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/cistpl.h>
30 #include <pcmcia/ds.h>
31 #include <pcmcia/ss.h>
33 #include "cs_internal.h"
35 /*====================================================================*/
37 /* Module parameters */
39 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40 MODULE_DESCRIPTION("PCMCIA Driver Services");
41 MODULE_LICENSE("GPL");
44 /*====================================================================*/
46 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
48 const struct pcmcia_device_id *did = p_drv->id_table;
52 if (!p_drv->probe || !p_drv->remove)
53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54 "function\n", p_drv->name);
56 while (did && did->match_flags) {
57 for (i = 0; i < 4; i++) {
61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62 if (hash == did->prod_id_hash[i])
65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66 "product string \"%s\": is 0x%x, should "
67 "be 0x%x\n", p_drv->name, did->prod_id[i],
68 did->prod_id_hash[i], hash);
69 printk(KERN_DEBUG "pcmcia: see "
70 "Documentation/pcmcia/devicetable.txt for "
80 /*======================================================================*/
84 struct list_head node;
85 struct pcmcia_device_id id;
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
98 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
100 struct pcmcia_dynid *dynid;
101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102 __u16 match_flags, manf_id, card_id;
103 __u8 func_id, function, device_no;
104 __u32 prod_id_hash[4] = {0, 0, 0, 0};
108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
118 dynid->id.match_flags = match_flags;
119 dynid->id.manf_id = manf_id;
120 dynid->id.card_id = card_id;
121 dynid->id.func_id = func_id;
122 dynid->id.function = function;
123 dynid->id.device_no = device_no;
124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
126 mutex_lock(&pdrv->dynids.lock);
127 list_add_tail(&dynid->node, &pdrv->dynids.list);
128 mutex_unlock(&pdrv->dynids.lock);
130 retval = driver_attach(&pdrv->drv);
136 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
139 pcmcia_free_dynids(struct pcmcia_driver *drv)
141 struct pcmcia_dynid *dynid, *n;
143 mutex_lock(&drv->dynids.lock);
144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145 list_del(&dynid->node);
148 mutex_unlock(&drv->dynids.lock);
152 pcmcia_create_newid_file(struct pcmcia_driver *drv)
155 if (drv->probe != NULL)
156 error = driver_create_file(&drv->drv, &driver_attr_new_id);
162 * pcmcia_register_driver - register a PCMCIA driver with the bus core
163 * @driver: the &driver being registered
165 * Registers a PCMCIA driver with the PCMCIA bus core.
167 int pcmcia_register_driver(struct pcmcia_driver *driver)
174 pcmcia_check_driver(driver);
176 /* initialize common fields */
177 driver->drv.bus = &pcmcia_bus_type;
178 driver->drv.owner = driver->owner;
179 driver->drv.name = driver->name;
180 mutex_init(&driver->dynids.lock);
181 INIT_LIST_HEAD(&driver->dynids.list);
183 pr_debug("registering driver %s\n", driver->name);
185 error = driver_register(&driver->drv);
189 error = pcmcia_create_newid_file(driver);
191 driver_unregister(&driver->drv);
195 EXPORT_SYMBOL(pcmcia_register_driver);
198 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
199 * @driver: the &driver being unregistered
201 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
203 pr_debug("unregistering driver %s\n", driver->name);
204 driver_unregister(&driver->drv);
205 pcmcia_free_dynids(driver);
207 EXPORT_SYMBOL(pcmcia_unregister_driver);
210 /* pcmcia_device handling */
212 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
214 struct device *tmp_dev;
215 tmp_dev = get_device(&p_dev->dev);
218 return to_pcmcia_dev(tmp_dev);
221 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
224 put_device(&p_dev->dev);
227 static void pcmcia_release_function(struct kref *ref)
229 struct config_t *c = container_of(ref, struct config_t, ref);
230 pr_debug("releasing config_t\n");
234 static void pcmcia_release_dev(struct device *dev)
236 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
238 dev_dbg(dev, "releasing device\n");
239 pcmcia_put_socket(p_dev->socket);
240 for (i = 0; i < 4; i++)
241 kfree(p_dev->prod_id[i]);
242 kfree(p_dev->devname);
