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 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->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->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 if (get_driver(&pdrv->drv)) {
131 retval = driver_attach(&pdrv->drv);
132 put_driver(&pdrv->drv);
139 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
142 pcmcia_free_dynids(struct pcmcia_driver *drv)
144 struct pcmcia_dynid *dynid, *n;
146 mutex_lock(&drv->dynids.lock);
147 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
148 list_del(&dynid->node);
151 mutex_unlock(&drv->dynids.lock);
155 pcmcia_create_newid_file(struct pcmcia_driver *drv)
158 if (drv->probe != NULL)
159 error = driver_create_file(&drv->drv, &driver_attr_new_id);
165 * pcmcia_register_driver - register a PCMCIA driver with the bus core
166 * @driver: the &driver being registered
168 * Registers a PCMCIA driver with the PCMCIA bus core.
170 int pcmcia_register_driver(struct pcmcia_driver *driver)
177 pcmcia_check_driver(driver);
179 /* initialize common fields */
180 driver->drv.bus = &pcmcia_bus_type;
181 driver->drv.owner = driver->owner;
182 mutex_init(&driver->dynids.lock);
183 INIT_LIST_HEAD(&driver->dynids.list);
185 pr_debug("registering driver %s\n", driver->drv.name);
187 error = driver_register(&driver->drv);
191 error = pcmcia_create_newid_file(driver);
193 driver_unregister(&driver->drv);
197 EXPORT_SYMBOL(pcmcia_register_driver);
200 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
201 * @driver: the &driver being unregistered
203 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
205 pr_debug("unregistering driver %s\n", driver->drv.name);
206 driver_unregister(&driver->drv);
207 pcmcia_free_dynids(driver);
209 EXPORT_SYMBOL(pcmcia_unregister_driver);
212 /* pcmcia_device handling */
214 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
216 struct device *tmp_dev;
217 tmp_dev = get_device(&p_dev->dev);
220 return to_pcmcia_dev(tmp_dev);
223 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
226 put_device(&p_dev->dev);
229 static void pcmcia_release_function(struct kref *ref)
231 struct config_t *c = container_of(ref, struct config_t, ref);
232 pr_debug("releasing config_t\n");
236 static void pcmcia_release_dev(struct device *dev)
238 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
240 dev_dbg(dev, "releasing device\n");
241 pcmcia_put_socket(p_dev->socket);
242 for (i = 0; i < 4; i++)
243 kfree(p_dev->prod_id[i]);
244 kfree(p_dev->devname);
245 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250 static int pcmcia_device_probe(struct device *dev)
252 struct pcmcia_device *p_dev;
253 struct pcmcia_driver *p_drv;
254 struct pcmcia_socket *s;
255 cistpl_config_t cis_config;
258 dev = get_device(dev);
262 p_dev = to_pcmcia_dev(dev);
263 p_drv = to_pcmcia_drv(dev->driver);
266 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
268 if ((!p_drv->probe) || (!p_dev->function_config) ||
269 (!try_module_get(p_drv->owner))) {
274 /* set up some more device information */
275 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
278 p_dev->config_base = cis_config.base;
279 p_dev->config_regs = cis_config.rmask[0];
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",
290 p_drv->drv.name, ret);
294 mutex_lock(&s->ops_mutex);
295 if ((s->pcmcia_pfc) &&
296 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
297 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
298 mutex_unlock(&s->ops_mutex);
302 module_put(p_drv->owner);
311 * Removes a PCMCIA card from the device tree and socket list.
