                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
 663
 664         if (sc->adapter_cnf & A_CNF_MEDIA)
 665                 ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
 666
 667         /* Set default media from EEPROM */
 668         switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
 669         case A_CNF_MEDIA_AUTO:  media = IFM_ETHER|IFM_AUTO; break;
 670         case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
 671         case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
 672         case A_CNF_MEDIA_AUI:   media = IFM_ETHER|IFM_10_5; break;
 673         default: device_printf(dev, "adapter has no media\n");
 674         }
 675         ifmedia_set(&sc->media, media);
 676         cs_mediaset(sc, media);
 677
 678         ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
 679
 680         error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
 681                                csintr, sc, &sc->irq_handle,
 682                                ifp->if_serializer);
 683         if (error) {
 684                 device_printf(dev, "Couldn't set up irq");
 685                 ether_ifdetach(ifp);
 686                 goto bad;
 687         }
 688
 689         ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->irq_res));
 690         KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus);
 691
 692         return 0;
 693
 694 bad:
 695         cs_detach(dev);
 696         return error;
 697 }
 698
 699 int
 700 cs_detach(device_t dev)
 701 {
 702         struct cs_softc *sc = device_get_softc(dev);
 703         struct ifnet *ifp = &sc->arpcom.ac_if;
 704
 705         if (device_is_attached(dev)) {
 706                 lwkt_serialize_enter(ifp->if_serializer);
 707                 cs_stop(sc);
 708                 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 709                 lwkt_serialize_exit(ifp->if_serializer);
 710
 711                 ether_ifdetach(&sc->arpcom.ac_if);
 712         }
 713
 714 #if 0
 715         /*
 716          * this code still in progress (DMA support)
 717          */
 718         if (sc->recv_ring != NULL)
 719                 kfree(sc->recv_ring, M_DEVBUF);
 720 #endif
 721
 722         if (sc->buffer != NULL)
 723                 kfree(sc->buffer, M_DEVBUF);
 724         cs_release_resources(dev);
 725         ifmedia_removeall(&sc->media);
 726
 727         return 0;
 728 }
 729
 730 /*
 731  * Initialize the board
 732  */
 733 static void
 734 cs_init(void *xsc)
 735 {
 736         struct cs_softc *sc=(struct cs_softc *)xsc;
 737         struct ifnet *ifp = &sc->arpcom.ac_if;
 738         int i, rx_cfg;
 739
 740         /*
 741          * reset whatchdog timer
 742          */
 743         ifp->if_timer=0;
 744         sc->buf_len = 0;
 745
 746         /*
 747          * Hardware initialization of cs
 748          */
 749
 750         /* Enable receiver and transmitter */
 751         cs_writereg(sc->nic_addr, PP_LineCTL,
 752                 cs_readreg( sc->nic_addr, PP_LineCTL ) |
 753                 SERIAL_RX_ON | SERIAL_TX_ON);
 754
 755         /* Configure the receiver mode */
 756         cs_setmode(sc);
 757
 758         /*
 759          * This defines what type of frames will cause interrupts
 760          * Bad frames should generate interrupts so that the driver
 761          * could track statistics of discarded packets
 762          */
 763         rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
 764                  RX_EXTRA_DATA_ENBL;
 765         if (sc->isa_config & STREAM_TRANSFER)
 766                 rx_cfg |= RX_STREAM_ENBL;
 767         cs_writereg(sc->nic_addr, PP_RxCFG, rx_cfg);
 768
 769         cs_writereg(sc->nic_addr, PP_TxCFG, TX_LOST_CRS_ENBL |
 770                     TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
 771                     TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 772
 773         cs_writereg(sc->nic_addr, PP_BufCFG, READY_FOR_TX_ENBL |
 774                     RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
 775                     TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
 776
 777         /* Write MAC address into IA filter */
 778         for (i=0; i<ETHER_ADDR_LEN/2; i++)
 779                 cs_writereg(sc->nic_addr, PP_IA+i*2,
 780                             sc->arpcom.ac_enaddr[i*2] |
 781                             (sc->arpcom.ac_enaddr[i*2+1] << 8) );
 782
 783         /*
 784          * Now enable everything
 785          */
 786 /*
 787 #ifdef  CS_USE_64K_DMA
 788         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
 789         #else
 790
 791         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 792 #endif
 793 */
 794         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 795
 796         /*
 797          * Set running and clear output active flags
 798          */
 799         sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
 800         sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
 801
 802         /*
 803          * Start sending process
 804          */
 805         if_devstart(&sc->arpcom.ac_if);
 806 }
 807
 808 /*
 809  * Get the packet from the board and send it to the upper layer
 810  * via ether_input().