243 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
248 static int pcmcia_device_probe(struct device *dev)
250 struct pcmcia_device *p_dev;
251 struct pcmcia_driver *p_drv;
252 struct pcmcia_socket *s;
253 cistpl_config_t cis_config;
256 dev = get_device(dev);
260 p_dev = to_pcmcia_dev(dev);
261 p_drv = to_pcmcia_drv(dev->driver);
264 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
266 if ((!p_drv->probe) || (!p_dev->function_config) ||
267 (!try_module_get(p_drv->owner))) {
272 /* set up some more device information */
273 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
276 p_dev->config_base = cis_config.base;
277 p_dev->config_regs = cis_config.rmask[0];
278 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
281 dev_printk(KERN_INFO, dev,
282 "pcmcia: could not parse base and rmask0 of CIS\n");
283 p_dev->config_base = 0;
284 p_dev->config_regs = 0;
287 ret = p_drv->probe(p_dev);
289 dev_dbg(dev, "binding to %s failed with %d\n",
293 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
294 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
295 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
296 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
297 p_dev->resource[3], p_dev->resource[4]);
299 mutex_lock(&s->ops_mutex);
300 if ((s->pcmcia_pfc) &&
301 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
302 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
303 mutex_unlock(&s->ops_mutex);
307 module_put(p_drv->owner);
316 * Removes a PCMCIA card from the device tree and socket list.
318 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
320 struct pcmcia_device *p_dev;
321 struct pcmcia_device *tmp;
323 dev_dbg(leftover ? &leftover->dev : &s->dev,
324 "pcmcia_card_remove(%d) %s\n", s->sock,
325 leftover ? leftover->devname : "");
327 mutex_lock(&s->ops_mutex);
332 mutex_unlock(&s->ops_mutex);
334 /* unregister all pcmcia_devices registered with this socket, except leftover */
335 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
336 if (p_dev == leftover)
339 mutex_lock(&s->ops_mutex);
340 list_del(&p_dev->socket_device_list);
341 mutex_unlock(&s->ops_mutex);
343 dev_dbg(&p_dev->dev, "unregistering device\n");
344 device_unregister(&p_dev->dev);
350 static int pcmcia_device_remove(struct device *dev)
352 struct pcmcia_device *p_dev;
353 struct pcmcia_driver *p_drv;
356 p_dev = to_pcmcia_dev(dev);
357 p_drv = to_pcmcia_drv(dev->driver);
359 dev_dbg(dev, "removing device\n");
361 /* If we're removing the primary module driving a
362 * pseudo multi-function card, we need to unbind
365 if ((p_dev->socket->pcmcia_pfc) &&
366 (p_dev->socket->device_count > 0) &&
367 (p_dev->device_no == 0))
368 pcmcia_card_remove(p_dev->socket, p_dev);
370 /* detach the "instance" */
375 p_drv->remove(p_dev);
377 /* check for proper unloading */
378 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
379 dev_printk(KERN_INFO, dev,
380 "pcmcia: driver %s did not release config properly\n",
383 for (i = 0; i < MAX_WIN; i++)
384 if (p_dev->_win & CLIENT_WIN_REQ(i))
385 dev_printk(KERN_INFO, dev,
386 "pcmcia: driver %s did not release window properly\n",
389 /* references from pcmcia_probe_device */
390 pcmcia_put_dev(p_dev);
391 module_put(p_drv->owner);
398 * pcmcia_device_query -- determine information about a pcmcia device
400 static int pcmcia_device_query(struct pcmcia_device *p_dev)
402 cistpl_manfid_t manf_id;
403 cistpl_funcid_t func_id;
404 cistpl_vers_1_t *vers1;
407 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
411 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
412 CISTPL_MANFID, &manf_id)) {
413 mutex_lock(&p_dev->socket->ops_mutex);
414 p_dev->manf_id = manf_id.manf;
415 p_dev->card_id = manf_id.card;
416 p_dev->has_manf_id = 1;
417 p_dev->has_card_id = 1;
418 mutex_unlock(&p_dev->socket->ops_mutex);
421 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
422 CISTPL_FUNCID, &func_id)) {
423 mutex_lock(&p_dev->socket->ops_mutex);
424 p_dev->func_id = func_id.func;
425 p_dev->has_func_id = 1;
426 mutex_unlock(&p_dev->socket->ops_mutex);
428 /* rule of thumb: cards with no FUNCID, but with
429 * common memory device geometry information, are
430 * probably memory cards (from pcmcia-cs) */
431 cistpl_device_geo_t *devgeo;
