drivers/net/wan/sdla.c

   1 /*
   2  * SDLA         An implementation of a driver for the Sangoma S502/S508 series
   3  *              multi-protocol PC interface card.  Initial offering is with
   4  *              the DLCI driver, providing Frame Relay support for linux.
   5  *
   6  *              Global definitions for the Frame relay interface.
   7  *
   8  * Version:     @(#)sdla.c   0.30       12 Sep 1996
   9  *
  10  * Credits:     Sangoma Technologies, for the use of 2 cards for an extended
  11  *                      period of time.
  12  *              David Mandelstam <dm@sangoma.com> for getting me started on
  13  *                      this project, and incentive to complete it.
  14  *              Gene Kozen <74604.152@compuserve.com> for providing me with
  15  *                      important information about the cards.
  16  *
  17  * Author:      Mike McLagan <mike.mclagan@linux.org>
  18  *
  19  * Changes:
  20  *              0.15    Mike McLagan    Improved error handling, packet dropping
  21  *              0.20    Mike McLagan    New transmit/receive flags for config
  22  *                                      If in FR mode, don't accept packets from
  23  *                                      non DLCI devices.
  24  *              0.25    Mike McLagan    Fixed problem with rejecting packets
  25  *                                      from non DLCI devices.
  26  *              0.30    Mike McLagan    Fixed kernel panic when used with modified
  27  *                                      ifconfig
  28  *
  29  *              This program is free software; you can redistribute it and/or
  30  *              modify it under the terms of the GNU General Public License
  31  *              as published by the Free Software Foundation; either version
  32  *              2 of the License, or (at your option) any later version.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/kernel.h>
  37 #include <linux/types.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/ptrace.h>
  41 #include <linux/ioport.h>
  42 #include <linux/in.h>
  43 #include <linux/slab.h>
  44 #include <linux/string.h>
  45 #include <linux/timer.h>
  46 #include <linux/errno.h>
  47 #include <linux/init.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/if_arp.h>
  51 #include <linux/if_frad.h>
  52 #include <linux/sdla.h>
  53 #include <linux/bitops.h>
  54
  55 #include <asm/system.h>
  56 #include <asm/io.h>
  57 #include <asm/dma.h>
  58 #include <asm/uaccess.h>
  59
  60 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
  61
  62 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
  63
  64 static unsigned int valid_mem[] = {
  65                                     0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
  66                                     0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
  67                                     0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
  68                                     0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
  69                                     0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000};
  70
  71 static DEFINE_SPINLOCK(sdla_lock);
  72
  73 /*********************************************************
  74  *
  75  * these are the core routines that access the card itself
  76  *
  77  *********************************************************/
  78
  79 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
  80
  81 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
  82 {
  83         char          *temp;
  84         const void    *base;
  85         int           offset, bytes;
  86
  87         temp = buf;
  88         while(len)
  89         {
  90                 offset = addr & SDLA_ADDR_MASK;
  91                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
  92                 base = (const void *) (dev->mem_start + offset);
  93
  94                 SDLA_WINDOW(dev, addr);
  95                 memcpy(temp, base, bytes);
  96
  97                 addr += bytes;
  98                 temp += bytes;
  99                 len  -= bytes;
 100         }
 101 }
 102
 103 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
 104 {
 105         unsigned long flags;
 106         spin_lock_irqsave(&sdla_lock, flags);
 107         __sdla_read(dev, addr, buf, len);
 108         spin_unlock_irqrestore(&sdla_lock, flags);
 109 }
 110
 111 static void __sdla_write(struct net_device *dev, int addr,
 112                          const void *buf, short len)
 113 {
 114         const char    *temp;
 115         void          *base;
 116         int           offset, bytes;
 117
 118         temp = buf;
 119         while(len)
 120         {
 121                 offset = addr & SDLA_ADDR_MASK;
 122                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
 123                 base = (void *) (dev->mem_start + offset);
 124
 125                 SDLA_WINDOW(dev, addr);
 126                 memcpy(base, temp, bytes);
 127
 128                 addr += bytes;
 129                 temp += bytes;
 130                 len  -= bytes;
 131         }
 132 }
 133
 134 static void sdla_write(struct net_device *dev, int addr,
 135                        const void *buf, short len)
 136 {
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&sdla_lock, flags);
 140         __sdla_write(dev, addr, buf, len);
 141         spin_unlock_irqrestore(&sdla_lock, flags);
 142 }
 143
 144
 145 static void sdla_clear(struct net_device *dev)
 146 {
 147         unsigned long flags;
 148         char          *base;
 149         int           len, addr, bytes;
 150
 151         len = 65536;
 152         addr = 0;
 153         bytes = SDLA_WINDOW_SIZE;
 154         base = (void *) dev->mem_start;
 155
 156         spin_lock_irqsave(&sdla_lock, flags);
 157         while(len)
 158         {
 159                 SDLA_WINDOW(dev, addr);
