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 1.30 2008/08/17 04:32:33 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/interrupt.h>
  43 #include <sys/malloc.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/socket.h>
  46 #include <sys/sockio.h>
  47 #include <sys/kernel.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/syslog.h>
  50 #include <sys/module.h>
  51 #include <sys/bus.h>
  52 #include <sys/rman.h>
  53 #include <sys/thread2.h>
  54
  55 #include <machine/clock.h>
  56
  57 #include <net/if.h>
  58 #include <net/ifq_var.h>
  59 #include <net/if_arp.h>
  60 #include <net/if_media.h>
  61 #include <net/ethernet.h>
  62 #include <net/bpf.h>
  63
  64 #include "if_csreg.h"
  65 #include "if_csvar.h"
  66
  67 #ifdef  CS_USE_64K_DMA
  68 #define CS_DMA_BUFFER_SIZE 65536
  69 #else
  70 #define CS_DMA_BUFFER_SIZE 16384
  71 #endif
  72
  73 static int      cs_recv_delay = 570;
  74 SYSCTL_INT(_machdep, OID_AUTO, cs_recv_delay, CTLFLAG_RW, &cs_recv_delay, 0, "");
  75
  76 static void     cs_init(void *);
  77 static int      cs_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
  78 static void     cs_start(struct ifnet *);
  79 static void     cs_stop(struct cs_softc *);
  80 static void     cs_reset(struct cs_softc *);
  81 static void     cs_watchdog(struct ifnet *);
  82 static void     csintr(void *);
  83
  84 static int      cs_mediachange(struct ifnet *);
  85 static void     cs_mediastatus(struct ifnet *, struct ifmediareq *);
  86 static int      cs_mediaset(struct cs_softc *, int);
  87
  88 static void     cs_write_mbufs(struct cs_softc*, struct mbuf*);
  89 static void     cs_xmit_buf(struct cs_softc*);
  90 static int      cs_get_packet(struct cs_softc*);
  91 static void     cs_setmode(struct cs_softc*);
  92
  93 static int      get_eeprom_data(device_t, int, int, int *);
  94 static int      get_eeprom_cksum(int, int, int *);
  95 static int      wait_eeprom_ready( struct cs_softc *);
  96 static void     control_dc_dc(struct cs_softc *, int );
  97 static int      send_test_pkt(struct cs_softc * );
  98 static int      enable_tp(struct cs_softc *);
  99 static int      enable_aui(struct cs_softc *);
 100 static int      enable_bnc(struct cs_softc *);
 101 static int      cs_duplex_auto(struct cs_softc *);
 102
 103 devclass_t cs_devclass;
 104
 105 DECLARE_DUMMY_MODULE(if_cs);
 106
 107 static int
 108 get_eeprom_data(device_t dev, int off, int len, int *buffer)
 109 {
 110         struct cs_softc *sc;
 111         int i;
 112
 113         sc = device_get_softc(dev);
 114
 115 #ifdef CS_DEBUG
 116         device_printf(dev, "EEPROM data from %x for %x:\n", off, len);
 117 #endif
 118
 119         for (i=0;i<len;i++) {
 120                 if (wait_eeprom_ready(sc) < 0) return -1;
 121                 /* Send command to EEPROM to read */
 122                 cs_writereg(sc->nic_addr, PP_EECMD, (off+i)|EEPROM_READ_CMD );
 123                 if (wait_eeprom_ready(sc)<0)
 124                         return -1;
 125                 buffer[i] = cs_readreg (sc->nic_addr, PP_EEData);
 126
 127 #ifdef CS_DEBUG
 128                 kprintf("%02x %02x ",(unsigned char)buffer[i],
 129                                         (unsigned char)buffer[i+1]);
 130 #endif
 131         }
 132
 133 #ifdef CS_DEBUG
 134         kprintf("\n");
 135 #endif
 136
 137         return 0;
 138 }
 139
 140 static int
 141 get_eeprom_cksum(int off, int len, int *buffer)
 142 {
 143         int i,cksum=0;
 144
 145         for (i=0;i<len;i++)
 146                 cksum+=buffer[i];
 147         cksum &= 0xffff;
 148         if (cksum==0)
 149                 return 0;
 150         return -1;
 151 }
 152
 153 static int
 154 wait_eeprom_ready(struct cs_softc *sc)
 155 {
 156         DELAY ( 30000 );        /* XXX should we do some checks here ? */
 157         return 0;
 158 }
 159
 160 static void
 161 control_dc_dc(struct cs_softc *sc, int on_not_off)
 162 {
 163         unsigned int self_control = HCB1_ENBL;
 164
 165         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0) ^ on_not_off)
 166                 self_control |= HCB1;
 167         else
 168                 self_control &= ~HCB1;
 169         cs_writereg( sc->nic_addr, PP_SelfCTL, self_control );
 170
 171         DELAY( 500000 );
 172 }
 173
 174
 175 static int
 176 cs_duplex_auto(struct cs_softc *sc)
 177 {
 178         int i, error=0;
 179
 180         cs_writereg(sc->nic_addr, PP_AutoNegCTL,
 181                     RE_NEG_NOW | ALLOW_FDX | AUTO_NEG_ENABLE );
 182         for (i=0; cs_readreg(sc->nic_addr,PP_AutoNegST)&AUTO_NEG_BUSY; i++) {
 183                 if (i > 40000) {
 184                         if_printf(&sc->arpcom.ac_if, "full/half duplex "
 185                                   "auto negotiation timeout\n");
 186                         error = ETIMEDOUT;
 187                         break;
 188                 }
 189                 DELAY(1000);
 190         }
 191         DELAY( 1000000 );
 192         return error;
 193 }
 194
 195 static int
 196 enable_tp(struct cs_softc *sc)
 197 {
 198         cs_writereg(sc->nic_addr, PP_LineCTL, sc->line_ctl & ~AUI_ONLY);
 199         control_dc_dc(sc, 0);
 200         DELAY( 150000 );
 201
 202         if ((cs_readreg(sc->nic_addr, PP_LineST) & LINK_OK)==0) {
 203                 if_printf(&sc->arpcom.ac_if, "failed to enable TP\n");
 204                 return EINVAL;
 205         }
 206
 207         return 0;
 208 }
 209
 210 /*
 211  * XXX This was rewritten from Linux driver without any tests.
