1 /* 2 * acpi_bus.h - ACPI Bus Driver ($Revision: 22 $) 3 * 4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or (at 12 * your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write to the Free Software Foundation, Inc., 21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #ifndef __ACPI_BUS_H__ 27 #define __ACPI_BUS_H__ 28 29 #include <linux/device.h> 30 31 #include <acpi/acpi.h> 32 33 #define PREFIX "ACPI: " 34 35 /* TBD: Make dynamic */ 36 #define ACPI_MAX_HANDLES 10 37 struct acpi_handle_list { 38 u32 count; 39 acpi_handle handles[ACPI_MAX_HANDLES]; 40 }; 41 42 /* acpi_utils.h */ 43 acpi_status 44 acpi_extract_package(union acpi_object *package, 45 struct acpi_buffer *format, struct acpi_buffer *buffer); 46 acpi_status 47 acpi_evaluate_integer(acpi_handle handle, 48 acpi_string pathname, 49 struct acpi_object_list *arguments, unsigned long long *data); 50 acpi_status 51 acpi_evaluate_reference(acpi_handle handle, 52 acpi_string pathname, 53 struct acpi_object_list *arguments, 54 struct acpi_handle_list *list); 55 56 #ifdef CONFIG_ACPI 57 58 #include <linux/proc_fs.h> 59 60 #define ACPI_BUS_FILE_ROOT "acpi" 61 extern struct proc_dir_entry *acpi_root_dir; 62 63 enum acpi_bus_removal_type { 64 ACPI_BUS_REMOVAL_NORMAL = 0, 65 ACPI_BUS_REMOVAL_EJECT, 66 ACPI_BUS_REMOVAL_SUPRISE, 67 ACPI_BUS_REMOVAL_TYPE_COUNT 68 }; 69 70 enum acpi_bus_device_type { 71 ACPI_BUS_TYPE_DEVICE = 0, 72 ACPI_BUS_TYPE_POWER, 73 ACPI_BUS_TYPE_PROCESSOR, 74 ACPI_BUS_TYPE_THERMAL, 75 ACPI_BUS_TYPE_SYSTEM, 76 ACPI_BUS_TYPE_POWER_BUTTON, 77 ACPI_BUS_TYPE_SLEEP_BUTTON, 78 ACPI_BUS_DEVICE_TYPE_COUNT 79 }; 80 81 struct acpi_driver; 82 struct acpi_device; 83 84 /* 85 * ACPI Driver 86 * ----------- 87 */ 88 89 typedef int (*acpi_op_add) (struct acpi_device * device); 90 typedef int (*acpi_op_remove) (struct acpi_device * device, int type); 91 typedef int (*acpi_op_start) (struct acpi_device * device); 92 typedef int (*acpi_op_stop) (struct acpi_device * device, int type); 93 typedef int (*acpi_op_suspend) (struct acpi_device * device, 94 pm_message_t state); 95 typedef int (*acpi_op_resume) (struct acpi_device * device); 96 typedef int (*acpi_op_bind) (struct acpi_device * device); 97 typedef int (*acpi_op_unbind) (struct acpi_device * device); 98 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); 99 100 struct acpi_bus_ops { 101 u32 acpi_op_add:1; 102 u32 acpi_op_start:1; 103 }; 104 105 struct acpi_device_ops { 106 acpi_op_add add; 107 acpi_op_remove remove; 108 acpi_op_start start; 109 acpi_op_stop stop; 110 acpi_op_suspend suspend; 111 acpi_op_resume resume; 112 acpi_op_bind bind; 113 acpi_op_unbind unbind; 114 acpi_op_notify notify; 115 }; 116 117 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ 118 119 struct acpi_driver { 120 char name[80]; 121 char class[80]; 122 const struct acpi_device_id *ids; /* Supported Hardware IDs */ 123 unsigned int flags; 124 struct acpi_device_ops ops; 125 struct device_driver drv; 126 struct module *owner; 127 }; 128 129 /* 130 * ACPI Device 131 * ----------- 132 */ 133 134 /* Status (_STA) */ 135 136 struct acpi_device_status { 137 u32 present:1; 138 u32 enabled:1; 139 u32 show_in_ui:1; 140 u32 functional:1; 141 u32 battery_present:1; 142 u32 reserved:27; 143 }; 144 145 /* Flags */ 146 147 struct acpi_device_flags { 148 u32 dynamic_status:1; 149 u32 hardware_id:1; 150 u32 compatible_ids:1; 151 u32 bus_address:1; 152 u32 unique_id:1; 153 u32 removable:1; 154 u32 ejectable:1; 155 u32 lockable:1; 156 u32 suprise_removal_ok:1; 157 u32 power_manageable:1; 158 u32 performance_manageable:1; 159 u32 wake_capable:1; /* Wakeup(_PRW) supported? */ 160 u32 force_power_state:1; 161 u32 reserved:19; 162 }; 163 164 /* File System */ 165 166 struct acpi_device_dir { 167 