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
  57struct acpi_pld {
  58        unsigned int revision:7; /* 0 */
  59        unsigned int ignore_colour:1; /* 7 */
  60        unsigned int colour:24; /* 8 */
  61        unsigned int width:16; /* 32 */
  62        unsigned int height:16; /* 48 */
  63        unsigned int user_visible:1; /* 64 */
  64        unsigned int dock:1; /* 65 */
  65        unsigned int lid:1; /* 66 */
  66        unsigned int panel:3; /* 67 */
  67        unsigned int vertical_pos:2; /* 70 */
  68        unsigned int horizontal_pos:2; /* 72 */
  69        unsigned int shape:4; /* 74 */
  70        unsigned int group_orientation:1; /* 78 */
  71        unsigned int group_token:8; /* 79 */
  72        unsigned int group_position:8; /* 87 */
  73        unsigned int bay:1; /* 95 */
  74        unsigned int ejectable:1; /* 96 */
  75        unsigned int ospm_eject_required:1; /* 97 */
  76        unsigned int cabinet_number:8; /* 98 */
  77        unsigned int card_cage_number:8; /* 106 */
  78        unsigned int reference:1; /* 114 */
  79        unsigned int rotation:4; /* 115 */
  80        unsigned int order:5; /* 119 */
  81        unsigned int reserved:4; /* 124 */
  82        unsigned int vertical_offset:16; /* 128 */
  83        unsigned int horizontal_offset:16; /* 144 */
  84} __attribute__((__packed__));
  85
  86acpi_status
  87acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld);
  88#ifdef CONFIG_ACPI
  89
  90#include <linux/proc_fs.h>
  91
  92#define ACPI_BUS_FILE_ROOT      "acpi"
  93extern struct proc_dir_entry *acpi_root_dir;
  94
  95enum acpi_bus_removal_type {
  96        ACPI_BUS_REMOVAL_NORMAL = 0,
  97        ACPI_BUS_REMOVAL_EJECT,
  98        ACPI_BUS_REMOVAL_SUPRISE,
  99        ACPI_BUS_REMOVAL_TYPE_COUNT
 100};
 101
 102enum acpi_bus_device_type {
 103        ACPI_BUS_TYPE_DEVICE = 0,
 104        ACPI_BUS_TYPE_POWER,
 105        ACPI_BUS_TYPE_PROCESSOR,
 106        ACPI_BUS_TYPE_THERMAL,
 107        ACPI_BUS_TYPE_POWER_BUTTON,
 108        ACPI_BUS_TYPE_SLEEP_BUTTON,
 109        ACPI_BUS_DEVICE_TYPE_COUNT
 110};
 111
 112struct acpi_driver;
 113struct acpi_device;
 114
 115/*
 116 * ACPI Driver
 117 * -----------
 118 */
 119
 120typedef int (*acpi_op_add) (struct acpi_device * device);
 121typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
 122typedef int (*acpi_op_start) (struct acpi_device * device);
 123typedef int (*acpi_op_bind) (struct acpi_device * device);
 124typedef int (*acpi_op_unbind) (struct acpi_device * device);
 125typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 126
 127struct acpi_bus_ops {
 128        u32 acpi_op_add:1;
 129        u32 acpi_op_start:1;
 130};
 131
 132struct acpi_device_ops {
 133        acpi_op_add add;
 134        acpi_op_remove remove;
 135        acpi_op_start start;
 136        acpi_op_bind bind;
 137        acpi_op_unbind unbind;
 138        acpi_op_notify notify;
 139};
 140
 141#define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 142
 143struct acpi_driver {
 144        char name[80];
 145        char class[80];
 146        const struct acpi_device_id *ids; /* Supported Hardware IDs */
 147        unsigned int flags;
 148        struct acpi_device_ops ops;
 149        struct device_driver drv;
 150        struct module *owner;
 151};
 152
 153/*
 154 * ACPI Device
 155 * -----------
 156 */
 157
 158/* Status (_STA) */
 159
 160struct acpi_device_status {
 161        u32 present:1;
 162        u32 enabled:1;
 163        u32 show_in_ui:1;
 164        u32 functional:1;
 165        u32 battery_present:1;
 166        u32 reserved:27;
 167};
 168
 169/* Flags */
 170
 171struct acpi_device_flags {
 172        u32 dynamic_status:1;
 173        u32 bus_address:1;
 174        u32 removable:1;
 175        u32 ejectable:1;
 176        u32 lockable:1;
 177        u32 suprise_removal_ok:1;
 178        u32 power_manageable:1;
 179        u32 performance_manageable:1;
 180        u32 eject_pending:1;
 181        u32 reserved:23;
 182};
 183
 184/* File System */
 185
 186struct acpi_device_dir {
 187        struct proc_dir_entry *entry;
 188};
 189
 190#define acpi_device_dir(d)      ((d)->dir.entry)
 191
 192/* Plug and Play */
 193
 194typedef char acpi_bus_id[8];
 195typedef unsigned long acpi_bus_address;
 196typedef char acpi_device_name[40];
 197typedef char acpi_device_class[20];
 198
 199struct acpi_hardware_id {
 200        struct list_head list;
 201        char *id;
 202};
 203
 204struct acpi_device_pnp {
 205        acpi_bus_id bus_id;     /* Object name */