 212  */
 213 static int
 214 send_test_pkt(struct cs_softc *sc)
 215 {
 216         char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
 217                                 0, 46,  /* A 46 in network order */
 218                                 0, 0,   /* DSAP=0 & SSAP=0 fields */
 219                                 0xf3, 0 /* Control (Test Req + P bit set) */ };
 220         int i;
 221         u_char ether_address_backup[ETHER_ADDR_LEN];
 222
 223         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 224                 ether_address_backup[i] = sc->arpcom.ac_enaddr[i];
 225         }
 226
 227         cs_writereg(sc->nic_addr, PP_LineCTL,
 228                 cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_TX_ON );
 229         bcopy(test_packet,
 230                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 231         bcopy(test_packet+ETHER_ADDR_LEN,
 232                         sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
 233         outw(sc->nic_addr + TX_CMD_PORT, sc->send_cmd);
 234         outw(sc->nic_addr + TX_LEN_PORT, sizeof(test_packet));
 235
 236         /* Wait for chip to allocate memory */
 237         DELAY(50000);
 238         if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
 239                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 240                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 241                 }
 242                 return 0;
 243         }
 244
 245         outsw(sc->nic_addr + TX_FRAME_PORT, test_packet, sizeof(test_packet));
 246
 247         DELAY(30000);
 248
 249         if ((cs_readreg(sc->nic_addr,PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
 250                 for (i = 0; i < ETHER_ADDR_LEN; i++) {
 251                         sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 252                 }
 253                 return 1;
 254         }
 255         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 256                 sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
 257         }
 258         return 0;
 259 }
 260
 261 /*
 262  * XXX This was rewritten from Linux driver without any tests.
 263  */
 264 static int
 265 enable_aui(struct cs_softc *sc)
 266 {
 267         control_dc_dc(sc, 0);
 268         cs_writereg(sc->nic_addr, PP_LineCTL,
 269                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 270
 271         if (!send_test_pkt(sc)) {
 272                 if_printf(&sc->arpcom.ac_if, "failed to enable AUI\n");
 273                 return EINVAL;
 274         }
 275         return 0;
 276 }
 277
 278 /*
 279  * XXX This was rewritten from Linux driver without any tests.
 280  */
 281 static int
 282 enable_bnc(struct cs_softc *sc)
 283 {
 284         control_dc_dc(sc, 1);
 285         cs_writereg(sc->nic_addr, PP_LineCTL,
 286                 (sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
 287
 288         if (!send_test_pkt(sc)) {
 289                 if_printf(&sc->arpcom.ac_if, "failed to enable BNC\n");
 290                 return EINVAL;
 291         }
 292         return 0;
 293 }
 294
 295 int
 296 cs_cs89x0_probe(device_t dev)
 297 {
 298         int i;
 299         int iobase;
 300         int error;
 301
 302         u_long irq, junk;
 303
 304         struct cs_softc *sc = device_get_softc(dev);
 305
 306         unsigned rev_type = 0;
 307         char chip_revision;
 308         int eeprom_buff[CHKSUM_LEN];
 309         int chip_type, pp_isaint, pp_isadma;
 310
 311         error = cs_alloc_port(dev, 0, CS_89x0_IO_PORTS);
 312         if (error)
 313                 return (error);
 314
 315         iobase=rman_get_start(sc->port_res);
 316
 317         if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG) {
 318                 /* Chip not detected. Let's try to reset it */
 319                 if (bootverbose)
 320                         device_printf(dev, "trying to reset the chip.\n");
 321                 outw(iobase+ADD_PORT, PP_SelfCTL);
 322                 i = inw(iobase+DATA_PORT);
 323                 outw(iobase+ADD_PORT, PP_SelfCTL);
 324                 outw(iobase+DATA_PORT, i | POWER_ON_RESET);
 325                 if ((inw(iobase+ADD_PORT) & ADD_MASK) != ADD_SIG)
 326                         return (ENXIO);
 327         }
 328
 329         outw(iobase+ADD_PORT, PP_ChipID);
 330         if (inw(iobase+DATA_PORT) != CHIP_EISA_ID_SIG)
 331                 return (ENXIO);
 332
 333         rev_type = cs_readreg(iobase, PRODUCT_ID_ADD);
 334         chip_type = rev_type & ~REVISON_BITS;
 335         chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 336
 337         sc->nic_addr = iobase;
 338         sc->chip_type = chip_type;
 339
 340         if(chip_type==CS8900) {
 341                 pp_isaint = PP_CS8900_ISAINT;
 342                 pp_isadma = PP_CS8900_ISADMA;
 343                 sc->send_cmd = TX_CS8900_AFTER_ALL;
 344         } else {
 345                 pp_isaint = PP_CS8920_ISAINT;
 346                 pp_isadma = PP_CS8920_ISADMA;
 347                 sc->send_cmd = TX_CS8920_AFTER_ALL;
 348         }
 349
 350         /*
 351          * Clear some fields so that fail of EEPROM will left them clean
 352          */
 353         sc->auto_neg_cnf = 0;
 354         sc->adapter_cnf  = 0;
 355         sc->isa_config   = 0;
 356
 357         /*
 358          * If no interrupt specified (or "?"), use what the board tells us.
