git.oblomov.eu Git - linux-2.6/blob - drivers/net/wan/sdla.c

   1 /*
   2  * SDLA         An implementation of a driver for the Sangoma S502/S508 series
   3  *              multi-protocol PC interface card.  Initial offering is with
   4  *              the DLCI driver, providing Frame Relay support for linux.
   5  *
   6  *              Global definitions for the Frame relay interface.
   7  *
   8  * Version:     @(#)sdla.c   0.30       12 Sep 1996
   9  *
  10  * Credits:     Sangoma Technologies, for the use of 2 cards for an extended
  11  *                      period of time.
  12  *              David Mandelstam <dm@sangoma.com> for getting me started on
  13  *                      this project, and incentive to complete it.
  14  *              Gene Kozen <74604.152@compuserve.com> for providing me with
  15  *                      important information about the cards.
  16  *
  17  * Author:      Mike McLagan <mike.mclagan@linux.org>
  18  *
  19  * Changes:
  20  *              0.15    Mike McLagan    Improved error handling, packet dropping
  21  *              0.20    Mike McLagan    New transmit/receive flags for config
  22  *                                      If in FR mode, don't accept packets from
  23  *                                      non DLCI devices.
  24  *              0.25    Mike McLagan    Fixed problem with rejecting packets
  25  *                                      from non DLCI devices.
  26  *              0.30    Mike McLagan    Fixed kernel panic when used with modified
  27  *                                      ifconfig
  28  *
  29  *              This program is free software; you can redistribute it and/or
  30  *              modify it under the terms of the GNU General Public License
  31  *              as published by the Free Software Foundation; either version
  32  *              2 of the License, or (at your option) any later version.
  33  */
  34
  35 #include <linux/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 } __attribute__((packed));
 334
 335 struct _frad_stat
 336 {
 337         char    flags;
 338         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
 339 };
 340
 341 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
 342 {
 343         struct _dlci_stat *pstatus;
 344         short             *pdlci;
 345         int               i;
 346         char              *state, line[30];
 347
 348         switch (ret)
 349         {
 350                 case SDLA_RET_MODEM:
 351                         state = data;
 352                         if (*state & SDLA_MODEM_DCD_LOW)
 353                                 printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
 354                         if (*state & SDLA_MODEM_CTS_LOW)
 355                                 printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
 356                         /* I should probably do something about this! */
 357                         break;
 358
 359                 case SDLA_RET_CHANNEL_OFF:
 360                         printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
 361                         /* same here */
 362                         break;
 363
 364                 case SDLA_RET_CHANNEL_ON:
 365                         printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
 366                         /* same here */
 367                         break;
 368
 369                 case SDLA_RET_DLCI_STATUS:
 370                         printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
 371                         len /= sizeof(struct _dlci_stat);
 372                         for(pstatus = data, i=0;i < len;i++,pstatus++)
 373                         {
 374                                 if (pstatus->flags & SDLA_DLCI_NEW)
 375                                         state = "new";
 376                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
 377                                         state = "deleted";
 378                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
 379                                         state = "active";
 380                                 else
 381                                 {
 382                                         sprintf(line, "unknown status: %02X", pstatus->flags);
 383                                         state = line;
 384                                 }
 385                                 printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
 386                                 /* same here */
 387                         }
 388                         break;
 389
 390                 case SDLA_RET_DLCI_UNKNOWN:
 391                         printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
 392                         len /= sizeof(short);
 393                         for(pdlci = data,i=0;i < len;i++,pdlci++)
 394                                 printk(" %i", *pdlci);
 395                         printk("\n");
 396                         break;
 397
 398                 case SDLA_RET_TIMEOUT:
 399                         printk(KERN_ERR "%s: Command timed out!\n", dev->name);
 400                         break;
 401
 402                 case SDLA_RET_BUF_OVERSIZE:
 403                         printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
 404                         break;
 405
 406                 case SDLA_RET_BUF_TOO_BIG:
 407                         printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
 408                         break;
 409
 410                 case SDLA_RET_CHANNEL_INACTIVE:
 411                 case SDLA_RET_DLCI_INACTIVE:
 412                 case SDLA_RET_CIR_OVERFLOW:
 413                 case SDLA_RET_NO_BUFS:
 414                         if (cmd == SDLA_INFORMATION_WRITE)
 415                                 break;
 416
 417                 default:
 418                         printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
 419                         /* Further processing could be done here */
 420                         break;
 421         }
 422 }
 423
 424 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
 425                         void *inbuf, short inlen, void *outbuf, short *outlen)
 426 {
 427         static struct _frad_stat status;
 428         struct frad_local        *flp;
 429         struct sdla_cmd          *cmd_buf;
 430         unsigned long            pflags;
 431         unsigned long            jiffs;
 432         int                      ret, waiting, len;
 433         long                     window;
 434
 435         flp = 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 int sdla_transmit(struct sk_buff *skb, struct net_device *dev)
 655 {
 656         struct frad_local *flp;
 657         int               ret, addr, accept, i;
 658         short             size;
 659         unsigned long     flags;
 660         struct buf_entry  *pbuf;
 661
 662         flp = netdev_priv(dev);
 663         ret = 0;
 664         accept = 1;
 665
 666         netif_stop_queue(dev);
 667
 668         /*
 669          * stupid GateD insists on setting up the multicast router thru us
 670          * and we're ill equipped to handle a non Frame Relay packet at this
 671          * time!
