Root/drivers/pcmcia/ds.c

1/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2010 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26#include <linux/dma-mapping.h>
27#include <linux/slab.h>
28
29#include <pcmcia/cistpl.h>
30#include <pcmcia/ds.h>
31#include <pcmcia/ss.h>
32
33#include "cs_internal.h"
34
35/*====================================================================*/
36
37/* Module parameters */
38
39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40MODULE_DESCRIPTION("PCMCIA Driver Services");
41MODULE_LICENSE("GPL");
42
43
44/*====================================================================*/
45
46static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
47{
48    const struct pcmcia_device_id *did = p_drv->id_table;
49    unsigned int i;
50    u32 hash;
51
52    if (!p_drv->probe || !p_drv->remove)
53        printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54               "function\n", p_drv->name);
55
56    while (did && did->match_flags) {
57        for (i = 0; i < 4; i++) {
58            if (!did->prod_id[i])
59                continue;
60
61            hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62            if (hash == did->prod_id_hash[i])
63                continue;
64
65            printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66                   "product string \"%s\": is 0x%x, should "
67                   "be 0x%x\n", p_drv->name, did->prod_id[i],
68                   did->prod_id_hash[i], hash);
69            printk(KERN_DEBUG "pcmcia: see "
70                "Documentation/pcmcia/devicetable.txt for "
71                "details\n");
72        }
73        did++;
74    }
75
76    return;
77}
78
79
80/*======================================================================*/
81
82
83struct pcmcia_dynid {
84    struct list_head node;
85    struct pcmcia_device_id id;
86};
87
88/**
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
92 * @count: input size
93 *
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
96 */
97static ssize_t
98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
99{
100    struct pcmcia_dynid *dynid;
101    struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102    __u16 match_flags, manf_id, card_id;
103    __u8 func_id, function, device_no;
104    __u32 prod_id_hash[4] = {0, 0, 0, 0};
105    int fields = 0;
106    int retval = 0;
107
108    fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109            &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110            &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
111    if (fields < 6)
112        return -EINVAL;
113
114    dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
115    if (!dynid)
116        return -ENOMEM;
117
118    dynid->id.match_flags = match_flags;
119    dynid->id.manf_id = manf_id;
120    dynid->id.card_id = card_id;
121    dynid->id.func_id = func_id;
122    dynid->id.function = function;
123    dynid->id.device_no = device_no;
124    memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
125
126    mutex_lock(&pdrv->dynids.lock);
127    list_add_tail(&dynid->node, &pdrv->dynids.list);
128    mutex_unlock(&pdrv->dynids.lock);
129
130    retval = driver_attach(&pdrv->drv);
131
132    if (retval)
133        return retval;
134    return count;
135}
136static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
137
138static void
139pcmcia_free_dynids(struct pcmcia_driver *drv)
140{
141    struct pcmcia_dynid *dynid, *n;
142
143    mutex_lock(&drv->dynids.lock);
144    list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145        list_del(&dynid->node);
146        kfree(dynid);
147    }
148    mutex_unlock(&drv->dynids.lock);
149}
150
151static int
152pcmcia_create_newid_file(struct pcmcia_driver *drv)
153{
154    int error = 0;
155    if (drv->probe != NULL)
156        error = driver_create_file(&drv->drv, &driver_attr_new_id);
157    return error;
158}
159
160static void
161pcmcia_remove_newid_file(struct pcmcia_driver *drv)
162{
163    driver_remove_file(&drv->drv, &driver_attr_new_id);
164}
165
166/**
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
169 *
170 * Registers a PCMCIA driver with the PCMCIA bus core.