 359          */
 360         error = bus_get_resource(dev, SYS_RES_IRQ, 0, &irq, &junk);
 361
 362         /*
 363          * Get data from EEPROM
 364          */
 365         if((cs_readreg(iobase, PP_SelfST) & EEPROM_PRESENT) == 0) {
 366                 device_printf(dev, "No EEPROM, assuming defaults.\n");
 367         } else {
 368                 if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN,
 369                                     eeprom_buff)<0) {
 370                         device_printf(dev, "EEPROM read failed, "
 371                                 "assuming defaults.\n");
 372                 } else {
 373                         if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
 374                                 device_printf(dev, "EEPROM cheksum bad, "
 375                                         "assuming defaults.\n");
 376                         } else {
 377                                 sc->auto_neg_cnf =
 378                                         eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
 379                                 sc->adapter_cnf =
 380                                         eeprom_buff[ADAPTER_CNF_OFFSET/2];
 381                                 sc->isa_config =
 382                                         eeprom_buff[ISA_CNF_OFFSET/2];
 383
 384                                 for (i=0; i<ETHER_ADDR_LEN/2; i++) {
 385                                         sc->arpcom.ac_enaddr[i*2]=
 386                                                 eeprom_buff[i];
 387                                         sc->arpcom.ac_enaddr[i*2+1]=
 388                                                 eeprom_buff[i] >> 8;
 389                                 }
 390
 391                                 /*
 392                                  * If no interrupt specified (or "?"),
 393                                  * use what the board tells us.
 394                                  */
 395                                 if (error) {
 396                                         irq = sc->isa_config & INT_NO_MASK;
 397                                         if (chip_type==CS8900) {
 398                                                 switch(irq) {
 399                                                  case 0:
 400                                                         irq=10;
 401                                                         error=0;
 402                                                         break;
 403                                                  case 1:
 404                                                         irq=11;
 405                                                         error=0;
 406                                                         break;
 407                                                  case 2:
 408                                                         irq=12;
 409                                                         error=0;
 410                                                         break;
 411                                                  case 3:
 412                                                         irq=5;
 413                                                         error=0;
 414                                                         break;
 415                                                  default:
 416                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 417                                                         error=EINVAL;
 418                                                 }
 419                                         } else {
 420                                                 if (irq>CS8920_NO_INTS) {
 421                                                         device_printf(dev, "invalid irq in EEPROM.\n");
 422                                                         error=EINVAL;
 423                                                 } else {
 424                                                         error=0;
 425                                                 }
 426                                         }
 427
 428                                         if (!error)
 429                                                 bus_set_resource(dev, SYS_RES_IRQ, 0,
 430                                                                 irq, 1);
 431                                 }
 432                         }
 433                 }
 434         }
 435
 436         if (!error) {
 437                 if (chip_type == CS8900) {
 438                         switch(irq) {
 439                                 case  5:
 440                                         irq = 3;
 441                                         break;
 442                                 case 10:
 443                                         irq = 0;
 444                                         break;
 445                                 case 11:
 446                                         irq = 1;
 447                                         break;
 448                                 case 12:
 449                                         irq = 2;
 450                                         break;
 451                                 default:
 452                                         error=EINVAL;
 453                         }
 454                 } else {
 455                         if (irq > CS8920_NO_INTS) {
 456                                 error = EINVAL;
 457                         }
 458                 }
 459         }
 460
 461         if (!error) {
 462                 cs_writereg(iobase, pp_isaint, irq);
 463         } else {
 464                 device_printf(dev, "Unknown or invalid irq\n");
 465                 return (ENXIO);
 466         }
 467
 468         /*
 469          * Temporary disabled
 470          *
 471         if (drq>0)
 472                 cs_writereg(iobase, pp_isadma, drq);
 473         else {
 474                 device_printf(dev, "incorrect drq\n");
 475                 return 0;
 476         }
 477         */
 478
 479         if (bootverbose)
 480                  device_printf(dev, "CS89%c0%s rev %c media%s%s%s\n",
 481                         chip_type==CS8900 ? '0' : '2',
 482                         chip_type==CS8920M ? "M" : "",
 483                         chip_revision,
 484                         (sc->adapter_cnf & A_CNF_10B_T) ? " TP"  : "",
 485                         (sc->adapter_cnf & A_CNF_AUI)   ? " AUI" : "",
 486                         (sc->adapter_cnf & A_CNF_10B_2) ? " BNC" : "");
 487
 488         if ((sc->adapter_cnf & A_CNF_EXTND_10B_2) &&
 489             (sc->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
 490                 sc->line_ctl = LOW_RX_SQUELCH;
 491         else
 492                 sc->line_ctl = 0;
 493
 494
 495         return 0;
 496 }
 497
 498 /*
 499  * Allocate a port resource with the given resource id.
