dma-mapping: replace all DMA_28BIT_MASK macro with DMA_BIT_MASK(28)
[linux-2.6-block.git] / drivers / pnp / card.c
CommitLineData
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 10#include <linux/pnp.h>
e86b19ce 11#include <linux/dma-mapping.h>
1da177e4
LT
12#include "base.h"
13
14LIST_HEAD(pnp_cards);
b449f63c 15static LIST_HEAD(pnp_card_drivers);
1da177e4 16
9dd78466
BH
17static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
18 struct pnp_card *card)
1da177e4 19{
9dd78466 20 const struct pnp_card_device_id *drv_id = drv->id_table;
07d4e9af 21
9dd78466
BH
22 while (*drv_id->id) {
23 if (compare_pnp_id(card->id, drv_id->id)) {
1da177e4 24 int i = 0;
07d4e9af 25
1da177e4
LT
26 for (;;) {
27 int found;
28 struct pnp_dev *dev;
07d4e9af 29
1e0aa9ad
BH
30 if (i == PNP_MAX_DEVICES ||
31 !*drv_id->devs[i].id)
1da177e4
LT
32 return drv_id;
33 found = 0;
34 card_for_each_dev(card, dev) {
1e0aa9ad
BH
35 if (compare_pnp_id(dev->id,
36 drv_id->devs[i].id)) {
1da177e4
LT
37 found = 1;
38 break;
39 }
40 }
9dd78466 41 if (!found)
1da177e4
LT
42 break;
43 i++;
44 }
45 }
46 drv_id++;
47 }
48 return NULL;
49}
50
9dd78466 51static void card_remove(struct pnp_dev *dev)
1da177e4
LT
52{
53 dev->card_link = NULL;
54}
982c6094 55
9dd78466 56static void card_remove_first(struct pnp_dev *dev)
1da177e4 57{
9dd78466 58 struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
07d4e9af 59
1da177e4
LT
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
a9adb8db 69static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
1da177e4 70{
a9adb8db
JJ
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;
9dd78466 77 id = match_card(drv, card);
a9adb8db
JJ
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);
1da177e4 95 }
a9adb8db 96 kfree(clink);
1da177e4
LT
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
1da177e4 104 */
25cdcd00 105static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
1da177e4 106{
e436675f
BH
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;
1da177e4
LT
123 ptr = card->id;
124 while (ptr && ptr->next)
125 ptr = ptr->next;
126 if (ptr)
e436675f 127 ptr->next = dev_id;
1da177e4 128 else
e436675f
BH
129 card->id = dev_id;
130
131 return dev_id;
1da177e4
LT
132}
133
9dd78466 134static void pnp_free_card_ids(struct pnp_card *card)
1da177e4 135{
9dd78466 136 struct pnp_id *id;
1da177e4 137 struct pnp_id *next;
07d4e9af 138
1da177e4
LT
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{
9dd78466 149 struct pnp_card *card = to_pnp_card(dmdev);
07d4e9af 150
1da177e4
LT
151 pnp_free_card_ids(card);
152 kfree(card);
153}
154
6bf2aab2
BH
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;
c85e37c5 168 dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number);
6bf2aab2 169
e86b19ce
RH
170 card->dev.coherent_dma_mask = DMA_24BIT_MASK;
171 card->dev.dma_mask = &card->dev.coherent_dma_mask;
172
6bf2aab2
BH
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
9dd78466
BH
182static ssize_t pnp_show_card_name(struct device *dmdev,
183 struct device_attribute *attr, char *buf)
1da177e4
LT
184{
185 char *str = buf;
186 struct pnp_card *card = to_pnp_card(dmdev);
07d4e9af 187
9dd78466 188 str += sprintf(str, "%s\n", card->name);
1da177e4
LT
189 return (str - buf);
190}
191
9dd78466 192static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
1da177e4 193
9dd78466
BH
194static ssize_t pnp_show_card_ids(struct device *dmdev,
195 struct device_attribute *attr, char *buf)
1da177e4
LT
196{
197 char *str = buf;
198 struct pnp_card *card = to_pnp_card(dmdev);
9dd78466 199 struct pnp_id *pos = card->id;
1da177e4
LT
200
201 while (pos) {
9dd78466 202 str += sprintf(str, "%s\n", pos->id);
1da177e4
LT
203 pos = pos->next;
204 }
205 return (str - buf);
206}
207
