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  */
  28
  29 /*
  30  * $FreeBSD: src/sys/dev/cs/if_cs.c,v 1.19.2.1 2001/01/25 20:13:48 imp Exp $
  31  * $DragonFly: src/sys/dev/netif/cs/if_cs.c,v 1.7 2004/03/23 22:18:59 hsu Exp $
  32  *
  33  * Device driver for Crystal Semiconductor CS8920 based ethernet
  34  *   adapters. By Maxim Bolotin and Oleg Sharoiko, 27-April-1997
  35  */
  36
  37 /*
  38 #define  CS_DEBUG
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/malloc.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/socket.h>
  46 #include <sys/sockio.h>
  47 #include <sys/kernel.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/syslog.h>
  50
  51 #include <sys/module.h>
  52 #include <sys/bus.h>
  53 #include <machine/bus.h>
  54 #include <sys/rman.h>
  55 #include <machine/resource.h>
  56 #include <machine/clock.h>
  57
  58 #include <net/if.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
  83 static int      cs_mediachange(struct ifnet *);
  84 static void     cs_mediastatus(struct ifnet *, struct ifmediareq *);
  85 static int      cs_mediaset(struct cs_softc *, int);
  86
  87 static void     cs_write_mbufs(struct cs_softc*, struct mbuf*);
  88 static void     cs_xmit_buf(struct cs_softc*);
  89 static int      cs_get_packet(struct cs_softc*);
  90 static void     cs_setmode(struct cs_softc*);
  91
  92 static int      get_eeprom_data(struct cs_softc *sc, int, int, int *);
  93 static int      get_eeprom_cksum(int, int, int *);
  94 static int      wait_eeprom_ready( struct cs_softc *);
  95 static void     control_dc_dc(struct cs_softc *, int );
  96 static int      send_test_pkt(struct cs_softc * );
  97 static int      enable_tp(struct cs_softc *);
  98 static int      enable_aui(struct cs_softc *);
  99 static int      enable_bnc(struct cs_softc *);
 100 static int      cs_duplex_auto(struct cs_softc *);
 101
 102 devclass_t cs_devclass;
 103
 104 DECLARE_DUMMY_MODULE(if_cs);
 105
 106 static int
 107 get_eeprom_data( struct cs_softc *sc, int off, int len, int *buffer)
 108 {
 109         int i;
 110
 111 #ifdef CS_DEBUG
 112         printf(CS_NAME":EEPROM data from %x for %x:\n", off,len);
 113 #endif
 114
 115         for (i=0;i<len;i++) {
 116                 if (wait_eeprom_ready(sc) < 0) return -1;
 117                 /* Send command to EEPROM to read */
 118                 cs_writereg(sc->nic_addr, PP_EECMD, (off+i)|EEPROM_READ_CMD );
 119                 if (wait_eeprom_ready(sc)<0)
 120                         return -1;
 121                 buffer[i] = cs_readreg (sc->nic_addr, PP_EEData);
 122
 123 #ifdef CS_DEBUG
 124                 printf("%02x %02x ",(unsigned char)buffer[i],
 125                                         (unsigned char)buffer[i+1]);
 126 #endif
 127         }
 128
 129 #ifdef CS_DEBUG
 130         printf("\n");
 131 #endif
 132
 133         return 0;
 134 }
 135
 136 static int
 137 get_eeprom_cksum(int off, int len, int *buffer)
 138 {
 139         int i,cksum=0;
 140
 141         for (i=0;i<len;i++)
 142                 cksum+=buffer[i];
 143         cksum &= 0xffff;
 144         if (cksum==0)
 145                 return 0;
 146         return -1;
 147 }
 148
 149 static int
 150 wait_eeprom_ready(struct cs_softc *sc)
 151 {
 152         DELAY ( 30000 );        /* XXX should we do some checks here ? */
 153         return 0;
 154 }
 155
 156 static void
 157 control_dc_dc(struct cs_softc *sc, int on_not_off)
 158 {
 159         unsigned int self_control = HCB1_ENBL;
 160
 161         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0) ^ on_not_off)
 162                 self_control |= HCB1;
 163         else
 164                 self_control &= ~HCB1;
 165         cs_writereg( sc->nic_addr, PP_SelfCTL, self_control );
 166
 167         DELAY( 500000 );
 168 }
 169
 170
 171 static int
 172 cs_duplex_auto(struct cs_softc *sc)
 173 {
 174         int i, error=0;
 175
 176         cs_writereg(sc->nic_addr, PP_AutoNegCTL,
 177                     RE_NEG_NOW | ALLOW_FDX | AUTO_NEG_ENABLE );
 178         for (i=0; cs_readreg(sc->nic_addr,PP_AutoNegST)&AUTO_NEG_BUSY; i++) {
 179                 if (i > 40000) {
 180                         printf("%s: full/half duplex "
 181                                "auto negotiation timeout\n",
 182                                sc->arpcom.ac_if.if_xname);
 183                         error = ETIMEDOUT;
 184                         break;
 185                 }
 186                 DELAY(1000);
 187         }
 188         DELAY( 1000000 );
 189         return error;
 190 }
 191
 192 static int
 193 enable_tp(struct cs_softc *sc)
 194 {
 195         cs_writereg(sc->nic_addr, PP_LineCTL, sc->line_ctl & ~AUI_ONLY);
 196         control_dc_dc(sc, 0);
 197         DELAY( 150000 );
 198
 199         if ((cs_readreg(sc->nic_addr, PP_LineST) & LINK_OK)==0) {
 200                 printf("%s: failed to enable TP\n",
 201                     sc->arpcom.ac_if.if_xname);
 202                 return EINVAL;
 203         }
 204
 205         return 0;
 206 }
 207
 208 /*
 209  * XXX This was rewritten from Linux driver without any tests.