 500  */
 501 int
 502 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
 523 cs_alloc_memory(device_t dev, int rid, int size)
 524 {
 525         struct cs_softc *sc = device_get_softc(dev);
 526         struct resource *res;
 527
 528         res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
 529                                  0ul, ~0ul, size, RF_ACTIVE);
 530         if (res) {
 531                 sc->mem_rid = rid;
 532                 sc->mem_res = res;
 533                 sc->mem_used = size;
 534                 return (0);
 535         } else {
 536                 return (ENOENT);
 537         }
 538 }
 539
 540 /*
 541  * Allocate an irq resource with the given resource id.
 542  */
 543 int
 544 cs_alloc_irq(device_t dev, int rid, int flags)
 545 {
 546         struct cs_softc *sc = device_get_softc(dev);
 547         struct resource *res;
 548
 549         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
 550             (RF_ACTIVE | flags));
 551         if (res) {
 552                 sc->irq_rid = rid;
 553                 sc->irq_res = res;
 554                 return (0);
 555         } else {
 556                 return (ENOENT);
 557         }
 558 }
 559
 560 /*
 561  * Release all resources
 562  */
 563 void
 564 cs_release_resources(device_t dev)
 565 {
 566         struct cs_softc *sc = device_get_softc(dev);
 567
 568         if (sc->port_res) {
 569                 bus_release_resource(dev, SYS_RES_IOPORT,
 570                                      sc->port_rid, sc->port_res);
 571                 sc->port_res = 0;
 572         }
 573         if (sc->mem_res) {
 574                 bus_release_resource(dev, SYS_RES_MEMORY,
 575                                      sc->mem_rid, sc->mem_res);
 576                 sc->mem_res = 0;
 577         }
 578         if (sc->irq_res) {
 579                 bus_release_resource(dev, SYS_RES_IRQ,
 580                                      sc->irq_rid, sc->irq_res);
 581                 sc->irq_res = 0;
 582         }
 583 }
 584
 585 /*
 586  * Install the interface into kernel networking data structures
 587  */
 588 int
 589 cs_attach(device_t dev)
 590 {
 591         struct cs_softc *sc = device_get_softc(dev);
 592         int media = 0, error;
 593         struct ifnet *ifp = &sc->arpcom.ac_if;
 594
 595         /*
 596          * Initialize the media structures.
 597          */
 598         ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
 599
 600         KASSERT(sc->port_used > 0 || sc->mem_used > 0,
 601                 ("%s: either I/O port or I/O memory should be used",
 602                  device_get_nameunit(dev)));
 603         if (sc->port_used > 0)
 604                 cs_alloc_port(dev, sc->port_rid, sc->port_used);
 605         if (sc->mem_used > 0)
 606                 cs_alloc_memory(dev, sc->mem_rid, sc->mem_used);
 607
 608         error = cs_alloc_irq(dev, sc->irq_rid, 0);
 609         if (error) {
 610                 device_printf(dev, "Couldn't allocate irq");
 611                 goto bad;
 612         }
 613
 614         cs_stop(sc);
 615
 616         ifp->if_softc=sc;
 617         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 618         ifp->if_start=cs_start;
 619         ifp->if_ioctl=cs_ioctl;
 620         ifp->if_watchdog=cs_watchdog;
 621         ifp->if_init=cs_init;
 622         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 623         ifq_set_ready(&ifp->if_snd);
 624
 625 #if 0
 626         /*
 627          *  MIB DATA
 628          */
 629         ifp->if_linkmib=&sc->mibdata;
 630         ifp->if_linkmiblen=sizeof sc->mibdata;
 631 #endif
 632
 633         ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST );
 634
 635 #if 0
 636         /*
 637          * this code still in progress (DMA support)
 638          */
 639         sc->recv_ring=kmalloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_WAITOK);
 640         if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
 641             < (128*1024-CS_DMA_BUFFER_SIZE))
 642             sc->recv_ring+=16*1024;
 643 #endif
 644
 645         sc->buffer=kmalloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_WAITOK);
 646
 647         if (sc->adapter_cnf & A_CNF_10B_T) {
 648                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
 649                 if (sc->chip_type != CS8900) {
 650                         ifmedia_add(&sc->media,
 651                                 IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
 652                         ifmedia_add(&sc->media,
 653                                 IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
 654                 }
 655         }
 656
 657         if (sc->adapter_cnf & A_CNF_10B_2)
 658                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
 659
 660         if (sc->adapter_cnf & A_CNF_AUI)
 661                 ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
 662
 663         if (sc->adapter_cnf & A_CNF_MEDIA)
 664                 ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
