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1/*
2 * driver.c - device id matching, driver model, etc.
3 *
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
5 */
6
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>
12#include <linux/pnp.h>
13#include "base.h"
14
15static int compare_func(const char *ida, const char *idb)
16{
17 int i;
18
19 /* we only need to compare the last 4 chars */
20 for (i = 3; i < 7; i++) {
21 if (ida[i] != 'X' &&
22 idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
23 return 0;
24 }
25 return 1;
26}
27
28int compare_pnp_id(struct pnp_id *pos, const char *id)
29{
30 if (!pos || !id || (strlen(id) != 7))
31 return 0;
32 if (memcmp(id, "ANYDEVS", 7) == 0)
33 return 1;
34 while (pos) {
35 if (memcmp(pos->id, id, 3) == 0)
36 if (compare_func(pos->id, id) == 1)
37 return 1;
38 pos = pos->next;
39 }
40 return 0;
41}
42
43static const struct pnp_device_id *match_device(struct pnp_driver *drv,
44 struct pnp_dev *dev)
45{
46 const struct pnp_device_id *drv_id = drv->id_table;
47
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
59int pnp_device_attach(struct pnp_dev *pnp_dev)
60{
61 spin_lock(&pnp_lock);
62 if (pnp_dev->status != PNP_READY) {
63 spin_unlock(&pnp_lock);
64 return -EBUSY;
65 }
66 pnp_dev->status = PNP_ATTACHED;
67 spin_unlock(&pnp_lock);
68 return 0;
69}
70
71void pnp_device_detach(struct pnp_dev *pnp_dev)
72{
73 spin_lock(&pnp_lock);
74 if (pnp_dev->status == PNP_ATTACHED)
75 pnp_dev->status = PNP_READY;
76 spin_unlock(&pnp_lock);
77 pnp_disable_dev(pnp_dev);
78}
79
80static 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
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)
100 == PNP_DRIVER_RES_DISABLE) {
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 }
111 if (error >= 0) {
112 pnp_dev->driver = pnp_drv;
113 error = 0;
114 } else
115 goto fail;
116
117 return error;
118
119fail:
120 pnp_device_detach(pnp_dev);
121 return error;
122}
123
124static int pnp_device_remove(struct device *dev)
125{
126 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
127 struct pnp_driver *drv = pnp_dev->driver;
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
138static 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
147static int pnp_bus_match(struct device *dev, struct device_driver *drv)
148{
149 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
150 struct pnp_driver *pnp_drv = to_pnp_driver(drv);
151
152 if (match_device(pnp_drv, pnp_dev) == NULL)
153 return 0;
154 return 1;
155}
156
157static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
158{
159 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
160 struct pnp_driver *pnp_drv = pnp_dev->driver;
161 int error;
162
163 if (!pnp_drv)
164 return 0;
165
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
173 if (pnp_drv->suspend) {
174 error = pnp_drv->suspend(pnp_dev, state);
175 if (error)
176 return error;
177 }
178
179 if (pnp_can_disable(pnp_dev)) {
180 error = pnp_stop_dev(pnp_dev);
181 if (error)
182 return error;
183 }
184
185 if (pnp_dev->protocol->suspend)
186 pnp_dev->protocol->suspend(pnp_dev, state);
187 return 0;
188}
189
190static int pnp_bus_suspend(struct device *dev)
191{
192 return __pnp_bus_suspend(dev, PMSG_SUSPEND);
193}
194
195static int pnp_bus_freeze(struct device *dev)
196{
197 return __pnp_bus_suspend(dev, PMSG_FREEZE);
198}
199
200static int pnp_bus_poweroff(struct device *dev)
201{
202 return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
203}
204
205static int pnp_bus_resume(struct device *dev)
206{
207 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
208 struct pnp_driver *pnp_drv = pnp_dev->driver;
209 int error;
210
211 if (!pnp_drv)
212 return 0;
213
214 if (pnp_dev->protocol->resume) {
215 error = pnp_dev->protocol->resume(pnp_dev);
216 if (error)
217 return error;
218 }
219
220 if (pnp_can_write(pnp_dev)) {
221 error = pnp_start_dev(pnp_dev);
222 if (error)
223 return error;
224 }
225
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
232 if (pnp_drv->resume) {
233 error = pnp_drv->resume(pnp_dev);
234 if (error)
235 return error;
236 }
237
238 return 0;
239}
240
241static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
242 /* Suspend callbacks */
243 .suspend = pnp_bus_suspend,
244 .resume = pnp_bus_resume,
245 /* Hibernate callbacks */
246 .freeze = pnp_bus_freeze,
247 .thaw = pnp_bus_resume,
248 .poweroff = pnp_bus_poweroff,
249 .restore = pnp_bus_resume,
250};
251
252struct bus_type pnp_bus_type = {
253 .name = "pnp",
254 .match = pnp_bus_match,
255 .probe = pnp_device_probe,
256 .remove = pnp_device_remove,
257 .shutdown = pnp_device_shutdown,
258 .pm = &pnp_bus_dev_pm_ops,
259 .dev_groups = pnp_dev_groups,
260};
261
262int pnp_register_driver(struct pnp_driver *drv)
263{
264 drv->driver.name = drv->name;
265 drv->driver.bus = &pnp_bus_type;
266
267 return driver_register(&drv->driver);
268}
269
270void pnp_unregister_driver(struct pnp_driver *drv)
271{
272 driver_unregister(&drv->driver);
273}
274
275/**
276 * pnp_add_id - adds an EISA id to the specified device
277 * @dev: pointer to the desired device
278 * @id: pointer to an EISA id string
279 */
280struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
281{
282 struct pnp_id *dev_id, *ptr;
283
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;
298 ptr = dev->id;
299 while (ptr && ptr->next)
300 ptr = ptr->next;
301 if (ptr)
302 ptr->next = dev_id;
303 else
304 dev->id = dev_id;
305
306 return dev_id;
307}
308
309EXPORT_SYMBOL(pnp_register_driver);
310EXPORT_SYMBOL(pnp_unregister_driver);
311EXPORT_SYMBOL(pnp_device_attach);
312EXPORT_SYMBOL(pnp_device_detach);
1/*
2 * driver.c - device id matching, driver model, etc.