313 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
315 struct pcmcia_device *p_dev;
316 struct pcmcia_device *tmp;
318 dev_dbg(leftover ? &leftover->dev : &s->dev,
319 "pcmcia_card_remove(%d) %s\n", s->sock,
320 leftover ? leftover->devname : "");
322 mutex_lock(&s->ops_mutex);
327 mutex_unlock(&s->ops_mutex);
329 /* unregister all pcmcia_devices registered with this socket, except leftover */
330 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
331 if (p_dev == leftover)
334 mutex_lock(&s->ops_mutex);
335 list_del(&p_dev->socket_device_list);
336 mutex_unlock(&s->ops_mutex);
338 dev_dbg(&p_dev->dev, "unregistering device\n");
339 device_unregister(&p_dev->dev);
345 static int pcmcia_device_remove(struct device *dev)
347 struct pcmcia_device *p_dev;
348 struct pcmcia_driver *p_drv;
351 p_dev = to_pcmcia_dev(dev);
352 p_drv = to_pcmcia_drv(dev->driver);
354 dev_dbg(dev, "removing device\n");
356 /* If we're removing the primary module driving a
357 * pseudo multi-function card, we need to unbind
360 if ((p_dev->socket->pcmcia_pfc) &&
361 (p_dev->socket->device_count > 0) &&
362 (p_dev->device_no == 0))
363 pcmcia_card_remove(p_dev->socket, p_dev);
365 /* detach the "instance" */
370 p_drv->remove(p_dev);
372 /* check for proper unloading */
373 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
374 dev_printk(KERN_INFO, dev,
375 "pcmcia: driver %s did not release config properly\n",
378 for (i = 0; i < MAX_WIN; i++)
379 if (p_dev->_win & CLIENT_WIN_REQ(i))
380 dev_printk(KERN_INFO, dev,
381 "pcmcia: driver %s did not release window properly\n",
384 /* references from pcmcia_probe_device */
385 pcmcia_put_dev(p_dev);
386 module_put(p_drv->owner);
393 * pcmcia_device_query -- determine information about a pcmcia device
395 static int pcmcia_device_query(struct pcmcia_device *p_dev)
397 cistpl_manfid_t manf_id;
398 cistpl_funcid_t func_id;
399 cistpl_vers_1_t *vers1;
402 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
406 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
407 CISTPL_MANFID, &manf_id)) {
408 mutex_lock(&p_dev->socket->ops_mutex);
409 p_dev->manf_id = manf_id.manf;
410 p_dev->card_id = manf_id.card;
411 p_dev->has_manf_id = 1;
412 p_dev->has_card_id = 1;
413 mutex_unlock(&p_dev->socket->ops_mutex);
416 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
417 CISTPL_FUNCID, &func_id)) {
418 mutex_lock(&p_dev->socket->ops_mutex);
419 p_dev->func_id = func_id.func;
420 p_dev->has_func_id = 1;
421 mutex_unlock(&p_dev->socket->ops_mutex);
423 /* rule of thumb: cards with no FUNCID, but with
424 * common memory device geometry information, are
425 * probably memory cards (from pcmcia-cs) */
426 cistpl_device_geo_t *devgeo;
428 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
433 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
434 CISTPL_DEVICE_GEO, devgeo)) {
436 "mem device geometry probably means "
438 mutex_lock(&p_dev->socket->ops_mutex);
439 p_dev->func_id = CISTPL_FUNCID_MEMORY;
440 p_dev->has_func_id = 1;
441 mutex_unlock(&p_dev->socket->ops_mutex);
446 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
448 mutex_lock(&p_dev->socket->ops_mutex);
449 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
454 tmp = vers1->str + vers1->ofs[i];
456 length = strlen(tmp) + 1;
457 if ((length < 2) || (length > 255))
460 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
464 new = strncpy(new, tmp, length);
466 tmp = p_dev->prod_id[i];
467 p_dev->prod_id[i] = new;
470 mutex_unlock(&p_dev->socket->ops_mutex);
478 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
479 unsigned int function)
481 struct pcmcia_device *p_dev, *tmp_dev;
484 s = pcmcia_get_socket(s);
488 pr_debug("adding device to %d, function %d\n", s->sock, function);
490 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
494 mutex_lock(&s->ops_mutex);
495 p_dev->device_no = (s->device_count++);
496 mutex_unlock(&s->ops_mutex);
498 /* max of 2 PFC devices */
499 if ((p_dev->device_no >= 2) && (function == 0))
502 /* max of 4 devices overall */
503 if (p_dev->device_no >= 4)
507 p_dev->func = function;
509 p_dev->dev.bus = &pcmcia_bus_type;
510 p_dev->dev.parent = s->dev.parent;
511 p_dev->dev.release = pcmcia_release_dev;
512 /* by default don't allow DMA */
513 p_dev->dma_mask = DMA_MASK_NONE;
514 p_dev->dev.dma_mask = &p_dev->dma_mask;
515 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
516 if (!dev_name(&p_dev->dev))
518 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
521 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
523 mutex_lock(&s->ops_mutex);
526 * p_dev->function_config must be the same for all card functions.
527 * Note that this is serialized by ops_mutex, so that only one
528 * such struct will be created.
