Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame^] | 47 | ACPI_MODULE_NAME("container"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame^] | 49 | MODULE_AUTHOR("Anil S Keshavamurthy"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 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 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /*******************************************************************/ |
| 69 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 70 | static int is_device_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | acpi_handle temp; |
| 73 | acpi_status status; |
| 74 | unsigned long sta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | status = acpi_get_handle(handle, "_STA", &temp); |
| 78 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 79 | return 1; /* _STA not found, assmue device present */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 82 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 83 | return 0; /* Firmware error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 85 | return ((sta & ACPI_STA_PRESENT) == ACPI_STA_PRESENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /*******************************************************************/ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 89 | static int acpi_container_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | struct acpi_container *container; |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 95 | printk(KERN_ERR PREFIX "device is NULL\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 96 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 99 | container = kzalloc(sizeof(struct acpi_container), GFP_KERNEL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | if (!container) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 101 | return -ENOMEM; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | container->handle = device->handle; |
| 104 | strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME); |
| 105 | strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS); |
| 106 | acpi_driver_data(device) = container; |
| 107 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n", |
| 109 | acpi_device_name(device), acpi_device_bid(device))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 111 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | } |
| 113 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | static int acpi_container_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | acpi_status status = AE_OK; |
| 117 | struct acpi_container *pc = NULL; |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 118 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 119 | pc = acpi_driver_data(device); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 120 | kfree(pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | return status; |
| 122 | } |
| 123 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | static int container_device_add(struct acpi_device **device, acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
| 126 | acpi_handle phandle; |
| 127 | struct acpi_device *pdev; |
| 128 | int result; |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
| 131 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 132 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 136 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 140 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 143 | result = acpi_bus_start(*device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 145 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
| 147 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | static void container_notify_cb(acpi_handle handle, u32 type, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | int result; |
| 152 | int present; |
| 153 | acpi_status status; |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | present = is_device_present(handle); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | switch (type) { |
| 159 | case ACPI_NOTIFY_BUS_CHECK: |
| 160 | /* Fall through */ |
| 161 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 162 | printk("Container driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 163 | (type == ACPI_NOTIFY_BUS_CHECK) ? |
| 164 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | status = acpi_bus_get_device(handle, &device); |
| 166 | if (present) { |
| 167 | if (ACPI_FAILURE(status) || !device) { |
| 168 | result = container_device_add(&device, handle); |
| 169 | if (!result) |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 170 | kobject_uevent(&device->dev.kobj, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 171 | KOBJ_ONLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | else |
| 173 | printk("Failed to add container\n"); |
| 174 | } |
| 175 | } else { |
| 176 | if (ACPI_SUCCESS(status)) { |
| 177 | /* device exist and this is a remove request */ |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 178 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | } |
| 181 | break; |
| 182 | case ACPI_NOTIFY_EJECT_REQUEST: |
| 183 | if (!acpi_bus_get_device(handle, &device) && device) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 184 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | break; |
| 187 | default: |
| 188 | break; |
| 189 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 190 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static acpi_status |
| 194 | container_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 195 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | char *hid = NULL; |
| 198 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 199 | struct acpi_device_info *info; |
| 200 | acpi_status status; |
| 201 | int *action = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | status = acpi_get_object_info(handle, &buffer); |
| 205 | if (ACPI_FAILURE(status) || !buffer.pointer) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 206 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | info = buffer.pointer; |
| 210 | if (info->valid & ACPI_VALID_HID) |
| 211 | hid = info->hardware_id.value; |
| 212 | |
| 213 | if (hid == NULL) { |
| 214 | goto end; |
| 215 | } |
| 216 | |
| 217 | if (strcmp(hid, "ACPI0004") && strcmp(hid, "PNP0A05") && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 218 | strcmp(hid, "PNP0A06")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | goto end; |
| 220 | } |
| 221 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 222 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | case INSTALL_NOTIFY_HANDLER: |
| 224 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 225 | ACPI_SYSTEM_NOTIFY, |
| 226 | container_notify_cb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | break; |
| 228 | case UNINSTALL_NOTIFY_HANDLER: |
| 229 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 230 | ACPI_SYSTEM_NOTIFY, |
| 231 | container_notify_cb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | break; |
| 233 | default: |
| 234 | break; |
| 235 | } |
| 236 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | end: |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 238 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 240 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | static int __init acpi_container_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 245 | int result = 0; |
| 246 | int action = INSTALL_NOTIFY_HANDLER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | result = acpi_bus_register_driver(&acpi_container_driver); |
| 249 | if (result < 0) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 250 | return (result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | /* register notify handler to every container device */ |
| 254 | acpi_walk_namespace(ACPI_TYPE_DEVICE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 255 | ACPI_ROOT_OBJECT, |
| 256 | ACPI_UINT32_MAX, |
| 257 | container_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 259 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | static void __exit acpi_container_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | int action = UNINSTALL_NOTIFY_HANDLER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | acpi_walk_namespace(ACPI_TYPE_DEVICE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 268 | ACPI_ROOT_OBJECT, |
| 269 | ACPI_UINT32_MAX, |
| 270 | container_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | acpi_bus_unregister_driver(&acpi_container_driver); |
| 273 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 274 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | module_init(acpi_container_init); |
| 278 | module_exit(acpi_container_exit); |