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 /* TBD: Make dynamic */
  34 #define ACPI_MAX_HANDLES        10
  35 struct acpi_handle_list {
  36         u32 count;
  37         acpi_handle handles[ACPI_MAX_HANDLES];
  38 };
  39
  40 /* acpi_utils.h */
  41 acpi_status
  42 acpi_extract_package(union acpi_object *package,
  43                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  44 acpi_status
  45 acpi_evaluate_integer(acpi_handle handle,
  46                       acpi_string pathname,
  47                       struct acpi_object_list *arguments, unsigned long long *data);
  48 acpi_status
  49 acpi_evaluate_reference(acpi_handle handle,
  50                         acpi_string pathname,
  51                         struct acpi_object_list *arguments,
  52                         struct acpi_handle_list *list);
  53 acpi_status
  54 acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
  55                         u32 status_code, struct acpi_buffer *status_buf);
  56
  57 struct 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
  86 acpi_status
  87 acpi_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"
  93 extern struct proc_dir_entry *acpi_root_dir;
  94
  95 enum 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
 102 enum 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
 112 struct acpi_driver;
 113 struct acpi_device;
 114
 115 /*
 116  * ACPI Driver
 117  * -----------
 118  */
 119
 120 typedef int (*acpi_op_add) (struct acpi_device * device);
 121 typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
 122 typedef int (*acpi_op_start) (struct acpi_device * device);
 123 typedef int (*acpi_op_bind) (struct acpi_device * device);
 124 typedef int (*acpi_op_unbind) (struct acpi_device * device);
 125 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 126
 127 struct acpi_bus_ops {
 128         u32 acpi_op_add:1;
 129         u32 acpi_op_start:1;
 130 };
 131
 132 struct 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
 143 struct 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
 160 struct 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
 171 struct 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
 186 struct 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
 194 typedef char acpi_bus_id[8];
 195 typedef unsigned long acpi_bus_address;
 196 typedef char acpi_device_name[40];
 197 typedef char acpi_device_class[20];
 198
 199 struct acpi_hardware_id {
 200         struct list_head list;
 201         char *id;
 202 };
 203
 204 struct 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)
 215 const 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
 221 struct 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
 229 struct 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
 240 struct 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
 248 struct acpi_device_perf_flags {
 249         u8 reserved:8;
 250 };
 251
 252 struct 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
 262 struct 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 */
 270 struct 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
 276 struct 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
 287 struct 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
 309 static 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 */
 318 extern struct bus_type acpi_bus_type;
 319
 320 /*
 321  * Events
 322  * ------
 323  */
 324
 325 struct 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
 333 struct acpi_eject_event {
 334         acpi_handle     handle;
 335         u32             event;
 336 };
 337
 338 extern struct kobject *acpi_kobj;
 339 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 340 void acpi_bus_private_data_handler(acpi_handle, void *);
 341 int acpi_bus_get_private_data(acpi_handle, void **);
 342 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 343 extern int register_acpi_notifier(struct notifier_block *);
 344 extern int unregister_acpi_notifier(struct notifier_block *);
 345
 346 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 347 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 348 /*
 349  * External Functions
 350  */
 351
 352 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 353 void acpi_bus_data_handler(acpi_handle handle, void *context);
 354 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 355                                        unsigned long long *sta);
 356 int acpi_bus_get_status(struct acpi_device *device);
 357 int acpi_bus_set_power(acpi_handle handle, int state);
 358 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 359 bool acpi_bus_power_manageable(acpi_handle handle);
 360 bool acpi_bus_can_wakeup(acpi_handle handle);
 361 int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
 362 void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
 363 #ifdef CONFIG_ACPI_PROC_EVENT
 364 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 365 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 366 int acpi_bus_receive_event(struct acpi_bus_event *event);
 367 #else
 368 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 369         { return 0; }
 370 #endif
 371 int acpi_bus_register_driver(struct acpi_driver *driver);
 372 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 373 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 374                  acpi_handle handle, int type);
 375 void acpi_bus_hot_remove_device(void *context);
 376 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 377 int acpi_bus_start(struct acpi_device *device);
 378 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 379 int acpi_match_device_ids(struct acpi_device *device,
 380                           const struct acpi_device_id *ids);
 381 int acpi_create_dir(struct acpi_device *);
 382 void acpi_remove_dir(struct acpi_device *);
 383
 384 /*
 385  * Bind physical devices with ACPI devices
 386  */
 387 struct 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 };
 395 int register_acpi_bus_type(struct acpi_bus_type *);
 396 int unregister_acpi_bus_type(struct acpi_bus_type *);
 397 struct device *acpi_get_physical_device(acpi_handle);
 398
 399 struct 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 */
 413 acpi_handle acpi_get_child(acpi_handle, u64);
 414 int acpi_is_root_bridge(acpi_handle);
 415 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 416 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 417 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 418
 419 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 420 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 421
 422 #ifdef CONFIG_PM
 423 int acpi_pm_device_sleep_state(struct device *, int *, int);
 424 #else
 425 static 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
 434 int acpi_pm_device_run_wake(struct device *, bool);
 435 int acpi_pm_device_sleep_wake(struct device *, bool);
 436 #else
 437 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
 438 {
 439         return -ENODEV;
 440 }
 441 static 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
 449 static inline int register_acpi_bus_type(void *bus) { return 0; }
 450 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 451
 452 #endif                          /* CONFIG_ACPI */
 453
 454 #endif /*__ACPI_BUS_H__*/