/// <summary>
/// Sends a MMC/SD command
/// </summary>
/// <returns>The result of the command.</returns>
/// <param name="fd">File handle</param>
/// <param name="command">MMC/SD opcode</param>
/// <param name="buffer">Buffer for MMC/SD command response</param>
/// <param name="timeout">Timeout in seconds</param>
/// <param name="duration">Time it took to execute the command in milliseconds</param>
/// <param name="sense"><c>True</c> if MMC/SD returned non-OK status</param>
/// <param name="write"><c>True</c> if data is sent from host to card</param>
/// <param name="isApplication"><c>True</c> if command should be preceded with CMD55</param>
/// <param name="flags">Flags indicating kind and place of response</param>
/// <param name="blocks">How many blocks to transfer</param>
/// <param name="argument">Command argument</param>
/// <param name="response">Response registers</param>
/// <param name="blockSize">Size of block in bytes</param>
internal static int SendMmcCommand(int fd, MmcCommands command, bool write,
bool isApplication, MmcFlags flags,
uint argument, uint blockSize, uint blocks,
ref byte[] buffer,
out uint[] response, out double duration, out bool sense,
uint timeout = 0)
{
response = null;
duration = 0;
sense = false;
if (buffer == null)
{
return(-1);
}
MmcIocCmd ioCmd = new MmcIocCmd();
IntPtr bufPtr = Marshal.AllocHGlobal(buffer.Length);
ioCmd.write_flag = write;
ioCmd.is_ascmd = isApplication;
ioCmd.opcode = (uint)command;
ioCmd.arg = argument;
ioCmd.flags = flags;
ioCmd.blksz = blockSize;
ioCmd.blocks = blocks;
if (timeout > 0)
{
ioCmd.data_timeout_ns = timeout * 1000000000;
ioCmd.cmd_timeout_ms = timeout * 1000;
}
ioCmd.data_ptr = (ulong)bufPtr;
Marshal.Copy(buffer, 0, bufPtr, buffer.Length);
DateTime start = DateTime.UtcNow;
int error = Extern.ioctlMmc(fd, LinuxIoctl.MmcIocCmd, ref ioCmd);
DateTime end = DateTime.UtcNow;
sense |= error < 0;
if (error < 0)
{
error = Marshal.GetLastWin32Error();
}
Marshal.Copy(bufPtr, buffer, 0, buffer.Length);
response = ioCmd.response;
duration = (end - start).TotalMilliseconds;
Marshal.FreeHGlobal(bufPtr);
return(error);
}
internal static extern int ioctlMmc(int fd, LinuxIoctl request, ref MmcIocCmd value);