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 | 7 | #include <linux/module.h> |
e436675f | 8 | #include <linux/ctype.h> |
1da177e4 | 9 | #include <linux/slab.h> |
1da177e4 LT |
10 | #include <linux/pnp.h> |
11 | #include "base.h" | |
12 | ||
13 | LIST_HEAD(pnp_cards); | |
b449f63c | 14 | static LIST_HEAD(pnp_card_drivers); |
1da177e4 | 15 | |
9dd78466 BH |
16 | static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv, |
17 | struct pnp_card *card) | |
1da177e4 | 18 | { |
9dd78466 | 19 | const struct pnp_card_device_id *drv_id = drv->id_table; |
07d4e9af | 20 | |
9dd78466 BH |
21 | while (*drv_id->id) { |
22 | if (compare_pnp_id(card->id, drv_id->id)) { | |
1da177e4 | 23 | int i = 0; |
07d4e9af | 24 | |
1da177e4 LT |
25 | for (;;) { |
26 | int found; | |
27 | struct pnp_dev *dev; | |
07d4e9af | 28 | |
1e0aa9ad BH |
29 | if (i == PNP_MAX_DEVICES || |
30 | !*drv_id->devs[i].id) | |
1da177e4 LT |
31 | return drv_id; |
32 | found = 0; | |
33 | card_for_each_dev(card, dev) { | |
1e0aa9ad BH |
34 | if (compare_pnp_id(dev->id, |
35 | drv_id->devs[i].id)) { | |
1da177e4 LT |
36 | found = 1; |
37 | break; | |
38 | } | |
39 | } | |
9dd78466 | 40 | if (!found) |
1da177e4 LT |
41 | break; |
42 | i++; | |
43 | } | |
44 | } | |
45 | drv_id++; | |
46 | } | |
47 | return NULL; | |
48 | } | |
49 | ||
9dd78466 | 50 | static void card_remove(struct pnp_dev *dev) |
1da177e4 LT |
51 | { |
52 | dev->card_link = NULL; | |
53 | } | |
982c6094 | 54 | |
9dd78466 | 55 | static void card_remove_first(struct pnp_dev *dev) |
1da177e4 | 56 | { |
9dd78466 | 57 | struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver); |
07d4e9af | 58 | |
1da177e4 LT |
59 | if (!dev->card || !drv) |
60 | return; | |
61 | if (drv->remove) | |
62 | drv->remove(dev->card_link); | |
63 | drv->link.remove = &card_remove; | |
64 | kfree(dev->card_link); | |
65 | card_remove(dev); | |
66 | } | |
67 | ||
a9adb8db | 68 | static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv) |
1da177e4 | 69 | { |
a9adb8db JJ |
70 | const struct pnp_card_device_id *id; |
71 | struct pnp_card_link *clink; | |
72 | struct pnp_dev *dev; | |
73 | ||
74 | if (!drv->probe) | |
75 | return 0; | |
9dd78466 | 76 | id = match_card(drv, card); |
a9adb8db JJ |
77 | if (!id) |
78 | return 0; | |
79 | ||
80 | clink = pnp_alloc(sizeof(*clink)); | |
81 | if (!clink) | |
82 | return 0; | |
83 | clink->card = card; | |
84 | clink->driver = drv; | |
85 | clink->pm_state = PMSG_ON; | |
86 | ||
87 | if (drv->probe(clink, id) >= 0) | |
88 | return 1; | |
89 | ||
90 | /* Recovery */ | |
91 | card_for_each_dev(card, dev) { | |
92 | if (dev->card_link == clink) | |
93 | pnp_release_card_device(dev); | |
1da177e4 | 94 | } |
a9adb8db | 95 | kfree(clink); |
1da177e4 LT |
96 | return 0; |
97 | } | |
98 | ||
99 | /** | |
100 | * pnp_add_card_id - adds an EISA id to the specified card | |
101 | * @id: pointer to a pnp_id structure | |
102 | * @card: pointer to the desired card | |
1da177e4 | 103 | */ |
e436675f | 104 | struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id) |
1da177e4 | 105 | { |
