Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * driver.c - device id matching, driver model, etc. | |
3 | * | |
4 | * Copyright 2002 Adam Belay <ambx1@neo.rr.com> | |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/string.h> |
8 | #include <linux/list.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/ctype.h> | |
11 | #include <linux/slab.h> | |
1da177e4 LT |
12 | #include <linux/pnp.h> |
13 | #include "base.h" | |
14 | ||
15 | static int compare_func(const char *ida, const char *idb) | |
16 | { | |
17 | int i; | |
07d4e9af | 18 | |
1da177e4 | 19 | /* we only need to compare the last 4 chars */ |
9dd78466 | 20 | for (i = 3; i < 7; i++) { |
1da177e4 | 21 | if (ida[i] != 'X' && |
9dd78466 | 22 | idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i])) |
1da177e4 LT |
23 | return 0; |
24 | } | |
25 | return 1; | |
26 | } | |
27 | ||
28 | int compare_pnp_id(struct pnp_id *pos, const char *id) | |
29 | { | |
30 | if (!pos || !id || (strlen(id) != 7)) | |
31 | return 0; | |
9dd78466 | 32 | if (memcmp(id, "ANYDEVS", 7) == 0) |
1da177e4 | 33 | return 1; |
9dd78466 BH |
34 | while (pos) { |
35 | if (memcmp(pos->id, id, 3) == 0) | |
36 | if (compare_func(pos->id, id) == 1) | |
1da177e4 LT |
37 | return 1; |
38 | pos = pos->next; | |
39 | } | |
40 | return 0; | |
41 | } | |
42 | ||
9dd78466 BH |
43 | static const struct pnp_device_id *match_device(struct pnp_driver *drv, |
44 | struct pnp_dev *dev) | |
1da177e4 LT |
45 | { |
46 | const struct pnp_device_id *drv_id = drv->id_table; | |
07d4e9af | 47 | |
1da177e4 LT |
48 | if (!drv_id) |
49 | return NULL; | |
50 | ||
51 | while (*drv_id->id) { | |
52 | if (compare_pnp_id(dev->id, drv_id->id)) | |
53 | return drv_id; | |
54 | drv_id++; | |
55 | } | |
56 | return NULL; | |
57 | } | |
58 | ||
59 | int pnp_device_attach(struct pnp_dev *pnp_dev) | |
60 | { | |
38f6b38d | 61 | mutex_lock(&pnp_lock); |
9dd78466 | 62 | if (pnp_dev->status != PNP_READY) { |
38f6b38d | 63 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
64 | return -EBUSY; |
65 | } | |
66 | pnp_dev->status = PNP_ATTACHED; | |
38f6b38d | 67 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
68 | return 0; |
69 | } | |
70 | ||
71 | void pnp_device_detach(struct pnp_dev *pnp_dev) | |
72 | { | |
38f6b38d | 73 | mutex_lock(&pnp_lock); |
1da177e4 LT |
74 | if (pnp_dev->status == PNP_ATTACHED) |
75 | pnp_dev->status = PNP_READY; | |
38f6b38d | 76 | mutex_unlock(&pnp_lock); |
1da177e4 LT |
77 | pnp_disable_dev(pnp_dev); |
78 | } | |
79 | ||
80 | static int pnp_device_probe(struct device *dev) | |
81 | { | |
82 | int error; | |
83 | struct pnp_driver *pnp_drv; | |
84 | struct pnp_dev *pnp_dev; | |
85 | const struct pnp_device_id *dev_id = NULL; | |
86 | pnp_dev = to_pnp_dev(dev); | |
87 | pnp_drv = to_pnp_driver(dev->driver); | |
88 | ||
1da177e4 LT |
89 | error = pnp_device_attach(pnp_dev); |
90 | if (error < 0) | |
91 | return error; | |
92 | ||
93 | if (pnp_dev->active == 0) { | |
94 | if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) { | |
95 | error = pnp_activate_dev(pnp_dev); | |
96 | if (error < 0) | |
97 | return error; | |
98 | } | |
99 | } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE) | |
9dd78466 | 100 | == PNP_DRIVER_RES_DISABLE) { |
1da177e4 LT |
101 | error = pnp_disable_dev(pnp_dev); |
102 | if (error < 0) | |
103 | return error; | |
104 | } | |
105 | error = 0; | |
106 | if (pnp_drv->probe) { | |
