drivers/net/ne.c

/* */
This source file includes following definitions.
ne_probe
ne_probe1
ne_reset_8390
ne_get_8390_hdr
ne_block_input
ne_block_output
init_module
cleanup_module
   1 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
   2 /*
   3     Written 1992-94 by Donald Becker.
   4 
   5     Copyright 1993 United States Government as represented by the
   6     Director, National Security Agency.
   7 
   8     This software may be used and distributed according to the terms
   9     of the GNU Public License, incorporated herein by reference.
  10 
  11     The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
  12     Center of Excellence in Space Data and Information Sciences
  13         Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
  14 
  15     This driver should work with many programmed-I/O 8390-based ethernet
  16     boards.  Currently it supports the NE1000, NE2000, many clones,
  17     and some Cabletron products.
  18 
  19     Changelog:
  20 
  21     Paul Gortmaker      : use ENISR_RDC to monitor Tx PIO uploads, made
  22                           sanity checks and bad clone support optional.
  23     Paul Gortmaker      : new reset code, reset card after probe at boot.
  24 
  25 */
  26 
  27 /* Routines for the NatSemi-based designs (NE[12]000). */
  28 
  29 static const char *version =
  30     "ne.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  31 
  32 
  33 #ifdef MODULE
  34 #include <linux/module.h>
  35 #include <linux/version.h>
  36 #endif
  37 
  38 #include <linux/kernel.h>
  39 #include <linux/sched.h>
  40 #include <linux/errno.h>
  41 #include <asm/system.h>
  42 #include <asm/io.h>
  43 
  44 #include <linux/netdevice.h>
  45 #include <linux/etherdevice.h>
  46 #include "8390.h"
  47 
  48 /* Some defines that people can play with if so inclined. */
  49 
  50 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
  51 #define CONFIG_NE_BAD_CLONES
  52 
  53 /* Do we perform extra sanity checks on stuff ? */
  54 /* #define CONFIG_NE_SANITY */
  55 
  56 /* Do we implement the read before write bugfix ? */
  57 /* #define CONFIG_NE_RW_BUGFIX */
  58 
  59 /* ---- No user-serviceable parts below ---- */
  60 
  61 /* A zero-terminated list of I/O addresses to be probed. */
  62 static unsigned int netcard_portlist[] =
  63 { 0x300, 0x280, 0x320, 0x340, 0x360, 0};
  64 
  65 #ifdef CONFIG_NE_BAD_CLONES
  66 /* A list of bad clones that we none-the-less recognize. */
  67 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
  68 bad_clone_list[] = {
  69     {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
  70     {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
  71     {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
  72     {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
  73     {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
  74     {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
  75     {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
  76     {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
  77     {0,}
  78 };
  79 #endif
  80 
  81 #define NE_BASE  (dev->base_addr)
  82 #define NE_CMD          0x00
  83 #define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
  84 #define NE_RESET        0x1f    /* Issue a read to reset, a write to clear. */
  85 #define NE_IO_EXTENT    0x20
  86 
  87 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
  88 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
  89 #define NESM_START_PG   0x40    /* First page of TX buffer */
  90 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
  91 
  92 int ne_probe(struct device *dev);
  93 static int ne_probe1(struct device *dev, int ioaddr);
  94 
  95 static void ne_reset_8390(struct device *dev);
  96 static void ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
  97                           int ring_page);
  98 static void ne_block_input(struct device *dev, int count,
  99                           struct sk_buff *skb, int ring_offset);
 100 static void ne_block_output(struct device *dev, const int count,
 101                 const unsigned char *buf, const int start_page);
 102 
 103 
 104 /*  Probe for various non-shared-memory ethercards.
 105 
 106    NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
 107    buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
 108    the SAPROM, while other supposed NE2000 clones must be detected by their
 109    SA prefix.
 110 
 111    Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
 112    mode results in doubled values, which can be detected and compensated for.
 113 
 114    The probe is also responsible for initializing the card and filling
 115    in the 'dev' and 'ei_status' structures.
