Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_container.c - ACPI Generic Container Driver | |
3 | * ($Revision: ) | |
4 | * | |
5 | * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com) | |
6 | * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com) | |
7 | * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com) | |
8 | * Copyright (C) 2004 Intel Corp. | |
9 | * Copyright (C) 2004 FUJITSU LIMITED | |
10 | * | |
11 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or (at | |
16 | * your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License along | |
24 | * with this program; if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
26 | * | |
27 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
28 | */ | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/acpi.h> | |
34 | #include <acpi/acpi_bus.h> | |
35 | #include <acpi/acpi_drivers.h> | |
36 | #include <acpi/container.h> | |
37 | ||
a192a958 LB |
38 | #define PREFIX "ACPI: " |
39 | ||
1da177e4 LT |
40 | #define ACPI_CONTAINER_DEVICE_NAME "ACPI container device" |
41 | #define ACPI_CONTAINER_CLASS "container" | |
42 | ||
43 | #define INSTALL_NOTIFY_HANDLER 1 | |
44 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
45 | ||
1da177e4 | 46 | #define _COMPONENT ACPI_CONTAINER_COMPONENT |
f52fd66d | 47 | ACPI_MODULE_NAME("container"); |
1da177e4 | 48 | |
f52fd66d | 49 | MODULE_AUTHOR("Anil S Keshavamurthy"); |
7cda93e0 | 50 | MODULE_DESCRIPTION("ACPI container driver"); |
1da177e4 LT |
51 | MODULE_LICENSE("GPL"); |
52 | ||
1da177e4 LT |
53 | static int acpi_container_add(struct acpi_device *device); |
54 | static int acpi_container_remove(struct acpi_device *device, int type); | |
55 | ||
1ba90e3a TR |
56 | static const struct acpi_device_id container_device_ids[] = { |
57 | {"ACPI0004", 0}, | |
58 | {"PNP0A05", 0}, | |
59 | {"PNP0A06", 0}, | |
60 | {"", 0}, | |
61 | }; | |
62 | MODULE_DEVICE_TABLE(acpi, container_device_ids); | |
63 | ||
1da177e4 | 64 | static struct acpi_driver acpi_container_driver = { |
c2b6705b | 65 | .name = "container", |
4be44fcd | 66 | .class = ACPI_CONTAINER_CLASS, |
1ba90e3a | 67 | .ids = container_device_ids, |
4be44fcd LB |
68 | .ops = { |
69 | .add = acpi_container_add, | |
70 | .remove = acpi_container_remove, | |
71 | }, | |
1da177e4 LT |
72 | }; |
73 | ||
1da177e4 LT |
74 | /*******************************************************************/ |
75 | ||
4be44fcd | 76 | static int is_device_present(acpi_handle handle) |
1da177e4 | 77 | { |
4be44fcd LB |
78 | acpi_handle temp; |
79 | acpi_status status; | |
27663c58 | 80 | unsigned long long sta; |
1da177e4 | 81 | |
1da177e4 LT |
82 | |
83 | status = acpi_get_handle(handle, "_STA", &temp); | |
84 | if (ACPI_FAILURE(status)) | |
a0bd4ac4 | 85 | return 1; /* _STA not found, assume device present */ |
1da177e4 LT |
86 | |
87 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
88 | if (ACPI_FAILURE(status)) | |
d550d98d | 89 | return 0; /* Firmware error */ |
1da177e4 | 90 | |
a0bd4ac4 | 91 | return ((sta & ACPI_STA_DEVICE_PRESENT) == ACPI_STA_DEVICE_PRESENT); |
1da177e4 LT |
92 | } |
93 | ||
94 | /*******************************************************************/ | |
4be44fcd | 95 | static int acpi_container_add(struct acpi_device *device) |
