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/device.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 /* acpi_utils.h */
  43 acpi_status
  44 acpi_extract_package(union acpi_object *package,
  45                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  46 acpi_status
  47 acpi_evaluate_integer(acpi_handle handle,
  48                       acpi_string pathname,
  49                       struct acpi_object_list *arguments, unsigned long long *data);
  50 acpi_status
  51 acpi_evaluate_reference(acpi_handle handle,
  52                         acpi_string pathname,
  53                         struct acpi_object_list *arguments,
  54                         struct acpi_handle_list *list);
  55
  56 #ifdef CONFIG_ACPI
  57
  58 #include <linux/proc_fs.h>
  59
  60 #define ACPI_BUS_FILE_ROOT      "acpi"
  61 extern struct proc_dir_entry *acpi_root_dir;
  62
  63 enum acpi_bus_removal_type {
  64         ACPI_BUS_REMOVAL_NORMAL = 0,
  65         ACPI_BUS_REMOVAL_EJECT,
  66         ACPI_BUS_REMOVAL_SUPRISE,
  67         ACPI_BUS_REMOVAL_TYPE_COUNT
  68 };
  69
  70 enum acpi_bus_device_type {
  71         ACPI_BUS_TYPE_DEVICE = 0,
  72         ACPI_BUS_TYPE_POWER,
  73         ACPI_BUS_TYPE_PROCESSOR,
  74         ACPI_BUS_TYPE_THERMAL,
  75         ACPI_BUS_TYPE_SYSTEM,
  76         ACPI_BUS_TYPE_POWER_BUTTON,
  77         ACPI_BUS_TYPE_SLEEP_BUTTON,
  78         ACPI_BUS_DEVICE_TYPE_COUNT
  79 };
  80
  81 struct acpi_driver;
  82 struct acpi_device;
  83
  84 /*
  85  * ACPI Driver
  86  * -----------
  87  */
  88
  89 typedef int (*acpi_op_add) (struct acpi_device * device);
  90 typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
  91 typedef int (*acpi_op_start) (struct acpi_device * device);
  92 typedef int (*acpi_op_stop) (struct acpi_device * device, int type);
  93 typedef int (*acpi_op_suspend) (struct acpi_device * device,
  94                                 pm_message_t state);
  95 typedef int (*acpi_op_resume) (struct acpi_device * device);
  96 typedef int (*acpi_op_bind) (struct acpi_device * device);
  97 typedef int (*acpi_op_unbind) (struct acpi_device * device);
  98 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  99
 100 struct acpi_bus_ops {
 101         u32 acpi_op_add:1;
 102         u32 acpi_op_start:1;
 103 };
 104
 105 struct acpi_device_ops {
 106         acpi_op_add add;
 107         acpi_op_remove remove;
 108         acpi_op_start start;
 109         acpi_op_stop stop;
 110         acpi_op_suspend suspend;
 111         acpi_op_resume resume;
 112         acpi_op_bind bind;
 113         acpi_op_unbind unbind;
 114         acpi_op_notify notify;
 115 };
 116
 117 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 118
 119 struct acpi_driver {
 120         char name[80];
 121         char class[80];
 122         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 123         unsigned int flags;
 124         struct acpi_device_ops ops;
 125         struct device_driver drv;
 126         struct module *owner;
 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 /* Flags */
 146
 147 struct acpi_device_flags {
 148         u32 dynamic_status:1;
 149         u32 hardware_id:1;
 150         u32 compatible_ids:1;
 151         u32 bus_address:1;
 152         u32 unique_id:1;
 153         u32 removable:1;
 154         u32 ejectable:1;
 155         u32 lockable:1;
 156         u32 suprise_removal_ok:1;
 157         u32 power_manageable:1;
 158         u32 performance_manageable:1;
 159         u32 wake_capable:1;     /* Wakeup(_PRW) supported? */
 160         u32 force_power_state:1;
 161         u32 reserved:19;
 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 /* Plug and Play */
 173
 174 typedef char acpi_bus_id[8];
 175 typedef unsigned long acpi_bus_address;
 176 typedef char acpi_hardware_id[15];
 177 typedef char acpi_unique_id[9];
 178 typedef char acpi_device_name[40];
 179 typedef char acpi_device_class[20];
 180
 181 struct acpi_device_pnp {
 182         acpi_bus_id bus_id;     /* Object name */
 183         acpi_bus_address bus_address;   /* _ADR */
 184         acpi_hardware_id hardware_id;   /* _HID */
 185         struct acpi_compatible_id_list *cid_list;       /* _CIDs */
 186         acpi_unique_id unique_id;       /* _UID */
 187         acpi_device_name device_name;   /* Driver-determined */
 188         acpi_device_class device_class; /*        "          */
 189 };
 190
 191 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 192 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 193 #define acpi_device_hid(d)      ((d)->pnp.hardware_id)
 194 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 195 #define acpi_device_name(d)     ((d)->pnp.device_name)
 196 #define acpi_device_class(d)    ((d)->pnp.device_class)
 197
 198 /* Power Management */
 199
 200 struct acpi_device_power_flags {
 201         u32 explicit_get:1;     /* _PSC present? */
 202         u32 power_resources:1;  /* Power resources */
 203         u32 inrush_current:1;   /* Serialize Dx->D0 */
 204         u32 power_removed:1;    /* Optimize Dx->D0 */
 205         u32 reserved:28;
 206 };
 207
 208 struct acpi_device_power_state {
 209         struct {
 210                 u8 valid:1;
 211                 u8 explicit_set:1;      /* _PSx present? */
 212                 u8 reserved:6;
 213         } flags;
 214         int power;              /* % Power (compared to D0) */
 215         int latency;            /* Dx->D0 time (microseconds) */
 216         struct acpi_handle_list resources;      /* Power resources referenced */
 217 };
 218
 219 struct acpi_device_power {
 220         int state;              /* Current state */
 221         struct acpi_device_power_flags flags;
 222         struct acpi_device_power_state states[4];       /* Power states (D0-D3) */
 223 };
 224
 225 /* Performance Management */
 226
 227 struct acpi_device_perf_flags {