 811  */
 812 static int
 813 cs_get_packet(struct cs_softc *sc)
 814 {
 815         struct ifnet *ifp = &(sc->arpcom.ac_if);
 816         int iobase = sc->nic_addr, status, length;
 817         struct mbuf *m;
 818
 819 #ifdef CS_DEBUG
 820         int i;
 821 #endif
 822
 823         status = inw(iobase + RX_FRAME_PORT);
 824         length = inw(iobase + RX_FRAME_PORT);
 825
 826 #ifdef CS_DEBUG
 827         if_printf(ifp, "rcvd: stat %x, len %d\n", status, length);
 828 #endif
 829
 830         if (!(status & RX_OK)) {
 831 #ifdef CS_DEBUG
 832                 if_printf(ifp, "bad pkt stat %x\n", status);
 833 #endif
 834                 ifp->if_ierrors++;
 835                 return -1;
 836         }
 837
 838         MGETHDR(m, MB_DONTWAIT, MT_DATA);
 839         if (m==NULL)
 840                 return -1;
 841
 842         if (length > MHLEN) {
 843                 MCLGET(m, MB_DONTWAIT);
 844                 if (!(m->m_flags & M_EXT)) {
 845                         m_freem(m);
 846                         return -1;
 847                 }
 848         }
 849
 850         /* Initialize packet's header info */
 851         m->m_pkthdr.rcvif = ifp;
 852         m->m_pkthdr.len = length;
 853         m->m_len = length;
 854
 855         /* Get the data */
 856         insw(iobase + RX_FRAME_PORT, m->m_data, (length+1)>>1);
 857
 858 #ifdef CS_DEBUG
 859         for (i=0;i<length;i++)
 860              kprintf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
 861         kprintf( "\n" );
 862 #endif
 863
 864         if (status & (RX_IA | RX_BROADCAST) ||
 865             (ifp->if_flags & IFF_MULTICAST && status & RX_HASHED)) {
 866                 ifp->if_input(ifp, m);
 867
 868                 ifp->if_ipackets++;
 869
 870                 if (length==ETHER_MAX_LEN-ETHER_CRC_LEN)
 871                         DELAY( cs_recv_delay );
 872         } else {
 873                 m_freem(m);
 874         }
 875
 876         return 0;
 877 }
 878
 879 /*
 880  * Handle interrupts
 881  */
 882 static void
 883 csintr(void *arg)
 884 {
 885         struct cs_softc *sc = (struct cs_softc*) arg;
 886         struct ifnet *ifp = &(sc->arpcom.ac_if);
 887         int status;
 888
 889 #ifdef CS_DEBUG
 890         if_printf(ifp, "Interrupt.\n");
 891 #endif
 892
 893         while ((status=cs_readword(sc->nic_addr, ISQ_PORT))) {
 894
 895 #ifdef CS_DEBUG
 896                 if_printf(ifp, "from ISQ: %04x\n", status);
 897 #endif
 898
 899                 switch (status & ISQ_EVENT_MASK) {
 900                 case ISQ_RECEIVER_EVENT:
 901                         cs_get_packet(sc);
 902                         break;
 903
 904                 case ISQ_TRANSMITTER_EVENT:
 905                         if (status & TX_OK)
 906                                 ifp->if_opackets++;
 907                         else
 908                                 ifp->if_oerrors++;
 909                         ifp->if_flags &= ~IFF_OACTIVE;
 910                         ifp->if_timer = 0;
 911                         break;
 912
 913                 case ISQ_BUFFER_EVENT:
 914                         if (status & READY_FOR_TX) {
 915                                 ifp->if_flags &= ~IFF_OACTIVE;
 916                                 ifp->if_timer = 0;