1da177e4 LT |
96 | { |
97 | struct acpi_container *container; | |
98 | ||
1da177e4 LT |
99 | |
100 | if (!device) { | |
6468463a | 101 | printk(KERN_ERR PREFIX "device is NULL\n"); |
d550d98d | 102 | return -EINVAL; |
1da177e4 LT |
103 | } |
104 | ||
36bcbec7 | 105 | container = kzalloc(sizeof(struct acpi_container), GFP_KERNEL); |
4be44fcd | 106 | if (!container) |
d550d98d | 107 | return -ENOMEM; |
4be44fcd | 108 | |
1da177e4 LT |
109 | container->handle = device->handle; |
110 | strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME); | |
111 | strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS); | |
db89b4f0 | 112 | device->driver_data = container; |
1da177e4 | 113 | |
4be44fcd LB |
114 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n", |
115 | acpi_device_name(device), acpi_device_bid(device))); | |
1da177e4 | 116 | |
d550d98d | 117 | return 0; |
1da177e4 LT |
118 | } |
119 | ||
4be44fcd | 120 | static int acpi_container_remove(struct acpi_device *device, int type) |
1da177e4 | 121 | { |
4be44fcd LB |
122 | acpi_status status = AE_OK; |
123 | struct acpi_container *pc = NULL; | |
1da177e4 | 124 | |
50dd0969 | 125 | pc = acpi_driver_data(device); |
6044ec88 | 126 | kfree(pc); |
1da177e4 LT |
127 | return status; |
128 | } | |
129 | ||
4be44fcd | 130 | static int container_device_add(struct acpi_device **device, acpi_handle handle) |
1da177e4 LT |
131 | { |
132 | acpi_handle phandle; | |
133 | struct acpi_device *pdev; | |
134 | int result; | |
135 | ||
1da177e4 LT |
136 | |
137 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 138 | return -ENODEV; |
1da177e4 LT |
139 | } |
140 | ||
141 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 142 | return -ENODEV; |
1da177e4 LT |
143 | } |
144 | ||
145 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) { | |
d550d98d | 146 | return -ENODEV; |
1da177e4 LT |
147 | } |
148 | ||
3fb02738 | 149 | result = acpi_bus_start(*device); |
1da177e4 | 150 | |
d550d98d | 151 | return result; |
1da177e4 LT |
152 | } |
153 | ||
4be44fcd | 154 | static void container_notify_cb(acpi_handle handle, u32 type, void *context) |
1da177e4 | 155 | { |
4be44fcd | 156 | struct acpi_device *device = NULL; |
1da177e4 LT |
157 | int result; |
158 | int present; | |
159 | acpi_status status; | |
160 | ||
1da177e4 LT |
161 | |
162 | present = is_device_present(handle); | |
4be44fcd | 163 | |
1da177e4 LT |
164 | switch (type) { |
165 | case ACPI_NOTIFY_BUS_CHECK: | |
166 | /* Fall through */ | |
167 | case ACPI_NOTIFY_DEVICE_CHECK: | |
4d939155 | 168 | printk(KERN_WARNING "Container driver received %s event\n", |
4be44fcd LB |
169 | (type == ACPI_NOTIFY_BUS_CHECK) ? |
170 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
171 | status = acpi_bus_get_device(handle, &device); |
172 | if (present) { | |
173 | if (ACPI_FAILURE(status) || !device) { | |
174 | result = container_device_add(&device, handle); | |
175 | if (!result) | |
f883d9db | 176 | kobject_uevent(&device->dev.kobj, |
312c004d | 177 | KOBJ_ONLINE); |
1da177e4 | 178 | else |
4d939155 FS |
179 | printk(KERN_WARNING |
180 | "Failed to add container\n"); | |
1da177e4 LT |
181 | } |
182 | } else { | |
183 | if (ACPI_SUCCESS(status)) { | |
