git.oblomov.eu Git - linux-2.6/blob - 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/config.h> /* for CONFIG_DLCI_MAX */
  36 #include <linux/module.h>
  37 #include <linux/kernel.h>
  38 #include <linux/types.h>
  39 #include <linux/fcntl.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/ptrace.h>
  42 #include <linux/ioport.h>
  43 #include <linux/in.h>
  44 #include <linux/slab.h>
  45 #include <linux/string.h>
  46 #include <linux/timer.h>
  47 #include <linux/errno.h>
  48 #include <linux/init.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/skbuff.h>
  51 #include <linux/if_arp.h>
  52 #include <linux/if_frad.h>
  53 #include <linux/sdla.h>
  54 #include <linux/bitops.h>
  55
  56 #include <asm/system.h>
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/uaccess.h>
  60
  61 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
  62
  63 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
  64
  65 static unsigned int valid_mem[] = {
  66                                     0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
  67                                     0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
  68                                     0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
  69                                     0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
  70                                     0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000};
  71
  72 static DEFINE_SPINLOCK(sdla_lock);
  73
  74 /*********************************************************
  75  *
  76  * these are the core routines that access the card itself
  77  *
  78  *********************************************************/
  79
  80 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
  81
  82 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
  83 {
  84         char          *temp;
  85         const void    *base;
  86         int           offset, bytes;
  87
  88         temp = buf;
  89         while(len)
  90         {
  91                 offset = addr & SDLA_ADDR_MASK;
  92                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
  93                 base = (const void *) (dev->mem_start + offset);
  94
  95                 SDLA_WINDOW(dev, addr);
  96                 memcpy(temp, base, bytes);
  97
  98                 addr += bytes;
  99                 temp += bytes;
 100                 len  -= bytes;
 101         }
 102 }
 103
 104 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
 105 {
 106         unsigned long flags;
 107         spin_lock_irqsave(&sdla_lock, flags);
 108         __sdla_read(dev, addr, buf, len);
 109         spin_unlock_irqrestore(&sdla_lock, flags);
 110 }
 111
 112 static void __sdla_write(struct net_device *dev, int addr,
 113                          const void *buf, short len)
 114 {
 115         const char    *temp;
 116         void          *base;
 117         int           offset, bytes;
 118
 119         temp = buf;
 120         while(len)
 121         {
 122                 offset = addr & SDLA_ADDR_MASK;
 123                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
 124                 base = (void *) (dev->mem_start + offset);
 125
 126                 SDLA_WINDOW(dev, addr);
 127                 memcpy(base, temp, bytes);
 128
 129                 addr += bytes;
 130                 temp += bytes;
 131                 len  -= bytes;
 132         }
 133 }
 134
 135 static void sdla_write(struct net_device *dev, int addr,
 136                        const void *buf, short len)
 137 {
 138         unsigned long flags;
 139
 140         spin_lock_irqsave(&sdla_lock, flags);
 141         __sdla_write(dev, addr, buf, len);
 142         spin_unlock_irqrestore(&sdla_lock, flags);
 143 }
 144
 145
 146 static void sdla_clear(struct net_device *dev)
 147 {
 148         unsigned long flags;
 149         char          *base;
 150         int           len, addr, bytes;
 151
 152         len = 65536;
 153         addr = 0;
 154         bytes = SDLA_WINDOW_SIZE;
 155         base = (void *) dev->mem_start;
 156
 157         spin_lock_irqsave(&sdla_lock, flags);
 158         while(len)
 159         {
 160                 SDLA_WINDOW(dev, addr);
 161                 memset(base, 0, bytes);
 162
 163                 addr += bytes;
 164                 len  -= bytes;
 165         }
 166         spin_unlock_irqrestore(&sdla_lock, flags);
 167
 168 }
 169
 170 static char sdla_byte(struct net_device *dev, int addr)
 171 {
 172         unsigned long flags;
 173         char          byte, *temp;
 174
 175         temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
 176
 177         spin_lock_irqsave(&sdla_lock, flags);
 178         SDLA_WINDOW(dev, addr);
 179         byte = *temp;
 180         spin_unlock_irqrestore(&sdla_lock, flags);
 181
 182         return(byte);
 183 }
 184
 185 static void sdla_stop(struct net_device *dev)
 186 {
 187         struct frad_local *flp;
 188
 189         flp = dev->priv;
 190         switch(flp->type)
 191         {
 192                 case SDLA_S502A:
 193                         outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
 194                         flp->state = SDLA_HALT;
 195                         break;
 196                 case SDLA_S502E:
 197                         outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
 198                         outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
 199                         flp->state = SDLA_S502E_ENABLE;
 200                         break;
 201                 case SDLA_S507:
 202                         flp->state &= ~SDLA_CPUEN;
 203                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 204                         break;
 205                 case SDLA_S508:
 206                         flp->state &= ~SDLA_CPUEN;
 207                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 208                         break;
 209         }
 210 }
 211
 212 static void sdla_start(struct net_device *dev)
 213 {
 214         struct frad_local *flp;
 215
 216         flp = dev->priv;
 217         switch(flp->type)
 218         {
 219                 case SDLA_S502A:
 220                         outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
 221                         outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
 222                         flp->state = SDLA_S502A_START;
 223                         break;
 224                 case SDLA_S502E:
 225                         outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
 226                         outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
 227                         flp->state = 0;
 228                         break;
 229                 case SDLA_S507:
 230                         flp->state |= SDLA_CPUEN;
 231                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 232                         break;
 233                 case SDLA_S508:
 234                         flp->state |= SDLA_CPUEN;
 235                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 236                         break;
 237         }
 238 }
 239
 240 /****************************************************
 241  *
 242  * this is used for the S502A/E cards to determine
 243  * the speed of the onboard CPU.  Calibration is
 244  * necessary for the Frame Relay code uploaded
 245  * later.  Incorrect results cause timing problems
