Initial revision

1 files changed, 103 insertions, 0 deletions

diff --git a/cpu/mpc824x/drivers/i2c_export.h b/cpu/mpc824x/drivers/i2c_export.h
new file mode 100644
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--- /dev/null
+++ b/cpu/mpc824x/drivers/i2c_export.h
@@ -0,0 +1,103 @@
+#ifndef I2C_EXPORT_H
+#define I2C_EXPORT_H
+
+/****************************************************
+ *
+ * Copyright Motrola 1999
+ *
+ ****************************************************/
+
+/* These are the defined return values for the I2C_do_transaction function.
+ * Any non-zero value indicates failure.  Failure modes can be added for
+ * more detailed error reporting.
+ */
+typedef enum _i2c_status
+{
+ I2C_SUCCESS     = 0,
+ I2C_ERROR,
+} I2C_Status;
+
+/* These are the defined tasks for I2C_do_transaction.
+ * Modes for SLAVE_RCV and SLAVE_XMIT will be added.
+ */
+typedef enum _i2c_transaction_mode
+{
+	I2C_MASTER_RCV =  0,
+	I2C_MASTER_XMIT = 1,
+} I2C_TRANSACTION_MODE;
+
+typedef enum _i2c_interrupt_mode
+{
+	I2C_INT_DISABLE =  0,
+	I2C_INT_ENABLE = 1,
+} I2C_INTERRUPT_MODE;
+
+typedef enum _i2c_stop
+{
+	I2C_NO_STOP =  0,
+	I2C_STOP = 1,
+} I2C_STOP_MODE;
+
+typedef enum _i2c_restart
+{
+	I2C_NO_RESTART =  0,
+	I2C_RESTART = 1,
+} I2C_RESTART_MODE;
+
+/******************** App. API ********************
+ * The application API is for user level application
+ * to use the functionality provided by I2C driver.
+ * This is a "generic" I2C interface, it should contain
+ * nothing specific to the Kahlua implementation.
+ * Only the generic functions are exported by the library.
+ *
+ * Note: Its App.s responsibility to swap the data
+ *       byte. In our API, we just transfer whatever
+ *       we are given
+ **************************************************/
+
+
+/*  Initialize I2C unit with the following:
+ *  driver's slave address
+ *  interrupt enabled
+ *  optional pointer to application layer print function
+ *
+ *  These parameters may be added:
+ *  desired clock rate
+ *  digital filter frequency sampling rate
+ *
+ *  This function must be called before I2C unit can be used.
+ */
+extern I2C_Status I2C_Initialize(
+	unsigned char addr,            /* driver's I2C slave address */
+	I2C_INTERRUPT_MODE en_int,     /* 1 - enable I2C interrupt
+	                                * 0 - disable I2C interrupt
+	                                */
+        int (*app_print_function)(char *,...)); /* pointer to optional "printf"
+                                                 * provided by application
+                                                 */
+
+/* Perform the given I2C transaction, only MASTER_XMIT and MASTER_RCV
+ * are implemented.  Both are only in polling mode.
+ *
+ * en_int controls interrupt/polling mode
+ * act is the type of transaction
+ * addr is the I2C address of the slave device
+ * len is the length of data to send or receive
+ * buffer is the address of the data buffer
+ * stop = I2C_NO_STOP, don't signal STOP at end of transaction
+ *        I2C_STOP, signal STOP at end of transaction
+ * retry is the timeout retry value, currently ignored
+ * rsta = I2C_NO_RESTART, this is not continuation of existing transaction
+ *        I2C_RESTART, this is a continuation of existing transaction
+ */
+extern I2C_Status I2C_do_transaction( I2C_INTERRUPT_MODE en_int,
+                                      I2C_TRANSACTION_MODE act,
+                                      unsigned char i2c_addr,
+                                      unsigned char data_addr,
+                                      int len,
+                                      char *buffer,
+                                      I2C_STOP_MODE stop,
+                                      int retry,
+                                      I2C_RESTART_MODE rsta);
+#endif