drivers/net/wan/sdla.c

   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   0.30       12 Sep 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  *              0.25    Mike McLagan    Fixed problem with rejecting packets
  25  *                                      from non DLCI devices.
  26  *              0.30    Mike McLagan    Fixed kernel panic when used with modified
  27  *                                      ifconfig
  28  *
  29  *              This program is free software; you can redistribute it and/or
  30  *              modify it under the terms of the GNU General Public License
  31  *              as published by the Free Software Foundation; either version
  32  *              2 of the License, or (at your option) any later version.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/kernel.h>
  37 #include <linux/types.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/ptrace.h>
  41 #include <linux/ioport.h>
  42 #include <linux/in.h>
  43 #include <linux/slab.h>
  44 #include <linux/string.h>
  45 #include <linux/timer.h>
  46 #include <linux/errno.h>
  47 #include <linux/init.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/if_arp.h>
  51 #include <linux/if_frad.h>
  52 #include <linux/sdla.h>
  53 #include <linux/bitops.h>
  54
  55 #include <asm/system.h>
  56 #include <asm/io.h>
  57 #include <asm/dma.h>
  58 #include <asm/uaccess.h>
  59
  60 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
  61
  62 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
  63
  64 static unsigned int valid_mem[] = {
  65                                     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 static DEFINE_SPINLOCK(sdla_lock);
  72
  73 /*********************************************************
  74  *
  75  * these are the core routines that access the card itself
  76  *
  77  *********************************************************/
  78
  79 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
  80
  81 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
  82 {
  83         char          *temp;
  84         const void    *base;
  85         int           offset, bytes;
  86
  87         temp = buf;
  88         while(len)
  89         {
  90                 offset = addr & SDLA_ADDR_MASK;
  91                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
  92                 base = (const void *) (dev->mem_start + offset);
  93
  94                 SDLA_WINDOW(dev, addr);
  95                 memcpy(temp, base, bytes);
  96
  97                 addr += bytes;
  98                 temp += bytes;
  99                 len  -= bytes;
 100         }
 101 }
 102
 103 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
 104 {
 105         unsigned long flags;
 106         spin_lock_irqsave(&sdla_lock, flags);
 107         __sdla_read(dev, addr, buf, len);
 108         spin_unlock_irqrestore(&sdla_lock, flags);
 109 }
 110
 111 static void __sdla_write(struct net_device *dev, int addr,
 112                          const void *buf, short len)
 113 {
 114         const char    *temp;
 115         void          *base;
 116         int           offset, bytes;
 117
 118         temp = buf;
 119         while(len)
 120         {
 121                 offset = addr & SDLA_ADDR_MASK;
 122                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
 123                 base = (void *) (dev->mem_start + offset);
 124
 125                 SDLA_WINDOW(dev, addr);
 126                 memcpy(base, temp, bytes);
 127
 128                 addr += bytes;
 129                 temp += bytes;
 130                 len  -= bytes;
 131         }
 132 }
 133
 134 static void sdla_write(struct net_device *dev, int addr,
 135                        const void *buf, short len)
 136 {
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&sdla_lock, flags);
 140         __sdla_write(dev, addr, buf, len);
 141         spin_unlock_irqrestore(&sdla_lock, flags);
 142 }
 143
 144
 145 static void sdla_clear(struct net_device *dev)
 146 {
 147         unsigned long flags;
 148         char          *base;
 149         int           len, addr, bytes;
 150
 151         len = 65536;
 152         addr = 0;
 153         bytes = SDLA_WINDOW_SIZE;
 154         base = (void *) dev->mem_start;
 155
 156         spin_lock_irqsave(&sdla_lock, flags);
 157         while(len)
 158         {
 159                 SDLA_WINDOW(dev, addr);
 160                 memset(base, 0, bytes);
 161
 162                 addr += bytes;
 163                 len  -= bytes;
 164         }
 165         spin_unlock_irqrestore(&sdla_lock, flags);
 166
 167 }
 168
 169 static char sdla_byte(struct net_device *dev, int addr)
 170 {
 171         unsigned long flags;
 172         char          byte, *temp;
 173
 174         temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
 175
 176         spin_lock_irqsave(&sdla_lock, flags);
 177         SDLA_WINDOW(dev, addr);
 178         byte = *temp;
 179         spin_unlock_irqrestore(&sdla_lock, flags);
 180
 181         return(byte);
 182 }
 183
 184 static void sdla_stop(struct net_device *dev)
 185 {
 186         struct frad_local *flp;
 187
 188         flp = dev->priv;
 189         switch(flp->type)
 190         {
 191                 case SDLA_S502A:
 192                         outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
 193                         flp->state = SDLA_HALT;
 194                         break;
 195                 case SDLA_S502E:
 196                         outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
 197                         outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
 198                         flp->state = SDLA_S502E_ENABLE;
 199                         break;
 200                 case SDLA_S507:
 201                         flp->state &= ~SDLA_CPUEN;
 202                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 203                         break;
 204                 case SDLA_S508:
 205                         flp->state &= ~SDLA_CPUEN;
 206                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 207                         break;
 208         }
 209 }
 210
 211 static void sdla_start(struct net_device *dev)
 212 {
 213         struct frad_local *flp;
 214
 215         flp = dev->priv;
 216         switch(flp->type)
 217         {
 218                 case SDLA_S502A:
 219                         outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
 220                         outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
 221                         flp->state = SDLA_S502A_START;
 222                         break;
 223                 case SDLA_S502E:
 224                         outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
 225                         outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
 226                         flp->state = 0;
 227                         break;
 228                 case SDLA_S507:
 229                         flp->state |= SDLA_CPUEN;
 230                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 231                         break;
 232                 case SDLA_S508:
 233                         flp->state |= SDLA_CPUEN;
 234                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 235                         break;
 236         }
 237 }
 238
 239 /****************************************************
 240  *
 241  * this is used for the S502A/E cards to determine
 242  * the speed of the onboard CPU.  Calibration is