 246  * with link checks & status messages
 247  *
 248  ***************************************************/
 249
 250 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
 251 {
 252         unsigned long start, done, now;
 253         char          resp, *temp;
 254
 255         start = now = jiffies;
 256         done = jiffies + jiffs;
 257
 258         temp = (void *)dev->mem_start;
 259         temp += z80_addr & SDLA_ADDR_MASK;
 260
 261         resp = ~resp1;
 262         while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
 263         {
 264                 if (jiffies != now)
 265                 {
 266                         SDLA_WINDOW(dev, z80_addr);
 267                         now = jiffies;
 268                         resp = *temp;
 269                 }
 270         }
 271         return(time_before(jiffies, done) ? jiffies - start : -1);
 272 }
 273
 274 /* constants for Z80 CPU speed */
 275 #define Z80_READY               '1'     /* Z80 is ready to begin */
 276 #define LOADER_READY            '2'     /* driver is ready to begin */
 277 #define Z80_SCC_OK              '3'     /* SCC is on board */
 278 #define Z80_SCC_BAD             '4'     /* SCC was not found */
 279
 280 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
 281 {
 282         int  jiffs;
 283         char data;
 284
 285         sdla_start(dev);
 286         if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
 287                 return(-EIO);
 288
 289         data = LOADER_READY;
 290         sdla_write(dev, 0, &data, 1);
 291
 292         if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
 293                 return(-EIO);
 294
 295         sdla_stop(dev);
 296         sdla_read(dev, 0, &data, 1);
 297
 298         if (data == Z80_SCC_BAD)
 299         {
 300                 printk("%s: SCC bad\n", dev->name);
 301                 return(-EIO);
 302         }
 303
 304         if (data != Z80_SCC_OK)
 305                 return(-EINVAL);
 306
 307         if (jiffs < 165)
 308                 ifr->ifr_mtu = SDLA_CPU_16M;
 309         else if (jiffs < 220)
 310                 ifr->ifr_mtu = SDLA_CPU_10M;
 311         else if (jiffs < 258)
 312                 ifr->ifr_mtu = SDLA_CPU_8M;
 313         else if (jiffs < 357)
 314                 ifr->ifr_mtu = SDLA_CPU_7M;
 315         else if (jiffs < 467)
 316                 ifr->ifr_mtu = SDLA_CPU_5M;
 317         else
 318                 ifr->ifr_mtu = SDLA_CPU_3M;
 319
 320         return(0);
 321 }
 322
 323 /************************************************
 324  *
 325  *  Direct interaction with the Frame Relay code
 326  *  starts here.
 327  *
 328  ************************************************/
 329
 330 struct _dlci_stat
 331 {
 332         short dlci;
 333         char  flags;
 334 } __attribute__((packed));
 335
 336 struct _frad_stat
 337 {
 338         char    flags;
 339         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 340 };
 341
 342 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
 343 {
 344         struct _dlci_stat *pstatus;
 345         short             *pdlci;
 346         int               i;
 347         char              *state, line[30];
 348
 349         switch (ret)
 350         {
 351                 case SDLA_RET_MODEM:
 352                         state = data;
 353                         if (*state & SDLA_MODEM_DCD_LOW)
 354                                 printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
 355                         if (*state & SDLA_MODEM_CTS_LOW)
 356                                 printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
 357                         /* I should probably do something about this! */
 358                         break;
 359
 360                 case SDLA_RET_CHANNEL_OFF:
 361                         printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
 362                         /* same here */
 363                         break;
 364
 365                 case SDLA_RET_CHANNEL_ON:
 366                         printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
 367                         /* same here */
 368                         break;
 369
 370                 case SDLA_RET_DLCI_STATUS:
 371                         printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
 372                         len /= sizeof(struct _dlci_stat);
 373                         for(pstatus = data, i=0;i < len;i++,pstatus++)
 374                         {
 375                                 if (pstatus->flags & SDLA_DLCI_NEW)
 376                                         state = "new";
 377                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
 378                                         state = "deleted";
 379                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
 380                                         state = "active";
 381                                 else
 382                                 {
 383                                         sprintf(line, "unknown status: %02X", pstatus->flags);
 384                                         state = line;
 385                                 }
 386                                 printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
 387                                 /* same here */
 388                         }
 389                         break;
 390
 391                 case SDLA_RET_DLCI_UNKNOWN:
 392                         printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
 393                         len /= sizeof(short);
 394                         for(pdlci = data,i=0;i < len;i++,pdlci++)
 395                                 printk(" %i", *pdlci);
 396                         printk("\n");
 397                         break;
 398
 399                 case SDLA_RET_TIMEOUT:
 400                         printk(KERN_ERR "%s: Command timed out!\n", dev->name);
 401                         break;
 402
 403                 case SDLA_RET_BUF_OVERSIZE:
 404                         printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
 405                         break;
 406
 407                 case SDLA_RET_BUF_TOO_BIG:
 408                         printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
 409                         break;
 410
 411                 case SDLA_RET_CHANNEL_INACTIVE:
 412                 case SDLA_RET_DLCI_INACTIVE:
 413                 case SDLA_RET_CIR_OVERFLOW:
 414                 case SDLA_RET_NO_BUFS:
 415                         if (cmd == SDLA_INFORMATION_WRITE)
 416                                 break;
 417
 418                 default:
 419                         printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
 420                         /* Further processing could be done here */
 421                         break;
 422         }
 423 }
 424
 425 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
 426                         void *inbuf, short inlen, void *outbuf, short *outlen)
 427 {
 428         static struct _frad_stat status;
 429         struct frad_local        *flp;
 430         struct sdla_cmd          *cmd_buf;
 431         unsigned long            pflags;
 432         unsigned long            jiffs;
 433         int                      ret, waiting, len;
 434         long                     window;
 435
 436         flp = dev->priv;
 437         window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
