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 - 2006 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/cs_types.h>
30#include <pcmcia/cs.h>
31#include <pcmcia/cistpl.h>
32#include <pcmcia/ds.h>
33#include <pcmcia/ss.h>
34
35#include "cs_internal.h"
36
37/*====================================================================*/
38
39/* Module parameters */
40
41MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42MODULE_DESCRIPTION("PCMCIA Driver Services");
43MODULE_LICENSE("GPL");
44
45
46/*====================================================================*/
47
48static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
49{
50    struct pcmcia_device_id *did = p_drv->id_table;
51    unsigned int i;
52    u32 hash;
53
54    if (!p_drv->probe || !p_drv->remove)
55        printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
56               "function\n", p_drv->drv.name);
57
58    while (did && did->match_flags) {
59        for (i = 0; i < 4; i++) {
60            if (!did->prod_id[i])
61                continue;
62
63            hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
64            if (hash == did->prod_id_hash[i])
65                continue;
66
67            printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
68                   "product string \"%s\": is 0x%x, should "
69                   "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
70                   did->prod_id_hash[i], hash);
71            printk(KERN_DEBUG "pcmcia: see "
72                "Documentation/pcmcia/devicetable.txt for "
73                "details\n");
74        }
75        did++;
76    }
77
78    return;
79}
80
81
82/*======================================================================*/
83
84
85struct pcmcia_dynid {
86    struct list_head node;
87    struct pcmcia_device_id id;
88};
89
90/**
91 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
92 * @driver: target device driver
93 * @buf: buffer for scanning device ID data
94 * @count: input size
95 *
96 * Adds a new dynamic PCMCIA device ID to this driver,
97 * and causes the driver to probe for all devices again.
98 */
99static ssize_t
100pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
101{
102    struct pcmcia_dynid *dynid;
103    struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
104    __u16 match_flags, manf_id, card_id;
105    __u8 func_id, function, device_no;
106    __u32 prod_id_hash[4] = {0, 0, 0, 0};
107    int fields = 0;
108    int retval = 0;
109
110    fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
111            &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
112            &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
113    if (fields < 6)
114        return -EINVAL;
115
116    dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
117    if (!dynid)
118        return -ENOMEM;
119
120    dynid->id.match_flags = match_flags;
121    dynid->id.manf_id = manf_id;
122    dynid->id.card_id = card_id;
123    dynid->id.func_id = func_id;
124    dynid->id.function = function;
125    dynid->id.device_no = device_no;
126    memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
127
128    mutex_lock(&pdrv->dynids.lock);
129    list_add_tail(&dynid->node, &pdrv->dynids.list);
130    mutex_unlock(&pdrv->dynids.lock);
131
132    if (get_driver(&pdrv->drv)) {
133        retval = driver_attach(&pdrv->drv);
134        put_driver(&pdrv->drv);
135    }
136
137    if (retval)
138        return retval;
139    return count;
140}
141static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
142
143static void
144pcmcia_free_dynids(struct pcmcia_driver *drv)
145{
146    struct pcmcia_dynid *dynid, *n;
147
148    mutex_lock(&drv->dynids.lock);
149    list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
150        list_del(&dynid->node);
151        kfree(dynid);
152    }
153    mutex_unlock(&drv->dynids.lock);
154}
155
156static int
157pcmcia_create_newid_file(struct pcmcia_driver *drv)
158{
159    int error = 0;
160    if (drv->probe != NULL)
161        error = driver_create_file(&drv->drv, &driver_attr_new_id);
162    return error;
163}
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    mutex_init(&driver->dynids.lock);
185    INIT_LIST_HEAD(&driver->dynids.list);
186
187    pr_debug("registering driver %s\n", driver->drv.name);
188
189    error = driver_register(&driver->drv);
190    if (error < 0)
191        return error;
192
193    error = pcmcia_create_newid_file(driver);
194    if (error)
195        driver_unregister(&driver->drv);
196
197    return error;
198}
199EXPORT_SYMBOL(pcmcia_register_driver);
200
201/**
202 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
203 * @driver: the &driver being unregistered
204 */
205void pcmcia_unregister_driver(struct pcmcia_driver *driver)
206{
207    pr_debug("unregistering driver %s\n", driver->drv.name);
208    driver_unregister(&driver->drv);
209    pcmcia_free_dynids(driver);
210}
211EXPORT_SYMBOL(pcmcia_unregister_driver);
212
213
