linux/drivers/net/ne2.c
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   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 General 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   Wed Feb  7 21:24:00 CET 2001 (Alfred Arnold)
  50   - added support for the D-Link DE-320CT
  51
  52   *    WARNING
  53        -------
  54        This is alpha-test software.  It is not guaranteed to work. As a
  55        matter of fact, I'm quite sure there are *LOTS* of bugs in here. I
  56        would like to hear from you if you use this driver, even if it works.
  57        If it doesn't work, be sure to send me a mail with the problems !
  58*/
  59
  60static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n";
  61
  62#include <linux/module.h>
  63#include <linux/kernel.h>
  64#include <linux/types.h>
  65#include <linux/fcntl.h>
  66#include <linux/interrupt.h>
  67#include <linux/ioport.h>
  68#include <linux/in.h>
  69#include <linux/slab.h>
  70#include <linux/string.h>
  71#include <linux/errno.h>
  72#include <linux/init.h>
  73#include <linux/mca-legacy.h>
  74#include <linux/netdevice.h>
  75#include <linux/etherdevice.h>
  76#include <linux/skbuff.h>
  77#include <linux/bitops.h>
  78#include <linux/jiffies.h>
  79
  80#include <asm/system.h>
  81#include <asm/io.h>
  82#include <asm/dma.h>
  83
  84#include "8390.h"
  85
  86#define DRV_NAME "ne2"
  87
  88/* Some defines that people can play with if so inclined. */
  89
  90/* Do we perform extra sanity checks on stuff ? */
  91/* #define NE_SANITY_CHECK */
  92
  93/* Do we implement the read before write bugfix ? */
  94/* #define NE_RW_BUGFIX */
  95
  96/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
  97/* #define PACKETBUF_MEMSIZE    0x40 */
  98
  99
 100/* ---- No user-serviceable parts below ---- */
 101
 102#define NE_BASE  (dev->base_addr)
 103#define NE_CMD          0x00
 104#define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
 105#define NE_RESET        0x20    /* Issue a read to reset, a write to clear. */
 106#define NE_IO_EXTENT    0x30
 107
 108#define NE1SM_START_PG  0x20    /* First page of TX buffer */
 109#define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
 110#define NESM_START_PG   0x40    /* First page of TX buffer */
 111#define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
 112
 113/* From the .ADF file: */
 114static unsigned int addresses[7] __initdata =
 115                {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
 116static int irqs[4] __initdata = {3, 4, 5, 9};
 117
 118/* From the D-Link ADF file: */
 119static unsigned int dlink_addresses[4] __initdata =
 120                {0x300, 0x320, 0x340, 0x360};
 121static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
 122
 123struct ne2_adapters_t {
 124        unsigned int    id;
 125        char            *name;
 126};
 127
 128static struct ne2_adapters_t ne2_adapters[] __initdata = {
 129        { 0x6354, "Arco Ethernet Adapter AE/2" },
 130        { 0x70DE, "Compex ENET-16 MC/P" },
 131        { 0x7154, "Novell Ethernet Adapter NE/2" },
 132        { 0x56ea, "D-Link DE-320CT" },
 133        { 0x0000, NULL }
 134};
 135
 136extern int netcard_probe(struct net_device *dev);
 137
 138static int ne2_probe1(struct net_device *dev, int slot);
 139
 140static int ne_open(struct net_device *dev);
 141static int ne_close(struct net_device *dev);
 142
 143static void ne_reset_8390(struct net_device *dev);
 144static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
 145                int ring_page);