171 */
172int pcmcia_register_driver(struct pcmcia_driver *driver)
173{
174    int error;
175
176    if (!driver)
177        return -EINVAL;
178
179    pcmcia_check_driver(driver);
180
181    /* initialize common fields */
182    driver->drv.bus = &pcmcia_bus_type;
183    driver->drv.owner = driver->owner;
184    driver->drv.name = driver->name;
185    mutex_init(&driver->dynids.lock);
186    INIT_LIST_HEAD(&driver->dynids.list);
187
188    pr_debug("registering driver %s\n", driver->name);
189
190    error = driver_register(&driver->drv);
191    if (error < 0)
192        return error;
193
194    error = pcmcia_create_newid_file(driver);
195    if (error)
196        driver_unregister(&driver->drv);
197
198    return error;
199}
200EXPORT_SYMBOL(pcmcia_register_driver);
201
202/**
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
205 */
206void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207{
208    pr_debug("unregistering driver %s\n", driver->name);
209    pcmcia_remove_newid_file(driver);
210    driver_unregister(&driver->drv);
211    pcmcia_free_dynids(driver);
212}
213EXPORT_SYMBOL(pcmcia_unregister_driver);
214
215
216/* pcmcia_device handling */
217
218static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
219{
220    struct device *tmp_dev;
221    tmp_dev = get_device(&p_dev->dev);
222    if (!tmp_dev)
223        return NULL;
224    return to_pcmcia_dev(tmp_dev);
225}
226
227static void pcmcia_put_dev(struct pcmcia_device *p_dev)
228{
229    if (p_dev)
230        put_device(&p_dev->dev);
231}
232
233static void pcmcia_release_function(struct kref *ref)
234{
235    struct config_t *c = container_of(ref, struct config_t, ref);
236    pr_debug("releasing config_t\n");
237    kfree(c);
238}
239
240static void pcmcia_release_dev(struct device *dev)
241{
242    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
243    int i;
244    dev_dbg(dev, "releasing device\n");
245    pcmcia_put_socket(p_dev->socket);
246    for (i = 0; i < 4; i++)
247        kfree(p_dev->prod_id[i]);
248    kfree(p_dev->devname);
249    kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250    kfree(p_dev);
251}
252
253
254static int pcmcia_device_probe(struct device *dev)
255{
256    struct pcmcia_device *p_dev;
257    struct pcmcia_driver *p_drv;
258    struct pcmcia_socket *s;
259    cistpl_config_t cis_config;
260    int ret = 0;
261
262    dev = get_device(dev);
263    if (!dev)
264        return -ENODEV;
265
266    p_dev = to_pcmcia_dev(dev);
267    p_drv = to_pcmcia_drv(dev->driver);
268    s = p_dev->socket;
269
270    dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
271
272    if ((!p_drv->probe) || (!p_dev->function_config) ||
273        (!try_module_get(p_drv->owner))) {
274        ret = -EINVAL;
275        goto put_dev;
276    }
277
278    /* set up some more device information */
279    ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280                &cis_config);
281    if (!ret) {
282        p_dev->config_base = cis_config.base;
283        p_dev->config_regs = cis_config.rmask[0];
284        dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
285            p_dev->config_regs);
286    } else {
287        dev_printk(KERN_INFO, dev,
288               "pcmcia: could not parse base and rmask0 of CIS\n");
289        p_dev->config_base = 0;
290        p_dev->config_regs = 0;
291    }
292
293    ret = p_drv->probe(p_dev);
294    if (ret) {
295        dev_dbg(dev, "binding to %s failed with %d\n",
296               p_drv->name, ret);
297        goto put_module;
298    }
299    dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300        p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301    dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302        p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303        p_dev->resource[3], p_dev->resource[4]);
304
305    mutex_lock(&s->ops_mutex);
306    if ((s->pcmcia_pfc) &&
307        (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308        pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309    mutex_unlock(&s->ops_mutex);
310
311put_module:
312    if (ret)
313        module_put(p_drv->owner);
314put_dev:
315    if (ret)
316        put_device(dev);
317    return ret;
318}
319
320
321/*
322 * Removes a PCMCIA card from the device tree and socket list.
323 */
324static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
325{
326    struct pcmcia_device *p_dev;
327    struct pcmcia_device *tmp;
328
329    dev_dbg(leftover ? &leftover->dev : &s->dev,
330           "pcmcia_card_remove(%d) %s\n", s->sock,
331           leftover ? leftover->devname : "");
332
333    mutex_lock(&s->ops_mutex);
334    if (!leftover)
335        s->device_count = 0;
336    else
337        s->device_count = 1;
338    mutex_unlock(&s->ops_mutex);
339
340    /* unregister all pcmcia_devices registered with this socket, except leftover */
341    list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342        if (p_dev == leftover)
343            continue;
344
345        mutex_lock(&s->ops_mutex);
346        list_del(&p_dev->socket_device_list);
347        mutex_unlock(&s->ops_mutex);
348
349        dev_dbg(&p_dev->dev, "unregistering device\n");
350        device_unregister(&p_dev->dev);
351    }
352
353    return;
354}
355
356static int pcmcia_device_remove(struct device *dev)
357{
358    struct pcmcia_device *p_dev;
359    struct pcmcia_driver *p_drv;
360    int i;
361
362    p_dev = to_pcmcia_dev(dev);
363    p_drv = to_pcmcia_drv(dev->driver);
364
365    dev_dbg(dev, "removing device\n");
366