433 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
438 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
439 CISTPL_DEVICE_GEO, devgeo)) {
441 "mem device geometry probably means "
443 mutex_lock(&p_dev->socket->ops_mutex);
444 p_dev->func_id = CISTPL_FUNCID_MEMORY;
445 p_dev->has_func_id = 1;
446 mutex_unlock(&p_dev->socket->ops_mutex);
451 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
453 mutex_lock(&p_dev->socket->ops_mutex);
454 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
459 tmp = vers1->str + vers1->ofs[i];
461 length = strlen(tmp) + 1;
462 if ((length < 2) || (length > 255))
465 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
469 new = strncpy(new, tmp, length);
471 tmp = p_dev->prod_id[i];
472 p_dev->prod_id[i] = new;
475 mutex_unlock(&p_dev->socket->ops_mutex);
483 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
484 unsigned int function)
486 struct pcmcia_device *p_dev, *tmp_dev;
489 s = pcmcia_get_socket(s);
493 pr_debug("adding device to %d, function %d\n", s->sock, function);
495 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
499 mutex_lock(&s->ops_mutex);
500 p_dev->device_no = (s->device_count++);
501 mutex_unlock(&s->ops_mutex);
503 /* max of 2 PFC devices */
504 if ((p_dev->device_no >= 2) && (function == 0))
507 /* max of 4 devices overall */
508 if (p_dev->device_no >= 4)
512 p_dev->func = function;
514 p_dev->dev.bus = &pcmcia_bus_type;
515 p_dev->dev.parent = s->dev.parent;
516 p_dev->dev.release = pcmcia_release_dev;
517 /* by default don't allow DMA */
518 p_dev->dma_mask = DMA_MASK_NONE;
519 p_dev->dev.dma_mask = &p_dev->dma_mask;
520 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
521 if (!dev_name(&p_dev->dev))
523 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
526 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
528 mutex_lock(&s->ops_mutex);
531 * p_dev->function_config must be the same for all card functions.
532 * Note that this is serialized by ops_mutex, so that only one
533 * such struct will be created.
535 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
536 if (p_dev->func == tmp_dev->func) {
537 p_dev->function_config = tmp_dev->function_config;
538 p_dev->irq = tmp_dev->irq;
539 kref_get(&p_dev->function_config->ref);
542 /* Add to the list in pcmcia_bus_socket */
543 list_add(&p_dev->socket_device_list, &s->devices_list);
545 if (pcmcia_setup_irq(p_dev))
546 dev_warn(&p_dev->dev,
547 "IRQ setup failed -- device might not work\n");
549 if (!p_dev->function_config) {
551 dev_dbg(&p_dev->dev, "creating config_t\n");
552 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
554 mutex_unlock(&s->ops_mutex);
557 p_dev->function_config = c;
559 for (i = 0; i < MAX_IO_WIN; i++) {
560 c->io[i].name = p_dev->devname;
561 c->io[i].flags = IORESOURCE_IO;
563 for (i = 0; i< MAX_WIN; i++) {
564 c->mem[i].name = p_dev->devname;
565 c->mem[i].flags = IORESOURCE_MEM;
568 for (i = 0; i < MAX_IO_WIN; i++)
569 p_dev->resource[i] = &p_dev->function_config->io[i];
570 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
571 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
573 mutex_unlock(&s->ops_mutex);
575 dev_printk(KERN_NOTICE, &p_dev->dev,
576 "pcmcia: registering new device %s (IRQ: %d)\n",
577 p_dev->devname, p_dev->irq);
579 pcmcia_device_query(p_dev);
581 if (device_register(&p_dev->dev))
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 for (i = 0; i < 4; i++)
597 kfree(p_dev->prod_id[i]);
598 kfree(p_dev->devname);
601 pcmcia_put_socket(s);
607 static int pcmcia_card_add(struct pcmcia_socket *s)
609 cistpl_longlink_mfc_t mfc;
610 unsigned int no_funcs, i, no_chains;
613 mutex_lock(&s->ops_mutex);
614 if (!(s->resource_setup_done)) {
616 "no resources available, delaying card_add\n");
617 mutex_unlock(&s->ops_mutex);
618 return -EAGAIN; /* try again, but later... */
621 if (pcmcia_validate_mem(s)) {
622 dev_dbg(&s->dev, "validating mem resources failed, "
623 "delaying card_add\n");
624 mutex_unlock(&s->ops_mutex);
625 return -EAGAIN; /* try again, but later... */
627 mutex_unlock(&s->ops_mutex);
629 ret = pccard_validate_cis(s, &no_chains);
630 if (ret || !no_chains) {
631 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
635 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
639 s->functions = no_funcs;
