1 files changed, 49 insertions, 0 deletions
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..9d5c9bf95
--- /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