/* ------------------------------------------------------------------------- */ /* */ /* 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 and Frodo Looijaard */ #ifndef _LINUX_I2C_H #define _LINUX_I2C_H #include #ifdef __KERNEL__ #include #include #include #include /* for struct device */ #include /* for completion */ #include extern struct bus_type i2c_bus_type; /* --- General options ------------------------------------------------ */ struct i2c_msg; struct i2c_algorithm; struct i2c_adapter; struct i2c_client; struct i2c_driver; union i2c_smbus_data; struct i2c_board_info; /* * 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 *client, const char *buf, int count); extern int i2c_master_recv(struct i2c_client *client, char *buf, int count); /* Transfer num messages. */ extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num); /* 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 i2c_smbus_xfer. */ 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 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, const u8 *values); /* Returns the number of read bytes */ extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client, u8 command, u8 length, u8 *values); extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client, u8 command, u8 length, const u8 *values); /** * struct i2c_driver - represent an I2C device driver * @id: Unique driver ID (optional) * @class: What kind of i2c device we instantiate (for detect) * @attach_adapter: Callback for bus addition (for legacy drivers) * @detach_adapter: Callback for bus removal (for legacy drivers) * @detach_client: Callback for device removal (for legacy drivers) * @probe: Callback for device binding (new-style drivers) * @remove: Callback for device unbinding (new-style drivers) * @shutdown: Callback for device shutdown * @suspend: Callback for device suspend * @resume: Callback for device resume * @command: Callback for bus-wide signaling (optional) * @driver: Device driver model driver * @id_table: List of I2C devices supported by this driver * @detect: Callback for device detection * @address_data: The I2C addresses to probe, ignore or force (for detect) * @clients: List of detected clients we created (for i2c-core use only) * * The driver.owner field should be set to the module owner of this driver. * The driver.name field should be set to the name of this driver. * * For automatic device detection, both @detect and @address_data must * be defined. @class should also be set, otherwise only devices forced * with module parameters will be created. The detect function must * fill at least the name field of the i2c_board_info structure it is * handed upon successful detection, and possibly also the flags field. * * If @detect is missing, the driver will still work fine for enumerated * devices. Detected devices simply won't be supported. This is expected * for the many I2C/SMBus devices which can't be detected reliably, and * the ones which can always be enumerated in practice. * * The i2c_client structure which is handed to the @detect callback is * not a real i2c_client. It is initialized just enough so that you can * call i2c_smbus_read_byte_data and friends on it. Don't do anything * else with it. In particular, calling dev_dbg and friends on it is * not allowed. */ struct i2c_driver { int id; unsigned int class; /* 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. (LEGACY I2C DRIVERS ONLY) */ 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. (LEGACY I2C DRIVERS ONLY) */ int (*detach_client)(struct i2c_client *) __deprecated; /* Standard driver model interfaces, for "new style" i2c drivers. * With the driver model, device enumeration is NEVER done by drivers; * it's done by infrastructure. (NEW STYLE DRIVERS ONLY) */ int (*probe)(struct i2c_client *, const struct i2c_device_id *); int (*remove)(struct i2c_client *); /* driver model interfaces that don't relate to enumeration */ void (*shutdown)(struct i2c_client *); int (*suspend)(struct i2c_client *, pm_message_t mesg); int (*resume)(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; const struct i2c_device_id *id_table; /* Device detection callback for automatic device creation */ int (*detect)(struct i2c_client *, int kind, struct i2c_board_info *); const struct i2c_client_address_data *address_data; struct list_head clients; }; #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver) /** * struct i2c_client - represent an I2C slave device * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address; * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking * @addr: Address used on the I2C bus connected to the parent adapter. * @name: Indicates the type of the device, usually a chip name that's * generic enough to hide second-sourcing and compatible revisions. * @adapter: manages the bus segment hosting this I2C device * @driver: device's driver, hence pointer to access routines * @dev: Driver model device node for the slave. * @irq: indicates the IRQ generated by this device (if any) * @list: list of active/busy clients (DEPRECATED) * @detected: member of an i2c_driver.clients list * @released: used to synchronize client releases & detaches and references * * An i2c_client identifies a single device (i.e. chip) connected to an * i2c bus. The behaviour exposed to Linux is defined by the driver * managing the device. */ struct i2c_client { unsigned short flags; /* div., see below */ unsigned short addr; /* chip address - NOTE: 7bit */ /* addresses are stored in the */ /* _LOWER_ 7 bits */ char name[I2C_NAME_SIZE]; struct i2c_adapter *adapter; /* the adapter we sit on */ struct i2c_driver *driver; /* and our access routines */ struct device dev; /* the device structure */ int irq; /* irq issued by device */ struct list_head list; /* DEPRECATED */ struct list_head detected; struct completion released; }; #define to_i2c_client(d) container_of(d, struct i2c_client, dev) extern