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