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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * card.c - contains functions for managing groups of PnP devices
4 *
5 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
6 */
7
8#include <linux/module.h>
9#include <linux/mutex.h>
10#include <linux/ctype.h>
11#include <linux/slab.h>
12#include <linux/pnp.h>
13#include <linux/dma-mapping.h>
14#include "base.h"
15
16LIST_HEAD(pnp_cards);
17static LIST_HEAD(pnp_card_drivers);
18
19static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
20 struct pnp_card *card)
21{
22 const struct pnp_card_device_id *drv_id = drv->id_table;
23
24 while (*drv_id->id) {
25 if (compare_pnp_id(card->id, drv_id->id)) {
26 int i = 0;
27
28 for (;;) {
29 int found;
30 struct pnp_dev *dev;
31
32 if (i == PNP_MAX_DEVICES ||
33 !*drv_id->devs[i].id)
34 return drv_id;
35 found = 0;
36 card_for_each_dev(card, dev) {
37 if (compare_pnp_id(dev->id,
38 drv_id->devs[i].id)) {
39 found = 1;
40 break;
41 }
42 }
43 if (!found)
44 break;
45 i++;
46 }
47 }
48 drv_id++;
49 }
50 return NULL;
51}
52
53static void card_remove(struct pnp_dev *dev)
54{
55 dev->card_link = NULL;
56}
57
58static void card_remove_first(struct pnp_dev *dev)
59{
60 struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
61
62 if (!dev->card || !drv)
63 return;
64 if (drv->remove)
65 drv->remove(dev->card_link);
66 drv->link.remove = &card_remove;
67 kfree(dev->card_link);
68 card_remove(dev);
69}
70
71static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
72{
73 const struct pnp_card_device_id *id;
74 struct pnp_card_link *clink;
75 struct pnp_dev *dev;
76
77 if (!drv->probe)
78 return 0;
79 id = match_card(drv, card);
80 if (!id)
81 return 0;
82
83 clink = kzalloc(sizeof(*clink), GFP_KERNEL);
84 if (!clink)
85 return 0;
86 clink->card = card;
87 clink->driver = drv;
88 clink->pm_state = PMSG_ON;
89
90 if (drv->probe(clink, id) >= 0)
91 return 1;
92
93 /* Recovery */
94 card_for_each_dev(card, dev) {
95 if (dev->card_link == clink)
96 pnp_release_card_device(dev);
97 }
98 kfree(clink);
99 return 0;
100}
101
102/**
103 * pnp_add_card_id - adds an EISA id to the specified card
104 * @id: pointer to a pnp_id structure
105 * @card: pointer to the desired card
106 */
107static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
108{
109 struct pnp_id *dev_id, *ptr;
110
111 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
112 if (!dev_id)
113 return NULL;
114
115 dev_id->id[0] = id[0];
116 dev_id->id[1] = id[1];
117 dev_id->id[2] = id[2];
118 dev_id->id[3] = tolower(id[3]);
119 dev_id->id[4] = tolower(id[4]);
120 dev_id->id[5] = tolower(id[5]);
121 dev_id->id[6] = tolower(id[6]);
122 dev_id->id[7] = '\0';
123
124 dev_id->next = NULL;
125 ptr = card->id;
126 while (ptr && ptr->next)
127 ptr = ptr->next;
128 if (ptr)
129 ptr->next = dev_id;
130 else
131 card->id = dev_id;
132
133 return dev_id;
134}
135
136static void pnp_free_card_ids(struct pnp_card *card)
137{
138 struct pnp_id *id;
139 struct pnp_id *next;
140
141 id = card->id;
142 while (id) {
143 next = id->next;
144 kfree(id);
145 id = next;
146 }
147}
148
149static void pnp_release_card(struct device *dmdev)
150{
151 struct pnp_card *card = to_pnp_card(dmdev);
152
153 pnp_free_card_ids(card);
154 kfree(card);
155}
156
157struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid)
158{
159 struct pnp_card *card;
160 struct pnp_id *dev_id;
161
162 card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL);
163 if (!card)
164 return NULL;
165
166 card->protocol = protocol;
167 card->number = id;
168
169 card->dev.parent = &card->protocol->dev;
170 dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number);
171
172 card->dev.coherent_dma_mask = DMA_BIT_MASK(24);
173 card->dev.dma_mask = &card->dev.coherent_dma_mask;
174
175 dev_id = pnp_add_card_id(card, pnpid);
176 if (!dev_id) {
177 kfree(card);
178 return NULL;
179 }
180
181 return card;
182}
183