 160                 memset(base, 0, bytes);
 161
 162                 addr += bytes;
 163                 len  -= bytes;
 164         }
 165         spin_unlock_irqrestore(&sdla_lock, flags);
 166
 167 }
 168
 169 static char sdla_byte(struct net_device *dev, int addr)
 170 {
 171         unsigned long flags;
 172         char          byte, *temp;
 173
 174         temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
 175
 176         spin_lock_irqsave(&sdla_lock, flags);
 177         SDLA_WINDOW(dev, addr);
 178         byte = *temp;
 179         spin_unlock_irqrestore(&sdla_lock, flags);
 180
 181         return byte;
 182 }
 183
 184 static void sdla_stop(struct net_device *dev)
 185 {
 186         struct frad_local *flp;
 187
 188         flp = netdev_priv(dev);
 189         switch(flp->type)
 190         {
 191                 case SDLA_S502A:
 192                         outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
 193                         flp->state = SDLA_HALT;
 194                         break;
 195                 case SDLA_S502E:
 196                         outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
 197                         outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
 198                         flp->state = SDLA_S502E_ENABLE;
 199                         break;
 200                 case SDLA_S507:
 201                         flp->state &= ~SDLA_CPUEN;
 202                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 203                         break;
 204                 case SDLA_S508:
 205                         flp->state &= ~SDLA_CPUEN;
 206                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 207                         break;
 208         }
 209 }
 210
 211 static void sdla_start(struct net_device *dev)
 212 {
 213         struct frad_local *flp;
 214
 215         flp = netdev_priv(dev);
 216         switch(flp->type)
 217         {
 218                 case SDLA_S502A:
 219                         outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
 220                         outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
 221                         flp->state = SDLA_S502A_START;
 222                         break;
 223                 case SDLA_S502E:
 224                         outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
 225                         outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
 226                         flp->state = 0;
 227                         break;
 228                 case SDLA_S507:
 229                         flp->state |= SDLA_CPUEN;
 230                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 231                         break;
 232                 case SDLA_S508:
 233                         flp->state |= SDLA_CPUEN;
 234                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 235                         break;
 236         }
 237 }
 238
 239 /****************************************************
 240  *
 241  * this is used for the S502A/E cards to determine
 242  * the speed of the onboard CPU.  Calibration is
 243  * necessary for the Frame Relay code uploaded
 244  * later.  Incorrect results cause timing problems
 245  * with link checks & status messages
 246  *
 247  ***************************************************/
 248
 249 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
 250 {
 251         unsigned long start, done, now;
 252         char          resp, *temp;
 253
 254         start = now = jiffies;
 255         done = jiffies + jiffs;
 256
 257         temp = (void *)dev->mem_start;
 258         temp += z80_addr & SDLA_ADDR_MASK;
 259
 260         resp = ~resp1;
 261         while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
 262         {
 263                 if (jiffies != now)
 264                 {
 265                         SDLA_WINDOW(dev, z80_addr);
 266                         now = jiffies;
 267                         resp = *temp;
 268                 }
 269         }
 270         return time_before(jiffies, done) ? jiffies - start : -1;
 271 }
 272
 273 /* constants for Z80 CPU speed */
 274 #define Z80_READY               '1'     /* Z80 is ready to begin */
 275 #define LOADER_READY            '2'     /* driver is ready to begin */
 276 #define Z80_SCC_OK              '3'     /* SCC is on board */
 277 #define Z80_SCC_BAD             '4'     /* SCC was not found */
 278
 279 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
 280 {
 281         int  jiffs;
 282         char data;
 283
 284         sdla_start(dev);
 285         if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
 286                 return -EIO;
 287
 288         data = LOADER_READY;
 289         sdla_write(dev, 0, &data, 1);
 290
 291         if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
 292                 return -EIO;
 293
 294         sdla_stop(dev);
 295         sdla_read(dev, 0, &data, 1);
 296
 297         if (data == Z80_SCC_BAD)
 298         {
 299                 printk("%s: SCC bad\n", dev->name);
 300                 return -EIO;
 301         }
 302
 303         if (data != Z80_SCC_OK)
 304                 return -EINVAL;
 305
 306         if (jiffs < 165)
 307                 ifr->ifr_mtu = SDLA_CPU_16M;
 308         else if (jiffs < 220)
 309                 ifr->ifr_mtu = SDLA_CPU_10M;
 310         else if (jiffs < 258)
 311                 ifr->ifr_mtu = SDLA_CPU_8M;
 312         else if (jiffs < 357)
 313                 ifr->ifr_mtu = SDLA_CPU_7M;
 314         else if (jiffs < 467)
 315                 ifr->ifr_mtu = SDLA_CPU_5M;
 316         else
 317                 ifr->ifr_mtu = SDLA_CPU_3M;
 318
 319         return 0;
 320 }
 321
 322 /************************************************
 323  *
 324  *  Direct interaction with the Frame Relay code
 325  *  starts here.