struct i2c_client *i2c_verify_client(struct device *dev); static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj) { struct device * const dev = container_of(kobj, struct device, kobj); return to_i2c_client(dev); } static inline void *i2c_get_clientdata(const 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); } /** * struct i2c_board_info - template for device creation * @type: chip type, to initialize i2c_client.name * @flags: to initialize i2c_client.flags * @addr: stored in i2c_client.addr * @platform_data: stored in i2c_client.dev.platform_data * @archdata: copied into i2c_client.dev.archdata * @irq: stored in i2c_client.irq * * I2C doesn't actually support hardware probing, although controllers and * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's * a device at a given address. Drivers commonly need more information than * that, such as chip type, configuration, associated IRQ, and so on. * * i2c_board_info is used to build tables of information listing I2C devices * that are present. This information is used to grow the driver model tree * for "new style" I2C drivers. For mainboards this is done statically using * i2c_register_board_info(); bus numbers identify adapters that aren't * yet available. For add-on boards, i2c_new_device() does this dynamically * with the adapter already known. */ struct i2c_board_info { char type[I2C_NAME_SIZE]; unsigned short flags; unsigned short addr; void *platform_data; struct dev_archdata *archdata; int irq; }; /** * I2C_BOARD_INFO - macro used to list an i2c device and its address * @dev_type: identifies the device type * @dev_addr: the device's address on the bus. * * This macro initializes essential fields of a struct i2c_board_info, * declaring what has been provided on a particular board. Optional * fields (such as associated irq, or device-specific platform_data) * are provided using conventional syntax. */ #define I2C_BOARD_INFO(dev_type, dev_addr) \ .type = (dev_type), .addr = (dev_addr) /* Add-on boards should register/unregister their devices; e.g. a board * with integrated I2C, a config eeprom, sensors, and a codec that's * used in conjunction with the primary hardware. */ extern struct i2c_client * i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info); /* If you don't know the exact address of an I2C device, use this variant * instead, which can probe for device presence in a list of possible * addresses. */ extern struct i2c_client * i2c_new_probed_device(struct i2c_adapter *adap, struct i2c_board_info *info, unsigned short const *addr_list); /* For devices that use several addresses, use i2c_new_dummy() to make * client handles for the extra addresses. */ extern struct i2c_client * i2c_new_dummy(struct i2c_adapter *adap, u16 address); extern void i2c_unregister_device(struct i2c_client *); /* Mainboard arch_initcall() code should register all its I2C devices. * This is done at arch_initcall time, before declaring any i2c adapters. * Modules for add-on boards must use other calls. */ #ifdef CONFIG_I2C_BOARDINFO extern int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n); #else static inline int i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n) { return 0; } #endif /* * 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 { /* 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 */ /* master_xfer should return the number of messages successfully processed, or a negative value on error */ 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); /* 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; unsigned int class; /* classes to allow probing for */ const 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 */ u8 level; /* nesting level for lockdep */ struct mutex bus_lock; struct mutex clist_lock; int timeout; /* in jiffies */ int retries; struct device dev; /* the adapter device */ int nr; struct list_head clients; /* DEPRECATED */ char name[48]; struct completion dev_released; }; #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) static inline void *i2c_get_adapdata(const 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 client struct: */ #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 */ #define I2C_CLIENT_WAKE 0x80 /* for board_info; true iff can wake */ /* 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) /* DDC bus on graphics adapters */ #define I2C_CLASS_SPD (1<<7) /* SPD EEPROMs and similar */ /* 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 { const unsigned short *normal_i2c; const unsigned short *probe; const unsigned short *ignore; const unsigned short * const *forces; }; /* Internal numbers to terminate lists */ #define I2C_CLIENT_END 0xfffeU /* The numbers to use to set I2C bus address */ #define ANY_I2C_BUS 0xffff /* ----- 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_numbered_adapter(struct i2c_adapter *); extern int i2c_register_driver(struct module *, struct i2c_driver *); extern void i2c_del_driver(struct i2c_driver *); static inline int i2c_add_driver(struct i2c_driver *driver) { return i2c_register_driver(THIS_MODULE, driver); } /* These are deprecated, your driver should use the standard .probe() * and .remove() methods instead. */ extern int __deprecated i2c_attach_client(struct i2c_client *); extern int __deprecated i2c_detach_client(struct i2c_client *); extern struct i2c_client *i2c_use_client(struct i2c_client *client); extern void i2c_release_client(struct i2c_client *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); /* 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, const struct i2c_client_address_data *address_data, int (*found_proc) (struct i2c_adapter *, int, int)); 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; } /* Return the adapter number for a specific adapter */ static inline int i2c_adapter_id(struct i2c_adapter *adap) { return adap->nr; } #endif /* __KERNEL__ */ /** * struct i2c_msg - an I2C transaction segment beginning