184 | /* device exist and this is a remove request */ | |
f883d9db | 185 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
186 | } |
187 | } | |
188 | break; | |
189 | case ACPI_NOTIFY_EJECT_REQUEST: | |
190 | if (!acpi_bus_get_device(handle, &device) && device) { | |
f883d9db | 191 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
192 | } |
193 | break; | |
194 | default: | |
195 | break; | |
196 | } | |
d550d98d | 197 | return; |
1da177e4 LT |
198 | } |
199 | ||
200 | static acpi_status | |
201 | container_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 202 | u32 lvl, void *context, void **rv) |
1da177e4 | 203 | { |
4be44fcd | 204 | char *hid = NULL; |
4be44fcd LB |
205 | struct acpi_device_info *info; |
206 | acpi_status status; | |
207 | int *action = context; | |
1da177e4 | 208 | |
15b8dd53 BM |
209 | status = acpi_get_object_info(handle, &info); |
210 | if (ACPI_FAILURE(status)) { | |
d550d98d | 211 | return AE_OK; |
1da177e4 LT |
212 | } |
213 | ||
1da177e4 | 214 | if (info->valid & ACPI_VALID_HID) |
15b8dd53 | 215 | hid = info->hardware_id.string; |
1da177e4 LT |
216 | |
217 | if (hid == NULL) { | |
218 | goto end; | |
219 | } | |
220 | ||
221 | if (strcmp(hid, "ACPI0004") && strcmp(hid, "PNP0A05") && | |
4be44fcd | 222 | strcmp(hid, "PNP0A06")) { |
1da177e4 LT |
223 | goto end; |
224 | } | |
225 | ||
4be44fcd | 226 | switch (*action) { |
1da177e4 LT |
227 | case INSTALL_NOTIFY_HANDLER: |
228 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
229 | ACPI_SYSTEM_NOTIFY, |
230 | container_notify_cb, NULL); | |
1da177e4 LT |
231 | break; |
232 | case UNINSTALL_NOTIFY_HANDLER: | |
233 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
234 | ACPI_SYSTEM_NOTIFY, |
235 | container_notify_cb); | |
1da177e4 LT |
236 | break; |
237 | default: | |
238 | break; | |
239 | } | |
240 | ||
4be44fcd | 241 | end: |
15b8dd53 | 242 | kfree(info); |
1da177e4 | 243 | |
d550d98d | 244 | return AE_OK; |
1da177e4 LT |
245 | } |
246 | ||
4be44fcd | 247 | static int __init acpi_container_init(void) |
1da177e4 | 248 | { |
4be44fcd LB |
249 | int result = 0; |
250 | int action = INSTALL_NOTIFY_HANDLER; | |
1da177e4 LT |
251 | |
252 | result = acpi_bus_register_driver(&acpi_container_driver); | |
253 | if (result < 0) { | |
4be44fcd | 254 | return (result); |
1da177e4 LT |
255 | } |
256 | ||
257 | /* register notify handler to every container device */ | |
258 | acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
4be44fcd LB |
259 | ACPI_ROOT_OBJECT, |
260 | ACPI_UINT32_MAX, | |
261 | container_walk_namespace_cb, &action, NULL); | |
1da177e4 | 262 | |
4be44fcd | 263 | return (0); |
1da177e4 LT |
264 | } |
265 | ||
4be44fcd | 266 | static void __exit acpi_container_exit(void) |
1da177e4 | 267 | { |
4be44fcd | 268 | int action = UNINSTALL_NOTIFY_HANDLER; |
1da177e4 | 269 | |
1da177e4 LT |
270 | |
271 | acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
4be44fcd LB |
272 | ACPI_ROOT_OBJECT, |
273 | ACPI_UINT32_MAX, | |
274 | container_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
275 | |
276 | acpi_bus_unregister_driver(&acpi_container_driver); | |
277 | ||
d550d98d | 278 | return; |
1da177e4 LT |
279 | } |
280 | ||
281 | module_init(acpi_container_init); | |
282 | module_exit(acpi_container_exit); |