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);
  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 (!MACH_IS_AMIGA)
 131                 return ERR_PTR(-ENODEV);
 132
 133         if (apne_owned)
 134                 return ERR_PTR(-ENODEV);
 135
 136         if ( !(AMIGAHW_PRESENT(PCMCIA)) )
 137                 return ERR_PTR(-ENODEV);
 138
 139         printk("Looking for PCMCIA ethernet card : ");
 140
 141         /* check if a card is inserted */
 142         if (!(PCMCIA_INSERTED)) {
 143                 printk("NO PCMCIA card inserted\n");
 144                 return ERR_PTR(-ENODEV);
 145         }
 146
 147         dev = alloc_ei_netdev();
 148         if (!dev)
 149                 return ERR_PTR(-ENOMEM);
 150         if (unit >= 0) {
 151                 sprintf(dev->name, "eth%d", unit);
 152                 netdev_boot_setup_check(dev);
 153         }
 154
 155         /* disable pcmcia irq for readtuple */
 156         pcmcia_disable_irq();
 157
 158 #ifndef MANUAL_CONFIG
 159         if ((pcmcia_copy_tuple(CISTPL_FUNCID, tuple, 8) < 3) ||
 160                 (tuple[2] != CISTPL_FUNCID_NETWORK)) {
 161                 printk("not an ethernet card\n");
 162                 /* XXX: shouldn't we re-enable irq here? */
 163                 free_netdev(dev);
 164                 return ERR_PTR(-ENODEV);
 165         }
 166 #endif
 167
 168         printk("ethernet PCMCIA card inserted\n");
 169
 170         if (!init_pcmcia()) {
 171                 /* XXX: shouldn't we re-enable irq here? */
 172                 free_netdev(dev);
 173                 return ERR_PTR(-ENODEV);
 174         }
 175
 176         if (!request_region(IOBASE, 0x20, DRV_NAME)) {
 177                 free_netdev(dev);
 178                 return ERR_PTR(-EBUSY);
 179         }
 180
 181         err = apne_probe1(dev, IOBASE);
 182         if (err) {
 183                 release_region(IOBASE, 0x20);
 184                 free_netdev(dev);
 185                 return ERR_PTR(err);
 186         }
 187         err = register_netdev(dev);
 188         if (!err)
 189                 return dev;
 190
 191         pcmcia_disable_irq();
 192         free_irq(IRQ_AMIGA_PORTS, dev);
 193         pcmcia_reset();
 194         release_region(IOBASE, 0x20);
 195         free_netdev(dev);
 196         return ERR_PTR(err);
 197 }
 198
 199 static int __init apne_probe1(struct net_device *dev, int ioaddr)
 200 {
 201     int i;
 202     unsigned char SA_prom[32];
 203     int wordlength = 2;
 204     const char *name = NULL;
 205     int start_page, stop_page;
 206 #ifndef MANUAL_HWADDR0
 207     int neX000, ctron;
 208 #endif
 209     static unsigned version_printed;
 210     DECLARE_MAC_BUF(mac);
 211
 212     if (ei_debug  &&  version_printed++ == 0)
 213         printk(version);
 214
 215     printk("PCMCIA NE*000 ethercard probe");
 216
 217     /* Reset card. Who knows what dain-bramaged state it was left in. */
 218     {   unsigned long reset_start_time = jiffies;
 219
 220         outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 221
 222         while ((inb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 223                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 224                         printk(" not found (no reset ack).\n");
 225                         return -ENODEV;
 226                 }
 227
 228         outb(0xff, ioaddr + NE_EN0_ISR);                /* Ack all intr. */
 229     }
 230
 231 #ifndef MANUAL_HWADDR0
 232
 233     /* Read the 16 bytes of station address PROM.
 234        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 235        We can't reliably read the SAPROM address without this.
