drivers/net/wan/sdla.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * SDLA         An implementation of a driver for the Sangoma S502/S508 series
   4  *              multi-protocol PC interface card.  Initial offering is with
   5  *              the DLCI driver, providing Frame Relay support for linux.
   6  *
   7  *              Global definitions for the Frame relay interface.
   8  *
   9  * Version:     @(#)sdla.c   0.30       12 Sep 1996
  10  *
  11  * Credits:     Sangoma Technologies, for the use of 2 cards for an extended
  12  *                      period of time.
  13  *              David Mandelstam <dm@sangoma.com> for getting me started on
  14  *                      this project, and incentive to complete it.
  15  *              Gene Kozen <74604.152@compuserve.com> for providing me with
  16  *                      important information about the cards.
  17  *
  18  * Author:      Mike McLagan <mike.mclagan@linux.org>
  19  *
  20  * Changes:
  21  *              0.15    Mike McLagan    Improved error handling, packet dropping
  22  *              0.20    Mike McLagan    New transmit/receive flags for config
  23  *                                      If in FR mode, don't accept packets from
  24  *                                      non DLCI devices.
  25  *              0.25    Mike McLagan    Fixed problem with rejecting packets
  26  *                                      from non DLCI devices.
  27  *              0.30    Mike McLagan    Fixed kernel panic when used with modified
  28  *                                      ifconfig
  29  */
  30
  31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/ptrace.h>
  39 #include <linux/ioport.h>
  40 #include <linux/in.h>
  41 #include <linux/slab.h>
  42 #include <linux/string.h>
  43 #include <linux/timer.h>
  44 #include <linux/errno.h>
  45 #include <linux/init.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/if_arp.h>
  49 #include <linux/if_frad.h>
  50 #include <linux/sdla.h>
  51 #include <linux/bitops.h>
  52
  53 #include <asm/io.h>
  54 #include <asm/dma.h>
  55 #include <linux/uaccess.h>
  56
  57 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
  58
  59 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
  60
  61 static unsigned int valid_mem[] = {
  62                                     0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
  63                                     0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
  64                                     0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
  65                                     0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
  66                                     0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000};
  67
  68 static DEFINE_SPINLOCK(sdla_lock);
  69
  70 /*********************************************************
  71  *
  72  * these are the core routines that access the card itself
  73  *
  74  *********************************************************/
  75
  76 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
  77
  78 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
  79 {
  80         char          *temp;
  81         const void    *base;
  82         int           offset, bytes;
  83
  84         temp = buf;
  85         while(len)
  86         {
  87                 offset = addr & SDLA_ADDR_MASK;
  88                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
  89                 base = (const void *) (dev->mem_start + offset);
  90
  91                 SDLA_WINDOW(dev, addr);
  92                 memcpy(temp, base, bytes);
  93
  94                 addr += bytes;
  95                 temp += bytes;
  96                 len  -= bytes;
  97         }
  98 }
  99
 100 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
 101 {
 102         unsigned long flags;
 103         spin_lock_irqsave(&sdla_lock, flags);
 104         __sdla_read(dev, addr, buf, len);
 105         spin_unlock_irqrestore(&sdla_lock, flags);
 106 }
 107
 108 static void __sdla_write(struct net_device *dev, int addr,
 109                          const void *buf, short len)
 110 {
 111         const char    *temp;
 112         void          *base;
 113         int           offset, bytes;
 114
 115         temp = buf;
 116         while(len)
 117         {
 118                 offset = addr & SDLA_ADDR_MASK;
 119                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
 120                 base = (void *) (dev->mem_start + offset);
 121
 122                 SDLA_WINDOW(dev, addr);
 123                 memcpy(base, temp, bytes);
 124
 125                 addr += bytes;
 126                 temp += bytes;
 127                 len  -= bytes;
 128         }
 129 }
 130
 131 static void sdla_write(struct net_device *dev, int addr,
 132                        const void *buf, short len)
 133 {
 134         unsigned long flags;
 135
 136         spin_lock_irqsave(&sdla_lock, flags);
 137         __sdla_write(dev, addr, buf, len);
 138         spin_unlock_irqrestore(&sdla_lock, flags);
 139 }
 140
 141
 142 static void sdla_clear(struct net_device *dev)
 143 {
 144         unsigned long flags;
 145         char          *base;
 146         int           len, addr, bytes;
 147
 148         len = 65536;
 149         addr = 0;
 150         bytes = SDLA_WINDOW_SIZE;
 151         base = (void *) dev->mem_start;
 152
 153         spin_lock_irqsave(&sdla_lock, flags);
 154         while(len)
 155         {
 156                 SDLA_WINDOW(dev, addr);
 157                 memset(base, 0, bytes);
 158
 159                 addr += bytes;
 160                 len  -= bytes;
 161         }
 162         spin_unlock_irqrestore(&sdla_lock, flags);
