summaryrefslogtreecommitdiffstats
path: root/drivers/net/wd.c
blob: e629541c47462cec3855d9e87bbce24a6148e4b0 (plain)
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
/* wd.c: A WD80x3 ethernet driver for linux. */
/*
	Written 1993-94 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@CESDIS.gsfc.nasa.gov, or C/O
	Center of Excellence in Space Data and Information Sciences
	   Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771

	This is a driver for WD8003 and WD8013 "compatible" ethercards.

	Thanks to Russ Nelson (nelson@crnwyr.com) for loaning me a WD8013.

	Changelog:

	Paul Gortmaker	: multiple card support for module users, support
			  for non-standard memory sizes.


*/

static const char *version =
	"wd.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/system.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include "8390.h"

/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int wd_portlist[] __initdata =
{0x300, 0x280, 0x380, 0x240, 0};

int wd_probe(struct net_device *dev);
static int wd_probe1(struct net_device *dev, int ioaddr);

static int wd_open(struct net_device *dev);
static void wd_reset_8390(struct net_device *dev);
static void wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
						int ring_page);
static void wd_block_input(struct net_device *dev, int count,
						  struct sk_buff *skb, int ring_offset);
static void wd_block_output(struct net_device *dev, int count,
							const unsigned char *buf, int start_page);
static int wd_close(struct net_device *dev);


#define WD_START_PG		0x00	/* First page of TX buffer */
#define WD03_STOP_PG	0x20	/* Last page +1 of RX ring */
#define WD13_STOP_PG	0x40	/* Last page +1 of RX ring */

#define WD_CMDREG		0		/* Offset to ASIC command register. */
#define	 WD_RESET		0x80	/* Board reset, in WD_CMDREG. */
#define	 WD_MEMENB		0x40	/* Enable the shared memory. */
#define WD_CMDREG5		5		/* Offset to 16-bit-only ASIC register 5. */
#define	 ISA16			0x80	/* Enable 16 bit access from the ISA bus. */
#define	 NIC16			0x40	/* Enable 16 bit access from the 8390. */
#define WD_NIC_OFFSET	16		/* Offset to the 8390 from the base_addr. */
#define WD_IO_EXTENT	32


/*	Probe for the WD8003 and WD8013.  These cards have the station
	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
	following. A Soundblaster can have the same checksum as an WDethercard,
	so we have an extra exclusionary check for it.

	The wd_probe1() routine initializes the card and fills the
	station address field. */

int __init wd_probe(struct net_device *dev)
{
	int i;
	struct resource *r;
	int base_addr = dev->base_addr;

	SET_MODULE_OWNER(dev);

	if (base_addr > 0x1ff) {	/* Check a user specified location. */
		r = request_region(base_addr, WD_IO_EXTENT, "wd-probe");
		if ( r == NULL)
			return -EBUSY;
		i = wd_probe1(dev, base_addr);
		if (i != 0)  
			release_resource(r);
		else
			r->name = dev->name;
		return i;
	}
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

	for (i = 0; wd_portlist[i]; i++) {
		int ioaddr = wd_portlist[i];
		r = request_region(ioaddr, WD_IO_EXTENT, "wd-probe");
		if (r == NULL)
			continue;
		if (wd_probe1(dev, ioaddr) == 0) {
			r->name = dev->name;
			return 0;
		}
		release_resource(r);
	}

	return -ENODEV;
}

static int __init wd_probe1(struct net_device *dev, int ioaddr)
{
	int i;
	int checksum = 0;
	int ancient = 0;			/* An old card without config registers. */
	int word16 = 0;				/* 0 = 8 bit, 1 = 16 bit */
	const char *model_name;
	static unsigned version_printed = 0;

	for (i = 0; i < 8; i++)
		checksum += inb(ioaddr + 8 + i);
	if (inb(ioaddr + 8) == 0xff 	/* Extra check to avoid soundcard. */
		|| inb(ioaddr + 9) == 0xff
		|| (checksum & 0xff) != 0xFF)
		return -ENODEV;

	/* Check for semi-valid mem_start/end values if supplied. */
	if ((dev->mem_start % 0x2000) || (dev->mem_end % 0x2000)) {
		printk(KERN_WARNING "wd.c: user supplied mem_start or mem_end not on 8kB boundary - ignored.\n");
		dev->mem_start = 0;
		dev->mem_end = 0;
	}

	if (ei_debug  &&  version_printed++ == 0)
		printk(version);

	printk("%s: WD80x3 at %#3x,", dev->name, ioaddr);
	for (i = 0; i < 6; i++)
		printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));

