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Duy Truong790f06d2013-02-13 16:38:12 -08001/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -07002 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 */
13
14#ifndef __SUBSYS_RESTART_H
15#define __SUBSYS_RESTART_H
16
17#include <linux/spinlock.h>
18
19#define SUBSYS_NAME_MAX_LENGTH 40
20
Stephen Boyd0ebf7212012-04-30 20:42:35 -070021struct subsys_device;
22
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070023enum {
Stephen Boydfcb52a32012-12-03 12:35:14 -080024 RESET_SOC = 0,
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070025 RESET_SUBSYS_COUPLED,
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070026 RESET_LEVEL_MAX
27};
28
Stephen Boyd4ec9a942012-06-21 19:10:48 -070029struct device;
30struct module;
31
32/**
33 * struct subsys_desc - subsystem descriptor
34 * @name: name of subsystem
35 * @depends_on: subsystem this subsystem depends on to operate
36 * @dev: parent device
37 * @owner: module the descriptor belongs to
Stephen Boyd2e5c80d2012-06-25 19:33:43 -070038 * @start: Start a subsystem
39 * @stop: Stop a subsystem
40 * @shutdown: Stop a subsystem
41 * @powerup: Start a subsystem
42 * @crash_shutdown: Shutdown a subsystem when the system crashes (can't sleep)
43 * @ramdump: Collect a ramdump of the subsystem
Stephen Boyd4ec9a942012-06-21 19:10:48 -070044 */
Stephen Boyd0ebf7212012-04-30 20:42:35 -070045struct subsys_desc {
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070046 const char *name;
Stephen Boyd4ec9a942012-06-21 19:10:48 -070047 const char *depends_on;
48 struct device *dev;
49 struct module *owner;
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070050
Stephen Boyd2e5c80d2012-06-25 19:33:43 -070051 int (*start)(const struct subsys_desc *desc);
52 void (*stop)(const struct subsys_desc *desc);
53
Stephen Boyd0ebf7212012-04-30 20:42:35 -070054 int (*shutdown)(const struct subsys_desc *desc);
55 int (*powerup)(const struct subsys_desc *desc);
56 void (*crash_shutdown)(const struct subsys_desc *desc);
57 int (*ramdump)(int, const struct subsys_desc *desc);
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070058};
59
60#if defined(CONFIG_MSM_SUBSYSTEM_RESTART)
61
Stephen Boydfcb52a32012-12-03 12:35:14 -080062extern int subsys_get_restart_level(struct subsys_device *dev);
Stephen Boyd0ebf7212012-04-30 20:42:35 -070063extern int subsystem_restart_dev(struct subsys_device *dev);
64extern int subsystem_restart(const char *name);
Stephen Boyd4057ec02012-12-12 17:38:38 -080065extern int subsystem_crashed(const char *name);
Stephen Boyd0ebf7212012-04-30 20:42:35 -070066
Stephen Boyd2e5c80d2012-06-25 19:33:43 -070067extern void *subsystem_get(const char *name);
68extern void subsystem_put(void *subsystem);
69
Stephen Boyd0ebf7212012-04-30 20:42:35 -070070extern struct subsys_device *subsys_register(struct subsys_desc *desc);
71extern void subsys_unregister(struct subsys_device *dev);
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070072
Stephen Boyd43b380a2012-09-21 17:34:24 -070073extern void subsys_default_online(struct subsys_device *dev);
74
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070075#else
76
Stephen Boydfcb52a32012-12-03 12:35:14 -080077static inline int subsys_get_restart_level(struct subsys_device *dev)
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070078{
79 return 0;
80}
81
Stephen Boyd0ebf7212012-04-30 20:42:35 -070082static inline int subsystem_restart_dev(struct subsys_device *dev)
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070083{
84 return 0;
85}
86
Stephen Boyd0ebf7212012-04-30 20:42:35 -070087static inline int subsystem_restart(const char *name)
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -070088{
89 return 0;
90}
91
Stephen Boyd4057ec02012-12-12 17:38:38 -080092static inline int subsystem_crashed(const char *name)
93{
94 return 0;
95}
96
Stephen Boyd2e5c80d2012-06-25 19:33:43 -070097static inline void *subsystem_get(const char *name)
98{
99 return NULL;
100}
101
102static inline void subsystem_put(void *subsystem) { }
103
Stephen Boyd0ebf7212012-04-30 20:42:35 -0700104static inline
105struct subsys_device *subsys_register(struct subsys_desc *desc)
106{
107 return NULL;
108}
109
110static inline void subsys_unregister(struct subsys_device *dev) { }
111
Stephen Boyd43b380a2012-09-21 17:34:24 -0700112static inline void subsys_default_online(struct subsys_device *dev) { }
113
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -0700114#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
115
116#endif