e436675f BH |
106 | struct pnp_id *dev_id, *ptr; |
107 | ||
108 | dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); | |
109 | if (!dev_id) | |
110 | return NULL; | |
111 | ||
112 | dev_id->id[0] = id[0]; | |
113 | dev_id->id[1] = id[1]; | |
114 | dev_id->id[2] = id[2]; | |
115 | dev_id->id[3] = tolower(id[3]); | |
116 | dev_id->id[4] = tolower(id[4]); | |
117 | dev_id->id[5] = tolower(id[5]); | |
118 | dev_id->id[6] = tolower(id[6]); | |
119 | dev_id->id[7] = '\0'; | |
120 | ||
121 | dev_id->next = NULL; | |
1da177e4 LT |
122 | ptr = card->id; |
123 | while (ptr && ptr->next) | |
124 | ptr = ptr->next; | |
125 | if (ptr) | |
e436675f | 126 | ptr->next = dev_id; |
1da177e4 | 127 | else |
e436675f BH |
128 | card->id = dev_id; |
129 | ||
130 | return dev_id; | |
1da177e4 LT |
131 | } |
132 | ||
9dd78466 | 133 | static void pnp_free_card_ids(struct pnp_card *card) |
1da177e4 | 134 | { |
9dd78466 | 135 | struct pnp_id *id; |
1da177e4 | 136 | struct pnp_id *next; |
07d4e9af | 137 | |
1da177e4 LT |
138 | id = card->id; |
139 | while (id) { | |
140 | next = id->next; | |
141 | kfree(id); | |
142 | id = next; | |
143 | } | |
144 | } | |
145 | ||
146 | static void pnp_release_card(struct device *dmdev) | |
147 | { | |
9dd78466 | 148 | struct pnp_card *card = to_pnp_card(dmdev); |
07d4e9af | 149 | |
1da177e4 LT |
150 | pnp_free_card_ids(card); |
151 | kfree(card); | |
152 | } | |
153 | ||
6bf2aab2 BH |
154 | struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid) |
155 | { | |
156 | struct pnp_card *card; | |
157 | struct pnp_id *dev_id; | |
158 | ||
159 | card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL); | |
160 | if (!card) | |
161 | return NULL; | |
162 | ||
163 | card->protocol = protocol; | |
164 | card->number = id; | |
165 | ||
166 | card->dev.parent = &card->protocol->dev; | |
167 | sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, | |
168 | card->number); | |
169 | ||
170 | dev_id = pnp_add_card_id(card, pnpid); | |
171 | if (!dev_id) { | |
172 | kfree(card); | |
173 | return NULL; | |
174 | } | |
175 | ||
176 | return card; | |
177 | } | |
178 | ||
9dd78466 BH |
179 | static ssize_t pnp_show_card_name(struct device *dmdev, |
180 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
181 | { |
182 | char *str = buf; | |
183 | struct pnp_card *card = to_pnp_card(dmdev); | |
07d4e9af | 184 | |
9dd78466 | 185 | str += sprintf(str, "%s\n", card->name); |
1da177e4 LT |
186 | return (str - buf); |
187 | } | |
188 | ||
9dd78466 | 189 | static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL); |
1da177e4 | 190 | |
9dd78466 BH |
191 | static ssize_t pnp_show_card_ids(struct device *dmdev, |
192 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
193 | { |
194 | char *str = buf; | |
195 | struct pnp_card *card = to_pnp_card(dmdev); | |
9dd78466 | 196 | struct pnp_id *pos = card->id; |
1da177e4 LT |
197 | |
198 | while (pos) { | |
9dd78466 | 199 | str += sprintf(str, "%s\n", pos->id); |
1da177e4 LT |
200 | pos = pos->next; |
201 | } | |
202 | return (str - buf); | |
203 | } | |
204 | ||