	/* The following PureData probe code was contributed by
	   Mike Jagdis <jaggy@purplet.demon.co.uk>. Puredata does software
	   configuration differently from others so we have to check for them.
	   This detects an 8 bit, 16 bit or dumb (Toshiba, jumpered) card.
	   */
	if (inb(ioaddr+0) == 'P' && inb(ioaddr+1) == 'D') {
		unsigned char reg5 = inb(ioaddr+5);

		switch (inb(ioaddr+2)) {
		case 0x03: word16 = 0; model_name = "PDI8023-8";	break;
		case 0x05: word16 = 0; model_name = "PDUC8023";	break;
		case 0x0a: word16 = 1; model_name = "PDI8023-16"; break;
			/* Either 0x01 (dumb) or they've released a new version. */
		default:	 word16 = 0; model_name = "PDI8023";	break;
		}
		dev->mem_start = ((reg5 & 0x1c) + 0xc0) << 12;
		dev->irq = (reg5 & 0xe0) == 0xe0 ? 10 : (reg5 >> 5) + 1;
	} else {								/* End of PureData probe */
		/* This method of checking for a 16-bit board is borrowed from the
		   we.c driver.  A simpler method is just to look in ASIC reg. 0x03.
		   I'm comparing the two method in alpha test to make certain they
		   return the same result. */
		/* Check for the old 8 bit board - it has register 0/8 aliasing.
		   Do NOT check i>=6 here -- it hangs the old 8003 boards! */
		for (i = 0; i < 6; i++)
			if (inb(ioaddr+i) != inb(ioaddr+8+i))
				break;
		if (i >= 6) {
			ancient = 1;
			model_name = "WD8003-old";
			word16 = 0;
		} else {
			int tmp = inb(ioaddr+1); /* fiddle with 16bit bit */
			outb( tmp ^ 0x01, ioaddr+1 ); /* attempt to clear 16bit bit */
			if (((inb( ioaddr+1) & 0x01) == 0x01) /* A 16 bit card */
				&& (tmp & 0x01) == 0x01	) {				/* In a 16 slot. */
				int asic_reg5 = inb(ioaddr+WD_CMDREG5);
				/* Magic to set ASIC to word-wide mode. */
				outb( NIC16 | (asic_reg5&0x1f), ioaddr+WD_CMDREG5);
				outb(tmp, ioaddr+1);
				model_name = "WD8013";
				word16 = 1;		/* We have a 16bit board here! */
			} else {
				model_name = "WD8003";
				word16 = 0;
			}
			outb(tmp, ioaddr+1);			/* Restore original reg1 value. */
		}
#ifndef final_version
		if ( !ancient && (inb(ioaddr+1) & 0x01) != (word16 & 0x01))
			printk("\nWD80?3: Bus width conflict, %d (probe) != %d (reg report).",
				   word16 ? 16 : 8, (inb(ioaddr+1) & 0x01) ? 16 : 8);
#endif
	}

#if defined(WD_SHMEM) && WD_SHMEM > 0x80000
	/* Allow a compile-time override.	 */
	dev->mem_start = WD_SHMEM;
#else
	if (dev->mem_start == 0) {
		/* Sanity and old 8003 check */
		int reg0 = inb(ioaddr);
		if (reg0 == 0xff || reg0 == 0) {
			/* Future plan: this could check a few likely locations first. */
			dev->mem_start = 0xd0000;
			printk(" assigning address %#lx", dev->mem_start);
		} else {
			int high_addr_bits = inb(ioaddr+WD_CMDREG5) & 0x1f;
			/* Some boards don't have the register 5 -- it returns 0xff. */
			if (high_addr_bits == 0x1f || word16 == 0)
				high_addr_bits = 0x01;
			dev->mem_start = ((reg0&0x3f) << 13) + (high_addr_bits << 19);
		}
	}
#endif

	/* The 8390 isn't at the base address -- the ASIC regs are there! */
	dev->base_addr = ioaddr+WD_NIC_OFFSET;

	if (dev->irq < 2) {
		int irqmap[] = {9,3,5,7,10,11,15,4};
		int reg1 = inb(ioaddr+1);
		int reg4 = inb(ioaddr+4);
		if (ancient || reg1 == 0xff) {	/* Ack!! No way to read the IRQ! */
			short nic_addr = ioaddr+WD_NIC_OFFSET;

