drivers/net/ethernet/8390/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/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 void apne_reset_8390(struct net_device *dev);
  82 static void apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
  83                           int ring_page);
  84 static void apne_block_input(struct net_device *dev, int count,
  85                                                                 struct sk_buff *skb, int ring_offset);
  86 static void apne_block_output(struct net_device *dev, const int count,
  87                                                         const unsigned char *buf, const int start_page);
  88 static irqreturn_t apne_interrupt(int irq, void *dev_id);
  89
  90 static int init_pcmcia(void);
  91
  92 /* IO base address used for nic */
  93
  94 #define IOBASE 0x300
  95
  96 /*
  97    use MANUAL_CONFIG and MANUAL_OFFSET for enabling IO by hand
  98    you can find the values to use by looking at the cnet.device
  99    config file example (the default values are for the CNET40BC card)
 100 */
 101
 102 /*
 103 #define MANUAL_CONFIG 0x20
 104 #define MANUAL_OFFSET 0x3f8
 105
 106 #define MANUAL_HWADDR0 0x00
 107 #define MANUAL_HWADDR1 0x12
 108 #define MANUAL_HWADDR2 0x34
 109 #define MANUAL_HWADDR3 0x56
 110 #define MANUAL_HWADDR4 0x78
 111 #define MANUAL_HWADDR5 0x9a
 112 */
 113
 114 static const char version[] =
 115     "apne.c:v1.1 7/10/98 Alain Malek (Alain.Malek@cryogen.ch)\n";
 116
 117 static int apne_owned;  /* signal if card already owned */
 118
 119 static u32 apne_msg_enable;
 120 module_param_named(msg_enable, apne_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
 121 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
 122
 123 struct net_device * __init apne_probe(int unit)
 124 {
 125         struct net_device *dev;
 126         struct ei_device *ei_local;
 127
 128 #ifndef MANUAL_CONFIG
 129         char tuple[8];
 130 #endif
 131         int err;
 132
 133         if (!MACH_IS_AMIGA)
 134                 return ERR_PTR(-ENODEV);
 135
 136         if (apne_owned)
 137                 return ERR_PTR(-ENODEV);
 138
 139         if ( !(AMIGAHW_PRESENT(PCMCIA)) )
 140                 return ERR_PTR(-ENODEV);
 141
 142         pr_info("Looking for PCMCIA ethernet card : ");
 143
 144         /* check if a card is inserted */
 145         if (!(PCMCIA_INSERTED)) {
 146                 pr_cont("NO PCMCIA card inserted\n");
 147                 return ERR_PTR(-ENODEV);
 148         }
 149
 150         dev = alloc_ei_netdev();
 151         if (!dev)
 152                 return ERR_PTR(-ENOMEM);
 153         if (unit >= 0) {
 154                 sprintf(dev->name, "eth%d", unit);
 155                 netdev_boot_setup_check(dev);
 156         }
 157         ei_local = netdev_priv(dev);
 158         ei_local->msg_enable = apne_msg_enable;
 159
 160         /* disable pcmcia irq for readtuple */
 161         pcmcia_disable_irq();
 162
 163 #ifndef MANUAL_CONFIG
 164         if ((pcmcia_copy_tuple(CISTPL_FUNCID, tuple, 8) < 3) ||
 165                 (tuple[2] != CISTPL_FUNCID_NETWORK)) {
 166                 pr_cont("not an ethernet card\n");
 167                 /* XXX: shouldn't we re-enable irq here? */
 168                 free_netdev(dev);
 169                 return ERR_PTR(-ENODEV);
 170         }
 171 #endif
 172
 173         pr_cont("ethernet PCMCIA card inserted\n");
 174
 175         if (!init_pcmcia()) {
 176                 /* XXX: shouldn't we re-enable irq here? */
 177                 free_netdev(dev);
 178                 return ERR_PTR(-ENODEV);
 179         }
 180
 181         if (!request_region(IOBASE, 0x20, DRV_NAME)) {
 182                 free_netdev(dev);
 183                 return ERR_PTR(-EBUSY);
 184         }
 185
 186         err = apne_probe1(dev, IOBASE);
 187         if (err) {
 188                 release_region(IOBASE, 0x20);
 189                 free_netdev(dev);
 190                 return ERR_PTR(err);
 191         }
 192         err = register_netdev(dev);
 193         if (!err)
 194                 return dev;
 195
 196         pcmcia_disable_irq();
 197         free_irq(IRQ_AMIGA_PORTS, dev);
 198         pcmcia_reset();
 199         release_region(IOBASE, 0x20);
 200         free_netdev(dev);
 201         return ERR_PTR(err);
 202 }
 203
 204 static int __init apne_probe1(struct net_device *dev, int ioaddr)
 205 {
 206     int i;
 207     unsigned char SA_prom[32];
 208     int wordlength = 2;
 209     const char *name = NULL;
 210     int start_page, stop_page;
 211 #ifndef MANUAL_HWADDR0
 212     int neX000, ctron;
 213 #endif
 214     static unsigned version_printed;
 215
 216     if ((apne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
 217                 netdev_info(dev, version);
 218
 219     netdev_info(dev, "PCMCIA NE*000 ethercard probe");
 220
 221     /* Reset card. Who knows what dain-bramaged state it was left in. */
 222     {   unsigned long reset_start_time = jiffies;
 223
 224         outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 225
 226         while ((inb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
 227                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 228                         pr_cont(" not found (no reset ack).\n");
 229                         return -ENODEV;
 230                 }
 231
 232         outb(0xff, ioaddr + NE_EN0_ISR);                /* Ack all intr. */
 233     }
 234
 235 #ifndef MANUAL_HWADDR0
 236
 237     /* Read the 16 bytes of station address PROM.