 243  * necessary for the Frame Relay code uploaded
 244  * later.  Incorrect results cause timing problems
 245  * with link checks & status messages
 246  *
 247  ***************************************************/
 248
 249 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
 250 {
 251         unsigned long start, done, now;
 252         char          resp, *temp;
 253
 254         start = now = jiffies;
 255         done = jiffies + jiffs;
 256
 257         temp = (void *)dev->mem_start;
 258         temp += z80_addr & SDLA_ADDR_MASK;
 259
 260         resp = ~resp1;
 261         while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
 262         {
 263                 if (jiffies != now)
 264                 {
 265                         SDLA_WINDOW(dev, z80_addr);
 266                         now = jiffies;
 267                         resp = *temp;
 268                 }
 269         }
 270         return(time_before(jiffies, done) ? jiffies - start : -1);
 271 }
 272
 273 /* constants for Z80 CPU speed */
 274 #define Z80_READY               '1'     /* Z80 is ready to begin */
 275 #define LOADER_READY            '2'     /* driver is ready to begin */
 276 #define Z80_SCC_OK              '3'     /* SCC is on board */
 277 #define Z80_SCC_BAD             '4'     /* SCC was not found */
 278
 279 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
 280 {
 281         int  jiffs;
 282         char data;
 283
 284         sdla_start(dev);
 285         if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
 286                 return(-EIO);
 287
 288         data = LOADER_READY;
 289         sdla_write(dev, 0, &data, 1);
 290
 291         if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
 292                 return(-EIO);
 293
 294         sdla_stop(dev);
 295         sdla_read(dev, 0, &data, 1);
 296
 297         if (data == Z80_SCC_BAD)
 298         {
 299                 printk("%s: SCC bad\n", dev->name);
 300                 return(-EIO);
 301         }
 302
 303         if (data != Z80_SCC_OK)
 304                 return(-EINVAL);
 305
 306         if (jiffs < 165)
 307                 ifr->ifr_mtu = SDLA_CPU_16M;
 308         else if (jiffs < 220)
 309                 ifr->ifr_mtu = SDLA_CPU_10M;
 310         else if (jiffs < 258)
 311                 ifr->ifr_mtu = SDLA_CPU_8M;
 312         else if (jiffs < 357)
 313                 ifr->ifr_mtu = SDLA_CPU_7M;
 314         else if (jiffs < 467)
 315                 ifr->ifr_mtu = SDLA_CPU_5M;
 316         else
 317                 ifr->ifr_mtu = SDLA_CPU_3M;
 318
 319         return(0);
 320 }
 321
 322 /************************************************
 323  *
 324  *  Direct interaction with the Frame Relay code
 325  *  starts here.
 326  *
 327  ************************************************/
 328
 329 struct _dlci_stat
 330 {
 331         short dlci;
 332         char  flags;
 333 } __attribute__((packed));
 334
 335 struct _frad_stat
 336 {
 337         char    flags;
 338         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 339 };
 340
 341 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
 342 {
 343         struct _dlci_stat *pstatus;
 344         short             *pdlci;
 345         int               i;
 346         char              *state, line[30];
 347
 348         switch (ret)
 349         {
 350                 case SDLA_RET_MODEM:
 351                         state = data;
 352                         if (*state & SDLA_MODEM_DCD_LOW)
 353                                 printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
 354                         if (*state & SDLA_MODEM_CTS_LOW)
 355                                 printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
 356                         /* I should probably do something about this! */
 357                         break;
 358
 359                 case SDLA_RET_CHANNEL_OFF:
 360                         printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
 361                         /* same here */
 362                         break;
 363
 364                 case SDLA_RET_CHANNEL_ON:
 365                         printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
 366                         /* same here */
 367                         break;
 368
 369                 case SDLA_RET_DLCI_STATUS:
 370                         printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
 371                         len /= sizeof(struct _dlci_stat);
 372                         for(pstatus = data, i=0;i < len;i++,pstatus++)
 373                         {
 374                                 if (pstatus->flags & SDLA_DLCI_NEW)
 375                                         state = "new";
 376                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
 377                                         state = "deleted";
 378                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
 379                                         state = "active";
 380                                 else
 381                                 {
 382                                         sprintf(line, "unknown status: %02X", pstatus->flags);
 383                                         state = line;
 384                                 }
 385                                 printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
 386                                 /* same here */
 387                         }
 388                         break;
 389
 390                 case SDLA_RET_DLCI_UNKNOWN:
 391                         printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
 392                         len /= sizeof(short);
 393                         for(pdlci = data,i=0;i < len;i++,pdlci++)
 394                                 printk(" %i", *pdlci);
 395                         printk("\n");
 396                         break;
 397
 398                 case SDLA_RET_TIMEOUT:
 399                         printk(KERN_ERR "%s: Command timed out!\n", dev->name);
 400                         break;
 401
 402                 case SDLA_RET_BUF_OVERSIZE:
 403                         printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
 404                         break;
 405
 406                 case SDLA_RET_BUF_TOO_BIG:
 407                         printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
 408                         break;
 409
 410                 case SDLA_RET_CHANNEL_INACTIVE:
 411                 case SDLA_RET_DLCI_INACTIVE:
 412                 case SDLA_RET_CIR_OVERFLOW:
 413                 case SDLA_RET_NO_BUFS:
 414                         if (cmd == SDLA_INFORMATION_WRITE)
 415                                 break;
 416
 417                 default:
 418                         printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
 419                         /* Further processing could be done here */
 420                         break;
 421         }
 422 }
 423
 424 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
 425                         void *inbuf, short inlen, void *outbuf, short *outlen)
 426 {
 427         static struct _frad_stat status;
 428         struct frad_local        *flp;
 429         struct sdla_cmd          *cmd_buf;
 430         unsigned long            pflags;
 431         unsigned long            jiffs;
 432         int                      ret, waiting, len;
 433         long                     window;
 434
 435         flp = dev->priv;