 210  */
 211 static int
 212 send_test_pkt(struct cs_softc *sc)
 213 {
 214         char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
 215                                 0, 46,  /* A 46 in network order */
 216                                 0, 0,   /* DSAP=0 & SSAP=0 fields */
 217                                 0xf3, 0 /* Control (Test Req + P bit set) */ };
 218         int i;
 219         u_char ether_address_backup[ETHER_ADDR_LEN];
 220
 221         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 222                 ether_address_backup[i] = sc->arpcom.ac_enaddr[i];
 223         }
 224
 225         cs_writereg(sc->nic_addr, PP_LineCTL,
 226                 cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_TX_ON );
 227         bcopy(test_packet,
 228                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 229         bcopy(test_packet+ETHER_ADDR_LEN,
 230                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 231         outw(sc->nic_addr + TX_CMD_PORT, sc->send_cmd);
 232         outw(sc->nic_addr + TX_LEN_PORT, sizeof(test_packet));
 233
 234         /* Wait for chip to allocate memory */
 235         DELAY(50000);
 236         if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
 237                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 238                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 239                 }
 240                 return 0;
 241         }
 242
 243         outsw(sc->nic_addr + TX_FRAME_PORT, test_packet, sizeof(test_packet));
 244
 245         DELAY(30000);
 246
 247         if ((cs_readreg(sc->nic_addr,PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
 248                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 249                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 250                 }
 251                 return 1;
 252         }
 253         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 254                 sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 255         }
 256         return 0;
 257 }
 258
 259 /*
 260  * XXX This was rewritten from Linux driver without any tests.
 261  */
 262 static int
 263 enable_aui(struct cs_softc *sc)
 264 {
 265         control_dc_dc(sc, 0);
 266         cs_writereg(sc->nic_addr, PP_LineCTL,
 267                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 268
 269         if (!send_test_pkt(sc)) {
 270                 printf("%s failed to enable AUI\n",
 271                     sc->arpcom.ac_if.if_xname);
 272                 return EINVAL;
 273         }
 274         return 0;
 275 }
 276
 277 /*
 278  * XXX This was rewritten from Linux driver without any tests.
 279  */
 280 static int
 281 enable_bnc(struct cs_softc *sc)
 282 {
 283         control_dc_dc(sc, 1);
 284         cs_writereg(sc->nic_addr, PP_LineCTL,
 285                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 286
 287         if (!send_test_pkt(sc)) {
 288                 printf("%s failed to enable BNC\n", sc->arpcom.ac_if.if_xname);
 289                 return EINVAL;
 290         }
 291         return 0;
 292 }
 293
 294 int
 295 cs_cs89x0_probe(device_t dev)
 296 {
 297         int i;
 298         int iobase;
 299         int error;
 300
 301         u_long irq, junk;
 302
 303         struct cs_softc *sc = device_get_softc(dev);
 304
 305         unsigned rev_type = 0;
 306         char chip_revision;
 307         int eeprom_buff[CHKSUM_LEN];
 308         int chip_type, pp_isaint, pp_isadma;
 309
 310         error = cs_alloc_port(dev, 0, CS_89x0_IO_PORTS);
 311         if (error)
 312                 return (error);
 313
 314         iobase=rman_get_start(sc->port_res);
 315
 316         if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG) {
 317                 /* Chip not detected. Let's try to reset it */
 318                 if (bootverbose)
 319                         device_printf(dev, "trying to reset the chip.\n");
 320                 outw(iobase+ADD_PORT, PP_SelfCTL);
 321                 i = inw(iobase+DATA_PORT);
 322                 outw(iobase+ADD_PORT, PP_SelfCTL);
 323                 outw(iobase+DATA_PORT, i | POWER_ON_RESET);
 324                 if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG)
 325                         return (ENXIO);
 326         }
 327
 328         outw(iobase+ADD_PORT, PP_ChipID);
 329         if (inw(iobase+DATA_PORT) != CHIP_EISA_ID_SIG)
 330                 return (ENXIO);
 331
 332         rev_type = cs_readreg(iobase, PRODUCT_ID_ADD);
 333         chip_type = rev_type & ~REVISON_BITS;
 334         chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 335
 336         sc->nic_addr = iobase;
 337         sc->chip_type = chip_type;
 338
 339         if(chip_type==CS8900) {
 340                 pp_isaint = PP_CS8900_ISAINT;
 341                 pp_isadma = PP_CS8900_ISADMA;
 342                 sc->send_cmd = TX_CS8900_AFTER_ALL;
 343         } else {
 344                 pp_isaint = PP_CS8920_ISAINT;
 345                 pp_isadma = PP_CS8920_ISADMA;
 346                 sc->send_cmd = TX_CS8920_AFTER_ALL;
 347         }
 348
 349         /*
 350          * Clear some fields so that fail of EEPROM will left them clean
 351          */
 352         sc->auto_neg_cnf = 0;
 353         sc->adapter_cnf  = 0;
 354         sc->isa_config   = 0;
 355
 356         /*
 357          * If no interrupt specified (or "?"), use what the board tells us.