641 for (i = 0; i < no_funcs; i++)
642 pcmcia_device_add(s, i);
648 static int pcmcia_requery_callback(struct device *dev, void * _data)
650 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
651 if (!p_dev->dev.driver) {
652 dev_dbg(dev, "update device information\n");
653 pcmcia_device_query(p_dev);
660 static void pcmcia_requery(struct pcmcia_socket *s)
664 if (s->functions == 0) {
669 /* some device information might have changed because of a CIS
670 * update or because we can finally read it correctly... so
671 * determine it again, overwriting old values if necessary. */
672 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
674 /* if the CIS changed, we need to check whether the number of
675 * functions changed. */
677 int old_funcs, new_funcs;
678 cistpl_longlink_mfc_t mfc;
680 /* does this cis override add or remove functions? */
681 old_funcs = s->functions;
683 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
688 if (old_funcs != new_funcs) {
689 /* we need to re-start */
690 pcmcia_card_remove(s, NULL);
696 /* If the PCMCIA device consists of two pseudo devices,
697 * call pcmcia_device_add() -- which will fail if both
698 * devices are already registered. */
699 mutex_lock(&s->ops_mutex);
700 has_pfc = s->pcmcia_pfc;
701 mutex_unlock(&s->ops_mutex);
703 pcmcia_device_add(s, 0);
705 /* we re-scan all devices, not just the ones connected to this
706 * socket. This does not matter, though. */
707 if (bus_rescan_devices(&pcmcia_bus_type))
708 dev_warn(&s->dev, "rescanning the bus failed\n");
712 #ifdef CONFIG_PCMCIA_LOAD_CIS
715 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
716 * @dev: the pcmcia device which needs a CIS override
717 * @filename: requested filename in /lib/firmware/
719 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
720 * the one provided by the card is broken. The firmware files reside in
721 * /lib/firmware/ in userspace.
723 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
725 struct pcmcia_socket *s = dev->socket;
726 const struct firmware *fw;
728 cistpl_longlink_mfc_t mfc;
729 int old_funcs, new_funcs = 1;
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");
752 /* we need to re-start if the number of functions changed */
753 old_funcs = s->functions;
754 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
758 if (old_funcs != new_funcs)
761 /* update information */
762 pcmcia_device_query(dev);
764 /* requery (as number of functions might have changed) */
765 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
768 release_firmware(fw);
773 #else /* !CONFIG_PCMCIA_LOAD_CIS */
775 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
783 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
784 const struct pcmcia_device_id *did)
786 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
787 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
791 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
792 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
796 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
797 if (dev->func != did->function)
801 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
802 if (!dev->prod_id[0])
804 if (strcmp(did->prod_id[0], dev->prod_id[0]))
808 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
809 if (!dev->prod_id[1])
811 if (strcmp(did->prod_id[1], dev->prod_id[1]))
815 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
816 if (!dev->prod_id[2])
818 if (strcmp(did->prod_id[2], dev->prod_id[2]))
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
823 if (!dev->prod_id[3])
825 if (strcmp(did->prod_id[3], dev->prod_id[3]))
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
830 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
831 mutex_lock(&dev->socket->ops_mutex);
832 dev->socket->pcmcia_pfc = 1;
833 mutex_unlock(&dev->socket->ops_mutex);
834 if (dev->device_no != did->device_no)
838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
841 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
844 /* if this is a pseudo-multi-function device,
845 * we need explicit matches */
846 if (dev->socket->pcmcia_pfc)
851 /* also, FUNC_ID matching needs to be activated by userspace
852 * after it has re-checked that there is no possible module
853 * with a prod_id/manf_id/card_id match.