 163
 164 }
 165
 166 static char sdla_byte(struct net_device *dev, int addr)
 167 {
 168         unsigned long flags;
 169         char          byte, *temp;
 170
 171         temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
 172
 173         spin_lock_irqsave(&sdla_lock, flags);
 174         SDLA_WINDOW(dev, addr);
 175         byte = *temp;
 176         spin_unlock_irqrestore(&sdla_lock, flags);
 177
 178         return byte;
 179 }
 180
 181 static void sdla_stop(struct net_device *dev)
 182 {
 183         struct frad_local *flp;
 184
 185         flp = netdev_priv(dev);
 186         switch(flp->type)
 187         {
 188                 case SDLA_S502A:
 189                         outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
 190                         flp->state = SDLA_HALT;
 191                         break;
 192                 case SDLA_S502E:
 193                         outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
 194                         outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
 195                         flp->state = SDLA_S502E_ENABLE;
 196                         break;
 197                 case SDLA_S507:
 198                         flp->state &= ~SDLA_CPUEN;
 199                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 200                         break;
 201                 case SDLA_S508:
 202                         flp->state &= ~SDLA_CPUEN;
 203                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 204                         break;
 205         }
 206 }
 207
 208 static void sdla_start(struct net_device *dev)
 209 {
 210         struct frad_local *flp;
 211
 212         flp = netdev_priv(dev);
 213         switch(flp->type)
 214         {
 215                 case SDLA_S502A:
 216                         outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
 217                         outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
 218                         flp->state = SDLA_S502A_START;
 219                         break;
 220                 case SDLA_S502E:
 221                         outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
 222                         outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
 223                         flp->state = 0;
 224                         break;
 225                 case SDLA_S507:
 226                         flp->state |= SDLA_CPUEN;
 227                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 228                         break;
 229                 case SDLA_S508:
 230                         flp->state |= SDLA_CPUEN;
 231                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 232                         break;
 233         }
 234 }
 235
 236 /****************************************************
 237  *
 238  * this is used for the S502A/E cards to determine
 239  * the speed of the onboard CPU.  Calibration is
 240  * necessary for the Frame Relay code uploaded
 241  * later.  Incorrect results cause timing problems
 242  * with link checks & status messages
 243  *
 244  ***************************************************/
 245
 246 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
 247 {
 248         unsigned long start, done, now;
 249         char          resp, *temp;
 250
 251         start = now = jiffies;
 252         done = jiffies + jiffs;
 253
 254         temp = (void *)dev->mem_start;
 255         temp += z80_addr & SDLA_ADDR_MASK;
 256
 257         resp = ~resp1;
 258         while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
 259         {
 260                 if (jiffies != now)
 261                 {
 262                         SDLA_WINDOW(dev, z80_addr);
 263                         now = jiffies;
 264                         resp = *temp;
 265                 }
 266         }
 267         return time_before(jiffies, done) ? jiffies - start : -1;
 268 }
 269
 270 /* constants for Z80 CPU speed */
 271 #define Z80_READY               '1'     /* Z80 is ready to begin */
 272 #define LOADER_READY            '2'     /* driver is ready to begin */
 273 #define Z80_SCC_OK              '3'     /* SCC is on board */
 274 #define Z80_SCC_BAD             '4'     /* SCC was not found */
 275
 276 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
 277 {
 278         int  jiffs;
 279         char data;
 280
 281         sdla_start(dev);
 282         if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
 283                 return -EIO;
 284
 285         data = LOADER_READY;
 286         sdla_write(dev, 0, &data, 1);
 287
 288         if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
 289                 return -EIO;
 290
 291         sdla_stop(dev);
 292         sdla_read(dev, 0, &data, 1);
 293
 294         if (data == Z80_SCC_BAD)
 295         {
 296                 printk("%s: SCC bad\n", dev->name);
 297                 return -EIO;
 298         }
 299
 300         if (data != Z80_SCC_OK)
 301                 return -EINVAL;
 302
 303         if (jiffs < 165)
 304                 ifr->ifr_mtu = SDLA_CPU_16M;
 305         else if (jiffs < 220)
 306                 ifr->ifr_mtu = SDLA_CPU_10M;
 307         else if (jiffs < 258)
 308                 ifr->ifr_mtu = SDLA_CPU_8M;
 309         else if (jiffs < 357)
 310                 ifr->ifr_mtu = SDLA_CPU_7M;
 311         else if (jiffs < 467)
 312                 ifr->ifr_mtu = SDLA_CPU_5M;
 313         else
 314                 ifr->ifr_mtu = SDLA_CPU_3M;
 315
 316         return 0;
 317 }
 318
 319 /************************************************
 320  *
 321  *  Direct interaction with the Frame Relay code
 322  *  starts here.
