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  * $DragonFly: src/sys/dev/netif/cs/if_cs.c,v 1.20 2005/09/02 12:51:00 sephe Exp $
  29  */
  30
  31 /*
  32  * Device driver for Crystal Semiconductor CS8920 based ethernet
  33  *   adapters. By Maxim Bolotin and Oleg Sharoiko, 27-April-1997
  34  */
  35
  36 /*
  37 #define  CS_DEBUG
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.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/thread2.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/ifq_var.h>
  60 #include <net/if_arp.h>
  61 #include <net/if_media.h>
  62 #include <net/ethernet.h>
  63 #include <net/bpf.h>
  64
  65 #include "if_csreg.h"
  66 #include "if_csvar.h"
  67
  68 #ifdef  CS_USE_64K_DMA
  69 #define CS_DMA_BUFFER_SIZE 65536
  70 #else
  71 #define CS_DMA_BUFFER_SIZE 16384
  72 #endif
  73
  74 static int      cs_recv_delay = 570;
  75 SYSCTL_INT(_machdep, OID_AUTO, cs_recv_delay, CTLFLAG_RW, &cs_recv_delay, 0, "");
  76
  77 static void     cs_init(void *);
  78 static int      cs_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
  79 static void     cs_start(struct ifnet *);
  80 static void     cs_stop(struct cs_softc *);
  81 static void     cs_reset(struct cs_softc *);
  82 static void     cs_watchdog(struct ifnet *);
  83 static void     csintr(void *);
  84
  85 static int      cs_mediachange(struct ifnet *);
  86 static void     cs_mediastatus(struct ifnet *, struct ifmediareq *);
  87 static int      cs_mediaset(struct cs_softc *, int);
  88
  89 static void     cs_write_mbufs(struct cs_softc*, struct mbuf*);
  90 static void     cs_xmit_buf(struct cs_softc*);
  91 static int      cs_get_packet(struct cs_softc*);
  92 static void     cs_setmode(struct cs_softc*);
  93
  94 static int      get_eeprom_data(device_t, int, int, int *);
  95 static int      get_eeprom_cksum(int, int, int *);
  96 static int      wait_eeprom_ready( struct cs_softc *);
  97 static void     control_dc_dc(struct cs_softc *, int );
  98 static int      send_test_pkt(struct cs_softc * );
  99 static int      enable_tp(struct cs_softc *);
 100 static int      enable_aui(struct cs_softc *);
 101 static int      enable_bnc(struct cs_softc *);
 102 static int      cs_duplex_auto(struct cs_softc *);
 103
 104 devclass_t cs_devclass;
 105
 106 DECLARE_DUMMY_MODULE(if_cs);
 107
 108 static int
 109 get_eeprom_data(device_t dev, int off, int len, int *buffer)
 110 {
 111         struct cs_softc *sc;
 112         int i;
 113
 114         sc = device_get_softc(dev);
 115
 116 #ifdef CS_DEBUG
 117         device_printf(dev, "EEPROM data from %x for %x:\n", off, len);
 118 #endif
 119
 120         for (i=0;i<len;i++) {
 121                 if (wait_eeprom_ready(sc) < 0) return -1;
 122                 /* Send command to EEPROM to read */
 123                 cs_writereg(sc->nic_addr, PP_EECMD, (off+i)|EEPROM_READ_CMD );
 124                 if (wait_eeprom_ready(sc)<0)
 125                         return -1;
 126                 buffer[i] = cs_readreg (sc->nic_addr, PP_EEData);
 127
 128 #ifdef CS_DEBUG
 129                 printf("%02x %02x ",(unsigned char)buffer[i],
 130                                         (unsigned char)buffer[i+1]);
 131 #endif
 132         }
 133
 134 #ifdef CS_DEBUG
 135         printf("\n");
 136 #endif
 137
 138         return 0;
 139 }
 140
 141 static int
 142 get_eeprom_cksum(int off, int len, int *buffer)
 143 {
 144         int i,cksum=0;
 145
 146         for (i=0;i<len;i++)
 147                 cksum+=buffer[i];
 148         cksum &= 0xffff;
 149         if (cksum==0)
 150                 return 0;
 151         return -1;
 152 }
 153
 154 static int
 155 wait_eeprom_ready(struct cs_softc *sc)
 156 {
 157         DELAY ( 30000 );        /* XXX should we do some checks here ? */
 158         return 0;
 159 }
 160
 161 static void
 162 control_dc_dc(struct cs_softc *sc, int on_not_off)
 163 {
 164         unsigned int self_control = HCB1_ENBL;
 165
 166         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0) ^ on_not_off)
 167                 self_control |= HCB1;
