2 * ds.c -- 16-bit PCMCIA core support
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.
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.
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2006 Dominik Brodowski
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>
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>
35 #include "cs_internal.h"
37 /*====================================================================*/
39 /* Module parameters */
41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42 MODULE_DESCRIPTION("PCMCIA Driver Services");
43 MODULE_LICENSE("GPL");
46 /*====================================================================*/
48 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
50 struct pcmcia_device_id *did = p_drv->id_table;
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);
58 while (did && did->match_flags) {
59 for (i = 0; i < 4; i++) {
63 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
64 if (hash == did->prod_id_hash[i])
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 "
82 /*======================================================================*/
86 struct list_head node;
87 struct pcmcia_device_id id;
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
96 * Adds a new dynamic PCMCIA device ID to this driver,
97 * and causes the driver to probe for all devices again.
100 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
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};
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]);
116 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
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);
128 mutex_lock(&pdrv->dynids.lock);
129 list_add_tail(&dynid->node, &pdrv->dynids.list);
130 mutex_unlock(&pdrv->dynids.lock);
132 if (get_driver(&pdrv->drv)) {
133 retval = driver_attach(&pdrv->drv);
134 put_driver(&pdrv->drv);
141 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
144 pcmcia_free_dynids(struct pcmcia_driver *drv)
146 struct pcmcia_dynid *dynid, *n;
148 mutex_lock(&drv->dynids.lock);
149 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
150 list_del(&dynid->node);
153 mutex_unlock(&drv->dynids.lock);
157 pcmcia_create_newid_file(struct pcmcia_driver *drv)
160 if (drv->probe != NULL)
161 error = driver_create_file(&drv->drv, &driver_attr_new_id);
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
170 * Registers a PCMCIA driver with the PCMCIA bus core.
172 int pcmcia_register_driver(struct pcmcia_driver *driver)
179 pcmcia_check_driver(driver);
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);
187 pr_debug("registering driver %s\n", driver->drv.name);
189 error = driver_register(&driver->drv);
193 error = pcmcia_create_newid_file(driver);
195 driver_unregister(&driver->drv);
199 EXPORT_SYMBOL(pcmcia_register_driver);
202 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
203 * @driver: the &driver being unregistered
205 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207 pr_debug("unregistering driver %s\n", driver->drv.name);
208 driver_unregister(&driver->drv);
209 pcmcia_free_dynids(driver);
211 EXPORT_SYMBOL(pcmcia_unregister_driver);
214 /* pcmcia_device handling */
216 struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
218 struct device *tmp_dev;
219 tmp_dev = get_device(&p_dev->dev);
222 return to_pcmcia_dev(tmp_dev);
225 void pcmcia_put_dev(struct pcmcia_device *p_dev)
228 put_device(&p_dev->dev);
231 static void pcmcia_release_function(struct kref *ref)
233 struct config_t *c = container_of(ref, struct config_t, ref);
234 pr_debug("releasing config_t\n");
238 static void pcmcia_release_dev(struct device *dev)
240 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
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);
252 static int pcmcia_device_probe(struct device *dev)
254 struct pcmcia_device *p_dev;
255 struct pcmcia_driver *p_drv;
256 struct pcmcia_socket *s;
257 cistpl_config_t cis_config;
260 dev = get_device(dev);
264 p_dev = to_pcmcia_dev(dev);
265 p_drv = to_pcmcia_drv(dev->driver);
268 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
270 if ((!p_drv->probe) || (!p_dev->function_config) ||
271 (!try_module_get(p_drv->owner))) {
276 /* set up some more device information */
277 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280 p_dev->conf.ConfigBase = cis_config.base;
281 p_dev->conf.Present = cis_config.rmask[0];
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;
289 ret = p_drv->probe(p_dev);
291 dev_dbg(dev, "binding to %s failed with %d\n",
292 p_drv->drv.name, ret);
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);
304 module_put(p_drv->owner);
313 * Removes a PCMCIA card from the device tree and socket list.