 358          */
 359         error = bus_get_resource(dev, SYS_RES_IRQ, 0, &irq, &junk);
 360
 361         /*
 362          * Get data from EEPROM
 363          */
 364         if((cs_readreg(iobase, PP_SelfST) & EEPROM_PRESENT) == 0) {
 365                 device_printf(dev, "No EEPROM, assuming defaults.\n");
 366         } else {
 367                 if (get_eeprom_data(sc,START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
 368                         device_printf(dev, "EEPROM read failed, "
 369                                 "assuming defaults.\n");
 370                 } else {
 371                         if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
 372                                 device_printf(dev, "EEPROM cheksum bad, "
 373                                         "assuming defaults.\n");
 374                         } else {
 375                                 sc->auto_neg_cnf =
 376                                         eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
 377                                 sc->adapter_cnf =
 378                                         eeprom_buff[ADAPTER_CNF_OFFSET/2];
 379                                 sc->isa_config =
 380                                         eeprom_buff[ISA_CNF_OFFSET/2];
 381
 382                                 for (i=0; i<ETHER_ADDR_LEN/2; i++) {
 383                                         sc->arpcom.ac_enaddr[i*2]=
 384                                                 eeprom_buff[i];
 385                                         sc->arpcom.ac_enaddr[i*2+1]=
 386                                                 eeprom_buff[i] >> 8;
 387                                 }
 388
 389                                 /*
 390                                  * If no interrupt specified (or "?"),
 391                                  * use what the board tells us.
 392                                  */
 393                                 if (error) {
 394                                         irq = sc->isa_config & INT_NO_MASK;
 395                                         if (chip_type==CS8900) {
 396                                                 switch(irq) {
 397                                                  case 0:
 398                                                         irq=10;
 399                                                         error=0;
 400                                                         break;
 401                                                  case 1:
 402                                                         irq=11;
 403                                                         error=0;
 404                                                         break;
 405                                                  case 2:
 406                                                         irq=12;
 407                                                         error=0;
 408                                                         break;
 409                                                  case 3:
 410                                                         irq=5;
 411                                                         error=0;
 412                                                         break;
 413                                                  default:
 414                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 415                                                         error=EINVAL;
 416                                                 }
 417                                         } else {
 418                                                 if (irq>CS8920_NO_INTS) {
 419                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 420                                                         error=EINVAL;
 421                                                 } else {
 422                                                         error=0;
 423                                                 }
 424                                         }
 425
 426                                         if (!error)
 427                                                 bus_set_resource(dev, SYS_RES_IRQ, 0,
 428                                                                 irq, 1);
 429                                 }
 430                         }
 431                 }
 432         }
 433
 434         if (!error) {
 435                 if (chip_type == CS8900) {
 436                         switch(irq) {
 437                                 case  5:
 438                                         irq = 3;
 439                                         break;
 440                                 case 10:
 441                                         irq = 0;
 442                                         break;
 443                                 case 11:
 444                                         irq = 1;
 445                                         break;
 446                                 case 12:
 447                                         irq = 2;
 448                                         break;
 449                                 default:
 450                                         error=EINVAL;
 451                         }
 452                 } else {
 453                         if (irq > CS8920_NO_INTS) {
 454                                 error = EINVAL;
 455                         }
 456                 }
 457         }
 458
 459         if (!error) {
 460                 cs_writereg(iobase, pp_isaint, irq);
 461         } else {
 462                 device_printf(dev, "Unknown or invalid irq\n");
 463                 return (ENXIO);
 464         }
 465
 466         /*
 467          * Temporary disabled
 468          *
 469         if (drq>0)
 470                 cs_writereg(iobase, pp_isadma, drq);
 471         else {
 472                 printf("%s: incorrect drq\n", sc->arpcom.ac_if.if_xname);
 473                 return 0;
 474         }
 475         */
 476
 477         if (bootverbose)
 478                  device_printf(dev, "CS89%c0%s rev %c media%s%s%s\n",
 479                         chip_type==CS8900 ? '0' : '2',
 480                         chip_type==CS8920M ? "M" : "",
 481                         chip_revision,
 482                         (sc->adapter_cnf & A_CNF_10B_T) ? " TP"  : "",
 483                         (sc->adapter_cnf & A_CNF_AUI)   ? " AUI" : "",
 484                         (sc->adapter_cnf & A_CNF_10B_2) ? " BNC" : "");
 485
 486         if ((sc->adapter_cnf & A_CNF_EXTND_10B_2) &&
 487             (sc->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
 488                 sc->line_ctl = LOW_RX_SQUELCH;
 489         else
 490                 sc->line_ctl = 0;
 491
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Allocate a port resource with the given resource id.
