[deliverable/linux.git] / drivers / w1 / w1.h

/*
 *	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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#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_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	/*
7785925d	2	* w1.h
1da177e4	3	*
a8018766	4	* Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
7785925d	5	*
1da177e4 LT	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#ifndef __W1_H
	23	#define __W1_H
	24
b3be177a DF	25	/**
	26	* struct w1_reg_num - broken out slave device id
	27	*
	28	* @family: identifies the type of device
	29	* @id: along with family is the unique device id
	30	* @crc: checksum of the other bytes
	31	*/
1da177e4 LT	32	struct w1_reg_num
	33	{
	34	#if defined(__LITTLE_ENDIAN_BITFIELD)
6b729861 EP	35	__u64 family:8,
	36	id:48,
	37	crc:8;
1da177e4 LT	38	#elif defined(__BIG_ENDIAN_BITFIELD)
	39	__u64 crc:8,
	40	id:48,
	41	family:8;
	42	#else
	43	#error "Please fix <asm/byteorder.h>"
	44	#endif
	45	};
	46
	47	#ifdef __KERNEL__
	48
	49	#include <linux/completion.h>
	50	#include <linux/device.h>
abd52a13	51	#include <linux/mutex.h>
1da177e4 LT	52
	53	#include "w1_family.h"
	54
	55	#define W1_MAXNAMELEN 32
1da177e4 LT	56
1da177e4 LT	57	#define W1_SEARCH 0xF0
12003375	58	#define W1_ALARM_SEARCH 0xEC
1da177e4 LT	59	#define W1_CONVERT_TEMP 0x44
	60	#define W1_SKIP_ROM 0xCC
	61	#define W1_READ_SCRATCHPAD 0xBE
	62	#define W1_READ_ROM 0x33
	63	#define W1_READ_PSUPPLY 0xB4
	64	#define W1_MATCH_ROM 0x55
67dfd54c	65	#define W1_RESUME_CMD 0xA5
1da177e4	66
f522d239	67	#define W1_SLAVE_ACTIVE 0
9fcbbac5	68	#define W1_SLAVE_DETACH 1
1da177e4	69
b3be177a DF	70	/**
	71	* struct w1_slave - holds a single slave device on the bus
	72	*
	73	* @owner: Points to the one wire "wire" kernel module.
	74	* @name: Device id is ascii.
	75	* @w1_slave_entry: data for the linked list
	76	* @reg_num: the slave id in binary
	77	* @refcnt: reference count, delete when 0
	78	* @flags: bit flags for W1_SLAVE_ACTIVE W1_SLAVE_DETACH
	79	* @ttl: decrement per search this slave isn't found, deatch at 0
	80	* @master: bus which this slave is on
	81	* @family: module for device family type
	82	* @family_data: pointer for use by the family module
	83	* @dev: kernel device identifier
	84	*
	85	*/
1da177e4 LT	86	struct w1_slave
	87	{
	88	struct module *owner;
	89	unsigned char name[W1_MAXNAMELEN];
	90	struct list_head w1_slave_entry;
	91	struct w1_reg_num reg_num;
	92	atomic_t refcnt;
1da177e4	93	int ttl;
bb670937	94	unsigned long flags;
1da177e4 LT	95
1da177e4 LT	96	struct w1_master *master;
7785925d	97	struct w1_family *family;
a45f105a	98	void *family_data;
7785925d	99	struct device dev;
1da177e4 LT	100	};
1da177e4 LT	101
c30c9b15	102	typedef void (w1_slave_found_callback)(struct w1_master , u64);
1da177e4	103
6b729861 EP	104
6b729861 EP	105	/**
b3be177a DF	106	* struct w1_bus_master - operations available on a bus master
	107	*
	108	* @data: the first parameter in all the functions below
	109	*
	110	* @read_bit: Sample the line level @return the level read (0 or 1)
	111	*
	112	* @write_bit: Sets the line level
	113	*
	114	* @touch_bit: the lowest-level function for devices that really support the
	115	* 1-wire protocol.
	116	* touch_bit(0) = write-0 cycle
	117	* touch_bit(1) = write-1 / read cycle
	118	* @return the bit read (0 or 1)
	119	*
	120	* @read_byte: Reads a bytes. Same as 8 touch_bit(1) calls.
	121	* @return the byte read
	122	*
	123	* @write_byte: Writes a byte. Same as 8 touch_bit(x) calls.
	124	*
	125	* @read_block: Same as a series of read_byte() calls
	126	* @return the number of bytes read
	127	*
	128	* @write_block: Same as a series of write_byte() calls
	129	*
	130	* @triplet: Combines two reads and a smart write for ROM searches
	131	* @return bit0=Id bit1=comp_id bit2=dir_taken
	132	*
	133	* @reset_bus: long write-0 with a read for the presence pulse detection
	134	* @return -1=Error, 0=Device present, 1=No device present
	135	*
	136	* @set_pullup: Put out a strong pull-up pulse of the specified duration.
