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 1.25 2006/08/06 12:49:05 swildner 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
 503 cs_alloc_port(device_t dev, int rid, int size)
 504 {
 505         struct cs_softc *sc = device_get_softc(dev);
 506         struct resource *res;
 507
 508         res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 509                                  0ul, ~0ul, size, RF_ACTIVE);
 510         if (res) {
 511                 sc->port_rid = rid;
 512                 sc->port_res = res;
 513                 sc->port_used = size;
 514                 return (0);
 515         } else {
 516                 return (ENOENT);
 517         }
 518 }
 519
 520 /*
 521  * Allocate a memory resource with the given resource id.
 522  */
 523 int
 524 cs_alloc_memory(device_t dev, int rid, int size)
 525 {
 526         struct cs_softc *sc = device_get_softc(dev);
 527         struct resource *res;
 528
 529         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
 530                                  0ul, ~0ul, size, RF_ACTIVE);
 531         if (res) {
 532                 sc->mem_rid = rid;
 533                 sc->mem_res = res;
 534                 sc->mem_used = size;
 535                 return (0);
 536         } else {
 537                 return (ENOENT);
 538         }
 539 }
 540
 541 /*
 542  * Allocate an irq resource with the given resource id.
 543  */
 544 int
 545 cs_alloc_irq(device_t dev, int rid, int flags)
 546 {
 547         struct cs_softc *sc = device_get_softc(dev);
 548         struct resource *res;
 549
 550         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
 551             (RF_ACTIVE | flags));
 552         if (res) {
 553                 sc->irq_rid = rid;
 554                 sc->irq_res = res;
 555                 return (0);
 556         } else {
 557                 return (ENOENT);
 558         }
 559 }
 560
 561 /*
 562  * Release all resources
 563  */
 564 void
 565 cs_release_resources(device_t dev)
 566 {
 567         struct cs_softc *sc = device_get_softc(dev);
 568
 569         if (sc->port_res) {
 570                 bus_release_resource(dev, SYS_RES_IOPORT,
 571                                      sc->port_rid, sc->port_res);
 572                 sc->port_res = 0;
 573         }
 574         if (sc->mem_res) {
 575                 bus_release_resource(dev, SYS_RES_MEMORY,
 576                                      sc->mem_rid, sc->mem_res);
 577                 sc->mem_res = 0;
 578         }
 579         if (sc->irq_res) {
 580                 bus_release_resource(dev, SYS_RES_IRQ,
 581                                      sc->irq_rid, sc->irq_res);
 582                 sc->irq_res = 0;
 583         }
 584 }
 585
 586 /*
 587  * Install the interface into kernel networking data structures
 588  */
 589 int
 590 cs_attach(device_t dev)
 591 {
 592         struct cs_softc *sc = device_get_softc(dev);
 593         int media = 0, error;
 594         struct ifnet *ifp = &sc->arpcom.ac_if;
 595
 596         /*
 597          * Initialize the media structures.
