Free Electrons

Embedded Linux Experts

  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
/* smc-mca.c: A SMC Ultra ethernet driver for linux. */
/*
    Most of this driver, except for ultramca_probe is nearly
    verbatim from smc-ultra.c by Donald Becker. The rest is
    written and copyright 1996 by David Weis, weisd3458@uni.edu

    This is a driver for the SMC Ultra and SMC EtherEZ ethercards.

    This driver uses the cards in the 8390-compatible, shared memory mode.
    Most of the run-time complexity is handled by the generic code in
    8390.c.

    This driver enables the shared memory only when doing the actual data
    transfers to avoid a bug in early version of the card that corrupted
    data transferred by a AHA1542.

    This driver does not support the programmed-I/O data transfer mode of
    the EtherEZ.  That support (if available) is smc-ez.c.  Nor does it
    use the non-8390-compatible "Altego" mode. (No support currently planned.)

    Changelog:

    Paul Gortmaker	 : multiple card support for module users.
    David Weis		 : Micro Channel-ized it.
    Tom Sightler	 : Added support for IBM PS/2 Ethernet Adapter/A
    Christopher Turcksin : Changed MCA-probe so that multiple adapters are
			   found correctly (Jul 16, 1997)
    Chris Beauregard	 : Tried to merge the two changes above (Dec 15, 1997)
    Tom Sightler	 : Fixed minor detection bug caused by above merge
    Tom Sightler	 : Added support for three more Western Digital
			   MCA-adapters
    Tom Sightler	 : Added support for 2.2.x mca_find_unused_adapter
    Hartmut Schmidt	 : - Modified parameter detection to handle each
			     card differently depending on a switch-list
			   - 'card_ver' removed from the adapter list
			   - Some minor bug fixes
*/

#include <linux/mca.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>

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

#include "8390.h"

#define DRV_NAME "smc-mca"

static int ultramca_open(struct net_device *dev);
static void ultramca_reset_8390(struct net_device *dev);
static void ultramca_get_8390_hdr(struct net_device *dev,
                                  struct e8390_pkt_hdr *hdr,
                                  int ring_page);
static void ultramca_block_input(struct net_device *dev, int count,
                                 struct sk_buff *skb,
                                 int ring_offset);
static void ultramca_block_output(struct net_device *dev, int count,
                                  const unsigned char *buf,
                                  const int start_page);
static int ultramca_close_card(struct net_device *dev);

#define START_PG        0x00    /* First page of TX buffer */

#define ULTRA_CMDREG 0      /* Offset to ASIC command register. */
#define ULTRA_RESET  0x80   /* Board reset, in ULTRA_CMDREG. */
#define ULTRA_MEMENB 0x40   /* Enable the shared memory. */
#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
#define ULTRA_IO_EXTENT 32
#define EN0_ERWCNT      0x08  /* Early receive warning count. */

#define _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A            0
#define _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A            1
#define _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A              2
#define _6fc1_WD_Starcard_PLUS_A_WD8003ST_A                            3
#define _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A                        4
#define _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A        5
#define _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A        6
#define _efe5_IBM_PS2_Adapter_A_for_Ethernet                           7

struct smc_mca_adapters_t {
	unsigned int id;
	char *name;
};

#define MAX_ULTRAMCA_CARDS 4	/* Max number of Ultra cards per module */

static int ultra_io[MAX_ULTRAMCA_CARDS];
static int ultra_irq[MAX_ULTRAMCA_CARDS];
MODULE_LICENSE("GPL");

module_param_array(ultra_io, int, NULL, 0);
module_param_array(ultra_irq, int, NULL, 0);
MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");

static const struct {
  unsigned int base_addr;
} addr_table[] = {
    { 0x0800 },
    { 0x1800 },
    { 0x2800 },
    { 0x3800 },
    { 0x4800 },
    { 0x5800 },
    { 0x6800 },
    { 0x7800 },
    { 0x8800 },
    { 0x9800 },
    { 0xa800 },
    { 0xb800 },
    { 0xc800 },
    { 0xd800 },
    { 0xe800 },
    { 0xf800 }
};

