drivers/net/ne2.c

   1 /* ne2.c: A NE/2 Ethernet Driver for Linux. */
   2 /*
   3    Based on the NE2000 driver written by Donald Becker (1992-94).
   4    modified by Wim Dumon (Apr 1996)
   5
   6    This software may be used and distributed according to the terms
   7    of the GNU Public License, incorporated herein by reference.
   8
   9    The author may be reached as wimpie@linux.cc.kuleuven.ac.be
  10
  11    Currently supported: NE/2
  12    This patch was never tested on other MCA-ethernet adapters, but it
  13    might work. Just give it a try and let me know if you have problems.
  14    Also mail me if it really works, please!
  15
  16    Changelog:
  17    Mon Feb  3 16:26:02 MET 1997
  18    - adapted the driver to work with the 2.1.25 kernel
  19    - multiple ne2 support (untested)
  20    - module support (untested)
  21
  22    Fri Aug 28 00:18:36 CET 1998 (David Weinehall)
  23    - fixed a few minor typos
  24    - made the MODULE_PARM conditional (it only works with the v2.1.x kernels)
  25    - fixed the module support (Now it's working...)
  26
  27    Mon Sep  7 19:01:44 CET 1998 (David Weinehall)
  28    - added support for Arco Electronics AE/2-card (experimental)
  29
  30    Mon Sep 14 09:53:42 CET 1998 (David Weinehall)
  31    - added support for Compex ENET-16MC/P (experimental)
  32
  33    Tue Sep 15 16:21:12 CET 1998 (David Weinehall, Magnus Jonsson, Tomas Ogren)
  34    - Miscellaneous bugfixes
  35
  36    Tue Sep 19 16:21:12 CET 1998 (Magnus Jonsson)
  37    - Cleanup
  38
  39    Wed Sep 23 14:33:34 CET 1998 (David Weinehall)
  40    - Restructuring and rewriting for v2.1.x compliance
  41
  42    Wed Oct 14 17:19:21 CET 1998 (David Weinehall)
  43    - Added code that unregisters irq and proc-info
  44    - Version# bump
  45
  46    Mon Nov 16 15:28:23 CET 1998 (Wim Dumon)
  47    - pass 'dev' as last parameter of request_irq in stead of 'NULL'
  48
  49    *    WARNING
  50         -------
  51         This is alpha-test software.  It is not guaranteed to work. As a
  52         matter of fact, I'm quite sure there are *LOTS* of bugs in here. I
  53         would like to hear from you if you use this driver, even if it works.
  54         If it doesn't work, be sure to send me a mail with the problems !
  55 */
  56
  57 static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n";
  58
  59 #include <linux/module.h>
  60 #include <linux/version.h>
  61
  62 #include <linux/kernel.h>
  63 #include <linux/sched.h>
  64 #include <linux/types.h>
  65 #include <linux/fcntl.h>
  66 #include <linux/interrupt.h>
  67 #include <linux/ptrace.h>
  68 #include <linux/ioport.h>
  69 #include <linux/in.h>
  70 #include <linux/malloc.h>
  71 #include <linux/string.h>
  72 #include <asm/system.h>
  73 #include <asm/bitops.h>
  74 #include <asm/io.h>
  75 #include <asm/dma.h>
  76 #include <linux/errno.h>
  77 #include <linux/init.h>
  78 #include <linux/mca.h>
  79
  80 #include <linux/netdevice.h>
  81 #include <linux/etherdevice.h>
  82 #include <linux/skbuff.h>
  83 #include "8390.h"
  84
  85
  86
  87 /* Some defines that people can play with if so inclined. */
  88
  89 /* Do we perform extra sanity checks on stuff ? */
  90 /* #define NE_SANITY_CHECK */
  91
  92 /* Do we implement the read before write bugfix ? */
  93 /* #define NE_RW_BUGFIX */
  94
  95 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
  96 /* #define PACKETBUF_MEMSIZE    0x40 */
  97
  98
  99 /* ---- No user-serviceable parts below ---- */
 100
 101 #define NE_BASE  (dev->base_addr)
 102 #define NE_CMD          0x00
 103 #define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
 104 #define NE_RESET        0x20    /* Issue a read to reset, a write to clear. */
 105 #define NE_IO_EXTENT    0x30
 106
 107 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
 108 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
 109 #define NESM_START_PG   0x40    /* First page of TX buffer */
 110 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
 111
 112 /* From the .ADF file: */
 113 static unsigned int addresses[7] __initdata =
 114                 {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
 115 static int irqs[4] __initdata = {3, 4, 5, 9};
 116
 117 struct ne2_adapters_t {
 118         unsigned int    id;
 119         char            *name;
 120 };
 121
 122 static struct ne2_adapters_t ne2_adapters[] __initdata = {
 123         { 0x6354, "Arco Ethernet Adapter AE/2" },
 124         { 0x70DE, "Compex ENET-16 MC/P" },
 125         { 0x7154, "Novell Ethernet Adapter NE/2" },