 498  */
 499 int cs_alloc_port(device_t dev, int rid, int size)
 500 {
 501         struct cs_softc *sc = device_get_softc(dev);
 502         struct resource *res;
 503
 504         res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 505                                  0ul, ~0ul, size, RF_ACTIVE);
 506         if (res) {
 507                 sc->port_rid = rid;
 508                 sc->port_res = res;
 509                 sc->port_used = size;
 510                 return (0);
 511         } else {
 512                 return (ENOENT);
 513         }
 514 }
 515
 516 /*
 517  * Allocate a memory resource with the given resource id.
 518  */
 519 int cs_alloc_memory(device_t dev, int rid, int size)
 520 {
 521         struct cs_softc *sc = device_get_softc(dev);
 522         struct resource *res;
 523
 524         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
 525                                  0ul, ~0ul, size, RF_ACTIVE);
 526         if (res) {
 527                 sc->mem_rid = rid;
 528                 sc->mem_res = res;
 529                 sc->mem_used = size;
 530                 return (0);
 531         } else {
 532                 return (ENOENT);
 533         }
 534 }
 535
 536 /*
 537  * Allocate an irq resource with the given resource id.
 538  */
 539 int cs_alloc_irq(device_t dev, int rid, int flags)
 540 {
 541         struct cs_softc *sc = device_get_softc(dev);
 542         struct resource *res;
 543
 544         res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
 545                                  0ul, ~0ul, 1, (RF_ACTIVE | flags));
 546         if (res) {
 547                 sc->irq_rid = rid;
 548                 sc->irq_res = res;
 549                 return (0);
 550         } else {
 551                 return (ENOENT);
 552         }
 553 }
 554
 555 /*
 556  * Release all resources
 557  */
 558 void cs_release_resources(device_t dev)
 559 {
 560         struct cs_softc *sc = device_get_softc(dev);
 561
 562         if (sc->port_res) {
 563                 bus_release_resource(dev, SYS_RES_IOPORT,
 564                                      sc->port_rid, sc->port_res);
 565                 sc->port_res = 0;
 566         }
 567         if (sc->mem_res) {
 568                 bus_release_resource(dev, SYS_RES_MEMORY,
 569                                      sc->mem_rid, sc->mem_res);
 570                 sc->mem_res = 0;
 571         }
 572         if (sc->irq_res) {
 573                 bus_release_resource(dev, SYS_RES_IRQ,
 574                                      sc->irq_rid, sc->irq_res);
 575                 sc->irq_res = 0;
 576         }
 577 }
 578
 579 /*
 580  * Install the interface into kernel networking data structures
 581  */
 582 int
 583 cs_attach(device_t dev)
 584 {
 585         struct cs_softc *sc = device_get_softc(dev);
 586         int media=0;
 587         struct ifnet *ifp = &(sc->arpcom.ac_if);
 588
 589         cs_stop( sc );
 590
 591         ifp->if_softc=sc;
 592         if_initname(ifp, "cs", device_get_unit(dev));
 593         ifp->if_output=ether_output;
 594         ifp->if_start=cs_start;
 595         ifp->if_ioctl=cs_ioctl;
 596         ifp->if_watchdog=cs_watchdog;
 597         ifp->if_init=cs_init;
 598         ifp->if_snd.ifq_maxlen= IFQ_MAXLEN;
 599         /*
 600          *  MIB DATA
 601          */
 602         /*
 603          * XXX: Ugly comments here
 604          *
 605
 606         ifp->if_linkmib=&sc->mibdata;
 607         ifp->if_linkmiblen=sizeof sc->mibdata;
 608          */
 609
 610         ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST );
 611
 612         /*
 613          * this code still in progress (DMA support)
 614          *
 615
 616         sc->recv_ring=malloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_NOWAIT);
 617         if (sc->recv_ring == NULL) {
 618                 log(LOG_ERR,
 619                     "%s: Couldn't allocate memory for NIC\n", ifp->if_xname);
 620                 return(0);
 621         }
 622         if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
 623             < (128*1024-CS_DMA_BUFFER_SIZE))
 624             sc->recv_ring+=16*1024;
 625          */
 626
 627         sc->buffer=malloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_NOWAIT);
 628         if (sc->buffer == NULL) {
 629                 printf("%s: Couldn't allocate memory for NIC\n",
 630                     ifp->if_xname);
 631                 return(0);
 632         }
 633
 634         /*
 635          * Initialize the media structures.
