drivers/net/sdla.c

/* */
This source file includes following definitions.
sdla_read
sdla_write
sdla_clear
sdla_byte
sdla_stop
sdla_start
sdla_z80_poll
sdla_cpuspeed
sdla_errors
sdla_cmd
sdla_activate
sdla_deactivate
sdla_assoc
sdla_deassoc
sdla_dlci_conf
sdla_transmit
sdla_receive
sdla_isr
sdla_poll
sdla_close
sdla_open
sdla_config
sdla_xfer
sdla_reconfig
sdla_ioctl
sdla_change_mtu
sdla_set_config
sdla_stats
sdla_init
sdla_setup
init_module
cleanup_module
   1 /*
   2  * SDLA         An implementation of a driver for the Sangoma S502/S508 series
   3  *              multi-protocol PC interface card.  Initial offering is with 
   4  *              the DLCI driver, providing Frame Relay support for linux.
   5  *
   6  *              Global definitions for the Frame relay interface.
   7  *
   8  * Version:     @(#)sdla.c   0.20       13 Apr 1996
   9  *
  10  * Credits:     Sangoma Technologies, for the use of 2 cards for an extended
  11  *                      period of time.
  12  *              David Mandelstam <dm@sangoma.com> for getting me started on 
  13  *                      this project, and incentive to complete it.
  14  *              Gene Kozen <74604.152@compuserve.com> for providing me with
  15  *                      important information about the cards.
  16  *
  17  * Author:      Mike McLagan <mike.mclagan@linux.org>
  18  *
  19  * Changes:
  20  *              0.15    Mike McLagan    Improved error handling, packet dropping
  21  *              0.20    Mike McLagan    New transmit/receive flags for config
  22  *                                      If in FR mode, don't accept packets from
  23  *                                      non-DLCI devices.
  24  *
  25  *
  26  *              This program is free software; you can redistribute it and/or
  27  *              modify it under the terms of the GNU General Public License
  28  *              as published by the Free Software Foundation; either version
  29  *              2 of the License, or (at your option) any later version.
  30  */
  31 
  32 #include <linux/module.h>
  33 
  34 #include <linux/kernel.h>
  35 #include <linux/sched.h>
  36 #include <linux/types.h>
  37 #include <linux/fcntl.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/ptrace.h>
  40 #include <linux/ioport.h>
  41 #include <linux/in.h>
  42 #include <linux/malloc.h>
  43 #include <linux/string.h>
  44 #include <linux/timer.h>
  45 #include <linux/errno.h>
  46 
  47 #include <asm/system.h>
  48 #include <asm/bitops.h>
  49 #include <asm/io.h>
  50 #include <asm/dma.h>
  51 
  52 #include <linux/netdevice.h>
  53 #include <linux/skbuff.h>
  54 #include <linux/if_arp.h>
  55 #include <linux/if_frad.h>
  56 
  57 #include <linux/sdla.h>
  58 
  59 static const char* version = "SDLA driver v0.20, 13 Apr 1996, mike.mclagan@linux.org";
  60 
  61 static const char* devname = "sdla";
  62 
  63 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
  64 
  65 static unsigned int valid_mem[]  = {0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000, 
  66                                     0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
  67                                     0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
  68                                     0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
  69                                     0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000}; 
  70 
  71 /*********************************************************
  72  *
  73  * these are the core routines that access the card itself 
  74  *
  75  *********************************************************/
  76 
  77 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
  78 
  79 static void sdla_read(struct device *dev, int addr, void *buf, short len)
     /*  */
  80 {
  81    unsigned long flags;
  82    char          *temp, *base;
  83    int           offset, bytes;
  84 
  85    temp = buf;
  86    while(len)
  87    {
  88       offset = addr & SDLA_ADDR_MASK;
  89       bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
  90       base = (void *) (dev->mem_start + offset);
  91 
  92       save_flags(flags);
  93       cli();
  94       SDLA_WINDOW(dev, addr);
  95       memcpy(temp, base, bytes);
  96       restore_flags(flags);
  97 
  98       addr += bytes;
  99       temp += bytes;
 100       len  -= bytes;
 101    }  
 102 }
 103 
 104 static void sdla_write(struct device *dev, int addr, void *buf, short len)
     /*  */
 105 {
 106    unsigned long flags;
 107    char          *temp, *base;
 108    int           offset, bytes;
 109 
 110    temp = buf;
 111    while(len)
 112    {
 113       offset = addr & SDLA_ADDR_MASK;
 114       bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
 115       base = (void *) (dev->mem_start + offset);
 116 
 117       save_flags(flags);
 118       cli();
 119       SDLA_WINDOW(dev, addr);
 120       memcpy(base, temp, bytes);
 121       restore_flags(flags);
 122 
 123       addr += bytes;
 124       temp += bytes;
 125       len  -= bytes;
 126    }
 127 }
 128 
 129 static void sdla_clear(struct device *dev)
     /*  */
 130 {
 131    unsigned long flags;
 132    char          *base;
 133    int           len, addr, bytes;
 134 
 135    len = 65536;
 136    addr = 0;
 137    bytes = SDLA_WINDOW_SIZE;
 138    base = (void *) dev->mem_start;
 139 
 140    save_flags(flags);
 141    cli();
 142    while(len)
 143    {
 144       SDLA_WINDOW(dev, addr);
 145       memset(base, 0, bytes);
 146 
 147       addr += bytes;
 148       len  -= bytes;
 149    }
 150    restore_flags(flags);
 151 }
 152 
 153 static char sdla_byte(struct device *dev, int addr)
     /*  */
 154 {
 155    unsigned long flags;
 156    char          byte, *temp;
 157 
 158    temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
 159 
 160    save_flags(flags);
 161    cli();
 162    SDLA_WINDOW(dev, addr);
 163    byte = *temp;
 164    restore_flags(flags);
 165 
 166    return(byte);
 167 }
 168 
 169 void sdla_stop(struct device *dev)
     /*  */
 170 {
 171    struct frad_local *flp;
 172 
 173    flp = dev->priv;
 174    switch(flp->type)
 175    {
 176       case SDLA_S502A:
 177          outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
 178          flp->state = SDLA_HALT;
 179          break;
 180       case SDLA_S502E:
 181          outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
 182          outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
 183          flp->state = SDLA_S502E_ENABLE;
 184          break;
 185       case SDLA_S507:
 186          flp->state &= ~SDLA_CPUEN;
 187          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 188          break;
 189       case SDLA_S508:
 190          flp->state &= ~SDLA_CPUEN;
 191          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 192          break;
 193    }
 194 }
 195 
 196 void sdla_start(struct device *dev)
     /*  */
 197 {
 198    struct frad_local *flp;
 199 