 116 
 117    We use the minimum memory size for some ethercard product lines, iff we can't
 118    distinguish models.  You can increase the packet buffer size by setting
 119    PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
 120         E1010   starts at 0x100 and ends at 0x2000.
 121         E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
 122         E2010    starts at 0x100 and ends at 0x4000.
 123         E2010-x starts at 0x100 and ends at 0xffff.  */
 124 
 125 #ifdef HAVE_DEVLIST
 126 struct netdev_entry netcard_drv =
 127 {"ne", ne_probe1, NE_IO_EXTENT, netcard_portlist};
 128 #else
 129 
 130 int ne_probe(struct device *dev)
     /*  */
 131 {
 132     int i;
 133     int base_addr = dev ? dev->base_addr : 0;
 134 
 135     if (base_addr > 0x1ff)      /* Check a single specified location. */
 136         return ne_probe1(dev, base_addr);
 137     else if (base_addr != 0)    /* Don't probe at all. */
 138         return ENXIO;
 139 
 140     for (i = 0; netcard_portlist[i]; i++) {
 141         int ioaddr = netcard_portlist[i];
 142         if (check_region(ioaddr, NE_IO_EXTENT))
 143             continue;
 144         if (ne_probe1(dev, ioaddr) == 0)
 145             return 0;
 146     }
 147 
 148     return ENODEV;
 149 }
 150 #endif
 151 
 152 static int ne_probe1(struct device *dev, int ioaddr)
     /*  */
 153 {
 154     int i;
 155     unsigned char SA_prom[32];
 156     int wordlength = 2;
 157     const char *name = NULL;
 158     int start_page, stop_page;
 159     int neX000, ctron;
 160     int reg0 = inb_p(ioaddr);
 161 
 162     if (reg0 == 0xFF)
 163         return ENODEV;
 164 
 165     /* Do a preliminary verification that we have a 8390. */
 166     {   int regd;
 167         outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
 168         regd = inb_p(ioaddr + 0x0d);
 169         outb_p(0xff, ioaddr + 0x0d);
 170         outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
 171         inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
 172         if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
 173             outb_p(reg0, ioaddr);
 174             outb_p(regd, ioaddr + 0x0d);        /* Restore the old values. */
 175             return ENODEV;
 176         }
 177     }
 178 
 179     printk("NE*000 ethercard probe at %#3x:", ioaddr);
 180 
 181     /* Reset card. Who knows what dain-bramaged state it was left in. */
 182     {   unsigned long reset_start_time = jiffies;
 183 
 184         /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 185         outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
 186 
 187         while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
 188                 if (jiffies - reset_start_time > 2*HZ/100) {
 189                         printk(" not found (no reset ack).\n");
 190                         return ENODEV;
 191                 }
 192 
 193         outb_p(0xff, ioaddr + EN0_ISR);         /* Ack all intr. */
 194     }
 195 
 196     /* Read the 16 bytes of station address PROM.
 197        We must first initialize registers, similar to NS8390_init(eifdev, 0).
 198        We can't reliably read the SAPROM address without this.
 199        (I learned the hard way!). */
 200     {
 201         struct {unsigned char value, offset; } program_seq[] = {
 202             {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
 203             {0x48,      EN0_DCFG},      /* Set byte-wide (0x48) access. */
 204             {0x00,      EN0_RCNTLO},    /* Clear the count regs. */
 205             {0x00,      EN0_RCNTHI},
 206             {0x00,      EN0_IMR},       /* Mask completion irq. */
 207             {0xFF,      EN0_ISR},
 208             {E8390_RXOFF, EN0_RXCR},    /* 0x20  Set to monitor */
 209             {E8390_TXOFF, EN0_TXCR},    /* 0x02  and loopback mode. */
 210             {32,        EN0_RCNTLO},
 211             {0x00,      EN0_RCNTHI},
 212             {0x00,      EN0_RSARLO},    /* DMA starting at 0x0000. */
 213             {0x00,      EN0_RSARHI},
 214             {E8390_RREAD+E8390_START, E8390_CMD},
 215         };
 216         for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
 217             outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
 218 
 219     }
 220     for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
 221         SA_prom[i] = inb(ioaddr + NE_DATAPORT);
 222         SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
 223         if (SA_prom[i] != SA_prom[i+1])
 224             wordlength = 1;
 225     }
 226 
 227     if (wordlength == 2) {
 228         /* We must set the 8390 for word mode. */
 229         outb_p(0x49, ioaddr + EN0_DCFG);
 230         /* We used to reset the ethercard here, but it doesn't seem
 231            to be necessary. */
 232         /* Un-double the SA_prom values. */
 233         for (i = 0; i < 16; i++)
 234             SA_prom[i] = SA_prom[i+i];
 235         start_page = NESM_START_PG;
 236         stop_page = NESM_STOP_PG;
 237     } else {
 238         start_page = NE1SM_START_PG;
 239         stop_page = NE1SM_STOP_PG;
 240     }
 241 
 242     for(i = 0; i < ETHER_ADDR_LEN; i++) {
 243         dev->dev_addr[i] = SA_prom[i];
 244         printk(" %2.2x", SA_prom[i]);
 245     }
 246 
 247     neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
 248     ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
 249 
 250     /* Set up the rest of the parameters. */
 251     if (neX000) {
 252         name = (wordlength == 2) ? "NE2000" : "NE1000";
 253     } else if (ctron) {
 254         name = "Cabletron";
 255         start_page = 0x01;
 256         stop_page = (wordlength == 2) ? 0x40 : 0x20;
 257     } else {
 258 #ifdef CONFIG_NE_BAD_CLONES
 259         /* Ack!  Well, there might be a *bad* NE*000 clone there.