 436         window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
 437         cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
 438         ret = 0;
 439         len = 0;
 440         jiffs = jiffies + HZ;  /* 1 second is plenty */
 441
 442         spin_lock_irqsave(&sdla_lock, pflags);
 443         SDLA_WINDOW(dev, window);
 444         cmd_buf->cmd = cmd;
 445         cmd_buf->dlci = dlci;
 446         cmd_buf->flags = flags;
 447
 448         if (inbuf)
 449                 memcpy(cmd_buf->data, inbuf, inlen);
 450
 451         cmd_buf->length = inlen;
 452
 453         cmd_buf->opp_flag = 1;
 454         spin_unlock_irqrestore(&sdla_lock, pflags);
 455
 456         waiting = 1;
 457         len = 0;
 458         while (waiting && time_before_eq(jiffies, jiffs))
 459         {
 460                 if (waiting++ % 3)
 461                 {
 462                         spin_lock_irqsave(&sdla_lock, pflags);
 463                         SDLA_WINDOW(dev, window);
 464                         waiting = ((volatile int)(cmd_buf->opp_flag));
 465                         spin_unlock_irqrestore(&sdla_lock, pflags);
 466                 }
 467         }
 468
 469         if (!waiting)
 470         {
 471
 472                 spin_lock_irqsave(&sdla_lock, pflags);
 473                 SDLA_WINDOW(dev, window);
 474                 ret = cmd_buf->retval;
 475                 len = cmd_buf->length;
 476                 if (outbuf && outlen)
 477                 {
 478                         *outlen = *outlen >= len ? len : *outlen;
 479
 480                         if (*outlen)
 481                                 memcpy(outbuf, cmd_buf->data, *outlen);
 482                 }
 483
 484                 /* This is a local copy that's used for error handling */
 485                 if (ret)
 486                         memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
 487
 488                 spin_unlock_irqrestore(&sdla_lock, pflags);
 489         }
 490         else
 491                 ret = SDLA_RET_TIMEOUT;
 492
 493         if (ret != SDLA_RET_OK)
 494                 sdla_errors(dev, cmd, dlci, ret, len, &status);
 495
 496         return(ret);
 497 }
 498
 499 /***********************************************
 500  *
 501  * these functions are called by the DLCI driver
 502  *
 503  ***********************************************/
 504
 505 static int sdla_reconfig(struct net_device *dev);
 506
 507 static int sdla_activate(struct net_device *slave, struct net_device *master)
 508 {
 509         struct frad_local *flp;
 510         int i;
 511
 512         flp = slave->priv;
 513
 514         for(i=0;i<CONFIG_DLCI_MAX;i++)
 515                 if (flp->master[i] == master)
 516                         break;
 517
 518         if (i == CONFIG_DLCI_MAX)
 519                 return(-ENODEV);
 520
 521         flp->dlci[i] = abs(flp->dlci[i]);
 522
 523         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 524                 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 525
 526         return(0);
 527 }
 528
 529 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
 530 {
 531         struct frad_local *flp;
 532         int               i;
 533
 534         flp = slave->priv;
 535
 536         for(i=0;i<CONFIG_DLCI_MAX;i++)
 537                 if (flp->master[i] == master)
 538                         break;
 539
 540         if (i == CONFIG_DLCI_MAX)
 541                 return(-ENODEV);
 542
 543         flp->dlci[i] = -abs(flp->dlci[i]);
 544
 545         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 546                 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 547
 548         return(0);
 549 }
 550
 551 static int sdla_assoc(struct net_device *slave, struct net_device *master)
 552 {
 553         struct frad_local *flp;
 554         int               i;
 555
 556         if (master->type != ARPHRD_DLCI)
 557                 return(-EINVAL);
 558
 559         flp = slave->priv;
 560
 561         for(i=0;i<CONFIG_DLCI_MAX;i++)
 562         {
 563                 if (!flp->master[i])
 564                         break;
 565                 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
 566                         return(-EADDRINUSE);
 567         }
 568
 569         if (i == CONFIG_DLCI_MAX)
 570                 return(-EMLINK);  /* #### Alan: Comments on this ?? */
 571
 572
 573         flp->master[i] = master;
 574         flp->dlci[i] = -*(short *)(master->dev_addr);
 575         master->mtu = slave->mtu;
 576
 577         if (netif_running(slave)) {
 578                 if (flp->config.station == FRAD_STATION_CPE)
 579                         sdla_reconfig(slave);
 580                 else
 581                         sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 582         }
 583
 584         return(0);
 585 }
 586
 587 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
 588 {
 589         struct frad_local *flp;
 590         int               i;
 591
 592         flp = slave->priv;
 593
 594         for(i=0;i<CONFIG_DLCI_MAX;i++)
 595                 if (flp->master[i] == master)
 596                         break;
 597
 598         if (i == CONFIG_DLCI_MAX)
 599                 return(-ENODEV);
 600
 601         flp->master[i] = NULL;
 602         flp->dlci[i] = 0;
 603
 604
 605         if (netif_running(slave)) {
 606                 if (flp->config.station == FRAD_STATION_CPE)
 607                         sdla_reconfig(slave);
 608                 else
 609                         sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 610         }
 611
 612         return(0);
 613 }
 614
 615 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
 616 {
 617         struct frad_local *flp;
 618         struct dlci_local *dlp;
 619         int               i;
 620         short             len, ret;
 621
 622         flp = slave->priv;
 623
 624         for(i=0;i<CONFIG_DLCI_MAX;i++)
 625                 if (flp->master[i] == master)
 626                         break;
 627
 628         if (i == CONFIG_DLCI_MAX)
 629                 return(-ENODEV);
 630
 631         dlp = master->priv;
 632
 633         ret = SDLA_RET_OK;
 634         len = sizeof(struct dlci_conf);
 635         if (netif_running(slave)) {
 636                 if (get)
 637                         ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 638                                     NULL, 0, &dlp->config, &len);
 639                 else
 640                         ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 641                                     &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
 642         }
 643
 644         return(ret == SDLA_RET_OK ? 0 : -EIO);
 645 }
 646
 647 /**************************
 648  *
 649  * now for the Linux driver
 650  *
 651  **************************/
 652
 653 /* NOTE: the DLCI driver deals with freeing the SKB!! */
 654 static int sdla_transmit(struct sk_buff *skb, struct net_device *dev)
 655 {
 656         struct frad_local *flp;
 657         int               ret, addr, accept, i;
 658         short             size;
 659         unsigned long     flags;
 660         struct buf_entry  *pbuf;
 661
 662         flp = dev->priv;
 663         ret = 0;
 664         accept = 1;
 665
 666         netif_stop_queue(dev);
 667
 668         /*
 669          * stupid GateD insists on setting up the multicast router thru us
 670          * and we're ill equipped to handle a non Frame Relay packet at this
 671          * time!
