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/* 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
    Paul Gortmaker      : multiple card support for module users.
25
    Paul Gortmaker      : Support for PCI ne2k clones, similar to lance.c
26
    Paul Gortmaker      : Allow users with bad cards to avoid full probe.
27
    Paul Gortmaker      : PCI probe changes, more PCI cards supported.
28
    rjohnson@analogic.com : Changed init order so an interrupt will only
29
    occur after memory is allocated for dev->priv. Deallocated memory
30
    last in cleanup_modue()
31
 
32
*/
33
 
34
/* Routines for the NatSemi-based designs (NE[12]000). */
35
 
36
static const char *version =
37
    "ne.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
38
 
39
 
40
#include <linux/module.h>
41
#include <linux/config.h>
42
#include <linux/kernel.h>
43
#include <linux/sched.h>
44
#include <linux/errno.h>
45
#include <linux/pci.h>
46
#include <linux/init.h>
47
#include <linux/delay.h>
48
#include <asm/system.h>
49
#include <asm/io.h>
50
 
51
#include <linux/netdevice.h>
52
#include <linux/etherdevice.h>
53
#include "8390.h"
54
 
55
/* Some defines that people can play with if so inclined. */
56
 
57
/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
58
#define SUPPORT_NE_BAD_CLONES
59
 
60
/* Do we perform extra sanity checks on stuff ? */
61
/* #define NE_SANITY_CHECK */
62
 
63
/* Do we implement the read before write bugfix ? */
64
/* #define NE_RW_BUGFIX */
65
 
66
/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
67
/* #define PACKETBUF_MEMSIZE    0x40 */
68
 
69
/* A zero-terminated list of I/O addresses to be probed at boot. */
70
#ifndef MODULE
71
static unsigned int netcard_portlist[] __initdata = {
72
        0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
73
};
74
#endif
75
 
76
#ifdef CONFIG_PCI
77
/* Ack! People are making PCI ne2000 clones! Oh the horror, the horror... */
78
static struct { unsigned short vendor, dev_id; char *name; }
79
pci_clone_list[] __initdata = {
80
        {PCI_VENDOR_ID_REALTEK,         PCI_DEVICE_ID_REALTEK_8029,             "Realtek 8029" },
81
        {PCI_VENDOR_ID_WINBOND2,        PCI_DEVICE_ID_WINBOND2_89C940,          "Winbond 89C940" },
82
        {PCI_VENDOR_ID_COMPEX,          PCI_DEVICE_ID_COMPEX_RL2000,            "Compex ReadyLink 2000" },
83
        {PCI_VENDOR_ID_KTI,             PCI_DEVICE_ID_KTI_ET32P2,               "KTI ET32P2" },
84
        {PCI_VENDOR_ID_NETVIN,          PCI_DEVICE_ID_NETVIN_NV5000SC,          "NetVin NV5000" },
85
        {PCI_VENDOR_ID_VIA,             PCI_DEVICE_ID_VIA_82C926,               "VIA 82C926 Amazon" },
86
        {PCI_VENDOR_ID_SURECOM,         PCI_DEVICE_ID_SURECOM_NE34,             "SureCom NE34"},
87
        {0,}
88
};
89
 
90
static int probe_pci = 1;
91
#endif
92
 
93
#ifdef SUPPORT_NE_BAD_CLONES
94
/* A list of bad clones that we none-the-less recognize. */
95
static struct { const char *name8, *name16; unsigned char SAprefix[4];}
96
bad_clone_list[] __initdata = {
97
    {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
98
    {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
99
    {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
100
    {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
101
    {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
102
    {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
103
    {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
104
    {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
105
    {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
106
    {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
107
    {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
108
    {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */    
109
    {0,}
110
};
111
#endif
112
 
113
/* ---- No user-serviceable parts below ---- */
114
 
115
#define NE_BASE  (dev->base_addr)
116
#define NE_CMD          0x00
117
#define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
118
#define NE_RESET        0x1f    /* Issue a read to reset, a write to clear. */
119
#define NE_IO_EXTENT    0x20
120
 
121
#define NE1SM_START_PG  0x20    /* First page of TX buffer */
122
#define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
123
#define NESM_START_PG   0x40    /* First page of TX buffer */
124
#define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
125
 