9dd78466 208static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
1da177e4
LT
209
210static int pnp_interface_attach_card(struct pnp_card *card)
211{
9dd78466 212 int rc = device_create_file(&card->dev, &dev_attr_name);
07d4e9af 213
9dd78466
BH
214 if (rc)
215 return rc;
bfc7ee20 216
9dd78466
BH
217 rc = device_create_file(&card->dev, &dev_attr_card_id);
218 if (rc)
219 goto err_name;
bfc7ee20 220
1da177e4 221 return 0;
bfc7ee20 222
1e0aa9ad 223err_name:
9dd78466 224 device_remove_file(&card->dev, &dev_attr_name);
bfc7ee20 225 return rc;
1da177e4
LT
226}
227
228/**
229 * pnp_add_card - adds a PnP card to the PnP Layer
230 * @card: pointer to the card to add
231 */
9dd78466 232int pnp_add_card(struct pnp_card *card)
1da177e4
LT
233{
234 int error;
9dd78466 235 struct list_head *pos, *temp;
07d4e9af 236
1da177e4
LT
237 card->dev.bus = NULL;
238 card->dev.release = &pnp_release_card;
239 error = device_register(&card->dev);
5bfc43a0 240 if (error) {
a05d0781 241 dev_err(&card->dev, "could not register (err=%d)\n", error);
5bfc43a0
BH
242 return error;
243 }
244
245 pnp_interface_attach_card(card);
246 spin_lock(&pnp_lock);
247 list_add_tail(&card->global_list, &pnp_cards);
248 list_add_tail(&card->protocol_list, &card->protocol->cards);
249 spin_unlock(&pnp_lock);
250
251 /* we wait until now to add devices in order to ensure the drivers
252 * will be able to use all of the related devices on the card
253 * without waiting an unreasonable length of time */
254 list_for_each(pos, &card->devices) {
255 struct pnp_dev *dev = card_to_pnp_dev(pos);
256 __pnp_add_device(dev);
257 }
258
259 /* match with card drivers */
260 list_for_each_safe(pos, temp, &pnp_card_drivers) {
261 struct pnp_card_driver *drv =
262 list_entry(pos, struct pnp_card_driver,
263 global_list);
264 card_probe(card, drv);
265 }
266 return 0;
1da177e4
LT
267}
268
269/**
270 * pnp_remove_card - removes a PnP card from the PnP Layer
271 * @card: pointer to the card to remove
272 */
9dd78466 273void pnp_remove_card(struct pnp_card *card)
1da177e4
LT
274{
275 struct list_head *pos, *temp;
07d4e9af 276
1da177e4
LT
277 device_unregister(&card->dev);
278 spin_lock(&pnp_lock);
279 list_del(&card->global_list);
280 list_del(&card->protocol_list);
281 spin_unlock(&pnp_lock);
9dd78466 282 list_for_each_safe(pos, temp, &card->devices) {
1da177e4
LT
283 struct pnp_dev *dev = card_to_pnp_dev(pos);
284 pnp_remove_card_device(dev);
285 }
286}
287
288/**
289 * pnp_add_card_device - adds a device to the specified card
290 * @card: pointer to the card to add to
291 * @dev: pointer to the device to add
292 */
9dd78466 293int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
1da177e4 294{
1da177e4
LT
295 dev->dev.parent = &card->dev;
296 dev->card_link = NULL;
c85e37c5
KS
297 dev_set_name(&dev->dev, "%02x:%02x.%02x",
298 dev->protocol->number, card->number, dev->number);
1da177e4
LT
299 spin_lock(&pnp_lock);
300 dev->card = card;
301 list_add_tail(&dev->card_list, &card->devices);
302 spin_unlock(&pnp_lock);
303 return 0;
304}
305
306/**
307 * pnp_remove_card_device- removes a device from the specified card
1da177e4
LT
308 * @dev: pointer to the device to remove
309 */
9dd78466 310void pnp_remove_card_device(struct pnp_dev *dev)
1da177e4
LT
311{
312 spin_lock(&pnp_lock);
313 dev->card = NULL;
314 list_del(&dev->card_list);
315 spin_unlock(&pnp_lock);
316 __pnp_remove_device(dev);
317}
318
319/**
320 * pnp_request_card_device - Searches for a PnP device under the specified card
3d41088f 321 * @clink: pointer to the card link, cannot be NULL
1da177e4
LT
322 * @id: pointer to a PnP ID structure that explains the rules for finding the device
323 * @from: Starting place to search from. If NULL it will start from the begining.