 200    flp = dev->priv;
 201    switch(flp->type)
 202    {
 203       case SDLA_S502A:
 204          outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
 205          outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
 206          flp->state = SDLA_S502A_START;
 207          break;
 208       case SDLA_S502E:
 209          outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
 210          outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
 211          flp->state = 0;
 212          break;
 213       case SDLA_S507:
 214          flp->state |= SDLA_CPUEN;
 215          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 216          break;
 217       case SDLA_S508:
 218          flp->state |= SDLA_CPUEN;
 219          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 220          break;
 221    }
 222 }
 223 
 224 /****************************************************
 225  *
 226  * this is used for the S502A/E cards to determine
 227  * the speed of the onboard CPU.  Calibration is
 228  * necessary for the Frame Relay code uploaded 
 229  * later.  Incorrect results cause timing problems
 230  * with link checks & status messages
 231  *
 232  ***************************************************/
 233 
 234 int sdla_z80_poll(struct device *dev, int z80_addr, int jiffs, char resp1, char resp2)
     /*  */
 235 {
 236    unsigned long start, done, now;
 237    char          resp, *temp;
 238 
 239    start = now = jiffies;
 240    done = jiffies + jiffs;
 241 
 242    temp = (void *)dev->mem_start;
 243    temp += z80_addr & SDLA_ADDR_MASK;
 244 
 245    resp = ~resp1;
 246    while ((jiffies < done) && (resp != resp1) && (!resp2 || (resp != resp2)))
 247    {
 248       if (jiffies != now)
 249       {
 250          SDLA_WINDOW(dev, z80_addr);
 251          now = jiffies;
 252          resp = *temp;
 253       }
 254    }
 255    return(jiffies < done ? jiffies - start : -1);
 256 }
 257 
 258 /* constants for Z80 CPU speed */
 259 #define Z80_READY               '1'     /* Z80 is ready to begin */
 260 #define LOADER_READY            '2'     /* driver is ready to begin */
 261 #define Z80_SCC_OK              '3'     /* SCC is on board */
 262 #define Z80_SCC_BAD             '4'     /* SCC was not found */
 263 
 264 static int sdla_cpuspeed(struct device *dev, struct ifreq *ifr)
     /*  */
 265 {
 266    int  jiffs;
 267    char data;
 268 
 269    sdla_start(dev);
 270    if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
 271       return(-EIO);
 272 
 273    data = LOADER_READY;
 274    sdla_write(dev, 0, &data, 1);
 275 
 276    if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
 277       return(-EIO);
 278 
 279    sdla_stop(dev);
 280    sdla_read(dev, 0, &data, 1);
 281 
 282    if (data == Z80_SCC_BAD)
 283       return(-EIO);
 284 
 285    if (data != Z80_SCC_OK)
 286       return(-EINVAL);
 287 
 288    if (jiffs < 165)
 289       ifr->ifr_mtu = SDLA_CPU_16M;
 290    else
 291       if (jiffs < 220)
 292          ifr->ifr_mtu = SDLA_CPU_10M;
 293       else
 294          if (jiffs < 258)
 295             ifr->ifr_mtu = SDLA_CPU_8M;
 296          else
 297             if (jiffs < 357)
 298                ifr->ifr_mtu = SDLA_CPU_7M;
 299             else
 300                if (jiffs < 467)
 301                   ifr->ifr_mtu = SDLA_CPU_5M;
 302                else
 303                   ifr->ifr_mtu = SDLA_CPU_3M;
 304  
 305    return(0);
 306 }
 307 
 308 /************************************************
 309  *
 310  *  Direct interaction with the Frame Relay code 
 311  *  starts here.
 312  *
 313  ************************************************/
 314 
 315 struct _dlci_stat {
 316    short dlci           __attribute__((packed));
 317    char  flags          __attribute__((packed));
 318 };
 319 
 320 struct _frad_stat {
 321    char    flags;
 322    struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 323 };
 324 
 325 static void sdla_errors(struct device *dev, int cmd, int dlci, int ret, int len, void *data) 
     /*  */
 326 {
 327    struct _dlci_stat *pstatus;
 328    short             *pdlci;
 329    int               i;
 330    char              *state;
 331 
 332    switch (ret)
 333    {
 334       case SDLA_RET_MODEM:
 335          state = data;
 336          if (*state & SDLA_MODEM_DCD_LOW)
 337             printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
 338          if (*state & SDLA_MODEM_CTS_LOW)
 339             printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
 340 /* I should probably do something about this! */
 341          break;
 342 
 343       case SDLA_RET_CHANNEL_OFF:
 344          printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
 345 /* same here */
 346          break;
 347 
 348       case SDLA_RET_CHANNEL_ON:
 349          printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
 350 /* same here */
 351          break;
 352 
 353       case SDLA_RET_DLCI_STATUS:
 354          printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
 355          len /= sizeof(struct _dlci_stat);
 356          for(pstatus = data, i=0;i < len;i++,pstatus++)
 357          {
 358             if (pstatus->flags & SDLA_DLCI_NEW)
 359                state = "new";
 360             else
 361                if (pstatus->flags & SDLA_DLCI_DELETED)
 362                   state = "deleted";
 363                else
 364                   if (pstatus->flags & SDLA_DLCI_ACTIVE)
 365                      state = "active";
 366                   else
 367                      state = "unknown status";
 368  
 369             printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
 370 /* same here */
 371          }
 372          break;
 373 
 374       case SDLA_RET_DLCI_UNKNOWN:
 375          printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
 376          len /= sizeof(short);
 377          for(pdlci = data,i=0;i < len;i++,pdlci++)
 378             printk(" %i", *pdlci);
 379          printk("\n");
 380          break;
 381 
 382       case SDLA_RET_TIMEOUT:
 383          printk(KERN_ERR "%s: Command timed out!\n", dev->name);
 384          break;
 385 
 386       case SDLA_RET_BUF_OVERSIZE:
 387          printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
 388          break;
 389 
 390       case SDLA_RET_BUF_TOO_BIG:
 391          printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
 392          break;
 393 
 394       case SDLA_RET_CHANNEL_INACTIVE:
 395       case SDLA_RET_DLCI_INACTIVE:
 396       case SDLA_RET_CIR_OVERFLOW:
 397       case SDLA_RET_NO_BUFS:
 398          if (cmd == SDLA_INFORMATION_WRITE)
 399             break;
 400 
 401       default: 
 402          printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
 403 /* Further processing could be done here */
 404          break;
 405    }
 406 }
 407 
 408 static int sdla_cmd(struct device *dev, int cmd, short dlci, short flags, 
     /*  */
 409                         void *inbuf, short inlen, void *outbuf, short *outlen)