214/* pcmcia_device handling */
215
216struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
217{
218    struct device *tmp_dev;
219    tmp_dev = get_device(&p_dev->dev);
220    if (!tmp_dev)
221        return NULL;
222    return to_pcmcia_dev(tmp_dev);
223}
224
225void pcmcia_put_dev(struct pcmcia_device *p_dev)
226{
227    if (p_dev)
228        put_device(&p_dev->dev);
229}
230
231static void pcmcia_release_function(struct kref *ref)
232{
233    struct config_t *c = container_of(ref, struct config_t, ref);
234    pr_debug("releasing config_t\n");
235    kfree(c);
236}
237
238static void pcmcia_release_dev(struct device *dev)
239{
240    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
241    int i;
242    dev_dbg(dev, "releasing device\n");
243    pcmcia_put_socket(p_dev->socket);
244    for (i = 0; i < 4; i++)
245        kfree(p_dev->prod_id[i]);
246    kfree(p_dev->devname);
247    kref_put(&p_dev->function_config->ref, pcmcia_release_function);
248    kfree(p_dev);
249}
250
251
252static int pcmcia_device_probe(struct device *dev)
253{
254    struct pcmcia_device *p_dev;
255    struct pcmcia_driver *p_drv;
256    struct pcmcia_socket *s;
257    cistpl_config_t cis_config;
258    int ret = 0;
259
260    dev = get_device(dev);
261    if (!dev)
262        return -ENODEV;
263
264    p_dev = to_pcmcia_dev(dev);
265    p_drv = to_pcmcia_drv(dev->driver);
266    s = p_dev->socket;
267
268    dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
269
270    if ((!p_drv->probe) || (!p_dev->function_config) ||
271        (!try_module_get(p_drv->owner))) {
272        ret = -EINVAL;
273        goto put_dev;
274    }
275
276    /* set up some more device information */
277    ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
278                &cis_config);
279    if (!ret) {
280        p_dev->conf.ConfigBase = cis_config.base;
281        p_dev->conf.Present = cis_config.rmask[0];
282    } else {
283        dev_printk(KERN_INFO, dev,
284               "pcmcia: could not parse base and rmask0 of CIS\n");
285        p_dev->conf.ConfigBase = 0;
286        p_dev->conf.Present = 0;
287    }
288
289    ret = p_drv->probe(p_dev);
290    if (ret) {
291        dev_dbg(dev, "binding to %s failed with %d\n",
292               p_drv->drv.name, ret);
293        goto put_module;
294    }
295
296    mutex_lock(&s->ops_mutex);
297    if ((s->pcmcia_state.has_pfc) &&
298        (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
299        pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
300    mutex_unlock(&s->ops_mutex);
301
302put_module:
303    if (ret)
304        module_put(p_drv->owner);
305put_dev:
306    if (ret)
307        put_device(dev);
308    return ret;
309}
310
311
312/*
313 * Removes a PCMCIA card from the device tree and socket list.
314 */
315static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
316{
317    struct pcmcia_device *p_dev;
318    struct pcmcia_device *tmp;
319
320    dev_dbg(leftover ? &leftover->dev : &s->dev,
321           "pcmcia_card_remove(%d) %s\n", s->sock,
322           leftover ? leftover->devname : "");
323
324    mutex_lock(&s->ops_mutex);
325    if (!leftover)
326        s->device_count = 0;
327    else
328        s->device_count = 1;
329    mutex_unlock(&s->ops_mutex);
330
331    /* unregister all pcmcia_devices registered with this socket, except leftover */
332    list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
333        if (p_dev == leftover)
334            continue;
335
336        mutex_lock(&s->ops_mutex);
337        list_del(&p_dev->socket_device_list);
338        mutex_unlock(&s->ops_mutex);
339
340        dev_dbg(&p_dev->dev, "unregistering device\n");
341        device_unregister(&p_dev->dev);
342    }
343
344    return;
345}
346
347static int pcmcia_device_remove(struct device *dev)
348{
349    struct pcmcia_device *p_dev;
350    struct pcmcia_driver *p_drv;
351    int i;
352
353    p_dev = to_pcmcia_dev(dev);
354    p_drv = to_pcmcia_drv(dev->driver);
355
356    dev_dbg(dev, "removing device\n");
357
358    /* If we're removing the primary module driving a
359     * pseudo multi-function card, we need to unbind
360     * all devices
361     */
362    if ((p_dev->socket->pcmcia_state.has_pfc) &&
363        (p_dev->socket->device_count > 0) &&
364        (p_dev->device_no == 0))
365        pcmcia_card_remove(p_dev->socket, p_dev);
366
367    /* detach the "instance" */
368    if (!p_drv)
369        return 0;
370
371    if (p_drv->remove)
372        p_drv->remove(p_dev);
373
374    p_dev->dev_node = NULL;
375
376    /* check for proper unloading */
377    if (p_dev->_irq || p_dev->_io || p_dev->_locked)
378        dev_printk(KERN_INFO, dev,
379            "pcmcia: driver %s did not release config properly\n",
380            p_drv->drv.name);
381
382    for (i = 0; i < MAX_WIN; i++)
383        if (p_dev->_win & CLIENT_WIN_REQ(i))
384            dev_printk(KERN_INFO, dev,
385              "pcmcia: driver %s did not release window properly\n",
386               p_drv->drv.name);