 598          */
 599         ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
 600
 601         KASSERT(sc->port_used > 0 || sc->mem_used > 0,
 602                 ("%s: either I/O port or I/O memory should be used",
 603                  device_get_nameunit(dev)));
 604         if (sc->port_used > 0)
 605                 cs_alloc_port(dev, sc->port_rid, sc->port_used);
 606         if (sc->mem_used > 0)
 607                 cs_alloc_memory(dev, sc->mem_rid, sc->mem_used);
 608
 609         error = cs_alloc_irq(dev, sc->irq_rid, 0);
 610         if (error) {
 611                 device_printf(dev, "Couldn't allocate irq");
 612                 goto bad;
 613         }
 614
 615         cs_stop(sc);
 616
 617         ifp->if_softc=sc;
 618         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 619         ifp->if_start=cs_start;
 620         ifp->if_ioctl=cs_ioctl;
 621         ifp->if_watchdog=cs_watchdog;
 622         ifp->if_init=cs_init;
 623         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 624         ifq_set_ready(&ifp->if_snd);
 625
 626 #if 0
 627         /*
 628          *  MIB DATA
 629          */
 630         ifp->if_linkmib=&sc->mibdata;
 631         ifp->if_linkmiblen=sizeof sc->mibdata;
 632 #endif
 633
 634         ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST );
 635
 636 #if 0
 637         /*
 638          * this code still in progress (DMA support)
 639          */
 640         sc->recv_ring=malloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_WAITOK);
 641         if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
 642             < (128*1024-CS_DMA_BUFFER_SIZE))
 643             sc->recv_ring+=16*1024;
 644 #endif
 645
 646         sc->buffer=malloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_WAITOK);
 647
 648         if (sc->adapter_cnf & A_CNF_10B_T) {
 649                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
 650                 if (sc->chip_type != CS8900) {
 651                         ifmedia_add(&sc->media,
 652                                 IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
 653                         ifmedia_add(&sc->media,
 654                                 IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
 655                 }
 656         }
 657
 658         if (sc->adapter_cnf & A_CNF_10B_2)
 659                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
 660
 661         if (sc->adapter_cnf & A_CNF_AUI)
 662                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
 663
 664         if (sc->adapter_cnf & A_CNF_MEDIA)
 665                 ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
 666
 667         /* Set default media from EEPROM */
 668         switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
 669         case A_CNF_MEDIA_AUTO:  media = IFM_ETHER|IFM_AUTO; break;
 670         case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
 671         case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
 672         case A_CNF_MEDIA_AUI:   media = IFM_ETHER|IFM_10_5; break;
 673         default: device_printf(dev, "adapter has no media\n");
 674         }
 675         ifmedia_set(&sc->media, media);
 676         cs_mediaset(sc, media);
 677
 678         ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
 679
 680         error = bus_setup_intr(dev, sc->irq_res, INTR_NETSAFE,
 681                                csintr, sc, &sc->irq_handle,
 682                                ifp->if_serializer);
 683         if (error) {
 684                 device_printf(dev, "Couldn't set up irq");
 685                 ether_ifdetach(ifp);
 686                 goto bad;
 687         }
 688
 689         return 0;
 690
 691 bad:
 692         cs_detach(dev);
 693         return error;
 694 }
 695
 696 int
 697 cs_detach(device_t dev)
 698 {
 699         struct cs_softc *sc = device_get_softc(dev);
 700         struct ifnet *ifp = &sc->arpcom.ac_if;
 701
 702         if (device_is_attached(dev)) {
 703                 lwkt_serialize_enter(ifp->if_serializer);
 704                 cs_stop(sc);
 705                 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 706                 lwkt_serialize_exit(ifp->if_serializer);
 707
 708                 ether_ifdetach(&sc->arpcom.ac_if);
 709         }
 710
 711 #if 0
 712         /*
 713          * this code still in progress (DMA support)
 714          */
 715         if (sc->recv_ring != NULL)
 716                 free(sc->recv_ring, M_DEVBUF);
 717 #endif
 718
 719         if (sc->buffer != NULL)
 720                 free(sc->buffer, M_DEVBUF);
 721         cs_release_resources(dev);
 722         ifmedia_removeall(&sc->media);