126
/* Non-zero only if the current card is a PCI with BIOS-set IRQ. */
127
static unsigned int pci_irq_line = 0;
128
 
129
int ne_probe(struct device *dev);
130
static int ne_probe1(struct device *dev, int ioaddr);
131
#ifdef CONFIG_PCI
132
static int ne_probe_pci(struct device *dev);
133
#endif
134
 
135
static int ne_open(struct device *dev);
136
static int ne_close(struct device *dev);
137
 
138
static void ne_reset_8390(struct device *dev);
139
static void ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
140
                          int ring_page);
141
static void ne_block_input(struct device *dev, int count,
142
                          struct sk_buff *skb, int ring_offset);
143
static void ne_block_output(struct device *dev, const int count,
144
                const unsigned char *buf, const int start_page);
145
 
146
 
147
/*  Probe for various non-shared-memory ethercards.
148
 
149
   NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
150
   buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
151
   the SAPROM, while other supposed NE2000 clones must be detected by their
152
   SA prefix.
153
 
154
   Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
155
   mode results in doubled values, which can be detected and compensated for.
156
 
157
   The probe is also responsible for initializing the card and filling
158
   in the 'dev' and 'ei_status' structures.
159
 
160
   We use the minimum memory size for some ethercard product lines, iff we can't
161
   distinguish models.  You can increase the packet buffer size by setting
162
   PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
163
        E1010   starts at 0x100 and ends at 0x2000.
164
        E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
165
        E2010    starts at 0x100 and ends at 0x4000.
166
        E2010-x starts at 0x100 and ends at 0xffff.  */
167
 
168
#ifdef HAVE_DEVLIST
169
struct netdev_entry netcard_drv =
170
{"ne", ne_probe1, NE_IO_EXTENT, netcard_portlist};
171
#else
172
 
173
/*
174
 * Note that at boot, this probe only picks up one card at a time, even for
175
 * multiple PCI ne2k cards. Use "ether=0,0,eth1" if you have a second PCI
176
 * ne2k card.  This keeps things consistent regardless of the bus type of
177
 * the card.
178
 */
179
 
180
__initfunc(int ne_probe(struct device *dev))
181
{
182
        int base_addr = dev ? dev->base_addr : 0;
183
 
184
        /* First check any supplied i/o locations. User knows best. <cough> */
185
        if (base_addr > 0x1ff)  /* Check a single specified location. */
186
                return ne_probe1(dev, base_addr);
187
        else if (base_addr != 0)        /* Don't probe at all. */
188
                return ENXIO;
189
 
190
#ifdef CONFIG_PCI
191
        /* Then look for any installed PCI clones */
192
        if (probe_pci && pci_present() && (ne_probe_pci(dev) == 0))
193
                return 0;
194
#endif
195
 
196
#ifndef MODULE
197
        /* Last resort. The semi-risky ISA auto-probe. */
198
        for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
199
                int ioaddr = netcard_portlist[base_addr];
200
                if (check_region(ioaddr, NE_IO_EXTENT))
201
                        continue;
202
                if (ne_probe1(dev, ioaddr) == 0)
203
                        return 0;
204
        }
205
#endif
206
 
207
        return ENODEV;
208
}
209
#endif
210
 
211
#ifdef CONFIG_PCI
212
__initfunc(static int ne_probe_pci(struct device *dev))
213
{
214
        int i;
215
 
216
        for (i = 0; pci_clone_list[i].vendor != 0; i++) {
217
                struct pci_dev *pdev = NULL;
218
                unsigned int pci_ioaddr;
219
 