 168         else
 169                 self_control &= ~HCB1;
 170         cs_writereg( sc->nic_addr, PP_SelfCTL, self_control );
 171
 172         DELAY( 500000 );
 173 }
 174
 175
 176 static int
 177 cs_duplex_auto(struct cs_softc *sc)
 178 {
 179         int i, error=0;
 180
 181         cs_writereg(sc->nic_addr, PP_AutoNegCTL,
 182                     RE_NEG_NOW | ALLOW_FDX | AUTO_NEG_ENABLE );
 183         for (i=0; cs_readreg(sc->nic_addr,PP_AutoNegST)&AUTO_NEG_BUSY; i++) {
 184                 if (i > 40000) {
 185                         if_printf(&sc->arpcom.ac_if, "full/half duplex "
 186                                   "auto negotiation timeout\n");
 187                         error = ETIMEDOUT;
 188                         break;
 189                 }
 190                 DELAY(1000);
 191         }
 192         DELAY( 1000000 );
 193         return error;
 194 }
 195
 196 static int
 197 enable_tp(struct cs_softc *sc)
 198 {
 199         cs_writereg(sc->nic_addr, PP_LineCTL, sc->line_ctl & ~AUI_ONLY);
 200         control_dc_dc(sc, 0);
 201         DELAY( 150000 );
 202
 203         if ((cs_readreg(sc->nic_addr, PP_LineST) & LINK_OK)==0) {
 204                 if_printf(&sc->arpcom.ac_if, "failed to enable TP\n");
 205                 return EINVAL;
 206         }
 207
 208         return 0;
 209 }
 210
 211 /*
 212  * XXX This was rewritten from Linux driver without any tests.
 213  */
 214 static int
 215 send_test_pkt(struct cs_softc *sc)
 216 {
 217         char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
 218                                 0, 46,  /* A 46 in network order */
 219                                 0, 0,   /* DSAP=0 & SSAP=0 fields */
 220                                 0xf3, 0 /* Control (Test Req + P bit set) */ };
 221         int i;
 222         u_char ether_address_backup[ETHER_ADDR_LEN];
 223
 224         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 225                 ether_address_backup[i] = sc->arpcom.ac_enaddr[i];
 226         }
 227
 228         cs_writereg(sc->nic_addr, PP_LineCTL,
 229                 cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_TX_ON );
 230         bcopy(test_packet,
 231                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 232         bcopy(test_packet+ETHER_ADDR_LEN,
 233                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 234         outw(sc->nic_addr + TX_CMD_PORT, sc->send_cmd);
 235         outw(sc->nic_addr + TX_LEN_PORT, sizeof(test_packet));
 236
 237         /* Wait for chip to allocate memory */
 238         DELAY(50000);
 239         if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
 240                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 241                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 242                 }
 243                 return 0;
 244         }
 245
 246         outsw(sc->nic_addr + TX_FRAME_PORT, test_packet, sizeof(test_packet));
 247
 248         DELAY(30000);
 249
 250         if ((cs_readreg(sc->nic_addr,PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
 251                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 252                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 253                 }
 254                 return 1;
 255         }
 256         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 257                 sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 258         }
 259         return 0;
 260 }
 261
 262 /*
 263  * XXX This was rewritten from Linux driver without any tests.
 264  */
 265 static int
 266 enable_aui(struct cs_softc *sc)
 267 {
 268         control_dc_dc(sc, 0);
 269         cs_writereg(sc->nic_addr, PP_LineCTL,
 270                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 271
 272         if (!send_test_pkt(sc)) {
 273                 if_printf(&sc->arpcom.ac_if, "failed to enable AUI\n");
 274                 return EINVAL;
 275         }
 276         return 0;
 277 }
 278
 279 /*
 280  * XXX This was rewritten from Linux driver without any tests.