315 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
317 struct pcmcia_device *p_dev;
318 struct pcmcia_device *tmp;
320 dev_dbg(leftover ? &leftover->dev : &s->dev,
321 "pcmcia_card_remove(%d) %s\n", s->sock,
322 leftover ? leftover->devname : "");
324 mutex_lock(&s->ops_mutex);
329 mutex_unlock(&s->ops_mutex);
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)
336 mutex_lock(&s->ops_mutex);
337 list_del(&p_dev->socket_device_list);
339 mutex_unlock(&s->ops_mutex);
341 dev_dbg(&p_dev->dev, "unregistering device\n");
342 device_unregister(&p_dev->dev);
348 static int pcmcia_device_remove(struct device *dev)
350 struct pcmcia_device *p_dev;
351 struct pcmcia_driver *p_drv;
354 p_dev = to_pcmcia_dev(dev);
355 p_drv = to_pcmcia_drv(dev->driver);
357 dev_dbg(dev, "removing device\n");
359 /* If we're removing the primary module driving a
360 * pseudo multi-function card, we need to unbind
363 if ((p_dev->socket->pcmcia_state.has_pfc) &&
364 (p_dev->socket->device_count > 0) &&
365 (p_dev->device_no == 0))
366 pcmcia_card_remove(p_dev->socket, p_dev);
368 /* detach the "instance" */
373 p_drv->remove(p_dev);
375 p_dev->dev_node = NULL;
377 /* check for proper unloading */
378 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
379 dev_printk(KERN_INFO, dev,
380 "pcmcia: driver %s did not release config properly\n",
383 for (i = 0; i < MAX_WIN; i++)
384 if (p_dev->_win & CLIENT_WIN_REQ(i))
385 dev_printk(KERN_INFO, dev,
386 "pcmcia: driver %s did not release window properly\n",
389 /* references from pcmcia_probe_device */
390 pcmcia_put_dev(p_dev);
391 module_put(p_drv->owner);
398 * pcmcia_device_query -- determine information about a pcmcia device
400 static int pcmcia_device_query(struct pcmcia_device *p_dev)
402 cistpl_manfid_t manf_id;
403 cistpl_funcid_t func_id;
404 cistpl_vers_1_t *vers1;
407 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
411 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
412 CISTPL_MANFID, &manf_id)) {
413 mutex_lock(&p_dev->socket->ops_mutex);
414 p_dev->manf_id = manf_id.manf;
415 p_dev->card_id = manf_id.card;
416 p_dev->has_manf_id = 1;
417 p_dev->has_card_id = 1;
418 mutex_unlock(&p_dev->socket->ops_mutex);
421 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
422 CISTPL_FUNCID, &func_id)) {
423 mutex_lock(&p_dev->socket->ops_mutex);
424 p_dev->func_id = func_id.func;
425 p_dev->has_func_id = 1;
426 mutex_unlock(&p_dev->socket->ops_mutex);
428 /* rule of thumb: cards with no FUNCID, but with
429 * common memory device geometry information, are
430 * probably memory cards (from pcmcia-cs) */
431 cistpl_device_geo_t *devgeo;
433 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
438 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
439 CISTPL_DEVICE_GEO, devgeo)) {
441 "mem device geometry probably means "
443 mutex_lock(&p_dev->socket->ops_mutex);
444 p_dev->func_id = CISTPL_FUNCID_MEMORY;
445 p_dev->has_func_id = 1;
446 mutex_unlock(&p_dev->socket->ops_mutex);
451 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
453 mutex_lock(&p_dev->socket->ops_mutex);
454 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
459 tmp = vers1->str + vers1->ofs[i];
461 length = strlen(tmp) + 1;
462 if ((length < 2) || (length > 255))
465 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
469 new = strncpy(new, tmp, length);
471 tmp = p_dev->prod_id[i];
472 p_dev->prod_id[i] = new;
475 mutex_unlock(&p_dev->socket->ops_mutex);
483 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
484 * Serializes pcmcia_device_add; will most likely be removed in future.
