pnp: make the resource type an unsigned long
[linux-2.6.git] / drivers / pnp / card.c
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
14 LIST_HEAD(pnp_cards);
15 static LIST_HEAD(pnp_card_drivers);
16
17 static 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
51 static void card_remove(struct pnp_dev *dev)
52 {
53         dev->card_link = NULL;
54 }
55
56 static 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
69 static 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  */
105 static 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
134 static 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
147 static 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
155 struct 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         sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
169                 card->number);
170
171         card->dev.coherent_dma_mask = DMA_24BIT_MASK;
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
183 static 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
193 static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
194
195 static 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
209 static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
210
211 static 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
224 err_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  */
233 int 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                 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  */
274 void 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  */
294 int 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         snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%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  */
311 void 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 begining.
325  */
326 struct 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
355 found:
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
365 err_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 stucture
374  */
375 void 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  */
387 static 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
397 static 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  */
412 int 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  */
445 void 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
453 EXPORT_SYMBOL(pnp_request_card_device);
454 EXPORT_SYMBOL(pnp_release_card_device);
455 EXPORT_SYMBOL(pnp_register_card_driver);
456 EXPORT_SYMBOL(pnp_unregister_card_driver);