Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
/*
    Written 1992-94 by Donald Becker.

    Copyright 1993 United States Government as represented by the
    Director, National Security Agency.

    This software may be used and distributed according to the terms
    of the GNU General Public License, incorporated herein by reference.

    The author may be reached as becker@scyld.com, or C/O
    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403

    This driver should work with many programmed-I/O 8390-based ethernet
    boards.  Currently it supports the NE1000, NE2000, many clones,
    and some Cabletron products.

    Changelog:

    Paul Gortmaker	: use ENISR_RDC to monitor Tx PIO uploads, made
			  sanity checks and bad clone support optional.
    Paul Gortmaker	: new reset code, reset card after probe at boot.
    Paul Gortmaker	: multiple card support for module users.
    Paul Gortmaker	: Support for PCI ne2k clones, similar to lance.c
    Paul Gortmaker	: Allow users with bad cards to avoid full probe.
    Paul Gortmaker	: PCI probe changes, more PCI cards supported.
    rjohnson@analogic.com : Changed init order so an interrupt will only
    occur after memory is allocated for dev->priv. Deallocated memory
    last in cleanup_modue()
    Richard Guenther    : Added support for ISAPnP cards
    Paul Gortmaker	: Discontinued PCI support - use ne2k-pci.c instead.
    Hayato Fujiwara	: Add m32r support.

*/

/* Routines for the NatSemi-based designs (NE[12]000). */

static const char version1[] =
"ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
static const char version2[] =
"Last modified Nov 1, 2000 by Paul Gortmaker\n";


#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/isapnp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>

#include <asm/system.h>
#include <asm/io.h>

#include "8390.h"

#define DRV_NAME "ne"

/* Some defines that people can play with if so inclined. */

/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
#define SUPPORT_NE_BAD_CLONES
/* 0xbad = bad sig or no reset ack */
#define BAD 0xbad

#define MAX_NE_CARDS	4	/* Max number of NE cards per module */
static struct platform_device *pdev_ne[MAX_NE_CARDS];
static int io[MAX_NE_CARDS];
static int irq[MAX_NE_CARDS];
static int bad[MAX_NE_CARDS];

#ifdef MODULE
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(bad, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es),required");
MODULE_PARM_DESC(irq, "IRQ number(s)");
MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
MODULE_LICENSE("GPL");
#endif /* MODULE */

/* Do we perform extra sanity checks on stuff ? */
/* #define NE_SANITY_CHECK */

/* Do we implement the read before write bugfix ? */
/* #define NE_RW_BUGFIX */

/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
/* #define PACKETBUF_MEMSIZE	0x40 */

/* This is set up so that no ISA autoprobe takes place. We can't guarantee
that the ne2k probe is the last 8390 based probe to take place (as it
is at boot) and so the probe will get confused by any other 8390 cards.
ISA device autoprobes on a running machine are not recommended anyway. */
#if !defined(MODULE) && (defined(CONFIG_ISA) || defined(CONFIG_M32R))
/* Do we need a portlist for the ISA auto-probe ? */
#define NEEDS_PORTLIST
#endif

/* A zero-terminated list of I/O addresses to be probed at boot. */
#ifdef NEEDS_PORTLIST
static unsigned int netcard_portlist[] __initdata = {
	0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
};
#endif

static struct isapnp_device_id isapnp_clone_list[] __initdata = {
	{	ISAPNP_CARD_ID('A','X','E',0x2011),
		ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
		(long) "NetGear EA201" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
		(long) "NN NE2000" },
	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
		(long) "Generic PNP" },
	{ }	/* terminate list */
};

MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);

#ifdef SUPPORT_NE_BAD_CLONES
/* A list of bad clones that we none-the-less recognize. */
static struct { const char *name8, *name16; unsigned char SAprefix[4];}
bad_clone_list[] __initdata = {
    {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
    {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
    {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
    {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
    {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
    {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
    {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
    {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
    {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
    {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
    {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
    {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
    {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
#ifdef CONFIG_MACH_TX49XX
    {"RBHMA4X00-RTL8019", "RBHMA4X00/RTL8019", {0x00, 0x60, 0x0a}},  /* Toshiba built-in */
#endif
    {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
    {NULL,}
};
#endif

/* ---- No user-serviceable parts below ---- */

#define NE_BASE	 (dev->base_addr)
#define NE_CMD	 	0x00
#define NE_DATAPORT	0x10	/* NatSemi-defined port window offset. */
#define NE_RESET	0x1f	/* Issue a read to reset, a write to clear. */
#define NE_IO_EXTENT	0x20

