[mirror_ubuntu-artful-kernel.git] / drivers / w1 / w1.h

/*
 * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef __W1_H
#define __W1_H

/**
 * struct w1_reg_num - broken out slave device id
 *
 * @family: identifies the type of device
 * @id: along with family is the unique device id
 * @crc: checksum of the other bytes
 */
struct w1_reg_num
{
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__u64	family:8,
		id:48,
		crc:8;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__u64	crc:8,
		id:48,
		family:8;
#else
#error "Please fix <asm/byteorder.h>"
#endif
};

#ifdef __KERNEL__

#include <linux/completion.h>
#include <linux/device.h>
#include <linux/mutex.h>

#include "w1_family.h"

#define W1_MAXNAMELEN		32

#define W1_SEARCH		0xF0
#define W1_ALARM_SEARCH		0xEC
#define W1_CONVERT_TEMP		0x44
#define W1_SKIP_ROM		0xCC
#define W1_COPY_SCRATCHPAD	0x48
#define W1_WRITE_SCRATCHPAD	0x4E
#define W1_READ_SCRATCHPAD	0xBE
#define W1_READ_ROM		0x33
#define W1_READ_PSUPPLY		0xB4
#define W1_MATCH_ROM		0x55
#define W1_RESUME_CMD		0xA5

#define W1_SLAVE_ACTIVE		0
#define W1_SLAVE_DETACH		1

/**
 * struct w1_slave - holds a single slave device on the bus
 *
 * @owner: Points to the one wire "wire" kernel module.
 * @name: Device id is ascii.
 * @w1_slave_entry: data for the linked list
 * @reg_num: the slave id in binary
 * @refcnt: reference count, delete when 0
 * @flags: bit flags for W1_SLAVE_ACTIVE W1_SLAVE_DETACH
 * @ttl: decrement per search this slave isn't found, deatch at 0
 * @master: bus which this slave is on
 * @family: module for device family type
 * @family_data: pointer for use by the family module
 * @dev: kernel device identifier
 *
 */
struct w1_slave
{
	struct module		*owner;
	unsigned char		name[W1_MAXNAMELEN];
	struct list_head	w1_slave_entry;
	struct w1_reg_num	reg_num;
	atomic_t		refcnt;
	int			ttl;
	unsigned long		flags;

	struct w1_master	*master;
	struct w1_family	*family;
	void			*family_data;
	struct device		dev;
};

typedef void (*w1_slave_found_callback)(struct w1_master *, u64);


/**
 * struct w1_bus_master - operations available on a bus master
 *
 * @data: the first parameter in all the functions below
 *
 * @read_bit: Sample the line level @return the level read (0 or 1)
 *
 * @write_bit: Sets the line level
 *
 * @touch_bit: the lowest-level function for devices that really support the
 * 1-wire protocol.
 * touch_bit(0) = write-0 cycle
 * touch_bit(1) = write-1 / read cycle
 * @return the bit read (0 or 1)
 *
 * @read_byte: Reads a bytes. Same as 8 touch_bit(1) calls.
 * @return the byte read
 *
 * @write_byte: Writes a byte. Same as 8 touch_bit(x) calls.
 *
 * @read_block: Same as a series of read_byte() calls
 * @return the number of bytes read
 *
 * @write_block: Same as a series of write_byte() calls
 *
 * @triplet: Combines two reads and a smart write for ROM searches
 * @return bit0=Id bit1=comp_id bit2=dir_taken
 *
 * @reset_bus: long write-0 with a read for the presence pulse detection
 * @return -1=Error, 0=Device present, 1=No device present
 *
 * @set_pullup: Put out a strong pull-up pulse of the specified duration.
 * @return -1=Error, 0=completed
 *
 * @search: Really nice hardware can handles the different types of ROM search
 * w1_master* is passed to the slave found callback.
 * u8 is search_type, W1_SEARCH or W1_ALARM_SEARCH
 *
 * Note: read_bit and write_bit are very low level functions and should only
 * be used with hardware that doesn't really support 1-wire operations,
 * like a parallel/serial port.
 * Either define read_bit and write_bit OR define, at minimum, touch_bit and
 * reset_bus.
 *
 */
struct w1_bus_master
{
	void		*data;

