linux/include/acpi/acpi_bus.h
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   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);
  53acpi_status
  54acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
  55                        u32 status_code, struct acpi_buffer *status_buf);
  56
  57acpi_status
  58acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
  59#ifdef CONFIG_ACPI
  60
  61#include <linux/proc_fs.h>
  62
  63#define ACPI_BUS_FILE_ROOT      "acpi"
  64extern struct proc_dir_entry *acpi_root_dir;
  65
  66enum acpi_bus_removal_type {
  67        ACPI_BUS_REMOVAL_NORMAL = 0,
  68        ACPI_BUS_REMOVAL_EJECT,
  69        ACPI_BUS_REMOVAL_SUPRISE,
  70        ACPI_BUS_REMOVAL_TYPE_COUNT
  71};
  72
  73enum acpi_bus_device_type {
  74        ACPI_BUS_TYPE_DEVICE = 0,
  75        ACPI_BUS_TYPE_POWER,
  76        ACPI_BUS_TYPE_PROCESSOR,
  77        ACPI_BUS_TYPE_THERMAL,
  78        ACPI_BUS_TYPE_POWER_BUTTON,
  79        ACPI_BUS_TYPE_SLEEP_BUTTON,
  80        ACPI_BUS_DEVICE_TYPE_COUNT
  81};
  82
  83struct acpi_driver;
  84struct acpi_device;
  85
  86/*
  87 * ACPI Driver
  88 * -----------
  89 */
  90
  91typedef int (*acpi_op_add) (struct acpi_device * device);
  92typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
  93typedef int (*acpi_op_start) (struct acpi_device * device);
  94typedef int (*acpi_op_bind) (struct acpi_device * device);
  95typedef int (*acpi_op_unbind) (struct acpi_device * device);
  96typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  97
  98struct acpi_bus_ops {
  99        u32 acpi_op_add:1;
 100        u32 acpi_op_start:1;
 101};
 102
 103struct acpi_device_ops {
 104        acpi_op_add add;
 105        acpi_op_remove remove;
 106        acpi_op_start start;
 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 eject_pending:1;
 152        u32 reserved:23;
 153};
 154
 155/* File System */
 156
 157struct acpi_device_dir {
 158        struct proc_dir_entry *entry;
 159};
 160
 161#define acpi_device_dir(d)      ((d)->dir.entry)
 162
 163/* Plug and Play */
 164
 165typedef char acpi_bus_id[8];
 166typedef unsigned long acpi_bus_address;
 167typedef char acpi_device_name[40];
 168typedef char acpi_device_class[20];
 169
 170struct acpi_hardware_id {
 171        struct list_head list;
 172        char *id;
 173};
 174
 175struct acpi_device_pnp {
 176        acpi_bus_id bus_id;     /* Object name */
 177        acpi_bus_address bus_address;   /* _ADR */
 178        char *unique_id;        /* _UID */
 179        struct list_head ids;           /* _HID and _CIDs */
 180        acpi_device_name device_name;   /* Driver-determined */
 181        acpi_device_class device_class; /*        "          */
 182        union acpi_object *str_obj;     /* unicode string for _STR method */
 183};
 184
 185#define acpi_device_bid(d)      ((d)->pnp.bus_id)
 186#define acpi_device_adr(d)      ((d)->pnp.bus_address)
 187const char *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[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
 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        u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 246};
 247
 248struct acpi_device_wakeup {
 249        acpi_handle gpe_device;
 250        u64 gpe_number;
 251        u64 sleep_state;
 252        struct acpi_handle_list resources;
 253        struct acpi_device_wakeup_flags flags;
 254        int prepare_count;
 255};
 256
 257struct acpi_device_physical_node {
 258        u8 node_id;
 259        struct list_head node;
 260        struct device *dev;
 261};
 262
 263/* set maximum of physical nodes to 32 for expansibility */
 264#define ACPI_MAX_PHYSICAL_NODE  32
 265
 266/* Device */
 267struct acpi_device {
 268        int device_type;
 269        acpi_handle handle;             /* no handle for fixed hardware */
 270        struct acpi_device *parent;
 271        struct list_head children;
 272        struct list_head node;
 273        struct list_head wakeup_list;
 274        struct acpi_device_status status;
 275        struct acpi_device_flags flags;
 276        struct acpi_device_pnp pnp;
 277        struct acpi_device_power power;
 278        struct acpi_device_wakeup wakeup;
 279        struct acpi_device_perf performance;
 280        struct acpi_device_dir dir;
 281        struct acpi_device_ops ops;
 282        struct acpi_driver *driver;
 283        void *driver_data;
 284        struct device dev;
 285        struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 286        enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 287        u8 physical_node_count;
 288        struct list_head physical_node_list;
 289        struct mutex physical_node_lock;
 290        DECLARE_BITMAP(physical_node_id_bitmap, ACPI_MAX_PHYSICAL_NODE);
 291};
 292
 293static inline void *acpi_driver_data(struct acpi_device *d)
 294{
 295        return d->driver_data;
 296}
 297
 298#define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 299#define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 300
 301/* acpi_device.dev.bus == &acpi_bus_type */
 302extern struct bus_type acpi_bus_type;
 303
 304/*
 305 * Events
 306 * ------
 307 */
 308
 309struct acpi_bus_event {
 310        struct list_head node;
 311        acpi_device_class device_class;
 312        acpi_bus_id bus_id;
 313        u32 type;