 410 {
 411    static struct _frad_stat status;
 412    struct frad_local        *flp;
 413    struct sdla_cmd          *cmd_buf;
 414    unsigned long            pflags;
 415    int                      jiffs, ret, waiting, len;
 416    long                     window;
 417 
 418    flp = dev->priv;
 419 
 420    window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
 421    cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
 422    ret = 0;
 423    jiffs = jiffies + HZ;  /* 1 second is plenty */
 424    save_flags(pflags);
 425    cli();
 426    SDLA_WINDOW(dev, window);
 427    cmd_buf->cmd = cmd;
 428    cmd_buf->dlci = dlci;
 429    cmd_buf->flags = flags;
 430 
 431    if (inbuf)
 432       memcpy(cmd_buf->data, inbuf, inlen);
 433 
 434    cmd_buf->length = inlen;
 435 
 436    cmd_buf->opp_flag = 1;
 437    restore_flags(pflags);
 438 
 439    waiting = 1;
 440    len = 0;
 441    while (waiting && (jiffies <= jiffs))
 442    {
 443       if (waiting++ % 3) 
 444       {
 445          save_flags(pflags);
 446          cli();
 447          SDLA_WINDOW(dev, window);
 448          waiting = ((volatile)(cmd_buf->opp_flag));
 449          restore_flags(pflags);
 450       }
 451    }
 452    
 453    if (!waiting)
 454    {
 455       save_flags(pflags);
 456       cli();
 457       SDLA_WINDOW(dev, window);
 458       ret = cmd_buf->retval;
 459       len = cmd_buf->length;
 460       if (outbuf && outlen)
 461       {
 462          *outlen = *outlen >= len ? len : *outlen;
 463 
 464          if (*outlen)
 465             memcpy(outbuf, cmd_buf->data, *outlen);
 466       }
 467 
 468       /* This is a local copy that's used for error handling */
 469       if (ret)
 470          memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
 471 
 472       restore_flags(pflags);
 473    }
 474    else
 475       ret = SDLA_RET_TIMEOUT;
 476 
 477    if (ret != SDLA_RET_OK)
 478       sdla_errors(dev, cmd, dlci, ret, len, &status);
 479 
 480    return(ret);
 481 }
 482 
 483 /***********************************************
 484  *
 485  * these functions are called by the DLCI driver 
 486  *
 487  ***********************************************/
 488 
 489 static int sdla_reconfig(struct device *dev);
 490 
 491 int sdla_activate(struct device *slave, struct device *master)
     /*  */
 492 {
 493    struct frad_local *flp;
 494    int               i;
 495 
 496    flp = slave->priv;
 497 
 498    for(i=0;i<CONFIG_DLCI_MAX;i++)
 499       if (flp->master[i] == master)
 500          break;
 501 
 502    if (i == CONFIG_DLCI_MAX)
 503       return(-ENODEV);
 504 
 505    flp->dlci[i] = abs(flp->dlci[i]);
 506 
 507    if (slave->start && (flp->config.station == FRAD_STATION_NODE))
 508       sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 509 
 510    return(0);
 511 }
 512 
 513 int sdla_deactivate(struct device *slave, struct device *master)
     /*  */
 514 {
 515    struct frad_local *flp;
 516    int               i;
 517 
 518    flp = slave->priv;
 519 
 520    for(i=0;i<CONFIG_DLCI_MAX;i++)
 521       if (flp->master[i] == master)
 522          break;
 523 
 524    if (i == CONFIG_DLCI_MAX)
 525       return(-ENODEV);
 526 
 527    flp->dlci[i] = -abs(flp->dlci[i]);
 528 
 529    if (slave->start && (flp->config.station == FRAD_STATION_NODE))
 530       sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 531 
 532    return(0);
 533 }
 534 
 535 int sdla_assoc(struct device *slave, struct device *master)
     /*  */
 536 {
 537    struct frad_local *flp;
 538    int               i;
 539 
 540    if (master->type != ARPHRD_DLCI)
 541       return(-EINVAL);
 542 
 543    flp = slave->priv;
 544 
 545    for(i=0;i<CONFIG_DLCI_MAX;i++)
 546    {
 547       if (!flp->master[i])
 548          break;
 549       if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
 550          return(-EADDRINUSE);
 551    } 
 552 
 553    if (i == CONFIG_DLCI_MAX)
 554       return(-EMLINK);  /* #### Alan: Comments on this ?? */
 555 
 556    MOD_INC_USE_COUNT;
 557 
 558    flp->master[i] = master;
 559    flp->dlci[i] = -*(short *)(master->dev_addr);
 560    master->mtu = slave->mtu;
 561 
 562    if (slave->start)
 563       if (flp->config.station == FRAD_STATION_CPE)
 564          sdla_reconfig(slave);
 565       else
 566          sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 567 
 568    return(0);
 569 }
 570 
 571 int sdla_deassoc(struct device *slave, struct device *master)
     /*  */
 572 {
 573    struct frad_local *flp;
 574    int               i;
 575 
 576    flp = slave->priv;
 577 
 578    for(i=0;i<CONFIG_DLCI_MAX;i++)
 579       if (flp->master[i] == master)
 580          break;
 581 
 582    if (i == CONFIG_DLCI_MAX)
 583       return(-ENODEV);
 584 
 585    flp->master[i] = NULL;
 586    flp->dlci[i] = 0;
 587 
 588    MOD_DEC_USE_COUNT;
 589 
 590    if (slave->start)
 591       if (flp->config.station == FRAD_STATION_CPE)
 592          sdla_reconfig(slave);
 593       else
 594          sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 595 
 596    return(0);
 597 }
 598 
 599 int sdla_dlci_conf(struct device *slave, struct device *master, int get)
     /*  */
 600 {
 601    struct frad_local *flp;
 602    struct frad_local *dlp;
 603    int               i;
 604    short             len, ret;
 605 
 606    flp = slave->priv;
 607 
 608    for(i=0;i<CONFIG_DLCI_MAX;i++)
 609       if (flp->master[i] == master)
 610          break;
 611 
 612    if (i == CONFIG_DLCI_MAX)
 613       return(-ENODEV);
 614 
 615    dlp = master->priv;
 616 
 617    ret = SDLA_RET_OK;
 618    len = sizeof(struct dlci_conf);
 619    if (slave->start)
 620       if (get)
 621          ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
 622                      NULL, 0, &dlp->config, &len);
 623       else
 624          ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
 625                      &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
 626 
 627    return(ret == SDLA_RET_OK ? 0 : -EIO);
 628 }
 629 
 630 /**************************
 631  *
 632  * now for the Linux driver 
 633  *
 634  **************************/
 635 
 636 /* NOTE: the DLCI driver deals with freeing the SKB!! */
 637 static int sdla_transmit(struct sk_buff *skb, struct device *dev)
     /*  */
 638 {
 639    struct frad_local *flp;
 640    int               ret, addr;
 641    short             size;
 642    unsigned long     flags;
 643    struct buf_entry  *pbuf;
 644 
 645    flp = dev->priv;
 646    ret = 0;
 647 
 648    if (dev->tbusy) 
 649       return(1);
 650 
 651    if (skb == NULL) 
 652       return(0);
 653 
 654    if (set_bit(0, (void*)&dev->tbusy) != 0)
 655       printk(KERN_WARNING "%s: transmitter access conflict.\n", dev->name);
 656    else
 657    {
 658  
 659       /*
 660        * stupid GateD insists on setting up the multicast router thru us
 661        * and we're ill equipped to handle a non Frame Relay packet at this
 662        * time!
