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 spin_lock(&pdrv->dynids.lock);
128 list_add_tail(&dynid->node, &pdrv->dynids.list);
129 spin_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 spin_lock(&drv->dynids.lock);
148 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
149 list_del(&dynid->node);
152 spin_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 spin_lock_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);
240 dev_dbg(dev, "releasing device\n");
241 pcmcia_put_socket(p_dev->socket);
242 kfree(p_dev->devname);
243 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
247 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
249 if (!s->pcmcia_state.device_add_pending) {
250 dev_dbg(&s->dev, "scheduling to add %s secondary"
251 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
252 s->pcmcia_state.device_add_pending = 1;
253 s->pcmcia_state.mfc_pfc = mfc;
254 schedule_work(&s->device_add);
259 static int pcmcia_device_probe(struct device *dev)
261 struct pcmcia_device *p_dev;
262 struct pcmcia_driver *p_drv;
263 struct pcmcia_device_id *did;
264 struct pcmcia_socket *s;
265 cistpl_config_t cis_config;
268 dev = get_device(dev);
272 p_dev = to_pcmcia_dev(dev);
273 p_drv = to_pcmcia_drv(dev->driver);
276 /* The PCMCIA code passes the match data in via dev_set_drvdata(dev)
277 * which is an ugly hack. Once the driver probe is called it may
278 * and often will overwrite the match data so we must save it first
280 * handle pseudo multifunction devices:
281 * there are at most two pseudo multifunction devices.
282 * if we're matching against the first, schedule a
283 * call which will then check whether there are two
284 * pseudo devices, and if not, add the second one.
286 did = dev_get_drvdata(&p_dev->dev);
288 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
290 if ((!p_drv->probe) || (!p_dev->function_config) ||
291 (!try_module_get(p_drv->owner))) {
296 /* set up some more device information */
297 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
300 p_dev->conf.ConfigBase = cis_config.base;
301 p_dev->conf.Present = cis_config.rmask[0];
303 dev_printk(KERN_INFO, dev,
304 "pcmcia: could not parse base and rmask0 of CIS\n");
305 p_dev->conf.ConfigBase = 0;
306 p_dev->conf.Present = 0;
309 ret = p_drv->probe(p_dev);
311 dev_dbg(dev, "binding to %s failed with %d\n",
312 p_drv->drv.name, ret);
316 mutex_lock(&s->ops_mutex);
317 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
318 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
319 pcmcia_add_device_later(p_dev->socket, 0);
320 mutex_unlock(&s->ops_mutex);
324 module_put(p_drv->owner);
333 * Removes a PCMCIA card from the device tree and socket list.
335 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
337 struct pcmcia_device *p_dev;
338 struct pcmcia_device *tmp;
340 dev_dbg(leftover ? &leftover->dev : &s->dev,
341 "pcmcia_card_remove(%d) %s\n", s->sock,
342 leftover ? leftover->devname : "");
344 mutex_lock(&s->ops_mutex);
349 mutex_unlock(&s->ops_mutex);
351 /* unregister all pcmcia_devices registered with this socket, except leftover */
352 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
353 if (p_dev == leftover)
356 mutex_lock(&s->ops_mutex);
357 list_del(&p_dev->socket_device_list);
359 mutex_unlock(&s->ops_mutex);
361 dev_dbg(&p_dev->dev, "unregistering device\n");
362 device_unregister(&p_dev->dev);
368 static int pcmcia_device_remove(struct device *dev)
370 struct pcmcia_device *p_dev;
371 struct pcmcia_driver *p_drv;
372 struct pcmcia_device_id *did;
375 p_dev = to_pcmcia_dev(dev);
376 p_drv = to_pcmcia_drv(dev->driver);
378 dev_dbg(dev, "removing device\n");
380 /* If we're removing the primary module driving a