 238        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 239        We can't reliably read the SAPROM address without this.
 240        (I learned the hard way!). */
 241     {
 242         struct {unsigned long value, offset; } program_seq[] = {
 243             {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
 244             {0x48,      NE_EN0_DCFG},   /* Set byte-wide (0x48) access. */
 245             {0x00,      NE_EN0_RCNTLO}, /* Clear the count regs. */
 246             {0x00,      NE_EN0_RCNTHI},
 247             {0x00,      NE_EN0_IMR},    /* Mask completion irq. */
 248             {0xFF,      NE_EN0_ISR},
 249             {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20  Set to monitor */
 250             {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02  and loopback mode. */
 251             {32,        NE_EN0_RCNTLO},
 252             {0x00,      NE_EN0_RCNTHI},
 253             {0x00,      NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
 254             {0x00,      NE_EN0_RSARHI},
 255             {E8390_RREAD+E8390_START, NE_CMD},
 256         };
 257         for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
 258             outb(program_seq[i].value, ioaddr + program_seq[i].offset);
 259         }
 260
 261     }
 262     for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
 263         SA_prom[i] = inb(ioaddr + NE_DATAPORT);
 264         SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
 265         if (SA_prom[i] != SA_prom[i+1])
 266             wordlength = 1;
 267     }
 268
 269     /*  At this point, wordlength *only* tells us if the SA_prom is doubled
 270         up or not because some broken PCI cards don't respect the byte-wide
 271         request in program_seq above, and hence don't have doubled up values.
 272         These broken cards would otherwise be detected as an ne1000.  */
 273
 274     if (wordlength == 2)
 275         for (i = 0; i < 16; i++)
 276                 SA_prom[i] = SA_prom[i+i];
 277
 278     if (wordlength == 2) {
 279         /* We must set the 8390 for word mode. */
 280         outb(0x49, ioaddr + NE_EN0_DCFG);
 281         start_page = NESM_START_PG;
 282         stop_page = NESM_STOP_PG;
 283     } else {
 284         start_page = NE1SM_START_PG;
 285         stop_page = NE1SM_STOP_PG;
 286     }
 287
 288     neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
 289     ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
 290
 291     /* Set up the rest of the parameters. */
 292     if (neX000) {
 293         name = (wordlength == 2) ? "NE2000" : "NE1000";
 294     } else if (ctron) {
 295         name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
 296         start_page = 0x01;
 297         stop_page = (wordlength == 2) ? 0x40 : 0x20;
 298     } else {
 299         pr_cont(" not found.\n");
 300         return -ENXIO;
 301
 302     }
 303
 304 #else
 305     wordlength = 2;
 306     /* We must set the 8390 for word mode. */
 307     outb(0x49, ioaddr + NE_EN0_DCFG);
 308     start_page = NESM_START_PG;
 309     stop_page = NESM_STOP_PG;
 310
 311     SA_prom[0] = MANUAL_HWADDR0;
 312     SA_prom[1] = MANUAL_HWADDR1;
 313     SA_prom[2] = MANUAL_HWADDR2;
 314     SA_prom[3] = MANUAL_HWADDR3;
 315     SA_prom[4] = MANUAL_HWADDR4;
 316     SA_prom[5] = MANUAL_HWADDR5;
 317     name = "NE2000";
 318 #endif
 319
 320     dev->base_addr = ioaddr;
 321     dev->irq = IRQ_AMIGA_PORTS;
 322     dev->netdev_ops = &ei_netdev_ops;
 323
 324     /* Install the Interrupt handler */
 325     i = request_irq(dev->irq, apne_interrupt, IRQF_SHARED, DRV_NAME, dev);
 326     if (i) return i;
 327
 328     for (i = 0; i < ETH_ALEN; i++)
 329         dev->dev_addr[i] = SA_prom[i];
 330
 331     pr_cont(" %pM\n", dev->dev_addr);
 332
 333     netdev_info(dev, "%s found.\n", name);
 334
 335     ei_status.name = name;
 336     ei_status.tx_start_page = start_page;
 337     ei_status.stop_page = stop_page;
 338     ei_status.word16 = (wordlength == 2);
 339
 340     ei_status.rx_start_page = start_page + TX_PAGES;
 341
 342     ei_status.reset_8390 = &apne_reset_8390;
 343     ei_status.block_input = &apne_block_input;
 344     ei_status.block_output = &apne_block_output;
 345     ei_status.get_8390_hdr = &apne_get_8390_hdr;
 346
 347     NS8390_init(dev, 0);
 348
 349     pcmcia_ack_int(pcmcia_get_intreq());                /* ack PCMCIA int req */
 350     pcmcia_enable_irq();
 351
 352     apne_owned = 1;
 353
 354     return 0;
 355 }
 356
 357 /* Hard reset the card.  This used to pause for the same period that a
 358    8390 reset command required, but that shouldn't be necessary. */
 359 static void
 360 apne_reset_8390(struct net_device *dev)
 361 {
 362     unsigned long reset_start_time = jiffies;