855 mutex_lock(&dev->socket->ops_mutex);
856 ret = dev->allow_func_id_match;
857 mutex_unlock(&dev->socket->ops_mutex);
861 "skipping FUNC_ID match until userspace ACK\n");
866 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
867 dev_dbg(&dev->dev, "device needs a fake CIS\n");
868 if (!dev->socket->fake_cis)
869 if (pcmcia_load_firmware(dev, did->cisfile))
873 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
875 for (i = 0; i < 4; i++)
878 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
886 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
888 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
889 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
890 const struct pcmcia_device_id *did = p_drv->id_table;
891 struct pcmcia_dynid *dynid;
893 /* match dynamic devices first */
894 mutex_lock(&p_drv->dynids.lock);
895 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
896 dev_dbg(dev, "trying to match to %s\n", drv->name);
897 if (pcmcia_devmatch(p_dev, &dynid->id)) {
898 dev_dbg(dev, "matched to %s\n", drv->name);
899 mutex_unlock(&p_drv->dynids.lock);
903 mutex_unlock(&p_drv->dynids.lock);
905 while (did && did->match_flags) {
906 dev_dbg(dev, "trying to match to %s\n", drv->name);
907 if (pcmcia_devmatch(p_dev, did)) {
908 dev_dbg(dev, "matched to %s\n", drv->name);
917 #ifdef CONFIG_HOTPLUG
919 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
921 struct pcmcia_device *p_dev;
923 u32 hash[4] = { 0, 0, 0, 0};
928 p_dev = to_pcmcia_dev(dev);
930 /* calculate hashes */
931 for (i = 0; i < 4; i++) {
932 if (!p_dev->prod_id[i])
934 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
937 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
940 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
943 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
944 "pa%08Xpb%08Xpc%08Xpd%08X",
945 p_dev->has_manf_id ? p_dev->manf_id : 0,
946 p_dev->has_card_id ? p_dev->card_id : 0,
947 p_dev->has_func_id ? p_dev->func_id : 0,
961 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
968 /************************ runtime PM support ***************************/
970 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
971 static int pcmcia_dev_resume(struct device *dev);
973 static int runtime_suspend(struct device *dev)
978 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
983 static int runtime_resume(struct device *dev)
988 rc = pcmcia_dev_resume(dev);
993 /************************ per-device sysfs output ***************************/
995 #define pcmcia_device_attr(field, test, format) \
996 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
998 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
999 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1002 #define pcmcia_device_stringattr(name, field) \
1003 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1005 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1006 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1009 pcmcia_device_attr(func, socket, "0x%02x\n");
1010 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1011 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1012 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1013 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1014 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1015 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1016 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1018 static ssize_t pcmcia_show_resources(struct device *dev,
1019 struct device_attribute *attr, char *buf)
1021 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1026 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1031 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1033 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1035 if (p_dev->suspended)
1036 return sprintf(buf, "off\n");
1038 return sprintf(buf, "on\n");
1041 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1042 const char *buf, size_t count)
1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1050 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1051 ret = runtime_suspend(dev);
1052 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1053 ret = runtime_resume(dev);
1055 return ret ? ret : count;
1059 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1061 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1063 u32 hash[4] = { 0, 0, 0, 0};
1065 /* calculate hashes */
1066 for (i = 0; i < 4; i++) {
1067 if (!p_dev->prod_id[i])
1069 hash[i] = crc32(0, p_dev->prod_id[i],
1070 strlen(p_dev->prod_id[i]));
1072 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1073 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1074 p_dev->has_manf_id ? p_dev->manf_id : 0,
