Add i2c_smbus_linux.h/cpp driver to handle ioctl-driven I2C access to /dev/i2c-x nodes on Linux

OpenAuraSDK/OpenAuraSDK.pro

@@ -0,0 +1,16 @@
+TEMPLATE = app
+CONFIG += console c++11
+CONFIG -= app_bundle
+CONFIG -= qt
+
+SOURCES += \
+    i2c_smbus.cpp \
+    AuraController.cpp \
+    OpenAuraSDK.cpp \
+    i2c_smbus_linux.cpp
+
+HEADERS += \
+    i2c_smbus.h \
+    i2c_smbus_linux.h \
+    AuraController.h \
+    OpenAuraSDK.h

OpenAuraSDK/i2c_smbus.cpp

@@ -1,4 +1,5 @@
 #include "i2c_smbus.h"
+#include <string.h>
 
 s32 i2c_smbus_interface::i2c_smbus_write_quick(u8 addr, u8 value)
 {
@@ -118,4 +119,4 @@ s32 i2c_smbus_interface::i2c_smbus_write_i2c_block_data(u8 addr, u8 command, u8
     data.block[0] = length;
     memcpy(&data.block[1], values, length);
     return i2c_smbus_xfer(addr, I2C_SMBUS_WRITE, command, I2C_SMBUS_I2C_BLOCK_DATA, &data);
-}
+}

OpenAuraSDK/i2c_smbus.h

@@ -8,19 +8,18 @@
 |  GNU GPL v2                               |
 \*-----------------------------------------*/
 
-#include <windows.h>
+#ifndef I2C_SMBUS_H
+#define I2C_SMBUS_H
+
 #include <stdio.h>
 #include <stdlib.h>
-#include "inpout32.h"
 
-typedef UINT8   u8;
-typedef UINT16  u16;
-typedef UINT32  uint32_t;
-typedef INT32   s32;
-
-#pragma comment(lib, "inpout32.lib")
-#pragma once
+typedef unsigned char   u8;
+typedef unsigned short  u16;
+typedef unsigned int    u32;
+typedef int             s32;
 
+#ifdef WIN32
 //Data for SMBus Messages
 #define I2C_SMBUS_BLOCK_MAX     32
 
@@ -30,6 +29,11 @@ union i2c_smbus_data
     u16         word;
     u8          block[I2C_SMBUS_BLOCK_MAX + 2];
 };
+#else
+
+#include <linux/i2c.h>
+
+#endif  /* WIN32 */
 
 // i2c_smbus_xfer read or write markers
 #define I2C_SMBUS_READ  1
@@ -64,4 +68,6 @@ public:
 
     //Virtual function to be implemented by the driver
     virtual s32 i2c_smbus_xfer(u8 addr, char read_write, u8 command, int size, i2c_smbus_data* data) = 0;
-};
+};
+
+#endif /* I2C_SMBUS_H */

OpenAuraSDK/i2c_smbus_linux.cpp

@@ -0,0 +1,29 @@
+/*-----------------------------------------*\
+|  i2c_smbus_linux.cpp                      |
+|                                           |
+|  Linux i2c/smbus driver                   |
+|                                           |
+|  Adam Honse (CalcProgrammer1) 2/14/2019   |
+\*-----------------------------------------*/
+
+#include "i2c_smbus.h"
+#include "i2c_smbus_linux.h"
+
+#include <linux/i2c-dev.h>
+#include <linux/i2c.h>
+#include <sys/ioctl.h>
+
+s32 i2c_smbus_linux::i2c_smbus_xfer(u8 addr, char read_write, u8 command, int size, union i2c_smbus_data* data)
+{
+    struct i2c_smbus_ioctl_data args;
+
+    //Tell I2C host which slave address to transfer to
+    ioctl(handle, I2C_SLAVE, addr);
+
+    args.read_write = read_write;
+    args.command = command;
+    args.size = size;
+    args.data = data;
+
+    return ioctl(handle, I2C_SMBUS, &args);
+}

OpenAuraSDK/i2c_smbus_linux.h

@@ -0,0 +1,19 @@
+/*-----------------------------------------*\
+|  i2c_smbus_linux.h                        |
+|                                           |
+|  Definitions and types for Linux i2c/smbus|
+|  driver                                   |
+|                                           |
+|  Adam Honse (CalcProgrammer1) 2/14/2019   |
+\*-----------------------------------------*/
+
+#include "i2c_smbus.h"
+
+class i2c_smbus_linux : public i2c_smbus_interface
+{
+public:
+    int handle;
+
+private:
+    s32 i2c_smbus_xfer(u8 addr, char read_write, u8 command, int size, i2c_smbus_data* data);
+};