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phoenix |
/* ------------------------------------------------------------------------- */
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/* */
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/* i2c.h - definitions for the i2c-bus interface */
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/* */
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/* ------------------------------------------------------------------------- */
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/* Copyright (C) 1995-2000 Simon G. Vogl
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* ------------------------------------------------------------------------- */
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/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
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Frodo Looijaard <frodol@dds.nl> */
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/* $Id: i2c.h,v 1.1.1.1 2004-04-15 02:35:16 phoenix Exp $ */
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#ifndef I2C_H
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#define I2C_H
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#define I2C_DATE "20010830"
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#define I2C_VERSION "2.6.1"
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#include <linux/i2c-id.h> /* id values of adapters et. al. */
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#include <linux/types.h>
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struct i2c_msg;
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#ifdef __KERNEL__
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/* --- Includes and compatibility declarations ------------------------ */
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#include <asm/semaphore.h>
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#include <linux/config.h>
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/* --- General options ------------------------------------------------ */
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#define I2C_ALGO_MAX 4 /* control memory consumption */
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#define I2C_ADAP_MAX 16
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#define I2C_DRIVER_MAX 16
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#define I2C_CLIENT_MAX 32
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#define I2C_DUMMY_MAX 4
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struct i2c_algorithm;
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struct i2c_adapter;
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struct i2c_client;
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struct i2c_driver;
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struct i2c_client_address_data;
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union i2c_smbus_data;
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/*
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* The master routines are the ones normally used to transmit data to devices
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* on a bus (or read from them). Apart from two basic transfer functions to
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* transmit one message at a time, a more complex version can be used to
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* transmit an arbitrary number of messages without interruption.
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*/
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extern int i2c_master_send(struct i2c_client *,const char* ,int);
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extern int i2c_master_recv(struct i2c_client *,char* ,int);
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/* Transfer num messages.
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*/
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extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
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/*
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* Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
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* This is not tested/implemented yet and will change in the future.
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*/
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extern int i2c_slave_send(struct i2c_client *,char*,int);
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extern int i2c_slave_recv(struct i2c_client *,char*,int);
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/* This is the very generalized SMBus access routine. You probably do not
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want to use this, though; one of the functions below may be much easier,
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and probably just as fast.
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Note that we use i2c_adapter here, because you do not need a specific
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smbus adapter to call this function. */
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extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
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unsigned short flags,
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char read_write, u8 command, int size,
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union i2c_smbus_data * data);
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/* Now follow the 'nice' access routines. These also document the calling
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conventions of smbus_access. */
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extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
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extern s32 i2c_smbus_read_byte(struct i2c_client * client);
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extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
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extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
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extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
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u8 command, u8 value);
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extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
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extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
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u8 command, u16 value);
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extern s32 i2c_smbus_process_call(struct i2c_client * client,
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u8 command, u16 value);
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/* Returns the number of read bytes */
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extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
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u8 command, u8 *values);
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extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
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u8 command, u8 length,
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u8 *values);
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extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
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u8 command, u8 length,
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u8 *values);
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/*
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* A driver is capable of handling one or more physical devices present on
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* I2C adapters. This information is used to inform the driver of adapter
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* events.
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*/
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struct i2c_driver {
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char name[32];
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int id;
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unsigned int flags; /* div., see below */
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/* Notifies the driver that a new bus has appeared. This routine
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* can be used by the driver to test if the bus meets its conditions
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* & seek for the presence of the chip(s) it supports. If found, it
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* registers the client(s) that are on the bus to the i2c admin. via
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* i2c_attach_client.
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*/
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int (*attach_adapter)(struct i2c_adapter *);
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/* tells the driver that a client is about to be deleted & gives it
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* the chance to remove its private data. Also, if the client struct
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* has been dynamically allocated by the driver in the function above,
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* it must be freed here.
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*/
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int (*detach_client)(struct i2c_client *);
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/* a ioctl like command that can be used to perform specific functions
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* with the device.
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*/
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int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
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/* These two are mainly used for bookkeeping & dynamic unloading of
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* kernel modules. inc_use tells the driver that a client is being
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* used by another module & that it should increase its ref. counter.
