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);
338 mutex_unlock(&s->ops_mutex);
340 dev_dbg(&p_dev->dev, "unregistering device\n");
341 device_unregister(&p_dev->dev);
347 static int pcmcia_device_remove(struct device *dev)
349 struct pcmcia_device *p_dev;
350 struct pcmcia_driver *p_drv;
353 p_dev = to_pcmcia_dev(dev);
354 p_drv = to_pcmcia_drv(dev->driver);
356 dev_dbg(dev, "removing device\n");
358 /* If we're removing the primary module driving a
359 * pseudo multi-function card, we need to unbind
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);
367 /* detach the "instance" */
372 p_drv->remove(p_dev);
374 p_dev->dev_node = NULL;
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",
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",
388 /* references from pcmcia_probe_device */
389 pcmcia_put_dev(p_dev);
390 module_put(p_drv->owner);
397 * pcmcia_device_query -- determine information about a pcmcia device
399 static int pcmcia_device_query(struct pcmcia_device *p_dev)
401 cistpl_manfid_t manf_id;
402 cistpl_funcid_t func_id;
403 cistpl_vers_1_t *vers1;
406 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
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);
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);
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;
432 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
437 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
438 CISTPL_DEVICE_GEO, devgeo)) {
440 "mem device geometry probably means "
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);
450 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
452 mutex_lock(&p_dev->socket->ops_mutex);
453 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
458 tmp = vers1->str + vers1->ofs[i];
460 length = strlen(tmp) + 1;
461 if ((length < 2) || (length > 255))
464 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
468 new = strncpy(new, tmp, length);
470 tmp = p_dev->prod_id[i];
471 p_dev->prod_id[i] = new;
474 mutex_unlock(&p_dev->socket->ops_mutex);
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.
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
489 static DEFINE_MUTEX(device_add_lock);
491 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
493 struct pcmcia_device *p_dev, *tmp_dev;
496 s = pcmcia_get_socket(s);
500 mutex_lock(&device_add_lock);
502 pr_debug("adding device to %d, function %d\n", s->sock, function);
504 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
508 mutex_lock(&s->ops_mutex);
509 p_dev->device_no = (s->device_count++);
510 mutex_unlock(&s->ops_mutex);
512 /* max of 2 PFC devices */
513 if ((p_dev->device_no >= 2) && (function == 0))
516 /* max of 4 devices overall */
517 if (p_dev->device_no >= 4)
521 p_dev->func = function;
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))
532 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
535 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
537 mutex_lock(&s->ops_mutex);
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.
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);
552 /* Add to the list in pcmcia_bus_socket */
553 list_add(&p_dev->socket_device_list, &s->devices_list);
555 if (pcmcia_setup_irq(p_dev))
556 dev_warn(&p_dev->dev,
557 "IRQ setup failed -- device might not work\n");
559 if (!p_dev->function_config) {
560 dev_dbg(&p_dev->dev, "creating config_t\n");
561 p_dev->function_config = kzalloc(sizeof(struct config_t),
563 if (!p_dev->function_config) {
564 mutex_unlock(&s->ops_mutex);
567 kref_init(&p_dev->function_config->ref);
569 mutex_unlock(&s->ops_mutex);
571 dev_printk(KERN_NOTICE, &p_dev->dev,
572 "pcmcia: registering new device %s (IRQ: %d)\n",
573 p_dev->devname, p_dev->irq);
575 pcmcia_device_query(p_dev);
577 if (device_register(&p_dev->dev))
580 mutex_unlock(&device_add_lock);
585 mutex_lock(&s->ops_mutex);
586 list_del(&p_dev->socket_device_list);
587 mutex_unlock(&s->ops_mutex);
590 mutex_lock(&s->ops_mutex);
592 mutex_unlock(&s->ops_mutex);
594 for (i = 0; i < 4; i++)
595 kfree(p_dev->prod_id[i]);
596 kfree(p_dev->devname);
599 mutex_unlock(&device_add_lock);
600 pcmcia_put_socket(s);
606 static int pcmcia_card_add(struct pcmcia_socket *s)
608 cistpl_longlink_mfc_t mfc;
609 unsigned int no_funcs, i, no_chains;
612 mutex_lock(&s->ops_mutex);
613 if (!(s->resource_setup_done)) {
615 "no resources available, delaying card_add\n");
616 mutex_unlock(&s->ops_mutex);
617 return -EAGAIN; /* try again, but later... */
620 if (pcmcia_validate_mem(s)) {
621 dev_dbg(&s->dev, "validating mem resources failed, "
622 "delaying card_add\n");
623 mutex_unlock(&s->ops_mutex);
624 return -EAGAIN; /* try again, but later... */
626 mutex_unlock(&s->ops_mutex);