	u8		(*read_bit)(void *);

	void		(*write_bit)(void *, u8);

	u8		(*touch_bit)(void *, u8);

	u8		(*read_byte)(void *);

	void		(*write_byte)(void *, u8);

	u8		(*read_block)(void *, u8 *, int);

	void		(*write_block)(void *, const u8 *, int);

	u8		(*triplet)(void *, u8);

	u8		(*reset_bus)(void *);

	u8		(*set_pullup)(void *, int);

	void		(*search)(void *, struct w1_master *,
		u8, w1_slave_found_callback);
};

/**
 * enum w1_master_flags - bitfields used in w1_master.flags
 * @W1_ABORT_SEARCH: abort searching early on shutdown
 * @W1_WARN_MAX_COUNT: limit warning when the maximum count is reached
 */
enum w1_master_flags {
	W1_ABORT_SEARCH = 0,
	W1_WARN_MAX_COUNT = 1,
};

/**
 * struct w1_master - one per bus master
 * @w1_master_entry:	master linked list
 * @owner:		module owner
 * @name:		dynamically allocate bus name
 * @list_mutex:		protect slist and async_list
 * @slist:		linked list of slaves
 * @async_list:		linked list of netlink commands to execute
 * @max_slave_count:	maximum number of slaves to search for at a time
 * @slave_count:	current number of slaves known
 * @attempts:		number of searches ran
 * @slave_ttl:		number of searches before a slave is timed out
 * @initialized:	prevent init/removal race conditions
 * @id:			w1 bus number
 * @search_count:	number of automatic searches to run, -1 unlimited
 * @search_id:		allows continuing a search
 * @refcnt:		reference count
 * @priv:		private data storage
 * @enable_pullup:	allows a strong pullup
 * @pullup_duration:	time for the next strong pullup
 * @flags:		one of w1_master_flags
 * @thread:		thread for bus search and netlink commands
 * @mutex:		protect most of w1_master
 * @bus_mutex:		pretect concurrent bus access
 * @driver:		sysfs driver
 * @dev:		sysfs device
 * @bus_master:		io operations available
 * @seq:		sequence number used for netlink broadcasts
 */
struct w1_master
{
	struct list_head	w1_master_entry;
	struct module		*owner;
	unsigned char		name[W1_MAXNAMELEN];
	/* list_mutex protects just slist and async_list so slaves can be
	 * searched for and async commands added while the master has
	 * w1_master.mutex locked and is operating on the bus.
	 * lock order w1_mlock, w1_master.mutex, w1_master.list_mutex
	 */
	struct mutex		list_mutex;
	struct list_head	slist;
	struct list_head	async_list;
	int			max_slave_count, slave_count;
	unsigned long		attempts;
	int			slave_ttl;
	int			initialized;
	u32			id;
	int			search_count;
	/* id to start searching on, to continue a search or 0 to restart */
	u64			search_id;

	atomic_t		refcnt;

	void			*priv;

	/** 5V strong pullup enabled flag, 1 enabled, zero disabled. */
	int			enable_pullup;
	/** 5V strong pullup duration in milliseconds, zero disabled. */
	int			pullup_duration;

	long			flags;

	struct task_struct	*thread;
	struct mutex		mutex;
	struct mutex		bus_mutex;

	struct device_driver	*driver;
	struct device		dev;

	struct w1_bus_master	*bus_master;

	u32			seq;
};