220
                while ((pdev = pci_find_device(pci_clone_list[i].vendor, pci_clone_list[i].dev_id, pdev))) {
221
                        pci_ioaddr = pdev->base_address[0] & PCI_BASE_ADDRESS_IO_MASK;
222
                        /* Avoid already found cards from previous calls */
223
                        if (check_region(pci_ioaddr, NE_IO_EXTENT))
224
                                continue;
225
                        pci_irq_line = pdev->irq;
226
                        if (pci_irq_line) break;        /* Found it */
227
                }
228
                if (!pdev)
229
                        continue;
17 pj 230
                printk(KERN_INFO "ne.c: PCI BIOS reports %s at i/o %x, irq %d.\n",
2 pj 231
                                pci_clone_list[i].name,
232
                                pci_ioaddr, pci_irq_line);
233
                printk("*\n* Use of the PCI-NE2000 driver with this card is recommended!\n*\n");
234
                if (ne_probe1(dev, pci_ioaddr) != 0) {  /* Shouldn't happen. */
17 pj 235
                        printk(KERN_ERR "ne.c: Probe of PCI card at %x failed.\n", pci_ioaddr);
2 pj 236
                        pci_irq_line = 0;
237
                        return -ENXIO;
238
                }
239
                pci_irq_line = 0;
240
                return 0;
241
        }
242
        return -ENODEV;
243
}
244
#endif  /* CONFIG_PCI */
245
 
246
__initfunc(static int ne_probe1(struct device *dev, int ioaddr))
247
{
248
        int i;
249
        unsigned char SA_prom[32];
250
        int wordlength = 2;
251
        const char *name = NULL;
252
        int start_page, stop_page;
253
        int neX000, ctron, copam, bad_card;
254
        int reg0 = inb_p(ioaddr);
255
        static unsigned version_printed = 0;
256
 
257
        if (reg0 == 0xFF)
258
                return ENODEV;
259
 
260
        /* Do a preliminary verification that we have a 8390. */
261
        {
262
                int regd;
263
                outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
264
                regd = inb_p(ioaddr + 0x0d);
265
                outb_p(0xff, ioaddr + 0x0d);
266
                outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
267
                inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
268
                if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
269
                        outb_p(reg0, ioaddr);
270
                        outb_p(regd, ioaddr + 0x0d);    /* Restore the old values. */
271
                        return ENODEV;
272
                }
273
        }
274
 
275
        if (load_8390_module("ne.c"))
276
                return -ENOSYS;
277
 
278
        /* We should have a "dev" from Space.c or the static module table. */
279
        if (dev == NULL)
280
        {
281
                printk(KERN_ERR "ne.c: Passed a NULL device.\n");
282
                dev = init_etherdev(0, 0);
283
        }
284
 
285
        if (ei_debug  &&  version_printed++ == 0)
286
                printk(version);
287
 
17 pj 288
        printk(KERN_INFO "NE*000 ethercard probe at %3x:", ioaddr);
2 pj 289
 
290
        /* A user with a poor card that fails to ack the reset, or that
291
           does not have a valid 0x57,0x57 signature can still use this
292
           without having to recompile. Specifying an i/o address along
293
           with an otherwise unused dev->mem_end value of "0xBAD" will
294
           cause the driver to skip these parts of the probe. */
295
 
296
        bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
297
 
298
        /* Reset card. Who knows what dain-bramaged state it was left in. */
299
 
300
        {
301
                unsigned long reset_start_time = jiffies;
302
 
303
                /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
304
                outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
305
 
306
                while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
307
                if (jiffies - reset_start_time > 2*HZ/100) {
308
                        if (bad_card) {
309
                                printk(" (warning: no reset ack)");
310
                                break;
311
                        } else {
312
                                printk(" not found (no reset ack).\n");
313
                                return ENODEV;
314
                        }
315
                }
316
 
317
                outb_p(0xff, ioaddr + EN0_ISR);         /* Ack all intr. */
318
        }
319
 
320
        /* Read the 16 bytes of station address PROM.
321
           We must first initialize registers, similar to NS8390_init(eifdev, 0).
322
           We can't reliably read the SAPROM address without this.
323
           (I learned the hard way!). */
324
        {
325
                struct {unsigned char value, offset; } program_seq[] =
326
                {
327
                        {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
328
                        {0x48,  EN0_DCFG},      /* Set byte-wide (0x48) access. */
329
                        {0x00,  EN0_RCNTLO},    /* Clear the count regs. */
330
                        {0x00,  EN0_RCNTHI},
331
                        {0x00,  EN0_IMR},       /* Mask completion irq. */
332
                        {0xFF,  EN0_ISR},
333
                        {E8390_RXOFF, EN0_RXCR},        /* 0x20  Set to monitor */
334
                        {E8390_TXOFF, EN0_TXCR},        /* 0x02  and loopback mode. */
335
                        {32,    EN0_RCNTLO},
336
                        {0x00,  EN0_RCNTHI},
337
                        {0x00,  EN0_RSARLO},    /* DMA starting at 0x0000. */
338
                        {0x00,  EN0_RSARHI},
339
                        {E8390_RREAD+E8390_START, E8390_CMD},
340
                };
341
 