381 * pseudo multi-function card, we need to unbind
384 did = dev_get_drvdata(&p_dev->dev);
385 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
386 (p_dev->socket->device_count > 0) &&
387 (p_dev->device_no == 0))
388 pcmcia_card_remove(p_dev->socket, p_dev);
390 /* detach the "instance" */
395 p_drv->remove(p_dev);
397 p_dev->dev_node = NULL;
399 /* check for proper unloading */
400 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
401 dev_printk(KERN_INFO, dev,
402 "pcmcia: driver %s did not release config properly\n",
405 for (i = 0; i < MAX_WIN; i++)
406 if (p_dev->_win & CLIENT_WIN_REQ(i))
407 dev_printk(KERN_INFO, dev,
408 "pcmcia: driver %s did not release window properly\n",
411 /* references from pcmcia_probe_device */
412 pcmcia_put_dev(p_dev);
413 module_put(p_drv->owner);
420 * pcmcia_device_query -- determine information about a pcmcia device
422 static int pcmcia_device_query(struct pcmcia_device *p_dev)
424 cistpl_manfid_t manf_id;
425 cistpl_funcid_t func_id;
426 cistpl_vers_1_t *vers1;
429 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
433 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
434 CISTPL_MANFID, &manf_id)) {
435 p_dev->manf_id = manf_id.manf;
436 p_dev->card_id = manf_id.card;
437 p_dev->has_manf_id = 1;
438 p_dev->has_card_id = 1;
441 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
442 CISTPL_FUNCID, &func_id)) {
443 p_dev->func_id = func_id.func;
444 p_dev->has_func_id = 1;
446 /* rule of thumb: cards with no FUNCID, but with
447 * common memory device geometry information, are
448 * probably memory cards (from pcmcia-cs) */
449 cistpl_device_geo_t *devgeo;
451 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
456 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
457 CISTPL_DEVICE_GEO, devgeo)) {
459 "mem device geometry probably means "
461 p_dev->func_id = CISTPL_FUNCID_MEMORY;
462 p_dev->has_func_id = 1;
467 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
469 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
473 tmp = vers1->str + vers1->ofs[i];
475 length = strlen(tmp) + 1;
476 if ((length < 2) || (length > 255))
479 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
481 if (!p_dev->prod_id[i])
484 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
494 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
495 * Serializes pcmcia_device_add; will most likely be removed in future.
497 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
498 * won't work, this doesn't matter much at the moment: the driver core doesn't
501 static DEFINE_MUTEX(device_add_lock);
503 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
505 struct pcmcia_device *p_dev, *tmp_dev;
507 s = pcmcia_get_socket(s);
511 mutex_lock(&device_add_lock);
513 pr_debug("adding device to %d, function %d\n", s->sock, function);
515 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
519 mutex_lock(&s->ops_mutex);
520 p_dev->device_no = (s->device_count++);
521 mutex_unlock(&s->ops_mutex);
523 /* max of 4 devices per card */
524 if (p_dev->device_no >= 4)
528 p_dev->func = function;
530 p_dev->dev.bus = &pcmcia_bus_type;
531 p_dev->dev.parent = s->dev.parent;
532 p_dev->dev.release = pcmcia_release_dev;
533 /* by default don't allow DMA */
534 p_dev->dma_mask = DMA_MASK_NONE;
535 p_dev->dev.dma_mask = &p_dev->dma_mask;
536 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
537 if (!dev_name(&p_dev->dev))
539 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
542 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
544 mutex_lock(&s->ops_mutex);
547 * p_dev->function_config must be the same for all card functions.
548 * Note that this is serialized by the device_add_lock, so that
549 * only one such struct will be created.