with START * @addr: Slave address, either seven or ten bits. When this is a ten * bit address, I2C_M_TEN must be set in @flags and the adapter * must support I2C_FUNC_10BIT_ADDR. * @flags: I2C_M_RD is handled by all adapters. No other flags may be * provided unless the adapter exported the relevant I2C_FUNC_* * flags through i2c_check_functionality(). * @len: Number of data bytes in @buf being read from or written to the * I2C slave address. For read transactions where I2C_M_RECV_LEN * is set, the caller guarantees that this buffer can hold up to * 32 bytes in addition to the initial length byte sent by the * slave (plus, if used, the SMBus PEC); and this value will be * incremented by the number of block data bytes received. * @buf: The buffer into which data is read, or from which it's written. * * An i2c_msg is the low level representation of one segment of an I2C * transaction. It is visible to drivers in the @i2c_transfer() procedure, * to userspace from i2c-dev, and to I2C adapter drivers through the * @i2c_adapter.@master_xfer() method. * * Except when I2C "protocol mangling" is used, all I2C adapters implement * the standard rules for I2C transactions. Each transaction begins with a * START. That is followed by the slave address, and a bit encoding read * versus write. Then follow all the data bytes, possibly including a byte * with SMBus PEC. The transfer terminates with a NAK, or when all those * bytes have been transferred and ACKed. If this is the last message in a * group, it is followed by a STOP. Otherwise it is followed by the next * @i2c_msg transaction segment, beginning with a (repeated) START. * * Alternatively, when the adapter supports I2C_FUNC_PROTOCOL_MANGLING then * passing certain @flags may have changed those standard protocol behaviors. * Those flags are only for use with broken/nonconforming slaves, and with * adapters which are known to support the specific mangling options they * need (one or more of IGNORE_NAK, NO_RD_ACK, NOSTART, and REV_DIR_ADDR). */ struct i2c_msg { __u16 addr; /* slave address */ __u16 flags; #define I2C_M_TEN 0x0010 /* this is a ten bit chip address */ #define I2C_M_RD 0x0001 /* read data, from slave to master */ #define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */ #define I2C_M_REV_DIR_ADDR 0x2000 /* if I2C_FUNC_PROTOCOL_MANGLING */ #define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */ #define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */ #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */ __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_NOSTART etc. */ #define I2C_FUNC_SMBUS_PEC 0x00000008 #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_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_WRITE_BLOCK_DATA | \ I2C_FUNC_SMBUS_I2C_BLOCK | \ I2C_FUNC_SMBUS_PEC) /* * Data for SMBus Messages */ #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */ union i2c_smbus_data { __u8 byte; __u16 word; __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */ /* and one more for user-space compatibility */ }; /* i2c_smbus_xfer 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_BROKEN 6 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */ #define I2C_SMBUS_I2C_BLOCK_DATA 8 #ifdef __KERNEL__ /* 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) #define I2C_CLIENT_MODULE_PARM_FORCE(name) \ I2C_CLIENT_MODULE_PARM(force_##name, \ "List of adapter,address pairs which are " \ "unquestionably assumed to contain a `" \ # name "' chip") #define I2C_CLIENT_INSMOD_COMMON \ I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \ "additionally"); \ I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \ "scan"); \ static const struct i2c_client_address_data addr_data = { \ .normal_i2c = normal_i2c, \ .probe = probe, \ .ignore = ignore, \ .forces = forces, \ } #define I2C_CLIENT_FORCE_TEXT \ "List of adapter,address pairs to boldly assume to be present" /* These are the ones you want to use in your own drivers. Pick the one which matches the number of devices the driver differenciates between. */ #define I2C_CLIENT_INSMOD \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ static const unsigned short * const forces[] = { force, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_1(chip1) \ enum chips { any_chip, chip1 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ static const unsigned short * const forces[] = { force, \ force_##chip1, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_2(chip1, chip2) \ enum chips { any_chip, chip1, chip2 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \ enum chips { any_chip, chip1, chip2, chip3 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \ enum chips { any_chip, chip1, chip2, chip3, chip4 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, \ force_##chip4, NULL}; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \ enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, \ force_##chip4, force_##chip5, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \ enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, \ force_##chip4, force_##chip5, force_##chip6, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \ enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ chip7 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, \ force_##chip4, force_##chip5, force_##chip6, \ force_##chip7, NULL }; \ I2C_CLIENT_INSMOD_COMMON #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \ enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ chip7, chip8 }; \ I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \ I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ I2C_CLIENT_MODULE_PARM_FORCE(chip8); \ static const unsigned short * const forces[] = { force, \ force_##chip1, force_##chip2, force_##chip3, \ force_##chip4, force_##chip5, force_##chip6, \ force_##chip7, force_##chip8, NULL }; \ I2C_CLIENT_INSMOD_COMMON #endif /* __KERNEL__ */ #endif /* _LINUX_I2C_H */