 236        (I learned the hard way!). */
 237     {
 238         struct {unsigned long value, offset; } program_seq[] = {
 239             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 240             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 241             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 242             {0x00,      NE_EN0_RCNTHI},
 243             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 244             {0xFF,      NE_EN0_ISR},
 245             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 246             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 247             {32,        NE_EN0_RCNTLO},
 248             {0x00,      NE_EN0_RCNTHI},
 249             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 250             {0x00,      NE_EN0_RSARHI},
 251             {E8390_RREAD+E8390_START, NE_CMD},
 252         };
 253         for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
 254             outb(program_seq[i].value, ioaddr + program_seq[i].offset);
 255         }
 256
 257     }
 258     for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
 259         SA_prom[i] = inb(ioaddr + NE_DATAPORT);
 260         SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
 261         if (SA_prom[i] != SA_prom[i+1])
 262             wordlength = 1;
 263     }
 264
 265     /*  At this point, wordlength *only* tells us if the SA_prom is doubled
 266         up or not because some broken PCI cards don't respect the byte-wide
 267         request in program_seq above, and hence don't have doubled up values.
 268         These broken cards would otherwise be detected as an ne1000.  */
 269
 270     if (wordlength == 2)
 271         for (i = 0; i < 16; i++)
 272                 SA_prom[i] = SA_prom[i+i];
 273
 274     if (wordlength == 2) {
 275         /* We must set the 8390 for word mode. */
 276         outb(0x49, ioaddr + NE_EN0_DCFG);
 277         start_page = NESM_START_PG;
 278         stop_page = NESM_STOP_PG;
 279     } else {
 280         start_page = NE1SM_START_PG;
 281         stop_page = NE1SM_STOP_PG;
 282     }
 283
 284     neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
 285     ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
 286
 287     /* Set up the rest of the parameters. */
 288     if (neX000) {
 289         name = (wordlength == 2) ? "NE2000" : "NE1000";
 290     } else if (ctron) {
 291         name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
 292         start_page = 0x01;
 293         stop_page = (wordlength == 2) ? 0x40 : 0x20;
 294     } else {
 295         printk(" not found.\n");
 296         return -ENXIO;
 297
 298     }
 299
 300 #else
 301     wordlength = 2;
 302     /* We must set the 8390 for word mode. */
 303     outb(0x49, ioaddr + NE_EN0_DCFG);
 304     start_page = NESM_START_PG;
 305     stop_page = NESM_STOP_PG;
 306
 307     SA_prom[0] = MANUAL_HWADDR0;
 308     SA_prom[1] = MANUAL_HWADDR1;
 309     SA_prom[2] = MANUAL_HWADDR2;
 310     SA_prom[3] = MANUAL_HWADDR3;
 311     SA_prom[4] = MANUAL_HWADDR4;
 312     SA_prom[5] = MANUAL_HWADDR5;
 313     name = "NE2000";
 314 #endif
 315
 316     dev->base_addr = ioaddr;
 317     dev->irq = IRQ_AMIGA_PORTS;
 318
 319     /* Install the Interrupt handler */
 320     i = request_irq(dev->irq, apne_interrupt, IRQF_SHARED, DRV_NAME, dev);
 321     if (i) return i;
 322
 323     for(i = 0; i < ETHER_ADDR_LEN; i++)
 324         dev->dev_addr[i] = SA_prom[i];
 325
 326     printk(" %s\n", print_mac(mac, dev->dev_addr));
 327
 328     printk("%s: %s found.\n", dev->name, name);
 329
 330     ei_status.name = name;
 331     ei_status.tx_start_page = start_page;
 332     ei_status.stop_page = stop_page;
 333     ei_status.word16 = (wordlength == 2);
 334
 335     ei_status.rx_start_page = start_page + TX_PAGES;
 336
 337     ei_status.reset_8390 = &apne_reset_8390;
 338     ei_status.block_input = &apne_block_input;
 339     ei_status.block_output = &apne_block_output;
 340     ei_status.get_8390_hdr = &apne_get_8390_hdr;
 341     dev->open = &apne_open;
 342     dev->stop = &apne_close;
 343 #ifdef CONFIG_NET_POLL_CONTROLLER
 344     dev->poll_controller = ei_poll;
 345 #endif
 346     NS8390_init(dev, 0);
 347
 348     pcmcia_ack_int(pcmcia_get_intreq());                /* ack PCMCIA int req */
 349     pcmcia_enable_irq();
 350
 351     apne_owned = 1;
 352
 353     return 0;
 354 }
 355
 356 static int
 357 apne_open(struct net_device *dev)
 358 {
 359     ei_open(dev);
 360     return 0;
 361 }
 362
 363 static int
 364 apne_close(struct net_device *dev)
 365 {
 366     if (ei_debug > 1)
 367         printk("%s: Shutting down ethercard.\n", dev->name);
 368     ei_close(dev);
 369     return 0;
 370 }
 371
 372 /* Hard reset the card.  This used to pause for the same period that a
 373    8390 reset command required, but that shouldn't be necessary. */
 374 static void
 375 apne_reset_8390(struct net_device *dev)
 376 {
 377     unsigned long reset_start_time = jiffies;