184static ssize_t name_show(struct device *dmdev,
185 struct device_attribute *attr, char *buf)
186{
187 char *str = buf;
188 struct pnp_card *card = to_pnp_card(dmdev);
189
190 str += sprintf(str, "%s\n", card->name);
191 return (str - buf);
192}
193
194static DEVICE_ATTR_RO(name);
195
196static ssize_t card_id_show(struct device *dmdev,
197 struct device_attribute *attr, char *buf)
198{
199 char *str = buf;
200 struct pnp_card *card = to_pnp_card(dmdev);
201 struct pnp_id *pos = card->id;
202
203 while (pos) {
204 str += sprintf(str, "%s\n", pos->id);
205 pos = pos->next;
206 }
207 return (str - buf);
208}
209
210static DEVICE_ATTR_RO(card_id);
211
212static int pnp_interface_attach_card(struct pnp_card *card)
213{
214 int rc = device_create_file(&card->dev, &dev_attr_name);
215
216 if (rc)
217 return rc;
218
219 rc = device_create_file(&card->dev, &dev_attr_card_id);
220 if (rc)
221 goto err_name;
222
223 return 0;
224
225err_name:
226 device_remove_file(&card->dev, &dev_attr_name);
227 return rc;
228}
229
230/**
231 * pnp_add_card - adds a PnP card to the PnP Layer
232 * @card: pointer to the card to add
233 */
234int pnp_add_card(struct pnp_card *card)
235{
236 int error;
237 struct list_head *pos, *temp;
238
239 card->dev.bus = NULL;
240 card->dev.release = &pnp_release_card;
241 error = device_register(&card->dev);
242 if (error) {
243 dev_err(&card->dev, "could not register (err=%d)\n", error);
244 put_device(&card->dev);
245 return error;
246 }
247
248 pnp_interface_attach_card(card);
249 mutex_lock(&pnp_lock);
250 list_add_tail(&card->global_list, &pnp_cards);
251 list_add_tail(&card->protocol_list, &card->protocol->cards);
252 mutex_unlock(&pnp_lock);
253
254 /* we wait until now to add devices in order to ensure the drivers
255 * will be able to use all of the related devices on the card
256 * without waiting an unreasonable length of time */
257 list_for_each(pos, &card->devices) {
258 struct pnp_dev *dev = card_to_pnp_dev(pos);
259 __pnp_add_device(dev);
260 }
261
262 /* match with card drivers */
263 list_for_each_safe(pos, temp, &pnp_card_drivers) {
264 struct pnp_card_driver *drv =
265 list_entry(pos, struct pnp_card_driver,
266 global_list);
267 card_probe(card, drv);
268 }
269 return 0;
270}
271
272/**
273 * pnp_remove_card - removes a PnP card from the PnP Layer
274 * @card: pointer to the card to remove
275 */
276void pnp_remove_card(struct pnp_card *card)
277{
278 struct list_head *pos, *temp;
279
280 device_unregister(&card->dev);
281 mutex_lock(&pnp_lock);
282 list_del(&card->global_list);
283 list_del(&card->protocol_list);
284 mutex_unlock(&pnp_lock);
285 list_for_each_safe(pos, temp, &card->devices) {
286 struct pnp_dev *dev = card_to_pnp_dev(pos);
287 pnp_remove_card_device(dev);
288 }
289}
290
291/**
292 * pnp_add_card_device - adds a device to the specified card
293 * @card: pointer to the card to add to
294 * @dev: pointer to the device to add
295 */
296int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
297{
298 dev->dev.parent = &card->dev;
299 dev->card_link = NULL;
300 dev_set_name(&dev->dev, "%02x:%02x.%02x",
301 dev->protocol->number, card->number, dev->number);
302 mutex_lock(&pnp_lock);
303 dev->card = card;
304 list_add_tail(&dev->card_list, &card->devices);
305 mutex_unlock(&pnp_lock);
306 return 0;
307}
308
309/**
310 * pnp_remove_card_device- removes a device from the specified card
311 * @dev: pointer to the device to remove
312 */
313void pnp_remove_card_device(struct pnp_dev *dev)
314{
315 mutex_lock(&pnp_lock);
316 dev->card = NULL;
317 list_del(&dev->card_list);
318 mutex_unlock(&pnp_lock);
319 __pnp_remove_device(dev);
320}
321
322/**
323 * pnp_request_card_device - Searches for a PnP device under the specified card
324 * @clink: pointer to the card link, cannot be NULL
325 * @id: pointer to a PnP ID structure that explains the rules for finding the device
326 * @from: Starting place to search from. If NULL it will start from the beginning.
