drivers/w1/w1_family.h

   1 /*
   2  *      w1_family.h
   3  *
   4  * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
   5  *
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #ifndef __W1_FAMILY_H
  23 #define __W1_FAMILY_H
  24
  25 #include <linux/types.h>
  26 #include <linux/device.h>
  27 #include <linux/atomic.h>
  28
  29 #define W1_FAMILY_DEFAULT       0
  30 #define W1_FAMILY_BQ27000       0x01
  31 #define W1_FAMILY_SMEM_01       0x01
  32 #define W1_FAMILY_SMEM_81       0x81
  33 #define W1_THERM_DS18S20        0x10
  34 #define W1_FAMILY_DS28E04       0x1C
  35 #define W1_COUNTER_DS2423       0x1D
  36 #define W1_THERM_DS1822         0x22
  37 #define W1_EEPROM_DS2433        0x23
  38 #define W1_THERM_DS18B20        0x28
  39 #define W1_FAMILY_DS2408        0x29
  40 #define W1_EEPROM_DS2431        0x2D
  41 #define W1_FAMILY_DS2760        0x30
  42 #define W1_FAMILY_DS2780        0x32
  43 #define W1_FAMILY_DS2413        0x3A
  44 #define W1_FAMILY_DS2406        0x12
  45 #define W1_THERM_DS1825         0x3B
  46 #define W1_FAMILY_DS2781        0x3D
  47 #define W1_THERM_DS28EA00       0x42
  48
  49 #define MAXNAMELEN              32
  50
  51 struct w1_slave;
  52
  53 /**
  54  * struct w1_family_ops - operations for a family type
  55  * @add_slave: add_slave
  56  * @remove_slave: remove_slave
  57  * @groups: sysfs group
  58  */
  59 struct w1_family_ops
  60 {
  61         int  (* add_slave)(struct w1_slave *);
  62         void (* remove_slave)(struct w1_slave *);
  63         const struct attribute_group **groups;
  64 };
  65
  66 /**
  67  * struct w1_family - reference counted family structure.
  68  * @family_entry:       family linked list
  69  * @fid:                8 bit family identifier
  70  * @fops:               operations for this family
  71  * @refcnt:             reference counter
  72  */
  73 struct w1_family
  74 {
  75         struct list_head        family_entry;
  76         u8                      fid;
  77
  78         struct w1_family_ops    *fops;
  79
  80         atomic_t                refcnt;
  81 };
  82
  83 extern spinlock_t w1_flock;
  84
  85 void w1_family_put(struct w1_family *);
  86 void __w1_family_get(struct w1_family *);
  87 struct w1_family * w1_family_registered(u8);
  88 void w1_unregister_family(struct w1_family *);
  89 int w1_register_family(struct w1_family *);
  90
  91 /**
  92  * module_w1_driver() - Helper macro for registering a 1-Wire families
  93  * @__w1_family: w1_family struct
  94  *
  95  * Helper macro for 1-Wire families which do not do anything special in module
  96  * init/exit. This eliminates a lot of boilerplate. Each module may only
  97  * use this macro once, and calling it replaces module_init() and module_exit()
  98  */
  99 #define module_w1_family(__w1_family) \
 100         module_driver(__w1_family, w1_register_family, \
 101                         w1_unregister_family)
 102
 103 #endif /* __W1_FAMILY_H */