486 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
487 * won't work, this doesn't matter much at the moment: the driver core doesn't
490 static DEFINE_MUTEX(device_add_lock);
492 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
494 struct pcmcia_device *p_dev, *tmp_dev;
497 s = pcmcia_get_socket(s);
501 mutex_lock(&device_add_lock);
503 pr_debug("adding device to %d, function %d\n", s->sock, function);
505 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
509 mutex_lock(&s->ops_mutex);
510 p_dev->device_no = (s->device_count++);
511 mutex_unlock(&s->ops_mutex);
513 /* max of 2 PFC devices */
514 if ((p_dev->device_no >= 2) && (function == 0))
517 /* max of 4 devices overall */
518 if (p_dev->device_no >= 4)
522 p_dev->func = function;
524 p_dev->dev.bus = &pcmcia_bus_type;
525 p_dev->dev.parent = s->dev.parent;
526 p_dev->dev.release = pcmcia_release_dev;
527 /* by default don't allow DMA */
528 p_dev->dma_mask = DMA_MASK_NONE;
529 p_dev->dev.dma_mask = &p_dev->dma_mask;
530 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
531 if (!dev_name(&p_dev->dev))
533 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
536 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
538 mutex_lock(&s->ops_mutex);
541 * p_dev->function_config must be the same for all card functions.
542 * Note that this is serialized by the device_add_lock, so that
543 * only one such struct will be created.
545 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
546 if (p_dev->func == tmp_dev->func) {
547 p_dev->function_config = tmp_dev->function_config;
548 p_dev->io = tmp_dev->io;
549 p_dev->irq = tmp_dev->irq;
550 kref_get(&p_dev->function_config->ref);
553 /* Add to the list in pcmcia_bus_socket */
554 list_add(&p_dev->socket_device_list, &s->devices_list);
556 mutex_unlock(&s->ops_mutex);
558 if (!p_dev->function_config) {
559 dev_dbg(&p_dev->dev, "creating config_t\n");
560 p_dev->function_config = kzalloc(sizeof(struct config_t),
562 if (!p_dev->function_config)
564 kref_init(&p_dev->function_config->ref);
567 dev_printk(KERN_NOTICE, &p_dev->dev,
568 "pcmcia: registering new device %s\n",
571 pcmcia_device_query(p_dev);
573 if (device_register(&p_dev->dev))
576 mutex_unlock(&device_add_lock);
581 mutex_lock(&s->ops_mutex);
582 list_del(&p_dev->socket_device_list);
583 mutex_unlock(&s->ops_mutex);
586 mutex_lock(&s->ops_mutex);
588 mutex_unlock(&s->ops_mutex);
590 for (i = 0; i < 4; i++)
591 kfree(p_dev->prod_id[i]);
592 kfree(p_dev->devname);
595 mutex_unlock(&device_add_lock);
596 pcmcia_put_socket(s);
602 static int pcmcia_card_add(struct pcmcia_socket *s)
604 cistpl_longlink_mfc_t mfc;
605 unsigned int no_funcs, i, no_chains;
608 mutex_lock(&s->ops_mutex);
609 if (!(s->resource_setup_done)) {
611 "no resources available, delaying card_add\n");
612 mutex_unlock(&s->ops_mutex);
613 return -EAGAIN; /* try again, but later... */
616 if (pcmcia_validate_mem(s)) {
617 dev_dbg(&s->dev, "validating mem resources failed, "
618 "delaying card_add\n");
619 mutex_unlock(&s->ops_mutex);
620 return -EAGAIN; /* try again, but later... */
622 mutex_unlock(&s->ops_mutex);
624 ret = pccard_validate_cis(s, &no_chains);
625 if (ret || !no_chains) {
626 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
630 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
634 s->functions = no_funcs;
636 for (i = 0; i < no_funcs; i++)
637 pcmcia_device_add(s, i);
643 static int pcmcia_requery_callback(struct device *dev, void * _data)
645 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
646 if (!p_dev->dev.driver) {
647 dev_dbg(dev, "update device information\n");
648 pcmcia_device_query(p_dev);
655 static void pcmcia_requery(struct pcmcia_socket *s)
657 int present, has_pfc;
659 mutex_lock(&s->ops_mutex);
660 present = s->pcmcia_state.present;
661 mutex_unlock(&s->ops_mutex);
666 if (s->functions == 0) {
671 /* some device information might have changed because of a CIS
672 * update or because we can finally read it correctly... so