327 */
328struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
329 const char *id, struct pnp_dev *from)
330{
331 struct list_head *pos;
332 struct pnp_dev *dev;
333 struct pnp_card_driver *drv;
334 struct pnp_card *card;
335
336 if (!clink || !id)
337 return NULL;
338
339 card = clink->card;
340 drv = clink->driver;
341 if (!from) {
342 pos = card->devices.next;
343 } else {
344 if (from->card != card)
345 return NULL;
346 pos = from->card_list.next;
347 }
348 while (pos != &card->devices) {
349 dev = card_to_pnp_dev(pos);
350 if ((!dev->card_link) && compare_pnp_id(dev->id, id))
351 goto found;
352 pos = pos->next;
353 }
354
355 return NULL;
356
357found:
358 dev->card_link = clink;
359 dev->dev.driver = &drv->link.driver;
360 if (pnp_bus_type.probe(&dev->dev))
361 goto err_out;
362 if (device_bind_driver(&dev->dev))
363 goto err_out;
364
365 return dev;
366
367err_out:
368 dev->dev.driver = NULL;
369 dev->card_link = NULL;
370 return NULL;
371}
372EXPORT_SYMBOL(pnp_request_card_device);
373
374/**
375 * pnp_release_card_device - call this when the driver no longer needs the device
376 * @dev: pointer to the PnP device structure
377 */
378void pnp_release_card_device(struct pnp_dev *dev)
379{
380 struct pnp_card_driver *drv = dev->card_link->driver;
381
382 drv->link.remove = &card_remove;
383 device_release_driver(&dev->dev);
384 drv->link.remove = &card_remove_first;
385}
386EXPORT_SYMBOL(pnp_release_card_device);
387
388/*
389 * suspend/resume callbacks
390 */
391static int card_suspend(struct pnp_dev *dev, pm_message_t state)
392{
393 struct pnp_card_link *link = dev->card_link;
394
395 if (link->pm_state.event == state.event)
396 return 0;
397 link->pm_state = state;
398 return link->driver->suspend(link, state);
399}
400
401static int card_resume(struct pnp_dev *dev)
402{
403 struct pnp_card_link *link = dev->card_link;
404
405 if (link->pm_state.event == PM_EVENT_ON)
406 return 0;
407 link->pm_state = PMSG_ON;
408 link->driver->resume(link);
409 return 0;
410}
411
412/**
413 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
414 * @drv: pointer to the driver to register
415 */
416int pnp_register_card_driver(struct pnp_card_driver *drv)
417{
418 int error;
419 struct list_head *pos, *temp;
420
421 drv->link.name = drv->name;
422 drv->link.id_table = NULL; /* this will disable auto matching */
423 drv->link.flags = drv->flags;
424 drv->link.probe = NULL;
425 drv->link.remove = &card_remove_first;
426 drv->link.suspend = drv->suspend ? card_suspend : NULL;
427 drv->link.resume = drv->resume ? card_resume : NULL;
428
429 error = pnp_register_driver(&drv->link);
430 if (error < 0)
431 return error;
432
433 mutex_lock(&pnp_lock);
434 list_add_tail(&drv->global_list, &pnp_card_drivers);
435 mutex_unlock(&pnp_lock);
436
437 list_for_each_safe(pos, temp, &pnp_cards) {
438 struct pnp_card *card =
439 list_entry(pos, struct pnp_card, global_list);
440 card_probe(card, drv);
441 }
442 return 0;
443}
444EXPORT_SYMBOL(pnp_register_card_driver);
445
446/**
447 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
448 * @drv: pointer to the driver to unregister
449 */
450void pnp_unregister_card_driver(struct pnp_card_driver *drv)
451{
452 mutex_lock(&pnp_lock);
453 list_del(&drv->global_list);
454 mutex_unlock(&pnp_lock);
455 pnp_unregister_driver(&drv->link);
456}
457EXPORT_SYMBOL(pnp_unregister_card_driver);
1/*
2 * card.c - contains functions for managing groups of PnP devices
3 *
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
5 */
6
7#include <linux/module.h>
8#include <linux/mutex.h>
9#include <linux/ctype.h>
10#include <linux/slab.h>
11#include <linux/pnp.h>
12#include <linux/dma-mapping.h>
13#include "base.h"
14
15LIST_HEAD(pnp_cards);
16static LIST_HEAD(pnp_card_drivers);
