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