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 - 2010 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 static 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 static 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_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_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 /* check for proper unloading */
375 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
376 dev_printk(KERN_INFO, dev,
377 "pcmcia: driver %s did not release config properly\n",
380 for (i = 0; i < MAX_WIN; i++)
381 if (p_dev->_win & CLIENT_WIN_REQ(i))
382 dev_printk(KERN_INFO, dev,
383 "pcmcia: driver %s did not release window properly\n",
386 /* references from pcmcia_probe_device */
387 pcmcia_put_dev(p_dev);
388 module_put(p_drv->owner);
395 * pcmcia_device_query -- determine information about a pcmcia device
397 static int pcmcia_device_query(struct pcmcia_device *p_dev)
399 cistpl_manfid_t manf_id;
400 cistpl_funcid_t func_id;
401 cistpl_vers_1_t *vers1;
404 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
408 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
409 CISTPL_MANFID, &manf_id)) {
410 mutex_lock(&p_dev->socket->ops_mutex);
411 p_dev->manf_id = manf_id.manf;
412 p_dev->card_id = manf_id.card;
413 p_dev->has_manf_id = 1;
414 p_dev->has_card_id = 1;
415 mutex_unlock(&p_dev->socket->ops_mutex);
418 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
419 CISTPL_FUNCID, &func_id)) {
420 mutex_lock(&p_dev->socket->ops_mutex);
421 p_dev->func_id = func_id.func;
422 p_dev->has_func_id = 1;
423 mutex_unlock(&p_dev->socket->ops_mutex);
425 /* rule of thumb: cards with no FUNCID, but with
426 * common memory device geometry information, are
427 * probably memory cards (from pcmcia-cs) */
428 cistpl_device_geo_t *devgeo;
430 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
435 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
436 CISTPL_DEVICE_GEO, devgeo)) {
438 "mem device geometry probably means "
440 mutex_lock(&p_dev->socket->ops_mutex);
441 p_dev->func_id = CISTPL_FUNCID_MEMORY;
442 p_dev->has_func_id = 1;
443 mutex_unlock(&p_dev->socket->ops_mutex);
448 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
450 mutex_lock(&p_dev->socket->ops_mutex);
451 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
456 tmp = vers1->str + vers1->ofs[i];
458 length = strlen(tmp) + 1;
459 if ((length < 2) || (length > 255))
462 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
466 new = strncpy(new, tmp, length);
468 tmp = p_dev->prod_id[i];
469 p_dev->prod_id[i] = new;
472 mutex_unlock(&p_dev->socket->ops_mutex);
480 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
481 unsigned int function)
483 struct pcmcia_device *p_dev, *tmp_dev;
486 s = pcmcia_get_socket(s);
490 pr_debug("adding device to %d, function %d\n", s->sock, function);
492 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
496 mutex_lock(&s->ops_mutex);
497 p_dev->device_no = (s->device_count++);
498 mutex_unlock(&s->ops_mutex);
500 /* max of 2 PFC devices */
501 if ((p_dev->device_no >= 2) && (function == 0))
504 /* max of 4 devices overall */
505 if (p_dev->device_no >= 4)
509 p_dev->func = function;
511 p_dev->dev.bus = &pcmcia_bus_type;
512 p_dev->dev.parent = s->dev.parent;
513 p_dev->dev.release = pcmcia_release_dev;
514 /* by default don't allow DMA */
515 p_dev->dma_mask = DMA_MASK_NONE;
516 p_dev->dev.dma_mask = &p_dev->dma_mask;
517 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
518 if (!dev_name(&p_dev->dev))
520 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
523 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
525 mutex_lock(&s->ops_mutex);
528 * p_dev->function_config must be the same for all card functions.
529 * Note that this is serialized by ops_mutex, so that only one
530 * such struct will be created.