 126         { 0x0000, NULL }
 127 };
 128
 129 extern int netcard_probe(struct net_device *dev);
 130
 131 static int ne2_probe1(struct net_device *dev, int slot);
 132
 133 static int ne_open(struct net_device *dev);
 134 static int ne_close(struct net_device *dev);
 135
 136 static void ne_reset_8390(struct net_device *dev);
 137 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
 138                 int ring_page);
 139 static void ne_block_input(struct net_device *dev, int count,
 140                 struct sk_buff *skb, int ring_offset);
 141 static void ne_block_output(struct net_device *dev, const int count,
 142                 const unsigned char *buf, const int start_page);
 143
 144
 145 /*
 146  * Note that at boot, this probe only picks up one card at a time.
 147  */
 148
 149 int __init ne2_probe(struct net_device *dev)
 150 {
 151         static int current_mca_slot = -1;
 152         int i;
 153         int adapter_found = 0;
 154
 155         SET_MODULE_OWNER(dev);
 156
 157         /* Do not check any supplied i/o locations.
 158            POS registers usually don't fail :) */
 159
 160         /* MCA cards have POS registers.
 161            Autodetecting MCA cards is extremely simple.
 162            Just search for the card. */
 163
 164         for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
 165                 current_mca_slot =
 166                         mca_find_unused_adapter(ne2_adapters[i].id, 0);
 167
 168                 if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
 169                         mca_set_adapter_name(current_mca_slot,
 170                                         ne2_adapters[i].name);
 171                         mca_mark_as_used(current_mca_slot);
 172
 173                         return ne2_probe1(dev, current_mca_slot);
 174                 }
 175         }
 176         return -ENODEV;
 177 }
 178
 179
 180 static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
 181 {
 182         int len=0;
 183
 184         len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
 185         len += sprintf(buf+len, "Driver written by Wim Dumon ");
 186         len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
 187         len += sprintf(buf+len, "Modified by ");
 188         len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
 189         len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
 190         len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
 191         len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
 192         len += sprintf(buf+len, "IRQ    : %d\n", dev->irq);
 193
 194 #define HW_ADDR(i) dev->dev_addr[i]
 195         len += sprintf(buf+len, "HW addr : %x:%x:%x:%x:%x:%x\n",
 196                         HW_ADDR(0), HW_ADDR(1), HW_ADDR(2),
 197                         HW_ADDR(3), HW_ADDR(4), HW_ADDR(5) );
 198 #undef HW_ADDR
 199
 200         return len;
 201 }
 202
 203 static int __init ne2_probe1(struct net_device *dev, int slot)
 204 {
 205         int i, base_addr, irq, retval;
 206         unsigned char POS;
 207         unsigned char SA_prom[32];
 208         const char *name = "NE/2";
 209         int start_page, stop_page;
 210         static unsigned version_printed;
 211
 212         if (ei_debug && version_printed++ == 0)
 213                 printk(version);
 214
 215         printk("NE/2 ethercard found in slot %d:", slot);
 216
 217         /* Read base IO and IRQ from the POS-registers */
 218         POS = mca_read_stored_pos(slot, 2);
 219         if(!(POS % 2)) {
 220                 printk(" disabled.\n");
 221                 return -ENODEV;
 222         }
 223
 224         i = (POS & 0xE)>>1;
 225         /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
 226            " en zou het moeten werken -> %d\n", i);
 227            The above line was for remote testing, thanx to sdog ... */
 228         base_addr = addresses[i - 1];
 229         irq = irqs[(POS & 0x60)>>5];
 230
 231         if (!request_region(base_addr, NE_IO_EXTENT, dev->name))
 232                 return -EBUSY;
 233
 234 #ifdef DEBUG
 235         printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
 236                         base_addr, irq);
 237 #endif
 238
 239 #ifndef CRYNWR_WAY
 240         /* Reset the card the way they do it in the Crynwr packet driver */
 241         for (i=0; i<8; i++)
 242                 outb(0x0, base_addr + NE_RESET);
 243         inb(base_addr + NE_RESET);
 244         outb(0x21, base_addr + NE_CMD);
 245         if (inb(base_addr + NE_CMD) != 0x21) {