 672          */
 673
 674         accept = 1;
 675         switch (dev->type)
 676         {
 677                 case ARPHRD_FRAD:
 678                         if (skb->dev->type != ARPHRD_DLCI)
 679                         {
 680                                 printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
 681                                 accept = 0;
 682                         }
 683                         break;
 684                 default:
 685                         printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
 686                         accept = 0;
 687                         break;
 688         }
 689         if (accept)
 690         {
 691                 /* this is frame specific, but till there's a PPP module, it's the default */
 692                 switch (flp->type)
 693                 {
 694                         case SDLA_S502A:
 695                         case SDLA_S502E:
 696                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
 697                                 break;
 698                                 case SDLA_S508:
 699                                 size = sizeof(addr);
 700                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
 701                                 if (ret == SDLA_RET_OK)
 702                                 {
 703
 704                                         spin_lock_irqsave(&sdla_lock, flags);
 705                                         SDLA_WINDOW(dev, addr);
 706                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
 707                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
 708                                         SDLA_WINDOW(dev, addr);
 709                                         pbuf->opp_flag = 1;
 710                                         spin_unlock_irqrestore(&sdla_lock, flags);
 711                                 }
 712                                 break;
 713                 }
 714                 switch (ret)
 715                 {
 716                         case SDLA_RET_OK:
 717                                 flp->stats.tx_packets++;
 718                                 ret = DLCI_RET_OK;
 719                                 break;
 720
 721                         case SDLA_RET_CIR_OVERFLOW:
 722                         case SDLA_RET_BUF_OVERSIZE:
 723                         case SDLA_RET_NO_BUFS:
 724                                 flp->stats.tx_dropped++;
 725                                 ret = DLCI_RET_DROP;
 726                                 break;
 727
 728                         default:
 729                                 flp->stats.tx_errors++;
 730                                 ret = DLCI_RET_ERR;
 731                                 break;
 732                 }
 733         }
 734         netif_wake_queue(dev);
 735         for(i=0;i<CONFIG_DLCI_MAX;i++)
 736         {
 737                 if(flp->master[i]!=NULL)
 738                         netif_wake_queue(flp->master[i]);
 739         }
 740         return(ret);
 741 }
 742
 743 static void sdla_receive(struct net_device *dev)
 744 {
 745         struct net_device         *master;
 746         struct frad_local *flp;
 747         struct dlci_local *dlp;
 748         struct sk_buff   *skb;
 749
 750         struct sdla_cmd *cmd;
 751         struct buf_info *pbufi;
 752         struct buf_entry  *pbuf;
 753
 754         unsigned long     flags;
 755         int               i=0, received, success, addr, buf_base, buf_top;
 756         short             dlci, len, len2, split;
 757
 758         flp = netdev_priv(dev);
 759         success = 1;
 760         received = addr = buf_top = buf_base = 0;
 761         len = dlci = 0;
 762         skb = NULL;
 763         master = NULL;
 764         cmd = NULL;
 765         pbufi = NULL;
 766         pbuf = NULL;
 767
 768         spin_lock_irqsave(&sdla_lock, flags);
 769
 770         switch (flp->type)
 771         {
 772                 case SDLA_S502A:
 773                 case SDLA_S502E:
 774                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
 775                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 776                         success = cmd->opp_flag;
 777                         if (!success)
 778                                 break;
 779
 780                         dlci = cmd->dlci;
 781                         len = cmd->length;
 782                         break;
 783
 784                 case SDLA_S508:
 785                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
 786                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 787                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
 788                         success = pbuf->opp_flag;
 789                         if (!success)
 790                                 break;
 791
 792                         buf_top = pbufi->buf_top;
 793                         buf_base = pbufi->buf_base;
 794                         dlci = pbuf->dlci;
 795                         len = pbuf->length;
 796                         addr = pbuf->buf_addr;
 797                         break;
 798         }
 799
 800         /* common code, find the DLCI and get the SKB */
 801         if (success)
 802         {
 803                 for (i=0;i<CONFIG_DLCI_MAX;i++)
 804                         if (flp->dlci[i] == dlci)
