drivers/net/sb1000.c

   1 /* sb1000.c: A General Instruments SB1000 driver for linux. */
   2 /*
   3         Written 1998 by Franco Venturi.
   4
   5         Copyright 1998 by Franco Venturi.
   6         Copyright 1994,1995 by Donald Becker.
   7         Copyright 1993 United States Government as represented by the
   8         Director, National Security Agency.
   9
  10         This driver is for the General Instruments SB1000 (internal SURFboard)
  11
  12         The author may be reached as fventuri@mediaone.net
  13
  14         This program is free software; you can redistribute it
  15         and/or  modify it under  the terms of  the GNU General
  16         Public  License as  published  by  the  Free  Software
  17         Foundation;  either  version 2 of the License, or  (at
  18         your option) any later version.
  19
  20         Changes:
  21
  22         981115 Steven Hirsch <shirsch@adelphia.net>
  23
  24         Linus changed the timer interface.  Should work on all recent
  25         development kernels.
  26
  27         980608 Steven Hirsch <shirsch@adelphia.net>
  28
  29         Small changes to make it work with 2.1.x kernels. Hopefully,
  30         nothing major will change before official release of Linux 2.2.
  31
  32         Merged with 2.2 - Alan Cox
  33 */
  34
  35 static char version[] = "sb1000.c:v1.1.2 6/01/98 (fventuri@mediaone.net)\n";
  36
  37 #include <linux/module.h>
  38
  39 #include <linux/version.h>
  40 #include <linux/kernel.h>
  41 #include <linux/sched.h>
  42 #include <linux/string.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/errno.h>
  46 #include <linux/in.h>
  47 #include <linux/slab.h>
  48 #include <linux/ioport.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/if_arp.h>
  51 #include <linux/skbuff.h>
  52 #include <linux/delay.h>        /* for udelay() */
  53 #include <asm/processor.h>
  54
  55 #include <asm/bitops.h>
  56 #include <asm/io.h>
  57 #include <asm/uaccess.h>
  58 #include <linux/etherdevice.h>
  59 #include <linux/isapnp.h>
  60
  61 /* for SIOGCM/SIOSCM stuff */
  62
  63 #include <linux/if_cablemodem.h>
  64
  65 #ifdef SB1000_DEBUG
  66 int sb1000_debug = SB1000_DEBUG;
  67 #else
  68 int sb1000_debug = 1;
  69 #endif
  70
  71 static const int SB1000_IO_EXTENT = 8;
  72 /* SB1000 Maximum Receive Unit */
  73 static const int SB1000_MRU = 1500; /* octects */
  74
  75 #define NPIDS 4
  76 struct sb1000_private {
  77         struct sk_buff *rx_skb[NPIDS];
  78         short rx_dlen[NPIDS];
  79         unsigned int rx_frames;
  80         short rx_error_count;
  81         short rx_error_dpc_count;
  82         unsigned char rx_session_id[NPIDS];
  83         unsigned char rx_frame_id[NPIDS];
  84         unsigned char rx_pkt_type[NPIDS];
  85         struct net_device_stats stats;
  86 };
  87
  88 /* prototypes for Linux interface */
  89 extern int sb1000_probe(struct net_device *dev);
  90 static int sb1000_open(struct net_device *dev);
  91 static int sb1000_dev_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
  92 static int sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev);
  93 static void sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  94 static struct net_device_stats *sb1000_stats(struct net_device *dev);
  95 static int sb1000_close(struct net_device *dev);
  96
  97
  98 /* SB1000 hardware routines to be used during open/configuration phases */
  99 static inline void nicedelay(unsigned long usecs);
 100 static inline int card_wait_for_busy_clear(const int ioaddr[],
 101         const char* name);
 102 static inline int card_wait_for_ready(const int ioaddr[], const char* name,
 103         unsigned char in[]);
 104 static inline int card_send_command(const int ioaddr[], const char* name,
 105         const unsigned char out[], unsigned char in[]);
 106
 107 /* SB1000 hardware routines to be used during frame rx interrupt */
 108 static inline int sb1000_wait_for_ready(const int ioaddr[], const char* name);
 109 static inline int sb1000_wait_for_ready_clear(const int ioaddr[],
 110         const char* name);
 111 static inline void sb1000_send_command(const int ioaddr[], const char* name,
 112         const unsigned char out[]);
 113 static inline void sb1000_read_status(const int ioaddr[], unsigned char in[]);
 114 static inline void sb1000_issue_read_command(const int ioaddr[],
 115         const char* name);
 116
 117 /* SB1000 commands for open/configuration */
 118 static inline int sb1000_reset(const int ioaddr[], const char* name);
 119 static inline int sb1000_check_CRC(const int ioaddr[], const char* name);
 120 static inline int sb1000_start_get_set_command(const int ioaddr[],
 121         const char* name);
 122 static inline int sb1000_end_get_set_command(const int ioaddr[],
 123         const char* name);
 124 static inline int sb1000_activate(const int ioaddr[], const char* name);
 125 static inline int sb1000_get_firmware_version(const int ioaddr[],
 126         const char* name, unsigned char version[], int do_end);
 127 static inline int sb1000_get_frequency(const int ioaddr[], const char* name,
 128         int* frequency);
 129 static inline int sb1000_set_frequency(const int ioaddr[], const char* name,
 130         int frequency);
 131 static inline int sb1000_get_PIDs(const int ioaddr[], const char* name,
 132         short PID[]);
 133 static inline int sb1000_set_PIDs(const int ioaddr[], const char* name,
 134         const short PID[]);
 135
 136 /* SB1000 commands for frame rx interrupt */
 137 static inline int sb1000_rx(struct net_device *dev);
 138 static inline void sb1000_error_dpc(struct net_device *dev);
 139
 140 static struct isapnp_device_id id_table[] = {
 141         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 142                 ISAPNP_VENDOR('G','I','C'), ISAPNP_FUNCTION(0x1000), 0 },
 143         {0}
 144 };
 145
 146 MODULE_DEVICE_TABLE(isapnp, id_table);
 147
 148 /* probe for SB1000 using Plug-n-Play mechanism */
 149 int
 150 sb1000_probe(struct net_device *dev)
 151 {
 152
 153         unsigned short ioaddr[2], irq;
 154         struct pci_dev *idev=NULL;
 155         unsigned int serial_number;
 156
 157         while(1)
 158         {
 159                 /*
 160                  *      Find the card
 161                  */
 162
 163                 idev=isapnp_find_dev(NULL, ISAPNP_VENDOR('G','I','C'),
 164                         ISAPNP_FUNCTION(0x1000), idev);
 165
 166                 /*
 167                  *      No card
 168                  */
 169
 170                 if(idev==NULL)
 171                         return -ENODEV;
 172
 173                 /*
 174                  *      Bring it online
 175                  */
 176
 177                 idev->prepare(idev);
 178                 idev->activate(idev);
 179
 180                 /*
 181                  *      Ports free ?
