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>
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/cs.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/ds.h>
32 #include <pcmcia/ss.h>
34 #include "cs_internal.h"
36 /*====================================================================*/
38 /* Module parameters */
40 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
41 MODULE_DESCRIPTION("PCMCIA Driver Services");
42 MODULE_LICENSE("GPL");
45 /*====================================================================*/
47 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
49 struct pcmcia_device_id *did = p_drv->id_table;
53 if (!p_drv->probe || !p_drv->remove)
54 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
55 "function\n", p_drv->drv.name);
57 while (did && did->match_flags) {
58 for (i = 0; i < 4; i++) {
62 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
63 if (hash == did->prod_id_hash[i])
66 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
67 "product string \"%s\": is 0x%x, should "
68 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
69 did->prod_id_hash[i], hash);
70 printk(KERN_DEBUG "pcmcia: see "
71 "Documentation/pcmcia/devicetable.txt for "
81 /*======================================================================*/
85 struct list_head node;
86 struct pcmcia_device_id id;
90 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
91 * @driver: target device driver
92 * @buf: buffer for scanning device ID data
95 * Adds a new dynamic PCMCIA device ID to this driver,
96 * and causes the driver to probe for all devices again.
99 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
101 struct pcmcia_dynid *dynid;
102 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
103 __u16 match_flags, manf_id, card_id;
104 __u8 func_id, function, device_no;
105 __u32 prod_id_hash[4] = {0, 0, 0, 0};
109 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
110 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
111 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
115 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
119 dynid->id.match_flags = match_flags;
120 dynid->id.manf_id = manf_id;
121 dynid->id.card_id = card_id;
122 dynid->id.func_id = func_id;
123 dynid->id.function = function;
124 dynid->id.device_no = device_no;
125 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
127 mutex_lock(&pdrv->dynids.lock);
128 list_add_tail(&dynid->node, &pdrv->dynids.list);
129 mutex_unlock(&pdrv->dynids.lock);
131 if (get_driver(&pdrv->drv)) {
132 retval = driver_attach(&pdrv->drv);
133 put_driver(&pdrv->drv);
140 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
143 pcmcia_free_dynids(struct pcmcia_driver *drv)
145 struct pcmcia_dynid *dynid, *n;
147 mutex_lock(&drv->dynids.lock);
148 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
149 list_del(&dynid->node);
152 mutex_unlock(&drv->dynids.lock);
156 pcmcia_create_newid_file(struct pcmcia_driver *drv)
159 if (drv->probe != NULL)
160 error = driver_create_file(&drv->drv, &driver_attr_new_id);
166 * pcmcia_register_driver - register a PCMCIA driver with the bus core
167 * @driver: the &driver being registered
169 * Registers a PCMCIA driver with the PCMCIA bus core.
171 int pcmcia_register_driver(struct pcmcia_driver *driver)
178 pcmcia_check_driver(driver);
180 /* initialize common fields */
181 driver->drv.bus = &pcmcia_bus_type;
182 driver->drv.owner = driver->owner;
183 mutex_init(&driver->dynids.lock);
184 INIT_LIST_HEAD(&driver->dynids.list);
186 pr_debug("registering driver %s\n", driver->drv.name);
188 error = driver_register(&driver->drv);
192 error = pcmcia_create_newid_file(driver);
194 driver_unregister(&driver->drv);
198 EXPORT_SYMBOL(pcmcia_register_driver);
201 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
202 * @driver: the &driver being unregistered
204 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
206 pr_debug("unregistering driver %s\n", driver->drv.name);
207 driver_unregister(&driver->drv);
208 pcmcia_free_dynids(driver);
210 EXPORT_SYMBOL(pcmcia_unregister_driver);
213 /* pcmcia_device handling */