1075 p_dev->has_card_id ? p_dev->card_id : 0,
1076 p_dev->has_func_id ? p_dev->func_id : 0,
1077 p_dev->func, p_dev->device_no,
1078 hash[0], hash[1], hash[2], hash[3]);
1081 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1082 struct device_attribute *attr, const char *buf, size_t count)
1084 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1089 mutex_lock(&p_dev->socket->ops_mutex);
1090 p_dev->allow_func_id_match = 1;
1091 mutex_unlock(&p_dev->socket->ops_mutex);
1092 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1097 static struct device_attribute pcmcia_dev_attrs[] = {
1098 __ATTR(function, 0444, func_show, NULL),
1099 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1100 __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1104 __ATTR_RO(prod_id1),
1105 __ATTR_RO(prod_id2),
1106 __ATTR_RO(prod_id3),
1107 __ATTR_RO(prod_id4),
1108 __ATTR_RO(modalias),
1109 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1113 /* PM support, also needed for reset */
1115 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1117 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1118 struct pcmcia_driver *p_drv = NULL;
1121 mutex_lock(&p_dev->socket->ops_mutex);
1122 if (p_dev->suspended) {
1123 mutex_unlock(&p_dev->socket->ops_mutex);
1126 p_dev->suspended = 1;
1127 mutex_unlock(&p_dev->socket->ops_mutex);
1129 dev_dbg(dev, "suspending\n");
1132 p_drv = to_pcmcia_drv(dev->driver);
1137 if (p_drv->suspend) {
1138 ret = p_drv->suspend(p_dev);
1140 dev_printk(KERN_ERR, dev,
1141 "pcmcia: device %s (driver %s) did "
1142 "not want to go to sleep (%d)\n",
1143 p_dev->devname, p_drv->name, ret);
1144 mutex_lock(&p_dev->socket->ops_mutex);
1145 p_dev->suspended = 0;
1146 mutex_unlock(&p_dev->socket->ops_mutex);
1151 if (p_dev->device_no == p_dev->func) {
1152 dev_dbg(dev, "releasing configuration\n");
1153 pcmcia_release_configuration(p_dev);
1161 static int pcmcia_dev_resume(struct device *dev)
1163 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1164 struct pcmcia_driver *p_drv = NULL;
1167 mutex_lock(&p_dev->socket->ops_mutex);
1168 if (!p_dev->suspended) {
1169 mutex_unlock(&p_dev->socket->ops_mutex);
1172 p_dev->suspended = 0;
1173 mutex_unlock(&p_dev->socket->ops_mutex);
1175 dev_dbg(dev, "resuming\n");
1178 p_drv = to_pcmcia_drv(dev->driver);
1183 if (p_dev->device_no == p_dev->func) {
1184 dev_dbg(dev, "requesting configuration\n");
1185 ret = pcmcia_enable_device(p_dev);
1191 ret = p_drv->resume(p_dev);
1198 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1200 struct pcmcia_socket *skt = _data;
1201 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1203 if (p_dev->socket != skt || p_dev->suspended)
1206 return runtime_suspend(dev);
1209 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1211 struct pcmcia_socket *skt = _data;
1212 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1214 if (p_dev->socket != skt || !p_dev->suspended)
1217 runtime_resume(dev);
1222 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1224 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1225 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1229 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1231 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1232 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1233 pcmcia_bus_suspend_callback)) {
1234 pcmcia_bus_resume(skt);
1240 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1242 atomic_set(&skt->present, 0);
1243 pcmcia_card_remove(skt, NULL);
1245 mutex_lock(&skt->ops_mutex);
1246 destroy_cis_cache(skt);
1247 pcmcia_cleanup_irq(skt);
1248 mutex_unlock(&skt->ops_mutex);
1253 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1255 atomic_set(&skt->present, 1);
1257 mutex_lock(&skt->ops_mutex);
1258 skt->pcmcia_pfc = 0;
1259 destroy_cis_cache(skt); /* to be on the safe side... */
1260 mutex_unlock(&skt->ops_mutex);
1262 pcmcia_card_add(skt);
1267 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1269 if (!verify_cis_cache(skt)) {
1270 pcmcia_put_socket(skt);
1274 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1276 /* first, remove the card */
1277 pcmcia_bus_remove(skt);
1279 mutex_lock(&skt->ops_mutex);
1280 destroy_cis_cache(skt);
1281 kfree(skt->fake_cis);
1282 skt->fake_cis = NULL;
1284 mutex_unlock(&skt->ops_mutex);
1286 /* now, add the new card */
1287 pcmcia_bus_add(skt);
1293 * NOTE: This is racy. There's no guarantee the card will still be
1294 * physically present, even if the call to this function returns
1295 * non-NULL. Furthermore, the device driver most likely is unbound
1296 * almost immediately, so the timeframe where pcmcia_dev_present
1297 * returns NULL is probably really really small.