387
388    /* references from pcmcia_probe_device */
389    pcmcia_put_dev(p_dev);
390    module_put(p_drv->owner);
391
392    return 0;
393}
394
395
396/*
397 * pcmcia_device_query -- determine information about a pcmcia device
398 */
399static int pcmcia_device_query(struct pcmcia_device *p_dev)
400{
401    cistpl_manfid_t manf_id;
402    cistpl_funcid_t func_id;
403    cistpl_vers_1_t *vers1;
404    unsigned int i;
405
406    vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
407    if (!vers1)
408        return -ENOMEM;
409
410    if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
411                   CISTPL_MANFID, &manf_id)) {
412        mutex_lock(&p_dev->socket->ops_mutex);
413        p_dev->manf_id = manf_id.manf;
414        p_dev->card_id = manf_id.card;
415        p_dev->has_manf_id = 1;
416        p_dev->has_card_id = 1;
417        mutex_unlock(&p_dev->socket->ops_mutex);
418    }
419
420    if (!pccard_read_tuple(p_dev->socket, p_dev->func,
421                   CISTPL_FUNCID, &func_id)) {
422        mutex_lock(&p_dev->socket->ops_mutex);
423        p_dev->func_id = func_id.func;
424        p_dev->has_func_id = 1;
425        mutex_unlock(&p_dev->socket->ops_mutex);
426    } else {
427        /* rule of thumb: cards with no FUNCID, but with
428         * common memory device geometry information, are
429         * probably memory cards (from pcmcia-cs) */
430        cistpl_device_geo_t *devgeo;
431
432        devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
433        if (!devgeo) {
434            kfree(vers1);
435            return -ENOMEM;
436        }
437        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
438                      CISTPL_DEVICE_GEO, devgeo)) {
439            dev_dbg(&p_dev->dev,
440                   "mem device geometry probably means "
441                   "FUNCID_MEMORY\n");
442            mutex_lock(&p_dev->socket->ops_mutex);
443            p_dev->func_id = CISTPL_FUNCID_MEMORY;
444            p_dev->has_func_id = 1;
445            mutex_unlock(&p_dev->socket->ops_mutex);
446        }
447        kfree(devgeo);
448    }
449
450    if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
451                   vers1)) {
452        mutex_lock(&p_dev->socket->ops_mutex);
453        for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
454            char *tmp;
455            unsigned int length;
456            char *new;
457
458            tmp = vers1->str + vers1->ofs[i];
459
460            length = strlen(tmp) + 1;
461            if ((length < 2) || (length > 255))
462                continue;
463
464            new = kmalloc(sizeof(char) * length, GFP_KERNEL);
465            if (!new)
466                continue;
467
468            new = strncpy(new, tmp, length);
469
470            tmp = p_dev->prod_id[i];
471            p_dev->prod_id[i] = new;
472            kfree(tmp);
473        }
474        mutex_unlock(&p_dev->socket->ops_mutex);
475    }
476
477    kfree(vers1);
478    return 0;
479}
480
481
482/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
483 * Serializes pcmcia_device_add; will most likely be removed in future.
484 *
485 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
486 * won't work, this doesn't matter much at the moment: the driver core doesn't
487 * support it either.
488 */
489static DEFINE_MUTEX(device_add_lock);
490
491struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
492{
493    struct pcmcia_device *p_dev, *tmp_dev;
494    int i;
495
496    s = pcmcia_get_socket(s);
497    if (!s)
498        return NULL;
499
500    mutex_lock(&device_add_lock);
501
502    pr_debug("adding device to %d, function %d\n", s->sock, function);
503
504    p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
505    if (!p_dev)
506        goto err_put;
507
508    mutex_lock(&s->ops_mutex);
509    p_dev->device_no = (s->device_count++);
510    mutex_unlock(&s->ops_mutex);
511
512    /* max of 2 PFC devices */
513    if ((p_dev->device_no >= 2) && (function == 0))
514        goto err_free;
515
516    /* max of 4 devices overall */
517    if (p_dev->device_no >= 4)
518        goto err_free;
519
520    p_dev->socket = s;
521    p_dev->func = function;
522
523    p_dev->dev.bus = &pcmcia_bus_type;
524    p_dev->dev.parent = s->dev.parent;
525    p_dev->dev.release = pcmcia_release_dev;
526    /* by default don't allow DMA */
527    p_dev->dma_mask = DMA_MASK_NONE;
528    p_dev->dev.dma_mask = &p_dev->dma_mask;
529    dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
530    if (!dev_name(&p_dev->dev))
531        goto err_free;
532    p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
533    if (!p_dev->devname)
534        goto err_free;
535    dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
536
537    mutex_lock(&s->ops_mutex);
538
539    /*
540     * p_dev->function_config must be the same for all card functions.
541     * Note that this is serialized by the device_add_lock, so that
542     * only one such struct will be created.
