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 new_id_store(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_WO(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);
161 pcmcia_remove_newid_file(struct pcmcia_driver *drv)
163 driver_remove_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 driver->drv.name = driver->name;
185 mutex_init(&driver->dynids.lock);
186 INIT_LIST_HEAD(&driver->dynids.list);
188 pr_debug("registering driver %s\n", driver->name);
190 error = driver_register(&driver->drv);
194 error = pcmcia_create_newid_file(driver);
196 driver_unregister(&driver->drv);
200 EXPORT_SYMBOL(pcmcia_register_driver);
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
206 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
208 pr_debug("unregistering driver %s\n", driver->name);
209 pcmcia_remove_newid_file(driver);
210 driver_unregister(&driver->drv);
211 pcmcia_free_dynids(driver);
213 EXPORT_SYMBOL(pcmcia_unregister_driver);
216 /* pcmcia_device handling */
218 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
220 struct device *tmp_dev;
221 tmp_dev = get_device(&p_dev->dev);
224 return to_pcmcia_dev(tmp_dev);
227 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
230 put_device(&p_dev->dev);
233 static void pcmcia_release_function(struct kref *ref)
235 struct config_t *c = container_of(ref, struct config_t, ref);
236 pr_debug("releasing config_t\n");
240 static void pcmcia_release_dev(struct device *dev)
242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
244 dev_dbg(dev, "releasing device\n");
245 pcmcia_put_socket(p_dev->socket);
246 for (i = 0; i < 4; i++)
247 kfree(p_dev->prod_id[i]);
248 kfree(p_dev->devname);
249 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
254 static int pcmcia_device_probe(struct device *dev)
256 struct pcmcia_device *p_dev;
257 struct pcmcia_driver *p_drv;
258 struct pcmcia_socket *s;
259 cistpl_config_t cis_config;
262 dev = get_device(dev);
266 p_dev = to_pcmcia_dev(dev);
267 p_drv = to_pcmcia_drv(dev->driver);
270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
272 if ((!p_drv->probe) || (!p_dev->function_config) ||
273 (!try_module_get(p_drv->owner))) {
278 /* set up some more device information */
279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
282 p_dev->config_base = cis_config.base;
283 p_dev->config_regs = cis_config.rmask[0];
284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
288 "pcmcia: could not parse base and rmask0 of CIS\n");
289 p_dev->config_base = 0;
290 p_dev->config_regs = 0;
293 ret = p_drv->probe(p_dev);
295 dev_dbg(dev, "binding to %s failed with %d\n",
299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303 p_dev->resource[3], p_dev->resource[4]);
305 mutex_lock(&s->ops_mutex);
306 if ((s->pcmcia_pfc) &&
307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309 mutex_unlock(&s->ops_mutex);
313 module_put(p_drv->owner);
322 * Removes a PCMCIA card from the device tree and socket list.