1299 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1301 struct pcmcia_device *p_dev;
1302 struct pcmcia_device *ret = NULL;
1304 p_dev = pcmcia_get_dev(_p_dev);
1308 if (atomic_read(&p_dev->socket->present) != 0)
1311 pcmcia_put_dev(p_dev);
1314 EXPORT_SYMBOL(pcmcia_dev_present);
1317 static struct pcmcia_callback pcmcia_bus_callback = {
1318 .owner = THIS_MODULE,
1319 .add = pcmcia_bus_add,
1320 .remove = pcmcia_bus_remove,
1321 .requery = pcmcia_requery,
1322 .validate = pccard_validate_cis,
1323 .suspend = pcmcia_bus_suspend,
1324 .early_resume = pcmcia_bus_early_resume,
1325 .resume = pcmcia_bus_resume,
1328 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1329 struct class_interface *class_intf)
1331 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1334 socket = pcmcia_get_socket(socket);
1336 dev_printk(KERN_ERR, dev,
1337 "PCMCIA obtaining reference to socket failed\n");
1341 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1343 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1344 pcmcia_put_socket(socket);
1348 INIT_LIST_HEAD(&socket->devices_list);
1349 socket->pcmcia_pfc = 0;
1350 socket->device_count = 0;
1351 atomic_set(&socket->present, 0);
1353 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1355 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1356 pcmcia_put_socket(socket);
1363 static void pcmcia_bus_remove_socket(struct device *dev,
1364 struct class_interface *class_intf)
1366 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1371 pccard_register_pcmcia(socket, NULL);
1373 /* unregister any unbound devices */
1374 mutex_lock(&socket->skt_mutex);
1375 pcmcia_card_remove(socket, NULL);
1376 release_cis_mem(socket);
1377 mutex_unlock(&socket->skt_mutex);
1379 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1381 pcmcia_put_socket(socket);
1387 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1388 static struct class_interface pcmcia_bus_interface __refdata = {
1389 .class = &pcmcia_socket_class,
1390 .add_dev = &pcmcia_bus_add_socket,
1391 .remove_dev = &pcmcia_bus_remove_socket,
1395 struct bus_type pcmcia_bus_type = {
1397 .uevent = pcmcia_bus_uevent,
1398 .match = pcmcia_bus_match,
1399 .dev_attrs = pcmcia_dev_attrs,
1400 .probe = pcmcia_device_probe,
1401 .remove = pcmcia_device_remove,
1402 .suspend = pcmcia_dev_suspend,
1403 .resume = pcmcia_dev_resume,
1407 static int __init init_pcmcia_bus(void)
1411 ret = bus_register(&pcmcia_bus_type);
1413 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1416 ret = class_interface_register(&pcmcia_bus_interface);
1419 "pcmcia: class_interface_register error: %d\n", ret);
1420 bus_unregister(&pcmcia_bus_type);
1426 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1427 * pcmcia_socket_class is already registered */
1430 static void __exit exit_pcmcia_bus(void)
1432 class_interface_unregister(&pcmcia_bus_interface);
1434 bus_unregister(&pcmcia_bus_type);
1436 module_exit(exit_pcmcia_bus);