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* dec_use is the inverse operation.
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* NB: Make sure you have no circular dependencies, or else you get a
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* deadlock when trying to unload the modules.
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* You should use the i2c_{inc,dec}_use_client functions instead of
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* calling this function directly.
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*/
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void (*inc_use)(struct i2c_client *client);
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void (*dec_use)(struct i2c_client *client);
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};
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/*
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* i2c_client identifies a single device (i.e. chip) that is connected to an
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* i2c bus. The behaviour is defined by the routines of the driver. This
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* function is mainly used for lookup & other admin. functions.
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*/
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struct i2c_client {
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char name[32];
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int id;
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unsigned int flags; /* div., see below */
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unsigned int addr; /* chip address - NOTE: 7bit */
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/* addresses are stored in the */
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/* _LOWER_ 7 bits of this char */
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/* addr: unsigned int to make lm_sensors i2c-isa adapter work
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more cleanly. It does not take any more memory space, due to
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alignment considerations */
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struct i2c_adapter *adapter; /* the adapter we sit on */
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struct i2c_driver *driver; /* and our access routines */
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void *data; /* for the clients */
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int usage_count; /* How many accesses currently */
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/* to the client */
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};
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/*
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* The following structs are for those who like to implement new bus drivers:
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* i2c_algorithm is the interface to a class of hardware solutions which can
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* be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
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* to name two of the most common.
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*/
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struct i2c_algorithm {
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char name[32]; /* textual description */
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unsigned int id;
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/* If an adapter algorithm can't to I2C-level access, set master_xfer
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to NULL. If an adapter algorithm can do SMBus access, set
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smbus_xfer. If set to NULL, the SMBus protocol is simulated
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using common I2C messages */
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int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg msgs[],
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int num);
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int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
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unsigned short flags, char read_write,
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u8 command, int size, union i2c_smbus_data * data);
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/* --- these optional/future use for some adapter types.*/
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int (*slave_send)(struct i2c_adapter *,char*,int);
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int (*slave_recv)(struct i2c_adapter *,char*,int);
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/* --- ioctl like call to set div. parameters. */
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int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
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/* To determine what the adapter supports */
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u32 (*functionality) (struct i2c_adapter *);
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};
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/*
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* i2c_adapter is the structure used to identify a physical i2c bus along
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* with the access algorithms necessary to access it.
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*/
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struct i2c_adapter {
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char name[32]; /* some useful name to identify the adapter */
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unsigned int id;/* == is algo->id | hwdep.struct->id, */
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/* for registered values see below */
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struct i2c_algorithm *algo;/* the algorithm to access the bus */
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void *algo_data;
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/* --- These may be NULL, but should increase the module use count */
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void (*inc_use)(struct i2c_adapter *);
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void (*dec_use)(struct i2c_adapter *);
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/* --- administration stuff. */
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int (*client_register)(struct i2c_client *);
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int (*client_unregister)(struct i2c_client *);
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void *data; /* private data for the adapter */
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/* some data fields that are used by all types */
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/* these data fields are readonly to the public */
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/* and can be set via the i2c_ioctl call */
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/* data fields that are valid for all devices */
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struct semaphore lock;
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unsigned int flags;/* flags specifying div. data */
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struct i2c_client *clients[I2C_CLIENT_MAX];
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int client_count;
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int timeout;
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int retries;
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#ifdef CONFIG_PROC_FS
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/* No need to set this when you initialize the adapter */
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int inode;
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#endif /* def CONFIG_PROC_FS */
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};
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/*flags for the driver struct: */
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#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
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#define I2C_DF_DUMMY 0x02 /* do not connect any clients */
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/*flags for the client struct: */
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#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
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#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
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/* on an i2c_client */
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/* i2c_client_address_data is the struct for holding default client
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* addresses for a driver and for the parameters supplied on the
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* command line
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*/
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struct i2c_client_address_data {
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unsigned short *normal_i2c;
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unsigned short *normal_i2c_range;
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unsigned short *probe;
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unsigned short *probe_range;
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unsigned short *ignore;
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unsigned short *ignore_range;
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unsigned short *force;
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};
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/* Internal numbers to terminate lists */
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#define I2C_CLIENT_END 0xfffe
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/* The numbers to use to set I2C bus address */
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#define ANY_I2C_BUS 0xffff
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/* The length of the option lists */
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#define I2C_CLIENT_MAX_OPTS 48
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/* ----- functions exported by i2c.o */
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/* administration...