530 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
531 if (p_dev->func == tmp_dev->func) {
532 p_dev->function_config = tmp_dev->function_config;
533 p_dev->irq = tmp_dev->irq;
534 kref_get(&p_dev->function_config->ref);
537 /* Add to the list in pcmcia_bus_socket */
538 list_add(&p_dev->socket_device_list, &s->devices_list);
540 if (pcmcia_setup_irq(p_dev))
541 dev_warn(&p_dev->dev,
542 "IRQ setup failed -- device might not work\n");
544 if (!p_dev->function_config) {
546 dev_dbg(&p_dev->dev, "creating config_t\n");
547 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
549 mutex_unlock(&s->ops_mutex);
552 p_dev->function_config = c;
554 for (i = 0; i < MAX_IO_WIN; i++) {
555 c->io[i].name = p_dev->devname;
556 c->io[i].flags = IORESOURCE_IO;
558 for (i = 0; i< MAX_WIN; i++) {
559 c->mem[i].name = p_dev->devname;
560 c->mem[i].flags = IORESOURCE_MEM;
563 for (i = 0; i < MAX_IO_WIN; i++)
564 p_dev->resource[i] = &p_dev->function_config->io[i];
565 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
566 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
568 mutex_unlock(&s->ops_mutex);
570 dev_printk(KERN_NOTICE, &p_dev->dev,
571 "pcmcia: registering new device %s (IRQ: %d)\n",
572 p_dev->devname, p_dev->irq);
574 pcmcia_device_query(p_dev);
576 if (device_register(&p_dev->dev))
582 mutex_lock(&s->ops_mutex);
583 list_del(&p_dev->socket_device_list);
584 mutex_unlock(&s->ops_mutex);
587 mutex_lock(&s->ops_mutex);
589 mutex_unlock(&s->ops_mutex);
591 for (i = 0; i < 4; i++)
592 kfree(p_dev->prod_id[i]);
593 kfree(p_dev->devname);
596 pcmcia_put_socket(s);
602 static int pcmcia_card_add(struct pcmcia_socket *s)
604 cistpl_longlink_mfc_t mfc;
605 unsigned int no_funcs, i, no_chains;
608 mutex_lock(&s->ops_mutex);
609 if (!(s->resource_setup_done)) {
611 "no resources available, delaying card_add\n");
612 mutex_unlock(&s->ops_mutex);
613 return -EAGAIN; /* try again, but later... */
616 if (pcmcia_validate_mem(s)) {
617 dev_dbg(&s->dev, "validating mem resources failed, "
618 "delaying card_add\n");
619 mutex_unlock(&s->ops_mutex);
620 return -EAGAIN; /* try again, but later... */
622 mutex_unlock(&s->ops_mutex);
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 int pcmcia_requery_callback(struct device *dev, void * _data)
645 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
646 if (!p_dev->dev.driver) {
647 dev_dbg(dev, "update device information\n");
648 pcmcia_device_query(p_dev);
655 static void pcmcia_requery(struct pcmcia_socket *s)
659 if (s->functions == 0) {
664 /* some device information might have changed because of a CIS
665 * update or because we can finally read it correctly... so
666 * determine it again, overwriting old values if necessary. */
667 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
669 /* if the CIS changed, we need to check whether the number of
670 * functions changed. */
672 int old_funcs, new_funcs;
673 cistpl_longlink_mfc_t mfc;
675 /* does this cis override add or remove functions? */
676 old_funcs = s->functions;
678 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
683 if (old_funcs != new_funcs) {
684 /* we need to re-start */
685 pcmcia_card_remove(s, NULL);
691 /* If the PCMCIA device consists of two pseudo devices,
692 * call pcmcia_device_add() -- which will fail if both
693 * devices are already registered. */
694 mutex_lock(&s->ops_mutex);
695 has_pfc = s->pcmcia_pfc;
696 mutex_unlock(&s->ops_mutex);
698 pcmcia_device_add(s, 0);
700 /* we re-scan all devices, not just the ones connected to this
701 * socket. This does not matter, though. */
702 if (bus_rescan_devices(&pcmcia_bus_type))
703 dev_warn(&s->dev, "rescanning the bus failed\n");
707 #ifdef CONFIG_PCMCIA_LOAD_CIS
710 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
711 * @dev: the pcmcia device which needs a CIS override
712 * @filename: requested filename in /lib/firmware/
714 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
715 * the one provided by the card is broken. The firmware files reside in
716 * /lib/firmware/ in userspace.