324 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
326 struct pcmcia_device *p_dev;
327 struct pcmcia_device *tmp;
329 dev_dbg(leftover ? &leftover->dev : &s->dev,
330 "pcmcia_card_remove(%d) %s\n", s->sock,
331 leftover ? leftover->devname : "");
333 mutex_lock(&s->ops_mutex);
338 mutex_unlock(&s->ops_mutex);
340 /* unregister all pcmcia_devices registered with this socket, except leftover */
341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342 if (p_dev == leftover)
345 mutex_lock(&s->ops_mutex);
346 list_del(&p_dev->socket_device_list);
347 mutex_unlock(&s->ops_mutex);
349 dev_dbg(&p_dev->dev, "unregistering device\n");
350 device_unregister(&p_dev->dev);
356 static int pcmcia_device_remove(struct device *dev)
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
362 p_dev = to_pcmcia_dev(dev);
363 p_drv = to_pcmcia_drv(dev->driver);
365 dev_dbg(dev, "removing device\n");
367 /* If we're removing the primary module driving a
368 * pseudo multi-function card, we need to unbind
371 if ((p_dev->socket->pcmcia_pfc) &&
372 (p_dev->socket->device_count > 0) &&
373 (p_dev->device_no == 0))
374 pcmcia_card_remove(p_dev->socket, p_dev);
376 /* detach the "instance" */
381 p_drv->remove(p_dev);
383 /* check for proper unloading */
384 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
386 "pcmcia: driver %s did not release config properly\n",
389 for (i = 0; i < MAX_WIN; i++)
390 if (p_dev->_win & CLIENT_WIN_REQ(i))
392 "pcmcia: driver %s did not release window properly\n",
395 /* references from pcmcia_probe_device */
396 pcmcia_put_dev(p_dev);
397 module_put(p_drv->owner);
404 * pcmcia_device_query -- determine information about a pcmcia device
406 static int pcmcia_device_query(struct pcmcia_device *p_dev)
408 cistpl_manfid_t manf_id;
409 cistpl_funcid_t func_id;
410 cistpl_vers_1_t *vers1;
413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418 CISTPL_MANFID, &manf_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->manf_id = manf_id.manf;
421 p_dev->card_id = manf_id.card;
422 p_dev->has_manf_id = 1;
423 p_dev->has_card_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
427 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428 CISTPL_FUNCID, &func_id)) {
429 mutex_lock(&p_dev->socket->ops_mutex);
430 p_dev->func_id = func_id.func;
431 p_dev->has_func_id = 1;
432 mutex_unlock(&p_dev->socket->ops_mutex);
434 /* rule of thumb: cards with no FUNCID, but with
435 * common memory device geometry information, are
436 * probably memory cards (from pcmcia-cs) */
437 cistpl_device_geo_t *devgeo;
439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
444 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445 CISTPL_DEVICE_GEO, devgeo)) {
447 "mem device geometry probably means "
449 mutex_lock(&p_dev->socket->ops_mutex);
450 p_dev->func_id = CISTPL_FUNCID_MEMORY;
451 p_dev->has_func_id = 1;
452 mutex_unlock(&p_dev->socket->ops_mutex);
457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
459 mutex_lock(&p_dev->socket->ops_mutex);
460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
465 tmp = vers1->str + vers1->ofs[i];
467 length = strlen(tmp) + 1;
468 if ((length < 2) || (length > 255))
471 new = kstrdup(tmp, GFP_KERNEL);
475 tmp = p_dev->prod_id[i];
476 p_dev->prod_id[i] = new;
479 mutex_unlock(&p_dev->socket->ops_mutex);
487 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
488 unsigned int function)
490 struct pcmcia_device *p_dev, *tmp_dev;
493 s = pcmcia_get_socket(s);
497 pr_debug("adding device to %d, function %d\n", s->sock, function);
499 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
503 mutex_lock(&s->ops_mutex);
504 p_dev->device_no = (s->device_count++);
505 mutex_unlock(&s->ops_mutex);
507 /* max of 2 PFC devices */
508 if ((p_dev->device_no >= 2) && (function == 0))
511 /* max of 4 devices overall */
512 if (p_dev->device_no >= 4)
516 p_dev->func = function;
518 p_dev->dev.bus = &pcmcia_bus_type;
519 p_dev->dev.parent = s->dev.parent;
520 p_dev->dev.release = pcmcia_release_dev;
521 /* by default don't allow DMA */
522 p_dev->dma_mask = DMA_MASK_NONE;
523 p_dev->dev.dma_mask = &p_dev->dma_mask;
524 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
527 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
529 mutex_lock(&s->ops_mutex);
532 * p_dev->function_config must be the same for all card functions.
533 * Note that this is serialized by ops_mutex, so that only one
534 * such struct will be created.
