/* *	w1.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> * * * 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_Hstruct 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_SLAVE_DATA_SIZE	128#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_SLAVE_ACTIVE		0struct 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;	u8			rom[9];	u32			flags;	int			ttl;	struct w1_master	*master;	struct w1_family	*family;	void			*family_data;	struct device		dev;	struct completion	released;};typedef void (* w1_slave_found_callback)(void *, u64);/** * 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{	/** the first parameter in all the functions below */	void		*data;	/**	 * Sample the line level	 * @return the level read (0 or 1)	 */	u8		(*read_bit)(void *);	/** Sets the line level */	void		(*write_bit)(void *, u8);	/**	 * touch_bit is 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)	 */	u8		(*touch_bit)(void *, u8);	/**	 * Reads a bytes. Same as 8 touch_bit(1) calls.	 * @return the byte read	 */	u8		(*read_byte)(void *);	/**	 * Writes a byte. Same as 8 touch_bit(x) calls.	 */	void		(*write_byte)(void *, u8);	/**	 * Same as a series of read_byte() calls	 * @return the number of bytes read	 */	u8		(*read_block)(void *, u8 *, int);	/** Same as a series of write_byte() calls */	void		(*write_block)(void *, const u8 *, int);	/**	 * Combines two reads and a smart write for ROM searches	 * @return bit0=Id bit1=comp_id bit2=dir_taken	 */	u8		(*triplet)(void *, u8);	/**	 * long write-0 with a read for the presence pulse detection	 * @return -1=Error, 0=Device present, 1=No device present	 */	u8		(*reset_bus)(void *);	/** Really nice hardware can handles the different types of ROM search */	void		(*search)(void *, u8, w1_slave_found_callback);};#define W1_MASTER_NEED_EXIT		0#define W1_MASTER_NEED_RECONNECT	1struct w1_master{	struct list_head	w1_master_entry;	struct module		*owner;	unsigned char		name[W1_MAXNAMELEN];	struct list_head	slist;	int			max_slave_count, slave_count;	unsigned long		attempts;	int			slave_ttl;	int			initialized;	u32			id;	int			search_count;	atomic_t		refcnt;	void			*priv;	int			priv_size;	long			flags;	struct task_struct	*thread;	struct mutex		mutex;	struct device_driver	*driver;	struct device		dev;	struct w1_bus_master	*bus_master;	u32			seq;};int w1_create_master_attributes(struct w1_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);struct w1_slave *w1_search_slave(struct w1_reg_num *id);void w1_search_process(struct w1_master *dev, u8 search_type);struct w1_master *w1_search_master_id(u32 id);u8 w1_triplet(struct w1_master *dev, int bdir);void w1_write_8(struct w1_master *, u8);int w1_reset_bus(struct w1_master *);u8 w1_calc_crc8(u8 *, int);void w1_write_block(struct w1_master *, const u8 *, int);u8 w1_read_block(struct w1_master *, u8 *, int);int w1_reset_select_slave(struct w1_slave *sl);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(void *);#endif /* __KERNEL__ */#endif /* __W1_H */