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/kobject.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
  43 /* acpi_utils.h */
  44 acpi_status
  45 acpi_extract_package (
  46         union acpi_object       *package,
  47         struct acpi_buffer      *format,
  48         struct acpi_buffer      *buffer);
  49 acpi_status
  50 acpi_evaluate_integer (
  51         acpi_handle             handle,
  52         acpi_string             pathname,
  53         struct acpi_object_list *arguments,
  54         unsigned long           *data);
  55 acpi_status
  56 acpi_evaluate_reference (
  57         acpi_handle             handle,
  58         acpi_string             pathname,
  59         struct acpi_object_list *arguments,
  60         struct acpi_handle_list *list);
  61
  62
  63 #ifdef CONFIG_ACPI_BUS
  64
  65 #include <linux/proc_fs.h>
  66
  67 #define ACPI_BUS_FILE_ROOT      "acpi"
  68 extern struct proc_dir_entry    *acpi_root_dir;
  69 extern FADT_DESCRIPTOR          acpi_fadt;
  70
  71 enum acpi_bus_removal_type {
  72         ACPI_BUS_REMOVAL_NORMAL = 0,
  73         ACPI_BUS_REMOVAL_EJECT,
  74         ACPI_BUS_REMOVAL_SUPRISE,
  75         ACPI_BUS_REMOVAL_TYPE_COUNT
  76 };
  77
  78 enum acpi_bus_device_type {
  79         ACPI_BUS_TYPE_DEVICE    = 0,
  80         ACPI_BUS_TYPE_POWER,
  81         ACPI_BUS_TYPE_PROCESSOR,
  82         ACPI_BUS_TYPE_THERMAL,
  83         ACPI_BUS_TYPE_SYSTEM,
  84         ACPI_BUS_TYPE_POWER_BUTTON,
  85         ACPI_BUS_TYPE_SLEEP_BUTTON,
  86         ACPI_BUS_DEVICE_TYPE_COUNT
  87 };
  88
  89 struct acpi_driver;
  90 struct acpi_device;
  91
  92
  93 /*
  94  * ACPI Driver
  95  * -----------
  96  */
  97
  98 typedef int (*acpi_op_add)      (struct acpi_device *device);
  99 typedef int (*acpi_op_remove)   (struct acpi_device *device, int type);
 100 typedef int (*acpi_op_lock)     (struct acpi_device *device, int type);
 101 typedef int (*acpi_op_start)    (struct acpi_device *device);
 102 typedef int (*acpi_op_stop)     (struct acpi_device *device, int type);
 103 typedef int (*acpi_op_suspend)  (struct acpi_device *device, int state);
 104 typedef int (*acpi_op_resume)   (struct acpi_device *device, int state);
 105 typedef int (*acpi_op_scan)     (struct acpi_device *device);
 106 typedef int (*acpi_op_bind)     (struct acpi_device *device);
 107 typedef int (*acpi_op_unbind)   (struct acpi_device *device);
 108 typedef int (*acpi_op_match)    (struct acpi_device *device,
 109                                  struct acpi_driver *driver);
 110
 111 struct acpi_bus_ops {
 112         u32                     acpi_op_add:1;
 113         u32                     acpi_op_remove:1;
 114         u32                     acpi_op_lock:1;
 115         u32                     acpi_op_start:1;
 116         u32                     acpi_op_stop:1;
 117         u32                     acpi_op_suspend:1;
 118         u32                     acpi_op_resume:1;
 119         u32                     acpi_op_scan:1;
 120         u32                     acpi_op_bind:1;
 121         u32                     acpi_op_unbind:1;
 122         u32                     acpi_op_match:1;
 123         u32                     reserved:21;
 124 };
 125
 126 struct acpi_device_ops {
 127         acpi_op_add             add;
 128         acpi_op_remove          remove;
 129         acpi_op_lock            lock;
 130         acpi_op_start           start;
 131         acpi_op_stop            stop;
 132         acpi_op_suspend         suspend;
 133         acpi_op_resume          resume;
 134         acpi_op_scan            scan;
 135         acpi_op_bind            bind;
 136         acpi_op_unbind          unbind;
 137         acpi_op_match           match;
 138 };
 139
 140 struct acpi_driver {
 141         struct list_head        node;
 142         char                    name[80];
 143         char                    class[80];
 144         atomic_t                references;
 145         char                    *ids;           /* Supported Hardware IDs */
 146         struct acpi_device_ops  ops;
 147 };
 148
 149 /*
 150  * ACPI Device