/**
 * 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 *);
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);

u8 w1_triplet(struct w1_master *dev, int bdir);
void w1_write_8(struct w1_master *, u8);
u8 w1_read_8(struct w1_master *);
int w1_reset_bus(struct w1_master *);
u8 w1_calc_crc8(u8 *, int);
void w1_write_block(struct w1_master *, const u8 *, int);
void w1_touch_block(struct w1_master *, u8 *, int);
u8 w1_read_block(struct w1_master *, u8 *, int);
int w1_reset_select_slave(struct w1_slave *sl);
int w1_reset_resume_command(struct w1_master *);
void w1_next_pullup(struct w1_master *, int);

static inline struct w1_slave* dev_to_w1_slave(struct device *dev)
{
	return container_of(dev, struct w1_slave, dev);
}

static inline struct w1_slave* kobj_to_w1_slave(struct kobject *kobj)
{
	return dev_to_w1_slave(container_of(kobj, struct device, kobj));
}

static inline struct w1_master* dev_to_w1_master(struct device *dev)
{
	return container_of(dev, struct w1_master, dev);
}

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 int w1_process_callbacks(struct w1_master *dev);
extern int w1_process(void *);

#endif /* __KERNEL__ */

#endif /* __W1_H */
Commit	Line	Data
1da177e4	1	/*
a8018766	2	* Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
7785925d	3	*
1da177e4 LT	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.
1da177e4 LT	13	*/
	14
	15	#ifndef __W1_H
	16	#define __W1_H
	17
b3be177a DF	18	/**
	19	* struct w1_reg_num - broken out slave device id
	20	*
	21	* @family: identifies the type of device
	22	* @id: along with family is the unique device id
	23	* @crc: checksum of the other bytes
	24	*/
1da177e4 LT	25	struct w1_reg_num
	26	{
	27	#if defined(__LITTLE_ENDIAN_BITFIELD)
6b729861 EP	28	__u64 family:8,
	29	id:48,
	30	crc:8;
1da177e4 LT	31	#elif defined(__BIG_ENDIAN_BITFIELD)
	32	__u64 crc:8,
	33	id:48,
	34	family:8;
	35	#else
	36	#error "Please fix <asm/byteorder.h>"
	37	#endif
	38	};
	39
	40	#ifdef __KERNEL__
	41
	42	#include <linux/completion.h>
	43	#include <linux/device.h>
abd52a13	44	#include <linux/mutex.h>
1da177e4 LT	45
	46	#include "w1_family.h"
	47
	48	#define W1_MAXNAMELEN 32
1da177e4 LT	49
1da177e4 LT	50	#define W1_SEARCH 0xF0
12003375	51	#define W1_ALARM_SEARCH 0xEC
1da177e4 LT	52	#define W1_CONVERT_TEMP 0x44
1da177e4 LT	53	#define W1_SKIP_ROM 0xCC
0a19f129 BS	54	#define W1_COPY_SCRATCHPAD 0x48
0a19f129 BS	55	#define W1_WRITE_SCRATCHPAD 0x4E
1da177e4 LT	56	#define W1_READ_SCRATCHPAD 0xBE
	57	#define W1_READ_ROM 0x33
	58	#define W1_READ_PSUPPLY 0xB4
	59	#define W1_MATCH_ROM 0x55
67dfd54c	60	#define W1_RESUME_CMD 0xA5
1da177e4	61
f522d239	62	#define W1_SLAVE_ACTIVE 0
9fcbbac5	63	#define W1_SLAVE_DETACH 1
1da177e4	64
b3be177a DF	65	/**
	66	* struct w1_slave - holds a single slave device on the bus
	67	*
	68	* @owner: Points to the one wire "wire" kernel module.
	69	* @name: Device id is ascii.
	70	* @w1_slave_entry: data for the linked list
	71	* @reg_num: the slave id in binary
	72	* @refcnt: reference count, delete when 0
	73	* @flags: bit flags for W1_SLAVE_ACTIVE W1_SLAVE_DETACH
	74	* @ttl: decrement per search this slave isn't found, deatch at 0
	75	* @master: bus which this slave is on
	76	* @family: module for device family type
	77	* @family_data: pointer for use by the family module
	78	* @dev: kernel device identifier
	79	*
	80	*/