 246                 printk("NE/2 adapter not responding\n");
 247                 retval = -ENODEV;
 248                 goto out;
 249         }
 250
 251         /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
 252            my RAM is okay.  Suppose your memory is broken.  Then this test
 253            should fail and you won't be able to use your card.  But if I do not
 254            test, you won't be able to use your card, neither.  So this test
 255            won't help you. */
 256
 257 #else  /* _I_ never tested it this way .. Go ahead and try ...*/
 258         /* Reset card. Who knows what dain-bramaged state it was left in. */
 259         {
 260                 unsigned long reset_start_time = jiffies;
 261
 262                 /* DON'T change these to inb_p/outb_p or reset will fail on
 263                    clones.. */
 264                 outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
 265
 266                 while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
 267                         if (jiffies - reset_start_time > 2*HZ/100) {
 268                                 printk(" not found (no reset ack).\n");
 269                                 retval = -ENODEV;
 270                                 goto out;
 271                         }
 272
 273                 outb_p(0xff, base_addr + EN0_ISR);         /* Ack all intr. */
 274         }
 275 #endif
 276
 277
 278         /* Read the 16 bytes of station address PROM.
 279            We must first initialize registers, similar to
 280            NS8390_init(eifdev, 0).
 281            We can't reliably read the SAPROM address without this.
 282            (I learned the hard way!). */
 283         {
 284                 struct {
 285                         unsigned char value, offset;
 286                 } program_seq[] = {
 287                                                 /* Select page 0 */
 288                         {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
 289                         {0x49,  EN0_DCFG},  /* Set WORD-wide (0x49) access. */
 290                         {0x00,  EN0_RCNTLO},  /* Clear the count regs. */
 291                         {0x00,  EN0_RCNTHI},
 292                         {0x00,  EN0_IMR},  /* Mask completion irq. */
 293                         {0xFF,  EN0_ISR},
 294                         {E8390_RXOFF, EN0_RXCR},  /* 0x20  Set to monitor */
 295                         {E8390_TXOFF, EN0_TXCR},  /* 0x02  and loopback mode. */
 296                         {32,    EN0_RCNTLO},
 297                         {0x00,  EN0_RCNTHI},
 298                         {0x00,  EN0_RSARLO},  /* DMA starting at 0x0000. */
 299                         {0x00,  EN0_RSARHI},
 300                         {E8390_RREAD+E8390_START, E8390_CMD},
 301                 };
 302
 303                 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
 304                         outb_p(program_seq[i].value, base_addr +
 305                                 program_seq[i].offset);
 306
 307         }
 308         for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
 309                 SA_prom[i] = inb(base_addr + NE_DATAPORT);
 310         }
 311
 312         start_page = NESM_START_PG;
 313         stop_page = NESM_STOP_PG;
 314
 315         dev->irq=irq;
 316
 317         /* Snarf the interrupt now.  There's no point in waiting since we cannot
 318            share and the board will usually be enabled. */
 319         retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
 320         if (retval) {
 321                 printk (" unable to get IRQ %d (irqval=%d).\n",
 322                                 dev->irq, retval);
 323                 goto out;
 324         }
 325
 326         dev->base_addr = base_addr;
 327
 328         /* Allocate dev->priv and fill in 8390 specific dev fields. */
 329         if (ethdev_init(dev)) {
 330                 printk (" unable to get memory for dev->priv.\n");
 331                 free_irq(dev->irq, dev);
 332                 retval = -ENOMEM;
 333                 goto out;
 334         }
 335
 336         for(i = 0; i < ETHER_ADDR_LEN; i++) {
 337                 printk(" %2.2x", SA_prom[i]);
 338                 dev->dev_addr[i] = SA_prom[i];
 339         }
 340
 341         printk("\n%s: %s found at %#x, using IRQ %d.\n",
 342                         dev->name, name, base_addr, dev->irq);
 343
 344         mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
 345
 346         ei_status.name = name;