 723
 724         return 0;
 725 }
 726
 727 /*
 728  * Initialize the board
 729  */
 730 static void
 731 cs_init(void *xsc)
 732 {
 733         struct cs_softc *sc=(struct cs_softc *)xsc;
 734         struct ifnet *ifp = &sc->arpcom.ac_if;
 735         int i, rx_cfg;
 736
 737         /*
 738          * reset whatchdog timer
 739          */
 740         ifp->if_timer=0;
 741         sc->buf_len = 0;
 742
 743         /*
 744          * Hardware initialization of cs
 745          */
 746
 747         /* Enable receiver and transmitter */
 748         cs_writereg(sc->nic_addr, PP_LineCTL,
 749                 cs_readreg( sc->nic_addr, PP_LineCTL ) |
 750                 SERIAL_RX_ON | SERIAL_TX_ON);
 751
 752         /* Configure the receiver mode */
 753         cs_setmode(sc);
 754
 755         /*
 756          * This defines what type of frames will cause interrupts
 757          * Bad frames should generate interrupts so that the driver
 758          * could track statistics of discarded packets
 759          */
 760         rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
 761                  RX_EXTRA_DATA_ENBL;
 762         if (sc->isa_config & STREAM_TRANSFER)
 763                 rx_cfg |= RX_STREAM_ENBL;
 764         cs_writereg(sc->nic_addr, PP_RxCFG, rx_cfg);
 765
 766         cs_writereg(sc->nic_addr, PP_TxCFG, TX_LOST_CRS_ENBL |
 767                     TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
 768                     TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 769
 770         cs_writereg(sc->nic_addr, PP_BufCFG, READY_FOR_TX_ENBL |
 771                     RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
 772                     TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
 773
 774         /* Write MAC address into IA filter */
 775         for (i=0; i<ETHER_ADDR_LEN/2; i++)
 776                 cs_writereg(sc->nic_addr, PP_IA+i*2,
 777                             sc->arpcom.ac_enaddr[i*2] |
 778                             (sc->arpcom.ac_enaddr[i*2+1] << 8) );
 779
 780         /*
 781          * Now enable everything
 782          */
 783 /*
 784 #ifdef  CS_USE_64K_DMA
 785         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
 786         #else
 787
 788         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 789 #endif
 790 */
 791         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 792
 793         /*
 794          * Set running and clear output active flags
 795          */
 796         sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
 797         sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
 798
 799         /*
 800          * Start sending process
 801          */
 802         cs_start(ifp);
 803 }
 804
 805 /*
 806  * Get the packet from the board and send it to the upper layer
 807  * via ether_input().
 808  */
 809 static int
 810 cs_get_packet(struct cs_softc *sc)
 811 {
 812         struct ifnet *ifp = &(sc->arpcom.ac_if);
 813         int iobase = sc->nic_addr, status, length;
 814         struct mbuf *m;
 815
 816 #ifdef CS_DEBUG
 817         int i;
 818 #endif
 819
 820         status = inw(iobase + RX_FRAME_PORT);
 821         length = inw(iobase + RX_FRAME_PORT);
 822
 823 #ifdef CS_DEBUG
 824         if_printf(ifp, "rcvd: stat %x, len %d\n", status, length);
 825 #endif
 826
 827         if (!(status & RX_OK)) {
 828 #ifdef CS_DEBUG
 829                 if_printf(ifp, "bad pkt stat %x\n", status);
 830 #endif
 831                 ifp->if_ierrors++;
 832                 return -1;
 833         }
 834
 835         MGETHDR(m, MB_DONTWAIT, MT_DATA);
 836         if (m==NULL)
 837                 return -1;
 838
 839         if (length > MHLEN) {
 840                 MCLGET(m, MB_DONTWAIT);
 841                 if (!(m->m_flags & M_EXT)) {
 842                         m_freem(m);
 843                         return -1;
 844                 }
 845         }
 846
 847         /* Initialize packet's header info */
 848         m->m_pkthdr.rcvif = ifp;
 849         m->m_pkthdr.len = length;
 850         m->m_len = length;
 851
 852         /* Get the data */
 853         insw(iobase + RX_FRAME_PORT, m->m_data, (length+1)>>1);
 854
 855 #ifdef CS_DEBUG
 856         for (i=0;i<length;i++)
 857              printf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
 858         printf( "\n" );
 859 #endif
 860
 861         if (status & (RX_IA | RX_BROADCAST) ||
 862             (ifp->if_flags & IFF_MULTICAST && status & RX_HASHED)) {
 863                 ifp->if_input(ifp, m);
 864
 865                 ifp->if_ipackets++;
 866
 867                 if (length==ETHER_MAX_LEN-ETHER_CRC_LEN)
 868                         DELAY( cs_recv_delay );