1da177e4 LT	81	struct w1_slave
	82	{
	83	struct module *owner;
	84	unsigned char name[W1_MAXNAMELEN];
	85	struct list_head w1_slave_entry;
	86	struct w1_reg_num reg_num;
	87	atomic_t refcnt;
1da177e4	88	int ttl;
bb670937	89	unsigned long flags;
1da177e4 LT	90
1da177e4 LT	91	struct w1_master *master;
7785925d	92	struct w1_family *family;
a45f105a	93	void *family_data;
7785925d	94	struct device dev;
1da177e4 LT	95	};
1da177e4 LT	96
c30c9b15	97	typedef void (w1_slave_found_callback)(struct w1_master , u64);
1da177e4	98
6b729861 EP	99
6b729861 EP	100	/**
b3be177a DF	101	* struct w1_bus_master - operations available on a bus master
	102	*
	103	* @data: the first parameter in all the functions below
	104	*
	105	* @read_bit: Sample the line level @return the level read (0 or 1)
	106	*
	107	* @write_bit: Sets the line level
	108	*
	109	* @touch_bit: the lowest-level function for devices that really support the
	110	* 1-wire protocol.
	111	* touch_bit(0) = write-0 cycle
	112	* touch_bit(1) = write-1 / read cycle
	113	* @return the bit read (0 or 1)
	114	*
	115	* @read_byte: Reads a bytes. Same as 8 touch_bit(1) calls.
	116	* @return the byte read
	117	*
	118	* @write_byte: Writes a byte. Same as 8 touch_bit(x) calls.
	119	*
	120	* @read_block: Same as a series of read_byte() calls
	121	* @return the number of bytes read
	122	*
	123	* @write_block: Same as a series of write_byte() calls
	124	*
	125	* @triplet: Combines two reads and a smart write for ROM searches
	126	* @return bit0=Id bit1=comp_id bit2=dir_taken
	127	*
	128	* @reset_bus: long write-0 with a read for the presence pulse detection
	129	* @return -1=Error, 0=Device present, 1=No device present
	130	*
	131	* @set_pullup: Put out a strong pull-up pulse of the specified duration.
	132	* @return -1=Error, 0=completed
	133	*
	134	* @search: Really nice hardware can handles the different types of ROM search
	135	* w1_master* is passed to the slave found callback.
	136	* u8 is search_type, W1_SEARCH or W1_ALARM_SEARCH
	137	*
6b729861 EP	138	* Note: read_bit and write_bit are very low level functions and should only
	139	* be used with hardware that doesn't really support 1-wire operations,
	140	* like a parallel/serial port.
	141	* Either define read_bit and write_bit OR define, at minimum, touch_bit and
	142	* reset_bus.
b3be177a	143	*
6b729861	144	*/
1da177e4 LT	145	struct w1_bus_master
1da177e4 LT	146	{
ccd69940	147	void *data;
6b729861	148
ccd69940	149	u8 (read_bit)(void );
6b729861	150
ccd69940	151	void (write_bit)(void , u8);
6b729861	152
ccd69940	153	u8 (touch_bit)(void , u8);
6b729861	154
ccd69940	155	u8 (read_byte)(void );
6b729861	156
ccd69940	157	void (write_byte)(void , u8);
6b729861	158
ccd69940	159	u8 (read_block)(void , u8 *, int);
6b729861	160
ccd69940	161	void (write_block)(void , const u8 *, int);
6b729861	162
ccd69940	163	u8 (triplet)(void , u8);
6b729861	164
ccd69940	165	u8 (reset_bus)(void );
6b729861	166
6a158c0d DF	167	u8 (set_pullup)(void , int);
6a158c0d DF	168
c30c9b15 DF	169	void (search)(void , struct w1_master *,
c30c9b15 DF	170	u8, w1_slave_found_callback);
1da177e4 LT	171	};
1da177e4 LT	172
42105698 DF	173	/**
	174	* enum w1_master_flags - bitfields used in w1_master.flags
	175	* @W1_ABORT_SEARCH: abort searching early on shutdown
a1613056	176	* @W1_WARN_MAX_COUNT: limit warning when the maximum count is reached