543     */
544    list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
545        if (p_dev->func == tmp_dev->func) {
546            p_dev->function_config = tmp_dev->function_config;
547            p_dev->io = tmp_dev->io;
548            p_dev->irq = tmp_dev->irq;
549            kref_get(&p_dev->function_config->ref);
550        }
551
552    /* Add to the list in pcmcia_bus_socket */
553    list_add(&p_dev->socket_device_list, &s->devices_list);
554
555    mutex_unlock(&s->ops_mutex);
556
557    if (!p_dev->function_config) {
558        dev_dbg(&p_dev->dev, "creating config_t\n");
559        p_dev->function_config = kzalloc(sizeof(struct config_t),
560                         GFP_KERNEL);
561        if (!p_dev->function_config)
562            goto err_unreg;
563        kref_init(&p_dev->function_config->ref);
564    }
565
566    dev_printk(KERN_NOTICE, &p_dev->dev,
567           "pcmcia: registering new device %s\n",
568           p_dev->devname);
569
570    pcmcia_device_query(p_dev);
571
572    if (device_register(&p_dev->dev))
573        goto err_unreg;
574
575    mutex_unlock(&device_add_lock);
576
577    return p_dev;
578
579 err_unreg:
580    mutex_lock(&s->ops_mutex);
581    list_del(&p_dev->socket_device_list);
582    mutex_unlock(&s->ops_mutex);
583
584 err_free:
585    mutex_lock(&s->ops_mutex);
586    s->device_count--;
587    mutex_unlock(&s->ops_mutex);
588
589    for (i = 0; i < 4; i++)
590        kfree(p_dev->prod_id[i]);
591    kfree(p_dev->devname);
592    kfree(p_dev);
593 err_put:
594    mutex_unlock(&device_add_lock);
595    pcmcia_put_socket(s);
596
597    return NULL;
598}
599
600
601static int pcmcia_card_add(struct pcmcia_socket *s)
602{
603    cistpl_longlink_mfc_t mfc;
604    unsigned int no_funcs, i, no_chains;
605    int ret = -EAGAIN;
606
607    mutex_lock(&s->ops_mutex);
608    if (!(s->resource_setup_done)) {
609        dev_dbg(&s->dev,
610               "no resources available, delaying card_add\n");
611        mutex_unlock(&s->ops_mutex);
612        return -EAGAIN; /* try again, but later... */
613    }
614
615    if (pcmcia_validate_mem(s)) {
616        dev_dbg(&s->dev, "validating mem resources failed, "
617               "delaying card_add\n");
618        mutex_unlock(&s->ops_mutex);
619        return -EAGAIN; /* try again, but later... */
620    }
621    mutex_unlock(&s->ops_mutex);
622
623    ret = pccard_validate_cis(s, &no_chains);
624    if (ret || !no_chains) {
625        dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
626        return -ENODEV;
627    }
628
629    if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
630        no_funcs = mfc.nfn;
631    else
632        no_funcs = 1;
633    s->functions = no_funcs;
634
635    for (i = 0; i < no_funcs; i++)
636        pcmcia_device_add(s, i);
637
638    return ret;
639}
640
641
642static int pcmcia_requery_callback(struct device *dev, void * _data)
643{
644    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
645    if (!p_dev->dev.driver) {
646        dev_dbg(dev, "update device information\n");
647        pcmcia_device_query(p_dev);
648    }
649
650    return 0;
651}
652
653
654static void pcmcia_requery(struct pcmcia_socket *s)
655{
656    int has_pfc;
657
658    if (s->functions == 0) {
659        pcmcia_card_add(s);
660        return;
661    }
662
663    /* some device information might have changed because of a CIS
664     * update or because we can finally read it correctly... so
665     * determine it again, overwriting old values if necessary. */
666    bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
667
668    /* if the CIS changed, we need to check whether the number of
669     * functions changed. */
670    if (s->fake_cis) {
671        int old_funcs, new_funcs;
672        cistpl_longlink_mfc_t mfc;
673
674        /* does this cis override add or remove functions? */
675        old_funcs = s->functions;
676
677        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
678                    &mfc))
679            new_funcs = mfc.nfn;
680        else
681            new_funcs = 1;
682        if (old_funcs != new_funcs) {
683            /* we need to re-start */
684            pcmcia_card_remove(s, NULL);
685            pcmcia_card_add(s);
686        }
687    }
688
689    /* If the PCMCIA device consists of two pseudo devices,
690     * call pcmcia_device_add() -- which will fail if both
691     * devices are already registered. */
692    mutex_lock(&s->ops_mutex);
693    has_pfc = s->pcmcia_state.has_pfc;
694    mutex_unlock(&s->ops_mutex);
695    if (has_pfc)
696        pcmcia_device_add(s, 0);
697
698    /* we re-scan all devices, not just the ones connected to this
699     * socket. This does not matter, though. */
700    if (bus_rescan_devices(&pcmcia_bus_type))
701        dev_warn(&s->dev, "rescanning the bus failed\n");
702}
703
704
705#ifdef CONFIG_PCMCIA_LOAD_CIS
706
707/**
708 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
709 * @dev: the pcmcia device which needs a CIS override
710 * @filename: requested filename in /lib/firmware/
711 *
712 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
713 * the one provided by the card is broken. The firmware files reside in
714 * /lib/firmware/ in userspace.