 917                         }
 918
 919                         if (status & TX_UNDERRUN) {
 920                                 ifp->if_flags &= ~IFF_OACTIVE;
 921                                 ifp->if_timer = 0;
 922                                 ifp->if_oerrors++;
 923                         }
 924                         break;
 925
 926                 case ISQ_RX_MISS_EVENT:
 927                         ifp->if_ierrors+=(status>>6);
 928                         break;
 929
 930                 case ISQ_TX_COL_EVENT:
 931                         ifp->if_collisions+=(status>>6);
 932                         break;
 933                 }
 934         }
 935
 936         if (!(ifp->if_flags & IFF_OACTIVE))
 937                 if_devstart(ifp);
 938 }
 939
 940 /*
 941  * Save the data in buffer
 942  */
 943
 944 static void
 945 cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
 946 {
 947         int len;
 948         struct mbuf *mp;
 949         unsigned char *data, *buf;
 950
 951         for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
 952                 len = mp->m_len;
 953
 954                 /*
 955                  * Ignore empty parts
 956                  */
 957                 if (!len)
 958                         continue;
 959
 960                 /*
 961                  * Find actual data address
 962                  */
 963                 data = mtod(mp, caddr_t);
 964
 965                 bcopy((caddr_t) data, (caddr_t) buf, len);
 966                 buf += len;
 967                 sc->buf_len += len;
 968         }
 969 }
 970
 971
 972 static void
 973 cs_xmit_buf( struct cs_softc *sc )
 974 {
 975         outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
 976         sc->buf_len = 0;
 977 }
 978
 979 static void
 980 cs_start(struct ifnet *ifp)
 981 {
 982         int length;
 983         struct mbuf *m, *mp;
 984         struct cs_softc *sc = ifp->if_softc;
 985
 986         for (;;) {
 987                 if (sc->buf_len)
 988                         length = sc->buf_len;
 989                 else {
 990                         m = ifq_dequeue(&ifp->if_snd, NULL);
 991
 992                         if (m==NULL) {
 993                                 return;
 994                         }
 995
 996                         for (length=0, mp=m; mp != NULL; mp=mp->m_next)
 997                                 length += mp->m_len;
 998
 999                         /* Skip zero-length packets */
1000                         if (length == 0) {
1001                                 m_freem(m);
1002                                 continue;
1003                         }
1004
1005                         cs_write_mbufs(sc, m);
1006
1007                         BPF_MTAP(ifp, m);
1008
1009                         m_freem(m);
1010                 }
1011
1012                 /*
1013                  * Issue a SEND command
1014                  */
1015                 outw(sc->nic_addr+TX_CMD_PORT, sc->send_cmd);
1016                 outw(sc->nic_addr+TX_LEN_PORT, length );
1017
1018                 /*
1019                  * If there's no free space in the buffer then leave
1020                  * this packet for the next time: indicate output active
1021                  * and return.