42105698 DF	177	*/
	178	enum w1_master_flags {
	179	W1_ABORT_SEARCH = 0,
a1613056	180	W1_WARN_MAX_COUNT = 1,
42105698 DF	181	};
42105698 DF	182
b3be177a DF	183	/**
	184	* struct w1_master - one per bus master
	185	* @w1_master_entry: master linked list
	186	* @owner: module owner
	187	* @name: dynamically allocate bus name
	188	* @list_mutex: protect slist and async_list
	189	* @slist: linked list of slaves
	190	* @async_list: linked list of netlink commands to execute
	191	* @max_slave_count: maximum number of slaves to search for at a time
	192	* @slave_count: current number of slaves known
	193	* @attempts: number of searches ran
	194	* @slave_ttl: number of searches before a slave is timed out
	195	* @initialized: prevent init/removal race conditions
	196	* @id: w1 bus number
	197	* @search_count: number of automatic searches to run, -1 unlimited
	198	* @search_id: allows continuing a search
	199	* @refcnt: reference count
	200	* @priv: private data storage
b3be177a DF	201	* @enable_pullup: allows a strong pullup
	202	* @pullup_duration: time for the next strong pullup
	203	* @flags: one of w1_master_flags
	204	* @thread: thread for bus search and netlink commands
	205	* @mutex: protect most of w1_master
	206	* @bus_mutex: pretect concurrent bus access
	207	* @driver: sysfs driver
	208	* @dev: sysfs device
	209	* @bus_master: io operations available
	210	* @seq: sequence number used for netlink broadcasts
b3be177a	211	*/
1da177e4 LT	212	struct w1_master
	213	{
	214	struct list_head w1_master_entry;
	215	struct module *owner;
	216	unsigned char name[W1_MAXNAMELEN];
9fcbbac5 DF	217	/* list_mutex protects just slist and async_list so slaves can be
	218	* searched for and async commands added while the master has
	219	* w1_master.mutex locked and is operating on the bus.
b3be177a	220	* lock order w1_mlock, w1_master.mutex, w1_master.list_mutex
9fcbbac5 DF	221	*/
9fcbbac5 DF	222	struct mutex list_mutex;
1da177e4	223	struct list_head slist;
9fcbbac5	224	struct list_head async_list;
1da177e4 LT	225	int max_slave_count, slave_count;
	226	unsigned long attempts;
	227	int slave_ttl;
	228	int initialized;
	229	u32 id;
2a9d0c17	230	int search_count;
3c6955e5 DF	231	/* id to start searching on, to continue a search or 0 to restart */
3c6955e5 DF	232	u64 search_id;
1da177e4 LT	233
	234	atomic_t refcnt;
	235
	236	void *priv;
1da177e4	237
6a158c0d DF	238	/** 5V strong pullup enabled flag, 1 enabled, zero disabled. */
	239	int enable_pullup;
	240	/** 5V strong pullup duration in milliseconds, zero disabled. */
	241	int pullup_duration;
	242
42105698 DF	243	long flags;
42105698 DF	244
674a396c	245	struct task_struct *thread;
abd52a13	246	struct mutex mutex;
b02f8bed	247	struct mutex bus_mutex;
1da177e4 LT	248
1da177e4 LT	249	struct device_driver *driver;
7785925d	250	struct device dev;
1da177e4 LT	251
	252	struct w1_bus_master *bus_master;
	253
12003375	254	u32 seq;
1da177e4 LT	255	};
1da177e4 LT	256
9fcbbac5 DF	257	/**
	258	* struct w1_async_cmd - execute callback from the w1_process kthread
	259	* @async_entry: link entry
	260	* @cb: callback function, must list_del and destroy this list before
	261	* returning
	262	*
	263	* When inserted into the w1_master async_list, w1_process will execute
	264	* the callback. Embed this into the structure with the command details.
	265	*/