718 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
720 struct pcmcia_socket *s = dev->socket;
721 const struct firmware *fw;
723 cistpl_longlink_mfc_t mfc;
724 int old_funcs, new_funcs = 1;
729 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
731 if (request_firmware(&fw, filename, &dev->dev) == 0) {
732 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
734 dev_printk(KERN_ERR, &dev->dev,
735 "pcmcia: CIS override is too big\n");
739 if (!pcmcia_replace_cis(s, fw->data, fw->size))
742 dev_printk(KERN_ERR, &dev->dev,
743 "pcmcia: CIS override failed\n");
747 /* we need to re-start if the number of functions changed */
748 old_funcs = s->functions;
749 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
753 if (old_funcs != new_funcs)
756 /* update information */
757 pcmcia_device_query(dev);
759 /* requery (as number of functions might have changed) */
760 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
763 release_firmware(fw);
768 #else /* !CONFIG_PCMCIA_LOAD_CIS */
770 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
778 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
779 struct pcmcia_device_id *did)
781 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
782 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
786 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
787 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
791 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
792 if (dev->func != did->function)
796 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
797 if (!dev->prod_id[0])
799 if (strcmp(did->prod_id[0], dev->prod_id[0]))
803 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
804 if (!dev->prod_id[1])
806 if (strcmp(did->prod_id[1], dev->prod_id[1]))
810 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
811 if (!dev->prod_id[2])
813 if (strcmp(did->prod_id[2], dev->prod_id[2]))
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
818 if (!dev->prod_id[3])
820 if (strcmp(did->prod_id[3], dev->prod_id[3]))
824 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
825 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
826 mutex_lock(&dev->socket->ops_mutex);
827 dev->socket->pcmcia_pfc = 1;
828 mutex_unlock(&dev->socket->ops_mutex);
829 if (dev->device_no != did->device_no)
833 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
836 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
839 /* if this is a pseudo-multi-function device,
840 * we need explicit matches */
841 if (dev->socket->pcmcia_pfc)
846 /* also, FUNC_ID matching needs to be activated by userspace
847 * after it has re-checked that there is no possible module
848 * with a prod_id/manf_id/card_id match.
850 mutex_lock(&dev->socket->ops_mutex);
851 ret = dev->allow_func_id_match;
852 mutex_unlock(&dev->socket->ops_mutex);
856 "skipping FUNC_ID match until userspace ACK\n");
861 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
862 dev_dbg(&dev->dev, "device needs a fake CIS\n");
863 if (!dev->socket->fake_cis)
864 if (pcmcia_load_firmware(dev, did->cisfile))
868 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
870 for (i = 0; i < 4; i++)
873 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
881 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
883 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
884 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
885 struct pcmcia_device_id *did = p_drv->id_table;
886 struct pcmcia_dynid *dynid;
888 /* match dynamic devices first */
889 mutex_lock(&p_drv->dynids.lock);
890 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
891 dev_dbg(dev, "trying to match to %s\n", drv->name);
892 if (pcmcia_devmatch(p_dev, &dynid->id)) {
893 dev_dbg(dev, "matched to %s\n", drv->name);
894 mutex_unlock(&p_drv->dynids.lock);
898 mutex_unlock(&p_drv->dynids.lock);
900 while (did && did->match_flags) {
901 dev_dbg(dev, "trying to match to %s\n", drv->name);
902 if (pcmcia_devmatch(p_dev, did)) {
903 dev_dbg(dev, "matched to %s\n", drv->name);
912 #ifdef CONFIG_HOTPLUG
914 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
916 struct pcmcia_device *p_dev;
918 u32 hash[4] = { 0, 0, 0, 0};
923 p_dev = to_pcmcia_dev(dev);
925 /* calculate hashes */
926 for (i = 0; i < 4; i++) {
927 if (!p_dev->prod_id[i])
929 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
932 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
935 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
938 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
939 "pa%08Xpb%08Xpc%08Xpd%08X",
940 p_dev->has_manf_id ? p_dev->manf_id : 0,
941 p_dev->has_card_id ? p_dev->card_id : 0,
942 p_dev->has_func_id ? p_dev->func_id : 0,
956 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
963 /************************ runtime PM support ***************************/
965 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
966 static int pcmcia_dev_resume(struct device *dev);
968 static int runtime_suspend(struct device *dev)
973 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
978 static int runtime_resume(struct device *dev)
983 rc = pcmcia_dev_resume(dev);
988 /************************ per-device sysfs output ***************************/
990 #define pcmcia_device_attr(field, test, format) \
991 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
993 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
994 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
997 #define pcmcia_device_stringattr(name, field) \
998 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1000 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1001 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1004 pcmcia_device_attr(func, socket, "0x%02x\n");
1005 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1006 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1007 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1008 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1009 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1010 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1011 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1013 static ssize_t pcmcia_show_resources(struct device *dev,
