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);
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 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
525 if (!dev_name(&p_dev->dev))
527 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
530 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
532 mutex_lock(&s->ops_mutex);
535 * p_dev->function_config must be the same for all card functions.
536 * Note that this is serialized by ops_mutex, so that only one
537 * such struct will be created.
539 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
540 if (p_dev->func == tmp_dev->func) {
541 p_dev->function_config = tmp_dev->function_config;
542 p_dev->irq = tmp_dev->irq;
543 kref_get(&p_dev->function_config->ref);
546 /* Add to the list in pcmcia_bus_socket */
547 list_add(&p_dev->socket_device_list, &s->devices_list);
549 if (pcmcia_setup_irq(p_dev))
550 dev_warn(&p_dev->dev,
551 "IRQ setup failed -- device might not work\n");
553 if (!p_dev->function_config) {
555 dev_dbg(&p_dev->dev, "creating config_t\n");
556 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
558 mutex_unlock(&s->ops_mutex);
561 p_dev->function_config = c;
563 for (i = 0; i < MAX_IO_WIN; i++) {
564 c->io[i].name = p_dev->devname;
565 c->io[i].flags = IORESOURCE_IO;
567 for (i = 0; i < MAX_WIN; i++) {
568 c->mem[i].name = p_dev->devname;
569 c->mem[i].flags = IORESOURCE_MEM;
572 for (i = 0; i < MAX_IO_WIN; i++)
573 p_dev->resource[i] = &p_dev->function_config->io[i];
574 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
575 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
577 mutex_unlock(&s->ops_mutex);
579 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
580 p_dev->devname, p_dev->irq);
582 pcmcia_device_query(p_dev);
584 if (device_register(&p_dev->dev))
590 mutex_lock(&s->ops_mutex);
591 list_del(&p_dev->socket_device_list);
592 mutex_unlock(&s->ops_mutex);
595 mutex_lock(&s->ops_mutex);
597 mutex_unlock(&s->ops_mutex);
599 for (i = 0; i < 4; i++)
600 kfree(p_dev->prod_id[i]);
601 kfree(p_dev->devname);
604 pcmcia_put_socket(s);
610 static int pcmcia_card_add(struct pcmcia_socket *s)
612 cistpl_longlink_mfc_t mfc;
613 unsigned int no_funcs, i, no_chains;
616 mutex_lock(&s->ops_mutex);
617 if (!(s->resource_setup_done)) {
619 "no resources available, delaying card_add\n");
620 mutex_unlock(&s->ops_mutex);
621 return -EAGAIN; /* try again, but later... */
624 if (pcmcia_validate_mem(s)) {
625 dev_dbg(&s->dev, "validating mem resources failed, "
626 "delaying card_add\n");
627 mutex_unlock(&s->ops_mutex);
628 return -EAGAIN; /* try again, but later... */
630 mutex_unlock(&s->ops_mutex);
632 ret = pccard_validate_cis(s, &no_chains);
633 if (ret || !no_chains) {
634 #if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
635 /* Set up as an anonymous card. If we don't have anonymous
636 memory support then just error the card as there is no
637 point trying to second guess.