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*/
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extern int i2c_add_adapter(struct i2c_adapter *);
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extern int i2c_del_adapter(struct i2c_adapter *);
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extern int i2c_add_driver(struct i2c_driver *);
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extern int i2c_del_driver(struct i2c_driver *);
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extern int i2c_attach_client(struct i2c_client *);
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extern int i2c_detach_client(struct i2c_client *);
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/* Only call these if you grab a resource that makes unloading the
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client and the adapter it is on completely impossible. Like when a
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/proc directory is entered. */
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extern void i2c_inc_use_client(struct i2c_client *);
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extern void i2c_dec_use_client(struct i2c_client *);
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/* New function: This is to get an i2c_client-struct for controlling the
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client either by using i2c_control-function or having the
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client-module export functions that can be used with the i2c_client
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-struct. */
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extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
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struct i2c_client *prev);
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/* Should be used with new function
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extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
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to make sure that client-struct is valid and that it is okay to access
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the i2c-client.
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returns -EACCES if client doesn't allow use (default)
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returns -EBUSY if client doesn't allow multiple use (default) and
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usage_count >0 */
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extern int i2c_use_client(struct i2c_client *);
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extern int i2c_release_client(struct i2c_client *);
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/* returns -EBUSY if address has been taken, 0 if not. Note that the only
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other place at which this is called is within i2c_attach_client; so
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you can cheat by simply not registering. Not recommended, of course! */
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extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
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332 |
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/* Detect function. It iterates over all possible addresses itself.
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* It will only call found_proc if some client is connected at the
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* specific address (unless a 'force' matched);
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*/
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337 |
|
|
typedef int i2c_client_found_addr_proc (struct i2c_adapter *adapter,
|
338 |
|
|
int addr, unsigned short flags,int kind);
|
339 |
|
|
|
340 |
|
|
extern int i2c_probe(struct i2c_adapter *adapter,
|
341 |
|
|
struct i2c_client_address_data *address_data,
|
342 |
|
|
i2c_client_found_addr_proc *found_proc);
|
343 |
|
|
|
344 |
|
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/* An ioctl like call to set div. parameters of the adapter.
|
345 |
|
|
*/
|
346 |
|
|
extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
|
347 |
|
|
|
348 |
|
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/* This call returns a unique low identifier for each registered adapter,
|
349 |
|
|
* or -1 if the adapter was not registered.
|
