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/jiffies.h>
  40
  41 #include <asm/system.h>
  42 #include <asm/io.h>
  43 #include <asm/setup.h>
  44 #include <asm/amigaints.h>
  45 #include <asm/amigahw.h>
  46 #include <asm/amigayle.h>
  47 #include <asm/amipcmcia.h>
  48
  49 #include "8390.h"
  50
  51 /* ---- No user-serviceable parts below ---- */
  52
  53 #define DRV_NAME "apne"
  54
  55 #define NE_BASE  (dev->base_addr)
  56 #define NE_CMD                  0x00
  57 #define NE_DATAPORT             0x10            /* NatSemi-defined port window offset. */
  58 #define NE_RESET                0x1f            /* Issue a read to reset, a write to clear. */
  59 #define NE_IO_EXTENT            0x20
  60
  61 #define NE_EN0_ISR              0x07
  62 #define NE_EN0_DCFG             0x0e
  63
  64 #define NE_EN0_RSARLO           0x08
  65 #define NE_EN0_RSARHI           0x09
  66 #define NE_EN0_RCNTLO           0x0a
  67 #define NE_EN0_RXCR             0x0c
  68 #define NE_EN0_TXCR             0x0d
  69 #define NE_EN0_RCNTHI           0x0b
  70 #define NE_EN0_IMR              0x0f
  71
  72 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
  73 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
  74 #define NESM_START_PG   0x40    /* First page of TX buffer */
  75 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  76
  77
  78 struct net_device * __init apne_probe(int unit);
  79 static int apne_probe1(struct net_device *dev, int ioaddr);
  80
  81 static int apne_open(struct net_device *dev);
  82 static int apne_close(struct net_device *dev);
  83
  84 static void apne_reset_8390(struct net_device *dev);
  85 static void apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
  86                           int ring_page);
  87 static void apne_block_input(struct net_device *dev, int count,
  88                                                                 struct sk_buff *skb, int ring_offset);
  89 static void apne_block_output(struct net_device *dev, const int count,
  90                                                         const unsigned char *buf, const int start_page);
  91 static irqreturn_t apne_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  92
  93 static int init_pcmcia(void);
  94
  95 /* IO base address used for nic */
  96
  97 #define IOBASE 0x300
  98
  99 /*
 100    use MANUAL_CONFIG and MANUAL_OFFSET for enabling IO by hand
 101    you can find the values to use by looking at the cnet.device
 102    config file example (the default values are for the CNET40BC card)
 103 */
 104
 105 /*
 106 #define MANUAL_CONFIG 0x20
 107 #define MANUAL_OFFSET 0x3f8
 108
 109 #define MANUAL_HWADDR0 0x00
 110 #define MANUAL_HWADDR1 0x12
 111 #define MANUAL_HWADDR2 0x34
 112 #define MANUAL_HWADDR3 0x56
 113 #define MANUAL_HWADDR4 0x78
 114 #define MANUAL_HWADDR5 0x9a
 115 */
 116
 117 static const char version[] =
 118     "apne.c:v1.1 7/10/98 Alain Malek (Alain.Malek@cryogen.ch)\n";
 119
 120 static int apne_owned;  /* signal if card already owned */
 121
 122 struct net_device * __init apne_probe(int unit)
 123 {
 124         struct net_device *dev;
 125 #ifndef MANUAL_CONFIG
 126         char tuple[8];
 127 #endif
 128         int err;
 129
 130         if (apne_owned)
 131                 return ERR_PTR(-ENODEV);
 132
 133         if ( !(AMIGAHW_PRESENT(PCMCIA)) )
 134                 return ERR_PTR(-ENODEV);
 135
 136         printk("Looking for PCMCIA ethernet card : ");
 137
 138         /* check if a card is inserted */
 139         if (!(PCMCIA_INSERTED)) {
 140                 printk("NO PCMCIA card inserted\n");
 141                 return ERR_PTR(-ENODEV);
 142         }
 143
 144         dev = alloc_ei_netdev();
 145         if (!dev)
 146                 return ERR_PTR(-ENOMEM);
 147         if (unit >= 0) {
 148                 sprintf(dev->name, "eth%d", unit);
 149                 netdev_boot_setup_check(dev);
 150         }
 151         SET_MODULE_OWNER(dev);
 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 < sizeof(program_seq)/sizeof(program_seq[0]); 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
 315     /* Install the Interrupt handler */
 316     i = request_irq(IRQ_AMIGA_PORTS, apne_interrupt, SA_SHIRQ, DRV_NAME, dev);
 317     if (i) return i;
 318
 319     for(i = 0; i < ETHER_ADDR_LEN; i++) {
 320         printk(" %2.2x", SA_prom[i]);
 321         dev->dev_addr[i] = SA_prom[i];
 322     }
 323
 324     printk("\n%s: %s found.\n", dev->name, name);
 325
 326     ei_status.name = name;
 327     ei_status.tx_start_page = start_page;
 328     ei_status.stop_page = stop_page;
 329     ei_status.word16 = (wordlength == 2);
 330
 331     ei_status.rx_start_page = start_page + TX_PAGES;
 332
 333     ei_status.reset_8390 = &apne_reset_8390;
 334     ei_status.block_input = &apne_block_input;
 335     ei_status.block_output = &apne_block_output;
 336     ei_status.get_8390_hdr = &apne_get_8390_hdr;
 337     dev->open = &apne_open;
 338     dev->stop = &apne_close;
 339 #ifdef CONFIG_NET_POLL_CONTROLLER
 340     dev->poll_controller = ei_poll;
 341 #endif
 342     NS8390_init(dev, 0);
 343
 344     pcmcia_ack_int(pcmcia_get_intreq());                /* ack PCMCIA int req */
 345     pcmcia_enable_irq();
 346
 347     apne_owned = 1;
 348