 260            Check for total bogus addresses. */
 261         for (i = 0; bad_clone_list[i].name8; i++) {
 262             if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
 263                 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
 264                 SA_prom[2] == bad_clone_list[i].SAprefix[2]) {
 265                 if (wordlength == 2) {
 266                     name = bad_clone_list[i].name16;
 267                 } else {
 268                     name = bad_clone_list[i].name8;
 269                 }
 270                 break;
 271             }
 272         }
 273         if (bad_clone_list[i].name8 == NULL) {
 274             printk(" not found (invalid signature %2.2x %2.2x).\n",
 275                    SA_prom[14], SA_prom[15]);
 276             return ENXIO;
 277         }
 278 #else
 279         printk(" not found.\n");
 280         return ENXIO;
 281 #endif
 282 
 283     }
 284 
 285 
 286     if (dev == NULL)
 287         dev = init_etherdev(0, sizeof(struct ei_device));
 288 
 289     if (dev->irq < 2) {
 290         autoirq_setup(0);
 291         outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
 292         outb_p(0x00, ioaddr + EN0_RCNTLO);
 293         outb_p(0x00, ioaddr + EN0_RCNTHI);
 294         outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
 295         outb_p(0x00, ioaddr + EN0_IMR);                 /* Mask it again. */
 296         dev->irq = autoirq_report(0);
 297         if (ei_debug > 2)
 298             printk(" autoirq is %d\n", dev->irq);
 299     } else if (dev->irq == 2)
 300         /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
 301            or don't know which one to set. */
 302         dev->irq = 9;
 303     
 304     /* Snarf the interrupt now.  There's no point in waiting since we cannot
 305        share and the board will usually be enabled. */
 306     {
 307         int irqval = request_irq (dev->irq, ei_interrupt, 0, wordlength==2 ? "ne2000":"ne1000");
 308         if (irqval) {
 309             printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval);
 310             return EAGAIN;
 311         }
 312     }
 313 
 314     dev->base_addr = ioaddr;
 315 
 316     request_region(ioaddr, NE_IO_EXTENT, wordlength==2 ? "ne2000":"ne1000");
 317 
 318     for(i = 0; i < ETHER_ADDR_LEN; i++)
 319         dev->dev_addr[i] = SA_prom[i];
 320 
 321     ethdev_init(dev);
 322     printk("\n%s: %s found at %#x, using IRQ %d.\n",
 323            dev->name, name, ioaddr, dev->irq);
 324 
 325     if (ei_debug > 0)
 326         printk(version);
 327 
 328     ei_status.name = name;
 329     ei_status.tx_start_page = start_page;
 330     ei_status.stop_page = stop_page;
 331     ei_status.word16 = (wordlength == 2);
 332 
 333     ei_status.rx_start_page = start_page + TX_PAGES;
 334 #ifdef PACKETBUF_MEMSIZE
 335     /* Allow the packet buffer size to be overridden by know-it-alls. */
 336     ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
 337 #endif
 338 
 339     ei_status.reset_8390 = &ne_reset_8390;
 340     ei_status.block_input = &ne_block_input;
 341     ei_status.block_output = &ne_block_output;
 342     ei_status.get_8390_hdr = &ne_get_8390_hdr;
 343     NS8390_init(dev, 0);
 344     return 0;
 345 }
 346 
 347 /* Hard reset the card.  This used to pause for the same period that a
 348    8390 reset command required, but that shouldn't be necessary. */
 349 static void
 350 ne_reset_8390(struct device *dev)
     /*  */
 351 {
 352     unsigned long reset_start_time = jiffies;
 353 
 354     if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
 355 
 356     /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 357     outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 358 
 359     ei_status.txing = 0;
 360     ei_status.dmaing = 0;
 361 
 362     /* This check _should_not_ be necessary, omit eventually. */
 363     while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
 364         if (jiffies - reset_start_time > 2*HZ/100) {
 365             printk("%s: ne_reset_8390() did not complete.\n", dev->name);
 366             break;
 367         }
 368     outb_p(ENISR_RESET, NE_BASE + EN0_ISR);     /* Ack intr. */
 369 }
 370 
 371 /* Grab the 8390 specific header. Similar to the block_input routine, but
 372    we don't need to be concerned with ring wrap as the header will be at
 373    the start of a page, so we optimize accordingly. */
 374 
 375 static void
 376 ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
     /*  */
 377 {
 378 
 379     int nic_base = dev->base_addr;
 380 
 381     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 382     if (ei_status.dmaing) {
 383         printk("%s: DMAing conflict in ne_get_8390_hdr "
 384            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 385            dev->name, ei_status.dmaing, ei_status.irqlock,
 386            dev->interrupt);
 387         return;
 388     }
 389 
 390     ei_status.dmaing |= 0x01;
 391     outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 392     outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 393     outb_p(0, nic_base + EN0_RCNTHI);
 394     outb_p(0, nic_base + EN0_RSARLO);           /* On page boundary */
 395     outb_p(ring_page, nic_base + EN0_RSARHI);
 396     outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 397 
 398     if (ei_status.word16)
 399         insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
 400     else
 401         insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
 402 
 403     outb_p(ENISR_RDC, nic_base + EN0_ISR);      /* Ack intr. */
 404     ei_status.dmaing &= ~0x01;
 405 }
 406 
 407 /* Block input and output, similar to the Crynwr packet driver.  If you
 408    are porting to a new ethercard, look at the packet driver source for hints.