 672          */
 673
 674         accept = 1;
 675         switch (dev->type)
 676         {
 677                 case ARPHRD_FRAD:
 678                         if (skb->dev->type != ARPHRD_DLCI)
 679                         {
 680                                 printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
 681                                 accept = 0;
 682                         }
 683                         break;
 684                 default:
 685                         printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
 686                         accept = 0;
 687                         break;
 688         }
 689         if (accept)
 690         {
 691                 /* this is frame specific, but till there's a PPP module, it's the default */
 692                 switch (flp->type)
 693                 {
 694                         case SDLA_S502A:
 695                         case SDLA_S502E:
 696                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 697                                 break;
 698                                 case SDLA_S508:
 699                                 size = sizeof(addr);
 700                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 701                                 if (ret == SDLA_RET_OK)
 702                                 {
 703
 704                                         spin_lock_irqsave(&sdla_lock, flags);
 705                                         SDLA_WINDOW(dev, addr);
 706                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 707                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 708                                         SDLA_WINDOW(dev, addr);
 709                                         pbuf->opp_flag = 1;
 710                                         spin_unlock_irqrestore(&sdla_lock, flags);
 711                                 }
 712                                 break;
 713                 }
 714                 switch (ret)
 715                 {
 716                         case SDLA_RET_OK:
 717                                 flp->stats.tx_packets++;
 718                                 ret = DLCI_RET_OK;
 719                                 break;
 720
 721                         case SDLA_RET_CIR_OVERFLOW:
 722                         case SDLA_RET_BUF_OVERSIZE:
 723                         case SDLA_RET_NO_BUFS:
 724                                 flp->stats.tx_dropped++;
 725                                 ret = DLCI_RET_DROP;
 726                                 break;
 727
 728                         default:
 729                                 flp->stats.tx_errors++;
 730                                 ret = DLCI_RET_ERR;
 731                                 break;
 732                 }
 733         }
 734         netif_wake_queue(dev);
 735         for(i=0;i<CONFIG_DLCI_MAX;i++)
 736         {
 737                 if(flp->master[i]!=NULL)
 738                         netif_wake_queue(flp->master[i]);
 739         }
 740         return(ret);
 741 }
 742
 743 static void sdla_receive(struct net_device *dev)
 744 {
 745         struct net_device         *master;
 746         struct frad_local *flp;
 747         struct dlci_local *dlp;
 748         struct sk_buff   *skb;
 749
 750         struct sdla_cmd *cmd;
 751         struct buf_info *pbufi;
 752         struct buf_entry  *pbuf;
 753
 754         unsigned long     flags;
 755         int               i=0, received, success, addr, buf_base, buf_top;
 756         short             dlci, len, len2, split;
 757
 758         flp = dev->priv;
 759         success = 1;
 760         received = addr = buf_top = buf_base = 0;
 761         len = dlci = 0;
 762         skb = NULL;
 763         master = NULL;
 764         cmd = NULL;
 765         pbufi = NULL;
 766         pbuf = NULL;
 767
 768         spin_lock_irqsave(&sdla_lock, flags);
 769
 770         switch (flp->type)
 771         {
 772                 case SDLA_S502A:
 773                 case SDLA_S502E:
 774                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 775                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 776                         success = cmd->opp_flag;
 777                         if (!success)
 778                                 break;
 779
 780                         dlci = cmd->dlci;
 781                         len = cmd->length;
 782                         break;
 783
 784                 case SDLA_S508:
 785                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 786                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 787                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 788                         success = pbuf->opp_flag;
 789                         if (!success)
 790                                 break;
 791
 792                         buf_top = pbufi->buf_top;
 793                         buf_base = pbufi->buf_base;
 794                         dlci = pbuf->dlci;
 795                         len = pbuf->length;
 796                         addr = pbuf->buf_addr;
 797                         break;
 798         }
 799
 800         /* common code, find the DLCI and get the SKB */
 801         if (success)
 802         {
 803                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 804                         if (flp->dlci[i] == dlci)
 805                                 break;
 806
 807                 if (i == CONFIG_DLCI_MAX)
 808                 {
 809                         printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
 810                         flp->stats.rx_errors++;
 811                         success = 0;
 812                 }
 813         }
 814
 815         if (success)
 816         {
 817                 master = flp->master[i];
 818                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 819                 if (skb == NULL)
 820                 {
 821                         printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 822                         flp->stats.rx_dropped++;
 823                         success = 0;
 824                 }
 825                 else
 826                         skb_reserve(skb, sizeof(struct frhdr));
 827         }
 828
 829         /* pick up the data */
 830         switch (flp->type)
 831         {
 832                 case SDLA_S502A:
 833                 case SDLA_S502E:
 834                         if (success)
 835                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 836
 837                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 838                         cmd->opp_flag = 0;
 839                         break;
 840
 841                 case SDLA_S508:
 842                         if (success)
 843                         {
 844                                 /* is this buffer split off the end of the internal ring buffer */
 845                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 846                                 len2 = len - split;
 847
 848                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 849                                 if (split)
 850                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 851                         }
 852
 853                         /* increment the buffer we're looking at */
 854                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 855                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 856                         pbuf->opp_flag = 0;
 857                         break;
 858         }
 859