367    /* If we're removing the primary module driving a
368     * pseudo multi-function card, we need to unbind
369     * all devices
370     */
371    if ((p_dev->socket->pcmcia_pfc) &&
372        (p_dev->socket->device_count > 0) &&
373        (p_dev->device_no == 0))
374        pcmcia_card_remove(p_dev->socket, p_dev);
375
376    /* detach the "instance" */
377    if (!p_drv)
378        return 0;
379
380    if (p_drv->remove)
381        p_drv->remove(p_dev);
382
383    /* check for proper unloading */
384    if (p_dev->_irq || p_dev->_io || p_dev->_locked)
385        dev_printk(KERN_INFO, dev,
386            "pcmcia: driver %s did not release config properly\n",
387            p_drv->name);
388
389    for (i = 0; i < MAX_WIN; i++)
390        if (p_dev->_win & CLIENT_WIN_REQ(i))
391            dev_printk(KERN_INFO, dev,
392              "pcmcia: driver %s did not release window properly\n",
393               p_drv->name);
394
395    /* references from pcmcia_probe_device */
396    pcmcia_put_dev(p_dev);
397    module_put(p_drv->owner);
398
399    return 0;
400}
401
402
403/*
404 * pcmcia_device_query -- determine information about a pcmcia device
405 */
406static int pcmcia_device_query(struct pcmcia_device *p_dev)
407{
408    cistpl_manfid_t manf_id;
409    cistpl_funcid_t func_id;
410    cistpl_vers_1_t *vers1;
411    unsigned int i;
412
413    vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
414    if (!vers1)
415        return -ENOMEM;
416
417    if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418                   CISTPL_MANFID, &manf_id)) {
419        mutex_lock(&p_dev->socket->ops_mutex);
420        p_dev->manf_id = manf_id.manf;
421        p_dev->card_id = manf_id.card;
422        p_dev->has_manf_id = 1;
423        p_dev->has_card_id = 1;
424        mutex_unlock(&p_dev->socket->ops_mutex);
425    }
426
427    if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428                   CISTPL_FUNCID, &func_id)) {
429        mutex_lock(&p_dev->socket->ops_mutex);
430        p_dev->func_id = func_id.func;
431        p_dev->has_func_id = 1;
432        mutex_unlock(&p_dev->socket->ops_mutex);
433    } else {
434        /* rule of thumb: cards with no FUNCID, but with
435         * common memory device geometry information, are
436         * probably memory cards (from pcmcia-cs) */
437        cistpl_device_geo_t *devgeo;
438
439        devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
440        if (!devgeo) {
441            kfree(vers1);
442            return -ENOMEM;
443        }
444        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445                      CISTPL_DEVICE_GEO, devgeo)) {
446            dev_dbg(&p_dev->dev,
447                   "mem device geometry probably means "
448                   "FUNCID_MEMORY\n");
449            mutex_lock(&p_dev->socket->ops_mutex);
450            p_dev->func_id = CISTPL_FUNCID_MEMORY;
451            p_dev->has_func_id = 1;
452            mutex_unlock(&p_dev->socket->ops_mutex);
453        }
454        kfree(devgeo);
455    }
456
457    if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
458                   vers1)) {
459        mutex_lock(&p_dev->socket->ops_mutex);
460        for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
461            char *tmp;
462            unsigned int length;
463            char *new;
464
465            tmp = vers1->str + vers1->ofs[i];
466
467            length = strlen(tmp) + 1;
468            if ((length < 2) || (length > 255))
469                continue;
470
471            new = kmalloc(sizeof(char) * length, GFP_KERNEL);
472            if (!new)
473                continue;
474
475            new = strncpy(new, tmp, length);
476
477            tmp = p_dev->prod_id[i];
478            p_dev->prod_id[i] = new;
479            kfree(tmp);
480        }
481        mutex_unlock(&p_dev->socket->ops_mutex);
482    }
483
484    kfree(vers1);
485    return 0;
486}
487
488
489static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
490                           unsigned int function)
491{
492    struct pcmcia_device *p_dev, *tmp_dev;
493    int i;
494
495    s = pcmcia_get_socket(s);
496    if (!s)
497        return NULL;
498
499    pr_debug("adding device to %d, function %d\n", s->sock, function);
500
501    p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
502    if (!p_dev)
503        goto err_put;
504
505    mutex_lock(&s->ops_mutex);
506    p_dev->device_no = (s->device_count++);
507    mutex_unlock(&s->ops_mutex);
508
509    /* max of 2 PFC devices */
510    if ((p_dev->device_no >= 2) && (function == 0))
511        goto err_free;
512
513    /* max of 4 devices overall */
514    if (p_dev->device_no >= 4)
515        goto err_free;
516
517    p_dev->socket = s;
518    p_dev->func = function;
519
520    p_dev->dev.bus = &pcmcia_bus_type;
521    p_dev->dev.parent = s->dev.parent;
522    p_dev->dev.release = pcmcia_release_dev;
523    /* by default don't allow DMA */
524    p_dev->dma_mask = DMA_MASK_NONE;
525    p_dev->dev.dma_mask = &p_dev->dma_mask;
526    dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
527    if (!dev_name(&p_dev->dev))
528        goto err_free;
529    p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
530    if (!p_dev->devname)
531        goto err_free;
532    dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
533
534    mutex_lock(&s->ops_mutex);
535
536    /*
537     * p_dev->function_config must be the same for all card functions.
538     * Note that this is serialized by ops_mutex, so that only one
539     * such struct will be created.