532 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
533 if (p_dev->func == tmp_dev->func) {
534 p_dev->function_config = tmp_dev->function_config;
535 p_dev->io = tmp_dev->io;
536 p_dev->irq = tmp_dev->irq;
537 kref_get(&p_dev->function_config->ref);
540 /* Add to the list in pcmcia_bus_socket */
541 list_add(&p_dev->socket_device_list, &s->devices_list);
543 if (pcmcia_setup_irq(p_dev))
544 dev_warn(&p_dev->dev,
545 "IRQ setup failed -- device might not work\n");
547 if (!p_dev->function_config) {
548 dev_dbg(&p_dev->dev, "creating config_t\n");
549 p_dev->function_config = kzalloc(sizeof(struct config_t),
551 if (!p_dev->function_config) {
552 mutex_unlock(&s->ops_mutex);
555 kref_init(&p_dev->function_config->ref);
557 mutex_unlock(&s->ops_mutex);
559 dev_printk(KERN_NOTICE, &p_dev->dev,
560 "pcmcia: registering new device %s (IRQ: %d)\n",
561 p_dev->devname, p_dev->irq);
563 pcmcia_device_query(p_dev);
565 if (device_register(&p_dev->dev))
571 mutex_lock(&s->ops_mutex);
572 list_del(&p_dev->socket_device_list);
573 mutex_unlock(&s->ops_mutex);
576 mutex_lock(&s->ops_mutex);
578 mutex_unlock(&s->ops_mutex);
580 for (i = 0; i < 4; i++)
581 kfree(p_dev->prod_id[i]);
582 kfree(p_dev->devname);
585 pcmcia_put_socket(s);
591 static int pcmcia_card_add(struct pcmcia_socket *s)
593 cistpl_longlink_mfc_t mfc;
594 unsigned int no_funcs, i, no_chains;
597 mutex_lock(&s->ops_mutex);
598 if (!(s->resource_setup_done)) {
600 "no resources available, delaying card_add\n");
601 mutex_unlock(&s->ops_mutex);
602 return -EAGAIN; /* try again, but later... */
605 if (pcmcia_validate_mem(s)) {
606 dev_dbg(&s->dev, "validating mem resources failed, "
607 "delaying card_add\n");
608 mutex_unlock(&s->ops_mutex);
609 return -EAGAIN; /* try again, but later... */
611 mutex_unlock(&s->ops_mutex);
613 ret = pccard_validate_cis(s, &no_chains);
614 if (ret || !no_chains) {
615 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
619 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
623 s->functions = no_funcs;
625 for (i = 0; i < no_funcs; i++)
626 pcmcia_device_add(s, i);
632 static int pcmcia_requery_callback(struct device *dev, void * _data)
634 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
635 if (!p_dev->dev.driver) {
636 dev_dbg(dev, "update device information\n");
637 pcmcia_device_query(p_dev);
644 static void pcmcia_requery(struct pcmcia_socket *s)
648 if (s->functions == 0) {
653 /* some device information might have changed because of a CIS
654 * update or because we can finally read it correctly... so
655 * determine it again, overwriting old values if necessary. */
656 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
658 /* if the CIS changed, we need to check whether the number of
659 * functions changed. */
661 int old_funcs, new_funcs;
662 cistpl_longlink_mfc_t mfc;
664 /* does this cis override add or remove functions? */
665 old_funcs = s->functions;
667 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
672 if (old_funcs != new_funcs) {
673 /* we need to re-start */
674 pcmcia_card_remove(s, NULL);
680 /* If the PCMCIA device consists of two pseudo devices,
681 * call pcmcia_device_add() -- which will fail if both
682 * devices are already registered. */
683 mutex_lock(&s->ops_mutex);
684 has_pfc = s->pcmcia_pfc;
685 mutex_unlock(&s->ops_mutex);
687 pcmcia_device_add(s, 0);
689 /* we re-scan all devices, not just the ones connected to this
690 * socket. This does not matter, though. */
691 if (bus_rescan_devices(&pcmcia_bus_type))
692 dev_warn(&s->dev, "rescanning the bus failed\n");
696 #ifdef CONFIG_PCMCIA_LOAD_CIS
699 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
700 * @dev: the pcmcia device which needs a CIS override
701 * @filename: requested filename in /lib/firmware/
703 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
704 * the one provided by the card is broken. The firmware files reside in
705 * /lib/firmware/ in userspace.