 860         if (success)
 861         {
 862                 flp->stats.rx_packets++;
 863                 dlp = master->priv;
 864                 (*dlp->receive)(skb, master);
 865         }
 866
 867         spin_unlock_irqrestore(&sdla_lock, flags);
 868 }
 869
 870 static irqreturn_t sdla_isr(int irq, void *dev_id)
 871 {
 872         struct net_device     *dev;
 873         struct frad_local *flp;
 874         char              byte;
 875
 876         dev = dev_id;
 877
 878         if (dev == NULL)
 879         {
 880                 printk(KERN_WARNING "sdla_isr(): irq %d for unknown device.\n", irq);
 881                 return IRQ_NONE;
 882         }
 883
 884         flp = dev->priv;
 885
 886         if (!flp->initialized)
 887         {
 888                 printk(KERN_WARNING "%s: irq %d for uninitialized device.\n", dev->name, irq);
 889                 return IRQ_NONE;
 890         }
 891
 892         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 893         switch (byte)
 894         {
 895                 case SDLA_INTR_RX:
 896                         sdla_receive(dev);
 897                         break;
 898
 899                 /* the command will get an error return, which is processed above */
 900                 case SDLA_INTR_MODEM:
 901                 case SDLA_INTR_STATUS:
 902                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 903                         break;
 904
 905                 case SDLA_INTR_TX:
 906                 case SDLA_INTR_COMPLETE:
 907                 case SDLA_INTR_TIMER:
 908                         printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
 909                         break;
 910         }
 911
 912         /* the S502E requires a manual acknowledgement of the interrupt */
 913         if (flp->type == SDLA_S502E)
 914         {
 915                 flp->state &= ~SDLA_S502E_INTACK;
 916                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 917                 flp->state |= SDLA_S502E_INTACK;
 918                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 919         }
 920
 921         /* this clears the byte, informing the Z80 we're done */
 922         byte = 0;
 923         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 924         return IRQ_HANDLED;
 925 }
 926
 927 static void sdla_poll(unsigned long device)
 928 {
 929         struct net_device         *dev;
 930         struct frad_local *flp;
 931
 932         dev = (struct net_device *) device;
 933         flp = dev->priv;
 934
 935         if (sdla_byte(dev, SDLA_502_RCV_BUF))
 936                 sdla_receive(dev);
 937
 938         flp->timer.expires = 1;
 939         add_timer(&flp->timer);
 940 }
 941
 942 static int sdla_close(struct net_device *dev)
 943 {
 944         struct frad_local *flp;
 945         struct intr_info  intr;
 946         int               len, i;
 947         short             dlcis[CONFIG_DLCI_MAX];
 948
 949         flp = dev->priv;
 950
 951         len = 0;
 952         for(i=0;i<CONFIG_DLCI_MAX;i++)
 953                 if (flp->dlci[i])
 954                         dlcis[len++] = abs(flp->dlci[i]);
 955         len *= 2;
 956
 957         if (flp->config.station == FRAD_STATION_NODE)
 958         {
 959                 for(i=0;i<CONFIG_DLCI_MAX;i++)
 960                         if (flp->dlci[i] > 0)
 961                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 962                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 963         }
 964
 965         memset(&intr, 0, sizeof(intr));
 966         /* let's start up the reception */
 967         switch(flp->type)
 968         {
 969                 case SDLA_S502A:
 970                         del_timer(&flp->timer);
 971                         break;
 972
 973                 case SDLA_S502E:
 974                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 975                         flp->state &= ~SDLA_S502E_INTACK;
 976                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 977                         break;
 978
 979                 case SDLA_S507:
 980                         break;
 981
 982                 case SDLA_S508:
 983                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 984                         flp->state &= ~SDLA_S508_INTEN;
 985                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 986                         break;
 987         }
 988
 989         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 990
 991         netif_stop_queue(dev);
 992
 993         return(0);
 994 }
 995
 996 struct conf_data {
 997         struct frad_conf config;
 998         short            dlci[CONFIG_DLCI_MAX];
 999 };
1000
1001 static int sdla_open(struct net_device *dev)
1002 {
1003         struct frad_local *flp;
1004         struct dlci_local *dlp;
1005         struct conf_data  data;
1006         struct intr_info  intr;
1007         int               len, i;
1008         char              byte;
1009
1010         flp = dev->priv;
1011
1012         if (!flp->initialized)
1013                 return(-EPERM);
1014
1015         if (!flp->configured)
1016                 return(-EPERM);
1017
1018         /* time to send in the configuration */
1019         len = 0;
1020         for(i=0;i<CONFIG_DLCI_MAX;i++)
1021                 if (flp->dlci[i])
1022                         data.dlci[len++] = abs(flp->dlci[i]);
1023         len *= 2;
1024
1025         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1026         len += sizeof(struct frad_conf);
1027
1028         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1029         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1030
1031         if (flp->type == SDLA_S508)
1032                 flp->buffer = 0;
1033
1034         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1035
1036         /* let's start up the reception */
1037         memset(&intr, 0, sizeof(intr));
1038         switch(flp->type)
1039         {
1040                 case SDLA_S502A:
1041                         flp->timer.expires = 1;
1042                         add_timer(&flp->timer);
1043                         break;
1044
1045                 case SDLA_S502E:
1046                         flp->state |= SDLA_S502E_ENABLE;
1047                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1048                         flp->state |= SDLA_S502E_INTACK;
1049                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1050                         byte = 0;
1051                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1052                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1053                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1054                         break;
1055
1056                 case SDLA_S507:
1057                         break;
1058
1059                 case SDLA_S508:
1060                         flp->state |= SDLA_S508_INTEN;
1061                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1062                         byte = 0;
1063                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1064                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1065                         intr.irq = dev->irq;
1066                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1067                         break;
1068         }
1069
1070         if (flp->config.station == FRAD_STATION_CPE)
1071         {
1072                 byte = SDLA_ICS_STATUS_ENQ;
1073                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1074         }
1075         else
1076         {
