include/linux/enclosure.h

   1 /*
   2  * Enclosure Services
   3  *
   4  * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
   5  *
   6 **-----------------------------------------------------------------------------
   7 **
   8 **  This program is free software; you can redistribute it and/or
   9 **  modify it under the terms of the GNU General Public License
  10 **  version 2 as published by the Free Software Foundation.
  11 **
  12 **  This program is distributed in the hope that it will be useful,
  13 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 **  GNU General Public License for more details.
  16 **
  17 **  You should have received a copy of the GNU General Public License
  18 **  along with this program; if not, write to the Free Software
  19 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 **
  21 **-----------------------------------------------------------------------------
  22 */
  23 #ifndef _LINUX_ENCLOSURE_H_
  24 #define _LINUX_ENCLOSURE_H_
  25
  26 #include <linux/device.h>
  27 #include <linux/list.h>
  28
  29 /* A few generic types ... taken from ses-2 */
  30 enum enclosure_component_type {
  31         ENCLOSURE_COMPONENT_DEVICE = 0x01,
  32         ENCLOSURE_COMPONENT_ARRAY_DEVICE = 0x17,
  33 };
  34
  35 /* ses-2 common element status */
  36 enum enclosure_status {
  37         ENCLOSURE_STATUS_UNSUPPORTED = 0,
  38         ENCLOSURE_STATUS_OK,
  39         ENCLOSURE_STATUS_CRITICAL,
  40         ENCLOSURE_STATUS_NON_CRITICAL,
  41         ENCLOSURE_STATUS_UNRECOVERABLE,
  42         ENCLOSURE_STATUS_NOT_INSTALLED,
  43         ENCLOSURE_STATUS_UNKNOWN,
  44         ENCLOSURE_STATUS_UNAVAILABLE,
  45         /* last element for counting purposes */
  46         ENCLOSURE_STATUS_MAX
  47 };
  48
  49 /* SFF-8485 activity light settings */
  50 enum enclosure_component_setting {
  51         ENCLOSURE_SETTING_DISABLED = 0,
  52         ENCLOSURE_SETTING_ENABLED = 1,
  53         ENCLOSURE_SETTING_BLINK_A_ON_OFF = 2,
  54         ENCLOSURE_SETTING_BLINK_A_OFF_ON = 3,
  55         ENCLOSURE_SETTING_BLINK_B_ON_OFF = 6,
  56         ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7,
  57 };
  58
  59 struct enclosure_device;
  60 struct enclosure_component;
  61 struct enclosure_component_callbacks {
  62         void (*get_status)(struct enclosure_device *,
  63                              struct enclosure_component *);
  64         int (*set_status)(struct enclosure_device *,
  65                           struct enclosure_component *,
  66                           enum enclosure_status);
  67         void (*get_fault)(struct enclosure_device *,
  68                           struct enclosure_component *);
  69         int (*set_fault)(struct enclosure_device *,
  70                          struct enclosure_component *,
  71                          enum enclosure_component_setting);
  72         void (*get_active)(struct enclosure_device *,
  73                            struct enclosure_component *);
  74         int (*set_active)(struct enclosure_device *,
  75                           struct enclosure_component *,
  76                           enum enclosure_component_setting);
  77         void (*get_locate)(struct enclosure_device *,
  78                            struct enclosure_component *);
  79         int (*set_locate)(struct enclosure_device *,
  80                           struct enclosure_component *,
  81                           enum enclosure_component_setting);
  82         void (*get_power_status)(struct enclosure_device *,
  83                                  struct enclosure_component *);
  84         int (*set_power_status)(struct enclosure_device *,
  85                                 struct enclosure_component *,
  86                                 int);
  87         int (*show_id)(struct enclosure_device *, char *buf);
  88 };
  89
  90
  91 struct enclosure_component {
  92         void *scratch;
  93         struct device cdev;
  94         struct device *dev;
  95         enum enclosure_component_type type;
  96         int number;
  97         int fault;
  98         int active;
  99         int locate;
 100         int slot;
 101         enum enclosure_status status;
 102         int power_status;
 103 };
 104
 105 struct enclosure_device {
 106         void *scratch;
 107         struct list_head node;
 108         struct device edev;
 109         struct enclosure_component_callbacks *cb;
 110         int components;
 111         struct enclosure_component component[0];
 112 };
 113
 114 static inline struct enclosure_device *
 115 to_enclosure_device(struct device *dev)
 116 {
 117         return container_of(dev, struct enclosure_device, edev);
 118 }
 119
 120 static inline struct enclosure_component *
 121 to_enclosure_component(struct device *dev)
 122 {
 123         return container_of(dev, struct enclosure_component, cdev);
 124 }
 125
 126 struct enclosure_device *
 127 enclosure_register(struct device *, const char *, int,
 128                    struct enclosure_component_callbacks *);
 129 void enclosure_unregister(struct enclosure_device *);
 130 struct enclosure_component *
 131 enclosure_component_alloc(struct enclosure_device *, unsigned int,
 132                           enum enclosure_component_type, const char *);
 133 int enclosure_component_register(struct enclosure_component *);
 134 int enclosure_add_device(struct enclosure_device *enclosure, int component,
 135                          struct device *dev);
 136 int enclosure_remove_device(struct enclosure_device *, struct device *);
 137 struct enclosure_device *enclosure_find(struct device *dev,
 138                                         struct enclosure_device *start);
 139 int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *),
 140                               void *data);
 141
 142 #endif /* _LINUX_ENCLOSURE_H_ */