 665
 666         /* Set default media from EEPROM */
 667         switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
 668         case A_CNF_MEDIA_AUTO:  media = IFM_ETHER|IFM_AUTO; break;
 669         case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
 670         case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
 671         case A_CNF_MEDIA_AUI:   media = IFM_ETHER|IFM_10_5; break;
 672         default: device_printf(dev, "adapter has no media\n");
 673         }
 674         ifmedia_set(&sc->media, media);
 675         cs_mediaset(sc, media);
 676
 677         ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
 678
 679         error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
 680                                csintr, sc, &sc->irq_handle,
 681                                ifp->if_serializer);
 682         if (error) {
 683                 device_printf(dev, "Couldn't set up irq");
 684                 ether_ifdetach(ifp);
 685                 goto bad;
 686         }
 687
 688         ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->irq_res));
 689         KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus);
 690
 691         return 0;
 692
 693 bad:
 694         cs_detach(dev);
 695         return error;
 696 }
 697
 698 int
 699 cs_detach(device_t dev)
 700 {
 701         struct cs_softc *sc = device_get_softc(dev);
 702         struct ifnet *ifp = &sc->arpcom.ac_if;
 703
 704         if (device_is_attached(dev)) {
 705                 lwkt_serialize_enter(ifp->if_serializer);
 706                 cs_stop(sc);
 707                 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 708                 lwkt_serialize_exit(ifp->if_serializer);
 709
 710                 ether_ifdetach(&sc->arpcom.ac_if);
 711         }
 712
 713 #if 0
 714         /*
 715          * this code still in progress (DMA support)
 716          */
 717         if (sc->recv_ring != NULL)
 718                 kfree(sc->recv_ring, M_DEVBUF);
 719 #endif
 720
 721         if (sc->buffer != NULL)
 722                 kfree(sc->buffer, M_DEVBUF);
 723         cs_release_resources(dev);
 724         ifmedia_removeall(&sc->media);
 725
 726         return 0;
 727 }
 728
 729 /*
 730  * Initialize the board
 731  */
 732 static void
 733 cs_init(void *xsc)
 734 {
 735         struct cs_softc *sc=(struct cs_softc *)xsc;
 736         struct ifnet *ifp = &sc->arpcom.ac_if;
 737         int i, rx_cfg;
 738
 739         /*
 740          * reset whatchdog timer
 741          */
 742         ifp->if_timer=0;
 743         sc->buf_len = 0;
 744
 745         /*
 746          * Hardware initialization of cs
 747          */
 748
 749         /* Enable receiver and transmitter */
 750         cs_writereg(sc->nic_addr, PP_LineCTL,
 751                 cs_readreg( sc->nic_addr, PP_LineCTL ) |
 752                 SERIAL_RX_ON | SERIAL_TX_ON);
 753
 754         /* Configure the receiver mode */
 755         cs_setmode(sc);
 756
 757         /*
 758          * This defines what type of frames will cause interrupts
 759          * Bad frames should generate interrupts so that the driver
 760          * could track statistics of discarded packets
 761          */
 762         rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
 763                  RX_EXTRA_DATA_ENBL;
 764         if (sc->isa_config & STREAM_TRANSFER)
 765                 rx_cfg |= RX_STREAM_ENBL;
 766         cs_writereg(sc->nic_addr, PP_RxCFG, rx_cfg);
 767
 768         cs_writereg(sc->nic_addr, PP_TxCFG, TX_LOST_CRS_ENBL |
 769                     TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
 770                     TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 771
 772         cs_writereg(sc->nic_addr, PP_BufCFG, READY_FOR_TX_ENBL |
 773                     RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
 774                     TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
 775
 776         /* Write MAC address into IA filter */
 777         for (i=0; i<ETHER_ADDR_LEN/2; i++)
 778                 cs_writereg(sc->nic_addr, PP_IA+i*2,
 779                             sc->arpcom.ac_enaddr[i*2] |
 780                             (sc->arpcom.ac_enaddr[i*2+1] << 8) );
 781
 782         /*
 783          * Now enable everything
 784          */
 785 /*
 786 #ifdef  CS_USE_64K_DMA
 787         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
 788         #else
 789
 790         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 791 #endif
 792 */
 793         cs_writereg(sc->nic_addr, PP_BusCTL, ENABLE_IRQ);
 794
 795         /*
 796          * Set running and clear output active flags
 797          */
 798         sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
 799         sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
 800
 801         /*
 802          * Start sending process
 803          */
 804         if_devstart(&sc->arpcom.ac_if);
 805 }
 806
 807 /*
 808  * Get the packet from the board and send it to the upper layer
 809  * via ether_input().