 805                                 break;
 806
 807                 if (i == CONFIG_DLCI_MAX)
 808                 {
 809                         printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
 810                         flp->stats.rx_errors++;
 811                         success = 0;
 812                 }
 813         }
 814
 815         if (success)
 816         {
 817                 master = flp->master[i];
 818                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
 819                 if (skb == NULL)
 820                 {
 821                         printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 822                         flp->stats.rx_dropped++;
 823                         success = 0;
 824                 }
 825                 else
 826                         skb_reserve(skb, sizeof(struct frhdr));
 827         }
 828
 829         /* pick up the data */
 830         switch (flp->type)
 831         {
 832                 case SDLA_S502A:
 833                 case SDLA_S502E:
 834                         if (success)
 835                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
 836
 837                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
 838                         cmd->opp_flag = 0;
 839                         break;
 840
 841                 case SDLA_S508:
 842                         if (success)
 843                         {
 844                                 /* is this buffer split off the end of the internal ring buffer */
 845                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
 846                                 len2 = len - split;
 847
 848                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
 849                                 if (split)
 850                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
 851                         }
 852
 853                         /* increment the buffer we're looking at */
 854                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
 855                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
 856                         pbuf->opp_flag = 0;
 857                         break;
 858         }
 859
 860         if (success)
 861         {
 862                 flp->stats.rx_packets++;
 863                 dlp = netdev_priv(master);
 864                 (*dlp->receive)(skb, master);
 865         }
 866
 867         spin_unlock_irqrestore(&sdla_lock, flags);
 868 }
 869
 870 static irqreturn_t sdla_isr(int dummy, void *dev_id)
 871 {
 872         struct net_device     *dev;
 873         struct frad_local *flp;
 874         char              byte;
 875
 876         dev = dev_id;
 877
 878         flp = netdev_priv(dev);
 879
 880         if (!flp->initialized)
 881         {
 882                 printk(KERN_WARNING "%s: irq %d for uninitialized device.\n",
 883                        dev->name, dev->irq);
 884                 return IRQ_NONE;
 885         }
 886
 887         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
 888         switch (byte)
 889         {
 890                 case SDLA_INTR_RX:
 891                         sdla_receive(dev);
 892                         break;
 893
 894                 /* the command will get an error return, which is processed above */
 895                 case SDLA_INTR_MODEM:
 896                 case SDLA_INTR_STATUS:
 897                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
 898                         break;
 899
 900                 case SDLA_INTR_TX:
 901                 case SDLA_INTR_COMPLETE:
 902                 case SDLA_INTR_TIMER:
 903                         printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
 904                         break;
 905         }
 906
 907         /* the S502E requires a manual acknowledgement of the interrupt */
 908         if (flp->type == SDLA_S502E)
 909         {
 910                 flp->state &= ~SDLA_S502E_INTACK;
 911                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 912                 flp->state |= SDLA_S502E_INTACK;
 913                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 914         }
 915
 916         /* this clears the byte, informing the Z80 we're done */
 917         byte = 0;
 918         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
 919         return IRQ_HANDLED;
 920 }
 921
 922 static void sdla_poll(unsigned long device)
 923 {
 924         struct net_device         *dev;
 925         struct frad_local *flp;
 926
 927         dev = (struct net_device *) device;
 928         flp = netdev_priv(dev);
 929
 930         if (sdla_byte(dev, SDLA_502_RCV_BUF))
 931                 sdla_receive(dev);
 932
 933         flp->timer.expires = 1;
 934         add_timer(&flp->timer);
 935 }
 936
 937 static int sdla_close(struct net_device *dev)
 938 {
 939         struct frad_local *flp;
 940         struct intr_info  intr;
 941         int               len, i;
 942         short             dlcis[CONFIG_DLCI_MAX];
 943
 944         flp = netdev_priv(dev);
 945
 946         len = 0;
 947         for(i=0;i<CONFIG_DLCI_MAX;i++)
 948                 if (flp->dlci[i])
 949                         dlcis[len++] = abs(flp->dlci[i]);
 950         len *= 2;
 951
 952         if (flp->config.station == FRAD_STATION_NODE)
 953         {