 326  *
 327  ************************************************/
 328
 329 struct _dlci_stat
 330 {
 331         short dlci;
 332         char  flags;
 333 } __packed;
 334
 335 struct _frad_stat
 336 {
 337         char    flags;
 338         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 339 };
 340
 341 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
 342 {
 343         struct _dlci_stat *pstatus;
 344         short             *pdlci;
 345         int               i;
 346         char              *state, line[30];
 347
 348         switch (ret)
 349         {
 350                 case SDLA_RET_MODEM:
 351                         state = data;
 352                         if (*state & SDLA_MODEM_DCD_LOW)
 353                                 printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
 354                         if (*state & SDLA_MODEM_CTS_LOW)
 355                                 printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
 356                         /* I should probably do something about this! */
 357                         break;
 358
 359                 case SDLA_RET_CHANNEL_OFF:
 360                         printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
 361                         /* same here */
 362                         break;
 363
 364                 case SDLA_RET_CHANNEL_ON:
 365                         printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
 366                         /* same here */
 367                         break;
 368
 369                 case SDLA_RET_DLCI_STATUS:
 370                         printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
 371                         len /= sizeof(struct _dlci_stat);
 372                         for(pstatus = data, i=0;i < len;i++,pstatus++)
 373                         {
 374                                 if (pstatus->flags & SDLA_DLCI_NEW)
 375                                         state = "new";
 376                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
 377                                         state = "deleted";
 378                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
 379                                         state = "active";
 380                                 else
 381                                 {
 382                                         sprintf(line, "unknown status: %02X", pstatus->flags);
 383                                         state = line;
 384                                 }
 385                                 printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
 386                                 /* same here */
 387                         }
 388                         break;
 389
 390                 case SDLA_RET_DLCI_UNKNOWN:
 391                         printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
 392                         len /= sizeof(short);
 393                         for(pdlci = data,i=0;i < len;i++,pdlci++)
 394                                 printk(" %i", *pdlci);
 395                         printk("\n");
 396                         break;
 397
 398                 case SDLA_RET_TIMEOUT:
 399                         printk(KERN_ERR "%s: Command timed out!\n", dev->name);
 400                         break;
 401
 402                 case SDLA_RET_BUF_OVERSIZE:
 403                         printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
 404                         break;
 405
 406                 case SDLA_RET_BUF_TOO_BIG:
 407                         printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
 408                         break;
 409
 410                 case SDLA_RET_CHANNEL_INACTIVE:
 411                 case SDLA_RET_DLCI_INACTIVE:
 412                 case SDLA_RET_CIR_OVERFLOW:
 413                 case SDLA_RET_NO_BUFS:
 414                         if (cmd == SDLA_INFORMATION_WRITE)
 415                                 break;
 416
 417                 default:
 418                         printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
 419                         /* Further processing could be done here */
 420                         break;
 421         }
 422 }
 423
 424 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
 425                         void *inbuf, short inlen, void *outbuf, short *outlen)
 426 {
 427         static struct _frad_stat status;
 428         struct frad_local        *flp;
 429         struct sdla_cmd          *cmd_buf;
 430         unsigned long            pflags;
 431         unsigned long            jiffs;
 432         int                      ret, waiting, len;
 433         long                     window;
 434
 435         flp = netdev_priv(dev);
 436         window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
 437         cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
 438         ret = 0;
 439         len = 0;
 440         jiffs = jiffies + HZ;  /* 1 second is plenty */
 441
 442         spin_lock_irqsave(&sdla_lock, pflags);
 443         SDLA_WINDOW(dev, window);
 444         cmd_buf->cmd = cmd;
 445         cmd_buf->dlci = dlci;
 446         cmd_buf->flags = flags;
 447
 448         if (inbuf)
 449                 memcpy(cmd_buf->data, inbuf, inlen);
 450
 451         cmd_buf->length = inlen;
 452
 453         cmd_buf->opp_flag = 1;
 454         spin_unlock_irqrestore(&sdla_lock, pflags);
 455
 456         waiting = 1;
 457         len = 0;
 458         while (waiting && time_before_eq(jiffies, jiffs))
 459         {
 460                 if (waiting++ % 3)
 461                 {
 462                         spin_lock_irqsave(&sdla_lock, pflags);
 463                         SDLA_WINDOW(dev, window);
 464                         waiting = ((volatile int)(cmd_buf->opp_flag));
 465                         spin_unlock_irqrestore(&sdla_lock, pflags);
 466                 }
 467         }