536 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
537 if (p_dev->func == tmp_dev->func) {
538 p_dev->function_config = tmp_dev->function_config;
539 p_dev->irq = tmp_dev->irq;
540 kref_get(&p_dev->function_config->ref);
543 /* Add to the list in pcmcia_bus_socket */
544 list_add(&p_dev->socket_device_list, &s->devices_list);
546 if (pcmcia_setup_irq(p_dev))
547 dev_warn(&p_dev->dev,
548 "IRQ setup failed -- device might not work\n");
550 if (!p_dev->function_config) {
552 dev_dbg(&p_dev->dev, "creating config_t\n");
553 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
555 mutex_unlock(&s->ops_mutex);
558 p_dev->function_config = c;
560 for (i = 0; i < MAX_IO_WIN; i++) {
561 c->io[i].name = p_dev->devname;
562 c->io[i].flags = IORESOURCE_IO;
564 for (i = 0; i < MAX_WIN; i++) {
565 c->mem[i].name = p_dev->devname;
566 c->mem[i].flags = IORESOURCE_MEM;
569 for (i = 0; i < MAX_IO_WIN; i++)
570 p_dev->resource[i] = &p_dev->function_config->io[i];
571 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
572 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
574 mutex_unlock(&s->ops_mutex);
576 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
577 p_dev->devname, p_dev->irq);
579 pcmcia_device_query(p_dev);
581 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
582 if (device_register(&p_dev->dev)) {
583 mutex_lock(&s->ops_mutex);
584 list_del(&p_dev->socket_device_list);
586 mutex_unlock(&s->ops_mutex);
587 put_device(&p_dev->dev);
594 mutex_lock(&s->ops_mutex);
595 list_del(&p_dev->socket_device_list);
596 mutex_unlock(&s->ops_mutex);
599 mutex_lock(&s->ops_mutex);
601 mutex_unlock(&s->ops_mutex);
603 for (i = 0; i < 4; i++)
604 kfree(p_dev->prod_id[i]);
605 kfree(p_dev->devname);
608 pcmcia_put_socket(s);
614 static int pcmcia_card_add(struct pcmcia_socket *s)
616 cistpl_longlink_mfc_t mfc;
617 unsigned int no_funcs, i, no_chains;
620 mutex_lock(&s->ops_mutex);
621 if (!(s->resource_setup_done)) {
623 "no resources available, delaying card_add\n");
624 mutex_unlock(&s->ops_mutex);
625 return -EAGAIN; /* try again, but later... */
628 if (pcmcia_validate_mem(s)) {
629 dev_dbg(&s->dev, "validating mem resources failed, "
630 "delaying card_add\n");
631 mutex_unlock(&s->ops_mutex);
632 return -EAGAIN; /* try again, but later... */
634 mutex_unlock(&s->ops_mutex);
636 ret = pccard_validate_cis(s, &no_chains);
637 if (ret || !no_chains) {
638 #if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
639 /* Set up as an anonymous card. If we don't have anonymous
640 memory support then just error the card as there is no
641 point trying to second guess.
