Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * card.c - contains functions for managing groups of PnP devices | |
3 | * | |
4 | * Copyright 2002 Adam Belay <ambx1@neo.rr.com> | |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/slab.h> | |
1da177e4 LT |
9 | #include <linux/pnp.h> |
10 | #include "base.h" | |
11 | ||
12 | LIST_HEAD(pnp_cards); | |
b449f63c | 13 | static LIST_HEAD(pnp_card_drivers); |
1da177e4 | 14 | |
9dd78466 BH |
15 | static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv, |
16 | struct pnp_card *card) | |
1da177e4 | 17 | { |
9dd78466 | 18 | const struct pnp_card_device_id *drv_id = drv->id_table; |
07d4e9af | 19 | |
9dd78466 BH |
20 | while (*drv_id->id) { |
21 | if (compare_pnp_id(card->id, drv_id->id)) { | |
1da177e4 | 22 | int i = 0; |
07d4e9af | 23 | |
1da177e4 LT |
24 | for (;;) { |
25 | int found; | |
26 | struct pnp_dev *dev; | |
07d4e9af | 27 | |
1e0aa9ad BH |
28 | if (i == PNP_MAX_DEVICES || |
29 | !*drv_id->devs[i].id) | |
1da177e4 LT |
30 | return drv_id; |
31 | found = 0; | |
32 | card_for_each_dev(card, dev) { | |
1e0aa9ad BH |
33 | if (compare_pnp_id(dev->id, |
34 | drv_id->devs[i].id)) { | |
1da177e4 LT |
35 | found = 1; |
36 | break; | |
37 | } | |
38 | } | |
9dd78466 | 39 | if (!found) |
1da177e4 LT |
40 | break; |
41 | i++; | |
42 | } | |
43 | } | |
44 | drv_id++; | |
45 | } | |
46 | return NULL; | |
47 | } | |
48 | ||
9dd78466 | 49 | static void card_remove(struct pnp_dev *dev) |
1da177e4 LT |
50 | { |
51 | dev->card_link = NULL; | |
52 | } | |
982c6094 | 53 | |
9dd78466 | 54 | static void card_remove_first(struct pnp_dev *dev) |
1da177e4 | 55 | { |
9dd78466 | 56 | struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver); |
07d4e9af | 57 | |
1da177e4 LT |
58 | if (!dev->card || !drv) |
59 | return; | |
60 | if (drv->remove) | |
61 | drv->remove(dev->card_link); | |
62 | drv->link.remove = &card_remove; | |
63 | kfree(dev->card_link); | |
64 | card_remove(dev); | |
65 | } | |
66 | ||
a9adb8db | 67 | static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv) |
1da177e4 | 68 | { |
a9adb8db JJ |
69 | const struct pnp_card_device_id *id; |
70 | struct pnp_card_link *clink; | |
71 | struct pnp_dev *dev; | |
72 | ||
73 | if (!drv->probe) | |
74 | return 0; | |
9dd78466 | 75 | id = match_card(drv, card); |
a9adb8db JJ |
76 | if (!id) |
77 | return 0; | |
78 | ||
79 | clink = pnp_alloc(sizeof(*clink)); | |
80 | if (!clink) | |
81 | return 0; | |
82 | clink->card = card; | |
83 | clink->driver = drv; | |
84 | clink->pm_state = PMSG_ON; | |
85 | ||
86 | if (drv->probe(clink, id) >= 0) | |
87 | return 1; | |
88 | ||
89 | /* Recovery */ | |
90 | card_for_each_dev(card, dev) { | |
91 | if (dev->card_link == clink) | |
92 | pnp_release_card_device(dev); | |
1da177e4 | 93 | } |
a9adb8db | 94 | kfree(clink); |
1da177e4 LT |
95 | return 0; |
96 | } | |
97 | ||
98 | /** | |
99 | * pnp_add_card_id - adds an EISA id to the specified card | |
100 | * @id: pointer to a pnp_id structure | |
101 | * @card: pointer to the desired card | |
1da177e4 | 102 | */ |
9dd78466 | 103 | int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card) |
1da177e4 | 104 | { |
9dd78466 | 105 | struct pnp_id *ptr; |
07d4e9af | 106 | |
1da177e4 LT |
107 | if (!id) |
108 | return -EINVAL; | |
109 | if (!card) | |
110 | return -EINVAL; | |
111 | id->next = NULL; | |
112 | ptr = card->id; | |
113 | while (ptr && ptr->next) | |
114 | ptr = ptr->next; | |
115 | if (ptr) | |
116 | ptr->next = id; | |
117 | else | |
118 | card->id = id; | |
119 | return 0; | |
120 | } | |
121 | ||
9dd78466 | 122 | static void pnp_free_card_ids(struct pnp_card *card) |
1da177e4 | 123 | { |
9dd78466 | 124 | struct pnp_id *id; |