 468
 469         if (!waiting)
 470         {
 471
 472                 spin_lock_irqsave(&sdla_lock, pflags);
 473                 SDLA_WINDOW(dev, window);
 474                 ret = cmd_buf->retval;
 475                 len = cmd_buf->length;
 476                 if (outbuf && outlen)
 477                 {
 478                         *outlen = *outlen >= len ? len : *outlen;
 479
 480                         if (*outlen)
 481                                 memcpy(outbuf, cmd_buf->data, *outlen);
 482                 }
 483
 484                 /* This is a local copy that's used for error handling */
 485                 if (ret)
 486                         memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
 487
 488                 spin_unlock_irqrestore(&sdla_lock, pflags);
 489         }
 490         else
 491                 ret = SDLA_RET_TIMEOUT;
 492
 493         if (ret != SDLA_RET_OK)
 494                 sdla_errors(dev, cmd, dlci, ret, len, &status);
 495
 496         return ret;
 497 }
 498
 499 /***********************************************
 500  *
 501  * these functions are called by the DLCI driver
 502  *
 503  ***********************************************/
 504
 505 static int sdla_reconfig(struct net_device *dev);
 506
 507 static int sdla_activate(struct net_device *slave, struct net_device *master)
 508 {
 509         struct frad_local *flp;
 510         int i;
 511
 512         flp = netdev_priv(slave);
 513
 514         for(i=0;i<CONFIG_DLCI_MAX;i++)
 515                 if (flp->master[i] == master)
 516                         break;
 517
 518         if (i == CONFIG_DLCI_MAX)
 519                 return -ENODEV;
 520
 521         flp->dlci[i] = abs(flp->dlci[i]);
 522
 523         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 524                 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 525
 526         return 0;
 527 }
 528
 529 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
 530 {
 531         struct frad_local *flp;
 532         int               i;
 533
 534         flp = netdev_priv(slave);
 535
 536         for(i=0;i<CONFIG_DLCI_MAX;i++)
 537                 if (flp->master[i] == master)
 538                         break;
 539
 540         if (i == CONFIG_DLCI_MAX)
 541                 return -ENODEV;
 542
 543         flp->dlci[i] = -abs(flp->dlci[i]);
 544
 545         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
 546                 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
 547
 548         return 0;
 549 }
 550
 551 static int sdla_assoc(struct net_device *slave, struct net_device *master)
 552 {
 553         struct frad_local *flp;
 554         int               i;
 555
 556         if (master->type != ARPHRD_DLCI)
 557                 return -EINVAL;
 558
 559         flp = netdev_priv(slave);
 560
 561         for(i=0;i<CONFIG_DLCI_MAX;i++)
 562         {
 563                 if (!flp->master[i])
 564                         break;
 565                 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
 566                         return -EADDRINUSE;
 567         }
 568
 569         if (i == CONFIG_DLCI_MAX)
 570                 return -EMLINK;  /* #### Alan: Comments on this ?? */
 571
 572
 573         flp->master[i] = master;
 574         flp->dlci[i] = -*(short *)(master->dev_addr);
 575         master->mtu = slave->mtu;
 576
 577         if (netif_running(slave)) {
 578                 if (flp->config.station == FRAD_STATION_CPE)
 579                         sdla_reconfig(slave);
 580                 else
 581                         sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 582         }
 583
 584         return 0;
 585 }
 586
 587 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
 588 {
 589         struct frad_local *flp;
 590         int               i;
 591
 592         flp = netdev_priv(slave);
 593
 594         for(i=0;i<CONFIG_DLCI_MAX;i++)
 595                 if (flp->master[i] == master)
 596                         break;
 597
 598         if (i == CONFIG_DLCI_MAX)
 599                 return -ENODEV;
 600
 601         flp->master[i] = NULL;
 602         flp->dlci[i] = 0;
 603
 604
 605         if (netif_running(slave)) {
 606                 if (flp->config.station == FRAD_STATION_CPE)
 607                         sdla_reconfig(slave);
 608                 else
 609                         sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
 610         }
 611
 612         return 0;
 613 }
 614
 615 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
 616 {
 617         struct frad_local *flp;
 618         struct dlci_local *dlp;
 619         int               i;
 620         short             len, ret;
 621
 622         flp = netdev_priv(slave);
 623
 624         for(i=0;i<CONFIG_DLCI_MAX;i++)
 625                 if (flp->master[i] == master)
 626                         break;
 627
 628         if (i == CONFIG_DLCI_MAX)
 629                 return -ENODEV;
 630
 631         dlp = netdev_priv(master);
 632
 633         ret = SDLA_RET_OK;
 634         len = sizeof(struct dlci_conf);
 635         if (netif_running(slave)) {
 636                 if (get)
 637                         ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 638                                     NULL, 0, &dlp->config, &len);
 639                 else
 640                         ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
 641                                     &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
 642         }
 643
 644         return ret == SDLA_RET_OK ? 0 : -EIO;
 645 }
 646
 647 /**************************
 648  *
 649  * now for the Linux driver
 650  *
 651  **************************/
 652
 653 /* NOTE: the DLCI driver deals with freeing the SKB!! */
 654 static netdev_tx_t sdla_transmit(struct sk_buff *skb,
 655                                  struct net_device *dev)
 656 {