 182                  */
 183
 184                 if(!idev->resource[0].start || check_region(idev->resource[0].start, 16))
 185                         continue;
 186                 if(!idev->resource[1].start || check_region(idev->resource[1].start, 16))
 187                         continue;
 188
 189                 serial_number = idev->bus->serial;
 190
 191                 ioaddr[0]=idev->resource[0].start;
 192                 ioaddr[1]=idev->resource[1].start;
 193
 194                 irq = idev->irq_resource[0].start;
 195
 196                 /* check I/O base and IRQ */
 197                 if (dev->base_addr != 0 && dev->base_addr != ioaddr[0])
 198                         continue;
 199                 if (dev->rmem_end != 0 && dev->rmem_end != ioaddr[1])
 200                         continue;
 201                 if (dev->irq != 0 && dev->irq != irq)
 202                         continue;
 203
 204                 /*
 205                  *      Ok set it up.
 206                  */
 207                 if (!request_region(ioaddr[0], 16, dev->name))
 208                         continue;
 209                 if (!request_region(ioaddr[1], 16, dev->name)) {
 210                         release_region(ioaddr[0], 16);
 211                         continue;
 212                 }
 213
 214                 dev->base_addr = ioaddr[0];
 215                 /* rmem_end holds the second I/O address - fv */
 216                 dev->rmem_end = ioaddr[1];
 217                 dev->irq = irq;
 218
 219                 if (sb1000_debug > 0)
 220                         printk(KERN_NOTICE "%s: sb1000 at (%#3.3lx,%#3.3lx), "
 221                                 "S/N %#8.8x, IRQ %d.\n", dev->name, dev->base_addr,
 222                                 dev->rmem_end, serial_number, dev->irq);
 223
 224                 dev = init_etherdev(dev, 0);
 225                 if (!dev)
 226                         return -ENOMEM;
 227                 SET_MODULE_OWNER(dev);
 228
 229                 /* Make up a SB1000-specific-data structure. */
 230                 dev->priv = kmalloc(sizeof(struct sb1000_private), GFP_KERNEL);
 231                 if (dev->priv == NULL)
 232                         return -ENOMEM;
 233                 memset(dev->priv, 0, sizeof(struct sb1000_private));
 234
 235                 if (sb1000_debug > 0)
 236                         printk(KERN_NOTICE "%s", version);
 237
 238                 /* The SB1000-specific entries in the device structure. */
 239                 dev->open = sb1000_open;
 240                 dev->do_ioctl = sb1000_dev_ioctl;
 241                 dev->hard_start_xmit = sb1000_start_xmit;
 242                 dev->stop = sb1000_close;
 243                 dev->get_stats = sb1000_stats;
 244
 245                 /* Fill in the generic fields of the device structure. */
 246                 dev->change_mtu         = NULL;
 247                 dev->hard_header        = NULL;
 248                 dev->rebuild_header     = NULL;
 249                 dev->set_mac_address    = NULL;
 250                 dev->header_cache_update= NULL;
 251
 252                 dev->type               = ARPHRD_ETHER;
 253                 dev->hard_header_len    = 0;
 254                 dev->mtu                = 1500;
 255                 dev->addr_len           = ETH_ALEN;
 256                 /* hardware address is 0:0:serial_number */
 257                 dev->dev_addr[0] = 0;
 258                 dev->dev_addr[1] = 0;
 259                 dev->dev_addr[2] = serial_number >> 24 & 0xff;
 260                 dev->dev_addr[3] = serial_number >> 16 & 0xff;
 261                 dev->dev_addr[4] = serial_number >>  8 & 0xff;
 262                 dev->dev_addr[5] = serial_number >>  0 & 0xff;
 263                 dev->tx_queue_len       = 0;
 264
 265                 /* New-style flags. */
 266                 dev->flags              = IFF_POINTOPOINT|IFF_NOARP;
 267
 268                 /* Lock resources */
 269
 270                 return 0;
 271         }
 272 }
 273
 274 \f
 275 /*
 276  * SB1000 hardware routines to be used during open/configuration phases
 277  */
 278
 279 const int TimeOutJiffies = (875 * HZ) / 100;
 280
 281 static inline void nicedelay(unsigned long usecs)
 282 {
 283         current->state = TASK_INTERRUPTIBLE;
 284         schedule_timeout(HZ);
 285         return;
 286 }
 287
 288 /* Card Wait For Busy Clear (cannot be used during an interrupt) */
 289 static inline int
 290 card_wait_for_busy_clear(const int ioaddr[], const char* name)
 291 {
 292         unsigned char a;
 293         unsigned long timeout;
 294
 295         a = inb(ioaddr[0] + 7);
 296         timeout = jiffies + TimeOutJiffies;
 297         while (a & 0x80 || a & 0x40) {
 298                 /* a little sleep */
 299                 current->state = TASK_INTERRUPTIBLE;
 300                 schedule_timeout(0);
 301                 a = inb(ioaddr[0] + 7);
 302                 if (time_after_eq(jiffies, timeout)) {
 303                         printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
 304                                 name);
 305                         return -ETIME;
 306                 }
 307         }
 308
 309         return 0;
 310 }
 311
 312 /* Card Wait For Ready (cannot be used during an interrupt) */
 313 static inline int
 314 card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
 315 {
 316         unsigned char a;
 317         unsigned long timeout;
 318
 319         a = inb(ioaddr[1] + 6);
 320         timeout = jiffies + TimeOutJiffies;
 321         while (a & 0x80 || !(a & 0x40)) {
 322                 /* a little sleep */
 323                 current->state = TASK_INTERRUPTIBLE;
 324                 schedule_timeout(0);
 325                 a = inb(ioaddr[1] + 6);
 326                 if (time_after_eq(jiffies, timeout)) {
 327                         printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",
 328                                 name);
 329                         return -ETIME;
 330                 }
 331         }
 332
 333         in[1] = inb(ioaddr[0] + 1);
 334         in[2] = inb(ioaddr[0] + 2);