 663        */
 664 
 665       switch (dev->type)
 666       {
 667          case ARPHRD_FRAD:
 668             if (skb->dev->type != ARPHRD_DLCI)
 669             {
 670                printk(KERN_WARNING "%s: FRAD module accepts packets from DLCI ONLY!\n", dev->name);
 671                dev_kfree_skb(skb, FREE_WRITE);
 672                return(0);
 673             }
 674             break;
 675 
 676          default:
 677             printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
 678             dev_kfree_skb(skb, FREE_WRITE);
 679             return(0);
 680       }
 681 
 682       /* this is frame specific, but till there's a PPP module, it's the default */
 683       switch (flp->type)
 684       {
 685          case SDLA_S502A:
 686          case SDLA_S502E:
 687             ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 688             break;
 689 
 690          case SDLA_S508:
 691             size = sizeof(addr);
 692             ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 693             if (ret == SDLA_RET_OK)
 694             {
 695                save_flags(flags); 
 696                cli();
 697                SDLA_WINDOW(dev, addr);
 698                pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 699 
 700                sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 701 
 702                SDLA_WINDOW(dev, addr);
 703                pbuf->opp_flag = 1;
 704                restore_flags(flags);
 705             }
 706             break;
 707       }
 708  
 709       switch (ret)
 710       {
 711          case SDLA_RET_OK:
 712             flp->stats.tx_packets++;
 713             ret = DLCI_RET_OK;
 714             break;
 715  
 716          case SDLA_RET_CIR_OVERFLOW:
 717          case SDLA_RET_BUF_OVERSIZE:
 718          case SDLA_RET_NO_BUFS:
 719             flp->stats.tx_dropped++;
 720             ret = DLCI_RET_DROP;
 721             break;
 722 
 723          default:
 724             flp->stats.tx_errors++;
 725             ret = DLCI_RET_ERR;
 726             break;
 727       }
 728       dev->tbusy = 0;
 729    }
 730    return(ret);
 731 }
 732 
 733 static void sdla_receive(struct device *dev)
     /*  */
 734 {
 735    struct device     *master;
 736    struct frad_local *flp;
 737    struct dlci_local *dlp;
 738    struct sk_buff    *skb;
 739 
 740    struct sdla_cmd   *cmd;
 741    struct buf_info   *pbufi;
 742    struct buf_entry  *pbuf;
 743 
 744    unsigned long     flags;
 745    int               i, received, success, addr, buf_base, buf_top;
 746    short             dlci, len, len2, split;
 747 
 748    flp = dev->priv;
 749    success = 1;
 750    received = addr = buf_top = buf_base = 0;
 751    len = dlci = 0;
 752    skb = NULL;
 753    master = NULL;
 754    cmd = NULL;
 755    pbufi = NULL;
 756    pbuf = NULL;
 757 
 758    save_flags(flags);
 759    cli();
 760 
 761    switch (flp->type)
 762    {
 763       case SDLA_S502A:
 764       case SDLA_S502E:
 765          cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 766          SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 767          success = cmd->opp_flag;
 768          if (!success)
 769             break;
 770 
 771          dlci = cmd->dlci;
 772          len = cmd->length;
 773          break;
 774 
 775       case SDLA_S508:
 776          pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 777          SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 778          pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 779          success = pbuf->opp_flag;
 780          if (!success)
 781             break;
 782 
 783          buf_top = pbufi->buf_top;
 784          buf_base = pbufi->buf_base;
 785          dlci = pbuf->dlci;
 786          len = pbuf->length;
 787          addr = pbuf->buf_addr;
 788          break;
 789    }
 790 
 791    /* common code, find the DLCI and get the SKB */
 792    if (success)
 793    {
 794       for (i=0;i<CONFIG_DLCI_MAX;i++)
 795          if (flp->dlci[i] == dlci)
 796             break;
 797 
 798       if (i == CONFIG_DLCI_MAX)
 799       {
 800          printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
 801          flp->stats.rx_errors++;
 802          success = 0;
 803       }
 804    }
 805 
 806    if (success)
 807    {
 808       master = flp->master[i];
 809       skb = dev_alloc_skb(len + sizeof(struct frhdr));
 810       if (skb == NULL) 
 811       {
 812          printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 813          flp->stats.rx_dropped++; 
 814          success = 0;
 815       }
 816       else
 817          skb_reserve(skb, sizeof(struct frhdr));
 818    }
 819 
 820    /* pick up the data */
 821    switch (flp->type)
 822    {
 823       case SDLA_S502A:
 824       case SDLA_S502E:
 825          if (success)
 826             sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 827 
 828          SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 829          cmd->opp_flag = 0;
 830          break;
 831 
 832       case SDLA_S508:
 833          if (success)
 834          {
 835             /* is this buffer split off the end of the internal ring buffer */
 836             split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 837             len2 = len - split;
 838 
 839             sdla_read(dev, addr, skb_put(skb, len2), len2);
 840             if (split)
 841                sdla_read(dev, buf_base, skb_put(skb, split), split);
 842          }
 843 
 844          /* increment the buffer we're looking at */
 845          SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 846          flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 847          pbuf->opp_flag = 0;
 848          break;
 849    }
 850 
 851    if (success)
 852    {
 853       flp->stats.rx_packets++;
 854       dlp = master->priv;
 855       (*dlp->receive)(skb, master);
 856    }
 857 
 858    restore_flags(flags);
 859 }
 860 
 861 static void sdla_isr(int irq, void *dev_id, struct pt_regs * regs)
     /*  */
 862 {
 863    struct device     *dev;
 864    struct frad_local *flp;
 865    char              byte;
 866 
 867    dev = irq2dev_map[irq];
 868 
 869    if (dev == NULL)
 870    {
 871       printk(KERN_WARNING "sdla_isr(): irq %d for unknown device.\n", irq);
 872       return;
 873    }
 874 