 146static void ne_block_input(struct net_device *dev, int count,
 147                struct sk_buff *skb, int ring_offset);
 148static void ne_block_output(struct net_device *dev, const int count,
 149                const unsigned char *buf, const int start_page);
 150
 151
 152/*
 153 * special code to read the DE-320's MAC address EEPROM.  In contrast to a
 154 * standard NE design, this is a serial EEPROM (93C46) that has to be read
 155 * bit by bit.  The EEPROM cotrol port at base + 0x1e has the following
 156 * layout:
 157 *
 158 * Bit 0 = Data out (read from EEPROM)
 159 * Bit 1 = Data in  (write to EEPROM)
 160 * Bit 2 = Clock
 161 * Bit 3 = Chip Select
 162 * Bit 7 = ~50 kHz clock for defined delays
 163 *
 164 */
 165
 166static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
 167{
 168        int z;
 169        unsigned char v1, v2;
 170
 171        /* write the value to the NIC EEPROM register */
 172
 173        outb(value, addr + 0x1e);
 174
 175        /* now wait the clock line to toggle twice.  Effectively, we are
 176           waiting (at least) for one clock cycle */
 177
 178        for (z = 0; z < 2; z++) {
 179                do {
 180                        v1 = inb(addr + 0x1e);
 181                        v2 = inb(addr + 0x1e);
 182                }
 183                while (!((v1 ^ v2) & 0x80));
 184        }
 185}
 186
 187static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
 188{
 189        /* shift data bit into correct position */
 190
 191        bit = bit << 1;
 192
 193        /* write value, keep clock line high for two cycles */
 194
 195        dlink_put_eeprom(0x09 | bit, addr);
 196        dlink_put_eeprom(0x0d | bit, addr);
 197        dlink_put_eeprom(0x0d | bit, addr);
 198        dlink_put_eeprom(0x09 | bit, addr);
 199}
 200
 201static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
 202{
 203        int z;
 204
 205        /* adjust bits so that they are left-aligned in a 16-bit-word */
 206
 207        value = value << (16 - len);
 208
 209        /* shift bits out to the EEPROM */
 210
 211        for (z = 0; z < len; z++) {
 212                dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
 213                value = value << 1;
 214        }
 215}
 216
 217static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
 218{
 219        int z;
 220        unsigned int value = 0;
 221
 222        /* pull the CS line low for a moment.  This resets the EEPROM-
 223           internal logic, and makes it ready for a new command. */
 224
 225        dlink_put_eeprom(0x01, addr);
 226        dlink_put_eeprom(0x09, addr);
 227
 228        /* send one start bit, read command (1 - 0), plus the address to
 229           the EEPROM */
 230
 231        dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
 232
 233        /* get the data word.  We clock by sending 0s to the EEPROM, which
 234           get ignored during the read process */
 235
 236        for (z = 0; z < 16; z++) {
 237                dlink_send_eeprom_bit(0, addr);
 238                value = (value << 1) | (inb(addr + 0x1e) & 0x01);
 239        }
 240
 241        return value;
 242}
 243
 244/*
 245 * Note that at boot, this probe only picks up one card at a time.
 246 */
 247
 248static int __init do_ne2_probe(struct net_device *dev)
 249{
 250        static int current_mca_slot = -1;
 251        int i;
 252        int adapter_found = 0;
 253
 254        /* Do not check any supplied i/o locations.
 255           POS registers usually don't fail :) */
 256
 257        /* MCA cards have POS registers.