 151  * -----------
 152  */
 153
 154 /* Status (_STA) */
 155
 156 struct acpi_device_status {
 157         u32                     present:1;
 158         u32                     enabled:1;
 159         u32                     show_in_ui:1;
 160         u32                     functional:1;
 161         u32                     battery_present:1;
 162         u32                     reserved:27;
 163 };
 164
 165
 166 /* Flags */
 167
 168 struct acpi_device_flags {
 169         u32                     dynamic_status:1;
 170         u32                     hardware_id:1;
 171         u32                     compatible_ids:1;
 172         u32                     bus_address:1;
 173         u32                     unique_id: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                     wake_capable:1; /* Wakeup(_PRW) supported? */
 181         u32                     reserved:20;
 182 };
 183
 184
 185 /* File System */
 186
 187 struct acpi_device_dir {
 188         struct proc_dir_entry   *entry;
 189 };
 190
 191 #define acpi_device_dir(d)      ((d)->dir.entry)
 192
 193
 194 /* Plug and Play */
 195
 196 typedef char                    acpi_bus_id[5];
 197 typedef unsigned long           acpi_bus_address;
 198 typedef char                    acpi_hardware_id[9];
 199 typedef char                    acpi_unique_id[9];
 200 typedef char                    acpi_device_name[40];
 201 typedef char                    acpi_device_class[20];
 202
 203 struct acpi_device_pnp {
 204         acpi_bus_id             bus_id;                        /* Object name */
 205         acpi_bus_address        bus_address;                          /* _ADR */
 206         acpi_hardware_id        hardware_id;                          /* _HID */
 207         struct acpi_compatible_id_list *cid_list;                    /* _CIDs */
 208         acpi_unique_id          unique_id;                            /* _UID */
 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)
 215 #define acpi_device_hid(d)      ((d)->pnp.hardware_id)
 216 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 217 #define acpi_device_name(d)     ((d)->pnp.device_name)
 218 #define acpi_device_class(d)    ((d)->pnp.device_class)
 219
 220
 221 /* Power Management */
 222
 223 struct acpi_device_power_flags {
 224         u32                     explicit_get:1;              /* _PSC present? */
 225         u32                     power_resources:1;         /* Power resources */
 226         u32                     inrush_current:1;         /* Serialize Dx->D0 */
 227         u32                     power_removed:1;           /* Optimize Dx->D0 */
 228         u32                     reserved:28;
 229 };
 230
 231 struct acpi_device_power_state {
 232         struct {
 233                 u8                      valid:1;
 234                 u8                      explicit_set:1;      /* _PSx present? */
 235                 u8                      reserved:6;
 236         }                       flags;
 237         int                     power;            /* % Power (compared to D0) */
 238         int                     latency;        /* Dx->D0 time (microseconds) */
 239         struct acpi_handle_list resources;      /* Power resources referenced */
 240 };
 241
 242 struct acpi_device_power {
 243         int                     state;                       /* Current state */
 244         struct acpi_device_power_flags flags;
 245         struct acpi_device_power_state states[4];     /* Power states (D0-D3) */
 246 };
 247
 248
 249 /* Performance Management */
 250
 251 struct acpi_device_perf_flags {
 252         u8                      reserved:8;
 253 };
 254
 255 struct acpi_device_perf_state {
 256         struct {
 257                 u8                      valid:1;
 258                 u8                      reserved:7;
 259         }                       flags;
 260         u8                      power;            /* % Power (compared to P0) */
 261         u8                      performance;      /* % Performance (    "   ) */
 262         int                     latency;        /* Px->P0 time (microseconds) */