 335         in[3] = inb(ioaddr[0] + 3);
 336         in[4] = inb(ioaddr[0] + 4);
 337         in[0] = inb(ioaddr[0] + 5);
 338         in[6] = inb(ioaddr[0] + 6);
 339         in[5] = inb(ioaddr[1] + 6);
 340         return 0;
 341 }
 342
 343 /* Card Send Command (cannot be used during an interrupt) */
 344 static inline int
 345 card_send_command(const int ioaddr[], const char* name,
 346         const unsigned char out[], unsigned char in[])
 347 {
 348         int status, x;
 349
 350         if ((status = card_wait_for_busy_clear(ioaddr, name)))
 351                 return status;
 352         outb(0xa0, ioaddr[0] + 6);
 353         outb(out[2], ioaddr[0] + 1);
 354         outb(out[3], ioaddr[0] + 2);
 355         outb(out[4], ioaddr[0] + 3);
 356         outb(out[5], ioaddr[0] + 4);
 357         outb(out[1], ioaddr[0] + 5);
 358         outb(0xa0, ioaddr[0] + 6);
 359         outb(out[0], ioaddr[0] + 7);
 360         if (out[0] != 0x20 && out[0] != 0x30) {
 361                 if ((status = card_wait_for_ready(ioaddr, name, in)))
 362                         return status;
 363                 inb(ioaddr[0] + 7);
 364                 if (sb1000_debug > 3)
 365                         printk(KERN_DEBUG "%s: card_send_command "
 366                                 "out: %02x%02x%02x%02x%02x%02x  "
 367                                 "in: %02x%02x%02x%02x%02x%02x%02x\n", name,
 368                                 out[0], out[1], out[2], out[3], out[4], out[5],
 369                                 in[0], in[1], in[2], in[3], in[4], in[5], in[6]);
 370         } else {
 371                 if (sb1000_debug > 3)
 372                         printk(KERN_DEBUG "%s: card_send_command "
 373                                 "out: %02x%02x%02x%02x%02x%02x\n", name,
 374                                 out[0], out[1], out[2], out[3], out[4], out[5]);
 375         }
 376
 377         if (out[1] == 0x1b) {
 378                 x = (out[2] == 0x02);
 379         } else {
 380                 if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
 381                         return -EIO;
 382         }
 383         return 0;
 384 }
 385
 386 \f
 387 /*
 388  * SB1000 hardware routines to be used during frame rx interrupt
 389  */
 390 const int Sb1000TimeOutJiffies = 7 * HZ;
 391
 392 /* Card Wait For Ready (to be used during frame rx) */
 393 static inline int
 394 sb1000_wait_for_ready(const int ioaddr[], const char* name)
 395 {
 396         unsigned long timeout;
 397
 398         timeout = jiffies + Sb1000TimeOutJiffies;
 399         while (inb(ioaddr[1] + 6) & 0x80) {
 400                 if (time_after_eq(jiffies, timeout)) {
 401                         printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
 402                                 name);
 403                         return -ETIME;
 404                 }
 405         }
 406         timeout = jiffies + Sb1000TimeOutJiffies;
 407         while (!(inb(ioaddr[1] + 6) & 0x40)) {
 408                 if (time_after_eq(jiffies, timeout)) {
 409                         printk(KERN_WARNING "%s: sb1000_wait_for_ready timeout\n",
 410                                 name);
 411                         return -ETIME;
 412                 }
 413         }
 414         inb(ioaddr[0] + 7);
 415         return 0;
 416 }
 417
 418 /* Card Wait For Ready Clear (to be used during frame rx) */
 419 static inline int
 420 sb1000_wait_for_ready_clear(const int ioaddr[], const char* name)
 421 {
 422         unsigned long timeout;
 423
 424         timeout = jiffies + Sb1000TimeOutJiffies;
 425         while (inb(ioaddr[1] + 6) & 0x80) {
 426                 if (time_after_eq(jiffies, timeout)) {
 427                         printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
 428                                 name);
 429                         return -ETIME;
 430                 }
 431         }
 432         timeout = jiffies + Sb1000TimeOutJiffies;
 433         while (inb(ioaddr[1] + 6) & 0x40) {
 434                 if (time_after_eq(jiffies, timeout)) {
 435                         printk(KERN_WARNING "%s: sb1000_wait_for_ready_clear timeout\n",
 436                                 name);
 437                         return -ETIME;
 438                 }
 439         }
 440         return 0;
 441 }
 442
 443 /* Card Send Command (to be used during frame rx) */
 444 static inline void
 445 sb1000_send_command(const int ioaddr[], const char* name,
 446         const unsigned char out[])
 447 {
 448         outb(out[2], ioaddr[0] + 1);
 449         outb(out[3], ioaddr[0] + 2);
 450         outb(out[4], ioaddr[0] + 3);
 451         outb(out[5], ioaddr[0] + 4);
 452         outb(out[1], ioaddr[0] + 5);
 453         outb(out[0], ioaddr[0] + 7);
 454         if (sb1000_debug > 3)
 455                 printk(KERN_DEBUG "%s: sb1000_send_command out: %02x%02x%02x%02x"
 456                         "%02x%02x\n", name, out[0], out[1], out[2], out[3], out[4], out[5]);
 457         return;
 458 }
 459
 460 /* Card Read Status (to be used during frame rx) */
 461 static inline void
 462 sb1000_read_status(const int ioaddr[], unsigned char in[])
 463 {
 464         in[1] = inb(ioaddr[0] + 1);
 465         in[2] = inb(ioaddr[0] + 2);
 466         in[3] = inb(ioaddr[0] + 3);
 467         in[4] = inb(ioaddr[0] + 4);
 468         in[0] = inb(ioaddr[0] + 5);
 469         return;
 470 }
 471
 472 /* Issue Read Command (to be used during frame rx) */
 473 static inline void
 474 sb1000_issue_read_command(const int ioaddr[], const char* name)
 475 {
 476         const unsigned char Command0[6] = {0x20, 0x00, 0x00, 0x01, 0x00, 0x00};
 477
 478         sb1000_wait_for_ready_clear(ioaddr, name);
 479         outb(0xa0, ioaddr[0] + 6);
 480         sb1000_send_command(ioaddr, name, Command0);
 481         return;
 482 }
 483
 484 \f
 485 /*
 486  * SB1000 commands for open/configuration
 487  */
 488 /* reset SB1000 card */
 489 static inline int
 490 sb1000_reset(const int ioaddr[], const char* name)
 491 {
 492         unsigned char st[7];
 493         int port, status;