1014 struct device_attribute *attr, char *buf)
1016 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1020 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1021 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1026 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1028 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1030 if (p_dev->suspended)
1031 return sprintf(buf, "off\n");
1033 return sprintf(buf, "on\n");
1036 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1037 const char *buf, size_t count)
1039 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1045 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1046 ret = runtime_suspend(dev);
1047 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1048 ret = runtime_resume(dev);
1050 return ret ? ret : count;
1054 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1056 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1058 u32 hash[4] = { 0, 0, 0, 0};
1060 /* calculate hashes */
1061 for (i = 0; i < 4; i++) {
1062 if (!p_dev->prod_id[i])
1064 hash[i] = crc32(0, p_dev->prod_id[i],
1065 strlen(p_dev->prod_id[i]));
1067 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1068 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1069 p_dev->has_manf_id ? p_dev->manf_id : 0,
1070 p_dev->has_card_id ? p_dev->card_id : 0,
1071 p_dev->has_func_id ? p_dev->func_id : 0,
1072 p_dev->func, p_dev->device_no,
1073 hash[0], hash[1], hash[2], hash[3]);
1076 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1077 struct device_attribute *attr, const char *buf, size_t count)
1079 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1084 mutex_lock(&p_dev->socket->ops_mutex);
1085 p_dev->allow_func_id_match = 1;
1086 mutex_unlock(&p_dev->socket->ops_mutex);
1087 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1092 static struct device_attribute pcmcia_dev_attrs[] = {
1093 __ATTR(function, 0444, func_show, NULL),
1094 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1095 __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1099 __ATTR_RO(prod_id1),
1100 __ATTR_RO(prod_id2),
1101 __ATTR_RO(prod_id3),
1102 __ATTR_RO(prod_id4),
1103 __ATTR_RO(modalias),
1104 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1108 /* PM support, also needed for reset */
1110 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1112 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1113 struct pcmcia_driver *p_drv = NULL;
1116 mutex_lock(&p_dev->socket->ops_mutex);
1117 if (p_dev->suspended) {
1118 mutex_unlock(&p_dev->socket->ops_mutex);
1121 p_dev->suspended = 1;
1122 mutex_unlock(&p_dev->socket->ops_mutex);
1124 dev_dbg(dev, "suspending\n");
1127 p_drv = to_pcmcia_drv(dev->driver);
1132 if (p_drv->suspend) {
1133 ret = p_drv->suspend(p_dev);
1135 dev_printk(KERN_ERR, dev,
1136 "pcmcia: device %s (driver %s) did "
1137 "not want to go to sleep (%d)\n",
1138 p_dev->devname, p_drv->drv.name, ret);
1139 mutex_lock(&p_dev->socket->ops_mutex);
1140 p_dev->suspended = 0;
1141 mutex_unlock(&p_dev->socket->ops_mutex);
1146 if (p_dev->device_no == p_dev->func) {
1147 dev_dbg(dev, "releasing configuration\n");
1148 pcmcia_release_configuration(p_dev);
1156 static int pcmcia_dev_resume(struct device *dev)
1158 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1159 struct pcmcia_driver *p_drv = NULL;
1162 mutex_lock(&p_dev->socket->ops_mutex);
1163 if (!p_dev->suspended) {
1164 mutex_unlock(&p_dev->socket->ops_mutex);
1167 p_dev->suspended = 0;
1168 mutex_unlock(&p_dev->socket->ops_mutex);
1170 dev_dbg(dev, "resuming\n");
1173 p_drv = to_pcmcia_drv(dev->driver);
1178 if (p_dev->device_no == p_dev->func) {
1179 dev_dbg(dev, "requesting configuration\n");
1180 ret = pcmcia_enable_device(p_dev);
1186 ret = p_drv->resume(p_dev);
1193 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1195 struct pcmcia_socket *skt = _data;
1196 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1198 if (p_dev->socket != skt || p_dev->suspended)
1201 return runtime_suspend(dev);
1204 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1206 struct pcmcia_socket *skt = _data;
1207 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1209 if (p_dev->socket != skt || !p_dev->suspended)
1212 runtime_resume(dev);
1217 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1219 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1220 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1224 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1226 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1227 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1228 pcmcia_bus_suspend_callback)) {
1229 pcmcia_bus_resume(skt);
1235 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1237 atomic_set(&skt->present, 0);
1238 pcmcia_card_remove(skt, NULL);
1240 mutex_lock(&skt->ops_mutex);
1241 destroy_cis_cache(skt);
1242 pcmcia_cleanup_irq(skt);
1243 mutex_unlock(&skt->ops_mutex);
1248 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1250 atomic_set(&skt->present, 1);
1252 mutex_lock(&skt->ops_mutex);
1253 skt->pcmcia_pfc = 0;
1254 destroy_cis_cache(skt); /* to be on the safe side... */
1255 mutex_unlock(&skt->ops_mutex);
1257 pcmcia_card_add(skt);
1262 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1264 if (!verify_cis_cache(skt)) {
1265 pcmcia_put_socket(skt);
1269 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1271 /* first, remove the card */
1272 pcmcia_bus_remove(skt);
1274 mutex_lock(&skt->ops_mutex);
1275 destroy_cis_cache(skt);
1276 kfree(skt->fake_cis);
1277 skt->fake_cis = NULL;
1279 mutex_unlock(&skt->ops_mutex);
1281 /* now, add the new card */
1282 pcmcia_bus_add(skt);
1288 * NOTE: This is racy. There's no guarantee the card will still be
1289 * physically present, even if the call to this function returns
1290 * non-NULL. Furthermore, the device driver most likely is unbound
1291 * almost immediately, so the timeframe where pcmcia_dev_present
1292 * returns NULL is probably really really small.
