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 = kmalloc(sizeof(char) * length, GFP_KERNEL);
475 new = strncpy(new, tmp, length);
477 tmp = p_dev->prod_id[i];
478 p_dev->prod_id[i] = new;
481 mutex_unlock(&p_dev->socket->ops_mutex);
489 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
490 unsigned int function)
492 struct pcmcia_device *p_dev, *tmp_dev;
495 s = pcmcia_get_socket(s);
499 pr_debug("adding device to %d, function %d\n", s->sock, function);
501 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
505 mutex_lock(&s->ops_mutex);
506 p_dev->device_no = (s->device_count++);
507 mutex_unlock(&s->ops_mutex);
509 /* max of 2 PFC devices */
510 if ((p_dev->device_no >= 2) && (function == 0))
513 /* max of 4 devices overall */
514 if (p_dev->device_no >= 4)
518 p_dev->func = function;
520 p_dev->dev.bus = &pcmcia_bus_type;
521 p_dev->dev.parent = s->dev.parent;
522 p_dev->dev.release = pcmcia_release_dev;
523 /* by default don't allow DMA */
524 p_dev->dma_mask = DMA_MASK_NONE;
525 p_dev->dev.dma_mask = &p_dev->dma_mask;
526 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
527 if (!dev_name(&p_dev->dev))
529 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
532 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
534 mutex_lock(&s->ops_mutex);
537 * p_dev->function_config must be the same for all card functions.
538 * Note that this is serialized by ops_mutex, so that only one
539 * such struct will be created.
541 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
542 if (p_dev->func == tmp_dev->func) {
543 p_dev->function_config = tmp_dev->function_config;
544 p_dev->irq = tmp_dev->irq;
545 kref_get(&p_dev->function_config->ref);
548 /* Add to the list in pcmcia_bus_socket */
549 list_add(&p_dev->socket_device_list, &s->devices_list);
551 if (pcmcia_setup_irq(p_dev))
552 dev_warn(&p_dev->dev,
553 "IRQ setup failed -- device might not work\n");
555 if (!p_dev->function_config) {
557 dev_dbg(&p_dev->dev, "creating config_t\n");
558 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
560 mutex_unlock(&s->ops_mutex);
563 p_dev->function_config = c;
565 for (i = 0; i < MAX_IO_WIN; i++) {
566 c->io[i].name = p_dev->devname;
567 c->io[i].flags = IORESOURCE_IO;
569 for (i = 0; i < MAX_WIN; i++) {
570 c->mem[i].name = p_dev->devname;
571 c->mem[i].flags = IORESOURCE_MEM;
574 for (i = 0; i < MAX_IO_WIN; i++)
575 p_dev->resource[i] = &p_dev->function_config->io[i];
576 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
577 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
579 mutex_unlock(&s->ops_mutex);
581 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
582 p_dev->devname, p_dev->irq);
584 pcmcia_device_query(p_dev);
586 if (device_register(&p_dev->dev))
592 mutex_lock(&s->ops_mutex);
593 list_del(&p_dev->socket_device_list);
594 mutex_unlock(&s->ops_mutex);
597 mutex_lock(&s->ops_mutex);
599 mutex_unlock(&s->ops_mutex);
601 for (i = 0; i < 4; i++)
602 kfree(p_dev->prod_id[i]);
603 kfree(p_dev->devname);
606 pcmcia_put_socket(s);
612 static int pcmcia_card_add(struct pcmcia_socket *s)
614 cistpl_longlink_mfc_t mfc;
615 unsigned int no_funcs, i, no_chains;
618 mutex_lock(&s->ops_mutex);
619 if (!(s->resource_setup_done)) {
621 "no resources available, delaying card_add\n");
622 mutex_unlock(&s->ops_mutex);
623 return -EAGAIN; /* try again, but later... */
626 if (pcmcia_validate_mem(s)) {
627 dev_dbg(&s->dev, "validating mem resources failed, "
628 "delaying card_add\n");
629 mutex_unlock(&s->ops_mutex);
630 return -EAGAIN; /* try again, but later... */
632 mutex_unlock(&s->ops_mutex);
634 ret = pccard_validate_cis(s, &no_chains);
635 if (ret || !no_chains) {
636 #if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
637 /* Set up as an anonymous card. If we don't have anonymous
638 memory support then just error the card as there is no
639 point trying to second guess.