551 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
552 if (p_dev->func == tmp_dev->func) {
553 p_dev->function_config = tmp_dev->function_config;
554 p_dev->io = tmp_dev->io;
555 p_dev->irq = tmp_dev->irq;
556 kref_get(&p_dev->function_config->ref);
559 /* Add to the list in pcmcia_bus_socket */
560 list_add(&p_dev->socket_device_list, &s->devices_list);
562 mutex_unlock(&s->ops_mutex);
564 if (!p_dev->function_config) {
565 dev_dbg(&p_dev->dev, "creating config_t\n");
566 p_dev->function_config = kzalloc(sizeof(struct config_t),
568 if (!p_dev->function_config)
570 kref_init(&p_dev->function_config->ref);
573 dev_printk(KERN_NOTICE, &p_dev->dev,
574 "pcmcia: registering new device %s\n",
577 pcmcia_device_query(p_dev);
579 if (device_register(&p_dev->dev))
582 mutex_unlock(&device_add_lock);
587 mutex_lock(&s->ops_mutex);
588 list_del(&p_dev->socket_device_list);
589 mutex_unlock(&s->ops_mutex);
592 mutex_lock(&s->ops_mutex);
594 mutex_unlock(&s->ops_mutex);
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 if (!(s->resource_setup_done)) {
614 "no resources available, delaying card_add\n");
615 return -EAGAIN; /* try again, but later... */
618 if (pcmcia_validate_mem(s)) {
619 dev_dbg(&s->dev, "validating mem resources failed, "
620 "delaying card_add\n");
621 return -EAGAIN; /* try again, but later... */
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 void pcmcia_delayed_add_device(struct work_struct *work)
645 struct pcmcia_socket *s =
646 container_of(work, struct pcmcia_socket, device_add);
649 mutex_lock(&s->ops_mutex);
650 mfc_pfc = s->pcmcia_state.mfc_pfc;
651 s->pcmcia_state.device_add_pending = 0;
652 s->pcmcia_state.mfc_pfc = 0;
653 mutex_unlock(&s->ops_mutex);
655 dev_dbg(&s->dev, "adding additional device to %d\n", s->sock);
656 pcmcia_device_add(s, mfc_pfc);
659 static int pcmcia_requery(struct device *dev, void * _data)
661 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
662 if (!p_dev->dev.driver) {
663 dev_dbg(dev, "update device information\n");
664 pcmcia_device_query(p_dev);
670 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
675 /* must be called with skt_mutex held */
676 dev_dbg(&skt->dev, "re-scanning socket %d\n", skt->sock);
678 mutex_lock(&skt->ops_mutex);
679 if (list_empty(&skt->devices_list))
681 mutex_unlock(&skt->ops_mutex);
683 /* If this is because of a CIS override, start over */
684 if (new_cis && !no_devices)
685 pcmcia_card_remove(skt, NULL);
687 /* if no devices were added for this socket yet because of
688 * missing resource information or other trouble, we need to
690 if (no_devices || new_cis) {
691 ret = pcmcia_card_add(skt);
696 /* some device information might have changed because of a CIS
697 * update or because we can finally read it correctly... so
698 * determine it again, overwriting old values if necessary. */
699 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
701 /* we re-scan all devices, not just the ones connected to this
702 * socket. This does not matter, though. */
703 ret = bus_rescan_devices(&pcmcia_bus_type);
705 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
708 #ifdef CONFIG_PCMCIA_LOAD_CIS
711 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
712 * @dev: the pcmcia device which needs a CIS override
713 * @filename: requested filename in /lib/firmware/
715 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
716 * the one provided by the card is broken. The firmware files reside in
717 * /lib/firmware/ in userspace.
719 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
721 struct pcmcia_socket *s = dev->socket;
722 const struct firmware *fw;
726 cistpl_longlink_mfc_t mfc;
731 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
733 if (request_firmware(&fw, filename, &dev->dev) == 0) {
734 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
736 dev_printk(KERN_ERR, &dev->dev,
737 "pcmcia: CIS override is too big\n");
741 if (!pcmcia_replace_cis(s, fw->data, fw->size))
744 dev_printk(KERN_ERR, &dev->dev,
745 "pcmcia: CIS override failed\n");
750 /* update information */
751 pcmcia_device_query(dev);
753 /* does this cis override add or remove functions? */
754 old_funcs = s->functions;
756 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
760 s->functions = no_funcs;
762 if (old_funcs > no_funcs)
763 pcmcia_card_remove(s, dev);
764 else if (no_funcs > old_funcs) {
765 mutex_lock(&s->ops_mutex);
766 pcmcia_add_device_later(s, 1);
767 mutex_unlock(&s->ops_mutex);
771 release_firmware(fw);
776 #else /* !CONFIG_PCMCIA_LOAD_CIS */
778 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
786 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
787 struct pcmcia_device_id *did)
789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
790 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
795 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
800 if (dev->func != did->function)
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
805 if (!dev->prod_id[0])
807 if (strcmp(did->prod_id[0], dev->prod_id[0]))
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
812 if (!dev->prod_id[1])
814 if (strcmp(did->prod_id[1], dev->prod_id[1]))
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
819 if (!dev->prod_id[2])
821 if (strcmp(did->prod_id[2], dev->prod_id[2]))
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
826 if (!dev->prod_id[3])
828 if (strcmp(did->prod_id[3], dev->prod_id[3]))
832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
833 if (dev->device_no != did->device_no)
837 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
838 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
841 /* if this is a pseudo-multi-function device,
842 * we need explicit matches */
843 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
848 /* also, FUNC_ID matching needs to be activated by userspace
849 * after it has re-checked that there is no possible module
850 * with a prod_id/manf_id/card_id match.
