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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/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_device_ops {
 112         acpi_op_add             add;
 113         acpi_op_remove          remove;
 114         acpi_op_lock            lock;
 115         acpi_op_start           start;
 116         acpi_op_stop            stop;
 117         acpi_op_suspend         suspend;
 118         acpi_op_resume          resume;
 119         acpi_op_scan            scan;
 120         acpi_op_bind            bind;
 121         acpi_op_unbind          unbind;
 122         acpi_op_match           match;
 123 };
 124
 125 struct acpi_driver {
 126         struct list_head        node;
 127         char                    name[80];
 128         char                    class[80];
 129         atomic_t                references;
 130         char                    *ids;           /* Supported Hardware IDs */
 131         struct acpi_device_ops  ops;
 132 };
 133
 134 /*
 135  * ACPI Device
 136  * -----------
 137  */
 138
 139 /* Status (_STA) */
 140
 141 struct acpi_device_status {
 142         u32                     present:1;
 143         u32                     enabled:1;
 144         u32                     show_in_ui:1;
 145         u32                     functional:1;
 146         u32                     battery_present:1;
 147         u32                     reserved:27;
 148 };
 149
 150
 151 /* Flags */
 152
 153 struct acpi_device_flags {
 154         u32                     dynamic_status:1;
 155         u32                     hardware_id:1;
 156         u32                     compatible_ids:1;
 157         u32                     bus_address:1;
 158         u32                     unique_id:1;
 159         u32                     removable:1;
 160         u32                     ejectable:1;
 161         u32                     lockable:1;
 162         u32                     suprise_removal_ok:1;
 163         u32                     power_manageable:1;
 164         u32                     performance_manageable:1;
 165         u32                     wake_capable:1; /* Wakeup(_PRW) supported? */
 166         u32                     reserved:20;
 167 };
 168
 169
 170 /* File System */
 171
 172 struct acpi_device_dir {
 173         struct proc_dir_entry   *entry;
 174 };
 175
 176 #define acpi_device_dir(d)      ((d)->dir.entry)
 177
 178
 179 /* Plug and Play */
 180
 181 typedef char                    acpi_bus_id[5];
 182 typedef unsigned long           acpi_bus_address;
 183 typedef char                    acpi_hardware_id[9];
 184 typedef char                    acpi_unique_id[9];
 185 typedef char                    acpi_device_name[40];
 186 typedef char                    acpi_device_class[20];
 187
 188 struct acpi_device_pnp {
 189         acpi_bus_id             bus_id;                        /* Object name */
 190         acpi_bus_address        bus_address;                          /* _ADR */
 191         acpi_hardware_id        hardware_id;                          /* _HID */
 192         struct acpi_compatible_id_list *cid_list;                    /* _CIDs */
 193         acpi_unique_id          unique_id;                            /* _UID */
 194         acpi_device_name        device_name;             /* Driver-determined */
 195         acpi_device_class       device_class;            /*        "          */
 196 };
 197
 198 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 199 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 200 #define acpi_device_hid(d)      ((d)->pnp.hardware_id)
 201 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 202 #define acpi_device_name(d)     ((d)->pnp.device_name)
 203 #define acpi_device_class(d)    ((d)->pnp.device_class)
 204
 205
 206 /* Power Management */
 207
 208 struct acpi_device_power_flags {
 209         u32                     explicit_get:1;              /* _PSC present? */
 210         u32                     power_resources:1;         /* Power resources */
 211         u32                     inrush_current:1;         /* Serialize Dx->D0 */
 212         u32                     power_removed:1;           /* Optimize Dx->D0 */
 213         u32                     reserved:28;
 214 };
 215
 216 struct acpi_device_power_state {
 217         struct {
 218                 u8                      valid:1;
 219                 u8                      explicit_set:1;      /* _PSx present? */
