drivers/net/apne.c

   1 /*
   2  * Amiga Linux/68k 8390 based PCMCIA Ethernet Driver for the Amiga 1200
   3  *
   4  * (C) Copyright 1997 Alain Malek
   5  *                    (Alain.Malek@cryogen.com)
   6  *
   7  * ----------------------------------------------------------------------------
   8  *
   9  * This program is based on
  10  *
  11  * ne.c:       A general non-shared-memory NS8390 ethernet driver for linux
  12  *             Written 1992-94 by Donald Becker.
  13  *
  14  * 8390.c:     A general NS8390 ethernet driver core for linux.
  15  *             Written 1992-94 by Donald Becker.
  16  *
  17  * cnetdevice: A Sana-II ethernet driver for AmigaOS
  18  *             Written by Bruce Abbott (bhabbott@inhb.co.nz)
  19  *
  20  * ----------------------------------------------------------------------------
  21  *
  22  * This file is subject to the terms and conditions of the GNU General Public
  23  * License.  See the file COPYING in the main directory of the Linux
  24  * distribution for more details.
  25  *
  26  * ----------------------------------------------------------------------------
  27  *
  28  */
  29
  30
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/errno.h>
  34 #include <linux/pci.h>
  35 #include <linux/init.h>
  36 #include <linux/delay.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/jiffies.h>
  41
  42 #include <asm/system.h>
  43 #include <asm/io.h>
  44 #include <asm/setup.h>
  45 #include <asm/amigaints.h>
  46 #include <asm/amigahw.h>
  47 #include <asm/amigayle.h>
  48 #include <asm/amipcmcia.h>
  49
  50 #include "8390.h"
  51
  52 /* ---- No user-serviceable parts below ---- */
  53
  54 #define DRV_NAME "apne"
  55
  56 #define NE_BASE  (dev->base_addr)
  57 #define NE_CMD                  0x00
  58 #define NE_DATAPORT             0x10            /* NatSemi-defined port window offset. */
  59 #define NE_RESET                0x1f            /* Issue a read to reset, a write to clear. */
  60 #define NE_IO_EXTENT            0x20
  61
  62 #define NE_EN0_ISR              0x07
  63 #define NE_EN0_DCFG             0x0e
  64
  65 #define NE_EN0_RSARLO           0x08
  66 #define NE_EN0_RSARHI           0x09
  67 #define NE_EN0_RCNTLO           0x0a
  68 #define NE_EN0_RXCR             0x0c
  69 #define NE_EN0_TXCR             0x0d
  70 #define NE_EN0_RCNTHI           0x0b
  71 #define NE_EN0_IMR              0x0f
  72
  73 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
  74 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
  75 #define NESM_START_PG   0x40    /* First page of TX buffer */
  76 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  77
  78
  79 struct net_device * __init apne_probe(int unit);
  80 static int apne_probe1(struct net_device *dev, int ioaddr);
  81
  82 static void apne_reset_8390(struct net_device *dev);
  83 static void apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
  84                           int ring_page);
  85 static void apne_block_input(struct net_device *dev, int count,
  86                                                                 struct sk_buff *skb, int ring_offset);
  87 static void apne_block_output(struct net_device *dev, const int count,
  88                                                         const unsigned char *buf, const int start_page);
  89 static irqreturn_t apne_interrupt(int irq, void *dev_id);
  90
  91 static int init_pcmcia(void);
  92
  93 /* IO base address used for nic */
  94
  95 #define IOBASE 0x300
  96
  97 /*
  98    use MANUAL_CONFIG and MANUAL_OFFSET for enabling IO by hand
  99    you can find the values to use by looking at the cnet.device
 100    config file example (the default values are for the CNET40BC card)
 101 */
 102
 103 /*
 104 #define MANUAL_CONFIG 0x20
 105 #define MANUAL_OFFSET 0x3f8
 106
 107 #define MANUAL_HWADDR0 0x00
 108 #define MANUAL_HWADDR1 0x12
 109 #define MANUAL_HWADDR2 0x34