9dd78466 | 205 | static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL); |
1da177e4 LT |
206 | |
207 | static int pnp_interface_attach_card(struct pnp_card *card) | |
208 | { | |
9dd78466 | 209 | int rc = device_create_file(&card->dev, &dev_attr_name); |
07d4e9af | 210 | |
9dd78466 BH |
211 | if (rc) |
212 | return rc; | |
bfc7ee20 | 213 | |
9dd78466 BH |
214 | rc = device_create_file(&card->dev, &dev_attr_card_id); |
215 | if (rc) | |
216 | goto err_name; | |
bfc7ee20 | 217 | |
1da177e4 | 218 | return 0; |
bfc7ee20 | 219 | |
1e0aa9ad | 220 | err_name: |
9dd78466 | 221 | device_remove_file(&card->dev, &dev_attr_name); |
bfc7ee20 | 222 | return rc; |
1da177e4 LT |
223 | } |
224 | ||
225 | /** | |
226 | * pnp_add_card - adds a PnP card to the PnP Layer | |
227 | * @card: pointer to the card to add | |
228 | */ | |
9dd78466 | 229 | int pnp_add_card(struct pnp_card *card) |
1da177e4 LT |
230 | { |
231 | int error; | |
9dd78466 | 232 | struct list_head *pos, *temp; |
07d4e9af | 233 | |
1da177e4 LT |
234 | card->dev.bus = NULL; |
235 | card->dev.release = &pnp_release_card; | |
236 | error = device_register(&card->dev); | |
5bfc43a0 | 237 | if (error) { |
a05d0781 | 238 | dev_err(&card->dev, "could not register (err=%d)\n", error); |
5bfc43a0 BH |
239 | return error; |
240 | } | |
241 | ||
242 | pnp_interface_attach_card(card); | |
243 | spin_lock(&pnp_lock); | |
244 | list_add_tail(&card->global_list, &pnp_cards); | |
245 | list_add_tail(&card->protocol_list, &card->protocol->cards); | |
246 | spin_unlock(&pnp_lock); | |
247 | ||
248 | /* we wait until now to add devices in order to ensure the drivers | |
249 | * will be able to use all of the related devices on the card | |
250 | * without waiting an unreasonable length of time */ | |
251 | list_for_each(pos, &card->devices) { | |
252 | struct pnp_dev *dev = card_to_pnp_dev(pos); | |
253 | __pnp_add_device(dev); | |
254 | } | |
255 | ||
256 | /* match with card drivers */ | |
257 | list_for_each_safe(pos, temp, &pnp_card_drivers) { | |
258 | struct pnp_card_driver *drv = | |
259 | list_entry(pos, struct pnp_card_driver, | |
260 | global_list); | |
261 | card_probe(card, drv); | |
262 | } | |
263 | return 0; | |
1da177e4 LT |
264 | } |
265 | ||
266 | /** | |
267 | * pnp_remove_card - removes a PnP card from the PnP Layer | |
268 | * @card: pointer to the card to remove | |
269 | */ | |
9dd78466 | 270 | void pnp_remove_card(struct pnp_card *card) |
1da177e4 LT |
271 | { |
272 | struct list_head *pos, *temp; | |
07d4e9af | 273 | |
1da177e4 LT |
274 | device_unregister(&card->dev); |
275 | spin_lock(&pnp_lock); | |
276 | list_del(&card->global_list); | |
277 | list_del(&card->protocol_list); | |
278 | spin_unlock(&pnp_lock); | |
9dd78466 | 279 | list_for_each_safe(pos, temp, &card->devices) { |
1da177e4 LT |
280 | struct pnp_dev *dev = card_to_pnp_dev(pos); |
281 | pnp_remove_card_device(dev); | |
282 | } | |
283 | } | |
284 | ||
285 | /** | |
286 | * pnp_add_card_device - adds a device to the specified card | |
287 | * @card: pointer to the card to add to | |
