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
 108 struct acpi_device_ops {
 109         acpi_op_add             add;
 110         acpi_op_remove          remove;
 111         acpi_op_lock            lock;
 112         acpi_op_start           start;
 113         acpi_op_stop            stop;
 114         acpi_op_suspend         suspend;
 115         acpi_op_resume          resume;
 116         acpi_op_scan            scan;
 117         acpi_op_bind            bind;
 118 };
 119
 120 struct acpi_driver {
 121         struct list_head        node;
 122         char                    name[80];
 123         char                    class[80];
 124         atomic_t                references;
 125         char                    *ids;           /* Supported Hardware IDs */
 126         struct acpi_device_ops  ops;
 127 };
 128
 129 /*
 130  * ACPI Device
 131  * -----------
 132  */
 133
 134 /* Status (_STA) */
 135
 136 struct acpi_device_status {
 137         u32                     present:1;
 138         u32                     enabled:1;
 139         u32                     show_in_ui:1;
 140         u32                     functional:1;
 141         u32                     battery_present:1;
 142         u32                     reserved:27;
 143 };
 144
 145
 146 /* Flags */
 147
 148 struct acpi_device_flags {
 149         u32                     dynamic_status:1;
 150         u32                     hardware_id:1;
 151         u32                     compatible_ids:1;
 152         u32                     bus_address:1;
 153         u32                     unique_id:1;
 154         u32                     removable:1;
 155         u32                     ejectable:1;
 156         u32                     lockable:1;
 157         u32                     suprise_removal_ok:1;
 158         u32                     power_manageable:1;
 159         u32                     performance_manageable:1;
 160         u32                     reserved:21;
 161 };
 162
 163
 164 /* File System */
 165
 166 struct acpi_device_dir {
 167         struct proc_dir_entry   *entry;
 168 };
 169
 170 #define acpi_device_dir(d)      ((d)->dir.entry)
 171
 172
 173 /* Plug and Play */
 174
 175 typedef char                    acpi_bus_id[5];
 176 typedef unsigned long           acpi_bus_address;
 177 typedef char                    acpi_hardware_id[9];
 178 typedef char                    acpi_unique_id[9];
 179 typedef char                    acpi_device_name[40];
 180 typedef char                    acpi_device_class[20];
 181
 182 struct acpi_device_pnp {
 183         acpi_bus_id             bus_id;                        /* Object name */
 184         acpi_bus_address        bus_address;                          /* _ADR */
 185         acpi_hardware_id        hardware_id;                          /* _HID */
 186         struct acpi_compatible_id_list *cid_list;                    /* _CIDs */
 187         acpi_unique_id          unique_id;                            /* _UID */
 188         acpi_device_name        device_name;             /* Driver-determined */
 189         acpi_device_class       device_class;            /*        "          */
 190 };
 191
 192 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 193 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 194 #define acpi_device_hid(d)      ((d)->pnp.hardware_id)
 195 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 196 #define acpi_device_name(d)     ((d)->pnp.device_name)
 197 #define acpi_device_class(d)    ((d)->pnp.device_class)
 198
 199
 200 /* Power Management */
 201
 202 struct acpi_device_power_flags {
 203         u32                     explicit_get:1;              /* _PSC present? */
 204         u32                     power_resources:1;         /* Power resources */
 205         u32                     inrush_current:1;         /* Serialize Dx->D0 */
 206         u32                     wake_capable:1;          /* Wakeup supported? */
 207         u32                     wake_enabled:1;         /* Enabled for wakeup */
 208         u32                     power_removed:1;           /* Optimize Dx->D0 */
 209         u32                     reserved:26;
 210 };
 211
 212 struct acpi_device_power_state {
 213         struct {
 214                 u8                      valid:1;
 215                 u8                      explicit_set:1;      /* _PSx present? */
 216                 u8                      reserved:6;
 217         }                       flags;
 218         int                     power;            /* % Power (compared to D0) */
 219         int                     latency;        /* Dx->D0 time (microseconds) */
 220         struct acpi_handle_list resources;      /* Power resources referenced */
 221 };
 222
 223 struct acpi_device_power {
 224         int                     state;                       /* Current state */
 225         struct acpi_device_power_flags flags;
 226         struct acpi_device_power_state states[4];     /* Power states (D0-D3) */
 227 };
 228
 229
 230 /* Performance Management */
 231
 232 struct acpi_device_perf_flags {
 233         u8                      reserved:8;
 234 };
 235
 236 struct acpi_device_perf_state {
 237         struct {
 238                 u8                      valid:1;
 239                 u8                      reserved:7;
 240         }                       flags;
 241         u8                      power;            /* % Power (compared to P0) */
 242         u8                      performance;      /* % Performance (    "   ) */
 243         int                     latency;        /* Px->P0 time (microseconds) */
 244 };
 245
 246 struct acpi_device_perf {
 247         int                     state;
 248         struct acpi_device_perf_flags flags;
 249         int                     state_count;
 250         struct acpi_device_perf_state *states;
 251 };
 252
 253
 254 /* Device */
 255
 256 struct acpi_device {
 257         acpi_handle             handle;
 258         struct acpi_device      *parent;
 259         struct list_head        children;
 260         struct list_head        node;
 261         struct list_head        g_list;
 262         struct acpi_device_status status;
 263         struct acpi_device_flags flags;
 264         struct acpi_device_pnp  pnp;
 265         struct acpi_device_power power;
 266         struct acpi_device_perf performance;
 267         struct acpi_device_dir  dir;
 268         struct acpi_device_ops  ops;
 269         struct acpi_driver      *driver;
 270         void                    *driver_data;
 271         struct kobject          kobj;
 272 };
 273
 274 #define acpi_driver_data(d)     ((d)->driver_data)
 275
 276
 277 /*
 278  * Events
 279  * ------
 280  */
 281
 282 struct acpi_bus_event {
 283         struct list_head        node;
 284         acpi_device_class       device_class;
 285         acpi_bus_id             bus_id;
 286         u32                     type;
 287         u32                     data;
 288 };
 289
 290 extern struct subsystem acpi_subsys;
 291
 292 /*
 293  * External Functions
 294  */
 295
 296 int acpi_bus_get_device(acpi_handle, struct acpi_device **device);
 297 int acpi_bus_get_status (struct acpi_device *device);
 298 int acpi_bus_get_power (acpi_handle handle, int *state);
 299 int acpi_bus_set_power (acpi_handle handle, int state);
 300 int acpi_bus_generate_event (struct acpi_device *device, u8 type, int data);
 301 int acpi_bus_receive_event (struct acpi_bus_event *event);
 302 int acpi_bus_register_driver (struct acpi_driver *driver);
 303 int acpi_bus_unregister_driver (struct acpi_driver *driver);
 304
 305 int acpi_create_dir(struct acpi_device *);
 306 void acpi_remove_dir(struct acpi_device *);
 307
 308 #endif /*CONFIG_ACPI_BUS*/
 309
 310 #endif /*__ACPI_BUS_H__*/