include/acpi/acpi_bus.h

   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_lock) (struct acpi_device * device, int type);
  92 typedef int (*acpi_op_start) (struct acpi_device * device);
  93 typedef int (*acpi_op_stop) (struct acpi_device * device, int type);
  94 typedef int (*acpi_op_suspend) (struct acpi_device * device,
  95                                 pm_message_t state);
  96 typedef int (*acpi_op_resume) (struct acpi_device * device);
  97 typedef int (*acpi_op_scan) (struct acpi_device * device);
  98 typedef int (*acpi_op_bind) (struct acpi_device * device);
  99 typedef int (*acpi_op_unbind) (struct acpi_device * device);
 100 typedef int (*acpi_op_shutdown) (struct acpi_device * device);
 101
 102 struct acpi_bus_ops {
 103         u32 acpi_op_add:1;
 104         u32 acpi_op_remove:1;
 105         u32 acpi_op_lock:1;
 106         u32 acpi_op_start:1;
 107         u32 acpi_op_stop:1;
 108         u32 acpi_op_suspend:1;
 109         u32 acpi_op_resume:1;
 110         u32 acpi_op_scan:1;
 111         u32 acpi_op_bind:1;
 112         u32 acpi_op_unbind:1;
 113         u32 acpi_op_shutdown:1;
 114         u32 reserved:21;
 115 };
 116
 117 struct acpi_device_ops {
 118         acpi_op_add add;
 119         acpi_op_remove remove;
 120         acpi_op_lock lock;
 121         acpi_op_start start;
 122         acpi_op_stop stop;
 123         acpi_op_suspend suspend;
 124         acpi_op_resume resume;
 125         acpi_op_scan scan;
 126         acpi_op_bind bind;
 127         acpi_op_unbind unbind;
 128         acpi_op_shutdown shutdown;
 129 };
 130
 131 struct acpi_driver {
 132         char name[80];
 133         char class[80];
 134         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 135         struct acpi_device_ops ops;
 136         struct device_driver drv;
 137         struct module *owner;
 138 };
 139
 140 /*
 141  * ACPI Device
 142  * -----------
 143  */
 144
 145 /* Status (_STA) */
 146
 147 struct acpi_device_status {
 148         u32 present:1;
 149         u32 enabled:1;
 150         u32 show_in_ui:1;
 151         u32 functional:1;
 152         u32 battery_present:1;
 153         u32 reserved:27;
 154 };
 155
 156 /* Flags */
 157
 158 struct acpi_device_flags {
 159         u32 dynamic_status:1;
 160         u32 hardware_id:1;
 161         u32 compatible_ids:1;
 162         u32 bus_address:1;
 163         u32 unique_id:1;
 164         u32 removable:1;
 165         u32 ejectable:1;
 166         u32 lockable:1;
 167         u32 suprise_removal_ok:1;
 168         u32 power_manageable:1;
 169         u32 performance_manageable:1;
 170         u32 wake_capable:1;     /* Wakeup(_PRW) supported? */
 171         u32 force_power_state:1;
 172         u32 reserved:19;
 173 };
 174
 175 /* File System */
 176
 177 struct acpi_device_dir {
 178         struct proc_dir_entry *entry;
 179 };
 180
 181 #define acpi_device_dir(d)      ((d)->dir.entry)
 182
 183 /* Plug and Play */
 184
 185 typedef char acpi_bus_id[5];
 186 typedef unsigned long acpi_bus_address;
 187 typedef char acpi_hardware_id[15];
 188 typedef char acpi_unique_id[9];
 189 typedef char acpi_device_name[40];
 190 typedef char acpi_device_class[20];
 191
 192 struct acpi_device_pnp {
 193         acpi_bus_id bus_id;     /* Object name */
 194         acpi_bus_address bus_address;   /* _ADR */
 195         acpi_hardware_id hardware_id;   /* _HID */
 196         struct acpi_compatible_id_list *cid_list;       /* _CIDs */
 197         acpi_unique_id unique_id;       /* _UID */
 198         acpi_device_name device_name;   /* Driver-determined */
 199         acpi_device_class device_class; /*        "          */
 200 };
 201
 202 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 203 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 204 #define acpi_device_hid(d)      ((d)->pnp.hardware_id)
 205 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 206 #define acpi_device_name(d)     ((d)->pnp.device_name)
 207 #define acpi_device_class(d)    ((d)->pnp.device_class)
 208
 209 /* Power Management */
 210
 211 struct acpi_device_power_flags {
 212         u32 explicit_get:1;     /* _PSC present? */
 213         u32 power_resources:1;  /* Power resources */
 214         u32 inrush_current:1;   /* Serialize Dx->D0 */
 215         u32 power_removed:1;    /* Optimize Dx->D0 */
 216         u32 reserved:28;
 217 };
 218
 219 struct acpi_device_power_state {
 220         struct {
 221                 u8 valid:1;
 222                 u8 explicit_set:1;      /* _PSx present? */
 223                 u8 reserved:6;
 224         } flags;
 225         int power;              /* % Power (compared to D0) */
 226         int latency;            /* Dx->D0 time (microseconds) */
 227         struct acpi_handle_list resources;      /* Power resources referenced */
 228 };
 229
 230 struct acpi_device_power {
 231         int state;              /* Current state */
 232         struct acpi_device_power_flags flags;
 233         struct acpi_device_power_state states[4];       /* Power states (D0-D3) */
 234 };
 235
 236 /* Performance Management */
 237
 238 struct acpi_device_perf_flags {
 239         u8 reserved:8;
 240 };
 241
 242 struct acpi_device_perf_state {
 243         struct {
 244                 u8 valid:1;
 245                 u8 reserved:7;
 246         } flags;
 247         u8 power;               /* % Power (compared to P0) */
 248         u8 performance;         /* % Performance (    "   ) */
 249         int latency;            /* Px->P0 time (microseconds) */
 250 };
 251
 252 struct acpi_device_perf {
 253         int state;
 254         struct acpi_device_perf_flags flags;