 869         } else {
 870                 m_freem(m);
 871         }
 872
 873         return 0;
 874 }
 875
 876 /*
 877  * Handle interrupts
 878  */
 879 static void
 880 csintr(void *arg)
 881 {
 882         struct cs_softc *sc = (struct cs_softc*) arg;
 883         struct ifnet *ifp = &(sc->arpcom.ac_if);
 884         int status;
 885
 886 #ifdef CS_DEBUG
 887         if_printf(ifp, "Interrupt.\n");
 888 #endif
 889
 890         while ((status=cs_readword(sc->nic_addr, ISQ_PORT))) {
 891
 892 #ifdef CS_DEBUG
 893                 if_printf(ifp, "from ISQ: %04x\n", status);
 894 #endif
 895
 896                 switch (status & ISQ_EVENT_MASK) {
 897                 case ISQ_RECEIVER_EVENT:
 898                         cs_get_packet(sc);
 899                         break;
 900
 901                 case ISQ_TRANSMITTER_EVENT:
 902                         if (status & TX_OK)
 903                                 ifp->if_opackets++;
 904                         else
 905                                 ifp->if_oerrors++;
 906                         ifp->if_flags &= ~IFF_OACTIVE;
 907                         ifp->if_timer = 0;
 908                         break;
 909
 910                 case ISQ_BUFFER_EVENT:
 911                         if (status & READY_FOR_TX) {
 912                                 ifp->if_flags &= ~IFF_OACTIVE;
 913                                 ifp->if_timer = 0;
 914                         }
 915
 916                         if (status & TX_UNDERRUN) {
 917                                 ifp->if_flags &= ~IFF_OACTIVE;
 918                                 ifp->if_timer = 0;
 919                                 ifp->if_oerrors++;
 920                         }
 921                         break;
 922
 923                 case ISQ_RX_MISS_EVENT:
 924                         ifp->if_ierrors+=(status>>6);
 925                         break;
 926
 927                 case ISQ_TX_COL_EVENT:
 928                         ifp->if_collisions+=(status>>6);
 929                         break;
 930                 }
 931         }
 932
 933         if (!(ifp->if_flags & IFF_OACTIVE)) {
 934                 cs_start(ifp);
 935         }
 936 }
 937
 938 /*
 939  * Save the data in buffer
 940  */
 941
 942 static void
 943 cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
 944 {
 945         int len;
 946         struct mbuf *mp;
 947         unsigned char *data, *buf;
 948
 949         for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
 950                 len = mp->m_len;
 951
 952                 /*
 953                  * Ignore empty parts
 954                  */
 955                 if (!len)
 956                 continue;
 957
 958                 /*
 959                  * Find actual data address
 960                  */
 961                 data = mtod(mp, caddr_t);
 962
 963                 bcopy((caddr_t) data, (caddr_t) buf, len);
 964                 buf += len;
 965                 sc->buf_len += len;
 966         }
 967 }
 968
 969
 970 static void
 971 cs_xmit_buf( struct cs_softc *sc )
 972 {
 973         outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
 974         sc->buf_len = 0;
 975 }
 976
 977 static void
 978 cs_start(struct ifnet *ifp)
 979 {
 980         int length;
 981         struct mbuf *m, *mp;
 982         struct cs_softc *sc = ifp->if_softc;
 983
 984         for (;;) {
 985                 if (sc->buf_len)
 986                         length = sc->buf_len;
 987                 else {
 988                         m = ifq_dequeue(&ifp->if_snd, NULL);
 989
 990                         if (m==NULL) {
 991                                 return;
 992                         }
 993
 994                         for (length=0, mp=m; mp != NULL; mp=mp->m_next)
 995                                 length += mp->m_len;
 996
 997                         /* Skip zero-length packets */
 998                         if (length == 0) {
 999                                 m_freem(m);
1000                                 continue;
1001                         }
1002
1003                         cs_write_mbufs(sc, m);
1004
1005                         BPF_MTAP(ifp, m);
1006
1007                         m_freem(m);
1008                 }
1009
1010                 /*
1011                  * Issue a SEND command
1012                  */
1013                 outw(sc->nic_addr+TX_CMD_PORT, sc->send_cmd);
1014                 outw(sc->nic_addr+TX_LEN_PORT, length );
1015
1016                 /*
1017                  * If there's no free space in the buffer then leave
1018                  * this packet for the next time: indicate output active
1019                  * and return.