 954                 for(i=0;i<CONFIG_DLCI_MAX;i++)
 955                         if (flp->dlci[i] > 0)
 956                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
 957                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
 958         }
 959
 960         memset(&intr, 0, sizeof(intr));
 961         /* let's start up the reception */
 962         switch(flp->type)
 963         {
 964                 case SDLA_S502A:
 965                         del_timer(&flp->timer);
 966                         break;
 967
 968                 case SDLA_S502E:
 969                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
 970                         flp->state &= ~SDLA_S502E_INTACK;
 971                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 972                         break;
 973
 974                 case SDLA_S507:
 975                         break;
 976
 977                 case SDLA_S508:
 978                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
 979                         flp->state &= ~SDLA_S508_INTEN;
 980                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
 981                         break;
 982         }
 983
 984         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
 985
 986         netif_stop_queue(dev);
 987
 988         return(0);
 989 }
 990
 991 struct conf_data {
 992         struct frad_conf config;
 993         short            dlci[CONFIG_DLCI_MAX];
 994 };
 995
 996 static int sdla_open(struct net_device *dev)
 997 {
 998         struct frad_local *flp;
 999         struct dlci_local *dlp;
1000         struct conf_data  data;
1001         struct intr_info  intr;
1002         int               len, i;
1003         char              byte;
1004
1005         flp = netdev_priv(dev);
1006
1007         if (!flp->initialized)
1008                 return(-EPERM);
1009
1010         if (!flp->configured)
1011                 return(-EPERM);
1012
1013         /* time to send in the configuration */
1014         len = 0;
1015         for(i=0;i<CONFIG_DLCI_MAX;i++)
1016                 if (flp->dlci[i])
1017                         data.dlci[len++] = abs(flp->dlci[i]);
1018         len *= 2;
1019
1020         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1021         len += sizeof(struct frad_conf);
1022
1023         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1024         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1025
1026         if (flp->type == SDLA_S508)
1027                 flp->buffer = 0;
1028
1029         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1030
1031         /* let's start up the reception */
1032         memset(&intr, 0, sizeof(intr));
1033         switch(flp->type)
1034         {
1035                 case SDLA_S502A:
1036                         flp->timer.expires = 1;
1037                         add_timer(&flp->timer);
1038                         break;
1039
1040                 case SDLA_S502E:
1041                         flp->state |= SDLA_S502E_ENABLE;
1042                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1043                         flp->state |= SDLA_S502E_INTACK;
1044                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1045                         byte = 0;
1046                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1047                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1048                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1049                         break;
1050
1051                 case SDLA_S507:
1052                         break;
1053
1054                 case SDLA_S508:
1055                         flp->state |= SDLA_S508_INTEN;
1056                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1057                         byte = 0;
1058                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1059                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1060                         intr.irq = dev->irq;
1061                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1062                         break;
1063         }
1064
1065         if (flp->config.station == FRAD_STATION_CPE)
1066         {
1067                 byte = SDLA_ICS_STATUS_ENQ;
1068                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1069         }
1070         else
1071         {
1072                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1073                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1074                         if (flp->dlci[i] > 0)
1075                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1076         }
1077
1078         /* configure any specific DLCI settings */
1079         for(i=0;i<CONFIG_DLCI_MAX;i++)
1080                 if (flp->dlci[i])
1081                 {
1082                         dlp = netdev_priv(flp->master[i]);
1083                         if (dlp->configured)
1084                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1085                 }
1086
1087         netif_start_queue(dev);
1088
1089         return(0);
1090 }
1091
1092 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1093 {
1094         struct frad_local *flp;
1095         struct conf_data  data;
1096         int               i;
1097         short             size;
1098
1099         if (dev->type == 0xFFFF)