 281  */
 282 static int
 283 enable_bnc(struct cs_softc *sc)
 284 {
 285         control_dc_dc(sc, 1);
 286         cs_writereg(sc->nic_addr, PP_LineCTL,
 287                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 288
 289         if (!send_test_pkt(sc)) {
 290                 if_printf(&sc->arpcom.ac_if, "failed to enable BNC\n");
 291                 return EINVAL;
 292         }
 293         return 0;
 294 }
 295
 296 int
 297 cs_cs89x0_probe(device_t dev)
 298 {
 299         int i;
 300         int iobase;
 301         int error;
 302
 303         u_long irq, junk;
 304
 305         struct cs_softc *sc = device_get_softc(dev);
 306
 307         unsigned rev_type = 0;
 308         char chip_revision;
 309         int eeprom_buff[CHKSUM_LEN];
 310         int chip_type, pp_isaint, pp_isadma;
 311
 312         error = cs_alloc_port(dev, 0, CS_89x0_IO_PORTS);
 313         if (error)
 314                 return (error);
 315
 316         iobase=rman_get_start(sc->port_res);
 317
 318         if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG) {
 319                 /* Chip not detected. Let's try to reset it */
 320                 if (bootverbose)
 321                         device_printf(dev, "trying to reset the chip.\n");
 322                 outw(iobase+ADD_PORT, PP_SelfCTL);
 323                 i = inw(iobase+DATA_PORT);
 324                 outw(iobase+ADD_PORT, PP_SelfCTL);
 325                 outw(iobase+DATA_PORT, i | POWER_ON_RESET);
 326                 if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG)
 327                         return (ENXIO);
 328         }
 329
 330         outw(iobase+ADD_PORT, PP_ChipID);
 331         if (inw(iobase+DATA_PORT) != CHIP_EISA_ID_SIG)
 332                 return (ENXIO);
 333
 334         rev_type = cs_readreg(iobase, PRODUCT_ID_ADD);
 335         chip_type = rev_type & ~REVISON_BITS;
 336         chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 337
 338         sc->nic_addr = iobase;
 339         sc->chip_type = chip_type;
 340
 341         if(chip_type==CS8900) {
 342                 pp_isaint = PP_CS8900_ISAINT;
 343                 pp_isadma = PP_CS8900_ISADMA;
 344                 sc->send_cmd = TX_CS8900_AFTER_ALL;
 345         } else {
 346                 pp_isaint = PP_CS8920_ISAINT;
 347                 pp_isadma = PP_CS8920_ISADMA;
 348                 sc->send_cmd = TX_CS8920_AFTER_ALL;
 349         }
 350
 351         /*
 352          * Clear some fields so that fail of EEPROM will left them clean
 353          */
 354         sc->auto_neg_cnf = 0;
 355         sc->adapter_cnf  = 0;
 356         sc->isa_config   = 0;
 357
 358         /*
 359          * If no interrupt specified (or "?"), use what the board tells us.
 360          */
 361         error = bus_get_resource(dev, SYS_RES_IRQ, 0, &irq, &junk);
 362
 363         /*
 364          * Get data from EEPROM
 365          */
 366         if((cs_readreg(iobase, PP_SelfST) & EEPROM_PRESENT) == 0) {
 367                 device_printf(dev, "No EEPROM, assuming defaults.\n");
 368         } else {
 369                 if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN,
 370                                     eeprom_buff)<0) {
 371                         device_printf(dev, "EEPROM read failed, "
 372                                 "assuming defaults.\n");
 373                 } else {
 374                         if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
 375                                 device_printf(dev, "EEPROM cheksum bad, "
 376                                         "assuming defaults.\n");
 377                         } else {
 378                                 sc->auto_neg_cnf =
 379                                         eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
 380                                 sc->adapter_cnf =
 381                                         eeprom_buff[ADAPTER_CNF_OFFSET/2];
 382                                 sc->isa_config =
 383                                         eeprom_buff[ISA_CNF_OFFSET/2];
 384
 385                                 for (i=0; i<ETHER_ADDR_LEN/2; i++) {
 386                                         sc->arpcom.ac_enaddr[i*2]=
 387                                                 eeprom_buff[i];
 388                                         sc->arpcom.ac_enaddr[i*2+1]=
 389                                                 eeprom_buff[i] >> 8;
 390                                 }
 391
 392                                 /*
 393                                  * If no interrupt specified (or "?"),
 394                                  * use what the board tells us.