 438         cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
 439         ret = 0;
 440         len = 0;
 441         jiffs = jiffies + HZ;  /* 1 second is plenty */
 442
 443         spin_lock_irqsave(&sdla_lock, pflags);
 444         SDLA_WINDOW(dev, window);
 445         cmd_buf->cmd = cmd;
 446         cmd_buf->dlci = dlci;
 447         cmd_buf->flags = flags;
 448
 449         if (inbuf)
 450                 memcpy(cmd_buf->data, inbuf, inlen);
 451
 452         cmd_buf->length = inlen;
 453
 454         cmd_buf->opp_flag = 1;
 455         spin_unlock_irqrestore(&sdla_lock, pflags);
 456
 457         waiting = 1;
 458         len = 0;
 459         while (waiting && time_before_eq(jiffies, jiffs))
 460         {
 461                 if (waiting++ % 3)
 462                 {
 463                         spin_lock_irqsave(&sdla_lock, pflags);
 464                         SDLA_WINDOW(dev, window);
 465                         waiting = ((volatile int)(cmd_buf->opp_flag));
 466                         spin_unlock_irqrestore(&sdla_lock, pflags);
 467                 }
 468         }
 469
 470         if (!waiting)
 471         {
 472
 473                 spin_lock_irqsave(&sdla_lock, pflags);
 474                 SDLA_WINDOW(dev, window);
 475                 ret = cmd_buf->retval;
 476                 len = cmd_buf->length;
 477                 if (outbuf && outlen)
 478                 {
 479                         *outlen = *outlen >= len ? len : *outlen;
 480
 481                         if (*outlen)
 482                                 memcpy(outbuf, cmd_buf->data, *outlen);
 483                 }
 484
 485                 /* This is a local copy that's used for error handling */
 486                 if (ret)
 487                         memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
 488
 489                 spin_unlock_irqrestore(&sdla_lock, pflags);
 490         }
 491         else
 492                 ret = SDLA_RET_TIMEOUT;
 493
 494         if (ret != SDLA_RET_OK)
 495                 sdla_errors(dev, cmd, dlci, ret, len, &status);
 496
 497         return(ret);
 498 }
 499
 500 /***********************************************
 501  *
 502  * these functions are called by the DLCI driver
 503  *
 504  ***********************************************/
 505
 506 static int sdla_reconfig(struct net_device *dev);
 507
 508 static int sdla_activate(struct net_device *slave, struct net_device *master)
 509 {
 510         struct frad_local *flp;
 511         int i;
 512
 513         flp = slave->priv;
 514
 515         for(i=0;i<CONFIG_DLCI_MAX;i++)
 516                 if (flp->master[i] == master)
 517                         break;
 518
 519         if (i == CONFIG_DLCI_MAX)
 520                 return(-ENODEV);
 521
 522         flp->dlci[i] = abs(flp->dlci[i]);
 523
 524         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 525                 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 526
 527         return(0);
 528 }
 529
 530 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
 531 {
 532         struct frad_local *flp;
 533         int               i;
 534
 535         flp = slave->priv;
 536
 537         for(i=0;i<CONFIG_DLCI_MAX;i++)
 538                 if (flp->master[i] == master)
 539                         break;
 540
 541         if (i == CONFIG_DLCI_MAX)
 542                 return(-ENODEV);
 543
 544         flp->dlci[i] = -abs(flp->dlci[i]);
 545
 546         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 547                 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 548
 549         return(0);
 550 }
 551
 552 static int sdla_assoc(struct net_device *slave, struct net_device *master)
 553 {
 554         struct frad_local *flp;
 555         int               i;
 556
 557         if (master->type != ARPHRD_DLCI)
 558                 return(-EINVAL);
 559
 560         flp = slave->priv;
 561
 562         for(i=0;i<CONFIG_DLCI_MAX;i++)
 563         {
 564                 if (!flp->master[i])
 565                         break;
 566                 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
 567                         return(-EADDRINUSE);
 568         }
 569
 570         if (i == CONFIG_DLCI_MAX)
 571                 return(-EMLINK);  /* #### Alan: Comments on this ?? */
 572
 573
 574         flp->master[i] = master;
 575         flp->dlci[i] = -*(short *)(master->dev_addr);
 576         master->mtu = slave->mtu;
 577
 578         if (netif_running(slave)) {
 579                 if (flp->config.station == FRAD_STATION_CPE)
 580                         sdla_reconfig(slave);
 581                 else
 582                         sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 583         }
 584
 585         return(0);
 586 }
 587
 588 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
 589 {
 590         struct frad_local *flp;
 591         int               i;
 592
 593         flp = slave->priv;
 594
 595         for(i=0;i<CONFIG_DLCI_MAX;i++)
 596                 if (flp->master[i] == master)
 597                         break;
 598
 599         if (i == CONFIG_DLCI_MAX)
 600                 return(-ENODEV);
 601
 602         flp->master[i] = NULL;
 603         flp->dlci[i] = 0;
 604
 605
 606         if (netif_running(slave)) {
 607                 if (flp->config.station == FRAD_STATION_CPE)
 608                         sdla_reconfig(slave);
 609                 else
 610                         sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 611         }
 612
 613         return(0);
 614 }
 615
 616 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
 617 {
 618         struct frad_local *flp;
 619         struct dlci_local *dlp;
 620         int               i;
 621         short             len, ret;
 622
 623         flp = slave->priv;
 624
 625         for(i=0;i<CONFIG_DLCI_MAX;i++)
 626                 if (flp->master[i] == master)
 627                         break;
 628
 629         if (i == CONFIG_DLCI_MAX)
 630                 return(-ENODEV);
 631
 632         dlp = master->priv;
 633
 634         ret = SDLA_RET_OK;
 635         len = sizeof(struct dlci_conf);
 636         if (netif_running(slave)) {
 637                 if (get)
 638                         ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 639                                     NULL, 0, &dlp->config, &len);
 640                 else
 641                         ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 642                                     &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
 643         }
 644
 645         return(ret == SDLA_RET_OK ? 0 : -EIO);
 646 }
 647
 648 /**************************
 649  *
 650  * now for the Linux driver
 651  *
 652  **************************/
 653
 654 /* NOTE: the DLCI driver deals with freeing the SKB!! */
 655 static int sdla_transmit(struct sk_buff *skb, struct net_device *dev)
 656 {
 657         struct frad_local *flp;
 658         int               ret, addr, accept, i;
 659         short             size;
 660         unsigned long     flags;
 661         struct buf_entry  *pbuf;
 662
 663         flp = dev->priv;
 664         ret = 0;
 665         accept = 1;
 666
 667         netif_stop_queue(dev);
 668
 669         /*
 670          * stupid GateD insists on setting up the multicast router thru us
 671          * and we're ill equipped to handle a non Frame Relay packet at this
 672          * time!