540     */
541    list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
542        if (p_dev->func == tmp_dev->func) {
543            p_dev->function_config = tmp_dev->function_config;
544            p_dev->irq = tmp_dev->irq;
545            kref_get(&p_dev->function_config->ref);
546        }
547
548    /* Add to the list in pcmcia_bus_socket */
549    list_add(&p_dev->socket_device_list, &s->devices_list);
550
551    if (pcmcia_setup_irq(p_dev))
552        dev_warn(&p_dev->dev,
553            "IRQ setup failed -- device might not work\n");
554
555    if (!p_dev->function_config) {
556        config_t *c;
557        dev_dbg(&p_dev->dev, "creating config_t\n");
558        c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
559        if (!c) {
560            mutex_unlock(&s->ops_mutex);
561            goto err_unreg;
562        }
563        p_dev->function_config = c;
564        kref_init(&c->ref);
565        for (i = 0; i < MAX_IO_WIN; i++) {
566            c->io[i].name = p_dev->devname;
567            c->io[i].flags = IORESOURCE_IO;
568        }
569        for (i = 0; i< MAX_WIN; i++) {
570            c->mem[i].name = p_dev->devname;
571            c->mem[i].flags = IORESOURCE_MEM;
572        }
573    }
574    for (i = 0; i < MAX_IO_WIN; i++)
575        p_dev->resource[i] = &p_dev->function_config->io[i];
576    for (; i < (MAX_IO_WIN + MAX_WIN); i++)
577        p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
578
579    mutex_unlock(&s->ops_mutex);
580
581    dev_printk(KERN_NOTICE, &p_dev->dev,
582           "pcmcia: registering new device %s (IRQ: %d)\n",
583           p_dev->devname, p_dev->irq);
584
585    pcmcia_device_query(p_dev);
586
587    if (device_register(&p_dev->dev))
588        goto err_unreg;
589
590    return p_dev;
591
592 err_unreg:
593    mutex_lock(&s->ops_mutex);
594    list_del(&p_dev->socket_device_list);
595    mutex_unlock(&s->ops_mutex);
596
597 err_free:
598    mutex_lock(&s->ops_mutex);
599    s->device_count--;
600    mutex_unlock(&s->ops_mutex);
601
602    for (i = 0; i < 4; i++)
603        kfree(p_dev->prod_id[i]);
604    kfree(p_dev->devname);
605    kfree(p_dev);
606 err_put:
607    pcmcia_put_socket(s);
608
609    return NULL;
610}
611
612
613static int pcmcia_card_add(struct pcmcia_socket *s)
614{
615    cistpl_longlink_mfc_t mfc;
616    unsigned int no_funcs, i, no_chains;
617    int ret = -EAGAIN;
618
619    mutex_lock(&s->ops_mutex);
620    if (!(s->resource_setup_done)) {
621        dev_dbg(&s->dev,
622               "no resources available, delaying card_add\n");
623        mutex_unlock(&s->ops_mutex);
624        return -EAGAIN; /* try again, but later... */
625    }
626
627    if (pcmcia_validate_mem(s)) {
628        dev_dbg(&s->dev, "validating mem resources failed, "
629               "delaying card_add\n");
630        mutex_unlock(&s->ops_mutex);
631        return -EAGAIN; /* try again, but later... */
632    }
633    mutex_unlock(&s->ops_mutex);
634
635    ret = pccard_validate_cis(s, &no_chains);
636    if (ret || !no_chains) {
637        dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
638        return -ENODEV;
639    }
640
641    if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
642        no_funcs = mfc.nfn;
643    else
644        no_funcs = 1;
645    s->functions = no_funcs;
646
647    for (i = 0; i < no_funcs; i++)
648        pcmcia_device_add(s, i);
649
650    return ret;
651}
652
653
654static int pcmcia_requery_callback(struct device *dev, void * _data)
655{
656    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
657    if (!p_dev->dev.driver) {
658        dev_dbg(dev, "update device information\n");
659        pcmcia_device_query(p_dev);
660    }
661
662    return 0;
663}
664
665
666static void pcmcia_requery(struct pcmcia_socket *s)
667{
668    int has_pfc;
669
670    if (s->functions == 0) {
671        pcmcia_card_add(s);
672        return;
673    }
674
675    /* some device information might have changed because of a CIS
676     * update or because we can finally read it correctly... so
677     * determine it again, overwriting old values if necessary. */
678    bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
679
680    /* if the CIS changed, we need to check whether the number of
681     * functions changed. */
682    if (s->fake_cis) {
683        int old_funcs, new_funcs;
684        cistpl_longlink_mfc_t mfc;
685
686        /* does this cis override add or remove functions? */
687        old_funcs = s->functions;
688
689        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
690                    &mfc))
691            new_funcs = mfc.nfn;
692        else
693            new_funcs = 1;
694        if (old_funcs != new_funcs) {
695            /* we need to re-start */
696            pcmcia_card_remove(s, NULL);
697            s->functions = 0;
698            pcmcia_card_add(s);
699        }
700    }
701
702    /* If the PCMCIA device consists of two pseudo devices,
703     * call pcmcia_device_add() -- which will fail if both
704     * devices are already registered. */
705    mutex_lock(&s->ops_mutex);
706    has_pfc = s->pcmcia_pfc;
707    mutex_unlock(&s->ops_mutex);
708    if (has_pfc)
709        pcmcia_device_add(s, 0);
710
711    /* we re-scan all devices, not just the ones connected to this
712     * socket. This does not matter, though. */
713    if (bus_rescan_devices(&pcmcia_bus_type))
714        dev_warn(&s->dev, "rescanning the bus failed\n");
715}
716
717
718#ifdef CONFIG_PCMCIA_LOAD_CIS
719
720/**
721 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
722 * @dev: the pcmcia device which needs a CIS override
723 * @filename: requested filename in /lib/firmware/
724 *
725 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
726 * the one provided by the card is broken. The firmware files reside in
727 * /lib/firmware/ in userspace.
