patch-2.3.34 linux/include/linux/i2c.h
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- Lines: 671
- Date:
Thu Dec 16 13:59:38 1999
- Orig file:
v2.3.33/linux/include/linux/i2c.h
- Orig date:
Tue Dec 14 01:27:24 1999
diff -u --recursive --new-file v2.3.33/linux/include/linux/i2c.h linux/include/linux/i2c.h
@@ -1,190 +1,514 @@
+/* ------------------------------------------------------------------------- */
+/* */
+/* i2c.h - definitions for the i2c-bus interface */
+/* */
+/* ------------------------------------------------------------------------- */
+/* Copyright (C) 1995-1999 Simon G. Vogl
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* ------------------------------------------------------------------------- */
+/* $Revision: 1.30 $ $Date: 1999/11/16 08:12:38 $*/
+/* ------------------------------------------------------------------------- */
+
+/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
+ Frodo Looijaard <frodol@dds.nl> */
+
#ifndef I2C_H
#define I2C_H
-/*
- * linux i2c interface. Works a little bit like the scsi subsystem.
- * There are:
- *
- * i2c the basic control module (like scsi_mod)
- * bus driver a driver with a i2c bus (hostadapter driver)
- * chip driver a driver for a chip connected
- * to a i2c bus (cdrom/hd driver)
- *
- * A device will be attached to one bus and one chip driver. Every chip
- * driver gets a unique ID.
- *
- * A chip driver can provide a ioctl-like callback for the
- * communication with other parts of the kernel (not every i2c chip is
- * useful without other devices, a TV card tuner for example).
- *
- * "i2c internal" parts of the structs: only the i2c module is allowed to
- * write to them, for others they are read-only.
- *
- */
+#include <linux/i2c-id.h> /* id values of adapters et. al. */
-#include <linux/version.h>
+#ifdef __KERNEL__
-#define I2C_BUS_MAX 4 /* max # of bus drivers */
-#define I2C_DRIVER_MAX 8 /* max # of chip drivers */
-#define I2C_DEVICE_MAX 8 /* max # if devices per bus/driver */
+/* --- Includes and compatibility declarations ------------------------ */
-struct i2c_bus;
-struct i2c_driver;
-struct i2c_device;
+#include <linux/version.h>
+#ifndef KERNEL_VERSION
+#define KERNEL_VERSION(a,b,c) (((a) << 16) | ((b) << 8) | (c))
+#endif
-#define I2C_DRIVERID_MSP3400 1
-#define I2C_DRIVERID_TUNER 2
-#define I2C_DRIVERID_VIDEOTEXT 3
-#define I2C_DRIVERID_VIDEODECODER 4
-#define I2C_DRIVERID_VIDEOENCODER 5
-
-#define I2C_BUSID_BT848 1 /* I2C bus on a BT848 */
-#define I2C_BUSID_PARPORT 2 /* Bit banging on a parallel port */
-#define I2C_BUSID_BUZ 3
-#define I2C_BUSID_ZORAN 4
-#define I2C_BUSID_CYBER2000 5 /* I2C bus on a Cyber2000 */
-
-/*
- * struct for a driver for a i2c chip (tuner, soundprocessor,
- * videotext, ... ).
- *
- * a driver will register within the i2c module. The i2c module will
- * callback the driver (i2c_attach) for every device it finds on a i2c
- * bus at the specified address. If the driver decides to "accept"
- * the, device, it must return a struct i2c_device, and NULL
- * otherwise.
- *
- * i2c_detach = i2c_attach ** -1
- *
- * i2c_command will be used to pass commands to the driver in a
- * ioctl-line manner.
- *
- */
-
-struct i2c_driver
-{
- char name[32]; /* some useful label */
- int id; /* device type ID */
- unsigned char addr_l, addr_h; /* address range of the chip */
-
- int (*attach)(struct i2c_device *device);
- int (*detach)(struct i2c_device *device);
- int (*command)(struct i2c_device *device,unsigned int cmd, void *arg);
-
- /* i2c internal */
- struct i2c_device *devices[I2C_DEVICE_MAX];
- int devcount;
-};
-
-
-/*
- * this holds the informations about a i2c bus available in the system.
- *
- * a chip with a i2c bus interface (like bt848) registers the bus within
- * the i2c module. This struct provides functions to access the i2c bus.
- *
- * One must hold the spinlock to access the i2c bus (XXX: is the irqsave
- * required? Maybe better use a semaphore?).
- * [-AC-] having a spinlock_irqsave is only needed if we have drivers wishing
- * to bang their i2c bus from an interrupt.
