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#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/version.h> #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 */ struct i2c_bus; struct i2c_driver; struct i2c_device; #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 #endif /* I2C_H */