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                         /* Else, fall through */
 417
 418                 default:
 419                         netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n",
 420                                    cmd, ret);
 421                         /* Further processing could be done here */
 422                         break;
 423         }
 424 }
 425
 426 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
 427                         void *inbuf, short inlen, void *outbuf, short *outlen)
 428 {
 429         static struct _frad_stat status;
 430         struct frad_local        *flp;
 431         struct sdla_cmd          *cmd_buf;
 432         unsigned long            pflags;
 433         unsigned long            jiffs;
 434         int                      ret, waiting, len;
 435         long                     window;
 436
 437         flp = netdev_priv(dev);
 438         window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
 439         cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
 440         ret = 0;
 441         len = 0;
 442         jiffs = jiffies + HZ;  /* 1 second is plenty */
 443
 444         spin_lock_irqsave(&sdla_lock, pflags);
 445         SDLA_WINDOW(dev, window);
 446         cmd_buf->cmd = cmd;
 447         cmd_buf->dlci = dlci;
 448         cmd_buf->flags = flags;
 449
 450         if (inbuf)
 451                 memcpy(cmd_buf->data, inbuf, inlen);
 452
 453         cmd_buf->length = inlen;
 454
 455         cmd_buf->opp_flag = 1;
 456         spin_unlock_irqrestore(&sdla_lock, pflags);
 457
 458         waiting = 1;
 459         len = 0;
 460         while (waiting && time_before_eq(jiffies, jiffs))
 461         {
 462                 if (waiting++ % 3)
 463                 {
 464                         spin_lock_irqsave(&sdla_lock, pflags);
 465                         SDLA_WINDOW(dev, window);
 466                         waiting = ((volatile int)(cmd_buf->opp_flag));
 467                         spin_unlock_irqrestore(&sdla_lock, pflags);
 468                 }
 469         }
 470
 471         if (!waiting)
 472         {
 473
 474                 spin_lock_irqsave(&sdla_lock, pflags);
 475                 SDLA_WINDOW(dev, window);
 476                 ret = cmd_buf->retval;
 477                 len = cmd_buf->length;
 478                 if (outbuf && outlen)
 479                 {
 480                         *outlen = *outlen >= len ? len : *outlen;
 481
 482                         if (*outlen)
 483                                 memcpy(outbuf, cmd_buf->data, *outlen);
 484                 }
 485
 486                 /* This is a local copy that's used for error handling */
 487                 if (ret)
 488                         memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
 489
 490                 spin_unlock_irqrestore(&sdla_lock, pflags);
 491         }
 492         else
 493                 ret = SDLA_RET_TIMEOUT;
 494
 495         if (ret != SDLA_RET_OK)
 496                 sdla_errors(dev, cmd, dlci, ret, len, &status);
 497
 498         return ret;
 499 }
 500
 501 /***********************************************
 502  *
 503  * these functions are called by the DLCI driver
 504  *
 505  ***********************************************/
 506
 507 static int sdla_reconfig(struct net_device *dev);
 508
 509 static int sdla_activate(struct net_device *slave, struct net_device *master)
 510 {
 511         struct frad_local *flp;
 512         int i;
 513
 514         flp = netdev_priv(slave);
 515
 516         for(i=0;i<CONFIG_DLCI_MAX;i++)
 517                 if (flp->master[i] == master)
 518                         break;
 519
 520         if (i == CONFIG_DLCI_MAX)
 521                 return -ENODEV;
 522
 523         flp->dlci[i] = abs(flp->dlci[i]);
 524
 525         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 526                 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 527
 528         return 0;
 529 }
 530
 531 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
 532 {
 533         struct frad_local *flp;
 534         int               i;
 535
 536         flp = netdev_priv(slave);
 537
 538         for(i=0;i<CONFIG_DLCI_MAX;i++)
 539                 if (flp->master[i] == master)