 875    flp = dev->priv;
 876 
 877    if (!flp->initialized)
 878    {
 879       printk(KERN_WARNING "%s: irq %d for uninitialized device.\n", dev->name, irq);
 880       return;
 881    }
 882 
 883    dev->interrupt = 1;
 884    byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 885    switch (byte)
 886    {
 887       case SDLA_INTR_RX:
 888          sdla_receive(dev);
 889          break;
 890 
 891       /* the command will get an error return, which is processed above */
 892       case SDLA_INTR_MODEM:
 893       case SDLA_INTR_STATUS:
 894          sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 895          break;
 896 
 897       case SDLA_INTR_TX:
 898       case SDLA_INTR_COMPLETE:
 899       case SDLA_INTR_TIMER:
 900          printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
 901          break;
 902    }
 903 
 904    /* the S502E requires a manual acknowledgement of the interrupt */ 
 905    if (flp->type == SDLA_S502E)
 906    {
 907       flp->state &= ~SDLA_S502E_INTACK;
 908       outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 909       flp->state |= SDLA_S502E_INTACK;
 910       outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 911    }
 912 
 913    /* this clears the byte, informing the Z80 we're done */
 914    byte = 0;
 915    sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 916    dev->interrupt = 0;
 917 }
 918 
 919 static void sdla_poll(unsigned long device)
     /*  */
 920 {
 921    struct device     *dev;
 922    struct frad_local *flp;
 923 
 924    dev = (struct device *) device;
 925    flp = dev->priv;
 926 
 927    if (sdla_byte(dev, SDLA_502_RCV_BUF))
 928       sdla_receive(dev);
 929 
 930    flp->timer.expires = 1;
 931    add_timer(&flp->timer);
 932 }
 933 
 934 static int sdla_close(struct device *dev)
     /*  */
 935 {
 936    struct frad_local *flp;
 937    struct intr_info  intr;
 938    int               len, i;
 939    short             dlcis[CONFIG_DLCI_MAX];
 940 
 941    flp = dev->priv;
 942 
 943    len = 0;
 944    for(i=0;i<CONFIG_DLCI_MAX;i++)
 945       if (flp->dlci[i])
 946          dlcis[len++] = abs(flp->dlci[i]);
 947    len *= 2;
 948 
 949    if (flp->config.station == FRAD_STATION_NODE)
 950    {
 951       for(i=0;i<CONFIG_DLCI_MAX;i++)
 952          if (flp->dlci[i] > 0) 
 953             sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 954       sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 955    }
 956 
 957    memset(&intr, 0, sizeof(intr));
 958    /* let's start up the reception */
 959    switch(flp->type)
 960    {
 961       case SDLA_S502A:
 962          del_timer(&flp->timer); 
 963          break;
 964 
 965       case SDLA_S502E:
 966          sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 967          flp->state &= ~SDLA_S502E_INTACK;
 968          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 969          break;
 970 
 971       case SDLA_S507:
 972          break;
 973 
 974       case SDLA_S508:
 975          sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 976          flp->state &= ~SDLA_S508_INTEN;
 977          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 978          break;
 979    }
 980 
 981    sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 982 
 983    dev->tbusy = 1;
 984    dev->start = 0;
 985 
 986    MOD_DEC_USE_COUNT;
 987 
 988    return(0);
 989 }
 990 
 991 struct conf_data {
 992    struct frad_conf config;
 993    short            dlci[CONFIG_DLCI_MAX];
 994 };
 995 
 996 static int sdla_open(struct device *dev)
     /*  */
 997 {
 998    struct frad_local *flp;
 999    struct dlci_local *dlp;
1000    struct conf_data  data;
1001    struct intr_info  intr;
1002    int               len, i;
1003    char              byte;
1004 
1005    flp = dev->priv;
1006 
1007    if (!flp->initialized)
1008       return(-EPERM);
1009 
1010    if (!flp->configured)
1011       return(-EPERM);
1012 
1013    /* time to send in the configuration */
1014    len = 0;
1015    for(i=0;i<CONFIG_DLCI_MAX;i++)
1016       if (flp->dlci[i])
1017          data.dlci[len++] = abs(flp->dlci[i]);
1018    len *= 2;
1019 
1020    memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1021    len += sizeof(struct frad_conf);
1022 
1023    sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1024    sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1025 
1026    if (flp->type == SDLA_S508)
1027       flp->buffer = 0;
1028 
1029    sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1030 
1031    /* let's start up the reception */
1032    memset(&intr, 0, sizeof(intr));
1033    switch(flp->type)
1034    {
1035       case SDLA_S502A:
1036          flp->timer.expires = 1;
1037          add_timer(&flp->timer);
1038          break;
1039 
1040       case SDLA_S502E:
1041          flp->state |= SDLA_S502E_ENABLE;
1042          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1043          flp->state |= SDLA_S502E_INTACK;
1044          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1045          byte = 0;
1046          sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1047          intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1048          sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1049          break;
1050 
1051       case SDLA_S507:
1052          break;
1053 
1054       case SDLA_S508:
1055          flp->state |= SDLA_S508_INTEN;
1056          outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1057          byte = 0;
1058          sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1059          intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1060          intr.irq = dev->irq;
1061          sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1062          break;
1063    }
1064 
1065    if (flp->config.station == FRAD_STATION_CPE)
1066    {
1067       byte = SDLA_ICS_STATUS_ENQ;
1068       sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1069    }
1070    else
1071    {
1072       sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1073       for(i=0;i<CONFIG_DLCI_MAX;i++)
1074          if (flp->dlci[i] > 0)
1075             sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1076    }
1077 
1078    /* configure any specific DLCI settings */
1079    for(i=0;i<CONFIG_DLCI_MAX;i++)
1080       if (flp->dlci[i])
1081       {