 673          */
 674
 675         accept = 1;
 676         switch (dev->type)
 677         {
 678                 case ARPHRD_FRAD:
 679                         if (skb->dev->type != ARPHRD_DLCI)
 680                         {
 681                                 printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
 682                                 accept = 0;
 683                         }
 684                         break;
 685                 default:
 686                         printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
 687                         accept = 0;
 688                         break;
 689         }
 690         if (accept)
 691         {
 692                 /* this is frame specific, but till there's a PPP module, it's the default */
 693                 switch (flp->type)
 694                 {
 695                         case SDLA_S502A:
 696                         case SDLA_S502E:
 697                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 698                                 break;
 699                                 case SDLA_S508:
 700                                 size = sizeof(addr);
 701                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 702                                 if (ret == SDLA_RET_OK)
 703                                 {
 704
 705                                         spin_lock_irqsave(&sdla_lock, flags);
 706                                         SDLA_WINDOW(dev, addr);
 707                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 708                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 709                                         SDLA_WINDOW(dev, addr);
 710                                         pbuf->opp_flag = 1;
 711                                         spin_unlock_irqrestore(&sdla_lock, flags);
 712                                 }
 713                                 break;
 714                 }
 715                 switch (ret)
 716                 {
 717                         case SDLA_RET_OK:
 718                                 flp->stats.tx_packets++;
 719                                 ret = DLCI_RET_OK;
 720                                 break;
 721
 722                         case SDLA_RET_CIR_OVERFLOW:
 723                         case SDLA_RET_BUF_OVERSIZE:
 724                         case SDLA_RET_NO_BUFS:
 725                                 flp->stats.tx_dropped++;
 726                                 ret = DLCI_RET_DROP;
 727                                 break;
 728
 729                         default:
 730                                 flp->stats.tx_errors++;
 731                                 ret = DLCI_RET_ERR;
 732                                 break;
 733                 }
 734         }
 735         netif_wake_queue(dev);
 736         for(i=0;i<CONFIG_DLCI_MAX;i++)
 737         {
 738                 if(flp->master[i]!=NULL)
 739                         netif_wake_queue(flp->master[i]);
 740         }
 741         return(ret);
 742 }
 743
 744 static void sdla_receive(struct net_device *dev)
 745 {
 746         struct net_device         *master;
 747         struct frad_local *flp;
 748         struct dlci_local *dlp;
 749         struct sk_buff   *skb;
 750
 751         struct sdla_cmd *cmd;
 752         struct buf_info *pbufi;
 753         struct buf_entry  *pbuf;
 754
 755         unsigned long     flags;
 756         int               i=0, received, success, addr, buf_base, buf_top;
 757         short             dlci, len, len2, split;
 758
 759         flp = dev->priv;
 760         success = 1;
 761         received = addr = buf_top = buf_base = 0;
 762         len = dlci = 0;
 763         skb = NULL;
 764         master = NULL;
 765         cmd = NULL;
 766         pbufi = NULL;
 767         pbuf = NULL;
 768
 769         spin_lock_irqsave(&sdla_lock, flags);
 770
 771         switch (flp->type)
 772         {
 773                 case SDLA_S502A:
 774                 case SDLA_S502E:
 775                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 776                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 777                         success = cmd->opp_flag;
 778                         if (!success)
 779                                 break;
 780
 781                         dlci = cmd->dlci;
 782                         len = cmd->length;
 783                         break;
 784
 785                 case SDLA_S508:
 786                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 787                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 788                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 789                         success = pbuf->opp_flag;
 790                         if (!success)
 791                                 break;
 792
 793                         buf_top = pbufi->buf_top;
 794                         buf_base = pbufi->buf_base;
 795                         dlci = pbuf->dlci;
 796                         len = pbuf->length;
 797                         addr = pbuf->buf_addr;
 798                         break;
 799         }
 800
 801         /* common code, find the DLCI and get the SKB */
 802         if (success)
 803         {
 804                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 805                         if (flp->dlci[i] == dlci)
 806                                 break;
 807
 808                 if (i == CONFIG_DLCI_MAX)
 809                 {
 810                         printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
 811                         flp->stats.rx_errors++;
 812                         success = 0;
 813                 }
 814         }
 815
 816         if (success)
 817         {
 818                 master = flp->master[i];
 819                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 820                 if (skb == NULL)
 821                 {
 822                         printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 823                         flp->stats.rx_dropped++;
 824                         success = 0;
 825                 }
 826                 else
 827                         skb_reserve(skb, sizeof(struct frhdr));
 828         }
 829
 830         /* pick up the data */
 831         switch (flp->type)
 832         {
 833                 case SDLA_S502A:
 834                 case SDLA_S502E:
 835                         if (success)
 836                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 837
 838                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 839                         cmd->opp_flag = 0;
 840                         break;
 841
 842                 case SDLA_S508:
 843                         if (success)
 844                         {
 845                                 /* is this buffer split off the end of the internal ring buffer */
 846                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 847                                 len2 = len - split;
 848
 849                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 850                                 if (split)
 851                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 852                         }
 853
 854                         /* increment the buffer we're looking at */
 855                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 856                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 857                         pbuf->opp_flag = 0;
 858                         break;
 859         }
 860
 861         if (success)