 378
 379     init_pcmcia();
 380
 381     if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
 382
 383     outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 384
 385     ei_status.txing = 0;
 386     ei_status.dmaing = 0;
 387
 388     /* This check _should_not_ be necessary, omit eventually. */
 389     while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 390         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 391             printk("%s: ne_reset_8390() did not complete.\n", dev->name);
 392             break;
 393         }
 394     outb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr. */
 395 }
 396
 397 /* Grab the 8390 specific header. Similar to the block_input routine, but
 398    we don't need to be concerned with ring wrap as the header will be at
 399    the start of a page, so we optimize accordingly. */
 400
 401 static void
 402 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 403 {
 404
 405     int nic_base = dev->base_addr;
 406     int cnt;
 407     char *ptrc;
 408     short *ptrs;
 409
 410     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 411     if (ei_status.dmaing) {
 412         printk("%s: DMAing conflict in ne_get_8390_hdr "
 413            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 414            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 415         return;
 416     }
 417
 418     ei_status.dmaing |= 0x01;
 419     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 420     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 421     outb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 422     outb(0, nic_base + NE_EN0_RCNTHI);
 423     outb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 424     outb(ring_page, nic_base + NE_EN0_RSARHI);
 425     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 426
 427     if (ei_status.word16) {
 428         ptrs = (short*)hdr;
 429         for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 430             *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 431     } else {
 432         ptrc = (char*)hdr;
 433         for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
 434             *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 435     }
 436
 437     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 438     ei_status.dmaing &= ~0x01;
 439
 440     le16_to_cpus(&hdr->count);
 441 }
 442
 443 /* Block input and output, similar to the Crynwr packet driver.  If you
 444    are porting to a new ethercard, look at the packet driver source for hints.
 445    The NEx000 doesn't share the on-board packet memory -- you have to put
 446    the packet out through the "remote DMA" dataport using outb. */
 447
 448 static void
 449 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 450 {
 451     int nic_base = dev->base_addr;
 452     char *buf = skb->data;
 453     char *ptrc;
 454     short *ptrs;
 455     int cnt;
 456
 457     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 458     if (ei_status.dmaing) {
 459         printk("%s: DMAing conflict in ne_block_input "
 460            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 461            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 462         return;
 463     }
 464     ei_status.dmaing |= 0x01;
 465     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 466     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 467     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 468     outb(count >> 8, nic_base + NE_EN0_RCNTHI);
 469     outb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 470     outb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 471     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 472     if (ei_status.word16) {
 473       ptrs = (short*)buf;
 474       for (cnt = 0; cnt < (count>>1); cnt++)
 475         *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 476       if (count & 0x01) {
 477         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 478       }
 479     } else {
 480       ptrc = (char*)buf;
 481       for (cnt = 0; cnt < count; cnt++)
 482         *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 483     }
 484
 485     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 486     ei_status.dmaing &= ~0x01;
 487 }
 488
 489 static void
 490 apne_block_output(struct net_device *dev, int count,
 491                 const unsigned char *buf, const int start_page)
 492 {
 493     int nic_base = NE_BASE;
 494     unsigned long dma_start;
 495     char *ptrc;
 496     short *ptrs;
 497     int cnt;
 498
 499     /* Round the count up for word writes.  Do we need to do this?
 500        What effect will an odd byte count have on the 8390?
 501        I should check someday. */
 502     if (ei_status.word16 && (count & 0x01))
 503       count++;
 504
 505     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 506     if (ei_status.dmaing) {
 507         printk("%s: DMAing conflict in ne_block_output."
