2 * card.c - contains functions for managing groups of PnP devices
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
8 #include <linux/module.h>
9 #include <linux/slab.h>
10 #include <linux/pnp.h>
14 static LIST_HEAD(pnp_card_drivers);
16 static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
17 struct pnp_card *card)
19 const struct pnp_card_device_id *drv_id = drv->id_table;
21 if (compare_pnp_id(card->id, drv_id->id)) {
26 if (i == PNP_MAX_DEVICES
27 || !*drv_id->devs[i].id)
30 card_for_each_dev(card, dev) {
32 (dev->id, drv_id->devs[i].id)) {
47 static void card_remove(struct pnp_dev *dev)
49 dev->card_link = NULL;
52 static void card_remove_first(struct pnp_dev *dev)
54 struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
55 if (!dev->card || !drv)
58 drv->remove(dev->card_link);
59 drv->link.remove = &card_remove;
60 kfree(dev->card_link);
64 static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
66 const struct pnp_card_device_id *id;
67 struct pnp_card_link *clink;
72 id = match_card(drv, card);
76 clink = pnp_alloc(sizeof(*clink));
81 clink->pm_state = PMSG_ON;
83 if (drv->probe(clink, id) >= 0)
87 card_for_each_dev(card, dev) {
88 if (dev->card_link == clink)
89 pnp_release_card_device(dev);
96 * pnp_add_card_id - adds an EISA id to the specified card
97 * @id: pointer to a pnp_id structure
98 * @card: pointer to the desired card
102 int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card)
111 while (ptr && ptr->next)
120 static void pnp_free_card_ids(struct pnp_card *card)
134 static void pnp_release_card(struct device *dmdev)
136 struct pnp_card *card = to_pnp_card(dmdev);
137 pnp_free_card_ids(card);
141 static ssize_t pnp_show_card_name(struct device *dmdev,
142 struct device_attribute *attr, char *buf)
145 struct pnp_card *card = to_pnp_card(dmdev);
146 str += sprintf(str, "%s\n", card->name);
150 static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
152 static ssize_t pnp_show_card_ids(struct device *dmdev,
153 struct device_attribute *attr, char *buf)
156 struct pnp_card *card = to_pnp_card(dmdev);
157 struct pnp_id *pos = card->id;
160 str += sprintf(str, "%s\n", pos->id);
166 static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
168 static int pnp_interface_attach_card(struct pnp_card *card)
170 int rc = device_create_file(&card->dev, &dev_attr_name);
174 rc = device_create_file(&card->dev, &dev_attr_card_id);
181 device_remove_file(&card->dev, &dev_attr_name);
186 * pnp_add_card - adds a PnP card to the PnP Layer
187 * @card: pointer to the card to add
190 int pnp_add_card(struct pnp_card *card)
193 struct list_head *pos, *temp;
194 if (!card || !card->protocol)
197 sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
199 card->dev.parent = &card->protocol->dev;
200 card->dev.bus = NULL;
201 card->dev.release = &pnp_release_card;
202 error = device_register(&card->dev);
205 pnp_interface_attach_card(card);
206 spin_lock(&pnp_lock);
207 list_add_tail(&card->global_list, &pnp_cards);
208 list_add_tail(&card->protocol_list, &card->protocol->cards);
209 spin_unlock(&pnp_lock);
211 /* we wait until now to add devices in order to ensure the drivers
212 * will be able to use all of the related devices on the card
213 * without waiting any unresonable length of time */
214 list_for_each(pos, &card->devices) {
215 struct pnp_dev *dev = card_to_pnp_dev(pos);
216 __pnp_add_device(dev);
219 /* match with card drivers */
220 list_for_each_safe(pos, temp, &pnp_card_drivers) {
221 struct pnp_card_driver *drv =
222 list_entry(pos, struct pnp_card_driver,
224 card_probe(card, drv);
227 pnp_err("sysfs failure, card '%s' will be unavailable",
233 * pnp_remove_card - removes a PnP card from the PnP Layer
234 * @card: pointer to the card to remove
237 void pnp_remove_card(struct pnp_card *card)
239 struct list_head *pos, *temp;
242 device_unregister(&card->dev);
243 spin_lock(&pnp_lock);
244 list_del(&card->global_list);
245 list_del(&card->protocol_list);
246 spin_unlock(&pnp_lock);
247 list_for_each_safe(pos, temp, &card->devices) {
248 struct pnp_dev *dev = card_to_pnp_dev(pos);
249 pnp_remove_card_device(dev);
254 * pnp_add_card_device - adds a device to the specified card
255 * @card: pointer to the card to add to
256 * @dev: pointer to the device to add
259 int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
261 if (!card || !dev || !dev->protocol)
263 dev->dev.parent = &card->dev;
264 dev->card_link = NULL;
265 snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x",
266 dev->protocol->number, card->number, dev->number);
267 spin_lock(&pnp_lock);
269 list_add_tail(&dev->card_list, &card->devices);
270 spin_unlock(&pnp_lock);
275 * pnp_remove_card_device- removes a device from the specified card
276 * @dev: pointer to the device to remove
279 void pnp_remove_card_device(struct pnp_dev *dev)
281 spin_lock(&pnp_lock);
283 list_del(&dev->card_list);
284 spin_unlock(&pnp_lock);
285 __pnp_remove_device(dev);
289 * pnp_request_card_device - Searches for a PnP device under the specified card
290 * @clink: pointer to the card link, cannot be NULL
291 * @id: pointer to a PnP ID structure that explains the rules for finding the device
292 * @from: Starting place to search from. If NULL it will start from the begining.