 657         struct frad_local *flp;
 658         int               ret, addr, accept, i;
 659         short             size;
 660         unsigned long     flags;
 661         struct buf_entry  *pbuf;
 662
 663         flp = netdev_priv(dev);
 664         ret = 0;
 665         accept = 1;
 666
 667         netif_stop_queue(dev);
 668
 669         /*
 670          * stupid GateD insists on setting up the multicast router thru us
 671          * and we're ill equipped to handle a non Frame Relay packet at this
 672          * time!
 673          */
 674
 675         accept = 1;
 676         switch (dev->type)
 677         {
 678                 case ARPHRD_FRAD:
 679                         if (skb->dev->type != ARPHRD_DLCI)
 680                         {
 681                                 printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
 682                                 accept = 0;
 683                         }
 684                         break;
 685                 default:
 686                         printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
 687                         accept = 0;
 688                         break;
 689         }
 690         if (accept)
 691         {
 692                 /* this is frame specific, but till there's a PPP module, it's the default */
 693                 switch (flp->type)
 694                 {
 695                         case SDLA_S502A:
 696                         case SDLA_S502E:
 697                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 698                                 break;
 699                                 case SDLA_S508:
 700                                 size = sizeof(addr);
 701                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 702                                 if (ret == SDLA_RET_OK)
 703                                 {
 704
 705                                         spin_lock_irqsave(&sdla_lock, flags);
 706                                         SDLA_WINDOW(dev, addr);
 707                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 708                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 709                                         SDLA_WINDOW(dev, addr);
 710                                         pbuf->opp_flag = 1;
 711                                         spin_unlock_irqrestore(&sdla_lock, flags);
 712                                 }
 713                                 break;
 714                 }
 715
 716                 switch (ret)
 717                 {
 718                         case SDLA_RET_OK:
 719                                 dev->stats.tx_packets++;
 720                                 break;
 721
 722                         case SDLA_RET_CIR_OVERFLOW:
 723                         case SDLA_RET_BUF_OVERSIZE:
 724                         case SDLA_RET_NO_BUFS:
 725                                 dev->stats.tx_dropped++;
 726                                 break;
 727
 728                         default:
 729                                 dev->stats.tx_errors++;
 730                                 break;
 731                 }
 732         }
 733         netif_wake_queue(dev);
 734         for(i=0;i<CONFIG_DLCI_MAX;i++)
 735         {
 736                 if(flp->master[i]!=NULL)
 737                         netif_wake_queue(flp->master[i]);
 738         }
 739
 740         dev_kfree_skb(skb);
 741         return NETDEV_TX_OK;
 742 }
 743
 744 static void sdla_receive(struct net_device *dev)
 745 {
 746         struct net_device         *master;
 747         struct frad_local *flp;
 748         struct dlci_local *dlp;
 749         struct sk_buff   *skb;
 750
 751         struct sdla_cmd *cmd;
 752         struct buf_info *pbufi;
 753         struct buf_entry  *pbuf;
 754
 755         unsigned long     flags;
 756         int               i=0, received, success, addr, buf_base, buf_top;
 757         short             dlci, len, len2, split;
 758
 759         flp = netdev_priv(dev);
 760         success = 1;
 761         received = addr = buf_top = buf_base = 0;
 762         len = dlci = 0;
 763         skb = NULL;
 764         master = NULL;
 765         cmd = NULL;
 766         pbufi = NULL;
 767         pbuf = NULL;
 768
 769         spin_lock_irqsave(&sdla_lock, flags);
 770
 771         switch (flp->type)
 772         {
 773                 case SDLA_S502A:
 774                 case SDLA_S502E:
 775                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 776                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 777                         success = cmd->opp_flag;
 778                         if (!success)
 779                                 break;
 780
 781                         dlci = cmd->dlci;
 782                         len = cmd->length;
 783                         break;
 784
 785                 case SDLA_S508:
 786                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 787                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 788                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 789                         success = pbuf->opp_flag;
 790                         if (!success)
 791                                 break;
 792
 793                         buf_top = pbufi->buf_top;
 794                         buf_base = pbufi->buf_base;
 795                         dlci = pbuf->dlci;
 796                         len = pbuf->length;
 797                         addr = pbuf->buf_addr;
 798                         break;
 799         }
 800
 801         /* common code, find the DLCI and get the SKB */
 802         if (success)
 803         {
 804                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 805                         if (flp->dlci[i] == dlci)
 806                                 break;
 807
 808                 if (i == CONFIG_DLCI_MAX)
