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 
54 #ifdef CONFIG_ACPI
55 
56 #include <linux/proc_fs.h>
57 
58 #define ACPI_BUS_FILE_ROOT	"acpi"
59 extern struct proc_dir_entry *acpi_root_dir;
60 
61 enum acpi_bus_removal_type {
62 	ACPI_BUS_REMOVAL_NORMAL = 0,
63 	ACPI_BUS_REMOVAL_EJECT,
64 	ACPI_BUS_REMOVAL_SUPRISE,
65 	ACPI_BUS_REMOVAL_TYPE_COUNT
66 };
67 
68 enum acpi_bus_device_type {
69 	ACPI_BUS_TYPE_DEVICE = 0,
70 	ACPI_BUS_TYPE_POWER,
71 	ACPI_BUS_TYPE_PROCESSOR,
72 	ACPI_BUS_TYPE_THERMAL,
73 	ACPI_BUS_TYPE_POWER_BUTTON,
74 	ACPI_BUS_TYPE_SLEEP_BUTTON,
75 	ACPI_BUS_DEVICE_TYPE_COUNT
76 };
77 
78 struct acpi_driver;
79 struct acpi_device;
80 
81 /*
82  * ACPI Driver
83  * -----------
84  */
85 
86 typedef int (*acpi_op_add) (struct acpi_device * device);
87 typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
88 typedef int (*acpi_op_start) (struct acpi_device * device);
89 typedef int (*acpi_op_suspend) (struct acpi_device * device,
90 				pm_message_t state);
91 typedef int (*acpi_op_resume) (struct acpi_device * device);
92 typedef int (*acpi_op_bind) (struct acpi_device * device);
93 typedef int (*acpi_op_unbind) (struct acpi_device * device);
94 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
95 
96 struct acpi_bus_ops {
97 	u32 acpi_op_add:1;
98 	u32 acpi_op_start:1;
99 };
100 
101 struct acpi_device_ops {
102 	acpi_op_add add;
103 	acpi_op_remove remove;
104 	acpi_op_start start;
105 	acpi_op_suspend suspend;
106 	acpi_op_resume resume;
107 	acpi_op_bind bind;
108 	acpi_op_unbind unbind;
109 	acpi_op_notify notify;
110 };
111 
112 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS	0x1	/* system AND device events */
113 
114 struct acpi_driver {
115 	char name[80];
116 	char class[80];
117 	const struct acpi_device_id *ids; /* Supported Hardware IDs */
118 	unsigned int flags;
119 	struct acpi_device_ops ops;
120 	struct device_driver drv;
121 	struct module *owner;
122 };
123 
124 /*
125  * ACPI Device
126  * -----------
127  */
128 
129 /* Status (_STA) */
130 
131 struct acpi_device_status {
132 	u32 present:1;
133 	u32 enabled:1;
134 	u32 show_in_ui:1;
135 	u32 functional:1;
136 	u32 battery_present:1;
137 	u32 reserved:27;
138 };
139 
140 /* Flags */
141 
142 struct acpi_device_flags {
143 	u32 dynamic_status:1;
144 	u32 bus_address:1;
145 	u32 removable:1;
146 	u32 ejectable:1;
147 	u32 lockable:1;
148 	u32 suprise_removal_ok:1;
149 	u32 power_manageable:1;
150 	u32 performance_manageable:1;
151 	u32 reserved:24;
152 };
153 
154 /* File System */
155 
156 struct acpi_device_dir {
157 	struct proc_dir_entry *entry;
158 };
159 
160 #define acpi_device_dir(d)	((d)->dir.entry)
161 
162 /* Plug and Play */
163 
164 typedef char acpi_bus_id[8];
165 typedef unsigned long acpi_bus_address;
166 typedef char acpi_device_name[40];
167 typedef char acpi_device_class[20];
168 
169 struct acpi_hardware_id {
170 	struct list_head list;
171 	char *id;
172 };
173 
174 struct acpi_device_pnp {
175 	acpi_bus_id bus_id;	/* Object name */
176 	acpi_bus_address bus_address;	/* _ADR */
177 	char *unique_id;	/* _UID */
178 	struct list_head ids;		/* _HID and _CIDs */
179 	acpi_device_name device_name;	/* Driver-determined */
180 	acpi_device_class device_class;	/*        "          */
181 };
182 
183 #define acpi_device_bid(d)	((d)->pnp.bus_id)
184 #define acpi_device_adr(d)	((d)->pnp.bus_address)
185 const char *acpi_device_hid(struct acpi_device *device);
186 #define acpi_device_name(d)	((d)->pnp.device_name)
187 #define acpi_device_class(d)	((d)->pnp.device_class)
188 
189 /* Power Management */
190 
191 struct acpi_device_power_flags {
192 	u32 explicit_get:1;	/* _PSC present? */
193 	u32 power_resources:1;	/* Power resources */