 636          */
 637         ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
 638
 639         if (sc->adapter_cnf & A_CNF_10B_T) {
 640                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
 641                 if (sc->chip_type != CS8900) {
 642                         ifmedia_add(&sc->media,
 643                                 IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
 644                         ifmedia_add(&sc->media,
 645                                 IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
 646                 }
 647         }
 648
 649         if (sc->adapter_cnf & A_CNF_10B_2)
 650                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
 651
 652         if (sc->adapter_cnf & A_CNF_AUI)
 653                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
 654
 655         if (sc->adapter_cnf & A_CNF_MEDIA)
 656                 ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
 657
 658         /* Set default media from EEPROM */
 659         switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
 660         case A_CNF_MEDIA_AUTO:  media = IFM_ETHER|IFM_AUTO; break;
 661         case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
 662         case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
 663         case A_CNF_MEDIA_AUI:   media = IFM_ETHER|IFM_10_5; break;
 664         default: printf("%s: adapter has no media\n", ifp->if_xname);
 665         }
 666         ifmedia_set(&sc->media, media);
 667         cs_mediaset(sc, media);
 668
 669         ether_ifattach(ifp, sc->arpcom.ac_enaddr);
 670
 671
 672         if (bootverbose)
 673                 printf("%s: ethernet address %6D\n",
 674                        ifp->if_xname, sc->arpcom.ac_enaddr, ":");
 675
 676         return (0);
 677 }
 678
 679 /*
 680  * Initialize the board
 681  */
 682 static void
 683 cs_init(void *xsc)
 684 {
 685         struct cs_softc *sc=(struct cs_softc *)xsc;
 686         struct ifnet *ifp = &sc->arpcom.ac_if;
 687         int i, s, rx_cfg;
 688
 689         /* address not known */
 690         if (TAILQ_EMPTY(&ifp->if_addrhead)) /* unlikely? XXX */
 691                 return;
 692
 693         /*
 694          * reset whatchdog timer
 695          */
 696         ifp->if_timer=0;
 697         sc->buf_len = 0;
 698
 699         s=splimp();
 700
 701         /*
 702          * Hardware initialization of cs
 703          */
 704
 705         /* Enable receiver and transmitter */
 706         cs_writereg(sc->nic_addr, PP_LineCTL,
 707                 cs_readreg( sc->nic_addr, PP_LineCTL ) |
 708                 SERIAL_RX_ON | SERIAL_TX_ON);
 709
 710         /* Configure the receiver mode */
 711         cs_setmode(sc);
 712
 713         /*
 714          * This defines what type of frames will cause interrupts
 715          * Bad frames should generate interrupts so that the driver
 716          * could track statistics of discarded packets
 717          */
 718         rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
 719                  RX_EXTRA_DATA_ENBL;
 720         if (sc->isa_config & STREAM_TRANSFER)
 721                 rx_cfg |= RX_STREAM_ENBL;
 722         cs_writereg(sc->nic_addr, PP_RxCFG, rx_cfg);
 723
 724         cs_writereg(sc->nic_addr, PP_TxCFG, TX_LOST_CRS_ENBL |
 725                     TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
 726                     TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 727
 728         cs_writereg(sc->nic_addr, PP_BufCFG, READY_FOR_TX_ENBL |
 729                     RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
 730                     TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
 731
 732         /* Write MAC address into IA filter */
 733         for (i=0; i<ETHER_ADDR_LEN/2; i++)
 734                 cs_writereg(sc->nic_addr, PP_IA+i*2,
 735                             sc->arpcom.ac_enaddr[i*2] |
 736                             (sc->arpcom.ac_enaddr[i*2+1] << 8) );
 737
 738         /*
 739          * Now enable everything
 740          */
 741 /*
 742 #ifdef  CS_USE_64K_DMA
 743         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
 744         #else
 745
 746         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 747 #endif
 748 */
 749         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 750
 751         /*
 752          * Set running and clear output active flags
 753          */
 754         sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
 755         sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
 756
 757         /*
 758          * Start sending process
 759          */
 760         cs_start(ifp);
 761
 762         (void) splx(s);
 763 }
 764
 765 /*
 766  * Get the packet from the board and send it to the upper layer
 767  * via ether_input().