215 struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
217 struct device *tmp_dev;
218 tmp_dev = get_device(&p_dev->dev);
221 return to_pcmcia_dev(tmp_dev);
224 void pcmcia_put_dev(struct pcmcia_device *p_dev)
227 put_device(&p_dev->dev);
230 static void pcmcia_release_function(struct kref *ref)
232 struct config_t *c = container_of(ref, struct config_t, ref);
233 pr_debug("releasing config_t\n");
237 static void pcmcia_release_dev(struct device *dev)
239 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
241 dev_dbg(dev, "releasing device\n");
242 pcmcia_put_socket(p_dev->socket);
243 for (i = 0; i < 4; i++)
244 kfree(p_dev->prod_id[i]);
245 kfree(p_dev->devname);
246 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
251 static int pcmcia_device_probe(struct device *dev)
253 struct pcmcia_device *p_dev;
254 struct pcmcia_driver *p_drv;
255 struct pcmcia_socket *s;
256 cistpl_config_t cis_config;
259 dev = get_device(dev);
263 p_dev = to_pcmcia_dev(dev);
264 p_drv = to_pcmcia_drv(dev->driver);
267 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
269 if ((!p_drv->probe) || (!p_dev->function_config) ||
270 (!try_module_get(p_drv->owner))) {
275 /* set up some more device information */
276 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
279 p_dev->conf.ConfigBase = cis_config.base;
280 p_dev->conf.Present = cis_config.rmask[0];
282 dev_printk(KERN_INFO, dev,
283 "pcmcia: could not parse base and rmask0 of CIS\n");
284 p_dev->conf.ConfigBase = 0;
285 p_dev->conf.Present = 0;
288 ret = p_drv->probe(p_dev);
290 dev_dbg(dev, "binding to %s failed with %d\n",
291 p_drv->drv.name, ret);
295 mutex_lock(&s->ops_mutex);
296 if ((s->pcmcia_state.has_pfc) &&
297 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
298 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
299 mutex_unlock(&s->ops_mutex);
303 module_put(p_drv->owner);
312 * Removes a PCMCIA card from the device tree and socket list.
314 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
316 struct pcmcia_device *p_dev;
317 struct pcmcia_device *tmp;
319 dev_dbg(leftover ? &leftover->dev : &s->dev,
320 "pcmcia_card_remove(%d) %s\n", s->sock,
321 leftover ? leftover->devname : "");
323 mutex_lock(&s->ops_mutex);
328 mutex_unlock(&s->ops_mutex);
330 /* unregister all pcmcia_devices registered with this socket, except leftover */
331 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
332 if (p_dev == leftover)
335 mutex_lock(&s->ops_mutex);
336 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 mutex_unlock(&s->ops_mutex);
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),
561 if (!p_dev->function_config)
563 kref_init(&p_dev->function_config->ref);
566 dev_printk(KERN_NOTICE, &p_dev->dev,
567 "pcmcia: registering new device %s\n",
570 pcmcia_device_query(p_dev);
572 if (device_register(&p_dev->dev))
575 mutex_unlock(&device_add_lock);
580 mutex_lock(&s->ops_mutex);
581 list_del(&p_dev->socket_device_list);
582 mutex_unlock(&s->ops_mutex);
585 mutex_lock(&s->ops_mutex);
587 mutex_unlock(&s->ops_mutex);
589 for (i = 0; i < 4; i++)
590 kfree(p_dev->prod_id[i]);
591 kfree(p_dev->devname);
594 mutex_unlock(&device_add_lock);
595 pcmcia_put_socket(s);
601 static int pcmcia_card_add(struct pcmcia_socket *s)
603 cistpl_longlink_mfc_t mfc;
604 unsigned int no_funcs, i, no_chains;
607 mutex_lock(&s->ops_mutex);
608 if (!(s->resource_setup_done)) {
610 "no resources available, delaying card_add\n");
611 mutex_unlock(&s->ops_mutex);
612 return -EAGAIN; /* try again, but later... */
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... */
621 mutex_unlock(&s->ops_mutex);
623 ret = pccard_validate_cis(s, &no_chains);
624 if (ret || !no_chains) {
625 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
629 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
633 s->functions = no_funcs;
635 for (i = 0; i < no_funcs; i++)
636 pcmcia_device_add(s, i);
642 static int pcmcia_requery_callback(struct device *dev, void * _data)
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);
654 static void pcmcia_requery(struct pcmcia_socket *s)
656 int present, has_pfc;
658 mutex_lock(&s->ops_mutex);