1100                 return(-EUNATCH);
1101
1102         flp = netdev_priv(dev);
1103
1104         if (!get)
1105         {
1106                 if (netif_running(dev))
1107                         return(-EBUSY);
1108
1109                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1110                         return -EFAULT;
1111
1112                 if (data.config.station & ~FRAD_STATION_NODE)
1113                         return(-EINVAL);
1114
1115                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1116                         return(-EINVAL);
1117
1118                 if ((data.config.kbaud < 0) ||
1119                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1120                         return(-EINVAL);
1121
1122                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1123                         return(-EINVAL);
1124
1125                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1126                         return(-EINVAL);
1127
1128                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1129                         return(-EINVAL);
1130
1131                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1132                         return(-EINVAL);
1133
1134                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1135                         return(-EINVAL);
1136
1137                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1138                         return(-EINVAL);
1139
1140                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1141                         return(-EINVAL);
1142
1143                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1144                 flp->config.flags |= SDLA_DIRECT_RECV;
1145
1146                 if (flp->type == SDLA_S508)
1147                         flp->config.flags |= SDLA_TX70_RX30;
1148
1149                 if (dev->mtu != flp->config.mtu)
1150                 {
1151                         /* this is required to change the MTU */
1152                         dev->mtu = flp->config.mtu;
1153                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1154                                 if (flp->master[i])
1155                                         flp->master[i]->mtu = flp->config.mtu;
1156                 }
1157
1158                 flp->config.mtu += sizeof(struct frhdr);
1159
1160                 /* off to the races! */
1161                 if (!flp->configured)
1162                         sdla_start(dev);
1163
1164                 flp->configured = 1;
1165         }
1166         else
1167         {
1168                 /* no sense reading if the CPU isn't started */
1169                 if (netif_running(dev))
1170                 {
1171                         size = sizeof(data);
1172                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1173                                 return(-EIO);
1174                 }
1175                 else
1176                         if (flp->configured)
1177                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1178                         else
1179                                 memset(&data.config, 0, sizeof(struct frad_conf));
1180
1181                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1182                 data.config.flags &= FRAD_VALID_FLAGS;
1183                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1184                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1185         }
1186
1187         return(0);
1188 }
1189
1190 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1191 {
1192         struct sdla_mem mem;
1193         char    *temp;
1194
1195         if(copy_from_user(&mem, info, sizeof(mem)))
1196                 return -EFAULT;
1197
1198         if (read)
1199         {
1200                 temp = kzalloc(mem.len, GFP_KERNEL);
1201                 if (!temp)
1202                         return(-ENOMEM);
1203                 sdla_read(dev, mem.addr, temp, mem.len);
1204                 if(copy_to_user(mem.data, temp, mem.len))
1205                 {
1206                         kfree(temp);
1207                         return -EFAULT;
1208                 }
1209                 kfree(temp);
1210         }
1211         else
1212         {
1213                 temp = kmalloc(mem.len, GFP_KERNEL);
1214                 if (!temp)
1215                         return(-ENOMEM);
1216                 if(copy_from_user(temp, mem.data, mem.len))
1217                 {
1218                         kfree(temp);
1219                         return -EFAULT;
1220                 }
1221                 sdla_write(dev, mem.addr, temp, mem.len);
1222                 kfree(temp);
1223         }
1224         return(0);
1225 }
1226
1227 static int sdla_reconfig(struct net_device *dev)
1228 {
1229         struct frad_local *flp;
1230         struct conf_data  data;
1231         int               i, len;
1232
1233         flp = netdev_priv(dev);
1234
1235         len = 0;
1236         for(i=0;i<CONFIG_DLCI_MAX;i++)
1237                 if (flp->dlci[i])
1238                         data.dlci[len++] = flp->dlci[i];
1239         len *= 2;
1240
1241         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1242         len += sizeof(struct frad_conf);
1243