 768  */
 769 static int
 770 cs_get_packet(struct cs_softc *sc)
 771 {
 772         struct ifnet *ifp = &(sc->arpcom.ac_if);
 773         int iobase = sc->nic_addr, status, length;
 774         struct ether_header *eh;
 775         struct mbuf *m;
 776
 777 #ifdef CS_DEBUG
 778         int i;
 779 #endif
 780
 781         status = inw(iobase + RX_FRAME_PORT);
 782         length = inw(iobase + RX_FRAME_PORT);
 783
 784 #ifdef CS_DEBUG
 785         printf("%s: rcvd: stat %x, len %d\n",
 786                 ifp->if_xname, status, length);
 787 #endif
 788
 789         if (!(status & RX_OK)) {
 790 #ifdef CS_DEBUG
 791                 printf"%s: bad pkt stat %x\n", ifp->if_xname, status);
 792 #endif
 793                 ifp->if_ierrors++;
 794                 return -1;
 795         }
 796
 797         MGETHDR(m, M_DONTWAIT, MT_DATA);
 798         if (m==NULL)
 799                 return -1;
 800
 801         if (length > MHLEN) {
 802                 MCLGET(m, M_DONTWAIT);
 803                 if (!(m->m_flags & M_EXT)) {
 804                         m_freem(m);
 805                         return -1;
 806                 }
 807         }
 808
 809         /* Initialize packet's header info */
 810         m->m_pkthdr.rcvif = ifp;
 811         m->m_pkthdr.len = length;
 812         m->m_len = length;
 813
 814         /* Get the data */
 815         insw(iobase + RX_FRAME_PORT, m->m_data, (length+1)>>1);
 816
 817         eh = mtod(m, struct ether_header *);
 818
 819 #ifdef CS_DEBUG
 820         for (i=0;i<length;i++)
 821              printf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
 822         printf( "\n" );
 823 #endif
 824
 825         if (status & (RX_IA | RX_BROADCAST) ||
 826             (ifp->if_flags & IFF_MULTICAST && status & RX_HASHED)) {
 827                 m->m_pkthdr.len -= sizeof(struct ether_header);
 828                 m->m_len -= sizeof(struct ether_header);
 829                 m->m_data += sizeof(struct ether_header);
 830
 831                 /* Feed the packet to the upper layer */
 832                 ether_input(ifp, eh, m);
 833
 834                 ifp->if_ipackets++;
 835
 836                 if (length==ETHER_MAX_LEN-ETHER_CRC_LEN)
 837                         DELAY( cs_recv_delay );
 838         } else {
 839                 m_freem(m);
 840         }
 841
 842         return 0;
 843 }
 844
 845 /*
 846  * Handle interrupts
 847  */
 848 void
 849 csintr(void *arg)
 850 {
 851         struct cs_softc *sc = (struct cs_softc*) arg;
 852         struct ifnet *ifp = &(sc->arpcom.ac_if);
 853         int status;
 854
 855 #ifdef CS_DEBUG
 856         printf("%s: Interrupt.\n", ifp->xname);
 857 #endif
 858
 859         while ((status=cs_readword(sc->nic_addr, ISQ_PORT))) {
 860
 861 #ifdef CS_DEBUG
 862                 printf("%s:from ISQ: %04x\n", ifp->if_xname, status );
 863 #endif
 864
 865                 switch (status & ISQ_EVENT_MASK) {
 866                 case ISQ_RECEIVER_EVENT:
 867                         cs_get_packet(sc);
 868                         break;
 869
 870                 case ISQ_TRANSMITTER_EVENT:
 871                         if (status & TX_OK)
 872                                 ifp->if_opackets++;
 873                         else
 874                                 ifp->if_oerrors++;
 875                         ifp->if_flags &= ~IFF_OACTIVE;
 876                         ifp->if_timer = 0;
 877                         break;
 878
 879                 case ISQ_BUFFER_EVENT:
 880                         if (status & READY_FOR_TX) {
 881                                 ifp->if_flags &= ~IFF_OACTIVE;
 882                                 ifp->if_timer = 0;
 883                         }
 884
 885                         if (status & TX_UNDERRUN) {
 886                                 ifp->if_flags &= ~IFF_OACTIVE;
 887                                 ifp->if_timer = 0;
 888                                 ifp->if_oerrors++;
 889                         }
 890                         break;
 891
 892                 case ISQ_RX_MISS_EVENT:
 893                         ifp->if_ierrors+=(status>>6);
 894                         break;
 895
 896                 case ISQ_TX_COL_EVENT:
 897                         ifp->if_collisions+=(status>>6);
 898                         break;
 899                 }
 900         }
 901
 902         if (!(ifp->if_flags & IFF_OACTIVE)) {
 903                 cs_start(ifp);
 904         }
 905 }
 906
 907 /*
 908  * Save the data in buffer
 909  */
 910
 911 static void
 912 cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
 913 {
 914         int len;
 915         struct mbuf *mp;
 916         unsigned char *data, *buf;
 917
 918         for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
 919                 len = mp->m_len;
 920
 921                 /*
 922                  * Ignore empty parts
 923                  */
 924                 if (!len)
 925                 continue;
 926
 927                 /*
 928                  * Find actual data address
 929                  */
 930                 data = mtod(mp, caddr_t);
 931
 932                 bcopy((caddr_t) data, (caddr_t) buf, len);
 933                 buf += len;
 934                 sc->buf_len += len;
 935         }
 936 }
 937
 938
 939 static void
 940 cs_xmit_buf( struct cs_softc *sc )
 941 {
 942         outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
 943         sc->buf_len = 0;
 944 }
 945
 946 static void
 947 cs_start(struct ifnet *ifp)
 948 {
 949         int s, length;
 950         struct mbuf *m, *mp;
 951         struct cs_softc *sc = ifp->if_softc;
 952
 953         s = splimp();
 954
 955         for (;;) {
 956                 if (sc->buf_len)
 957                         length = sc->buf_len;
 958                 else {
 959                         IF_DEQUEUE( &ifp->if_snd, m );
 960
 961                         if (m==NULL) {
 962                                 (void) splx(s);
 963                                 return;
 964                         }
 965
 966                         for (length=0, mp=m; mp != NULL; mp=mp->m_next)
 967                                 length += mp->m_len;
 968
 969                         /* Skip zero-length packets */
 970                         if (length == 0) {
 971                                 m_freem(m);
 972                                 continue;
 973                         }
 974
 975                         cs_write_mbufs(sc, m);
 976
 977                         if (ifp->if_bpf) {
 978                                 bpf_mtap(ifp, m);
 979                         }
 980
 981                         m_freem(m);
 982                 }
 983
 984                 /*
 985                  * Issue a SEND command
 986                  */
 987                 outw(sc->nic_addr+TX_CMD_PORT, sc->send_cmd);
 988                 outw(sc->nic_addr+TX_LEN_PORT, length );
 989
 990                 /*
 991                  * If there's no free space in the buffer then leave
 992                  * this packet for the next time: indicate output active
 993                  * and return.