342
                for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
343
                        outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
344
 
345
        }
346
        for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
347
                SA_prom[i] = inb(ioaddr + NE_DATAPORT);
348
                SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
349
                if (SA_prom[i] != SA_prom[i+1])
350
                        wordlength = 1;
351
        }
352
 
353
        /* At this point, wordlength *only* tells us if the SA_prom is doubled
354
           up or not because some broken PCI cards don't respect the byte-wide
355
           request in program_seq above, and hence don't have doubled up values.
356
           These broken cards would otherwise be detected as an ne1000.  */
357
 
358
        if (wordlength == 2)
359
                for (i = 0; i < 16; i++)
360
                        SA_prom[i] = SA_prom[i+i];
361
 
362
        if (pci_irq_line || ioaddr >= 0x400)
363
                wordlength = 2;         /* Catch broken PCI cards mentioned above. */
364
 
365
        if (wordlength == 2)
366
        {
367
                /* We must set the 8390 for word mode. */
368
                outb_p(0x49, ioaddr + EN0_DCFG);
369
                start_page = NESM_START_PG;
370
                stop_page = NESM_STOP_PG;
371
        } else {
372
                start_page = NE1SM_START_PG;
373
                stop_page = NE1SM_STOP_PG;
374
        }
375
 
376
        neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
377
        ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
378
        copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
379
 
380
 
381
        /* Set up the rest of the parameters. */
382
        if (neX000 || bad_card || copam) {
383
                name = (wordlength == 2) ? "NE2000" : "NE1000";
384
        }
385
        else if (ctron)
386
        {
387
                name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
388
                start_page = 0x01;
389
                stop_page = (wordlength == 2) ? 0x40 : 0x20;
390
        }
391
        else
392
        {
393
#ifdef SUPPORT_NE_BAD_CLONES
394
                /* Ack!  Well, there might be a *bad* NE*000 clone there.
395
                   Check for total bogus addresses. */
396
                for (i = 0; bad_clone_list[i].name8; i++)
397
                {
398
                        if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
399
                                SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
400
                                SA_prom[2] == bad_clone_list[i].SAprefix[2])
401
                        {
402
                                if (wordlength == 2)
403
                                {
404
                                        name = bad_clone_list[i].name16;
405
                                } else {
406
                                        name = bad_clone_list[i].name8;
407
                                }
408
                                break;
409
                        }
410
                }
411
                if (bad_clone_list[i].name8 == NULL)
412
                {
413
                        printk(" not found (invalid signature %2.2x %2.2x).\n",
414
                                SA_prom[14], SA_prom[15]);
415
                        return ENXIO;
416
                }
417
#else
418
                printk(" not found.\n");
419
                return ENXIO;
420
#endif
421
        }
422
 
423
        if (pci_irq_line)
424
                dev->irq = pci_irq_line;
425
 
426
        if (dev->irq < 2)
427
        {
428
                autoirq_setup(0);
429
                outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
430
                outb_p(0x00, ioaddr + EN0_RCNTLO);
431
                outb_p(0x00, ioaddr + EN0_RCNTHI);
432
                outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
433
                mdelay(10);             /* wait 10ms for interrupt to propagate */
434
                outb_p(0x00, ioaddr + EN0_IMR);                 /* Mask it again. */
435
                dev->irq = autoirq_report(0);
436
                if (ei_debug > 2)
437
                        printk(" autoirq is %d\n", dev->irq);
438
        } else if (dev->irq == 2)
439
                /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
440
                   or don't know which one to set. */
441
                dev->irq = 9;
442
 
443
        if (! dev->irq) {
444
                printk(" failed to detect IRQ line.\n");
445
                return EAGAIN;
446
        }
447
 