1da177e4 | 125 | struct pnp_id *next; |
07d4e9af | 126 | |
1da177e4 LT |
127 | if (!card) |
128 | return; | |
129 | id = card->id; | |
130 | while (id) { | |
131 | next = id->next; | |
132 | kfree(id); | |
133 | id = next; | |
134 | } | |
135 | } | |
136 | ||
137 | static void pnp_release_card(struct device *dmdev) | |
138 | { | |
9dd78466 | 139 | struct pnp_card *card = to_pnp_card(dmdev); |
07d4e9af | 140 | |
1da177e4 LT |
141 | pnp_free_card_ids(card); |
142 | kfree(card); | |
143 | } | |
144 | ||
9dd78466 BH |
145 | static ssize_t pnp_show_card_name(struct device *dmdev, |
146 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
147 | { |
148 | char *str = buf; | |
149 | struct pnp_card *card = to_pnp_card(dmdev); | |
07d4e9af | 150 | |
9dd78466 | 151 | str += sprintf(str, "%s\n", card->name); |
1da177e4 LT |
152 | return (str - buf); |
153 | } | |
154 | ||
9dd78466 | 155 | static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL); |
1da177e4 | 156 | |
9dd78466 BH |
157 | static ssize_t pnp_show_card_ids(struct device *dmdev, |
158 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
159 | { |
160 | char *str = buf; | |
161 | struct pnp_card *card = to_pnp_card(dmdev); | |
9dd78466 | 162 | struct pnp_id *pos = card->id; |
1da177e4 LT |
163 | |
164 | while (pos) { | |
9dd78466 | 165 | str += sprintf(str, "%s\n", pos->id); |
1da177e4 LT |
166 | pos = pos->next; |
167 | } | |
168 | return (str - buf); | |
169 | } | |
170 | ||
9dd78466 | 171 | static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL); |
1da177e4 LT |
172 | |
173 | static int pnp_interface_attach_card(struct pnp_card *card) | |
174 | { | |
9dd78466 | 175 | int rc = device_create_file(&card->dev, &dev_attr_name); |
07d4e9af | 176 | |
9dd78466 BH |
177 | if (rc) |
178 | return rc; | |
bfc7ee20 | 179 | |
9dd78466 BH |
180 | rc = device_create_file(&card->dev, &dev_attr_card_id); |
181 | if (rc) | |
182 | goto err_name; | |
bfc7ee20 | 183 | |
1da177e4 | 184 | return 0; |
bfc7ee20 | 185 | |
1e0aa9ad | 186 | err_name: |
9dd78466 | 187 | device_remove_file(&card->dev, &dev_attr_name); |
bfc7ee20 | 188 | return rc; |
1da177e4 LT |
189 | } |
190 | ||
191 | /** | |
192 | * pnp_add_card - adds a PnP card to the PnP Layer | |
193 | * @card: pointer to the card to add | |
194 | */ | |
9dd78466 | 195 | int pnp_add_card(struct pnp_card *card) |
1da177e4 LT |
196 | { |
197 | int error; | |
9dd78466 | 198 | struct list_head *pos, *temp; |
07d4e9af | 199 | |
1da177e4 LT |
200 | if (!card || !card->protocol) |
201 | return -EINVAL; | |
202 | ||
9dd78466 BH |
203 | sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, |
204 | card->number); | |
1da177e4 LT |
205 | card->dev.parent = &card->protocol->dev; |
206 | card->dev.bus = NULL; | |
207 | card->dev.release = &pnp_release_card; | |
208 | error = device_register(&card->dev); | |
209 | ||
210 | if (error == 0) { | |
211 | pnp_interface_attach_card(card); | |
212 | spin_lock(&pnp_lock); | |
213 | list_add_tail(&card->global_list, &pnp_cards); | |
214 | list_add_tail(&card->protocol_list, &card->protocol->cards); | |
215 | spin_unlock(&pnp_lock); | |
216 | ||
217 | /* we wait until now to add devices in order to ensure the drivers | |
218 | * will be able to use all of the related devices on the card | |
219 | * without waiting any unresonable length of time */ | |
9dd78466 | 220 | list_for_each(pos, &card->devices) { |
1da177e4 LT |
221 | struct pnp_dev *dev = card_to_pnp_dev(pos); |
222 | __pnp_add_device(dev); | |
223 | } | |
224 | ||
225 | /* match with card drivers */ | |
9dd78466 BH |
226 | list_for_each_safe(pos, temp, &pnp_card_drivers) { |
227 | struct pnp_card_driver *drv = | |
228 | list_entry(pos, struct pnp_card_driver, | |