673 * determine it again, overwriting old values if necessary. */
674 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
676 /* if the CIS changed, we need to check whether the number of
677 * functions changed. */
679 int old_funcs, new_funcs;
680 cistpl_longlink_mfc_t mfc;
682 /* does this cis override add or remove functions? */
683 old_funcs = s->functions;
685 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
690 if (old_funcs != new_funcs) {
691 /* we need to re-start */
692 pcmcia_card_remove(s, NULL);
697 /* If the PCMCIA device consists of two pseudo devices,
698 * call pcmcia_device_add() -- which will fail if both
699 * devices are already registered. */
700 mutex_lock(&s->ops_mutex);
701 has_pfc = s->pcmcia_state.has_pfc;
702 mutex_unlock(&s->ops_mutex);
704 pcmcia_device_add(s, 0);
706 /* we re-scan all devices, not just the ones connected to this
707 * socket. This does not matter, though. */
708 if (bus_rescan_devices(&pcmcia_bus_type))
709 dev_warn(&s->dev, "rescanning the bus failed\n");
713 #ifdef CONFIG_PCMCIA_LOAD_CIS
716 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
717 * @dev: the pcmcia device which needs a CIS override
718 * @filename: requested filename in /lib/firmware/
720 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
721 * the one provided by the card is broken. The firmware files reside in
722 * /lib/firmware/ in userspace.
724 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
726 struct pcmcia_socket *s = dev->socket;
727 const struct firmware *fw;
729 cistpl_longlink_mfc_t mfc;
730 int old_funcs, new_funcs = 1;
735 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
737 if (request_firmware(&fw, filename, &dev->dev) == 0) {
738 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
740 dev_printk(KERN_ERR, &dev->dev,
741 "pcmcia: CIS override is too big\n");
745 if (!pcmcia_replace_cis(s, fw->data, fw->size))
748 dev_printk(KERN_ERR, &dev->dev,
749 "pcmcia: CIS override failed\n");
753 /* we need to re-start if the number of functions changed */
754 old_funcs = s->functions;
755 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
759 if (old_funcs != new_funcs)
762 /* update information */
763 pcmcia_device_query(dev);
765 /* requery (as number of functions might have changed) */
766 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
769 release_firmware(fw);
774 #else /* !CONFIG_PCMCIA_LOAD_CIS */
776 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
784 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
785 struct pcmcia_device_id *did)
787 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
788 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
793 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
798 if (dev->func != did->function)
802 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
803 if (!dev->prod_id[0])
805 if (strcmp(did->prod_id[0], dev->prod_id[0]))
809 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
810 if (!dev->prod_id[1])
812 if (strcmp(did->prod_id[1], dev->prod_id[1]))
816 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
817 if (!dev->prod_id[2])
819 if (strcmp(did->prod_id[2], dev->prod_id[2]))
823 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
824 if (!dev->prod_id[3])
826 if (strcmp(did->prod_id[3], dev->prod_id[3]))
830 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
831 if (dev->device_no != did->device_no)
833 mutex_lock(&dev->socket->ops_mutex);
834 dev->socket->pcmcia_state.has_pfc = 1;
835 mutex_unlock(&dev->socket->ops_mutex);
838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
841 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
844 /* if this is a pseudo-multi-function device,
845 * we need explicit matches */
846 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
851 /* also, FUNC_ID matching needs to be activated by userspace
852 * after it has re-checked that there is no possible module
853 * with a prod_id/manf_id/card_id match.