 347         ei_status.tx_start_page = start_page;
 348         ei_status.stop_page = stop_page;
 349         ei_status.word16 = (2 == 2);
 350
 351         ei_status.rx_start_page = start_page + TX_PAGES;
 352 #ifdef PACKETBUF_MEMSIZE
 353         /* Allow the packet buffer size to be overridden by know-it-alls. */
 354         ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
 355 #endif
 356
 357         ei_status.reset_8390 = &ne_reset_8390;
 358         ei_status.block_input = &ne_block_input;
 359         ei_status.block_output = &ne_block_output;
 360         ei_status.get_8390_hdr = &ne_get_8390_hdr;
 361
 362         ei_status.priv = slot;
 363
 364         dev->open = &ne_open;
 365         dev->stop = &ne_close;
 366         NS8390_init(dev, 0);
 367         return 0;
 368 out:
 369         release_region(base_addr, NE_IO_EXTENT);
 370         return retval;
 371 }
 372
 373 static int ne_open(struct net_device *dev)
 374 {
 375         ei_open(dev);
 376         return 0;
 377 }
 378
 379 static int ne_close(struct net_device *dev)
 380 {
 381         if (ei_debug > 1)
 382                 printk("%s: Shutting down ethercard.\n", dev->name);
 383         ei_close(dev);
 384         return 0;
 385 }
 386
 387 /* Hard reset the card.  This used to pause for the same period that a
 388    8390 reset command required, but that shouldn't be necessary. */
 389 static void ne_reset_8390(struct net_device *dev)
 390 {
 391         unsigned long reset_start_time = jiffies;
 392
 393         if (ei_debug > 1)
 394                 printk("resetting the 8390 t=%ld...", jiffies);
 395
 396         /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 397         outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 398
 399         ei_status.txing = 0;
 400         ei_status.dmaing = 0;
 401
 402         /* This check _should_not_ be necessary, omit eventually. */
 403         while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
 404                 if (jiffies - reset_start_time > 2*HZ/100) {
 405                         printk("%s: ne_reset_8390() did not complete.\n",
 406                                         dev->name);
 407                         break;
 408                 }
 409         outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
 410 }
 411
 412 /* Grab the 8390 specific header. Similar to the block_input routine, but
 413    we don't need to be concerned with ring wrap as the header will be at
 414    the start of a page, so we optimize accordingly. */
 415
 416 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
 417                 int ring_page)
 418 {
 419
 420         int nic_base = dev->base_addr;
 421
 422         /* This *shouldn't* happen.
 423            If it does, it's the last thing you'll see */
 424         if (ei_status.dmaing) {
 425                 printk("%s: DMAing conflict in ne_get_8390_hdr "
 426                                 "[DMAstat:%d][irqlock:%d].\n",
 427                                 dev->name, ei_status.dmaing, ei_status.irqlock);
 428                 return;
 429         }
 430
 431         ei_status.dmaing |= 0x01;
 432         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 433         outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 434         outb_p(0, nic_base + EN0_RCNTHI);
 435         outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
 436         outb_p(ring_page, nic_base + EN0_RSARHI);
 437         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 438
 439         if (ei_status.word16)
 440                 insw(NE_BASE + NE_DATAPORT, hdr,
 441                                 sizeof(struct e8390_pkt_hdr)>>1);
 442         else
 443                 insb(NE_BASE + NE_DATAPORT, hdr,
 444                                 sizeof(struct e8390_pkt_hdr));
 445
 446         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 447         ei_status.dmaing &= ~0x01;
 448 }
 449
 450 /* Block input and output, similar to the Crynwr packet driver.  If you
 451    are porting to a new ethercard, look at the packet driver source for
 452    hints. The NEx000 doesn't share the on-board packet memory -- you have
 453    to put the packet out through the "remote DMA" dataport using outb. */
 454
 455 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
 456                 int ring_offset)
 457 {
 458 #ifdef NE_SANITY_CHECK
 459         int xfer_count = count;
 460 #endif
 461         int nic_base = dev->base_addr;
 462         char *buf = skb->data;
 463
 464         /* This *shouldn't* happen.