 363     struct ei_device *ei_local = netdev_priv(dev);
 364
 365     init_pcmcia();
 366
 367     netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
 368
 369     outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 370
 371     ei_status.txing = 0;
 372     ei_status.dmaing = 0;
 373
 374     /* This check _should_not_ be necessary, omit eventually. */
 375     while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
 376         if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 377                 netdev_err(dev, "ne_reset_8390() did not complete.\n");
 378                 break;
 379         }
 380     outb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr. */
 381 }
 382
 383 /* Grab the 8390 specific header. Similar to the block_input routine, but
 384    we don't need to be concerned with ring wrap as the header will be at
 385    the start of a page, so we optimize accordingly. */
 386
 387 static void
 388 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 389 {
 390
 391     int nic_base = dev->base_addr;
 392     int cnt;
 393     char *ptrc;
 394     short *ptrs;
 395
 396     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 397     if (ei_status.dmaing) {
 398         netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
 399                    "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 400                    ei_status.dmaing, ei_status.irqlock, dev->irq);
 401         return;
 402     }
 403
 404     ei_status.dmaing |= 0x01;
 405     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 406     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 407     outb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
 408     outb(0, nic_base + NE_EN0_RCNTHI);
 409     outb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
 410     outb(ring_page, nic_base + NE_EN0_RSARHI);
 411     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 412
 413     if (ei_status.word16) {
 414         ptrs = (short*)hdr;
 415         for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
 416             *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 417     } else {
 418         ptrc = (char*)hdr;
 419         for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
 420             *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 421     }
 422
 423     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 424     ei_status.dmaing &= ~0x01;
 425
 426     le16_to_cpus(&hdr->count);
 427 }
 428
 429 /* Block input and output, similar to the Crynwr packet driver.  If you
 430    are porting to a new ethercard, look at the packet driver source for hints.
 431    The NEx000 doesn't share the on-board packet memory -- you have to put
 432    the packet out through the "remote DMA" dataport using outb. */
 433
 434 static void
 435 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 436 {
 437     int nic_base = dev->base_addr;
 438     char *buf = skb->data;
 439     char *ptrc;
 440     short *ptrs;
 441     int cnt;
 442
 443     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 444     if (ei_status.dmaing) {
 445                 netdev_err(dev, "DMAing conflict in ne_block_input "
 446                            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 447                            ei_status.dmaing, ei_status.irqlock, dev->irq);
 448         return;
 449     }
 450     ei_status.dmaing |= 0x01;
 451     outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 452     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 453     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 454     outb(count >> 8, nic_base + NE_EN0_RCNTHI);
 455     outb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
 456     outb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
 457     outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 458     if (ei_status.word16) {
 459       ptrs = (short*)buf;
 460       for (cnt = 0; cnt < (count>>1); cnt++)
 461         *ptrs++ = inw(NE_BASE + NE_DATAPORT);
 462       if (count & 0x01) {
 463         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 464       }
 465     } else {
 466       ptrc = buf;
 467       for (cnt = 0; cnt < count; cnt++)
 468         *ptrc++ = inb(NE_BASE + NE_DATAPORT);
 469     }
 470
 471     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 472     ei_status.dmaing &= ~0x01;
 473 }
 474
 475 static void
 476 apne_block_output(struct net_device *dev, int count,
 477                 const unsigned char *buf, const int start_page)
 478 {
 479     int nic_base = NE_BASE;
 480     unsigned long dma_start;
 481     char *ptrc;
 482     short *ptrs;
 483     int cnt;
 484
 485     /* Round the count up for word writes.  Do we need to do this?