659 present = s->pcmcia_state.present;
660 mutex_unlock(&s->ops_mutex);
665 if (s->functions == 0) {
670 /* some device information might have changed because of a CIS
671 * update or because we can finally read it correctly... so
672 * determine it again, overwriting old values if necessary. */
673 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
675 /* if the CIS changed, we need to check whether the number of
676 * functions changed. */
678 int old_funcs, new_funcs;
679 cistpl_longlink_mfc_t mfc;
681 /* does this cis override add or remove functions? */
682 old_funcs = s->functions;
684 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
689 if (old_funcs > new_funcs) {
690 pcmcia_card_remove(s, NULL);
692 } else if (new_funcs > old_funcs) {
693 s->functions = new_funcs;
694 pcmcia_device_add(s, 1);
698 /* If the PCMCIA device consists of two pseudo devices,
699 * call pcmcia_device_add() -- which will fail if both
700 * devices are already registered. */
701 mutex_lock(&s->ops_mutex);
702 has_pfc = s->pcmcia_state.has_pfc;
703 mutex_unlock(&s->ops_mutex);
705 pcmcia_device_add(s, 0);
707 /* we re-scan all devices, not just the ones connected to this
708 * socket. This does not matter, though. */
709 if (bus_rescan_devices(&pcmcia_bus_type))
710 dev_warn(&s->dev, "rescanning the bus failed\n");
714 #ifdef CONFIG_PCMCIA_LOAD_CIS
717 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
718 * @dev: the pcmcia device which needs a CIS override
719 * @filename: requested filename in /lib/firmware/
721 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
722 * the one provided by the card is broken. The firmware files reside in
723 * /lib/firmware/ in userspace.
725 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
727 struct pcmcia_socket *s = dev->socket;
728 const struct firmware *fw;
734 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
736 if (request_firmware(&fw, filename, &dev->dev) == 0) {
737 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
739 dev_printk(KERN_ERR, &dev->dev,
740 "pcmcia: CIS override is too big\n");
744 if (!pcmcia_replace_cis(s, fw->data, fw->size))
747 dev_printk(KERN_ERR, &dev->dev,
748 "pcmcia: CIS override failed\n");
753 /* update information */
754 pcmcia_device_query(dev);
756 /* requery (as number of functions might have changed) */
757 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
760 release_firmware(fw);
765 #else /* !CONFIG_PCMCIA_LOAD_CIS */
767 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
775 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
776 struct pcmcia_device_id *did)
778 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
779 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
783 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
784 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
788 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
789 if (dev->func != did->function)
793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
794 if (!dev->prod_id[0])
796 if (strcmp(did->prod_id[0], dev->prod_id[0]))
800 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
801 if (!dev->prod_id[1])
803 if (strcmp(did->prod_id[1], dev->prod_id[1]))
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
808 if (!dev->prod_id[2])
810 if (strcmp(did->prod_id[2], dev->prod_id[2]))
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
815 if (!dev->prod_id[3])
817 if (strcmp(did->prod_id[3], dev->prod_id[3]))
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
822 if (dev->device_no != did->device_no)
824 mutex_lock(&dev->socket->ops_mutex);
825 dev->socket->pcmcia_state.has_pfc = 1;
826 mutex_unlock(&dev->socket->ops_mutex);
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
832 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
835 /* if this is a pseudo-multi-function device,
836 * we need explicit matches */
837 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
842 /* also, FUNC_ID matching needs to be activated by userspace
843 * after it has re-checked that there is no possible module
844 * with a prod_id/manf_id/card_id match.