 323  *
 324  ************************************************/
 325
 326 struct _dlci_stat
 327 {
 328         short dlci;
 329         char  flags;
 330 } __packed;
 331
 332 struct _frad_stat
 333 {
 334         char    flags;
 335         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 336 };
 337
 338 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
 339 {
 340         struct _dlci_stat *pstatus;
 341         short             *pdlci;
 342         int               i;
 343         char              *state, line[30];
 344
 345         switch (ret)
 346         {
 347                 case SDLA_RET_MODEM:
 348                         state = data;
 349                         if (*state & SDLA_MODEM_DCD_LOW)
 350                                 netdev_info(dev, "Modem DCD unexpectedly low!\n");
 351                         if (*state & SDLA_MODEM_CTS_LOW)
 352                                 netdev_info(dev, "Modem CTS unexpectedly low!\n");
 353                         /* I should probably do something about this! */
 354                         break;
 355
 356                 case SDLA_RET_CHANNEL_OFF:
 357                         netdev_info(dev, "Channel became inoperative!\n");
 358                         /* same here */
 359                         break;
 360
 361                 case SDLA_RET_CHANNEL_ON:
 362                         netdev_info(dev, "Channel became operative!\n");
 363                         /* same here */
 364                         break;
 365
 366                 case SDLA_RET_DLCI_STATUS:
 367                         netdev_info(dev, "Status change reported by Access Node\n");
 368                         len /= sizeof(struct _dlci_stat);
 369                         for(pstatus = data, i=0;i < len;i++,pstatus++)
 370                         {
 371                                 if (pstatus->flags & SDLA_DLCI_NEW)
 372                                         state = "new";
 373                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
 374                                         state = "deleted";
 375                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
 376                                         state = "active";
 377                                 else
 378                                 {
 379                                         sprintf(line, "unknown status: %02X", pstatus->flags);
 380                                         state = line;
 381                                 }
 382                                 netdev_info(dev, "DLCI %i: %s\n",
 383                                             pstatus->dlci, state);
 384                                 /* same here */
 385                         }
 386                         break;
 387
 388                 case SDLA_RET_DLCI_UNKNOWN:
 389                         netdev_info(dev, "Received unknown DLCIs:");
 390                         len /= sizeof(short);
 391                         for(pdlci = data,i=0;i < len;i++,pdlci++)
 392                                 pr_cont(" %i", *pdlci);
 393                         pr_cont("\n");
 394                         break;
 395
 396                 case SDLA_RET_TIMEOUT:
 397                         netdev_err(dev, "Command timed out!\n");
 398                         break;
 399
 400                 case SDLA_RET_BUF_OVERSIZE:
 401                         netdev_info(dev, "Bc/CIR overflow, acceptable size is %i\n",
 402                                     len);
 403                         break;
 404
 405                 case SDLA_RET_BUF_TOO_BIG:
 406                         netdev_info(dev, "Buffer size over specified max of %i\n",
 407                                     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                         netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n",
 419                                    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 = netdev_priv(dev);
 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 = netdev_priv(slave);
 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 = netdev_priv(slave);
 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 = netdev_priv(slave);
 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 = netdev_priv(slave);
 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 = netdev_priv(slave);
 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 = netdev_priv(master);
 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 netdev_tx_t sdla_transmit(struct sk_buff *skb,
 656                                  struct net_device *dev)
 657 {
 658         struct frad_local *flp;
 659         int               ret, addr, accept, i;
 660         short             size;
 661         unsigned long     flags;
 662         struct buf_entry  *pbuf;
 663
 664         flp = netdev_priv(dev);
 665         ret = 0;
 666         accept = 1;
 667
 668         netif_stop_queue(dev);
 669
 670         /*
 671          * stupid GateD insists on setting up the multicast router thru us
 672          * and we're ill equipped to handle a non Frame Relay packet at this
 673          * time!
 674          */
 675
 676         accept = 1;
 677         switch (dev->type)
 678         {
 679                 case ARPHRD_FRAD:
 680                         if (skb->dev->type != ARPHRD_DLCI)
 681                         {
 682                                 netdev_warn(dev, "Non DLCI device, type %i, tried to send on FRAD module\n",
 683                                             skb->dev->type);
 684                                 accept = 0;
 685                         }
 686                         break;
 687                 default:
 688                         netdev_warn(dev, "unknown firmware type 0x%04X\n",
 689                                     dev->type);
 690                         accept = 0;
 691                         break;
 692         }
 693         if (accept)
 694         {
 695                 /* this is frame specific, but till there's a PPP module, it's the default */
 696                 switch (flp->type)
 697                 {
 698                         case SDLA_S502A:
 699                         case SDLA_S502E:
 700                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 701                                 break;
 702                                 case SDLA_S508:
 703                                 size = sizeof(addr);
 704                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 705                                 if (ret == SDLA_RET_OK)
 706                                 {
 707
 708                                         spin_lock_irqsave(&sdla_lock, flags);
 709                                         SDLA_WINDOW(dev, addr);
 710                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 711                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 712                                         SDLA_WINDOW(dev, addr);