1077                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1078                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1079                         if (flp->dlci[i] > 0)
1080                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1081         }
1082
1083         /* configure any specific DLCI settings */
1084         for(i=0;i<CONFIG_DLCI_MAX;i++)
1085                 if (flp->dlci[i])
1086                 {
1087                         dlp = flp->master[i]->priv;
1088                         if (dlp->configured)
1089                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1090                 }
1091
1092         netif_start_queue(dev);
1093
1094         return(0);
1095 }
1096
1097 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1098 {
1099         struct frad_local *flp;
1100         struct conf_data  data;
1101         int               i;
1102         short             size;
1103
1104         if (dev->type == 0xFFFF)
1105                 return(-EUNATCH);
1106
1107         flp = dev->priv;
1108
1109         if (!get)
1110         {
1111                 if (netif_running(dev))
1112                         return(-EBUSY);
1113
1114                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1115                         return -EFAULT;
1116
1117                 if (data.config.station & ~FRAD_STATION_NODE)
1118                         return(-EINVAL);
1119
1120                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1121                         return(-EINVAL);
1122
1123                 if ((data.config.kbaud < 0) ||
1124                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1125                         return(-EINVAL);
1126
1127                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1128                         return(-EINVAL);
1129
1130                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1131                         return(-EINVAL);
1132
1133                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1134                         return(-EINVAL);
1135
1136                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1137                         return(-EINVAL);
1138
1139                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1140                         return(-EINVAL);
1141
1142                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1143                         return(-EINVAL);
1144
1145                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1146                         return(-EINVAL);
1147
1148                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1149                 flp->config.flags |= SDLA_DIRECT_RECV;
1150
1151                 if (flp->type == SDLA_S508)
1152                         flp->config.flags |= SDLA_TX70_RX30;
1153
1154                 if (dev->mtu != flp->config.mtu)
1155                 {
1156                         /* this is required to change the MTU */
1157                         dev->mtu = flp->config.mtu;
1158                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1159                                 if (flp->master[i])
1160                                         flp->master[i]->mtu = flp->config.mtu;
1161                 }
1162
1163                 flp->config.mtu += sizeof(struct frhdr);
1164
1165                 /* off to the races! */
1166                 if (!flp->configured)
1167                         sdla_start(dev);
1168
1169                 flp->configured = 1;
1170         }
1171         else
1172         {
1173                 /* no sense reading if the CPU isn't started */
1174                 if (netif_running(dev))
1175                 {
1176                         size = sizeof(data);
1177                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1178                                 return(-EIO);
1179                 }
1180                 else
1181                         if (flp->configured)
1182                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1183                         else
1184                                 memset(&data.config, 0, sizeof(struct frad_conf));
1185
1186                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1187                 data.config.flags &= FRAD_VALID_FLAGS;
1188                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1189                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1190         }
1191
1192         return(0);
1193 }
1194
1195 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1196 {
1197         struct sdla_mem mem;
1198         char    *temp;
1199
1200         if(copy_from_user(&mem, info, sizeof(mem)))
1201                 return -EFAULT;
1202
1203         if (read)
1204         {
1205                 temp = kmalloc(mem.len, GFP_KERNEL);
1206                 if (!temp)
1207                         return(-ENOMEM);
1208                 memset(temp, 0, mem.len);
1209                 sdla_read(dev, mem.addr, temp, mem.len);
1210                 if(copy_to_user(mem.data, temp, mem.len))
1211                 {
1212                         kfree(temp);
1213                         return -EFAULT;
1214                 }
1215                 kfree(temp);
1216         }
1217         else
1218         {
1219                 temp = kmalloc(mem.len, GFP_KERNEL);
1220                 if (!temp)
1221                         return(-ENOMEM);
1222                 if(copy_from_user(temp, mem.data, mem.len))
1223                 {
1224                         kfree(temp);
1225                         return -EFAULT;
1226                 }
1227                 sdla_write(dev, mem.addr, temp, mem.len);
1228                 kfree(temp);
1229         }
1230         return(0);
1231 }
1232
1233 static int sdla_reconfig(struct net_device *dev)
1234 {
1235         struct frad_local *flp;
1236         struct conf_data  data;
1237         int               i, len;
1238
1239         flp = dev->priv;
1240
1241         len = 0;
1242         for(i=0;i<CONFIG_DLCI_MAX;i++)
1243                 if (flp->dlci[i])
1244                         data.dlci[len++] = flp->dlci[i];
1245         len *= 2;
1246
1247         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1248         len += sizeof(struct frad_conf);
1249
1250         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1251         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1252         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1253
1254         return(0);
1255 }
1256
1257 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1258 {
1259         struct frad_local *flp;
1260
1261         if(!capable(CAP_NET_ADMIN))
1262                 return -EPERM;
1263
1264         flp = dev->priv;
1265
1266         if (!flp->initialized)
1267                 return(-EINVAL);
1268
1269         switch (cmd)
1270         {
1271                 case FRAD_GET_CONF:
1272                 case FRAD_SET_CONF:
1273                         return(sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF));
1274
1275                 case SDLA_IDENTIFY:
1276                         ifr->ifr_flags = flp->type;
1277                         break;
1278
1279                 case SDLA_CPUSPEED:
1280                         return(sdla_cpuspeed(dev, ifr));
1281
1282 /* ==========================================================
1283 NOTE:  This is rather a useless action right now, as the
1284        current driver does not support protocols other than
1285        FR.  However, Sangoma has modules for a number of
1286        other protocols in the works.
