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Diffstat (limited to 'include/linux/i2c.h')
| -rw-r--r-- | include/linux/i2c.h | 594 |
1 files changed, 594 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h new file mode 100644 index 00000000000..ebcd745f4cd --- /dev/null +++ b/include/linux/i2c.h @@ -0,0 +1,594 @@ +/* ------------------------------------------------------------------------- */ +/* */ +/* i2c.h - definitions for the i2c-bus interface */ +/* */ +/* ------------------------------------------------------------------------- */ +/* Copyright (C) 1995-2000 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. */ +/* ------------------------------------------------------------------------- */ + +/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and + Frodo Looijaard <frodol@dds.nl> */ + +/* $Id: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */ + +#ifndef _LINUX_I2C_H +#define _LINUX_I2C_H + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/i2c-id.h> +#include <linux/device.h> /* for struct device */ +#include <asm/semaphore.h> + +/* --- General options ------------------------------------------------ */ + +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 *msgs, 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); + + + +/* 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); +/* Returns the number of bytes transferred */ +extern s32 i2c_smbus_write_block_data(struct i2c_client * client, + u8 command, u8 length, + u8 *values); +extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client, + u8 command, u8 *values); + +/* + * 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 { + struct module *owner; + char name[32]; + int id; + unsigned int class; + 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 *); + int (*detach_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); + + struct device_driver driver; + struct list_head list; +}; +#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver) + +#define I2C_NAME_SIZE 50 + +/* + * 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 { + 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 */ + int usage_count; /* How many accesses currently */ + /* to the client */ + struct device dev; /* the device structure */ + struct list_head list; + char name[I2C_NAME_SIZE]; + struct completion released; +}; +#define to_i2c_client(d) container_of(d, struct i2c_client, dev) + +static inline void *i2c_get_clientdata (struct i2c_client *dev) +{ + return dev_get_drvdata (&dev->dev); +} + +static inline void i2c_set_clientdata (struct i2c_client *dev, void *data) +{ + dev_set_drvdata (&dev->dev, data); +} + +#define I2C_DEVNAME(str) .name = str + +static inline char *i2c_clientname(struct i2c_client *c) +{ + return &c->name[0]; +} + +/* + * 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 an adapter algorithm can't do 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 *); +}; + +/* + * i2c_adapter is the structure used to identify a physical i2c bus along + * with the access algorithms necessary to access it. + */ +struct i2c_adapter { + struct module *owner; + unsigned int id;/* == is algo->id | hwdep.struct->id, */ + /* for registered values see below */ + unsigned int class; + struct i2c_algorithm *algo;/* the algorithm to access the bus */ + void *algo_data; + + /* --- administration stuff. */ + int (*client_register)(struct i2c_client *); + int (*client_unregister)(struct i2c_client *); + + /* data fields that are valid for all devices */ + struct semaphore bus_lock; + struct semaphore clist_lock; + + int timeout; + int retries; + struct device dev; /* the adapter device */ + struct class_device class_dev; /* the class device */ + +#ifdef CONFIG_PROC_FS + /* No need to set this when you initialize the adapter */ + int inode; +#endif /* def CONFIG_PROC_FS */ + + int nr; + struct list_head clients; + struct list_head list; + char name[I2C_NAME_SIZE]; + struct completion dev_released; + struct completion class_dev_released; +}; +#define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) +#define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev) + +static inline void *i2c_get_adapdata (struct i2c_adapter *dev) +{ + return dev_get_drvdata (&dev->dev); +} + +static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data) +{ + dev_set_drvdata (&dev->dev, data); +} + +/*flags for the driver struct: */ +#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */ +#if 0 +/* this flag is gone -- there is a (optional) driver->detach_adapter + * callback now which can be used instead */ +# define I2C_DF_DUMMY 0x02 +#endif + +/*flags for the client struct: */ +#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */ +#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */ + /* on an i2c_client */ +#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ +#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ + /* Must equal I2C_M_TEN below */ + +/* i2c adapter classes (bitmask) */ +#define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */ +#define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */ +#define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */ +#define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */ +#define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */ +#define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */ +#define I2C_CLASS_SOUND (1<<6) /* sound devices */ +#define I2C_CLASS_ALL (UINT_MAX) /* all of the above */ + +/* 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 0xfffeU +#define I2C_CLIENT_ISA_END 0xfffefffeU + +/* The numbers to use to set I2C bus address */ +#define ANY_I2C_BUS 0xffff +#define ANY_I2C_ISA_BUS 9191 + + +/* ----- 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 *); + +/* New function: This is to get an i2c_client-struct for controlling the + client either by using i2c_control-function or having the + client-module export functions that can be used with the i2c_client + -struct. */ +extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id, + struct i2c_client *prev); + +/* Should be used with new function + extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *); + to make sure that client-struct is valid and that it is okay to access + the i2c-client. + returns -EACCES if client doesn't allow use (default) + returns -EBUSY if client doesn't allow multiple use (default) and + usage_count >0 */ +extern int i2c_use_client(struct i2c_client *); +extern int i2c_release_client(struct i2c_client *); + +/* call the i2c_client->command() of all attached clients with + * the given arguments */ +extern void i2c_clients_command(struct i2c_adapter *adap, + unsigned int cmd, void *arg); + +/* returns -EBUSY if address has been taken, 0 if not. Note that the only + other place at which this is called is within i2c_attach_client; so + you can cheat by simply not registering. Not recommended, of course! */ +extern int i2c_check_addr (struct i2c_adapter *adapter, int addr); + +/* Detect function. It iterates over all possible addresses itself. + * It will only call found_proc if some client is connected at the + * specific address (unless a 'force' matched); + */ +extern int i2c_probe(struct i2c_adapter *adapter, + struct i2c_client_address_data *address_data, + int (*found_proc) (struct i2c_adapter *, int, int)); + +/* 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 registered. + */ +extern int i2c_adapter_id(struct i2c_adapter *adap); +extern struct i2c_adapter* i2c_get_adapter(int id); +extern void i2c_put_adapter(struct i2c_adapter *adap); + + +/* Return the functionality mask */ +static inline u32 i2c_get_functionality(struct i2c_adapter *adap) +{ + return adap->algo->functionality(adap); +} + +/* Return 1 if adapter supports everything we need, 0 if not. */ +static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func) +{ + return (func & i2c_get_functionality(adap)) == func; +} + +/* + * I2C Message - used for pure i2c transaction, also from /dev interface + */ +struct i2c_msg { + __u16 addr; /* slave address */ + __u16 flags; +#define I2C_M_TEN 0x10 /* we have a ten bit chip address */ +#define I2C_M_RD 0x01 +#define I2C_M_NOSTART 0x4000 +#define I2C_M_REV_DIR_ADDR 0x2000 +#define I2C_M_IGNORE_NAK 0x1000 +#define I2C_M_NO_RD_ACK 0x0800 + __u16 len; /* msg length */ + __u8 *buf; /* pointer to msg data */ +}; + +/* To determine what functionality is present */ + +#define I2C_FUNC_I2C 0x00000001 +#define I2C_FUNC_10BIT_ADDR 0x00000002 +#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */ +#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */ +#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 /* I2C-like block xfer */ +#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */ +#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */ +#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */ +#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */ +#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */ + +#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_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \ + I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2) +#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \ + I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC) +#define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \ + I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC) + +#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA +#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA +#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA +#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA +#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA +#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA + +#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_WRITE_BLOCK_DATA | \ + I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \ + I2C_FUNC_SMBUS_I2C_BLOCK) + +/* + * Data for SMBus Messages + */ +#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */ +#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */ +union i2c_smbus_data { + __u8 byte; + __u16 word; + __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */ + /* one more for read length in block process call */ + /* and one more for PEC */ +}; + +/* 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 +#define I2C_SMBUS_I2C_BLOCK_DATA 6 +#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */ +#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */ +#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */ +#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */ +#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */ + + +/* ----- 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 of times a device address */ + /* 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_SLAVE_FORCE 0x0706 /* Change slave address */ + /* Attn.: Slave address is 7 or 10 bits */ + /* This changes the address, even if it */ + /* is already taken! */ +#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */ + +#define I2C_FUNCS 0x0705 /* Get the adapter functionality */ +#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/ +#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */ +#if 0 +#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */ +#endif + +#define I2C_SMBUS 0x0720 /* SMBus-level access */ + +/* ... 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 */ + +/* These defines are used for probing i2c client addresses */ +/* The length of the option lists */ +#define I2C_CLIENT_MAX_OPTS 48 + +/* 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} + +/* 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; \ + static unsigned int var##_num; \ + module_param_array(var, short, &var##_num, 0); \ + 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, \ + .normal_i2c_range = normal_i2c_range, \ + .probe = probe, \ + .probe_range = probe_range, \ + .ignore = ignore, \ + .ignore_range = ignore_range, \ + .force = force, \ + } + +/* Detect whether we are on the isa bus. If this returns true, all i2c + access will fail! */ +#define i2c_is_isa_client(clientptr) \ + ((clientptr)->adapter->algo->id == I2C_ALGO_ISA) +#define i2c_is_isa_adapter(adapptr) \ + ((adapptr)->algo->id == I2C_ALGO_ISA) + +#endif /* _LINUX_I2C_H */ |