641 Note: some cards have just a device entry, it may be
642 worth extending support to cover these in future */
644 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
645 pcmcia_replace_cis(s, "\xFF", 1);
651 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
656 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
660 s->functions = no_funcs;
662 for (i = 0; i < no_funcs; i++)
663 pcmcia_device_add(s, i);
669 static int pcmcia_requery_callback(struct device *dev, void *_data)
671 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
672 if (!p_dev->dev.driver) {
673 dev_dbg(dev, "update device information\n");
674 pcmcia_device_query(p_dev);
681 static void pcmcia_requery(struct pcmcia_socket *s)
685 if (!(s->state & SOCKET_PRESENT))
688 if (s->functions == 0) {
693 /* some device information might have changed because of a CIS
694 * update or because we can finally read it correctly... so
695 * determine it again, overwriting old values if necessary. */
696 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
698 /* if the CIS changed, we need to check whether the number of
699 * functions changed. */
701 int old_funcs, new_funcs;
702 cistpl_longlink_mfc_t mfc;
704 /* does this cis override add or remove functions? */
705 old_funcs = s->functions;
707 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
712 if (old_funcs != new_funcs) {
713 /* we need to re-start */
714 pcmcia_card_remove(s, NULL);
720 /* If the PCMCIA device consists of two pseudo devices,
721 * call pcmcia_device_add() -- which will fail if both
722 * devices are already registered. */
723 mutex_lock(&s->ops_mutex);
724 has_pfc = s->pcmcia_pfc;
725 mutex_unlock(&s->ops_mutex);
727 pcmcia_device_add(s, 0);
729 /* we re-scan all devices, not just the ones connected to this
730 * socket. This does not matter, though. */
731 if (bus_rescan_devices(&pcmcia_bus_type))
732 dev_warn(&s->dev, "rescanning the bus failed\n");
736 #ifdef CONFIG_PCMCIA_LOAD_CIS
739 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
740 * @dev: the pcmcia device which needs a CIS override
741 * @filename: requested filename in /lib/firmware/
743 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
744 * the one provided by the card is broken. The firmware files reside in
745 * /lib/firmware/ in userspace.
747 static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
749 struct pcmcia_socket *s = dev->socket;
750 const struct firmware *fw;
752 cistpl_longlink_mfc_t mfc;
753 int old_funcs, new_funcs = 1;
758 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
760 if (request_firmware(&fw, filename, &dev->dev) == 0) {
761 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
763 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
767 if (!pcmcia_replace_cis(s, fw->data, fw->size))
770 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
774 /* we need to re-start if the number of functions changed */
775 old_funcs = s->functions;
776 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
780 if (old_funcs != new_funcs)
783 /* update information */
784 pcmcia_device_query(dev);
786 /* requery (as number of functions might have changed) */
787 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
790 release_firmware(fw);
795 #else /* !CONFIG_PCMCIA_LOAD_CIS */
797 static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
806 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
807 const struct pcmcia_device_id *did)
809 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
810 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
815 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
819 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
820 if (dev->func != did->function)
824 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
825 if (!dev->prod_id[0])
827 if (strcmp(did->prod_id[0], dev->prod_id[0]))
831 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
832 if (!dev->prod_id[1])
834 if (strcmp(did->prod_id[1], dev->prod_id[1]))
838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
839 if (!dev->prod_id[2])
841 if (strcmp(did->prod_id[2], dev->prod_id[2]))
845 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
846 if (!dev->prod_id[3])
848 if (strcmp(did->prod_id[3], dev->prod_id[3]))
852 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
853 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
854 mutex_lock(&dev->socket->ops_mutex);
855 dev->socket->pcmcia_pfc = 1;
856 mutex_unlock(&dev->socket->ops_mutex);
857 if (dev->device_no != did->device_no)
861 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
864 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
867 /* if this is a pseudo-multi-function device,
868 * we need explicit matches */
869 if (dev->socket->pcmcia_pfc)
874 /* also, FUNC_ID matching needs to be activated by userspace
875 * after it has re-checked that there is no possible module
876 * with a prod_id/manf_id/card_id match.