855 mutex_lock(&dev->socket->ops_mutex);
856 ret = dev->allow_func_id_match;
857 mutex_unlock(&dev->socket->ops_mutex);
861 "skipping FUNC_ID match until userspace ACK\n");
866 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
867 dev_dbg(&dev->dev, "device needs a fake CIS\n");
868 if (!dev->socket->fake_cis)
869 if (pcmcia_load_firmware(dev, did->cisfile))
873 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
875 for (i = 0; i < 4; i++)
878 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
886 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
888 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
889 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
890 struct pcmcia_device_id *did = p_drv->id_table;
891 struct pcmcia_dynid *dynid;
893 /* match dynamic devices first */
894 mutex_lock(&p_drv->dynids.lock);
895 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
896 dev_dbg(dev, "trying to match to %s\n", drv->name);
897 if (pcmcia_devmatch(p_dev, &dynid->id)) {
898 dev_dbg(dev, "matched to %s\n", drv->name);
899 mutex_unlock(&p_drv->dynids.lock);
903 mutex_unlock(&p_drv->dynids.lock);
905 #ifdef CONFIG_PCMCIA_IOCTL
906 /* matching by cardmgr */
907 if (p_dev->cardmgr == p_drv) {
908 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
913 while (did && did->match_flags) {
914 dev_dbg(dev, "trying to match to %s\n", drv->name);
915 if (pcmcia_devmatch(p_dev, did)) {
916 dev_dbg(dev, "matched to %s\n", drv->name);
925 #ifdef CONFIG_HOTPLUG
927 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
929 struct pcmcia_device *p_dev;
931 u32 hash[4] = { 0, 0, 0, 0};
936 p_dev = to_pcmcia_dev(dev);
938 /* calculate hashes */
939 for (i = 0; i < 4; i++) {
940 if (!p_dev->prod_id[i])
942 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
945 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
948 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
951 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
952 "pa%08Xpb%08Xpc%08Xpd%08X",
953 p_dev->has_manf_id ? p_dev->manf_id : 0,
954 p_dev->has_card_id ? p_dev->card_id : 0,
955 p_dev->has_func_id ? p_dev->func_id : 0,
969 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
976 /************************ runtime PM support ***************************/
978 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
979 static int pcmcia_dev_resume(struct device *dev);
981 static int runtime_suspend(struct device *dev)
986 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
991 static int runtime_resume(struct device *dev)
996 rc = pcmcia_dev_resume(dev);
1001 /************************ per-device sysfs output ***************************/
1003 #define pcmcia_device_attr(field, test, format) \
1004 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1006 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1007 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1010 #define pcmcia_device_stringattr(name, field) \
1011 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1014 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1017 pcmcia_device_attr(func, socket, "0x%02x\n");
1018 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1019 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1020 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1021 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1022 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1023 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1024 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1027 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1029 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1031 if (p_dev->suspended)
1032 return sprintf(buf, "off\n");
1034 return sprintf(buf, "on\n");
1037 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1038 const char *buf, size_t count)
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1046 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1047 ret = runtime_suspend(dev);
1048 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1049 ret = runtime_resume(dev);
1051 return ret ? ret : count;
1055 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1057 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1059 u32 hash[4] = { 0, 0, 0, 0};
1061 /* calculate hashes */
1062 for (i = 0; i < 4; i++) {
1063 if (!p_dev->prod_id[i])
1065 hash[i] = crc32(0, p_dev->prod_id[i],