 486        What effect will an odd byte count have on the 8390?
 487        I should check someday. */
 488     if (ei_status.word16 && (count & 0x01))
 489       count++;
 490
 491     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 492     if (ei_status.dmaing) {
 493                 netdev_err(dev, "DMAing conflict in ne_block_output."
 494                            "[DMAstat:%d][irqlock:%d][intr:%d]\n",
 495                            ei_status.dmaing, ei_status.irqlock, dev->irq);
 496         return;
 497     }
 498     ei_status.dmaing |= 0x01;
 499     /* We should already be in page 0, but to be safe... */
 500     outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 501
 502     outb(ENISR_RDC, nic_base + NE_EN0_ISR);
 503
 504    /* Now the normal output. */
 505     outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
 506     outb(count >> 8,   nic_base + NE_EN0_RCNTHI);
 507     outb(0x00, nic_base + NE_EN0_RSARLO);
 508     outb(start_page, nic_base + NE_EN0_RSARHI);
 509
 510     outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 511     if (ei_status.word16) {
 512         ptrs = (short*)buf;
 513         for (cnt = 0; cnt < count>>1; cnt++)
 514             outw(*ptrs++, NE_BASE+NE_DATAPORT);
 515     } else {
 516         ptrc = (char*)buf;
 517         for (cnt = 0; cnt < count; cnt++)
 518             outb(*ptrc++, NE_BASE + NE_DATAPORT);
 519     }
 520
 521     dma_start = jiffies;
 522
 523     while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
 524         if (time_after(jiffies, dma_start + 2*HZ/100)) {        /* 20ms */
 525                 netdev_warn(dev, "timeout waiting for Tx RDC.\n");
 526                 apne_reset_8390(dev);
 527                 NS8390_init(dev,1);
 528                 break;
 529         }
 530
 531     outb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr. */
 532     ei_status.dmaing &= ~0x01;
 533 }
 534
 535 static irqreturn_t apne_interrupt(int irq, void *dev_id)
 536 {
 537     unsigned char pcmcia_intreq;
 538
 539     if (!(gayle.inten & GAYLE_IRQ_IRQ))
 540         return IRQ_NONE;
 541
 542     pcmcia_intreq = pcmcia_get_intreq();
 543
 544     if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
 545         pcmcia_ack_int(pcmcia_intreq);
 546         return IRQ_NONE;
 547     }
 548     if (apne_msg_enable & NETIF_MSG_INTR)
 549         pr_debug("pcmcia intreq = %x\n", pcmcia_intreq);
 550     pcmcia_disable_irq();                       /* to get rid of the sti() within ei_interrupt */
 551     ei_interrupt(irq, dev_id);
 552     pcmcia_ack_int(pcmcia_get_intreq());
 553     pcmcia_enable_irq();
 554     return IRQ_HANDLED;
 555 }
 556
 557 #ifdef MODULE
 558 static struct net_device *apne_dev;
 559
 560 static int __init apne_module_init(void)
 561 {
 562         apne_dev = apne_probe(-1);
 563         return PTR_ERR_OR_ZERO(apne_dev);
 564 }
 565
 566 static void __exit apne_module_exit(void)
 567 {
 568         unregister_netdev(apne_dev);
 569
 570         pcmcia_disable_irq();
 571
 572         free_irq(IRQ_AMIGA_PORTS, apne_dev);
 573
 574         pcmcia_reset();
 575
 576         release_region(IOBASE, 0x20);
 577
 578         free_netdev(apne_dev);
 579 }
 580 module_init(apne_module_init);
 581 module_exit(apne_module_exit);
 582 #endif
 583
 584 static int init_pcmcia(void)
 585 {
 586         u_char config;
 587 #ifndef MANUAL_CONFIG
 588         u_char tuple[32];
 589         int offset_len;
 590 #endif
 591         u_long offset;
 592
 593         pcmcia_reset();
 594         pcmcia_program_voltage(PCMCIA_0V);
 595         pcmcia_access_speed(PCMCIA_SPEED_250NS);
 596         pcmcia_write_enable();
 597
 598 #ifdef MANUAL_CONFIG
 599         config = MANUAL_CONFIG;
 600 #else
 601         /* get and write config byte to enable IO port */
 602
 603         if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
 604                 return 0;
 605
 606         config = tuple[2] & 0x3f;
 607 #endif
 608 #ifdef MANUAL_OFFSET
 609         offset = MANUAL_OFFSET;
 610 #else
 611         if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
 612                 return 0;
 613
 614         offset_len = (tuple[2] & 0x3) + 1;
 615         offset = 0;
 616         while(offset_len--) {
 617                 offset = (offset << 8) | tuple[4+offset_len];
 618         }
 619 #endif
 620
 621         out_8(GAYLE_ATTRIBUTE+offset, config);
 622
 623         return 1;
 624 }
 625
 626 MODULE_LICENSE("GPL");