715 */
716static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
717{
718    struct pcmcia_socket *s = dev->socket;
719    const struct firmware *fw;
720    int ret = -ENOMEM;
721    cistpl_longlink_mfc_t mfc;
722    int old_funcs, new_funcs = 1;
723
724    if (!filename)
725        return -EINVAL;
726
727    dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
728
729    if (request_firmware(&fw, filename, &dev->dev) == 0) {
730        if (fw->size >= CISTPL_MAX_CIS_SIZE) {
731            ret = -EINVAL;
732            dev_printk(KERN_ERR, &dev->dev,
733                   "pcmcia: CIS override is too big\n");
734            goto release;
735        }
736
737        if (!pcmcia_replace_cis(s, fw->data, fw->size))
738            ret = 0;
739        else {
740            dev_printk(KERN_ERR, &dev->dev,
741                   "pcmcia: CIS override failed\n");
742            goto release;
743        }
744
745        /* we need to re-start if the number of functions changed */
746        old_funcs = s->functions;
747        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
748                    &mfc))
749            new_funcs = mfc.nfn;
750
751        if (old_funcs != new_funcs)
752            ret = -EBUSY;
753
754        /* update information */
755        pcmcia_device_query(dev);
756
757        /* requery (as number of functions might have changed) */
758        pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
759    }
760 release:
761    release_firmware(fw);
762
763    return ret;
764}
765
766#else /* !CONFIG_PCMCIA_LOAD_CIS */
767
768static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
769{
770    return -ENODEV;
771}
772
773#endif
774
775
776static inline int pcmcia_devmatch(struct pcmcia_device *dev,
777                  struct pcmcia_device_id *did)
778{
779    if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
780        if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
781            return 0;
782    }
783
784    if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
785        if ((!dev->has_card_id) || (dev->card_id != did->card_id))
786            return 0;
787    }
788
789    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
790        if (dev->func != did->function)
791            return 0;
792    }
793
794    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
795        if (!dev->prod_id[0])
796            return 0;
797        if (strcmp(did->prod_id[0], dev->prod_id[0]))
798            return 0;
799    }
800
801    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
802        if (!dev->prod_id[1])
803            return 0;
804        if (strcmp(did->prod_id[1], dev->prod_id[1]))
805            return 0;
806    }
807
808    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
809        if (!dev->prod_id[2])
810            return 0;
811        if (strcmp(did->prod_id[2], dev->prod_id[2]))
812            return 0;
813    }
814
815    if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
816        if (!dev->prod_id[3])
817            return 0;
818        if (strcmp(did->prod_id[3], dev->prod_id[3]))
819            return 0;
820    }
821
822    if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
823        dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
824        mutex_lock(&dev->socket->ops_mutex);
825        dev->socket->pcmcia_state.has_pfc = 1;
826        mutex_unlock(&dev->socket->ops_mutex);
827        if (dev->device_no != did->device_no)
828            return 0;
829    }
830
831    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
832        int ret;
833
834        if ((!dev->has_func_id) || (dev->func_id != did->func_id))
835            return 0;
836
837        /* if this is a pseudo-multi-function device,
838         * we need explicit matches */
839        if (dev->socket->pcmcia_state.has_pfc)
840            return 0;
841        if (dev->device_no)
842            return 0;
843
844        /* also, FUNC_ID matching needs to be activated by userspace
845         * after it has re-checked that there is no possible module
846         * with a prod_id/manf_id/card_id match.
847         */
848        mutex_lock(&dev->socket->ops_mutex);
849        ret = dev->allow_func_id_match;
850        mutex_unlock(&dev->socket->ops_mutex);
851
852        if (!ret) {
853            dev_dbg(&dev->dev,
854                "skipping FUNC_ID match until userspace ACK\n");
855            return 0;
856        }
857    }
858
859    if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
860        dev_dbg(&dev->dev, "device needs a fake CIS\n");
861        if (!dev->socket->fake_cis)
862            if (pcmcia_load_firmware(dev, did->cisfile))
863                return 0;
864    }
865
866    if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
867        int i;
868        for (i = 0; i < 4; i++)
869            if (dev->prod_id[i])
870                return 0;
871        if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
872            return 0;
873    }
874
875    return 1;
876}
877
878
879static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
880{
881    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
882    struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
883    struct pcmcia_device_id *did = p_drv->id_table;
884    struct pcmcia_dynid *dynid;
885
886    /* match dynamic devices first */
887    mutex_lock(&p_drv->dynids.lock);
888    list_for_each_entry(dynid, &p_drv->dynids.list, node) {
889        dev_dbg(dev, "trying to match to %s\n", drv->name);
890        if (pcmcia_devmatch(p_dev, &dynid->id)) {
891            dev_dbg(dev, "matched to %s\n", drv->name);
892            mutex_unlock(&p_drv->dynids.lock);
893            return 1;
894        }
895    }
896    mutex_unlock(&p_drv->dynids.lock);
897
898#ifdef CONFIG_PCMCIA_IOCTL
899    /* matching by cardmgr */
900    if (p_dev->cardmgr == p_drv) {
901        dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
902        return 1;
903    }
904#endif
905
906    while (did && did->match_flags) {
907        dev_dbg(dev, "trying to match to %s\n", drv->name);
908        if (pcmcia_devmatch(p_dev, did)) {