 494         const unsigned char Command0[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
 495
 496         port = ioaddr[1] + 6;
 497         outb(0x4, port);
 498         inb(port);
 499         udelay(1000);
 500         outb(0x0, port);
 501         inb(port);
 502         nicedelay(60000);
 503         outb(0x4, port);
 504         inb(port);
 505         udelay(1000);
 506         outb(0x0, port);
 507         inb(port);
 508         udelay(0);
 509
 510         if ((status = card_send_command(ioaddr, name, Command0, st)))
 511                 return status;
 512         if (st[3] != 0xf0)
 513                 return -EIO;
 514         return 0;
 515 }
 516
 517 /* check SB1000 firmware CRC */
 518 static inline int
 519 sb1000_check_CRC(const int ioaddr[], const char* name)
 520 {
 521         unsigned char st[7];
 522         int crc, status;
 523         const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
 524
 525         /* check CRC */
 526         if ((status = card_send_command(ioaddr, name, Command0, st)))
 527                 return status;
 528         if (st[1] != st[3] || st[2] != st[4])
 529                 return -EIO;
 530         crc = st[1] << 8 | st[2];
 531         return 0;
 532 }
 533
 534 static inline int
 535 sb1000_start_get_set_command(const int ioaddr[], const char* name)
 536 {
 537         unsigned char st[7];
 538         const unsigned char Command0[6] = {0x80, 0x1b, 0x00, 0x00, 0x00, 0x00};
 539
 540         return card_send_command(ioaddr, name, Command0, st);
 541 }
 542
 543 static inline int
 544 sb1000_end_get_set_command(const int ioaddr[], const char* name)
 545 {
 546         unsigned char st[7];
 547         int status;
 548         const unsigned char Command0[6] = {0x80, 0x1b, 0x02, 0x00, 0x00, 0x00};
 549         const unsigned char Command1[6] = {0x20, 0x00, 0x00, 0x00, 0x00, 0x00};
 550
 551         if ((status = card_send_command(ioaddr, name, Command0, st)))
 552                 return status;
 553         return card_send_command(ioaddr, name, Command1, st);
 554 }
 555
 556 static inline int
 557 sb1000_activate(const int ioaddr[], const char* name)
 558 {
 559         unsigned char st[7];
 560         int status;
 561         const unsigned char Command0[6] = {0x80, 0x11, 0x00, 0x00, 0x00, 0x00};
 562         const unsigned char Command1[6] = {0x80, 0x16, 0x00, 0x00, 0x00, 0x00};
 563
 564         nicedelay(50000);
 565         if ((status = card_send_command(ioaddr, name, Command0, st)))
 566                 return status;
 567         if ((status = card_send_command(ioaddr, name, Command1, st)))
 568                 return status;
 569         if (st[3] != 0xf1) {
 570         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 571                         return status;
 572                 return -EIO;
 573         }
 574         udelay(1000);
 575     return sb1000_start_get_set_command(ioaddr, name);
 576 }
 577
 578 /* get SB1000 firmware version */
 579 static inline int
 580 sb1000_get_firmware_version(const int ioaddr[], const char* name,
 581         unsigned char version[], int do_end)
 582 {
 583         unsigned char st[7];
 584         int status;
 585         const unsigned char Command0[6] = {0x80, 0x23, 0x00, 0x00, 0x00, 0x00};
 586
 587         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 588                 return status;
 589         if ((status = card_send_command(ioaddr, name, Command0, st)))
 590                 return status;
 591         if (st[0] != 0xa3)
 592                 return -EIO;
 593         version[0] = st[1];
 594         version[1] = st[2];
 595         if (do_end)
 596                 return sb1000_end_get_set_command(ioaddr, name);
 597         else
 598                 return 0;
 599 }
 600
 601 /* get SB1000 frequency */
 602 static inline int
 603 sb1000_get_frequency(const int ioaddr[], const char* name, int* frequency)
 604 {
 605         unsigned char st[7];
 606         int status;
 607         const unsigned char Command0[6] = {0x80, 0x44, 0x00, 0x00, 0x00, 0x00};
 608
 609         udelay(1000);
 610         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 611                 return status;
 612         if ((status = card_send_command(ioaddr, name, Command0, st)))
 613                 return status;
 614         *frequency = ((st[1] << 8 | st[2]) << 8 | st[3]) << 8 | st[4];
 615         return sb1000_end_get_set_command(ioaddr, name);
 616 }
 617
 618 /* set SB1000 frequency */
 619 static inline int
 620 sb1000_set_frequency(const int ioaddr[], const char* name, int frequency)
 621 {
 622         unsigned char st[7];
 623         int status;
 624         unsigned char Command0[6] = {0x80, 0x29, 0x00, 0x00, 0x00, 0x00};
 625
 626         const int FrequencyLowerLimit = 57000;
 627         const int FrequencyUpperLimit = 804000;
 628
 629         if (frequency < FrequencyLowerLimit || frequency > FrequencyUpperLimit) {
 630                 printk(KERN_ERR "%s: frequency chosen (%d kHz) is not in the range "
 631                         "[%d,%d] kHz\n", name, frequency, FrequencyLowerLimit,
 632                         FrequencyUpperLimit);
 633                 return -EINVAL;
 634         }
 635         udelay(1000);
 636         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 637                 return status;
 638         Command0[5] = frequency & 0xff;
 639         frequency >>= 8;
 640         Command0[4] = frequency & 0xff;
 641         frequency >>= 8;
 642         Command0[3] = frequency & 0xff;
 643         frequency >>= 8;
 644         Command0[2] = frequency & 0xff;
 645         return card_send_command(ioaddr, name, Command0, st);
 646 }
 647
 648 /* get SB1000 PIDs */
 649 static inline int
 650 sb1000_get_PIDs(const int ioaddr[], const char* name, short PID[])
 651 {
 652         unsigned char st[7];
 653         int status;
 654         const unsigned char Command0[6] = {0x80, 0x40, 0x00, 0x00, 0x00, 0x00};
 655         const unsigned char Command1[6] = {0x80, 0x41, 0x00, 0x00, 0x00, 0x00};
 656         const unsigned char Command2[6] = {0x80, 0x42, 0x00, 0x00, 0x00, 0x00};
 657         const unsigned char Command3[6] = {0x80, 0x43, 0x00, 0x00, 0x00, 0x00};