728 */
729static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
730{
731    struct pcmcia_socket *s = dev->socket;
732    const struct firmware *fw;
733    int ret = -ENOMEM;
734    cistpl_longlink_mfc_t mfc;
735    int old_funcs, new_funcs = 1;
736
737    if (!filename)
738        return -EINVAL;
739
740    dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
741
742    if (request_firmware(&fw, filename, &dev->dev) == 0) {
743        if (fw->size >= CISTPL_MAX_CIS_SIZE) {
744            ret = -EINVAL;
745            dev_printk(KERN_ERR, &dev->dev,
746                   "pcmcia: CIS override is too big\n");
747            goto release;
748        }
749
750        if (!pcmcia_replace_cis(s, fw->data, fw->size))
751            ret = 0;
752        else {
753            dev_printk(KERN_ERR, &dev->dev,
754                   "pcmcia: CIS override failed\n");
755            goto release;
756        }
757
758        /* we need to re-start if the number of functions changed */
759        old_funcs = s->functions;
760        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
761                    &mfc))
762            new_funcs = mfc.nfn;
763
764        if (old_funcs != new_funcs)
765            ret = -EBUSY;
766
767        /* update information */
768        pcmcia_device_query(dev);
769
770        /* requery (as number of functions might have changed) */
771        pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
772    }
773 release:
774    release_firmware(fw);
775
776    return ret;
777}
778
779#else /* !CONFIG_PCMCIA_LOAD_CIS */
780
781static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
782{
783    return -ENODEV;
784}
785
786#endif
787
788
789static inline int pcmcia_devmatch(struct pcmcia_device *dev,
790                  const struct pcmcia_device_id *did)
791{
792    if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
793        if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
794            return 0;
795    }
796
797    if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
798        if ((!dev->has_card_id) || (dev->card_id != did->card_id))
799            return 0;
800    }
801
802    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
803        if (dev->func != did->function)
804            return 0;
805    }
806
807    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
808        if (!dev->prod_id[0])
809            return 0;
810        if (strcmp(did->prod_id[0], dev->prod_id[0]))
811            return 0;
812    }
813
814    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
815        if (!dev->prod_id[1])
816            return 0;
817        if (strcmp(did->prod_id[1], dev->prod_id[1]))
818            return 0;
819    }
820
821    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
822        if (!dev->prod_id[2])
823            return 0;
824        if (strcmp(did->prod_id[2], dev->prod_id[2]))
825            return 0;
826    }
827
828    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
829        if (!dev->prod_id[3])
830            return 0;
831        if (strcmp(did->prod_id[3], dev->prod_id[3]))
832            return 0;
833    }
834
835    if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
836        dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
837        mutex_lock(&dev->socket->ops_mutex);
838        dev->socket->pcmcia_pfc = 1;
839        mutex_unlock(&dev->socket->ops_mutex);
840        if (dev->device_no != did->device_no)
841            return 0;
842    }
843
844    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
845        int ret;
846
847        if ((!dev->has_func_id) || (dev->func_id != did->func_id))
848            return 0;
849
850        /* if this is a pseudo-multi-function device,
851         * we need explicit matches */
852        if (dev->socket->pcmcia_pfc)
853            return 0;
854        if (dev->device_no)
855            return 0;
856
857        /* also, FUNC_ID matching needs to be activated by userspace
858         * after it has re-checked that there is no possible module
859         * with a prod_id/manf_id/card_id match.