 263 };
 264
 265 struct acpi_device_perf {
 266         int                     state;
 267         struct acpi_device_perf_flags flags;
 268         int                     state_count;
 269         struct acpi_device_perf_state *states;
 270 };
 271
 272 /* Wakeup Management */
 273 struct acpi_device_wakeup_flags {
 274         u8      valid:1; /* Can successfully enable wakeup? */
 275         u8      run_wake:1; /* Run-Wake GPE devices */
 276 };
 277
 278 struct acpi_device_wakeup_state {
 279         u8      enabled:1;
 280         u8      active:1;
 281 };
 282
 283 struct acpi_device_wakeup {
 284         acpi_handle             gpe_device;
 285         acpi_integer            gpe_number;;
 286         acpi_integer            sleep_state;
 287         struct acpi_handle_list resources;
 288         struct acpi_device_wakeup_state state;
 289         struct acpi_device_wakeup_flags flags;
 290 };
 291
 292 /* Device */
 293
 294 struct acpi_device {
 295         acpi_handle             handle;
 296         struct acpi_device      *parent;
 297         struct list_head        children;
 298         struct list_head        node;
 299         struct list_head        wakeup_list;
 300         struct list_head        g_list;
 301         struct acpi_device_status status;
 302         struct acpi_device_flags flags;
 303         struct acpi_device_pnp  pnp;
 304         struct acpi_device_power power;
 305         struct acpi_device_wakeup wakeup;
 306         struct acpi_device_perf performance;
 307         struct acpi_device_dir  dir;
 308         struct acpi_device_ops  ops;
 309         struct acpi_driver      *driver;
 310         void                    *driver_data;
 311         struct kobject          kobj;
 312 };
 313
 314 #define acpi_driver_data(d)     ((d)->driver_data)
 315
 316
 317 /*
 318  * Events
 319  * ------
 320  */
 321
 322 struct acpi_bus_event {
 323         struct list_head        node;
 324         acpi_device_class       device_class;
 325         acpi_bus_id             bus_id;
 326         u32                     type;
 327         u32                     data;
 328 };
 329
 330 extern struct subsystem acpi_subsys;
 331
 332 /*
 333  * External Functions
 334  */
 335
 336 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 337 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 338 int acpi_bus_get_status (struct acpi_device *device);
 339 int acpi_bus_get_power (acpi_handle handle, int *state);
 340 int acpi_bus_set_power (acpi_handle handle, int state);
 341 int acpi_bus_generate_event (struct acpi_device *device, u8 type, int data);
 342 int acpi_bus_receive_event (struct acpi_bus_event *event);
 343 int acpi_bus_register_driver (struct acpi_driver *driver);
 344 int acpi_bus_unregister_driver (struct acpi_driver *driver);
 345 int acpi_bus_add (struct acpi_device **child, struct acpi_device *parent,
 346                 acpi_handle handle, int type);
 347 int acpi_bus_start (struct acpi_device *device);
 348
 349
 350 int acpi_match_ids (struct acpi_device  *device, char   *ids);
 351 int acpi_create_dir(struct acpi_device *);
 352 void acpi_remove_dir(struct acpi_device *);
 353
 354
 355 /*
 356  * Bind physical devices with ACPI devices
 357  */
 358 #include <linux/device.h>
 359 struct acpi_bus_type {
 360         struct list_head        list;
 361         struct bus_type         *bus;
 362         /* For general devices under the bus*/
 363         int (*find_device)(struct device *, acpi_handle*);
 364         /* For bridges, such as PCI root bridge, IDE controller */
 365         int (*find_bridge)(struct device *, acpi_handle *);
 366 };
 367 int register_acpi_bus_type(struct acpi_bus_type *);
 368 int unregister_acpi_bus_type(struct acpi_bus_type *);
 369 struct device *acpi_get_physical_device(acpi_handle);
 370 /* helper */
 371 acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 372 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 373 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->firmware_data))
 374
 375 #endif /*CONFIG_ACPI_BUS*/
 376
 377 #endif /*__ACPI_BUS_H__*/