 862         {
 863                 flp->stats.rx_packets++;
 864                 dlp = master->priv;
 865                 (*dlp->receive)(skb, master);
 866         }
 867
 868         spin_unlock_irqrestore(&sdla_lock, flags);
 869 }
 870
 871 static irqreturn_t sdla_isr(int irq, void *dev_id, struct pt_regs * regs)
 872 {
 873         struct net_device     *dev;
 874         struct frad_local *flp;
 875         char              byte;
 876
 877         dev = dev_id;
 878
 879         if (dev == NULL)
 880         {
 881                 printk(KERN_WARNING "sdla_isr(): irq %d for unknown device.\n", irq);
 882                 return IRQ_NONE;
 883         }
 884
 885         flp = dev->priv;
 886
 887         if (!flp->initialized)
 888         {
 889                 printk(KERN_WARNING "%s: irq %d for uninitialized device.\n", dev->name, irq);
 890                 return IRQ_NONE;
 891         }
 892
 893         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 894         switch (byte)
 895         {
 896                 case SDLA_INTR_RX:
 897                         sdla_receive(dev);
 898                         break;
 899
 900                 /* the command will get an error return, which is processed above */
 901                 case SDLA_INTR_MODEM:
 902                 case SDLA_INTR_STATUS:
 903                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 904                         break;
 905
 906                 case SDLA_INTR_TX:
 907                 case SDLA_INTR_COMPLETE:
 908                 case SDLA_INTR_TIMER:
 909                         printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
 910                         break;
 911         }
 912
 913         /* the S502E requires a manual acknowledgement of the interrupt */
 914         if (flp->type == SDLA_S502E)
 915         {
 916                 flp->state &= ~SDLA_S502E_INTACK;
 917                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 918                 flp->state |= SDLA_S502E_INTACK;
 919                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 920         }
 921
 922         /* this clears the byte, informing the Z80 we're done */
 923         byte = 0;
 924         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 925         return IRQ_HANDLED;
 926 }
 927
 928 static void sdla_poll(unsigned long device)
 929 {
 930         struct net_device         *dev;
 931         struct frad_local *flp;
 932
 933         dev = (struct net_device *) device;
 934         flp = dev->priv;
 935
 936         if (sdla_byte(dev, SDLA_502_RCV_BUF))
 937                 sdla_receive(dev);
 938
 939         flp->timer.expires = 1;
 940         add_timer(&flp->timer);
 941 }
 942
 943 static int sdla_close(struct net_device *dev)
 944 {
 945         struct frad_local *flp;
 946         struct intr_info  intr;
 947         int               len, i;
 948         short             dlcis[CONFIG_DLCI_MAX];
 949
 950         flp = dev->priv;
 951
 952         len = 0;
 953         for(i=0;i<CONFIG_DLCI_MAX;i++)
 954                 if (flp->dlci[i])
 955                         dlcis[len++] = abs(flp->dlci[i]);
 956         len *= 2;
 957
 958         if (flp->config.station == FRAD_STATION_NODE)
 959         {
 960                 for(i=0;i<CONFIG_DLCI_MAX;i++)
 961                         if (flp->dlci[i] > 0)
 962                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 963                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 964         }
 965
 966         memset(&intr, 0, sizeof(intr));
 967         /* let's start up the reception */
 968         switch(flp->type)
 969         {
 970                 case SDLA_S502A:
 971                         del_timer(&flp->timer);
 972                         break;
 973
 974                 case SDLA_S502E:
 975                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 976                         flp->state &= ~SDLA_S502E_INTACK;
 977                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 978                         break;
 979
 980                 case SDLA_S507:
 981                         break;
 982
 983                 case SDLA_S508:
 984                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 985                         flp->state &= ~SDLA_S508_INTEN;
 986                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 987                         break;
 988         }
 989
 990         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 991
 992         netif_stop_queue(dev);
 993
 994         return(0);
 995 }
 996
 997 struct conf_data {
 998         struct frad_conf config;
 999         short            dlci[CONFIG_DLCI_MAX];
1000 };
1001
1002 static int sdla_open(struct net_device *dev)
1003 {
1004         struct frad_local *flp;
1005         struct dlci_local *dlp;
1006         struct conf_data  data;
1007         struct intr_info  intr;
1008         int               len, i;
1009         char              byte;
1010
1011         flp = dev->priv;
1012
1013         if (!flp->initialized)
1014                 return(-EPERM);
1015
1016         if (!flp->configured)
1017                 return(-EPERM);
1018
1019         /* time to send in the configuration */
1020         len = 0;
1021         for(i=0;i<CONFIG_DLCI_MAX;i++)
1022                 if (flp->dlci[i])
1023                         data.dlci[len++] = abs(flp->dlci[i]);
1024         len *= 2;
1025
1026         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1027         len += sizeof(struct frad_conf);
1028
1029         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1030         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1031
1032         if (flp->type == SDLA_S508)
1033                 flp->buffer = 0;
1034
1035         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1036
1037         /* let's start up the reception */
1038         memset(&intr, 0, sizeof(intr));
1039         switch(flp->type)
1040         {
1041                 case SDLA_S502A:
1042                         flp->timer.expires = 1;
1043                         add_timer(&flp->timer);
1044                         break;
1045
1046                 case SDLA_S502E:
1047                         flp->state |= SDLA_S502E_ENABLE;
1048                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1049                         flp->state |= SDLA_S502E_INTACK;
1050                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1051                         byte = 0;
1052                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1053                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1054                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1055                         break;
1056
1057                 case SDLA_S507:
1058                         break;
1059
1060                 case SDLA_S508:
1061                         flp->state |= SDLA_S508_INTEN;
1062                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1063                         byte = 0;
1064                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1065                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1066                         intr.irq = dev->irq;
1067                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1068                         break;
1069         }
1070
1071         if (flp->config.station == FRAD_STATION_CPE)
1072         {
1073                 byte = SDLA_ICS_STATUS_ENQ;
1074                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1075         }
1076         else