448
        /* Allocate dev->priv and fill in 8390 specific dev fields. */
449
        if (ethdev_init(dev))
450
        {
451
                printk (" unable to get memory for dev->priv.\n");
452
                return -ENOMEM;
453
        }
454
 
455
        /* Snarf the interrupt now.  There's no point in waiting since we cannot
456
           share and the board will usually be enabled. */
457
 
458
        {
459
                int irqval = request_irq(dev->irq, ei_interrupt,
460
                                 pci_irq_line ? SA_SHIRQ : 0, name, dev);
461
                if (irqval) {
462
                        printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval);
463
                        kfree(dev->priv);
464
                        dev->priv = NULL;
465
                        return EAGAIN;
466
                }
467
        }
468
        dev->base_addr = ioaddr;
469
        request_region(ioaddr, NE_IO_EXTENT, name);
470
 
471
        for(i = 0; i < ETHER_ADDR_LEN; i++) {
472
                printk(" %2.2x", SA_prom[i]);
473
                dev->dev_addr[i] = SA_prom[i];
474
        }
475
 
17 pj 476
        printk("\n%s: %s found at %x, using IRQ %d.\n",
2 pj 477
                dev->name, name, ioaddr, dev->irq);
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 = (wordlength == 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
        dev->open = &ne_open;
495
        dev->stop = &ne_close;
496
        NS8390_init(dev, 0);
497
        return 0;
498
}
499
 
500
static int ne_open(struct device *dev)
501
{
502
        ei_open(dev);
503
        MOD_INC_USE_COUNT;
504
        return 0;
505
}
506
 
507
static int ne_close(struct device *dev)
508
{
509
        if (ei_debug > 1)
510
                printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
511
        ei_close(dev);
512
        MOD_DEC_USE_COUNT;
513
        return 0;
514
}
515
 
516
/* Hard reset the card.  This used to pause for the same period that a
517
   8390 reset command required, but that shouldn't be necessary. */
518
 
519
static void ne_reset_8390(struct device *dev)
520
{
521
        unsigned long reset_start_time = jiffies;
522
 
523
        if (ei_debug > 1)
524
                printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
525
 
526
        /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
527
        outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
528
 
529
        ei_status.txing = 0;
530
        ei_status.dmaing = 0;
531
 
532
        /* This check _should_not_ be necessary, omit eventually. */
533
        while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
534
                if (jiffies - reset_start_time > 2*HZ/100) {
535
                        printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
536
                        break;
537
                }
538
        outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
539
}
540
 
541
/* Grab the 8390 specific header. Similar to the block_input routine, but
542
   we don't need to be concerned with ring wrap as the header will be at
543
   the start of a page, so we optimize accordingly. */
544
 
545
static void ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
546
{
547
        int nic_base = dev->base_addr;
548
 
549
        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
550
 
551
        if (ei_status.dmaing)
552
        {
553
                printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
554
                        "[DMAstat:%d][irqlock:%d][intr:%ld].\n",
555
                        dev->name, ei_status.dmaing, ei_status.irqlock,
556
                        dev->interrupt);
557
                return;
558
        }
559
 
560
        ei_status.dmaing |= 0x01;
561
        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
562
        outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
563
        outb_p(0, nic_base + EN0_RCNTHI);
564
        outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
565
        outb_p(ring_page, nic_base + EN0_RSARHI);
566
        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
567
 
568
        if (ei_status.word16)
569
                insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
570
        else
571
                insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
572
 
573
        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
574
        ei_status.dmaing &= ~0x01;
575
}
576
 
577
/* Block input and output, similar to the Crynwr packet driver.  If you
578
   are porting to a new ethercard, look at the packet driver source for hints.
579
   The NEx000 doesn't share the on-board packet memory -- you have to put
580
   the packet out through the "remote DMA" dataport using outb. */
581
 
582
static void ne_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
583
{
584
#ifdef NE_SANITY_CHECK
585
        int xfer_count = count;
586
#endif
587
        int nic_base = dev->base_addr;
588
        char *buf = skb->data;
589
 