			/* We have an old-style ethercard that doesn't report its IRQ
			   line.  Do autoirq to find the IRQ line. Note that this IS NOT
			   a reliable way to trigger an interrupt. */
			outb_p(E8390_NODMA + E8390_STOP, nic_addr);
			outb(0x00, nic_addr+EN0_IMR);	/* Disable all intrs. */
			autoirq_setup(0);
			outb_p(0xff, nic_addr + EN0_IMR);	/* Enable all interrupts. */
			outb_p(0x00, nic_addr + EN0_RCNTLO);
			outb_p(0x00, nic_addr + EN0_RCNTHI);
			outb(E8390_RREAD+E8390_START, nic_addr); /* Trigger it... */
			dev->irq = autoirq_report(2);
			outb_p(0x00, nic_addr+EN0_IMR);	/* Mask all intrs. again. */

			if (ei_debug > 2)
				printk(" autoirq is %d", dev->irq);
			if (dev->irq < 2)
				dev->irq = word16 ? 10 : 5;
		} else
			dev->irq = irqmap[((reg4 >> 5) & 0x03) + (reg1 & 0x04)];
	} else if (dev->irq == 2)		/* Fixup bogosity: IRQ2 is really IRQ9 */
		dev->irq = 9;

	/* Allocate dev->priv and fill in 8390 specific dev fields. */
	if (ethdev_init(dev)) {
		printk (" unable to get memory for dev->priv.\n");
		return -ENOMEM;
	}

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

	/* OK, were are certain this is going to work.  Setup the device. */
	ei_status.name = model_name;
	ei_status.word16 = word16;
	ei_status.tx_start_page = WD_START_PG;
	ei_status.rx_start_page = WD_START_PG + TX_PAGES;

	/* Don't map in the shared memory until the board is actually opened. */
	dev->rmem_start = dev->mem_start + TX_PAGES*256;

	/* Some cards (eg WD8003EBT) can be jumpered for more (32k!) memory. */
	if (dev->mem_end != 0) {
		ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
	} else {
		ei_status.stop_page = word16 ? WD13_STOP_PG : WD03_STOP_PG;
		dev->mem_end = dev->mem_start + (ei_status.stop_page - WD_START_PG)*256;
	}
	dev->rmem_end = dev->mem_end;

	printk(" %s, IRQ %d, shared memory at %#lx-%#lx.\n",
		   model_name, dev->irq, dev->mem_start, dev->mem_end-1);

	ei_status.reset_8390 = &wd_reset_8390;
	ei_status.block_input = &wd_block_input;
	ei_status.block_output = &wd_block_output;
	ei_status.get_8390_hdr = &wd_get_8390_hdr;
	dev->open = &wd_open;
	dev->stop = &wd_close;
	NS8390_init(dev, 0);

#if 1
	/* Enable interrupt generation on softconfig cards -- M.U */
	/* .. but possibly potentially unsafe - Donald */
	if (inb(ioaddr+14) & 0x20)
		outb(inb(ioaddr+4)|0x80, ioaddr+4);
#endif

	return 0;
}

static int
wd_open(struct net_device *dev)
{
  int ioaddr = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */

  /* Map in the shared memory. Always set register 0 last to remain
	 compatible with very old boards. */
  ei_status.reg0 = ((dev->mem_start>>13) & 0x3f) | WD_MEMENB;
  ei_status.reg5 = ((dev->mem_start>>19) & 0x1f) | NIC16;

  if (ei_status.word16)
	  outb(ei_status.reg5, ioaddr+WD_CMDREG5);
  outb(ei_status.reg0, ioaddr); /* WD_CMDREG */

  ei_open(dev);
  return 0;
}

static void
wd_reset_8390(struct net_device *dev)
{
	int wd_cmd_port = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */

	outb(WD_RESET, wd_cmd_port);
	if (ei_debug > 1) printk("resetting the WD80x3 t=%lu...", jiffies);
	ei_status.txing = 0;

	/* Set up the ASIC registers, just in case something changed them. */
	outb((((dev->mem_start>>13) & 0x3f)|WD_MEMENB), wd_cmd_port);
	if (ei_status.word16)
		outb(NIC16 | ((dev->mem_start>>19) & 0x1f), wd_cmd_port+WD_CMDREG5);

	if (ei_debug > 1) printk("reset done\n");
	return;
}

/* 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
wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{

	int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
	unsigned long hdr_start = dev->mem_start + ((ring_page - WD_START_PG)<<8);

