aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/isdn/hisax/teles_cs.c
blob: b8eeb789f901f238352c08baa78f27e89fad2204 (plain) (blame)
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
/* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
/*======================================================================

    A teles S0 PCMCIA client driver

    Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
    Written by Christof Petig, christof.petig@wtal.de
    
    Also inspired by ELSA PCMCIA driver 
    by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
    
    Extentions to new hisax_pcmcia by Karsten Keil

    minor changes to be compatible with kernel 2.4.x
    by Jan.Schubert@GMX.li

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

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/system.h>

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#include "hisax_cfg.h"

MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
MODULE_LICENSE("GPL");

/*
   All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
   you do not define PCMCIA_DEBUG at all, all the debug code will be
   left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
   be present but disabled -- but it can then be enabled for specific
   modules at load time with a 'pc_debug=#' option to insmod.
*/

#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 char *version =
"teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
#else
#define DEBUG(n, args...)
#endif

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

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

static int protocol = 2;        /* EURO-ISDN Default */
module_param(protocol, int, 0);

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

/*
   The event() function is this driver's Card Services event handler.
   It will be called by Card Services when an appropriate card status
   event is received.  The config() and release() entry points are
   used to configure or release a socket, in response to card insertion
   and ejection events.  They are invoked from the teles_cs event
   handler.
*/

static void teles_cs_config(dev_link_t *link);
static void teles_cs_release(dev_link_t *link);
static int teles_cs_event(event_t event, int priority,
                          event_callback_args_t *args);

/*
   The attach() and detach() entry points are used to create and destroy
   "instances" of the driver, where each instance represents everything
   needed to manage one actual PCMCIA card.
*/

static dev_link_t *teles_attach(void);
static void teles_detach(dev_link_t *);

/*
   The dev_info variable is the "key" that is used to match up this
   device driver with appropriate cards, through the card configuration
   database.
*/

static dev_info_t dev_info = "teles_cs";

/*
   A linked list of "instances" of the teles_cs device.  Each actual
   PCMCIA card corresponds to one device instance, and is described
   by one dev_link_t structure (defined in ds.h).

   You may not want to use a linked list for this -- for example, the
   memory card driver uses an array of dev_link_t pointers, where minor
   device numbers are used to derive the corresponding array index.
*/

static dev_link_t *dev_list = NULL;

/*
   A dev_link_t structure has fields for most things that are needed
   to keep track of a socket, but there will usually be some device
   specific information that also needs to be kept track of.  The
   'priv' pointer in a dev_link_t structure can be used to point to
   a device-specific private data structure, like this.

   To simplify the data structure handling, we actually include the
   dev_link_t structure in the device's private data structure.

   A driver needs to provide a dev_node_t structure for each device
   on a card.  In some cases, there is only one device per card (for
   example, ethernet cards, modems).  In other cases, there may be
   many actual or logical devices (SCSI adapters, memory cards with
   multiple partitions).  The dev_node_t structures need to be kept
   in a linked list starting at the 'dev' field of a dev_link_t
   structure.  We allocate them in the card's private data structure,
   because they generally shouldn't be allocated dynamically.
   In this case, we also provide a flag to indicate if a device is
   "stopped" due to a power management event, or card ejection.  The
   device IO routines can use a flag like this to throttle IO to a
   card that is not ready to accept it.
*/

typedef struct local_info_t {
    dev_link_t          link;
    dev_node_t          node;
    int                 busy;
    int			cardnr;
} local_info_t;

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

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

    The dev_link structure is initialized, but we don't actually
    configure the card at this point -- we wait until we receive a
    card insertion event.

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

static dev_link_t *teles_attach(void)
{
    client_reg_t client_reg;
    dev_link_t *link;
    local_info_t *local;
    int ret;

    DEBUG(0, "teles_attach()\n");

    /* Allocate space for private device-specific data */
    local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
    if (!local) return NULL;
    memset(local, 0, sizeof(local_info_t));
    local->cardnr = -1;
    link = &local->link; link->priv = local;

    /* Interrupt setup */
    link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
    link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
    link->irq.Handler = NULL;