 540                         break;
 541
 542         if (i == CONFIG_DLCI_MAX)
 543                 return -ENODEV;
 544
 545         flp->dlci[i] = -abs(flp->dlci[i]);
 546
 547         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 548                 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 549
 550         return 0;
 551 }
 552
 553 static int sdla_assoc(struct net_device *slave, struct net_device *master)
 554 {
 555         struct frad_local *flp;
 556         int               i;
 557
 558         if (master->type != ARPHRD_DLCI)
 559                 return -EINVAL;
 560
 561         flp = netdev_priv(slave);
 562
 563         for(i=0;i<CONFIG_DLCI_MAX;i++)
 564         {
 565                 if (!flp->master[i])
 566                         break;
 567                 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
 568                         return -EADDRINUSE;
 569         }
 570
 571         if (i == CONFIG_DLCI_MAX)
 572                 return -EMLINK;  /* #### Alan: Comments on this ?? */
 573
 574
 575         flp->master[i] = master;
 576         flp->dlci[i] = -*(short *)(master->dev_addr);
 577         master->mtu = slave->mtu;
 578
 579         if (netif_running(slave)) {
 580                 if (flp->config.station == FRAD_STATION_CPE)
 581                         sdla_reconfig(slave);
 582                 else
 583                         sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 584         }
 585
 586         return 0;
 587 }
 588
 589 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
 590 {
 591         struct frad_local *flp;
 592         int               i;
 593
 594         flp = netdev_priv(slave);
 595
 596         for(i=0;i<CONFIG_DLCI_MAX;i++)
 597                 if (flp->master[i] == master)
 598                         break;
 599
 600         if (i == CONFIG_DLCI_MAX)
 601                 return -ENODEV;
 602
 603         flp->master[i] = NULL;
 604         flp->dlci[i] = 0;
 605
 606
 607         if (netif_running(slave)) {
 608                 if (flp->config.station == FRAD_STATION_CPE)
 609                         sdla_reconfig(slave);
 610                 else
 611                         sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 612         }
 613
 614         return 0;
 615 }
 616
 617 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
 618 {
 619         struct frad_local *flp;
 620         struct dlci_local *dlp;
 621         int               i;
 622         short             len, ret;
 623
 624         flp = netdev_priv(slave);
 625
 626         for(i=0;i<CONFIG_DLCI_MAX;i++)
 627                 if (flp->master[i] == master)
 628                         break;
 629
 630         if (i == CONFIG_DLCI_MAX)
 631                 return -ENODEV;
 632
 633         dlp = netdev_priv(master);
 634
 635         ret = SDLA_RET_OK;
 636         len = sizeof(struct dlci_conf);
 637         if (netif_running(slave)) {
 638                 if (get)
 639                         ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 640                                     NULL, 0, &dlp->config, &len);
 641                 else
 642                         ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 643                                     &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
 644         }
 645
 646         return ret == SDLA_RET_OK ? 0 : -EIO;
 647 }
 648
 649 /**************************
 650  *
 651  * now for the Linux driver
 652  *
 653  **************************/
 654
 655 /* NOTE: the DLCI driver deals with freeing the SKB!! */
 656 static netdev_tx_t sdla_transmit(struct sk_buff *skb,
 657                                  struct net_device *dev)
 658 {
 659         struct frad_local *flp;
 660         int               ret, addr, accept, i;
 661         short             size;
 662         unsigned long     flags;
 663         struct buf_entry  *pbuf;
 664
 665         flp = netdev_priv(dev);
 666         ret = 0;
 667         accept = 1;
 668
 669         netif_stop_queue(dev);
 670
 671         /*
 672          * stupid GateD insists on setting up the multicast router thru us
 673          * and we're ill equipped to handle a non Frame Relay packet at this
 674          * time!