 409    The NEx000 doesn't share the on-board packet memory -- you have to put
 410    the packet out through the "remote DMA" dataport using outb. */
 411 
 412 static void
 413 ne_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
     /*  */
 414 {
 415 #ifdef CONFIG_NE_SANITY
 416     int xfer_count = count;
 417 #endif
 418     int nic_base = dev->base_addr;
 419     char *buf = skb->data;
 420 
 421     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 422     if (ei_status.dmaing) {
 423         printk("%s: DMAing conflict in ne_block_input "
 424            "[DMAstat:%d][irqlock:%d][intr:%d].\n",
 425            dev->name, ei_status.dmaing, ei_status.irqlock,
 426            dev->interrupt);
 427         return;
 428     }
 429     ei_status.dmaing |= 0x01;
 430     outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 431     outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 432     outb_p(count >> 8, nic_base + EN0_RCNTHI);
 433     outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 434     outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 435     outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 436     if (ei_status.word16) {
 437       insw(NE_BASE + NE_DATAPORT,buf,count>>1);
 438       if (count & 0x01) {
 439         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 440 #ifdef CONFIG_NE_SANITY
 441         xfer_count++;
 442 #endif
 443       }
 444     } else {
 445         insb(NE_BASE + NE_DATAPORT, buf, count);
 446     }
 447 
 448 #ifdef CONFIG_NE_SANITY
 449     /* This was for the ALPHA version only, but enough people have
 450        been encountering problems so it is still here.  If you see
 451        this message you either 1) have a slightly incompatible clone
 452        or 2) have noise/speed problems with your bus. */
 453     if (ei_debug > 1) {         /* DMA termination address check... */
 454         int addr, tries = 20;
 455         do {
 456             /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
 457                -- it's broken for Rx on some cards! */
 458             int high = inb_p(nic_base + EN0_RSARHI);
 459             int low = inb_p(nic_base + EN0_RSARLO);
 460             addr = (high << 8) + low;
 461             if (((ring_offset + xfer_count) & 0xff) == low)
 462                 break;
 463         } while (--tries > 0);
 464         if (tries <= 0)
 465             printk("%s: RX transfer address mismatch,"
 466                    "%#4.4x (expected) vs. %#4.4x (actual).\n",
 467                    dev->name, ring_offset + xfer_count, addr);
 468     }
 469 #endif
 470     outb_p(ENISR_RDC, nic_base + EN0_ISR);      /* Ack intr. */
 471     ei_status.dmaing &= ~0x01;
 472 }
 473 
 474 static void
 475 ne_block_output(struct device *dev, int count,
     /*  */
 476                 const unsigned char *buf, const int start_page)
 477 {
 478     int nic_base = NE_BASE;
 479     unsigned long dma_start;
 480 #ifdef CONFIG_NE_SANITY
 481     int retries = 0;
 482 #endif
 483 
 484     /* Round the count up for word writes.  Do we need to do this?
 485        What effect will an odd byte count have on the 8390?
 486        I should check someday. */
 487     if (ei_status.word16 && (count & 0x01))
 488       count++;
 489 
 490     /* This *shouldn't* happen. If it does, it's the last thing you'll see */
 491     if (ei_status.dmaing) {
 492         printk("%s: DMAing conflict in ne_block_output."