707 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
709 struct pcmcia_socket *s = dev->socket;
710 const struct firmware *fw;
712 cistpl_longlink_mfc_t mfc;
713 int old_funcs, new_funcs = 1;
718 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
720 if (request_firmware(&fw, filename, &dev->dev) == 0) {
721 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
723 dev_printk(KERN_ERR, &dev->dev,
724 "pcmcia: CIS override is too big\n");
728 if (!pcmcia_replace_cis(s, fw->data, fw->size))
731 dev_printk(KERN_ERR, &dev->dev,
732 "pcmcia: CIS override failed\n");
736 /* we need to re-start if the number of functions changed */
737 old_funcs = s->functions;
738 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
742 if (old_funcs != new_funcs)
745 /* update information */
746 pcmcia_device_query(dev);
748 /* requery (as number of functions might have changed) */
749 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
752 release_firmware(fw);
757 #else /* !CONFIG_PCMCIA_LOAD_CIS */
759 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
767 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
768 struct pcmcia_device_id *did)
770 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
771 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
775 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
776 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
780 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
781 if (dev->func != did->function)
785 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
786 if (!dev->prod_id[0])
788 if (strcmp(did->prod_id[0], dev->prod_id[0]))
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
793 if (!dev->prod_id[1])
795 if (strcmp(did->prod_id[1], dev->prod_id[1]))
799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
800 if (!dev->prod_id[2])
802 if (strcmp(did->prod_id[2], dev->prod_id[2]))
806 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
807 if (!dev->prod_id[3])
809 if (strcmp(did->prod_id[3], dev->prod_id[3]))
813 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
814 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
815 mutex_lock(&dev->socket->ops_mutex);
816 dev->socket->pcmcia_pfc = 1;
817 mutex_unlock(&dev->socket->ops_mutex);
818 if (dev->device_no != did->device_no)
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
825 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
828 /* if this is a pseudo-multi-function device,
829 * we need explicit matches */
830 if (dev->socket->pcmcia_pfc)
835 /* also, FUNC_ID matching needs to be activated by userspace
836 * after it has re-checked that there is no possible module
837 * with a prod_id/manf_id/card_id match.
839 mutex_lock(&dev->socket->ops_mutex);
840 ret = dev->allow_func_id_match;
841 mutex_unlock(&dev->socket->ops_mutex);
845 "skipping FUNC_ID match until userspace ACK\n");
850 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
851 dev_dbg(&dev->dev, "device needs a fake CIS\n");
852 if (!dev->socket->fake_cis)
853 if (pcmcia_load_firmware(dev, did->cisfile))
857 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
859 for (i = 0; i < 4; i++)
862 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
870 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
872 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
873 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
874 struct pcmcia_device_id *did = p_drv->id_table;
875 struct pcmcia_dynid *dynid;
877 /* match dynamic devices first */
878 mutex_lock(&p_drv->dynids.lock);
879 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
880 dev_dbg(dev, "trying to match to %s\n", drv->name);
881 if (pcmcia_devmatch(p_dev, &dynid->id)) {
882 dev_dbg(dev, "matched to %s\n", drv->name);
883 mutex_unlock(&p_drv->dynids.lock);
887 mutex_unlock(&p_drv->dynids.lock);
889 while (did && did->match_flags) {
890 dev_dbg(dev, "trying to match to %s\n", drv->name);
891 if (pcmcia_devmatch(p_dev, did)) {
892 dev_dbg(dev, "matched to %s\n", drv->name);
901 #ifdef CONFIG_HOTPLUG
903 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
905 struct pcmcia_device *p_dev;
907 u32 hash[4] = { 0, 0, 0, 0};
912 p_dev = to_pcmcia_dev(dev);
914 /* calculate hashes */
915 for (i = 0; i < 4; i++) {
916 if (!p_dev->prod_id[i])
918 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
921 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
924 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
927 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
928 "pa%08Xpb%08Xpc%08Xpd%08X",
929 p_dev->has_manf_id ? p_dev->manf_id : 0,
930 p_dev->has_card_id ? p_dev->card_id : 0,
931 p_dev->has_func_id ? p_dev->func_id : 0,
945 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
952 /************************ runtime PM support ***************************/
954 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
955 static int pcmcia_dev_resume(struct device *dev);
957 static int runtime_suspend(struct device *dev)
962 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
967 static int runtime_resume(struct device *dev)
972 rc = pcmcia_dev_resume(dev);
977 /************************ per-device sysfs output ***************************/
979 #define pcmcia_device_attr(field, test, format) \
980 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
982 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
983 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
986 #define pcmcia_device_stringattr(name, field) \
987 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
989 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
990 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
993 pcmcia_device_attr(func, socket, "0x%02x\n");
994 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
995 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
996 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