643 Note: some cards have just a device entry, it may be
644 worth extending support to cover these in future */
646 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
647 pcmcia_replace_cis(s, "\xFF", 1);
653 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
658 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
662 s->functions = no_funcs;
664 for (i = 0; i < no_funcs; i++)
665 pcmcia_device_add(s, i);
671 static int pcmcia_requery_callback(struct device *dev, void *_data)
673 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
674 if (!p_dev->dev.driver) {
675 dev_dbg(dev, "update device information\n");
676 pcmcia_device_query(p_dev);
683 static void pcmcia_requery(struct pcmcia_socket *s)
687 if (!(s->state & SOCKET_PRESENT))
690 if (s->functions == 0) {
695 /* some device information might have changed because of a CIS
696 * update or because we can finally read it correctly... so
697 * determine it again, overwriting old values if necessary. */
698 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
700 /* if the CIS changed, we need to check whether the number of
701 * functions changed. */
703 int old_funcs, new_funcs;
704 cistpl_longlink_mfc_t mfc;
706 /* does this cis override add or remove functions? */
707 old_funcs = s->functions;
709 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
714 if (old_funcs != new_funcs) {
715 /* we need to re-start */
716 pcmcia_card_remove(s, NULL);
722 /* If the PCMCIA device consists of two pseudo devices,
723 * call pcmcia_device_add() -- which will fail if both
724 * devices are already registered. */
725 mutex_lock(&s->ops_mutex);
726 has_pfc = s->pcmcia_pfc;
727 mutex_unlock(&s->ops_mutex);
729 pcmcia_device_add(s, 0);
731 /* we re-scan all devices, not just the ones connected to this
732 * socket. This does not matter, though. */
733 if (bus_rescan_devices(&pcmcia_bus_type))
734 dev_warn(&s->dev, "rescanning the bus failed\n");
738 #ifdef CONFIG_PCMCIA_LOAD_CIS
741 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
742 * @dev: the pcmcia device which needs a CIS override
743 * @filename: requested filename in /lib/firmware/
745 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
746 * the one provided by the card is broken. The firmware files reside in
747 * /lib/firmware/ in userspace.
749 static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
751 struct pcmcia_socket *s = dev->socket;
752 const struct firmware *fw;
754 cistpl_longlink_mfc_t mfc;
755 int old_funcs, new_funcs = 1;
760 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
762 if (request_firmware(&fw, filename, &dev->dev) == 0) {
763 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
765 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
769 if (!pcmcia_replace_cis(s, fw->data, fw->size))
772 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
776 /* we need to re-start if the number of functions changed */
777 old_funcs = s->functions;
778 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
782 if (old_funcs != new_funcs)
785 /* update information */
786 pcmcia_device_query(dev);
788 /* requery (as number of functions might have changed) */
789 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
792 release_firmware(fw);
797 #else /* !CONFIG_PCMCIA_LOAD_CIS */
799 static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
808 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
809 const struct pcmcia_device_id *did)
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
812 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
816 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
817 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
822 if (dev->func != did->function)
826 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
827 if (!dev->prod_id[0])
829 if (strcmp(did->prod_id[0], dev->prod_id[0]))
833 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
834 if (!dev->prod_id[1])
836 if (strcmp(did->prod_id[1], dev->prod_id[1]))
840 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
841 if (!dev->prod_id[2])
843 if (strcmp(did->prod_id[2], dev->prod_id[2]))
847 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
848 if (!dev->prod_id[3])
850 if (strcmp(did->prod_id[3], dev->prod_id[3]))
854 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
855 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
856 mutex_lock(&dev->socket->ops_mutex);
857 dev->socket->pcmcia_pfc = 1;
858 mutex_unlock(&dev->socket->ops_mutex);
859 if (dev->device_no != did->device_no)
863 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
866 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
869 /* if this is a pseudo-multi-function device,
870 * we need explicit matches */
871 if (dev->socket->pcmcia_pfc)
876 /* also, FUNC_ID matching needs to be activated by userspace
877 * after it has re-checked that there is no possible module
878 * with a prod_id/manf_id/card_id match.
