1 files changed, 78 insertions, 0 deletions
diff --git a/firmware/target/arm/imx31/i2c-imx31.h b/firmware/target/arm/imx31/i2c-imx31.h
new file mode 100644
index 0000000000..b36acecfcb
--- /dev/null
+++ b/firmware/target/arm/imx31/i2c-imx31.h
@@ -0,0 +1,78 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Michael Sevakis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef I2C_IMX31_H
+#define I2C_IMX31_H
+
+#include <stdbool.h>
+
+/* I2C module usage masks */
+#define USE_I2C1_MODULE         (1 << 0)
+#define USE_I2C2_MODULE         (1 << 1)
+#define USE_I2C3_MODULE         (1 << 2)
+
+enum i2c_module_number
+{
+    __I2C_NUM_START = -1,
+#if (I2C_MODULE_MASK & USE_I2C1_MODULE)
+    I2C1_NUM,
+#endif
+#if (I2C_MODULE_MASK & USE_I2C2_MODULE)
+    I2C2_NUM,
+#endif
+#if (I2C_MODULE_MASK & USE_I2C3_MODULE)
+    I2C3_NUM,
+#endif
+    I2C_NUM_I2C,
+};
+
+/* Module interface map structure */
+struct i2c_map
+{
+    volatile uint16_t iadr;    /* 0x00 */
+    volatile uint16_t unused1;
+    volatile uint16_t ifdr;    /* 0x04 */
+    volatile uint16_t unused2;
+    volatile uint16_t i2cr;    /* 0x08 */
+    volatile uint16_t unused3;
+    volatile uint16_t i2sr;    /* 0x0C */
+    volatile uint16_t unused4;
+    volatile uint16_t i2dr;    /* 0x10 */
+};
+
+struct i2c_node
+{
+    enum i2c_module_number num; /* Module that this node uses */
+    unsigned int ifdr;          /* Maximum frequency for node */
+    unsigned char addr;         /* Slave address on module */
+};
+
+void i2c_init(void);
+/* Enable or disable the node - modules will be switch on/off accordingly. */
+void i2c_enable_node(struct i2c_node *node, bool enable);
+/* If addr < 0, then raw read */
+int i2c_read(struct i2c_node *node, int addr, unsigned char *data, int count);
+int i2c_write(struct i2c_node *node, const unsigned char *data, int count);
+/* Gain mutually-exclusive access to the node and module to perform multiple
+ * operations atomically */
+void i2c_lock_node(struct i2c_node *node);
+void i2c_unlock_node(struct i2c_node *node);
+
+#endif /* I2C_IMX31_H */