860         */
861        mutex_lock(&dev->socket->ops_mutex);
862        ret = dev->allow_func_id_match;
863        mutex_unlock(&dev->socket->ops_mutex);
864
865        if (!ret) {
866            dev_dbg(&dev->dev,
867                "skipping FUNC_ID match until userspace ACK\n");
868            return 0;
869        }
870    }
871
872    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
873        dev_dbg(&dev->dev, "device needs a fake CIS\n");
874        if (!dev->socket->fake_cis)
875            if (pcmcia_load_firmware(dev, did->cisfile))
876                return 0;
877    }
878
879    if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
880        int i;
881        for (i = 0; i < 4; i++)
882            if (dev->prod_id[i])
883                return 0;
884        if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
885            return 0;
886    }
887
888    return 1;
889}
890
891
892static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
893{
894    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
895    struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
896    const struct pcmcia_device_id *did = p_drv->id_table;
897    struct pcmcia_dynid *dynid;
898
899    /* match dynamic devices first */
900    mutex_lock(&p_drv->dynids.lock);
901    list_for_each_entry(dynid, &p_drv->dynids.list, node) {
902        dev_dbg(dev, "trying to match to %s\n", drv->name);
903        if (pcmcia_devmatch(p_dev, &dynid->id)) {
904            dev_dbg(dev, "matched to %s\n", drv->name);
905            mutex_unlock(&p_drv->dynids.lock);
906            return 1;
907        }
908    }
909    mutex_unlock(&p_drv->dynids.lock);
910
911    while (did && did->match_flags) {
912        dev_dbg(dev, "trying to match to %s\n", drv->name);
913        if (pcmcia_devmatch(p_dev, did)) {
914            dev_dbg(dev, "matched to %s\n", drv->name);
915            return 1;
916        }
917        did++;
918    }
919
920    return 0;
921}
922
923#ifdef CONFIG_HOTPLUG
924
925static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
926{
927    struct pcmcia_device *p_dev;
928    int i;
929    u32 hash[4] = { 0, 0, 0, 0};
930
931    if (!dev)
932        return -ENODEV;
933
934    p_dev = to_pcmcia_dev(dev);
935
936    /* calculate hashes */
937    for (i = 0; i < 4; i++) {
938        if (!p_dev->prod_id[i])
939            continue;
940        hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
941    }
942
943    if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
944        return -ENOMEM;
945
946    if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
947        return -ENOMEM;
948
949    if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
950               "pa%08Xpb%08Xpc%08Xpd%08X",
951               p_dev->has_manf_id ? p_dev->manf_id : 0,
952               p_dev->has_card_id ? p_dev->card_id : 0,
953               p_dev->has_func_id ? p_dev->func_id : 0,
954               p_dev->func,
955               p_dev->device_no,
956               hash[0],
957               hash[1],
958               hash[2],
959               hash[3]))
960        return -ENOMEM;
961
962    return 0;
963}
964
965#else
966
967static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
968{
969    return -ENODEV;
970}
971
972#endif
973
974/************************ runtime PM support ***************************/
975
976static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
977static int pcmcia_dev_resume(struct device *dev);
978
979static int runtime_suspend(struct device *dev)
980{
981    int rc;
982
983    device_lock(dev);
984    rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
985    device_unlock(dev);
986    return rc;
987}
988
989static int runtime_resume(struct device *dev)
990{
991    int rc;
992
993    device_lock(dev);
994    rc = pcmcia_dev_resume(dev);
995    device_unlock(dev);
996    return rc;
997}
998
999/************************ per-device sysfs output ***************************/
1000
1001#define pcmcia_device_attr(field, test, format) \
1002static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1003{ \
1004    struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1005    return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1006}
1007
1008#define pcmcia_device_stringattr(name, field) \
1009static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1010{ \
1011    struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1012    return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1013}
1014
1015pcmcia_device_attr(func, socket, "0x%02x\n");
1016pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1017pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1018pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1019pcmcia_device_stringattr(prod_id1, prod_id[0]);
1020pcmcia_device_stringattr(prod_id2, prod_id[1]);
1021pcmcia_device_stringattr(prod_id3, prod_id[2]);
1022pcmcia_device_stringattr(prod_id4, prod_id[3]);
1023
1024static ssize_t pcmcia_show_resources(struct device *dev,
1025                     struct device_attribute *attr, char *buf)
1026{
1027    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1028    char *str = buf;
1029    int i;
1030
1031    for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1032        str += sprintf(str, "%pr\n", p_dev->resource[i]);
1033
1034    return str - buf;
1035}
1036
1037static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1038{
1039    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1040
1041    if (p_dev->suspended)
1042        return sprintf(buf, "off\n");
1043    else
1044        return sprintf(buf, "on\n");
1045}
1046
1047static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1048                     const char *buf, size_t count)
1049{
1050    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1051    int ret = 0;
1052
1053    if (!count)
1054        return -EINVAL;
1055
1056    if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1057        ret = runtime_suspend(dev);
1058    else if (p_dev->suspended && !strncmp(buf, "on", 2))
1059        ret = runtime_resume(dev);
1060
1061    return ret ? ret : count;
1062}
1063
1064
1065static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1066{
1067    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1068    int i;
1069    u32 hash[4] = { 0, 0, 0, 0};
1070
1071    /* calculate hashes */
1072    for (i = 0; i < 4; i++) {
1073        if (!p_dev->prod_id[i])
1074            continue;
1075        hash[i] = crc32(0, p_dev->prod_id[i],
1076                strlen(p_dev->prod_id[i]));
1077    }