880 mutex_lock(&dev->socket->ops_mutex);
881 ret = dev->allow_func_id_match;
882 mutex_unlock(&dev->socket->ops_mutex);
886 "skipping FUNC_ID match until userspace ACK\n");
891 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
892 dev_dbg(&dev->dev, "device needs a fake CIS\n");
893 if (!dev->socket->fake_cis)
894 if (pcmcia_load_firmware(dev, did->cisfile))
898 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
900 for (i = 0; i < 4; i++)
903 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
911 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
913 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
914 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
915 const struct pcmcia_device_id *did = p_drv->id_table;
916 struct pcmcia_dynid *dynid;
918 /* match dynamic devices first */
919 mutex_lock(&p_drv->dynids.lock);
920 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
921 dev_dbg(dev, "trying to match to %s\n", drv->name);
922 if (pcmcia_devmatch(p_dev, &dynid->id)) {
923 dev_dbg(dev, "matched to %s\n", drv->name);
924 mutex_unlock(&p_drv->dynids.lock);
928 mutex_unlock(&p_drv->dynids.lock);
930 while (did && did->match_flags) {
931 dev_dbg(dev, "trying to match to %s\n", drv->name);
932 if (pcmcia_devmatch(p_dev, did)) {
933 dev_dbg(dev, "matched to %s\n", drv->name);
942 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
944 struct pcmcia_device *p_dev;
946 u32 hash[4] = { 0, 0, 0, 0};
951 p_dev = to_pcmcia_dev(dev);
953 /* calculate hashes */
954 for (i = 0; i < 4; i++) {
955 if (!p_dev->prod_id[i])
957 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
960 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
963 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
966 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
967 "pa%08Xpb%08Xpc%08Xpd%08X",
968 p_dev->has_manf_id ? p_dev->manf_id : 0,
969 p_dev->has_card_id ? p_dev->card_id : 0,
970 p_dev->has_func_id ? p_dev->func_id : 0,
982 /************************ runtime PM support ***************************/
984 static int pcmcia_dev_suspend(struct device *dev);
985 static int pcmcia_dev_resume(struct device *dev);
987 static int runtime_suspend(struct device *dev)
992 rc = pcmcia_dev_suspend(dev);
997 static int runtime_resume(struct device *dev)
1002 rc = pcmcia_dev_resume(dev);
1007 /************************ per-device sysfs output ***************************/
1009 #define pcmcia_device_attr(field, test, format) \
1010 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1012 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1013 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1015 static DEVICE_ATTR_RO(field);
1017 #define pcmcia_device_stringattr(name, field) \
1018 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1020 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1021 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1023 static DEVICE_ATTR_RO(name);
1025 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1026 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1027 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1028 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1029 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1030 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1031 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1033 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1039 static DEVICE_ATTR_RO(function);
1041 static ssize_t resources_show(struct device *dev,
1042 struct device_attribute *attr, char *buf)
1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1049 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1053 static DEVICE_ATTR_RO(resources);
1055 static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1057 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1059 if (p_dev->suspended)
1060 return sprintf(buf, "off\n");
1062 return sprintf(buf, "on\n");
1065 static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1066 const char *buf, size_t count)
1068 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1074 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1075 ret = runtime_suspend(dev);
1076 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1077 ret = runtime_resume(dev);
1079 return ret ? ret : count;
1081 static DEVICE_ATTR_RW(pm_state);
1083 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1085 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1087 u32 hash[4] = { 0, 0, 0, 0};
1089 /* calculate hashes */
1090 for (i = 0; i < 4; i++) {
1091 if (!p_dev->prod_id[i])
1093 hash[i] = crc32(0, p_dev->prod_id[i],
1094 strlen(p_dev->prod_id[i]));
1096 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1097 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1098 p_dev->has_manf_id ? p_dev->manf_id : 0,