    /*
      General socket configuration defaults can go here.  In this
      client, we assume very little, and rely on the CIS for almost
      everything.  In most clients, many details (i.e., number, sizes,
      and attributes of IO windows) are fixed by the nature of the
      device, and can be hard-wired here.
    */
    link->io.NumPorts1 = 96;
    link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
    link->io.IOAddrLines = 5;

    link->conf.Attributes = CONF_ENABLE_IRQ;
    link->conf.Vcc = 50;
    link->conf.IntType = INT_MEMORY_AND_IO;

    /* 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 != CS_SUCCESS) {
        cs_error(link->handle, RegisterClient, ret);
        teles_detach(link);
        return NULL;
    }

    return link;
} /* teles_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 teles_detach(dev_link_t *link)
{
    dev_link_t **linkp;
    local_info_t *info = link->priv;
    int ret;

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

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

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

    /* Break the link with Card Services */
    if (link->handle) {
        ret = pcmcia_deregister_client(link->handle);
	if (ret != CS_SUCCESS)
	    cs_error(link->handle, DeregisterClient, ret);
    }

    /* Unlink device structure and free it */
    *linkp = link->next;
    kfree(info);

} /* teles_detach */

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

    teles_cs_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.

======================================================================*/
static int get_tuple(client_handle_t handle, tuple_t *tuple,
                     cisparse_t *parse)
{
    int i = pcmcia_get_tuple_data(handle, tuple);
    if (i != CS_SUCCESS) return i;
    return pcmcia_parse_tuple(handle, tuple, parse);
}

static int first_tuple(client_handle_t handle, tuple_t *tuple,
                     cisparse_t *parse)
{
    int i = pcmcia_get_first_tuple(handle, tuple);
    if (i != CS_SUCCESS) return i;
    return get_tuple(handle, tuple, parse);
}

static int next_tuple(client_handle_t handle, tuple_t *tuple,
                     cisparse_t *parse)
{
    int i = pcmcia_get_next_tuple(handle, tuple);
    if (i != CS_SUCCESS) return i;
    return get_tuple(handle, tuple, parse);
}

static void teles_cs_config(dev_link_t *link)
{
    client_handle_t handle;
    tuple_t tuple;
    cisparse_t parse;
    local_info_t *dev;
    int i, j, last_fn;
    u_short buf[128];
    cistpl_cftable_entry_t *cf = &parse.cftable_entry;
    IsdnCard_t icard;

    DEBUG(0, "teles_config(0x%p)\n", link);
    handle = link->handle;
    dev = link->priv;

    /*
       This reads the card's CONFIG tuple to find its configuration
       registers.
    */
    tuple.DesiredTuple = CISTPL_CONFIG;
    tuple.TupleData = (cisdata_t *)buf;
    tuple.TupleDataMax = 255;
    tuple.TupleOffset = 0;
    tuple.Attributes = 0;
    i = first_tuple(handle, &tuple, &parse);
    if (i != CS_SUCCESS) {
        last_fn = ParseTuple;
	goto cs_failed;
    }
    link->conf.ConfigBase = parse.config.base;
    link->conf.Present = parse.config.rmask[0];

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

    tuple.TupleData = (cisdata_t *)buf;
    tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
    tuple.Attributes = 0;
    tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
    i = first_tuple(handle, &tuple, &parse);
    while (i == CS_SUCCESS) {
        if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
            printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
            link->conf.ConfigIndex = cf->index;
            link->io.BasePort1 = cf->io.win[0].base;
            i = pcmcia_request_io(link->handle, &link->io);
            if (i == CS_SUCCESS) break;
        } else {
          printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
          link->conf.ConfigIndex = cf->index;
          for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
            link->io.BasePort1 = j;
            i = pcmcia_request_io(link->handle, &link->io);
            if (i == CS_SUCCESS) break;
          }
          break;
        }
        i = next_tuple(handle, &tuple, &parse);
    }

    if (i != CS_SUCCESS) {
	last_fn = RequestIO;
	goto cs_failed;
    }

    i = pcmcia_request_irq(link->handle, &link->irq);
    if (i != CS_SUCCESS) {
        link->irq.AssignedIRQ = 0;
	last_fn = RequestIRQ;
        goto cs_failed;
    }

    i = pcmcia_request_configuration(link->handle, &link->conf);
    if (i != CS_SUCCESS) {
      last_fn = RequestConfiguration;
      goto cs_failed;
    }

    /* At this point, the dev_node_t structure(s) should be
       initialized and arranged in a linked list at link->dev. *//*  */
    sprintf(dev->node.dev_name, "teles");
    dev->node.major = dev->node.minor = 0x0;

    link->dev = &dev->node;