struct proc_dir_entry *entry; 168 }; 169 170 #define acpi_device_dir(d) ((d)->dir.entry) 171 172 /* Plug and Play */ 173 174 typedef char acpi_bus_id[8]; 175 typedef unsigned long acpi_bus_address; 176 typedef char acpi_hardware_id[15]; 177 typedef char acpi_unique_id[9]; 178 typedef char acpi_device_name[40]; 179 typedef char acpi_device_class[20]; 180 181 struct acpi_device_pnp { 182 acpi_bus_id bus_id; /* Object name */ 183 acpi_bus_address bus_address; /* _ADR */ 184 acpi_hardware_id hardware_id; /* _HID */ 185 struct acpi_compatible_id_list *cid_list; /* _CIDs */ 186 acpi_unique_id unique_id; /* _UID */ 187 acpi_device_name device_name; /* Driver-determined */ 188 acpi_device_class device_class; /* " */ 189 }; 190 191 #define acpi_device_bid(d) ((d)->pnp.bus_id) 192 #define acpi_device_adr(d) ((d)->pnp.bus_address) 193 #define acpi_device_hid(d) ((d)->pnp.hardware_id) 194 #define acpi_device_uid(d) ((d)->pnp.unique_id) 195 #define acpi_device_name(d) ((d)->pnp.device_name) 196 #define acpi_device_class(d) ((d)->pnp.device_class) 197 198 /* Power Management */ 199 200 struct acpi_device_power_flags { 201 u32 explicit_get:1; /* _PSC present? */ 202 u32 power_resources:1; /* Power resources */ 203 u32 inrush_current:1; /* Serialize Dx->D0 */ 204 u32 power_removed:1; /* Optimize Dx->D0 */ 205 u32 reserved:28; 206 }; 207 208 struct acpi_device_power_state { 209 struct { 210 u8 valid:1; 211 u8 explicit_set:1; /* _PSx present? */ 212 u8 reserved:6; 213 } flags; 214 int power; /* % Power (compared to D0) */ 215 int latency; /* Dx->D0 time (microseconds) */ 216 struct acpi_handle_list resources; /* Power resources referenced */ 217 }; 218 219 struct acpi_device_power { 220 int state; /* Current state */ 221 struct acpi_device_power_flags flags; 222 struct acpi_device_power_state states[4]; /* Power states (D0-D3) */ 223 }; 224 225 /* Performance Management */ 226 227 struct acpi_device_perf_flags { 228 u8 reserved:8; 229 }; 230 231 struct acpi_device_perf_state { 232 struct { 233 u8 valid:1; 234 u8 reserved:7; 235 } flags; 236 u8 power; /* % Power (compared to P0) */ 237 u8 performance; /* % Performance ( " ) */ 238 int latency; /* Px->P0 time (microseconds) */ 239 }; 240 241 struct acpi_device_perf { 242 int state; 243 struct acpi_device_perf_flags flags; 244 int state_count; 245 struct acpi_device_perf_state *states; 246 }; 247 248 /* Wakeup Management */ 249 struct acpi_device_wakeup_flags { 250 u8 valid:1; /* Can successfully enable wakeup? */ 251 u8 prepared:1; /* Has the wake-up capability been enabled? */ 252 u8 run_wake:1; /* Run-Wake GPE devices */ 253 }; 254 255 struct acpi_device_wakeup_state { 256 u8 enabled:1; 257 }; 258 259 struct acpi_device_wakeup { 260 acpi_handle gpe_device; 261 acpi_integer gpe_number; 262 acpi_integer sleep_state; 263 struct acpi_handle_list resources; 264 struct acpi_device_wakeup_state state; 265 struct acpi_device_wakeup_flags flags; 266 }; 267 268 /* Device */ 269 270 struct acpi_device { 271 acpi_handle handle; 272 struct acpi_device *parent; 273 struct list_head children; 274 struct list_head node; 275 struct list_head wakeup_list; 276 struct acpi_device_status status; 277 struct acpi_device_flags flags; 278 struct acpi_device_pnp pnp; 279 struct acpi_device_power power; 280 struct acpi_device_wakeup wakeup; 281 struct acpi_device_perf performance; 282 struct acpi_device_dir dir; 283 struct acpi_device_ops ops; 284 struct acpi_driver *driver; 285 void *driver_data; 286 struct device dev; 287 struct acpi_bus_ops bus_ops; /* workaround for different code path for hotplug */ 288 enum acpi_bus_removal_type removal_type; /* indicate for different removal type */ 289 }; 290 291 static inline void *acpi_driver_data(struct acpi_device *d) 292 { 