 110 #define MANUAL_HWADDR3 0x56
 111 #define MANUAL_HWADDR4 0x78
 112 #define MANUAL_HWADDR5 0x9a
 113 */
 114
 115 static const char version[] =
 116     "apne.c:v1.1 7/10/98 Alain Malek (Alain.Malek@cryogen.ch)\n";
 117
 118 static int apne_owned;  /* signal if card already owned */
 119
 120 struct net_device * __init apne_probe(int unit)
 121 {
 122         struct net_device *dev;
 123 #ifndef MANUAL_CONFIG
 124         char tuple[8];
 125 #endif
 126         int err;
 127
 128         if (!MACH_IS_AMIGA)
 129                 return ERR_PTR(-ENODEV);
 130
 131         if (apne_owned)
 132                 return ERR_PTR(-ENODEV);
 133
 134         if ( !(AMIGAHW_PRESENT(PCMCIA)) )
 135                 return ERR_PTR(-ENODEV);
 136
 137         printk("Looking for PCMCIA ethernet card : ");
 138
 139         /* check if a card is inserted */
 140         if (!(PCMCIA_INSERTED)) {
 141                 printk("NO PCMCIA card inserted\n");
 142                 return ERR_PTR(-ENODEV);
 143         }
 144
 145         dev = alloc_ei_netdev();
 146         if (!dev)
 147                 return ERR_PTR(-ENOMEM);
 148         if (unit >= 0) {
 149                 sprintf(dev->name, "eth%d", unit);
 150                 netdev_boot_setup_check(dev);
 151         }
 152
 153         /* disable pcmcia irq for readtuple */
 154         pcmcia_disable_irq();
 155
 156 #ifndef MANUAL_CONFIG
 157         if ((pcmcia_copy_tuple(CISTPL_FUNCID, tuple, 8) < 3) ||
 158                 (tuple[2] != CISTPL_FUNCID_NETWORK)) {
 159                 printk("not an ethernet card\n");
 160                 /* XXX: shouldn't we re-enable irq here? */
 161                 free_netdev(dev);
 162                 return ERR_PTR(-ENODEV);
 163         }
 164 #endif
 165
 166         printk("ethernet PCMCIA card inserted\n");
 167
 168         if (!init_pcmcia()) {
 169                 /* XXX: shouldn't we re-enable irq here? */
 170                 free_netdev(dev);
 171                 return ERR_PTR(-ENODEV);
 172         }
 173
 174         if (!request_region(IOBASE, 0x20, DRV_NAME)) {
 175                 free_netdev(dev);
 176                 return ERR_PTR(-EBUSY);
 177         }
 178
 179         err = apne_probe1(dev, IOBASE);
 180         if (err) {
 181                 release_region(IOBASE, 0x20);
 182                 free_netdev(dev);
 183                 return ERR_PTR(err);
 184         }
 185         err = register_netdev(dev);
 186         if (!err)
 187                 return dev;
 188
 189         pcmcia_disable_irq();
 190         free_irq(IRQ_AMIGA_PORTS, dev);
 191         pcmcia_reset();
 192         release_region(IOBASE, 0x20);
 193         free_netdev(dev);
 194         return ERR_PTR(err);
 195 }
 196
 197 static int __init apne_probe1(struct net_device *dev, int ioaddr)
 198 {
 199     int i;
 200     unsigned char SA_prom[32];
 201     int wordlength = 2;
 202     const char *name = NULL;
 203     int start_page, stop_page;
 204 #ifndef MANUAL_HWADDR0
 205     int neX000, ctron;
 206 #endif
 207     static unsigned version_printed;
 208
 209     if (ei_debug  &&  version_printed++ == 0)
 210         printk(version);
 211
 212     printk("PCMCIA NE*000 ethercard probe");
 213
 214     /* Reset card. Who knows what dain-bramaged state it was left in. */
 215     {   unsigned long reset_start_time = jiffies;
 216
 217         outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 218
 219         while ((inb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 220                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 221                         printk(" not found (no reset ack).\n");
 222                         return -ENODEV;
 223                 }
 224
 225         outb(0xff, ioaddr + NE_EN0_ISR);                /* Ack all intr. */
 226     }
 227
 228 #ifndef MANUAL_HWADDR0
 229
 230     /* Read the 16 bytes of station address PROM.