 228         u8 reserved:8;
 229 };
 230
 231 struct acpi_device_perf_state {
 232         struct {
 233                 u8 valid:1;
 234                 u8 reserved:7;
 235         } flags;
 236         u8 power;               /* % Power (compared to P0) */
 237         u8 performance;         /* % Performance (    "   ) */
 238         int latency;            /* Px->P0 time (microseconds) */
 239 };
 240
 241 struct acpi_device_perf {
 242         int state;
 243         struct acpi_device_perf_flags flags;
 244         int state_count;
 245         struct acpi_device_perf_state *states;
 246 };
 247
 248 /* Wakeup Management */
 249 struct acpi_device_wakeup_flags {
 250         u8 valid:1;             /* Can successfully enable wakeup? */
 251         u8 prepared:1;          /* Has the wake-up capability been enabled? */
 252         u8 run_wake:1;          /* Run-Wake GPE devices */
 253 };
 254
 255 struct acpi_device_wakeup_state {
 256         u8 enabled:1;
 257 };
 258
 259 struct acpi_device_wakeup {
 260         acpi_handle gpe_device;
 261         acpi_integer gpe_number;
 262         acpi_integer sleep_state;
 263         struct acpi_handle_list resources;
 264         struct acpi_device_wakeup_state state;
 265         struct acpi_device_wakeup_flags flags;
 266 };
 267
 268 /* Device */
 269
 270 struct acpi_device {
 271         acpi_handle handle;
 272         struct acpi_device *parent;
 273         struct list_head children;
 274         struct list_head node;
 275         struct list_head wakeup_list;
 276         struct acpi_device_status status;
 277         struct acpi_device_flags flags;
 278         struct acpi_device_pnp pnp;
 279         struct acpi_device_power power;
 280         struct acpi_device_wakeup wakeup;
 281         struct acpi_device_perf performance;
 282         struct acpi_device_dir dir;
 283         struct acpi_device_ops ops;
 284         struct acpi_driver *driver;
 285         void *driver_data;
 286         struct device dev;
 287         struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 288         enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 289 };
 290
 291 static inline void *acpi_driver_data(struct acpi_device *d)
 292 {
 293         return d->driver_data;
 294 }
 295
 296 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 297 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 298
 299 /* acpi_device.dev.bus == &acpi_bus_type */
 300 extern struct bus_type acpi_bus_type;
 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 kobject *acpi_kobj;
 316 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 317 void acpi_bus_private_data_handler(acpi_handle, u32, void *);
 318 int acpi_bus_get_private_data(acpi_handle, void **);
 319 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 320 extern int register_acpi_notifier(struct notifier_block *);
 321 extern int unregister_acpi_notifier(struct notifier_block *);
 322
 323 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 324 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 325 /*
 326  * External Functions
 327  */
 328
 329 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 330 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 331 int acpi_bus_get_status(struct acpi_device *device);
 332 int acpi_bus_get_power(acpi_handle handle, int *state);
 333 int acpi_bus_set_power(acpi_handle handle, int state);
 334 bool acpi_bus_power_manageable(acpi_handle handle);
 335 bool acpi_bus_can_wakeup(acpi_handle handle);
 336 #ifdef CONFIG_ACPI_PROC_EVENT
 337 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 338 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 339 int acpi_bus_receive_event(struct acpi_bus_event *event);
 340 #else
 341 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 342         { return 0; }
 343 #endif
 344 int acpi_bus_register_driver(struct acpi_driver *driver);
 345 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 346 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 347                  acpi_handle handle, int type);
 348 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 349 int acpi_bus_start(struct acpi_device *device);
 350 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 351 int acpi_match_device_ids(struct acpi_device *device,
 352                           const struct acpi_device_id *ids);
 353 int acpi_create_dir(struct acpi_device *);
 354 void acpi_remove_dir(struct acpi_device *);
 355
 356 /*
 357  * Bind physical devices with ACPI devices
 358  */
 359 #include <linux/device.h>
 360 struct acpi_bus_type {
 361         struct list_head list;
 362         struct bus_type *bus;
 363         /* For general devices under the bus */
 364         int (*find_device) (struct device *, acpi_handle *);
 365         /* For bridges, such as PCI root bridge, IDE controller */
 366         int (*find_bridge) (struct device *, acpi_handle *);
 367 };
 368 int register_acpi_bus_type(struct acpi_bus_type *);
 369 int unregister_acpi_bus_type(struct acpi_bus_type *);
 370 struct device *acpi_get_physical_device(acpi_handle);
 371
 372 /* helper */
 373 acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 374 int acpi_is_root_bridge(acpi_handle);
 375 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 376 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 377
 378 #ifdef CONFIG_PM_SLEEP
 379 int acpi_pm_device_sleep_state(struct device *, int *);
 380 int acpi_pm_device_sleep_wake(struct device *, bool);
 381 #else /* !CONFIG_PM_SLEEP */
 382 static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 383 {
 384         if (p)
 385                 *p = ACPI_STATE_D0;
 386         return ACPI_STATE_D3;
 387 }
 388 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 389 {
 390         return -ENODEV;
 391 }
 392 #endif /* !CONFIG_PM_SLEEP */
 393
 394 #endif                          /* CONFIG_ACPI */
 395
 396 #endif /*__ACPI_BUS_H__*/