#define NE1SM_START_PG	0x20	/* First page of TX buffer */
#define NE1SM_STOP_PG 	0x40	/* Last page +1 of RX ring */
#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */

#if defined(CONFIG_PLAT_MAPPI)
#  define DCR_VAL 0x4b
#elif defined(CONFIG_PLAT_OAKS32R)  || \
   defined(CONFIG_MACH_TX49XX)
#  define DCR_VAL 0x48		/* 8-bit mode */
#else
#  define DCR_VAL 0x49
#endif

static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
static int ne_probe_isapnp(struct net_device *dev);

static void ne_reset_8390(struct net_device *dev);
static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
			  int ring_page);
static void ne_block_input(struct net_device *dev, int count,
			  struct sk_buff *skb, int ring_offset);
static void ne_block_output(struct net_device *dev, const int count,
		const unsigned char *buf, const int start_page);


/*  Probe for various non-shared-memory ethercards.

   NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
   buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
   the SAPROM, while other supposed NE2000 clones must be detected by their
   SA prefix.

   Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
   mode results in doubled values, which can be detected and compensated for.

   The probe is also responsible for initializing the card and filling
   in the 'dev' and 'ei_status' structures.

   We use the minimum memory size for some ethercard product lines, iff we can't
   distinguish models.  You can increase the packet buffer size by setting
   PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
	E1010   starts at 0x100 and ends at 0x2000.
	E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
	E2010	 starts at 0x100 and ends at 0x4000.
	E2010-x starts at 0x100 and ends at 0xffff.  */

static int __init do_ne_probe(struct net_device *dev)
{
	unsigned long base_addr = dev->base_addr;
#ifdef NEEDS_PORTLIST
	int orig_irq = dev->irq;
#endif

	/* First check any supplied i/o locations. User knows best. <cough> */
	if (base_addr > 0x1ff) {	/* Check a single specified location. */
		int ret = ne_probe1(dev, base_addr);
		if (ret)
			printk(KERN_WARNING "ne.c: No NE*000 card found at "
				"i/o = %#lx\n", base_addr);
		return ret;
	}
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

	/* Then look for any installed ISAPnP clones */
	if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
		return 0;

#ifdef NEEDS_PORTLIST
	/* Last resort. The semi-risky ISA auto-probe. */
	for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
		int ioaddr = netcard_portlist[base_addr];
		dev->irq = orig_irq;
		if (ne_probe1(dev, ioaddr) == 0)
			return 0;
	}
#endif

	return -ENODEV;
}

static int __init ne_probe_isapnp(struct net_device *dev)
{
	int i;

	for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
		struct pnp_dev *idev = NULL;

		while ((idev = pnp_find_dev(NULL,
					    isapnp_clone_list[i].vendor,
					    isapnp_clone_list[i].function,
					    idev))) {
			/* Avoid already found cards from previous calls */
			if (pnp_device_attach(idev) < 0)
				continue;
			if (pnp_activate_dev(idev) < 0) {
			      	pnp_device_detach(idev);
			      	continue;
			}
			/* if no io and irq, search for next */
			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
				pnp_device_detach(idev);
				continue;
			}
			/* found it */
			dev->base_addr = pnp_port_start(idev, 0);
			dev->irq = pnp_irq(idev, 0);
			printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
				(char *) isapnp_clone_list[i].driver_data,
				dev->base_addr, dev->irq);
			if (ne_probe1(dev, dev->base_addr) != 0) {	/* Shouldn't happen. */
				printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
				pnp_device_detach(idev);
				return -ENXIO;
			}
			ei_status.priv = (unsigned long)idev;
			break;
		}
		if (!idev)
			continue;
		return 0;
	}

	return -ENODEV;
}

static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
{
	int i;
	unsigned char SA_prom[32];
	int wordlength = 2;
	const char *name = NULL;
	int start_page, stop_page;
	int neX000, ctron, copam, bad_card;
	int reg0, ret;
	static unsigned version_printed;

	if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
		return -EBUSY;

	reg0 = inb_p(ioaddr);
	if (reg0 == 0xFF) {
		ret = -ENODEV;
		goto err_out;
	}

	/* Do a preliminary verification that we have a 8390. */
	{
		int regd;
		outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
		regd = inb_p(ioaddr + 0x0d);
		outb_p(0xff, ioaddr + 0x0d);
		outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
		inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
		if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
			outb_p(reg0, ioaddr);
			outb_p(regd, ioaddr + 0x0d);	/* Restore the old values. */
			ret = -ENODEV;
			goto err_out;
		}
	}

	if (ei_debug  &&  version_printed++ == 0)
		printk(KERN_INFO "%s%s", version1, version2);

	printk(KERN_INFO "NE*000 ethercard probe at %#3lx:", ioaddr);