	137	* @return -1=Error, 0=completed
	138	*
	139	* @search: Really nice hardware can handles the different types of ROM search
	140	* w1_master* is passed to the slave found callback.
	141	* u8 is search_type, W1_SEARCH or W1_ALARM_SEARCH
	142	*
6b729861 EP	143	* Note: read_bit and write_bit are very low level functions and should only
	144	* be used with hardware that doesn't really support 1-wire operations,
	145	* like a parallel/serial port.
	146	* Either define read_bit and write_bit OR define, at minimum, touch_bit and
	147	* reset_bus.
b3be177a	148	*
6b729861	149	*/
1da177e4 LT	150	struct w1_bus_master
1da177e4 LT	151	{
ccd69940	152	void *data;
6b729861	153
ccd69940	154	u8 (read_bit)(void );
6b729861	155
ccd69940	156	void (write_bit)(void , u8);
6b729861	157
ccd69940	158	u8 (touch_bit)(void , u8);
6b729861	159
ccd69940	160	u8 (read_byte)(void );
6b729861	161
ccd69940	162	void (write_byte)(void , u8);
6b729861	163
ccd69940	164	u8 (read_block)(void , u8 *, int);
6b729861	165
ccd69940	166	void (write_block)(void , const u8 *, int);
6b729861	167
ccd69940	168	u8 (triplet)(void , u8);
6b729861	169
ccd69940	170	u8 (reset_bus)(void );
6b729861	171
6a158c0d DF	172	u8 (set_pullup)(void , int);
6a158c0d DF	173
c30c9b15 DF	174	void (search)(void , struct w1_master *,
c30c9b15 DF	175	u8, w1_slave_found_callback);
1da177e4 LT	176	};
1da177e4 LT	177
42105698 DF	178	/**
	179	* enum w1_master_flags - bitfields used in w1_master.flags
	180	* @W1_ABORT_SEARCH: abort searching early on shutdown
a1613056	181	* @W1_WARN_MAX_COUNT: limit warning when the maximum count is reached
42105698 DF	182	*/
	183	enum w1_master_flags {
	184	W1_ABORT_SEARCH = 0,
a1613056	185	W1_WARN_MAX_COUNT = 1,
42105698 DF	186	};
42105698 DF	187
b3be177a DF	188	/**
	189	* struct w1_master - one per bus master
	190	* @w1_master_entry: master linked list
	191	* @owner: module owner
	192	* @name: dynamically allocate bus name
	193	* @list_mutex: protect slist and async_list
	194	* @slist: linked list of slaves
	195	* @async_list: linked list of netlink commands to execute
	196	* @max_slave_count: maximum number of slaves to search for at a time
	197	* @slave_count: current number of slaves known
	198	* @attempts: number of searches ran
	199	* @slave_ttl: number of searches before a slave is timed out
	200	* @initialized: prevent init/removal race conditions
	201	* @id: w1 bus number
	202	* @search_count: number of automatic searches to run, -1 unlimited
	203	* @search_id: allows continuing a search
	204	* @refcnt: reference count
	205	* @priv: private data storage
b3be177a DF	206	* @enable_pullup: allows a strong pullup
	207	* @pullup_duration: time for the next strong pullup
	208	* @flags: one of w1_master_flags
	209	* @thread: thread for bus search and netlink commands
	210	* @mutex: protect most of w1_master
	211	* @bus_mutex: pretect concurrent bus access
	212	* @driver: sysfs driver
	213	* @dev: sysfs device
	214	* @bus_master: io operations available
	215	* @seq: sequence number used for netlink broadcasts
b3be177a	216	*/
1da177e4 LT	217	struct w1_master
	218	{
	219	struct list_head w1_master_entry;
	220	struct module *owner;
	221	unsigned char name[W1_MAXNAMELEN];
9fcbbac5 DF	222	/* list_mutex protects just slist and async_list so slaves can be
	223	* searched for and async commands added while the master has
	224	* w1_master.mutex locked and is operating on the bus.