 220                 u8                      reserved:6;
 221         }                       flags;
 222         int                     power;            /* % Power (compared to D0) */
 223         int                     latency;        /* Dx->D0 time (microseconds) */
 224         struct acpi_handle_list resources;      /* Power resources referenced */
 225 };
 226
 227 struct acpi_device_power {
 228         int                     state;                       /* Current state */
 229         struct acpi_device_power_flags flags;
 230         struct acpi_device_power_state states[4];     /* Power states (D0-D3) */
 231 };
 232
 233
 234 /* Performance Management */
 235
 236 struct acpi_device_perf_flags {
 237         u8                      reserved:8;
 238 };
 239
 240 struct acpi_device_perf_state {
 241         struct {
 242                 u8                      valid:1;
 243                 u8                      reserved:7;
 244         }                       flags;
 245         u8                      power;            /* % Power (compared to P0) */
 246         u8                      performance;      /* % Performance (    "   ) */
 247         int                     latency;        /* Px->P0 time (microseconds) */
 248 };
 249
 250 struct acpi_device_perf {
 251         int                     state;
 252         struct acpi_device_perf_flags flags;
 253         int                     state_count;
 254         struct acpi_device_perf_state *states;
 255 };
 256
 257 /* Wakeup Management */
 258 struct acpi_device_wakeup_flags {
 259         u8      valid:1; /* Can successfully enable wakeup? */
 260         u8      run_wake:1; /* Run-Wake GPE devices */
 261 };
 262
 263 struct acpi_device_wakeup_state {
 264         u8      enabled:1;
 265         u8      active:1;
 266 };
 267
 268 struct acpi_device_wakeup {
 269         acpi_handle             gpe_device;
 270         acpi_integer            gpe_number;;
 271         acpi_integer            sleep_state;
 272         struct acpi_handle_list resources;
 273         struct acpi_device_wakeup_state state;
 274         struct acpi_device_wakeup_flags flags;
 275 };
 276
 277 /* Device */
 278
 279 struct acpi_device {
 280         acpi_handle             handle;
 281         struct acpi_device      *parent;
 282         struct list_head        children;
 283         struct list_head        node;
 284         struct list_head        wakeup_list;
 285         struct list_head        g_list;
 286         struct acpi_device_status status;
 287         struct acpi_device_flags flags;
 288         struct acpi_device_pnp  pnp;
 289         struct acpi_device_power power;
 290         struct acpi_device_wakeup wakeup;
 291         struct acpi_device_perf performance;
 292         struct acpi_device_dir  dir;
 293         struct acpi_device_ops  ops;
 294         struct acpi_driver      *driver;
 295         void                    *driver_data;
 296         struct kobject          kobj;
 297 };
 298
 299 #define acpi_driver_data(d)     ((d)->driver_data)
 300
 301
 302 /*
 303  * Events
 304  * ------
 305  */
 306
 307 struct acpi_bus_event {
 308         struct list_head        node;
 309         acpi_device_class       device_class;
 310         acpi_bus_id             bus_id;
 311         u32                     type;
 312         u32                     data;
 313 };
 314
 315 extern struct subsystem acpi_subsys;
 316
 317 /*
 318  * External Functions
 319  */
 320
 321 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 322 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 323 int acpi_bus_get_status (struct acpi_device *device);
 324 int acpi_bus_get_power (acpi_handle handle, int *state);
 325 int acpi_bus_set_power (acpi_handle handle, int state);
 326 int acpi_bus_generate_event (struct acpi_device *device, u8 type, int data);
 327 int acpi_bus_receive_event (struct acpi_bus_event *event);
 328 int acpi_bus_register_driver (struct acpi_driver *driver);
 329 int acpi_bus_unregister_driver (struct acpi_driver *driver);
 330 int acpi_bus_scan (struct acpi_device *start);
 331 int acpi_bus_add (struct acpi_device **child, struct acpi_device *parent,
 332                 acpi_handle handle, int type);
 333
 334
 335 int acpi_match_ids (struct acpi_device  *device, char   *ids);
 336 int acpi_create_dir(struct acpi_device *);
 337 void acpi_remove_dir(struct acpi_device *);
 338
 339 #endif /*CONFIG_ACPI_BUS*/
 340
 341 #endif /*__ACPI_BUS_H__*/