909            dev_dbg(dev, "matched to %s\n", drv->name);
910            return 1;
911        }
912        did++;
913    }
914
915    return 0;
916}
917
918#ifdef CONFIG_HOTPLUG
919
920static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
921{
922    struct pcmcia_device *p_dev;
923    int i;
924    u32 hash[4] = { 0, 0, 0, 0};
925
926    if (!dev)
927        return -ENODEV;
928
929    p_dev = to_pcmcia_dev(dev);
930
931    /* calculate hashes */
932    for (i = 0; i < 4; i++) {
933        if (!p_dev->prod_id[i])
934            continue;
935        hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
936    }
937
938    if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
939        return -ENOMEM;
940
941    if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
942        return -ENOMEM;
943
944    if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
945               "pa%08Xpb%08Xpc%08Xpd%08X",
946               p_dev->has_manf_id ? p_dev->manf_id : 0,
947               p_dev->has_card_id ? p_dev->card_id : 0,
948               p_dev->has_func_id ? p_dev->func_id : 0,
949               p_dev->func,
950               p_dev->device_no,
951               hash[0],
952               hash[1],
953               hash[2],
954               hash[3]))
955        return -ENOMEM;
956
957    return 0;
958}
959
960#else
961
962static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
963{
964    return -ENODEV;
965}
966
967#endif
968
969/************************ runtime PM support ***************************/
970
971static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
972static int pcmcia_dev_resume(struct device *dev);
973
974static int runtime_suspend(struct device *dev)
975{
976    int rc;
977
978    device_lock(dev);
979    rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
980    device_unlock(dev);
981    return rc;
982}
983
984static int runtime_resume(struct device *dev)
985{
986    int rc;
987
988    device_lock(dev);
989    rc = pcmcia_dev_resume(dev);
990    device_unlock(dev);
991    return rc;
992}
993
994/************************ per-device sysfs output ***************************/
995
996#define pcmcia_device_attr(field, test, format) \
997static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
998{ \
999    struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1000    return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1001}
1002
1003#define pcmcia_device_stringattr(name, field) \
1004static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1005{ \
1006    struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1007    return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1008}
1009
1010pcmcia_device_attr(func, socket, "0x%02x\n");
1011pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1012pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1013pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1014pcmcia_device_stringattr(prod_id1, prod_id[0]);
1015pcmcia_device_stringattr(prod_id2, prod_id[1]);
1016pcmcia_device_stringattr(prod_id3, prod_id[2]);
1017pcmcia_device_stringattr(prod_id4, prod_id[3]);
1018
1019
1020static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1021{
1022    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1023
1024    if (p_dev->suspended)
1025        return sprintf(buf, "off\n");
1026    else
1027        return sprintf(buf, "on\n");
1028}
1029
1030static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1031                     const char *buf, size_t count)
1032{
1033    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1034    int ret = 0;
1035
1036    if (!count)
1037        return -EINVAL;
1038
1039    if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1040        ret = runtime_suspend(dev);
1041    else if (p_dev->suspended && !strncmp(buf, "on", 2))
1042        ret = runtime_resume(dev);
1043
1044    return ret ? ret : count;
1045}
1046
1047
1048static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1049{
1050    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1051    int i;
1052    u32 hash[4] = { 0, 0, 0, 0};
1053
1054    /* calculate hashes */
1055    for (i = 0; i < 4; i++) {
1056        if (!p_dev->prod_id[i])
1057            continue;
1058        hash[i] = crc32(0, p_dev->prod_id[i],
1059                strlen(p_dev->prod_id[i]));
1060    }
1061    return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1062                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1063                p_dev->has_manf_id ? p_dev->manf_id : 0,
1064                p_dev->has_card_id ? p_dev->card_id : 0,
1065                p_dev->has_func_id ? p_dev->func_id : 0,
1066                p_dev->func, p_dev->device_no,
1067                hash[0], hash[1], hash[2], hash[3]);
1068}
1069
1070static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1071        struct device_attribute *attr, const char *buf, size_t count)
1072{
1073    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1074
1075    if (!count)
1076        return -EINVAL;
1077
1078    mutex_lock(&p_dev->socket->ops_mutex);
1079    p_dev->allow_func_id_match = 1;
1080    mutex_unlock(&p_dev->socket->ops_mutex);
1081    pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1082
1083    return count;
1084}
1085
1086static struct device_attribute pcmcia_dev_attrs[] = {
1087    __ATTR(function, 0444, func_show, NULL),
1088    __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1089    __ATTR_RO(func_id),
1090    __ATTR_RO(manf_id),
1091    __ATTR_RO(card_id),
1092    __ATTR_RO(prod_id1),
1093    __ATTR_RO(prod_id2),
1094    __ATTR_RO(prod_id3),
1095    __ATTR_RO(prod_id4),
1096    __ATTR_RO(modalias),
1097    __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1098    __ATTR_NULL,
1099};
1100
1101/* PM support, also needed for reset */
1102
1103static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1104{
1105    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1106    struct pcmcia_driver *p_drv = NULL;
1107    int ret = 0;
1108
1109    mutex_lock(&p_dev->socket->ops_mutex);
1110    if (p_dev->suspended) {