194 	u32 inrush_current:1;	/* Serialize Dx->D0 */
195 	u32 power_removed:1;	/* Optimize Dx->D0 */
196 	u32 reserved:28;
197 };
198 
199 struct acpi_device_power_state {
200 	struct {
201 		u8 valid:1;
202 		u8 explicit_set:1;	/* _PSx present? */
203 		u8 reserved:6;
204 	} flags;
205 	int power;		/* % Power (compared to D0) */
206 	int latency;		/* Dx->D0 time (microseconds) */
207 	struct acpi_handle_list resources;	/* Power resources referenced */
208 };
209 
210 struct acpi_device_power {
211 	int state;		/* Current state */
212 	struct acpi_device_power_flags flags;
213 	struct acpi_device_power_state states[ACPI_D_STATE_COUNT];	/* Power states (D0-D3Cold) */
214 };
215 
216 /* Performance Management */
217 
218 struct acpi_device_perf_flags {
219 	u8 reserved:8;
220 };
221 
222 struct acpi_device_perf_state {
223 	struct {
224 		u8 valid:1;
225 		u8 reserved:7;
226 	} flags;
227 	u8 power;		/* % Power (compared to P0) */
228 	u8 performance;		/* % Performance (    "   ) */
229 	int latency;		/* Px->P0 time (microseconds) */
230 };
231 
232 struct acpi_device_perf {
233 	int state;
234 	struct acpi_device_perf_flags flags;
235 	int state_count;
236 	struct acpi_device_perf_state *states;
237 };
238 
239 /* Wakeup Management */
240 struct acpi_device_wakeup_flags {
241 	u8 valid:1;		/* Can successfully enable wakeup? */
242 	u8 run_wake:1;		/* Run-Wake GPE devices */
243 	u8 notifier_present:1;  /* Wake-up notify handler has been installed */
244 };
245 
246 struct acpi_device_wakeup {
247 	acpi_handle gpe_device;
248 	u64 gpe_number;
249 	u64 sleep_state;
250 	struct acpi_handle_list resources;
251 	struct acpi_device_wakeup_flags flags;
252 	int prepare_count;
253 };
254 
255 /* Device */
256 
257 struct acpi_device {
258 	int device_type;
259 	acpi_handle handle;		/* no handle for fixed hardware */
260 	struct acpi_device *parent;
261 	struct list_head children;
262 	struct list_head node;
263 	struct list_head wakeup_list;
264 	struct acpi_device_status status;
265 	struct acpi_device_flags flags;
266 	struct acpi_device_pnp pnp;
267 	struct acpi_device_power power;
268 	struct acpi_device_wakeup wakeup;
269 	struct acpi_device_perf performance;
270 	struct acpi_device_dir dir;
271 	struct acpi_device_ops ops;
272 	struct acpi_driver *driver;
273 	void *driver_data;
274 	struct device dev;
275 	struct acpi_bus_ops bus_ops;	/* workaround for different code path for hotplug */
276 	enum acpi_bus_removal_type removal_type;	/* indicate for different removal type */
277 };
278 
acpi_driver_data(struct acpi_device * d)279 static inline void *acpi_driver_data(struct acpi_device *d)
280 {
281 	return d->driver_data;
282 }
283 
284 #define to_acpi_device(d)	container_of(d, struct acpi_device, dev)
285 #define to_acpi_driver(d)	container_of(d, struct acpi_driver, drv)
286 
287 /* acpi_device.dev.bus == &acpi_bus_type */
288 extern struct bus_type acpi_bus_type;
289 
290 /*
291  * Events
292  * ------
293  */
294 
295 struct acpi_bus_event {
296 	struct list_head node;
297 	acpi_device_class device_class;
298 	acpi_bus_id bus_id;
299 	u32 type;
300 	u32 data;
301 };
302 
303 extern struct kobject *acpi_kobj;
304 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
305 void acpi_bus_private_data_handler(acpi_handle, void *);
306 int acpi_bus_get_private_data(acpi_handle, void **);
307 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
308 extern int register_acpi_notifier(struct notifier_block *);
309 extern int unregister_acpi_notifier(struct notifier_block *);
310 
311 extern int register_acpi_bus_notifier(struct notifier_block *nb);
312 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
313 /*
314  * External Functions
315  */
316 
317 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