1066 strlen(p_dev->prod_id[i]));
1068 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1069 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1070 p_dev->has_manf_id ? p_dev->manf_id : 0,
1071 p_dev->has_card_id ? p_dev->card_id : 0,
1072 p_dev->has_func_id ? p_dev->func_id : 0,
1073 p_dev->func, p_dev->device_no,
1074 hash[0], hash[1], hash[2], hash[3]);
1077 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1078 struct device_attribute *attr, const char *buf, size_t count)
1080 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1085 mutex_lock(&p_dev->socket->ops_mutex);
1086 p_dev->allow_func_id_match = 1;
1087 mutex_unlock(&p_dev->socket->ops_mutex);
1088 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1093 static struct device_attribute pcmcia_dev_attrs[] = {
1094 __ATTR(function, 0444, func_show, NULL),
1095 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1099 __ATTR_RO(prod_id1),
1100 __ATTR_RO(prod_id2),
1101 __ATTR_RO(prod_id3),
1102 __ATTR_RO(prod_id4),
1103 __ATTR_RO(modalias),
1104 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1108 /* PM support, also needed for reset */
1110 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1112 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1113 struct pcmcia_driver *p_drv = NULL;
1116 mutex_lock(&p_dev->socket->ops_mutex);
1117 if (p_dev->suspended) {
1118 mutex_unlock(&p_dev->socket->ops_mutex);
1121 p_dev->suspended = 1;
1122 mutex_unlock(&p_dev->socket->ops_mutex);
1124 dev_dbg(dev, "suspending\n");
1127 p_drv = to_pcmcia_drv(dev->driver);
1132 if (p_drv->suspend) {
1133 ret = p_drv->suspend(p_dev);
1135 dev_printk(KERN_ERR, dev,
1136 "pcmcia: device %s (driver %s) did "
1137 "not want to go to sleep (%d)\n",
1138 p_dev->devname, p_drv->drv.name, ret);
1139 mutex_lock(&p_dev->socket->ops_mutex);
1140 p_dev->suspended = 0;
1141 mutex_unlock(&p_dev->socket->ops_mutex);
1146 if (p_dev->device_no == p_dev->func) {
1147 dev_dbg(dev, "releasing configuration\n");
1148 pcmcia_release_configuration(p_dev);
1156 static int pcmcia_dev_resume(struct device *dev)
1158 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1159 struct pcmcia_driver *p_drv = NULL;
1162 mutex_lock(&p_dev->socket->ops_mutex);
1163 if (!p_dev->suspended) {
1164 mutex_unlock(&p_dev->socket->ops_mutex);
1167 p_dev->suspended = 0;
1168 mutex_unlock(&p_dev->socket->ops_mutex);
1170 dev_dbg(dev, "resuming\n");
1173 p_drv = to_pcmcia_drv(dev->driver);
1178 if (p_dev->device_no == p_dev->func) {
1179 dev_dbg(dev, "requesting configuration\n");
1180 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1186 ret = p_drv->resume(p_dev);
1193 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1195 struct pcmcia_socket *skt = _data;
1196 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1198 if (p_dev->socket != skt || p_dev->suspended)
1201 return runtime_suspend(dev);
1204 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1206 struct pcmcia_socket *skt = _data;
1207 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1209 if (p_dev->socket != skt || !p_dev->suspended)
1212 runtime_resume(dev);
1217 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1219 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1220 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1224 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1226 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1227 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1228 pcmcia_bus_suspend_callback)) {
1229 pcmcia_bus_resume(skt);
1236 /*======================================================================
1238 The card status event handler.
1240 ======================================================================*/
1242 /* Normally, the event is passed to individual drivers after
1243 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1244 * is inversed to maintain historic compatibility.
1247 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1249 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1252 dev_printk(KERN_ERR, &skt->dev,
1253 "PCMCIA obtaining reference to socket " \
1254 "failed, event 0x%x lost!\n", event);
1258 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1259 event, priority, skt);
1262 case CS_EVENT_CARD_REMOVAL:
1263 mutex_lock(&s->ops_mutex);
1264 s->pcmcia_state.present = 0;
1265 mutex_unlock(&s->ops_mutex);