853 "skipping FUNC_ID match until userspace interaction\n");
854 if (!dev->allow_func_id_match)
858 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
859 dev_dbg(&dev->dev, "device needs a fake CIS\n");
860 if (!dev->socket->fake_cis)
861 pcmcia_load_firmware(dev, did->cisfile);
863 if (!dev->socket->fake_cis)
867 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
869 for (i = 0; i < 4; i++)
872 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
876 dev_set_drvdata(&dev->dev, did);
882 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
884 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
885 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
886 struct pcmcia_device_id *did = p_drv->id_table;
887 struct pcmcia_dynid *dynid;
889 /* match dynamic devices first */
890 spin_lock(&p_drv->dynids.lock);
891 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
892 dev_dbg(dev, "trying to match to %s\n", drv->name);
893 if (pcmcia_devmatch(p_dev, &dynid->id)) {
894 dev_dbg(dev, "matched to %s\n", drv->name);
895 spin_unlock(&p_drv->dynids.lock);
899 spin_unlock(&p_drv->dynids.lock);
901 #ifdef CONFIG_PCMCIA_IOCTL
902 /* matching by cardmgr */
903 if (p_dev->cardmgr == p_drv) {
904 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
909 while (did && did->match_flags) {
910 dev_dbg(dev, "trying to match to %s\n", drv->name);
911 if (pcmcia_devmatch(p_dev, did)) {
912 dev_dbg(dev, "matched to %s\n", drv->name);
921 #ifdef CONFIG_HOTPLUG
923 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
925 struct pcmcia_device *p_dev;
927 u32 hash[4] = { 0, 0, 0, 0};
932 p_dev = to_pcmcia_dev(dev);
934 /* calculate hashes */
935 for (i = 0; i < 4; i++) {
936 if (!p_dev->prod_id[i])
938 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
941 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
944 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
947 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
948 "pa%08Xpb%08Xpc%08Xpd%08X",
949 p_dev->has_manf_id ? p_dev->manf_id : 0,
950 p_dev->has_card_id ? p_dev->card_id : 0,
951 p_dev->has_func_id ? p_dev->func_id : 0,
965 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
972 /************************ runtime PM support ***************************/
974 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
975 static int pcmcia_dev_resume(struct device *dev);
977 static int runtime_suspend(struct device *dev)
982 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
987 static int runtime_resume(struct device *dev)
992 rc = pcmcia_dev_resume(dev);
997 /************************ per-device sysfs output ***************************/
999 #define pcmcia_device_attr(field, test, format) \
1000 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1002 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1003 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1006 #define pcmcia_device_stringattr(name, field) \
1007 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1009 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1010 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1013 pcmcia_device_attr(func, socket, "0x%02x\n");
1014 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1015 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1016 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1017 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1018 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1019 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1020 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1023 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1025 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1027 if (p_dev->suspended)
1028 return sprintf(buf, "off\n");
1030 return sprintf(buf, "on\n");
1033 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1034 const char *buf, size_t count)
1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1042 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1043 ret = runtime_suspend(dev);