295 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
296 const char *id, struct pnp_dev *from)
298 struct list_head *pos;
300 struct pnp_card_driver *drv;
301 struct pnp_card *card;
307 pos = card->devices.next;
309 if (from->card != card)
311 pos = from->card_list.next;
313 while (pos != &card->devices) {
314 dev = card_to_pnp_dev(pos);
315 if ((!dev->card_link) && compare_pnp_id(dev->id, id))
324 dev->card_link = clink;
325 dev->dev.driver = &drv->link.driver;
326 if (pnp_bus_type.probe(&dev->dev))
328 if (device_bind_driver(&dev->dev))
334 dev->dev.driver = NULL;
335 dev->card_link = NULL;
340 * pnp_release_card_device - call this when the driver no longer needs the device
341 * @dev: pointer to the PnP device stucture
344 void pnp_release_card_device(struct pnp_dev *dev)
346 struct pnp_card_driver *drv = dev->card_link->driver;
349 drv->link.remove = &card_remove;
350 device_release_driver(&dev->dev);
351 drv->link.remove = &card_remove_first;
355 * suspend/resume callbacks
357 static int card_suspend(struct pnp_dev *dev, pm_message_t state)
359 struct pnp_card_link *link = dev->card_link;
360 if (link->pm_state.event == state.event)
362 link->pm_state = state;
363 return link->driver->suspend(link, state);
366 static int card_resume(struct pnp_dev *dev)
368 struct pnp_card_link *link = dev->card_link;
369 if (link->pm_state.event == PM_EVENT_ON)
371 link->pm_state = PMSG_ON;
372 link->driver->resume(link);
377 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
378 * @drv: pointer to the driver to register
381 int pnp_register_card_driver(struct pnp_card_driver *drv)
384 struct list_head *pos, *temp;
386 drv->link.name = drv->name;
387 drv->link.id_table = NULL; /* this will disable auto matching */
388 drv->link.flags = drv->flags;
389 drv->link.probe = NULL;
390 drv->link.remove = &card_remove_first;
391 drv->link.suspend = drv->suspend ? card_suspend : NULL;
392 drv->link.resume = drv->resume ? card_resume : NULL;
394 error = pnp_register_driver(&drv->link);
398 spin_lock(&pnp_lock);
399 list_add_tail(&drv->global_list, &pnp_card_drivers);
400 spin_unlock(&pnp_lock);
402 list_for_each_safe(pos, temp, &pnp_cards) {
403 struct pnp_card *card =
404 list_entry(pos, struct pnp_card, global_list);
405 card_probe(card, drv);
411 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
412 * @drv: pointer to the driver to unregister
415 void pnp_unregister_card_driver(struct pnp_card_driver *drv)
417 spin_lock(&pnp_lock);
418 list_del(&drv->global_list);
419 spin_unlock(&pnp_lock);
420 pnp_unregister_driver(&drv->link);
424 EXPORT_SYMBOL(pnp_add_card);
425 EXPORT_SYMBOL(pnp_remove_card);
426 EXPORT_SYMBOL(pnp_add_card_device);
427 EXPORT_SYMBOL(pnp_remove_card_device);
428 EXPORT_SYMBOL(pnp_add_card_id);
430 EXPORT_SYMBOL(pnp_request_card_device);
431 EXPORT_SYMBOL(pnp_release_card_device);
432 EXPORT_SYMBOL(pnp_register_card_driver);
433 EXPORT_SYMBOL(pnp_unregister_card_driver);