	/* We'll always get a 4 byte header read followed by a packet read, so
	   we enable 16 bit mode before the header, and disable after the body. */
	if (ei_status.word16)
		outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5);

#ifdef notdef
	/* Officially this is what we are doing, but the readl() is faster */
	isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
#else
	((unsigned int*)hdr)[0] = isa_readl(hdr_start);
#endif
}

/* Block input and output are easy on shared memory ethercards, and trivial
   on the Western digital card where there is no choice of how to do it.
   The only complications are that the ring buffer wraps, and need to map
   switch between 8- and 16-bit modes. */

static void
wd_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
	unsigned long xfer_start = dev->mem_start + ring_offset - (WD_START_PG<<8);

	if (xfer_start + count > dev->rmem_end) {
		/* We must wrap the input move. */
		int semi_count = dev->rmem_end - xfer_start;
		isa_memcpy_fromio(skb->data, xfer_start, semi_count);
		count -= semi_count;
		isa_memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
	} else {
		/* Packet is in one chunk -- we can copy + cksum. */
		isa_eth_io_copy_and_sum(skb, xfer_start, count, 0);
	}

	/* Turn off 16 bit access so that reboot works.	 ISA brain-damage */
	if (ei_status.word16)
		outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5);
}

static void
wd_block_output(struct net_device *dev, int count, const unsigned char *buf,
				int start_page)
{
	int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
	long shmem = dev->mem_start + ((start_page - WD_START_PG)<<8);


	if (ei_status.word16) {
		/* Turn on and off 16 bit access so that reboot works. */
		outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5);
		isa_memcpy_toio(shmem, buf, count);
		outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5);
	} else
		isa_memcpy_toio(shmem, buf, count);
}


static int
wd_close(struct net_device *dev)
{
	int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */

	if (ei_debug > 1)
		printk("%s: Shutting down ethercard.\n", dev->name);
	ei_close(dev);

	/* Change from 16-bit to 8-bit shared memory so reboot works. */
	if (ei_status.word16)
		outb(ei_status.reg5, wd_cmdreg + WD_CMDREG5 );

	/* And disable the shared memory. */
	outb(ei_status.reg0 & ~WD_MEMENB, wd_cmdreg);

	return 0;
}


#ifdef MODULE
#define MAX_WD_CARDS	4	/* Max number of wd cards per module */
static struct net_device dev_wd[MAX_WD_CARDS];
static int io[MAX_WD_CARDS];
static int irq[MAX_WD_CARDS];
static int mem[MAX_WD_CARDS];
static int mem_end[MAX_WD_CARDS];	/* for non std. mem size */

MODULE_PARM(io, "1-" __MODULE_STRING(MAX_WD_CARDS) "i");
MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_WD_CARDS) "i");
MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_WD_CARDS) "i");
MODULE_PARM(mem_end, "1-" __MODULE_STRING(MAX_WD_CARDS) "i");

/* This is set up so that only a single autoprobe takes place per call.
ISA device autoprobes on a running machine are not recommended. */
int
init_module(void)
{
	int this_dev, found = 0;

	for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) {
		struct net_device *dev = &dev_wd[this_dev];
		dev->irq = irq[this_dev];
		dev->base_addr = io[this_dev];
		dev->mem_start = mem[this_dev];
		dev->mem_end = mem_end[this_dev];
		dev->init = wd_probe;
		if (io[this_dev] == 0)  {
			if (this_dev != 0) break; /* only autoprobe 1st one */
			printk(KERN_NOTICE "wd.c: Presently autoprobing (not recommended) for a single card.\n");
		}
		if (register_netdev(dev) != 0) {
			printk(KERN_WARNING "wd.c: No wd80x3 card found (i/o = 0x%x).\n", io[this_dev]);
			if (found != 0) {	/* Got at least one. */
				return 0;
			}
			return -ENXIO;
		}
		found++;
	}
	return 0;
}

void
cleanup_module(void)
{
	int this_dev;

	for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) {
		struct net_device *dev = &dev_wd[this_dev];
		if (dev->priv != NULL) {
			void *priv = dev->priv;
			int ioaddr = dev->base_addr - WD_NIC_OFFSET;
			free_irq(dev->irq, dev);
			release_region(ioaddr, WD_IO_EXTENT);
			unregister_netdev(dev);
			kfree(priv);
		}
	}
}
#endif /* MODULE */


/*
 * Local variables:
 *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c wd.c"
 *  version-control: t
 *  tab-width: 4
 *  kept-new-versions: 5
 * End:
 */