878 mutex_lock(&dev->socket->ops_mutex);
879 ret = dev->allow_func_id_match;
880 mutex_unlock(&dev->socket->ops_mutex);
884 "skipping FUNC_ID match until userspace ACK\n");
889 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
890 dev_dbg(&dev->dev, "device needs a fake CIS\n");
891 if (!dev->socket->fake_cis)
892 if (pcmcia_load_firmware(dev, did->cisfile))
896 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
898 for (i = 0; i < 4; i++)
901 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
909 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
911 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
912 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
913 const struct pcmcia_device_id *did = p_drv->id_table;
914 struct pcmcia_dynid *dynid;
916 /* match dynamic devices first */
917 mutex_lock(&p_drv->dynids.lock);
918 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
919 dev_dbg(dev, "trying to match to %s\n", drv->name);
920 if (pcmcia_devmatch(p_dev, &dynid->id)) {
921 dev_dbg(dev, "matched to %s\n", drv->name);
922 mutex_unlock(&p_drv->dynids.lock);
926 mutex_unlock(&p_drv->dynids.lock);
928 while (did && did->match_flags) {
929 dev_dbg(dev, "trying to match to %s\n", drv->name);
930 if (pcmcia_devmatch(p_dev, did)) {
931 dev_dbg(dev, "matched to %s\n", drv->name);
940 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
942 struct pcmcia_device *p_dev;
944 u32 hash[4] = { 0, 0, 0, 0};
949 p_dev = to_pcmcia_dev(dev);
951 /* calculate hashes */
952 for (i = 0; i < 4; i++) {
953 if (!p_dev->prod_id[i])
955 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
958 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
961 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
964 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
965 "pa%08Xpb%08Xpc%08Xpd%08X",
966 p_dev->has_manf_id ? p_dev->manf_id : 0,
967 p_dev->has_card_id ? p_dev->card_id : 0,
968 p_dev->has_func_id ? p_dev->func_id : 0,
980 /************************ runtime PM support ***************************/
982 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
983 static int pcmcia_dev_resume(struct device *dev);
985 static int runtime_suspend(struct device *dev)
990 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
995 static int runtime_resume(struct device *dev)
1000 rc = pcmcia_dev_resume(dev);
1005 /************************ per-device sysfs output ***************************/
1007 #define pcmcia_device_attr(field, test, format) \
1008 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1010 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1011 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1013 static DEVICE_ATTR_RO(field);
1015 #define pcmcia_device_stringattr(name, field) \
1016 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1018 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1019 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1021 static DEVICE_ATTR_RO(name);
1023 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1024 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1025 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1026 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1027 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1028 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1029 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1031 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1034 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1035 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1037 static DEVICE_ATTR_RO(function);
1039 static ssize_t resources_show(struct device *dev,
1040 struct device_attribute *attr, char *buf)
1042 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1046 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1047 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1051 static DEVICE_ATTR_RO(resources);
1053 static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1057 if (p_dev->suspended)
1058 return sprintf(buf, "off\n");
1060 return sprintf(buf, "on\n");
1063 static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1064 const char *buf, size_t count)
1066 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1072 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1073 ret = runtime_suspend(dev);
1074 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1075 ret = runtime_resume(dev);
1077 return ret ? ret : count;
1079 static DEVICE_ATTR_RW(pm_state);
1081 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1083 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1085 u32 hash[4] = { 0, 0, 0, 0};
1087 /* calculate hashes */
1088 for (i = 0; i < 4; i++) {
1089 if (!p_dev->prod_id[i])
1091 hash[i] = crc32(0, p_dev->prod_id[i],
1092 strlen(p_dev->prod_id[i]));