1099 p_dev->has_card_id ? p_dev->card_id : 0,
1100 p_dev->has_func_id ? p_dev->func_id : 0,
1101 p_dev->func, p_dev->device_no,
1102 hash[0], hash[1], hash[2], hash[3]);
1104 static DEVICE_ATTR_RO(modalias);
1106 static ssize_t allow_func_id_match_store(struct device *dev,
1107 struct device_attribute *attr, const char *buf, size_t count)
1109 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1114 mutex_lock(&p_dev->socket->ops_mutex);
1115 p_dev->allow_func_id_match = 1;
1116 mutex_unlock(&p_dev->socket->ops_mutex);
1117 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1121 static DEVICE_ATTR_WO(allow_func_id_match);
1123 static struct attribute *pcmcia_dev_attrs[] = {
1124 &dev_attr_resources.attr,
1125 &dev_attr_pm_state.attr,
1126 &dev_attr_function.attr,
1127 &dev_attr_func_id.attr,
1128 &dev_attr_manf_id.attr,
1129 &dev_attr_card_id.attr,
1130 &dev_attr_prod_id1.attr,
1131 &dev_attr_prod_id2.attr,
1132 &dev_attr_prod_id3.attr,
1133 &dev_attr_prod_id4.attr,
1134 &dev_attr_modalias.attr,
1135 &dev_attr_allow_func_id_match.attr,
1138 ATTRIBUTE_GROUPS(pcmcia_dev);
1140 /* PM support, also needed for reset */
1142 static int pcmcia_dev_suspend(struct device *dev)
1144 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1145 struct pcmcia_driver *p_drv = NULL;
1148 mutex_lock(&p_dev->socket->ops_mutex);
1149 if (p_dev->suspended) {
1150 mutex_unlock(&p_dev->socket->ops_mutex);
1153 p_dev->suspended = 1;
1154 mutex_unlock(&p_dev->socket->ops_mutex);
1156 dev_dbg(dev, "suspending\n");
1159 p_drv = to_pcmcia_drv(dev->driver);
1164 if (p_drv->suspend) {
1165 ret = p_drv->suspend(p_dev);
1168 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1169 p_dev->devname, p_drv->name, ret);
1170 mutex_lock(&p_dev->socket->ops_mutex);
1171 p_dev->suspended = 0;
1172 mutex_unlock(&p_dev->socket->ops_mutex);
1177 if (p_dev->device_no == p_dev->func) {
1178 dev_dbg(dev, "releasing configuration\n");
1179 pcmcia_release_configuration(p_dev);
1187 static int pcmcia_dev_resume(struct device *dev)
1189 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1190 struct pcmcia_driver *p_drv = NULL;
1193 mutex_lock(&p_dev->socket->ops_mutex);
1194 if (!p_dev->suspended) {
1195 mutex_unlock(&p_dev->socket->ops_mutex);
1198 p_dev->suspended = 0;
1199 mutex_unlock(&p_dev->socket->ops_mutex);
1201 dev_dbg(dev, "resuming\n");
1204 p_drv = to_pcmcia_drv(dev->driver);
1209 if (p_dev->device_no == p_dev->func) {
1210 dev_dbg(dev, "requesting configuration\n");
1211 ret = pcmcia_enable_device(p_dev);
1217 ret = p_drv->resume(p_dev);
1224 static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1226 struct pcmcia_socket *skt = _data;
1227 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1229 if (p_dev->socket != skt || p_dev->suspended)
1232 return runtime_suspend(dev);
1235 static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1237 struct pcmcia_socket *skt = _data;
1238 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1240 if (p_dev->socket != skt || !p_dev->suspended)
1243 runtime_resume(dev);
1248 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1250 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1251 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1255 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1257 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1258 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1259 pcmcia_bus_suspend_callback)) {
1260 pcmcia_bus_resume(skt);
1266 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1268 atomic_set(&skt->present, 0);
1269 pcmcia_card_remove(skt, NULL);
1271 mutex_lock(&skt->ops_mutex);
1272 destroy_cis_cache(skt);
1273 pcmcia_cleanup_irq(skt);
1274 mutex_unlock(&skt->ops_mutex);
1279 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1281 atomic_set(&skt->present, 1);
1283 mutex_lock(&skt->ops_mutex);
1284 skt->pcmcia_pfc = 0;
1285 destroy_cis_cache(skt); /* to be on the safe side... */
1286 mutex_unlock(&skt->ops_mutex);
1288 pcmcia_card_add(skt);
1293 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1295 if (!verify_cis_cache(skt))
1298 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1300 /* first, remove the card */
1301 pcmcia_bus_remove(skt);
1303 mutex_lock(&skt->ops_mutex);
1304 destroy_cis_cache(skt);
1305 kfree(skt->fake_cis);
1306 skt->fake_cis = NULL;
1308 mutex_unlock(&skt->ops_mutex);
1310 /* now, add the new card */
1311 pcmcia_bus_add(skt);
1317 * NOTE: This is racy. There's no guarantee the card will still be
1318 * physically present, even if the call to this function returns
1319 * non-NULL. Furthermore, the device driver most likely is unbound
1320 * almost immediately, so the timeframe where pcmcia_dev_present
1321 * returns NULL is probably really really small.