288 | * @dev: pointer to the device to add | |
289 | */ | |
9dd78466 | 290 | int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) |
1da177e4 | 291 | { |
1da177e4 LT |
292 | dev->dev.parent = &card->dev; |
293 | dev->card_link = NULL; | |
9dd78466 BH |
294 | snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", |
295 | dev->protocol->number, card->number, dev->number); | |
1da177e4 LT |
296 | spin_lock(&pnp_lock); |
297 | dev->card = card; | |
298 | list_add_tail(&dev->card_list, &card->devices); | |
299 | spin_unlock(&pnp_lock); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | /** | |
304 | * pnp_remove_card_device- removes a device from the specified card | |
1da177e4 LT |
305 | * @dev: pointer to the device to remove |
306 | */ | |
9dd78466 | 307 | void pnp_remove_card_device(struct pnp_dev *dev) |
1da177e4 LT |
308 | { |
309 | spin_lock(&pnp_lock); | |
310 | dev->card = NULL; | |
311 | list_del(&dev->card_list); | |
312 | spin_unlock(&pnp_lock); | |
313 | __pnp_remove_device(dev); | |
314 | } | |
315 | ||
316 | /** | |
317 | * pnp_request_card_device - Searches for a PnP device under the specified card | |
3d41088f | 318 | * @clink: pointer to the card link, cannot be NULL |
1da177e4 LT |
319 | * @id: pointer to a PnP ID structure that explains the rules for finding the device |
320 | * @from: Starting place to search from. If NULL it will start from the begining. | |
321 | */ | |
9dd78466 BH |
322 | struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, |
323 | const char *id, struct pnp_dev *from) | |
1da177e4 | 324 | { |
9dd78466 BH |
325 | struct list_head *pos; |
326 | struct pnp_dev *dev; | |
327 | struct pnp_card_driver *drv; | |
328 | struct pnp_card *card; | |
07d4e9af | 329 | |
1da177e4 | 330 | if (!clink || !id) |
5bfc43a0 BH |
331 | return NULL; |
332 | ||
1da177e4 LT |
333 | card = clink->card; |
334 | drv = clink->driver; | |
335 | if (!from) { | |
336 | pos = card->devices.next; | |
337 | } else { | |
338 | if (from->card != card) | |
5bfc43a0 | 339 | return NULL; |
1da177e4 LT |
340 | pos = from->card_list.next; |
341 | } | |
342 | while (pos != &card->devices) { | |
343 | dev = card_to_pnp_dev(pos); | |
9dd78466 | 344 | if ((!dev->card_link) && compare_pnp_id(dev->id, id)) |
1da177e4 LT |
345 | goto found; |
346 | pos = pos->next; | |
347 | } | |
348 | ||
1da177e4 LT |
349 | return NULL; |
350 | ||
1e0aa9ad | 351 | found: |
1da177e4 LT |
352 | dev->card_link = clink; |
353 | dev->dev.driver = &drv->link.driver; | |
bfc7ee20 JG |
354 | if (pnp_bus_type.probe(&dev->dev)) |
355 | goto err_out; | |
356 | if (device_bind_driver(&dev->dev)) | |
357 | goto err_out; | |
358 | ||
1da177e4 | 359 | return dev; |
bfc7ee20 | 360 | |
1e0aa9ad | 361 | err_out: |
bfc7ee20 JG |
362 | dev->dev.driver = NULL; |
363 | dev->card_link = NULL; | |
bfc7ee20 | 364 | return NULL; |
1da177e4 LT |
365 | } |
366 | ||
367 | /** | |
368 | * pnp_release_card_device - call this when the driver no longer needs the device | |
369 | * @dev: pointer to the PnP device stucture | |
370 | */ | |