#define MEM_MASK 64

static const struct {
  unsigned char mem_index;
  unsigned long mem_start;
  unsigned char num_pages;
} mem_table[] = {
    { 16, 0x0c0000, 40 },
    { 18, 0x0c4000, 40 },
    { 20, 0x0c8000, 40 },
    { 22, 0x0cc000, 40 },
    { 24, 0x0d0000, 40 },
    { 26, 0x0d4000, 40 },
    { 28, 0x0d8000, 40 },
    { 30, 0x0dc000, 40 },
    {144, 0xfc0000, 40 },
    {148, 0xfc8000, 40 },
    {154, 0xfd0000, 40 },
    {156, 0xfd8000, 40 },
    {  0, 0x0c0000, 20 },
    {  1, 0x0c2000, 20 },
    {  2, 0x0c4000, 20 },
    {  3, 0x0c6000, 20 }
};

#define IRQ_MASK 243
static const struct {
   unsigned char new_irq;
   unsigned char old_irq;
} irq_table[] = {
   {  3,  3 },
   {  4,  4 },
   { 10, 10 },
   { 14, 15 }
};

static short smc_mca_adapter_ids[] __initdata = {
	0x61c8,
	0x61c9,
	0x6fc0,
	0x6fc1,
	0x6fc2,
	0xefd4,
	0xefd5,
	0xefe5,
	0x0000
};

static char *smc_mca_adapter_names[] __initdata = {
	"SMC Ethercard PLUS Elite/A BNC/AUI (WD8013EP/A)",
	"SMC Ethercard PLUS Elite/A UTP/AUI (WD8013WP/A)",
	"WD Ethercard PLUS/A (WD8003E/A or WD8003ET/A)",
	"WD Starcard PLUS/A (WD8003ST/A)",
	"WD Ethercard PLUS 10T/A (WD8003W/A)",
	"IBM PS/2 Adapter/A for Ethernet UTP/AUI (WD8013WP/A)",
	"IBM PS/2 Adapter/A for Ethernet BNC/AUI (WD8013EP/A)",
	"IBM PS/2 Adapter/A for Ethernet",
	NULL
};

static int ultra_found = 0;


static const struct net_device_ops ultramca_netdev_ops = {
	.ndo_open		= ultramca_open,
	.ndo_stop		= ultramca_close_card,

	.ndo_start_xmit		= ei_start_xmit,
	.ndo_tx_timeout		= ei_tx_timeout,
	.ndo_get_stats		= ei_get_stats,
	.ndo_set_multicast_list = ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_change_mtu		= eth_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller 	= ei_poll,
#endif
};

static int __init ultramca_probe(struct device *gen_dev)
{
	unsigned short ioaddr;
	struct net_device *dev;
	unsigned char reg4, num_pages;
	struct mca_device *mca_dev = to_mca_device(gen_dev);
	char slot = mca_dev->slot;
	unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
	int i, rc;
	int adapter = mca_dev->index;
	int tbase = 0;
	int tirq = 0;
	int base_addr = ultra_io[ultra_found];
	int irq = ultra_irq[ultra_found];

	if (base_addr || irq) {
		printk(KERN_INFO "Probing for SMC MCA adapter");
		if (base_addr) {
			printk(KERN_INFO " at I/O address 0x%04x%c",
			       base_addr, irq ? ' ' : '\n');
		}
		if (irq) {
			printk(KERN_INFO "using irq %d\n", irq);
		}
	}

	tirq = 0;
	tbase = 0;

	/* If we're trying to match a specificied irq or io address,
	 * we'll reject the adapter found unless it's the one we're
	 * looking for */

	pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
	pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
	pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
	pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */

	/* Test the following conditions:
	 * - If an irq parameter is supplied, compare it
	 *   with the irq of the adapter we found
	 * - If a base_addr paramater is given, compare it
	 *   with the base_addr of the adapter we found
	 * - Check that the irq and the base_addr of the
	 *   adapter we found is not already in use by
	 *   this driver
	 */

	switch (mca_dev->index) {
	case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
	case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
	case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
	case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
		{
			tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
			tirq  = irq_table[(pos5 & 0xc) >> 2].new_irq;
			break;
		}
	case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
	case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
	case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
	case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
		{
			tbase = ((pos2 & 0x0fe) * 0x10);
			tirq  = irq_table[(pos5 & 3)].old_irq;
			break;
		}
	}

	if(!tirq || !tbase
	   || (irq && irq != tirq)
	   || (base_addr && tbase != base_addr))
		/* FIXME: we're trying to force the ordering of the
		 * devices here, there should be a way of getting this
		 * to happen */
		return -ENXIO;

        /* Adapter found. */
	dev  = alloc_ei_netdev();
	if(!dev)
		return -ENODEV;

	SET_NETDEV_DEV(dev, gen_dev);
	mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
	mca_device_set_claim(mca_dev, 1);

	printk(KERN_INFO "smc_mca: %s found in slot %d\n",
		       smc_mca_adapter_names[adapter], slot + 1);

	ultra_found++;

	dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
	dev->irq       = mca_device_transform_irq(mca_dev, tirq);
	dev->mem_start = 0;
	num_pages      = 40;

	switch (adapter) {	/* card-# in const array above [hs] */
		case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
		case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
		{
			for (i = 0; i < 16; i++) { /* taking 16 counts
						    * up to 15 [hs] */
				if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) {
					dev->mem_start = (unsigned long)
					  mca_device_transform_memory(mca_dev, (void *)mem_table[i].mem_start);
					num_pages = mem_table[i].num_pages;
				}
			}
			break;
		}
		case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
		case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
		case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
		case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
		{
			dev->mem_start = (unsigned long)
			  mca_device_transform_memory(mca_dev, (void *)((pos3 & 0xfc) * 0x1000));
			num_pages = 0x40;
			break;
		}
		case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
		case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
		{
			/* courtesy of gamera@quartz.ocn.ne.jp, pos3 indicates
			 * the index of the 0x2000 step.
			 * beware different number of pages [hs]
			 */
			dev->mem_start = (unsigned long)
			  mca_device_transform_memory(mca_dev, (void *)(0xc0000 + (0x2000 * (pos3 & 0xf))));
			num_pages = 0x20 + (2 * (pos3 & 0x10));
			break;
		}
	}

	/* sanity check, shouldn't happen */
	if (dev->mem_start == 0) {
		rc = -ENODEV;
		goto err_unclaim;
	}

	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) {
		rc = -ENODEV;
		goto err_unclaim;
	}

	reg4 = inb(ioaddr + 4) & 0x7f;
	outb(reg4, ioaddr + 4);

	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = inb(ioaddr + 8 + i);

	printk(KERN_INFO "smc_mca[%d]: Parameters: %#3x, %pM",
	       slot + 1, ioaddr, dev->dev_addr);

	/* Switch from the station address to the alternate register set
	 * and read the useful registers there.
	 */

	outb(0x80 | reg4, ioaddr + 4);

	/* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot.
	 */

	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);

	/* Switch back to the station address register set so that
	 * the MS-DOS driver can find the card after a warm boot.
	 */

	outb(reg4, ioaddr + 4);

	dev_set_drvdata(gen_dev, dev);

	/* The 8390 isn't at the base address, so fake the offset
	 */

	dev->base_addr = ioaddr + ULTRA_NIC_OFFSET;

	ei_status.name = "SMC Ultra MCA";
	ei_status.word16 = 1;
	ei_status.tx_start_page = START_PG;
	ei_status.rx_start_page = START_PG + TX_PAGES;
	ei_status.stop_page = num_pages;

	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG) * 256);
	if (!ei_status.mem) {
		rc = -ENOMEM;
		goto err_release_region;
	}

	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG) * 256;