1020                  */
1021                 if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
1022                         ifp->if_timer = sc->buf_len;
1023                         ifp->if_flags |= IFF_OACTIVE;
1024                         return;
1025                 }
1026
1027                 cs_xmit_buf(sc);
1028
1029                 /*
1030                  * Set the watchdog timer in case we never hear
1031                  * from board again. (I don't know about correct
1032                  * value for this timeout)
1033                  */
1034                 ifp->if_timer = length;
1035
1036                 ifp->if_flags |= IFF_OACTIVE;
1037                 return;
1038         }
1039 }
1040
1041 /*
1042  * Stop everything on the interface
1043  */
1044 static void
1045 cs_stop(struct cs_softc *sc)
1046 {
1047         cs_writereg(sc->nic_addr, PP_RxCFG, 0);
1048         cs_writereg(sc->nic_addr, PP_TxCFG, 0);
1049         cs_writereg(sc->nic_addr, PP_BufCFG, 0);
1050         cs_writereg(sc->nic_addr, PP_BusCTL, 0);
1051
1052         sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1053         sc->arpcom.ac_if.if_timer = 0;
1054 }
1055
1056 /*
1057  * Reset the interface
1058  */
1059 static void
1060 cs_reset(struct cs_softc *sc)
1061 {
1062         cs_stop(sc);
1063         cs_init(sc);
1064 }
1065
1066 static void
1067 cs_setmode(struct cs_softc *sc)
1068 {
1069         struct ifnet *ifp = &(sc->arpcom.ac_if);
1070         int rx_ctl;
1071
1072         /* Stop the receiver while changing filters */
1073         cs_writereg(sc->nic_addr, PP_LineCTL,
1074                         cs_readreg(sc->nic_addr, PP_LineCTL) & ~SERIAL_RX_ON);
1075
1076         if (ifp->if_flags & IFF_PROMISC) {
1077                 /* Turn on promiscuous mode. */
1078                 rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
1079         } else {
1080                 if (ifp->if_flags & IFF_MULTICAST) {
1081                         /* Allow receiving frames with multicast addresses */
1082                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1083                                  RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
1084                         /*
1085                          * Here the reconfiguration of chip's multicast
1086                          * filters should be done but I've no idea about
1087                          * hash transformation in this chip. If you can
1088                          * add this code or describe me the transformation
1089                          * I'd be very glad.
1090                          */
1091                 } else {
1092                         /*
1093                          * Receive only good frames addressed for us and
1094                          * good broadcasts.
1095                          */
1096                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1097                                  RX_OK_ACCEPT;
1098                 }
1099         }
1100
1101         /* Set up the filter */
1102         cs_writereg(sc->nic_addr, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
1103
1104         /* Turn on receiver */
1105         cs_writereg(sc->nic_addr, PP_LineCTL,
1106                         cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_RX_ON);
1107 }
1108
1109 static int
1110 cs_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1111 {
1112         struct cs_softc *sc=ifp->if_softc;
1113         struct ifreq *ifr = (struct ifreq *)data;
1114         int error=0;
1115
1116 #ifdef CS_DEBUG
1117         if_printf(ifp, "ioctl(%lx)\n", command);
1118 #endif
1119
1120         switch (command) {
1121         case SIOCSIFFLAGS:
1122                 /*
1123                  * Switch interface state between "running" and
1124                  * "stopped", reflecting the UP flag.
1125                  */
1126                 if (sc->arpcom.ac_if.if_flags & IFF_UP) {
1127                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
1128                                 cs_init(sc);
1129                         }
1130                 } else {
1131                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
1132                                 cs_stop(sc);
1133                         }
1134                 }
1135                 /*
1136                  * Promiscuous and/or multicast flags may have changed,
1137                  * so reprogram the multicast filter and/or receive mode.
1138                  *
1139                  * See note about multicasts in cs_setmode
1140                  */
1141                 cs_setmode(sc);
1142                 break;
1143
1144         case SIOCADDMULTI:
1145         case SIOCDELMULTI:
1146             /*
1147              * Multicast list has changed; set the hardware filter
1148              * accordingly.
1149              *
1150              * See note about multicasts in cs_setmode
1151              */
1152             cs_setmode(sc);
1153             error = 0;
1154             break;
1155
1156         case SIOCSIFMEDIA:
1157         case SIOCGIFMEDIA:
1158                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1159                 break;
1160         default:
1161                 error = ether_ioctl(ifp, command, data);
1162                 break;
1163         }
1164
1165         return error;
1166 }
1167
1168 /*
1169  * Device timeout/watchdog routine. Entered if the device neglects to
1170  * generate an interrupt after a transmit has been started on it.
