ACPI: delete tracing macros from drivers/acpi/*.c
[linux-2.6.git] / drivers / acpi / container.c
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
38 #define ACPI_CONTAINER_DRIVER_NAME      "ACPI container driver"
39 #define ACPI_CONTAINER_DEVICE_NAME      "ACPI container device"
40 #define ACPI_CONTAINER_CLASS            "container"
41
42 #define INSTALL_NOTIFY_HANDLER          1
43 #define UNINSTALL_NOTIFY_HANDLER        2
44
45 #define ACPI_CONTAINER_COMPONENT        0x01000000
46 #define _COMPONENT                      ACPI_CONTAINER_COMPONENT
47 ACPI_MODULE_NAME("acpi_container")
48
49     MODULE_AUTHOR("Anil S Keshavamurthy");
50 MODULE_DESCRIPTION(ACPI_CONTAINER_DRIVER_NAME);
51 MODULE_LICENSE("GPL");
52
53 #define ACPI_STA_PRESENT                (0x00000001)
54
55 static int acpi_container_add(struct acpi_device *device);
56 static int acpi_container_remove(struct acpi_device *device, int type);
57
58 static struct acpi_driver acpi_container_driver = {
59         .name = ACPI_CONTAINER_DRIVER_NAME,
60         .class = ACPI_CONTAINER_CLASS,
61         .ids = "ACPI0004,PNP0A05,PNP0A06",
62         .ops = {
63                 .add = acpi_container_add,
64                 .remove = acpi_container_remove,
65                 },
66 };
67
68 /*******************************************************************/
69
70 static int is_device_present(acpi_handle handle)
71 {
72         acpi_handle temp;
73         acpi_status status;
74         unsigned long sta;
75
76
77         status = acpi_get_handle(handle, "_STA", &temp);
78         if (ACPI_FAILURE(status))
79                 return 1;       /* _STA not found, assmue device present */
80
81         status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
82         if (ACPI_FAILURE(status))
83                 return 0;       /* Firmware error */
84
85         return ((sta & ACPI_STA_PRESENT) == ACPI_STA_PRESENT);
86 }
87
88 /*******************************************************************/
89 static int acpi_container_add(struct acpi_device *device)
90 {
91         struct acpi_container *container;
92
93
94         if (!device) {
95                 printk(KERN_ERR PREFIX "device is NULL\n");
96                 return -EINVAL;
97         }
98
99         container = kmalloc(sizeof(struct acpi_container), GFP_KERNEL);
100         if (!container)
101                 return -ENOMEM;
102
103         memset(container, 0, sizeof(struct acpi_container));
104         container->handle = device->handle;
105         strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME);
106         strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS);
107         acpi_driver_data(device) = container;
108
109         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n",
110                           acpi_device_name(device), acpi_device_bid(device)));
111
112         return 0;
113 }
114
115 static int acpi_container_remove(struct acpi_device *device, int type)
116 {
117         acpi_status status = AE_OK;
118         struct acpi_container *pc = NULL;
119
120         pc = (struct acpi_container *)acpi_driver_data(device);
121         kfree(pc);
122         return status;
123 }
124
125 static int container_device_add(struct acpi_device **device, acpi_handle handle)
126 {
127         acpi_handle phandle;
128         struct acpi_device *pdev;
129         int result;
130
131
132         if (acpi_get_parent(handle, &phandle)) {
133                 return -ENODEV;
134         }
135
136         if (acpi_bus_get_device(phandle, &pdev)) {
137                 return -ENODEV;
138         }
139
140         if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) {
141                 return -ENODEV;
142         }
143
144         result = acpi_bus_start(*device);
145
146         return result;
147 }
148
149 static void container_notify_cb(acpi_handle handle, u32 type, void *context)
150 {
151         struct acpi_device *device = NULL;
152         int result;
153         int present;
154         acpi_status status;
155
156
157         present = is_device_present(handle);
158
159         switch (type) {
160         case ACPI_NOTIFY_BUS_CHECK:
161                 /* Fall through */
162         case ACPI_NOTIFY_DEVICE_CHECK:
163                 printk("Container driver received %s event\n",
164                        (type == ACPI_NOTIFY_BUS_CHECK) ?