1078    return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1079                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1080                p_dev->has_manf_id ? p_dev->manf_id : 0,
1081                p_dev->has_card_id ? p_dev->card_id : 0,
1082                p_dev->has_func_id ? p_dev->func_id : 0,
1083                p_dev->func, p_dev->device_no,
1084                hash[0], hash[1], hash[2], hash[3]);
1085}
1086
1087static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1088        struct device_attribute *attr, const char *buf, size_t count)
1089{
1090    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1091
1092    if (!count)
1093        return -EINVAL;
1094
1095    mutex_lock(&p_dev->socket->ops_mutex);
1096    p_dev->allow_func_id_match = 1;
1097    mutex_unlock(&p_dev->socket->ops_mutex);
1098    pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1099
1100    return count;
1101}
1102
1103static struct device_attribute pcmcia_dev_attrs[] = {
1104    __ATTR(function, 0444, func_show, NULL),
1105    __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1106    __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1107    __ATTR_RO(func_id),
1108    __ATTR_RO(manf_id),
1109    __ATTR_RO(card_id),
1110    __ATTR_RO(prod_id1),
1111    __ATTR_RO(prod_id2),
1112    __ATTR_RO(prod_id3),
1113    __ATTR_RO(prod_id4),
1114    __ATTR_RO(modalias),
1115    __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1116    __ATTR_NULL,
1117};
1118
1119/* PM support, also needed for reset */
1120
1121static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1122{
1123    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1124    struct pcmcia_driver *p_drv = NULL;
1125    int ret = 0;
1126
1127    mutex_lock(&p_dev->socket->ops_mutex);
1128    if (p_dev->suspended) {
1129        mutex_unlock(&p_dev->socket->ops_mutex);
1130        return 0;
1131    }
1132    p_dev->suspended = 1;
1133    mutex_unlock(&p_dev->socket->ops_mutex);
1134
1135    dev_dbg(dev, "suspending\n");
1136
1137    if (dev->driver)
1138        p_drv = to_pcmcia_drv(dev->driver);
1139
1140    if (!p_drv)
1141        goto out;
1142
1143    if (p_drv->suspend) {
1144        ret = p_drv->suspend(p_dev);
1145        if (ret) {
1146            dev_printk(KERN_ERR, dev,
1147                   "pcmcia: device %s (driver %s) did "
1148                   "not want to go to sleep (%d)\n",
1149                   p_dev->devname, p_drv->name, ret);
1150            mutex_lock(&p_dev->socket->ops_mutex);
1151            p_dev->suspended = 0;
1152            mutex_unlock(&p_dev->socket->ops_mutex);
1153            goto out;
1154        }
1155    }
1156
1157    if (p_dev->device_no == p_dev->func) {
1158        dev_dbg(dev, "releasing configuration\n");
1159        pcmcia_release_configuration(p_dev);
1160    }
1161
1162 out:
1163    return ret;
1164}
1165
1166
1167static int pcmcia_dev_resume(struct device *dev)
1168{
1169    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1170    struct pcmcia_driver *p_drv = NULL;
1171    int ret = 0;
1172
1173    mutex_lock(&p_dev->socket->ops_mutex);
1174    if (!p_dev->suspended) {
1175        mutex_unlock(&p_dev->socket->ops_mutex);
1176        return 0;
1177    }
1178    p_dev->suspended = 0;
1179    mutex_unlock(&p_dev->socket->ops_mutex);
1180
1181    dev_dbg(dev, "resuming\n");
1182
1183    if (dev->driver)
1184        p_drv = to_pcmcia_drv(dev->driver);
1185
1186    if (!p_drv)
1187        goto out;
1188
1189    if (p_dev->device_no == p_dev->func) {
1190        dev_dbg(dev, "requesting configuration\n");
1191        ret = pcmcia_enable_device(p_dev);
1192        if (ret)
1193            goto out;
1194    }
1195
1196    if (p_drv->resume)
1197        ret = p_drv->resume(p_dev);
1198
1199 out:
1200    return ret;
1201}
1202
1203
1204static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1205{
1206    struct pcmcia_socket *skt = _data;
1207    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1208
1209    if (p_dev->socket != skt || p_dev->suspended)
1210        return 0;
1211
1212    return runtime_suspend(dev);
1213}
1214
1215static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1216{
1217    struct pcmcia_socket *skt = _data;
1218    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1219
1220    if (p_dev->socket != skt || !p_dev->suspended)
1221        return 0;
1222
1223    runtime_resume(dev);
1224
1225    return 0;
1226}
1227
1228static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1229{
1230    dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1231    bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1232    return 0;
1233}
1234
1235static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1236{
1237    dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1238    if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1239                 pcmcia_bus_suspend_callback)) {
1240        pcmcia_bus_resume(skt);
1241        return -EIO;
1242    }
1243    return 0;
1244}
1245
1246static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1247{
1248    atomic_set(&skt->present, 0);
1249    pcmcia_card_remove(skt, NULL);
1250
1251    mutex_lock(&skt->ops_mutex);
1252    destroy_cis_cache(skt);
1253    pcmcia_cleanup_irq(skt);
1254    mutex_unlock(&skt->ops_mutex);
1255
1256    return 0;
1257}
1258
1259static int pcmcia_bus_add(struct pcmcia_socket *skt)
1260{
1261    atomic_set(&skt->present, 1);
1262
1263    mutex_lock(&skt->ops_mutex);
1264    skt->pcmcia_pfc = 0;
1265    destroy_cis_cache(skt); /* to be on the safe side... */
1266    mutex_unlock(&skt->ops_mutex);
1267
1268    pcmcia_card_add(skt);
1269
1270    return 0;
1271}
1272
1273static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1274{
1275    if (!verify_cis_cache(skt))
1276        return 0;
1277
1278    dev_dbg(&skt->dev, "cis mismatch - different card\n");
1279
1280    /* first, remove the card */
1281    pcmcia_bus_remove(skt);
1282
1283    mutex_lock(&skt->ops_mutex);
1284    destroy_cis_cache(skt);
1285    kfree(skt->fake_cis);
1286    skt->fake_cis = NULL;
1287    skt->functions = 0;
1288    mutex_unlock(&skt->ops_mutex);
1289
1290    /* now, add the new card */
1291    pcmcia_bus_add(skt);
1292    return 0;
1293}
1294
1295
1296/*
1297 * NOTE: This is racy. There's no guarantee the card will still be
1298 * physically present, even if the call to this function returns
1299 * non-NULL. Furthermore, the device driver most likely is unbound
1300 * almost immediately, so the timeframe where pcmcia_dev_present
1301 * returns NULL is probably really really small.