628 ret = pccard_validate_cis(s, &no_chains);
629 if (ret || !no_chains) {
630 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
634 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
638 s->functions = no_funcs;
640 for (i = 0; i < no_funcs; i++)
641 pcmcia_device_add(s, i);
647 static int pcmcia_requery_callback(struct device *dev, void * _data)
649 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
650 if (!p_dev->dev.driver) {
651 dev_dbg(dev, "update device information\n");
652 pcmcia_device_query(p_dev);
659 static void pcmcia_requery(struct pcmcia_socket *s)
663 if (s->functions == 0) {
668 /* some device information might have changed because of a CIS
669 * update or because we can finally read it correctly... so
670 * determine it again, overwriting old values if necessary. */
671 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
673 /* if the CIS changed, we need to check whether the number of
674 * functions changed. */
676 int old_funcs, new_funcs;
677 cistpl_longlink_mfc_t mfc;
679 /* does this cis override add or remove functions? */
680 old_funcs = s->functions;
682 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
687 if (old_funcs != new_funcs) {
688 /* we need to re-start */
689 pcmcia_card_remove(s, NULL);
694 /* If the PCMCIA device consists of two pseudo devices,
695 * call pcmcia_device_add() -- which will fail if both
696 * devices are already registered. */
697 mutex_lock(&s->ops_mutex);
698 has_pfc = s->pcmcia_state.has_pfc;
699 mutex_unlock(&s->ops_mutex);
701 pcmcia_device_add(s, 0);
703 /* we re-scan all devices, not just the ones connected to this
704 * socket. This does not matter, though. */
705 if (bus_rescan_devices(&pcmcia_bus_type))
706 dev_warn(&s->dev, "rescanning the bus failed\n");
710 #ifdef CONFIG_PCMCIA_LOAD_CIS
713 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
714 * @dev: the pcmcia device which needs a CIS override
715 * @filename: requested filename in /lib/firmware/
717 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
718 * the one provided by the card is broken. The firmware files reside in
719 * /lib/firmware/ in userspace.
721 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
723 struct pcmcia_socket *s = dev->socket;
724 const struct firmware *fw;
726 cistpl_longlink_mfc_t mfc;
727 int old_funcs, new_funcs = 1;
732 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
734 if (request_firmware(&fw, filename, &dev->dev) == 0) {
735 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
737 dev_printk(KERN_ERR, &dev->dev,
738 "pcmcia: CIS override is too big\n");
742 if (!pcmcia_replace_cis(s, fw->data, fw->size))
745 dev_printk(KERN_ERR, &dev->dev,
746 "pcmcia: CIS override failed\n");
750 /* we need to re-start if the number of functions changed */
751 old_funcs = s->functions;
752 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
756 if (old_funcs != new_funcs)
759 /* update information */
760 pcmcia_device_query(dev);
762 /* requery (as number of functions might have changed) */
763 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
766 release_firmware(fw);
771 #else /* !CONFIG_PCMCIA_LOAD_CIS */
773 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
781 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
782 struct pcmcia_device_id *did)
784 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
785 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
790 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
795 if (dev->func != did->function)
799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
800 if (!dev->prod_id[0])
802 if (strcmp(did->prod_id[0], dev->prod_id[0]))
806 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
807 if (!dev->prod_id[1])
809 if (strcmp(did->prod_id[1], dev->prod_id[1]))
813 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
814 if (!dev->prod_id[2])
816 if (strcmp(did->prod_id[2], dev->prod_id[2]))
820 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
821 if (!dev->prod_id[3])
823 if (strcmp(did->prod_id[3], dev->prod_id[3]))
827 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
828 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
829 mutex_lock(&dev->socket->ops_mutex);
830 dev->socket->pcmcia_state.has_pfc = 1;
831 mutex_unlock(&dev->socket->ops_mutex);
832 if (dev->device_no != did->device_no)
836 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
839 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
842 /* if this is a pseudo-multi-function device,
843 * we need explicit matches */
844 if (dev->socket->pcmcia_state.has_pfc)
849 /* also, FUNC_ID matching needs to be activated by userspace
850 * after it has re-checked that there is no possible module
851 * with a prod_id/manf_id/card_id match.