- *
- * attach/detach_inform is a callback to inform the bus driver about
- * attached chip drivers.
- *
- */
-
-/* needed: unsigned long flags */
-
-#if LINUX_VERSION_CODE >= 0x020100
-# if 0
-# define LOCK_FLAGS unsigned long flags;
-# define LOCK_I2C_BUS(bus) spin_lock_irqsave(&(bus->bus_lock),flags);
-# define UNLOCK_I2C_BUS(bus) spin_unlock_irqrestore(&(bus->bus_lock),flags);
-# else
-# define LOCK_FLAGS
-# define LOCK_I2C_BUS(bus) spin_lock(&(bus->bus_lock));
-# define UNLOCK_I2C_BUS(bus) spin_unlock(&(bus->bus_lock));
-# endif
+#include <asm/page.h> /* for 2.2.xx */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,0,25)
+#include <linux/sched.h>
#else
-# define LOCK_FLAGS unsigned long flags;
-# define LOCK_I2C_BUS(bus) { save_flags(flags); cli(); }
-# define UNLOCK_I2C_BUS(bus) { restore_flags(flags); }
+#include <asm/semaphore.h>
#endif
+#include <linux/types.h>
+#include <linux/config.h>
+
+/* --- General options ------------------------------------------------ */
+
+#define I2C_ALGO_MAX 4 /* control memory consumption */
+#define I2C_ADAP_MAX 16
+#define I2C_DRIVER_MAX 16
+#define I2C_CLIENT_MAX 32
+#define I2C_DUMMY_MAX 4
+
+struct i2c_msg;
+struct i2c_algorithm;
+struct i2c_adapter;
+struct i2c_client;
+struct i2c_driver;
+struct i2c_client_address_data;
+union i2c_smbus_data;
+
+
+/*
+ * The master routines are the ones normally used to transmit data to devices
+ * on a bus (or read from them). Apart from two basic transfer functions to
+ * transmit one message at a time, a more complex version can be used to
+ * transmit an arbitrary number of messages without interruption.
+ */
+extern int i2c_master_send(struct i2c_client *,const char* ,int);
+extern int i2c_master_recv(struct i2c_client *,char* ,int);
+
+/* Transfer num messages.
+ */
+extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
+
+/*
+ * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
+ * This is not tested/implemented yet and will change in the future.
+ */
+extern int i2c_slave_send(struct i2c_client *,char*,int);
+extern int i2c_slave_recv(struct i2c_client *,char*,int);
-struct i2c_bus
-{
- char name[32]; /* some useful label */
- int id;
- void *data; /* free for use by the bus driver */
-#if LINUX_VERSION_CODE >= 0x020100
- spinlock_t bus_lock;
+/*
+ * I2C Message - could be used in the current interface to
+ */
+struct i2c_msg {
+ u16 addr; /* slave address */
+ unsigned short flags;
+#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
+#define I2C_M_RD 0x01
+#if 0
+#define I2C_M_PROBE 0x20
#endif
+ short len; /* msg length */
+ char *buf; /* pointer to msg data */
+};
+
- /* attach/detach inform callbacks */
- void (*attach_inform)(struct i2c_bus *bus, int id);
- void (*detach_inform)(struct i2c_bus *bus, int id);
+/* This is the very generalized SMBus access routine. You probably do not
+ want to use this, though; one of the functions below may be much easier,
+ and probably just as fast.
+ Note that we use i2c_adapter here, because you do not need a specific
+ smbus adapter to call this function. */
+extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
+ unsigned short flags,
+ char read_write, u8 command, int size,
+ union i2c_smbus_data * data);
+
+/* Now follow the 'nice' access routines. These also document the calling
+ conventions of smbus_access. */
+
+extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
+extern s32 i2c_smbus_read_byte(struct i2c_client * client);
+extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
+extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
+extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
+ u8 command, u8 value);
+extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
+extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
+ u8 command, u16 value);
+extern s32 i2c_smbus_process_call(struct i2c_client * client,
+ u8 command, u16 value);
+/* Returns the number of read bytes */
+extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
+ u8 command, u8 *values);
+extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
+ u8 command, u8 length,
+ u8 *values);
- /* Software I2C */
- void (*i2c_setlines)(struct i2c_bus *bus, int ctrl, int data);
- int (*i2c_getdataline)(struct i2c_bus *bus);
- /* Hardware I2C */
- int (*i2c_read)(struct i2c_bus *bus, unsigned char addr);
- int (*i2c_write)(struct i2c_bus *bus, unsigned char addr,
- unsigned char b1, unsigned char b2, int both);
+/*
+ * A driver is capable of handling one or more physical devices present on
+ * I2C adapters. This information is used to inform the driver of adapter
+ * events.