	266	struct w1_async_cmd {
	267	struct list_head async_entry;
	268	void (cb)(struct w1_master dev, struct w1_async_cmd *async_cmd);
	269	};
	270
1da177e4	271	int w1_create_master_attributes(struct w1_master *);
c30c9b15	272	void w1_destroy_master_attributes(struct w1_master *master);
12003375 EP	273	void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb);
12003375 EP	274	void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb);
9fcbbac5	275	/* call w1_unref_slave to release the reference counts w1_search_slave added */
12003375	276	struct w1_slave w1_search_slave(struct w1_reg_num id);
9fcbbac5 DF	277	/* decrements the reference on sl->master and sl, and cleans up if zero
	278	* returns the reference count after it has been decremented */
	279	int w1_unref_slave(struct w1_slave *sl);
963bb101 DF	280	void w1_slave_found(struct w1_master *dev, u64 rn);
	281	void w1_search_process_cb(struct w1_master *dev, u8 search_type,
	282	w1_slave_found_callback cb);
70b34d2e DF	283	struct w1_slave w1_slave_search_device(struct w1_master dev,
70b34d2e DF	284	struct w1_reg_num *rn);
12003375 EP	285	struct w1_master *w1_search_master_id(u32 id);
12003375 EP	286
c30c9b15 DF	287	/* Disconnect and reconnect devices in the given family. Used for finding
	288	* unclaimed devices after a family has been registered or releasing devices
	289	* after a family has been unregistered. Set attach to 1 when a new family
	290	* has just been registered, to 0 when it has been unregistered.
	291	*/
	292	void w1_reconnect_slaves(struct w1_family *f, int attach);
70b34d2e	293	int w1_attach_slave_device(struct w1_master dev, struct w1_reg_num rn);
9fcbbac5 DF	294	/* 0 success, otherwise EBUSY */
9fcbbac5 DF	295	int w1_slave_detach(struct w1_slave *sl);
c30c9b15	296
12003375 EP	297	u8 w1_triplet(struct w1_master *dev, int bdir);
12003375 EP	298	void w1_write_8(struct w1_master *, u8);
34e453d4	299	u8 w1_read_8(struct w1_master *);
12003375 EP	300	int w1_reset_bus(struct w1_master *);
	301	u8 w1_calc_crc8(u8 *, int);
	302	void w1_write_block(struct w1_master , const u8 , int);
9be62e0b	303	void w1_touch_block(struct w1_master , u8 , int);
12003375 EP	304	u8 w1_read_block(struct w1_master , u8 , int);
12003375 EP	305	int w1_reset_select_slave(struct w1_slave *sl);
67dfd54c	306	int w1_reset_resume_command(struct w1_master *);
6a158c0d	307	void w1_next_pullup(struct w1_master *, int);
1da177e4	308
db2d0008 EP	309	static inline struct w1_slave* dev_to_w1_slave(struct device *dev)
	310	{
	311	return container_of(dev, struct w1_slave, dev);
	312	}
	313
	314	static inline struct w1_slave* kobj_to_w1_slave(struct kobject *kobj)
	315	{
	316	return dev_to_w1_slave(container_of(kobj, struct device, kobj));
	317	}
	318
	319	static inline struct w1_master* dev_to_w1_master(struct device *dev)
	320	{
	321	return container_of(dev, struct w1_master, dev);
	322	}
	323
2c5bfdac	324	extern struct device_driver w1_master_driver;
2c5bfdac EP	325	extern struct device w1_master_device;
	326	extern int w1_max_slave_count;
	327	extern int w1_max_slave_ttl;
	328	extern struct list_head w1_masters;
	329	extern struct mutex w1_mlock;
	330
9fcbbac5	331	extern int w1_process_callbacks(struct w1_master *dev);
2c5bfdac EP	332	extern int w1_process(void *);
2c5bfdac EP	333
1da177e4 LT	334	#endif /* __KERNEL__ */
	335
	336	#endif /* __W1_H */