1244         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1245         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1246         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1247
1248         return(0);
1249 }
1250
1251 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1252 {
1253         struct frad_local *flp;
1254
1255         if(!capable(CAP_NET_ADMIN))
1256                 return -EPERM;
1257
1258         flp = netdev_priv(dev);
1259
1260         if (!flp->initialized)
1261                 return(-EINVAL);
1262
1263         switch (cmd)
1264         {
1265                 case FRAD_GET_CONF:
1266                 case FRAD_SET_CONF:
1267                         return(sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF));
1268
1269                 case SDLA_IDENTIFY:
1270                         ifr->ifr_flags = flp->type;
1271                         break;
1272
1273                 case SDLA_CPUSPEED:
1274                         return(sdla_cpuspeed(dev, ifr));
1275
1276 /* ==========================================================
1277 NOTE:  This is rather a useless action right now, as the
1278        current driver does not support protocols other than
1279        FR.  However, Sangoma has modules for a number of
1280        other protocols in the works.
1281 ============================================================*/
1282                 case SDLA_PROTOCOL:
1283                         if (flp->configured)
1284                                 return(-EALREADY);
1285
1286                         switch (ifr->ifr_flags)
1287                         {
1288                                 case ARPHRD_FRAD:
1289                                         dev->type = ifr->ifr_flags;
1290                                         break;
1291                                 default:
1292                                         return(-ENOPROTOOPT);
1293                         }
1294                         break;
1295
1296                 case SDLA_CLEARMEM:
1297                         sdla_clear(dev);
1298                         break;
1299
1300                 case SDLA_WRITEMEM:
1301                 case SDLA_READMEM:
1302                         if(!capable(CAP_SYS_RAWIO))
1303                                 return -EPERM;
1304                         return(sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM));
1305
1306                 case SDLA_START:
1307                         sdla_start(dev);
1308                         break;
1309
1310                 case SDLA_STOP:
1311                         sdla_stop(dev);
1312                         break;
1313
1314                 default:
1315                         return(-EOPNOTSUPP);
1316         }
1317         return(0);
1318 }
1319
1320 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1321 {
1322         struct frad_local *flp;
1323
1324         flp = netdev_priv(dev);
1325
1326         if (netif_running(dev))
1327                 return(-EBUSY);
1328
1329         /* for now, you can't change the MTU! */
1330         return(-EOPNOTSUPP);
1331 }
1332
1333 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1334 {
1335         struct frad_local *flp;
1336         int               i;
1337         char              byte;
1338         unsigned base;
1339         int err = -EINVAL;
1340
1341         flp = netdev_priv(dev);
1342
1343         if (flp->initialized)
1344                 return(-EINVAL);
1345
1346         for(i=0; i < ARRAY_SIZE(valid_port); i++)
1347                 if (valid_port[i] == map->base_addr)
1348                         break;
1349
1350         if (i == ARRAY_SIZE(valid_port))
1351                 return(-EINVAL);
1352
1353         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1354                 printk(KERN_WARNING "SDLA: io-port 0x%04lx in use \n", dev->base_addr);
1355                 return(-EINVAL);
1356         }
1357         base = map->base_addr;
1358
1359         /* test for card types, S502A, S502E, S507, S508                 */
1360         /* these tests shut down the card completely, so clear the state */
1361         flp->type = SDLA_UNKNOWN;
1362         flp->state = 0;
1363
1364         for(i=1;i<SDLA_IO_EXTENTS;i++)
1365                 if (inb(base + i) != 0xFF)
1366                         break;
1367
1368         if (i == SDLA_IO_EXTENTS) {
1369                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1370                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1371                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1372                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1373                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1374                                 flp->type = SDLA_S502E;
1375                                 goto got_type;
1376                         }
1377                 }
1378         }
1379
1380         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1381                 if (inb(base + i) != byte)
1382                         break;
1383
1384         if (i == SDLA_IO_EXTENTS) {
1385                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1386                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1387                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1388                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1389                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1390                                 flp->type = SDLA_S507;