324 */
9dd78466
BH
325struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
326 const char *id, struct pnp_dev *from)
1da177e4 327{
9dd78466
BH
328 struct list_head *pos;
329 struct pnp_dev *dev;
330 struct pnp_card_driver *drv;
331 struct pnp_card *card;
07d4e9af 332
1da177e4 333 if (!clink || !id)
5bfc43a0
BH
334 return NULL;
335
1da177e4
LT
336 card = clink->card;
337 drv = clink->driver;
338 if (!from) {
339 pos = card->devices.next;
340 } else {
341 if (from->card != card)
5bfc43a0 342 return NULL;
1da177e4
LT
343 pos = from->card_list.next;
344 }
345 while (pos != &card->devices) {
346 dev = card_to_pnp_dev(pos);
9dd78466 347 if ((!dev->card_link) && compare_pnp_id(dev->id, id))
1da177e4
LT
348 goto found;
349 pos = pos->next;
350 }
351
1da177e4
LT
352 return NULL;
353
1e0aa9ad 354found:
1da177e4
LT
355 dev->card_link = clink;
356 dev->dev.driver = &drv->link.driver;
bfc7ee20
JG
357 if (pnp_bus_type.probe(&dev->dev))
358 goto err_out;
359 if (device_bind_driver(&dev->dev))
360 goto err_out;
361
1da177e4 362 return dev;
bfc7ee20 363
1e0aa9ad 364err_out:
bfc7ee20
JG
365 dev->dev.driver = NULL;
366 dev->card_link = NULL;
bfc7ee20 367 return NULL;
1da177e4
LT
368}
369
370/**
371 * pnp_release_card_device - call this when the driver no longer needs the device
372 * @dev: pointer to the PnP device stucture
373 */
9dd78466 374void pnp_release_card_device(struct pnp_dev *dev)
1da177e4 375{
9dd78466 376 struct pnp_card_driver *drv = dev->card_link->driver;
07d4e9af 377
1da177e4
LT
378 drv->link.remove = &card_remove;
379 device_release_driver(&dev->dev);
380 drv->link.remove = &card_remove_first;
1da177e4
LT
381}
382
4c98cfef
TI
383/*
384 * suspend/resume callbacks
385 */
386static int card_suspend(struct pnp_dev *dev, pm_message_t state)
387{
388 struct pnp_card_link *link = dev->card_link;
07d4e9af 389
4c98cfef
TI
390 if (link->pm_state.event == state.event)
391 return 0;
392 link->pm_state = state;
393 return link->driver->suspend(link, state);
394}
395
396static int card_resume(struct pnp_dev *dev)
397{
398 struct pnp_card_link *link = dev->card_link;
07d4e9af 399
4c98cfef
TI
400 if (link->pm_state.event == PM_EVENT_ON)
401 return 0;
402 link->pm_state = PMSG_ON;
403 link->driver->resume(link);
404 return 0;
405}
406
1da177e4
LT
407/**
408 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
409 * @drv: pointer to the driver to register
410 */
9dd78466 411int pnp_register_card_driver(struct pnp_card_driver *drv)
1da177e4 412{
982c6094 413 int error;
1da177e4
LT
414 struct list_head *pos, *temp;
415
416 drv->link.name = drv->name;
417 drv->link.id_table = NULL; /* this will disable auto matching */
418 drv->link.flags = drv->flags;
419 drv->link.probe = NULL;
420 drv->link.remove = &card_remove_first;
4c98cfef
TI
421 drv->link.suspend = drv->suspend ? card_suspend : NULL;
422 drv->link.resume = drv->resume ? card_resume : NULL;
1da177e4 423
982c6094
BH
424 error = pnp_register_driver(&drv->link);
425 if (error < 0)
426 return error;
d1d051b2 427
1da177e4
LT
428 spin_lock(&pnp_lock);
429 list_add_tail(&drv->global_list, &pnp_card_drivers);
430 spin_unlock(&pnp_lock);
d1d051b2 431
9dd78466
BH
432 list_for_each_safe(pos, temp, &pnp_cards) {
433 struct pnp_card *card =
434 list_entry(pos, struct pnp_card, global_list);
435 card_probe(card, drv);
1da177e4 436 }
982c6094 437 return 0;
1da177e4
LT
438}
439
440/**
441 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
442 * @drv: pointer to the driver to unregister
443 */
9dd78466 444void pnp_unregister_card_driver(struct pnp_card_driver *drv)
1da177e4
LT
445{
446 spin_lock(&pnp_lock);
447 list_del(&drv->global_list);
448 spin_unlock(&pnp_lock);
449 pnp_unregister_driver(&drv->link);
450}
451
1da177e4
LT
452EXPORT_SYMBOL(pnp_request_card_device);
453EXPORT_SYMBOL(pnp_release_card_device);
454EXPORT_SYMBOL(pnp_register_card_driver);
455EXPORT_SYMBOL(pnp_unregister_card_driver);