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  */
26 struct w1_async_cmd {
27 	struct list_head	async_entry;
28 	void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd);
29 };
30 
31 int w1_create_master_attributes(struct w1_master *master);
32 void w1_destroy_master_attributes(struct w1_master *master);
33 void w1_search(struct w1_master *dev, u8 search_type,
34 	       w1_slave_found_callback cb);
35 void 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 */
38 struct 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  */
43 int w1_unref_slave(struct w1_slave *sl);
44 void w1_slave_found(struct w1_master *dev, u64 rn);
45 void w1_search_process_cb(struct w1_master *dev, u8 search_type,
46 			  w1_slave_found_callback cb);
47 struct w1_slave *w1_slave_search_device(struct w1_master *dev,
48 					struct w1_reg_num *rn);
49 struct 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  */
56 void w1_reconnect_slaves(struct w1_family *f, int attach);
57 int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
58 /* 0 success, otherwise EBUSY */
59 int w1_slave_detach(struct w1_slave *sl);
60 
61 void __w1_remove_master_device(struct w1_master *dev);
62 
63 void w1_family_put(struct w1_family *f);
64 void __w1_family_get(struct w1_family *f);
65 struct w1_family *w1_family_registered(u8 fid);
66 
67 extern struct device_driver w1_master_driver;
68 extern struct device w1_master_device;
69 extern int w1_max_slave_count;
70 extern int w1_max_slave_ttl;
71 extern struct list_head w1_masters;
72 extern struct mutex w1_mlock;
73 extern spinlock_t w1_flock;
74 
75 int w1_process_callbacks(struct w1_master *dev);
76 int w1_process(void *data);
77 
78 #endif /* __W1_H */
79