drivers/w1/w1.h

   1 /*
   2  *      w1.h
   3  *
   4  * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
   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_H
  23 #define __W1_H
  24
  25 struct w1_reg_num
  26 {
  27 #if defined(__LITTLE_ENDIAN_BITFIELD)
  28         __u64   family:8,
  29                 id:48,
  30                 crc:8;
  31 #elif defined(__BIG_ENDIAN_BITFIELD)
  32         __u64   crc:8,
  33                 id:48,
  34                 family:8;
  35 #else
  36 #error "Please fix <asm/byteorder.h>"
  37 #endif
  38 };
  39
  40 #ifdef __KERNEL__
  41
  42 #include <linux/completion.h>
  43 #include <linux/device.h>
  44
  45 #include <net/sock.h>
  46
  47 #include <asm/semaphore.h>
  48
  49 #include "w1_family.h"
  50
  51 #define W1_MAXNAMELEN           32
  52 #define W1_SLAVE_DATA_SIZE      128
  53
  54 #define W1_SEARCH               0xF0
  55 #define W1_CONDITIONAL_SEARCH   0xEC
  56 #define W1_CONVERT_TEMP         0x44
  57 #define W1_SKIP_ROM             0xCC
  58 #define W1_READ_SCRATCHPAD      0xBE
  59 #define W1_READ_ROM             0x33
  60 #define W1_READ_PSUPPLY         0xB4
  61 #define W1_MATCH_ROM            0x55
  62
  63 #define W1_SLAVE_ACTIVE         (1<<0)
  64
  65 struct w1_slave
  66 {
  67         struct module           *owner;
  68         unsigned char           name[W1_MAXNAMELEN];
  69         struct list_head        w1_slave_entry;
  70         struct w1_reg_num       reg_num;
  71         atomic_t                refcnt;
  72         u8                      rom[9];
  73         u32                     flags;
  74         int                     ttl;
  75
  76         struct w1_master        *master;
  77         struct w1_family        *family;
  78         struct device           dev;
  79         struct completion       dev_released;
  80
  81         struct bin_attribute    attr_bin;
  82         struct device_attribute attr_name, attr_val;
  83 };
  84
  85 typedef void (* w1_slave_found_callback)(unsigned long, u64);
  86
  87 struct w1_bus_master
  88 {
  89         unsigned long           data;
  90
  91         u8                      (*read_bit)(unsigned long);
  92         void                    (*write_bit)(unsigned long, u8);
  93
  94         u8                      (*read_byte)(unsigned long);
  95         void                    (*write_byte)(unsigned long, u8);
  96
  97         u8                      (*read_block)(unsigned long, u8 *, int);
  98         void                    (*write_block)(unsigned long, u8 *, int);
  99
 100         u8                      (*touch_bit)(unsigned long, u8);
 101
 102         u8                      (*reset_bus)(unsigned long);
 103
 104         void                    (*search)(unsigned long, w1_slave_found_callback);
 105 };
 106
 107 struct w1_master
 108 {
 109         struct list_head        w1_master_entry;
 110         struct module           *owner;
 111         unsigned char           name[W1_MAXNAMELEN];
 112         struct list_head        slist;
 113         int                     max_slave_count, slave_count;
 114         unsigned long           attempts;
 115         int                     slave_ttl;
 116         int                     initialized;
 117         u32                     id;
 118
 119         atomic_t                refcnt;
 120
 121         void                    *priv;
 122         int                     priv_size;
 123
 124         int                     need_exit;
 125         pid_t                   kpid;
 126         struct semaphore        mutex;
 127
 128         struct device_driver    *driver;
 129         struct device           dev;
 130         struct completion       dev_released;
 131         struct completion       dev_exited;
 132
 133         struct w1_bus_master    *bus_master;
 134
 135         u32                     seq, groups;
 136         struct sock             *nls;
 137 };
 138
 139 int w1_create_master_attributes(struct w1_master *);
 140 void w1_destroy_master_attributes(struct w1_master *);
 141 void w1_search(struct w1_master *dev);
 142
 143 #endif /* __KERNEL__ */
 144
 145 #endif /* __W1_H */