 810  */
 811 static int
 812 cs_get_packet(struct cs_softc *sc)
 813 {
 814         struct ifnet *ifp = &(sc->arpcom.ac_if);
 815         int iobase = sc->nic_addr, status, length;
 816         struct mbuf *m;
 817
 818 #ifdef CS_DEBUG
 819         int i;
 820 #endif
 821
 822         status = inw(iobase + RX_FRAME_PORT);
 823         length = inw(iobase + RX_FRAME_PORT);
 824
 825 #ifdef CS_DEBUG
 826         if_printf(ifp, "rcvd: stat %x, len %d\n", status, length);
 827 #endif
 828
 829         if (!(status & RX_OK)) {
 830 #ifdef CS_DEBUG
 831                 if_printf(ifp, "bad pkt stat %x\n", status);
 832 #endif
 833                 ifp->if_ierrors++;
 834                 return -1;
 835         }
 836
 837         MGETHDR(m, MB_DONTWAIT, MT_DATA);
 838         if (m==NULL)
 839                 return -1;
 840
 841         if (length > MHLEN) {
 842                 MCLGET(m, MB_DONTWAIT);
 843                 if (!(m->m_flags & M_EXT)) {
 844                         m_freem(m);
 845                         return -1;
 846                 }
 847         }
 848
 849         /* Initialize packet's header info */
 850         m->m_pkthdr.rcvif = ifp;
 851         m->m_pkthdr.len = length;
 852         m->m_len = length;
 853
 854         /* Get the data */
 855         insw(iobase + RX_FRAME_PORT, m->m_data, (length+1)>>1);
 856
 857 #ifdef CS_DEBUG
 858         for (i=0;i<length;i++)
 859              kprintf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
 860         kprintf( "\n" );
 861 #endif
 862
 863         if (status & (RX_IA | RX_BROADCAST) ||
 864             (ifp->if_flags & IFF_MULTICAST && status & RX_HASHED)) {
 865                 ifp->if_input(ifp, m);
 866
 867                 ifp->if_ipackets++;
 868
 869                 if (length==ETHER_MAX_LEN-ETHER_CRC_LEN)
 870                         DELAY( cs_recv_delay );
 871         } else {
 872                 m_freem(m);
 873         }
 874
 875         return 0;
 876 }
 877
 878 /*
 879  * Handle interrupts
 880  */
 881 static void
 882 csintr(void *arg)
 883 {
 884         struct cs_softc *sc = (struct cs_softc*) arg;
 885         struct ifnet *ifp = &(sc->arpcom.ac_if);
 886         int status;
 887
 888 #ifdef CS_DEBUG
 889         if_printf(ifp, "Interrupt.\n");
 890 #endif
 891
 892         while ((status=cs_readword(sc->nic_addr, ISQ_PORT))) {
 893
 894 #ifdef CS_DEBUG
 895                 if_printf(ifp, "from ISQ: %04x\n", status);
 896 #endif
 897
 898                 switch (status & ISQ_EVENT_MASK) {
 899                 case ISQ_RECEIVER_EVENT:
 900                         cs_get_packet(sc);
 901                         break;
 902
 903                 case ISQ_TRANSMITTER_EVENT:
 904                         if (status & TX_OK)
 905                                 ifp->if_opackets++;
 906                         else
 907                                 ifp->if_oerrors++;
 908                         ifp->if_flags &= ~IFF_OACTIVE;
 909                         ifp->if_timer = 0;
 910                         break;
 911
 912                 case ISQ_BUFFER_EVENT:
 913                         if (status & READY_FOR_TX) {
 914                                 ifp->if_flags &= ~IFF_OACTIVE;
 915                                 ifp->if_timer = 0;
 916                         }
 917
 918                         if (status & TX_UNDERRUN) {
 919                                 ifp->if_flags &= ~IFF_OACTIVE;
 920                                 ifp->if_timer = 0;
 921                                 ifp->if_oerrors++;
 922                         }
 923                         break;
 924
 925                 case ISQ_RX_MISS_EVENT:
 926                         ifp->if_ierrors+=(status>>6);
 927                         break;
 928
 929                 case ISQ_TX_COL_EVENT:
 930                         ifp->if_collisions+=(status>>6);
 931                         break;
 932                 }
 933         }
 934
 935         if (!(ifp->if_flags & IFF_OACTIVE))
 936                 if_devstart(ifp);
 937 }
 938
 939 /*
 940  * Save the data in buffer
 941  */
 942
 943 static void
 944 cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
 945 {
 946         int len;
 947         struct mbuf *mp;
 948         unsigned char *data, *buf;
 949
 950         for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
 951                 len = mp->m_len;
 952
 953                 /*
 954                  * Ignore empty parts
 955                  */
 956                 if (!len)
 957                 continue;
 958
 959                 /*
 960                  * Find actual data address
 961                  */
 962                 data = mtod(mp, caddr_t);
 963
 964                 bcopy((caddr_t) data, (caddr_t) buf, len);
 965                 buf += len;
 966                 sc->buf_len += len;
 967         }
 968 }
 969
 970
 971 static void
 972 cs_xmit_buf( struct cs_softc *sc )
 973 {
 974         outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
 975         sc->buf_len = 0;
 976 }
 977
 978 static void
 979 cs_start(struct ifnet *ifp)
 980 {
 981         int length;
 982         struct mbuf *m, *mp;
 983         struct cs_softc *sc = ifp->if_softc;
 984
 985         for (;;) {
 986                 if (sc->buf_len)
 987                         length = sc->buf_len;
 988                 else {
 989                         m = ifq_dequeue(&ifp->if_snd, NULL);
 990
 991                         if (m==NULL) {
 992                                 return;
 993                         }
 994
 995                         for (length=0, mp=m; mp != NULL; mp=mp->m_next)
 996                                 length += mp->m_len;
 997
 998                         /* Skip zero-length packets */
 999                         if (length == 0) {
1000                                 m_freem(m);
1001                                 continue;
1002                         }
1003
1004                         cs_write_mbufs(sc, m);
1005
1006                         BPF_MTAP(ifp, m);
1007
1008                         m_freem(m);
1009                 }
1010
1011                 /*
1012                  * Issue a SEND command
1013                  */
1014                 outw(sc->nic_addr+TX_CMD_PORT, sc->send_cmd);
1015                 outw(sc->nic_addr+TX_LEN_PORT, length );
1016
1017                 /*
1018                  * If there's no free space in the buffer then leave
1019                  * this packet for the next time: indicate output active
1020                  * and return.