853 mutex_lock(&dev->socket->ops_mutex);
854 ret = dev->allow_func_id_match;
855 mutex_unlock(&dev->socket->ops_mutex);
859 "skipping FUNC_ID match until userspace ACK\n");
864 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
865 dev_dbg(&dev->dev, "device needs a fake CIS\n");
866 if (!dev->socket->fake_cis)
867 if (pcmcia_load_firmware(dev, did->cisfile))
871 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
873 for (i = 0; i < 4; i++)
876 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
884 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
886 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
887 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
888 struct pcmcia_device_id *did = p_drv->id_table;
889 struct pcmcia_dynid *dynid;
891 /* match dynamic devices first */
892 mutex_lock(&p_drv->dynids.lock);
893 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
894 dev_dbg(dev, "trying to match to %s\n", drv->name);
895 if (pcmcia_devmatch(p_dev, &dynid->id)) {
896 dev_dbg(dev, "matched to %s\n", drv->name);
897 mutex_unlock(&p_drv->dynids.lock);
901 mutex_unlock(&p_drv->dynids.lock);
903 #ifdef CONFIG_PCMCIA_IOCTL
904 /* matching by cardmgr */
905 if (p_dev->cardmgr == p_drv) {
906 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
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);
923 #ifdef CONFIG_HOTPLUG
925 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
927 struct pcmcia_device *p_dev;
929 u32 hash[4] = { 0, 0, 0, 0};
934 p_dev = to_pcmcia_dev(dev);
936 /* calculate hashes */
937 for (i = 0; i < 4; i++) {
938 if (!p_dev->prod_id[i])
940 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
943 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
946 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
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,
967 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
974 /************************ runtime PM support ***************************/
976 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
977 static int pcmcia_dev_resume(struct device *dev);
979 static int runtime_suspend(struct device *dev)
984 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
989 static int runtime_resume(struct device *dev)
994 rc = pcmcia_dev_resume(dev);
999 /************************ per-device sysfs output ***************************/
1001 #define pcmcia_device_attr(field, test, format) \
1002 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1004 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1005 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1008 #define pcmcia_device_stringattr(name, field) \
1009 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1011 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1012 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1015 pcmcia_device_attr(func, socket, "0x%02x\n");
1016 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1017 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1018 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1019 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1020 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1021 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1022 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1025 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1027 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029 if (p_dev->suspended)
1030 return sprintf(buf, "off\n");
1032 return sprintf(buf, "on\n");
1035 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1036 const char *buf, size_t count)
1038 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1044 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1045 ret = runtime_suspend(dev);
1046 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1047 ret = runtime_resume(dev);
1049 return ret ? ret : count;
1053 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1057 u32 hash[4] = { 0, 0, 0, 0};
1059 /* calculate hashes */
1060 for (i = 0; i < 4; i++) {
1061 if (!p_dev->prod_id[i])
1063 hash[i] = crc32(0, p_dev->prod_id[i],
1064 strlen(p_dev->prod_id[i]));
1066 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1067 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1068 p_dev->has_manf_id ? p_dev->manf_id : 0,
1069 p_dev->has_card_id ? p_dev->card_id : 0,
1070 p_dev->has_func_id ? p_dev->func_id : 0,
1071 p_dev->func, p_dev->device_no,
1072 hash[0], hash[1], hash[2], hash[3]);
1075 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1076 struct device_attribute *attr, const char *buf, size_t count)
1078 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1083 mutex_lock(&p_dev->socket->ops_mutex);
1084 p_dev->allow_func_id_match = 1;
1085 mutex_unlock(&p_dev->socket->ops_mutex);
1086 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1091 static struct device_attribute pcmcia_dev_attrs[] = {
1092 __ATTR(function, 0444, func_show, NULL),