1111        mutex_unlock(&p_dev->socket->ops_mutex);
1112        return 0;
1113    }
1114    p_dev->suspended = 1;
1115    mutex_unlock(&p_dev->socket->ops_mutex);
1116
1117    dev_dbg(dev, "suspending\n");
1118
1119    if (dev->driver)
1120        p_drv = to_pcmcia_drv(dev->driver);
1121
1122    if (!p_drv)
1123        goto out;
1124
1125    if (p_drv->suspend) {
1126        ret = p_drv->suspend(p_dev);
1127        if (ret) {
1128            dev_printk(KERN_ERR, dev,
1129                   "pcmcia: device %s (driver %s) did "
1130                   "not want to go to sleep (%d)\n",
1131                   p_dev->devname, p_drv->drv.name, ret);
1132            mutex_lock(&p_dev->socket->ops_mutex);
1133            p_dev->suspended = 0;
1134            mutex_unlock(&p_dev->socket->ops_mutex);
1135            goto out;
1136        }
1137    }
1138
1139    if (p_dev->device_no == p_dev->func) {
1140        dev_dbg(dev, "releasing configuration\n");
1141        pcmcia_release_configuration(p_dev);
1142    }
1143
1144 out:
1145    return ret;
1146}
1147
1148
1149static int pcmcia_dev_resume(struct device *dev)
1150{
1151    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1152    struct pcmcia_driver *p_drv = NULL;
1153    int ret = 0;
1154
1155    mutex_lock(&p_dev->socket->ops_mutex);
1156    if (!p_dev->suspended) {
1157        mutex_unlock(&p_dev->socket->ops_mutex);
1158        return 0;
1159    }
1160    p_dev->suspended = 0;
1161    mutex_unlock(&p_dev->socket->ops_mutex);
1162
1163    dev_dbg(dev, "resuming\n");
1164
1165    if (dev->driver)
1166        p_drv = to_pcmcia_drv(dev->driver);
1167
1168    if (!p_drv)
1169        goto out;
1170
1171    if (p_dev->device_no == p_dev->func) {
1172        dev_dbg(dev, "requesting configuration\n");
1173        ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1174        if (ret)
1175            goto out;
1176    }
1177
1178    if (p_drv->resume)
1179        ret = p_drv->resume(p_dev);
1180
1181 out:
1182    return ret;
1183}
1184
1185
1186static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1187{
1188    struct pcmcia_socket *skt = _data;
1189    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1190
1191    if (p_dev->socket != skt || p_dev->suspended)
1192        return 0;
1193
1194    return runtime_suspend(dev);
1195}
1196
1197static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1198{
1199    struct pcmcia_socket *skt = _data;
1200    struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1201
1202    if (p_dev->socket != skt || !p_dev->suspended)
1203        return 0;
1204
1205    runtime_resume(dev);
1206
1207    return 0;
1208}
1209
1210static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1211{
1212    dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1213    bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1214    return 0;
1215}
1216
1217static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1218{
1219    dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1220    if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1221                 pcmcia_bus_suspend_callback)) {
1222        pcmcia_bus_resume(skt);
1223        return -EIO;
1224    }
1225    return 0;
1226}
1227
1228
1229/*======================================================================
1230
1231    The card status event handler.
1232
1233======================================================================*/
1234
1235/* Normally, the event is passed to individual drivers after
1236 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1237 * is inversed to maintain historic compatibility.
1238 */
1239
1240static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1241{
1242    struct pcmcia_socket *s = pcmcia_get_socket(skt);
1243
1244    if (!s) {
1245        dev_printk(KERN_ERR, &skt->dev,
1246               "PCMCIA obtaining reference to socket " \
1247               "failed, event 0x%x lost!\n", event);
1248        return -ENODEV;
1249    }
1250
1251    dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1252           event, priority, skt);
1253
1254    switch (event) {
1255    case CS_EVENT_CARD_REMOVAL:
1256        atomic_set(&skt->present, 0);
1257        pcmcia_card_remove(skt, NULL);
1258        handle_event(skt, event);
1259        mutex_lock(&s->ops_mutex);
1260        destroy_cis_cache(s);
1261        mutex_unlock(&s->ops_mutex);
1262        break;
1263
1264    case CS_EVENT_CARD_INSERTION:
1265        atomic_set(&skt->present, 1);
1266        mutex_lock(&s->ops_mutex);
1267        s->pcmcia_state.has_pfc = 0;
1268        destroy_cis_cache(s); /* to be on the safe side... */
1269        mutex_unlock(&s->ops_mutex);
1270        pcmcia_card_add(skt);
1271        handle_event(skt, event);
1272        break;
1273
1274    case CS_EVENT_EJECTION_REQUEST:
1275        break;
1276
1277    case CS_EVENT_PM_RESUME:
1278        if (verify_cis_cache(skt) != 0) {
1279            dev_dbg(&skt->dev, "cis mismatch - different card\n");
1280            /* first, remove the card */
1281            ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1282            mutex_lock(&s->ops_mutex);
1283            destroy_cis_cache(skt);
1284            kfree(skt->fake_cis);
1285            skt->fake_cis = NULL;
1286            s->functions = 0;
1287            mutex_unlock(&s->ops_mutex);
1288            /* now, add the new card */
1289            ds_event(skt, CS_EVENT_CARD_INSERTION,
1290                 CS_EVENT_PRI_LOW);
1291        }
1292        handle_event(skt, event);
1293        break;
1294
1295    case CS_EVENT_PM_SUSPEND:
1296    case CS_EVENT_RESET_PHYSICAL:
1297    case CS_EVENT_CARD_RESET:
1298    default:
1299        handle_event(skt, event);
1300        break;
1301    }
1302
1303    pcmcia_put_socket(s);
1304
1305    return 0;
1306} /* ds_event */
1307
1308/*
1309 * NOTE: This is racy. There's no guarantee the card will still be
1310 * physically present, even if the call to this function returns
1311 * non-NULL. Furthermore, the device driver most likely is unbound
1312 * almost immediately, so the timeframe where pcmcia_dev_present
1313 * returns NULL is probably really really small.