	/* A user with a poor card that fails to ack the reset, or that
	   does not have a valid 0x57,0x57 signature can still use this
	   without having to recompile. Specifying an i/o address along
	   with an otherwise unused dev->mem_end value of "0xBAD" will
	   cause the driver to skip these parts of the probe. */

	bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));

	/* Reset card. Who knows what dain-bramaged state it was left in. */

	{
		unsigned long reset_start_time = jiffies;

		/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
		outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);

		while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
			if (bad_card) {
				printk(" (warning: no reset ack)");
				break;
			} else {
				printk(" not found (no reset ack).\n");
				ret = -ENODEV;
				goto err_out;
			}
		}

		outb_p(0xff, ioaddr + EN0_ISR);		/* Ack all intr. */
	}

	/* Read the 16 bytes of station address PROM.
	   We must first initialize registers, similar to NS8390p_init(eifdev, 0).
	   We can't reliably read the SAPROM address without this.
	   (I learned the hard way!). */
	{
		struct {unsigned char value, offset; } program_seq[] =
		{
			{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
			{0x48,	EN0_DCFG},	/* Set byte-wide (0x48) access. */
			{0x00,	EN0_RCNTLO},	/* Clear the count regs. */
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_IMR},	/* Mask completion irq. */
			{0xFF,	EN0_ISR},
			{E8390_RXOFF, EN0_RXCR},	/* 0x20  Set to monitor */
			{E8390_TXOFF, EN0_TXCR},	/* 0x02  and loopback mode. */
			{32,	EN0_RCNTLO},
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_RSARLO},	/* DMA starting at 0x0000. */
			{0x00,	EN0_RSARHI},
			{E8390_RREAD+E8390_START, E8390_CMD},
		};

		for (i = 0; i < ARRAY_SIZE(program_seq); i++)
			outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);

	}
	for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
		SA_prom[i] = inb(ioaddr + NE_DATAPORT);
		SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
		if (SA_prom[i] != SA_prom[i+1])
			wordlength = 1;
	}

	if (wordlength == 2)
	{
		for (i = 0; i < 16; i++)
			SA_prom[i] = SA_prom[i+i];
		/* We must set the 8390 for word mode. */
		outb_p(DCR_VAL, ioaddr + EN0_DCFG);
		start_page = NESM_START_PG;

		/*
		 * Realtek RTL8019AS datasheet says that the PSTOP register
		 * shouldn't exceed 0x60 in 8-bit mode.
		 * This chip can be identified by reading the signature from
		 * the  remote byte count registers (otherwise write-only)...
		 */
		if ((DCR_VAL & 0x01) == 0 &&		/* 8-bit mode */
		    inb(ioaddr + EN0_RCNTLO) == 0x50 &&
		    inb(ioaddr + EN0_RCNTHI) == 0x70)
			stop_page = 0x60;
		else
			stop_page = NESM_STOP_PG;
	} else {
		start_page = NE1SM_START_PG;
		stop_page  = NE1SM_STOP_PG;
	}

#if  defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
	neX000 = ((SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57)
		|| (SA_prom[14] == 0x42 && SA_prom[15] == 0x42));
#else
	neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
#endif
	ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
	copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);

	/* Set up the rest of the parameters. */
	if (neX000 || bad_card || copam) {
		name = (wordlength == 2) ? "NE2000" : "NE1000";
	}
	else if (ctron)
	{
		name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
		start_page = 0x01;
		stop_page = (wordlength == 2) ? 0x40 : 0x20;
	}
	else
	{
#ifdef SUPPORT_NE_BAD_CLONES
		/* Ack!  Well, there might be a *bad* NE*000 clone there.
		   Check for total bogus addresses. */
		for (i = 0; bad_clone_list[i].name8; i++)
		{
			if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
				SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
				SA_prom[2] == bad_clone_list[i].SAprefix[2])
			{
				if (wordlength == 2)
				{
					name = bad_clone_list[i].name16;
				} else {
					name = bad_clone_list[i].name8;
				}
				break;
			}
		}
		if (bad_clone_list[i].name8 == NULL)
		{
			printk(" not found (invalid signature %2.2x %2.2x).\n",
				SA_prom[14], SA_prom[15]);
			ret = -ENXIO;
			goto err_out;
		}
#else
		printk(" not found.\n");
		ret = -ENXIO;
		goto err_out;
#endif
	}