1093 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1097 __ATTR_RO(prod_id1),
1098 __ATTR_RO(prod_id2),
1099 __ATTR_RO(prod_id3),
1100 __ATTR_RO(prod_id4),
1101 __ATTR_RO(modalias),
1102 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1106 /* PM support, also needed for reset */
1108 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1110 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1111 struct pcmcia_driver *p_drv = NULL;
1114 mutex_lock(&p_dev->socket->ops_mutex);
1115 if (p_dev->suspended) {
1116 mutex_unlock(&p_dev->socket->ops_mutex);
1119 p_dev->suspended = 1;
1120 mutex_unlock(&p_dev->socket->ops_mutex);
1122 dev_dbg(dev, "suspending\n");
1125 p_drv = to_pcmcia_drv(dev->driver);
1130 if (p_drv->suspend) {
1131 ret = p_drv->suspend(p_dev);
1133 dev_printk(KERN_ERR, dev,
1134 "pcmcia: device %s (driver %s) did "
1135 "not want to go to sleep (%d)\n",
1136 p_dev->devname, p_drv->drv.name, ret);
1137 mutex_lock(&p_dev->socket->ops_mutex);
1138 p_dev->suspended = 0;
1139 mutex_unlock(&p_dev->socket->ops_mutex);
1144 if (p_dev->device_no == p_dev->func) {
1145 dev_dbg(dev, "releasing configuration\n");
1146 pcmcia_release_configuration(p_dev);
1154 static int pcmcia_dev_resume(struct device *dev)
1156 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1157 struct pcmcia_driver *p_drv = NULL;
1160 mutex_lock(&p_dev->socket->ops_mutex);
1161 if (!p_dev->suspended) {
1162 mutex_unlock(&p_dev->socket->ops_mutex);
1165 p_dev->suspended = 0;
1166 mutex_unlock(&p_dev->socket->ops_mutex);
1168 dev_dbg(dev, "resuming\n");
1171 p_drv = to_pcmcia_drv(dev->driver);
1176 if (p_dev->device_no == p_dev->func) {
1177 dev_dbg(dev, "requesting configuration\n");
1178 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1184 ret = p_drv->resume(p_dev);
1191 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1193 struct pcmcia_socket *skt = _data;
1194 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1196 if (p_dev->socket != skt || p_dev->suspended)
1199 return runtime_suspend(dev);
1202 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1204 struct pcmcia_socket *skt = _data;
1205 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1207 if (p_dev->socket != skt || !p_dev->suspended)
1210 runtime_resume(dev);
1215 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1217 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1218 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1222 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1224 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1225 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1226 pcmcia_bus_suspend_callback)) {
1227 pcmcia_bus_resume(skt);
1234 /*======================================================================
1236 The card status event handler.
1238 ======================================================================*/
1240 /* Normally, the event is passed to individual drivers after
1241 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1242 * is inversed to maintain historic compatibility.
1245 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1247 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1250 dev_printk(KERN_ERR, &skt->dev,
1251 "PCMCIA obtaining reference to socket " \
1252 "failed, event 0x%x lost!\n", event);
1256 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1257 event, priority, skt);
1260 case CS_EVENT_CARD_REMOVAL:
1261 atomic_set(&skt->present, 0);
1262 pcmcia_card_remove(skt, NULL);
1263 handle_event(skt, event);
1264 mutex_lock(&s->ops_mutex);
1265 destroy_cis_cache(s);
1266 pcmcia_cleanup_irq(s);
1267 mutex_unlock(&s->ops_mutex);
1270 case CS_EVENT_CARD_INSERTION:
1271 atomic_set(&skt->present, 1);
1272 mutex_lock(&s->ops_mutex);
1273 s->pcmcia_state.has_pfc = 0;
1274 destroy_cis_cache(s); /* to be on the safe side... */
1275 mutex_unlock(&s->ops_mutex);
1276 pcmcia_card_add(skt);
1277 handle_event(skt, event);
1280 case CS_EVENT_EJECTION_REQUEST:
1283 case CS_EVENT_PM_RESUME:
1284 if (verify_cis_cache(skt) != 0) {
1285 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1286 /* first, remove the card */
1287 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1288 mutex_lock(&s->ops_mutex);
1289 destroy_cis_cache(skt);
1290 kfree(skt->fake_cis);
1291 skt->fake_cis = NULL;
1293 mutex_unlock(&s->ops_mutex);
1294 /* now, add the new card */
1295 ds_event(skt, CS_EVENT_CARD_INSERTION,
1298 handle_event(skt, event);
1301 case CS_EVENT_PM_SUSPEND:
1302 case CS_EVENT_RESET_PHYSICAL:
1303 case CS_EVENT_CARD_RESET:
1305 handle_event(skt, event);
1309 pcmcia_put_socket(s);
1315 * NOTE: This is racy. There's no guarantee the card will still be
1316 * physically present, even if the call to this function returns
1317 * non-NULL. Furthermore, the device driver most likely is unbound
1318 * almost immediately, so the timeframe where pcmcia_dev_present
1319 * returns NULL is probably really really small.