 395                                  */
 396                                 if (error) {
 397                                         irq = sc->isa_config & INT_NO_MASK;
 398                                         if (chip_type==CS8900) {
 399                                                 switch(irq) {
 400                                                  case 0:
 401                                                         irq=10;
 402                                                         error=0;
 403                                                         break;
 404                                                  case 1:
 405                                                         irq=11;
 406                                                         error=0;
 407                                                         break;
 408                                                  case 2:
 409                                                         irq=12;
 410                                                         error=0;
 411                                                         break;
 412                                                  case 3:
 413                                                         irq=5;
 414                                                         error=0;
 415                                                         break;
 416                                                  default:
 417                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 418                                                         error=EINVAL;
 419                                                 }
 420                                         } else {
 421                                                 if (irq>CS8920_NO_INTS) {
 422                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 423                                                         error=EINVAL;
 424                                                 } else {
 425                                                         error=0;
 426                                                 }
 427                                         }
 428
 429                                         if (!error)
 430                                                 bus_set_resource(dev, SYS_RES_IRQ, 0,
 431                                                                 irq, 1);
 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 cs_alloc_port(device_t dev, int rid, int size)
 503 {
 504         struct cs_softc *sc = device_get_softc(dev);
 505         struct resource *res;
 506
 507         res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 508                                  0ul, ~0ul, size, RF_ACTIVE);
 509         if (res) {
 510                 sc->port_rid = rid;
 511                 sc->port_res = res;
 512                 sc->port_used = size;
 513                 return (0);
 514         } else {
 515                 return (ENOENT);
 516         }
 517 }
 518
 519 /*
 520  * Allocate a memory resource with the given resource id.
 521  */
 522 int cs_alloc_memory(device_t dev, int rid, int size)
 523 {
 524         struct cs_softc *sc = device_get_softc(dev);
 525         struct resource *res;
 526
 527         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
 528                                  0ul, ~0ul, size, RF_ACTIVE);
 529         if (res) {
 530                 sc->mem_rid = rid;
 531                 sc->mem_res = res;
 532                 sc->mem_used = size;
 533                 return (0);
 534         } else {
 535                 return (ENOENT);
 536         }
 537 }
 538
 539 /*
 540  * Allocate an irq resource with the given resource id.
 541  */
 542 int cs_alloc_irq(device_t dev, int rid, int flags)
 543 {
 544         struct cs_softc *sc = device_get_softc(dev);
 545         struct resource *res;
 546
 547         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
 548             (RF_ACTIVE | flags));
 549         if (res) {
 550                 sc->irq_rid = rid;
 551                 sc->irq_res = res;
 552                 return (0);
 553         } else {
 554                 return (ENOENT);
 555         }
 556 }
 557
 558 /*
 559  * Release all resources
 560  */
 561 void cs_release_resources(device_t dev)
 562 {
 563         struct cs_softc *sc = device_get_softc(dev);
 564
 565         if (sc->port_res) {
 566                 bus_release_resource(dev, SYS_RES_IOPORT,
 567                                      sc->port_rid, sc->port_res);
 568                 sc->port_res = 0;
 569         }
 570         if (sc->mem_res) {
 571                 bus_release_resource(dev, SYS_RES_MEMORY,
 572                                      sc->mem_rid, sc->mem_res);
 573                 sc->mem_res = 0;
 574         }
 575         if (sc->irq_res) {
 576                 bus_release_resource(dev, SYS_RES_IRQ,
 577                                      sc->irq_rid, sc->irq_res);
 578                 sc->irq_res = 0;
 579         }
 580 }
 581
 582 /*
 583  * Install the interface into kernel networking data structures
 584  */
 585 int
 586 cs_attach(device_t dev)
 587 {
 588         struct cs_softc *sc = device_get_softc(dev);
 589         int media = 0, error;
 590         struct ifnet *ifp = &(sc->arpcom.ac_if);
 591
 592         /*
 593          * Initialize the media structures.