+ */
+
+struct i2c_driver {
+ char name[32];
+ int id;
+ unsigned int flags; /* div., see below */
+
+ /* Notifies the driver that a new bus has appeared. This routine
+ * can be used by the driver to test if the bus meets its conditions
+ * & seek for the presence of the chip(s) it supports. If found, it
+ * registers the client(s) that are on the bus to the i2c admin. via
+ * i2c_attach_client.
+ */
+ int (*attach_adapter)(struct i2c_adapter *);
+
+ /* tells the driver that a client is about to be deleted & gives it
+ * the chance to remove its private data. Also, if the client struct
+ * has been dynamically allocated by the driver in the function above,
+ * it must be freed here.
+ */
+ int (*detach_client)(struct i2c_client *);
+
+ /* a ioctl like command that can be used to perform specific functions
+ * with the device.
+ */
+ int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
+
+ /* These two are mainly used for bookkeeping & dynamic unloading of
+ * kernel modules. inc_use tells the driver that a client is being
+ * used by another module & that it should increase its ref. counter.
+ * dec_use is the inverse operation.
+ * NB: Make sure you have no circular dependencies, or else you get a
+ * deadlock when trying to unload the modules.
+ * You should use the i2c_{inc,dec}_use_client functions instead of
+ * calling this function directly.
+ */
+ void (*inc_use)(struct i2c_client *client);
+ void (*dec_use)(struct i2c_client *client);
+};
- /* internal data for i2c module */
- struct i2c_device *devices[I2C_DEVICE_MAX];
- int devcount;
+/*
+ * i2c_client identifies a single device (i.e. chip) that is connected to an
+ * i2c bus. The behaviour is defined by the routines of the driver. This
+ * function is mainly used for lookup & other admin. functions.
+ */
+struct i2c_client {
+ char name[32];
+ int id;
+ unsigned int flags; /* div., see below */
+ unsigned int addr; /* chip address - NOTE: 7bit */
+ /* addresses are stored in the */
+ /* _LOWER_ 7 bits of this char */
+ /* addr: unsigned int to make lm_sensors i2c-isa adapter work
+ more cleanly. It does not take any more memory space, due to
+ alignment considerations */
+ struct i2c_adapter *adapter; /* the adapter we sit on */
+ struct i2c_driver *driver; /* and our access routines */
+ void *data; /* for the clients */
};
/*
- * This holds per-device data for a i2c device
+ * The following structs are for those who like to implement new bus drivers:
+ * i2c_algorithm is the interface to a class of hardware solutions which can
+ * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
+ * to name two of the most common.
*/
+struct i2c_algorithm {
+ char name[32]; /* textual description */
+ unsigned int id;
+
+ /* If a adapter algorithm can't to I2C-level access, set master_xfer
+ to NULL. If an adapter algorithm can do SMBus access, set
+ smbus_xfer. If set to NULL, the SMBus protocol is simulated
+ using common I2C messages */
+ int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg msgs[],
+ int num);
+ int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
+ unsigned short flags, char read_write,
+ u8 command, int size, union i2c_smbus_data * data);
+
+ /* --- these optional/future use for some adapter types.*/
+ int (*slave_send)(struct i2c_adapter *,char*,int);
+ int (*slave_recv)(struct i2c_adapter *,char*,int);
+
+ /* --- ioctl like call to set div. parameters. */
+ int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
+
+ /* To determine what the adapter supports */
+ u32 (*functionality) (struct i2c_adapter *);
+};
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
+struct proc_dir_entry;
+#endif
-struct i2c_device
-{
- char name[32]; /* some useful label */
- void *data; /* free for use by the chip driver */
- unsigned char addr; /* chip addr */
+/*
+ * i2c_adapter is the structure used to identify a physical i2c bus along
+ * with the access algorithms necessary to access it.
