LXR linux/include/acpi/acpi

   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/* TBD: Make dynamic */
  34#define ACPI_MAX_HANDLES        10
  35struct acpi_handle_list {
  36        u32 count;
  37        acpi_handle handles[ACPI_MAX_HANDLES];
  38};
  39
  40/* acpi_utils.h */
  41acpi_status
  42acpi_extract_package(union acpi_object *package,
  43                     struct acpi_buffer *format, struct acpi_buffer *buffer);
  44acpi_status
  45acpi_evaluate_integer(acpi_handle handle,
  46                      acpi_string pathname,
  47                      struct acpi_object_list *arguments, unsigned long long *data);
  48acpi_status
  49acpi_evaluate_reference(acpi_handle handle,
  50                        acpi_string pathname,
  51                        struct acpi_object_list *arguments,
  52                        struct acpi_handle_list *list);
  53
  54#ifdef CONFIG_ACPI
  55
  56#include <linux/proc_fs.h>
  57
  58#define ACPI_BUS_FILE_ROOT      "acpi"
  59extern struct proc_dir_entry *acpi_root_dir;
  60
  61enum acpi_bus_removal_type {
  62        ACPI_BUS_REMOVAL_NORMAL = 0,
  63        ACPI_BUS_REMOVAL_EJECT,
  64        ACPI_BUS_REMOVAL_SUPRISE,
  65        ACPI_BUS_REMOVAL_TYPE_COUNT
  66};
  67
  68enum acpi_bus_device_type {
  69        ACPI_BUS_TYPE_DEVICE = 0,
  70        ACPI_BUS_TYPE_POWER,
  71        ACPI_BUS_TYPE_PROCESSOR,
  72        ACPI_BUS_TYPE_THERMAL,
  73        ACPI_BUS_TYPE_POWER_BUTTON,
  74        ACPI_BUS_TYPE_SLEEP_BUTTON,
  75        ACPI_BUS_DEVICE_TYPE_COUNT
  76};
  77
  78struct acpi_driver;
  79struct acpi_device;
  80
  81/*
  82 * ACPI Driver
  83 * -----------
  84 */
  85
  86typedef int (*acpi_op_add) (struct acpi_device * device);
  87typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
  88typedef int (*acpi_op_start) (struct acpi_device * device);
  89typedef int (*acpi_op_suspend) (struct acpi_device * device,
  90                                pm_message_t state);
  91typedef int (*acpi_op_resume) (struct acpi_device * device);
  92typedef int (*acpi_op_bind) (struct acpi_device * device);
  93typedef int (*acpi_op_unbind) (struct acpi_device * device);
  94typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  95
  96struct acpi_bus_ops {
  97        u32 acpi_op_add:1;
  98        u32 acpi_op_start:1;
  99};
 100
 101struct acpi_device_ops {
 102        acpi_op_add add;
 103        acpi_op_remove remove;
 104        acpi_op_start start;
 105        acpi_op_suspend suspend;
 106        acpi_op_resume resume;
 107        acpi_op_bind bind;
 108        acpi_op_unbind unbind;
 109        acpi_op_notify notify;
 110};
 111
 112#define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 113
 114struct acpi_driver {
 115        char name[80];
 116        char class[80];
 117        const struct acpi_device_id *ids; /* Supported Hardware IDs */
 118        unsigned int flags;
 119        struct acpi_device_ops ops;
 120        struct device_driver drv;
 121        struct module *owner;
 122};
 123
 124/*
 125 * ACPI Device
 126 * -----------
 127 */
 128
 129/* Status (_STA) */
 130
 131struct acpi_device_status {
 132        u32 present:1;
 133        u32 enabled:1;
 134        u32 show_in_ui:1;
 135        u32 functional:1;
 136        u32 battery_present:1;
 137        u32 reserved:27;
 138};
 139
 140/* Flags */
 141
 142struct acpi_device_flags {
 143        u32 dynamic_status:1;
 144        u32 bus_address:1;
 145        u32 removable:1;
 146        u32 ejectable:1;
 147        u32 lockable:1;
 148        u32 suprise_removal_ok:1;
 149        u32 power_manageable:1;
 150        u32 performance_manageable:1;
 151        u32 wake_capable:1;     /* Wakeup(_PRW) supported? */
 152        u32 force_power_state:1;
 153        u32 reserved:22;
 154};
 155
 156/* File System */
 157
 158struct acpi_device_dir {
 159        struct proc_dir_entry *entry;
 160};
 161
 162#define acpi_device_dir(d)      ((d)->dir.entry)
 163
 164/* Plug and Play */
 165
 166typedef char acpi_bus_id[8];
 167typedef unsigned long acpi_bus_address;
 168typedef char acpi_device_name[40];
 169typedef char acpi_device_class[20];
 170
 171struct acpi_hardware_id {
 172        struct list_head list;
 173        char *id;
 174};
 175
 176struct acpi_device_pnp {