	if (dev->irq < 2)
	{
		unsigned long cookie = probe_irq_on();
		outb_p(0x50, ioaddr + EN0_IMR);	/* Enable one interrupt. */
		outb_p(0x00, ioaddr + EN0_RCNTLO);
		outb_p(0x00, ioaddr + EN0_RCNTHI);
		outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
		mdelay(10);		/* wait 10ms for interrupt to propagate */
		outb_p(0x00, ioaddr + EN0_IMR); 		/* Mask it again. */
		dev->irq = probe_irq_off(cookie);
		if (ei_debug > 2)
			printk(" autoirq is %d\n", dev->irq);
	} else if (dev->irq == 2)
		/* Fixup for users that don't know that IRQ 2 is really IRQ 9,
		   or don't know which one to set. */
		dev->irq = 9;

	if (! dev->irq) {
		printk(" failed to detect IRQ line.\n");
		ret = -EAGAIN;
		goto err_out;
	}

	/* Snarf the interrupt now.  There's no point in waiting since we cannot
	   share and the board will usually be enabled. */
	ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
	if (ret) {
		printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
		goto err_out;
	}

	dev->base_addr = ioaddr;

#ifdef CONFIG_PLAT_MAPPI
	outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
		ioaddr + E8390_CMD); /* 0x61 */
	for (i = 0 ; i < ETHER_ADDR_LEN ; i++) {
		dev->dev_addr[i] = SA_prom[i]
			= inb_p(ioaddr + EN1_PHYS_SHIFT(i));
	}
#else
	for(i = 0; i < ETHER_ADDR_LEN; i++) {
		dev->dev_addr[i] = SA_prom[i];
	}
#endif

	printk("%pM\n", dev->dev_addr);

	ei_status.name = name;
	ei_status.tx_start_page = start_page;
	ei_status.stop_page = stop_page;

	/* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
	ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));

	ei_status.rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
	 /* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_status.reset_8390 = &ne_reset_8390;
	ei_status.block_input = &ne_block_input;
	ei_status.block_output = &ne_block_output;
	ei_status.get_8390_hdr = &ne_get_8390_hdr;
	ei_status.priv = 0;

	dev->netdev_ops = &eip_netdev_ops;
	NS8390p_init(dev, 0);

	ret = register_netdev(dev);
	if (ret)
		goto out_irq;
	printk(KERN_INFO "%s: %s found at %#lx, using IRQ %d.\n",
	       dev->name, name, ioaddr, dev->irq);
	return 0;

out_irq:
	free_irq(dev->irq, dev);
err_out:
	release_region(ioaddr, NE_IO_EXTENT);
	return ret;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */

static void ne_reset_8390(struct net_device *dev)
{
	unsigned long reset_start_time = jiffies;

	if (ei_debug > 1)
		printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);

	/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
	outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);

	ei_status.txing = 0;
	ei_status.dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
			printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
			break;
		}
	outb_p(ENISR_RESET, NE_BASE + EN0_ISR);	/* Ack intr. */
}

/* Grab the 8390 specific header. Similar to the block_input routine, but
   we don't need to be concerned with ring wrap as the header will be at
   the start of a page, so we optimize accordingly. */

static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	int nic_base = dev->base_addr;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */

	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
			"[DMAstat:%d][irqlock:%d].\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
	outb_p(0, nic_base + EN0_RCNTHI);
	outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
	outb_p(ring_page, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_status.word16)
		insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
	else
		insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));

	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;

	le16_to_cpus(&hdr->count);
}

/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for hints.
   The NEx000 doesn't share the on-board packet memory -- you have to put
   the packet out through the "remote DMA" dataport using outb. */

static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
#ifdef NE_SANITY_CHECK
	int xfer_count = count;
#endif
	int nic_base = dev->base_addr;
	char *buf = skb->data;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
			"[DMAstat:%d][irqlock:%d].\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
	outb_p(count >> 8, nic_base + EN0_RCNTHI);
	outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
	outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
	if (ei_status.word16)
	{
		insw(NE_BASE + NE_DATAPORT,buf,count>>1);
		if (count & 0x01)
		{
			buf[count-1] = inb(NE_BASE + NE_DATAPORT);
#ifdef NE_SANITY_CHECK
			xfer_count++;
#endif
		}
	} else {
		insb(NE_BASE + NE_DATAPORT, buf, count);
	}