997 pcmcia_device_stringattr(prod_id1, prod_id[0]);
998 pcmcia_device_stringattr(prod_id2, prod_id[1]);
999 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1000 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1003 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1005 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1007 if (p_dev->suspended)
1008 return sprintf(buf, "off\n");
1010 return sprintf(buf, "on\n");
1013 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1014 const char *buf, size_t count)
1016 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1022 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1023 ret = runtime_suspend(dev);
1024 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1025 ret = runtime_resume(dev);
1027 return ret ? ret : count;
1031 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1033 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1035 u32 hash[4] = { 0, 0, 0, 0};
1037 /* calculate hashes */
1038 for (i = 0; i < 4; i++) {
1039 if (!p_dev->prod_id[i])
1041 hash[i] = crc32(0, p_dev->prod_id[i],
1042 strlen(p_dev->prod_id[i]));
1044 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1045 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1046 p_dev->has_manf_id ? p_dev->manf_id : 0,
1047 p_dev->has_card_id ? p_dev->card_id : 0,
1048 p_dev->has_func_id ? p_dev->func_id : 0,
1049 p_dev->func, p_dev->device_no,
1050 hash[0], hash[1], hash[2], hash[3]);
1053 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1054 struct device_attribute *attr, const char *buf, size_t count)
1056 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1061 mutex_lock(&p_dev->socket->ops_mutex);
1062 p_dev->allow_func_id_match = 1;
1063 mutex_unlock(&p_dev->socket->ops_mutex);
1064 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1069 static struct device_attribute pcmcia_dev_attrs[] = {
1070 __ATTR(function, 0444, func_show, NULL),
1071 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1075 __ATTR_RO(prod_id1),
1076 __ATTR_RO(prod_id2),
1077 __ATTR_RO(prod_id3),
1078 __ATTR_RO(prod_id4),
1079 __ATTR_RO(modalias),
1080 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1084 /* PM support, also needed for reset */
1086 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1088 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1089 struct pcmcia_driver *p_drv = NULL;
1092 mutex_lock(&p_dev->socket->ops_mutex);
1093 if (p_dev->suspended) {
1094 mutex_unlock(&p_dev->socket->ops_mutex);
1097 p_dev->suspended = 1;
1098 mutex_unlock(&p_dev->socket->ops_mutex);
1100 dev_dbg(dev, "suspending\n");
1103 p_drv = to_pcmcia_drv(dev->driver);
1108 if (p_drv->suspend) {
1109 ret = p_drv->suspend(p_dev);
1111 dev_printk(KERN_ERR, dev,
1112 "pcmcia: device %s (driver %s) did "
1113 "not want to go to sleep (%d)\n",
1114 p_dev->devname, p_drv->drv.name, ret);
1115 mutex_lock(&p_dev->socket->ops_mutex);
1116 p_dev->suspended = 0;
1117 mutex_unlock(&p_dev->socket->ops_mutex);
1122 if (p_dev->device_no == p_dev->func) {
1123 dev_dbg(dev, "releasing configuration\n");
1124 pcmcia_release_configuration(p_dev);
1132 static int pcmcia_dev_resume(struct device *dev)
1134 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1135 struct pcmcia_driver *p_drv = NULL;
1138 mutex_lock(&p_dev->socket->ops_mutex);
1139 if (!p_dev->suspended) {
1140 mutex_unlock(&p_dev->socket->ops_mutex);
1143 p_dev->suspended = 0;
1144 mutex_unlock(&p_dev->socket->ops_mutex);
1146 dev_dbg(dev, "resuming\n");
1149 p_drv = to_pcmcia_drv(dev->driver);
1154 if (p_dev->device_no == p_dev->func) {
1155 dev_dbg(dev, "requesting configuration\n");
1156 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1162 ret = p_drv->resume(p_dev);
1169 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1171 struct pcmcia_socket *skt = _data;
1172 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1174 if (p_dev->socket != skt || p_dev->suspended)
1177 return runtime_suspend(dev);
1180 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1182 struct pcmcia_socket *skt = _data;
1183 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1185 if (p_dev->socket != skt || !p_dev->suspended)
1188 runtime_resume(dev);
1193 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1195 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1196 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1200 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1202 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1203 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1204 pcmcia_bus_suspend_callback)) {
1205 pcmcia_bus_resume(skt);
1211 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1213 atomic_set(&skt->present, 0);
1214 pcmcia_card_remove(skt, NULL);
1216 mutex_lock(&skt->ops_mutex);
1217 destroy_cis_cache(skt);
1218 pcmcia_cleanup_irq(skt);
1219 mutex_unlock(&skt->ops_mutex);
1224 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1226 atomic_set(&skt->present, 1);
1228 mutex_lock(&skt->ops_mutex);
1229 skt->pcmcia_pfc = 0;
1230 destroy_cis_cache(skt); /* to be on the safe side... */
1231 mutex_unlock(&skt->ops_mutex);
1233 pcmcia_card_add(skt);
1238 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1240 if (!verify_cis_cache(skt)) {
1241 pcmcia_put_socket(skt);
1245 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1247 /* first, remove the card */
1248 pcmcia_bus_remove(skt);
1250 mutex_lock(&skt->ops_mutex);
1251 destroy_cis_cache(skt);
1252 kfree(skt->fake_cis);
1253 skt->fake_cis = NULL;
1255 mutex_unlock(&skt->ops_mutex);
1257 /* now, add the new card */
1258 pcmcia_bus_add(skt);
1264 * NOTE: This is racy. There's no guarantee the card will still be
1265 * physically present, even if the call to this function returns
1266 * non-NULL. Furthermore, the device driver most likely is unbound
1267 * almost immediately, so the timeframe where pcmcia_dev_present
1268 * returns NULL is probably really really small.