1077         {
1078                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1079                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1080                         if (flp->dlci[i] > 0)
1081                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1082         }
1083
1084         /* configure any specific DLCI settings */
1085         for(i=0;i<CONFIG_DLCI_MAX;i++)
1086                 if (flp->dlci[i])
1087                 {
1088                         dlp = flp->master[i]->priv;
1089                         if (dlp->configured)
1090                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1091                 }
1092
1093         netif_start_queue(dev);
1094
1095         return(0);
1096 }
1097
1098 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1099 {
1100         struct frad_local *flp;
1101         struct conf_data  data;
1102         int               i;
1103         short             size;
1104
1105         if (dev->type == 0xFFFF)
1106                 return(-EUNATCH);
1107
1108         flp = dev->priv;
1109
1110         if (!get)
1111         {
1112                 if (netif_running(dev))
1113                         return(-EBUSY);
1114
1115                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1116                         return -EFAULT;
1117
1118                 if (data.config.station & ~FRAD_STATION_NODE)
1119                         return(-EINVAL);
1120
1121                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1122                         return(-EINVAL);
1123
1124                 if ((data.config.kbaud < 0) ||
1125                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1126                         return(-EINVAL);
1127
1128                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1129                         return(-EINVAL);
1130
1131                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1132                         return(-EINVAL);
1133
1134                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1135                         return(-EINVAL);
1136
1137                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1138                         return(-EINVAL);
1139
1140                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1141                         return(-EINVAL);
1142
1143                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1144                         return(-EINVAL);
1145
1146                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1147                         return(-EINVAL);
1148
1149                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1150                 flp->config.flags |= SDLA_DIRECT_RECV;
1151
1152                 if (flp->type == SDLA_S508)
1153                         flp->config.flags |= SDLA_TX70_RX30;
1154
1155                 if (dev->mtu != flp->config.mtu)
1156                 {
1157                         /* this is required to change the MTU */
1158                         dev->mtu = flp->config.mtu;
1159                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1160                                 if (flp->master[i])
1161                                         flp->master[i]->mtu = flp->config.mtu;
1162                 }
1163
1164                 flp->config.mtu += sizeof(struct frhdr);
1165
1166                 /* off to the races! */
1167                 if (!flp->configured)
1168                         sdla_start(dev);
1169
1170                 flp->configured = 1;
1171         }
1172         else
1173         {
1174                 /* no sense reading if the CPU isn't started */
1175                 if (netif_running(dev))
1176                 {
1177                         size = sizeof(data);
1178                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1179                                 return(-EIO);
1180                 }
1181                 else
1182                         if (flp->configured)
1183                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1184                         else
1185                                 memset(&data.config, 0, sizeof(struct frad_conf));
1186
1187                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1188                 data.config.flags &= FRAD_VALID_FLAGS;
1189                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1190                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1191         }
1192
1193         return(0);
1194 }
1195
1196 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1197 {
1198         struct sdla_mem mem;
1199         char    *temp;
1200
1201         if(copy_from_user(&mem, info, sizeof(mem)))
1202                 return -EFAULT;
1203
1204         if (read)
1205         {
1206                 temp = kmalloc(mem.len, GFP_KERNEL);
1207                 if (!temp)
1208                         return(-ENOMEM);
1209                 memset(temp, 0, mem.len);
1210                 sdla_read(dev, mem.addr, temp, mem.len);
1211                 if(copy_to_user(mem.data, temp, mem.len))
1212                 {
1213                         kfree(temp);
1214                         return -EFAULT;
1215                 }
1216                 kfree(temp);
1217         }
1218         else
1219         {
1220                 temp = kmalloc(mem.len, GFP_KERNEL);
1221                 if (!temp)
1222                         return(-ENOMEM);
1223                 if(copy_from_user(temp, mem.data, mem.len))
1224                 {
1225                         kfree(temp);
1226                         return -EFAULT;
1227                 }
1228                 sdla_write(dev, mem.addr, temp, mem.len);
1229                 kfree(temp);
1230         }
1231         return(0);
1232 }
1233
1234 static int sdla_reconfig(struct net_device *dev)
1235 {
1236         struct frad_local *flp;
1237         struct conf_data  data;
1238         int               i, len;
1239
1240         flp = dev->priv;
1241
1242         len = 0;
1243         for(i=0;i<CONFIG_DLCI_MAX;i++)
1244                 if (flp->dlci[i])
1245                         data.dlci[len++] = flp->dlci[i];
1246         len *= 2;
1247
1248         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1249         len += sizeof(struct frad_conf);
1250
1251         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1252         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1253         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1254
1255         return(0);
1256 }
1257
1258 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1259 {
1260         struct frad_local *flp;
1261
1262         if(!capable(CAP_NET_ADMIN))
1263                 return -EPERM;
1264
1265         flp = dev->priv;
1266
1267         if (!flp->initialized)
1268                 return(-EINVAL);
1269
1270         switch (cmd)
1271         {
1272                 case FRAD_GET_CONF:
1273                 case FRAD_SET_CONF:
1274                         return(sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF));
1275
1276                 case SDLA_IDENTIFY:
1277                         ifr->ifr_flags = flp->type;
1278                         break;
1279
1280                 case SDLA_CPUSPEED:
1281                         return(sdla_cpuspeed(dev, ifr));
1282
1283 /* ==========================================================
1284 NOTE:  This is rather a useless action right now, as the
1285        current driver does not support protocols other than
1286        FR.  However, Sangoma has modules for a number of
1287        other protocols in the works.