 809                 {
 810                         printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
 811                         dev->stats.rx_errors++;
 812                         success = 0;
 813                 }
 814         }
 815
 816         if (success)
 817         {
 818                 master = flp->master[i];
 819                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 820                 if (skb == NULL)
 821                 {
 822                         printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 823                         dev->stats.rx_dropped++;
 824                         success = 0;
 825                 }
 826                 else
 827                         skb_reserve(skb, sizeof(struct frhdr));
 828         }
 829
 830         /* pick up the data */
 831         switch (flp->type)
 832         {
 833                 case SDLA_S502A:
 834                 case SDLA_S502E:
 835                         if (success)
 836                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 837
 838                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 839                         cmd->opp_flag = 0;
 840                         break;
 841
 842                 case SDLA_S508:
 843                         if (success)
 844                         {
 845                                 /* is this buffer split off the end of the internal ring buffer */
 846                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 847                                 len2 = len - split;
 848
 849                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 850                                 if (split)
 851                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 852                         }
 853
 854                         /* increment the buffer we're looking at */
 855                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 856                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 857                         pbuf->opp_flag = 0;
 858                         break;
 859         }
 860
 861         if (success)
 862         {
 863                 dev->stats.rx_packets++;
 864                 dlp = netdev_priv(master);
 865                 (*dlp->receive)(skb, master);
 866         }
 867
 868         spin_unlock_irqrestore(&sdla_lock, flags);
 869 }
 870
 871 static irqreturn_t sdla_isr(int dummy, void *dev_id)
 872 {
 873         struct net_device     *dev;
 874         struct frad_local *flp;
 875         char              byte;
 876
 877         dev = dev_id;
 878
 879         flp = netdev_priv(dev);
 880
 881         if (!flp->initialized)
 882         {
 883                 printk(KERN_WARNING "%s: irq %d for uninitialized device.\n",
 884                        dev->name, dev->irq);
 885                 return IRQ_NONE;
 886         }
 887
 888         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 889         switch (byte)
 890         {
 891                 case SDLA_INTR_RX:
 892                         sdla_receive(dev);
 893                         break;
 894
 895                 /* the command will get an error return, which is processed above */
 896                 case SDLA_INTR_MODEM:
 897                 case SDLA_INTR_STATUS:
 898                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 899                         break;
 900
 901                 case SDLA_INTR_TX:
 902                 case SDLA_INTR_COMPLETE:
 903                 case SDLA_INTR_TIMER:
 904                         printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
 905                         break;
 906         }
 907
 908         /* the S502E requires a manual acknowledgement of the interrupt */
 909         if (flp->type == SDLA_S502E)
 910         {
 911                 flp->state &= ~SDLA_S502E_INTACK;
 912                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 913                 flp->state |= SDLA_S502E_INTACK;
 914                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 915         }
 916
 917         /* this clears the byte, informing the Z80 we're done */
 918         byte = 0;
 919         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 920         return IRQ_HANDLED;
 921 }
 922
 923 static void sdla_poll(unsigned long device)
 924 {
 925         struct net_device         *dev;
 926         struct frad_local *flp;
 927
 928         dev = (struct net_device *) device;
 929         flp = netdev_priv(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         struct frad_local *flp;
1319
1320         flp = netdev_priv(dev);
1321
1322         if (netif_running(dev))
1323                 return -EBUSY;
1324
1325         /* for now, you can't change the MTU! */
1326         return -EOPNOTSUPP;
1327 }
1328
1329 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1330 {
1331         struct frad_local *flp;
1332         int               i;
1333         char              byte;
1334         unsigned base;
1335         int err = -EINVAL;
1336
1337         flp = netdev_priv(dev);
1338
1339         if (flp->initialized)
1340                 return -EINVAL;
1341
1342         for(i=0; i < ARRAY_SIZE(valid_port); i++)
1343                 if (valid_port[i] == map->base_addr)
1344                         break;
1345
1346         if (i == ARRAY_SIZE(valid_port))
1347                 return -EINVAL;
1348
1349         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1350                 printk(KERN_WARNING "SDLA: io-port 0x%04lx in use\n", dev->base_addr);
1351                 return -EINVAL;
1352         }
1353         base = map->base_addr;
1354
1355         /* test for card types, S502A, S502E, S507, S508                 */
1356         /* these tests shut down the card completely, so clear the state */
1357         flp->type = SDLA_UNKNOWN;
1358         flp->state = 0;
1359