 675          */
 676
 677         accept = 1;
 678         switch (dev->type)
 679         {
 680                 case ARPHRD_FRAD:
 681                         if (skb->dev->type != ARPHRD_DLCI)
 682                         {
 683                                 netdev_warn(dev, "Non DLCI device, type %i, tried to send on FRAD module\n",
 684                                             skb->dev->type);
 685                                 accept = 0;
 686                         }
 687                         break;
 688                 default:
 689                         netdev_warn(dev, "unknown firmware type 0x%04X\n",
 690                                     dev->type);
 691                         accept = 0;
 692                         break;
 693         }
 694         if (accept)
 695         {
 696                 /* this is frame specific, but till there's a PPP module, it's the default */
 697                 switch (flp->type)
 698                 {
 699                         case SDLA_S502A:
 700                         case SDLA_S502E:
 701                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 702                                 break;
 703                                 case SDLA_S508:
 704                                 size = sizeof(addr);
 705                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 706                                 if (ret == SDLA_RET_OK)
 707                                 {
 708
 709                                         spin_lock_irqsave(&sdla_lock, flags);
 710                                         SDLA_WINDOW(dev, addr);
 711                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 712                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 713                                         SDLA_WINDOW(dev, addr);
 714                                         pbuf->opp_flag = 1;
 715                                         spin_unlock_irqrestore(&sdla_lock, flags);
 716                                 }
 717                                 break;
 718                 }
 719
 720                 switch (ret)
 721                 {
 722                         case SDLA_RET_OK:
 723                                 dev->stats.tx_packets++;
 724                                 break;
 725
 726                         case SDLA_RET_CIR_OVERFLOW:
 727                         case SDLA_RET_BUF_OVERSIZE:
 728                         case SDLA_RET_NO_BUFS:
 729                                 dev->stats.tx_dropped++;
 730                                 break;
 731
 732                         default:
 733                                 dev->stats.tx_errors++;
 734                                 break;
 735                 }
 736         }
 737         netif_wake_queue(dev);
 738         for(i=0;i<CONFIG_DLCI_MAX;i++)
 739         {
 740                 if(flp->master[i]!=NULL)
 741                         netif_wake_queue(flp->master[i]);
 742         }
 743
 744         dev_kfree_skb(skb);
 745         return NETDEV_TX_OK;
 746 }
 747
 748 static void sdla_receive(struct net_device *dev)
 749 {
 750         struct net_device         *master;
 751         struct frad_local *flp;
 752         struct dlci_local *dlp;
 753         struct sk_buff   *skb;
 754
 755         struct sdla_cmd *cmd;
 756         struct buf_info *pbufi;
 757         struct buf_entry  *pbuf;
 758
 759         unsigned long     flags;
 760         int               i=0, received, success, addr, buf_base, buf_top;
 761         short             dlci, len, len2, split;
 762
 763         flp = netdev_priv(dev);
 764         success = 1;
 765         received = addr = buf_top = buf_base = 0;
 766         len = dlci = 0;
 767         skb = NULL;
 768         master = NULL;
 769         cmd = NULL;
 770         pbufi = NULL;
 771         pbuf = NULL;
 772
 773         spin_lock_irqsave(&sdla_lock, flags);
 774
 775         switch (flp->type)
 776         {
 777                 case SDLA_S502A:
 778                 case SDLA_S502E:
 779                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 780                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 781                         success = cmd->opp_flag;
 782                         if (!success)
 783                                 break;
 784
 785                         dlci = cmd->dlci;
 786                         len = cmd->length;
 787                         break;
 788
 789                 case SDLA_S508:
 790                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 791                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 792                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 793                         success = pbuf->opp_flag;
 794                         if (!success)
 795                                 break;
 796
 797                         buf_top = pbufi->buf_top;
 798                         buf_base = pbufi->buf_base;
 799                         dlci = pbuf->dlci;
 800                         len = pbuf->length;
 801                         addr = pbuf->buf_addr;
 802                         break;
 803         }
 804
 805         /* common code, find the DLCI and get the SKB */
 806         if (success)
 807         {
 808                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 809                         if (flp->dlci[i] == dlci)
 810                                 break;
 811
 812                 if (i == CONFIG_DLCI_MAX)
 813                 {
 814                         netdev_notice(dev, "Received packet from invalid DLCI %i, ignoring\n",
 815                                       dlci);
 816                         dev->stats.rx_errors++;
 817                         success = 0;
 818                 }
 819         }
 820
 821         if (success)
 822         {
 823                 master = flp->master[i];
 824                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 825                 if (skb == NULL)
 826                 {
 827                         netdev_notice(dev, "Memory squeeze, dropping packet\n");
 828                         dev->stats.rx_dropped++;