 994                  */
 995                 if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
 996                         ifp->if_timer = sc->buf_len;
 997                         (void) splx(s);
 998                         ifp->if_flags |= IFF_OACTIVE;
 999                         return;
1000                 }
1001
1002                 cs_xmit_buf(sc);
1003
1004                 /*
1005                  * Set the watchdog timer in case we never hear
1006                  * from board again. (I don't know about correct
1007                  * value for this timeout)
1008                  */
1009                 ifp->if_timer = length;
1010
1011                 (void) splx(s);
1012                 ifp->if_flags |= IFF_OACTIVE;
1013                 return;
1014         }
1015 }
1016
1017 /*
1018  * Stop everything on the interface
1019  */
1020 static void
1021 cs_stop(struct cs_softc *sc)
1022 {
1023         int s = splimp();
1024
1025         cs_writereg(sc->nic_addr, PP_RxCFG, 0);
1026         cs_writereg(sc->nic_addr, PP_TxCFG, 0);
1027         cs_writereg(sc->nic_addr, PP_BufCFG, 0);
1028         cs_writereg(sc->nic_addr, PP_BusCTL, 0);
1029
1030         sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1031         sc->arpcom.ac_if.if_timer = 0;
1032
1033         (void) splx(s);
1034 }
1035
1036 /*
1037  * Reset the interface
1038  */
1039 static void
1040 cs_reset(struct cs_softc *sc)
1041 {
1042         cs_stop(sc);
1043         cs_init(sc);
1044 }
1045
1046 static void
1047 cs_setmode(struct cs_softc *sc)
1048 {
1049         struct ifnet *ifp = &(sc->arpcom.ac_if);
1050         int rx_ctl;
1051
1052         /* Stop the receiver while changing filters */
1053         cs_writereg(sc->nic_addr, PP_LineCTL,
1054                         cs_readreg(sc->nic_addr, PP_LineCTL) & ~SERIAL_RX_ON);
1055
1056         if (ifp->if_flags & IFF_PROMISC) {
1057                 /* Turn on promiscuous mode. */
1058                 rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
1059         } else {
1060                 if (ifp->if_flags & IFF_MULTICAST) {
1061                         /* Allow receiving frames with multicast addresses */
1062                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1063                                  RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
1064                         /*
1065                          * Here the reconfiguration of chip's multicast
1066                          * filters should be done but I've no idea about
1067                          * hash transformation in this chip. If you can
1068                          * add this code or describe me the transformation
1069                          * I'd be very glad.
1070                          */
1071                 } else {
1072                         /*
1073                          * Receive only good frames addressed for us and
1074                          * good broadcasts.
1075                          */
1076                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1077                                  RX_OK_ACCEPT;
1078                 }
1079         }
1080
1081         /* Set up the filter */
1082         cs_writereg(sc->nic_addr, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
1083
1084         /* Turn on receiver */
1085         cs_writereg(sc->nic_addr, PP_LineCTL,
1086                         cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_RX_ON);
1087 }
1088
1089 static int
1090 cs_ioctl(register struct ifnet *ifp, u_long command, caddr_t data,
1091     struct ucred *cr)
1092 {
1093         struct cs_softc *sc=ifp->if_softc;
1094         struct ifreq *ifr = (struct ifreq *)data;
1095         int s,error=0;
1096
1097 #ifdef CS_DEBUG
1098         printf("%s: ioctl(%lx)\n",sc->arpcom.ac_if.if_xname, command);
1099 #endif
1100
1101         s=splimp();
1102
1103         switch (command) {
1104         case SIOCSIFADDR:
1105         case SIOCGIFADDR:
1106         case SIOCSIFMTU:
1107                 ether_ioctl(ifp, command, data);
1108                 break;
1109
1110         case SIOCSIFFLAGS:
1111                 /*
1112                  * Switch interface state between "running" and
1113                  * "stopped", reflecting the UP flag.
1114                  */
1115                 if (sc->arpcom.ac_if.if_flags & IFF_UP) {
1116                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
1117                                 cs_init(sc);
1118                         }
1119                 } else {
1120                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
1121                                 cs_stop(sc);
1122                         }
1123                 }
1124                 /*
1125                  * Promiscuous and/or multicast flags may have changed,
1126                  * so reprogram the multicast filter and/or receive mode.