+ */
+struct i2c_adapter {
+ char name[32]; /* some useful name to identify the adapter */
+ unsigned int id;/* == is algo->id | hwdep.struct->id, */
+ /* for registered values see below */
+ struct i2c_algorithm *algo;/* the algorithm to access the bus */
+ void *algo_data;
+
+ /* --- These may be NULL, but should increase the module use count */
+ void (*inc_use)(struct i2c_adapter *);
+ void (*dec_use)(struct i2c_adapter *);
+
+ /* --- administration stuff. */
+ int (*client_register)(struct i2c_client *);
+ int (*client_unregister)(struct i2c_client *);
+
+ void *data; /* private data for the adapter */
+ /* some data fields that are used by all types */
+ /* these data fields are readonly to the public */
+ /* and can be set via the i2c_ioctl call */
+
+ /* data fields that are valid for all devices */
+ struct semaphore lock;
+ unsigned int flags;/* flags specifying div. data */
+
+ struct i2c_client *clients[I2C_CLIENT_MAX];
+ int client_count;
+
+ int timeout;
+ int retries;
+
+#ifdef CONFIG_PROC_FS
+ /* No need to set this when you initialize the adapter */
+ int inode;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
+ struct proc_dir_entry *proc_entry;
+#endif
+#endif /* def CONFIG_PROC_FS */
+};
- /* i2c internal */
- struct i2c_bus *bus;
- struct i2c_driver *driver;
+/*flags for the driver struct: */
+#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
+#define I2C_DF_DUMMY 0x02 /* do not connect any clients */
+
+/* i2c_client_address_data is the struct for holding default client
+ * addresses for a driver and for the parameters supplied on the
+ * command line
+ */
+struct i2c_client_address_data {
+ unsigned short *normal_i2c;
+ unsigned short *normal_i2c_range;
+ unsigned short *probe;
+ unsigned short *probe_range;
+ unsigned short *ignore;
+ unsigned short *ignore_range;
+ unsigned short *force;
};
+/* Internal numbers to terminate lists */
+#define I2C_CLIENT_END 0xfffe
+
+/* The numbers to use to set I2C bus address */
+#define ANY_I2C_BUS 0xffff
+
+/* The length of the option lists */
+#define I2C_CLIENT_MAX_OPTS 48
+
+
+/* ----- functions exported by i2c.o */
+
+/* administration...
+ */
+extern int i2c_add_adapter(struct i2c_adapter *);
+extern int i2c_del_adapter(struct i2c_adapter *);
+
+extern int i2c_add_driver(struct i2c_driver *);
+extern int i2c_del_driver(struct i2c_driver *);
+
+extern int i2c_attach_client(struct i2c_client *);
+extern int i2c_detach_client(struct i2c_client *);
-/* ------------------------------------------------------------------- */
-/* i2c module functions */
+/* Only call these if you grab a resource that makes unloading the
+ client and the adapter it is on completely impossible. Like when a
+ /proc directory is entered. */
+extern void i2c_inc_use_client(struct i2c_client *);
+extern void i2c_dec_use_client(struct i2c_client *);
+
+
+/* Detect function. It itterates over all possible addresses itself.
+ * It will only call found_proc if some client is connected at the
+ * specific address (unless a 'force' matched);
+ */
+typedef int i2c_client_found_addr_proc (struct i2c_adapter *adapter,
+ int addr, unsigned short flags,int kind);
+
+extern int i2c_probe(struct i2c_adapter *adapter,
+ struct i2c_client_address_data *address_data,
+ i2c_client_found_addr_proc *found_proc);
+
+/* An ioctl like call to set div. parameters of the adapter.
+ */
+extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
+
+/* This call returns a unique low identifier for each registered adapter,
+ * or -1 if the adapter was not regisitered.