1321 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1323 struct pcmcia_device *p_dev;
1324 struct pcmcia_device *ret = NULL;
1326 p_dev = pcmcia_get_dev(_p_dev);
1330 if (atomic_read(&p_dev->socket->present) != 0)
1333 pcmcia_put_dev(p_dev);
1336 EXPORT_SYMBOL(pcmcia_dev_present);
1339 static struct pcmcia_callback pcmcia_bus_callback = {
1340 .owner = THIS_MODULE,
1342 .requery = pcmcia_requery,
1343 .validate = pccard_validate_cis,
1344 .suspend = pcmcia_bus_suspend,
1345 .resume = pcmcia_bus_resume,
1348 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1349 struct class_interface *class_intf)
1351 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1354 socket = pcmcia_get_socket(socket);
1356 dev_printk(KERN_ERR, dev,
1357 "PCMCIA obtaining reference to socket failed\n");
1361 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1363 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1364 pcmcia_put_socket(socket);
1368 #ifdef CONFIG_PCMCIA_IOCTL
1369 init_waitqueue_head(&socket->queue);
1371 INIT_LIST_HEAD(&socket->devices_list);
1372 memset(&socket->pcmcia_state, 0, sizeof(u8));
1373 socket->device_count = 0;
1375 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1377 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1378 pcmcia_put_socket(socket);
1382 atomic_set(&socket->present, 0);
1387 static void pcmcia_bus_remove_socket(struct device *dev,
1388 struct class_interface *class_intf)
1390 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1395 pccard_register_pcmcia(socket, NULL);
1397 /* unregister any unbound devices */
1398 mutex_lock(&socket->skt_mutex);
1399 pcmcia_card_remove(socket, NULL);
1400 release_cis_mem(socket);
1401 mutex_unlock(&socket->skt_mutex);
1403 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1405 pcmcia_put_socket(socket);
1411 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1412 static struct class_interface pcmcia_bus_interface __refdata = {
1413 .class = &pcmcia_socket_class,
1414 .add_dev = &pcmcia_bus_add_socket,
1415 .remove_dev = &pcmcia_bus_remove_socket,
1419 struct bus_type pcmcia_bus_type = {
1421 .uevent = pcmcia_bus_uevent,
1422 .match = pcmcia_bus_match,
1423 .dev_attrs = pcmcia_dev_attrs,
1424 .probe = pcmcia_device_probe,
1425 .remove = pcmcia_device_remove,
1426 .suspend = pcmcia_dev_suspend,
1427 .resume = pcmcia_dev_resume,
1431 static int __init init_pcmcia_bus(void)
1435 ret = bus_register(&pcmcia_bus_type);
1437 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1440 ret = class_interface_register(&pcmcia_bus_interface);
1443 "pcmcia: class_interface_register error: %d\n", ret);
1444 bus_unregister(&pcmcia_bus_type);
1448 pcmcia_setup_ioctl();
1452 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1453 * pcmcia_socket_class is already registered */
1456 static void __exit exit_pcmcia_bus(void)
1458 pcmcia_cleanup_ioctl();
1460 class_interface_unregister(&pcmcia_bus_interface);
1462 bus_unregister(&pcmcia_bus_type);
1464 module_exit(exit_pcmcia_bus);