 594          */
 595         ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
 596
 597         KASSERT(sc->port_used > 0 || sc->mem_used > 0,
 598                 ("%s: either I/O port or I/O memory should be used",
 599                  device_get_nameunit(dev)));
 600         if (sc->port_used > 0)
 601                 cs_alloc_port(dev, sc->port_rid, sc->port_used);
 602         if (sc->mem_used > 0)
 603                 cs_alloc_memory(dev, sc->mem_rid, sc->mem_used);
 604
 605         error = cs_alloc_irq(dev, sc->irq_rid, 0);
 606         if (error) {
 607                 device_printf(dev, "Couldn't allocate irq");
 608                 goto bad;
 609         }
 610
 611         cs_stop(sc);
 612
 613         ifp->if_softc=sc;
 614         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 615         ifp->if_start=cs_start;
 616         ifp->if_ioctl=cs_ioctl;
 617         ifp->if_watchdog=cs_watchdog;
 618         ifp->if_init=cs_init;
 619         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 620         ifq_set_ready(&ifp->if_snd);
 621
 622 #if 0
 623         /*
 624          *  MIB DATA
 625          */
 626         ifp->if_linkmib=&sc->mibdata;
 627         ifp->if_linkmiblen=sizeof sc->mibdata;
 628 #endif
 629
 630         ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST );
 631
 632 #if 0
 633         /*
 634          * this code still in progress (DMA support)
 635          */
 636         sc->recv_ring=malloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_WAITOK);
 637         if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
 638             < (128*1024-CS_DMA_BUFFER_SIZE))
 639             sc->recv_ring+=16*1024;
 640 #endif
 641
 642         sc->buffer=malloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_WAITOK);
 643
 644         if (sc->adapter_cnf & A_CNF_10B_T) {
 645                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
 646                 if (sc->chip_type != CS8900) {
 647                         ifmedia_add(&sc->media,
 648                                 IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
 649                         ifmedia_add(&sc->media,
 650                                 IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
 651                 }
 652         }
 653
 654         if (sc->adapter_cnf & A_CNF_10B_2)
 655                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
 656
 657         if (sc->adapter_cnf & A_CNF_AUI)
 658                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
 659
 660         if (sc->adapter_cnf & A_CNF_MEDIA)
 661                 ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
 662
 663         /* Set default media from EEPROM */
 664         switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
 665         case A_CNF_MEDIA_AUTO:  media = IFM_ETHER|IFM_AUTO; break;
 666         case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
 667         case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
 668         case A_CNF_MEDIA_AUI:   media = IFM_ETHER|IFM_10_5; break;
 669         default: device_printf(dev, "adapter has no media\n");
 670         }
 671         ifmedia_set(&sc->media, media);
 672         cs_mediaset(sc, media);
 673
 674         ether_ifattach(ifp, sc->arpcom.ac_enaddr);
 675
 676         error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
 677                                csintr, sc, &sc->irq_handle, NULL);
 678         if (error) {
 679                 device_printf(dev, "Couldn't set up irq");
 680                 ether_ifdetach(ifp);
 681                 goto bad;
 682         }
 683
 684         return 0;
 685
 686 bad:
 687         cs_detach(dev);
 688         return error;
 689 }
 690
 691 int
 692 cs_detach(device_t dev)
 693 {
 694         struct cs_softc *sc = device_get_softc(dev);
 695
 696         crit_enter();
 697
 698         if (device_is_attached(dev)) {
 699                 cs_stop(sc);
 700                 ether_ifdetach(&sc->arpcom.ac_if);
 701         }
 702
 703         if (sc->irq_handle != NULL)
 704                 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 705
 706         crit_exit();
 707
 708 #if 0
 709         /*
 710          * this code still in progress (DMA support)
 711          */
 712         if (sc->recv_ring != NULL)
 713                 free(sc->recv_ring, M_DEVBUF);
 714 #endif
 715
 716         if (sc->buffer != NULL)
 717                 free(sc->buffer, M_DEVBUF);
 718
 719         cs_release_resources(dev);
 720
 721         ifmedia_removeall(&sc->media);
 722
 723         return 0;
 724 }
 725
 726 /*
 727  * Initialize the board
 728  */
 729 static void
 730 cs_init(void *xsc)
 731 {
 732         struct cs_softc *sc=(struct cs_softc *)xsc;
 733         struct ifnet *ifp = &sc->arpcom.ac_if;
 734         int i, rx_cfg;
 735
 736         crit_enter();
 737
 738         /*
 739          * reset whatchdog timer
 740          */
 741         ifp->if_timer=0;
 742         sc->buf_len = 0;
 743
 744         /*
 745          * Hardware initialization of cs
 746          */
 747