229 | global_list); | |
230 | card_probe(card, drv); | |
1da177e4 LT |
231 | } |
232 | } else | |
9dd78466 BH |
233 | pnp_err("sysfs failure, card '%s' will be unavailable", |
234 | card->dev.bus_id); | |
1da177e4 LT |
235 | return error; |
236 | } | |
237 | ||
238 | /** | |
239 | * pnp_remove_card - removes a PnP card from the PnP Layer | |
240 | * @card: pointer to the card to remove | |
241 | */ | |
9dd78466 | 242 | void pnp_remove_card(struct pnp_card *card) |
1da177e4 LT |
243 | { |
244 | struct list_head *pos, *temp; | |
07d4e9af | 245 | |
1da177e4 LT |
246 | if (!card) |
247 | return; | |
248 | device_unregister(&card->dev); | |
249 | spin_lock(&pnp_lock); | |
250 | list_del(&card->global_list); | |
251 | list_del(&card->protocol_list); | |
252 | spin_unlock(&pnp_lock); | |
9dd78466 | 253 | list_for_each_safe(pos, temp, &card->devices) { |
1da177e4 LT |
254 | struct pnp_dev *dev = card_to_pnp_dev(pos); |
255 | pnp_remove_card_device(dev); | |
256 | } | |
257 | } | |
258 | ||
259 | /** | |
260 | * pnp_add_card_device - adds a device to the specified card | |
261 | * @card: pointer to the card to add to | |
262 | * @dev: pointer to the device to add | |
263 | */ | |
9dd78466 | 264 | int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) |
1da177e4 LT |
265 | { |
266 | if (!card || !dev || !dev->protocol) | |
267 | return -EINVAL; | |
268 | dev->dev.parent = &card->dev; | |
269 | dev->card_link = NULL; | |
9dd78466 BH |
270 | snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", |
271 | dev->protocol->number, card->number, dev->number); | |
1da177e4 LT |
272 | spin_lock(&pnp_lock); |
273 | dev->card = card; | |
274 | list_add_tail(&dev->card_list, &card->devices); | |
275 | spin_unlock(&pnp_lock); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | /** | |
280 | * pnp_remove_card_device- removes a device from the specified card | |
1da177e4 LT |
281 | * @dev: pointer to the device to remove |
282 | */ | |
9dd78466 | 283 | void pnp_remove_card_device(struct pnp_dev *dev) |
1da177e4 LT |
284 | { |
285 | spin_lock(&pnp_lock); | |
286 | dev->card = NULL; | |
287 | list_del(&dev->card_list); | |
288 | spin_unlock(&pnp_lock); | |
289 | __pnp_remove_device(dev); | |
290 | } | |
291 | ||
292 | /** | |
293 | * pnp_request_card_device - Searches for a PnP device under the specified card | |
3d41088f | 294 | * @clink: pointer to the card link, cannot be NULL |
1da177e4 LT |
295 | * @id: pointer to a PnP ID structure that explains the rules for finding the device |
296 | * @from: Starting place to search from. If NULL it will start from the begining. | |
297 | */ | |
9dd78466 BH |
298 | struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, |
299 | const char *id, struct pnp_dev *from) | |
1da177e4 | 300 | { |
9dd78466 BH |
301 | struct list_head *pos; |
302 | struct pnp_dev *dev; | |
303 | struct pnp_card_driver *drv; | |
304 | struct pnp_card *card; | |
07d4e9af | 305 | |
1da177e4 LT |
306 | if (!clink || !id) |
307 | goto done; | |
308 | card = clink->card; | |
309 | drv = clink->driver; | |
310 | if (!from) { | |
311 | pos = card->devices.next; | |
312 | } else { | |
313 | if (from->card != card) | |
314 | goto done; | |
315 | pos = from->card_list.next; | |
316 | } | |
317 | while (pos != &card->devices) { | |
318 | dev = card_to_pnp_dev(pos); | |
9dd78466 | 319 | if ((!dev->card_link) && compare_pnp_id(dev->id, id)) |
1da177e4 LT |
320 | goto found; |
321 | pos = pos->next; | |
322 | } | |
323 | ||
1e0aa9ad | 324 | done: |
1da177e4 LT |
325 | return NULL; |
326 | ||
1e0aa9ad | 327 | found: |
1da177e4 LT |
328 | dev->card_link = clink; |
329 | dev->dev.driver = &drv->link.driver; | |