590
        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
591
        if (ei_status.dmaing)
592
        {
593
                printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
594
                        "[DMAstat:%d][irqlock:%d][intr:%ld].\n",
595
                        dev->name, ei_status.dmaing, ei_status.irqlock,
596
                        dev->interrupt);
597
                return;
598
        }
599
        ei_status.dmaing |= 0x01;
600
        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
601
        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
602
        outb_p(count >> 8, nic_base + EN0_RCNTHI);
603
        outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
604
        outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
605
        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
606
        if (ei_status.word16)
607
        {
608
                insw(NE_BASE + NE_DATAPORT,buf,count>>1);
609
                if (count & 0x01)
610
                {
611
                        buf[count-1] = inb(NE_BASE + NE_DATAPORT);
612
#ifdef NE_SANITY_CHECK
613
                        xfer_count++;
614
#endif
615
                }
616
        } else {
617
                insb(NE_BASE + NE_DATAPORT, buf, count);
618
        }
619
 
620
#ifdef NE_SANITY_CHECK
621
        /* This was for the ALPHA version only, but enough people have
622
           been encountering problems so it is still here.  If you see
623
           this message you either 1) have a slightly incompatible clone
624
           or 2) have noise/speed problems with your bus. */
625
 
626
        if (ei_debug > 1)
627
        {
628
                /* DMA termination address check... */
629
                int addr, tries = 20;
630
                do {
631
                        /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
632
                           -- it's broken for Rx on some cards! */
633
                        int high = inb_p(nic_base + EN0_RSARHI);
634
                        int low = inb_p(nic_base + EN0_RSARLO);
635
                        addr = (high << 8) + low;
636
                        if (((ring_offset + xfer_count) & 0xff) == low)
637
                                break;
638
                } while (--tries > 0);
639
                if (tries <= 0)
640
                        printk(KERN_WARNING "%s: RX transfer address mismatch,"
17 pj 641
                                "%4.4x (expected) vs. %4.4x (actual).\n",
2 pj 642
                                dev->name, ring_offset + xfer_count, addr);
643
        }
644
#endif
645
        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
646
        ei_status.dmaing &= ~0x01;
647
}
648
 
649
static void ne_block_output(struct device *dev, int count,
650
                const unsigned char *buf, const int start_page)
651
{
652
        int nic_base = NE_BASE;
653
        unsigned long dma_start;
654
#ifdef NE_SANITY_CHECK
655
        int retries = 0;
656
#endif
657
 
658
        /* Round the count up for word writes.  Do we need to do this?
659
           What effect will an odd byte count have on the 8390?
660
           I should check someday. */
661
 
662
        if (ei_status.word16 && (count & 0x01))
663
                count++;
664
 
665
        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
666
        if (ei_status.dmaing)
667
        {
668
                printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
669
                        "[DMAstat:%d][irqlock:%d][intr:%ld]\n",
670
                        dev->name, ei_status.dmaing, ei_status.irqlock,
671
                        dev->interrupt);
672
                return;
673
        }
674
        ei_status.dmaing |= 0x01;
675
        /* We should already be in page 0, but to be safe... */
676
        outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
677
 
678
#ifdef NE_SANITY_CHECK
679
retry:
680
#endif
681
 
682
#ifdef NE8390_RW_BUGFIX
683
        /* Handle the read-before-write bug the same way as the
684
           Crynwr packet driver -- the NatSemi method doesn't work.
685
           Actually this doesn't always work either, but if you have
686
           problems with your NEx000 this is better than nothing! */
687
 
688
        outb_p(0x42, nic_base + EN0_RCNTLO);
689
        outb_p(0x00,   nic_base + EN0_RCNTHI);
690
        outb_p(0x42, nic_base + EN0_RSARLO);
691
        outb_p(0x00, nic_base + EN0_RSARHI);
692
        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
693
        /* Make certain that the dummy read has occurred. */
694
        udelay(6);
695
#endif
696
 
697
        outb_p(ENISR_RDC, nic_base + EN0_ISR);
698
 
699
        /* Now the normal output. */
700
        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
701
        outb_p(count >> 8,   nic_base + EN0_RCNTHI);
702
        outb_p(0x00, nic_base + EN0_RSARLO);
703
        outb_p(start_page, nic_base + EN0_RSARHI);
704
 
705
        outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
706
        if (ei_status.word16) {
707
                outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
708
        } else {
709
                outsb(NE_BASE + NE_DATAPORT, buf, count);
710
        }
711
 