846 mutex_lock(&dev->socket->ops_mutex);
847 ret = dev->allow_func_id_match;
848 mutex_unlock(&dev->socket->ops_mutex);
852 "skipping FUNC_ID match until userspace ACK\n");
857 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
858 dev_dbg(&dev->dev, "device needs a fake CIS\n");
859 if (!dev->socket->fake_cis)
860 pcmcia_load_firmware(dev, did->cisfile);
862 if (!dev->socket->fake_cis)
866 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
868 for (i = 0; i < 4; i++)
871 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
879 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
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;
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);
896 mutex_unlock(&p_drv->dynids.lock);
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);
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);
918 #ifdef CONFIG_HOTPLUG
920 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
922 struct pcmcia_device *p_dev;
924 u32 hash[4] = { 0, 0, 0, 0};
929 p_dev = to_pcmcia_dev(dev);
931 /* calculate hashes */
932 for (i = 0; i < 4; i++) {
933 if (!p_dev->prod_id[i])
935 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
938 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
941 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
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,
962 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
969 /************************ runtime PM support ***************************/
971 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
972 static int pcmcia_dev_resume(struct device *dev);
974 static int runtime_suspend(struct device *dev)
979 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
984 static int runtime_resume(struct device *dev)
989 rc = pcmcia_dev_resume(dev);
994 /************************ per-device sysfs output ***************************/
996 #define pcmcia_device_attr(field, test, format) \
997 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
999 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1000 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1003 #define pcmcia_device_stringattr(name, field) \
1004 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1006 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1007 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1010 pcmcia_device_attr(func, socket, "0x%02x\n");
1011 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1012 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1013 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1014 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1015 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1016 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1017 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1020 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1022 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1024 if (p_dev->suspended)
1025 return sprintf(buf, "off\n");
1027 return sprintf(buf, "on\n");
1030 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1031 const char *buf, size_t count)
1033 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
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);
1044 return ret ? ret : count;
1048 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1050 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1052 u32 hash[4] = { 0, 0, 0, 0};
1054 /* calculate hashes */
1055 for (i = 0; i < 4; i++) {
1056 if (!p_dev->prod_id[i])
1058 hash[i] = crc32(0, p_dev->prod_id[i],
1059 strlen(p_dev->prod_id[i]));
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]);
1070 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1071 struct device_attribute *attr, const char *buf, size_t count)
1073 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
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);
1086 static 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),
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),
1101 /* PM support, also needed for reset */
1103 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1105 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1106 struct pcmcia_driver *p_drv = NULL;
1109 mutex_lock(&p_dev->socket->ops_mutex);
1110 if (p_dev->suspended) {
1111 mutex_unlock(&p_dev->socket->ops_mutex);
1114 p_dev->suspended = 1;
1115 mutex_unlock(&p_dev->socket->ops_mutex);
1117 dev_dbg(dev, "suspending\n");
1120 p_drv = to_pcmcia_drv(dev->driver);
1125 if (p_drv->suspend) {
1126 ret = p_drv->suspend(p_dev);
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);
1139 if (p_dev->device_no == p_dev->func) {
1140 dev_dbg(dev, "releasing configuration\n");
1141 pcmcia_release_configuration(p_dev);
1149 static int pcmcia_dev_resume(struct device *dev)
1151 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1152 struct pcmcia_driver *p_drv = NULL;
1155 mutex_lock(&p_dev->socket->ops_mutex);
1156 if (!p_dev->suspended) {
1157 mutex_unlock(&p_dev->socket->ops_mutex);
1160 p_dev->suspended = 0;
1161 mutex_unlock(&p_dev->socket->ops_mutex);
1163 dev_dbg(dev, "resuming\n");
1166 p_drv = to_pcmcia_drv(dev->driver);
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);
1179 ret = p_drv->resume(p_dev);
1186 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1188 struct pcmcia_socket *skt = _data;
1189 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1191 if (p_dev->socket != skt || p_dev->suspended)
1194 return runtime_suspend(dev);
1197 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1199 struct pcmcia_socket *skt = _data;
1200 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1202 if (p_dev->socket != skt || !p_dev->suspended)
1205 runtime_resume(dev);
1210 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
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);
1217 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
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);
1229 /*======================================================================
1231 The card status event handler.
1233 ======================================================================*/
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.