 748         /* Enable receiver and transmitter */
 749         cs_writereg(sc->nic_addr, PP_LineCTL,
 750                 cs_readreg( sc->nic_addr, PP_LineCTL ) |
 751                 SERIAL_RX_ON | SERIAL_TX_ON);
 752
 753         /* Configure the receiver mode */
 754         cs_setmode(sc);
 755
 756         /*
 757          * This defines what type of frames will cause interrupts
 758          * Bad frames should generate interrupts so that the driver
 759          * could track statistics of discarded packets
 760          */
 761         rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
 762                  RX_EXTRA_DATA_ENBL;
 763         if (sc->isa_config & STREAM_TRANSFER)
 764                 rx_cfg |= RX_STREAM_ENBL;
 765         cs_writereg(sc->nic_addr, PP_RxCFG, rx_cfg);
 766
 767         cs_writereg(sc->nic_addr, PP_TxCFG, TX_LOST_CRS_ENBL |
 768                     TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
 769                     TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 770
 771         cs_writereg(sc->nic_addr, PP_BufCFG, READY_FOR_TX_ENBL |
 772                     RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
 773                     TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
 774
 775         /* Write MAC address into IA filter */
 776         for (i=0; i<ETHER_ADDR_LEN/2; i++)
 777                 cs_writereg(sc->nic_addr, PP_IA+i*2,
 778                             sc->arpcom.ac_enaddr[i*2] |
 779                             (sc->arpcom.ac_enaddr[i*2+1] << 8) );
 780
 781         /*
 782          * Now enable everything
 783          */
 784 /*
 785 #ifdef  CS_USE_64K_DMA
 786         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
 787         #else
 788
 789         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 790 #endif
 791 */
 792         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 793
 794         /*
 795          * Set running and clear output active flags
 796          */
 797         sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
 798         sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
 799
 800         /*
 801          * Start sending process
 802          */
 803         cs_start(ifp);
 804
 805         crit_exit();
 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              printf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
 861         printf( "\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                 cs_start(ifp);
 938         }
 939 }
 940
 941 /*
 942  * Save the data in buffer
 943  */
 944
 945 static void
 946 cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
 947 {
 948         int len;
 949         struct mbuf *mp;
 950         unsigned char *data, *buf;
 951
 952         for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
 953                 len = mp->m_len;
 954
 955                 /*
 956                  * Ignore empty parts
 957                  */
 958                 if (!len)
 959                 continue;
 960
 961                 /*
 962                  * Find actual data address
 963                  */
 964                 data = mtod(mp, caddr_t);
 965
 966                 bcopy((caddr_t) data, (caddr_t) buf, len);
 967                 buf += len;
 968                 sc->buf_len += len;
 969         }
 970 }
 971
 972
 973 static void
 974 cs_xmit_buf( struct cs_softc *sc )
 975 {
 976         outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
 977         sc->buf_len = 0;
 978 }
 979
 980 static void
 981 cs_start(struct ifnet *ifp)
 982 {
 983         int length;
 984         struct mbuf *m, *mp;
 985         struct cs_softc *sc = ifp->if_softc;
 986
 987         crit_enter();
 988
 989         for (;;) {
 990                 if (sc->buf_len)
 991                         length = sc->buf_len;
 992                 else {
 993                         m = ifq_dequeue(&ifp->if_snd);
 994
 995                         if (m==NULL) {
 996                                 crit_exit();
 997                                 return;
 998                         }
 999
1000                         for (length=0, mp=m; mp != NULL; mp=mp->m_next)
1001                                 length += mp->m_len;
1002
1003                         /* Skip zero-length packets */
1004                         if (length == 0) {
1005                                 m_freem(m);
1006                                 continue;
1007                         }
1008
1009                         cs_write_mbufs(sc, m);
1010
1011                         BPF_MTAP(ifp, m);
1012
1013                         m_freem(m);
1014                 }
1015
1016                 /*
1017                  * Issue a SEND command
1018                  */
1019                 outw(sc->nic_addr+TX_CMD_PORT, sc->send_cmd);
1020                 outw(sc->nic_addr+TX_LEN_PORT, length );
1021
1022                 /*
1023                  * If there's no free space in the buffer then leave
1024                  * this packet for the next time: indicate output active
1025                  * and return.