 231        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 232        We can't reliably read the SAPROM address without this.
 233        (I learned the hard way!). */
 234     {
 235         struct {unsigned long value, offset; } program_seq[] = {
 236             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 237             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 238             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 239             {0x00,      NE_EN0_RCNTHI},
 240             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 241             {0xFF,      NE_EN0_ISR},
 242             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 243             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 244             {32,        NE_EN0_RCNTLO},
 245             {0x00,      NE_EN0_RCNTHI},
 246             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 247             {0x00,      NE_EN0_RSARHI},
 248             {E8390_RREAD+E8390_START, NE_CMD},
 249         };
 250         for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
 251             outb(program_seq[i].value, ioaddr + program_seq[i].offset);
 252         }
 253
 254     }
 255     for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
 256         SA_prom[i] = inb(ioaddr + NE_DATAPORT);
 257         SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
 258         if (SA_prom[i] != SA_prom[i+1])
 259             wordlength = 1;
 260     }
 261
 262     /*  At this point, wordlength *only* tells us if the SA_prom is doubled
 263         up or not because some broken PCI cards don't respect the byte-wide
 264         request in program_seq above, and hence don't have doubled up values.
 265         These broken cards would otherwise be detected as an ne1000.  */
 266
 267     if (wordlength == 2)
 268         for (i = 0; i < 16; i++)
 269                 SA_prom[i] = SA_prom[i+i];
 270
 271     if (wordlength == 2) {
 272         /* We must set the 8390 for word mode. */
 273         outb(0x49, ioaddr + NE_EN0_DCFG);
 274         start_page = NESM_START_PG;
 275         stop_page = NESM_STOP_PG;
 276     } else {
 277         start_page = NE1SM_START_PG;
 278         stop_page = NE1SM_STOP_PG;
 279     }
 280
 281     neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
 282     ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
 283
 284     /* Set up the rest of the parameters. */
 285     if (neX000) {
 286         name = (wordlength == 2) ? "NE2000" : "NE1000";
 287     } else if (ctron) {
 288         name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
 289         start_page = 0x01;
 290         stop_page = (wordlength == 2) ? 0x40 : 0x20;
 291     } else {
 292         printk(" not found.\n");
 293         return -ENXIO;
 294
 295     }
 296
 297 #else
 298     wordlength = 2;
 299     /* We must set the 8390 for word mode. */
 300     outb(0x49, ioaddr + NE_EN0_DCFG);
 301     start_page = NESM_START_PG;
 302     stop_page = NESM_STOP_PG;
 303
 304     SA_prom[0] = MANUAL_HWADDR0;
 305     SA_prom[1] = MANUAL_HWADDR1;
 306     SA_prom[2] = MANUAL_HWADDR2;
 307     SA_prom[3] = MANUAL_HWADDR3;
 308     SA_prom[4] = MANUAL_HWADDR4;
 309     SA_prom[5] = MANUAL_HWADDR5;
 310     name = "NE2000";
 311 #endif
 312
 313     dev->base_addr = ioaddr;
 314     dev->irq = IRQ_AMIGA_PORTS;
 315     dev->netdev_ops = &ei_netdev_ops;
 316
 317     /* Install the Interrupt handler */
 318     i = request_irq(dev->irq, apne_interrupt, IRQF_SHARED, DRV_NAME, dev);
 319     if (i) return i;
 320
 321     for(i = 0; i < ETHER_ADDR_LEN; i++)
 322         dev->dev_addr[i] = SA_prom[i];
 323
 324     printk(" %pM\n", dev->dev_addr);
 325
 326     printk("%s: %s found.\n", dev->name, name);
 327
 328     ei_status.name = name;
 329     ei_status.tx_start_page = start_page;
 330     ei_status.stop_page = stop_page;
 331     ei_status.word16 = (wordlength == 2);
 332
 333     ei_status.rx_start_page = start_page + TX_PAGES;
 334
 335     ei_status.reset_8390 = &apne_reset_8390;
 336     ei_status.block_input = &apne_block_input;
 337     ei_status.block_output = &apne_block_output;
 338     ei_status.get_8390_hdr = &apne_get_8390_hdr;
 339
 340     NS8390_init(dev, 0);
 341
 342     pcmcia_ack_int(pcmcia_get_intreq());                /* ack PCMCIA int req */
 343     pcmcia_enable_irq();
 344
 345     apne_owned = 1;
 346
 347     return 0;
 348 }
 349
 350 /* Hard reset the card.  This used to pause for the same period that a
 351    8390 reset command required, but that shouldn't be necessary. */
 352 static void
 353 apne_reset_8390(struct net_device *dev)
 354 {
 355     unsigned long reset_start_time = jiffies;
 356
 357     init_pcmcia();
 358
 359     if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
 360
 361     outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 362