17
18static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
19 struct pnp_card *card)
20{
21 const struct pnp_card_device_id *drv_id = drv->id_table;
22
23 while (*drv_id->id) {
24 if (compare_pnp_id(card->id, drv_id->id)) {
25 int i = 0;
26
27 for (;;) {
28 int found;
29 struct pnp_dev *dev;
30
31 if (i == PNP_MAX_DEVICES ||
32 !*drv_id->devs[i].id)
33 return drv_id;
34 found = 0;
35 card_for_each_dev(card, dev) {
36 if (compare_pnp_id(dev->id,
37 drv_id->devs[i].id)) {
38 found = 1;
39 break;
40 }
41 }
42 if (!found)
43 break;
44 i++;
45 }
46 }
47 drv_id++;
48 }
49 return NULL;
50}
51
52static void card_remove(struct pnp_dev *dev)
53{
54 dev->card_link = NULL;
55}
56
57static void card_remove_first(struct pnp_dev *dev)
58{
59 struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
60
61 if (!dev->card || !drv)
62 return;
63 if (drv->remove)
64 drv->remove(dev->card_link);
65 drv->link.remove = &card_remove;
66 kfree(dev->card_link);
67 card_remove(dev);
68}
69
70static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
71{
72 const struct pnp_card_device_id *id;
73 struct pnp_card_link *clink;
74 struct pnp_dev *dev;
75
76 if (!drv->probe)
77 return 0;
78 id = match_card(drv, card);
79 if (!id)
80 return 0;
81
82 clink = pnp_alloc(sizeof(*clink));
83 if (!clink)
84 return 0;
85 clink->card = card;
86 clink->driver = drv;
87 clink->pm_state = PMSG_ON;
88
89 if (drv->probe(clink, id) >= 0)
90 return 1;
91
92 /* Recovery */
93 card_for_each_dev(card, dev) {
94 if (dev->card_link == clink)
95 pnp_release_card_device(dev);
96 }
97 kfree(clink);
98 return 0;
99}
100
101/**
102 * pnp_add_card_id - adds an EISA id to the specified card
103 * @id: pointer to a pnp_id structure
104 * @card: pointer to the desired card
105 */
106static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
107{
108 struct pnp_id *dev_id, *ptr;
109
110 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
111 if (!dev_id)
112 return NULL;
113
114 dev_id->id[0] = id[0];
115 dev_id->id[1] = id[1];
116 dev_id->id[2] = id[2];
117 dev_id->id[3] = tolower(id[3]);
118 dev_id->id[4] = tolower(id[4]);
119 dev_id->id[5] = tolower(id[5]);
120 dev_id->id[6] = tolower(id[6]);
121 dev_id->id[7] = '\0';
122
123 dev_id->next = NULL;
124 ptr = card->id;
125 while (ptr && ptr->next)
126 ptr = ptr->next;
127 if (ptr)
128 ptr->next = dev_id;
129 else
130 card->id = dev_id;
131
132 return dev_id;
133}
134
135static void pnp_free_card_ids(struct pnp_card *card)
136{
137 struct pnp_id *id;
138 struct pnp_id *next;
139
140 id = card->id;
141 while (id) {
142 next = id->next;
143 kfree(id);
144 id = next;
145 }
146}
147
148static void pnp_release_card(struct device *dmdev)
149{
150 struct pnp_card *card = to_pnp_card(dmdev);
151
152 pnp_free_card_ids(card);
153 kfree(card);
154}
155
156struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid)
157{
158 struct pnp_card *card;
159 struct pnp_id *dev_id;
160
161 card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL);
162 if (!card)
163 return NULL;
164
165 card->protocol = protocol;
166 card->number = id;
167
168 card->dev.parent = &card->protocol->dev;
169 dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number);
170
171 card->dev.coherent_dma_mask = DMA_BIT_MASK(24);
172 card->dev.dma_mask = &card->dev.coherent_dma_mask;
173
174 dev_id = pnp_add_card_id(card, pnpid);
175 if (!dev_id) {
176 kfree(card);
177 return NULL;
178 }
179
180 return card;
181}
182
183static ssize_t pnp_show_card_name(struct device *dmdev,
184 struct device_attribute *attr, char *buf)
185{
186 char *str = buf;
187 struct pnp_card *card = to_pnp_card(dmdev);
188
189 str += sprintf(str, "%s\n", card->name);
190 return (str - buf);
191}
192
193static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