1314 */
1315struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1316{
1317    struct pcmcia_device *p_dev;
1318    struct pcmcia_device *ret = NULL;
1319
1320    p_dev = pcmcia_get_dev(_p_dev);
1321    if (!p_dev)
1322        return NULL;
1323
1324    if (atomic_read(&p_dev->socket->present) != 0)
1325        ret = p_dev;
1326
1327    pcmcia_put_dev(p_dev);
1328    return ret;
1329}
1330EXPORT_SYMBOL(pcmcia_dev_present);
1331
1332
1333static struct pcmcia_callback pcmcia_bus_callback = {
1334    .owner = THIS_MODULE,
1335    .event = ds_event,
1336    .requery = pcmcia_requery,
1337    .validate = pccard_validate_cis,
1338    .suspend = pcmcia_bus_suspend,
1339    .resume = pcmcia_bus_resume,
1340};
1341
1342static int __devinit pcmcia_bus_add_socket(struct device *dev,
1343                       struct class_interface *class_intf)
1344{
1345    struct pcmcia_socket *socket = dev_get_drvdata(dev);
1346    int ret;
1347
1348    socket = pcmcia_get_socket(socket);
1349    if (!socket) {
1350        dev_printk(KERN_ERR, dev,
1351               "PCMCIA obtaining reference to socket failed\n");
1352        return -ENODEV;
1353    }
1354
1355    ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1356    if (ret) {
1357        dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1358        pcmcia_put_socket(socket);
1359        return ret;
1360    }
1361
1362#ifdef CONFIG_PCMCIA_IOCTL
1363    init_waitqueue_head(&socket->queue);
1364#endif
1365    INIT_LIST_HEAD(&socket->devices_list);
1366    memset(&socket->pcmcia_state, 0, sizeof(u8));
1367    socket->device_count = 0;
1368
1369    ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1370    if (ret) {
1371        dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1372        pcmcia_put_socket(socket);
1373        return ret;
1374    }
1375
1376    atomic_set(&socket->present, 0);
1377
1378    return 0;
1379}
1380
1381static void pcmcia_bus_remove_socket(struct device *dev,
1382                     struct class_interface *class_intf)
1383{
1384    struct pcmcia_socket *socket = dev_get_drvdata(dev);
1385
1386    if (!socket)
1387        return;
1388
1389    pccard_register_pcmcia(socket, NULL);
1390
1391    /* unregister any unbound devices */
1392    mutex_lock(&socket->skt_mutex);
1393    pcmcia_card_remove(socket, NULL);
1394    release_cis_mem(socket);
1395    mutex_unlock(&socket->skt_mutex);
1396
1397    sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1398
1399    pcmcia_put_socket(socket);
1400
1401    return;
1402}
1403
1404
1405/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1406static struct class_interface pcmcia_bus_interface __refdata = {
1407    .class = &pcmcia_socket_class,
1408    .add_dev = &pcmcia_bus_add_socket,
1409    .remove_dev = &pcmcia_bus_remove_socket,
1410};
1411
1412
1413struct bus_type pcmcia_bus_type = {
1414    .name = "pcmcia",
1415    .uevent = pcmcia_bus_uevent,
1416    .match = pcmcia_bus_match,
1417    .dev_attrs = pcmcia_dev_attrs,
1418    .probe = pcmcia_device_probe,
1419    .remove = pcmcia_device_remove,
1420    .suspend = pcmcia_dev_suspend,
1421    .resume = pcmcia_dev_resume,
1422};
1423
1424
1425static int __init init_pcmcia_bus(void)
1426{
1427    int ret;
1428
1429    ret = bus_register(&pcmcia_bus_type);
1430    if (ret < 0) {
1431        printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1432        return ret;
1433    }
1434    ret = class_interface_register(&pcmcia_bus_interface);
1435    if (ret < 0) {
1436        printk(KERN_WARNING
1437            "pcmcia: class_interface_register error: %d\n", ret);
1438        bus_unregister(&pcmcia_bus_type);
1439        return ret;
1440    }
1441
1442    pcmcia_setup_ioctl();
1443
1444    return 0;
1445}
1446fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1447                   * pcmcia_socket_class is already registered */
1448
1449
1450static void __exit exit_pcmcia_bus(void)
1451{
1452    pcmcia_cleanup_ioctl();
1453
1454    class_interface_unregister(&pcmcia_bus_interface);
1455
1456    bus_unregister(&pcmcia_bus_type);
1457}
1458module_exit(exit_pcmcia_bus);
1459
1460
1461MODULE_ALIAS("ds");
1462

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