 349     return 0;
 350 }
 351
 352 static int
 353 apne_open(struct net_device *dev)
 354 {
 355     ei_open(dev);
 356     return 0;
 357 }
 358
 359 static int
 360 apne_close(struct net_device *dev)
 361 {
 362     if (ei_debug > 1)
 363         printk("%s: Shutting down ethercard.\n", dev->name);
 364     ei_close(dev);
 365     return 0;
 366 }
 367
 368 /* Hard reset the card.  This used to pause for the same period that a
 369    8390 reset command required, but that shouldn't be necessary. */
 370 static void
 371 apne_reset_8390(struct net_device *dev)
 372 {
 373     unsigned long reset_start_time = jiffies;
 374
 375     init_pcmcia();
 376
 377     if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
 378
 379     outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 380
 381     ei_status.txing = 0;
 382     ei_status.dmaing = 0;
 383
 384     /* This check _should_not_ be necessary, omit eventually. */
 385     while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 386         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 387             printk("%s: ne_reset_8390() did not complete.\n", dev->name);
 388             break;
 389         }
 390     outb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr. */
 391 }
 392
 393 /* Grab the 8390 specific header. Similar to the block_input routine, but
 394    we don't need to be concerned with ring wrap as the header will be at
 395    the start of a page, so we optimize accordingly. */
 396
 397 static void
 398 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 399 {
 400
 401     int nic_base = dev->base_addr;
 402     int cnt;
 403     char *ptrc;
 404     short *ptrs;
 405
 406     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 407     if (ei_status.dmaing) {
 408         printk("%s: DMAing conflict in ne_get_8390_hdr "
 409            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 410            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 411         return;
 412     }
 413
 414     ei_status.dmaing |= 0x01;
 415     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 416     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 417     outb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 418     outb(0, nic_base + NE_EN0_RCNTHI);
 419     outb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 420     outb(ring_page, nic_base + NE_EN0_RSARHI);
 421     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 422
 423     if (ei_status.word16) {
 424         ptrs = (short*)hdr;
 425         for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 426             *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 427     } else {
 428         ptrc = (char*)hdr;
 429         for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
 430             *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 431     }
 432
 433     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 434     ei_status.dmaing &= ~0x01;
 435
 436     le16_to_cpus(&hdr->count);
 437 }
 438
 439 /* Block input and output, similar to the Crynwr packet driver.  If you
 440    are porting to a new ethercard, look at the packet driver source for hints.
 441    The NEx000 doesn't share the on-board packet memory -- you have to put
 442    the packet out through the "remote DMA" dataport using outb. */
 443
 444 static void
 445 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 446 {
 447     int nic_base = dev->base_addr;
 448     char *buf = skb->data;
 449     char *ptrc;
 450     short *ptrs;
 451     int cnt;
 452
 453     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 454     if (ei_status.dmaing) {
 455         printk("%s: DMAing conflict in ne_block_input "
 456            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 457            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 458         return;
 459     }
 460     ei_status.dmaing |= 0x01;
 461     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 462     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 463     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 464     outb(count >> 8, nic_base + NE_EN0_RCNTHI);
 465     outb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 466     outb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 467     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 468     if (ei_status.word16) {
 469       ptrs = (short*)buf;
 470       for (cnt = 0; cnt < (count>>1); cnt++)
 471         *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 472       if (count & 0x01) {
 473         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 474       }
 475     } else {
 476       ptrc = (char*)buf;
 477       for (cnt = 0; cnt < count; cnt++)
 478         *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 479     }
 480
 481     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 482     ei_status.dmaing &= ~0x01;
 483 }
 484
 485 static void
 486 apne_block_output(struct net_device *dev, int count,
 487                 const unsigned char *buf, const int start_page)
 488 {
 489     int nic_base = NE_BASE;
 490     unsigned long dma_start;
 491     char *ptrc;
 492     short *ptrs;
 493     int cnt;
 494
 495     /* Round the count up for word writes.  Do we need to do this?
