diff options
Diffstat (limited to 'drivers/w1/w1_internal.h')
| -rw-r--r-- | drivers/w1/w1_internal.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/w1/w1_internal.h b/drivers/w1/w1_internal.h new file mode 100644 index 000000000..cb5a74e99 --- /dev/null +++ b/drivers/w1/w1_internal.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net> + */ + +#ifndef __W1_H +#define __W1_H + +#include <linux/w1.h> + +#include <linux/completion.h> +#include <linux/mutex.h> + +#define W1_SLAVE_ACTIVE 0 +#define W1_SLAVE_DETACH 1 + +/** + * struct w1_async_cmd - execute callback from the w1_process kthread + * @async_entry: link entry + * @cb: callback function, must list_del and destroy this list before + * returning + * + * When inserted into the w1_master async_list, w1_process will execute + * the callback. Embed this into the structure with the command details. + */ +struct w1_async_cmd { + struct list_head async_entry; + void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd); +}; + +int w1_create_master_attributes(struct w1_master *master); +void w1_destroy_master_attributes(struct w1_master *master); +void w1_search(struct w1_master *dev, u8 search_type, + w1_slave_found_callback cb); +void w1_search_devices(struct w1_master *dev, u8 search_type, + w1_slave_found_callback cb); +/* call w1_unref_slave to release the reference counts w1_search_slave added */ +struct w1_slave *w1_search_slave(struct w1_reg_num *id); +/* + * decrements the reference on sl->master and sl, and cleans up if zero + * returns the reference count after it has been decremented + */ +int w1_unref_slave(struct w1_slave *sl); +void w1_slave_found(struct w1_master *dev, u64 rn); +void w1_search_process_cb(struct w1_master *dev, u8 search_type, + w1_slave_found_callback cb); +struct w1_slave *w1_slave_search_device(struct w1_master *dev, + struct w1_reg_num *rn); +struct w1_master *w1_search_master_id(u32 id); + +/* Disconnect and reconnect devices in the given family. Used for finding + * unclaimed devices after a family has been registered or releasing devices + * after a family has been unregistered. Set attach to 1 when a new family + * has just been registered, to 0 when it has been unregistered. + */ +void w1_reconnect_slaves(struct w1_family *f, int attach); +int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn); +/* 0 success, otherwise EBUSY */ +int w1_slave_detach(struct w1_slave *sl); + +void __w1_remove_master_device(struct w1_master *dev); + +void w1_family_put(struct w1_family *f); +void __w1_family_get(struct w1_family *f); +struct w1_family *w1_family_registered(u8 fid); + +extern struct device_driver w1_master_driver; +extern struct device w1_master_device; +extern int w1_max_slave_count; +extern int w1_max_slave_ttl; +extern struct list_head w1_masters; +extern struct mutex w1_mlock; +extern spinlock_t w1_flock; + +int w1_process_callbacks(struct w1_master *dev); +int w1_process(void *data); + +#endif /* __W1_H */ |