From 9c0a1f19567ec664d3a5ae1ef4d0a0366820b6a1 Mon Sep 17 00:00:00 2001 From: kaloz Date: Tue, 16 Feb 2010 08:08:54 +0000 Subject: [etrax]: ...and probably claudio forgot to rename this directory, too :) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19655 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../files/arch/cris/arch-v10/drivers/etraxi2c.h | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h (limited to 'target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h') diff --git a/target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h b/target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h new file mode 100644 index 000000000..4235086d5 --- /dev/null +++ b/target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h @@ -0,0 +1,49 @@ +#ifndef _LINUX_ETRAXI2C_H +#define _LINUX_ETRAXI2C_H + +/* etraxi2c _IOC_TYPE, bits 8 to 15 in ioctl cmd */ + +#define ETRAXI2C_IOCTYPE 44 + +/* supported ioctl _IOC_NR's */ + +/* in write operations, the argument contains both i2c + * slave, register and value. + */ + +#define I2C_WRITEARG(slave, reg, value) (((slave) << 16) | ((reg) << 8) | (value)) +#define I2C_READARG(slave, reg) (((slave) << 16) | ((reg) << 8)) + +#define I2C_ARGSLAVE(arg) ((arg) >> 16) +#define I2C_ARGREG(arg) (((arg) >> 8) & 0xff) +#define I2C_ARGVALUE(arg) ((arg) & 0xff) + +#define I2C_WRITEREG 0x1 /* write to an I2C register */ +#define I2C_READREG 0x2 /* read from an I2C register */ + +/* +EXAMPLE usage: + + i2c_arg = I2C_WRITEARG(STA013_WRITE_ADDR, reg, val); + ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_WRITEREG), i2c_arg); + + i2c_arg = I2C_READARG(STA013_READ_ADDR, reg); + val = ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_READREG), i2c_arg); + +*/ + +/* Extended part */ +#define I2C_READ 0x4 /* reads from I2C device */ +#define I2C_WRITE 0x3 /* writes to I2C device */ +#define I2C_WRITEREAD 0x5 /* writes to I2C device where to start reading */ + +typedef struct _I2C_DATA +{ + unsigned char slave; /* I2C address (8-bit representation) of slave device */ + unsigned char wbuf[256]; /* Write buffer (length = 256 bytes) */ + unsigned int wlen; /* Number of bytes to write from wbuf[] */ + unsigned char rbuf[256]; /* Read buffer (length = 256 bytes) */ + unsigned int rlen; /* Number of bytes to read into rbuf[] */ +} I2C_DATA; + +#endif -- cgit v1.2.3