1022                  */
1023                 if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
1024                         ifp->if_timer = sc->buf_len;
1025                         ifp->if_flags |= IFF_OACTIVE;
1026                         return;
1027                 }
1028
1029                 cs_xmit_buf(sc);
1030
1031                 /*
1032                  * Set the watchdog timer in case we never hear
1033                  * from board again. (I don't know about correct
1034                  * value for this timeout)
1035                  */
1036                 ifp->if_timer = length;
1037
1038                 ifp->if_flags |= IFF_OACTIVE;
1039                 return;
1040         }
1041 }
1042
1043 /*
1044  * Stop everything on the interface
1045  */
1046 static void
1047 cs_stop(struct cs_softc *sc)
1048 {
1049         cs_writereg(sc->nic_addr, PP_RxCFG, 0);
1050         cs_writereg(sc->nic_addr, PP_TxCFG, 0);
1051         cs_writereg(sc->nic_addr, PP_BufCFG, 0);
1052         cs_writereg(sc->nic_addr, PP_BusCTL, 0);
1053
1054         sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1055         sc->arpcom.ac_if.if_timer = 0;
1056 }
1057
1058 /*
1059  * Reset the interface
1060  */
1061 static void
1062 cs_reset(struct cs_softc *sc)
1063 {
1064         cs_stop(sc);
1065         cs_init(sc);
1066 }
1067
1068 static void
1069 cs_setmode(struct cs_softc *sc)
1070 {
1071         struct ifnet *ifp = &(sc->arpcom.ac_if);
1072         int rx_ctl;
1073
1074         /* Stop the receiver while changing filters */
1075         cs_writereg(sc->nic_addr, PP_LineCTL,
1076                         cs_readreg(sc->nic_addr, PP_LineCTL) & ~SERIAL_RX_ON);
1077
1078         if (ifp->if_flags & IFF_PROMISC) {
1079                 /* Turn on promiscuous mode. */
1080                 rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
1081         } else {
1082                 if (ifp->if_flags & IFF_MULTICAST) {
1083                         /* Allow receiving frames with multicast addresses */
1084                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1085                                  RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
1086                         /*
1087                          * Here the reconfiguration of chip's multicast
1088                          * filters should be done but I've no idea about
1089                          * hash transformation in this chip. If you can
1090                          * add this code or describe me the transformation
1091                          * I'd be very glad.
1092                          */
1093                 } else {
1094                         /*
1095                          * Receive only good frames addressed for us and
1096                          * good broadcasts.
1097                          */
1098                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1099                                  RX_OK_ACCEPT;
1100                 }
1101         }
1102
1103         /* Set up the filter */
1104         cs_writereg(sc->nic_addr, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
1105
1106         /* Turn on receiver */
1107         cs_writereg(sc->nic_addr, PP_LineCTL,
1108                         cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_RX_ON);
1109 }
1110
1111 static int
1112 cs_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1113 {
1114         struct cs_softc *sc=ifp->if_softc;
1115         struct ifreq *ifr = (struct ifreq *)data;
1116         int error=0;
1117
1118 #ifdef CS_DEBUG
1119         if_printf(ifp, "ioctl(%lx)\n", command);
1120 #endif
1121
1122         switch (command) {
1123         case SIOCSIFFLAGS:
1124                 /*
1125                  * Switch interface state between "running" and
1126                  * "stopped", reflecting the UP flag.
1127                  */
1128                 if (sc->arpcom.ac_if.if_flags & IFF_UP) {
1129                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
1130                                 cs_init(sc);
1131                         }
1132                 } else {
1133                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
1134                                 cs_stop(sc);
1135                         }
1136                 }
1137                 /*
1138                  * Promiscuous and/or multicast flags may have changed,
1139                  * so reprogram the multicast filter and/or receive mode.
1140                  *
1141                  * See note about multicasts in cs_setmode
1142                  */
1143                 cs_setmode(sc);
1144                 break;
1145
1146         case SIOCADDMULTI:
1147         case SIOCDELMULTI:
1148             /*
1149              * Multicast list has changed; set the hardware filter
1150              * accordingly.
1151              *
1152              * See note about multicasts in cs_setmode
1153              */
1154             cs_setmode(sc);
1155             error = 0;
1156             break;
1157
1158         case SIOCSIFMEDIA:
1159         case SIOCGIFMEDIA:
1160                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1161                 break;
1162         default:
1163                 error = ether_ioctl(ifp, command, data);
1164                 break;
1165         }
1166
1167         return error;
1168 }
1169
1170 /*
1171  * Device timeout/watchdog routine. Entered if the device neglects to
1172  * generate an interrupt after a transmit has been started on it.