1391                                 goto got_type;
1392                         }
1393                 }
1394         }
1395
1396         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1397         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1398                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1399                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1400                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1401                         flp->type = SDLA_S508;
1402                         goto got_type;
1403                 }
1404         }
1405
1406         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1407         if (inb(base + SDLA_S502_STS) == 0x40) {
1408                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1409                 if (inb(base + SDLA_S502_STS) == 0x40) {
1410                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1411                         if (inb(base + SDLA_S502_STS) == 0x44) {
1412                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1413                                 flp->type = SDLA_S502A;
1414                                 goto got_type;
1415                         }
1416                 }
1417         }
1418
1419         printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1420         err = -ENODEV;
1421         goto fail;
1422
1423 got_type:
1424         switch(base) {
1425                 case 0x270:
1426                 case 0x280:
1427                 case 0x380:
1428                 case 0x390:
1429                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1430                                 goto fail;
1431         }
1432
1433         switch (map->irq) {
1434                 case 2:
1435                         if (flp->type != SDLA_S502E)
1436                                 goto fail;
1437                         break;
1438
1439                 case 10:
1440                 case 11:
1441                 case 12:
1442                 case 15:
1443                 case 4:
1444                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1445                                 goto fail;
1446                         break;
1447                 case 3:
1448                 case 5:
1449                 case 7:
1450                         if (flp->type == SDLA_S502A)
1451                                 goto fail;
1452                         break;
1453
1454                 default:
1455                         goto fail;
1456         }
1457
1458         err = -EAGAIN;
1459         if (request_irq(dev->irq, &sdla_isr, 0, dev->name, dev))
1460                 goto fail;
1461
1462         if (flp->type == SDLA_S507) {
1463                 switch(dev->irq) {
1464                         case 3:
1465                                 flp->state = SDLA_S507_IRQ3;
1466                                 break;
1467                         case 4:
1468                                 flp->state = SDLA_S507_IRQ4;
1469                                 break;
1470                         case 5:
1471                                 flp->state = SDLA_S507_IRQ5;
1472                                 break;
1473                         case 7:
1474                                 flp->state = SDLA_S507_IRQ7;
1475                                 break;
1476                         case 10:
1477                                 flp->state = SDLA_S507_IRQ10;
1478                                 break;
1479                         case 11:
1480                                 flp->state = SDLA_S507_IRQ11;
1481                                 break;
1482                         case 12:
1483                                 flp->state = SDLA_S507_IRQ12;
1484                                 break;
1485                         case 15:
1486                                 flp->state = SDLA_S507_IRQ15;
1487                                 break;
1488                 }
1489         }
1490
1491         for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1492                 if (valid_mem[i] == map->mem_start)
1493                         break;
1494
1495         err = -EINVAL;
1496         if (i == ARRAY_SIZE(valid_mem))
1497                 goto fail2;
1498
1499         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1500                 goto fail2;
1501
1502         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1503                 goto fail2;
1504
1505         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1506                 goto fail2;
1507
1508         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1509         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1510         switch(flp->type) {
1511                 case SDLA_S502A:
1512                 case SDLA_S502E:
1513                         switch (map->mem_start >> 16) {
1514                                 case 0x0A:
1515                                         byte |= SDLA_S502_SEG_A;
1516                                         break;
1517                                 case 0x0C:
1518                                         byte |= SDLA_S502_SEG_C;
1519                                         break;
1520                                 case 0x0D:
1521                                         byte |= SDLA_S502_SEG_D;