3 *
4 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
5 */
6
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>
12#include <linux/pnp.h>
13#include "base.h"
14
15static int compare_func(const char *ida, const char *idb)
16{
17 int i;
18
19 /* we only need to compare the last 4 chars */
20 for (i = 3; i < 7; i++) {
21 if (ida[i] != 'X' &&
22 idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
23 return 0;
24 }
25 return 1;
26}
27
28int compare_pnp_id(struct pnp_id *pos, const char *id)
29{
30 if (!pos || !id || (strlen(id) != 7))
31 return 0;
32 if (memcmp(id, "ANYDEVS", 7) == 0)
33 return 1;
34 while (pos) {
35 if (memcmp(pos->id, id, 3) == 0)
36 if (compare_func(pos->id, id) == 1)
37 return 1;
38 pos = pos->next;
39 }
40 return 0;
41}
42
43static const struct pnp_device_id *match_device(struct pnp_driver *drv,
44 struct pnp_dev *dev)
45{
46 const struct pnp_device_id *drv_id = drv->id_table;
47
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
59int pnp_device_attach(struct pnp_dev *pnp_dev)
60{
61 mutex_lock(&pnp_lock);
62 if (pnp_dev->status != PNP_READY) {
63 mutex_unlock(&pnp_lock);
64 return -EBUSY;
65 }
66 pnp_dev->status = PNP_ATTACHED;
67 mutex_unlock(&pnp_lock);
68 return 0;
69}
70
71void pnp_device_detach(struct pnp_dev *pnp_dev)
72{
73 mutex_lock(&pnp_lock);
74 if (pnp_dev->status == PNP_ATTACHED)
75 pnp_dev->status = PNP_READY;
76 mutex_unlock(&pnp_lock);
77}
78
79static int pnp_device_probe(struct device *dev)
80{
81 int error;
82 struct pnp_driver *pnp_drv;
83 struct pnp_dev *pnp_dev;
84 const struct pnp_device_id *dev_id = NULL;
85 pnp_dev = to_pnp_dev(dev);
86 pnp_drv = to_pnp_driver(dev->driver);
87
88 error = pnp_device_attach(pnp_dev);
89 if (error < 0)
90 return error;
91
92 if (pnp_dev->active == 0) {
93 if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
94 error = pnp_activate_dev(pnp_dev);
95 if (error < 0)
96 return error;
97 }
98 } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
99 == PNP_DRIVER_RES_DISABLE) {
100 error = pnp_disable_dev(pnp_dev);
101 if (error < 0)
102 return error;
103 }
104 error = 0;
105 if (pnp_drv->probe) {
106 dev_id = match_device(pnp_drv, pnp_dev);
107 if (dev_id != NULL)
108 error = pnp_drv->probe(pnp_dev, dev_id);
109 }
110 if (error >= 0) {
111 pnp_dev->driver = pnp_drv;
112 error = 0;
113 } else
114 goto fail;
115
116 return error;
117
118fail:
119 pnp_device_detach(pnp_dev);
120 return error;
121}
122
123static int pnp_device_remove(struct device *dev)
124{
125 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
126 struct pnp_driver *drv = pnp_dev->driver;
127
128 if (drv) {
129 if (drv->remove)
130 drv->remove(pnp_dev);
131 pnp_dev->driver = NULL;
132 }
133
134 if (pnp_dev->active &&
135 (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))
136 pnp_disable_dev(pnp_dev);
137
138 pnp_device_detach(pnp_dev);
139 return 0;
140}
141
142static void pnp_device_shutdown(struct device *dev)
143{
144 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
145 struct pnp_driver *drv = pnp_dev->driver;
146
147 if (drv && drv->shutdown)
148 drv->shutdown(pnp_dev);
149}
150
151static int pnp_bus_match(struct device *dev, struct device_driver *drv)
152{
153 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
154 struct pnp_driver *pnp_drv = to_pnp_driver(drv);
155
156 if (match_device(pnp_drv, pnp_dev) == NULL)
157 return 0;
158 return 1;
159}
160
161static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
162{
163 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