1294 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1296 struct pcmcia_device *p_dev;
1297 struct pcmcia_device *ret = NULL;
1299 p_dev = pcmcia_get_dev(_p_dev);
1303 if (atomic_read(&p_dev->socket->present) != 0)
1306 pcmcia_put_dev(p_dev);
1309 EXPORT_SYMBOL(pcmcia_dev_present);
1312 static struct pcmcia_callback pcmcia_bus_callback = {
1313 .owner = THIS_MODULE,
1314 .add = pcmcia_bus_add,
1315 .remove = pcmcia_bus_remove,
1316 .requery = pcmcia_requery,
1317 .validate = pccard_validate_cis,
1318 .suspend = pcmcia_bus_suspend,
1319 .early_resume = pcmcia_bus_early_resume,
1320 .resume = pcmcia_bus_resume,
1323 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1324 struct class_interface *class_intf)
1326 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1329 socket = pcmcia_get_socket(socket);
1331 dev_printk(KERN_ERR, dev,
1332 "PCMCIA obtaining reference to socket failed\n");
1336 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1338 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1339 pcmcia_put_socket(socket);
1343 INIT_LIST_HEAD(&socket->devices_list);
1344 socket->pcmcia_pfc = 0;
1345 socket->device_count = 0;
1346 atomic_set(&socket->present, 0);
1348 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1350 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1351 pcmcia_put_socket(socket);
1358 static void pcmcia_bus_remove_socket(struct device *dev,
1359 struct class_interface *class_intf)
1361 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1366 pccard_register_pcmcia(socket, NULL);
1368 /* unregister any unbound devices */
1369 mutex_lock(&socket->skt_mutex);
1370 pcmcia_card_remove(socket, NULL);
1371 release_cis_mem(socket);
1372 mutex_unlock(&socket->skt_mutex);
1374 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1376 pcmcia_put_socket(socket);
1382 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1383 static struct class_interface pcmcia_bus_interface __refdata = {
1384 .class = &pcmcia_socket_class,
1385 .add_dev = &pcmcia_bus_add_socket,
1386 .remove_dev = &pcmcia_bus_remove_socket,
1390 struct bus_type pcmcia_bus_type = {
1392 .uevent = pcmcia_bus_uevent,
1393 .match = pcmcia_bus_match,
1394 .dev_attrs = pcmcia_dev_attrs,
1395 .probe = pcmcia_device_probe,
1396 .remove = pcmcia_device_remove,
1397 .suspend = pcmcia_dev_suspend,
1398 .resume = pcmcia_dev_resume,
1402 static int __init init_pcmcia_bus(void)
1406 ret = bus_register(&pcmcia_bus_type);
1408 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1411 ret = class_interface_register(&pcmcia_bus_interface);
1414 "pcmcia: class_interface_register error: %d\n", ret);
1415 bus_unregister(&pcmcia_bus_type);
1421 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1422 * pcmcia_socket_class is already registered */
1425 static void __exit exit_pcmcia_bus(void)
1427 class_interface_unregister(&pcmcia_bus_interface);
1429 bus_unregister(&pcmcia_bus_type);
1431 module_exit(exit_pcmcia_bus);