1094 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1095 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1096 p_dev->has_manf_id ? p_dev->manf_id : 0,
1097 p_dev->has_card_id ? p_dev->card_id : 0,
1098 p_dev->has_func_id ? p_dev->func_id : 0,
1099 p_dev->func, p_dev->device_no,
1100 hash[0], hash[1], hash[2], hash[3]);
1102 static DEVICE_ATTR_RO(modalias);
1104 static ssize_t allow_func_id_match_store(struct device *dev,
1105 struct device_attribute *attr, const char *buf, size_t count)
1107 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1112 mutex_lock(&p_dev->socket->ops_mutex);
1113 p_dev->allow_func_id_match = 1;
1114 mutex_unlock(&p_dev->socket->ops_mutex);
1115 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1119 static DEVICE_ATTR_WO(allow_func_id_match);
1121 static struct attribute *pcmcia_dev_attrs[] = {
1122 &dev_attr_resources.attr,
1123 &dev_attr_pm_state.attr,
1124 &dev_attr_function.attr,
1125 &dev_attr_func_id.attr,
1126 &dev_attr_manf_id.attr,
1127 &dev_attr_card_id.attr,
1128 &dev_attr_prod_id1.attr,
1129 &dev_attr_prod_id2.attr,
1130 &dev_attr_prod_id3.attr,
1131 &dev_attr_prod_id4.attr,
1132 &dev_attr_modalias.attr,
1133 &dev_attr_allow_func_id_match.attr,
1136 ATTRIBUTE_GROUPS(pcmcia_dev);
1138 /* PM support, also needed for reset */
1140 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1142 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1143 struct pcmcia_driver *p_drv = NULL;
1146 mutex_lock(&p_dev->socket->ops_mutex);
1147 if (p_dev->suspended) {
1148 mutex_unlock(&p_dev->socket->ops_mutex);
1151 p_dev->suspended = 1;
1152 mutex_unlock(&p_dev->socket->ops_mutex);
1154 dev_dbg(dev, "suspending\n");
1157 p_drv = to_pcmcia_drv(dev->driver);
1162 if (p_drv->suspend) {
1163 ret = p_drv->suspend(p_dev);
1166 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1167 p_dev->devname, p_drv->name, ret);
1168 mutex_lock(&p_dev->socket->ops_mutex);
1169 p_dev->suspended = 0;
1170 mutex_unlock(&p_dev->socket->ops_mutex);
1175 if (p_dev->device_no == p_dev->func) {
1176 dev_dbg(dev, "releasing configuration\n");
1177 pcmcia_release_configuration(p_dev);
1185 static int pcmcia_dev_resume(struct device *dev)
1187 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1188 struct pcmcia_driver *p_drv = NULL;
1191 mutex_lock(&p_dev->socket->ops_mutex);
1192 if (!p_dev->suspended) {
1193 mutex_unlock(&p_dev->socket->ops_mutex);
1196 p_dev->suspended = 0;
1197 mutex_unlock(&p_dev->socket->ops_mutex);
1199 dev_dbg(dev, "resuming\n");
1202 p_drv = to_pcmcia_drv(dev->driver);
1207 if (p_dev->device_no == p_dev->func) {
1208 dev_dbg(dev, "requesting configuration\n");
1209 ret = pcmcia_enable_device(p_dev);
1215 ret = p_drv->resume(p_dev);
1222 static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1224 struct pcmcia_socket *skt = _data;
1225 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1227 if (p_dev->socket != skt || p_dev->suspended)
1230 return runtime_suspend(dev);
1233 static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1235 struct pcmcia_socket *skt = _data;
1236 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1238 if (p_dev->socket != skt || !p_dev->suspended)
1241 runtime_resume(dev);
1246 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1248 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1249 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1253 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1255 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1256 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1257 pcmcia_bus_suspend_callback)) {
1258 pcmcia_bus_resume(skt);
1264 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1266 atomic_set(&skt->present, 0);
1267 pcmcia_card_remove(skt, NULL);
1269 mutex_lock(&skt->ops_mutex);
1270 destroy_cis_cache(skt);
1271 pcmcia_cleanup_irq(skt);
1272 mutex_unlock(&skt->ops_mutex);
1277 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1279 atomic_set(&skt->present, 1);
1281 mutex_lock(&skt->ops_mutex);
1282 skt->pcmcia_pfc = 0;
1283 destroy_cis_cache(skt); /* to be on the safe side... */
1284 mutex_unlock(&skt->ops_mutex);
1286 pcmcia_card_add(skt);
1291 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1293 if (!verify_cis_cache(skt))
1296 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1298 /* first, remove the card */
1299 pcmcia_bus_remove(skt);
1301 mutex_lock(&skt->ops_mutex);
1302 destroy_cis_cache(skt);
1303 kfree(skt->fake_cis);
1304 skt->fake_cis = NULL;
1306 mutex_unlock(&skt->ops_mutex);
1308 /* now, add the new card */
1309 pcmcia_bus_add(skt);
1315 * NOTE: This is racy. There's no guarantee the card will still be
1316 * physically present, even if the call to this function returns
1317 * non-NULL. Furthermore, the device driver most likely is unbound
1318 * almost immediately, so the timeframe where pcmcia_dev_present
1319 * returns NULL is probably really really small.