 713                                         pbuf->opp_flag = 1;
 714                                         spin_unlock_irqrestore(&sdla_lock, flags);
 715                                 }
 716                                 break;
 717                 }
 718
 719                 switch (ret)
 720                 {
 721                         case SDLA_RET_OK:
 722                                 dev->stats.tx_packets++;
 723                                 break;
 724
 725                         case SDLA_RET_CIR_OVERFLOW:
 726                         case SDLA_RET_BUF_OVERSIZE:
 727                         case SDLA_RET_NO_BUFS:
 728                                 dev->stats.tx_dropped++;
 729                                 break;
 730
 731                         default:
 732                                 dev->stats.tx_errors++;
 733                                 break;
 734                 }
 735         }
 736         netif_wake_queue(dev);
 737         for(i=0;i<CONFIG_DLCI_MAX;i++)
 738         {
 739                 if(flp->master[i]!=NULL)
 740                         netif_wake_queue(flp->master[i]);
 741         }
 742
 743         dev_kfree_skb(skb);
 744         return NETDEV_TX_OK;
 745 }
 746
 747 static void sdla_receive(struct net_device *dev)
 748 {
 749         struct net_device         *master;
 750         struct frad_local *flp;
 751         struct dlci_local *dlp;
 752         struct sk_buff   *skb;
 753
 754         struct sdla_cmd *cmd;
 755         struct buf_info *pbufi;
 756         struct buf_entry  *pbuf;
 757
 758         unsigned long     flags;
 759         int               i=0, received, success, addr, buf_base, buf_top;
 760         short             dlci, len, len2, split;
 761
 762         flp = netdev_priv(dev);
 763         success = 1;
 764         received = addr = buf_top = buf_base = 0;
 765         len = dlci = 0;
 766         skb = NULL;
 767         master = NULL;
 768         cmd = NULL;
 769         pbufi = NULL;
 770         pbuf = NULL;
 771
 772         spin_lock_irqsave(&sdla_lock, flags);
 773
 774         switch (flp->type)
 775         {
 776                 case SDLA_S502A:
 777                 case SDLA_S502E:
 778                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 779                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 780                         success = cmd->opp_flag;
 781                         if (!success)
 782                                 break;
 783
 784                         dlci = cmd->dlci;
 785                         len = cmd->length;
 786                         break;
 787
 788                 case SDLA_S508:
 789                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 790                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 791                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 792                         success = pbuf->opp_flag;
 793                         if (!success)
 794                                 break;
 795
 796                         buf_top = pbufi->buf_top;
 797                         buf_base = pbufi->buf_base;
 798                         dlci = pbuf->dlci;
 799                         len = pbuf->length;
 800                         addr = pbuf->buf_addr;
 801                         break;
 802         }
 803
 804         /* common code, find the DLCI and get the SKB */
 805         if (success)
 806         {
 807                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 808                         if (flp->dlci[i] == dlci)
 809                                 break;
 810
 811                 if (i == CONFIG_DLCI_MAX)
 812                 {
 813                         netdev_notice(dev, "Received packet from invalid DLCI %i, ignoring\n",
 814                                       dlci);
 815                         dev->stats.rx_errors++;
 816                         success = 0;
 817                 }
 818         }
 819
 820         if (success)
 821         {
 822                 master = flp->master[i];
 823                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 824                 if (skb == NULL)
 825                 {
 826                         netdev_notice(dev, "Memory squeeze, dropping packet\n");
 827                         dev->stats.rx_dropped++;
 828                         success = 0;
 829                 }
 830                 else
 831                         skb_reserve(skb, sizeof(struct frhdr));
 832         }
 833
 834         /* pick up the data */
 835         switch (flp->type)
 836         {
 837                 case SDLA_S502A:
 838                 case SDLA_S502E:
 839                         if (success)
 840                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 841
 842                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 843                         cmd->opp_flag = 0;
 844                         break;
 845
 846                 case SDLA_S508:
 847                         if (success)
 848                         {
 849                                 /* is this buffer split off the end of the internal ring buffer */
 850                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 851                                 len2 = len - split;
 852
 853                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 854                                 if (split)
 855                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 856                         }
 857
 858                         /* increment the buffer we're looking at */
 859                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 860                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 861                         pbuf->opp_flag = 0;
 862                         break;
 863         }
 864
 865         if (success)
 866         {
 867                 dev->stats.rx_packets++;
 868                 dlp = netdev_priv(master);
 869                 (*dlp->receive)(skb, master);
 870         }
 871
 872         spin_unlock_irqrestore(&sdla_lock, flags);
 873 }
 874
 875 static irqreturn_t sdla_isr(int dummy, void *dev_id)
 876 {
 877         struct net_device     *dev;
 878         struct frad_local *flp;
 879         char              byte;
 880
 881         dev = dev_id;
 882
 883         flp = netdev_priv(dev);
 884
 885         if (!flp->initialized)
 886         {
 887                 netdev_warn(dev, "irq %d for uninitialized device\n", dev->irq);
 888                 return IRQ_NONE;
 889         }
 890
 891         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 892         switch (byte)
 893         {
 894                 case SDLA_INTR_RX:
 895                         sdla_receive(dev);
 896                         break;
