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i2c.h revision 1.5 
      1 /*	$NetBSD: i2c.h,v 1.5 2014/08/06 15:01:33 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 static inline void
     56 i2c_new_device(const struct i2c_adapter *adapter __unused,
     57     const struct i2c_board_info *board __unused)
     58 {
     59 }
     60 
     61 struct i2c_driver {
     62 };
     63 
     64 struct module;
     65 static inline int
     66 i2c_register_driver(const struct module *owner __unused,
     67     const struct i2c_driver *driver __unused)
     68 {
     69 	return 0;
     70 }
     71 
     72 static inline void
     73 i2c_del_driver(const struct i2c_driver *driver __unused)
     74 {
     75 }
     76 
     77 struct i2c_client;
     78 
     79 struct i2c_adapter {
     80 	char		 		name[I2C_NAME_SIZE];
     81 	const struct i2c_algorithm	*algo;
     82 	void				*algo_data;
     83 	int				retries;
     84 	struct module			*owner;
     85 	unsigned int			class;
     86 	struct {
     87 		device_t	parent;
     88 	}				dev;	/* XXX Kludge for intel_dp.  */
     89 	void				*i2ca_adapdata;
     90 };
     91 
     92 static inline int
     93 i2c_add_adapter(struct i2c_adapter *adapter __unused)
     94 {
     95 	return 0;
     96 }
     97 
     98 static inline void
     99 i2c_del_adapter(struct i2c_adapter *adapter __unused)
    100 {
    101 }
    102 
    103 static inline void *
    104 i2c_get_adapdata(const struct i2c_adapter *adapter)
    105 {
    106 
    107 	return adapter->i2ca_adapdata;
    108 }
    109 
    110 static inline void
    111 i2c_set_adapdata(struct i2c_adapter *adapter, void *data)
    112 {
    113 
    114 	adapter->i2ca_adapdata = data;
    115 }
    116 
    117 struct i2c_msg {
    118 	i2c_addr_t	addr;
    119 	uint16_t	flags;
    120 	uint16_t	len;
    121 	uint8_t		*buf;
    122 };
    123 
    124 #define	I2C_M_RD		0x01
    125 #define	I2C_M_NOSTART		0x02
    126 
    127 #define	I2C_FUNC_I2C			0x01
    128 #define	I2C_FUNC_NOSTART		0x02
    129 #define	I2C_FUNC_SMBUS_EMUL		0x04
    130 #define	I2C_FUNC_SMBUS_READ_BLOCK_DATA	0x08
    131 #define	I2C_FUNC_SMBUS_BLOCK_PROC_CALL	0x10
    132 #define	I2C_FUNC_10BIT_ADDR		0x20
    133 
    134 struct i2c_algorithm {
    135 	int		(*master_xfer)(struct i2c_adapter *, struct i2c_msg *,
    136 			    int);
    137 	uint32_t	(*functionality)(struct i2c_adapter *);
    138 };
    139 
    140 /* XXX Make the nm output a little more greppable...  */
    141 #define	i2c_transfer	linux_i2c_transfer
    142 
    143 int	i2c_transfer(struct i2c_adapter *, struct i2c_msg *, int);
    144 
    145 #endif  /* _LINUX_I2C_H_ */
    146