1044 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1045 ret = runtime_resume(dev);
1047 return ret ? ret : count;
1051 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1053 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1055 u32 hash[4] = { 0, 0, 0, 0};
1057 /* calculate hashes */
1058 for (i = 0; i < 4; i++) {
1059 if (!p_dev->prod_id[i])
1061 hash[i] = crc32(0, p_dev->prod_id[i],
1062 strlen(p_dev->prod_id[i]));
1064 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1065 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1066 p_dev->has_manf_id ? p_dev->manf_id : 0,
1067 p_dev->has_card_id ? p_dev->card_id : 0,
1068 p_dev->has_func_id ? p_dev->func_id : 0,
1069 p_dev->func, p_dev->device_no,
1070 hash[0], hash[1], hash[2], hash[3]);
1073 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1074 struct device_attribute *attr, const char *buf, size_t count)
1076 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1082 mutex_lock(&p_dev->socket->skt_mutex);
1083 p_dev->allow_func_id_match = 1;
1084 mutex_unlock(&p_dev->socket->skt_mutex);
1086 ret = bus_rescan_devices(&pcmcia_bus_type);
1088 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1089 "allowing func_id matches\n");
1094 static struct device_attribute pcmcia_dev_attrs[] = {
1095 __ATTR(function, 0444, func_show, NULL),
1096 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1100 __ATTR_RO(prod_id1),
1101 __ATTR_RO(prod_id2),
1102 __ATTR_RO(prod_id3),
1103 __ATTR_RO(prod_id4),
1104 __ATTR_RO(modalias),
1105 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1109 /* PM support, also needed for reset */
1111 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1113 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1114 struct pcmcia_driver *p_drv = NULL;
1117 if (p_dev->suspended)
1120 dev_dbg(dev, "suspending\n");
1123 p_drv = to_pcmcia_drv(dev->driver);
1128 if (p_drv->suspend) {
1129 ret = p_drv->suspend(p_dev);
1131 dev_printk(KERN_ERR, dev,
1132 "pcmcia: device %s (driver %s) did "
1133 "not want to go to sleep (%d)\n",
1134 p_dev->devname, p_drv->drv.name, ret);
1139 if (p_dev->device_no == p_dev->func) {
1140 dev_dbg(dev, "releasing configuration\n");
1141 pcmcia_release_configuration(p_dev);
1146 p_dev->suspended = 1;
1151 static int pcmcia_dev_resume(struct device *dev)
1153 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1154 struct pcmcia_driver *p_drv = NULL;
1157 if (!p_dev->suspended)
1160 dev_dbg(dev, "resuming\n");
1163 p_drv = to_pcmcia_drv(dev->driver);
1168 if (p_dev->device_no == p_dev->func) {
1169 dev_dbg(dev, "requesting configuration\n");
1170 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1176 ret = p_drv->resume(p_dev);
1180 p_dev->suspended = 0;
1185 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1187 struct pcmcia_socket *skt = _data;
1188 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1190 if (p_dev->socket != skt || p_dev->suspended)
1193 return runtime_suspend(dev);
1196 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1198 struct pcmcia_socket *skt = _data;
1199 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1201 if (p_dev->socket != skt || !p_dev->suspended)
1204 runtime_resume(dev);
1209 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1211 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1212 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1216 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1218 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1219 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1220 pcmcia_bus_suspend_callback)) {
1221 pcmcia_bus_resume(skt);
1228 /*======================================================================
1230 The card status event handler.
1232 ======================================================================*/
1234 /* Normally, the event is passed to individual drivers after
1235 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1236 * is inversed to maintain historic compatibility.
