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