293 return d->driver_data; 294 } 295 296 #define to_acpi_device(d) container_of(d, struct acpi_device, dev) 297 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) 298 299 /* acpi_device.dev.bus == &acpi_bus_type */ 300 extern struct bus_type acpi_bus_type; 301 302 /* 303 * Events 304 * ------ 305 */ 306 307 struct acpi_bus_event { 308 struct list_head node; 309 acpi_device_class device_class; 310 acpi_bus_id bus_id; 311 u32 type; 312 u32 data; 313 }; 314 315 extern struct kobject *acpi_kobj; 316 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); 317 void acpi_bus_private_data_handler(acpi_handle, u32, void *); 318 int acpi_bus_get_private_data(acpi_handle, void **); 319 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); 320 extern int register_acpi_notifier(struct notifier_block *); 321 extern int unregister_acpi_notifier(struct notifier_block *); 322 323 extern int register_acpi_bus_notifier(struct notifier_block *nb); 324 extern void unregister_acpi_bus_notifier(struct notifier_block *nb); 325 /* 326 * External Functions 327 */ 328 329 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device); 330 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context); 331 int acpi_bus_get_status(struct acpi_device *device); 332 int acpi_bus_get_power(acpi_handle handle, int *state); 333 int acpi_bus_set_power(acpi_handle handle, int state); 334 bool acpi_bus_power_manageable(acpi_handle handle); 335 bool acpi_bus_can_wakeup(acpi_handle handle); 336 #ifdef CONFIG_ACPI_PROC_EVENT 337 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data); 338 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data); 339 int acpi_bus_receive_event(struct acpi_bus_event *event); 340 #else 341 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) 342 { return 0; } 343 #endif 344 int acpi_bus_register_driver(struct acpi_driver *driver); 345 void acpi_bus_unregister_driver(struct acpi_driver *driver); 346 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent, 347 acpi_handle handle, int type); 348 int acpi_bus_trim(struct acpi_device *start, int rmdevice); 349 int acpi_bus_start(struct acpi_device *device); 350 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); 351 int acpi_match_device_ids(struct acpi_device *device, 352 const struct acpi_device_id *ids); 353 int acpi_create_dir(struct acpi_device *); 354 void acpi_remove_dir(struct acpi_device *); 355 356 /* 357 * Bind physical devices with ACPI devices 358 */ 359 #include <linux/device.h> 360 struct acpi_bus_type { 361 struct list_head list; 362 struct bus_type *bus; 363 /* For general devices under the bus */ 364 int (*find_device) (struct device *, acpi_handle *); 365 /* For bridges, such as PCI root bridge, IDE controller */ 366 int (*find_bridge) (struct device *, acpi_handle *); 367 }; 368 int register_acpi_bus_type(struct acpi_bus_type *); 369 int unregister_acpi_bus_type(struct acpi_bus_type *); 370 struct device *acpi_get_physical_device(acpi_handle); 371 372 /* helper */ 373 acpi_handle acpi_get_child(acpi_handle, acpi_integer); 374 int acpi_is_root_bridge(acpi_handle); 375 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int); 376 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle)) 377 378 #ifdef CONFIG_PM_SLEEP 379 int acpi_pm_device_sleep_state(struct device *, int *); 380 int acpi_pm_device_sleep_wake(struct device *, bool); 381 #else /* !CONFIG_PM_SLEEP */ 382 static inline int acpi_pm_device_sleep_state(struct device *d, int *p) 383 { 384 if (p) 385 *p = ACPI_STATE_D0; 386 return ACPI_STATE_D3; 387 } 388 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable) 389 { 390 return -ENODEV; 391 } 392 #endif /* !CONFIG_PM_SLEEP */ 393 394 #endif /* CONFIG_ACPI */ 395 396 #endif /*__ACPI_BUS_H__*/ 397