1239 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1241 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1244 dev_printk(KERN_ERR, &skt->dev,
1245 "PCMCIA obtaining reference to socket " \
1246 "failed, event 0x%x lost!\n", event);
1250 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1251 event, priority, skt);
1254 case CS_EVENT_CARD_REMOVAL:
1255 mutex_lock(&s->ops_mutex);
1256 s->pcmcia_state.present = 0;
1257 mutex_unlock(&s->ops_mutex);
1258 pcmcia_card_remove(skt, NULL);
1259 handle_event(skt, event);
1260 mutex_lock(&s->ops_mutex);
1261 destroy_cis_cache(s);
1262 mutex_unlock(&s->ops_mutex);
1265 case CS_EVENT_CARD_INSERTION:
1266 mutex_lock(&s->ops_mutex);
1267 s->pcmcia_state.present = 1;
1268 destroy_cis_cache(s); /* to be on the safe side... */
1269 mutex_unlock(&s->ops_mutex);
1270 pcmcia_card_add(skt);
1271 handle_event(skt, event);
1274 case CS_EVENT_EJECTION_REQUEST:
1277 case CS_EVENT_PM_RESUME:
1278 if (verify_cis_cache(skt) != 0) {
1279 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1280 /* first, remove the card */
1281 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1282 mutex_lock(&s->ops_mutex);
1283 destroy_cis_cache(skt);
1284 kfree(skt->fake_cis);
1285 skt->fake_cis = NULL;
1286 mutex_unlock(&s->ops_mutex);
1287 /* now, add the new card */
1288 ds_event(skt, CS_EVENT_CARD_INSERTION,
1291 handle_event(skt, event);
1294 case CS_EVENT_PM_SUSPEND:
1295 case CS_EVENT_RESET_PHYSICAL:
1296 case CS_EVENT_CARD_RESET:
1298 handle_event(skt, event);
1302 pcmcia_put_socket(s);
1308 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1310 struct pcmcia_device *p_dev;
1311 struct pcmcia_device *ret = NULL;
1313 p_dev = pcmcia_get_dev(_p_dev);
1317 mutex_lock(&p_dev->socket->ops_mutex);
1318 if (!p_dev->socket->pcmcia_state.present)
1321 if (p_dev->socket->pcmcia_state.dead)
1324 if (p_dev->_removed)
1327 if (p_dev->suspended)
1332 mutex_unlock(&p_dev->socket->ops_mutex);
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_bus_rescan,
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");
1362 * Ugly. But we want to wait for the socket threads to have started up.
1363 * We really should let the drivers themselves drive some of this..
1367 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1369 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1370 pcmcia_put_socket(socket);
1374 #ifdef CONFIG_PCMCIA_IOCTL
1375 init_waitqueue_head(&socket->queue);
1377 INIT_LIST_HEAD(&socket->devices_list);
1378 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1379 memset(&socket->pcmcia_state, 0, sizeof(u8));
1380 socket->device_count = 0;
1382 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1384 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1385 pcmcia_put_socket(socket);
1392 static void pcmcia_bus_remove_socket(struct device *dev,
1393 struct class_interface *class_intf)
1395 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1400 mutex_lock(&socket->ops_mutex);
1401 socket->pcmcia_state.dead = 1;
1402 mutex_unlock(&socket->ops_mutex);
1404 pccard_register_pcmcia(socket, NULL);
1406 /* unregister any unbound devices */
1407 mutex_lock(&socket->skt_mutex);
1408 pcmcia_card_remove(socket, NULL);
1409 release_cis_mem(socket);
1410 mutex_unlock(&socket->skt_mutex);
1412 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1414 pcmcia_put_socket(socket);
1420 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1421 static struct class_interface pcmcia_bus_interface __refdata = {
1422 .class = &pcmcia_socket_class,
1423 .add_dev = &pcmcia_bus_add_socket,
1424 .remove_dev = &pcmcia_bus_remove_socket,
1428 struct bus_type pcmcia_bus_type = {
1430 .uevent = pcmcia_bus_uevent,
1431 .match = pcmcia_bus_match,
1432 .dev_attrs = pcmcia_dev_attrs,
1433 .probe = pcmcia_device_probe,
1434 .remove = pcmcia_device_remove,
1435 .suspend = pcmcia_dev_suspend,
1436 .resume = pcmcia_dev_resume,
1440 static int __init init_pcmcia_bus(void)
1444 ret = bus_register(&pcmcia_bus_type);
1446 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1449 ret = class_interface_register(&pcmcia_bus_interface);
1452 "pcmcia: class_interface_register error: %d\n", ret);
1453 bus_unregister(&pcmcia_bus_type);
1457 pcmcia_setup_ioctl();
1461 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1462 * pcmcia_socket_class is already registered */
1465 static void __exit exit_pcmcia_bus(void)
1467 pcmcia_cleanup_ioctl();
1469 class_interface_unregister(&pcmcia_bus_interface);
1471 bus_unregister(&pcmcia_bus_type);
1473 module_exit(exit_pcmcia_bus);