639 Note: some cards have just a device entry, it may be
640 worth extending support to cover these in future */
642 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
643 pcmcia_replace_cis(s, "\xFF", 1);
649 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
654 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
658 s->functions = no_funcs;
660 for (i = 0; i < no_funcs; i++)
661 pcmcia_device_add(s, i);
667 static int pcmcia_requery_callback(struct device *dev, void *_data)
669 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
670 if (!p_dev->dev.driver) {
671 dev_dbg(dev, "update device information\n");
672 pcmcia_device_query(p_dev);
679 static void pcmcia_requery(struct pcmcia_socket *s)
683 if (!(s->state & SOCKET_PRESENT))
686 if (s->functions == 0) {
691 /* some device information might have changed because of a CIS
692 * update or because we can finally read it correctly... so
693 * determine it again, overwriting old values if necessary. */
694 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
696 /* if the CIS changed, we need to check whether the number of
697 * functions changed. */
699 int old_funcs, new_funcs;
700 cistpl_longlink_mfc_t mfc;
702 /* does this cis override add or remove functions? */
703 old_funcs = s->functions;
705 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
710 if (old_funcs != new_funcs) {
711 /* we need to re-start */
712 pcmcia_card_remove(s, NULL);
718 /* If the PCMCIA device consists of two pseudo devices,
719 * call pcmcia_device_add() -- which will fail if both
720 * devices are already registered. */
721 mutex_lock(&s->ops_mutex);
722 has_pfc = s->pcmcia_pfc;
723 mutex_unlock(&s->ops_mutex);
725 pcmcia_device_add(s, 0);
727 /* we re-scan all devices, not just the ones connected to this
728 * socket. This does not matter, though. */
729 if (bus_rescan_devices(&pcmcia_bus_type))
730 dev_warn(&s->dev, "rescanning the bus failed\n");
734 #ifdef CONFIG_PCMCIA_LOAD_CIS
737 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
738 * @dev: the pcmcia device which needs a CIS override
739 * @filename: requested filename in /lib/firmware/
741 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
742 * the one provided by the card is broken. The firmware files reside in
743 * /lib/firmware/ in userspace.
745 static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
747 struct pcmcia_socket *s = dev->socket;
748 const struct firmware *fw;
750 cistpl_longlink_mfc_t mfc;
751 int old_funcs, new_funcs = 1;
756 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
758 if (request_firmware(&fw, filename, &dev->dev) == 0) {
759 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
761 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
765 if (!pcmcia_replace_cis(s, fw->data, fw->size))
768 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
772 /* we need to re-start if the number of functions changed */
773 old_funcs = s->functions;
774 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
778 if (old_funcs != new_funcs)
781 /* update information */
782 pcmcia_device_query(dev);
784 /* requery (as number of functions might have changed) */
785 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
788 release_firmware(fw);
793 #else /* !CONFIG_PCMCIA_LOAD_CIS */
795 static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
804 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
805 const struct pcmcia_device_id *did)
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
808 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
812 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
813 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
818 if (dev->func != did->function)
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
823 if (!dev->prod_id[0])
825 if (strcmp(did->prod_id[0], dev->prod_id[0]))
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
830 if (!dev->prod_id[1])
832 if (strcmp(did->prod_id[1], dev->prod_id[1]))
836 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
837 if (!dev->prod_id[2])
839 if (strcmp(did->prod_id[2], dev->prod_id[2]))
843 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
844 if (!dev->prod_id[3])
846 if (strcmp(did->prod_id[3], dev->prod_id[3]))
850 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
851 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
852 mutex_lock(&dev->socket->ops_mutex);
853 dev->socket->pcmcia_pfc = 1;
854 mutex_unlock(&dev->socket->ops_mutex);
855 if (dev->device_no != did->device_no)
859 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
862 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
865 /* if this is a pseudo-multi-function device,
866 * we need explicit matches */
867 if (dev->socket->pcmcia_pfc)
872 /* also, FUNC_ID matching needs to be activated by userspace
873 * after it has re-checked that there is no possible module
874 * with a prod_id/manf_id/card_id match.