 363     ei_status.txing = 0;
 364     ei_status.dmaing = 0;
 365
 366     /* This check _should_not_ be necessary, omit eventually. */
 367     while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 368         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 369             printk("%s: ne_reset_8390() did not complete.\n", dev->name);
 370             break;
 371         }
 372     outb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr. */
 373 }
 374
 375 /* Grab the 8390 specific header. Similar to the block_input routine, but
 376    we don't need to be concerned with ring wrap as the header will be at
 377    the start of a page, so we optimize accordingly. */
 378
 379 static void
 380 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 381 {
 382
 383     int nic_base = dev->base_addr;
 384     int cnt;
 385     char *ptrc;
 386     short *ptrs;
 387
 388     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 389     if (ei_status.dmaing) {
 390         printk("%s: DMAing conflict in ne_get_8390_hdr "
 391            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 392            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 393         return;
 394     }
 395
 396     ei_status.dmaing |= 0x01;
 397     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 398     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 399     outb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 400     outb(0, nic_base + NE_EN0_RCNTHI);
 401     outb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 402     outb(ring_page, nic_base + NE_EN0_RSARHI);
 403     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 404
 405     if (ei_status.word16) {
 406         ptrs = (short*)hdr;
 407         for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 408             *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 409     } else {
 410         ptrc = (char*)hdr;
 411         for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
 412             *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 413     }
 414
 415     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 416     ei_status.dmaing &= ~0x01;
 417
 418     le16_to_cpus(&hdr->count);
 419 }
 420
 421 /* Block input and output, similar to the Crynwr packet driver.  If you
 422    are porting to a new ethercard, look at the packet driver source for hints.
 423    The NEx000 doesn't share the on-board packet memory -- you have to put
 424    the packet out through the "remote DMA" dataport using outb. */
 425
 426 static void
 427 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 428 {
 429     int nic_base = dev->base_addr;
 430     char *buf = skb->data;
 431     char *ptrc;
 432     short *ptrs;
 433     int cnt;
 434
 435     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 436     if (ei_status.dmaing) {
 437         printk("%s: DMAing conflict in ne_block_input "
 438            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 439            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 440         return;
 441     }
 442     ei_status.dmaing |= 0x01;
 443     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 444     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 445     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 446     outb(count >> 8, nic_base + NE_EN0_RCNTHI);
 447     outb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 448     outb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 449     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 450     if (ei_status.word16) {
 451       ptrs = (short*)buf;
 452       for (cnt = 0; cnt < (count>>1); cnt++)
 453         *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 454       if (count & 0x01) {
 455         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 456       }
 457     } else {
 458       ptrc = (char*)buf;
 459       for (cnt = 0; cnt < count; cnt++)
 460         *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 461     }
 462
 463     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 464     ei_status.dmaing &= ~0x01;
 465 }
 466
 467 static void
 468 apne_block_output(struct net_device *dev, int count,
 469                 const unsigned char *buf, const int start_page)
 470 {
 471     int nic_base = NE_BASE;
 472     unsigned long dma_start;
 473     char *ptrc;
 474     short *ptrs;
 475     int cnt;
 476
 477     /* Round the count up for word writes.  Do we need to do this?
 478        What effect will an odd byte count have on the 8390?
 479        I should check someday. */
 480     if (ei_status.word16 && (count & 0x01))
 481       count++;
 482
 483     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 484     if (ei_status.dmaing) {
 485         printk("%s: DMAing conflict in ne_block_output."