318 void acpi_bus_data_handler(acpi_handle handle, void *context);
319 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
320 				       unsigned long long *sta);
321 int acpi_bus_get_status(struct acpi_device *device);
322 int acpi_bus_set_power(acpi_handle handle, int state);
323 int acpi_bus_update_power(acpi_handle handle, int *state_p);
324 bool acpi_bus_power_manageable(acpi_handle handle);
325 bool acpi_bus_can_wakeup(acpi_handle handle);
326 int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
327 void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
328 #ifdef CONFIG_ACPI_PROC_EVENT
329 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
330 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
331 int acpi_bus_receive_event(struct acpi_bus_event *event);
332 #else
acpi_bus_generate_proc_event(struct acpi_device * device,u8 type,int data)333 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
334 	{ return 0; }
335 #endif
336 int acpi_bus_register_driver(struct acpi_driver *driver);
337 void acpi_bus_unregister_driver(struct acpi_driver *driver);
338 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
339 		 acpi_handle handle, int type);
340 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
341 int acpi_bus_start(struct acpi_device *device);
342 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
343 int acpi_match_device_ids(struct acpi_device *device,
344 			  const struct acpi_device_id *ids);
345 int acpi_create_dir(struct acpi_device *);
346 void acpi_remove_dir(struct acpi_device *);
347 
348 /*
349  * Bind physical devices with ACPI devices
350  */
351 struct acpi_bus_type {
352 	struct list_head list;
353 	struct bus_type *bus;
354 	/* For general devices under the bus */
355 	int (*find_device) (struct device *, acpi_handle *);
356 	/* For bridges, such as PCI root bridge, IDE controller */
357 	int (*find_bridge) (struct device *, acpi_handle *);
358 };
359 int register_acpi_bus_type(struct acpi_bus_type *);
360 int unregister_acpi_bus_type(struct acpi_bus_type *);
361 struct device *acpi_get_physical_device(acpi_handle);
362 
363 struct acpi_pci_root {
364 	struct list_head node;
365 	struct acpi_device * device;
366 	struct acpi_pci_id id;
367 	struct pci_bus *bus;
368 	u16 segment;
369 	struct resource secondary;	/* downstream bus range */
370 
371 	u32 osc_support_set;	/* _OSC state of support bits */
372 	u32 osc_control_set;	/* _OSC state of control bits */
373 };
374 
375 /* helper */
376 acpi_handle acpi_get_child(acpi_handle, u64);
377 int acpi_is_root_bridge(acpi_handle);
378 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
379 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
380 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
381 
382 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
383 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
384 
385 #ifdef CONFIG_PM
386 int acpi_pm_device_sleep_state(struct device *, int *);
387 #else
acpi_pm_device_sleep_state(struct device * d,int * p)388 static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
389 {
390 	if (p)
391 		*p = ACPI_STATE_D0;
392 	return ACPI_STATE_D3;
393 }
394 #endif
395 
396 #ifdef CONFIG_PM_SLEEP
397 int acpi_pm_device_run_wake(struct device *, bool);
398 int acpi_pm_device_sleep_wake(struct device *, bool);
399 #else
acpi_pm_device_run_wake(struct device * dev,bool enable)400 static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
401 {
402 	return -ENODEV;
403 }
acpi_pm_device_sleep_wake(struct device * dev,bool enable)404 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
405 {
406 	return -ENODEV;
407 }
408 #endif
409 
410 #endif				/* CONFIG_ACPI */
411 
412 #endif /*__ACPI_BUS_H__*/
413