876 mutex_lock(&dev->socket->ops_mutex);
877 ret = dev->allow_func_id_match;
878 mutex_unlock(&dev->socket->ops_mutex);
882 "skipping FUNC_ID match until userspace ACK\n");
887 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
888 dev_dbg(&dev->dev, "device needs a fake CIS\n");
889 if (!dev->socket->fake_cis)
890 if (pcmcia_load_firmware(dev, did->cisfile))
894 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
896 for (i = 0; i < 4; i++)
899 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
907 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
909 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
910 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
911 const struct pcmcia_device_id *did = p_drv->id_table;
912 struct pcmcia_dynid *dynid;
914 /* match dynamic devices first */
915 mutex_lock(&p_drv->dynids.lock);
916 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
917 dev_dbg(dev, "trying to match to %s\n", drv->name);
918 if (pcmcia_devmatch(p_dev, &dynid->id)) {
919 dev_dbg(dev, "matched to %s\n", drv->name);
920 mutex_unlock(&p_drv->dynids.lock);
924 mutex_unlock(&p_drv->dynids.lock);
926 while (did && did->match_flags) {
927 dev_dbg(dev, "trying to match to %s\n", drv->name);
928 if (pcmcia_devmatch(p_dev, did)) {
929 dev_dbg(dev, "matched to %s\n", drv->name);
938 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
940 struct pcmcia_device *p_dev;
942 u32 hash[4] = { 0, 0, 0, 0};
947 p_dev = to_pcmcia_dev(dev);
949 /* calculate hashes */
950 for (i = 0; i < 4; i++) {
951 if (!p_dev->prod_id[i])
953 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
956 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
959 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
962 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
963 "pa%08Xpb%08Xpc%08Xpd%08X",
964 p_dev->has_manf_id ? p_dev->manf_id : 0,
965 p_dev->has_card_id ? p_dev->card_id : 0,
966 p_dev->has_func_id ? p_dev->func_id : 0,
978 /************************ runtime PM support ***************************/
980 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
981 static int pcmcia_dev_resume(struct device *dev);
983 static int runtime_suspend(struct device *dev)
988 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
993 static int runtime_resume(struct device *dev)
998 rc = pcmcia_dev_resume(dev);
1003 /************************ per-device sysfs output ***************************/
1005 #define pcmcia_device_attr(field, test, format) \
1006 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1008 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1009 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1011 static DEVICE_ATTR_RO(field);
1013 #define pcmcia_device_stringattr(name, field) \
1014 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1016 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1017 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1019 static DEVICE_ATTR_RO(name);
1021 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1022 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1023 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1024 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1025 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1026 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1027 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1029 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1035 static DEVICE_ATTR_RO(function);
1037 static ssize_t resources_show(struct device *dev,
1038 struct device_attribute *attr, char *buf)
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1044 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1045 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1049 static DEVICE_ATTR_RO(resources);
1051 static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1053 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1055 if (p_dev->suspended)
1056 return sprintf(buf, "off\n");
1058 return sprintf(buf, "on\n");
1061 static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1062 const char *buf, size_t count)
1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1070 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1071 ret = runtime_suspend(dev);
1072 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1073 ret = runtime_resume(dev);
1075 return ret ? ret : count;
1077 static DEVICE_ATTR_RW(pm_state);
1079 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1081 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1083 u32 hash[4] = { 0, 0, 0, 0};
1085 /* calculate hashes */
1086 for (i = 0; i < 4; i++) {
1087 if (!p_dev->prod_id[i])
1089 hash[i] = crc32(0, p_dev->prod_id[i],
1090 strlen(p_dev->prod_id[i]));
1092 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1093 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1094 p_dev->has_manf_id ? p_dev->manf_id : 0,