1082          dlp = flp->master[i]->priv;
1083          if (dlp->configured)
1084             sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1085       }
1086 
1087    dev->tbusy = 0;
1088    dev->interrupt = 0;
1089    dev->start = 1;
1090 
1091    MOD_INC_USE_COUNT;
1092 
1093    return(0);
1094 }
1095 
1096 static int sdla_config(struct device *dev, struct frad_conf *conf, int get)
     /*  */
1097 {
1098    struct frad_local *flp;
1099    struct conf_data  data;
1100    int               i, err;
1101    short             size;
1102 
1103    if (dev->type == 0xFFFF)
1104       return(-EUNATCH);
1105 
1106    flp = dev->priv;
1107 
1108    if (!get)
1109    {
1110       if (dev->start)
1111          return(-EBUSY);
1112 
1113       err = verify_area(VERIFY_READ, conf, sizeof(struct frad_conf));
1114       if (err)
1115          return(err);
1116 
1117       memcpy_fromfs(&data.config, conf, sizeof(struct frad_conf));
1118 
1119       if (data.config.station & ~FRAD_STATION_NODE)
1120          return(-EINVAL);
1121 
1122       if (data.config.flags & ~FRAD_VALID_FLAGS)
1123          return(-EINVAL);
1124 
1125       if ((data.config.kbaud < 0) || 
1126           ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1127          return(-EINVAL);
1128 
1129       if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1130          return(-EINVAL);
1131 
1132       if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1133          return(-EINVAL);
1134 
1135       if ((data.config.T391 < 5) || (data.config.T391 > 30))
1136          return(-EINVAL);
1137 
1138       if ((data.config.T392 < 5) || (data.config.T392 > 30))
1139          return(-EINVAL);
1140 
1141       if ((data.config.N391 < 1) || (data.config.N391 > 255))
1142          return(-EINVAL);
1143 
1144       if ((data.config.N392 < 1) || (data.config.N392 > 10))
1145          return(-EINVAL);
1146 
1147       if ((data.config.N393 < 1) || (data.config.N393 > 10))
1148          return(-EINVAL);
1149 
1150       memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1151       flp->config.flags |= SDLA_DIRECT_RECV;
1152 
1153       if (flp->type == SDLA_S508)
1154          flp->config.flags |= SDLA_TX70_RX30;
1155 
1156       if (dev->mtu != flp->config.mtu)
1157       {
1158          /* this is required to change the MTU */
1159          dev->mtu = flp->config.mtu;
1160          for(i=0;i<CONFIG_DLCI_MAX;i++)
1161             if (flp->master[i])
1162                flp->master[i]->mtu = flp->config.mtu;
1163       }
1164 
1165       flp->config.mtu += sizeof(struct frhdr);
1166 
1167       /* off to the races! */
1168       if (!flp->configured)
1169          sdla_start(dev);
1170 
1171       flp->configured = 1;
1172    }
1173    else
1174    {
1175       err = verify_area(VERIFY_WRITE, conf, sizeof(struct frad_conf));
1176       if (err)
1177          return(err);
1178 
1179       /* no sense reading if the CPU isn't started */
1180       if (dev->start)
1181       {
1182          size = sizeof(data);
1183          if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1184             return(-EIO);
1185       }
1186       else
1187          if (flp->configured)
1188             memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1189          else
1190             memset(&data.config, 0, sizeof(struct frad_conf));
1191 
1192       memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1193       data.config.flags &= FRAD_VALID_FLAGS;
1194       data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1195       memcpy_tofs(conf, &data.config, sizeof(struct frad_conf));
1196    }
1197 
1198    return(0);
1199 }
1200 
1201 static int sdla_xfer(struct device *dev, struct sdla_mem *info, int read)
     /*  */
1202 {
1203    struct sdla_mem mem;
1204    int    err;
1205    char   *temp;
1206 
1207    err = verify_area(VERIFY_READ, info, sizeof(struct sdla_mem));
1208    if (err)
1209       return(err);
1210 
1211    memcpy_fromfs(&mem, info, sizeof(mem));
1212    if (read)
1213    {
1214       err = verify_area(VERIFY_WRITE, mem.data, mem.len);
1215       if (err)
1216          return(err);
1217 
1218       temp = kmalloc(mem.len, GFP_KERNEL);
1219       if (!temp)
1220          return(-ENOMEM);
1221       sdla_read(dev, mem.addr, temp, mem.len);
1222       memcpy_tofs(mem.data, temp, mem.len);
1223       kfree(temp);
1224    }
1225    else
1226    {
1227       err = verify_area(VERIFY_READ, mem.data, mem.len);
1228       if (err)
1229          return(err);
1230 
1231       temp = kmalloc(mem.len, GFP_KERNEL);
1232       if (!temp)
1233          return(-ENOMEM);
1234       memcpy_fromfs(temp, mem.data, mem.len);
1235       sdla_write(dev, mem.addr, temp, mem.len);
1236       kfree(temp);
1237    }
1238    return(0);
1239 }
1240 
1241 static int sdla_reconfig(struct device *dev)
     /*  */
1242 {
1243    struct frad_local *flp;
1244    struct conf_data  data;
1245    int               i, len;
1246 
1247    flp = dev->priv;
1248 
1249    len = 0;
1250    for(i=0;i<CONFIG_DLCI_MAX;i++)
1251       if (flp->dlci[i])
1252          data.dlci[len++] = flp->dlci[i];
1253    len *= 2;
1254 
1255    memcpy(&data, &flp->config, sizeof(struct frad_conf));
1256    len += sizeof(struct frad_conf);
1257 
1258    sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1259    sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1260    sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1261 
1262    return(0);
1263 }
1264 
1265 static int sdla_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
     /*  */
1266 {
1267    struct frad_local *flp;
1268 
1269    flp = dev->priv;
1270 
1271    if (!flp->initialized)
1272       return(-EPERM);
1273 
1274    switch (cmd)
1275    {
1276       case FRAD_GET_CONF:
1277       case FRAD_SET_CONF:
1278          return(sdla_config(dev, (struct frad_conf *)ifr->ifr_data, cmd == FRAD_GET_CONF));
1279 
1280       case SDLA_IDENTIFY:
1281          ifr->ifr_flags = flp->type;
1282          break;
1283 
1284       case SDLA_CPUSPEED:
1285          return(sdla_cpuspeed(dev, ifr)); 
1286 
1287 /* ==========================================================
1288 NOTE:  This is rather a useless action right now, as the
1289        current driver does not support protocols other than
1290        FR.  However, Sangoma has modules for a number of
1291        other protocols in the works.