1360         for(i=1;i<SDLA_IO_EXTENTS;i++)
1361                 if (inb(base + i) != 0xFF)
1362                         break;
1363
1364         if (i == SDLA_IO_EXTENTS) {
1365                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1366                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1367                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1368                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1369                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1370                                 flp->type = SDLA_S502E;
1371                                 goto got_type;
1372                         }
1373                 }
1374         }
1375
1376         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1377                 if (inb(base + i) != byte)
1378                         break;
1379
1380         if (i == SDLA_IO_EXTENTS) {
1381                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1382                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1383                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1384                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1385                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1386                                 flp->type = SDLA_S507;
1387                                 goto got_type;
1388                         }
1389                 }
1390         }
1391
1392         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1393         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1394                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1395                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1396                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1397                         flp->type = SDLA_S508;
1398                         goto got_type;
1399                 }
1400         }
1401
1402         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1403         if (inb(base + SDLA_S502_STS) == 0x40) {
1404                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1405                 if (inb(base + SDLA_S502_STS) == 0x40) {
1406                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1407                         if (inb(base + SDLA_S502_STS) == 0x44) {
1408                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1409                                 flp->type = SDLA_S502A;
1410                                 goto got_type;
1411                         }
1412                 }
1413         }
1414
1415         printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1416         err = -ENODEV;
1417         goto fail;
1418
1419 got_type:
1420         switch(base) {
1421                 case 0x270:
1422                 case 0x280:
1423                 case 0x380:
1424                 case 0x390:
1425                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1426                                 goto fail;
1427         }
1428
1429         switch (map->irq) {
1430                 case 2:
1431                         if (flp->type != SDLA_S502E)
1432                                 goto fail;
1433                         break;
1434
1435                 case 10:
1436                 case 11:
1437                 case 12:
1438                 case 15:
1439                 case 4:
1440                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1441                                 goto fail;
1442                         break;
1443                 case 3:
1444                 case 5:
1445                 case 7:
1446                         if (flp->type == SDLA_S502A)
1447                                 goto fail;
1448                         break;
1449
1450                 default:
1451                         goto fail;
1452         }
1453
1454         err = -EAGAIN;
1455         if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev))
1456                 goto fail;
1457
1458         if (flp->type == SDLA_S507) {
1459                 switch(dev->irq) {
1460                         case 3:
1461                                 flp->state = SDLA_S507_IRQ3;
1462                                 break;
1463                         case 4:
1464                                 flp->state = SDLA_S507_IRQ4;
1465                                 break;
1466                         case 5:
1467                                 flp->state = SDLA_S507_IRQ5;
1468                                 break;
1469                         case 7:
1470                                 flp->state = SDLA_S507_IRQ7;
1471                                 break;
1472                         case 10:
1473                                 flp->state = SDLA_S507_IRQ10;
1474                                 break;
1475                         case 11:
1476                                 flp->state = SDLA_S507_IRQ11;
1477                                 break;
1478                         case 12:
1479                                 flp->state = SDLA_S507_IRQ12;
1480                                 break;
1481                         case 15:
1482                                 flp->state = SDLA_S507_IRQ15;
1483                                 break;
1484                 }
1485         }
1486
1487         for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1488                 if (valid_mem[i] == map->mem_start)
1489                         break;
1490
1491         err = -EINVAL;
1492         if (i == ARRAY_SIZE(valid_mem))
1493                 goto fail2;
1494
1495         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1496                 goto fail2;
1497
1498         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1499                 goto fail2;
1500
1501         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1502                 goto fail2;
1503