 508            "[DMAstat:%d][irqlock:%d][intr:%d]\n",
 509            dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
 510         return;
 511     }
 512     ei_status.dmaing |= 0x01;
 513     /* We should already be in page 0, but to be safe... */
 514     outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 515
 516     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 517
 518    /* Now the normal output. */
 519     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 520     outb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 521     outb(0x00, nic_base + NE_EN0_RSARLO);
 522     outb(start_page, nic_base + NE_EN0_RSARHI);
 523
 524     outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 525     if (ei_status.word16) {
 526         ptrs = (short*)buf;
 527         for (cnt = 0; cnt < count>>1; cnt++)
 528             outw(*ptrs++, NE_BASE+NE_DATAPORT);
 529     } else {
 530         ptrc = (char*)buf;
 531         for (cnt = 0; cnt < count; cnt++)
 532             outb(*ptrc++, NE_BASE + NE_DATAPORT);
 533     }
 534
 535     dma_start = jiffies;
 536
 537     while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 538         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 539                 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 540                 apne_reset_8390(dev);
 541                 NS8390_init(dev,1);
 542                 break;
 543         }
 544
 545     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 546     ei_status.dmaing &= ~0x01;
 547     return;
 548 }
 549
 550 static irqreturn_t apne_interrupt(int irq, void *dev_id)
 551 {
 552     unsigned char pcmcia_intreq;
 553
 554     if (!(gayle.inten & GAYLE_IRQ_IRQ))
 555         return IRQ_NONE;
 556
 557     pcmcia_intreq = pcmcia_get_intreq();
 558
 559     if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
 560         pcmcia_ack_int(pcmcia_intreq);
 561         return IRQ_NONE;
 562     }
 563     if (ei_debug > 3)
 564         printk("pcmcia intreq = %x\n", pcmcia_intreq);
 565     pcmcia_disable_irq();                       /* to get rid of the sti() within ei_interrupt */
 566     ei_interrupt(irq, dev_id);
 567     pcmcia_ack_int(pcmcia_get_intreq());
 568     pcmcia_enable_irq();
 569     return IRQ_HANDLED;
 570 }
 571
 572 #ifdef MODULE
 573 static struct net_device *apne_dev;
 574
 575 static int __init apne_module_init(void)
 576 {
 577         apne_dev = apne_probe(-1);
 578         if (IS_ERR(apne_dev))
 579                 return PTR_ERR(apne_dev);
 580         return 0;
 581 }
 582
 583 static void __exit apne_module_exit(void)
 584 {
 585         unregister_netdev(apne_dev);
 586
 587         pcmcia_disable_irq();
 588
 589         free_irq(IRQ_AMIGA_PORTS, apne_dev);
 590
 591         pcmcia_reset();
 592
 593         release_region(IOBASE, 0x20);
 594
 595         free_netdev(apne_dev);
 596 }
 597 module_init(apne_module_init);
 598 module_exit(apne_module_exit);
 599 #endif
 600
 601 static int init_pcmcia(void)
 602 {
 603         u_char config;
 604 #ifndef MANUAL_CONFIG
 605         u_char tuple[32];
 606         int offset_len;
 607 #endif
 608         u_long offset;
 609
 610         pcmcia_reset();
 611         pcmcia_program_voltage(PCMCIA_0V);
 612         pcmcia_access_speed(PCMCIA_SPEED_250NS);
 613         pcmcia_write_enable();
 614
 615 #ifdef MANUAL_CONFIG
 616         config = MANUAL_CONFIG;
 617 #else
 618         /* get and write config byte to enable IO port */
 619
 620         if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
 621                 return 0;
 622
 623         config = tuple[2] & 0x3f;
 624 #endif
 625 #ifdef MANUAL_OFFSET
 626         offset = MANUAL_OFFSET;
 627 #else
 628         if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
 629                 return 0;
 630
 631         offset_len = (tuple[2] & 0x3) + 1;
 632         offset = 0;
 633         while(offset_len--) {
 634                 offset = (offset << 8) | tuple[4+offset_len];
 635         }
 636 #endif
 637
 638         out_8(GAYLE_ATTRIBUTE+offset, config);
 639
 640         return 1;
 641 }
 642
 643 MODULE_LICENSE("GPL");