aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/pcmcia/com20020_cs.c
blob: 68612222de6e1ddd7f3ab7b3927ad3675a981167 (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
511
512
513
514
515
516
517
518
519
520
521
522
523
/*
 * Linux ARCnet driver - COM20020 PCMCIA support
 * 
 * Written 1994-1999 by Avery Pennarun,
 *    based on an ISA version by David Woodhouse.
 * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
 *    which was derived from pcnet_cs.c by David Hinds.
 * Some additional portions derived from skeleton.c by Donald Becker.
 *
 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
 *  for sponsoring the further development of this driver.
 *
 * **********************
 *
 * The original copyright of skeleton.c was as follows:
 *
 * skeleton.c Written 1993 by Donald Becker.
 * Copyright 1993 United States Government as represented by the
 * Director, National Security Agency.  This software may only be used
 * and distributed according to the terms of the GNU General Public License as
 * modified by SRC, incorporated herein by reference.
 * 
 * **********************
 * Changes:
 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
 * - reorganize kmallocs in com20020_attach, checking all for failure
 *   and releasing the previous allocations if one fails
 * **********************
 * 
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/arcdevice.h>
#include <linux/com20020.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

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

#define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"

#ifdef PCMCIA_DEBUG

static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)

static void regdump(struct net_device *dev)
{
    int ioaddr = dev->base_addr;
    int count;
    
    printk("com20020 register dump:\n");
    for (count = ioaddr; count < ioaddr + 16; count++)
    {
	if (!(count % 16))
	    printk("\n%04X: ", count);
	printk("%02X ", inb(count));
    }
    printk("\n");
    
    printk("buffer0 dump:\n");
	/* set up the address register */
        count = 0;
	outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
	outb(count & 0xff, _ADDR_LO);
    
    for (count = 0; count < 256+32; count++)
    {
	if (!(count % 16))
	    printk("\n%04X: ", count);
	
	/* copy the data */
	printk("%02X ", inb(_MEMDATA));
    }
    printk("\n");
}

#else

#define DEBUG(n, args...) do { } while (0)
static inline void regdump(struct net_device *dev) { }

#endif


/*====================================================================*/

/* Parameters that can be set with 'insmod' */

static int node;
static int timeout = 3;
static int backplane;
static int clockp;
static int clockm;

module_param(node, int, 0);
module_param(timeout, int, 0);
module_param(backplane, int, 0);
module_param(clockp, int, 0);
module_param(clockm, int, 0);

MODULE_LICENSE("GPL");

/*====================================================================*/

static void com20020_config(dev_link_t *link);
static void com20020_release(dev_link_t *link);
static int com20020_event(event_t event, int priority,
                       event_callback_args_t *args);

static dev_info_t dev_info = "com20020_cs";

static dev_link_t *com20020_attach(void);
static void com20020_detach(dev_link_t *);

static dev_link_t *dev_list;

/*====================================================================*/

typedef struct com20020_dev_t {
    struct net_device       *dev;
    dev_node_t          node;
} com20020_dev_t;

/*======================================================================

    com20020_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

======================================================================*/

static dev_link_t *com20020_attach(void)
{
    client_reg_t client_reg;
    dev_link_t *link;
    com20020_dev_t *info;
    struct net_device *dev;
    int ret;
    struct arcnet_local *lp;
    
    DEBUG(0, "com20020_attach()\n");

    /* Create new network device */
    link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
    if (!link)
	return NULL;

    info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
    if (!info)
	goto fail_alloc_info;

    dev = alloc_arcdev("");
    if (!dev)
	goto fail_alloc_dev;

    memset(info, 0, sizeof(struct com20020_dev_t));
    memset(link, 0, sizeof(struct dev_link_t));
    lp = dev->priv;
    lp->timeout = timeout;
    lp->backplane = backplane;
    lp->clockp = clockp;
    lp->clockm = clockm & 3;
    lp->hw.owner = THIS_MODULE;

