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i2c.h revision 1.6 
      1 /*	$NetBSD: i2c.h,v 1.6 2014/08/23 08:03:33 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_I2C_H_
     33 #define _LINUX_I2C_H_
     34 
     35 #include <sys/types.h>
     36 #include <sys/device_if.h>
     37 #include <sys/queue.h>		/* XXX include order botch: i2cvar.h needs */
     38 
     39 #include <dev/i2c/i2cvar.h>
     40 
     41 struct i2c_adapter;
     42 struct i2c_algorithm;
     43 struct i2c_msg;
     44 
     45 #define	I2C_NAME_SIZE	20
     46 
     47 #define	I2C_CLASS_DDC	0x01
     48 
     49 struct i2c_board_info {
     50 	char			type[I2C_NAME_SIZE];
     51 	uint16_t		addr;
     52 	void			*platform_data;
     53 };
     54 
     55 #define	I2C_BOARD_INFO(board_type, board_addr)		\
     56 	.type = (board_type),				\
     57 	.addr = (board_addr)
     58 
     59 static inline void
     60 i2c_new_device(const struct i2c_adapter *adapter __unused,
     61     const struct i2c_board_info *board __unused)
     62 {
     63 }
     64 
     65 struct i2c_driver {
     66 };
     67 
     68 struct module;
     69 static inline int
     70 i2c_register_driver(const struct module *owner __unused,
     71     const struct i2c_driver *driver __unused)
     72 {
     73 	return 0;
     74 }
     75 
     76 static inline void
     77 i2c_del_driver(const struct i2c_driver *driver __unused)
     78 {
     79 }
     80 
     81 struct i2c_client;
     82 
     83 struct i2c_adapter {
     84 	char		 		name[I2C_NAME_SIZE];
     85 	const struct i2c_algorithm	*algo;
     86 	void				*algo_data;
     87 	int				retries;
     88 	struct module			*owner;
     89 	unsigned int			class;
     90 	struct {
     91 		device_t	parent;
     92 	}				dev;	/* XXX Kludge for intel_dp.  */
     93 	void				*i2ca_adapdata;
     94 };
     95 
     96 static inline int
     97 i2c_add_adapter(struct i2c_adapter *adapter __unused)
     98 {
     99 	return 0;
    100 }
    101 
    102 static inline void
    103 i2c_del_adapter(struct i2c_adapter *adapter __unused)
    104 {
    105 }
    106 
    107 static inline void *
    108 i2c_get_adapdata(const struct i2c_adapter *adapter)
    109 {
    110 
    111 	return adapter->i2ca_adapdata;
    112 }
    113 
    114 static inline void
    115 i2c_set_adapdata(struct i2c_adapter *adapter, void *data)
    116 {
    117 
    118 	adapter->i2ca_adapdata = data;
    119 }
    120 
    121 struct i2c_msg {
    122 	i2c_addr_t	addr;
    123 	uint16_t	flags;
    124 	uint16_t	len;
    125 	uint8_t		*buf;
    126 };
    127 
    128 #define	I2C_M_RD		0x01
    129 #define	I2C_M_NOSTART		0x02
    130 
    131 #define	I2C_FUNC_I2C			0x01
    132 #define	I2C_FUNC_NOSTART		0x02
    133 #define	I2C_FUNC_SMBUS_EMUL		0x04
    134 #define	I2C_FUNC_SMBUS_READ_BLOCK_DATA	0x08
    135 #define	I2C_FUNC_SMBUS_BLOCK_PROC_CALL	0x10
    136 #define	I2C_FUNC_10BIT_ADDR		0x20
    137 
    138 struct i2c_algorithm {
    139 	int		(*master_xfer)(struct i2c_adapter *, struct i2c_msg *,
    140 			    int);
    141 	uint32_t	(*functionality)(struct i2c_adapter *);
    142 };
    143 
    144 /* XXX Make the nm output a little more greppable...  */
    145 #define	i2c_transfer	linux_i2c_transfer
    146 
    147 int	i2c_transfer(struct i2c_adapter *, struct i2c_msg *, int);
    148 
    149 #endif  /* _LINUX_I2C_H_ */
    150