 465            If it does, it's the last thing you'll see */
 466         if (ei_status.dmaing) {
 467                 printk("%s: DMAing conflict in ne_block_input "
 468                                 "[DMAstat:%d][irqlock:%d].\n",
 469                                 dev->name, ei_status.dmaing, ei_status.irqlock);
 470                 return;
 471         }
 472         ei_status.dmaing |= 0x01;
 473         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 474         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 475         outb_p(count >> 8, nic_base + EN0_RCNTHI);
 476         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 477         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 478         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 479         if (ei_status.word16) {
 480                 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
 481                 if (count & 0x01) {
 482                         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 483 #ifdef NE_SANITY_CHECK
 484                         xfer_count++;
 485 #endif
 486                 }
 487         } else {
 488                 insb(NE_BASE + NE_DATAPORT, buf, count);
 489         }
 490
 491 #ifdef NE_SANITY_CHECK
 492         /* This was for the ALPHA version only, but enough people have
 493            been encountering problems so it is still here.  If you see
 494            this message you either 1) have a slightly incompatible clone
 495            or 2) have noise/speed problems with your bus. */
 496         if (ei_debug > 1) {     /* DMA termination address check... */
 497                 int addr, tries = 20;
 498                 do {
 499                         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
 500                            -- it's broken for Rx on some cards! */
 501                         int high = inb_p(nic_base + EN0_RSARHI);
 502                         int low = inb_p(nic_base + EN0_RSARLO);
 503                         addr = (high << 8) + low;
 504                         if (((ring_offset + xfer_count) & 0xff) == low)
 505                                 break;
 506                 } while (--tries > 0);
 507                 if (tries <= 0)
 508                         printk("%s: RX transfer address mismatch,"
 509                                 "%#4.4x (expected) vs. %#4.4x (actual).\n",
 510                                 dev->name, ring_offset + xfer_count, addr);
 511         }
 512 #endif
 513         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 514         ei_status.dmaing &= ~0x01;
 515 }
 516
 517 static void ne_block_output(struct net_device *dev, int count,
 518                 const unsigned char *buf, const int start_page)
 519 {
 520         int nic_base = NE_BASE;
 521         unsigned long dma_start;
 522 #ifdef NE_SANITY_CHECK
 523         int retries = 0;
 524 #endif
 525
 526         /* Round the count up for word writes. Do we need to do this?
 527            What effect will an odd byte count have on the 8390?
 528            I should check someday. */
 529         if (ei_status.word16 && (count & 0x01))
 530                 count++;
 531
 532         /* This *shouldn't* happen.
 533            If it does, it's the last thing you'll see */
 534         if (ei_status.dmaing) {
 535                 printk("%s: DMAing conflict in ne_block_output."
 536                                 "[DMAstat:%d][irqlock:%d]\n",
 537                                 dev->name, ei_status.dmaing, ei_status.irqlock);
 538                 return;
 539         }
 540         ei_status.dmaing |= 0x01;
 541         /* We should already be in page 0, but to be safe... */
 542         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 543
 544 #ifdef NE_SANITY_CHECK
 545 retry:
 546 #endif
 547
 548 #ifdef NE8390_RW_BUGFIX
 549         /* Handle the read-before-write bug the same way as the
 550            Crynwr packet driver -- the NatSemi method doesn't work.
 551            Actually this doesn't always work either, but if you have
 552            problems with your NEx000 this is better than nothing! */
 553         outb_p(0x42, nic_base + EN0_RCNTLO);
 554         outb_p(0x00, nic_base + EN0_RCNTHI);
 555         outb_p(0x42, nic_base + EN0_RSARLO);
 556         outb_p(0x00, nic_base + EN0_RSARHI);
 557         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 558         /* Make certain that the dummy read has occurred. */
 559         SLOW_DOWN_IO;
 560         SLOW_DOWN_IO;
 561         SLOW_DOWN_IO;
 562 #endif
 563
 564         outb_p(ENISR_RDC, nic_base + EN0_ISR);
 565
 566         /* Now the normal output. */
 567         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 568         outb_p(count >> 8,   nic_base + EN0_RCNTHI);
 569         outb_p(0x00, nic_base + EN0_RSARLO);
 570         outb_p(start_page, nic_base + EN0_RSARHI);
 571
 572         outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 573         if (ei_status.word16) {
 574                 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
 575         } else {
 576                 outsb(NE_BASE + NE_DATAPORT, buf, count);
 577         }
 578
 579         dma_start = jiffies;
 580
 581 #ifdef NE_SANITY_CHECK
 582         /* This was for the ALPHA version only, but enough people have
 583            been encountering problems so it is still here. */
 584
 585         if (ei_debug > 1) {             /* DMA termination address check... */
 586                 int addr, tries = 20;
 587                 do {
 588                         int high = inb_p(nic_base + EN0_RSARHI);
 589                         int low = inb_p(nic_base + EN0_RSARLO);
 590                         addr = (high << 8) + low;
 591                         if ((start_page << 8) + count == addr)
 592                                 break;
 593                 } while (--tries > 0);
 594                 if (tries <= 0) {
 595                         printk("%s: Tx packet transfer address mismatch,"
 596                                         "%#4.4x (expected) vs. %#4.4x (actual).\n",
 597                                         dev->name, (start_page << 8) + count, addr);
 598                         if (retries++ == 0)
 599                                 goto retry;
 600                 }
 601         }
 602 #endif
 603
 604         while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
 605                 if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
 606                         printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 607                         ne_reset_8390(dev);
 608                         NS8390_init(dev,1);
 609                         break;
 610                 }
 611
 612         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 613         ei_status.dmaing &= ~0x01;
 614         return;
 615 }
 616
 617
 618 #ifdef MODULE
 619 #define MAX_NE_CARDS    4       /* Max number of NE cards per module */
 620 static struct net_device dev_ne[MAX_NE_CARDS];
 621 static int io[MAX_NE_CARDS];
 622 static int irq[MAX_NE_CARDS];
 623 static int bad[MAX_NE_CARDS];   /* 0xbad = bad sig or no reset ack */
 624
 625 #ifdef MODULE_PARM
 626 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
 627 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
 628 MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
 629 #endif
 630
 631 /* Module code fixed by David Weinehall */
 632
 633 int init_module(void)
 634 {
 635         int this_dev, found = 0;
 636
 637         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 638                 struct net_device *dev = &dev_ne[this_dev];
 639                 dev->irq = irq[this_dev];
 640                 dev->mem_end = bad[this_dev];
 641                 dev->base_addr = io[this_dev];
 642                 dev->init = ne2_probe;
 643                 if (register_netdev(dev) != 0) {
 644                         if (found != 0) return 0;   /* Got at least one. */
 645
 646                         printk(KERN_WARNING "ne2.c: No NE/2 card found.\n");
 647                         return -ENXIO;
 648                 }
 649                 found++;
 650         }
 651         return 0;
 652 }
 653
 654 void cleanup_module(void)
 655 {
 656         int this_dev;
 657
 658         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 659                 struct net_device *dev = &dev_ne[this_dev];
 660                 if (dev->priv != NULL) {
 661                         mca_mark_as_unused(ei_status.priv);
 662                         mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
 663                         kfree(dev->priv);
 664                         free_irq(dev->irq, dev);
 665                         release_region(dev->base_addr, NE_IO_EXTENT);
 666                         unregister_netdev(dev);
 667                 }
 668         }
 669 }
 670 #endif /* MODULE */
 671
 672 /*
 673  * Local variables:
 674  *  compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne2.c"
 675  *  version-control: t
 676  *  kept-new-versions: 5
 677  * End:
 678  */