165                        "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
166                 status = acpi_bus_get_device(handle, &device);
167                 if (present) {
168                         if (ACPI_FAILURE(status) || !device) {
169                                 result = container_device_add(&device, handle);
170                                 if (!result)
171                                         kobject_uevent(&device->kobj,
172                                                        KOBJ_ONLINE);
173                                 else
174                                         printk("Failed to add container\n");
175                         }
176                 } else {
177                         if (ACPI_SUCCESS(status)) {
178                                 /* device exist and this is a remove request */
179                                 kobject_uevent(&device->kobj, KOBJ_OFFLINE);
180                         }
181                 }
182                 break;
183         case ACPI_NOTIFY_EJECT_REQUEST:
184                 if (!acpi_bus_get_device(handle, &device) && device) {
185                         kobject_uevent(&device->kobj, KOBJ_OFFLINE);
186                 }
187                 break;
188         default:
189                 break;
190         }
191         return;
192 }
193
194 static acpi_status
195 container_walk_namespace_cb(acpi_handle handle,
196                             u32 lvl, void *context, void **rv)
197 {
198         char *hid = NULL;
199         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
200         struct acpi_device_info *info;
201         acpi_status status;
202         int *action = context;
203
204
205         status = acpi_get_object_info(handle, &buffer);
206         if (ACPI_FAILURE(status) || !buffer.pointer) {
207                 return AE_OK;
208         }
209
210         info = buffer.pointer;
211         if (info->valid & ACPI_VALID_HID)
212                 hid = info->hardware_id.value;
213
214         if (hid == NULL) {
215                 goto end;
216         }
217
218         if (strcmp(hid, "ACPI0004") && strcmp(hid, "PNP0A05") &&
219             strcmp(hid, "PNP0A06")) {
220                 goto end;
221         }
222
223         switch (*action) {
224         case INSTALL_NOTIFY_HANDLER:
225                 acpi_install_notify_handler(handle,
226                                             ACPI_SYSTEM_NOTIFY,
227                                             container_notify_cb, NULL);
228                 break;
229         case UNINSTALL_NOTIFY_HANDLER:
230                 acpi_remove_notify_handler(handle,
231                                            ACPI_SYSTEM_NOTIFY,
232                                            container_notify_cb);
233                 break;
234         default:
235                 break;
236         }
237
238       end:
239         acpi_os_free(buffer.pointer);
240
241         return AE_OK;
242 }
243
244 static int __init acpi_container_init(void)
245 {
246         int result = 0;
247         int action = INSTALL_NOTIFY_HANDLER;
248
249         result = acpi_bus_register_driver(&acpi_container_driver);
250         if (result < 0) {
251                 return (result);
252         }
253
254         /* register notify handler to every container device */
255         acpi_walk_namespace(ACPI_TYPE_DEVICE,
256                             ACPI_ROOT_OBJECT,
257                             ACPI_UINT32_MAX,
258                             container_walk_namespace_cb, &action, NULL);
259
260         return (0);
261 }
262
263 static void __exit acpi_container_exit(void)
264 {
265         int action = UNINSTALL_NOTIFY_HANDLER;
266
267
268         acpi_walk_namespace(ACPI_TYPE_DEVICE,
269                             ACPI_ROOT_OBJECT,
270                             ACPI_UINT32_MAX,
271                             container_walk_namespace_cb, &action, NULL);
272
273         acpi_bus_unregister_driver(&acpi_container_driver);
274
275         return;
276 }
277
278 module_init(acpi_container_init);
279 module_exit(acpi_container_exit);