350 |
|
|
*/
|
351 |
|
|
extern int i2c_adapter_id(struct i2c_adapter *adap);
|
352 |
|
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|
353 |
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|
354 |
|
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|
355 |
|
|
/* Return the functionality mask */
|
356 |
|
|
extern u32 i2c_get_functionality (struct i2c_adapter *adap);
|
357 |
|
|
|
358 |
|
|
/* Return 1 if adapter supports everything we need, 0 if not. */
|
359 |
|
|
extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);
|
360 |
|
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|
361 |
|
|
#endif /* __KERNEL__ */
|
362 |
|
|
|
363 |
|
|
/*
|
364 |
|
|
* I2C Message - used for pure i2c transaction, also from /dev interface
|
365 |
|
|
*/
|
366 |
|
|
struct i2c_msg {
|
367 |
|
|
__u16 addr; /* slave address */
|
368 |
|
|
__u16 flags;
|
369 |
|
|
#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
|
370 |
|
|
#define I2C_M_RD 0x01
|
371 |
|
|
#define I2C_M_NOSTART 0x4000
|
372 |
|
|
#define I2C_M_REV_DIR_ADDR 0x2000
|
373 |
|
|
__u16 len; /* msg length */
|
374 |
|
|
__u8 *buf; /* pointer to msg data */
|
375 |
|
|
};
|
376 |
|
|
|
377 |
|
|
/* To determine what functionality is present */
|
378 |
|
|
|
379 |
|
|
#define I2C_FUNC_I2C 0x00000001
|
380 |
|
|
#define I2C_FUNC_10BIT_ADDR 0x00000002
|
381 |
|
|
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART} */
|
382 |
|
|
#define I2C_FUNC_SMBUS_QUICK 0x00010000
|
383 |
|
|
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
|
384 |
|
|
#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
|
385 |
|
|
#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
|
386 |
|
|
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
|
387 |
|
|
#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
|
388 |
|
|
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
|
389 |
|
|
#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
|
390 |
|
|
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
|
391 |
|
|
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
|
392 |
|
|
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* New I2C-like block */
|
393 |
|
|
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* transfer */
|
394 |
|
|
|
395 |
|
|
#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
|
396 |
|
|
I2C_FUNC_SMBUS_WRITE_BYTE
|
397 |
|
|
#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
|
398 |
|
|
I2C_FUNC_SMBUS_WRITE_BYTE_DATA
|
399 |
|
|
#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
|
400 |
|
|
I2C_FUNC_SMBUS_WRITE_WORD_DATA
|
401 |
|
|
#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
|
402 |
|
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
|
403 |
|
|
#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
|
404 |
|
|
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
|
405 |
|
|
|
406 |
|
|
#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
|
407 |
|
|
I2C_FUNC_SMBUS_BYTE | \
|
408 |
|
|
I2C_FUNC_SMBUS_BYTE_DATA | \
|
409 |
|
|
I2C_FUNC_SMBUS_WORD_DATA | \
|
410 |
|
|
I2C_FUNC_SMBUS_PROC_CALL | \
|
411 |
|
|
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
|
412 |
|
|
|
413 |
|
|
/*
|
414 |
|
|
* Data for SMBus Messages
|
415 |
|
|
*/
|
416 |
|
|
#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
|
417 |
|
|
#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
|
418 |
|
|
union i2c_smbus_data {
|
419 |
|
|
__u8 byte;
|
420 |
|
|
__u16 word;
|
421 |
|
|
__u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
|
422 |
|
|
/* one more for read length in block process call */
|
423 |
|
|
};
|
424 |
|
|
|
425 |
|
|
/* smbus_access read or write markers */
|
426 |
|
|
#define I2C_SMBUS_READ 1
|
427 |
|
|
#define I2C_SMBUS_WRITE 0
|
428 |
|
|
|
429 |
|
|
/* SMBus transaction types (size parameter in the above functions)
|
430 |
|
|
Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
|
431 |
|
|
#define I2C_SMBUS_QUICK 0
|
432 |
|
|
#define I2C_SMBUS_BYTE 1
|
433 |
|
|
#define I2C_SMBUS_BYTE_DATA 2
|
434 |
|
|
#define I2C_SMBUS_WORD_DATA 3
|
435 |
|
|
#define I2C_SMBUS_PROC_CALL 4
|
436 |
|
|
#define I2C_SMBUS_BLOCK_DATA 5
|
437 |
|
|
#define I2C_SMBUS_I2C_BLOCK_DATA 6
|
438 |
|
|
|
439 |
|
|
|
440 |
|
|
/* ----- commands for the ioctl like i2c_command call:
|
441 |
|
|
* note that additional calls are defined in the algorithm and hw
|
442 |
|
|
* dependent layers - these can be listed here, or see the
|
443 |
|
|
* corresponding header files.