 258           Autodetecting MCA cards is extremely simple.
 259           Just search for the card. */
 260
 261        for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
 262                current_mca_slot =
 263                        mca_find_unused_adapter(ne2_adapters[i].id, 0);
 264
 265                if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
 266                        int res;
 267                        mca_set_adapter_name(current_mca_slot,
 268                                        ne2_adapters[i].name);
 269                        mca_mark_as_used(current_mca_slot);
 270
 271                        res = ne2_probe1(dev, current_mca_slot);
 272                        if (res)
 273                                mca_mark_as_unused(current_mca_slot);
 274                        return res;
 275                }
 276        }
 277        return -ENODEV;
 278}
 279
 280#ifndef MODULE
 281struct net_device * __init ne2_probe(int unit)
 282{
 283        struct net_device *dev = alloc_eip_netdev();
 284        int err;
 285
 286        if (!dev)
 287                return ERR_PTR(-ENOMEM);
 288
 289        sprintf(dev->name, "eth%d", unit);
 290        netdev_boot_setup_check(dev);
 291
 292        err = do_ne2_probe(dev);
 293        if (err)
 294                goto out;
 295        return dev;
 296out:
 297        free_netdev(dev);
 298        return ERR_PTR(err);
 299}
 300#endif
 301
 302static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
 303{
 304        int len=0;
 305        DECLARE_MAC_BUF(mac);
 306
 307        len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
 308        len += sprintf(buf+len, "Driver written by Wim Dumon ");
 309        len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
 310        len += sprintf(buf+len, "Modified by ");
 311        len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
 312        len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
 313        len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
 314        len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
 315        len += sprintf(buf+len, "IRQ    : %d\n", dev->irq);
 316        len += sprintf(buf+len, "HW addr : %s\n", print_mac(mac, dev->dev_addr));
 317
 318        return len;
 319}
 320
 321static int __init ne2_probe1(struct net_device *dev, int slot)
 322{
 323        int i, base_addr, irq, retval;
 324        unsigned char POS;
 325        unsigned char SA_prom[32];
 326        const char *name = "NE/2";
 327        int start_page, stop_page;
 328        static unsigned version_printed;
 329        DECLARE_MAC_BUF(mac);
 330
 331        if (ei_debug && version_printed++ == 0)
 332                printk(version);
 333
 334        printk("NE/2 ethercard found in slot %d:", slot);
 335
 336        /* Read base IO and IRQ from the POS-registers */
 337        POS = mca_read_stored_pos(slot, 2);
 338        if(!(POS % 2)) {
 339                printk(" disabled.\n");
 340                return -ENODEV;
 341        }
 342
 343        /* handle different POS register structure for D-Link card */
 344
 345        if (mca_read_stored_pos(slot, 0) == 0xea) {
 346                base_addr = dlink_addresses[(POS >> 5) & 0x03];
 347                irq = dlink_irqs[(POS >> 2) & 0x07];
 348        }
 349        else {
 350                i = (POS & 0xE)>>1;
 351                /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
 352                " en zou het moeten werken -> %d\n", i);
 353                The above line was for remote testing, thanx to sdog ... */
 354                base_addr = addresses[i - 1];
 355                irq = irqs[(POS & 0x60)>>5];
 356        }
 357
 358        if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
 359                return -EBUSY;
 360
 361#ifdef DEBUG
 362        printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
 363                        base_addr, irq);
 364#endif
 365
 366#ifndef CRYNWR_WAY
 367        /* Reset the card the way they do it in the Crynwr packet driver */
 368        for (i=0; i<8; i++)
 369                outb(0x0, base_addr + NE_RESET);
 370        inb(base_addr + NE_RESET);
 371        outb(0x21, base_addr + NE_CMD);
 372        if (inb(base_addr + NE_CMD) != 0x21) {
 373                printk("NE/2 adapter not responding\n");
 374                retval = -ENODEV;
 375                goto out;
 376        }
 377
 378        /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
 379           my RAM is okay.  Suppose your memory is broken.  Then this test
 380           should fail and you won't be able to use your card.  But if I do not
 381           test, you won't be able to use your card, neither.  So this test
 382           won't help you. */
 383
 384#else  /* _I_ never tested it this way .. Go ahead and try ...*/
 385        /* Reset card. Who knows what dain-bramaged state it was left in. */
 386        {
 387                unsigned long reset_start_time = jiffies;
 388
 389                /* DON'T change these to inb_p/outb_p or reset will fail on
 390                   clones.. */
 391                outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
 392
 393                while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
 394                        if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 395                                printk(" not found (no reset ack).\n");
 396                                retval = -ENODEV;
 397                                goto out;
 398                        }
 399
 400                outb_p(0xff, base_addr + EN0_ISR);         /* Ack all intr. */
 401        }
 402#endif
 403
 404
 405        /* Read the 16 bytes of station address PROM.