 829                         success = 0;
 830                 }
 831                 else
 832                         skb_reserve(skb, sizeof(struct frhdr));
 833         }
 834
 835         /* pick up the data */
 836         switch (flp->type)
 837         {
 838                 case SDLA_S502A:
 839                 case SDLA_S502E:
 840                         if (success)
 841                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 842
 843                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 844                         cmd->opp_flag = 0;
 845                         break;
 846
 847                 case SDLA_S508:
 848                         if (success)
 849                         {
 850                                 /* is this buffer split off the end of the internal ring buffer */
 851                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 852                                 len2 = len - split;
 853
 854                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 855                                 if (split)
 856                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 857                         }
 858
 859                         /* increment the buffer we're looking at */
 860                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 861                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 862                         pbuf->opp_flag = 0;
 863                         break;
 864         }
 865
 866         if (success)
 867         {
 868                 dev->stats.rx_packets++;
 869                 dlp = netdev_priv(master);
 870                 (*dlp->receive)(skb, master);
 871         }
 872
 873         spin_unlock_irqrestore(&sdla_lock, flags);
 874 }
 875
 876 static irqreturn_t sdla_isr(int dummy, void *dev_id)
 877 {
 878         struct net_device     *dev;
 879         struct frad_local *flp;
 880         char              byte;
 881
 882         dev = dev_id;
 883
 884         flp = netdev_priv(dev);
 885
 886         if (!flp->initialized)
 887         {
 888                 netdev_warn(dev, "irq %d for uninitialized device\n", dev->irq);
 889                 return IRQ_NONE;
 890         }
 891
 892         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 893         switch (byte)
 894         {
 895                 case SDLA_INTR_RX:
 896                         sdla_receive(dev);
 897                         break;
 898
 899                 /* the command will get an error return, which is processed above */
 900                 case SDLA_INTR_MODEM:
 901                 case SDLA_INTR_STATUS:
 902                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 903                         break;
 904
 905                 case SDLA_INTR_TX:
 906                 case SDLA_INTR_COMPLETE:
 907                 case SDLA_INTR_TIMER:
 908                         netdev_warn(dev, "invalid irq flag 0x%02X\n", byte);
 909                         break;
 910         }
 911
 912         /* the S502E requires a manual acknowledgement of the interrupt */
 913         if (flp->type == SDLA_S502E)
 914         {
 915                 flp->state &= ~SDLA_S502E_INTACK;
 916                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 917                 flp->state |= SDLA_S502E_INTACK;
 918                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 919         }
 920
 921         /* this clears the byte, informing the Z80 we're done */
 922         byte = 0;
 923         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 924         return IRQ_HANDLED;
 925 }
 926
 927 static void sdla_poll(struct timer_list *t)
 928 {
 929         struct frad_local *flp = from_timer(flp, t, timer);
 930         struct net_device *dev = flp->dev;
 931
 932         if (sdla_byte(dev, SDLA_502_RCV_BUF))
 933                 sdla_receive(dev);
 934
 935         flp->timer.expires = 1;
 936         add_timer(&flp->timer);
 937 }
 938
 939 static int sdla_close(struct net_device *dev)
 940 {
 941         struct frad_local *flp;
 942         struct intr_info  intr;
 943         int               len, i;
 944         short             dlcis[CONFIG_DLCI_MAX];
 945
 946         flp = netdev_priv(dev);
 947
 948         len = 0;
 949         for(i=0;i<CONFIG_DLCI_MAX;i++)
 950                 if (flp->dlci[i])
 951                         dlcis[len++] = abs(flp->dlci[i]);
 952         len *= 2;
 953
 954         if (flp->config.station == FRAD_STATION_NODE)
 955         {
 956                 for(i=0;i<CONFIG_DLCI_MAX;i++)
 957                         if (flp->dlci[i] > 0)
 958                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 959                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 960         }
 961
 962         memset(&intr, 0, sizeof(intr));
 963         /* let's start up the reception */
 964         switch(flp->type)
 965         {
 966                 case SDLA_S502A:
 967                         del_timer(&flp->timer);
 968                         break;
 969
 970                 case SDLA_S502E:
 971                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 972                         flp->state &= ~SDLA_S502E_INTACK;
 973                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 974                         break;
 975
 976                 case SDLA_S507:
 977                         break;
 978
 979                 case SDLA_S508:
 980                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 981                         flp->state &= ~SDLA_S508_INTEN;
 982                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 983                         break;
 984         }
 985
 986         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 987
 988         netif_stop_queue(dev);
 989
 990         return 0;
 991 }
 992
 993 struct conf_data {
 994         struct frad_conf config;
 995         short            dlci[CONFIG_DLCI_MAX];
 996 };
 997
 998 static int sdla_open(struct net_device *dev)
 999 {
1000         struct frad_local *flp;
1001         struct dlci_local *dlp;
1002         struct conf_data  data;
