drivers/w1/w1_internal.h

   1 /*
   2  * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef __W1_H
  16 #define __W1_H
  17
  18 #include <linux/w1.h>
  19
  20 #include <linux/completion.h>
  21 #include <linux/mutex.h>
  22
  23 #define W1_SLAVE_ACTIVE         0
  24 #define W1_SLAVE_DETACH         1
  25
  26 /**
  27  * struct w1_async_cmd - execute callback from the w1_process kthread
  28  * @async_entry: link entry
  29  * @cb: callback function, must list_del and destroy this list before
  30  * returning
  31  *
  32  * When inserted into the w1_master async_list, w1_process will execute
  33  * the callback.  Embed this into the structure with the command details.
  34  */
  35 struct w1_async_cmd {
  36         struct list_head        async_entry;
  37         void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd);
  38 };
  39
  40 int w1_create_master_attributes(struct w1_master *master);
  41 void w1_destroy_master_attributes(struct w1_master *master);
  42 void w1_search(struct w1_master *dev, u8 search_type,
  43                w1_slave_found_callback cb);
  44 void w1_search_devices(struct w1_master *dev, u8 search_type,
  45                        w1_slave_found_callback cb);
  46 /* call w1_unref_slave to release the reference counts w1_search_slave added */
  47 struct w1_slave *w1_search_slave(struct w1_reg_num *id);
  48 /*
  49  * decrements the reference on sl->master and sl, and cleans up if zero
  50  * returns the reference count after it has been decremented
  51  */
  52 int w1_unref_slave(struct w1_slave *sl);
  53 void w1_slave_found(struct w1_master *dev, u64 rn);
  54 void w1_search_process_cb(struct w1_master *dev, u8 search_type,
  55                           w1_slave_found_callback cb);
  56 struct w1_slave *w1_slave_search_device(struct w1_master *dev,
  57                                         struct w1_reg_num *rn);
  58 struct w1_master *w1_search_master_id(u32 id);
  59
  60 /* Disconnect and reconnect devices in the given family.  Used for finding
  61  * unclaimed devices after a family has been registered or releasing devices
  62  * after a family has been unregistered.  Set attach to 1 when a new family
  63  * has just been registered, to 0 when it has been unregistered.
  64  */
  65 void w1_reconnect_slaves(struct w1_family *f, int attach);
  66 int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
  67 /* 0 success, otherwise EBUSY */
  68 int w1_slave_detach(struct w1_slave *sl);
  69
  70 void __w1_remove_master_device(struct w1_master *dev);
  71
  72 void w1_family_put(struct w1_family *f);
  73 void __w1_family_get(struct w1_family *f);
  74 struct w1_family *w1_family_registered(u8 fid);
  75
  76 extern struct device_driver w1_master_driver;
  77 extern struct device w1_master_device;
  78 extern int w1_max_slave_count;
  79 extern int w1_max_slave_ttl;
  80 extern struct list_head w1_masters;
  81 extern struct mutex w1_mlock;
  82 extern spinlock_t w1_flock;
  83
  84 int w1_process_callbacks(struct w1_master *dev);
  85 int w1_process(void *data);
  86
  87 #endif /* __W1_H */