1270 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1272 struct pcmcia_device *p_dev;
1273 struct pcmcia_device *ret = NULL;
1275 p_dev = pcmcia_get_dev(_p_dev);
1279 if (atomic_read(&p_dev->socket->present) != 0)
1282 pcmcia_put_dev(p_dev);
1285 EXPORT_SYMBOL(pcmcia_dev_present);
1288 static struct pcmcia_callback pcmcia_bus_callback = {
1289 .owner = THIS_MODULE,
1290 .add = pcmcia_bus_add,
1291 .remove = pcmcia_bus_remove,
1292 .requery = pcmcia_requery,
1293 .validate = pccard_validate_cis,
1294 .suspend = pcmcia_bus_suspend,
1295 .early_resume = pcmcia_bus_early_resume,
1296 .resume = pcmcia_bus_resume,
1299 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1300 struct class_interface *class_intf)
1302 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1305 socket = pcmcia_get_socket(socket);
1307 dev_printk(KERN_ERR, dev,
1308 "PCMCIA obtaining reference to socket failed\n");
1312 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1314 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1315 pcmcia_put_socket(socket);
1319 INIT_LIST_HEAD(&socket->devices_list);
1320 socket->pcmcia_pfc = 0;
1321 socket->device_count = 0;
1322 atomic_set(&socket->present, 0);
1324 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1326 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1327 pcmcia_put_socket(socket);
1334 static void pcmcia_bus_remove_socket(struct device *dev,
1335 struct class_interface *class_intf)
1337 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1342 pccard_register_pcmcia(socket, NULL);
1344 /* unregister any unbound devices */
1345 mutex_lock(&socket->skt_mutex);
1346 pcmcia_card_remove(socket, NULL);
1347 release_cis_mem(socket);
1348 mutex_unlock(&socket->skt_mutex);
1350 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1352 pcmcia_put_socket(socket);
1358 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1359 static struct class_interface pcmcia_bus_interface __refdata = {
1360 .class = &pcmcia_socket_class,
1361 .add_dev = &pcmcia_bus_add_socket,
1362 .remove_dev = &pcmcia_bus_remove_socket,
1366 struct bus_type pcmcia_bus_type = {
1368 .uevent = pcmcia_bus_uevent,
1369 .match = pcmcia_bus_match,
1370 .dev_attrs = pcmcia_dev_attrs,
1371 .probe = pcmcia_device_probe,
1372 .remove = pcmcia_device_remove,
1373 .suspend = pcmcia_dev_suspend,
1374 .resume = pcmcia_dev_resume,
1378 static int __init init_pcmcia_bus(void)
1382 ret = bus_register(&pcmcia_bus_type);
1384 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1387 ret = class_interface_register(&pcmcia_bus_interface);
1390 "pcmcia: class_interface_register error: %d\n", ret);
1391 bus_unregister(&pcmcia_bus_type);
1397 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1398 * pcmcia_socket_class is already registered */
1401 static void __exit exit_pcmcia_bus(void)
1403 class_interface_unregister(&pcmcia_bus_interface);
1405 bus_unregister(&pcmcia_bus_type);
1407 module_exit(exit_pcmcia_bus);