1171  */
1172 static void
1173 cs_watchdog(struct ifnet *ifp)
1174 {
1175         struct cs_softc *sc = ifp->if_softc;
1176
1177         ifp->if_oerrors++;
1178         log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
1179
1180         /* Reset the interface */
1181         if (ifp->if_flags & IFF_UP)
1182                 cs_reset(sc);
1183         else
1184                 cs_stop(sc);
1185 }
1186
1187 static int
1188 cs_mediachange(struct ifnet *ifp)
1189 {
1190         struct cs_softc *sc = ifp->if_softc;
1191         struct ifmedia *ifm = &sc->media;
1192
1193         if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1194                 return EINVAL;
1195
1196         return cs_mediaset(sc, ifm->ifm_media);
1197 }
1198
1199 static void
1200 cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
1201 {
1202         int line_status;
1203         struct cs_softc *sc = ifp->if_softc;
1204
1205         ifmr->ifm_active = IFM_ETHER;
1206         line_status = cs_readreg(sc->nic_addr, PP_LineST);
1207         if (line_status & TENBASET_ON) {
1208                 ifmr->ifm_active |= IFM_10_T;
1209                 if (sc->chip_type != CS8900) {
1210                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & FDX_ACTIVE)
1211                                 ifmr->ifm_active |= IFM_FDX;
1212                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & HDX_ACTIVE)
1213                                 ifmr->ifm_active |= IFM_HDX;
1214                 }
1215                 ifmr->ifm_status = IFM_AVALID;
1216                 if (line_status & LINK_OK)
1217                         ifmr->ifm_status |= IFM_ACTIVE;
1218         } else {
1219                 if (line_status & AUI_ON) {
1220                         cs_writereg(sc->nic_addr, PP_SelfCTL,
1221                                     cs_readreg(sc->nic_addr, PP_SelfCTL) |
1222                                     HCB1_ENBL);
1223                         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
1224                             (cs_readreg(sc->nic_addr, PP_SelfCTL)&HCB1))
1225                                 ifmr->ifm_active |= IFM_10_2;
1226                         else
1227                                 ifmr->ifm_active |= IFM_10_5;
1228                 }
1229         }
1230 }
1231
1232 static int
1233 cs_mediaset(struct cs_softc *sc, int media)
1234 {
1235         int error;
1236
1237         /* Stop the receiver & transmitter */
1238         cs_writereg(sc->nic_addr, PP_LineCTL,
1239                     cs_readreg(sc->nic_addr, PP_LineCTL) &
1240                     ~(SERIAL_RX_ON | SERIAL_TX_ON));
1241
1242 #ifdef CS_DEBUG
1243         if_printf(&sc->arpcom.ac_if, "cs_setmedia(%x)\n", media);
1244 #endif
1245
1246         switch (IFM_SUBTYPE(media)) {
1247         default:
1248         case IFM_AUTO:
1249                 if ((error=enable_tp(sc))==0)
1250                         error = cs_duplex_auto(sc);
1251                 else if ((error=enable_bnc(sc)) != 0)
1252                         error = enable_aui(sc);
1253                 break;
1254         case IFM_10_T:
1255                 if ((error=enable_tp(sc)) != 0)
1256                         break;
1257                 if (media & IFM_FDX)
1258                         cs_duplex_full(sc);
1259                 else if (media & IFM_HDX)
1260                         cs_duplex_half(sc);
1261                 else
1262                         error = cs_duplex_auto(sc);
1263                 break;
1264         case IFM_10_2:
1265                 error = enable_bnc(sc);
1266                 break;
1267         case IFM_10_5:
1268                 error = enable_aui(sc);
1269                 break;
1270         }
1271
1272         /*
1273          * Turn the transmitter & receiver back on
1274          */
1275         cs_writereg(sc->nic_addr, PP_LineCTL,
1276                     cs_readreg( sc->nic_addr, PP_LineCTL ) |
1277                     SERIAL_RX_ON | SERIAL_TX_ON);
1278
1279         return error;
1280 }