 658
 659         udelay(1000);
 660         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 661                 return status;
 662
 663         if ((status = card_send_command(ioaddr, name, Command0, st)))
 664                 return status;
 665         PID[0] = st[1] << 8 | st[2];
 666
 667         if ((status = card_send_command(ioaddr, name, Command1, st)))
 668                 return status;
 669         PID[1] = st[1] << 8 | st[2];
 670
 671         if ((status = card_send_command(ioaddr, name, Command2, st)))
 672                 return status;
 673         PID[2] = st[1] << 8 | st[2];
 674
 675         if ((status = card_send_command(ioaddr, name, Command3, st)))
 676                 return status;
 677         PID[3] = st[1] << 8 | st[2];
 678
 679         return sb1000_end_get_set_command(ioaddr, name);
 680 }
 681
 682 /* set SB1000 PIDs */
 683 static inline int
 684 sb1000_set_PIDs(const int ioaddr[], const char* name, const short PID[])
 685 {
 686         unsigned char st[7];
 687         short p;
 688         int status;
 689         unsigned char Command0[6] = {0x80, 0x31, 0x00, 0x00, 0x00, 0x00};
 690         unsigned char Command1[6] = {0x80, 0x32, 0x00, 0x00, 0x00, 0x00};
 691         unsigned char Command2[6] = {0x80, 0x33, 0x00, 0x00, 0x00, 0x00};
 692         unsigned char Command3[6] = {0x80, 0x34, 0x00, 0x00, 0x00, 0x00};
 693         const unsigned char Command4[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
 694
 695         udelay(1000);
 696         if ((status = sb1000_start_get_set_command(ioaddr, name)))
 697                 return status;
 698
 699         p = PID[0];
 700         Command0[3] = p & 0xff;
 701         p >>= 8;
 702         Command0[2] = p & 0xff;
 703         if ((status = card_send_command(ioaddr, name, Command0, st)))
 704                 return status;
 705
 706         p = PID[1];
 707         Command1[3] = p & 0xff;
 708         p >>= 8;
 709         Command1[2] = p & 0xff;
 710         if ((status = card_send_command(ioaddr, name, Command1, st)))
 711                 return status;
 712
 713         p = PID[2];
 714         Command2[3] = p & 0xff;
 715         p >>= 8;
 716         Command2[2] = p & 0xff;
 717         if ((status = card_send_command(ioaddr, name, Command2, st)))
 718                 return status;
 719
 720         p = PID[3];
 721         Command3[3] = p & 0xff;
 722         p >>= 8;
 723         Command3[2] = p & 0xff;
 724         if ((status = card_send_command(ioaddr, name, Command3, st)))
 725                 return status;
 726
 727         if ((status = card_send_command(ioaddr, name, Command4, st)))
 728                 return status;
 729         return sb1000_end_get_set_command(ioaddr, name);
 730 }
 731
 732 \f
 733 static inline void
 734 sb1000_print_status_buffer(const char* name, unsigned char st[],
 735         unsigned char buffer[], int size)
 736 {
 737         int i, j, k;
 738
 739         printk(KERN_DEBUG "%s: status: %02x %02x\n", name, st[0], st[1]);
 740         if (buffer[24] == 0x08 && buffer[25] == 0x00 && buffer[26] == 0x45) {
 741                 printk(KERN_DEBUG "%s: length: %d protocol: %d from: %d.%d.%d.%d:%d "
 742                         "to %d.%d.%d.%d:%d\n", name, buffer[28] << 8 | buffer[29],
 743                         buffer[35], buffer[38], buffer[39], buffer[40], buffer[41],
 744             buffer[46] << 8 | buffer[47],
 745                         buffer[42], buffer[43], buffer[44], buffer[45],
 746             buffer[48] << 8 | buffer[49]);
 747         } else {
 748                 for (i = 0, k = 0; i < (size + 7) / 8; i++) {
 749                         printk(KERN_DEBUG "%s: %s", name, i ? "       " : "buffer:");
 750                         for (j = 0; j < 8 && k < size; j++, k++)
 751                                 printk(" %02x", buffer[k]);
 752                         printk("\n");
 753                 }
 754         }
 755         return;
 756 }
 757
 758 /*
 759  * SB1000 commands for frame rx interrupt
 760  */
 761 /* receive a single frame and assemble datagram
 762  * (this is the heart of the interrupt routine)
 763  */
 764 static inline int
 765 sb1000_rx(struct net_device *dev)
 766 {
 767
 768 #define FRAMESIZE 184
 769         unsigned char st[2], buffer[FRAMESIZE], session_id, frame_id;
 770         short dlen;
 771         int ioaddr, ns;
 772         unsigned int skbsize;
 773         struct sk_buff *skb;
 774         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
 775         struct net_device_stats *stats = &lp->stats;
 776
 777         /* SB1000 frame constants */
 778         const int FrameSize = FRAMESIZE;
 779         const int NewDatagramHeaderSkip = 8;
 780         const int NewDatagramHeaderSize = NewDatagramHeaderSkip + 18;
 781         const int NewDatagramDataSize = FrameSize - NewDatagramHeaderSize;
 782         const int ContDatagramHeaderSkip = 7;
 783         const int ContDatagramHeaderSize = ContDatagramHeaderSkip + 1;
 784         const int ContDatagramDataSize = FrameSize - ContDatagramHeaderSize;
 785         const int TrailerSize = 4;
 786
 787         ioaddr = dev->base_addr;
 788
 789         insw(ioaddr, (unsigned short*) st, 1);
 790 #ifdef XXXDEBUG
 791 printk("cm0: received: %02x %02x\n", st[0], st[1]);
 792 #endif /* XXXDEBUG */
 793         lp->rx_frames++;
 794
 795         /* decide if it is a good or bad frame */
 796         for (ns = 0; ns < NPIDS; ns++) {
 797                 session_id = lp->rx_session_id[ns];
 798                 frame_id = lp->rx_frame_id[ns];
 799                 if (st[0] == session_id) {
 800                         if (st[1] == frame_id || (!frame_id && (st[1] & 0xf0) == 0x30)) {
 801                                 goto good_frame;
 802                         } else if ((st[1] & 0xf0) == 0x30 && (st[0] & 0x40)) {
 803                                 goto skipped_frame;
 804                         } else {
 805                                 goto bad_frame;
 806                         }
 807                 } else if (st[0] == (session_id | 0x40)) {
 808                         if ((st[1] & 0xf0) == 0x30) {