1302 */
1303struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1304{
1305    struct pcmcia_device *p_dev;
1306    struct pcmcia_device *ret = NULL;
1307
1308    p_dev = pcmcia_get_dev(_p_dev);
1309    if (!p_dev)
1310        return NULL;
1311
1312    if (atomic_read(&p_dev->socket->present) != 0)
1313        ret = p_dev;
1314
1315    pcmcia_put_dev(p_dev);
1316    return ret;
1317}
1318EXPORT_SYMBOL(pcmcia_dev_present);
1319
1320
1321static struct pcmcia_callback pcmcia_bus_callback = {
1322    .owner = THIS_MODULE,
1323    .add = pcmcia_bus_add,
1324    .remove = pcmcia_bus_remove,
1325    .requery = pcmcia_requery,
1326    .validate = pccard_validate_cis,
1327    .suspend = pcmcia_bus_suspend,
1328    .early_resume = pcmcia_bus_early_resume,
1329    .resume = pcmcia_bus_resume,
1330};
1331
1332static int __devinit pcmcia_bus_add_socket(struct device *dev,
1333                       struct class_interface *class_intf)
1334{
1335    struct pcmcia_socket *socket = dev_get_drvdata(dev);
1336    int ret;
1337
1338    socket = pcmcia_get_socket(socket);
1339    if (!socket) {
1340        dev_printk(KERN_ERR, dev,
1341               "PCMCIA obtaining reference to socket failed\n");
1342        return -ENODEV;
1343    }
1344
1345    ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1346    if (ret) {
1347        dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1348        pcmcia_put_socket(socket);
1349        return ret;
1350    }
1351
1352    INIT_LIST_HEAD(&socket->devices_list);
1353    socket->pcmcia_pfc = 0;
1354    socket->device_count = 0;
1355    atomic_set(&socket->present, 0);
1356
1357    ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1358    if (ret) {
1359        dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1360        pcmcia_put_socket(socket);
1361        return ret;
1362    }
1363
1364    return 0;
1365}
1366
1367static void pcmcia_bus_remove_socket(struct device *dev,
1368                     struct class_interface *class_intf)
1369{
1370    struct pcmcia_socket *socket = dev_get_drvdata(dev);
1371
1372    if (!socket)
1373        return;
1374
1375    pccard_register_pcmcia(socket, NULL);
1376
1377    /* unregister any unbound devices */
1378    mutex_lock(&socket->skt_mutex);
1379    pcmcia_card_remove(socket, NULL);
1380    release_cis_mem(socket);
1381    mutex_unlock(&socket->skt_mutex);
1382
1383    sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1384
1385    pcmcia_put_socket(socket);
1386
1387    return;
1388}
1389
1390
1391/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1392static struct class_interface pcmcia_bus_interface __refdata = {
1393    .class = &pcmcia_socket_class,
1394    .add_dev = &pcmcia_bus_add_socket,
1395    .remove_dev = &pcmcia_bus_remove_socket,
1396};
1397
1398
1399struct bus_type pcmcia_bus_type = {
1400    .name = "pcmcia",
1401    .uevent = pcmcia_bus_uevent,
1402    .match = pcmcia_bus_match,
1403    .dev_attrs = pcmcia_dev_attrs,
1404    .probe = pcmcia_device_probe,
1405    .remove = pcmcia_device_remove,
1406    .suspend = pcmcia_dev_suspend,
1407    .resume = pcmcia_dev_resume,
1408};
1409
1410
1411static int __init init_pcmcia_bus(void)
1412{
1413    int ret;
1414
1415    ret = bus_register(&pcmcia_bus_type);
1416    if (ret < 0) {
1417        printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1418        return ret;
1419    }
1420    ret = class_interface_register(&pcmcia_bus_interface);
1421    if (ret < 0) {
1422        printk(KERN_WARNING
1423            "pcmcia: class_interface_register error: %d\n", ret);
1424        bus_unregister(&pcmcia_bus_type);
1425        return ret;
1426    }
1427
1428    return 0;
1429}
1430fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1431                   * pcmcia_socket_class is already registered */
1432
1433
1434static void __exit exit_pcmcia_bus(void)
1435{
1436    class_interface_unregister(&pcmcia_bus_interface);
1437
1438    bus_unregister(&pcmcia_bus_type);
1439}
1440module_exit(exit_pcmcia_bus);
1441
1442
1443MODULE_ALIAS("ds");
1444

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