1003         struct intr_info  intr;
1004         int               len, i;
1005         char              byte;
1006
1007         flp = netdev_priv(dev);
1008
1009         if (!flp->initialized)
1010                 return -EPERM;
1011
1012         if (!flp->configured)
1013                 return -EPERM;
1014
1015         /* time to send in the configuration */
1016         len = 0;
1017         for(i=0;i<CONFIG_DLCI_MAX;i++)
1018                 if (flp->dlci[i])
1019                         data.dlci[len++] = abs(flp->dlci[i]);
1020         len *= 2;
1021
1022         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1023         len += sizeof(struct frad_conf);
1024
1025         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1026         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1027
1028         if (flp->type == SDLA_S508)
1029                 flp->buffer = 0;
1030
1031         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1032
1033         /* let's start up the reception */
1034         memset(&intr, 0, sizeof(intr));
1035         switch(flp->type)
1036         {
1037                 case SDLA_S502A:
1038                         flp->timer.expires = 1;
1039                         add_timer(&flp->timer);
1040                         break;
1041
1042                 case SDLA_S502E:
1043                         flp->state |= SDLA_S502E_ENABLE;
1044                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1045                         flp->state |= SDLA_S502E_INTACK;
1046                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1047                         byte = 0;
1048                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1049                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1050                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1051                         break;
1052
1053                 case SDLA_S507:
1054                         break;
1055
1056                 case SDLA_S508:
1057                         flp->state |= SDLA_S508_INTEN;
1058                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1059                         byte = 0;
1060                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1061                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1062                         intr.irq = dev->irq;
1063                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1064                         break;
1065         }
1066
1067         if (flp->config.station == FRAD_STATION_CPE)
1068         {
1069                 byte = SDLA_ICS_STATUS_ENQ;
1070                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1071         }
1072         else
1073         {
1074                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1075                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1076                         if (flp->dlci[i] > 0)
1077                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1078         }
1079
1080         /* configure any specific DLCI settings */
1081         for(i=0;i<CONFIG_DLCI_MAX;i++)
1082                 if (flp->dlci[i])
1083                 {
1084                         dlp = netdev_priv(flp->master[i]);
1085                         if (dlp->configured)
1086                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1087                 }
1088
1089         netif_start_queue(dev);
1090
1091         return 0;
1092 }
1093
1094 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1095 {
1096         struct frad_local *flp;
1097         struct conf_data  data;
1098         int               i;
1099         short             size;
1100
1101         if (dev->type == 0xFFFF)
1102                 return -EUNATCH;
1103
1104         flp = netdev_priv(dev);
1105
1106         if (!get)
1107         {
1108                 if (netif_running(dev))
1109                         return -EBUSY;
1110
1111                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1112                         return -EFAULT;
1113
1114                 if (data.config.station & ~FRAD_STATION_NODE)
1115                         return -EINVAL;
1116
1117                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1118                         return -EINVAL;
1119
1120                 if ((data.config.kbaud < 0) ||
1121                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1122                         return -EINVAL;
1123
1124                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1125                         return -EINVAL;
1126
1127                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1128                         return -EINVAL;
1129
1130                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1131                         return -EINVAL;
1132
1133                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1134                         return -EINVAL;
1135
1136                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1137                         return -EINVAL;
1138
1139                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1140                         return -EINVAL;
1141
1142                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1143                         return -EINVAL;
1144
1145                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1146                 flp->config.flags |= SDLA_DIRECT_RECV;
1147
1148                 if (flp->type == SDLA_S508)
1149                         flp->config.flags |= SDLA_TX70_RX30;
1150
1151                 if (dev->mtu != flp->config.mtu)
1152                 {
1153                         /* this is required to change the MTU */
1154                         dev->mtu = flp->config.mtu;
1155                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1156                                 if (flp->master[i])
1157                                         flp->master[i]->mtu = flp->config.mtu;
1158                 }
1159
1160                 flp->config.mtu += sizeof(struct frhdr);
1161
1162                 /* off to the races! */
1163                 if (!flp->configured)