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here.  If you see
	   this message you either 1) have a slightly incompatible clone
	   or 2) have noise/speed problems with your bus. */

	if (ei_debug > 1)
	{
		/* DMA termination address check... */
		int addr, tries = 20;
		do {
			/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
			   -- it's broken for Rx on some cards! */
			int high = inb_p(nic_base + EN0_RSARHI);
			int low = inb_p(nic_base + EN0_RSARLO);
			addr = (high << 8) + low;
			if (((ring_offset + xfer_count) & 0xff) == low)
				break;
		} while (--tries > 0);
	 	if (tries <= 0)
			printk(KERN_WARNING "%s: RX transfer address mismatch,"
				"%#4.4x (expected) vs. %#4.4x (actual).\n",
				dev->name, ring_offset + xfer_count, addr);
	}
#endif
	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
}

static void ne_block_output(struct net_device *dev, int count,
		const unsigned char *buf, const int start_page)
{
	int nic_base = NE_BASE;
	unsigned long dma_start;
#ifdef NE_SANITY_CHECK
	int retries = 0;
#endif

	/* Round the count up for word writes.  Do we need to do this?
	   What effect will an odd byte count have on the 8390?
	   I should check someday. */

	if (ei_status.word16 && (count & 0x01))
		count++;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
			"[DMAstat:%d][irqlock:%d]\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	/* We should already be in page 0, but to be safe... */
	outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

#ifdef NE_SANITY_CHECK
retry:
#endif

#ifdef NE8390_RW_BUGFIX
	/* Handle the read-before-write bug the same way as the
	   Crynwr packet driver -- the NatSemi method doesn't work.
	   Actually this doesn't always work either, but if you have
	   problems with your NEx000 this is better than nothing! */

	outb_p(0x42, nic_base + EN0_RCNTLO);
	outb_p(0x00,   nic_base + EN0_RCNTHI);
	outb_p(0x42, nic_base + EN0_RSARLO);
	outb_p(0x00, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
	/* Make certain that the dummy read has occurred. */
	udelay(6);
#endif

	outb_p(ENISR_RDC, nic_base + EN0_ISR);

	/* Now the normal output. */
	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
	outb_p(count >> 8,   nic_base + EN0_RCNTHI);
	outb_p(0x00, nic_base + EN0_RSARLO);
	outb_p(start_page, nic_base + EN0_RSARHI);

	outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
	if (ei_status.word16) {
		outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
	} else {
		outsb(NE_BASE + NE_DATAPORT, buf, count);
	}

	dma_start = jiffies;

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here. */

	if (ei_debug > 1)
	{
		/* DMA termination address check... */
		int addr, tries = 20;
		do {
			int high = inb_p(nic_base + EN0_RSARHI);
			int low = inb_p(nic_base + EN0_RSARLO);
			addr = (high << 8) + low;
			if ((start_page << 8) + count == addr)
				break;
		} while (--tries > 0);

		if (tries <= 0)
		{
			printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
				"%#4.4x (expected) vs. %#4.4x (actual).\n",
				dev->name, (start_page << 8) + count, addr);
			if (retries++ == 0)
				goto retry;
		}
	}
#endif

	while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
		if (time_after(jiffies, dma_start + 2*HZ/100)) {		/* 20ms */
			printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
			ne_reset_8390(dev);
			NS8390p_init(dev, 1);
			break;
		}

	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
	return;
}

static int __init ne_drv_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	int err, this_dev = pdev->id;
	struct resource *res;

	dev = alloc_eip_netdev();
	if (!dev)
		return -ENOMEM;

	/* ne.c doesn't populate resources in platform_device, but
	 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
	 * with resources.
	 */
	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (res) {
		dev->base_addr = res->start;
		dev->irq = platform_get_irq(pdev, 0);
	} else {
		if (this_dev < 0 || this_dev >= MAX_NE_CARDS)
			return -EINVAL;
		dev->base_addr = io[this_dev];
		dev->irq = irq[this_dev];
		dev->mem_end = bad[this_dev];
	}
	err = do_ne_probe(dev);
	if (err) {
		free_netdev(dev);
		return err;
	}
	platform_set_drvdata(pdev, dev);