 809                                 goto skipped_frame;
 810                         } else {
 811                                 goto bad_frame;
 812                         }
 813                 }
 814         }
 815         goto bad_frame;
 816
 817 skipped_frame:
 818         stats->rx_frame_errors++;
 819         skb = lp->rx_skb[ns];
 820         if (sb1000_debug > 1)
 821                 printk(KERN_WARNING "%s: missing frame(s): got %02x %02x "
 822                         "expecting %02x %02x\n", dev->name, st[0], st[1],
 823                         skb ? session_id : session_id | 0x40, frame_id);
 824         if (skb) {
 825                 dev_kfree_skb(skb);
 826                 skb = 0;
 827         }
 828
 829 good_frame:
 830         lp->rx_frame_id[ns] = 0x30 | ((st[1] + 1) & 0x0f);
 831         /* new datagram */
 832         if (st[0] & 0x40) {
 833                 /* get data length */
 834                 insw(ioaddr, buffer, NewDatagramHeaderSize / 2);
 835 #ifdef XXXDEBUG
 836 printk("cm0: IP identification: %02x%02x  fragment offset: %02x%02x\n", buffer[30], buffer[31], buffer[32], buffer[33]);
 837 #endif /* XXXDEBUG */
 838                 if (buffer[0] != NewDatagramHeaderSkip) {
 839                         if (sb1000_debug > 1)
 840                                 printk(KERN_WARNING "%s: new datagram header skip error: "
 841                                         "got %02x expecting %02x\n", dev->name, buffer[0],
 842                                         NewDatagramHeaderSkip);
 843                         stats->rx_length_errors++;
 844                         insw(ioaddr, buffer, NewDatagramDataSize / 2);
 845                         goto bad_frame_next;
 846                 }
 847                 dlen = ((buffer[NewDatagramHeaderSkip + 3] & 0x0f) << 8 |
 848                         buffer[NewDatagramHeaderSkip + 4]) - 17;
 849                 if (dlen > SB1000_MRU) {
 850                         if (sb1000_debug > 1)
 851                                 printk(KERN_WARNING "%s: datagram length (%d) greater "
 852                                         "than MRU (%d)\n", dev->name, dlen, SB1000_MRU);
 853                         stats->rx_length_errors++;
 854                         insw(ioaddr, buffer, NewDatagramDataSize / 2);
 855                         goto bad_frame_next;
 856                 }
 857                 lp->rx_dlen[ns] = dlen;
 858                 /* compute size to allocate for datagram */
 859                 skbsize = dlen + FrameSize;
 860                 if ((skb = alloc_skb(skbsize, GFP_ATOMIC)) == NULL) {
 861                         if (sb1000_debug > 1)
 862                                 printk(KERN_WARNING "%s: can't allocate %d bytes long "
 863                                         "skbuff\n", dev->name, skbsize);
 864                         stats->rx_dropped++;
 865                         insw(ioaddr, buffer, NewDatagramDataSize / 2);
 866                         goto dropped_frame;
 867                 }
 868                 skb->dev = dev;
 869                 skb->mac.raw = skb->data;
 870                 skb->protocol = (unsigned short) buffer[NewDatagramHeaderSkip + 16];
 871                 insw(ioaddr, skb_put(skb, NewDatagramDataSize),
 872                         NewDatagramDataSize / 2);
 873                 lp->rx_skb[ns] = skb;
 874         } else {
 875                 /* continuation of previous datagram */
 876                 insw(ioaddr, buffer, ContDatagramHeaderSize / 2);
 877                 if (buffer[0] != ContDatagramHeaderSkip) {
 878                         if (sb1000_debug > 1)
 879                                 printk(KERN_WARNING "%s: cont datagram header skip error: "
 880                                         "got %02x expecting %02x\n", dev->name, buffer[0],
 881                                         ContDatagramHeaderSkip);
 882                         stats->rx_length_errors++;
 883                         insw(ioaddr, buffer, ContDatagramDataSize / 2);
 884                         goto bad_frame_next;
 885                 }
 886                 skb = lp->rx_skb[ns];
 887                 insw(ioaddr, skb_put(skb, ContDatagramDataSize),
 888                         ContDatagramDataSize / 2);
 889                 dlen = lp->rx_dlen[ns];
 890         }
 891         if (skb->len < dlen + TrailerSize) {
 892                 lp->rx_session_id[ns] &= ~0x40;
 893                 return 0;
 894         }
 895
 896         /* datagram completed: send to upper level */
 897         skb_trim(skb, dlen);
 898         netif_rx(skb);
 899         dev->last_rx = jiffies;
 900         stats->rx_bytes+=dlen;
 901         stats->rx_packets++;
 902         lp->rx_skb[ns] = 0;
 903         lp->rx_session_id[ns] |= 0x40;
 904         return 0;
 905
 906 bad_frame:
 907         insw(ioaddr, buffer, FrameSize / 2);
 908         if (sb1000_debug > 1)
 909                 printk(KERN_WARNING "%s: frame error: got %02x %02x\n",
 910                         dev->name, st[0], st[1]);
 911         stats->rx_frame_errors++;
 912 bad_frame_next:
 913         if (sb1000_debug > 2)
 914                 sb1000_print_status_buffer(dev->name, st, buffer, FrameSize);
 915 dropped_frame:
 916         stats->rx_errors++;
 917         if (ns < NPIDS) {
 918                 if ((skb = lp->rx_skb[ns])) {
 919                         dev_kfree_skb(skb);
 920                         lp->rx_skb[ns] = 0;
 921                 }
 922                 lp->rx_session_id[ns] |= 0x40;
 923         }
 924         return -1;
 925 }
 926
 927 static inline void
 928 sb1000_error_dpc(struct net_device *dev)
 929 {
 930         char *name;
 931         unsigned char st[5];
 932         int ioaddr[2];
 933         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
 934         const unsigned char Command0[6] = {0x80, 0x26, 0x00, 0x00, 0x00, 0x00};
 935         const int ErrorDpcCounterInitialize = 200;
 936
 937         ioaddr[0] = dev->base_addr;
 938         /* rmem_end holds the second I/O address - fv */
 939         ioaddr[1] = dev->rmem_end;
 940         name = dev->name;
 941