1164                         sdla_start(dev);
1165
1166                 flp->configured = 1;
1167         }
1168         else
1169         {
1170                 /* no sense reading if the CPU isn't started */
1171                 if (netif_running(dev))
1172                 {
1173                         size = sizeof(data);
1174                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1175                                 return -EIO;
1176                 }
1177                 else
1178                         if (flp->configured)
1179                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1180                         else
1181                                 memset(&data.config, 0, sizeof(struct frad_conf));
1182
1183                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1184                 data.config.flags &= FRAD_VALID_FLAGS;
1185                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1186                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1187         }
1188
1189         return 0;
1190 }
1191
1192 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1193 {
1194         struct sdla_mem mem;
1195         char    *temp;
1196
1197         if(copy_from_user(&mem, info, sizeof(mem)))
1198                 return -EFAULT;
1199
1200         if (read)
1201         {
1202                 temp = kzalloc(mem.len, GFP_KERNEL);
1203                 if (!temp)
1204                         return -ENOMEM;
1205                 sdla_read(dev, mem.addr, temp, mem.len);
1206                 if(copy_to_user(mem.data, temp, mem.len))
1207                 {
1208                         kfree(temp);
1209                         return -EFAULT;
1210                 }
1211                 kfree(temp);
1212         }
1213         else
1214         {
1215                 temp = memdup_user(mem.data, mem.len);
1216                 if (IS_ERR(temp))
1217                         return PTR_ERR(temp);
1218                 sdla_write(dev, mem.addr, temp, mem.len);
1219                 kfree(temp);
1220         }
1221         return 0;
1222 }
1223
1224 static int sdla_reconfig(struct net_device *dev)
1225 {
1226         struct frad_local *flp;
1227         struct conf_data  data;
1228         int               i, len;
1229
1230         flp = netdev_priv(dev);
1231
1232         len = 0;
1233         for(i=0;i<CONFIG_DLCI_MAX;i++)
1234                 if (flp->dlci[i])
1235                         data.dlci[len++] = flp->dlci[i];
1236         len *= 2;
1237
1238         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1239         len += sizeof(struct frad_conf);
1240
1241         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1242         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1243         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1244
1245         return 0;
1246 }
1247
1248 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1249 {
1250         struct frad_local *flp;
1251
1252         if(!capable(CAP_NET_ADMIN))
1253                 return -EPERM;
1254
1255         flp = netdev_priv(dev);
1256
1257         if (!flp->initialized)
1258                 return -EINVAL;
1259
1260         switch (cmd)
1261         {
1262                 case FRAD_GET_CONF:
1263                 case FRAD_SET_CONF:
1264                         return sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF);
1265
1266                 case SDLA_IDENTIFY:
1267                         ifr->ifr_flags = flp->type;
1268                         break;
1269
1270                 case SDLA_CPUSPEED:
1271                         return sdla_cpuspeed(dev, ifr);
1272
1273 /* ==========================================================
1274 NOTE:  This is rather a useless action right now, as the
1275        current driver does not support protocols other than
1276        FR.  However, Sangoma has modules for a number of
1277        other protocols in the works.
1278 ============================================================*/
1279                 case SDLA_PROTOCOL:
1280                         if (flp->configured)
1281                                 return -EALREADY;
1282
1283                         switch (ifr->ifr_flags)
1284                         {
1285                                 case ARPHRD_FRAD:
1286                                         dev->type = ifr->ifr_flags;
1287                                         break;
1288                                 default:
1289                                         return -ENOPROTOOPT;
1290                         }
1291                         break;
1292
1293                 case SDLA_CLEARMEM:
1294                         sdla_clear(dev);
1295                         break;
1296
1297                 case SDLA_WRITEMEM:
1298                 case SDLA_READMEM:
1299                         if(!capable(CAP_SYS_RAWIO))
1300                                 return -EPERM;
1301                         return sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM);
1302
1303                 case SDLA_START:
1304                         sdla_start(dev);
1305                         break;
1306
1307                 case SDLA_STOP:
1308                         sdla_stop(dev);
1309                         break;
1310
1311                 default:
1312                         return -EOPNOTSUPP;
1313         }
1314         return 0;
1315 }
1316
1317 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1318 {
1319         if (netif_running(dev))
1320                 return -EBUSY;
1321
1322         /* for now, you can't change the MTU! */
1323         return -EOPNOTSUPP;
1324 }
1325
1326 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1327 {
1328         struct frad_local *flp;
1329         int               i;
1330         char              byte;
1331         unsigned base;
1332         int err = -EINVAL;
1333
1334         flp = netdev_priv(dev);
1335
1336         if (flp->initialized)
1337                 return -EINVAL;
1338
1339         for(i=0; i < ARRAY_SIZE(valid_port); i++)
1340                 if (valid_port[i] == map->base_addr)
1341                         break;
1342
1343         if (i == ARRAY_SIZE(valid_port))
