[etrax]: ...and probably claudio forgot to rename this directory, too :)

[openwrt/svn-archive/archive.git] / 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 (file)
index 0000000..4235086
--- /dev/null
+++ b/target/linux/etrax/files/arch/cris/arch-v10/drivers/etraxi2c.h
@@ -0,0 +1,49 @@
+#ifndef _LINUX_ETRAXI2C_H\r
+#define _LINUX_ETRAXI2C_H\r
+\r
+/* etraxi2c _IOC_TYPE, bits 8 to 15 in ioctl cmd */\r
+\r
+#define ETRAXI2C_IOCTYPE 44\r
+\r
+/* supported ioctl _IOC_NR's */\r
+\r
+/* in write operations, the argument contains both i2c\r
+ * slave, register and value.\r
+ */\r
+\r
+#define I2C_WRITEARG(slave, reg, value) (((slave) << 16) | ((reg) << 8) | (value))\r
+#define I2C_READARG(slave, reg) (((slave) << 16) | ((reg) << 8))\r
+\r
+#define I2C_ARGSLAVE(arg) ((arg) >> 16)\r
+#define I2C_ARGREG(arg) (((arg) >> 8) & 0xff)\r
+#define I2C_ARGVALUE(arg) ((arg) & 0xff)\r
+\r
+#define I2C_WRITEREG    0x1   /* write to an I2C register */\r
+#define I2C_READREG     0x2   /* read from an I2C register */\r
+\r
+/*\r
+EXAMPLE usage:\r
+\r
+    i2c_arg = I2C_WRITEARG(STA013_WRITE_ADDR, reg, val);\r
+    ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_WRITEREG), i2c_arg);\r
+\r
+    i2c_arg = I2C_READARG(STA013_READ_ADDR, reg);\r
+    val = ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_READREG), i2c_arg);\r
+\r
+*/\r
+\r
+/* Extended part */\r
+#define I2C_READ        0x4     /* reads from I2C device */\r
+#define I2C_WRITE       0x3     /* writes to I2C device */\r
+#define I2C_WRITEREAD   0x5        /* writes to I2C device where to start reading */\r
+\r
+typedef struct _I2C_DATA \r
+{\r
+    unsigned char slave;        /* I2C address (8-bit representation) of slave device */\r
+    unsigned char wbuf[256];    /* Write buffer (length = 256 bytes) */\r
+       unsigned int  wlen;         /* Number of bytes to write from wbuf[] */   \r
+       unsigned char rbuf[256];    /* Read buffer (length = 256 bytes) */\r
+    unsigned int  rlen;         /* Number of bytes to read into rbuf[] */\r
+} I2C_DATA;\r
+\r
+#endif\r