bfc7ee20 JG |
330 | if (pnp_bus_type.probe(&dev->dev)) |
331 | goto err_out; | |
332 | if (device_bind_driver(&dev->dev)) | |
333 | goto err_out; | |
334 | ||
1da177e4 | 335 | return dev; |
bfc7ee20 | 336 | |
1e0aa9ad | 337 | err_out: |
bfc7ee20 JG |
338 | dev->dev.driver = NULL; |
339 | dev->card_link = NULL; | |
bfc7ee20 | 340 | return NULL; |
1da177e4 LT |
341 | } |
342 | ||
343 | /** | |
344 | * pnp_release_card_device - call this when the driver no longer needs the device | |
345 | * @dev: pointer to the PnP device stucture | |
346 | */ | |
9dd78466 | 347 | void pnp_release_card_device(struct pnp_dev *dev) |
1da177e4 | 348 | { |
9dd78466 | 349 | struct pnp_card_driver *drv = dev->card_link->driver; |
07d4e9af | 350 | |
1da177e4 LT |
351 | if (!drv) |
352 | return; | |
1da177e4 LT |
353 | drv->link.remove = &card_remove; |
354 | device_release_driver(&dev->dev); | |
355 | drv->link.remove = &card_remove_first; | |
1da177e4 LT |
356 | } |
357 | ||
4c98cfef TI |
358 | /* |
359 | * suspend/resume callbacks | |
360 | */ | |
361 | static int card_suspend(struct pnp_dev *dev, pm_message_t state) | |
362 | { | |
363 | struct pnp_card_link *link = dev->card_link; | |
07d4e9af | 364 | |
4c98cfef TI |
365 | if (link->pm_state.event == state.event) |
366 | return 0; | |
367 | link->pm_state = state; | |
368 | return link->driver->suspend(link, state); | |
369 | } | |
370 | ||
371 | static int card_resume(struct pnp_dev *dev) | |
372 | { | |
373 | struct pnp_card_link *link = dev->card_link; | |
07d4e9af | 374 | |
4c98cfef TI |
375 | if (link->pm_state.event == PM_EVENT_ON) |
376 | return 0; | |
377 | link->pm_state = PMSG_ON; | |
378 | link->driver->resume(link); | |
379 | return 0; | |
380 | } | |
381 | ||
1da177e4 LT |
382 | /** |
383 | * pnp_register_card_driver - registers a PnP card driver with the PnP Layer | |
384 | * @drv: pointer to the driver to register | |
385 | */ | |
9dd78466 | 386 | int pnp_register_card_driver(struct pnp_card_driver *drv) |
1da177e4 | 387 | { |
982c6094 | 388 | int error; |
1da177e4 LT |
389 | struct list_head *pos, *temp; |
390 | ||
391 | drv->link.name = drv->name; | |
392 | drv->link.id_table = NULL; /* this will disable auto matching */ | |
393 | drv->link.flags = drv->flags; | |
394 | drv->link.probe = NULL; | |
395 | drv->link.remove = &card_remove_first; | |
4c98cfef TI |
396 | drv->link.suspend = drv->suspend ? card_suspend : NULL; |
397 | drv->link.resume = drv->resume ? card_resume : NULL; | |
1da177e4 | 398 | |
982c6094 BH |
399 | error = pnp_register_driver(&drv->link); |
400 | if (error < 0) | |
401 | return error; | |
d1d051b2 | 402 | |
1da177e4 LT |
403 | spin_lock(&pnp_lock); |
404 | list_add_tail(&drv->global_list, &pnp_card_drivers); | |
405 | spin_unlock(&pnp_lock); | |
d1d051b2 | 406 | |
9dd78466 BH |
407 | list_for_each_safe(pos, temp, &pnp_cards) { |
408 | struct pnp_card *card = | |
409 | list_entry(pos, struct pnp_card, global_list); | |
410 | card_probe(card, drv); | |
1da177e4 | 411 | } |
982c6094 | 412 | return 0; |
1da177e4 LT |
413 | } |
414 | ||
415 | /** | |
416 | * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer | |
417 | * @drv: pointer to the driver to unregister | |
418 | */ | |
9dd78466 | 419 | void pnp_unregister_card_driver(struct pnp_card_driver *drv) |
1da177e4 LT |
420 | { |
421 | spin_lock(&pnp_lock); | |
422 | list_del(&drv->global_list); | |
423 | spin_unlock(&pnp_lock); | |
424 | pnp_unregister_driver(&drv->link); | |
425 | } | |
426 | ||
1da177e4 LT |
427 | EXPORT_SYMBOL(pnp_request_card_device); |
428 | EXPORT_SYMBOL(pnp_release_card_device); | |
429 | EXPORT_SYMBOL(pnp_register_card_driver); | |
430 | EXPORT_SYMBOL(pnp_unregister_card_driver); |