107 | dev_id = match_device(pnp_drv, pnp_dev); | |
108 | if (dev_id != NULL) | |
109 | error = pnp_drv->probe(pnp_dev, dev_id); | |
110 | } | |
9dd78466 | 111 | if (error >= 0) { |
1da177e4 LT |
112 | pnp_dev->driver = pnp_drv; |
113 | error = 0; | |
114 | } else | |
115 | goto fail; | |
a05d0781 | 116 | |
1da177e4 LT |
117 | return error; |
118 | ||
1e0aa9ad | 119 | fail: |
1da177e4 LT |
120 | pnp_device_detach(pnp_dev); |
121 | return error; | |
122 | } | |
123 | ||
124 | static int pnp_device_remove(struct device *dev) | |
125 | { | |
9dd78466 BH |
126 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
127 | struct pnp_driver *drv = pnp_dev->driver; | |
1da177e4 LT |
128 | |
129 | if (drv) { | |
130 | if (drv->remove) | |
131 | drv->remove(pnp_dev); | |
132 | pnp_dev->driver = NULL; | |
133 | } | |
134 | pnp_device_detach(pnp_dev); | |
135 | return 0; | |
136 | } | |
137 | ||
abd6633c DH |
138 | static void pnp_device_shutdown(struct device *dev) |
139 | { | |
140 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); | |
141 | struct pnp_driver *drv = pnp_dev->driver; | |
142 | ||
143 | if (drv && drv->shutdown) | |
144 | drv->shutdown(pnp_dev); | |
145 | } | |
146 | ||
1da177e4 LT |
147 | static int pnp_bus_match(struct device *dev, struct device_driver *drv) |
148 | { | |
9dd78466 BH |
149 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
150 | struct pnp_driver *pnp_drv = to_pnp_driver(drv); | |
07d4e9af | 151 | |
1da177e4 LT |
152 | if (match_device(pnp_drv, pnp_dev) == NULL) |
153 | return 0; | |
154 | return 1; | |
155 | } | |
156 | ||
eaf140b6 | 157 | static int __pnp_bus_suspend(struct device *dev, pm_message_t state) |
4c98cfef | 158 | { |
9dd78466 BH |
159 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
160 | struct pnp_driver *pnp_drv = pnp_dev->driver; | |
68094e32 PO |
161 | int error; |
162 | ||
163 | if (!pnp_drv) | |
164 | return 0; | |
165 | ||
729377d5 SK |
166 | if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) { |
167 | error = pnp_drv->driver.pm->suspend(dev); | |
168 | suspend_report_result(pnp_drv->driver.pm->suspend, error); | |
169 | if (error) | |
170 | return error; | |
171 | } | |
172 | ||
68094e32 PO |
173 | if (pnp_drv->suspend) { |
174 | error = pnp_drv->suspend(pnp_dev, state); | |
175 | if (error) | |
176 | return error; | |
177 | } | |
178 | ||
5d38998e | 179 | if (pnp_can_disable(pnp_dev)) { |
9dd78466 BH |
180 | error = pnp_stop_dev(pnp_dev); |
181 | if (error) | |
182 | return error; | |
68094e32 | 183 | } |
4c98cfef | 184 | |
01395d79 | 185 | if (pnp_can_suspend(pnp_dev)) |
fc30e68e | 186 | pnp_dev->protocol->suspend(pnp_dev, state); |
4c98cfef TI |
187 | return 0; |
188 | } | |
189 | ||
eaf140b6 SK |
190 | static int pnp_bus_suspend(struct device *dev) |
191 | { | |
192 | return __pnp_bus_suspend(dev, PMSG_SUSPEND); | |
193 | } | |
194 | ||
195 | static int pnp_bus_freeze(struct device *dev) | |
196 | { | |
197 | return __pnp_bus_suspend(dev, PMSG_FREEZE); | |
198 | } | |
199 | ||
8a37ea50 DT |
200 | static int pnp_bus_poweroff(struct device *dev) |
201 | { | |
202 | return __pnp_bus_suspend(dev, PMSG_HIBERNATE); | |
203 | } | |
204 | ||
68094e32 | 205 | static int pnp_bus_resume(struct device *dev) |
4c98cfef | 206 | { |
9dd78466 BH |
207 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
208 | struct pnp_driver *pnp_drv = pnp_dev->driver; | |
68094e32 PO |
209 | int error; |
210 | ||