1021                  */
1022                 if (!(cs_readreg(sc->nic_addr, PP_BusST) & READY_FOR_TX_NOW)) {
1023                         ifp->if_timer = sc->buf_len;
1024                         ifp->if_flags |= IFF_OACTIVE;
1025                         return;
1026                 }
1027
1028                 cs_xmit_buf(sc);
1029
1030                 /*
1031                  * Set the watchdog timer in case we never hear
1032                  * from board again. (I don't know about correct
1033                  * value for this timeout)
1034                  */
1035                 ifp->if_timer = length;
1036
1037                 ifp->if_flags |= IFF_OACTIVE;
1038                 return;
1039         }
1040 }
1041
1042 /*
1043  * Stop everything on the interface
1044  */
1045 static void
1046 cs_stop(struct cs_softc *sc)
1047 {
1048         cs_writereg(sc->nic_addr, PP_RxCFG, 0);
1049         cs_writereg(sc->nic_addr, PP_TxCFG, 0);
1050         cs_writereg(sc->nic_addr, PP_BufCFG, 0);
1051         cs_writereg(sc->nic_addr, PP_BusCTL, 0);
1052
1053         sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1054         sc->arpcom.ac_if.if_timer = 0;
1055 }
1056
1057 /*
1058  * Reset the interface
1059  */
1060 static void
1061 cs_reset(struct cs_softc *sc)
1062 {
1063         cs_stop(sc);
1064         cs_init(sc);
1065 }
1066
1067 static void
1068 cs_setmode(struct cs_softc *sc)
1069 {
1070         struct ifnet *ifp = &(sc->arpcom.ac_if);
1071         int rx_ctl;
1072
1073         /* Stop the receiver while changing filters */
1074         cs_writereg(sc->nic_addr, PP_LineCTL,
1075                         cs_readreg(sc->nic_addr, PP_LineCTL) & ~SERIAL_RX_ON);
1076
1077         if (ifp->if_flags & IFF_PROMISC) {
1078                 /* Turn on promiscuous mode. */
1079                 rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
1080         } else {
1081                 if (ifp->if_flags & IFF_MULTICAST) {
1082                         /* Allow receiving frames with multicast addresses */
1083                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1084                                  RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
1085                         /*
1086                          * Here the reconfiguration of chip's multicast
1087                          * filters should be done but I've no idea about
1088                          * hash transformation in this chip. If you can
1089                          * add this code or describe me the transformation
1090                          * I'd be very glad.
1091                          */
1092                 } else {
1093                         /*
1094                          * Receive only good frames addressed for us and
1095                          * good broadcasts.
1096                          */
1097                         rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
1098                                  RX_OK_ACCEPT;
1099                 }
1100         }
1101
1102         /* Set up the filter */
1103         cs_writereg(sc->nic_addr, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
1104
1105         /* Turn on receiver */
1106         cs_writereg(sc->nic_addr, PP_LineCTL,
1107                         cs_readreg(sc->nic_addr, PP_LineCTL) | SERIAL_RX_ON);
1108 }
1109
1110 static int
1111 cs_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1112 {
1113         struct cs_softc *sc=ifp->if_softc;
1114         struct ifreq *ifr = (struct ifreq *)data;
1115         int error=0;
1116
1117 #ifdef CS_DEBUG
1118         if_printf(ifp, "ioctl(%lx)\n", command);
1119 #endif
1120
1121         switch (command) {
1122         case SIOCSIFFLAGS:
1123                 /*
1124                  * Switch interface state between "running" and
1125                  * "stopped", reflecting the UP flag.
1126                  */
1127                 if (sc->arpcom.ac_if.if_flags & IFF_UP) {
1128                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
1129                                 cs_init(sc);
1130                         }
1131                 } else {
1132                         if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
1133                                 cs_stop(sc);
1134                         }
1135                 }
1136                 /*
1137                  * Promiscuous and/or multicast flags may have changed,
1138                  * so reprogram the multicast filter and/or receive mode.