 177        acpi_bus_id bus_id;     /* Object name */
 178        acpi_bus_address bus_address;   /* _ADR */
 179        char *unique_id;        /* _UID */
 180        struct list_head ids;           /* _HID and _CIDs */
 181        acpi_device_name device_name;   /* Driver-determined */
 182        acpi_device_class device_class; /*        "          */
 183};
 184
 185#define acpi_device_bid(d)      ((d)->pnp.bus_id)
 186#define acpi_device_adr(d)      ((d)->pnp.bus_address)
 187char *acpi_device_hid(struct acpi_device *device);
 188#define acpi_device_name(d)     ((d)->pnp.device_name)
 189#define acpi_device_class(d)    ((d)->pnp.device_class)
 190
 191/* Power Management */
 192
 193struct acpi_device_power_flags {
 194        u32 explicit_get:1;     /* _PSC present? */
 195        u32 power_resources:1;  /* Power resources */
 196        u32 inrush_current:1;   /* Serialize Dx->D0 */
 197        u32 power_removed:1;    /* Optimize Dx->D0 */
 198        u32 reserved:28;
 199};
 200
 201struct acpi_device_power_state {
 202        struct {
 203                u8 valid:1;
 204                u8 explicit_set:1;      /* _PSx present? */
 205                u8 reserved:6;
 206        } flags;
 207        int power;              /* % Power (compared to D0) */
 208        int latency;            /* Dx->D0 time (microseconds) */
 209        struct acpi_handle_list resources;      /* Power resources referenced */
 210};
 211
 212struct acpi_device_power {
 213        int state;              /* Current state */
 214        struct acpi_device_power_flags flags;
 215        struct acpi_device_power_state states[4];       /* Power states (D0-D3) */
 216};
 217
 218/* Performance Management */
 219
 220struct acpi_device_perf_flags {
 221        u8 reserved:8;
 222};
 223
 224struct acpi_device_perf_state {
 225        struct {
 226                u8 valid:1;
 227                u8 reserved:7;
 228        } flags;
 229        u8 power;               /* % Power (compared to P0) */
 230        u8 performance;         /* % Performance (    "   ) */
 231        int latency;            /* Px->P0 time (microseconds) */
 232};
 233
 234struct acpi_device_perf {
 235        int state;
 236        struct acpi_device_perf_flags flags;
 237        int state_count;
 238        struct acpi_device_perf_state *states;
 239};
 240
 241/* Wakeup Management */
 242struct acpi_device_wakeup_flags {
 243        u8 valid:1;             /* Can successfully enable wakeup? */
 244        u8 run_wake:1;          /* Run-Wake GPE devices */
 245};
 246
 247struct acpi_device_wakeup_state {
 248        u8 enabled:1;
 249};
 250
 251struct acpi_device_wakeup {
 252        acpi_handle gpe_device;
 253        acpi_integer gpe_number;
 254        acpi_integer sleep_state;
 255        struct acpi_handle_list resources;
 256        struct acpi_device_wakeup_state state;
 257        struct acpi_device_wakeup_flags flags;
 258        int prepare_count;
 259};
 260
 261/* Device */
 262
 263struct acpi_device {
 264        int device_type;
 265        acpi_handle handle;             /* no handle for fixed hardware */
 266        struct acpi_device *parent;
 267        struct list_head children;
 268        struct list_head node;
 269        struct list_head wakeup_list;
 270        struct acpi_device_status status;
 271        struct acpi_device_flags flags;
 272        struct acpi_device_pnp pnp;
 273        struct acpi_device_power power;
 274        struct acpi_device_wakeup wakeup;
 275        struct acpi_device_perf performance;
 276        struct acpi_device_dir dir;
 277        struct acpi_device_ops ops;
 278        struct acpi_driver *driver;
 279        void *driver_data;
 280        struct device dev;
 281        struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 282        enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 283};
 284
 285static inline void *acpi_driver_data(struct acpi_device *d)
 286{
 287        return d->driver_data;
 288}
 289
 290#define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 291#define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 292
 293/* acpi_device.dev.bus == &acpi_bus_type */
 294extern struct bus_type acpi_bus_type;
 295
 296/*
 297 * Events
 298 * ------
 299 */
 300