1287 ============================================================*/
1288                 case SDLA_PROTOCOL:
1289                         if (flp->configured)
1290                                 return(-EALREADY);
1291
1292                         switch (ifr->ifr_flags)
1293                         {
1294                                 case ARPHRD_FRAD:
1295                                         dev->type = ifr->ifr_flags;
1296                                         break;
1297                                 default:
1298                                         return(-ENOPROTOOPT);
1299                         }
1300                         break;
1301
1302                 case SDLA_CLEARMEM:
1303                         sdla_clear(dev);
1304                         break;
1305
1306                 case SDLA_WRITEMEM:
1307                 case SDLA_READMEM:
1308                         if(!capable(CAP_SYS_RAWIO))
1309                                 return -EPERM;
1310                         return(sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM));
1311
1312                 case SDLA_START:
1313                         sdla_start(dev);
1314                         break;
1315
1316                 case SDLA_STOP:
1317                         sdla_stop(dev);
1318                         break;
1319
1320                 default:
1321                         return(-EOPNOTSUPP);
1322         }
1323         return(0);
1324 }
1325
1326 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1327 {
1328         struct frad_local *flp;
1329
1330         flp = dev->priv;
1331
1332         if (netif_running(dev))
1333                 return(-EBUSY);
1334
1335         /* for now, you can't change the MTU! */
1336         return(-EOPNOTSUPP);
1337 }
1338
1339 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1340 {
1341         struct frad_local *flp;
1342         int               i;
1343         char              byte;
1344         unsigned base;
1345         int err = -EINVAL;
1346
1347         flp = dev->priv;
1348
1349         if (flp->initialized)
1350                 return(-EINVAL);
1351
1352         for(i=0;i < sizeof(valid_port) / sizeof (int) ; i++)
1353                 if (valid_port[i] == map->base_addr)
1354                         break;
1355
1356         if (i == sizeof(valid_port) / sizeof(int))
1357                 return(-EINVAL);
1358
1359         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1360                 printk(KERN_WARNING "SDLA: io-port 0x%04lx in use \n", dev->base_addr);
1361                 return(-EINVAL);
1362         }
1363         base = map->base_addr;
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(base + i) != 0xFF)
1372                         break;
1373
1374         if (i == SDLA_IO_EXTENTS) {
1375                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1376                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1377                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1378                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1379                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1380                                 flp->type = SDLA_S502E;
1381                                 goto got_type;
1382                         }
1383                 }
1384         }
1385
1386         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1387                 if (inb(base + i) != byte)
1388                         break;
1389
1390         if (i == SDLA_IO_EXTENTS) {
1391                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1392                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1393                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1394                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1395                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1396                                 flp->type = SDLA_S507;
1397                                 goto got_type;
1398                         }
1399                 }
1400         }
1401
1402         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1403         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1404                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1405                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1406                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1407                         flp->type = SDLA_S508;
1408                         goto got_type;
1409                 }
1410         }
1411
1412         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1413         if (inb(base + SDLA_S502_STS) == 0x40) {
1414                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1415                 if (inb(base + SDLA_S502_STS) == 0x40) {
1416                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1417                         if (inb(base + SDLA_S502_STS) == 0x44) {
1418                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1419                                 flp->type = SDLA_S502A;
1420                                 goto got_type;
1421                         }
1422                 }
1423         }
1424
1425         printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1426         err = -ENODEV;
1427         goto fail;
1428
1429 got_type:
1430         switch(base) {
1431                 case 0x270:
1432                 case 0x280:
1433                 case 0x380:
1434                 case 0x390:
1435                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1436                                 goto fail;
1437         }
1438
1439         switch (map->irq) {
1440                 case 2:
1441                         if (flp->type != SDLA_S502E)
1442                                 goto fail;
1443                         break;
1444
1445                 case 10:
1446                 case 11:
1447                 case 12:
1448                 case 15:
1449                 case 4:
1450                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1451                                 goto fail;
1452                         break;
1453                 case 3:
1454                 case 5:
1455                 case 7:
1456                         if (flp->type == SDLA_S502A)
1457                                 goto fail;
1458                         break;
1459
1460                 default:
1461                         goto fail;
1462         }
1463
1464         err = -EAGAIN;
1465         if (request_irq(dev->irq, &sdla_isr, 0, dev->name, dev))
1466                 goto fail;
1467
1468         if (flp->type == SDLA_S507) {
1469                 switch(dev->irq) {
1470                         case 3:
1471                                 flp->state = SDLA_S507_IRQ3;
1472                                 break;
1473                         case 4:
1474                                 flp->state = SDLA_S507_IRQ4;
1475                                 break;
1476                         case 5:
1477                                 flp->state = SDLA_S507_IRQ5;
1478                                 break;
1479                         case 7:
1480                                 flp->state = SDLA_S507_IRQ7;
1481                                 break;
1482                         case 10:
1483                                 flp->state = SDLA_S507_IRQ10;
1484                                 break;
1485                         case 11:
1486                                 flp->state = SDLA_S507_IRQ11;
1487                                 break;
1488                         case 12:
1489                                 flp->state = SDLA_S507_IRQ12;
1490                                 break;
1491                         case 15:
1492                                 flp->state = SDLA_S507_IRQ15;
1493                                 break;
1494                 }
1495         }
1496
1497         for(i=0;i < sizeof(valid_mem) / sizeof (int) ; i++)
1498                 if (valid_mem[i] == map->mem_start)
1499                         break;
1500
1501         err = -EINVAL;
1502         if (i == sizeof(valid_mem) / sizeof(int))
1503                 goto fail2;
1504
1505         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1506                 goto fail2;
1507
1508         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1509                 goto fail2;
1510
1511         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1512                 goto fail2;
1513
1514         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1515         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1516         switch(flp->type) {
1517                 case SDLA_S502A:
1518                 case SDLA_S502E:
1519                         switch (map->mem_start >> 16) {
1520                                 case 0x0A:
1521                                         byte |= SDLA_S502_SEG_A;
1522                                         break;
1523                                 case 0x0C:
1524                                         byte |= SDLA_S502_SEG_C;
1525                                         break;
1526                                 case 0x0D:
1527                                         byte |= SDLA_S502_SEG_D;
1528                                         break;
1529                                 case 0x0E:
1530                                         byte |= SDLA_S502_SEG_E;
1531                                         break;
1532                         }
1533                         break;
1534                 case SDLA_S507:
1535                         switch (map->mem_start >> 16) {
1536                                 case 0x0A:
1537                                         byte |= SDLA_S507_SEG_A;
1538                                         break;
1539                                 case 0x0B:
1540                                         byte |= SDLA_S507_SEG_B;
1541                                         break;
1542                                 case 0x0C:
1543                                         byte |= SDLA_S507_SEG_C;
1544                                         break;
1545                                 case 0x0E:
1546                                         byte |= SDLA_S507_SEG_E;
1547                                         break;
1548                         }
1549                         break;
1550                 case SDLA_S508:
1551                         switch (map->mem_start >> 16) {
1552                                 case 0x0A:
1553                                         byte |= SDLA_S508_SEG_A;
1554                                         break;
1555                                 case 0x0C:
1556                                         byte |= SDLA_S508_SEG_C;
1557                                         break;
1558                                 case 0x0D:
1559                                         byte |= SDLA_S508_SEG_D;
1560                                         break;
1561                                 case 0x0E:
1562                                         byte |= SDLA_S508_SEG_E;
1563                                         break;
1564                         }
1565                         break;
1566         }
1567
1568         /* set the memory bits, and enable access */
1569         outb(byte, base + SDLA_REG_PC_WINDOW);
1570
1571         switch(flp->type)
1572         {
1573                 case SDLA_S502E:
1574                         flp->state = SDLA_S502E_ENABLE;
1575                         break;
1576                 case SDLA_S507:
1577                         flp->state |= SDLA_MEMEN;
1578                         break;
1579                 case SDLA_S508:
1580                         flp->state = SDLA_MEMEN;
1581                         break;
1582         }
1583         outb(flp->state, base + SDLA_REG_CONTROL);
1584
1585         dev->irq = map->irq;
1586         dev->base_addr = base;
1587         dev->mem_start = map->mem_start;
1588         dev->mem_end = dev->mem_start + 0x2000;
1589         flp->initialized = 1;
1590         return 0;
1591
1592 fail2:
1593         free_irq(map->irq, dev);
1594 fail:
1595         release_region(base, SDLA_IO_EXTENTS);
1596         return err;
1597 }
1598
1599 static struct net_device_stats *sdla_stats(struct net_device *dev)
1600 {
1601         struct frad_local *flp;
1602         flp = dev->priv;
1603
1604         return(&flp->stats);
1605 }
1606
1607 static void setup_sdla(struct net_device *dev)
1608 {
1609         struct frad_local *flp = dev->priv;
1610
1611         netdev_boot_setup_check(dev);
1612
1613         SET_MODULE_OWNER(dev);
1614         dev->flags              = 0;
1615         dev->type               = 0xFFFF;
1616         dev->hard_header_len    = 0;
1617         dev->addr_len           = 0;
1618         dev->mtu                = SDLA_MAX_MTU;
1619
1620         dev->open               = sdla_open;
1621         dev->stop               = sdla_close;
1622         dev->do_ioctl           = sdla_ioctl;
1623         dev->set_config         = sdla_set_config;
1624         dev->get_stats          = sdla_stats;
1625         dev->hard_start_xmit    = sdla_transmit;
1626         dev->change_mtu         = sdla_change_mtu;
1627
1628         flp->activate           = sdla_activate;
1629         flp->deactivate         = sdla_deactivate;
1630         flp->assoc              = sdla_assoc;
1631         flp->deassoc            = sdla_deassoc;
1632         flp->dlci_conf          = sdla_dlci_conf;
1633
1634         init_timer(&flp->timer);
1635         flp->timer.expires      = 1;
1636         flp->timer.data         = (unsigned long) dev;
1637         flp->timer.function     = sdla_poll;
1638 }
1639
1640 static struct net_device *sdla;
1641
1642 static int __init init_sdla(void)
1643 {
1644         int err;
1645
1646         printk("%s.\n", version);
1647
1648         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
1649         if (!sdla)
1650                 return -ENOMEM;
1651
1652         err = register_netdev(sdla);
1653         if (err)
1654                 free_netdev(sdla);
1655
1656         return err;
1657 }
1658
1659 static void __exit exit_sdla(void)
1660 {
1661         struct frad_local *flp = sdla->priv;
1662
1663         unregister_netdev(sdla);
1664         if (flp->initialized) {
1665                 free_irq(sdla->irq, sdla);
1666                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1667         }
1668         del_timer_sync(&flp->timer);
1669         free_netdev(sdla);
1670 }
1671
1672 MODULE_LICENSE("GPL");
1673
1674 module_init(init_sdla);
1675 module_exit(exit_sdla);