 942         sb1000_wait_for_ready_clear(ioaddr, name);
 943         sb1000_send_command(ioaddr, name, Command0);
 944         sb1000_wait_for_ready(ioaddr, name);
 945         sb1000_read_status(ioaddr, st);
 946         if (st[1] & 0x10)
 947                 lp->rx_error_dpc_count = ErrorDpcCounterInitialize;
 948         return;
 949 }
 950
 951 \f
 952 /*
 953  * Linux interface functions
 954  */
 955 static int
 956 sb1000_open(struct net_device *dev)
 957 {
 958         char *name;
 959         int ioaddr[2], status;
 960         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
 961         const unsigned short FirmwareVersion[] = {0x01, 0x01};
 962
 963         ioaddr[0] = dev->base_addr;
 964         /* rmem_end holds the second I/O address - fv */
 965         ioaddr[1] = dev->rmem_end;
 966         name = dev->name;
 967
 968         /* initialize sb1000 */
 969         if ((status = sb1000_reset(ioaddr, name)))
 970                 return status;
 971         nicedelay(200000);
 972         if ((status = sb1000_check_CRC(ioaddr, name)))
 973                 return status;
 974
 975         /* initialize private data before board can catch interrupts */
 976         lp->rx_skb[0] = NULL;
 977         lp->rx_skb[1] = NULL;
 978         lp->rx_skb[2] = NULL;
 979         lp->rx_skb[3] = NULL;
 980         lp->rx_dlen[0] = 0;
 981         lp->rx_dlen[1] = 0;
 982         lp->rx_dlen[2] = 0;
 983         lp->rx_dlen[3] = 0;
 984         lp->rx_frames = 0;
 985         lp->rx_error_count = 0;
 986         lp->rx_error_dpc_count = 0;
 987         lp->rx_session_id[0] = 0x50;
 988         lp->rx_session_id[0] = 0x48;
 989         lp->rx_session_id[0] = 0x44;
 990         lp->rx_session_id[0] = 0x42;
 991         lp->rx_frame_id[0] = 0;
 992         lp->rx_frame_id[1] = 0;
 993         lp->rx_frame_id[2] = 0;
 994         lp->rx_frame_id[3] = 0;
 995         if (request_irq(dev->irq, &sb1000_interrupt, 0, "sb1000", dev)) {
 996                 return -EAGAIN;
 997         }
 998
 999         if (sb1000_debug > 2)
1000                 printk(KERN_DEBUG "%s: Opening, IRQ %d\n", name, dev->irq);
1001
1002         /* Activate board and check firmware version */
1003         udelay(1000);
1004         if ((status = sb1000_activate(ioaddr, name)))
1005                 return status;
1006         udelay(0);
1007         if ((status = sb1000_get_firmware_version(ioaddr, name, version, 0)))
1008                 return status;
1009         if (version[0] != FirmwareVersion[0] || version[1] != FirmwareVersion[1])
1010                 printk(KERN_WARNING "%s: found firmware version %x.%02x "
1011                         "(should be %x.%02x)\n", name, version[0], version[1],
1012                         FirmwareVersion[0], FirmwareVersion[1]);
1013
1014
1015         netif_start_queue(dev);
1016         return 0;                                       /* Always succeed */
1017 }
1018
1019 static int sb1000_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1020 {
1021         char* name;
1022         unsigned char version[2];
1023         short PID[4];
1024         int ioaddr[2], status, frequency;
1025         unsigned int stats[5];
1026         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
1027
1028         if (!(dev && dev->flags & IFF_UP))
1029                 return -ENODEV;
1030
1031         ioaddr[0] = dev->base_addr;
1032         /* rmem_end holds the second I/O address - fv */
1033         ioaddr[1] = dev->rmem_end;
1034         name = dev->name;
1035
1036         switch (cmd) {
1037         case SIOCGCMSTATS:              /* get statistics */
1038                 stats[0] = lp->stats.rx_bytes;
1039                 stats[1] = lp->rx_frames;
1040                 stats[2] = lp->stats.rx_packets;
1041                 stats[3] = lp->stats.rx_errors;
1042                 stats[4] = lp->stats.rx_dropped;
1043                 if(copy_to_user(ifr->ifr_data, stats, sizeof(stats)))
1044                         return -EFAULT;
1045                 status = 0;
1046                 break;
1047
1048         case SIOCGCMFIRMWARE:           /* get firmware version */
1049                 if ((status = sb1000_get_firmware_version(ioaddr, name, version, 1)))
1050                         return status;
1051                 if(copy_to_user(ifr->ifr_data, version, sizeof(version)))
1052                         return -EFAULT;
1053                 break;
1054
1055         case SIOCGCMFREQUENCY:          /* get frequency */
1056                 if ((status = sb1000_get_frequency(ioaddr, name, &frequency)))
1057                         return status;
1058                 if(put_user(frequency, (int*) ifr->ifr_data))
1059                         return -EFAULT;
1060                 break;
1061
1062         case SIOCSCMFREQUENCY:          /* set frequency */
1063                 if (!capable(CAP_NET_ADMIN))
1064                         return -EPERM;
1065                 if(get_user(frequency, (int*) ifr->ifr_data))
1066                         return -EFAULT;
1067                 if ((status = sb1000_set_frequency(ioaddr, name, frequency)))
1068                         return status;
1069                 break;
1070
1071         case SIOCGCMPIDS:                       /* get PIDs */
1072                 if ((status = sb1000_get_PIDs(ioaddr, name, PID)))
1073                         return status;
1074                 if(copy_to_user(ifr->ifr_data, PID, sizeof(PID)))
1075                         return -EFAULT;
1076                 break;
1077
1078         case SIOCSCMPIDS:                       /* set PIDs */
1079                 if (!capable(CAP_NET_ADMIN))
1080                         return -EPERM;
1081                 if(copy_from_user(PID, ifr->ifr_data, sizeof(PID)))
1082                         return -EFAULT;
1083                 if ((status = sb1000_set_PIDs(ioaddr, name, PID)))
1084                         return status;
1085                 /* set session_id, frame_id and pkt_type too */
1086                 lp->rx_session_id[0] = 0x50 | (PID[0] & 0x0f);
1087                 lp->rx_session_id[1] = 0x48;
1088                 lp->rx_session_id[2] = 0x44;
1089                 lp->rx_session_id[3] = 0x42;