 897
 898                 /* the command will get an error return, which is processed above */
 899                 case SDLA_INTR_MODEM:
 900                 case SDLA_INTR_STATUS:
 901                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 902                         break;
 903
 904                 case SDLA_INTR_TX:
 905                 case SDLA_INTR_COMPLETE:
 906                 case SDLA_INTR_TIMER:
 907                         netdev_warn(dev, "invalid irq flag 0x%02X\n", byte);
 908                         break;
 909         }
 910
 911         /* the S502E requires a manual acknowledgement of the interrupt */
 912         if (flp->type == SDLA_S502E)
 913         {
 914                 flp->state &= ~SDLA_S502E_INTACK;
 915                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 916                 flp->state |= SDLA_S502E_INTACK;
 917                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 918         }
 919
 920         /* this clears the byte, informing the Z80 we're done */
 921         byte = 0;
 922         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 923         return IRQ_HANDLED;
 924 }
 925
 926 static void sdla_poll(struct timer_list *t)
 927 {
 928         struct frad_local *flp = from_timer(flp, t, timer);
 929         struct net_device *dev = flp->dev;
 930
 931         if (sdla_byte(dev, SDLA_502_RCV_BUF))
 932                 sdla_receive(dev);
 933
 934         flp->timer.expires = 1;
 935         add_timer(&flp->timer);
 936 }
 937
 938 static int sdla_close(struct net_device *dev)
 939 {
 940         struct frad_local *flp;
 941         struct intr_info  intr;
 942         int               len, i;
 943         short             dlcis[CONFIG_DLCI_MAX];
 944
 945         flp = netdev_priv(dev);
 946
 947         len = 0;
 948         for(i=0;i<CONFIG_DLCI_MAX;i++)
 949                 if (flp->dlci[i])
 950                         dlcis[len++] = abs(flp->dlci[i]);
 951         len *= 2;
 952
 953         if (flp->config.station == FRAD_STATION_NODE)
 954         {
 955                 for(i=0;i<CONFIG_DLCI_MAX;i++)
 956                         if (flp->dlci[i] > 0)
 957                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 958                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 959         }
 960
 961         memset(&intr, 0, sizeof(intr));
 962         /* let's start up the reception */
 963         switch(flp->type)
 964         {
 965                 case SDLA_S502A:
 966                         del_timer(&flp->timer);
 967                         break;
 968
 969                 case SDLA_S502E:
 970                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 971                         flp->state &= ~SDLA_S502E_INTACK;
 972                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 973                         break;
 974
 975                 case SDLA_S507:
 976                         break;
 977
 978                 case SDLA_S508:
 979                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 980                         flp->state &= ~SDLA_S508_INTEN;
 981                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 982                         break;
 983         }
 984
 985         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 986
 987         netif_stop_queue(dev);
 988
 989         return 0;
 990 }
 991
 992 struct conf_data {
 993         struct frad_conf config;
 994         short            dlci[CONFIG_DLCI_MAX];
 995 };
 996
 997 static int sdla_open(struct net_device *dev)
 998 {
 999         struct frad_local *flp;
1000         struct dlci_local *dlp;
1001         struct conf_data  data;
1002         struct intr_info  intr;
1003         int               len, i;
1004         char              byte;
1005
1006         flp = netdev_priv(dev);
1007
1008         if (!flp->initialized)
1009                 return -EPERM;
1010
1011         if (!flp->configured)
1012                 return -EPERM;
1013
1014         /* time to send in the configuration */
1015         len = 0;
1016         for(i=0;i<CONFIG_DLCI_MAX;i++)
1017                 if (flp->dlci[i])
1018                         data.dlci[len++] = abs(flp->dlci[i]);
1019         len *= 2;
1020
1021         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1022         len += sizeof(struct frad_conf);
1023
1024         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1025         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1026
1027         if (flp->type == SDLA_S508)
1028                 flp->buffer = 0;
1029
1030         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1031
1032         /* let's start up the reception */
1033         memset(&intr, 0, sizeof(intr));
1034         switch(flp->type)
1035         {
1036                 case SDLA_S502A:
1037                         flp->timer.expires = 1;
1038                         add_timer(&flp->timer);
1039                         break;
1040
1041                 case SDLA_S502E:
1042                         flp->state |= SDLA_S502E_ENABLE;
1043                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1044                         flp->state |= SDLA_S502E_INTACK;
1045                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1046                         byte = 0;
1047                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1048                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1049                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1050                         break;
1051
1052                 case SDLA_S507:
1053                         break;
1054
1055                 case SDLA_S508:
1056                         flp->state |= SDLA_S508_INTEN;
1057                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1058                         byte = 0;
1059                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1060                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1061                         intr.irq = dev->irq;
1062                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1063                         break;
1064         }
1065
1066         if (flp->config.station == FRAD_STATION_CPE)
1067         {
1068                 byte = SDLA_ICS_STATUS_ENQ;
1069                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1070         }
1071         else
1072         {
1073                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1074                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1075                         if (flp->dlci[i] > 0)
1076                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1077         }
1078
1079         /* configure any specific DLCI settings */
1080         for(i=0;i<CONFIG_DLCI_MAX;i++)
1081                 if (flp->dlci[i])