211 | if (!pnp_drv) | |
212 | return 0; | |
213 | ||
cc8e7a35 RW |
214 | if (pnp_dev->protocol->resume) { |
215 | error = pnp_dev->protocol->resume(pnp_dev); | |
216 | if (error) | |
217 | return error; | |
218 | } | |
fc30e68e | 219 | |
5d38998e | 220 | if (pnp_can_write(pnp_dev)) { |
68094e32 PO |
221 | error = pnp_start_dev(pnp_dev); |
222 | if (error) | |
223 | return error; | |
224 | } | |
4c98cfef | 225 | |
729377d5 SK |
226 | if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) { |
227 | error = pnp_drv->driver.pm->resume(dev); | |
228 | if (error) | |
229 | return error; | |
230 | } | |
231 | ||
5d38998e RH |
232 | if (pnp_drv->resume) { |
233 | error = pnp_drv->resume(pnp_dev); | |
234 | if (error) | |
235 | return error; | |
236 | } | |
68094e32 PO |
237 | |
238 | return 0; | |
4c98cfef | 239 | } |
1da177e4 | 240 | |
eaf140b6 | 241 | static const struct dev_pm_ops pnp_bus_dev_pm_ops = { |
8a37ea50 | 242 | /* Suspend callbacks */ |
eaf140b6 | 243 | .suspend = pnp_bus_suspend, |
eaf140b6 | 244 | .resume = pnp_bus_resume, |
8a37ea50 DT |
245 | /* Hibernate callbacks */ |
246 | .freeze = pnp_bus_freeze, | |
247 | .thaw = pnp_bus_resume, | |
248 | .poweroff = pnp_bus_poweroff, | |
249 | .restore = pnp_bus_resume, | |
eaf140b6 SK |
250 | }; |
251 | ||
1da177e4 | 252 | struct bus_type pnp_bus_type = { |
07d4e9af BH |
253 | .name = "pnp", |
254 | .match = pnp_bus_match, | |
255 | .probe = pnp_device_probe, | |
256 | .remove = pnp_device_remove, | |
abd6633c | 257 | .shutdown = pnp_device_shutdown, |
eaf140b6 | 258 | .pm = &pnp_bus_dev_pm_ops, |
2df43901 | 259 | .dev_groups = pnp_dev_groups, |
1da177e4 LT |
260 | }; |
261 | ||
1da177e4 LT |
262 | int pnp_register_driver(struct pnp_driver *drv) |
263 | { | |
1da177e4 LT |
264 | drv->driver.name = drv->name; |
265 | drv->driver.bus = &pnp_bus_type; | |
1da177e4 | 266 | |
982c6094 | 267 | return driver_register(&drv->driver); |
1da177e4 LT |
268 | } |
269 | ||
270 | void pnp_unregister_driver(struct pnp_driver *drv) | |
271 | { | |
272 | driver_unregister(&drv->driver); | |
1da177e4 LT |
273 | } |
274 | ||
275 | /** | |
276 | * pnp_add_id - adds an EISA id to the specified device | |
1da177e4 | 277 | * @dev: pointer to the desired device |
772defc6 | 278 | * @id: pointer to an EISA id string |
1da177e4 | 279 | */ |
620e112c | 280 | struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id) |
1da177e4 | 281 | { |
772defc6 | 282 | struct pnp_id *dev_id, *ptr; |
07d4e9af | 283 | |
772defc6 BH |
284 | dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
285 | if (!dev_id) | |
286 | return NULL; | |
287 | ||
288 | dev_id->id[0] = id[0]; | |
289 | dev_id->id[1] = id[1]; | |
290 | dev_id->id[2] = id[2]; | |
291 | dev_id->id[3] = tolower(id[3]); | |
292 | dev_id->id[4] = tolower(id[4]); | |
293 | dev_id->id[5] = tolower(id[5]); | |
294 | dev_id->id[6] = tolower(id[6]); | |
295 | dev_id->id[7] = '\0'; | |
296 | ||
297 | dev_id->next = NULL; | |
1da177e4 LT |
298 | ptr = dev->id; |
299 | while (ptr && ptr->next) | |
300 | ptr = ptr->next; | |
301 | if (ptr) | |
772defc6 | 302 | ptr->next = dev_id; |
1da177e4 | 303 | else |
772defc6 BH |
304 | dev->id = dev_id; |
305 | ||
306 | return dev_id; | |
1da177e4 LT |
307 | } |
308 | ||
309 | EXPORT_SYMBOL(pnp_register_driver); | |
310 | EXPORT_SYMBOL(pnp_unregister_driver); | |
1da177e4 LT |
311 | EXPORT_SYMBOL(pnp_device_attach); |
312 | EXPORT_SYMBOL(pnp_device_detach); |