1288 ============================================================*/
1289                 case SDLA_PROTOCOL:
1290                         if (flp->configured)
1291                                 return(-EALREADY);
1292
1293                         switch (ifr->ifr_flags)
1294                         {
1295                                 case ARPHRD_FRAD:
1296                                         dev->type = ifr->ifr_flags;
1297                                         break;
1298                                 default:
1299                                         return(-ENOPROTOOPT);
1300                         }
1301                         break;
1302
1303                 case SDLA_CLEARMEM:
1304                         sdla_clear(dev);
1305                         break;
1306
1307                 case SDLA_WRITEMEM:
1308                 case SDLA_READMEM:
1309                         if(!capable(CAP_SYS_RAWIO))
1310                                 return -EPERM;
1311                         return(sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM));
1312
1313                 case SDLA_START:
1314                         sdla_start(dev);
1315                         break;
1316
1317                 case SDLA_STOP:
1318                         sdla_stop(dev);
1319                         break;
1320
1321                 default:
1322                         return(-EOPNOTSUPP);
1323         }
1324         return(0);
1325 }
1326
1327 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1328 {
1329         struct frad_local *flp;
1330
1331         flp = dev->priv;
1332
1333         if (netif_running(dev))
1334                 return(-EBUSY);
1335
1336         /* for now, you can't change the MTU! */
1337         return(-EOPNOTSUPP);
1338 }
1339
1340 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1341 {
1342         struct frad_local *flp;
1343         int               i;
1344         char              byte;
1345         unsigned base;
1346         int err = -EINVAL;
1347
1348         flp = dev->priv;
1349
1350         if (flp->initialized)
1351                 return(-EINVAL);
1352
1353         for(i=0;i < sizeof(valid_port) / sizeof (int) ; i++)
1354                 if (valid_port[i] == map->base_addr)
1355                         break;
1356
1357         if (i == sizeof(valid_port) / sizeof(int))
1358                 return(-EINVAL);
1359
1360         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1361                 printk(KERN_WARNING "SDLA: io-port 0x%04lx in use \n", dev->base_addr);
1362                 return(-EINVAL);
1363         }
1364         base = map->base_addr;
1365
1366         /* test for card types, S502A, S502E, S507, S508                 */
1367         /* these tests shut down the card completely, so clear the state */
1368         flp->type = SDLA_UNKNOWN;
1369         flp->state = 0;
1370
1371         for(i=1;i<SDLA_IO_EXTENTS;i++)
1372                 if (inb(base + i) != 0xFF)
1373                         break;
1374
1375         if (i == SDLA_IO_EXTENTS) {
1376                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1377                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1378                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1379                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1380                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1381                                 flp->type = SDLA_S502E;
1382                                 goto got_type;
1383                         }
1384                 }
1385         }
1386
1387         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1388                 if (inb(base + i) != byte)
1389                         break;
1390
1391         if (i == SDLA_IO_EXTENTS) {
1392                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1393                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1394                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1395                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1396                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1397                                 flp->type = SDLA_S507;
1398                                 goto got_type;
1399                         }
1400                 }
1401         }
1402
1403         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1404         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1405                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1406                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1407                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1408                         flp->type = SDLA_S508;
1409                         goto got_type;
1410                 }
1411         }
1412
1413         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1414         if (inb(base + SDLA_S502_STS) == 0x40) {
1415                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1416                 if (inb(base + SDLA_S502_STS) == 0x40) {
1417                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1418                         if (inb(base + SDLA_S502_STS) == 0x44) {
1419                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1420                                 flp->type = SDLA_S502A;
1421                                 goto got_type;
1422                         }
1423                 }
1424         }
1425
1426         printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1427         err = -ENODEV;
1428         goto fail;
1429
1430 got_type:
1431         switch(base) {
1432                 case 0x270:
1433                 case 0x280:
1434                 case 0x380:
1435                 case 0x390:
1436                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1437                                 goto fail;
1438         }
1439
1440         switch (map->irq) {
1441                 case 2:
1442                         if (flp->type != SDLA_S502E)
1443                                 goto fail;
1444                         break;
1445
1446                 case 10:
1447                 case 11:
1448                 case 12:
1449                 case 15:
1450                 case 4:
1451                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1452                                 goto fail;
1453                         break;
1454                 case 3:
1455                 case 5:
1456                 case 7:
1457                         if (flp->type == SDLA_S502A)
1458                                 goto fail;
1459                         break;
1460
1461                 default:
1462                         goto fail;
1463         }
1464
1465         err = -EAGAIN;
1466         if (request_irq(dev->irq, &sdla_isr, 0, dev->name, dev))
1467                 goto fail;
1468
1469         if (flp->type == SDLA_S507) {
1470                 switch(dev->irq) {
1471                         case 3:
1472                                 flp->state = SDLA_S507_IRQ3;
1473                                 break;
1474                         case 4:
1475                                 flp->state = SDLA_S507_IRQ4;
1476                                 break;
1477                         case 5:
1478                                 flp->state = SDLA_S507_IRQ5;
1479                                 break;
1480                         case 7:
1481                                 flp->state = SDLA_S507_IRQ7;
1482                                 break;
1483                         case 10:
1484                                 flp->state = SDLA_S507_IRQ10;
1485                                 break;
1486                         case 11:
1487                                 flp->state = SDLA_S507_IRQ11;
1488                                 break;
1489                         case 12:
1490                                 flp->state = SDLA_S507_IRQ12;
1491                                 break;
1492                         case 15:
1493                                 flp->state = SDLA_S507_IRQ15;
1494                                 break;
1495                 }
1496         }
1497
1498         for(i=0;i < sizeof(valid_mem) / sizeof (int) ; i++)
1499                 if (valid_mem[i] == map->mem_start)
1500                         break;
1501
1502         err = -EINVAL;
1503         if (i == sizeof(valid_mem) / sizeof(int))
1504                 goto fail2;
1505
1506         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1507                 goto fail2;
1508
1509         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1510                 goto fail2;
1511
1512         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1513                 goto fail2;
1514
1515         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1516         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1517         switch(flp->type) {
1518                 case SDLA_S502A:
1519                 case SDLA_S502E:
1520                         switch (map->mem_start >> 16) {
1521                                 case 0x0A:
1522                                         byte |= SDLA_S502_SEG_A;
1523                                         break;
1524                                 case 0x0C:
1525                                         byte |= SDLA_S502_SEG_C;
1526                                         break;
1527                                 case 0x0D:
1528                                         byte |= SDLA_S502_SEG_D;
1529                                         break;
1530                                 case 0x0E:
1531                                         byte |= SDLA_S502_SEG_E;
1532                                         break;
1533                         }
1534                         break;
1535                 case SDLA_S507:
1536                         switch (map->mem_start >> 16) {
1537                                 case 0x0A:
1538                                         byte |= SDLA_S507_SEG_A;
1539                                         break;
1540                                 case 0x0B:
1541                                         byte |= SDLA_S507_SEG_B;
1542                                         break;
1543                                 case 0x0C:
1544                                         byte |= SDLA_S507_SEG_C;
1545                                         break;
1546                                 case 0x0E:
1547                                         byte |= SDLA_S507_SEG_E;
1548                                         break;
1549                         }
1550                         break;
1551                 case SDLA_S508:
1552                         switch (map->mem_start >> 16) {
1553                                 case 0x0A:
1554                                         byte |= SDLA_S508_SEG_A;
1555                                         break;
1556                                 case 0x0C:
1557                                         byte |= SDLA_S508_SEG_C;
1558                                         break;
1559                                 case 0x0D:
1560                                         byte |= SDLA_S508_SEG_D;
1561                                         break;
1562                                 case 0x0E:
1563                                         byte |= SDLA_S508_SEG_E;
1564                                         break;
1565                         }
1566                         break;
1567         }
1568
1569         /* set the memory bits, and enable access */
1570         outb(byte, base + SDLA_REG_PC_WINDOW);
1571
1572         switch(flp->type)
1573         {
1574                 case SDLA_S502E:
1575                         flp->state = SDLA_S502E_ENABLE;
1576                         break;
1577                 case SDLA_S507:
1578                         flp->state |= SDLA_MEMEN;
1579                         break;
1580                 case SDLA_S508:
1581                         flp->state = SDLA_MEMEN;
1582                         break;
1583         }
1584         outb(flp->state, base + SDLA_REG_CONTROL);
1585
1586         dev->irq = map->irq;
1587         dev->base_addr = base;
1588         dev->mem_start = map->mem_start;
1589         dev->mem_end = dev->mem_start + 0x2000;
1590         flp->initialized = 1;
1591         return 0;
1592
1593 fail2:
1594         free_irq(map->irq, dev);
1595 fail:
1596         release_region(base, SDLA_IO_EXTENTS);
1597         return err;
1598 }
1599
1600 static struct net_device_stats *sdla_stats(struct net_device *dev)
1601 {
1602         struct frad_local *flp;
1603         flp = dev->priv;
1604
1605         return(&flp->stats);
1606 }
1607
1608 static void setup_sdla(struct net_device *dev)
1609 {
1610         struct frad_local *flp = dev->priv;
1611
1612         netdev_boot_setup_check(dev);
1613
1614         SET_MODULE_OWNER(dev);
1615         dev->flags              = 0;
1616         dev->type               = 0xFFFF;
1617         dev->hard_header_len    = 0;
1618         dev->addr_len           = 0;
1619         dev->mtu                = SDLA_MAX_MTU;
1620
1621         dev->open               = sdla_open;
1622         dev->stop               = sdla_close;
1623         dev->do_ioctl           = sdla_ioctl;
1624         dev->set_config         = sdla_set_config;
1625         dev->get_stats          = sdla_stats;
1626         dev->hard_start_xmit    = sdla_transmit;
1627         dev->change_mtu         = sdla_change_mtu;
1628
1629         flp->activate           = sdla_activate;
1630         flp->deactivate         = sdla_deactivate;
1631         flp->assoc              = sdla_assoc;
1632         flp->deassoc            = sdla_deassoc;
1633         flp->dlci_conf          = sdla_dlci_conf;
1634
1635         init_timer(&flp->timer);
1636         flp->timer.expires      = 1;
1637         flp->timer.data         = (unsigned long) dev;
1638         flp->timer.function     = sdla_poll;
1639 }
1640
1641 static struct net_device *sdla;
1642
1643 static int __init init_sdla(void)
1644 {
1645         int err;
1646
1647         printk("%s.\n", version);
1648
1649         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
1650         if (!sdla)
1651                 return -ENOMEM;
1652
1653         err = register_netdev(sdla);
1654         if (err)
1655                 free_netdev(sdla);
1656
1657         return err;
1658 }
1659
1660 static void __exit exit_sdla(void)
1661 {
1662         struct frad_local *flp = sdla->priv;
1663
1664         unregister_netdev(sdla);
1665         if (flp->initialized) {
1666                 free_irq(sdla->irq, sdla);
1667                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1668         }
1669         del_timer_sync(&flp->timer);
1670         free_netdev(sdla);
1671 }
1672
1673 MODULE_LICENSE("GPL");
1674
1675 module_init(init_sdla);
1676 module_exit(exit_sdla);