1082                 {
1083                         dlp = netdev_priv(flp->master[i]);
1084                         if (dlp->configured)
1085                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1086                 }
1087
1088         netif_start_queue(dev);
1089
1090         return 0;
1091 }
1092
1093 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1094 {
1095         struct frad_local *flp;
1096         struct conf_data  data;
1097         int               i;
1098         short             size;
1099
1100         if (dev->type == 0xFFFF)
1101                 return -EUNATCH;
1102
1103         flp = netdev_priv(dev);
1104
1105         if (!get)
1106         {
1107                 if (netif_running(dev))
1108                         return -EBUSY;
1109
1110                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1111                         return -EFAULT;
1112
1113                 if (data.config.station & ~FRAD_STATION_NODE)
1114                         return -EINVAL;
1115
1116                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1117                         return -EINVAL;
1118
1119                 if ((data.config.kbaud < 0) ||
1120                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1121                         return -EINVAL;
1122
1123                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1124                         return -EINVAL;
1125
1126                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1127                         return -EINVAL;
1128
1129                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1130                         return -EINVAL;
1131
1132                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1133                         return -EINVAL;
1134
1135                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1136                         return -EINVAL;
1137
1138                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1139                         return -EINVAL;
1140
1141                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1142                         return -EINVAL;
1143
1144                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1145                 flp->config.flags |= SDLA_DIRECT_RECV;
1146
1147                 if (flp->type == SDLA_S508)
1148                         flp->config.flags |= SDLA_TX70_RX30;
1149
1150                 if (dev->mtu != flp->config.mtu)
1151                 {
1152                         /* this is required to change the MTU */
1153                         dev->mtu = flp->config.mtu;
1154                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1155                                 if (flp->master[i])
1156                                         flp->master[i]->mtu = flp->config.mtu;
1157                 }
1158
1159                 flp->config.mtu += sizeof(struct frhdr);
1160
1161                 /* off to the races! */
1162                 if (!flp->configured)
1163                         sdla_start(dev);
1164
1165                 flp->configured = 1;
1166         }
1167         else
1168         {
1169                 /* no sense reading if the CPU isn't started */
1170                 if (netif_running(dev))
1171                 {
1172                         size = sizeof(data);
1173                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1174                                 return -EIO;
1175                 }
1176                 else
1177                         if (flp->configured)
1178                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1179                         else
1180                                 memset(&data.config, 0, sizeof(struct frad_conf));
1181
1182                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1183                 data.config.flags &= FRAD_VALID_FLAGS;
1184                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1185                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1192 {
1193         struct sdla_mem mem;
1194         char    *temp;
1195
1196         if(copy_from_user(&mem, info, sizeof(mem)))
1197                 return -EFAULT;
1198
1199         if (read)
1200         {
1201                 temp = kzalloc(mem.len, GFP_KERNEL);
1202                 if (!temp)
1203                         return -ENOMEM;
1204                 sdla_read(dev, mem.addr, temp, mem.len);
1205                 if(copy_to_user(mem.data, temp, mem.len))
1206                 {
1207                         kfree(temp);
1208                         return -EFAULT;
1209                 }
1210                 kfree(temp);
1211         }
1212         else
1213         {
1214                 temp = memdup_user(mem.data, mem.len);
1215                 if (IS_ERR(temp))
1216                         return PTR_ERR(temp);
1217                 sdla_write(dev, mem.addr, temp, mem.len);
1218                 kfree(temp);
1219         }
1220         return 0;
1221 }
1222
1223 static int sdla_reconfig(struct net_device *dev)
1224 {
1225         struct frad_local *flp;
1226         struct conf_data  data;
1227         int               i, len;
1228
1229         flp = netdev_priv(dev);
1230
1231         len = 0;
1232         for(i=0;i<CONFIG_DLCI_MAX;i++)
1233                 if (flp->dlci[i])
1234                         data.dlci[len++] = flp->dlci[i];
1235         len *= 2;
1236
1237         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1238         len += sizeof(struct frad_conf);
1239
1240         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1241         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1242         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1243
1244         return 0;
1245 }
1246
1247 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1248 {
1249         struct frad_local *flp;
1250
1251         if(!capable(CAP_NET_ADMIN))
1252                 return -EPERM;
1253
1254         flp = netdev_priv(dev);
1255
1256         if (!flp->initialized)
1257                 return -EINVAL;
1258
1259         switch (cmd)
1260         {
1261                 case FRAD_GET_CONF:
1262                 case FRAD_SET_CONF:
1263                         return sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF);
1264
1265                 case SDLA_IDENTIFY:
1266                         ifr->ifr_flags = flp->type;
1267                         break;
1268
1269                 case SDLA_CPUSPEED:
1270                         return sdla_cpuspeed(dev, ifr);
1271
1272 /* ==========================================================
1273 NOTE:  This is rather a useless action right now, as the
1274        current driver does not support protocols other than
1275        FR.  However, Sangoma has modules for a number of
1276        other protocols in the works.