1522                                         break;
1523                                 case 0x0E:
1524                                         byte |= SDLA_S502_SEG_E;
1525                                         break;
1526                         }
1527                         break;
1528                 case SDLA_S507:
1529                         switch (map->mem_start >> 16) {
1530                                 case 0x0A:
1531                                         byte |= SDLA_S507_SEG_A;
1532                                         break;
1533                                 case 0x0B:
1534                                         byte |= SDLA_S507_SEG_B;
1535                                         break;
1536                                 case 0x0C:
1537                                         byte |= SDLA_S507_SEG_C;
1538                                         break;
1539                                 case 0x0E:
1540                                         byte |= SDLA_S507_SEG_E;
1541                                         break;
1542                         }
1543                         break;
1544                 case SDLA_S508:
1545                         switch (map->mem_start >> 16) {
1546                                 case 0x0A:
1547                                         byte |= SDLA_S508_SEG_A;
1548                                         break;
1549                                 case 0x0C:
1550                                         byte |= SDLA_S508_SEG_C;
1551                                         break;
1552                                 case 0x0D:
1553                                         byte |= SDLA_S508_SEG_D;
1554                                         break;
1555                                 case 0x0E:
1556                                         byte |= SDLA_S508_SEG_E;
1557                                         break;
1558                         }
1559                         break;
1560         }
1561
1562         /* set the memory bits, and enable access */
1563         outb(byte, base + SDLA_REG_PC_WINDOW);
1564
1565         switch(flp->type)
1566         {
1567                 case SDLA_S502E:
1568                         flp->state = SDLA_S502E_ENABLE;
1569                         break;
1570                 case SDLA_S507:
1571                         flp->state |= SDLA_MEMEN;
1572                         break;
1573                 case SDLA_S508:
1574                         flp->state = SDLA_MEMEN;
1575                         break;
1576         }
1577         outb(flp->state, base + SDLA_REG_CONTROL);
1578
1579         dev->irq = map->irq;
1580         dev->base_addr = base;
1581         dev->mem_start = map->mem_start;
1582         dev->mem_end = dev->mem_start + 0x2000;
1583         flp->initialized = 1;
1584         return 0;
1585
1586 fail2:
1587         free_irq(map->irq, dev);
1588 fail:
1589         release_region(base, SDLA_IO_EXTENTS);
1590         return err;
1591 }
1592
1593 static struct net_device_stats *sdla_stats(struct net_device *dev)
1594 {
1595         struct frad_local *flp;
1596         flp = netdev_priv(dev);
1597
1598         return(&flp->stats);
1599 }
1600
1601 static void setup_sdla(struct net_device *dev)
1602 {
1603         struct frad_local *flp = netdev_priv(dev);
1604
1605         netdev_boot_setup_check(dev);
1606
1607         dev->flags              = 0;
1608         dev->type               = 0xFFFF;
1609         dev->hard_header_len    = 0;
1610         dev->addr_len           = 0;
1611         dev->mtu                = SDLA_MAX_MTU;
1612
1613         dev->open               = sdla_open;
1614         dev->stop               = sdla_close;
1615         dev->do_ioctl           = sdla_ioctl;
1616         dev->set_config         = sdla_set_config;
1617         dev->get_stats          = sdla_stats;
1618         dev->hard_start_xmit    = sdla_transmit;
1619         dev->change_mtu         = sdla_change_mtu;
1620
1621         flp->activate           = sdla_activate;
1622         flp->deactivate         = sdla_deactivate;
1623         flp->assoc              = sdla_assoc;
1624         flp->deassoc            = sdla_deassoc;
1625         flp->dlci_conf          = sdla_dlci_conf;
1626
1627         init_timer(&flp->timer);
1628         flp->timer.expires      = 1;
1629         flp->timer.data         = (unsigned long) dev;
1630         flp->timer.function     = sdla_poll;
1631 }
1632
1633 static struct net_device *sdla;
1634
1635 static int __init init_sdla(void)
1636 {
1637         int err;
1638
1639         printk("%s.\n", version);
1640
1641         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
1642         if (!sdla)
1643                 return -ENOMEM;
1644
1645         err = register_netdev(sdla);
1646         if (err)
1647                 free_netdev(sdla);
1648
1649         return err;
1650 }
1651
1652 static void __exit exit_sdla(void)
1653 {
1654         struct frad_local *flp = netdev_priv(sdla);
1655
1656         unregister_netdev(sdla);
1657         if (flp->initialized) {
1658                 free_irq(sdla->irq, sdla);
1659                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1660         }
1661         del_timer_sync(&flp->timer);
1662         free_netdev(sdla);
1663 }
1664
1665 MODULE_LICENSE("GPL");
1666
1667 module_init(init_sdla);
1668 module_exit(exit_sdla);