 493            "[DMAstat:%d][irqlock:%d][intr:%d]\n",
 494            dev->name, ei_status.dmaing, ei_status.irqlock,
 495            dev->interrupt);
 496         return;
 497     }
 498     ei_status.dmaing |= 0x01;
 499     /* We should already be in page 0, but to be safe... */
 500     outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 501 
 502 #ifdef CONFIG_NE_SANITY
 503  retry:
 504 #endif
 505 
 506 #ifdef NE8390_RW_BUGFIX
 507     /* Handle the read-before-write bug the same way as the
 508        Crynwr packet driver -- the NatSemi method doesn't work.
 509        Actually this doesn't always work either, but if you have
 510        problems with your NEx000 this is better than nothing! */
 511     outb_p(0x42, nic_base + EN0_RCNTLO);
 512     outb_p(0x00,   nic_base + EN0_RCNTHI);
 513     outb_p(0x42, nic_base + EN0_RSARLO);
 514     outb_p(0x00, nic_base + EN0_RSARHI);
 515     outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 516     /* Make certain that the dummy read has occurred. */
 517     SLOW_DOWN_IO;
 518     SLOW_DOWN_IO;
 519     SLOW_DOWN_IO;
 520 #endif
 521 
 522     outb_p(ENISR_RDC, nic_base + EN0_ISR);
 523 
 524    /* Now the normal output. */
 525     outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 526     outb_p(count >> 8,   nic_base + EN0_RCNTHI);
 527     outb_p(0x00, nic_base + EN0_RSARLO);
 528     outb_p(start_page, nic_base + EN0_RSARHI);
 529 
 530     outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 531     if (ei_status.word16) {
 532         outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
 533     } else {
 534         outsb(NE_BASE + NE_DATAPORT, buf, count);
 535     }
 536 
 537     dma_start = jiffies;
 538 
 539 #ifdef CONFIG_NE_SANITY
 540     /* This was for the ALPHA version only, but enough people have
 541        been encountering problems so it is still here. */
 542     if (ei_debug > 1) {         /* DMA termination address check... */
 543         int addr, tries = 20;
 544         do {
 545             int high = inb_p(nic_base + EN0_RSARHI);
 546             int low = inb_p(nic_base + EN0_RSARLO);
 547             addr = (high << 8) + low;
 548             if ((start_page << 8) + count == addr)
 549                 break;
 550         } while (--tries > 0);
 551         if (tries <= 0) {
 552             printk("%s: Tx packet transfer address mismatch,"
 553                    "%#4.4x (expected) vs. %#4.4x (actual).\n",
 554                    dev->name, (start_page << 8) + count, addr);
 555             if (retries++ == 0)
 556                 goto retry;
 557         }
 558     }
 559 #endif
 560 
 561     while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
 562         if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
 563                 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 564                 ne_reset_8390(dev);
 565                 NS8390_init(dev,1);
 566                 break;
 567         }
 568 
 569     outb_p(ENISR_RDC, nic_base + EN0_ISR);      /* Ack intr. */
 570     ei_status.dmaing &= ~0x01;
 571     return;
 572 }
 573 
 574 #ifdef MODULE
 575 char kernel_version[] = UTS_RELEASE;
 576 static char devicename[9] = { 0, };
 577 static struct device dev_ne2000 = {
 578         devicename, /* device name is inserted by linux/drivers/net/net_init.c */
 579         0, 0, 0, 0,
 580         0, 0,
 581         0, 0, 0, NULL, ne_probe };
 582 
 583 int io = 0x300;
 584 int irq = 0;
 585 
 586 int init_module(void)
     /*  */
 587 {
 588         if (io == 0)
 589                 printk("ne: You should not use auto-probing with insmod!\n");
 590         dev_ne2000.base_addr = io;
 591         dev_ne2000.irq       = irq;
 592         if (register_netdev(&dev_ne2000) != 0)
 593                 return -EIO;
 594         return 0;
 595 }
 596 
 597 void
 598 cleanup_module(void)
     /*  */
 599 {
 600         if (MOD_IN_USE)
 601                 printk("ne2000: device busy, remove delayed\n");
 602         else
 603         {
 604                 unregister_netdev(&dev_ne2000);
 605 
 606                 /* If we don't do this, we can't re-insmod it later. */
 607                 free_irq(dev_ne2000.irq);
 608                 release_region(dev_ne2000.base_addr, NE_IO_EXTENT);
 609         }
 610 }
 611 #endif /* MODULE */
 612 
 613 /*
 614  * Local variables:
 615  *  compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c"
 616  *  version-control: t
 617  *  kept-new-versions: 5
 618  * End:
 619  */
/* */
root/drivers/net/ne.c

DEFINITIONS