+ */
+extern int i2c_adapter_id(struct i2c_adapter *adap);
-/* register/unregister a i2c bus */
-int i2c_register_bus(struct i2c_bus *bus);
-int i2c_unregister_bus(struct i2c_bus *bus);
-/* register/unregister a chip driver */
-int i2c_register_driver(struct i2c_driver *driver);
-int i2c_unregister_driver(struct i2c_driver *driver);
-/* send a command to a chip using the ioctl-like callback interface */
-int i2c_control_device(struct i2c_bus *bus, int id,
- unsigned int cmd, void *arg);
+/* Return the functionality mask */
+extern u32 i2c_get_functionality (struct i2c_adapter *adap);
-/* i2c bus access functions */
-void i2c_start(struct i2c_bus *bus);
-void i2c_stop(struct i2c_bus *bus);
-void i2c_one(struct i2c_bus *bus);
-void i2c_zero(struct i2c_bus *bus);
-int i2c_ack(struct i2c_bus *bus);
+/* Return 1 if adapter supports everything we need, 0 if not. */
+extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);
+
+#endif /* __KERNEL__ */
+
+/* To determine what functionality is present */
+
+#define I2C_FUNC_I2C 0x00000001
+#define I2C_FUNC_10BIT_ADDR 0x00000002
+#define I2C_FUNC_SMBUS_QUICK 0x00010000
+#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
+#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
+#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
+#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
+#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* New I2C-like block */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* transfers */
+
+#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
+ I2C_FUNC_SMBUS_WRITE_BYTE
+#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
+ I2C_FUNC_SMBUS_WRITE_WORD_DATA
+#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
+#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
+ I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
+
+#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
+ I2C_FUNC_SMBUS_BYTE | \
+ I2C_FUNC_SMBUS_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WORD_DATA | \
+ I2C_FUNC_SMBUS_PROC_CALL | \
+ I2C_FUNC_SMBUS_READ_BLOCK_DATA
+
+/*
+ * Data for SMBus Messages
+ */
+union i2c_smbus_data {
+ __u8 byte;
+ __u16 word;
+ __u8 block[33]; /* block[0] is used for length */
+};
+
+/* smbus_access read or write markers */
+#define I2C_SMBUS_READ 1
+#define I2C_SMBUS_WRITE 0
+
+/* SMBus transaction types (size parameter in the above functions)
+ Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
+#define I2C_SMBUS_QUICK 0
+#define I2C_SMBUS_BYTE 1
+#define I2C_SMBUS_BYTE_DATA 2
+#define I2C_SMBUS_WORD_DATA 3
+#define I2C_SMBUS_PROC_CALL 4
+#define I2C_SMBUS_BLOCK_DATA 5
+
+
+/* ----- commands for the ioctl like i2c_command call:
+ * note that additional calls are defined in the algorithm and hw
+ * dependent layers - these can be listed here, or see the
+ * corresponding header files.
+ */
+ /* -> bit-adapter specific ioctls */
+#define I2C_RETRIES 0x0701 /* number times a device adress should */
+ /* be polled when not acknowledging */
+#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
+
+
+/* this is for i2c-dev.c */
+#define I2C_SLAVE 0x0703 /* Change slave address */
+ /* Attn.: Slave address is 7 or 10 bits */
+#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
+
+#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
+#if 0
+#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific adress */
+#endif
-int i2c_sendbyte(struct i2c_bus *bus,unsigned char data,int wait_for_ack);
-unsigned char i2c_readbyte(struct i2c_bus *bus,int last);
+#define I2C_SMBUS 0x0720 /* SMBus-level access */
-/* i2c (maybe) hardware functions */
-int i2c_read(struct i2c_bus *bus, unsigned char addr);
-int i2c_write(struct i2c_bus *bus, unsigned char addr,
- unsigned char b1, unsigned char b2, int both);
+/* ... algo-bit.c recognizes */
+#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
+ /* written byte (except address) */
+#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
+
+
+/* ----- I2C-DEV: char device interface stuff ------------------------- */
+
+#define I2C_MAJOR 89 /* Device major number */
+
+#ifdef __KERNEL__
+
+# ifndef NULL
+# define NULL ( (void *) 0 )
+# endif
+
+# ifndef ENODEV
+# include <asm/errno.h>
+# endif
+
+/* These defines are used for probing i2c client addresses */
+/* Default fill of many variables */
+#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
+
+/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
+ stringified */
+#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
+#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
+#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
+
+/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
+ module header */
+
+#define I2C_CLIENT_MODULE_PARM(var,desc) \
+ static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
+ MODULE_PARM(var,I2C_CLIENT_MODPARM); \
+ MODULE_PARM_DESC(var,desc)
+
+/* This is the one you want to use in your own modules */
+#define I2C_CLIENT_INSMOD \
+ I2C_CLIENT_MODULE_PARM(probe, \
+ "List of adapter,address pairs to scan additionally"); \
+ I2C_CLIENT_MODULE_PARM(probe_range, \
+ "List of adapter,start-addr,end-addr triples to scan " \
+ "additionally"); \
+ I2C_CLIENT_MODULE_PARM(ignore, \
+ "List of adapter,address pairs not to scan"); \
+ I2C_CLIENT_MODULE_PARM(ignore_range, \
+ "List of adapter,start-addr,end-addr triples not to " \
+ "scan"); \
+ I2C_CLIENT_MODULE_PARM(force, \
+ "List of adapter,address pairs to boldly assume " \
+ "to be present"); \
+ static struct i2c_client_address_data addr_data = \
+ {normal_i2c, normal_i2c_range, \
+ probe, probe_range, \
+ ignore, ignore_range, \
+ force}
-int i2c_init(void);
+#endif /* def __KERNEL__ */
#endif /* I2C_H */
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