1173  */
1174 static void
1175 cs_watchdog(struct ifnet *ifp)
1176 {
1177         struct cs_softc *sc = ifp->if_softc;
1178
1179         ifp->if_oerrors++;
1180         log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
1181
1182         /* Reset the interface */
1183         if (ifp->if_flags & IFF_UP)
1184                 cs_reset(sc);
1185         else
1186                 cs_stop(sc);
1187 }
1188
1189 static int
1190 cs_mediachange(struct ifnet *ifp)
1191 {
1192         struct cs_softc *sc = ifp->if_softc;
1193         struct ifmedia *ifm = &sc->media;
1194
1195         if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1196                 return EINVAL;
1197
1198         return cs_mediaset(sc, ifm->ifm_media);
1199 }
1200
1201 static void
1202 cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
1203 {
1204         int line_status;
1205         struct cs_softc *sc = ifp->if_softc;
1206
1207         ifmr->ifm_active = IFM_ETHER;
1208         line_status = cs_readreg(sc->nic_addr, PP_LineST);
1209         if (line_status & TENBASET_ON) {
1210                 ifmr->ifm_active |= IFM_10_T;
1211                 if (sc->chip_type != CS8900) {
1212                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & FDX_ACTIVE)
1213                                 ifmr->ifm_active |= IFM_FDX;
1214                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & HDX_ACTIVE)
1215                                 ifmr->ifm_active |= IFM_HDX;
1216                 }
1217                 ifmr->ifm_status = IFM_AVALID;
1218                 if (line_status & LINK_OK)
1219                         ifmr->ifm_status |= IFM_ACTIVE;
1220         } else {
1221                 if (line_status & AUI_ON) {
1222                         cs_writereg(sc->nic_addr, PP_SelfCTL,
1223                                     cs_readreg(sc->nic_addr, PP_SelfCTL) |
1224                                     HCB1_ENBL);
1225                         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
1226                             (cs_readreg(sc->nic_addr, PP_SelfCTL)&HCB1))
1227                                 ifmr->ifm_active |= IFM_10_2;
1228                         else
1229                                 ifmr->ifm_active |= IFM_10_5;
1230                 }
1231         }
1232 }
1233
1234 static int
1235 cs_mediaset(struct cs_softc *sc, int media)
1236 {
1237         int error;
1238
1239         /* Stop the receiver & transmitter */
1240         cs_writereg(sc->nic_addr, PP_LineCTL,
1241                     cs_readreg(sc->nic_addr, PP_LineCTL) &
1242                     ~(SERIAL_RX_ON | SERIAL_TX_ON));
1243
1244 #ifdef CS_DEBUG
1245         if_printf(&sc->arpcom.ac_if, "cs_setmedia(%x)\n", media);
1246 #endif
1247
1248         switch (IFM_SUBTYPE(media)) {
1249         default:
1250         case IFM_AUTO:
1251                 if ((error=enable_tp(sc))==0)
1252                         error = cs_duplex_auto(sc);
1253                 else if ((error=enable_bnc(sc)) != 0)
1254                         error = enable_aui(sc);
1255                 break;
1256         case IFM_10_T:
1257                 if ((error=enable_tp(sc)) != 0)
1258                         break;
1259                 if (media & IFM_FDX)
1260                         cs_duplex_full(sc);
1261                 else if (media & IFM_HDX)
1262                         cs_duplex_half(sc);
1263                 else
1264                         error = cs_duplex_auto(sc);
1265                 break;
1266         case IFM_10_2:
1267                 error = enable_bnc(sc);
1268                 break;
1269         case IFM_10_5:
1270                 error = enable_aui(sc);
1271                 break;
1272         }
1273
1274         /*
1275          * Turn the transmitter & receiver back on
1276          */
1277         cs_writereg(sc->nic_addr, PP_LineCTL,
1278                     cs_readreg( sc->nic_addr, PP_LineCTL ) |
1279                     SERIAL_RX_ON | SERIAL_TX_ON);
1280
1281         return error;
1282 }