1026                  */
1027                 if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
1028                         ifp->if_timer = sc->buf_len;
1029                         ifp->if_flags |= IFF_OACTIVE;
1030                         crit_exit();
1031                         return;
1032                 }
1033
1034                 cs_xmit_buf(sc);
1035
1036                 /*
1037                  * Set the watchdog timer in case we never hear
1038                  * from board again. (I don't know about correct
1039                  * value for this timeout)
1040                  */
1041                 ifp->if_timer = length;
1042
1043                 crit_exit();
1044                 ifp->if_flags |= IFF_OACTIVE;
1045                 return;
1046         }
1047 }
1048
1049 /*
1050  * Stop everything on the interface
1051  */
1052 static void
1053 cs_stop(struct cs_softc *sc)
1054 {
1055         crit_enter();
1056
1057         cs_writereg(sc->nic_addr, PP_RxCFG, 0);
1058         cs_writereg(sc->nic_addr, PP_TxCFG, 0);
1059         cs_writereg(sc->nic_addr, PP_BufCFG, 0);
1060         cs_writereg(sc->nic_addr, PP_BusCTL, 0);
1061
1062         sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1063         sc->arpcom.ac_if.if_timer = 0;
1064
1065         crit_exit();
1066 }
1067
1068 /*
1069  * Reset the interface
1070  */
1071 static void
1072 cs_reset(struct cs_softc *sc)
1073 {
1074         cs_stop(sc);
1075         cs_init(sc);
1076 }
1077
1078 static void
1079 cs_setmode(struct cs_softc *sc)
1080 {
1081         struct ifnet *ifp = &(sc->arpcom.ac_if);
1082         int rx_ctl;
1083
1084         /* Stop the receiver while changing filters */
1085         cs_writereg(sc->nic_addr, PP_LineCTL,
1086                         cs_readreg(sc->nic_addr, PP_LineCTL) & ~SERIAL_RX_ON);
1087
1088         if (ifp->if_flags & IFF_PROMISC) {
1089                 /* Turn on promiscuous mode. */
1090                 rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
1091         } else {
1092                 if (ifp->if_flags & IFF_MULTICAST) {
1093                         /* Allow receiving frames with multicast addresses */
1094                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1095                                  RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
1096                         /*
1097                          * Here the reconfiguration of chip's multicast
1098                          * filters should be done but I've no idea about
1099                          * hash transformation in this chip. If you can
1100                          * add this code or describe me the transformation
1101                          * I'd be very glad.
1102                          */
1103                 } else {
1104                         /*
1105                          * Receive only good frames addressed for us and
1106                          * good broadcasts.
1107                          */
1108                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1109                                  RX_OK_ACCEPT;
1110                 }
1111         }
1112
1113         /* Set up the filter */
1114         cs_writereg(sc->nic_addr, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
1115
1116         /* Turn on receiver */
1117         cs_writereg(sc->nic_addr, PP_LineCTL,
1118                         cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_RX_ON);
1119 }
1120
1121 static int
1122 cs_ioctl(register struct ifnet *ifp, u_long command, caddr_t data,
1123     struct ucred *cr)
1124 {
1125         struct cs_softc *sc=ifp->if_softc;
1126         struct ifreq *ifr = (struct ifreq *)data;
1127         int error=0;
1128
1129 #ifdef CS_DEBUG
1130         if_printf(ifp, "ioctl(%lx)\n", command);
1131 #endif
1132
1133         crit_enter();
1134
1135         switch (command) {
1136         case SIOCSIFFLAGS:
1137                 /*
1138                  * Switch interface state between "running" and
1139                  * "stopped", reflecting the UP flag.
1140                  */
1141                 if (sc->arpcom.ac_if.if_flags & IFF_UP) {
1142                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
1143                                 cs_init(sc);
1144                         }
1145                 } else {
1146                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
1147                                 cs_stop(sc);
1148                         }
1149                 }
1150                 /*
1151                  * Promiscuous and/or multicast flags may have changed,
1152                  * so reprogram the multicast filter and/or receive mode.
1153                  *
1154                  * See note about multicasts in cs_setmode
1155                  */
1156                 cs_setmode(sc);
1157                 break;
1158
1159         case SIOCADDMULTI:
1160         case SIOCDELMULTI:
1161             /*
1162              * Multicast list has changed; set the hardware filter
1163              * accordingly.