    /* Finally, report what we've done */
    printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
           dev->node.dev_name, link->conf.ConfigIndex,
           link->conf.Vcc/10, link->conf.Vcc%10);
    if (link->conf.Vpp1)
        printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
    if (link->conf.Attributes & CONF_ENABLE_IRQ)
        printk(", irq %d", link->irq.AssignedIRQ);
    if (link->io.NumPorts1)
        printk(", io 0x%04x-0x%04x", link->io.BasePort1,
               link->io.BasePort1+link->io.NumPorts1-1);
    if (link->io.NumPorts2)
        printk(" & 0x%04x-0x%04x", link->io.BasePort2,
               link->io.BasePort2+link->io.NumPorts2-1);
    printk("\n");

    link->state &= ~DEV_CONFIG_PENDING;

    icard.para[0] = link->irq.AssignedIRQ;
    icard.para[1] = link->io.BasePort1;
    icard.protocol = protocol;
    icard.typ = ISDN_CTYPE_TELESPCMCIA;
    
    i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
    if (i < 0) {
    	printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
    		i, link->io.BasePort1);
    	teles_cs_release(link);
    } else
    	((local_info_t*)link->priv)->cardnr = i;

    return;
cs_failed:
    cs_error(link->handle, last_fn, i);
    teles_cs_release(link);
} /* teles_cs_config */

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

    After a card is removed, teles_cs_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 teles_cs_release(dev_link_t *link)
{
    local_info_t *local = link->priv;

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

    if (local) {
    	if (local->cardnr >= 0) {
    	    /* no unregister function with hisax */
	    HiSax_closecard(local->cardnr);
	}
    }
    /* Unlink the device chain */
    link->dev = NULL;

    /* Don't bother checking to see if these succeed or not */
    if (link->win)
        pcmcia_release_window(link->win);
    pcmcia_release_configuration(link->handle);
    pcmcia_release_io(link->handle, &link->io);
    pcmcia_release_irq(link->handle, &link->irq);
    link->state &= ~DEV_CONFIG;
} /* teles_cs_release */

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

    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.

    When a CARD_REMOVAL event is received, we immediately set a flag
    to block future accesses to this device.  All the functions that
    actually access the device should check this flag to make sure
    the card is still present.

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

static int teles_cs_event(event_t event, int priority,
                          event_callback_args_t *args)
{
    dev_link_t *link = args->client_data;
    local_info_t *dev = link->priv;

    DEBUG(1, "teles_cs_event(%d)\n", event);

    switch (event) {
    case CS_EVENT_CARD_REMOVAL:
        link->state &= ~DEV_PRESENT;
        if (link->state & DEV_CONFIG) {
            ((local_info_t*)link->priv)->busy = 1;
	    teles_cs_release(link);
        }
        break;
    case CS_EVENT_CARD_INSERTION:
        link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
        teles_cs_config(link);
        break;
    case CS_EVENT_PM_SUSPEND:
        link->state |= DEV_SUSPEND;
        /* Fall through... */
    case CS_EVENT_RESET_PHYSICAL:
        /* Mark the device as stopped, to block IO until later */
        dev->busy = 1;
        if (link->state & DEV_CONFIG)
            pcmcia_release_configuration(link->handle);
        break;
    case CS_EVENT_PM_RESUME:
        link->state &= ~DEV_SUSPEND;
        /* Fall through... */
    case CS_EVENT_CARD_RESET:
        if (link->state & DEV_CONFIG)
            pcmcia_request_configuration(link->handle, &link->conf);
        dev->busy = 0;
        break;
    }
    return 0;
} /* teles_cs_event */

static struct pcmcia_device_id teles_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, teles_ids);

static struct pcmcia_driver teles_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "teles_cs",
	},
	.attach		= teles_attach,
	.event		= teles_cs_event,
	.detach		= teles_detach,
	.id_table       = teles_ids,
};

static int __init init_teles_cs(void)
{
	return pcmcia_register_driver(&teles_cs_driver);
}

static void __exit exit_teles_cs(void)
{
	pcmcia_unregister_driver(&teles_cs_driver);
	BUG_ON(dev_list != NULL);
}

module_init(init_teles_cs);
module_exit(exit_teles_cs);