1277 ============================================================*/
1278                 case SDLA_PROTOCOL:
1279                         if (flp->configured)
1280                                 return -EALREADY;
1281
1282                         switch (ifr->ifr_flags)
1283                         {
1284                                 case ARPHRD_FRAD:
1285                                         dev->type = ifr->ifr_flags;
1286                                         break;
1287                                 default:
1288                                         return -ENOPROTOOPT;
1289                         }
1290                         break;
1291
1292                 case SDLA_CLEARMEM:
1293                         sdla_clear(dev);
1294                         break;
1295
1296                 case SDLA_WRITEMEM:
1297                 case SDLA_READMEM:
1298                         if(!capable(CAP_SYS_RAWIO))
1299                                 return -EPERM;
1300                         return sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM);
1301
1302                 case SDLA_START:
1303                         sdla_start(dev);
1304                         break;
1305
1306                 case SDLA_STOP:
1307                         sdla_stop(dev);
1308                         break;
1309
1310                 default:
1311                         return -EOPNOTSUPP;
1312         }
1313         return 0;
1314 }
1315
1316 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1317 {
1318         if (netif_running(dev))
1319                 return -EBUSY;
1320
1321         /* for now, you can't change the MTU! */
1322         return -EOPNOTSUPP;
1323 }
1324
1325 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1326 {
1327         struct frad_local *flp;
1328         int               i;
1329         char              byte;
1330         unsigned base;
1331         int err = -EINVAL;
1332
1333         flp = netdev_priv(dev);
1334
1335         if (flp->initialized)
1336                 return -EINVAL;
1337
1338         for(i=0; i < ARRAY_SIZE(valid_port); i++)
1339                 if (valid_port[i] == map->base_addr)
1340                         break;
1341
1342         if (i == ARRAY_SIZE(valid_port))
1343                 return -EINVAL;
1344
1345         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1346                 pr_warn("io-port 0x%04lx in use\n", dev->base_addr);
1347                 return -EINVAL;
1348         }
1349         base = map->base_addr;
1350
1351         /* test for card types, S502A, S502E, S507, S508                 */
1352         /* these tests shut down the card completely, so clear the state */
1353         flp->type = SDLA_UNKNOWN;
1354         flp->state = 0;
1355
1356         for(i=1;i<SDLA_IO_EXTENTS;i++)
1357                 if (inb(base + i) != 0xFF)
1358                         break;
1359
1360         if (i == SDLA_IO_EXTENTS) {
1361                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1362                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1363                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1364                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1365                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1366                                 flp->type = SDLA_S502E;
1367                                 goto got_type;
1368                         }
1369                 }
1370         }
1371
1372         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1373                 if (inb(base + i) != byte)
1374                         break;
1375
1376         if (i == SDLA_IO_EXTENTS) {
1377                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1378                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1379                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1380                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1381                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1382                                 flp->type = SDLA_S507;
1383                                 goto got_type;
1384                         }
1385                 }
1386         }
1387
1388         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1389         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1390                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1391                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1392                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1393                         flp->type = SDLA_S508;
1394                         goto got_type;
1395                 }
1396         }
1397
1398         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1399         if (inb(base + SDLA_S502_STS) == 0x40) {
1400                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1401                 if (inb(base + SDLA_S502_STS) == 0x40) {
1402                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1403                         if (inb(base + SDLA_S502_STS) == 0x44) {
1404                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1405                                 flp->type = SDLA_S502A;
1406                                 goto got_type;
1407                         }
1408                 }
1409         }
1410
1411         netdev_notice(dev, "Unknown card type\n");
1412         err = -ENODEV;
1413         goto fail;
1414
1415 got_type:
1416         switch(base) {
1417                 case 0x270:
1418                 case 0x280:
1419                 case 0x380:
1420                 case 0x390:
1421                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1422                                 goto fail;
1423         }
1424
1425         switch (map->irq) {
1426                 case 2:
1427                         if (flp->type != SDLA_S502E)
1428                                 goto fail;
1429                         break;
1430
1431                 case 10:
1432                 case 11:
1433                 case 12:
1434                 case 15:
1435                 case 4:
1436                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1437                                 goto fail;
1438                         break;
1439                 case 3:
1440                 case 5:
1441                 case 7:
1442                         if (flp->type == SDLA_S502A)
1443                                 goto fail;
1444                         break;
1445
1446                 default:
1447                         goto fail;
1448         }
1449
1450         err = -EAGAIN;
1451         if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev))
1452                 goto fail;
1453
1454         if (flp->type == SDLA_S507) {
1455                 switch(dev->irq) {
1456                         case 3:
1457                                 flp->state = SDLA_S507_IRQ3;
1458                                 break;
1459                         case 4:
1460                                 flp->state = SDLA_S507_IRQ4;
1461                                 break;
1462                         case 5:
1463                                 flp->state = SDLA_S507_IRQ5;
1464                                 break;
1465                         case 7:
1466                                 flp->state = SDLA_S507_IRQ7;
1467                                 break;
1468                         case 10:
1469                                 flp->state = SDLA_S507_IRQ10;
1470                                 break;
1471                         case 11:
1472                                 flp->state = SDLA_S507_IRQ11;
1473                                 break;
1474                         case 12:
1475                                 flp->state = SDLA_S507_IRQ12;
1476                                 break;
1477                         case 15:
1478                                 flp->state = SDLA_S507_IRQ15;
1479                                 break;
1480                 }
1481         }
1482
1483         for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1484                 if (valid_mem[i] == map->mem_start)
1485                         break;
1486
1487         err = -EINVAL;
1488         if (i == ARRAY_SIZE(valid_mem))
1489                 goto fail2;
1490
1491         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1492                 goto fail2;
1493
1494         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1495                 goto fail2;
1496
1497         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1498                 goto fail2;
1499
1500         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1501         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1502         switch(flp->type) {
1503                 case SDLA_S502A:
1504                 case SDLA_S502E:
1505                         switch (map->mem_start >> 16) {
1506                                 case 0x0A:
1507                                         byte |= SDLA_S502_SEG_A;
1508                                         break;
1509                                 case 0x0C:
1510                                         byte |= SDLA_S502_SEG_C;
1511                                         break;
1512                                 case 0x0D:
1513                                         byte |= SDLA_S502_SEG_D;
1514                                         break;
1515                                 case 0x0E:
1516                                         byte |= SDLA_S502_SEG_E;
1517                                         break;
1518                         }
1519                         break;
1520                 case SDLA_S507:
1521                         switch (map->mem_start >> 16) {
1522                                 case 0x0A:
1523                                         byte |= SDLA_S507_SEG_A;
1524                                         break;
1525                                 case 0x0B:
1526                                         byte |= SDLA_S507_SEG_B;
1527                                         break;
1528                                 case 0x0C:
1529                                         byte |= SDLA_S507_SEG_C;
1530                                         break;
1531                                 case 0x0E:
1532                                         byte |= SDLA_S507_SEG_E;
1533                                         break;
1534                         }
1535                         break;
1536                 case SDLA_S508:
1537                         switch (map->mem_start >> 16) {
1538                                 case 0x0A:
1539                                         byte |= SDLA_S508_SEG_A;
1540                                         break;
1541                                 case 0x0C:
1542                                         byte |= SDLA_S508_SEG_C;
1543                                         break;
1544                                 case 0x0D:
1545                                         byte |= SDLA_S508_SEG_D;
1546                                         break;
1547                                 case 0x0E:
1548                                         byte |= SDLA_S508_SEG_E;
1549                                         break;
1550                         }
1551                         break;
1552         }
1553
1554         /* set the memory bits, and enable access */
1555         outb(byte, base + SDLA_REG_PC_WINDOW);
1556
1557         switch(flp->type)
1558         {
1559                 case SDLA_S502E:
1560                         flp->state = SDLA_S502E_ENABLE;
1561                         break;
1562                 case SDLA_S507:
1563                         flp->state |= SDLA_MEMEN;
1564                         break;
1565                 case SDLA_S508:
1566                         flp->state = SDLA_MEMEN;
1567                         break;
1568         }
1569         outb(flp->state, base + SDLA_REG_CONTROL);
1570
1571         dev->irq = map->irq;
1572         dev->base_addr = base;
1573         dev->mem_start = map->mem_start;
1574         dev->mem_end = dev->mem_start + 0x2000;
1575         flp->initialized = 1;
1576         return 0;
1577
1578 fail2:
1579         free_irq(map->irq, dev);
1580 fail:
1581         release_region(base, SDLA_IO_EXTENTS);
1582         return err;
1583 }
1584
1585 static const struct net_device_ops sdla_netdev_ops = {
1586         .ndo_open       = sdla_open,
1587         .ndo_stop       = sdla_close,
1588         .ndo_do_ioctl   = sdla_ioctl,
1589         .ndo_set_config = sdla_set_config,
1590         .ndo_start_xmit = sdla_transmit,
1591         .ndo_change_mtu = sdla_change_mtu,
1592 };
1593
1594 static void setup_sdla(struct net_device *dev)
1595 {
1596         struct frad_local *flp = netdev_priv(dev);
1597
1598         netdev_boot_setup_check(dev);
1599
1600         dev->netdev_ops         = &sdla_netdev_ops;
1601         dev->flags              = 0;
1602         dev->type               = 0xFFFF;
1603         dev->hard_header_len    = 0;
1604         dev->addr_len           = 0;
1605         dev->mtu                = SDLA_MAX_MTU;
1606
1607         flp->activate           = sdla_activate;
1608         flp->deactivate         = sdla_deactivate;
1609         flp->assoc              = sdla_assoc;
1610         flp->deassoc            = sdla_deassoc;
1611         flp->dlci_conf          = sdla_dlci_conf;
1612         flp->dev                = dev;
1613
1614         timer_setup(&flp->timer, sdla_poll, 0);
1615         flp->timer.expires      = 1;
1616 }
1617
1618 static struct net_device *sdla;
1619
1620 static int __init init_sdla(void)
1621 {
1622         int err;
1623
1624         printk("%s.\n", version);
1625
1626         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0",
1627                             NET_NAME_UNKNOWN, setup_sdla);
1628         if (!sdla)
1629                 return -ENOMEM;
1630
1631         err = register_netdev(sdla);
1632         if (err)
1633                 free_netdev(sdla);
1634
1635         return err;
1636 }
1637
1638 static void __exit exit_sdla(void)
1639 {
1640         struct frad_local *flp = netdev_priv(sdla);
1641
1642         unregister_netdev(sdla);
1643         if (flp->initialized) {
1644                 free_irq(sdla->irq, sdla);
1645                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1646         }
1647         del_timer_sync(&flp->timer);
1648         free_netdev(sdla);
1649 }
1650
1651 MODULE_LICENSE("GPL");
1652
1653 module_init(init_sdla);
1654 module_exit(exit_sdla);