1164              *
1165              * See note about multicasts in cs_setmode
1166              */
1167             cs_setmode(sc);
1168             error = 0;
1169             break;
1170
1171         case SIOCSIFMEDIA:
1172         case SIOCGIFMEDIA:
1173                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1174                 break;
1175         default:
1176                 error = ether_ioctl(ifp, command, data);
1177                 break;
1178         }
1179
1180         crit_exit();
1181
1182         return error;
1183 }
1184
1185 /*
1186  * Device timeout/watchdog routine. Entered if the device neglects to
1187  * generate an interrupt after a transmit has been started on it.
1188  */
1189 static void
1190 cs_watchdog(struct ifnet *ifp)
1191 {
1192         struct cs_softc *sc = ifp->if_softc;
1193
1194         ifp->if_oerrors++;
1195         log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
1196
1197         /* Reset the interface */
1198         if (ifp->if_flags & IFF_UP)
1199                 cs_reset(sc);
1200         else
1201                 cs_stop(sc);
1202 }
1203
1204 static int
1205 cs_mediachange(struct ifnet *ifp)
1206 {
1207         struct cs_softc *sc = ifp->if_softc;
1208         struct ifmedia *ifm = &sc->media;
1209
1210         if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1211                 return EINVAL;
1212
1213         return cs_mediaset(sc, ifm->ifm_media);
1214 }
1215
1216 static void
1217 cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
1218 {
1219         int line_status;
1220         struct cs_softc *sc = ifp->if_softc;
1221
1222         ifmr->ifm_active = IFM_ETHER;
1223         line_status = cs_readreg(sc->nic_addr, PP_LineST);
1224         if (line_status & TENBASET_ON) {
1225                 ifmr->ifm_active |= IFM_10_T;
1226                 if (sc->chip_type != CS8900) {
1227                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & FDX_ACTIVE)
1228                                 ifmr->ifm_active |= IFM_FDX;
1229                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & HDX_ACTIVE)
1230                                 ifmr->ifm_active |= IFM_HDX;
1231                 }
1232                 ifmr->ifm_status = IFM_AVALID;
1233                 if (line_status & LINK_OK)
1234                         ifmr->ifm_status |= IFM_ACTIVE;
1235         } else {
1236                 if (line_status & AUI_ON) {
1237                         cs_writereg(sc->nic_addr, PP_SelfCTL,
1238                                     cs_readreg(sc->nic_addr, PP_SelfCTL) |
1239                                     HCB1_ENBL);
1240                         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
1241                             (cs_readreg(sc->nic_addr, PP_SelfCTL)&HCB1))
1242                                 ifmr->ifm_active |= IFM_10_2;
1243                         else
1244                                 ifmr->ifm_active |= IFM_10_5;
1245                 }
1246         }
1247 }
1248
1249 static int
1250 cs_mediaset(struct cs_softc *sc, int media)
1251 {
1252         int error;
1253
1254         /* Stop the receiver & transmitter */
1255         cs_writereg(sc->nic_addr, PP_LineCTL,
1256                     cs_readreg(sc->nic_addr, PP_LineCTL) &
1257                     ~(SERIAL_RX_ON | SERIAL_TX_ON));
1258
1259 #ifdef CS_DEBUG
1260         if_printf(&sc->arpcom.ac_if, "cs_setmedia(%x)\n", media);
1261 #endif
1262
1263         switch (IFM_SUBTYPE(media)) {
1264         default:
1265         case IFM_AUTO:
1266                 if ((error=enable_tp(sc))==0)
1267                         error = cs_duplex_auto(sc);
1268                 else if ((error=enable_bnc(sc)) != 0)
1269                         error = enable_aui(sc);
1270                 break;
1271         case IFM_10_T:
1272                 if ((error=enable_tp(sc)) != 0)
1273                         break;
1274                 if (media & IFM_FDX)
1275                         cs_duplex_full(sc);
1276                 else if (media & IFM_HDX)
1277                         cs_duplex_half(sc);
1278                 else
1279                         error = cs_duplex_auto(sc);
1280                 break;
1281         case IFM_10_2:
1282                 error = enable_bnc(sc);
1283                 break;
1284         case IFM_10_5:
1285                 error = enable_aui(sc);
1286                 break;
1287         }
1288
1289         /*
1290          * Turn the transmitter & receiver back on
1291          */
1292         cs_writereg(sc->nic_addr, PP_LineCTL,
1293                     cs_readreg( sc->nic_addr, PP_LineCTL ) |
1294                     SERIAL_RX_ON | SERIAL_TX_ON);
1295
1296         return error;
1297 }