1095 p_dev->has_card_id ? p_dev->card_id : 0,
1096 p_dev->has_func_id ? p_dev->func_id : 0,
1097 p_dev->func, p_dev->device_no,
1098 hash[0], hash[1], hash[2], hash[3]);
1100 static DEVICE_ATTR_RO(modalias);
1102 static ssize_t allow_func_id_match_store(struct device *dev,
1103 struct device_attribute *attr, const char *buf, size_t count)
1105 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1110 mutex_lock(&p_dev->socket->ops_mutex);
1111 p_dev->allow_func_id_match = 1;
1112 mutex_unlock(&p_dev->socket->ops_mutex);
1113 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1117 static DEVICE_ATTR_WO(allow_func_id_match);
1119 static struct attribute *pcmcia_dev_attrs[] = {
1120 &dev_attr_resources.attr,
1121 &dev_attr_pm_state.attr,
1122 &dev_attr_function.attr,
1123 &dev_attr_func_id.attr,
1124 &dev_attr_manf_id.attr,
1125 &dev_attr_card_id.attr,
1126 &dev_attr_prod_id1.attr,
1127 &dev_attr_prod_id2.attr,
1128 &dev_attr_prod_id3.attr,
1129 &dev_attr_prod_id4.attr,
1130 &dev_attr_modalias.attr,
1131 &dev_attr_allow_func_id_match.attr,
1134 ATTRIBUTE_GROUPS(pcmcia_dev);
1136 /* PM support, also needed for reset */
1138 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1140 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1141 struct pcmcia_driver *p_drv = NULL;
1144 mutex_lock(&p_dev->socket->ops_mutex);
1145 if (p_dev->suspended) {
1146 mutex_unlock(&p_dev->socket->ops_mutex);
1149 p_dev->suspended = 1;
1150 mutex_unlock(&p_dev->socket->ops_mutex);
1152 dev_dbg(dev, "suspending\n");
1155 p_drv = to_pcmcia_drv(dev->driver);
1160 if (p_drv->suspend) {
1161 ret = p_drv->suspend(p_dev);
1164 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1165 p_dev->devname, p_drv->name, ret);
1166 mutex_lock(&p_dev->socket->ops_mutex);
1167 p_dev->suspended = 0;
1168 mutex_unlock(&p_dev->socket->ops_mutex);
1173 if (p_dev->device_no == p_dev->func) {
1174 dev_dbg(dev, "releasing configuration\n");
1175 pcmcia_release_configuration(p_dev);
1183 static int pcmcia_dev_resume(struct device *dev)
1185 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1186 struct pcmcia_driver *p_drv = NULL;
1189 mutex_lock(&p_dev->socket->ops_mutex);
1190 if (!p_dev->suspended) {
1191 mutex_unlock(&p_dev->socket->ops_mutex);
1194 p_dev->suspended = 0;
1195 mutex_unlock(&p_dev->socket->ops_mutex);
1197 dev_dbg(dev, "resuming\n");
1200 p_drv = to_pcmcia_drv(dev->driver);
1205 if (p_dev->device_no == p_dev->func) {
1206 dev_dbg(dev, "requesting configuration\n");
1207 ret = pcmcia_enable_device(p_dev);
1213 ret = p_drv->resume(p_dev);
1220 static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1222 struct pcmcia_socket *skt = _data;
1223 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1225 if (p_dev->socket != skt || p_dev->suspended)
1228 return runtime_suspend(dev);
1231 static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1233 struct pcmcia_socket *skt = _data;
1234 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1236 if (p_dev->socket != skt || !p_dev->suspended)
1239 runtime_resume(dev);
1244 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1246 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1247 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1251 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1253 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1254 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1255 pcmcia_bus_suspend_callback)) {
1256 pcmcia_bus_resume(skt);
1262 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1264 atomic_set(&skt->present, 0);
1265 pcmcia_card_remove(skt, NULL);
1267 mutex_lock(&skt->ops_mutex);
1268 destroy_cis_cache(skt);
1269 pcmcia_cleanup_irq(skt);
1270 mutex_unlock(&skt->ops_mutex);
1275 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1277 atomic_set(&skt->present, 1);
1279 mutex_lock(&skt->ops_mutex);
1280 skt->pcmcia_pfc = 0;
1281 destroy_cis_cache(skt); /* to be on the safe side... */
1282 mutex_unlock(&skt->ops_mutex);
1284 pcmcia_card_add(skt);
1289 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1291 if (!verify_cis_cache(skt))
1294 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1296 /* first, remove the card */
1297 pcmcia_bus_remove(skt);
1299 mutex_lock(&skt->ops_mutex);
1300 destroy_cis_cache(skt);
1301 kfree(skt->fake_cis);
1302 skt->fake_cis = NULL;
1304 mutex_unlock(&skt->ops_mutex);
1306 /* now, add the new card */
1307 pcmcia_bus_add(skt);
1313 * NOTE: This is racy. There's no guarantee the card will still be
1314 * physically present, even if the call to this function returns
1315 * non-NULL. Furthermore, the device driver most likely is unbound
1316 * almost immediately, so the timeframe where pcmcia_dev_present
1317 * returns NULL is probably really really small.