 406           We must first initialize registers, similar to
 407           NS8390p_init(eifdev, 0).
 408           We can't reliably read the SAPROM address without this.
 409           (I learned the hard way!). */
 410        {
 411                struct {
 412                        unsigned char value, offset;
 413                } program_seq[] = {
 414                                                /* Select page 0 */
 415                        {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
 416                        {0x49,  EN0_DCFG},  /* Set WORD-wide (0x49) access. */
 417                        {0x00,  EN0_RCNTLO},  /* Clear the count regs. */
 418                        {0x00,  EN0_RCNTHI},
 419                        {0x00,  EN0_IMR},  /* Mask completion irq. */
 420                        {0xFF,  EN0_ISR},
 421                        {E8390_RXOFF, EN0_RXCR},  /* 0x20  Set to monitor */
 422                        {E8390_TXOFF, EN0_TXCR},  /* 0x02  and loopback mode. */
 423                        {32,    EN0_RCNTLO},
 424                        {0x00,  EN0_RCNTHI},
 425                        {0x00,  EN0_RSARLO},  /* DMA starting at 0x0000. */
 426                        {0x00,  EN0_RSARHI},
 427                        {E8390_RREAD+E8390_START, E8390_CMD},
 428                };
 429
 430                for (i = 0; i < ARRAY_SIZE(program_seq); i++)
 431                        outb_p(program_seq[i].value, base_addr +
 432                                program_seq[i].offset);
 433
 434        }
 435        for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
 436                SA_prom[i] = inb(base_addr + NE_DATAPORT);
 437        }
 438
 439        /* I don't know whether the previous sequence includes the general
 440           board reset procedure, so better don't omit it and just overwrite
 441           the garbage read from a DE-320 with correct stuff. */
 442
 443        if (mca_read_stored_pos(slot, 0) == 0xea) {
 444                unsigned int v;
 445
 446                for (i = 0; i < 3; i++) {
 447                        v = dlink_get_eeprom(i, base_addr);
 448                        SA_prom[(i << 1)    ] = v & 0xff;
 449                        SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
 450                }
 451        }
 452
 453        start_page = NESM_START_PG;
 454        stop_page = NESM_STOP_PG;
 455
 456        dev->irq=irq;
 457
 458        /* Snarf the interrupt now.  There's no point in waiting since we cannot
 459           share and the board will usually be enabled. */
 460        retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev);
 461        if (retval) {
 462                printk (" unable to get IRQ %d (irqval=%d).\n",
 463                                dev->irq, retval);
 464                goto out;
 465        }
 466
 467        dev->base_addr = base_addr;
 468
 469        for(i = 0; i < ETHER_ADDR_LEN; i++)
 470                dev->dev_addr[i] = SA_prom[i];
 471
 472        printk(" %s\n", print_mac(mac, dev->dev_addr));
 473
 474        printk("%s: %s found at %#x, using IRQ %d.\n",
 475                        dev->name, name, base_addr, dev->irq);
 476
 477        mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
 478
 479        ei_status.name = name;
 480        ei_status.tx_start_page = start_page;
 481        ei_status.stop_page = stop_page;
 482        ei_status.word16 = (2 == 2);
 483
 484        ei_status.rx_start_page = start_page + TX_PAGES;
 485#ifdef PACKETBUF_MEMSIZE
 486        /* Allow the packet buffer size to be overridden by know-it-alls. */
 487        ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
 488#endif
 489
 490        ei_status.reset_8390 = &ne_reset_8390;
 491        ei_status.block_input = &ne_block_input;
 492        ei_status.block_output = &ne_block_output;
 493        ei_status.get_8390_hdr = &ne_get_8390_hdr;
 494
 495        ei_status.priv = slot;
 496
 497        dev->open = &ne_open;
 498        dev->stop = &ne_close;
 499#ifdef CONFIG_NET_POLL_CONTROLLER