 301struct acpi_bus_event {
 302        struct list_head node;
 303        acpi_device_class device_class;
 304        acpi_bus_id bus_id;
 305        u32 type;
 306        u32 data;
 307};
 308
 309extern struct kobject *acpi_kobj;
 310extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 311void acpi_bus_private_data_handler(acpi_handle, void *);
 312int acpi_bus_get_private_data(acpi_handle, void **);
 313extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 314extern int register_acpi_notifier(struct notifier_block *);
 315extern int unregister_acpi_notifier(struct notifier_block *);
 316
 317extern int register_acpi_bus_notifier(struct notifier_block *nb);
 318extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 319/*
 320 * External Functions
 321 */
 322
 323int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 324void acpi_bus_data_handler(acpi_handle handle, void *context);
 325acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 326                                       unsigned long long *sta);
 327int acpi_bus_get_status(struct acpi_device *device);
 328int acpi_bus_get_power(acpi_handle handle, int *state);
 329int acpi_bus_set_power(acpi_handle handle, int state);
 330bool acpi_bus_power_manageable(acpi_handle handle);
 331bool acpi_bus_can_wakeup(acpi_handle handle);
 332#ifdef CONFIG_ACPI_PROC_EVENT
 333int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 334int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 335int acpi_bus_receive_event(struct acpi_bus_event *event);
 336#else
 337static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 338        { return 0; }
 339#endif
 340int acpi_bus_register_driver(struct acpi_driver *driver);
 341void acpi_bus_unregister_driver(struct acpi_driver *driver);
 342int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 343                 acpi_handle handle, int type);
 344int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 345int acpi_bus_start(struct acpi_device *device);
 346acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 347int acpi_match_device_ids(struct acpi_device *device,
 348                          const struct acpi_device_id *ids);
 349int acpi_create_dir(struct acpi_device *);
 350void acpi_remove_dir(struct acpi_device *);
 351
 352/*
 353 * Bind physical devices with ACPI devices
 354 */
 355struct acpi_bus_type {
 356        struct list_head list;
 357        struct bus_type *bus;
 358        /* For general devices under the bus */
 359        int (*find_device) (struct device *, acpi_handle *);
 360        /* For bridges, such as PCI root bridge, IDE controller */
 361        int (*find_bridge) (struct device *, acpi_handle *);
 362};
 363int register_acpi_bus_type(struct acpi_bus_type *);
 364int unregister_acpi_bus_type(struct acpi_bus_type *);
 365struct device *acpi_get_physical_device(acpi_handle);
 366
 367struct acpi_pci_root {
 368        struct list_head node;
 369        struct acpi_device * device;
 370        struct acpi_pci_id id;
 371        struct pci_bus *bus;
 372        u16 segment;
 373        u8 bus_nr;
 374
 375        u32 osc_support_set;    /* _OSC state of support bits */
 376        u32 osc_control_set;    /* _OSC state of control bits */
 377        u32 osc_control_qry;    /* the latest _OSC query result */
 378
 379        u32 osc_queried:1;      /* has _OSC control been queried? */
 380};
 381
 382/* helper */
 383acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 384int acpi_is_root_bridge(acpi_handle);
 385acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 386struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 387#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 388
 389#ifdef CONFIG_PM_SLEEP
 390int acpi_pm_device_sleep_state(struct device *, int *);
 391int acpi_pm_device_sleep_wake(struct device *, bool);
 392#else /* !CONFIG_PM_SLEEP */
 393static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 394{
 395        if (p)
 396                *p = ACPI_STATE_D0;
 397        return ACPI_STATE_D3;
 398}
 399static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 400{
 401        return -ENODEV;
 402}
 403#endif /* !CONFIG_PM_SLEEP */
 404
 405#endif                          /* CONFIG_ACPI */
 406
 407#endif /*__ACPI_BUS_H__*/
 408