 255         int state_count;
 256         struct acpi_device_perf_state *states;
 257 };
 258
 259 /* Wakeup Management */
 260 struct acpi_device_wakeup_flags {
 261         u8 valid:1;             /* Can successfully enable wakeup? */
 262         u8 prepared:1;          /* Has the wake-up capability been enabled? */
 263         u8 run_wake:1;          /* Run-Wake GPE devices */
 264 };
 265
 266 struct acpi_device_wakeup_state {
 267         u8 enabled:1;
 268 };
 269
 270 struct acpi_device_wakeup {
 271         acpi_handle gpe_device;
 272         acpi_integer gpe_number;
 273         acpi_integer sleep_state;
 274         struct acpi_handle_list resources;
 275         struct acpi_device_wakeup_state state;
 276         struct acpi_device_wakeup_flags flags;
 277 };
 278
 279 /* Device */
 280
 281 struct acpi_device {
 282         acpi_handle handle;
 283         struct acpi_device *parent;
 284         struct list_head children;
 285         struct list_head node;
 286         struct list_head wakeup_list;
 287         struct list_head g_list;
 288         struct acpi_device_status status;
 289         struct acpi_device_flags flags;
 290         struct acpi_device_pnp pnp;
 291         struct acpi_device_power power;
 292         struct acpi_device_wakeup wakeup;
 293         struct acpi_device_perf performance;
 294         struct acpi_device_dir dir;
 295         struct acpi_device_ops ops;
 296         struct acpi_driver *driver;
 297         void *driver_data;
 298         struct device dev;
 299         struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 300         enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 301 };
 302
 303 static inline void *acpi_driver_data(struct acpi_device *d)
 304 {
 305         return d->driver_data;
 306 }
 307
 308 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 309 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 310
 311 /* acpi_device.dev.bus == &acpi_bus_type */
 312 extern struct bus_type acpi_bus_type;
 313
 314 /*
 315  * Events
 316  * ------
 317  */
 318
 319 struct acpi_bus_event {
 320         struct list_head node;
 321         acpi_device_class device_class;
 322         acpi_bus_id bus_id;
 323         u32 type;
 324         u32 data;
 325 };
 326
 327 extern struct kobject *acpi_kobj;
 328 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 329 void acpi_bus_private_data_handler(acpi_handle, u32, void *);
 330 int acpi_bus_get_private_data(acpi_handle, void **);
 331 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 332 extern int register_acpi_notifier(struct notifier_block *);
 333 extern int unregister_acpi_notifier(struct notifier_block *);
 334
 335 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 336 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 337 /*
 338  * External Functions
 339  */
 340
 341 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 342 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 343 int acpi_bus_get_status(struct acpi_device *device);
 344 int acpi_bus_get_power(acpi_handle handle, int *state);
 345 int acpi_bus_set_power(acpi_handle handle, int state);
 346 bool acpi_bus_power_manageable(acpi_handle handle);
 347 bool acpi_bus_can_wakeup(acpi_handle handle);
 348 #ifdef CONFIG_ACPI_PROC_EVENT
 349 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 350 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 351 int acpi_bus_receive_event(struct acpi_bus_event *event);
 352 #else
 353 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 354         { return 0; }
 355 #endif
 356 int acpi_bus_register_driver(struct acpi_driver *driver);
 357 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 358 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 359                  acpi_handle handle, int type);
 360 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 361 int acpi_bus_start(struct acpi_device *device);
 362 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 363 int acpi_match_device_ids(struct acpi_device *device,
 364                           const struct acpi_device_id *ids);
 365 int acpi_create_dir(struct acpi_device *);
 366 void acpi_remove_dir(struct acpi_device *);
 367
 368 /*
 369  * Bind physical devices with ACPI devices
 370  */
 371 #include <linux/device.h>
 372 struct acpi_bus_type {
 373         struct list_head list;
 374         struct bus_type *bus;
 375         /* For general devices under the bus */
 376         int (*find_device) (struct device *, acpi_handle *);
 377         /* For bridges, such as PCI root bridge, IDE controller */
 378         int (*find_bridge) (struct device *, acpi_handle *);
 379 };
 380 int register_acpi_bus_type(struct acpi_bus_type *);
 381 int unregister_acpi_bus_type(struct acpi_bus_type *);
 382 struct device *acpi_get_physical_device(acpi_handle);
 383 struct device *acpi_get_physical_pci_device(acpi_handle);
 384
 385 /* helper */
 386 acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 387 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 388 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 389
 390 #ifdef CONFIG_PM_SLEEP
 391 int acpi_pm_device_sleep_state(struct device *, int *);
 392 int acpi_pm_device_sleep_wake(struct device *, bool);
 393 #else /* !CONFIG_PM_SLEEP */
 394 static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 395 {
 396         if (p)
 397                 *p = ACPI_STATE_D0;
 398         return ACPI_STATE_D3;
 399 }
 400 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 401 {
 402         return -ENODEV;
 403 }
 404 #endif /* !CONFIG_PM_SLEEP */
 405
 406 #endif                          /* CONFIG_ACPI */
 407
 408 #endif /*__ACPI_BUS_H__*/