1344                 return -EINVAL;
1345
1346         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1347                 pr_warn("io-port 0x%04lx in use\n", dev->base_addr);
1348                 return -EINVAL;
1349         }
1350         base = map->base_addr;
1351
1352         /* test for card types, S502A, S502E, S507, S508                 */
1353         /* these tests shut down the card completely, so clear the state */
1354         flp->type = SDLA_UNKNOWN;
1355         flp->state = 0;
1356
1357         for(i=1;i<SDLA_IO_EXTENTS;i++)
1358                 if (inb(base + i) != 0xFF)
1359                         break;
1360
1361         if (i == SDLA_IO_EXTENTS) {
1362                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1363                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1364                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1365                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1366                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1367                                 flp->type = SDLA_S502E;
1368                                 goto got_type;
1369                         }
1370                 }
1371         }
1372
1373         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1374                 if (inb(base + i) != byte)
1375                         break;
1376
1377         if (i == SDLA_IO_EXTENTS) {
1378                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1379                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1380                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1381                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1382                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1383                                 flp->type = SDLA_S507;
1384                                 goto got_type;
1385                         }
1386                 }
1387         }
1388
1389         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1390         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1391                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1392                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1393                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1394                         flp->type = SDLA_S508;
1395                         goto got_type;
1396                 }
1397         }
1398
1399         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1400         if (inb(base + SDLA_S502_STS) == 0x40) {
1401                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1402                 if (inb(base + SDLA_S502_STS) == 0x40) {
1403                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1404                         if (inb(base + SDLA_S502_STS) == 0x44) {
1405                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1406                                 flp->type = SDLA_S502A;
1407                                 goto got_type;
1408                         }
1409                 }
1410         }
1411
1412         netdev_notice(dev, "Unknown card type\n");
1413         err = -ENODEV;
1414         goto fail;
1415
1416 got_type:
1417         switch(base) {
1418                 case 0x270:
1419                 case 0x280:
1420                 case 0x380:
1421                 case 0x390:
1422                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1423                                 goto fail;
1424         }
1425
1426         switch (map->irq) {
1427                 case 2:
1428                         if (flp->type != SDLA_S502E)
1429                                 goto fail;
1430                         break;
1431
1432                 case 10:
1433                 case 11:
1434                 case 12:
1435                 case 15:
1436                 case 4:
1437                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1438                                 goto fail;
1439                         break;
1440                 case 3:
1441                 case 5:
1442                 case 7:
1443                         if (flp->type == SDLA_S502A)
1444                                 goto fail;
1445                         break;
1446
1447                 default:
1448                         goto fail;
1449         }
1450
1451         err = -EAGAIN;
1452         if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev))
1453                 goto fail;
1454
1455         if (flp->type == SDLA_S507) {
1456                 switch(dev->irq) {
1457                         case 3:
1458                                 flp->state = SDLA_S507_IRQ3;
1459                                 break;
1460                         case 4:
1461                                 flp->state = SDLA_S507_IRQ4;
1462                                 break;
1463                         case 5:
1464                                 flp->state = SDLA_S507_IRQ5;
1465                                 break;
1466                         case 7:
1467                                 flp->state = SDLA_S507_IRQ7;
1468                                 break;
1469                         case 10:
1470                                 flp->state = SDLA_S507_IRQ10;
1471                                 break;
1472                         case 11:
1473                                 flp->state = SDLA_S507_IRQ11;
1474                                 break;
1475                         case 12:
1476                                 flp->state = SDLA_S507_IRQ12;
1477                                 break;
1478                         case 15:
1479                                 flp->state = SDLA_S507_IRQ15;
1480                                 break;
1481                 }
1482         }
1483
1484         for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1485                 if (valid_mem[i] == map->mem_start)
1486                         break;
1487
1488         err = -EINVAL;
1489         if (i == ARRAY_SIZE(valid_mem))
1490                 goto fail2;
1491
1492         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1493                 goto fail2;