 500        dev->poll_controller = eip_poll;
 501#endif
 502        NS8390p_init(dev, 0);
 503
 504        retval = register_netdev(dev);
 505        if (retval)
 506                goto out1;
 507        return 0;
 508out1:
 509        mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
 510        free_irq(dev->irq, dev);
 511out:
 512        release_region(base_addr, NE_IO_EXTENT);
 513        return retval;
 514}
 515
 516static int ne_open(struct net_device *dev)
 517{
 518        eip_open(dev);
 519        return 0;
 520}
 521
 522static int ne_close(struct net_device *dev)
 523{
 524        if (ei_debug > 1)
 525                printk("%s: Shutting down ethercard.\n", dev->name);
 526        eip_close(dev);
 527        return 0;
 528}
 529
 530/* Hard reset the card.  This used to pause for the same period that a
 531   8390 reset command required, but that shouldn't be necessary. */
 532static void ne_reset_8390(struct net_device *dev)
 533{
 534        unsigned long reset_start_time = jiffies;
 535
 536        if (ei_debug > 1)
 537                printk("resetting the 8390 t=%ld...", jiffies);
 538
 539        /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
 540        outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 541
 542        ei_status.txing = 0;
 543        ei_status.dmaing = 0;
 544
 545        /* This check _should_not_ be necessary, omit eventually. */
 546        while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
 547                if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
 548                        printk("%s: ne_reset_8390() did not complete.\n",
 549                                        dev->name);
 550                        break;
 551                }
 552        outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
 553}
 554
 555/* Grab the 8390 specific header. Similar to the block_input routine, but
 556   we don't need to be concerned with ring wrap as the header will be at
 557   the start of a page, so we optimize accordingly. */
 558
 559static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
 560                int ring_page)
 561{
 562
 563        int nic_base = dev->base_addr;
 564
 565        /* This *shouldn't* happen.
 566           If it does, it's the last thing you'll see */
 567        if (ei_status.dmaing) {
 568                printk("%s: DMAing conflict in ne_get_8390_hdr "
 569                                "[DMAstat:%d][irqlock:%d].\n",
 570                                dev->name, ei_status.dmaing, ei_status.irqlock);
 571                return;
 572        }
 573
 574        ei_status.dmaing |= 0x01;
 575        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 576        outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
 577        outb_p(0, nic_base + EN0_RCNTHI);
 578        outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
 579        outb_p(ring_page, nic_base + EN0_RSARHI);
 580        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 581
 582        if (ei_status.word16)
 583                insw(NE_BASE + NE_DATAPORT, hdr,
 584                                sizeof(struct e8390_pkt_hdr)>>1);
 585        else
 586                insb(NE_BASE + NE_DATAPORT, hdr,
 587                                sizeof(struct e8390_pkt_hdr));
 588
 589        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 590        ei_status.dmaing &= ~0x01;
 591}
 592
 593/* Block input and output, similar to the Crynwr packet driver.  If you
 594   are porting to a new ethercard, look at the packet driver source for
 595   hints. The NEx000 doesn't share the on-board packet memory -- you have
 596   to put the packet out through the "remote DMA" dataport using outb. */
 597
 598static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
 599                int ring_offset)
 600{
 601#ifdef NE_SANITY_CHECK
 602        int xfer_count = count;
 603#endif
 604        int nic_base = dev->base_addr;
 605        char *buf = skb->data;
 606
 607        /* This *shouldn't* happen.