1266 pcmcia_card_remove(skt, NULL);
1267 handle_event(skt, event);
1268 mutex_lock(&s->ops_mutex);
1269 destroy_cis_cache(s);
1270 mutex_unlock(&s->ops_mutex);
1273 case CS_EVENT_CARD_INSERTION:
1274 mutex_lock(&s->ops_mutex);
1275 s->pcmcia_state.has_pfc = 0;
1276 s->pcmcia_state.present = 1;
1277 destroy_cis_cache(s); /* to be on the safe side... */
1278 mutex_unlock(&s->ops_mutex);
1279 pcmcia_card_add(skt);
1280 handle_event(skt, event);
1283 case CS_EVENT_EJECTION_REQUEST:
1286 case CS_EVENT_PM_RESUME:
1287 if (verify_cis_cache(skt) != 0) {
1288 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1289 /* first, remove the card */
1290 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1291 mutex_lock(&s->ops_mutex);
1292 destroy_cis_cache(skt);
1293 kfree(skt->fake_cis);
1294 skt->fake_cis = NULL;
1295 mutex_unlock(&s->ops_mutex);
1296 /* now, add the new card */
1297 ds_event(skt, CS_EVENT_CARD_INSERTION,
1300 handle_event(skt, event);
1303 case CS_EVENT_PM_SUSPEND:
1304 case CS_EVENT_RESET_PHYSICAL:
1305 case CS_EVENT_CARD_RESET:
1307 handle_event(skt, event);
1311 pcmcia_put_socket(s);
1317 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1319 struct pcmcia_device *p_dev;
1320 struct pcmcia_device *ret = NULL;
1322 p_dev = pcmcia_get_dev(_p_dev);
1326 mutex_lock(&p_dev->socket->ops_mutex);
1327 if (!p_dev->socket->pcmcia_state.present)
1330 if (p_dev->socket->pcmcia_state.dead)
1333 if (p_dev->_removed)
1336 if (p_dev->suspended)
1341 mutex_unlock(&p_dev->socket->ops_mutex);
1342 pcmcia_put_dev(p_dev);
1345 EXPORT_SYMBOL(pcmcia_dev_present);
1348 static struct pcmcia_callback pcmcia_bus_callback = {
1349 .owner = THIS_MODULE,
1351 .requery = pcmcia_requery,
1352 .validate = pccard_validate_cis,
1353 .suspend = pcmcia_bus_suspend,
1354 .resume = pcmcia_bus_resume,
1357 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1358 struct class_interface *class_intf)
1360 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1363 socket = pcmcia_get_socket(socket);
1365 dev_printk(KERN_ERR, dev,
1366 "PCMCIA obtaining reference to socket failed\n");
1370 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1372 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1373 pcmcia_put_socket(socket);
1377 #ifdef CONFIG_PCMCIA_IOCTL
1378 init_waitqueue_head(&socket->queue);
1380 INIT_LIST_HEAD(&socket->devices_list);
1381 memset(&socket->pcmcia_state, 0, sizeof(u8));
1382 socket->device_count = 0;
1384 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1386 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1387 pcmcia_put_socket(socket);
1394 static void pcmcia_bus_remove_socket(struct device *dev,
1395 struct class_interface *class_intf)
1397 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1402 mutex_lock(&socket->ops_mutex);
1403 socket->pcmcia_state.dead = 1;
1404 mutex_unlock(&socket->ops_mutex);
1406 pccard_register_pcmcia(socket, NULL);
1408 /* unregister any unbound devices */
1409 mutex_lock(&socket->skt_mutex);
1410 pcmcia_card_remove(socket, NULL);
1411 release_cis_mem(socket);
1412 mutex_unlock(&socket->skt_mutex);
1414 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1416 pcmcia_put_socket(socket);
1422 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1423 static struct class_interface pcmcia_bus_interface __refdata = {
1424 .class = &pcmcia_socket_class,
1425 .add_dev = &pcmcia_bus_add_socket,
1426 .remove_dev = &pcmcia_bus_remove_socket,
1430 struct bus_type pcmcia_bus_type = {
1432 .uevent = pcmcia_bus_uevent,
1433 .match = pcmcia_bus_match,
1434 .dev_attrs = pcmcia_dev_attrs,
1435 .probe = pcmcia_device_probe,
1436 .remove = pcmcia_device_remove,
1437 .suspend = pcmcia_dev_suspend,
1438 .resume = pcmcia_dev_resume,
1442 static int __init init_pcmcia_bus(void)
1446 ret = bus_register(&pcmcia_bus_type);
1448 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1451 ret = class_interface_register(&pcmcia_bus_interface);
1454 "pcmcia: class_interface_register error: %d\n", ret);
1455 bus_unregister(&pcmcia_bus_type);
1459 pcmcia_setup_ioctl();
1463 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1464 * pcmcia_socket_class is already registered */
1467 static void __exit exit_pcmcia_bus(void)
1469 pcmcia_cleanup_ioctl();
1471 class_interface_unregister(&pcmcia_bus_interface);
1473 bus_unregister(&pcmcia_bus_type);
1475 module_exit(exit_pcmcia_bus);