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 | { | |
61 | spin_lock(&pnp_lock); | |
9dd78466 | 62 | if (pnp_dev->status != PNP_READY) { |
1da177e4 LT |
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 | ||
71 | void 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 | ||
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 | ||
9dd78466 BH |
89 | pnp_dbg("match found with the PnP device '%s' and the driver '%s'", |
90 | dev->bus_id, pnp_drv->name); | |
1da177e4 LT |
91 | |
92 | error = pnp_device_attach(pnp_dev); | |
93 | if (error < 0) | |
94 | return error; | |
95 | ||
96 | if (pnp_dev->active == 0) { | |
97 | if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) { | |
98 | error = pnp_activate_dev(pnp_dev); | |
99 | if (error < 0) | |
100 | return error; | |
101 | } | |
102 | } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE) | |
9dd78466 | 103 | == PNP_DRIVER_RES_DISABLE) { |
1da177e4 LT |
104 | error = pnp_disable_dev(pnp_dev); |
105 | if (error < 0) | |
106 | return error; | |
107 | } | |
108 | error = 0; | |
109 | if (pnp_drv->probe) { | |
110 | dev_id = match_device(pnp_drv, pnp_dev); | |
111 | if (dev_id != NULL) | |
112 | error = pnp_drv->probe(pnp_dev, dev_id); | |
113 | } | |
9dd78466 | 114 | if (error >= 0) { |
1da177e4 LT |
115 | pnp_dev->driver = pnp_drv; |
116 | error = 0; | |
117 | } else | |
118 | goto fail; | |
119 | return error; | |
120 | ||
9dd78466 | 121 | fail: |
1da177e4 LT |
122 | pnp_device_detach(pnp_dev); |
123 | return error; | |
124 | } | |
125 | ||
126 | static int pnp_device_remove(struct device *dev) | |
127 | { | |
9dd78466 BH |
128 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
129 | struct pnp_driver *drv = pnp_dev->driver; | |
1da177e4 LT |
130 | |
131 | if (drv) { | |
132 | if (drv->remove) | |
133 | drv->remove(pnp_dev); | |
134 | pnp_dev->driver = NULL; | |
135 | } | |
136 | pnp_device_detach(pnp_dev); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int pnp_bus_match(struct device *dev, struct device_driver *drv) | |
141 | { | |
9dd78466 BH |
142 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
143 | struct pnp_driver *pnp_drv = to_pnp_driver(drv); | |
07d4e9af | 144 | |
1da177e4 LT |
145 | if (match_device(pnp_drv, pnp_dev) == NULL) |
146 | return 0; | |
147 | return 1; | |
148 | } | |
149 | ||
4c98cfef TI |
150 | static int pnp_bus_suspend(struct device *dev, pm_message_t state) |
151 | { | |
9dd78466 BH |
152 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
153 | struct pnp_driver *pnp_drv = pnp_dev->driver; | |
68094e32 PO |
154 | int error; |
155 | ||
156 | if (!pnp_drv) | |
157 | return 0; | |
158 | ||
159 | if (pnp_drv->suspend) { | |
160 | error = pnp_drv->suspend(pnp_dev, state); | |
161 | if (error) | |
162 | return error; | |
163 | } | |
164 | ||
165 | if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) && | |
166 | pnp_can_disable(pnp_dev)) { | |
9dd78466 BH |
167 | error = pnp_stop_dev(pnp_dev); |
168 | if (error) | |
169 | return error; | |
68094e32 | 170 | } |
4c98cfef | 171 | |
fc30e68e SL |
172 | if (pnp_dev->protocol && pnp_dev->protocol->suspend) |
173 | pnp_dev->protocol->suspend(pnp_dev, state); | |
4c98cfef TI |
174 | return 0; |
175 | } | |
176 | ||
68094e32 | 177 | static int pnp_bus_resume(struct device *dev) |
4c98cfef | 178 | { |
9dd78466 BH |
179 | struct pnp_dev *pnp_dev = to_pnp_dev(dev); |
180 | struct pnp_driver *pnp_drv = pnp_dev->driver; | |
68094e32 PO |
181 | int error; |
182 | ||
183 | if (!pnp_drv) | |
184 | return 0; | |
185 | ||
fc30e68e SL |
186 | if (pnp_dev->protocol && pnp_dev->protocol->resume) |
187 | pnp_dev->protocol->resume(pnp_dev); | |
188 | ||
68094e32 PO |
189 | if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) { |
190 | error = pnp_start_dev(pnp_dev); | |
191 | if (error) | |
192 | return error; | |
193 | } | |
4c98cfef | 194 | |
68094e32 PO |
195 | if (pnp_drv->resume) |
196 | return pnp_drv->resume(pnp_dev); | |
197 | ||
198 | return 0; | |
4c98cfef | 199 | } |
1da177e4 LT |
200 | |
201 | struct bus_type pnp_bus_type = { | |
07d4e9af BH |
202 | .name = "pnp", |
203 | .match = pnp_bus_match, | |
204 | .probe = pnp_device_probe, | |
205 | .remove = pnp_device_remove, | |
4c98cfef | 206 | .suspend = pnp_bus_suspend, |
07d4e9af | 207 | .resume = pnp_bus_resume, |
1da177e4 LT |
208 | }; |
209 | ||
1da177e4 LT |
210 | int pnp_register_driver(struct pnp_driver *drv) |
211 | { | |
1da177e4 LT |
212 | pnp_dbg("the driver '%s' has been registered", drv->name); |
213 | ||
214 | drv->driver.name = drv->name; | |
215 | drv->driver.bus = &pnp_bus_type; | |
1da177e4 | 216 | |
982c6094 | 217 | return driver_register(&drv->driver); |
1da177e4 LT |
218 | } |
219 | ||
220 | void pnp_unregister_driver(struct pnp_driver *drv) | |
221 | { | |
222 | driver_unregister(&drv->driver); | |
223 | pnp_dbg("the driver '%s' has been unregistered", drv->name); | |
224 | } | |
225 | ||
226 | /** | |
227 | * pnp_add_id - adds an EISA id to the specified device | |
228 | * @id: pointer to a pnp_id structure | |
229 | * @dev: pointer to the desired device | |
1da177e4 | 230 | */ |
1da177e4 LT |
231 | int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev) |
232 | { | |
233 | struct pnp_id *ptr; | |
07d4e9af | 234 | |
1da177e4 LT |
235 | if (!id) |
236 | return -EINVAL; | |
237 | if (!dev) | |
238 | return -EINVAL; | |
239 | id->next = NULL; | |
240 | ptr = dev->id; | |
241 | while (ptr && ptr->next) | |
242 | ptr = ptr->next; | |
243 | if (ptr) | |
244 | ptr->next = id; | |
245 | else | |
246 | dev->id = id; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | EXPORT_SYMBOL(pnp_register_driver); | |
251 | EXPORT_SYMBOL(pnp_unregister_driver); | |
1da177e4 LT |
252 | EXPORT_SYMBOL(pnp_device_attach); |
253 | EXPORT_SYMBOL(pnp_device_detach); |