	/* Update with any values found by probing, don't update if
	 * resources were specified.
	 */
	if (!res) {
		io[this_dev] = dev->base_addr;
		irq[this_dev] = dev->irq;
	}
	return 0;
}

static int ne_drv_remove(struct platform_device *pdev)
{
	struct net_device *dev = platform_get_drvdata(pdev);

	if (dev) {
		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
		netif_device_detach(dev);
		unregister_netdev(dev);
		if (idev)
			pnp_device_detach(idev);
		/* Careful ne_drv_remove can be called twice, once from
		 * the platform_driver.remove and again when the
		 * platform_device is being removed.
		 */
		ei_status.priv = 0;
		free_irq(dev->irq, dev);
		release_region(dev->base_addr, NE_IO_EXTENT);
		free_netdev(dev);
		platform_set_drvdata(pdev, NULL);
	}
	return 0;
}

/* Remove unused devices or all if true. */
static void ne_loop_rm_unreg(int all)
{
	int this_dev;
	struct platform_device *pdev;
	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		pdev = pdev_ne[this_dev];
		/* No network device == unused */
		if (pdev && (!platform_get_drvdata(pdev) || all)) {
			ne_drv_remove(pdev);
			platform_device_unregister(pdev);
			pdev_ne[this_dev] = NULL;
		}
	}
}

#ifdef CONFIG_PM
static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct net_device *dev = platform_get_drvdata(pdev);

	if (netif_running(dev)) {
		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
		netif_device_detach(dev);
		if (idev)
			pnp_stop_dev(idev);
	}
	return 0;
}

static int ne_drv_resume(struct platform_device *pdev)
{
	struct net_device *dev = platform_get_drvdata(pdev);

	if (netif_running(dev)) {
		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
		if (idev)
			pnp_start_dev(idev);
		ne_reset_8390(dev);
		NS8390p_init(dev, 1);
		netif_device_attach(dev);
	}
	return 0;
}
#else
#define ne_drv_suspend NULL
#define ne_drv_resume NULL
#endif

static struct platform_driver ne_driver = {
	.remove		= ne_drv_remove,
	.suspend	= ne_drv_suspend,
	.resume		= ne_drv_resume,
	.driver		= {
		.name	= DRV_NAME,
		.owner	= THIS_MODULE,
	},
};

static void __init ne_add_devices(void)
{
	int this_dev;
	struct platform_device *pdev;

	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		if (pdev_ne[this_dev])
			continue;
		pdev = platform_device_register_simple(
			DRV_NAME, this_dev, NULL, 0);
		if (IS_ERR(pdev))
			continue;
		pdev_ne[this_dev] = pdev;
	}
}

#ifdef MODULE
int __init init_module(void)
{
	int retval;
	ne_add_devices();
	retval = platform_driver_probe(&ne_driver, ne_drv_probe);
	if (retval) {
		if (io[0] == 0)
			printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\""
				" value(s) for ISA cards.\n");
		ne_loop_rm_unreg(1);
		return retval;
	}

	/* Unregister unused platform_devices. */
	ne_loop_rm_unreg(0);
	return retval;
}
#else /* MODULE */
static int __init ne_init(void)
{
	int retval = platform_driver_probe(&ne_driver, ne_drv_probe);

	/* Unregister unused platform_devices. */
	ne_loop_rm_unreg(0);
	return retval;
}
module_init(ne_init);

struct net_device * __init ne_probe(int unit)
{
	int this_dev;
	struct net_device *dev;

	/* Find an empty slot, that is no net_device and zero io port. */
	this_dev = 0;
	while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
		io[this_dev]) {
		if (++this_dev == MAX_NE_CARDS)
			return ERR_PTR(-ENOMEM);
	}

	/* Get irq, io from kernel command line */
	dev = alloc_eip_netdev();
	if (!dev)
		return ERR_PTR(-ENOMEM);

	sprintf(dev->name, "eth%d", unit);
	netdev_boot_setup_check(dev);

	io[this_dev] = dev->base_addr;
	irq[this_dev] = dev->irq;
	bad[this_dev] = dev->mem_end;

	free_netdev(dev);

	ne_add_devices();

	/* return the first device found */
	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		if (pdev_ne[this_dev]) {
			dev = platform_get_drvdata(pdev_ne[this_dev]);
			if (dev)
				return dev;
		}
	}

	return ERR_PTR(-ENODEV);
}
#endif /* MODULE */

static void __exit ne_exit(void)
{
	platform_driver_unregister(&ne_driver);
	ne_loop_rm_unreg(1);
}
module_exit(ne_exit);