 496        What effect will an odd byte count have on the 8390?
 497        I should check someday. */
 498     if (ei_status.word16 && (count & 0x01))
 499       count++;
 500
 501     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 502     if (ei_status.dmaing) {
 503         printk("%s: DMAing conflict in ne_block_output."
 504            "[DMAstat:%d][irqlock:%d][intr:%d]\n",
 505            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 506         return;
 507     }
 508     ei_status.dmaing |= 0x01;
 509     /* We should already be in page 0, but to be safe... */
 510     outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 511
 512     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 513
 514    /* Now the normal output. */
 515     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 516     outb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 517     outb(0x00, nic_base + NE_EN0_RSARLO);
 518     outb(start_page, nic_base + NE_EN0_RSARHI);
 519
 520     outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 521     if (ei_status.word16) {
 522         ptrs = (short*)buf;
 523         for (cnt = 0; cnt < count>>1; cnt++)
 524             outw(*ptrs++, NE_BASE+NE_DATAPORT);
 525     } else {
 526         ptrc = (char*)buf;
 527         for (cnt = 0; cnt < count; cnt++)
 528             outb(*ptrc++, NE_BASE + NE_DATAPORT);
 529     }
 530
 531     dma_start = jiffies;
 532
 533     while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 534         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 535                 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 536                 apne_reset_8390(dev);
 537                 NS8390_init(dev,1);
 538                 break;
 539         }
 540
 541     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 542     ei_status.dmaing &= ~0x01;
 543     return;
 544 }
 545
 546 static irqreturn_t apne_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 547 {
 548     unsigned char pcmcia_intreq;
 549
 550     if (!(gayle.inten & GAYLE_IRQ_IRQ))
 551         return IRQ_NONE;
 552
 553     pcmcia_intreq = pcmcia_get_intreq();
 554
 555     if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
 556         pcmcia_ack_int(pcmcia_intreq);
 557         return IRQ_NONE;
 558     }
 559     if (ei_debug > 3)
 560         printk("pcmcia intreq = %x\n", pcmcia_intreq);
 561     pcmcia_disable_irq();                       /* to get rid of the sti() within ei_interrupt */
 562     ei_interrupt(irq, dev_id, regs);
 563     pcmcia_ack_int(pcmcia_get_intreq());
 564     pcmcia_enable_irq();
 565     return IRQ_HANDLED;
 566 }
 567
 568 #ifdef MODULE
 569 static struct net_device *apne_dev;
 570
 571 int init_module(void)
 572 {
 573         apne_dev = apne_probe(-1);
 574         if (IS_ERR(apne_dev))
 575                 return PTR_ERR(apne_dev);
 576         return 0;
 577 }
 578
 579 void cleanup_module(void)
 580 {
 581         unregister_netdev(apne_dev);
 582
 583         pcmcia_disable_irq();
 584
 585         free_irq(IRQ_AMIGA_PORTS, apne_dev);
 586
 587         pcmcia_reset();
 588
 589         release_region(IOBASE, 0x20);
 590
 591         free_netdev(apne_dev);
 592 }
 593
 594 #endif
 595
 596 static int init_pcmcia(void)
 597 {
 598         u_char config;
 599 #ifndef MANUAL_CONFIG
 600         u_char tuple[32];
 601         int offset_len;
 602 #endif
 603         u_long offset;
 604
 605         pcmcia_reset();
 606         pcmcia_program_voltage(PCMCIA_0V);
 607         pcmcia_access_speed(PCMCIA_SPEED_250NS);
 608         pcmcia_write_enable();
 609
 610 #ifdef MANUAL_CONFIG
 611         config = MANUAL_CONFIG;
 612 #else
 613         /* get and write config byte to enable IO port */
 614
 615         if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
 616                 return 0;
 617
 618         config = tuple[2] & 0x3f;
 619 #endif
 620 #ifdef MANUAL_OFFSET
 621         offset = MANUAL_OFFSET;
 622 #else
 623         if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
 624                 return 0;
 625
 626         offset_len = (tuple[2] & 0x3) + 1;
 627         offset = 0;
 628         while(offset_len--) {
 629                 offset = (offset << 8) | tuple[4+offset_len];
 630         }
 631 #endif
 632
 633         out_8(GAYLE_ATTRIBUTE+offset, config);
 634
 635         return 1;
 636 }
 637
 638 MODULE_LICENSE("GPL");