 486            "[DMAstat:%d][irqlock:%d][intr:%d]\n",
 487            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 488         return;
 489     }
 490     ei_status.dmaing |= 0x01;
 491     /* We should already be in page 0, but to be safe... */
 492     outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 493
 494     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 495
 496    /* Now the normal output. */
 497     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 498     outb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 499     outb(0x00, nic_base + NE_EN0_RSARLO);
 500     outb(start_page, nic_base + NE_EN0_RSARHI);
 501
 502     outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 503     if (ei_status.word16) {
 504         ptrs = (short*)buf;
 505         for (cnt = 0; cnt < count>>1; cnt++)
 506             outw(*ptrs++, NE_BASE+NE_DATAPORT);
 507     } else {
 508         ptrc = (char*)buf;
 509         for (cnt = 0; cnt < count; cnt++)
 510             outb(*ptrc++, NE_BASE + NE_DATAPORT);
 511     }
 512
 513     dma_start = jiffies;
 514
 515     while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 516         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 517                 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 518                 apne_reset_8390(dev);
 519                 NS8390_init(dev,1);
 520                 break;
 521         }
 522
 523     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 524     ei_status.dmaing &= ~0x01;
 525 }
 526
 527 static irqreturn_t apne_interrupt(int irq, void *dev_id)
 528 {
 529     unsigned char pcmcia_intreq;
 530
 531     if (!(gayle.inten & GAYLE_IRQ_IRQ))
 532         return IRQ_NONE;
 533
 534     pcmcia_intreq = pcmcia_get_intreq();
 535
 536     if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
 537         pcmcia_ack_int(pcmcia_intreq);
 538         return IRQ_NONE;
 539     }
 540     if (ei_debug > 3)
 541         printk("pcmcia intreq = %x\n", pcmcia_intreq);
 542     pcmcia_disable_irq();                       /* to get rid of the sti() within ei_interrupt */
 543     ei_interrupt(irq, dev_id);
 544     pcmcia_ack_int(pcmcia_get_intreq());
 545     pcmcia_enable_irq();
 546     return IRQ_HANDLED;
 547 }
 548
 549 #ifdef MODULE
 550 static struct net_device *apne_dev;
 551
 552 static int __init apne_module_init(void)
 553 {
 554         apne_dev = apne_probe(-1);
 555         if (IS_ERR(apne_dev))
 556                 return PTR_ERR(apne_dev);
 557         return 0;
 558 }
 559
 560 static void __exit apne_module_exit(void)
 561 {
 562         unregister_netdev(apne_dev);
 563
 564         pcmcia_disable_irq();
 565
 566         free_irq(IRQ_AMIGA_PORTS, apne_dev);
 567
 568         pcmcia_reset();
 569
 570         release_region(IOBASE, 0x20);
 571
 572         free_netdev(apne_dev);
 573 }
 574 module_init(apne_module_init);
 575 module_exit(apne_module_exit);
 576 #endif
 577
 578 static int init_pcmcia(void)
 579 {
 580         u_char config;
 581 #ifndef MANUAL_CONFIG
 582         u_char tuple[32];
 583         int offset_len;
 584 #endif
 585         u_long offset;
 586
 587         pcmcia_reset();
 588         pcmcia_program_voltage(PCMCIA_0V);
 589         pcmcia_access_speed(PCMCIA_SPEED_250NS);
 590         pcmcia_write_enable();
 591
 592 #ifdef MANUAL_CONFIG
 593         config = MANUAL_CONFIG;
 594 #else
 595         /* get and write config byte to enable IO port */
 596
 597         if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
 598                 return 0;
 599
 600         config = tuple[2] & 0x3f;
 601 #endif
 602 #ifdef MANUAL_OFFSET
 603         offset = MANUAL_OFFSET;
 604 #else
 605         if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
 606                 return 0;
 607
 608         offset_len = (tuple[2] & 0x3) + 1;
 609         offset = 0;
 610         while(offset_len--) {
 611                 offset = (offset << 8) | tuple[4+offset_len];
 612         }
 613 #endif
 614
 615         out_8(GAYLE_ATTRIBUTE+offset, config);
 616
 617         return 1;
 618 }
 619
 620 MODULE_LICENSE("GPL");