1127                  *
1128                  * See note about multicasts in cs_setmode
1129                  */
1130                 cs_setmode(sc);
1131                 break;
1132
1133         case SIOCADDMULTI:
1134         case SIOCDELMULTI:
1135             /*
1136              * Multicast list has changed; set the hardware filter
1137              * accordingly.
1138              *
1139              * See note about multicasts in cs_setmode
1140              */
1141             cs_setmode(sc);
1142             error = 0;
1143             break;
1144
1145         case SIOCSIFMEDIA:
1146         case SIOCGIFMEDIA:
1147                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1148                 break;
1149
1150         default:
1151                 error = EINVAL;
1152         }
1153
1154         (void) splx(s);
1155         return error;
1156 }
1157
1158 /*
1159  * Device timeout/watchdog routine. Entered if the device neglects to
1160  * generate an interrupt after a transmit has been started on it.
1161  */
1162 static void
1163 cs_watchdog(struct ifnet *ifp)
1164 {
1165         struct cs_softc *sc = ifp->if_softc;
1166
1167         ifp->if_oerrors++;
1168         log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
1169
1170         /* Reset the interface */
1171         if (ifp->if_flags & IFF_UP)
1172                 cs_reset(sc);
1173         else
1174                 cs_stop(sc);
1175 }
1176
1177 static int
1178 cs_mediachange(struct ifnet *ifp)
1179 {
1180         struct cs_softc *sc = ifp->if_softc;
1181         struct ifmedia *ifm = &sc->media;
1182
1183         if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1184                 return EINVAL;
1185
1186         return cs_mediaset(sc, ifm->ifm_media);
1187 }
1188
1189 static void
1190 cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
1191 {
1192         int line_status;
1193         struct cs_softc *sc = ifp->if_softc;
1194
1195         ifmr->ifm_active = IFM_ETHER;
1196         line_status = cs_readreg(sc->nic_addr, PP_LineST);
1197         if (line_status & TENBASET_ON) {
1198                 ifmr->ifm_active |= IFM_10_T;
1199                 if (sc->chip_type != CS8900) {
1200                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & FDX_ACTIVE)
1201                                 ifmr->ifm_active |= IFM_FDX;
1202                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & HDX_ACTIVE)
1203                                 ifmr->ifm_active |= IFM_HDX;
1204                 }
1205                 ifmr->ifm_status = IFM_AVALID;
1206                 if (line_status & LINK_OK)
1207                         ifmr->ifm_status |= IFM_ACTIVE;
1208         } else {
1209                 if (line_status & AUI_ON) {
1210                         cs_writereg(sc->nic_addr, PP_SelfCTL,
1211                                     cs_readreg(sc->nic_addr, PP_SelfCTL) |
1212                                     HCB1_ENBL);
1213                         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
1214                             (cs_readreg(sc->nic_addr, PP_SelfCTL)&HCB1))
1215                                 ifmr->ifm_active |= IFM_10_2;
1216                         else
1217                                 ifmr->ifm_active |= IFM_10_5;
1218                 }
1219         }
1220 }
1221
1222 static int
1223 cs_mediaset(struct cs_softc *sc, int media)
1224 {
1225         int error;
1226
1227         /* Stop the receiver & transmitter */
1228         cs_writereg(sc->nic_addr, PP_LineCTL,
1229                     cs_readreg(sc->nic_addr, PP_LineCTL) &
1230                     ~(SERIAL_RX_ON | SERIAL_TX_ON));
1231
1232 #ifdef CS_DEBUG
1233         printf("%s: cs_setmedia(%x)\n",sc->arpcom.ac_if.if_xname, media);
1234 #endif
1235
1236         switch (IFM_SUBTYPE(media)) {
1237         default:
1238         case IFM_AUTO:
1239                 if ((error=enable_tp(sc))==0)
1240                         error = cs_duplex_auto(sc);
1241                 else if ((error=enable_bnc(sc)) != 0)
1242                         error = enable_aui(sc);
1243                 break;
1244         case IFM_10_T:
1245                 if ((error=enable_tp(sc)) != 0)
1246                         break;
1247                 if (media & IFM_FDX)
1248                         cs_duplex_full(sc);
1249                 else if (media & IFM_HDX)
1250                         cs_duplex_half(sc);
1251                 else
1252                         error = cs_duplex_auto(sc);
1253                 break;
1254         case IFM_10_2:
1255                 error = enable_bnc(sc);
1256                 break;
1257         case IFM_10_5:
1258                 error = enable_aui(sc);
1259                 break;
1260         }
1261
1262         /*
1263          * Turn the transmitter & receiver back on
1264          */
1265         cs_writereg(sc->nic_addr, PP_LineCTL,
1266                     cs_readreg( sc->nic_addr, PP_LineCTL ) |
1267                     SERIAL_RX_ON | SERIAL_TX_ON);
1268
1269         return error;
1270 }