712
        dma_start = jiffies;
713
 
714
#ifdef NE_SANITY_CHECK
715
        /* This was for the ALPHA version only, but enough people have
716
           been encountering problems so it is still here. */
717
 
718
        if (ei_debug > 1)
719
        {
720
                /* DMA termination address check... */
721
                int addr, tries = 20;
722
                do {
723
                        int high = inb_p(nic_base + EN0_RSARHI);
724
                        int low = inb_p(nic_base + EN0_RSARLO);
725
                        addr = (high << 8) + low;
726
                        if ((start_page << 8) + count == addr)
727
                                break;
728
                } while (--tries > 0);
729
 
730
                if (tries <= 0)
731
                {
732
                        printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
733
                                "%#4.4x (expected) vs. %#4.4x (actual).\n",
734
                                dev->name, (start_page << 8) + count, addr);
735
                        if (retries++ == 0)
736
                                goto retry;
737
                }
738
        }
739
#endif
740
 
741
        while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
742
                if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
743
                        printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
744
                        ne_reset_8390(dev);
745
                        NS8390_init(dev,1);
746
                        break;
747
                }
748
 
749
        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
750
        ei_status.dmaing &= ~0x01;
751
        return;
752
}
753
 
754
 
755
#ifdef MODULE
756
#define MAX_NE_CARDS    4       /* Max number of NE cards per module */
757
#define NAMELEN         8       /* # of chars for storing dev->name */
758
static char namelist[NAMELEN * MAX_NE_CARDS] = { 0, };
759
static struct device dev_ne[MAX_NE_CARDS] = {
760
        {
761
                NULL,           /* assign a chunk of namelist[] below */
762
                0, 0, 0, 0,
763
                0, 0,
764
                0, 0, 0, NULL, NULL
765
        },
766
};
767
 
768
static int io[MAX_NE_CARDS] = { 0, };
769
static int irq[MAX_NE_CARDS]  = { 0, };
770
static int bad[MAX_NE_CARDS]  = { 0, }; /* 0xbad = bad sig or no reset ack */
771
 
772
MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
773
MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
774
MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
775
 
776
#ifdef CONFIG_PCI
777
MODULE_PARM(probe_pci, "i");
778
#endif
779
 
780
/* This is set up so that no ISA autoprobe takes place. We can't guarantee
781
that the ne2k probe is the last 8390 based probe to take place (as it
782
is at boot) and so the probe will get confused by any other 8390 cards.
783
ISA device autoprobes on a running machine are not recommended anyway. */
784
 
785
int init_module(void)
786
{
787
        int this_dev, found = 0;
788
 
789
        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
790
                struct device *dev = &dev_ne[this_dev];
791
                dev->name = namelist+(NAMELEN*this_dev);
792
                dev->irq = irq[this_dev];
793
                dev->mem_end = bad[this_dev];
794
                dev->base_addr = io[this_dev];
795
                dev->init = ne_probe;
796
                if (register_netdev(dev) == 0) {
797
                        found++;
798
                        continue;
799
                }
800
                if (found != 0) {       /* Got at least one. */
801
                        lock_8390_module();
802
                        return 0;
803
                }
804
                if (io[this_dev] != 0)
805
                        printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
806
                else
807
                        printk(KERN_NOTICE "ne.c: No PCI cards found. Use \"io=0xNNN\" value(s) for ISA cards.\n");
808
                return -ENXIO;
809
        }
810
        lock_8390_module();
811
        return 0;
812
}
813
 
814
void cleanup_module(void)
815
{
816
        int this_dev;
817
 
818
        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
819
                struct device *dev = &dev_ne[this_dev];
820
                if (dev->priv != NULL) {
821
                        void *priv = dev->priv;
822
                        free_irq(dev->irq, dev);
823
                        release_region(dev->base_addr, NE_IO_EXTENT);
824
                        unregister_netdev(dev);
825
                        kfree(priv);
826
                }
827
        }
828
        unlock_8390_module();
829
}
830
#endif /* MODULE */
831
 
832
/*
833
 * Local variables:
834
 *  compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c"
835
 *  version-control: t
836
 *  kept-new-versions: 5
837
 * End:
838
 */