1090                 lp->rx_frame_id[0] = 0;
1091                 lp->rx_frame_id[1] = 0;
1092                 lp->rx_frame_id[2] = 0;
1093                 lp->rx_frame_id[3] = 0;
1094                 break;
1095
1096         default:
1097                 status = -EINVAL;
1098                 break;
1099         }
1100         return status;
1101 }
1102
1103 /* transmit function: do nothing since SB1000 can't send anything out */
1104 static int
1105 sb1000_start_xmit(struct sk_buff *skb, struct net_device *dev)
1106 {
1107         printk(KERN_WARNING "%s: trying to transmit!!!\n", dev->name);
1108         /* sb1000 can't xmit datagrams */
1109         dev_kfree_skb(skb);
1110         return 0;
1111 }
1112
1113 /* SB1000 interrupt handler. */
1114 static void sb1000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1115 {
1116         char *name;
1117         unsigned char st;
1118         int ioaddr[2];
1119         struct net_device *dev = (struct net_device *) dev_id;
1120         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
1121
1122         const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
1123         const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
1124         const int MaxRxErrorCount = 6;
1125
1126         if (dev == NULL) {
1127                 printk(KERN_ERR "sb1000_interrupt(): irq %d for unknown device.\n",
1128                         irq);
1129                 return;
1130         }
1131
1132         ioaddr[0] = dev->base_addr;
1133         /* rmem_end holds the second I/O address - fv */
1134         ioaddr[1] = dev->rmem_end;
1135         name = dev->name;
1136
1137         /* is it a good interrupt? */
1138         st = inb(ioaddr[1] + 6);
1139         if (!(st & 0x08 && st & 0x20)) {
1140                 return;
1141         }
1142
1143         if (sb1000_debug > 3)
1144                 printk(KERN_DEBUG "%s: entering interrupt\n", dev->name);
1145
1146         st = inb(ioaddr[0] + 7);
1147         if (sb1000_rx(dev))
1148                 lp->rx_error_count++;
1149 #ifdef SB1000_DELAY
1150         udelay(SB1000_DELAY);
1151 #endif /* SB1000_DELAY */
1152         sb1000_issue_read_command(ioaddr, name);
1153         if (st & 0x01) {
1154                 sb1000_error_dpc(dev);
1155                 sb1000_issue_read_command(ioaddr, name);
1156         }
1157         if (lp->rx_error_dpc_count && !(--lp->rx_error_dpc_count)) {
1158                 sb1000_wait_for_ready_clear(ioaddr, name);
1159                 sb1000_send_command(ioaddr, name, Command0);
1160                 sb1000_wait_for_ready(ioaddr, name);
1161                 sb1000_issue_read_command(ioaddr, name);
1162         }
1163         if (lp->rx_error_count >= MaxRxErrorCount) {
1164                 sb1000_wait_for_ready_clear(ioaddr, name);
1165                 sb1000_send_command(ioaddr, name, Command1);
1166                 sb1000_wait_for_ready(ioaddr, name);
1167                 sb1000_issue_read_command(ioaddr, name);
1168                 lp->rx_error_count = 0;
1169         }
1170
1171         return;
1172 }
1173
1174 static struct net_device_stats *sb1000_stats(struct net_device *dev)
1175 {
1176         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
1177         return &lp->stats;
1178 }
1179
1180 static int sb1000_close(struct net_device *dev)
1181 {
1182         int i;
1183         int ioaddr[2];
1184         struct sb1000_private *lp = (struct sb1000_private *)dev->priv;
1185
1186         if (sb1000_debug > 2)
1187                 printk(KERN_DEBUG "%s: Shutting down sb1000.\n", dev->name);
1188
1189         netif_stop_queue(dev);
1190
1191         ioaddr[0] = dev->base_addr;
1192         /* rmem_end holds the second I/O address - fv */
1193         ioaddr[1] = dev->rmem_end;
1194
1195         free_irq(dev->irq, dev);
1196         /* If we don't do this, we can't re-insmod it later. */
1197         release_region(ioaddr[1], SB1000_IO_EXTENT);
1198         release_region(ioaddr[0], SB1000_IO_EXTENT);
1199
1200         /* free rx_skb's if needed */
1201         for (i=0; i<4; i++) {
1202                 if (lp->rx_skb[i]) {
1203                         dev_kfree_skb(lp->rx_skb[i]);
1204                 }
1205         }
1206         return 0;
1207 }
1208
1209 #ifdef MODULE
1210 MODULE_AUTHOR("Franco Venturi <fventuri@mediaone.net>");
1211 MODULE_DESCRIPTION("General Instruments SB1000 driver");
1212 MODULE_LICENSE("GPL");
1213
1214 MODULE_PARM(io, "1-2i");
1215 MODULE_PARM(irq, "i");
1216 MODULE_PARM_DESC(io, "SB1000 I/O base addresses");
1217 MODULE_PARM_DESC(irq, "SB1000 IRQ number");
1218
1219 static struct net_device dev_sb1000;
1220 static int io[2];
1221 static int irq;
1222
1223 int
1224 init_module(void)
1225 {
1226         int i;
1227         for (i = 0; i < 100; i++) {
1228                 sprintf(dev_sb1000.name, "cm%d", i);
1229                 if (dev_get(dev_sb1000.name) == 0) break;
1230         }
1231         if (i == 100) {
1232                 printk(KERN_ERR "sb1000: can't register any device cm<n>\n");
1233                 return -ENFILE;
1234         }
1235         dev_sb1000.init = sb1000_probe;
1236         dev_sb1000.base_addr = io[0];
1237         /* rmem_end holds the second I/O address - fv */
1238         dev_sb1000.rmem_end = io[1];
1239         dev_sb1000.irq = irq;
1240         if (register_netdev(&dev_sb1000) != 0) {
1241                 printk(KERN_ERR "sb1000: failed to register device (io: %03x,%03x   "
1242                         "irq: %d)\n", io[0], io[1], irq);
1243                 return -EIO;
1244         }
1245         return 0;
1246 }
1247
1248 void cleanup_module(void)
1249 {
1250         unregister_netdev(&dev_sb1000);
1251         release_region(dev_sb1000.base_addr, 16);
1252         release_region(dev_sb1000.rmem_end, 16);
1253         kfree(dev_sb1000.priv);
1254         dev_sb1000.priv = NULL;
1255 }
1256 #endif /* MODULE */
1257 \f
1258 /*
1259  * Local variables:
1260  *  compile-command: "gcc -D__KERNEL__ -DMODULE -Wall -Wstrict-prototypes -O -m486 -c sb1000.c"
1261  *  version-control: t
1262  *  tab-width: 4
1263  *  c-basic-offset: 4
1264  * End:
1265  */