b3be177a	225	* lock order w1_mlock, w1_master.mutex, w1_master.list_mutex
9fcbbac5 DF	226	*/
9fcbbac5 DF	227	struct mutex list_mutex;
1da177e4	228	struct list_head slist;
9fcbbac5	229	struct list_head async_list;
1da177e4 LT	230	int max_slave_count, slave_count;
	231	unsigned long attempts;
	232	int slave_ttl;
	233	int initialized;
	234	u32 id;
2a9d0c17	235	int search_count;
3c6955e5 DF	236	/* id to start searching on, to continue a search or 0 to restart */
3c6955e5 DF	237	u64 search_id;
1da177e4 LT	238
	239	atomic_t refcnt;
	240
	241	void *priv;
1da177e4	242
6a158c0d DF	243	/** 5V strong pullup enabled flag, 1 enabled, zero disabled. */
	244	int enable_pullup;
	245	/** 5V strong pullup duration in milliseconds, zero disabled. */
	246	int pullup_duration;
	247
42105698 DF	248	long flags;
42105698 DF	249
674a396c	250	struct task_struct *thread;
abd52a13	251	struct mutex mutex;
b02f8bed	252	struct mutex bus_mutex;
1da177e4 LT	253
1da177e4 LT	254	struct device_driver *driver;
7785925d	255	struct device dev;
1da177e4 LT	256
	257	struct w1_bus_master *bus_master;
	258
12003375	259	u32 seq;
1da177e4 LT	260	};
1da177e4 LT	261
9fcbbac5 DF	262	/**
	263	* struct w1_async_cmd - execute callback from the w1_process kthread
	264	* @async_entry: link entry
	265	* @cb: callback function, must list_del and destroy this list before
	266	* returning
	267	*
	268	* When inserted into the w1_master async_list, w1_process will execute
	269	* the callback. Embed this into the structure with the command details.
	270	*/
	271	struct w1_async_cmd {
	272	struct list_head async_entry;
	273	void (cb)(struct w1_master dev, struct w1_async_cmd *async_cmd);
	274	};
	275
1da177e4	276	int w1_create_master_attributes(struct w1_master *);
c30c9b15	277	void w1_destroy_master_attributes(struct w1_master *master);
12003375 EP	278	void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb);
12003375 EP	279	void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb);
9fcbbac5	280	/* call w1_unref_slave to release the reference counts w1_search_slave added */
12003375	281	struct w1_slave w1_search_slave(struct w1_reg_num id);
9fcbbac5 DF	282	/* decrements the reference on sl->master and sl, and cleans up if zero
	283	* returns the reference count after it has been decremented */
	284	int w1_unref_slave(struct w1_slave *sl);
963bb101 DF	285	void w1_slave_found(struct w1_master *dev, u64 rn);
	286	void w1_search_process_cb(struct w1_master *dev, u8 search_type,
	287	w1_slave_found_callback cb);
70b34d2e DF	288	struct w1_slave w1_slave_search_device(struct w1_master dev,
70b34d2e DF	289	struct w1_reg_num *rn);
12003375 EP	290	struct w1_master *w1_search_master_id(u32 id);
12003375 EP	291
c30c9b15 DF	292	/* Disconnect and reconnect devices in the given family. Used for finding
	293	* unclaimed devices after a family has been registered or releasing devices
	294	* after a family has been unregistered. Set attach to 1 when a new family
	295	* has just been registered, to 0 when it has been unregistered.
	296	*/
	297	void w1_reconnect_slaves(struct w1_family *f, int attach);
70b34d2e	298	int w1_attach_slave_device(struct w1_master dev, struct w1_reg_num rn);
9fcbbac5 DF	299	/* 0 success, otherwise EBUSY */
9fcbbac5 DF	300	int w1_slave_detach(struct w1_slave *sl);
c30c9b15	301
12003375 EP	302	u8 w1_triplet(struct w1_master *dev, int bdir);
12003375 EP	303	void w1_write_8(struct w1_master *, u8);
34e453d4	304	u8 w1_read_8(struct w1_master *);
12003375 EP	305	int w1_reset_bus(struct w1_master *);
	306	u8 w1_calc_crc8(u8 *, int);
	307	void w1_write_block(struct w1_master , const u8 , int);
9be62e0b	308	void w1_touch_block(struct w1_master , u8 , int);
12003375 EP	309	u8 w1_read_block(struct w1_master , u8 , int);
12003375 EP	310	int w1_reset_select_slave(struct w1_slave *sl);
67dfd54c	311	int w1_reset_resume_command(struct w1_master *);
6a158c0d	312	void w1_next_pullup(struct w1_master *, int);
1da177e4	313
db2d0008 EP	314	static inline struct w1_slave* dev_to_w1_slave(struct device *dev)
	315	{
	316	return container_of(dev, struct w1_slave, dev);
	317	}
	318
	319	static inline struct w1_slave* kobj_to_w1_slave(struct kobject *kobj)
	320	{
	321	return dev_to_w1_slave(container_of(kobj, struct device, kobj));
	322	}
	323
	324	static inline struct w1_master* dev_to_w1_master(struct device *dev)
	325	{
	326	return container_of(dev, struct w1_master, dev);
	327	}
	328
2c5bfdac	329	extern struct device_driver w1_master_driver;
2c5bfdac EP	330	extern struct device w1_master_device;
	331	extern int w1_max_slave_count;
	332	extern int w1_max_slave_ttl;
	333	extern struct list_head w1_masters;
	334	extern struct mutex w1_mlock;
	335
9fcbbac5	336	extern int w1_process_callbacks(struct w1_master *dev);
2c5bfdac EP	337	extern int w1_process(void *);
2c5bfdac EP	338
1da177e4 LT	339	#endif /* __KERNEL__ */
	340
	341	#endif /* __W1_H */