1292 ============================================================*/
1293       case SDLA_PROTOCOL:
1294          if (flp->configured)
1295             return(-EALREADY);
1296 
1297          switch (ifr->ifr_flags)
1298          {
1299             case ARPHRD_FRAD:
1300                dev->type = ifr->ifr_flags;
1301                dev->family = AF_UNSPEC;
1302                break;
1303 
1304             default:
1305                return(-ENOPROTOOPT);
1306          }
1307          break;
1308 
1309       case SDLA_CLEARMEM:
1310          sdla_clear(dev);
1311          break;
1312 
1313       case SDLA_WRITEMEM:
1314       case SDLA_READMEM:
1315          return(sdla_xfer(dev, (struct sdla_mem *)ifr->ifr_data, cmd == SDLA_READMEM));
1316 
1317       case SDLA_START:
1318          sdla_start(dev);
1319          break;
1320 
1321       case SDLA_STOP:
1322          sdla_stop(dev);
1323          break;
1324 
1325       default:
1326          return(-EOPNOTSUPP);
1327    }
1328    return(0);
1329 }
1330 
1331 int sdla_change_mtu(struct device *dev, int new_mtu)
     /*  */
1332 {
1333    struct frad_local *flp;
1334 
1335    flp = dev->priv;
1336 
1337    if (dev->start)
1338       return(-EBUSY);
1339 
1340    /* for now, you can't change the MTU! */
1341    return(-EACCES);
1342 }
1343 
1344 int sdla_set_config(struct device *dev, struct ifmap *map)
     /*  */
1345 {
1346    struct frad_local *flp;
1347    int               i;
1348    char              byte;
1349 
1350    flp = dev->priv;
1351 
1352    if (flp->initialized)
1353       return(-EINVAL);
1354 
1355    for(i=0;i < sizeof(valid_port) / sizeof (int) ; i++)
1356       if (valid_port[i] == map->base_addr)
1357          break;   
1358 
1359    if (i == sizeof(valid_port) / sizeof(int))
1360       return(-EINVAL);
1361 
1362    dev->base_addr = map->base_addr;
1363    request_region(dev->base_addr, SDLA_IO_EXTENTS, dev->name);
1364 
1365    /* test for card types, S502A, S502E, S507, S508                 */
1366    /* these tests shut down the card completely, so clear the state */
1367    flp->type = SDLA_UNKNOWN;
1368    flp->state = 0;
1369    
1370    for(i=1;i<SDLA_IO_EXTENTS;i++)
1371       if (inb(dev->base_addr + i) != 0xFF)
1372         break;
1373 
1374    if (i == SDLA_IO_EXTENTS)
1375    {   
1376       outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
1377       if ((inb(dev->base_addr + SDLA_S502_STS) & 0x0F) == 0x08)
1378       {
1379          outb(SDLA_S502E_INTACK, dev->base_addr + SDLA_REG_CONTROL);
1380          if ((inb(dev->base_addr + SDLA_S502_STS) & 0x0F) == 0x0C)
1381          {
1382             outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL);
1383             flp->type = SDLA_S502E;
1384          }
1385       }
1386    }
1387 
1388    if (flp->type == SDLA_UNKNOWN)
1389    {
1390       for(byte=inb(dev->base_addr),i=0;i<SDLA_IO_EXTENTS;i++)
1391          if (inb(dev->base_addr + i) != byte)
1392             break;
1393 
1394       if (i == SDLA_IO_EXTENTS)
1395       {
1396          outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL);
1397          if ((inb(dev->base_addr + SDLA_S502_STS) & 0x7E) == 0x30)
1398          {
1399             outb(SDLA_S507_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
1400             if ((inb(dev->base_addr + SDLA_S502_STS) & 0x7E) == 0x32)
1401             {
1402                outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL);
1403                flp->type = SDLA_S507;
1404             }
1405          }
1406       }
1407    }
1408 
1409    if (flp->type == SDLA_UNKNOWN)
1410    {
1411       outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL);
1412       if ((inb(dev->base_addr + SDLA_S508_STS) & 0x3F) == 0x00)
1413       {
1414          outb(SDLA_S508_INTEN, dev->base_addr + SDLA_REG_CONTROL);
1415          if ((inb(dev->base_addr + SDLA_S508_STS) & 0x3F) == 0x10)
1416          {
1417             outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL);
1418             flp->type = SDLA_S508;
1419          }
1420       }
1421    }
1422 
1423    if (flp->type == SDLA_UNKNOWN)
1424    {
1425       outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
1426       if (inb(dev->base_addr + SDLA_S502_STS) == 0x40)
1427       {
1428          outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
1429          if (inb(dev->base_addr + SDLA_S502_STS) == 0x40)
1430          {
1431             outb(SDLA_S502A_INTEN, dev->base_addr + SDLA_REG_CONTROL);
1432             if (inb(dev->base_addr + SDLA_S502_STS) == 0x44)
1433             {
1434                outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
1435                flp->type = SDLA_S502A;
1436             }
1437          }
1438       }
1439    }
1440 
1441    if (flp->type == SDLA_UNKNOWN)
1442    {
1443       printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1444       return(-ENODEV);
1445    }
1446 
1447    switch(dev->base_addr)
1448    {
1449       case 0x270:
1450       case 0x280:
1451       case 0x380: 
1452       case 0x390:
1453          if ((flp->type != SDLA_S508) && (flp->type != SDLA_S507))
1454             return(-EINVAL);
1455    }
1456 
1457    switch (map->irq)
1458    {
1459       case 2:
1460          if (flp->type != SDLA_S502E)
1461             return(-EINVAL);
1462          break;
1463 
1464       case 10:
1465       case 11:
1466       case 12:
1467       case 15:
1468       case 4:
1469          if ((flp->type != SDLA_S508) && (flp->type != SDLA_S507))
1470             return(-EINVAL);
1471 
1472       case 3:
1473       case 5:
1474       case 7:
1475          if (flp->type == SDLA_S502A)
1476             return(-EINVAL);
1477          break;
1478 
1479       default:
1480          return(-EINVAL);
1481    }
1482    dev->irq = map->irq;
1483 
1484    if (request_irq(dev->irq, &sdla_isr, 0, dev->name, NULL)) 
1485       return(-EADDRINUSE);
1486 
1487    irq2dev_map[dev->irq] = dev;
1488 
1489    if (flp->type == SDLA_S507)
1490    {
1491       switch(dev->irq)
1492       {
1493          case 3:
1494             flp->state = SDLA_S507_IRQ3;
1495             break;
1496          case 4:
1497             flp->state = SDLA_S507_IRQ4;