1139                  *
1140                  * See note about multicasts in cs_setmode
1141                  */
1142                 cs_setmode(sc);
1143                 break;
1144
1145         case SIOCADDMULTI:
1146         case SIOCDELMULTI:
1147             /*
1148              * Multicast list has changed; set the hardware filter
1149              * accordingly.
1150              *
1151              * See note about multicasts in cs_setmode
1152              */
1153             cs_setmode(sc);
1154             error = 0;
1155             break;
1156
1157         case SIOCSIFMEDIA:
1158         case SIOCGIFMEDIA:
1159                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1160                 break;
1161         default:
1162                 error = ether_ioctl(ifp, command, data);
1163                 break;
1164         }
1165
1166         return error;
1167 }
1168
1169 /*
1170  * Device timeout/watchdog routine. Entered if the device neglects to
1171  * generate an interrupt after a transmit has been started on it.
1172  */
1173 static void
1174 cs_watchdog(struct ifnet *ifp)
1175 {
1176         struct cs_softc *sc = ifp->if_softc;
1177
1178         ifp->if_oerrors++;
1179         log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
1180
1181         /* Reset the interface */
1182         if (ifp->if_flags & IFF_UP)
1183                 cs_reset(sc);
1184         else
1185                 cs_stop(sc);
1186 }
1187
1188 static int
1189 cs_mediachange(struct ifnet *ifp)
1190 {
1191         struct cs_softc *sc = ifp->if_softc;
1192         struct ifmedia *ifm = &sc->media;
1193
1194         if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1195                 return EINVAL;
1196
1197         return cs_mediaset(sc, ifm->ifm_media);
1198 }
1199
1200 static void
1201 cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
1202 {
1203         int line_status;
1204         struct cs_softc *sc = ifp->if_softc;
1205
1206         ifmr->ifm_active = IFM_ETHER;
1207         line_status = cs_readreg(sc->nic_addr, PP_LineST);
1208         if (line_status & TENBASET_ON) {
1209                 ifmr->ifm_active |= IFM_10_T;
1210                 if (sc->chip_type != CS8900) {
1211                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & FDX_ACTIVE)
1212                                 ifmr->ifm_active |= IFM_FDX;
1213                         if (cs_readreg(sc->nic_addr, PP_AutoNegST) & HDX_ACTIVE)
1214                                 ifmr->ifm_active |= IFM_HDX;
1215                 }
1216                 ifmr->ifm_status = IFM_AVALID;
1217                 if (line_status & LINK_OK)
1218                         ifmr->ifm_status |= IFM_ACTIVE;
1219         } else {
1220                 if (line_status & AUI_ON) {
1221                         cs_writereg(sc->nic_addr, PP_SelfCTL,
1222                                     cs_readreg(sc->nic_addr, PP_SelfCTL) |
1223                                     HCB1_ENBL);
1224                         if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
1225                             (cs_readreg(sc->nic_addr, PP_SelfCTL)&HCB1))
1226                                 ifmr->ifm_active |= IFM_10_2;
1227                         else
1228                                 ifmr->ifm_active |= IFM_10_5;
1229                 }
1230         }
1231 }
1232
1233 static int
1234 cs_mediaset(struct cs_softc *sc, int media)
1235 {
1236         int error;
1237
1238         /* Stop the receiver & transmitter */
1239         cs_writereg(sc->nic_addr, PP_LineCTL,
1240                     cs_readreg(sc->nic_addr, PP_LineCTL) &
1241                     ~(SERIAL_RX_ON | SERIAL_TX_ON));
1242
1243 #ifdef CS_DEBUG
1244         if_printf(&sc->arpcom.ac_if, "cs_setmedia(%x)\n", media);
1245 #endif
1246
1247         switch (IFM_SUBTYPE(media)) {
1248         default:
1249         case IFM_AUTO:
1250                 if ((error=enable_tp(sc))==0)
1251                         error = cs_duplex_auto(sc);
1252                 else if ((error=enable_bnc(sc)) != 0)
1253                         error = enable_aui(sc);
1254                 break;
1255         case IFM_10_T:
1256                 if ((error=enable_tp(sc)) != 0)
1257                         break;
1258                 if (media & IFM_FDX)
1259                         cs_duplex_full(sc);
1260                 else if (media & IFM_HDX)
1261                         cs_duplex_half(sc);
1262                 else
1263                         error = cs_duplex_auto(sc);
1264                 break;
1265         case IFM_10_2:
1266                 error = enable_bnc(sc);
1267                 break;
1268         case IFM_10_5:
1269                 error = enable_aui(sc);
1270                 break;
1271         }
1272
1273         /*
1274          * Turn the transmitter & receiver back on
1275          */
1276         cs_writereg(sc->nic_addr, PP_LineCTL,
1277                     cs_readreg( sc->nic_addr, PP_LineCTL ) |
1278                     SERIAL_RX_ON | SERIAL_TX_ON);
1279
1280         return error;
1281 }