9dd78466 | 371 | void pnp_release_card_device(struct pnp_dev *dev) |
1da177e4 | 372 | { |
9dd78466 | 373 | struct pnp_card_driver *drv = dev->card_link->driver; |
07d4e9af | 374 | |
1da177e4 LT |
375 | drv->link.remove = &card_remove; |
376 | device_release_driver(&dev->dev); | |
377 | drv->link.remove = &card_remove_first; | |
1da177e4 LT |
378 | } |
379 | ||
4c98cfef TI |
380 | /* |
381 | * suspend/resume callbacks | |
382 | */ | |
383 | static int card_suspend(struct pnp_dev *dev, pm_message_t state) | |
384 | { | |
385 | struct pnp_card_link *link = dev->card_link; | |
07d4e9af | 386 | |
4c98cfef TI |
387 | if (link->pm_state.event == state.event) |
388 | return 0; | |
389 | link->pm_state = state; | |
390 | return link->driver->suspend(link, state); | |
391 | } | |
392 | ||
393 | static int card_resume(struct pnp_dev *dev) | |
394 | { | |
395 | struct pnp_card_link *link = dev->card_link; | |
07d4e9af | 396 | |
4c98cfef TI |
397 | if (link->pm_state.event == PM_EVENT_ON) |
398 | return 0; | |
399 | link->pm_state = PMSG_ON; | |
400 | link->driver->resume(link); | |
401 | return 0; | |
402 | } | |
403 | ||
1da177e4 LT |
404 | /** |
405 | * pnp_register_card_driver - registers a PnP card driver with the PnP Layer | |
406 | * @drv: pointer to the driver to register | |
407 | */ | |
9dd78466 | 408 | int pnp_register_card_driver(struct pnp_card_driver *drv) |
1da177e4 | 409 | { |
982c6094 | 410 | int error; |
1da177e4 LT |
411 | struct list_head *pos, *temp; |
412 | ||
413 | drv->link.name = drv->name; | |
414 | drv->link.id_table = NULL; /* this will disable auto matching */ | |
415 | drv->link.flags = drv->flags; | |
416 | drv->link.probe = NULL; | |
417 | drv->link.remove = &card_remove_first; | |
4c98cfef TI |
418 | drv->link.suspend = drv->suspend ? card_suspend : NULL; |
419 | drv->link.resume = drv->resume ? card_resume : NULL; | |
1da177e4 | 420 | |
982c6094 BH |
421 | error = pnp_register_driver(&drv->link); |
422 | if (error < 0) | |
423 | return error; | |
d1d051b2 | 424 | |
1da177e4 LT |
425 | spin_lock(&pnp_lock); |
426 | list_add_tail(&drv->global_list, &pnp_card_drivers); | |
427 | spin_unlock(&pnp_lock); | |
d1d051b2 | 428 | |
9dd78466 BH |
429 | list_for_each_safe(pos, temp, &pnp_cards) { |
430 | struct pnp_card *card = | |
431 | list_entry(pos, struct pnp_card, global_list); | |
432 | card_probe(card, drv); | |
1da177e4 | 433 | } |
982c6094 | 434 | return 0; |
1da177e4 LT |
435 | } |
436 | ||
437 | /** | |
438 | * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer | |
439 | * @drv: pointer to the driver to unregister | |
440 | */ | |
9dd78466 | 441 | void pnp_unregister_card_driver(struct pnp_card_driver *drv) |
1da177e4 LT |
442 | { |
443 | spin_lock(&pnp_lock); | |
444 | list_del(&drv->global_list); | |
445 | spin_unlock(&pnp_lock); | |
446 | pnp_unregister_driver(&drv->link); | |
447 | } | |
448 | ||
1da177e4 LT |
449 | EXPORT_SYMBOL(pnp_request_card_device); |
450 | EXPORT_SYMBOL(pnp_release_card_device); | |
451 | EXPORT_SYMBOL(pnp_register_card_driver); | |
452 | EXPORT_SYMBOL(pnp_unregister_card_driver); |