1498             break;
1499          case 5:
1500             flp->state = SDLA_S507_IRQ5;
1501             break;
1502          case 7:
1503             flp->state = SDLA_S507_IRQ7;
1504             break;
1505          case 10:
1506             flp->state = SDLA_S507_IRQ10;
1507             break;
1508          case 11:
1509             flp->state = SDLA_S507_IRQ11;
1510             break;
1511          case 12:
1512             flp->state = SDLA_S507_IRQ12;
1513             break;
1514          case 15:
1515             flp->state = SDLA_S507_IRQ15;
1516             break;
1517       }
1518    }
1519 
1520    for(i=0;i < sizeof(valid_mem) / sizeof (int) ; i++)
1521       if (valid_mem[i] == map->mem_start)
1522          break;   
1523 
1524    if (i == sizeof(valid_mem) / sizeof(int))
1525       return(-EINVAL);
1526 
1527    if ((flp->type == SDLA_S502A) && (((map->mem_start & 0xF000) >> 12) == 0x0E))
1528       return(-EINVAL);
1529 
1530    if ((flp->type != SDLA_S507) && ((map->mem_start >> 16) == 0x0B))
1531       return(-EINVAL);
1532 
1533    if ((flp->type == SDLA_S507) && ((map->mem_start >> 16) == 0x0D))
1534       return(-EINVAL);
1535 
1536    dev->mem_start = map->mem_start;
1537    dev->mem_end = dev->mem_start + 0x2000;
1538 
1539    byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1540    byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1541    switch(flp->type)
1542    {
1543       case SDLA_S502A:
1544       case SDLA_S502E:
1545          switch (map->mem_start >> 16)
1546          {
1547             case 0x0A:
1548                byte |= SDLA_S502_SEG_A;
1549                break;
1550             case 0x0C:
1551                byte |= SDLA_S502_SEG_C;
1552                break;
1553             case 0x0D:
1554                byte |= SDLA_S502_SEG_D;
1555                break;
1556             case 0x0E:
1557                byte |= SDLA_S502_SEG_E;
1558                break;
1559          }
1560          break;
1561       case SDLA_S507:
1562          switch (map->mem_start >> 16)
1563          {
1564             case 0x0A:
1565                byte |= SDLA_S507_SEG_A;
1566                break;
1567             case 0x0B:
1568                byte |= SDLA_S507_SEG_B;
1569                break;
1570             case 0x0C:
1571                byte |= SDLA_S507_SEG_C;
1572                break;
1573             case 0x0E:
1574                byte |= SDLA_S507_SEG_E;
1575                break;
1576          }
1577          break;
1578       case SDLA_S508:
1579          switch (map->mem_start >> 16)
1580          {
1581             case 0x0A:
1582                byte |= SDLA_S508_SEG_A;
1583                break;
1584             case 0x0C:
1585                byte |= SDLA_S508_SEG_C;
1586                break;
1587             case 0x0D:
1588                byte |= SDLA_S508_SEG_D;
1589                break;
1590             case 0x0E:
1591                byte |= SDLA_S508_SEG_E;
1592                break;
1593          }
1594          break;
1595    }
1596 
1597    /* set the memory bits, and enable access */
1598    outb(byte, dev->base_addr + SDLA_REG_PC_WINDOW);
1599    switch(flp->type)
1600    {
1601       case SDLA_S502E:
1602          flp->state = SDLA_S502E_ENABLE;
1603          break;
1604       case SDLA_S507:
1605          flp->state |= SDLA_MEMEN;
1606          break;
1607       case SDLA_S508:
1608          flp->state = SDLA_MEMEN;
1609          break;
1610    }
1611    outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1612 
1613    flp->initialized = 1;
1614    return(0);
1615 }
1616  
1617 static struct enet_statistics *sdla_stats(struct device *dev)
     /*  */
1618 {
1619    struct frad_local *flp;
1620 
1621    flp = dev->priv;
1622 
1623    return(&flp->stats);
1624 }
1625 
1626 int sdla_init(struct device *dev)
     /*  */
1627 {
1628    struct frad_local *flp;
1629    int               i;
1630 
1631    /* allocate the private data structure */
1632    flp = kmalloc(sizeof(struct frad_local), GFP_KERNEL);
1633    if (!flp)
1634       return(-ENOMEM);
1635 
1636    memset(flp, 0, sizeof(struct frad_local));
1637    dev->priv = flp;
1638 
1639    dev->flags           = 0;
1640    dev->open            = sdla_open;
1641    dev->stop            = sdla_close;
1642    dev->do_ioctl        = sdla_ioctl;
1643    dev->set_config      = sdla_set_config;
1644    dev->get_stats       = sdla_stats;
1645    dev->hard_start_xmit = sdla_transmit;
1646    dev->change_mtu      = sdla_change_mtu;
1647 
1648    dev->type            = 0xFFFF;
1649    dev->family          = AF_UNSPEC;
1650    dev->pa_alen         = 0;
1651    dev->pa_addr         = 0;
1652    dev->pa_dstaddr      = 0;
1653    dev->pa_brdaddr      = 0;
1654    dev->pa_mask         = 0;
1655    dev->hard_header_len = 0;
1656    dev->addr_len        = 0;
1657    dev->mtu             = SDLA_MAX_MTU;
1658 
1659    for (i = 0; i < DEV_NUMBUFFS; i++) 
1660       skb_queue_head_init(&dev->buffs[i]);
1661 
1662    flp->activate        = sdla_activate;
1663    flp->deactivate      = sdla_deactivate;
1664    flp->assoc           = sdla_assoc;
1665    flp->deassoc         = sdla_deassoc;
1666    flp->dlci_conf       = sdla_dlci_conf;
1667 
1668    init_timer(&flp->timer);
1669    flp->timer.expires   = 1;
1670    flp->timer.data      = (unsigned long) dev;
1671    flp->timer.function  = sdla_poll;
1672 
1673    return(0);
1674 }
1675 
1676 void sdla_setup(void)
     /*  */
1677 {
1678    printk("%s.\n", version);
1679    register_frad(devname);
1680 }
1681 
1682 #ifdef MODULE
1683 static struct device sdla0 = {"sdla0", 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, sdla_init};
1684 
1685 int init_module(void)
     /*  */
1686 {
1687    int result;
1688 
1689    sdla_setup();
1690    if ((result = register_netdev(&sdla0)) != 0)
1691       return result;
1692 
1693    return 0;
1694 }
1695 
1696 void cleanup_module(void)
     /*  */
1697 {
1698    unregister_netdev(&sdla0);
1699    if (sdla0.priv)
1700       kfree(sdla0.priv);
1701    if (sdla0.irq)
1702       free_irq(sdla0.irq, NULL);
1703 }
1704 #endif /* MODULE */
/* */
root/drivers/net/sdla.c

DEFINITIONS