 206        acpi_bus_address bus_address;   /* _ADR */
 207        char *unique_id;        /* _UID */
 208        struct list_head ids;           /* _HID and _CIDs */
 209        acpi_device_name device_name;   /* Driver-determined */
 210        acpi_device_class device_class; /*        "          */
 211};
 212
 213#define acpi_device_bid(d)      ((d)->pnp.bus_id)
 214#define acpi_device_adr(d)      ((d)->pnp.bus_address)
 215const char *acpi_device_hid(struct acpi_device *device);
 216#define acpi_device_name(d)     ((d)->pnp.device_name)
 217#define acpi_device_class(d)    ((d)->pnp.device_class)
 218
 219/* Power Management */
 220
 221struct acpi_device_power_flags {
 222        u32 explicit_get:1;     /* _PSC present? */
 223        u32 power_resources:1;  /* Power resources */
 224        u32 inrush_current:1;   /* Serialize Dx->D0 */
 225        u32 power_removed:1;    /* Optimize Dx->D0 */
 226        u32 reserved:28;
 227};
 228
 229struct acpi_device_power_state {
 230        struct {
 231                u8 valid:1;
 232                u8 explicit_set:1;      /* _PSx present? */
 233                u8 reserved:6;
 234        } flags;
 235        int power;              /* % Power (compared to D0) */
 236        int latency;            /* Dx->D0 time (microseconds) */
 237        struct acpi_handle_list resources;      /* Power resources referenced */
 238};
 239
 240struct acpi_device_power {
 241        int state;              /* Current state */
 242        struct acpi_device_power_flags flags;
 243        struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
 244};
 245
 246/* Performance Management */
 247
 248struct acpi_device_perf_flags {
 249        u8 reserved:8;
 250};
 251
 252struct acpi_device_perf_state {
 253        struct {
 254                u8 valid:1;
 255                u8 reserved:7;
 256        } flags;
 257        u8 power;               /* % Power (compared to P0) */
 258        u8 performance;         /* % Performance (    "   ) */
 259        int latency;            /* Px->P0 time (microseconds) */
 260};
 261
 262struct acpi_device_perf {
 263        int state;
 264        struct acpi_device_perf_flags flags;
 265        int state_count;
 266        struct acpi_device_perf_state *states;
 267};
 268
 269/* Wakeup Management */
 270struct acpi_device_wakeup_flags {
 271        u8 valid:1;             /* Can successfully enable wakeup? */
 272        u8 run_wake:1;          /* Run-Wake GPE devices */
 273        u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 274};
 275
 276struct acpi_device_wakeup {
 277        acpi_handle gpe_device;
 278        u64 gpe_number;
 279        u64 sleep_state;
 280        struct acpi_handle_list resources;
 281        struct acpi_device_wakeup_flags flags;
 282        int prepare_count;
 283};
 284
 285/* Device */
 286
 287struct acpi_device {
 288        int device_type;
 289        acpi_handle handle;             /* no handle for fixed hardware */
 290        struct acpi_device *parent;
 291        struct list_head children;
 292        struct list_head node;
 293        struct list_head wakeup_list;
 294        struct acpi_device_status status;
 295        struct acpi_device_flags flags;
 296        struct acpi_device_pnp pnp;
 297        struct acpi_device_power power;
 298        struct acpi_device_wakeup wakeup;
 299        struct acpi_device_perf performance;
 300        struct acpi_device_dir dir;
 301        struct acpi_device_ops ops;
 302        struct acpi_driver *driver;
 303        void *driver_data;
 304        struct device dev;
 305        struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 306        enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 307};
 308
 309static inline void *acpi_driver_data(struct acpi_device *d)
 310{
 311        return d->driver_data;
 312}
 313
 314#define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 315#define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 316
 317/* acpi_device.dev.bus == &acpi_bus_type */
 318extern struct bus_type acpi_bus_type;
 319
 320/*
 321 * Events
 322 * ------
 323 */
 324
 325struct acpi_bus_event {
 326        struct list_head node;
 327        acpi_device_class device_class;
 328        acpi_bus_id bus_id;
 329        u32 type;
 330        u32 data;
 331};
 332
 333struct acpi_eject_event {
 334        acpi_handle     handle;
 335        u32             event;
 336};
 337
 338extern struct kobject *acpi_kobj;
 339extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 340void acpi_bus_private_data_handler(acpi_handle, void *);