    /* fill in our module parameters as defaults */
    dev->dev_addr[0] = node;

    link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
    link->io.NumPorts1 = 16;
    link->io.IOAddrLines = 16;
    link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
    link->irq.IRQInfo1 = IRQ_LEVEL_ID;
    link->conf.Attributes = CONF_ENABLE_IRQ;
    link->conf.Vcc = 50;
    link->conf.IntType = INT_MEMORY_AND_IO;
    link->conf.Present = PRESENT_OPTION;


    link->irq.Instance = info->dev = dev;
    link->priv = info;

    /* Register with Card Services */
    link->next = dev_list;
    dev_list = link;
    client_reg.dev_info = &dev_info;
    client_reg.Version = 0x0210;
    client_reg.event_callback_args.client_data = link;
    ret = pcmcia_register_client(&link->handle, &client_reg);
    if (ret != 0) {
        cs_error(link->handle, RegisterClient, ret);
        com20020_detach(link);
        return NULL;
    }

    return link;

fail_alloc_dev:
    kfree(info);
fail_alloc_info:
    kfree(link);
    return NULL;
} /* com20020_attach */

/*======================================================================

    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.

======================================================================*/

static void com20020_detach(dev_link_t *link)
{
    struct com20020_dev_t *info = link->priv;
    dev_link_t **linkp;
    struct net_device *dev; 
    
    DEBUG(1,"detach...\n");

    DEBUG(0, "com20020_detach(0x%p)\n", link);

    /* Locate device structure */
    for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
        if (*linkp == link) break;
    if (*linkp == NULL)
        return;

    dev = info->dev;

    if (link->dev) {
	DEBUG(1,"unregister...\n");

	unregister_netdev(dev);
	    
	/*
	 * this is necessary because we register our IRQ separately
	 * from card services.
	 */
	if (dev->irq)
	    free_irq(dev->irq, dev);
    }

    if (link->state & DEV_CONFIG)
        com20020_release(link);

    if (link->handle)
        pcmcia_deregister_client(link->handle);

    /* Unlink device structure, free bits */
    DEBUG(1,"unlinking...\n");
    *linkp = link->next;
    if (link->priv)
    {
	dev = info->dev;
	if (dev)
	{
	    DEBUG(1,"kfree...\n");
	    free_netdev(dev);
	}
	DEBUG(1,"kfree2...\n");
	kfree(info);
    }
    DEBUG(1,"kfree3...\n");
    kfree(link);

} /* com20020_detach */

/*======================================================================

    com20020_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    device available to the system.

======================================================================*/

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static void com20020_config(dev_link_t *link)
{
    struct arcnet_local *lp;
    client_handle_t handle;
    tuple_t tuple;
    cisparse_t parse;
    com20020_dev_t *info;
    struct net_device *dev;
    int i, last_ret, last_fn;
    u_char buf[64];
    int ioaddr;

    handle = link->handle;
    info = link->priv;
    dev = info->dev;

    DEBUG(1,"config...\n");

    DEBUG(0, "com20020_config(0x%p)\n", link);

    tuple.Attributes = 0;
    tuple.TupleData = buf;
    tuple.TupleDataMax = 64;
    tuple.TupleOffset = 0;
    tuple.DesiredTuple = CISTPL_CONFIG;
    CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
    CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
    CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
    link->conf.ConfigBase = parse.config.base;

    /* Configure card */
    link->state |= DEV_CONFIG;

    DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
    i = !CS_SUCCESS;
    if (!link->io.BasePort1)
    {
	for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
	{
	    link->io.BasePort1 = ioaddr;
	    i = pcmcia_request_io(link->handle, &link->io);
	    if (i == CS_SUCCESS)
		break;
	}
    }
    else
	i = pcmcia_request_io(link->handle, &link->io);
    
    if (i != CS_SUCCESS)
    {
	DEBUG(1,"arcnet: requestIO failed totally!\n");
	goto failed;
    }
	
    ioaddr = dev->base_addr = link->io.BasePort1;
    DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);

    DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
	   link->irq.AssignedIRQ,
	   link->irq.IRQInfo1, link->irq.IRQInfo2);
    i = pcmcia_request_irq(link->handle, &link->irq);
    if (i != CS_SUCCESS)
    {
	DEBUG(1,"arcnet: requestIRQ failed totally!\n");
	goto failed;
    }

    dev->irq = link->irq.AssignedIRQ;

    CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));

    if (com20020_check(dev))
    {
	regdump(dev);
	goto failed;
    }
    
    lp = dev->priv;
    lp->card_name = "PCMCIA COM20020";
    lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */

    link->dev = &info->node;
    link->state &= ~DEV_CONFIG_PENDING;
    SET_NETDEV_DEV(dev, &handle_to_dev(handle));

    i = com20020_found(dev, 0);	/* calls register_netdev */
    
    if (i != 0) {
	DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
	link->dev = NULL;
	goto failed;
    }

    strcpy(info->node.dev_name, dev->name);

    DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
           dev->name, dev->base_addr, dev->irq);
    return;

cs_failed:
    cs_error(link->handle, last_fn, last_ret);
failed:
    DEBUG(1,"com20020_config failed...\n");
    com20020_release(link);
} /* com20020_config */

/*======================================================================

    After a card is removed, com20020_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

======================================================================*/

static void com20020_release(dev_link_t *link)
{

    DEBUG(1,"release...\n");

    DEBUG(0, "com20020_release(0x%p)\n", link);

    pcmcia_release_configuration(link->handle);
    pcmcia_release_io(link->handle, &link->io);
    pcmcia_release_irq(link->handle, &link->irq);

    link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
}

static int com20020_suspend(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	com20020_dev_t *info = link->priv;
	struct net_device *dev = info->dev;

	link->state |= DEV_SUSPEND;
        if (link->state & DEV_CONFIG) {
		if (link->open) {
			netif_device_detach(dev);
		}
		pcmcia_release_configuration(link->handle);
        }

	return 0;
}

static int com20020_resume(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	com20020_dev_t *info = link->priv;
	struct net_device *dev = info->dev;

	link->state &= ~DEV_SUSPEND;
        if (link->state & DEV_CONFIG) {
		pcmcia_request_configuration(link->handle, &link->conf);
		if (link->open) {
			int ioaddr = dev->base_addr;
			struct arcnet_local *lp = dev->priv;
			ARCRESET;
		}
        }

	return 0;
}

/*======================================================================

    The card status event handler.  Mostly, this schedules other
    stuff to run after an event is received.  A CARD_REMOVAL event
    also sets some flags to discourage the net drivers from trying
    to talk to the card any more.

======================================================================*/

static int com20020_event(event_t event, int priority,
			  event_callback_args_t *args)
{
    dev_link_t *link = args->client_data;
    com20020_dev_t *info = link->priv;
    struct net_device *dev = info->dev;

    DEBUG(1, "com20020_event(0x%06x)\n", event);
    
    switch (event) {
    case CS_EVENT_CARD_REMOVAL:
        link->state &= ~DEV_PRESENT;
        if (link->state & DEV_CONFIG)
            netif_device_detach(dev);
        break;
    case CS_EVENT_CARD_INSERTION:
        link->state |= DEV_PRESENT;
	com20020_config(link); 
	break;
    }
    return 0;
} /* com20020_event */

static struct pcmcia_device_id com20020_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.", "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, com20020_ids);

static struct pcmcia_driver com20020_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "com20020_cs",
	},
	.attach		= com20020_attach,
	.event		= com20020_event,
	.detach		= com20020_detach,
	.id_table	= com20020_ids,
	.suspend	= com20020_suspend,
	.resume		= com20020_resume,
};

static int __init init_com20020_cs(void)
{
	return pcmcia_register_driver(&com20020_cs_driver);
}

static void __exit exit_com20020_cs(void)
{
	pcmcia_unregister_driver(&com20020_cs_driver);
	BUG_ON(dev_list != NULL);
}

module_init(init_com20020_cs);
module_exit(exit_com20020_cs);