LXR linux/drivers/w1/w1

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
   4 */
   5
   6#ifndef __W1_H
   7#define __W1_H
   8
   9#include <linux/w1.h>
  10
  11#include <linux/completion.h>
  12#include <linux/mutex.h>
  13
  14#define W1_SLAVE_ACTIVE         0
  15#define W1_SLAVE_DETACH         1
  16
  17/**
  18 * struct w1_async_cmd - execute callback from the w1_process kthread
  19 * @async_entry: link entry
  20 * @cb: callback function, must list_del and destroy this list before
  21 * returning
  22 *
  23 * When inserted into the w1_master async_list, w1_process will execute
  24 * the callback.  Embed this into the structure with the command details.
  25 */
  26struct w1_async_cmd {
  27        struct list_head        async_entry;
  28        void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd);
  29};
  30
  31int w1_create_master_attributes(struct w1_master *master);
  32void w1_destroy_master_attributes(struct w1_master *master);
  33void w1_search(struct w1_master *dev, u8 search_type,
  34               w1_slave_found_callback cb);
  35void w1_search_devices(struct w1_master *dev, u8 search_type,
  36                       w1_slave_found_callback cb);
  37/* call w1_unref_slave to release the reference counts w1_search_slave added */
  38struct w1_slave *w1_search_slave(struct w1_reg_num *id);
  39/*
  40 * decrements the reference on sl->master and sl, and cleans up if zero
  41 * returns the reference count after it has been decremented
  42 */
  43int w1_unref_slave(struct w1_slave *sl);
  44void w1_slave_found(struct w1_master *dev, u64 rn);
  45void w1_search_process_cb(struct w1_master *dev, u8 search_type,
  46                          w1_slave_found_callback cb);
  47struct w1_slave *w1_slave_search_device(struct w1_master *dev,
  48                                        struct w1_reg_num *rn);
  49struct w1_master *w1_search_master_id(u32 id);
  50
  51/* Disconnect and reconnect devices in the given family.  Used for finding
  52 * unclaimed devices after a family has been registered or releasing devices
  53 * after a family has been unregistered.  Set attach to 1 when a new family
  54 * has just been registered, to 0 when it has been unregistered.
  55 */
  56void w1_reconnect_slaves(struct w1_family *f, int attach);
  57int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
  58/* 0 success, otherwise EBUSY */
  59int w1_slave_detach(struct w1_slave *sl);
  60
  61void __w1_remove_master_device(struct w1_master *dev);
  62
  63void w1_family_put(struct w1_family *f);
  64void __w1_family_get(struct w1_family *f);
  65struct w1_family *w1_family_registered(u8 fid);
  66
  67extern struct device_driver w1_master_driver;
  68extern struct device w1_master_device;
  69extern int w1_max_slave_count;
  70extern int w1_max_slave_ttl;
  71extern struct list_head w1_masters;
  72extern struct mutex w1_mlock;
  73extern spinlock_t w1_flock;
  74
  75int w1_process_callbacks(struct w1_master *dev);
  76int w1_process(void *data);
  77
  78#endif /* __W1_H */
  79