1321 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1323 struct pcmcia_device *p_dev;
1324 struct pcmcia_device *ret = NULL;
1326 p_dev = pcmcia_get_dev(_p_dev);
1330 if (atomic_read(&p_dev->socket->present) != 0)
1333 pcmcia_put_dev(p_dev);
1336 EXPORT_SYMBOL(pcmcia_dev_present);
1339 static struct pcmcia_callback pcmcia_bus_callback = {
1340 .owner = THIS_MODULE,
1341 .add = pcmcia_bus_add,
1342 .remove = pcmcia_bus_remove,
1343 .requery = pcmcia_requery,
1344 .validate = pccard_validate_cis,
1345 .suspend = pcmcia_bus_suspend,
1346 .early_resume = pcmcia_bus_early_resume,
1347 .resume = pcmcia_bus_resume,
1350 static int pcmcia_bus_add_socket(struct device *dev,
1351 struct class_interface *class_intf)
1353 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1356 socket = pcmcia_get_socket(socket);
1358 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1362 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1364 dev_err(dev, "PCMCIA registration failed\n");
1365 pcmcia_put_socket(socket);
1369 INIT_LIST_HEAD(&socket->devices_list);
1370 socket->pcmcia_pfc = 0;
1371 socket->device_count = 0;
1372 atomic_set(&socket->present, 0);
1374 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1376 dev_err(dev, "PCMCIA registration failed\n");
1377 pcmcia_put_socket(socket);
1384 static void pcmcia_bus_remove_socket(struct device *dev,
1385 struct class_interface *class_intf)
1387 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1392 pccard_register_pcmcia(socket, NULL);
1394 /* unregister any unbound devices */
1395 mutex_lock(&socket->skt_mutex);
1396 pcmcia_card_remove(socket, NULL);
1397 release_cis_mem(socket);
1398 mutex_unlock(&socket->skt_mutex);
1400 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1402 pcmcia_put_socket(socket);
1408 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1409 static struct class_interface pcmcia_bus_interface __refdata = {
1410 .class = &pcmcia_socket_class,
1411 .add_dev = &pcmcia_bus_add_socket,
1412 .remove_dev = &pcmcia_bus_remove_socket,
1416 struct bus_type pcmcia_bus_type = {
1418 .uevent = pcmcia_bus_uevent,
1419 .match = pcmcia_bus_match,
1420 .dev_groups = pcmcia_dev_groups,
1421 .probe = pcmcia_device_probe,
1422 .remove = pcmcia_device_remove,
1423 .suspend = pcmcia_dev_suspend,
1424 .resume = pcmcia_dev_resume,
1428 static int __init init_pcmcia_bus(void)
1432 ret = bus_register(&pcmcia_bus_type);
1434 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1437 ret = class_interface_register(&pcmcia_bus_interface);
1440 "pcmcia: class_interface_register error: %d\n", ret);
1441 bus_unregister(&pcmcia_bus_type);
1447 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1448 * pcmcia_socket_class is already registered */
1451 static void __exit exit_pcmcia_bus(void)
1453 class_interface_unregister(&pcmcia_bus_interface);
1455 bus_unregister(&pcmcia_bus_type);
1457 module_exit(exit_pcmcia_bus);