1494
1495         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1496                 goto fail2;
1497
1498         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1499                 goto fail2;
1500
1501         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1502         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1503         switch(flp->type) {
1504                 case SDLA_S502A:
1505                 case SDLA_S502E:
1506                         switch (map->mem_start >> 16) {
1507                                 case 0x0A:
1508                                         byte |= SDLA_S502_SEG_A;
1509                                         break;
1510                                 case 0x0C:
1511                                         byte |= SDLA_S502_SEG_C;
1512                                         break;
1513                                 case 0x0D:
1514                                         byte |= SDLA_S502_SEG_D;
1515                                         break;
1516                                 case 0x0E:
1517                                         byte |= SDLA_S502_SEG_E;
1518                                         break;
1519                         }
1520                         break;
1521                 case SDLA_S507:
1522                         switch (map->mem_start >> 16) {
1523                                 case 0x0A:
1524                                         byte |= SDLA_S507_SEG_A;
1525                                         break;
1526                                 case 0x0B:
1527                                         byte |= SDLA_S507_SEG_B;
1528                                         break;
1529                                 case 0x0C:
1530                                         byte |= SDLA_S507_SEG_C;
1531                                         break;
1532                                 case 0x0E:
1533                                         byte |= SDLA_S507_SEG_E;
1534                                         break;
1535                         }
1536                         break;
1537                 case SDLA_S508:
1538                         switch (map->mem_start >> 16) {
1539                                 case 0x0A:
1540                                         byte |= SDLA_S508_SEG_A;
1541                                         break;
1542                                 case 0x0C:
1543                                         byte |= SDLA_S508_SEG_C;
1544                                         break;
1545                                 case 0x0D:
1546                                         byte |= SDLA_S508_SEG_D;
1547                                         break;
1548                                 case 0x0E:
1549                                         byte |= SDLA_S508_SEG_E;
1550                                         break;
1551                         }
1552                         break;
1553         }
1554
1555         /* set the memory bits, and enable access */
1556         outb(byte, base + SDLA_REG_PC_WINDOW);
1557
1558         switch(flp->type)
1559         {
1560                 case SDLA_S502E:
1561                         flp->state = SDLA_S502E_ENABLE;
1562                         break;
1563                 case SDLA_S507:
1564                         flp->state |= SDLA_MEMEN;
1565                         break;
1566                 case SDLA_S508:
1567                         flp->state = SDLA_MEMEN;
1568                         break;
1569         }
1570         outb(flp->state, base + SDLA_REG_CONTROL);
1571
1572         dev->irq = map->irq;
1573         dev->base_addr = base;
1574         dev->mem_start = map->mem_start;
1575         dev->mem_end = dev->mem_start + 0x2000;
1576         flp->initialized = 1;
1577         return 0;
1578
1579 fail2:
1580         free_irq(map->irq, dev);
1581 fail:
1582         release_region(base, SDLA_IO_EXTENTS);
1583         return err;
1584 }
1585
1586 static const struct net_device_ops sdla_netdev_ops = {
1587         .ndo_open       = sdla_open,
1588         .ndo_stop       = sdla_close,
1589         .ndo_do_ioctl   = sdla_ioctl,
1590         .ndo_set_config = sdla_set_config,
1591         .ndo_start_xmit = sdla_transmit,
1592         .ndo_change_mtu = sdla_change_mtu,
1593 };
1594
1595 static void setup_sdla(struct net_device *dev)
1596 {
1597         struct frad_local *flp = netdev_priv(dev);
1598
1599         netdev_boot_setup_check(dev);
1600
1601         dev->netdev_ops         = &sdla_netdev_ops;
1602         dev->flags              = 0;
1603         dev->type               = 0xFFFF;
1604         dev->hard_header_len    = 0;
1605         dev->addr_len           = 0;
1606         dev->mtu                = SDLA_MAX_MTU;
1607
1608         flp->activate           = sdla_activate;
1609         flp->deactivate         = sdla_deactivate;
1610         flp->assoc              = sdla_assoc;
1611         flp->deassoc            = sdla_deassoc;
1612         flp->dlci_conf          = sdla_dlci_conf;
1613         flp->dev                = dev;
1614
1615         timer_setup(&flp->timer, sdla_poll, 0);
1616         flp->timer.expires      = 1;
1617 }
1618
1619 static struct net_device *sdla;
1620
1621 static int __init init_sdla(void)
1622 {
1623         int err;
1624
1625         printk("%s.\n", version);
1626
1627         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0",
1628                             NET_NAME_UNKNOWN, setup_sdla);
1629         if (!sdla)
1630                 return -ENOMEM;
1631
1632         err = register_netdev(sdla);
1633         if (err)
1634                 free_netdev(sdla);
1635
1636         return err;
1637 }
1638
1639 static void __exit exit_sdla(void)
1640 {
1641         struct frad_local *flp = netdev_priv(sdla);
1642
1643         unregister_netdev(sdla);
1644         if (flp->initialized) {
1645                 free_irq(sdla->irq, sdla);
1646                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1647         }
1648         del_timer_sync(&flp->timer);
1649         free_netdev(sdla);
1650 }
1651
1652 MODULE_LICENSE("GPL");
1653
1654 module_init(init_sdla);
1655 module_exit(exit_sdla);