194
195static ssize_t pnp_show_card_ids(struct device *dmdev,
196 struct device_attribute *attr, char *buf)
197{
198 char *str = buf;
199 struct pnp_card *card = to_pnp_card(dmdev);
200 struct pnp_id *pos = card->id;
201
202 while (pos) {
203 str += sprintf(str, "%s\n", pos->id);
204 pos = pos->next;
205 }
206 return (str - buf);
207}
208
209static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
210
211static int pnp_interface_attach_card(struct pnp_card *card)
212{
213 int rc = device_create_file(&card->dev, &dev_attr_name);
214
215 if (rc)
216 return rc;
217
218 rc = device_create_file(&card->dev, &dev_attr_card_id);
219 if (rc)
220 goto err_name;
221
222 return 0;
223
224err_name:
225 device_remove_file(&card->dev, &dev_attr_name);
226 return rc;
227}
228
229/**
230 * pnp_add_card - adds a PnP card to the PnP Layer
231 * @card: pointer to the card to add
232 */
233int pnp_add_card(struct pnp_card *card)
234{
235 int error;
236 struct list_head *pos, *temp;
237
238 card->dev.bus = NULL;
239 card->dev.release = &pnp_release_card;
240 error = device_register(&card->dev);
241 if (error) {
242 dev_err(&card->dev, "could not register (err=%d)\n", error);
243 put_device(&card->dev);
244 return error;
245 }
246
247 pnp_interface_attach_card(card);
248 mutex_lock(&pnp_lock);
249 list_add_tail(&card->global_list, &pnp_cards);
250 list_add_tail(&card->protocol_list, &card->protocol->cards);
251 mutex_unlock(&pnp_lock);
252
253 /* we wait until now to add devices in order to ensure the drivers
254 * will be able to use all of the related devices on the card
255 * without waiting an unreasonable length of time */
256 list_for_each(pos, &card->devices) {
257 struct pnp_dev *dev = card_to_pnp_dev(pos);
258 __pnp_add_device(dev);
259 }
260
261 /* match with card drivers */
262 list_for_each_safe(pos, temp, &pnp_card_drivers) {
263 struct pnp_card_driver *drv =
264 list_entry(pos, struct pnp_card_driver,
265 global_list);
266 card_probe(card, drv);
267 }
268 return 0;
269}
270
271/**
272 * pnp_remove_card - removes a PnP card from the PnP Layer
273 * @card: pointer to the card to remove
274 */
275void pnp_remove_card(struct pnp_card *card)
276{
277 struct list_head *pos, *temp;
278
279 device_unregister(&card->dev);
280 mutex_lock(&pnp_lock);
281 list_del(&card->global_list);
282 list_del(&card->protocol_list);
283 mutex_unlock(&pnp_lock);
284 list_for_each_safe(pos, temp, &card->devices) {
285 struct pnp_dev *dev = card_to_pnp_dev(pos);
286 pnp_remove_card_device(dev);
287 }
288}
289
290/**
291 * pnp_add_card_device - adds a device to the specified card
292 * @card: pointer to the card to add to
293 * @dev: pointer to the device to add
294 */
295int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
296{
297 dev->dev.parent = &card->dev;
298 dev->card_link = NULL;
299 dev_set_name(&dev->dev, "%02x:%02x.%02x",
300 dev->protocol->number, card->number, dev->number);
301 mutex_lock(&pnp_lock);
302 dev->card = card;
303 list_add_tail(&dev->card_list, &card->devices);
304 mutex_unlock(&pnp_lock);
305 return 0;
306}
307
308/**
309 * pnp_remove_card_device- removes a device from the specified card
310 * @dev: pointer to the device to remove
311 */
312void pnp_remove_card_device(struct pnp_dev *dev)
313{
314 mutex_lock(&pnp_lock);
315 dev->card = NULL;
316 list_del(&dev->card_list);
317 mutex_unlock(&pnp_lock);
318 __pnp_remove_device(dev);
319}
320
321/**
322 * pnp_request_card_device - Searches for a PnP device under the specified card
323 * @clink: pointer to the card link, cannot be NULL
324 * @id: pointer to a PnP ID structure that explains the rules for finding the device
325 * @from: Starting place to search from. If NULL it will start from the beginning.