164 struct pnp_driver *pnp_drv = pnp_dev->driver;
165 int error;
166
167 if (!pnp_drv)
168 return 0;
169
170 if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
171 error = pnp_drv->driver.pm->suspend(dev);
172 suspend_report_result(pnp_drv->driver.pm->suspend, error);
173 if (error)
174 return error;
175 }
176
177 if (pnp_drv->suspend) {
178 error = pnp_drv->suspend(pnp_dev, state);
179 if (error)
180 return error;
181 }
182
183 if (pnp_can_disable(pnp_dev)) {
184 error = pnp_stop_dev(pnp_dev);
185 if (error)
186 return error;
187 }
188
189 if (pnp_can_suspend(pnp_dev))
190 pnp_dev->protocol->suspend(pnp_dev, state);
191 return 0;
192}
193
194static int pnp_bus_suspend(struct device *dev)
195{
196 return __pnp_bus_suspend(dev, PMSG_SUSPEND);
197}
198
199static int pnp_bus_freeze(struct device *dev)
200{
201 return __pnp_bus_suspend(dev, PMSG_FREEZE);
202}
203
204static int pnp_bus_poweroff(struct device *dev)
205{
206 return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
207}
208
209static int pnp_bus_resume(struct device *dev)
210{
211 struct pnp_dev *pnp_dev = to_pnp_dev(dev);
212 struct pnp_driver *pnp_drv = pnp_dev->driver;
213 int error;
214
215 if (!pnp_drv)
216 return 0;
217
218 if (pnp_dev->protocol->resume) {
219 error = pnp_dev->protocol->resume(pnp_dev);
220 if (error)
221 return error;
222 }
223
224 if (pnp_can_write(pnp_dev)) {
225 error = pnp_start_dev(pnp_dev);
226 if (error)
227 return error;
228 }
229
230 if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
231 error = pnp_drv->driver.pm->resume(dev);
232 if (error)
233 return error;
234 }
235
236 if (pnp_drv->resume) {
237 error = pnp_drv->resume(pnp_dev);
238 if (error)
239 return error;
240 }
241
242 return 0;
243}
244
245static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
246 /* Suspend callbacks */
247 .suspend = pnp_bus_suspend,
248 .resume = pnp_bus_resume,
249 /* Hibernate callbacks */
250 .freeze = pnp_bus_freeze,
251 .thaw = pnp_bus_resume,
252 .poweroff = pnp_bus_poweroff,
253 .restore = pnp_bus_resume,
254};
255
256struct bus_type pnp_bus_type = {
257 .name = "pnp",
258 .match = pnp_bus_match,
259 .probe = pnp_device_probe,
260 .remove = pnp_device_remove,
261 .shutdown = pnp_device_shutdown,
262 .pm = &pnp_bus_dev_pm_ops,
263 .dev_groups = pnp_dev_groups,
264};
265
266int pnp_register_driver(struct pnp_driver *drv)
267{
268 drv->driver.name = drv->name;
269 drv->driver.bus = &pnp_bus_type;
270
271 return driver_register(&drv->driver);
272}
273
274void pnp_unregister_driver(struct pnp_driver *drv)
275{
276 driver_unregister(&drv->driver);
277}
278
279/**
280 * pnp_add_id - adds an EISA id to the specified device
281 * @dev: pointer to the desired device
282 * @id: pointer to an EISA id string
283 */
284struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
285{
286 struct pnp_id *dev_id, *ptr;
287
288 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
289 if (!dev_id)
290 return NULL;
291
292 dev_id->id[0] = id[0];
293 dev_id->id[1] = id[1];
294 dev_id->id[2] = id[2];
295 dev_id->id[3] = tolower(id[3]);
296 dev_id->id[4] = tolower(id[4]);
297 dev_id->id[5] = tolower(id[5]);
298 dev_id->id[6] = tolower(id[6]);
299 dev_id->id[7] = '\0';
300
301 dev_id->next = NULL;
302 ptr = dev->id;
303 while (ptr && ptr->next)
304 ptr = ptr->next;
305 if (ptr)
306 ptr->next = dev_id;
307 else
308 dev->id = dev_id;
309
310 return dev_id;
311}
312
313EXPORT_SYMBOL(pnp_register_driver);
314EXPORT_SYMBOL(pnp_unregister_driver);
315EXPORT_SYMBOL(pnp_device_attach);
316EXPORT_SYMBOL(pnp_device_detach);