1504         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1505         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1506         switch(flp->type) {
1507                 case SDLA_S502A:
1508                 case SDLA_S502E:
1509                         switch (map->mem_start >> 16) {
1510                                 case 0x0A:
1511                                         byte |= SDLA_S502_SEG_A;
1512                                         break;
1513                                 case 0x0C:
1514                                         byte |= SDLA_S502_SEG_C;
1515                                         break;
1516                                 case 0x0D:
1517                                         byte |= SDLA_S502_SEG_D;
1518                                         break;
1519                                 case 0x0E:
1520                                         byte |= SDLA_S502_SEG_E;
1521                                         break;
1522                         }
1523                         break;
1524                 case SDLA_S507:
1525                         switch (map->mem_start >> 16) {
1526                                 case 0x0A:
1527                                         byte |= SDLA_S507_SEG_A;
1528                                         break;
1529                                 case 0x0B:
1530                                         byte |= SDLA_S507_SEG_B;
1531                                         break;
1532                                 case 0x0C:
1533                                         byte |= SDLA_S507_SEG_C;
1534                                         break;
1535                                 case 0x0E:
1536                                         byte |= SDLA_S507_SEG_E;
1537                                         break;
1538                         }
1539                         break;
1540                 case SDLA_S508:
1541                         switch (map->mem_start >> 16) {
1542                                 case 0x0A:
1543                                         byte |= SDLA_S508_SEG_A;
1544                                         break;
1545                                 case 0x0C:
1546                                         byte |= SDLA_S508_SEG_C;
1547                                         break;
1548                                 case 0x0D:
1549                                         byte |= SDLA_S508_SEG_D;
1550                                         break;
1551                                 case 0x0E:
1552                                         byte |= SDLA_S508_SEG_E;
1553                                         break;
1554                         }
1555                         break;
1556         }
1557
1558         /* set the memory bits, and enable access */
1559         outb(byte, base + SDLA_REG_PC_WINDOW);
1560
1561         switch(flp->type)
1562         {
1563                 case SDLA_S502E:
1564                         flp->state = SDLA_S502E_ENABLE;
1565                         break;
1566                 case SDLA_S507:
1567                         flp->state |= SDLA_MEMEN;
1568                         break;
1569                 case SDLA_S508:
1570                         flp->state = SDLA_MEMEN;
1571                         break;
1572         }
1573         outb(flp->state, base + SDLA_REG_CONTROL);
1574
1575         dev->irq = map->irq;
1576         dev->base_addr = base;
1577         dev->mem_start = map->mem_start;
1578         dev->mem_end = dev->mem_start + 0x2000;
1579         flp->initialized = 1;
1580         return 0;
1581
1582 fail2:
1583         free_irq(map->irq, dev);
1584 fail:
1585         release_region(base, SDLA_IO_EXTENTS);
1586         return err;
1587 }
1588
1589 static const struct net_device_ops sdla_netdev_ops = {
1590         .ndo_open       = sdla_open,
1591         .ndo_stop       = sdla_close,
1592         .ndo_do_ioctl   = sdla_ioctl,
1593         .ndo_set_config = sdla_set_config,
1594         .ndo_start_xmit = sdla_transmit,
1595         .ndo_change_mtu = sdla_change_mtu,
1596 };
1597
1598 static void setup_sdla(struct net_device *dev)
1599 {
1600         struct frad_local *flp = netdev_priv(dev);
1601
1602         netdev_boot_setup_check(dev);
1603
1604         dev->netdev_ops         = &sdla_netdev_ops;
1605         dev->flags              = 0;
1606         dev->type               = 0xFFFF;
1607         dev->hard_header_len    = 0;
1608         dev->addr_len           = 0;
1609         dev->mtu                = SDLA_MAX_MTU;
1610
1611         flp->activate           = sdla_activate;
1612         flp->deactivate         = sdla_deactivate;
1613         flp->assoc              = sdla_assoc;
1614         flp->deassoc            = sdla_deassoc;
1615         flp->dlci_conf          = sdla_dlci_conf;
1616
1617         init_timer(&flp->timer);
1618         flp->timer.expires      = 1;
1619         flp->timer.data         = (unsigned long) dev;
1620         flp->timer.function     = sdla_poll;
1621 }
1622
1623 static struct net_device *sdla;
1624
1625 static int __init init_sdla(void)
1626 {
1627         int err;
1628
1629         printk("%s.\n", version);
1630
1631         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
1632         if (!sdla)
1633                 return -ENOMEM;
1634
1635         err = register_netdev(sdla);
1636         if (err)
1637                 free_netdev(sdla);
1638
1639         return err;
1640 }
1641
1642 static void __exit exit_sdla(void)
1643 {
1644         struct frad_local *flp = netdev_priv(sdla);
1645
1646         unregister_netdev(sdla);
1647         if (flp->initialized) {
1648                 free_irq(sdla->irq, sdla);
1649                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1650         }
1651         del_timer_sync(&flp->timer);
1652         free_netdev(sdla);
1653 }
1654
1655 MODULE_LICENSE("GPL");
1656
1657 module_init(init_sdla);
1658 module_exit(exit_sdla);