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

	ei_status.reset_8390 = &ultramca_reset_8390;
	ei_status.block_input = &ultramca_block_input;
	ei_status.block_output = &ultramca_block_output;
	ei_status.get_8390_hdr = &ultramca_get_8390_hdr;

	ei_status.priv = slot;

	dev->netdev_ops = &ultramca_netdev_ops;

	NS8390_init(dev, 0);

	rc = register_netdev(dev);
	if (rc)
		goto err_unmap;

	return 0;

err_unmap:
	iounmap(ei_status.mem);
err_release_region:
	release_region(ioaddr, ULTRA_IO_EXTENT);
err_unclaim:
	mca_device_set_claim(mca_dev, 0);
	free_netdev(dev);
	return rc;
}

static int ultramca_open(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
	int retval;

	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
		return retval;

	outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
	outb(0x80, ioaddr + 5);     /* ??? */
	outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
	outb(0x04, ioaddr + 5);     /* ??? */

	/* Set the early receive warning level in window 0 high enough not
	 * to receive ERW interrupts.
	 */

	/* outb_p(E8390_NODMA + E8390_PAGE0, dev->base_addr);
	 * outb(0xff, dev->base_addr + EN0_ERWCNT);
	 */

	ei_open(dev);
	return 0;
}

static void ultramca_reset_8390(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */

	outb(ULTRA_RESET, ioaddr);
	if (ei_debug > 1)
		printk("resetting Ultra, t=%ld...", jiffies);
	ei_status.txing = 0;

	outb(0x80, ioaddr + 5);     /* ??? */
	outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */

	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 ultramca_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG) << 8);

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

/* Block input and output are easy on shared memory ethercards, the only
 * complication is when the ring buffer wraps.
 */

static void ultramca_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	void __iomem *xfer_start = ei_status.mem + ring_offset - START_PG * 256;

	if (ring_offset + count > ei_status.stop_page * 256) {
		/* We must wrap the input move. */
		int semi_count = ei_status.stop_page * 256 - ring_offset;
		memcpy_fromio(skb->data, xfer_start, semi_count);
		count -= semi_count;
		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
	} else {
		memcpy_fromio(skb->data, xfer_start, count);
	}

}

static void ultramca_block_output(struct net_device *dev, int count, const unsigned char *buf,
                int start_page)
{
	void __iomem *shmem = ei_status.mem + ((start_page - START_PG) << 8);

	memcpy_toio(shmem, buf, count);
}

static int ultramca_close_card(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */

	netif_stop_queue(dev);

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

	outb(0x00, ioaddr + 6);     /* Disable interrupts. */
	free_irq(dev->irq, dev);

	NS8390_init(dev, 0);
	/* We should someday disable shared memory and change to 8-bit mode
         * "just in case"...
	 */

	return 0;
}

static int ultramca_remove(struct device *gen_dev)
{
	struct mca_device *mca_dev = to_mca_device(gen_dev);
	struct net_device *dev = dev_get_drvdata(gen_dev);

	if (dev) {
		/* NB: ultra_close_card() does free_irq */
		int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;

		unregister_netdev(dev);
		mca_device_set_claim(mca_dev, 0);
		release_region(ioaddr, ULTRA_IO_EXTENT);
		iounmap(ei_status.mem);
		free_netdev(dev);
	}
	return 0;
}


static struct mca_driver ultra_driver = {
	.id_table = smc_mca_adapter_ids,
	.driver = {
		.name = "smc-mca",
		.bus = &mca_bus_type,
		.probe = ultramca_probe,
		.remove = ultramca_remove,
	}
};

static int __init ultramca_init_module(void)
{
	if(!MCA_bus)
		return -ENXIO;

	mca_register_driver(&ultra_driver);

	return ultra_found ? 0 : -ENXIO;
}

static void __exit ultramca_cleanup_module(void)
{
	mca_unregister_driver(&ultra_driver);
}
module_init(ultramca_init_module);
module_exit(ultramca_cleanup_module);