 341int acpi_bus_get_private_data(acpi_handle, void **);
 342extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 343extern int register_acpi_notifier(struct notifier_block *);
 344extern int unregister_acpi_notifier(struct notifier_block *);
 345
 346extern int register_acpi_bus_notifier(struct notifier_block *nb);
 347extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 348/*
 349 * External Functions
 350 */
 351
 352int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 353void acpi_bus_data_handler(acpi_handle handle, void *context);
 354acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 355                                       unsigned long long *sta);
 356int acpi_bus_get_status(struct acpi_device *device);
 357int acpi_bus_set_power(acpi_handle handle, int state);
 358int acpi_bus_update_power(acpi_handle handle, int *state_p);
 359bool acpi_bus_power_manageable(acpi_handle handle);
 360bool acpi_bus_can_wakeup(acpi_handle handle);
 361int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
 362void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
 363#ifdef CONFIG_ACPI_PROC_EVENT
 364int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 365int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 366int acpi_bus_receive_event(struct acpi_bus_event *event);
 367#else
 368static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 369        { return 0; }
 370#endif
 371int acpi_bus_register_driver(struct acpi_driver *driver);
 372void acpi_bus_unregister_driver(struct acpi_driver *driver);
 373int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 374                 acpi_handle handle, int type);
 375void acpi_bus_hot_remove_device(void *context);
 376int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 377int acpi_bus_start(struct acpi_device *device);
 378acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 379int acpi_match_device_ids(struct acpi_device *device,
 380                          const struct acpi_device_id *ids);
 381int acpi_create_dir(struct acpi_device *);
 382void acpi_remove_dir(struct acpi_device *);
 383
 384/*
 385 * Bind physical devices with ACPI devices
 386 */
 387struct acpi_bus_type {
 388        struct list_head list;
 389        struct bus_type *bus;
 390        /* For general devices under the bus */
 391        int (*find_device) (struct device *, acpi_handle *);
 392        /* For bridges, such as PCI root bridge, IDE controller */
 393        int (*find_bridge) (struct device *, acpi_handle *);
 394};
 395int register_acpi_bus_type(struct acpi_bus_type *);
 396int unregister_acpi_bus_type(struct acpi_bus_type *);
 397struct device *acpi_get_physical_device(acpi_handle);
 398
 399struct acpi_pci_root {
 400        struct list_head node;
 401        struct acpi_device * device;
 402        struct acpi_pci_id id;
 403        struct pci_bus *bus;
 404        u16 segment;
 405        struct resource secondary;      /* downstream bus range */
 406
 407        u32 osc_support_set;    /* _OSC state of support bits */
 408        u32 osc_control_set;    /* _OSC state of control bits */
 409        phys_addr_t mcfg_addr;
 410};
 411
 412/* helper */
 413acpi_handle acpi_get_child(acpi_handle, u64);
 414int acpi_is_root_bridge(acpi_handle);
 415acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 416struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 417#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 418
 419int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 420int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 421
 422#ifdef CONFIG_PM
 423int acpi_pm_device_sleep_state(struct device *, int *, int);
 424#else
 425static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 426{
 427        if (p)
 428                *p = ACPI_STATE_D0;
 429        return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0;
 430}
 431#endif
 432
 433#ifdef CONFIG_PM_SLEEP
 434int acpi_pm_device_run_wake(struct device *, bool);
 435int acpi_pm_device_sleep_wake(struct device *, bool);
 436#else
 437static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 438{
 439        return -ENODEV;
 440}
 441static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 442{
 443        return -ENODEV;
 444}
 445#endif
 446
 447#else   /* CONFIG_ACPI */
 448
 449static inline int register_acpi_bus_type(void *bus) { return 0; }
 450static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 451
 452#endif                          /* CONFIG_ACPI */
 453
 454#endif /*__ACPI_BUS_H__*/
 455
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