|
444 |
|
|
*/
|
445 |
|
|
/* -> bit-adapter specific ioctls */
|
446 |
|
|
#define I2C_RETRIES 0x0701 /* number of times a device address */
|
447 |
|
|
/* should be polled when not */
|
448 |
|
|
/* acknowledging */
|
449 |
|
|
#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
|
450 |
|
|
|
451 |
|
|
|
452 |
|
|
/* this is for i2c-dev.c */
|
453 |
|
|
#define I2C_SLAVE 0x0703 /* Change slave address */
|
454 |
|
|
/* Attn.: Slave address is 7 or 10 bits */
|
455 |
|
|
#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
|
456 |
|
|
/* Attn.: Slave address is 7 or 10 bits */
|
457 |
|
|
/* This changes the address, even if it */
|
458 |
|
|
/* is already taken! */
|
459 |
|
|
#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
|
460 |
|
|
|
461 |
|
|
#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
|
462 |
|
|
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
|
463 |
|
|
#if 0
|
464 |
|
|
#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
|
465 |
|
|
#endif
|
466 |
|
|
|
467 |
|
|
#define I2C_SMBUS 0x0720 /* SMBus-level access */
|
468 |
|
|
|
469 |
|
|
/* ... algo-bit.c recognizes */
|
470 |
|
|
#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
|
471 |
|
|
/* written byte (except address) */
|
472 |
|
|
#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
|
473 |
|
|
|
474 |
|
|
/* ----- I2C-DEV: char device interface stuff ------------------------- */
|
475 |
|
|
|
476 |
|
|
#define I2C_MAJOR 89 /* Device major number */
|
477 |
|
|
|
478 |
|
|
#ifdef __KERNEL__
|
479 |
|
|
|
480 |
|
|
# ifndef NULL
|
481 |
|
|
# define NULL ( (void *) 0 )
|
482 |
|
|
# endif
|
483 |
|
|
|
484 |
|
|
# ifndef ENODEV
|
485 |
|
|
# include <asm/errno.h>
|
486 |
|
|
# endif
|
487 |
|
|
|
488 |
|
|
/* These defines are used for probing i2c client addresses */
|
489 |
|
|
/* Default fill of many variables */
|
490 |
|
|
#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
491 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
492 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
493 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
494 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
495 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
496 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
497 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
498 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
499 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
500 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
501 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
502 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
503 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
504 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
|
505 |
|
|
I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
|
506 |
|
|
|
507 |
|
|
/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
|
508 |
|
|
stringified */
|
509 |
|
|
#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
|
510 |
|
|
#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
|
511 |
|
|
#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
|
512 |
|
|
|
513 |
|
|
/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
|
514 |
|
|
module header */
|
515 |
|
|
|
516 |
|
|
#define I2C_CLIENT_MODULE_PARM(var,desc) \
|
517 |
|
|
static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
|
518 |
|
|
MODULE_PARM(var,I2C_CLIENT_MODPARM); \
|
519 |
|
|
MODULE_PARM_DESC(var,desc)
|
520 |
|
|
|
521 |
|
|
/* This is the one you want to use in your own modules */
|
522 |
|
|
#define I2C_CLIENT_INSMOD \
|
523 |
|
|
I2C_CLIENT_MODULE_PARM(probe, \
|
524 |
|
|
"List of adapter,address pairs to scan additionally"); \
|
525 |
|
|
I2C_CLIENT_MODULE_PARM(probe_range, \
|
526 |
|
|
"List of adapter,start-addr,end-addr triples to scan " \
|
527 |
|
|
"additionally"); \
|
528 |
|
|
I2C_CLIENT_MODULE_PARM(ignore, \
|
529 |
|
|
"List of adapter,address pairs not to scan"); \
|
530 |
|
|
I2C_CLIENT_MODULE_PARM(ignore_range, \
|
531 |
|
|
"List of adapter,start-addr,end-addr triples not to " \
|
532 |
|
|
"scan"); \
|
533 |
|
|
I2C_CLIENT_MODULE_PARM(force, \
|
534 |
|
|
"List of adapter,address pairs to boldly assume " \
|
535 |
|
|
"to be present"); \
|
536 |
|
|
static struct i2c_client_address_data addr_data = \
|
537 |
|
|
{normal_i2c, normal_i2c_range, \
|
538 |
|
|
probe, probe_range, \
|
539 |
|
|
ignore, ignore_range, \
|
540 |
|
|
force}
|
541 |
|
|
|
542 |
|
|
/* Detect whether we are on the isa bus. If this returns true, all i2c
|
543 |
|
|
access will fail! */
|
544 |
|
|
#define i2c_is_isa_client(clientptr) \
|
545 |
|
|
((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
|
546 |
|
|
#define i2c_is_isa_adapter(adapptr) \
|
547 |
|
|
((adapptr)->algo->id == I2C_ALGO_ISA)
|
548 |
|
|
|
549 |
|
|
#endif /* def __KERNEL__ */
|
550 |
|
|
#endif /* I2C_H */
|