326 */
327struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
328 const char *id, struct pnp_dev *from)
329{
330 struct list_head *pos;
331 struct pnp_dev *dev;
332 struct pnp_card_driver *drv;
333 struct pnp_card *card;
334
335 if (!clink || !id)
336 return NULL;
337
338 card = clink->card;
339 drv = clink->driver;
340 if (!from) {
341 pos = card->devices.next;
342 } else {
343 if (from->card != card)
344 return NULL;
345 pos = from->card_list.next;
346 }
347 while (pos != &card->devices) {
348 dev = card_to_pnp_dev(pos);
349 if ((!dev->card_link) && compare_pnp_id(dev->id, id))
350 goto found;
351 pos = pos->next;
352 }
353
354 return NULL;
355
356found:
357 dev->card_link = clink;
358 dev->dev.driver = &drv->link.driver;
359 if (pnp_bus_type.probe(&dev->dev))
360 goto err_out;
361 if (device_bind_driver(&dev->dev))
362 goto err_out;
363
364 return dev;
365
366err_out:
367 dev->dev.driver = NULL;
368 dev->card_link = NULL;
369 return NULL;
370}
371
372/**
373 * pnp_release_card_device - call this when the driver no longer needs the device
374 * @dev: pointer to the PnP device structure
375 */
376void pnp_release_card_device(struct pnp_dev *dev)
377{
378 struct pnp_card_driver *drv = dev->card_link->driver;
379
380 drv->link.remove = &card_remove;
381 device_release_driver(&dev->dev);
382 drv->link.remove = &card_remove_first;
383}
384
385/*
386 * suspend/resume callbacks
387 */
388static int card_suspend(struct pnp_dev *dev, pm_message_t state)
389{
390 struct pnp_card_link *link = dev->card_link;
391
392 if (link->pm_state.event == state.event)
393 return 0;
394 link->pm_state = state;
395 return link->driver->suspend(link, state);
396}
397
398static int card_resume(struct pnp_dev *dev)
399{
400 struct pnp_card_link *link = dev->card_link;
401
402 if (link->pm_state.event == PM_EVENT_ON)
403 return 0;
404 link->pm_state = PMSG_ON;
405 link->driver->resume(link);
406 return 0;
407}
408
409/**
410 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
411 * @drv: pointer to the driver to register
412 */
413int pnp_register_card_driver(struct pnp_card_driver *drv)
414{
415 int error;
416 struct list_head *pos, *temp;
417
418 drv->link.name = drv->name;
419 drv->link.id_table = NULL; /* this will disable auto matching */
420 drv->link.flags = drv->flags;
421 drv->link.probe = NULL;
422 drv->link.remove = &card_remove_first;
423 drv->link.suspend = drv->suspend ? card_suspend : NULL;
424 drv->link.resume = drv->resume ? card_resume : NULL;
425
426 error = pnp_register_driver(&drv->link);
427 if (error < 0)
428 return error;
429
430 mutex_lock(&pnp_lock);
431 list_add_tail(&drv->global_list, &pnp_card_drivers);
432 mutex_unlock(&pnp_lock);
433
434 list_for_each_safe(pos, temp, &pnp_cards) {
435 struct pnp_card *card =
436 list_entry(pos, struct pnp_card, global_list);
437 card_probe(card, drv);
438 }
439 return 0;
440}
441
442/**
443 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
444 * @drv: pointer to the driver to unregister
445 */
446void pnp_unregister_card_driver(struct pnp_card_driver *drv)
447{
448 mutex_lock(&pnp_lock);
449 list_del(&drv->global_list);
450 mutex_unlock(&pnp_lock);
451 pnp_unregister_driver(&drv->link);
452}
453
454EXPORT_SYMBOL(pnp_request_card_device);
455EXPORT_SYMBOL(pnp_release_card_device);
456EXPORT_SYMBOL(pnp_register_card_driver);
457EXPORT_SYMBOL(pnp_unregister_card_driver);