1240 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1242 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1245 dev_printk(KERN_ERR, &skt->dev,
1246 "PCMCIA obtaining reference to socket " \
1247 "failed, event 0x%x lost!\n", event);
1251 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1252 event, priority, skt);
1255 case CS_EVENT_CARD_REMOVAL:
1256 mutex_lock(&s->ops_mutex);
1257 s->pcmcia_state.present = 0;
1258 mutex_unlock(&s->ops_mutex);
1259 pcmcia_card_remove(skt, NULL);
1260 handle_event(skt, event);
1261 mutex_lock(&s->ops_mutex);
1262 destroy_cis_cache(s);
1263 mutex_unlock(&s->ops_mutex);
1266 case CS_EVENT_CARD_INSERTION:
1267 mutex_lock(&s->ops_mutex);
1268 s->pcmcia_state.has_pfc = 0;
1269 s->pcmcia_state.present = 1;
1270 destroy_cis_cache(s); /* to be on the safe side... */
1271 mutex_unlock(&s->ops_mutex);
1272 pcmcia_card_add(skt);
1273 handle_event(skt, event);
1276 case CS_EVENT_EJECTION_REQUEST:
1279 case CS_EVENT_PM_RESUME:
1280 if (verify_cis_cache(skt) != 0) {
1281 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1282 /* first, remove the card */
1283 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1284 mutex_lock(&s->ops_mutex);
1285 destroy_cis_cache(skt);
1286 kfree(skt->fake_cis);
1287 skt->fake_cis = NULL;
1288 mutex_unlock(&s->ops_mutex);
1289 /* now, add the new card */
1290 ds_event(skt, CS_EVENT_CARD_INSERTION,
1293 handle_event(skt, event);
1296 case CS_EVENT_PM_SUSPEND:
1297 case CS_EVENT_RESET_PHYSICAL:
1298 case CS_EVENT_CARD_RESET:
1300 handle_event(skt, event);
1304 pcmcia_put_socket(s);
1310 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1312 struct pcmcia_device *p_dev;
1313 struct pcmcia_device *ret = NULL;
1315 p_dev = pcmcia_get_dev(_p_dev);
1319 mutex_lock(&p_dev->socket->ops_mutex);
1320 if (!p_dev->socket->pcmcia_state.present)
1323 if (p_dev->socket->pcmcia_state.dead)
1326 if (p_dev->_removed)
1329 if (p_dev->suspended)
1334 mutex_unlock(&p_dev->socket->ops_mutex);
1335 pcmcia_put_dev(p_dev);
1338 EXPORT_SYMBOL(pcmcia_dev_present);
1341 static struct pcmcia_callback pcmcia_bus_callback = {
1342 .owner = THIS_MODULE,
1344 .requery = pcmcia_requery,
1345 .validate = pccard_validate_cis,
1346 .suspend = pcmcia_bus_suspend,
1347 .resume = pcmcia_bus_resume,
1350 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1351 struct class_interface *class_intf)
1353 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1356 socket = pcmcia_get_socket(socket);
1358 dev_printk(KERN_ERR, dev,
1359 "PCMCIA obtaining reference to socket failed\n");
1363 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1365 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1366 pcmcia_put_socket(socket);
1370 #ifdef CONFIG_PCMCIA_IOCTL
1371 init_waitqueue_head(&socket->queue);
1373 INIT_LIST_HEAD(&socket->devices_list);
1374 memset(&socket->pcmcia_state, 0, sizeof(u8));
1375 socket->device_count = 0;
1377 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1379 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1380 pcmcia_put_socket(socket);
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 mutex_lock(&socket->ops_mutex);
1396 socket->pcmcia_state.dead = 1;
1397 mutex_unlock(&socket->ops_mutex);
1399 pccard_register_pcmcia(socket, NULL);
1401 /* unregister any unbound devices */
1402 mutex_lock(&socket->skt_mutex);
1403 pcmcia_card_remove(socket, NULL);
1404 release_cis_mem(socket);
1405 mutex_unlock(&socket->skt_mutex);
1407 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1409 pcmcia_put_socket(socket);
1415 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1416 static struct class_interface pcmcia_bus_interface __refdata = {
1417 .class = &pcmcia_socket_class,
1418 .add_dev = &pcmcia_bus_add_socket,
1419 .remove_dev = &pcmcia_bus_remove_socket,
1423 struct bus_type pcmcia_bus_type = {
1425 .uevent = pcmcia_bus_uevent,
1426 .match = pcmcia_bus_match,
1427 .dev_attrs = pcmcia_dev_attrs,
1428 .probe = pcmcia_device_probe,
1429 .remove = pcmcia_device_remove,
1430 .suspend = pcmcia_dev_suspend,
1431 .resume = pcmcia_dev_resume,
1435 static int __init init_pcmcia_bus(void)
1439 ret = bus_register(&pcmcia_bus_type);
1441 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1444 ret = class_interface_register(&pcmcia_bus_interface);
1447 "pcmcia: class_interface_register error: %d\n", ret);
1448 bus_unregister(&pcmcia_bus_type);
1452 pcmcia_setup_ioctl();
1456 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1457 * pcmcia_socket_class is already registered */
1460 static void __exit exit_pcmcia_bus(void)
1462 pcmcia_cleanup_ioctl();
1464 class_interface_unregister(&pcmcia_bus_interface);
1466 bus_unregister(&pcmcia_bus_type);
1468 module_exit(exit_pcmcia_bus);