1323 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1325 struct pcmcia_device *p_dev;
1326 struct pcmcia_device *ret = NULL;
1328 p_dev = pcmcia_get_dev(_p_dev);
1332 if (atomic_read(&p_dev->socket->present) != 0)
1335 pcmcia_put_dev(p_dev);
1338 EXPORT_SYMBOL(pcmcia_dev_present);
1341 static struct pcmcia_callback pcmcia_bus_callback = {
1342 .owner = THIS_MODULE,
1343 .add = pcmcia_bus_add,
1344 .remove = pcmcia_bus_remove,
1345 .requery = pcmcia_requery,
1346 .validate = pccard_validate_cis,
1347 .suspend = pcmcia_bus_suspend,
1348 .early_resume = pcmcia_bus_early_resume,
1349 .resume = pcmcia_bus_resume,
1352 static int pcmcia_bus_add_socket(struct device *dev,
1353 struct class_interface *class_intf)
1355 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1358 socket = pcmcia_get_socket(socket);
1360 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1364 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1366 dev_err(dev, "PCMCIA registration failed\n");
1367 pcmcia_put_socket(socket);
1371 INIT_LIST_HEAD(&socket->devices_list);
1372 socket->pcmcia_pfc = 0;
1373 socket->device_count = 0;
1374 atomic_set(&socket->present, 0);
1376 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1378 dev_err(dev, "PCMCIA registration failed\n");
1379 pcmcia_put_socket(socket);
1386 static void pcmcia_bus_remove_socket(struct device *dev,
1387 struct class_interface *class_intf)
1389 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1394 pccard_register_pcmcia(socket, NULL);
1396 /* unregister any unbound devices */
1397 mutex_lock(&socket->skt_mutex);
1398 pcmcia_card_remove(socket, NULL);
1399 release_cis_mem(socket);
1400 mutex_unlock(&socket->skt_mutex);
1402 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1404 pcmcia_put_socket(socket);
1410 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1411 static struct class_interface pcmcia_bus_interface __refdata = {
1412 .class = &pcmcia_socket_class,
1413 .add_dev = &pcmcia_bus_add_socket,
1414 .remove_dev = &pcmcia_bus_remove_socket,
1417 static const struct dev_pm_ops pcmcia_bus_pm_ops = {
1418 SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume)
1421 struct bus_type pcmcia_bus_type = {
1423 .uevent = pcmcia_bus_uevent,
1424 .match = pcmcia_bus_match,
1425 .dev_groups = pcmcia_dev_groups,
1426 .probe = pcmcia_device_probe,
1427 .remove = pcmcia_device_remove,
1428 .pm = &pcmcia_bus_pm_ops,
1432 static int __init init_pcmcia_bus(void)
1436 ret = bus_register(&pcmcia_bus_type);
1438 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1441 ret = class_interface_register(&pcmcia_bus_interface);
1444 "pcmcia: class_interface_register error: %d\n", ret);
1445 bus_unregister(&pcmcia_bus_type);
1451 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1452 * pcmcia_socket_class is already registered */
1455 static void __exit exit_pcmcia_bus(void)
1457 class_interface_unregister(&pcmcia_bus_interface);
1459 bus_unregister(&pcmcia_bus_type);
1461 module_exit(exit_pcmcia_bus);