1319 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1321 struct pcmcia_device *p_dev;
1322 struct pcmcia_device *ret = NULL;
1324 p_dev = pcmcia_get_dev(_p_dev);
1328 if (atomic_read(&p_dev->socket->present) != 0)
1331 pcmcia_put_dev(p_dev);
1334 EXPORT_SYMBOL(pcmcia_dev_present);
1337 static struct pcmcia_callback pcmcia_bus_callback = {
1338 .owner = THIS_MODULE,
1339 .add = pcmcia_bus_add,
1340 .remove = pcmcia_bus_remove,
1341 .requery = pcmcia_requery,
1342 .validate = pccard_validate_cis,
1343 .suspend = pcmcia_bus_suspend,
1344 .early_resume = pcmcia_bus_early_resume,
1345 .resume = pcmcia_bus_resume,
1348 static int pcmcia_bus_add_socket(struct device *dev,
1349 struct class_interface *class_intf)
1351 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1354 socket = pcmcia_get_socket(socket);
1356 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1360 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1362 dev_err(dev, "PCMCIA registration failed\n");
1363 pcmcia_put_socket(socket);
1367 INIT_LIST_HEAD(&socket->devices_list);
1368 socket->pcmcia_pfc = 0;
1369 socket->device_count = 0;
1370 atomic_set(&socket->present, 0);
1372 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1374 dev_err(dev, "PCMCIA registration failed\n");
1375 pcmcia_put_socket(socket);
1382 static void pcmcia_bus_remove_socket(struct device *dev,
1383 struct class_interface *class_intf)
1385 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1390 pccard_register_pcmcia(socket, NULL);
1392 /* unregister any unbound devices */
1393 mutex_lock(&socket->skt_mutex);
1394 pcmcia_card_remove(socket, NULL);
1395 release_cis_mem(socket);
1396 mutex_unlock(&socket->skt_mutex);
1398 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1400 pcmcia_put_socket(socket);
1406 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1407 static struct class_interface pcmcia_bus_interface __refdata = {
1408 .class = &pcmcia_socket_class,
1409 .add_dev = &pcmcia_bus_add_socket,
1410 .remove_dev = &pcmcia_bus_remove_socket,
1414 struct bus_type pcmcia_bus_type = {
1416 .uevent = pcmcia_bus_uevent,
1417 .match = pcmcia_bus_match,
1418 .dev_groups = pcmcia_dev_groups,
1419 .probe = pcmcia_device_probe,
1420 .remove = pcmcia_device_remove,
1421 .suspend = pcmcia_dev_suspend,
1422 .resume = pcmcia_dev_resume,
1426 static int __init init_pcmcia_bus(void)
1430 ret = bus_register(&pcmcia_bus_type);
1432 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1435 ret = class_interface_register(&pcmcia_bus_interface);
1438 "pcmcia: class_interface_register error: %d\n", ret);
1439 bus_unregister(&pcmcia_bus_type);
1445 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1446 * pcmcia_socket_class is already registered */
1449 static void __exit exit_pcmcia_bus(void)
1451 class_interface_unregister(&pcmcia_bus_interface);
1453 bus_unregister(&pcmcia_bus_type);
1455 module_exit(exit_pcmcia_bus);