 608           If it does, it's the last thing you'll see */
 609        if (ei_status.dmaing) {
 610                printk("%s: DMAing conflict in ne_block_input "
 611                                "[DMAstat:%d][irqlock:%d].\n",
 612                                dev->name, ei_status.dmaing, ei_status.irqlock);
 613                return;
 614        }
 615        ei_status.dmaing |= 0x01;
 616        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
 617        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 618        outb_p(count >> 8, nic_base + EN0_RCNTHI);
 619        outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 620        outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 621        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 622        if (ei_status.word16) {
 623                insw(NE_BASE + NE_DATAPORT,buf,count>>1);
 624                if (count & 0x01) {
 625                        buf[count-1] = inb(NE_BASE + NE_DATAPORT);
 626#ifdef NE_SANITY_CHECK
 627                        xfer_count++;
 628#endif
 629                }
 630        } else {
 631                insb(NE_BASE + NE_DATAPORT, buf, count);
 632        }
 633
 634#ifdef NE_SANITY_CHECK
 635        /* This was for the ALPHA version only, but enough people have
 636           been encountering problems so it is still here.  If you see
 637           this message you either 1) have a slightly incompatible clone
 638           or 2) have noise/speed problems with your bus. */
 639        if (ei_debug > 1) {     /* DMA termination address check... */
 640                int addr, tries = 20;
 641                do {
 642                        /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
 643                           -- it's broken for Rx on some cards! */
 644                        int high = inb_p(nic_base + EN0_RSARHI);
 645                        int low = inb_p(nic_base + EN0_RSARLO);
 646                        addr = (high << 8) + low;
 647                        if (((ring_offset + xfer_count) & 0xff) == low)
 648                                break;
 649                } while (--tries > 0);
 650                if (tries <= 0)
 651                        printk("%s: RX transfer address mismatch,"
 652                                "%#4.4x (expected) vs. %#4.4x (actual).\n",
 653                                dev->name, ring_offset + xfer_count, addr);
 654        }
 655#endif
 656        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 657        ei_status.dmaing &= ~0x01;
 658}
 659
 660static void ne_block_output(struct net_device *dev, int count,
 661                const unsigned char *buf, const int start_page)
 662{
 663        int nic_base = NE_BASE;
 664        unsigned long dma_start;
 665#ifdef NE_SANITY_CHECK
 666        int retries = 0;
 667#endif
 668
 669        /* Round the count up for word writes. Do we need to do this?
 670           What effect will an odd byte count have on the 8390?
 671           I should check someday. */
 672        if (ei_status.word16 && (count & 0x01))
 673                count++;
 674
 675        /* This *shouldn't* happen.
 676           If it does, it's the last thing you'll see */
 677        if (ei_status.dmaing) {
 678                printk("%s: DMAing conflict in ne_block_output."
 679                                "[DMAstat:%d][irqlock:%d]\n",
 680                                dev->name, ei_status.dmaing, ei_status.irqlock);
 681                return;
 682        }
 683        ei_status.dmaing |= 0x01;
 684        /* We should already be in page 0, but to be safe... */
 685        outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
 686
 687#ifdef NE_SANITY_CHECK
 688retry:
 689#endif
 690
 691#ifdef NE8390_RW_BUGFIX
 692        /* Handle the read-before-write bug the same way as the
 693           Crynwr packet driver -- the NatSemi method doesn't work.
 694           Actually this doesn't always work either, but if you have
 695           problems with your NEx000 this is better than nothing! */
 696        outb_p(0x42, nic_base + EN0_RCNTLO);
 697        outb_p(0x00, nic_base + EN0_RCNTHI);
 698        outb_p(0x42, nic_base + EN0_RSARLO);
 699        outb_p(0x00, nic_base + EN0_RSARHI);
 700        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
 701        /* Make certain that the dummy read has occurred. */
 702        SLOW_DOWN_IO;
 703        SLOW_DOWN_IO;
 704        SLOW_DOWN_IO;
 705#endif
 706
 707        outb_p(ENISR_RDC, nic_base + EN0_ISR);
 708
 709        /* Now the normal output. */
 710        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
 711        outb_p(count >> 8,   nic_base + EN0_RCNTHI);
 712        outb_p(0x00, nic_base + EN0_RSARLO);
 713        outb_p(start_page, nic_base + EN0_RSARHI);
 714
 715        outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
 716        if (ei_status.word16) {
 717                outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
 718        } else {
 719                outsb(NE_BASE + NE_DATAPORT, buf, count);
 720        }
 721
 722        dma_start = jiffies;
 723
 724#ifdef NE_SANITY_CHECK
 725        /* This was for the ALPHA version only, but enough people have
 726           been encountering problems so it is still here. */
 727
 728        if (ei_debug > 1) {             /* DMA termination address check... */
 729                int addr, tries = 20;
 730                do {
 731                        int high = inb_p(nic_base + EN0_RSARHI);
 732                        int low = inb_p(nic_base + EN0_RSARLO);
 733                        addr = (high << 8) + low;
 734                        if ((start_page << 8) + count == addr)
 735                                break;
 736                } while (--tries > 0);
 737                if (tries <= 0) {
 738                        printk("%s: Tx packet transfer address mismatch,"
 739                                        "%#4.4x (expected) vs. %#4.4x (actual).\n",
 740                                        dev->name, (start_page << 8) + count, addr);
 741                        if (retries++ == 0)
 742                                goto retry;
 743                }
 744        }
 745#endif
 746
 747        while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
 748                if (time_after(jiffies, dma_start + 2*HZ/100)) {                /* 20ms */
 749                        printk("%s: timeout waiting for Tx RDC.\n", dev->name);
 750                        ne_reset_8390(dev);
 751                        NS8390p_init(dev, 1);
 752                        break;
 753                }
 754
 755        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
 756        ei_status.dmaing &= ~0x01;
 757        return;
 758}
 759
 760
 761#ifdef MODULE
 762#define MAX_NE_CARDS    4       /* Max number of NE cards per module */
 763static struct net_device *dev_ne[MAX_NE_CARDS];
 764static int io[MAX_NE_CARDS];
 765static int irq[MAX_NE_CARDS];
 766static int bad[MAX_NE_CARDS];   /* 0xbad = bad sig or no reset ack */
 767MODULE_LICENSE("GPL");
 768
 769module_param_array(io, int, NULL, 0);
 770module_param_array(irq, int, NULL, 0);
 771module_param_array(bad, int, NULL, 0);
 772MODULE_PARM_DESC(io, "(ignored)");
 773MODULE_PARM_DESC(irq, "(ignored)");
 774MODULE_PARM_DESC(bad, "(ignored)");
 775
 776/* Module code fixed by David Weinehall */
 777
 778int __init init_module(void)
 779{
 780        struct net_device *dev;
 781        int this_dev, found = 0;
 782
 783        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 784                dev = alloc_eip_netdev();
 785                if (!dev)
 786                        break;
 787                dev->irq = irq[this_dev];
 788                dev->mem_end = bad[this_dev];
 789                dev->base_addr = io[this_dev];
 790                if (do_ne2_probe(dev) == 0) {
 791                        dev_ne[found++] = dev;
 792                        continue;
 793                }
 794                free_netdev(dev);
 795                break;
 796        }
 797        if (found)
 798                return 0;
 799        printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
 800        return -ENXIO;
 801}
 802
 803static void cleanup_card(struct net_device *dev)
 804{
 805        mca_mark_as_unused(ei_status.priv);
 806        mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
 807        free_irq(dev->irq, dev);
 808        release_region(dev->base_addr, NE_IO_EXTENT);
 809}
 810
 811void __exit cleanup_module(void)
 812{
 813        int this_dev;
 814
 815        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
 816                struct net_device *dev = dev_ne[this_dev];
 817                if (dev) {
 818                        unregister_netdev(dev);
 819                        cleanup_card(dev);
 820                        free_netdev(dev);
 821                }
 822        }
 823}
 824#endif /* MODULE */
 825
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