 314        u32 data;
 315};
 316
 317struct acpi_eject_event {
 318        acpi_handle     handle;
 319        u32             event;
 320};
 321
 322extern struct kobject *acpi_kobj;
 323extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 324void acpi_bus_private_data_handler(acpi_handle, void *);
 325int acpi_bus_get_private_data(acpi_handle, void **);
 326extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 327extern int register_acpi_notifier(struct notifier_block *);
 328extern int unregister_acpi_notifier(struct notifier_block *);
 329
 330extern int register_acpi_bus_notifier(struct notifier_block *nb);
 331extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 332/*
 333 * External Functions
 334 */
 335
 336int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 337void acpi_bus_data_handler(acpi_handle handle, void *context);
 338acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 339                                       unsigned long long *sta);
 340int acpi_bus_get_status(struct acpi_device *device);
 341int acpi_bus_set_power(acpi_handle handle, int state);
 342int acpi_bus_update_power(acpi_handle handle, int *state_p);
 343bool acpi_bus_power_manageable(acpi_handle handle);
 344bool acpi_bus_can_wakeup(acpi_handle handle);
 345int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
 346void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
 347#ifdef CONFIG_ACPI_PROC_EVENT
 348int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 349int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 350int acpi_bus_receive_event(struct acpi_bus_event *event);
 351#else
 352static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 353        { return 0; }
 354#endif
 355int acpi_bus_register_driver(struct acpi_driver *driver);
 356void acpi_bus_unregister_driver(struct acpi_driver *driver);
 357int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 358                 acpi_handle handle, int type);
 359void acpi_bus_hot_remove_device(void *context);
 360int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 361int acpi_bus_start(struct acpi_device *device);
 362acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 363int acpi_match_device_ids(struct acpi_device *device,
 364                          const struct acpi_device_id *ids);
 365int acpi_create_dir(struct acpi_device *);
 366void acpi_remove_dir(struct acpi_device *);
 367
 368
 369/**
 370 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 371 * @__acpi_driver: acpi_driver struct
 372 *
 373 * Helper macro for ACPI drivers which do not do anything special in module
 374 * init/exit. This eliminates a lot of boilerplate. Each module may only
 375 * use this macro once, and calling it replaces module_init() and module_exit()
 376 */
 377#define module_acpi_driver(__acpi_driver) \
 378        module_driver(__acpi_driver, acpi_bus_register_driver, \
 379                      acpi_bus_unregister_driver)
 380
 381/*
 382 * Bind physical devices with ACPI devices
 383 */
 384struct acpi_bus_type {
 385        struct list_head list;
 386        struct bus_type *bus;
 387        /* For general devices under the bus */
 388        int (*find_device) (struct device *, acpi_handle *);
 389        /* For bridges, such as PCI root bridge, IDE controller */
 390        int (*find_bridge) (struct device *, acpi_handle *);
 391};
 392int register_acpi_bus_type(struct acpi_bus_type *);
 393int unregister_acpi_bus_type(struct acpi_bus_type *);
 394
 395struct acpi_pci_root {
 396        struct list_head node;
 397        struct acpi_device * device;
 398        struct acpi_pci_id id;
 399        struct pci_bus *bus;
 400        u16 segment;
 401        struct resource secondary;      /* downstream bus range */
 402
 403        u32 osc_support_set;    /* _OSC state of support bits */
 404        u32 osc_control_set;    /* _OSC state of control bits */
 405        phys_addr_t mcfg_addr;
 406};
 407
 408/* helper */
 409acpi_handle acpi_get_child(acpi_handle, u64);
 410int acpi_is_root_bridge(acpi_handle);
 411acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 412struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 413#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 414
 415int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 416int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 417
 418#ifdef CONFIG_PM
 419int acpi_pm_device_sleep_state(struct device *, int *, int);
 420#else
 421static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 422{
 423        if (p)
 424                *p = ACPI_STATE_D0;
 425        return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0;
 426}
 427#endif
 428
 429#ifdef CONFIG_PM_SLEEP
 430int acpi_pm_device_run_wake(struct device *, bool);
 431int acpi_pm_device_sleep_wake(struct device *, bool);
 432#else
 433static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 434{
 435        return -ENODEV;
 436}
 437static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 438{
 439        return -ENODEV;
 440}
 441#endif
 442
 443#else   /* CONFIG_ACPI */
 444
 445static inline int register_acpi_bus_type(void *bus) { return 0; }
 446static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 447
 448#endif                          /* CONFIG_ACPI */
 449
 450#endif /*__ACPI_BUS_H__*/
 451
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